JP4209874B2 - monkey wrench - Google Patents

Description

  The present invention relates to an improvement of a monkey wrench that is a hand tool used for tightening and loosening bolts and nuts, and in particular, a stopper that prevents rotation of a worm that is an adjustment screw that adjusts the distance between a fixed jaw and a movable jaw. It relates to the provided monkey wrench.

  The monkey wrench, which is a hand tool used to fasten conventional bolts and nuts, can be attached to or detached from a wrench body that has a fixed jaw at the tip and a fixed jaw that is slidably disposed at the tip of the wrench body. A rack having a movable jaw, and a worm that meshes with a rack for adjusting the distance between the fixed jaw and the movable jaw, which is rotatably disposed facing a window hole provided in the wrench body. .

  The conventional monkey wrench rotates the worm, slides the rack with respect to the wrench main body as the worm rotates, and moves the movable jaw of the rack relative to the fixed chin of the wrench main body. Adjust the distance between the fixed jaws and the movable jaws of the rack to the two-sided width that is the distance between the two parallel surfaces of the bolt head and the two-sided width that is the distance between the two parallel surfaces of the nut. It can be used for fastening bolts and nuts of various sizes.

Further, Patent Document 1 discloses a monkey wrench with a lock function provided with a stopper having a rubber abutting against a worm.
JP-A-5-177558

  However, in the monkey wrench with a lock function disclosed in Patent Document 1, it is necessary to strongly press the stopper toward the worm by the urging force of the spring. In addition, it is necessary to perform complicated processing to insert the stopper and the spring into the wrench body, which is troublesome and troublesome, and the manufacturing cost is expensive.

  Therefore, in view of the above-mentioned problems, the present invention provides a stopper for preventing rotation of the worm in the direction of opening the movable jaw because the tip of the stopper comes into contact with the thread of the worm when the bolt or nut is tightened or loosened. Since it is not necessary to press the stopper strongly toward the worm and the worm does not rotate freely, the movable jaw of the rack can move in a direction away from the movable jaw of the rack. Since the distance between the fixed jaw of the wrench body and the movable jaw of the rack is not larger than the width of the two sides of the bolt head or the width of the nut, the corner of the bolt head or nut The bolts and nuts can be tightened or loosened in a stable state without risk of being crushed and damaged by the fixed jaw of the main unit and the movable jaw of the rack. In this case, the operation member moves the stopper in the direction away from the worm only by pressing the operation portion of the operation member with the finger against the elastic force of the stopper. The stopper and the operating member can be released together with the first cover member and the second cover member of the wrench cover, so that the stopper and the operating member can be easily attached to the wrench body. The first cover member and the second cover member of the wrench cover are arranged in the width direction of the grip handle portion of the wrench main body without complicated processing for fitting a stopper or the like into the wrench main body. It is an object of the present invention to provide a monkey wrench that is inexpensive to manufacture without rattling or moving in the longitudinal direction of the handle part.

  The monkey wrench of the present invention has a fixed jaw at the tip and a wrench main body having a grip handle extending in the opposite direction to the fixed jaw, and is slidably disposed at the tip of the wrench main body, A rack having a movable jaw that can be moved toward and away from the fixed jaw, and a pivotable opening facing a window hole provided in the wrench body, and adjusting the distance between the fixed jaw and the movable jaw In the monkey wrench having a worm meshing with the rack for performing, an elastically deformable stopper for preventing the rotation of the worm in the direction of opening the movable jaw is disposed on one side of the wrench body, and the wrench An elastically deformable operation member having a pressing operation portion for moving the stopper in a direction away from the worm is disposed on the opposite side of the main body, and the wrench main body of the grip handle portion A wrench cover is disposed so as to cover the periphery of the stopper, and a contact portion that contacts the thread of the worm is formed along the substantially tangential direction on the stopper, and the window hole of the wrench body is formed on the operation member. An engagement release piece for releasing the engagement between the worm and the stopper is formed, the edge of the engagement release piece of the operation member is in contact with one surface of the stopper, and the wrench cover is It is divided into two, and consists of a first cover member that covers one side of the grip handle portion near the wrench body and a second cover member that covers the opposite side of the grip handle portion near the wrench body, A stopper mounting portion for mounting the stopper is formed on the first cover member of the wrench cover, an operation member mounting portion for mounting the operation member on the second cover member of the wrench cover is formed, and the wrench cover An end of the stopper is mounted on the stopper mounting portion of the first cover member, an end of the operating member is mounted on the operating member mounting portion of the second cover member of the wrench cover, and the wrench One side of the first cover member and the second cover member of the cover is connected through a hinge part so as to be freely opened and closed, and the other side of the first cover member and the second cover member of the wrench cover Are detachably coupled to each other.

  In the monkey wrench of the present invention, the first cover member and the second cover member of the wrench cover have a concave-convex engaging portion for engaging with the concave-convex portion, and the first cover member and the second cover member are engaged. The first cover member and the second cover member are fixed to a fixed position near the wrench main body of the grip handle portion. Has been.

  In the monkey wrench of the present invention, the first cover member and the second cover member of the wrench cover have engaging portions that engage with both sides of the grip handle portion near the wrench body.

  In the monkey wrench of the present invention, either one of the first cover member and the second cover member of the wrench cover has an elastically deformable engagement piece that engages with the outside of the side wall.

  As described above, according to the present invention, when the bolt and nut are tightened or loosened, the tip of the stopper comes into contact with the thread of the worm, so that the worm can be rotated in the direction to open the movable jaw. It can be blocked by the stopper, it is not necessary to press the stopper strongly against the worm, and the worm does not rotate freely, so the movable jaw of the rack moves in a direction away from the movable jaw of the rack Since the distance between the fixed jaw of the wrench body and the movable jaw of the rack is not larger than the width of the two sides of the bolt head or the width of the nut, the corners of the bolt head or nut The bolts and nuts can be tightened or loosened in a stable state without fear of being crushed and damaged by the fixed jaws of the wrench and the movable jaws of the rack. In this case, the operation member moves the stopper in the direction away from the worm only by pressing the operation portion of the operation member with the finger against the elastic force of the stopper. The stopper and the operating member can be released together with the first cover member and the second cover member of the wrench cover, so that the stopper and the operating member can be easily attached to the wrench body. The first cover member and the second cover member of the wrench cover are arranged in the width direction of the grip handle portion of the wrench main body without complicated processing for fitting a stopper or the like into the wrench main body. A monkey wrench that is inexpensive to manufacture can be obtained without rattling or moving in the longitudinal direction of the handle.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  The monkey wrench M of the present invention has a fixed jaw 10 at the tip and a wrench main body 1 having a grip handle portion 11 extending in a direction opposite to the fixed jaw 10, and is slidable on the tip of the wrench main body 1. A rack 2 having a movable jaw 20 that is disposed and can be moved toward and away from the fixed jaw 10 and a window hole 12 that is opened in the wrench body 1 are rotatably disposed to be movable with the fixed jaw 10. A worm 3 that meshes with a rack 2 for adjusting the distance from the jaw 20 is provided.

  The monkey wrench M of the present invention is provided with an elastically deformable stopper 4 that prevents the worm 3 from rotating in the direction of opening the movable jaw 20 on one side of the wrench body 1.

  The monkey wrench M of the present invention is provided with an elastically deformable operation member 5 having a pressing operation portion 50 for moving the stopper 4 in a direction away from the worm 3 on the opposite side of the wrench body 1.

  In the monkey wrench M of the present invention, a wrench cover 6 made of a synthetic resin is disposed so as to cover the periphery of the grip handle portion 11 near the wrench body 1.

  In the monkey wrench M of the present invention, an abutting portion 40 that abuts against the thread 30 of the worm 3 is formed on the stopper 4 so as to be substantially along the tangential direction.

  In the monkey wrench M of the present invention, an engagement release piece 51 that releases the engagement between the worm 3 and the stopper 4 through the window hole 12 of the wrench body 1 is formed in the operation member 5.

  In the adjustable wrench M of the present invention, the end edge of the disengagement piece 51 of the operation member 5 is in contact with one surface of the stopper 4.

  In the monkey wrench M of the present invention, the wrench cover 6 is divided into two, the first cover member 60 covering one side of the grip handle portion 11 near the wrench main body 1 and the wrench main body 1 of the grip handle portion 11 close to the wrench main body 1 And a second cover member 70 covering the opposite side.

  The monkey wrench M of the present invention forms a stopper insertion hole 68 as a stopper mounting portion for mounting the stopper 4 on the first cover member 60 of the wrench cover 6.

  The monkey wrench M of the present invention has an operation member insertion hole 79 as an operation member mounting portion for mounting the operation member 5 on the second cover member 70 of the wrench cover 6.

  The monkey wrench M of the present invention is mounted by inserting the end of the stopper 4 into the stopper insertion hole 68 of the first cover member 60 of the wrench cover 6.

  The monkey wrench M of the present invention is mounted by inserting the end of the operation member 5 into the operation member insertion hole 79 of the second cover member 70 of the wrench cover 6.

  In the monkey wrench M of the present invention, one side of the first cover member 60 and the second cover member 70 of the wrench cover 6 is joined via a hinge portion (not shown) so as to be opened and closed.

  In the monkey wrench M of the present invention, the other sides of the first cover member 60 and the second cover member 70 of the wrench cover 6 are detachably coupled.

  The monkey wrench M of the present invention has an engagement protrusion 62 and an engagement hole 78 that serve as an uneven engagement portion where the first cover member 60 and the second cover member 70 of the wrench cover 6 engage with each other. The first cover member 60 and the second cover member 70 are coupled to each other by engaging the engaging protrusions 62 and the engaging holes 78 in a concavo-convex manner, and the first cover member 60 and the second cover member 70. However, it is fixed at a fixed position near the wrench body 1 of the grip handle portion 11.

  In the monkey wrench M of the present invention, the first cover member 60 and the second cover member 70 of the wrench cover 6 have engaging portions 61 and 71 that engage with both sides of the grip handle portion 11 near the wrench body 1. is doing.

  In the monkey wrench M of the present invention, the second cover member 70 of the wrench cover 6 has an elastically deformable engagement piece 72 that engages the outside of the side wall 66 a of the first cover member 60.

Hereinafter, the monkey wrench which concerns on the Example of this invention is demonstrated in detail, referring drawings.
1 is a perspective view of a monkey wrench according to an embodiment of the present invention, FIG. 2 is a perspective view of the monkey wrench according to an embodiment of the present invention as viewed obliquely from below, and FIG. 3 is an enlarged perspective view of a main part of FIG. 4 is an enlarged perspective view of the main part of FIG. 2, FIG. 5 is a plan view of the main part showing the structure of the monkey wrench according to the embodiment of the present invention, and FIG. 6 is a side sectional view of the main part of FIG. 7 is a perspective view showing the structure of the wrench cover, FIG. 8 is a plan view of the main part showing the attachment state of the wrench cover to the monkey wrench, and FIG. 9 is the main part showing the attachment state of the wrench cover to the monkey wrench. It is a partial bottom view.
The monkey wrench M has a wrench body 1 as shown in FIGS. 1 and 2.

  As shown in FIGS. 3 and 4, a protruding fixed jaw 10 is integrally formed on one side of the tip of the wrench body 1 of the monkey wrench M, and a guide groove for guiding the rack 2 is formed at the tip of the wrench body 1. 13 is formed.

  The wrench main body 1 of the monkey wrench M is formed with a grip handle portion 11 extending in a direction opposite to the fixed jaw 10.

  As shown in FIGS. 1 and 3, an open window hole 12 for placing the worm 3 is provided near the tip of the wrench body 1 of the monkey wrench M, and one of the window holes 12 of the wrench body 1 is provided. As shown in FIG. 5, an open screw hole 14 is provided on the side surface. Between the other outer side surface of the wrench body 1 and the other inner side surface of the window hole 12, the screw hole 14 is on the same central axis. An insertion hole 15 is provided so as to penetrate the support shaft 8 along the axis.

  As shown in FIG. 5, a rack 2 is slidably disposed in the guide groove 13 of the wrench body 1 of the monkey wrench M, and the rack 2 has a movable jaw that can be brought into and out of contact with the fixed jaw 10 of the wrench body 1. 20 is integrally formed.

  As shown in FIG. 1, a worm 3 that meshes with the rack 2 is rotatably disposed in the window hole 12 of the wrench body 1 of the monkey wrench M, and a large number of notches are formed at the top of the thread 30 of the worm 3. As shown in FIG. 5, the worm 3 is attached to the window hole 12 of the wrench body 1 via the support shaft 8.

  As shown in FIG. 5, a male thread portion 80 that is screwed into the screw hole 14 of the wrench body 1 of the monkey wrench M is formed at the distal end of the support shaft 8. A concave groove 81 is formed for use when screwing 80 into the screw hole 14 of the wrench body 1 with a hand tool such as a screwdriver.

  As shown in FIG. 5, the support shaft 8 is inserted into the insertion hole 15 and the worm 3 of the wrench body 1 of the monkey wrench M, and the threaded portion 80 of the support shaft 8 is screwed into the screw hole 14 of the wrench body 1. The base end of the support shaft 8 is fitted into the insertion hole 15 of the wrench body 1, and the support shaft 8 passes through the worm 3 and is supported rotatably.

  In the vicinity of one side between the window hole 12 of the wrench main body 1 of the monkey wrench M and the grip handle 11, a plate-like stopper 4 for preventing the rotation of the worm 3 is disposed as shown in FIGS. As shown in FIG. 6, a contact portion 40 that contacts the top of the thread 30 of the worm 3 is formed at the tip of the stopper 4, and the contact portion 40 of the stopper 4 is substantially in contact with the worm 3. It is bent along the tangential direction.

  In the vicinity of the opposite side between the window hole 12 of the wrench body 1 of the monkey wrench M and the handle 11, as shown in FIG. 2, a plate shape for moving the stopper 4 away from the worm 3. As shown in FIG. 4, a pressing operation portion 50 for performing a pressing operation bulging toward both sides is formed near the tip of the operating member 5. As shown in FIG. 6, an engagement release piece 51 that is bent at a substantially right angle toward the stopper 4 for releasing the engagement between the worm 3 and the stopper 4 is formed at the tip. An end edge of the mating release piece 51 passes through the window hole 12 of the wrench main body 1 of the monkey wrench M and is brought into contact with an inner surface near the tip of the stopper 4.

  As shown in FIGS. 1 and 3, a first cover member 60 of a synthetic resin wrench cover 6 for attaching the stopper 4 is arranged on one side of the gripping part 11 of the monkey wrench M near the wrench body 1. The first cover member 60 of the wrench cover 6 has a cover member main body 63 that covers a surface on one side of the gripping handle portion 11 of the monkey wrench M near the wrench main body 1.

  As shown in FIGS. 1 and 3, a stopper insertion hole 68 for inserting the stopper 4 is formed in the vicinity of the middle of the first cover member 60 of the wrench cover 6 near one end of the cover member body 63. As shown in FIG. 7, a stopper insertion port 64 is formed on one end surface of the cover 63 so that the stopper 4 is inserted into the stopper insertion hole 68, and is formed at a position corresponding to the stopper insertion hole 68 of the cover member main body 63. Reinforcing protrusions 65 projecting outward are formed.

  On both sides of the cover member main body 63 of the first cover member 60 of the wrench cover 6, as shown in FIG. 7, a pair of opposite side walls 66 a and 66 b projecting toward the second cover member 70 are formed. The one side wall 66a of the cover member body 63 is integrally formed with a plurality of positioning projections 62 protruding outward at appropriate locations, and a part of the engagement projection 62 is inclined. A surface 67 is formed, and a plurality of engaging portions 61 are formed on the inner sides of the side walls 66a and 66b of the first cover member 60 to be engaged with both sides of the gripping handle portion 11 of the monkey wrench M near the wrench body 1. Yes.

  As shown in FIG. 6, the base end of the stopper 4 is inserted into the stopper insertion hole 68 of the cover member main body 63 of the first cover member 60 of the wrench cover 6 from the stopper insertion port 64. The cover member 60 protrudes from one end of the cover member main body 63 toward the worm 3.

  The stopper 4 may be fixed by an adhesive or the like so as not to come off from the stopper insertion hole 68 of the cover member main body 63 of the first cover member 60 of the wrench cover 6.

  As shown in FIGS. 2 and 4, the second cover member 70 of the synthetic resin wrench cover 6 for attaching the operation member 5 is provided on the opposite side of the gripping part 11 of the monkey wrench M toward the wrench body 1. The second cover member 70 of the wrench cover 6 has a cover member main body 73 that covers the opposite surface of the gripping handle portion 11 of the monkey wrench M near the wrench main body 1.

  At one end of the cover member main body 73 of the second cover member 70 of the wrench cover 6, as shown in FIG. 4, a recess 74 that opens toward the window hole 12 of the wrench main body 1 of the monkey wrench M is formed. An operation member insertion hole 79 for inserting the operation member 5 is formed near the middle of the cover member main body 73 near one end, and the operation member insertion hole is formed on the inner end surface of the recess 74 of the cover member main body 73 as shown in FIG. An operation member insertion port 75 that opens to insert the operation member 5 into the hole 79 is formed, and a reinforcing convex portion 76 that protrudes outward is formed at a position corresponding to the operation member insertion hole 79 of the cover member main body 73. Is formed.

  On both sides of the cover member main body 73 of the second cover member 70 of the wrench cover 6, as shown in FIG. 7, a pair of opposite side walls 77 a and 77 b projecting toward the first cover member 60 are formed. 8 and 9, on one side wall 77a of the cover member main body 73, outside the one side wall 66a of the first cover member 60 projecting in the direction opposite to the reinforcing convex portion 76. An engagement piece 72 that is elastically deformable to be engaged is formed. The engagement piece 72 is provided with a plurality of engagement holes 78 that engage with the plurality of engagement protrusions 62 of the first cover member 60, and the second. A plurality of engaging portions 71 are formed on the inner sides of the side walls 77a and 77b of the cover member 70 to engage with both sides of the handle portion 11 of the monkey wrench M near the wrench body 1.

  As shown in FIG. 6, the base end portion of the operation member 5 is inserted into the operation member insertion hole 79 of the cover member main body 73 of the second cover member 70 of the wrench cover 6 from the operation member insertion port 75. 5 protrudes from the inner end of the recess 74 of the cover member main body 73 of the second cover member 70 toward the worm 3.

  The operation member 5 may be fixed by an adhesive or the like so as not to come off from the operation member insertion hole 79 of the cover member main body 73 of the second cover member 70 of the wrench cover 6.

  The first cover member 60 and the second cover member 70 of the wrench cover 6 are integrally formed of a synthetic resin material such as plastic.

  In the wrench cover 6, the side wall 66b of the first cover member 60 made of synthetic resin divided into two and the side wall 77b of the second cover member 70 made of synthetic resin are integrally coupled via a hinge portion (not shown). The first cover member 60 and the second cover member 70 of the wrench cover 6 can be opened and closed by a hinge portion.

Hereinafter, a method of attaching the stopper and the operation member to the monkey wrench will be described.
First, the base end portion of the stopper 4 is inserted into the stopper insertion hole 68 of the cover member main body 63 of the first cover member 60 of the wrench cover 6, and the stopper 4 is inserted into the cover member main body of the first cover member 60 of the wrench cover 6. Attach to 63.

  Next, the base end portion of the operation member 5 is inserted into the operation member insertion hole 79 of the cover member main body 73 of the second cover member 70 of the wrench cover 6, and the operation member 5 is inserted into the second cover member 70 of the wrench cover 6. The cover member main body 73 is attached.

  Next, after the first cover member 60 and the second cover member 70 of the wrench cover 6 are opened, the cover member main body 73 of the second cover member 70 of the wrench cover 6 is the grip handle of the monkey wrench M. The disengagement piece 51 of the operation member 5 is inserted into the window hole 12 of the wrench body 1 of the monkey wrench M so as to cover the surface of the portion 11 opposite to the wrench body 1 and the second of the wrench cover 6. The cover member 70 is pressed by hand on the opposite side of the gripping part 11 of the monkey wrench M from the wrench body 1.

  Next, the first cover member of the wrench cover 6 is formed so that the cover member main body 63 of the first cover member 60 of the wrench cover 6 covers one surface of the gripping handle portion 11 of the monkey wrench M near the wrench main body 1. 60 is closed while being pressed by hand toward the second cover member 70.

  When the first cover member 60 and the second cover member 70 of the wrench cover 6 are closed, the engagement pieces 72 of the second cover member 70 of the wrench cover 6 form a plurality of engagement protrusions of the first cover member 60. It is elastically deformed while engaging with the inclined surface 67 of 62.

  When the plurality of engagement protrusions 62 of the first cover member 60 of the wrench cover 6 reach the plurality of engagement holes 78 of the engagement pieces 72 of the second cover member 70, the plurality of first cover members 60 As shown in FIG. 7, the engaging protrusion 62 of the second cover member 70 enters and engages with the plurality of engaging holes 78 of the engaging piece 72 of the second cover member 70, and at the same time, the second cover of the wrench cover 6. The engagement piece 72 of the member 70 returns to its original shape by the elastic force.

  When the engagement piece 72 of the second cover member 70 of the wrench cover 6 returns to its original shape, the engagement piece 72 of the second cover member 70 of the wrench cover 6 becomes the first as shown in FIGS. As shown in FIG. 7, the side walls 66a and 66b of the first cover member 60 of the wrench cover 6 and the side walls 77a and 77b of the second cover member 70 are engaged with the outside of the side wall 66a of the first cover member 60. And the first cover member 60 and the second cover member 70 of the wrench cover 6 are coupled in a closed state, and as shown in FIGS. 1 and 2, the first cover of the wrench cover 6 The member 60 and the second cover member 70 are fixed so as to cover the periphery at a fixed position near the wrench main body 1 of the handle part 11 of the monkey wrench M.

  When the first cover member 60 and the second cover member 70 of the wrench cover 6 are fixed at a fixed position near the wrench main body 1 of the grip handle portion 11 of the monkey wrench M, the stopper 4 becomes the first cover member of the wrench cover 6. The operation member 5 is attached to a predetermined position on one side of the wrench body 1 of the monkey wrench M via the 60, and the operation member 5 is attached to a predetermined position on the opposite side of the wrench body 1 of the monkey wrench M via the second cover member 70 of the wrench cover 6. The tip of the contact part 40 of the stopper 4 is contacted with the top of the thread 30 of the worm 3 of the monkey wrench M, and the edge of the disengagement piece 51 of the operation member 5 is the wrench of the monkey wrench M. Through the window hole 12 of the main body 1, the stopper 4 abuts on the inner surface of the abutting portion 40 of the stopper 4, and the stopper 4 rotates the monkey wrench M in the direction to open the movable jaw 20 of the worm 3. And it has a sealed state.

  Further, as shown in FIGS. 8 and 9, the plurality of engaging portions 61 on the side walls 66 a and 66 b of the first cover member 60 of the wrench cover 6 and the plurality of engagements on the side walls 77 a and 77 b of the second cover member 70. Since the joint portion 71 is engaged with a part of the grip handle portion 11 of the monkey wrench M on both sides of the wrench main body 1 side, the first cover member 60 and the second cover member 70 of the wrench cover 6 are There is no risk of rattling in the width direction of the M grip handle portion 11 or moving in the longitudinal direction of the grip handle portion 11 of the adjustable wrench M.

Next, the usage method of the monkey wrench which concerns on the Example of this invention is demonstrated.
When tightening or loosening the bolts and nuts with the monkey wrench M, when adjusting the distance between the fixed jaw 10 of the wrench body 1 of the monkey wrench M and the movable jaw 20 of the rack 2, When the pressing operation portion 50 of the member 5 is pressed with a finger toward the opposite surface of the wrench body 1 of the monkey wrench M against the elastic force of the stopper 4, the operation member 5 pushes the stopper 4 against the worm 3 of the monkey wrench M. The tip of the contact portion 40 of the stopper 4 is disengaged from the top of the thread 30 of the worm 3 of the monkey wrench M, and the disengagement piece 51 of the operating member 5 is connected to the worm 3 and the stopper 4. The worm 3 of the monkey wrench M is free to rotate with respect to the support shaft 8.

  Then, by rotating the worm 3 arranged in the window hole 12 of the wrench main body 1 of the monkey wrench M with respect to the support shaft 6 with a finger, the rack 2 is inserted into the guide groove 13 of the wrench main body 1 as the worm 3 rotates. The movable jaw 20 moves in a direction away from the fixed jaw 10 of the wrench body 1 as the rack 2 slides, and the fixed jaw 10 of the wrench body 1 and the movable jaw 20 of the rack 2 Is adjusted to the two-surface width that is the distance between two parallel surfaces of the head of the hexagon bolt or the two-surface width that is the distance between two parallel surfaces of the hexagon nut.

  Thereafter, when the finger is released from the pressing operation portion 50 of the operation member 5, the operation member 5 returns to the original shape by the elastic force, and at the same time, the stopper 4 returns to the original shape by the elastic force, and the contact portion of the stopper 4 again. The tip of 40 abuts on the top of the thread 30 of the worm 3 of the monkey wrench M, and the stopper 4 prevents rotation of the monkey wrench M in the direction of opening the movable jaw 20 of the worm 3.

  And since many notches are formed in the top part of the thread 30 of the worm 3 of the monkey wrench M, the tip of the contact part 40 of the stopper 4 and the notch of the top part of the thread 30 of the worm 3 are surely secured. If the pressing operation portion 50 of the operating member 5 is not pressed with a finger, there is no possibility that the engagement between the stopper 4 and the worm 3 is released.

  Further, when adjusting the distance between the fixed jaw 10 of the wrench main body 1 of the monkey wrench M and the movable jaw 20 of the rack 2 to be narrower, the tip of the contact portion 40 of the stopper 4 is the tip of the worm 3 of the monkey wrench M. Even if it is in contact with the top of the screw thread 30, the worm 3 can be rotated in the direction in which the movable jaw 20 is closed.

  In the above-described embodiment, the first cover member and the second cover member of the wrench cover are engaged by engaging the engagement protrusion of the first cover member of the wrench cover with the engagement hole of the second cover member. The other side of the cover member is detachably coupled, but the first cover member and the second cover member of the wrench cover are not formed with engagement protrusions or engagement holes, and the first of the wrench cover is formed. The other side of the cover member and the second cover member may be detachably coupled with screws.

The perspective view of the monkey wrench which concerns on the Example of this invention. The perspective view which looked at the adjustable wrench which concerns on the Example of this invention from diagonally downward. The principal part expansion perspective view of FIG. The principal part expansion perspective view of FIG. The principal part cutting top view which shows the structure of the monkey wrench which concerns on the Example of this invention. FIG. 4 is a side sectional view of a main part of FIG. 3. The perspective view which shows the structure of a wrench cover. The principal part top view which shows the attachment state to the monkey wrench of a wrench cover. The principal part bottom view which shows the attachment state to the monkey wrench of a wrench cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wrench main body 2 Rack 3 Worm 4 Stopper 5 Operation member 6 Wrench cover 8 Support shaft 10 Fixed jaw 11 Grip handle part 12 Window hole 13 Guide groove 14 Screw hole 15 Insertion hole 20 Movable jaw 30 Screw thread 40 Contact part 50 Press operation Part 51 Disengagement piece 60 First cover member 61 Engagement part 62 Engagement protrusion 63 Cover member main body 64 Stopper insertion port 65 Reinforcement convex part 66a, 66b Side wall 67 Inclined surface 68 Stopper insertion hole (stopper mounting part)
70 Second cover member 71 Engagement part 72 Engagement piece 73 Cover member main body 74 Recess 75 Operation member insertion port 76 Reinforcement convex part 77a, 77b Side wall 78 Engagement hole 79 Operation member insertion hole (operation member mounting part)
80 Male thread 81 Concave groove M Monkey wrench

Claims (4)

A wrench main body having a fixed jaw at the tip and having a grip handle extending in the opposite direction to the fixed jaw, and slidably disposed at the tip of the wrench main body, is in contact with the fixed jaw. A rack having a movable jaw that can be separated, and a rack that is rotatably disposed to face an opening window provided in the wrench body, and meshes with the rack for adjusting the distance between the fixed jaw and the movable jaw. In the adjustable wrench with worm,
An elastically deformable stopper that prevents rotation of the worm in the direction of opening the movable jaw is disposed on one side of the wrench body, and the stopper is moved away from the worm on the opposite side of the wrench body. An elastically deformable operation member having a pressing operation portion is disposed, a wrench cover is disposed so as to cover the grip handle portion near the wrench body, and the stopper contacts the worm screw thread The contact portion is formed so as to be substantially along the tangential direction, and an engagement release piece for releasing the engagement between the worm and the stopper through the window hole of the wrench body is formed in the operation member, An end edge of the disengagement piece of the operation member is brought into contact with one surface of the stopper, the wrench cover is divided into two, and a first cover that covers one side of the grip handle portion near the wrench main body. A stopper mounting portion for mounting the stopper on the first cover member of the wrench cover, and a second cover member covering the opposite side of the grip handle portion opposite to the wrench body. An operation member mounting portion for mounting the operation member on the second cover member of the cover is formed, an end portion of the stopper is mounted on the stopper mounting portion of the first cover member of the wrench cover, and the wrench An end portion of the operation member is attached to the operation member attachment portion of the second cover member of the cover, and one side of the first cover member and the second cover member of the wrench cover is interposed via a hinge portion. A monkey wrench characterized in that the other side of the first cover member and the second cover member of the wrench cover are detachably coupled.   The first cover member and the second cover member of the wrench cover have a concave and convex engaging portion that engages with a concave and convex portion, and the first cover member and the second cover member are the concave and convex portions. 2. The first cover member and the second cover member are coupled to each other by engaging the engaging portion with concave and convex portions, and the first cover member and the second cover member are fixed to a fixed position near the wrench body of the grip handle portion. The described monkey wrench.   The said 1st cover member and said 2nd cover member of the said wrench cover have the engaging part which engages with the both sides near the said wrench main body of the said handle part. monkey wrench. 4. The device according to claim 1, wherein one of the first cover member and the second cover member of the wrench cover includes an elastically deformable engagement piece that engages with an outer side of the side wall. monkey wrench.

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