JP2022163668A - monkey wrench - Google Patents

Abstract

To provide a monkey wrench which can carry out work to instantly hold a nut or the like and continuously fasten and loosen.SOLUTION: A monkey wrench 1 includes: a movable jaw 2 which has an engagement rack 2b arranged on a bottom surface which can reciprocate in an approaching/separating direction to/from a fixed jaw 4 of the monkey wrench 1; a locking link 6 which has a locking rack 6a arranged on an upper surface meshing with the engagement rack 2b and pivotally supports a driving link 7 and a driven link 8; and a fastening link 9 which mutually biases with the movable jaw 2 with a spring 10 and pivotally supports the driving link 7 having a follower 7c and the driven link 8 having a follower 8c. The fastening link 9 can slide in a sliding groove 5b formed in the housing 5. The follower 7c of the driving link 7 is inserted in a groove-like cam 3a formed on a lever 3, the follower 8c of the driven link 8 is inserted in a clearance groove 3b, and the followers are abutted to the cam 3a and cam 3c. The lever 3 biases the locking link 6 and the spring 11 mutually, and the lever 3 is rotated to rock a locking link mechanism.SELECTED DRAWING: Figure 1

Description

The present invention relates to a monkey wrench used for tightening and loosening bolts and nuts.

The monkey wrench, which has been commonly used for tightening and loosening bolts and nuts, has a wrench body with a fixed jaw and a movable jaw that can reciprocate in the contact and separation direction with respect to the fixed jaw. It is known that a worm gear, which is pivotally supported in the contact and separation direction of the main body while meshing with a toothed rack gear, is rotated to reciprocate the movable body and clamp the nut.

In addition, there are known monkey wrenches provided with a ratchet function, for example, Patent Documents 8, 9 and 10.

For example, Patent Documents 1, 2 and 3 are known in which the movable jaw of a monkey wrench is adjusted by meshing racks. In addition, since these teeth are large, when a target nut or the like is clamped, there is a tendency for play to occur because fine adjustment cannot be performed, and when the nut is operated, the nut may be stripped, leading to damage to the nut.

A method of sliding the jaw part of an adjustable wrench, for example, Patent Document 4, is known, but the selection range of clamping objects is narrow and it is not possible to correspond to the original large and small size nuts of the adjustable wrench.

A method of reciprocating with the shape of the jaws of a monkey wrench, such as Patent Document 5, and Patent Documents 6 and 7, in which a ratchet function is provided by sliding the gripping surface of the jaws, are known, but both require time and effort to turn the worm. remains.

actual climbing 3095318 Jitsuzen Showa 52-156398 Jitsuzen Showa 57-170961 real climbing 3221512 actual climb 3152369 actual climb 3190709 JP 2013-063503 real climb 3162960 real climbing 3183139 JP 2017-030118 Jitsuzenhei 02-031668

A monkey wrench is a tool that can be used to tighten and loosen bolts and nuts of various sizes with a single tool. not.
In addition, when clamping objects of different sizes, it is necessary to rotate the worm gear a plurality of times to adjust the movable jaws.

Therefore, without adjusting the movable jaw of the adjustable wrench to the size of the nut, the nut is instantaneously grasped and the lever is reciprocally rotated without removing the adjustable wrench from the nut each time, thereby performing continuous work.

The monkey wrench of the present invention comprises a housing 5 having a fixed jaw 4 and a movable jaw 2 capable of reciprocating in the direction of contact and separation with respect to the fixed jaw 4, and intersects the bottom surface of the movable jaw 2 in the sliding direction. It has an engaging rack 2b and a spring groove 2c and is urged by a spring 10 in a direction in which a nut or the like is clamped.
(Claim 1)

A locking link 6 for locking the movable jaw 2 to the fixed jaw 4 has a locking rack 6a, and a driving link 7 swinging with symmetry and a bearing 6c for supporting the shafts 7a and 8a of the driven link 8. and a bearing portion 6d are provided to pivotally support the drive link 7 and the driven link 8, constitute a parallel link mechanism for moving the locking rack 6 in parallel, and allow the plurality of racks to mesh with each other in parallel. to enable.
(Claim 2)

A fastener pivotally supporting a driving link 7 having a follower 7c for actuation of the stationary joint and a driven link 8 having a follower 8c for releasing the engagement of the rack. The movable jaw 2 and the fixed jaw 4 formed in the housing 5 are provided with a pull-in link 9 and are accommodated in a slide groove 5b that allows the movable jaw 2 and the fixed jaw 4 to slide in the approaching and separating directions.
(Claim 3)

The tightening link 9 is formed on the lever 3 with cams 3a and 3c for actuating the drive link 7 and the driven link 8, and with relief grooves 3b. The lever 3 is operable with the connecting shaft 12 as a fulcrum, and the follower 7c of the driving link 7 and the follower 8c of the driven link 8, which are pivotally supported by the tightening link 9, are in contact with each other, and the locking link 6 to activate. That is, the cam 3a of the lever 3 moves the fulcrum of the link and the cam 3c actuates the driven link 8 to release the locking link 6 from the movable jaw 2.
Further, the lever 3 is biased in the meshing direction of the rack 6a of the locking link 6 by a spring 11 inserted into the groove 3d.
(Claim 4)

The interlocking of the parallel link mechanism and the tightening mechanism causes the lever 3 to reciprocate, and the engagement rack 2b and the engagement rack 6a of the movable jaw 2 locked to the fixed jaw 4 are repeatedly and continuously engaged and disengaged. It becomes possible to rotate a nut or the like.
(Claim 5)

The monkey wrench of the present invention can save the trouble of rotating the worm for adjusting the size for clamping the nut, etc., and can continuously rotate the nut, etc. once gripped, so that the working time can be greatly shortened.
In addition, the simple structure makes it possible to reduce member costs and facilitate maintenance of monkey wrenches.

It is a cross-sectional schematic diagram of the principal part of the monkey wrench of this invention. FIG. 2 is a cross-sectional view along AA in FIG. 1; 1 is an exploded perspective view of a monkey wrench according to the present invention; FIG. It is a perspective view of the assembly structure of the monkey wrench of this invention. FIG. 4 is a schematic diagram for explanation when using the monkey wrench of the present invention. FIG. 4 is a schematic diagram for explaining the ratchet function of the monkey wrench of the present invention; 1 is an external perspective view of a monkey wrench of the present invention; FIG.

Embodiments will be described below with reference to the drawings.

The monkey wrench 1 of FIG. 7 of the present invention has a housing 5 provided with a fixed jaw 4 of FIG. It is mainly composed of a locking link 6 having a locking rack 6a formed on the upper surface for locking the movable jaw 2, a link mechanism for operating the locking link 6, and a lever 3 having a shape for operating the link mechanism.

The housing 5 in which the fixed jaw 4 is provided is provided with a sliding groove 5a of the movable jaw 2 and a sliding groove 5b of the clamping link 9 in the approaching and separating directions, and is provided with a connecting shaft hole 5c.

The movable jaw 2 is formed with a sliding body 2a corresponding to the sliding groove 5a of the housing 5, and is received in the sliding groove 5a of the housing 5 so as to be movable. The bottom of the movable jaw 2 is formed with an engagement rack 2b that meshes with the engagement rack 6a of the engagement link 6, and has a spring groove 2c. The end of the spring 10 is accommodated in the spring groove 2c and the other end in the spring groove 6e of the locking link 6, and the movable jaw 2 is biased toward the fixed jaw 4, and the locking link 6 is biased toward the movable jaw 2 locking direction. .

A link mechanism for operating the locking link 6 is mainly composed of the locking link 6, the drive link 7, the driven link 8, the tightening link 9, the lever 3 and the spring 11 shown in FIG.

The locking link 6 is provided with a release button 6b protruding outside the housing 5, and is provided with a bearing 6c for the driving link 7 and a bearing 6d for the driven link 8. As shown in FIG.
The shape of the rack in which the movable jaw 2 and the locking link 6 are meshed can be any shape, such as a sawtooth shape, a wave shape, etc., and the shape is such that they mesh with each other.
The driving link 7 accommodated in the locking link 6 is formed of a shaft 7a, a shaft 7b and a follower 7c. The driven link 8 is formed of a shaft 8a, a shaft 8b and a follower 8c. A shaft 8a is supported.
The follower 7c of the drive link 7 contacts the cam 3a of the lever 3 shown in FIG.

The follower 7c actuates the locking link 6 and the tightening link 9, and the follower 8c releases the locking link 6 from engagement.

The tightening link 9 is provided with a shaft hole 9a and a shaft hole 9b for supporting the driving link 7 and the driven link 8 shown in FIG. Slide to enable movement of the pivotal support. The tightening link 9 is operated by rotating the cam 3a accommodating the follower 7c of the drive link 7 formed on the lever 3 of FIG.

The lever 3 is formed with a cam 3a, an escape groove 3b, a cam 3c and a spring groove 3d, and has a connecting shaft hole 3e.
The cam 3a of the lever 3 accommodates the follower 7c of the drive link 7, the cam 3c abuts the follower 8c of the follower link 8, and the relief groove 3b serves as a relief space when the follower 8c is actuated.
The terminal end of the spring 11 is inserted into the spring groove 3d of the lever 3, and the other end is inserted into the spring groove 6e of the lock link 6, and the lever 3 is biased in the tightening rotation direction.

The cam 3c of the lever 3 contacts the follower 8c of the driven link 8, and when the lever 3 rotates in the direction to loosen the nut 20, the follower 7c of the drive link 7 contacts the cam 3a, so that the drive link 7 is operated. Then, the tightening link 9 is moved, the fulcrum of the driven link 8 linked with the driving link 7 is moved, and the locking rack 6a of the locking link 6 which is in pressure engagement with the engaging rack 2b of the movable jaw 2 is moved. The pressure is released, and at the same time, the cam 3c, which is in contact with the follower 8c of the driven link 8, contacts the follower 8c of the follower link 8 and pushes up the follower 8c. As a result, the driven link 8 changes to a driven link, and furthermore, the engagement of the locking rack 6a of the locking link 6 is loosened and separated, and the movable jaw 2 is urged by the spring 10 but is free to move.

When the lever 3 is reciprocatingly rotated, the clamped nut can be continuously tightened as shown in FIG. 1 and loosened as shown in FIG.
It should be noted that the lever 3 cannot be rotated in reverse, and if necessary, the monkey wrench can be used by reversing it.

The usage and function of the adjustable wrench of the present invention will be explained using an arbitrary hexagonal nut.

When the nut 20 is tightened using the monkey wrench 1 in FIG. 5, the release button 6b is pushed by grasping the lever 3 and pushing the release button 6b with the thumb or forefinger. The locking rack 6a of 6 is disengaged and the movable jaw 2 becomes free.
Next, open the movable jaw 2 in the free state by pinching it with your fingers, and put the fixed jaw 4 on the target nut 20, or put the tip of the movable jaw 2 on the corner of the nut 20 and hook the movable jaw 2. When the nut 20 is held between the fixed jaw 4 and the release button 6b, the movable jaw is biased by the spring 10 by releasing the finger. The locking link 6 biased by 10 and 11 and the lever 3 biased by the spring 11 interact with each other, the locking link 6 being biased in the meshing direction of the racks and the lever 3 being biased by the spring 11. As a result, the cam 3a of the lever 3 acts on the follower 7c in contact with the drive link 7 to operate the tightening link 9, and the movable jaw 2 is ready for pressing and fixing.
Next, when the lever 3 is turned in the nut tightening direction, the locking link 6 presses the movable jaw 2 and the nut 20 can be tightened.

When continuously tightening the nut 20 without removing the monkey wrench from the nut 20, the lever 3 shown in FIG. That is, it becomes possible to continuously tighten the nut 20 by rotating the lever 3 back and forth. When the lever 3 that has tightened the nut 20 is returned in the opposite direction, the follower 7c of the driving link 7 is operated by the cam 3a, and the locking rack 6a of the locking link 6 that presses and fixes the movable jaw 2 is pushed. At the same time, the follower 8c of the driven link 8 resists the spring 11 by the cam 3c, and the locking link 6 is separated from the movable jaw 2, and the movable jaw 2 becomes free. At this time, the movable jaw 2 is in a free state, but since it is biased by the spring 10, the nut 20 is held.
Therefore, the nut 20 can be continuously tightened by reciprocatingly rotating the lever 3 by 60 degrees or more.
However, when returning the rotation of the lever 3, if it is rotated 30 degrees or more with respect to the tightened nut 20, the nut 20 of the fixed jaw 4 and the movable jaw 2 will be tightened from the stage past the top of the hexagonal nut 20. clamping starts, it is possible to clamp and tighten the apex portion of the nut 20 without turning it back completely 60 degrees. If it is limited to non-final tightening, it is effective for work in a narrow space.

When loosening the nut 20, the main body of the adjustable wrench 1 is turned over.

It should be noted that the above embodiment is not intended to limit the present invention, but is merely illustrative, and various modifications can be made to the configuration and structure of each part within the scope of technical assumptions.

1 monkey wrench body 2 movable jaw 2a sliding body 2b engaging rack 2c spring groove 3 lever 3a cam 3b escape groove 3c cam 3d spring groove 3e connecting shaft hole 4 fixed jaw 5 housing 5a sliding groove 5b sliding groove 5c connecting shaft hole 6 Locking link 6a Locking rack 6b Release button 6c Bearing 6d Bearing 6e Spring groove 7 Drive link 7a Shaft 7b Shaft 7c Follower 8 Driven link 8a Shaft 8b Shaft 8c Follower 9 Tightening link 9a Shaft hole 9b Shaft hole 10 Spring 11 Spring 12 Connecting shaft 20 Nut

Claims (4)

A monkey wrench has a fixed jaw, a housing provided with a sliding groove for the movable jaw, the movable jaw slidably disposed in the direction of contact and separation with respect to the fixed jaw, and a bottom surface of the movable jaw. A locking link having a locking rack having a locking rack meshing parallel to the movable jaw is provided on the upper surface of the locking link, and the locking link is operated to enable a meshing state and a non- meshing state with the locking rack. A monkey wrench characterized by comprising a link mechanism for The locking link pivotally supports the driving link and the driven link to form a parallel link mechanism. A monkey wrench characterized by biasing to A stationary link of the parallel link mechanism is a clamping link which pivotally supports a driving link having a follower and a driven link having a follower aligned with the driving link, and is formed in the housing. Each follower abuts a cam formed on a lever, the lever acting in parallel with the moving and separating direction of the movable jaw, and the follower of the follower link acting in parallel with the direction of contact and separation of the movable jaws. It has a cam shape that operates in a direction substantially intersecting with the contact/separation direction, and a connecting shaft is arranged.
Also, the monkey wrench is characterized in that the lever is biased by a spring in a direction to rotate the object. The locking link mechanism of claims 1 and 2 and the tightening mechanism of claim 3 are interlocked to press the movable jaw against the fixed jaw to lock and release, thereby obtaining a ratchet effect. A monkey wrench characterized by:

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