JP5408637B1 - Claw wheel type open end wrench - Google Patents

Abstract

An object of the present invention is to provide an open end wrench that can be used in a narrow working environment and can be easily manufactured.
A main body including a handle portion, at least one head portion, and a fixed jaw, the head portion being connected to one end of the handle portion, and a fixed jaw extending from the head portion; At least one coupling arm 21 and a universal jaw 22 are provided, and the coupling arm 21 is in contact with the head portion 12, whereby the working unit 2 in which an opening is formed from the universal jaw 22 and the fixed jaw 13; A slide groove 31 and a slide part, the slide groove 31 is formed in one of the head part 12 and the coupling arm 21, and the slide part is fixed to the head part 12 and the remainder of the coupling arm 21; The slide unit is slidably provided in the slide groove 31, and the slide unit has a cross-sectional shape that does not exhibit a circular shape; the slide unit 3 is disposed between the main body 1 and the work unit 2, and the work unit 2 is the first. Including; an elastic member 4 is biased to the location.
[Selection] Figure 2

Description

  The present invention relates to an open end wrench, and more particularly to a claw wheel type open end wrench.

  For example, the invention disclosed in Patent Document 1 has been proposed as a conventional ratchet type open-end wrench. This open-ended wrench is equipped with a fixed jaw and a slidable free jaw on the open-end wrench, and is further provided with an elastic tool, which allows the user to reciprocate the open-ended wrench in a reciprocating manner. The universal jaw is slid with respect to the fixed jaw to open and close, the fastener can be rotated in only one direction, and the fastener can be screwed or loosened. is there.

  However, such a claw wheel type open-end wrench is inconvenient to use in a narrow work environment. Since the direction of movement of the universal jaw is simply away from the fixed jaw and further away from the handle portion of the claw wheel type open-end wrench, the fastener cannot be released unless the movement distance of the universal jaw is large. As a result, such a claw wheel type open-end wrench is used in a narrow work environment, and thus the universal jaw is likely to be blocked by another obstacle, and thus the fastener cannot be released. The tool cannot be rotated in only one direction.

  In order to solve the above problems, the inventions described in Patent Document 2, Patent Document 3, and Patent Document 4 have been proposed. With these proposals, an open-end wrench can be used in a narrow work environment, and the open-end wrench can be swung back and forth. The invention described in Patent Document 2 is similar to the invention described in Patent Document 4, and the free jaw can be slid by the pin and the stereotactic hole having an arc shape, and also exhibits the arc shape of the free jaw. The sliding path of the universal jaw is regulated by the surface, and arbitrary rotation of the universal jaw can be prevented. In the invention described in Patent Document 3, the free jaw can be slid by the pin and the stereotaxic hole, and the free jaw and the fixed jaw are brought into contact with each other by the arc-shaped edges. The sliding path of the jaw is restricted, and arbitrary rotation of the universal jaw can be prevented. Any of the above open-end wrench can be used in a narrow working environment, and is therefore favored by consumers.

  However, the open-end wrench described above is difficult to manufacture, that is, it is necessary to mold the part into a special shape, and in particular, the groove has a surface with an arc shape, The universal jaw can be held in a predetermined path, but these surfaces are difficult to machine. For example, the wrench described in Patent Document 4 requires an arc-shaped surface inside the opening, and a machining tool such as a milling cutter cannot enter the opening, so that the machining operation is difficult.

  In order to produce such a wrench, it is necessary to employ precision casting. However, in the case of producing parts of a wrench by precision casting, the structural strength and surface accuracy are lowered. When the structural strength is reduced, the wrench is easily broken, and when the surface accuracy is reduced, the free jaw cannot be moved smoothly. On the other hand, the use of precision casting increases production costs.

U.S. Pat. No. 4,637,284 US Pat. No. 5,287,777 US Pat. No. 5,582,082 US Pat. No. 7,827,887

  Accordingly, a main object of the present invention is to provide a claw type open-end wrench that can be used in a narrow working environment and can be easily manufactured.

  According to the toothed wheel type open-end wrench of the present invention, the main body includes a handle portion, at least one head portion, and a fixed jaw, the head portion is connected to one end of the handle portion, and the fixed jaw extends from the head portion. , Comprising at least one coupling arm and a universal jaw, the coupling arm being in contact with the head part, whereby a working part in which an opening is formed from the universal jaw and the fixed jaw, a slide groove, and a slide And a slide groove is formed in one of the head part and the coupling arm, the slide part is fixed to the rest of the head part and the coupling arm, and the slide part is slidably provided in the slide groove Thus, the work part can slide along the slide groove with respect to the main body, can slide between the first position and the second position, and the work part moves to the first position. , The width of the opening is reduced, The ride groove has an arc shape, the arc center of the slide groove is located outside the head portion, located on the side away from the free jaw of the main body, the slide portion has a cross-sectional shape that does not take a circular shape, Accordingly, the slide device includes a slide device that cannot rotate in the slide groove, and an elastic tool that is disposed between the main body and the work portion, and thereby urges the work portion to the first position. To do.

  According to the toothed wheel type open-end wrench of the present invention, the working unit has two coupling arms, the two coupling arms are in contact with the head unit, the head unit is located between the two coupling arms, and the slide A groove is formed in the head portion.

  According to the toothed wheel type open-end wrench of the present invention, two fixing holes are formed in the coupling arm, the slide portion includes two pins, each pin is slidably provided in the slide groove, and the two pins are respectively It is inserted into one of the fixing holes.

  According to the open end wrench of the present invention, the thickness of the fixed jaw is larger than the thickness of the head portion, so that at least one step surface is formed on the main body, and the step surface is between the fixed jaw and the head portion. When the work part is located at the first position, the coupling arm is in contact with the step surface.

  According to the open end wrench of the present invention, the thickness of the fixed jaw is larger than the thickness of the head portion, so that at least one step surface is formed on the main body, and the step surface is between the fixed jaw and the head portion. When the work part is located at the first position, the coupling arm is in contact with the step surface.

  According to the open end wrench of the present invention, the thickness of the fixed jaw is larger than the thickness of the head portion, so that at least one step surface is formed on the main body, and the step surface is between the fixed jaw and the head portion. When the work part is located at the first position, the coupling arm is in contact with the step surface.

  According to the toothed wheel type open-end wrench of the present invention, the fixed jaw and the free jaw are each formed with a groove, the two grooves are opposed to each other, and the corner of the rod having a polygonal cross-sectional shape It is possible to pinch.

  According to the open end wrench of the present invention, the opening has a bottom end close to the coupling arm, and the distance between the groove of the free jaw and the bottom end is longer than the distance between the groove of the fixed jaw and the bottom end. Thus, the positions of the two grooves are not symmetrical with each other.

  According to the open end wrench of the present invention, the opening defines the width direction, and when the working part is located at the first position, the opening can sandwich the fastener, and the working part, the fixed jaw and the head When the distance between both sides farthest from the part is the initial width and the work part moves to the second position and the fastener is rotatable in the opening, both sides of the work part, the fixed jaw and the head part farthest away from each other This distance is the maximum width, and the difference between the maximum width and the initial width is smaller than 10% of the initial width.

  According to the toothed wheel type open-end wrench of the present invention, the configuration is simple, the structure of each part can be easily manufactured by each type of processing method, and in particular, an abutting surface having an arc shape is not necessary, Since it is only necessary to form a slide groove having an arc shape, and the slide groove may penetrate the head part, the manufacturer can adopt a suitable processing method to produce the part, and the accuracy of the part In addition, the production cost can be easily controlled, and a part having higher strength can be produced by, for example, pressing or cutting, and the structural strength of the entire product can be increased.

It is a perspective view which shows Example 1 of this invention. It is a disassembled perspective view which shows Example 1 of this invention. It is a side view which shows Example 1 of this invention. It is a front view which shows Example 1 of this invention. It is a schematic diagram which shows operation | movement of Example 1 of this invention. It is a disassembled perspective view which shows Example 2 of this invention. It is a side view which shows Example 2 of this invention. It is a front view which shows Example 2 of this invention. It is a schematic diagram which shows operation | movement of Example 2 of this invention. It is a front view which shows Example 3 of this invention. It is a front view which shows Example 4 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Please refer to FIG. 1 to FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is an exploded perspective view showing the first embodiment of the present invention, and FIG. 3 is a side view showing the first embodiment of the present invention. 4 is a front view showing Example 1 of the present invention. The toothed wheel type open end wrench of the present embodiment has an opening, and can reciprocately swivel a fastener such as a bolt or a nut through the opening, thereby rotating the fastener in only one direction, The fastener can be screwed or loosened. The claw wheel type open-end wrench of the present embodiment includes a main body 1, a working unit 2, a slide device 3, and an elastic tool 4.

  The main body 1 includes a handle portion 11, a head portion 12, and a fixed jaw 13. The head portion 12 is connected to one end of the handle portion 11. The fixed jaw 13 extends from the head portion 12. Thus, the head part 12 connects the handle part 11 and the fixed jaw 13 together. In order to facilitate gripping or storage of the claw type open-end wrench of the present embodiment, an assembly handle or a suspension hole is provided at one end of the handle portion 11 away from the head portion 12. A groove 131 is further formed in the fixed jaw 13 of the main body 1. A hole 121 is provided in the head portion 12 of the main body 1. The thickness of the fixed jaw 13 may be larger than the thickness of the head portion 12. Thereby, a staircase surface is formed on one surface or both surfaces of the main body 1. The step surface is located between the fixed jaw 13 and the head portion 12.

  As shown in FIGS. 2 and 3, the working unit 2 includes two coupling arms 21 and a free jaw 22. The two coupling arms 21 are in contact with the head portion 12, so that the head portion 12 is positioned between the two coupling arms 21. By opening the universal jaw 22 to one side of the two coupling arms 21, an opening is formed from the universal jaw 22 and the fixed jaw 13. Further, a groove 221 is formed in the universal jaw 22 of the working unit 2, whereby the groove 221 of the universal jaw 22 and the groove 131 of the fixed jaw 13 are opposed to each other as shown in FIG. The corner portion of the head portion having a polygonal cross-sectional shape of the tool 5 can be sandwiched. Fixing holes 211 are respectively formed in the two coupling arms 21.

  In the present embodiment, the working unit 2 has two coupling arms 21, and the head unit 12 can be sandwiched between the two coupling arms 21, so that it is possible to prevent external dust and debris from entering the head unit 12. However, the working part may have one coupling arm, or two head parts may be formed on the main body, and the coupling arm may be sandwiched between the two head parts.

  The slide device 3 includes a slide groove 31 and a slide part. A slide groove 31 is formed in the head portion 12, and the slide portion is fixed to the coupling arm 21. Specifically, the slide part includes a slide block 321 and a fixing pin 322. The slide block 321 is slidably provided in the slide groove 31. A perforation 323 is formed in the slide block 321. The fixing pin 322 passes through the hole 323 and is inserted into the fixing hole 211 of the coupling arm 21 of the working unit 2. Thus, the slide part is slidably provided in the slide groove 31, and the work part 2 is slidable along the slide groove 31 with respect to the main body 1. Since the slide block 321 extends in an arc shape and the slide portion does not have a circular cross-sectional shape, the slide portion cannot rotate in the slide groove 31. In particular, since the fixing pin 322 is fixed to the slide block 321 and the coupling arm 21 of the work unit 2, the work unit 2 cannot rotate with respect to the slide block 321. Moreover, it is preferable that the cross-sectional shape of the perforation 323, the fixing pin 322, and the fixing hole 211 is not circular. The slide groove 31 has an arc shape, and the arc center 311 of the slide groove 31 is located outside the head portion and located on the side away from the free jaw 22 of the main body 1 as shown in FIG. Thus, when the working part 2 and the free jaw 22 move along the slide groove 31, the width of the opening can be changed.

  The elastic tool 4 is disposed between the main body 1 and the work unit 2. Specifically, the elastic tool 4 is accommodated in the hole 121 of the head unit 12 and pressed against the work unit 2.

  Please refer to FIG. 4 and FIG. Since the slide part is slidable along the slide groove 31 and is fixed to the coupling arm 21 of the work part 2, the work part 2 slides together with the slide part, and is in a first position and a second position. It can slide between. As shown in FIG. 4, the opening defines a width direction, and when the work part 2 is located at the first position, the opening can sandwich the fastener 5 or a similar one to the fastener 5. The distance between the farthest away sides of the machine part 2 from the fixed jaw 13 and the head part 12 is defined as an initial width Do. As shown in FIG. 5, when the working part 2 moves to the second position and the fastener 5 is rotatable in the opening, both the farthest away sides of the working part 2, the fixed jaw 13 and the head part 12. Is the maximum width Dm. In the present invention, the difference between the maximum width Dm and the initial width Do is smaller than 10% of the initial width Do. As described above, when the fastener 5 is rotated by the claw wheel type open-end wrench of the present embodiment, the fastener 5 can be rotated only in one direction without the need to slide the work part 2 excessively on both sides. And it can be used in a narrow working environment.

  As shown in FIG. 4, since the elastic tool 4 presses against the work part 2, the work part 2 is urged to the first position. As described above, when the external force is applied, the work unit 2 moves to the first position, so that the coupling arm 21 presses against the stepped surface, and the space between the work unit 2, the fixed jaw 13, and the head unit 12. The width returns to the initial width Do.

  In this embodiment, the slide groove 31 is formed in the head portion 12 and the slide portion is fixed to the coupling arm 21. However, the slide groove may be formed in the coupling arm and the slide portion may be fixed to the head portion 12. In this case, the fixing hole is not provided in the coupling arm but is provided in the head portion. Thus, the slide part can be assembled to the head part. Of course, the slide portion may be assembled to the head portion by another method.

  Please refer to FIG. 6 to FIG. 6 is an exploded perspective view showing the second embodiment of the present invention, FIG. 7 is a side view showing the second embodiment of the present invention, and FIG. 8 is a front view showing the second embodiment of the present invention. The configuration of the present embodiment is almost the same as that of the first embodiment, but two pins 324 are employed instead of the slide portion, and two fixing holes 211 are formed in each coupling arm 21 of the working portion. Each pin 324 is slidably provided in the slide groove 31 and is inserted into the fixing hole 211. As described above, the working unit 2 is slidable between the first position and the second position along the slide groove 31 as shown in FIGS. 8 and 9. In the present embodiment, the two pins 324 may have a circular cross-sectional shape, and when the two pins 324 slide as a slide portion, the entire slide portion cannot be rotated in the slide groove 31. . In addition, it is not necessary to specifically limit whether each pin 324 can be rotated in the slide groove 31 or can be rotated with respect to the working unit 2. The assembling operation of the claw wheel type open-end wrench of this embodiment is easier than that of the first embodiment.

  Please refer to FIG. FIG. 10 is a front view showing Embodiment 3 of the present invention. The opening of the toothed wheel type open-end wrench of this embodiment has a bottom end close to the coupling arm 21a, and the distance between the groove 221a of the free jaw 22a and the bottom end is the distance between the groove 131a of the fixed jaw 13a and the bottom end. Longer than the distance. Thus, the positions of the groove 221a and the groove 131a are not symmetrical with each other. As a result, when the toothed wheel type open-end wrench of the present embodiment is turned in the opposite direction, the angle required when the corner of the fastener is re-fitted into the groove 221a of the universal jaw 22a is reduced. it can. That is, the operation of the claw type open end wrench of this embodiment is further facilitated.

  Please refer to FIG. FIG. 11 is a front view showing Embodiment 4 of the present invention. According to the claw wheel type open end wrench of the present embodiment, the corner portion of the fastener can be further protected. In the claw wheel type open-end wrench of the present embodiment, a slope 133 facing the opening of the wrench is provided at the free end of the fixed jaw 13b. When the fastener 5 is sandwiched between the fixed jaw 13b and the universal jaw 22b, the fixed jaw 13b contacts one surface of the fastener 5 and does not contact any one of the corners of the fastener 5. The corners of the tool 5 are not worn by the fixed jaw 13b. Further, a depression 132 is formed in the fixed jaw 13b, a depression 222 is formed in the universal jaw 22b, the depressions 132 and 222 face each other, and the depression 132 of the fixed jaw 13b is recessed in a direction away from the universal jaw 22b, The depression 222 of the universal jaw 22b is recessed in a direction away from the fixed jaw 13b. Due to the depressions 132 and 222, the corners of the fastener 5 are not worn by the fixed jaw 13b and the universal jaw 22b.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

  The present invention can be applied to an open end wrench.

Do: initial width Dm: maximum width 1: main body 2: work unit 3: slide device 4: elastic device 5: fastener 11: handle unit 12: head unit 13, 13a, 13b: fixed jaw 21, 21a: coupling arm 22 22a, 22b: Swivel jaw 31: Slide groove 121: Hole 131, 131a: Groove 132: Depression 133: Slope 211: Fixing hole 221, 221a: Groove 222: Depression 311: Arc center 321: Slide block 322: Fixed pin 323 : Perforated 324: Pin

Claims (9)

A handle portion; at least one head portion; and a fixed jaw; wherein the head portion is connected to one end of the handle portion, and the fixed jaw extends from the head portion;
At least one coupling arm, and a free jaw, wherein the coupling arm is in contact with the head portion, whereby a working portion in which an opening is formed from the universal jaw and the fixed jaw;
A slide groove, and a slide part, wherein the slide groove is formed in one of the head part and the coupling arm, and the slide part is fixed to the rest of the head part and the coupling arm, The slide portion is slidably provided in the slide groove, whereby the working portion is slidable along the slide groove with respect to the main body, and is between the first position and the second position. When the working portion moves to the first position, the width of the opening is reduced, the slide groove has an arc shape, and the arc center of the slide groove is outside the head portion. A slide device that is located on the side of the main body away from the universal jaw, the slide portion has a circular cross-sectional shape, and is not rotatable in the slide groove;
A claw wheel type open-end wrench, comprising: an elastic tool that is arranged between the main body and the work part, and thereby urges the work part to the first position.   The working unit has two coupling arms, the two coupling arms are in contact with the head unit, the head unit is located between the two coupling arms, and the slide groove is formed in the head unit. The claw wheel type open-end wrench according to claim 1, which is formed.   Two fixing holes are formed in the coupling arm, the slide portion includes two pins, each pin is slidably provided in the slide groove, and each of the two pins is one of the fixing holes. The claw wheel type open-end wrench according to claim 2, wherein the claw-wheel type open-end wrench is inserted into a hook.   The thickness of the fixed jaw is larger than the thickness of the head portion, whereby at least one step surface is formed on the main body, and the step surface is located between the fixed jaw and the head portion, 2. The ratchet-type open-end wrench according to claim 1, wherein the coupling arm comes into contact with the stepped surface when is located at the first position.   The thickness of the fixed jaw is larger than the thickness of the head portion, whereby at least one step surface is formed on the main body, and the step surface is located between the fixed jaw and the head portion, The claw-wheel type open-end wrench according to claim 2, wherein the coupling arm abuts on the step surface when is located at the first position.   The thickness of the fixed jaw is larger than the thickness of the head portion, whereby at least one step surface is formed on the main body, and the step surface is located between the fixed jaw and the head portion, The claw wheel type open-end wrench according to claim 3, wherein the coupling arm abuts on the stepped surface when is located at the first position.   A groove is formed in each of the fixed jaw and the universal jaw, and the two grooves are opposed to each other and can sandwich a corner portion of a rod having a polygonal cross-sectional shape. The claw wheel type open end wrench according to claim 1.   The opening has a bottom end proximate to the coupling arm, and the distance between the groove and the bottom end of the universal jaw is longer than the distance between the groove and the bottom end of the fixed jaw, thereby The claw wheel type open-end wrench according to claim 7, wherein the positions of the grooves are not symmetrical with each other.   The opening defines a width direction, and when the working part is located at the first position, the opening can sandwich a fastener, and the farthest between the working part, the fixed jaw, and the head part. When the distance between the two sides is the initial width, and when the working part moves to the second position and the fastener is rotatable in the opening, the farthest of the working part, the fixed jaw, and the head part 2. The ratchet-type open-end wrench according to claim 1, wherein the distance between the two sides is a maximum width, and a difference between the maximum width and the initial width is smaller than 10% of the initial width.