JP5027329B1 - Wrench with multiple handles - Google Patents

Abstract

【Task】 If the nut is loosened and removed from the bolt, the bolt or nut is rusted, or the exposed end of the bolt is painted and the thread groove is buried in the paint, etc., it will be difficult to remove the nut. A ratchet wrench that allows the bolt to be firmly fixed to remove the nut when it occurs, and that the work can be done alone even when the work is difficult.
A gear is engraved on the outer periphery of a head member having a socket for fitting a bolt head or a nut, and a plurality of head portions are respectively rotated around the head member using the head member as a support shaft. Each head portion is engaged with a ratchet mechanism that regulates the rotation direction with a gear on the outer periphery of the head member, and a handle is provided continuously. Each of them is fitted with a substantially conical wedge piece so as to be slidable.
[Selection] Figure 3

Description

In the present invention, when tightening or loosening bolts and nuts with a wrench or the like, especially when the nuts are loosened and removed from the bolts, the bolts or nuts are rusted, or the tips exposed from the nuts of the bolts are painted. The present invention relates to a ratchet wrench that can firmly fix a bolt for removing a nut when it is difficult to remove the nut, such as when the thread groove portion is buried in a paint due to the above.

Furthermore, even if it is difficult for one operator to fit the wrench to the bolt head and nut, the ratchet wrench allows the bolt and nut to be tightened or loosened by one person by fixing the bolt head firmly. It is about.

In the conventional ratchet wrench, when the nut is loosened from the bolt, if the nut is loosened slightly, a gap is formed between the fastened member and the bolt and the nut, and the rotation of the bolt and the nut occurs. In particular, when the bolt or nut is rusted, or when the screw portion of the bolt is filled with paint, it is necessary to firmly fix the bolt head and loosen the nut with a large force.

  Furthermore, if the bolt head is blocked by the fastening member and the like, and the worker cannot fit the wrench to the bolt head and nut by one person, an operator for fixing the bolt head is required, which is a two-person operation. .

To solve the above problems, the spanner with a ratchet wrench in Patent Document 1 as a wrench having a plurality of handles, swingably support arm is attached to the ratchet ring of the ratchet wrench head, said support arm This is a combination of a spanner and a ratchet wrench provided with a support shaft and mounted with a wrench displaceable through the support shaft. One (ratchet wrench) is fitted to the bolt head and the other (spanner) is fitted to the nut so as to be sandwiched between the fastening members , and the ratchet wrench is swung while holding the spanner to tighten the bolt. Can do

Furthermore, in order to prevent the rotation of the bolt and the nut, the bolt / nut rotation prevention device of Patent Document 2 is provided with a socket portion for fitting the bolt head and the outer peripheral surface of the socket portion. Arm part and magnet provided on the arm part, with the socket part fitted to the bolt head part, the arm part is the nearest obstacle (other bolt head part or angle material, etc.) The nut is tightened with a wrench or the like in a state where the nut is brought into contact with and locked to the member to be fastened by a magnet.

However, in patent document 1 , it is restricted to what can clamp a to-be-fastened member in a spanner part and a ratchet wrench part, the to-be-fastened member is thick, and the attachment position of a bolt is greatly separated from the to-be-fastened member end part. It cannot be used for things that cannot be sandwiched between the spanner part and the ratchet wrench part, and is a tool exclusively for tilling claws such as a rotary.

Furthermore, in Patent Document 2 , the bolt is fixed (longitudinal direction) only by the magnet's attracting force, and when the nut is loosened to some extent, the bolt is rattled and the arm can be removed from the place where the arm is abutted and locked. Disappear. In particular, if the bolt or nut cannot be turned easily due to rust or paint adhesion, it is necessary to turn the nut with a strong force. Therefore, it is necessary to fix the bolt firmly. Bolts cannot be fixed to the door, and it is impossible to reliably prevent the rotation.

JP 09-136265 A JP 2009-034733 A

In view of the drawbacks of the prior art described above, the wrench of the present invention can prevent the rotation of the bolt and the nut by firmly fixing the bolt, and can work alone even if the worker is difficult to work. .

  Incidentally, the conventional ratchet wrench is a wrench having a square drive for mounting a socket at the end or a ratchet mechanism with a socket projecting, and the swinging operation of the ratchet wrench is the first to tighten the wrench. Rotation operation of the wrench from the start position to the end position after the tightening operation, and the swing return operation is a rotation operation from the end position to the original start position.

A gear is engraved on the outer periphery of the head member having a socket for fitting the bolt head or nut, or a means for mounting the socket for fitting the bolt head or nut. The head member has a plurality of head portions rotatably supported around the head member as a support shaft, and each head portion has a ratchet mechanism that restricts the rotation direction to the outer peripheral gear of the head member. There are engaged, it is even more respective head Ri Contact handle for the operation are continuously provided, respectively in the said handle slidably Ryakukiri-like wedge piece fitted The feature.

When the nut is loosened when the bolt and nut are firmly fixed and rotation occurs, this wrench is fitted to the bolt head and the multiple handles (wedge pieces) of this wrench are brought into contact with the member to be fastened. By making a triangle with the three points of the corresponding contact part and the through-hole part of the tightened member of the bolt and fixing the bolt firmly, even if the nut is rotated with another wrench with strong force, Absent. The other wrench is a conventional ratchet wrench, monkey wrench or spanner other than the wrench of the present invention.

  Furthermore, even when the bolt head is blocked by a member to be fastened and the operator cannot fit the wrench to the bolt head and the nut alone, by fixing the bolt as described above, one person can work. .

It is the perspective view which shows the wrench which has several handles of 1st Example, a front view, and a top view . It is a perspective view which shows the wrench which has several handles of 2nd Example. It is the perspective view which shows the wrench which has several handles of 3rd Example, a front view, and a top view. It is a perspective view which shows the wrench which has several handles of 4th Example. It is a perspective view which shows a wedge piece. It is operation | movement explanatory drawing accompanying switching of the switching lever of a ratchet mechanism. It is the front view which shows the fixing method of a volt | bolt for the rotation prevention of a volt | bolt and a nut using the wrench which has several handles of 3rd Example, a top view, and a side view. FIG. 8 is a front view, a plan view, and a side view showing a bolt fixing method different from FIG. 7 in order to prevent rotation of the bolt and nut by using a wrench having a plurality of handles according to the third embodiment. . It is the perspective view which shows the wrench which has several handles, a cross-sectional view, and a longitudinal cross-sectional view. It is a perspective view which shows the wrench which has the some handle | steering_wheel which the angular drive protruded in the head part. It is operation | movement explanatory drawing when tightening operation of a volt | bolt was performed using the wrench which has several handles .

  Embodiments of the present invention will be described in detail with reference to the drawings. In addition, a cross-sectional view is a cross-sectional view seen from the front (front side), and a vertical cross-sectional view is a cross-sectional view seen from the top. The positional relationship in the following description is described based on the positions shown in the drawings.

The wrench 100 having a plurality of handles will be described in detail with reference to FIG. As shown in the figure, a first ratchet wrench portion 110 having a head portion 1 at the left end and a handle 3 integrally therewith, and a head portion 2 at the left end of the same structure as the first ratchet wrench portion 110, followed by a handle. 4 is composed of a second ratchet wrench portion 120 that is integrally provided. Head members 12 and 22 having an integral structure are axially passed through the respective head portions 1 and 2, and the first ratchet wrench portion 110 and the second ratchet wrench portion 120 respectively use the head members 12 and 22 as support shafts. It is installed so that it can rotate freely.

  The head members 12 and 22 are gear bodies having gears on the outer periphery, and the first ratchet wrench portion 110 is engaged with the gear portion of the head member 12 by the switching lever 13 of the ratchet mechanism from the handle 3 side. The switching lever 13 of the ratchet mechanism is pressed by the ball 16 by the elastic force of the spring 15 and is pivotally supported by the head portion 1 by the support shaft 14. Further, the operation portion of the switching lever 13 protrudes from the gaps on both side surfaces of the head portion 1, and the switching lever 13 rotates by pushing the operation portion of the switching lever 13 to switch the ratchet mechanism. It is something that can be done. Similarly, in the second ratchet wrench portion 120, the switching lever 23 of the ratchet mechanism is engaged with the gear portion of the head member 22 from the handle 4 side, and the switching lever 23 of the ratchet mechanism is moved by the ball 26 by the elastic force of the spring 25. It is pressed and is pivotally supported on the head portion 2 by a support shaft 24 so as to be rotatable.

Further, a socket 11 for fitting a bolt head or a nut is provided on the head member 12 so as to protrude from the upper surface of the head portion 1. Similarly, a socket 21 is provided on the head member 22 so as to protrude from the lower surface of the head portion 2. As described above, the wrench having a plurality of handles has two conventional ratchet wrench head members fixed to each other and stacked in a swingable manner.

Next, the operation of the wrench 100 having a plurality of handles will be described. 11 , the head of the bolt 700 is fitted into the socket 21 of the second ratchet wrench 120, and the handle 3 of the first ratchet wrench 110 is swung in the direction of the arrow a1, and at the same time, the second ratchet wrench 120 The handle 4 is swung in the direction of the arrow b2 opposite to the first ratchet wrench portion 110. At this time, as shown in FIG. 6A, the switching lever 13 and switching lever 23 of the ratchet switching mechanism rotate the handle 3 in the direction of arrow R1, and the head member 12 rotates in the direction of arrow r. When the handle 4 is swung in the direction of arrow R2, the head member 12 rotates in the direction of arrow r. When the handle 3 is swung in the direction of arrow L1, only the handle 3 circulates around the head member 12 and the head member 12 does not rotate. Similarly, if the handle 4 is swung in the direction of arrow L2, the handle 4 Only the head member 22 circulates and the head member 22 is in a switching position where it does not rotate. Since the head member 12 and the head member 21 are integrally formed, the bolt 700 is rotated in the direction of the arrow r by the swinging operation of the handle 3 in the direction of the arrow a1, and the swinging of the handle 4 in the direction of the arrow b2 is restored. For the operation, only the handle 4 goes around the head member 22. Next, from the position where the first ratchet wrench part 110 and the second ratchet wrench part 120 in FIG. 11 are switched, the bolt 700 is rotated in the arrow r direction by the swinging operation of the handle 4 in the arrow b1 direction. Only the handle 3 circulates the head member 12 with respect to the swing return operation in the direction of the arrow a2 in FIG.

As described above, by alternately swinging and returning the handle 3 and the handle 4, the bolt 700 can be always rotated and tightened during the operation, so that a quick tightening operation can be performed. It should be noted that the same effect can be obtained when the bolt is loosened.

For example, when a bolt is tightened in a state where there is almost no rotational resistance between the bolt and the nut, the bolt or nut is loosened by the swing return angle when the swing return operation is performed in the conventional ratchet wrench . A) Reference) When the handle 3 of the first ratchet wrench portion 110 is swung in the direction of the arrow R1, and the swing back operation is performed in the direction of the arrow L1, the second ratchet wrench portion 120 (in this example, it is not operated and remains stationary). The head members 12 and 22 are prevented from rotating in the direction opposite to the direction indicated by the arrow r due to the action of the ratchet mechanism (switching lever 23). The same applies when the bolt is loosened. Of course, even if the first ratchet wrench portion 110 and the second ratchet wrench portion 120 are alternately operated, one of the head members 12 and 22 is always in a state of being prevented from rotating in the direction opposite to the arrow r direction. Therefore, the bolt or nut will not loosen.

In the wrench 100 having a plurality of handles shown in FIG. 9, the handle 3 of the first ratchet wrench portion 310 is a cylindrical portion 32 on the head portion 1 side, followed by a regular square pole portion in the wrench 300 of the first embodiment shown in FIG. 31, a substantially hemispherical stopper 33 for preventing the wedge piece 5 (described later) from falling off is screwed by a bolt 34 at the end, and a clamp 7 for preventing the wrench from falling off is connected to the wire. 71 is connected to the stopper 33. Similarly, the handle 4 of the second ratchet wrench portion 320 has the same structure. The second ratchet wrench portion 320 is not provided with the clamp 7 for preventing the dropout.

A wedge piece 5 and a wedge piece 6 are externally fitted to the handle 3 and the handle 4 so as to be slidable. The wedge pieces 5 and 6 have a substantially pyramid shape with a square cross section, and a hole for penetrating the handles 3 and 4 is formed in the center. The base end portion is on the head portion side and the pointed end portion is on the stopper side. It is fitted. The wedge pieces 5 and 6 cannot be rotated at the positions of the regular quadrangular column portions 31 and 41 of the handles 3 and 4 but can be slid and rotated at the positions of the cylindrical portions 32 and 42. The stoppers 33 and 43 prevent the handle pieces 3 and 6 from falling off when the wedge pieces 5 and 6 are slid. Further, the bolts 34 and 44 are loosened, the stoppers 33 and 43 are removed, and the existing wedge pieces 5 are removed. , 6 can be extracted and replaced with another wedge piece (see FIG. 5 ). Hereinafter, the wrench having a plurality of handles of the first embodiment will be referred to as the wrench of the first embodiment, and the same applies to the wrench attached to the second and subsequent embodiments.

FIG. 2 shows a wrench 400 according to the second embodiment . The difference from the wrench 300 of the first embodiment is that the handle 3 and the handle 4 are all made of a cylindrical body, and the wedge pieces 5 and 6 fitted on the handles 3 and 4 are substantially conical. It will be.

FIG. 3 shows a wrench 500 of the third embodiment . The difference from the wrench 300 of the first embodiment is that the handle 3 is bent toward the second ratchet wrench portion 520 and the handle 4 is bent toward the first ratchet wrench portion 510 side. 3 and the handle 4 are juxtaposed at the same position in the middle of the first ratchet wrench portion 510 and the second ratchet wrench portion 520, so that the distance from the upper or lower side of the wrench 500 to the wedge piece 5 and the wedge piece 6 can be increased. They are the same (see FIG. 3B ).

Next, the operation of the wrench 500 of the third embodiment will be described. From FIG. 7 , L-shaped fastened members 810-1 and 810-2 are attached to a flat plate-like fastened member 800 by bolts 700 and nuts 710. An operation example for removing the bolt 700 and the nut 710 will be described. In the state where the socket 21 of the second ratchet wrench portion 520 is fitted to the head of the bolt 700 and the first ratchet wrench portion 510 and the second ratchet wrench portion 520 are opened in a substantially C shape, the first ratchet wrench portion 510 The tip of the handle 3 is swung in the direction of the arrow C1 to the position closest to the fastened member 810-2. Similarly, the tip end portion of the handle 4 of the second ratchet wrench portion 520 is also swung in the direction of the arrow C2 to the position closest to the fastened member 810-2. Thereafter, the wedge piece 5 is slid from the base of the handle 3 in the direction of the tip (arrow e1 direction), and the wedge piece 5 is brought into contact with the fastened member 810-2. Similarly, the wedge piece 6 is moved from the base of the handle 4. It slides in the tip direction (arrow e2 direction) and is brought into contact with the fastened member 810-2. By the above operation, the bolt 700 is supported and fixed by the three points of the contact part g1 of the wedge piece 5, the contact part g2 of the wedge piece 6, the fastened member 800, and the through part g3 of the bolt 700 of the fastened member 810-1. . In addition, a bolt can be fixed more firmly by sliding the wedge pieces 5 and 6 by hitting with a hammer or the like.

  After the bolt 700 is fixed by the main wrench 500, the clamp 7 is sandwiched between the fastened members 810-2 and the like to prevent the main wrench 500 from falling when the fixing of the main wrench 500 is released (not shown). Thereafter, another wrench is fitted to the nut, the nut 710 is loosened (not shown), and the bolt 700 is removed.

When the above operation is performed, the switching position of the switching levers 13 and 23 of the ratchet mechanism of the first ratchet wrench part 510 and the second ratchet wrench part 520 is the position where the first ratchet wrench part 510 can swing in the direction of the arrow C1. However, the second ratchet wrench portion 520 is a position that can be swung in the direction of the arrow C2, but is a position that cannot be swung in the direction d2. Specifically, as shown in FIG. 6B , when the handle 3 is swung in the direction of arrow L1, the head member 12 is swung in the direction in which the rotational force in the direction of arrow s is generated, and when the handle 4 is swung in the direction of arrow R2. The head member 22 is switched to the direction in which the rotational force in the direction of arrow r is generated. At this time, when the handle 4 is held and fixed, if the handle 3 is swung in the direction of the arrow L1, the head member 12 generates a rotational force in the direction of the arrow s. However, since the head member 12 and the head member 22 are integrated, the handle The rotation force 3 is caused by the action of the switching lever 23 so that the rotation of the head member 22 in the direction opposite to the direction of the arrow r (the direction of the arrow s in the head member 12) is blocked. I can't. Similarly, when the handle 4 is held and fixed, if the handle 4 is swung in the direction of the arrow R2, the head member 22 generates a rotational force in the direction of the arrow r, but the rotational force of the handle 4 is caused by the action of the switching lever 13. Since the rotation in the direction opposite to the arrow r direction is blocked, the handle 4 cannot be swung in the arrow R2 direction. However, for the swinging of the handle 3 in the direction of the arrow R1 and the handle 4 in the direction of the arrow L2, the head members 12 and 22 remain stationary and the handle 3 circulates in the direction of the arrow R1 of the head member 12, The handle 4 can go around the head member 22 in the direction of the arrow L2.

Another operation example will be described. As shown in FIG. 8 , L-shaped fastened members 810-1 and 810-2 are attached to a flat fastened member 800 by bolts 700 and nuts 710. When removing the bolt 700 and the nut 710, the socket 11 of the first ratchet wrench portion 510 is fitted to the head of the bolt 700, and the first ratchet wrench portion 510 and the second ratchet wrench portion 520 are formed in a substantially inverted H-shape. In the opened state, the swinging operation is performed to the position of the upper end of the fastened member 800 with the tips of both the handles 3 and 4. Thereafter, the wedge piece 51 is slid in the base direction (the direction of the arrow e1) from the distal end portion of the handle 3, and the wedge piece 51 is brought into contact with the upper end portion of the fastened member 800. Similarly, the wedge piece 61 is placed at the distal end of the handle 4. It slides in the base direction (the direction of arrow e2) from the portion and is brought into contact with the upper end portion of the fastened member 800. By the above operation, the bolt 700 is supported and fixed by the three points of the contact part g1 of the wedge piece 51, the contact part g2 of the wedge piece 61, the fastened member 800, and the through part g3 of the bolt 700 of the fastened member 810-1. . Thereafter, another wrench or spanner or the like is fitted to the nut, the nut 710 is loosened, and the bolt 700 is removed. The switching positions of the switching levers 13 and 23 of the ratchet mechanism are positions where the first ratchet wrench portion 510 can swing in the direction of arrow C1 and the second ratchet wrench portion 520 can swing in the direction of arrow C2.

The wedge pieces 51 and 61 have a cylindrical body projecting from one side surface of a substantially pyramid shape having a square cross section, and the lower surface of the cylindrical body is in contact with the upper end portion of the fastened member 800. Further, the other wedge pieces 52 and 62 are substantially pyramids having a rectangular cross section, and by rotating the wedge pieces 52 and 62 by the cylindrical portions 32 and 42 of the handles 3 and 4, a more appropriate contact portion can be obtained. (See FIG. 5 ). As described above, it is possible to fix the bolt more firmly and stably by selecting from various wedge pieces for the handle of the wrench and exchanging with a more appropriate wedge piece.

  Further, since the handle 3 is bent toward the second ratchet wrench portion 520 and the handle 4 is bent toward the first ratchet wrench portion 510, the distance between the fastened member and both wedge pieces is equalized. The wedge pieces can have the same shape, and the bolt can be more stably fixed.

FIG. 4 shows a wrench 600 of the fourth embodiment . The difference from the wrench 500 of the third embodiment is that the handles 3 and 4 are all cylindrical bodies, and the wedge pieces 5 and 6 are also substantially conical bodies.

In addition, in Example 1 , since the distance between the member to be fastened and the wedge pieces is different, the structure is simple although it may be unstable compared to Example 3 depending on the shape of the member to be fastened. In addition, since the handle of the second embodiment is a cylindrical body, the structure is simple and easy to manufacture. The operating methods of the first embodiment, the second embodiment, and the fourth embodiment are the same as those of the third embodiment .

  Even if the bolt and nut are rusted or firmly attached to the bolt with paint, the nut will be loosened and removed from the bolt. The nut can be easily removed from the bolt by firmly fixing the bolt with the three points of the abutting portion of the wedge piece and the fastened member and the bolt penetration portion of the fastened member.

  Furthermore, even in situations where the operator cannot fix the bolts and tighten or loosen the nuts, the wrench can fix the bolts in the same way as described above, so that even if the work is difficult, the wrench can work alone. Because it is simple, it is robust and can be easily manufactured.

Also, if the wedge piece is removed from both handles and used as a wrench having a plurality of handles, the conventional ratchet wrench cannot tighten (loosen) the bolt or nut during the swing return operation, resulting in work loss. In this wrench, the bolts or nuts can be always tightened (loosened) by alternately swinging the plurality of handles, so that the work is completed in a short time without any work loss. Furthermore, if there is no rotation resistance between the bolt and nut, if the swing return operation is performed, the bolt or nut may loosen by the swing return angle, but the first ratchet wrench part and the second ratchet wrench part of each ratchet mechanism Due to the action, the bolt or nut does not loosen even when the swinging return operation is performed.

In addition, although the ratchet mechanism of this wrench shown in the embodiment is described as a claw type switching mechanism, the ratchet mechanism is similar to a known ratchet mechanism, and the ratchet mechanism is limited to the claw type switching mechanism. Instead, a pinch switching mechanism or other switching mechanism may be used as long as it is a ratchet mechanism that performs the function of this wrench. Moreover, the conventional ratchet wrench is a wrench having a square drive for mounting a socket at an end or a ratchet mechanism having a socket projecting therefrom.

1, 2 Head
3, 4 Handle 5, 6, 51, 52, 61, 62 Wedge piece 7 Clamp 11, 21 Socket 12, 22 Head member 13, 23 Switching lever 33, 43 Stopper 100 Angular drive to the head part of wrench 200 having a plurality of handles A wrench having a plurality of handles protruding from the wrench 300 A wrench having a plurality of handles of the first embodiment 400 A wrench having a plurality of handles of the second embodiment 500 A wrench having a plurality of handles of the third embodiment 600 Fourth Wrench having a plurality of handles of the embodiments 110, 210, 310, 410, 510, 610 First ratchet wrench portion 120, 220, 320, 420, 520, 620 Second ratchet wrench portion 700 Bolt 710 Nut 800 Flat plate fastened Member 810-1, 810-2 L-shaped member to be fastened

Claims (1)

A gear is engraved on the outer periphery of the head member having a socket for fitting the bolt head or nut, or a means for mounting the socket for fitting the bolt head or nut. The head member has a plurality of head portions rotatably supported around the head member as a support shaft, and each head portion has a ratchet mechanism that restricts the rotation direction to the outer peripheral gear of the head member. There are engaged, it is even more respective head Ri Contact handle for the operation are continuously provided, respectively in the said handle slidably Ryakukiri-like wedge piece fitted A wrench having a plurality of handles characterized by