JP5545583B1 - Ratchet mechanism fastening device - Google Patents

Abstract

[PROBLEMS] To prevent a bolt head or a nut and a gripping body from being rotated, and to greatly reduce the frictional resistance during tightening without significantly different from ordinary use.
An elasticity applying portion is attached so as to apply an elastic force that presses an outer surface in the axial direction of a nut inserted into a square hole of a ratchet gear. The square hole 21 and the nut 50 of the ratchet gear 2 attached to the grip portion main body 1 by the elasticity applying portion 70 are normally in contact with the grip portion main body 1 and the nut 50, and the grip portion main body 1 is a nut. 50 and one. The elasticity applying portion 70 that applies the elastic force in the axial direction of the nut 50 of the ratchet gear 2 applies an external force that presses the nut 50 held by the square hole 21 of the ratchet gear 2. In the relationship of the male screw, the female screw is in contact with the advance flank of the female screw during tightening, but the elastic force applied by the elasticity applying portion 70 gives elastic force to the frictional resistance and Increase friction resistance.
[Selection] Figure 3

Description

  The present invention relates to a ratchet mechanism that can freely rotate in a specific direction used for a ratchet wrench, a spectacle wrench, and the like, and restrains the rotation in the opposite direction, and is used for tightening. The present invention relates to a ratchet mechanism-clamping device to which a mechanism for preventing rotation is added.

  For example, a technique similar to the present invention in which a bolt and nut are tightened in a specific rotation direction by a ratchet mechanism, and the rotation position of the bolt and nut is kept as it is by rotating in the opposite direction, to secure the rotation stroke of the handle. There are techniques of Patent Document 1 and Patent Document 2.

  The conventional ratchet wrench 100 of the technique of Patent Document 1 includes a handle 101 that is a gripping portion, and two ratchet portions 102 provided at both ends of the handle 101. The ratchet portion 102 rotatably supports a socket portion 103 as an engaging portion, and a plurality of edges that engage with a fastener such as a nut are formed on the inner peripheral surface of the through hole of the socket portion 103. A ratchet (not shown) that meshes with the end of the direction switching lever 104 is provided on the outer peripheral surface of the socket portion 103. The direction switching lever 104 capable of swinging in the direction of the arrow in the figure restricts the rotational direction of the socket portion 103 to only one direction, and the meshing direction with the above-mentioned pawl wheel is changed depending on the swing position. By doing so, the rotation regulation direction is changed. In the ratchet wrench 100 having such a configuration, an operator simply rotates the handle 101 reciprocally at an arbitrary angle around the ratchet portion 102, and tightens or loosens the socket portion 103 engaged with a nut or the like. Can only be rotated. In the description of Patent Document 1, the numerical numbers with () indicate the part numbers of Patent Document 1.

  In any of the ratchet wrench including the socket wrench, in order to fasten a fastener such as a nut, it is necessary to largely rotate an arm having a handle. During the temporary tightening operation, the fastener must be rotated many times. If such an arm movement is repeated many times, the work efficiency is deteriorated. In addition, the frictional resistance of the fasteners such as nuts during temporary fastening is extremely weak, so if the handle rotates in the direction opposite to the tightening direction, the fasteners such as nuts also rotate reversely before the ratchet mechanism functions. . At the time of temporary fastening, in order to avoid such reverse rotation, it is necessary to rotate the handle in one direction instead of reciprocating rotation, which further deteriorates the work efficiency of temporary fastening. For these reasons, when temporarily tightening a fastener such as a nut, it is common to rotate the fastener only with the fingertips without using a ratchet wrench or socket wrench.

  However, a fastener such as a nut is a shape such as a hexagon bolt that enables engagement with a tool, and does not completely fit the fingertip. Moreover, the rotation work with the fingertip near the rotation axis is not always easy. Therefore, Patent Document 1 includes a handle that is gripped by an operator, an engagement portion that engages with a fastener such as a bolt, and a ratchet portion that regulates the rotation direction of the engagement portion. In a ratchet type tightening tool for tightening the fastener by rotating the engagement portion in a predetermined direction by applying a reciprocating rotational force as an axis to the handle portion, without rotating the handle portion. A knob member is provided that transmits a rotational force to the engaging portion in a state of being fixedly held.

Further, Patent Document 2 discloses that a torcia-type high-strength bolt primary tightening capable of efficiently performing the primary tightening of the nut while suppressing the rotation of the nut even if the torcia-type high-strength bolt head is hidden. A wrench is provided.
That is, in the wrench that primarily tightens the Torcia type high strength bolt, it is attached to the runner that rotates the nut that is screwed to the Torcia type high strength bolt, the handle that transmits the rotational force to the runner, and the pin tail of the Torcia type high strength bolt And a presser part that restricts rotation of the pintail, and the presser part is rotatable relative to the runner part.
With these configurations, the presser portion is attached to the pin tail of the torcia type high strength bolt and restricts the rotation of the pin tail. On the other hand, the handle transmits the rotational force to the runner part, and the runner part rotates to tighten the nut, but the presser part is rotatable relative to the runner part, so it does not rotate with the runner part. As a result, the rotation of the nut and the torcia type high strength bolt can be suppressed, and the primary tightening of the nut can be performed efficiently.

JP 2001-347465 A JP 2010-179428

However, in the technique of Patent Document 1, the rotational force is transmitted to the knob member as a grip provided in the engaging portion while the handle is fixedly held without rotating the handle. As a result, the bolts or nuts rotate together.
However, the rotation of the knob member corresponds to the rotation of the bolt or the nut. In order to shift from the rotation of the knob member to the rotation of the handle, it is necessary to rotate both the knob member and the handle. It is not possible to simply shift from the rotation of the knob member to the rotation of the handle.

Further, in the technique of Patent Document 2, the rotation is prevented as a torcia-type high-strength bolt, but this is a head slip stopper, and a pin tail is present in a general bolt or nut. It cannot be used as a versatile technology.
That is, when bolts and nuts are tightened, it is necessary to perform rotation in a specific direction by a ratchet mechanism and to perform rotation in the opposite direction to ensure the tightening stroke. However, even if the rotation is to secure a stroke for tightening the bolt and nut, the ratchet mechanism must get over the gear while receiving the elastic force to release the engagement.
At this time, if the frictional resistance for tightening the bolts and nuts is small, the frictional force over the gears will increase, causing the bolts or nuts and the handle body as a handle to be rotated, making it difficult to tighten the bolts and nuts. .

  Therefore, the present invention is less likely to cause a rotation between the grip body and the bolt head or nut, which is a handle, and does not significantly increase the frictional resistance when tightening the bolt head and nut. It is an object of the present invention to provide a ratchet mechanism-clamping device with little difference between use and use.

  A fastening device with a ratchet mechanism according to the invention of claim 1 is fitted with a gripping part main body serving as a handle gripped by an operator's hand, a nut or a bolt head, and the nut or the bolt head A rectangular hole such as a hexagon or a twelve corner that restrains relative rotation is formed inside, a gear is formed on the outer periphery thereof, and a ratchet gear that is rotatably disposed at an end of the gripping body, and An oscillating lever that engages with a ratchet gear and has an engaging protrusion that restrains the rotation of the ratchet gear, and is switchable by an operator's hand to specify the position of the engaging protrusion by elastic contact of an elastic body; The nut and the bolt inserted in the square hole of the ratchet gear are elastically attached to the gripper body so as to apply an axial elastic force to the nut or the bolt head that presses the outer surface of the bolt in the axial direction. Parts are those having a.

Here, the grip portion main body is a lever or handle portion of a wrench that is gripped by an operator's hand, and its length is determined by the nut or bolt head to be handled.
The ratchet gear is rotatably disposed at one or both ends of the gripper main body, and accepts insertion of a nut or bolt head in this state, and is relative to the nut or bolt head. A square hole that fits into the nut or bolt head that allows or restrains rotation is formed inside, and a gear is formed on the outer periphery. The square hole may be any hole that can restrain a square, hexagon, or twelve corner that restrains relative rotation with the nut or bolt head.
The swing lever has an engagement projection that meshes with the teeth of the ratchet gear and restricts the rotation of the ratchet gear, and an operator is required to specify the position of the engagement projection by the elastic contact of the elastic body. It can be switched freely by hand. The ratchet gear and the swing lever constitute a ratchet mechanism.
Further, the elasticity applying portion is attached so as to apply an elastic force in a perpendicular direction to the gripping portion main body that presses the outer surface in the axial direction of the nut or bolt head inserted into the square hole of the ratchet gear. is there.

The elasticity applying portion according to the ratchet mechanism-clamping device of the invention of claim 2 applies an elastic force in the axial direction of the nut or the bolt, and is also rotatable in the length direction of the gripping portion main body. It is attached to.
Here, the elasticity applying portion applies an elastic force in the axial direction of the nut or the bolt and is rotatable with respect to the gripping portion main body.

The elasticity applying portion according to the ratchet mechanism-clamping device of the invention of claim 3 applies an elastic force in a direction perpendicular to the grip portion main body, and is movable forward and backward substantially parallel to the grip portion main body. Is.
Here, the elasticity applying portion applies an elastic force in a direction perpendicular to the length direction of the gripping portion main body, and is movable forward and backward in parallel to the gripping portion main body.

  The ratchet gear with a ratchet mechanism according to claim 1, wherein the ratchet gear having a gear formed on the outer periphery thereof rotatably disposed at the end of the gripper body is rotated by the operator in the right direction or in the left direction. The rotation can be switched freely. The swing lever determines the position of the engaging protrusion that restrains the rotation of the ratchet gear by elastic contact of the elastic body, and determines the rotation direction of the ratchet gear. The nut or bolt head is fitted into a square hole such as a hexagon of the ratchet gear, and the gripper body is gripped by the operator's hand. The square hole of the ratchet gear rotates the nut or bolt head in a specific direction. Let At this time, the ratchet gear abuts on the engaging protrusion, and when the rotation of the ratchet gear is constrained, the ratchet gear rotates together with the grip portion main body. That is, the nut or the bolt head is rotated in the tightening direction by the rotation of the gripping body.

  Further, when the nut or the bolt head is rotated in the opposite direction to the gripping body, the square hole of the ratchet gear rotates and tightens the nut or the bolt head. The rotation is in the opposite direction. At this time, the position of the oscillating lever set by the operator is such that the elastic projection is retracted by the elasticity except for the elastic contact of the elastic body except for the rotation in the direction of tightening the nut or the bolt head, and the ratchet gear Rotates in the opposite direction of tightening the nut or the bolt head. That is, the nut or the bolt head is in a state of being fitted into a square hole of the ratchet gear, and the engagement protrusion engaged around the ratchet gear is retracted by its elasticity, and the gripping part main body and the The connection with the nut or the bolt head is released.

At this time, when the nut or the bolt head is in a predetermined tightening state and the frictional resistance between them is large, the nut or the bolt head is rotated and tightened in a direction opposite to the direction in which the nut or the bolt head is tightened. Done.
However, when the frictional resistance only in the direction opposite to the direction in which the nut or the bolt head is rotated and tightened is small, or the frictional resistance in the direction in which the nut or the bolt head is rotated and tightened is opposite to the direction of tightening When the frictional resistance in the direction is small, the nut or the bolt head and the grip portion main body are rotated, and it is difficult to tighten the bolt and nut only by operating the grip portion main body.

  However, in the present invention, the nut or the bolt head of the ratchet gear that presses one outer surface of the nut or the bolt head inserted in the hexagonal square hole of the ratchet gear in the axial direction. The elasticity applying portion is attached so as to apply the elastic force in the axial direction. By this elasticity imparting portion, the square hole of the ratchet gear and the nut or bolt head attached to the grip portion main body are normally in contact with the grip portion main body and the nut or bolt head. The grip portion main body is in contact with the nut or the bolt head in a wide area. However, the elasticity applying portion that applies the elastic force in the axial direction of the nut or the bolt head of the ratchet gear applies an external force that presses the nut or the bolt head held by the square hole of the ratchet gear. The nut or the bolt head is in contact with the advance flank of the male screw during tightening in the relationship between the female screw and the male screw. Since the elastic force is given to the frictional resistance of the leading flank, the frictional resistance with the counterpart material can be increased. Even if the play side flank is in contact, the square hole of the gripping part main body is locked with the nut or the bolt head, so that the frictional resistance with the mating member can be increased.

Therefore, even when the contact friction resistance in the direction opposite to the direction in which the nut or the bolt head is rotated and tightened is small, the elasticity applying portion applies an elastic force to the nut or the bolt head in the axial direction. Therefore, it is possible to increase the frictional resistance for rotating the nut or the bolt head with a high probability.
Further, when the elasticity applying portion applies an elastic force in the axial direction of the nut or the bolt head, it does not apply an elastic force uniformly to the axial direction of the nut or the bolt head, Since it is partially applied, the frictional resistance for rotating the nut or the bolt head can be increased with a high probability.
Accordingly, a ratchet mechanism-clamping device that hardly causes the nut or bolt to be tightened and the gripping body to be rotated and that does not significantly increase the frictional resistance when the bolt and the nut are tightened. can do.

The said elastic provision part of the clamping device with a ratchet mechanism of Claim 2 applies the elastic force of the axial direction of the said nut or the said bolt, and was attached rotatably with respect to the length direction of the said holding | maintenance part main body. Therefore, in addition to the effect according to claim 1, when the nut or the bolt head is fitted into a square hole of the ratchet gear, it is inserted by receiving an elastic force to be in a fitted state, and the elasticity Since the imparting portion can determine the engagement state of the nut or the bolt head with the square hole of the ratchet gear, it can be used without being aware of the magnitude of the elastic force of the elasticity imparting portion.

The elasticity applying portion of the ratchet mechanism-clamping device according to claim 3 applies an elastic force in an axial direction of the nut or the bolt and is attached so as to be movable back and forth in parallel to the length direction of the gripping portion main body. Therefore, in addition to the effect of the first aspect, it is only necessary to advance and retreat as necessary. I don't feel. In use, if the nut or the bolt head is fitted into the square hole of the ratchet gear, the elasticity applying portion is used.

1 is a cross-sectional view of a main part of a ratchet mechanism-clamping device according to a first embodiment of the present invention. FIGS. 2A and 2B are explanatory views for explaining the operation of the ratchet mechanism-clamping apparatus according to the first embodiment of the present invention. FIG. 2A shows a case where tightening is performed by rotating clockwise or a case where it is released, and FIG. This is an example of the cancellation. FIG. 3 is an overall perspective view seen from one surface of the ratchet mechanism-tightening device according to the first embodiment of the present invention. FIG. 4 is an overall perspective view seen from the other surface of the ratchet mechanism-clamping device according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view of an essential part for logical explanation in which the ratchet mechanism of the ratchet mechanism-tightening device according to the first embodiment of the present invention is omitted. FIG. 6 is a cross-sectional view of an essential part for logical explanation in which the ratchet mechanism of another example of the ratchet mechanism-tightening device according to the first embodiment of the present invention is omitted. 7A and 7B show an elasticity applying portion of the ratchet mechanism-clamping device according to the second embodiment of the present invention. FIG. 7A is a plan view having a partial cross section elongated in the length direction, and FIG. FIG. FIG. 8 is a perspective view showing the entire ratchet mechanism-clamping device according to the third embodiment of the present invention. FIG. 9 is a perspective view showing the entirety of a ratchet mechanism-clamping device in which the free end portions of the elasticity applying portions according to the fourth embodiment of the present invention are different. FIG. 10 is a cross-sectional view of the main part showing the main part of the ratchet mechanism-clamping apparatus in which the ratchet mechanism according to the fifth embodiment of the present invention is omitted.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in the embodiments, the same reference numerals and the same reference numerals are the same or corresponding functional parts, and therefore, redundant description thereof is omitted here. In particular, since the embodiment has the same function from the center to the left and right, both are represented by the same symbol and the same symbol.

[Embodiment 1]
First, Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 shows a tightening device with a ratchet mechanism according to an embodiment of the present invention. A gripping body 1 serving as a handle gripped by an operator's hand is composed of two plate materials 11, 12 on the front and back sides shown in FIG. It is comprised from the core material 10 pinched | interposed between them.
The ratchet gear 2 is rotatably disposed with respect to the two plate members 11 and 12 on the front and back of FIG. The ratchet gear 2 is fitted with a nut 50 or a bolt head 62, and a hexagonal square hole 21 for restraining relative rotation with the nut 50 or the bolt head 62 is formed inside, and the gear 22 is provided on the concentric outer periphery thereof. Forming.

On both sides of the ratchet gear 2, the outer circumference is a concentric circle with a diameter equal to or less than the valley bottom of the gear 22, and a projecting circle 23 that functions as a rotating shaft is formed. The protruding circle 23 is fitted in a fitting hole 15 formed for the two plate members 11 and 12 on the front and back sides of FIG. In this state, the protruding circle 23 of the ratchet gear 2 is rotatable in the right direction R and also in the left direction L while being fitted in the fitting hole 15.
The illustrated ratchet gear 2 is formed with a hexagonal square hole 21 at the center thereof. The hexagonal square hole 21 may be a conventional dodecagonal square hole 21. When practicing the present invention, a square hole corresponding to any nut 50 or bolt head 62 of triangle, square, hexagon, and twelve squares may be used.

  The swing lever 4 that can be switched by the operator's hand has engagement protrusions 41 and 42 that mesh with the teeth of the gear 22 of the ratchet gear 2 and restrain the rotation of the ratchet gear 2. Further, in order to specify the positions of the engagement protrusions 41 and 42 by the elastic contact of the elastic body 6, the left part to be rotated when the gripping part main body 1 is rotated to the left about the nut 50 or the bolt head 62. The rotation operation unit 4 </ b> L and the right rotation operation unit 4 </ b> R that rotates when the gripping unit main body 1 rotates to the right about the nut 50 or the bolt head 62 are provided. For example, when the left rotation operation portion 4L is pressed, it rotates about the attachment shaft 43 formed of a rivet, and the engagement protrusion 41 contacts the gear 22 on the outer periphery of the ratchet gear 2. At this time, the ball 5 is in elastic contact with the swing lever 4 by a spring 6 as an elastic body. The elastic contact position of the swing lever 4 is a position on the right side of the swing lever center line 44 from which the swing lever 4 protrudes, and is in a stable and stationary state.

  Further, the spring 6 as an elastic body is mounted in an insertion hole 13 formed in the core metal 10, and the ball 5 is disposed at the end thereof. Accordingly, since the ball 5 is always given elastic force to the swing lever 4 side, the contact position with the swing lever 4 is determined by the distance from the mounting shaft 43 of the swing lever 4. At the same time, since the swing lever 4 receives the elastic force of the spring 6 as an elastic body via the ball 5, when the swing lever 4 is located on the left side of the swing lever center line 44 in FIG. The pressing state of the operation unit 4R is held. Further, when the left rotation operation portion 4L is pressed, the swing lever 4 rotates about the mounting shaft 43, and the ball 5 exceeds the swing lever center line 44 and is closer to the swing lever center line 44 than FIG. ) To the right of the left rotation operation portion 4L. Then, when the left rotation operation portion 4L is pressed, the swing lever 4 rotates about the mounting shaft 43, and the ball 5 exceeds the swing lever center line 44 and is closer to the swing lever center line 44 than FIG. The left rotation operation portion 4L is pressed and the nut 50 or the bolt head 62 is rotated to the left.

  As shown in FIG. 2B, when the engagement protrusion 41 of the swing lever 4 is in contact with the outer peripheral gear 22 of the ratchet gear 2, the rotation of the ratchet gear 2 causes the engagement protrusion 41 of the ratchet gear 2 to rotate. The gripper main body 1 and the ratchet gear 2 rotate together as a result of coming into contact with the outer peripheral gear 22 on the surface. However, since the inner side of the engagement protrusion 41 and the engagement protrusion 42 is formed in a substantially U shape when the gripper body 1 rotates in the clockwise direction shown in the figure with respect to the ratchet gear 2, The position of the line contact of the mating protrusion 41 gradually rotates to the right, and the periphery of the ratchet gear 2 can be rotated to the right.

  Further, as shown in FIG. 2A, the engagement protrusion 42 comes into contact with the outer peripheral gear 22 of the ratchet gear 2 by pressing the right rotation operation portion 4 </ b> R. When the engagement protrusion 42 of the swing lever 4 is in contact with the outer peripheral gear 22 of the ratchet gear 2, the rotation of the ratchet gear 2 causes the engagement protrusion 42 to contact the outer peripheral gear 22 of the ratchet gear 2 on the surface. The grip body 1 and the ratchet gear 2 are integrally rotated to the right. However, when the gripping part main body 1 and the left-hand side of the drawing are rotated with respect to the ratchet gear 2, the engagement protrusion 42 is gradually formed because the inside of the engagement protrusion 42 is gradually changed. The position of the line contact is rotated in the right direction, and the periphery of the ratchet gear 2 can be rotated in the left direction.

The two plate members 11 and 12 and the core member 10 on the front and back sides of the gripping body 1 are rotatably provided with ratchet gears 2 on both sides, and swing levers 4 on both sides are rotatably provided. These are fixed by a mounting shaft 43 made of rivets and two fastening rivets 14.
The description so far is the basic configuration of a wrench as a known ratchet mechanism fastening device.

  In the embodiment of the present invention, as shown in FIGS. 3 to 6, nuts 50 and bolts inserted into the square holes 21 made of any one of hexagons, twelve angles, etc. of the ratchet gear 2 of the present embodiment. An elastic body made of an elastic body attached to the fastening rivet 14 of the gripping body 1 so as to apply an elastic force in the direction of the bolt shaft 61 to the nut 50 or the bolt head 62 that presses one of the outer surfaces of the 60 bolt shafts 61. An imparting unit 70 is provided.

The elasticity imparting portion 70 includes a main body 73 obtained by punching a plate material in a substantially rectangular shape, one of which is formed in a plate shape like an electric terminal, and a fixing portion 71 through which the fastening rivet 14 is inserted and pivotally supported, and the other end. Has a free end 72 curved like a spoon. In the present embodiment, the elasticity applying portion 70 is processed with a plate material, but it may be formed with a wire material or a tube material. In any case, the abutting portion of the nut 50 or the bolt head 62 only needs to efficiently transmit the elastic force between the abutting portion of the nut 50 or the bolt head 62 from the fastening rivet 14 to the nut 50 or the bolt head 62. Further, any structure may be used as long as the nut 50 or the bolt head 62 is not rotated when the nut 50 or the bolt head 62 is rotated.
The two fastening rivets 14 used here are preferably formed in two stages with different diameters. The large-diameter portion pivotally supports the fixing portion 71 and the small-diameter portion has two plate members. It is desirable to press 11 and 12 against the core material 10. The two mounting shafts 43 are not different from the conventional structure in the present embodiment.

In addition, the elasticity provision part 70 of this Embodiment is each arrange | positioned with respect to the one ratchet gear 2 by the fastening rivet 14, and the two board | plate materials 11 and 12 side of the front and back are each shown in FIG.3 and FIG.4. As described above, a total of four elasticity applying portions 70 are provided on the front and back surfaces by the fixing means including the two fastening rivets 14. However, when carrying out the present invention, two may be provided only on one side, or one on each of the front and back sides.
In particular, in the present embodiment, the four elasticity imparting portions 70 attached by the fastening rivets 14 for rotation are used. The fixing portion 71 may be indicated, and both ends may be the free end portion 72 of the contact portion of the nut 50 or the bolt head 62, or may be a structure on both sides.

  In this embodiment, when the free end portion 72 of the elasticity applying portion 70 is elastically contacted with the surface of the nut 50, it is disposed so as to contact the end surface of the nut 50 so as not to obstruct the bolt shaft 61 of the bolt 60. The Even if the free end 72 is disposed at the center of the shaft 61 of the bolt 60, if the elasticity imparting portion 70 is formed of a wire, it can be moved to the left and right to avoid it. At this time, the free end portion 72 of the elasticity applying portion 70 is in contact with the nut 50 and the bolt shaft 61 of the bolt 60 with a predetermined frictional resistance.

  When not in use, the free end 72 of the elasticity applying portion 70 of this embodiment is rotated around the fastening rivet 14 and is accommodated in the notch guide portion 17. Therefore, in the normal state, the state shown in FIG. 3 and the state shown in FIG. 4, and further, the free end 72 of one elasticity applying portion 70 shown in FIG. Of course, as shown in FIG. 4, the free end portions 72 of the four elasticity imparting portions 70 may be accommodated in the notch guide portions 17.

The ratchet mechanism-equipped tightening device of the present embodiment configured as described above operates as follows.
The description will be made on the assumption that the nut 50 is screwed onto the bolt shaft 61 of the bolt 60 as shown in FIG. First, an example in which the ratchet mechanism fastening device of the present embodiment is used when the nut 50 is screwed into a predetermined position on the bolt shaft 61 of the bolt 60 will be described.
The hexagonal square hole 21 of the ratchet gear 2 is fitted to the outer periphery of the nut 50 in the direction of the bolt shaft 61 of the bolt 60. At this time, since the square hole 21 of the ratchet gear 2 is fitted in the direction parallel to the bolt shaft 61, the square hole 21 is moved in a direction perpendicular to the direction of the bolt shaft 61, and the gap between both is maximized. Fits smoothly.

  The fitting of the square hole 21 of the ratchet mechanism-clamping device of the present embodiment to the nut 50 is smoothly performed with the gap between them being reduced in resistance. The free end portion 72 of the elasticity applying portion 70 contacts the end surface of the nut 50. At this time, since the gripping part main body 1 is moved against the elasticity of the free end part 72 of the elasticity applying part 70, the elastic force of the free end part 72 of the elasticity applying part 70 moves as the gripping part main body 1 moves. . This feeling is felt by hand. In this state, when the gripper body 1 is at a right angle with respect to the bolt shaft 61 of the bolt 60, the square hole 21 is moved by the elastic force of the free end portion 72 of the elasticity applying portion 70.

  However, maintaining the gripper body 1 at a right angle with respect to the bolt shaft 61 of the bolt 60 requires unnecessary force, and from the experience of using a known spanner, wrench, etc., the gripper The main body 1 is moved upward by an angle α, or conversely, the main body 1 is moved downward by an angle β, and a state position without backlash is set as a home position. At this time, the square hole 2a of the ratchet gear 2 is in a state in which there is no backlash with the nut 50, and there is no backlash in the rotation angle. However, the elastic force of the free end portion 72 of the elasticity applying portion 70 is in the applied state. Here, when the gripping part body 1 is rotated in the right direction, the advancing flank becomes a frictional resistance obtained by applying the elastic force of the free end 72 of the elasticity applying part 70 to the normal frictional resistance. Even if the play side flank is in contact, the square hole of the gripping part main body is locked with the nut or the bolt head, so that the frictional resistance with the mating member can be increased.

  Therefore, when the advancing flank has a frictional resistance obtained by applying the elastic force of the free end portion 72 of the elasticity applying portion 70 to the normal frictional resistance in this way, the reverse of the nut 50 in that state. When a rotational force in the direction is applied, the frictional resistance of the screwing between the bolt shaft 61 of the bolt 60 and the nut 50 is large. Therefore, even if the gripping part body 1 is rotated, the nut 50 and the bolt shaft Reference numeral 61 denotes a fixed state. When the gripping part main body 1 rotates in the clockwise direction shown in the figure with respect to the ratchet gear 2, the frictional resistance of the engagement protrusion 42 is small. The ratchet gear 2 can be rotated rightward around the ratchet gear 2.

  Therefore, in one direction of rotation, the engagement protrusion 42 comes into contact with the outer peripheral gear 22 of the ratchet gear 2 by pressing the right rotation operation portion 4R. When the engagement protrusion 42 of the swing lever 4 is in contact with the outer peripheral gear 22 of the ratchet gear 2, the rotation of the ratchet gear 2 causes the engagement protrusion 42 to contact the outer peripheral gear 22 of the ratchet gear 2 on the surface. The grip body 1 and the ratchet gear 2 rotate together. However, when the gripper main body 1 and the right rotation direction shown in the drawing are rotated with respect to the ratchet gear 2, the inside of the engagement protrusion 42 gradually changes, so that the engagement protrusion 42 gradually moves around the mounting shaft 43. It rotates to the right and can freely rotate around the ratchet gear 2 in the right direction.

FIG. 6 omitting the ratchet mechanism is an example of another use state.
As shown in FIG. 6, description will be made on the assumption that a bolt shaft 61 of a bolt 60 is screwed onto a nut 50. First, in the case where the nut 50 is rotated to a predetermined position on the bolt shaft 61 of the bolt 60 and the two base materials 80 are tightened therebetween, the ratchet mechanism-equipped tightening device of the present embodiment is used. is there.
The center of the hexagonal square hole 21 of the ratchet gear 2 is fitted to the outer periphery of the bolt head 62 in the direction of the bolt shaft 61. At this time, since the square hole 21 of the ratchet gear 2 is fitted in the direction of the bolt shaft 61 of the bolt 60, it is moved in a direction perpendicular to the bolt shaft 61, and the gap between both is maximized. The square hole 21 is fitted smoothly.

  The square hole 21 of the ratchet mechanism-clamping device according to the present embodiment with respect to the bolt head 62 is smoothly fitted with a gap between them reduced in resistance. The free end 72 of the elasticity applying portion 70 abuts on the end surface of the bolt head 62. At this time, the gripping part main body 1 is moved against the elasticity of the free end part 72 of the elasticity applying part 70, and the elastic force of the free end part 72 of the elasticity applying part 70 is sensed by the hand moving the gripping part main body 1. . In this state, when the gripper body 1 is at a right angle with respect to the bolt shaft 61 of the bolt 60, the square hole 21 is moved by the elastic force of the free end portion 72 of the elasticity applying portion 70.

  However, trying to maintain the gripper body 1 at a right angle with respect to the shaft 61 of the bolt 60 requires useless force. As shown in FIG. 5, the grip body 1 is moved upward by an angle α, or conversely, is moved downward by an angle β. At this time, the square hole 21 of the ratchet gear 2 is not rattled with the nut 50. At this time, the elastic force of the free end portion 12 of the elasticity applying portion 10 is applied. Here, when the gripping part main body 1 is rotated in the right direction, the advance side flank becomes a resistance obtained by applying the elastic force of the free end 72 of the elasticity applying part 70 to the normal frictional resistance. Even if the play side flank is in contact, the square hole of the gripping part main body is locked with the nut or the bolt head, so that the frictional resistance with the mating member can be increased.

  As described above, when the advancing flank is a friction resistance obtained by applying the elastic force of the free end 72 of the elasticity applying portion 70 to the normal friction resistance, the bolt head 62 is reversed in this state. When the rotational force in the direction is applied, the frictional resistance of the screwing of the bolt head 62 is increased even if the grip portion main body 1 is rotated. Since the frictional resistance of the engaging projection 42 of the ratchet gear 2 is small with the bolt head 62 fixed, the bolt head 62 rotates rightward about the mounting shaft 43 and can rotate rightward around the ratchet gear 2. It becomes.

  Therefore, in one direction of rotation, the engagement protrusion 4b comes into contact with the outer peripheral gear 22 of the ratchet gear 2 by pressing the right rotation operation portion 4R. When the engagement protrusion 41 of the swing lever 4 is in contact with the outer peripheral gear 22 of the ratchet gear 2, the rotation of the ratchet gear 2 causes the engagement protrusion 42 to contact the outer peripheral gear 22 of the ratchet gear 2 on the surface. The grip body 1 and the ratchet gear 2 rotate together. However, when the gripping part main body 1 is rotated with respect to the ratchet gear 2 in the clockwise direction as shown in the figure, the inner side of the engagement protrusion 42 is formed in a substantially U shape so that the engagement protrusion 42 gradually Since it rotates to the right about the mounting shaft 43 and the frictional resistance is small, it can rotate around the ratchet gear 2 in the right direction.

The ratchet mechanism-clamping device according to the present embodiment accommodates the grip portion main body 1 that is gripped by the operator's hand and the nut 50 or the bolt head 62, and the relative rotation between the nut 50 or the bolt head 62. A ratchet gear 2 that is formed on the outer periphery of the gripper main body 1, and a tooth 22 on the outer periphery of the ratchet gear 2. The oscillating lever 4 that has engagement protrusions 41 and 42 that mesh and restrain the rotation of the ratchet gear 2 and can be switched to specify the position of the engagement protrusions 41 and 42 by the elastic contact of the spring 6. And the nut 50 or the bolt head 62 inserted into the square hole 21 of the ratchet gear 2 is attached to the gripper main body 1 so as to apply the axial elastic force of the nut 50 or the bolt 60 that presses the outer surface in the axial direction. With elasticity Those having a section 70.

  Therefore, the ratchet gear 2 in which the gear 22 is formed on the outer periphery rotatably disposed at the end of the gripper main body 1 is switched by the operator to the right rotation or the left rotation. The swing lever 4 determines the position of the engagement protrusions 41 and 42 that restrain the rotation of the ratchet gear 2 by elastic contact of an elastic body made of the spring 6 and determines the rotation direction of the ratchet gear 2. The nut 50 or the bolt head 62 is fitted into the hexagonal square hole 21 of the ratchet gear 2, and the gripper body 1 is gripped by the operator's hand. The square hole 21 of the ratchet gear 2 is the nut 50 or bolt head. 62 is rotated in a specific direction. At this time, the ratchet gear 2 is brought into contact with the engagement protrusions 41 and 42, and when the rotation of the ratchet gear 2 is restrained, the ratchet gear 2 rotates integrally with the grip portion main body 1. That is, the nut 50 or the bolt head 62 is rotated in the tightening direction by the rotation of the gripping body 1.

  Further, when the nut 50 or the bolt head 62 is rotated in the tightening direction, the opposite rotation applied to the gripping body 1 causes the square hole 21 of the ratchet gear 2 to rotate the nut 50 or the bolt head 62. Rotation in the opposite direction to the tightening direction. At this time, the position of the swing lever 4 set by the operator is such that the engagement protrusions 41 and 42 that are elastically contacted except for the rotation in the direction in which the elastic contact made of the spring 6 is tightened with the nut 50 or the bolt head 62 are arranged. Retracted by the elasticity, the ratchet gear 2 is rotated in the opposite direction of tightening the nut 50 or the bolt head 62. That is, the nut 50 or the bolt head 62 is in a state of being fitted into the square hole 21 of the ratchet gear 2, and the engagement protrusions 41, 42 engaged around the ratchet gear 2 are retracted due to its elasticity. The connection between the main part 1 and the nut 50 or the bolt head 62 is released.

  At this time, when the nut 50 or the bolt head 62 is in a predetermined tightening state and the frictional resistance between the two is large, the nut 50 or the bolt head 62 is rotated smoothly in the direction opposite to the direction in which the nut 50 or the bolt head 62 is rotated. Done. However, when the frictional resistance only in the direction opposite to the direction in which the nut 50 or the bolt head 62 is rotated and tightened is small, or the frictional resistance in the direction in which the nut 50 or the bolt head 62 is rotated and tightened is opposite to the direction of tightening. When the frictional resistance in the direction is small, the nut 50 or the bolt head 62 and the grip portion main body 1 are rotated, and it is difficult to tighten the bolt 50 and the nut 60 only by operating the grip portion main body 1.

  However, in the first embodiment of the present invention, the nut 50 inserted into the hexagonal square hole 21 of the ratchet gear 2 or the nut 50 of the ratchet gear 2 that presses one outer surface in the axial direction of the bolt head 62 or The elasticity applying portion 70 is attached so as to apply the elastic force in the axial direction of the bolt head 62. Due to the elasticity applying portion 70, the square hole 21 and the nut 50 or the bolt head 62 of the ratchet gear 2 attached to the gripping portion main body 1 are normally brought into contact with the gripping portion main body 1 and the nut 50 or the bolt head 62. The grip portion main body 1 is in contact with the nut 50 or the bolt head 62 over a wide area. However, the elasticity applying portion 70 that applies the elastic force in the axial direction of the nut 50 or the bolt head 62 of the ratchet gear 2 is an external force that presses the nut 50 or the bolt head 62 held by the square hole 21 of the ratchet gear 2. The nut 50 or the bolt head 62 is in contact with the advance flank of the male screw during the tightening in the relationship between the female screw and the male screw. Since the elastic force is given to the frictional resistance of the leading flank of the male screw, the frictional resistance with the mating member can be increased.

Therefore, even when the friction resistance in the direction opposite to the direction in which the nut 50 or the bolt head 62 is turned and tightened, and the friction resistance is small, the elasticity applying portion 70 exerts an elastic force on the nut 50 or the bolt head 62 in the axial direction. In addition, the frictional resistance for rotating the nut 50 or the bolt head 62 can be increased with a high probability.
Further, when the elasticity applying portion 70 applies an elastic force in the axial direction of the nut 50 or the bolt head 62, the elastic applying portion 70 does not uniformly apply an elastic force to the axial direction of the nut 50 or the bolt head 62, Since it is partially applied, the frictional resistance for rotating the nut 50 or the bolt head 62 can be increased with a high probability.
Therefore, the nut 50 or the bolt 60 to be tightened and the grip portion main body 1 are unlikely to rotate, and the ratchet mechanism tightening does not significantly increase the frictional resistance when the bolt 60 and the nut 50 are tightened. An attachment device can be provided.

The elasticity applying portion 70 according to the above embodiment applies the elastic force in the axial direction of the nut 50 or the bolt 60 and is attached so as to be rotatable with respect to the length direction of the grip portion main body 1. When the nut 50 or the bolt head 62 is fitted into the square hole 21 of the ratchet gear 2 depending on the storage state of the portion 70, the nut 70 or the bolt head 62 is inserted by receiving an elastic force to be in a fitted state. Since the engagement state of the head 62 with the square hole 21 of the ratchet gear 2 can be determined, the head 62 can be used without being aware of the magnitude of the elastic force of the elasticity applying portion 70.

Furthermore, since the free end 72 of the elasticity applying portion 70 of this embodiment is rotated around the fastening rivet 14 when not in use so as to be accommodated in the notch guide portion 17, in the normal retracted state, Both sides can be set in the state shown in FIG.
Further, since the free end portion 72 of the elasticity applying portion 70 of this embodiment is linear or spotted, the biasing force applied to the nut 50 or the bolt head 62 partially increases the frictional resistance. This is an easy-to-use ratchet mechanism fastening device.

[Embodiment 2]
Next, the ratchet mechanism-equipped tightening device according to the first embodiment of the present invention includes a gripper body 1 serving as a handle gripped by an operator's hand, two plate members 11 and 12 on the front and back in FIG. It is comprised from the core material 10 pinched | interposed into. However, since the square holes 21 that fit into the nut 50 or the bolt head 62 are not used at two places at the same time, the configuration of the elasticity applying portion 70 can be simplified.

7A and 7B are a plan view and a front view of the ratchet mechanism-clamping device according to the second embodiment of the present invention.
The elasticity applying portion 70, which is formed entirely of an elastic body, is made of a plate material. The elongated holes 75 a and the elongated holes 75 b of the main body 75 are formed by two mounting shafts 43 and the heads of one fastening rivet 14. It is held by the gripper body 1. This holding is movable along the length of the elongated hole 75a and the elongated hole 75b along the length direction of the grip portion main body 1.

  Both ends of the elasticity imparting portion 70 are a free end portion 76 and a free end portion 77 that are curved like a spoon. The free end portion 76 and the free end portion 77 are formed so that the end portion of the nut 50 or the bolt head 62 is elastically moved by the free end portion 76 or the free end portion 77 depending on whether the operation portion 78 is pushed rightward or leftward in FIG. Press with force. The operation portion 78 is obtained by bending the elasticity applying portion 70 made of a plate material into a substantially U shape. However, when carrying out the present invention, a circular hole is drilled in the main body portion 75, and a countersunk screw is provided there. Or the like so that the flat surface of the head of the countersunk screw and the surface of the main body 75 are flush with each other, and a handle is screwed onto the screw of the countersunk screw.

The elasticity applying portion 70 configured as described above is attached to the nut 50 or the bolt 60 in the direction of the bolt shaft 61 and to be movable forward and backward in parallel to the length direction of the gripping portion main body 1.
Therefore, the elastic force in the axial direction of the nut 50 or the bolt 60 is applied, and the nut 50 or the bolt 60 is attached so as to be able to advance and retreat in parallel with the length direction of the gripping body 1. When you do not use it, you will not feel uncomfortable. In use, if the nut 50 or the bolt head 62 is fitted into the square hole 21 of the ratchet gear 2, the elasticity applying portion 70 is used.
Therefore, the same effects as those of the first embodiment are obtained.

As described above, the elasticity applying portion 70 of the ratchet mechanism-clamping device according to the embodiment of the present invention applies the elastic force in the axial direction of the nut 50 or the bolt 60 and also in the length direction of the grip portion main body 1. Since it is attached so that it can move forward and backward in parallel, it only needs to be advanced and retracted as needed, so it does not feel uncomfortable when not in use. In use, if the nut 50 or the bolt head 62 is fitted into the square hole 21 of the ratchet gear 2, the elasticity applying portion 70 is used.

Also in the ratchet mechanism-clamping device of the present embodiment, the gripper body 1 gripped by the operator's hand, the nut 50 or the bolt head 62 is accommodated, and the relative rotation between the nut 50 or the bolt head 62 is accommodated. A square hole 21 for restraining movement is formed inside, a gear 22 is formed on the outer periphery, a ratchet gear 2 rotatably disposed at the end of the gripper body 1, and teeth 22 on the outer periphery of the ratchet gear 2. Engaging levers 41, 42 that restrain the rotation of the ratchet gear 2, and a swingable lever that can be switched to specify the position of the engaging protrusions 41, 42 by the elastic contact of the spring 6. 4, attached to the gripper body 1 so as to apply an elastic force in the axial direction of the nut 50 or bolt 60 presses the axial direction of the outer surface of the nut 50 or bolt head 62 inserted into the square hole 21 of the ratchet wheel 2 Those having a elasticity imparting unit 70.

[Embodiment 3]
In the first embodiment, the gripper body 1 is described as a linear device as the ratchet mechanism fastening device. However, when the present invention is implemented, the elasticity applying portion 70 of the first or second embodiment is used. As shown in FIG. 8, the handle can be used for an offset type ratchet wrench that is designed so that the both ends of the handle are angled so that the hand does not collide during work.
The elasticity applying unit 70 shown in FIG. 8 uses the elasticity applying unit 70 used in the first embodiment.
Since it overlaps with the first embodiment, a detailed description thereof is omitted, but one elasticity imparting portion 70 is on the outer convex side folded in a square shape, and the other is an inner concave portion folded in a square shape. In the first place, since the main body 73 of the elasticity applying portion 70 is greatly curved, connection is made within the curvature.

[Embodiment 4]
As for the free end part 72, the free end part 76, or the free end part 77 connected to the main body 73 of the elasticity applying part 70 of the above-described embodiment, the end part has a spoon shape, as shown in FIG. The tuning fork type free end portion 72a and free end portion 72b can be made into a bifurcated end portion.
Here, it is better to contact the end face of the nut 50 or the bolt head 62 in a single manner as in the free end 72, the free end 76 or the free end 77 at the end of the elasticity applying portion 70, or in two places. We compared whether it is better to contact with.

According to the inventor's experiment, when the outer surface of the nut 50 or the bolt head 62 and the inner surface of the square hole 21 of the ratchet gear 2 are rattled, the frictional resistance is larger when an external force is applied to only one place. There was a case where the frictional resistance was large when an external force was applied to some places. Furthermore, it was confirmed that when an external force is applied uniformly to the end face of the nut 50 or the bolt head 62, the frictional resistance does not increase so much. Therefore, the free end portion 72, the free end portion 76, or the free end portion 77 of the elasticity applying portion 70 that abuts against the nut 50 or the bolt head 62 is preferably one or two.
Therefore, as shown in FIG. 9, it can be set as the tuning fork type free end part 72a and free end part 72b which made the end part into two steps.

[Embodiment 5]
In each of the above embodiments, the elasticity applying portion 70 is formed by cutting a plate material into a predetermined shape, but it can be a wire having a specific thickness. Further, the elastic body can be a coil spring. The embodiment of FIG. 10 is an example.
The cap 90 includes an engaging portion 91 that fits the end portions of the front and back plate members 11 or 12 of the grip portion main body 1, and an engagement piece that is raised from the front and back plate members 11 or 12 of the grip portion main body 1 to be engaged. 18 is provided with an engaging projection 92 that engages with 18. And the coil spring 93 is provided in the position which opposes the square hole 21 of the ratchet gearwheel 2 in those engagement states. The coil spring 93 protrudes about 2 to 6 mm below the opening of the cap 90. The inner diameter of the coil spring 93 is formed larger than the diameter of the bolt shaft 61 of the bolt 60.

First, the lower end of the coil spring 93 is inserted into the square hole 21 of the ratchet gear 2, and the engaging convex portion 92 is engaged with the engaging piece 18 from the end portion side of the plate member 11 or the plate member 12 of the grip portion main body 1. At the same time, the engaging portion 91 is attached to the plate member 11 or the plate member 12 of the gripper main body 1 by fitting the end.
Here, when the square hole 21 of the ratchet gear 2 is fitted to the nut 50 or the bolt head 62 and the gripper body 1 is displaced in the axial direction of the nut 50 or the bolt 60, there is no rattling with the nut 50 or the bolt head 62. It becomes a contact state.

  That is, the ratchet mechanism-clamping device according to the fifth embodiment is fitted to the gripping body 1 serving as a handle gripped by the operator's hand, the nut 50 or the bolt head 62, and the nut 50 or the bolt. A ratchet gear 2 is formed inside the hexagonal square hole 21 that restrains relative rotation with the head 62, and the gear 22 is formed on the outer periphery thereof. 10 has engagement projections (corresponding to 41 and 42 in FIG. 1) not shown in FIG. 10 that mesh with the ratchet gear 2 and restrain the rotation of the ratchet gear 2. A swing lever (corresponding to 4 in FIG. 1) that can be switched by the operator's hand to identify the position of the elastic body (corresponding to 6 in FIG. 1) consisting of a spring 6 and a ratchet Nut 5 inserted into the square hole 21 of the gear 2 And those having a elasticity imparting unit 70 mounted in the axial direction of the outer surface to the nut 50 or bolt head 62 is pressed against the gripper body 1 so as to apply an elastic force in the axial direction of the bolt 60.

  In the ratchet mechanism-clamping device, the ratchet gear 2 having a gear 22 formed on the outer periphery thereof rotatably disposed at the end of the gripper body 1 is rotated by the operator in the right direction or left direction by the operator. The rotation can be switched freely. The swing lever 4 determines the position of the engagement protrusions 41 and 42 that restrain the rotation of the ratchet gear 2 by elastic contact of an elastic body made of the spring 6 and determines the rotation direction of the ratchet gear 2. The nut 50 or the bolt head 62 is fitted into the hexagonal square hole 21 of the ratchet gear 2, and the grip portion main body 1 is gripped by the operator's hand, and the square hole 21 of the ratchet gear 2 is in the nut 50 or bolt head 62. Is rotated in a specific direction. At this time, the ratchet gear 2 abuts on the engagement protrusions 41 and 42, restrains the rotation of the ratchet gear 2, and rotates integrally with the gripper main body 1. That is, the nut 50 or the bolt head 62 is rotated in the tightening direction by the rotation of the gripping body 1.

  Further, the rotation in the opposite direction applied to the gripper main body 1 is the rotation in the direction opposite to the direction in which the square hole 21 of the ratchet gear 2 rotates and tightens the nut 50 or the bolt head 62. At this time, the position of the swing lever 4 set by the operator is such that the engagement protrusions 41 and 42 that are elastically contacted except for the rotation in the direction in which the elastic contact made of the spring 6 is tightened with the nut 50 or the bolt head 62 are arranged. Retracted by the elasticity, the ratchet gear 2 is rotated in the opposite direction of tightening the nut 50 or the bolt head 62. That is, the nut 50 or the bolt head 62 is in a state of being fitted into the square hole 21 of the ratchet gear 2, and the engagement protrusions 41, 42 engaged around the ratchet gear 2 are retracted due to its elasticity. The connection between the main part 1 and the nut 50 or the bolt head 62 is released.

  At this time, when the nut 50 or the bolt head 62 is in a predetermined tightening state and the frictional resistance therebetween is large, the nut 50 or the bolt head 62 is rotated smoothly in the direction opposite to the direction in which the nut 50 or the bolt head 62 is rotated. Is called. However, when the frictional resistance only in the direction opposite to the direction in which the nut 50 or the bolt head 62 is rotated and tightened is small, or the frictional resistance in the direction in which the nut 50 or the bolt head 62 is rotated and tightened is opposite to the direction of tightening. When the frictional resistance in the direction is small, the nut 50 or the bolt head 62 and the grip portion main body 1 are rotated, making it difficult to tighten the bolt 60 and the nut 50.

  However, in the above embodiment, the nut 50 or the bolt head 62 of the ratchet gear 2 that presses one of the outer surfaces in the axial direction of the nut 50 or the bolt head 62 inserted into the hexagonal square hole 21 of the ratchet gear 2. The elasticity applying portion 70 is attached so as to apply the axial elastic force. Due to the elasticity applying portion 70, the square hole 21 and the nut 50 or the bolt head 62 of the ratchet gear 2 attached to the gripping portion main body 1 are normally brought into contact with the gripping portion main body 1 and the nut 50 or the bolt head 62. The grip portion main body 1 is integrated with the nut 50 or the bolt head 62. However, the elasticity applying portion 70 that applies the elastic force in the axial direction of the nut 50 or the bolt head 62 of the ratchet gear 2 is an external force that presses the nut 50 or the bolt head 62 held by the square hole 21 of the ratchet gear 2. The nut 50 or the bolt head 62 is in contact with the advance flank of the male screw during the tightening in the relationship between the female screw and the male screw. Since the elastic force is given to the frictional resistance of the leading flank of the male screw, the frictional resistance with the mating member can be increased.

Therefore, even when the frictional resistance in the direction opposite to the direction in which the nut 50 or the bolt head 62 is rotated and tightened is small, the elasticity applying portion 70 applies an elastic force to the nut 50 or the bolt head 62 in the axial direction. Therefore, the frictional resistance for rotating the nut 50 or the bolt head 62 can be increased with a high probability.
Therefore, the nut 50 or the bolt 60 to be tightened and the grip portion main body 1 are unlikely to rotate, and the ratchet mechanism tightening does not significantly increase the frictional resistance when the bolt 60 and the nut 50 are tightened. An attachment device can be provided.

Here, the said grip part main body 1 is a handle | steering-wheel part hold | gripped by an operator's hand, The length is determined by the nut 50 or the bolt head 62 to handle.
Further, the ratchet gear 2 is rotatably disposed at one or both ends of the gripper body 1, and accepts the insertion of the nut 50 or the bolt head 60 in this state, and the nut 50 or the bolt head 60. A square hole 21 that fits into a nut 50 or a bolt head 60 that allows or restrains relative rotation is formed inside, and a gear is formed on the outer periphery.

The swing lever 4 has engagement protrusions 41 and 42 that mesh with the teeth 22 of the ratchet gear 2 and restrict the rotation of the ratchet gear 2. The switch can be freely made by the operator's hand to specify the contact.
Further, the elasticity applying portion 70 applies an elastic force in a perpendicular direction to the grip portion main body 1 that presses the outer surface in the axial direction of the nut 50 or the bolt head 62 inserted into the square hole 21 of the ratchet gear 2. It is attached to.

The free ends 72, 72a, 72b are formed in a spoon shape, but when the present invention is carried out, they may be formed in a V-shaped section, a U-shaped section, or a simple flat plate. However, it is more effective that the area contacting the end face of the nut 50 or the bolt head 60 is smaller.
Moreover, since the elasticity provision part 70 of this Embodiment uses the two fastening rivets 14 which wrench, such as the conventional ratchet wrench and spectacles wrench, has, the change of the specification from the former is slight. .

DESCRIPTION OF SYMBOLS 1 Grasping part main body 14 Clamping rivet 2 Ratchet gear 21 Square hole 4 Swing lever 4L Left rotation operation part 4R Right rotation operation part 41, 42 Engagement protrusion 5 Ball 6 Spring 50 Nut 60 Bolt 61 Shaft 62 Bolt head 70 Elasticity provision Part 71 Fixing part 72, 72a, 72b Free end part

Claims (3)

A gripper body gripped by an operator;
A nut or bolt head is accommodated, a square hole is formed inside to restrain relative rotation with the nut or bolt head, a gear is formed on the outer periphery, and the end of the gripper body is turned. A freely arranged ratchet gear,
An oscillating lever that meshes with the teeth on the outer periphery of the ratchet gear, has an engaging projection that restrains the rotation of the ratchet gear, and is switchable to specify the position of the engaging projection by elastic contact of an elastic body;
Elasticity attached to the gripper main body so as to apply an axial elastic force of the nut or the bolt that presses an axial outer surface of the nut or the bolt head inserted into the square hole of the ratchet gear. And a ratchet mechanism fastening device. The said elasticity provision part was supported by the axial direction of the said nut or the said volt | bolt, and was rotatably supported with respect to the length direction of the said holding | maintenance part main body. Fastening device with ratchet mechanism. 2. The elasticity applying portion is configured to apply an elastic force in an axial direction of the nut or the bolt and to be movable in a movable manner in parallel with a length direction of the gripping portion main body. The tightening device with the ratchet mechanism described.

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