JP6231620B1 - Screw advance / retreat tool - Google Patents

Abstract

The present invention provides a work tool for screw advance / retreat capable of easily and quickly performing screw advance / retreat work and improving work efficiency. A vice plier portion having a fixed jaw portion, a movable jaw portion, a grip portion, an operation lever, and a clamp holding mechanism capable of holding a screwing member in a gripping state. Furthermore, the balance arm portion 9 for maintaining the balance when the screw member K is held in a gripped state and is rotated so as to be screwed or screwed is provided with a fixed jaw portion 21 or a movable jaw portion. It was provided extending from the tip of 31. [Selection] Figure 1

Description

  The present invention relates to a work tool for screwing back and forth.

  2. Description of the Related Art Conventionally, a spanner having a mouth portion that can be freely engaged with and disengaged from a bolt head or a nut portion is known as a working tool for screwing and retracting a bolt or nut (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 7-20258

  However, when carrying out screwing work on dozens to hundreds of machines, such as the caster mounting process at the production site of shopping carts, carts, etc., or nuts on all screw bolt members such as pipe and wiring suspension brackets. When performing a work with a long screwing / retracting stroke such as screwing or unscrewing, it is necessary to hold the handle of the spanner and swing it several tens of times. The final tightening was done with a spanner, but there was a problem that it took a lot of labor and effort and the work efficiency was poor.

  Therefore, an object of the present invention is to provide a working tool for screwing / retreating that can easily and quickly perform screwing / retreating work and can improve work efficiency.

In order to achieve the above object, the screw advance / retreat working tool according to the present invention includes a clamp holding mechanism that can hold a fixed jaw, a movable jaw, a grip, an operating lever, and a screwed member in a gripping state. A dynamic balance when rotating by inertial force by applying a rotational operation force for screwing or screwing while holding the screwing member in a gripped state. The balance arm part for taking is extended from the front-end | tip of the said fixed jaw part or the said movable jaw part.
Further, the balance arm portion is in the form of a metal strip, and the thickness dimension is set to 5 mm or more and 15 mm or less .

  According to the present invention, the balance arm portion and the vice plier portion can continue to rotate around the shaft center of the screwing member a plurality of times like a propeller by inertia force, and the screwing member can be screwed or released without hand. Can be screwed out. That is, it is not necessary to repeatedly perform a swinging operation like a wrench, and the screw advance / retreat operation can be performed efficiently easily and quickly. Dynamic balance (balance of rotation) is obtained by the balance arm portion, and the rotation is stabilized, and the balance arm portion can be rotated a plurality of times with a small rotation applying force. Also, the final tightening operation can be performed with a strong force by gripping both the balance arm portion and the vice plier portion (using the right hand and the left hand). Moreover, it can approach and hold from the side surface side (radial direction) of a screwing member, and can respond to a narrow work space.

1 shows an embodiment of the present invention and is a side view of a mouth opening state. FIG. It is a side view of a holding state. It is an operation explanatory view. It is a side view which shows other embodiment.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
As shown in FIGS. 1 and 2, the working tool for screw retraction according to the present invention is provided integrally with a fixed jaw portion 21, a movable jaw portion 31 facing the fixed jaw portion 21, and the fixed jaw portion 21. A vice plier portion 1 having a grip portion 22, an operation lever 4 disposed opposite to the grip portion 22, and a stub member 5 interposed between the grip portion 22 and the operation lever 4. Yes. Furthermore, the balance arm part 9 provided in an extended form from the tip of the fixed jaw part 21 is provided.

  First, the vice plier portion 1 has a body main body 2 having a fixed jaw portion 21 and a grip portion 22 integrally, a movable jaw portion 31, and a swinging body pivotally attached to the body main body 2 with a jaw swing axis L3. 3, a jaw pivot shaft 30 that pivotally mounts the body body 2 and the swing body 3, an operation lever 4 pivotally mounted on the swing body 3 with a lever swing axis L 4, and the swing body 3 and the operation lever 4. One end 5a is pivotally attached to the operating lever 4 with a stub pivot axis L5, and the other end 5b is slidable along the longitudinal direction N of the grip portion 22. A stub member 5 held in a guide groove 23 provided in the body body 2, a stub pivot shaft 50 that pivotally attaches an intermediate portion of the operation lever 4 and one end portion 5 a of the stub member 5, and a base end portion of the body body 2 And the other end of the stub member 5 adjustment screw 6 for adjusting the position of b, release lever 7 pivotally attached to the operating lever 4 by means of a pivoting shaft 71, one end part attached to the swinging body 3, and the other end part attached to the body body 2. A tension coil spring 8 that is always attached to the movable jaw 31 (mouth portion 11) in the direction in which the movable jaw 31 is opened and is elastically urged to oscillate the oscillating body 3; And a torsion coil spring 70 for returning the release lever.

Then, the fixed jaw portion 21 and the movable jaw portion 31 form a mouth portion 11 for gripping the screwing member K. On the opposite surface side of the fixed jaw portion 21 and the movable jaw portion 31, the screwing member K is formed. Each of which has one V-shaped valley portion 11a for gripping the hexagonal gripped portion Ka.
In the V-shaped valley portion 11a, the opening angle θ is set to 110 degrees or more and 130 degrees or less so as to correspond to the hexagonal gripping portion Ka.

  Here, the screwing member K is a member having a female screw part or a male screw part. For example, a bolt or nut, a caster having an upwardly protruding mounting male screw part (bolt part), or a female screw part ( Metal fittings having a nut portion) and pipe joints. Note that the hexagonal gripping portion Ka in the illustrated example is the head of a hexagonal bolt.

The vice plier 1 has a mouth adjustment mechanism (clamp size adjustment mechanism) that can set the jaw separation dimension between the fixed jaw 21 and the movable jaw 31.
The mouth adjusting mechanism includes a female screw portion 24 of the body body 2, an adjusting screw 6, a stub member 5, an operation lever 4, an oscillator 3, a lever pivot shaft 40, a stub pivot shaft 50, By adjusting the position of the other end portion 5 b of the stub member 5 in the longitudinal direction N of the grip portion 22 by reciprocating the adjustment screw 6, the lever pivot is provided via the stub pivot shaft 50 and the operation lever 4. The landing shaft 40 (lever swing axis L4) is moved closer to or away from the fixed jaw 21 to swing the swing body 3 about the jaw swing axis L3, so that the movable jaw 31 is moved relative to the fixed jaw 21. This is a mechanism in which the jaw separation dimension is set and the grippable size (clamp size) is adjustable.

Note that the jaw separation dimension of the fixed jaw 21 and the movable jaw 31 is fixed to a predetermined value so that the grippable size can be one size or a predetermined number of sizes (cannot be adjusted). In the case of a dedicated tool, the adjustment screw 6 may be fixed at a predetermined position so that the screw cannot be advanced or retracted in the manufacturing process of the screw advance / retreat tool, or the opening adjustment mechanism may not be provided. That is, in the present invention, the vice plier portion 1 includes a portion that does not include a mouth portion adjusting mechanism.
When the mouth adjusting mechanism is not provided, the female screw portion 24, the adjusting screw 6 and the lock nut 60 are omitted, and the other end portion 5b of the stub member 5 and the body main body 2 are pivoted with a pivot shaft. What is necessary is just to provide the contact part which the other end part 5b of the stub member 5 contact | abuts to the support or the body main body 2. FIG.

Furthermore, the vice plier portion 1 has a clamp holding mechanism 10 that can hold the screw member K in a gripped state.
The clamp holding mechanism 10 is an end that is the tip of an adjustment screw 6 that contacts the operation lever 4, the stub member 5, the lever pivot shaft 40, the stub pivot shaft 50, and the other end 5 b of the stub member 5. And a support point (contact point between the other end portion 5b of the stub member 5 and the adjusting screw 6) P and a lever swing axis (point) in a side view. ) When a straight line connecting L4 is referred to as a virtual straight line J, the stub pivoting axis (point) L5 in the side-opened state of FIG. It is configured to be arranged at a position away from 22). As shown in FIG. 2, the stub pivot axis (point) L5 exceeds the virtual straight line J in a side view in a gripping state in which the operating lever 4 is gripped together with the grip portion 22 and the screwing member K is clamped. The stub pivot axis L5 is disposed between the body body 2 and the virtual straight line J beyond the so-called dead point. This is a mechanism that can hold the gripping state.

  Accordingly, the vice plier unit 1 holds the operation lever 4 together with the grip portion 22 (closes the operation lever 4) so that the mouth portion 11 in the opened state corresponds to the gripped portion Ka of the screwing member K. Even if the mouth portion 11 clamps the gripped portion Ka and the operator releases the operation force by releasing the hand from the grip portion 22 and the operation lever 4, the gripping state is maintained (the clamp holding state is established). .

Although not shown, when the other end portion 5b of the stub member 5 is pivotally supported on the body main body 2 with a pivot shaft, the clamp holding mechanism 10 has the pivot shaft at the end. It becomes the part support part 90, and the other end part 5b of the stub member 5 and the pivot axis of the body main body 2 become the support point P.
Although not shown in the drawings, when the stub contact portion is provided in the body body 2 without providing the mouth adjustment mechanism, the clamp holding mechanism 10 has an end support portion 90 as the contact portion, and the contact portion and the stub. A contact point with the other end 5 b of the member 5 is a support point P.

  And the balance arm part 9 is provided along the longitudinal direction N of the grip part 22 (body main body 2) from the front-end | tip part of the fixed jaw part 21. As shown in FIG. In other words, the entire tool shape is formed in a substantially single letter shape in the gripping state.

The balance arm portion 9 is made of metal, and preferably iron or stainless steel.
Moreover, the balance arm part 9 is strip-shaped, and the thickness dimension is desirably set to 5 mm or more and 15 mm or less. If it is less than 5 mm, sufficient strength and rigidity cannot be obtained and the usability is deteriorated and the durability is lowered. If it exceeds 15 mm, the overall weight becomes too large and a large working space is required.

Further, as shown in FIG. 2, in the clamp holding state, the arm side longitudinal dimension S9 from the axis Lk of the screwing member K (the threaded portion thereof) to the tip of the balance arm portion 9 is changed from the axis Lk to the vice plier portion. 1 to 0.8 times the pliers-side longitudinal dimension S1 up to the base end of 1.
By setting in this way, the operator grasps the balance arm part 9 and the vice plier part 1 with both hands, so that a large operating force can be easily applied and the screwing member K can be finally tightened easily. Can do. That is, it is used together with the final fastening grip part (pattern part).

Further, the band plate-like side surface 9a of the balance arm portion 9 is used in combination with an identification display portion for displaying identification information such as characters, symbols, colors and the like meaning the screwing member K that can be clamped.
It means the size and standard of the corresponding screw member K standard (nut shape, bolt head or screw part), or the name of the corresponding screw member K (for φ50 caster, φ100 caster, etc.). , Letters, numbers, and symbols are used as parts to be displayed by description, engraving, sticking a sticker, or the like. In addition, colors corresponding to each size, standard, name, etc. are set, and the set colors are displayed by applying paint, plating, or the like.
In this way, when multiple types of working tools for screwing / retreating according to the present invention are provided so that multiple types of screwing members K of different sizes and standards can be accommodated, selection errors (mistakes) ) Can be prevented.

Next, an embodiment of the working tool for screw retraction according to the present invention will be described.
As shown in FIG. 1, the mouth portion 11 in the mouth opening state is approached from the side (radial direction) of the screwing member K, inserted into the mouth portion 11 to correspond, and the operation lever 4 is moved together with the grip portion 22. 2. Grasp and hold as shown in FIG.
In the case of screwing, the screwing member K is slightly screwed into the mating screwing member before or after gripping (about one thread).

Then, as shown in FIG. 3, while holding the screwing member K in a gripping state, a rotational operation force (momentum) F that is screwed or screwed is applied to the vice plier part 1 or the balance arm part 9. If the operator releases the hand immediately after that, the balance arm portion 9 and the vice plier portion 1 continue to rotate like a propeller around the axis Lk of the screwing member K due to inertial force, and the screwing member K is screwed. Or retreat.
That is, it is not necessary to repeatedly perform a swinging operation like a wrench, and the screwing or screwing work is performed even if the worker is in a state of letting it go.

  The balance arm portion 9 keeps the balance when the rotation is applied (during screw rotation or screw rotation) (dynamic balance is achieved), the rotation is stabilized, and the rotation operation force F is applied once. The screwing member K rotates a plurality of times only by applying.

  In addition, when the rotation is applied and screwed, when the tightening end surface of the screwing member K contacts the tightening end surface of the mating screwing member, the final tightening can be performed by the rotational force (inertial force). . That is, the screwing operation and the final tightening operation can be performed by rotation. Alternatively, the final tightening operation is performed with a strong force by grasping both the balance arm portion 9 and the vice plier portion 1 (using the right hand and the left hand). Moreover, the screwing member K fastened with a strong force can be screwed back with a strong torque.

Next, another embodiment will be described.
As shown in FIG. 4, the balance arm portion 9 is continuously extended from the movable jaw portion 31. With this configuration, a large inertial force is applied to the balance arm portion 9 when the vice plier portion 1 is gripped with the right hand and then rotated clockwise (see FIG. 3). However, since it acts in the direction of closing the movable jaw 31, it is possible to prevent unintentional detachment due to rotational force. Other configurations and operational effects are the same as those of the above-described embodiment.

  In the present invention, the design can be changed, and a relief portion corresponding to the corner portion of the hexagonal gripping portion Ka is provided at the bottom of the V-shaped valley portion 11a. Good (may be formed so that a pair of slopes forming a V-shape are in direct contact). The shape of the clamp part (clamp surface) of the fixed jaw part 21 and the movable jaw part 31 is not limited to the V-shaped valley type, but a saw blade type (zigzag type) having a plurality of peaks and valleys alternately, It may be planar (one letter when viewed from the side). The release lever 7, the torsion coil spring 70 for returning the release lever, and the lock nut 60 may be omitted.

  As described above, the working tool for screw retraction according to the present invention is a clamp that can hold the fixed jaw portion 21, the movable jaw portion 31, the grip portion 22, the operation lever 4, and the screwing member K in a gripping state. And a balance arm portion for maintaining a balance when the screw member is rotated while being screwed or screwed while being held in a gripping state. 9 is provided so as to extend from the tip of the fixed jaw 21 or the movable jaw 31, so that the balance arm 9 and the vice plier 1 are like propellers around the shaft center Lk of the screwing member K by inertial force. By continuing to rotate, the screwing or screwing operation can be performed by hand. In particular, it is most suitable for screwing work such as caster mounting work in the manufacture (mass production) of shopping carts and carts. Further, it is most suitable for work with a long screw advance / retreat stroke such that nuts are screwed onto all screw bolt members of pipes and wires. Unlike the spanner, it is not necessary to repeatedly perform the swinging operation, and the screw advance / retreat operation can be performed efficiently and easily. The balance arm portion 9 provides a dynamic balance to stabilize the rotation, and can be rotated many times with a slight operating force. It is also possible to perform the final tightening operation with a strong force by gripping both the balance arm portion 9 and the vice plier portion 1. Moreover, it can approach and hold from the side surface side (radial direction) of a screwing member.

  Further, since the fixed jaw portion 21 and the movable jaw portion 31 have the V-shaped valley portions 11a for gripping the screwing member K on the opposite surface side, the fixed jaw portion 21 and the movable jaw portion 31 are provided. And the hexagonal gripping portion Ka can be engaged and pressed, and slippage between the mouth 11 of the vice plier portion 1 and the hexagonal gripping portion Ka can be prevented. Even if a strong centrifugal force acts on the rotating vice plier portion 1, it is possible to prevent the screwing member K from being unexpectedly detached from the mouth portion 11, and to work safely. A strong torque can be applied to the gripped portion Ka during the final tightening.

1 Vice Plier 4 Operation Lever 9 Balance Arm
10 Clamp holding mechanism
11a V-shaped valley
21 Fixed jaw
22 Grip part
31 Movable jaw
F rotation operating force K screwing member

Claims (2)

Clamp holding mechanism (10) that can hold the fixed jaw (21), the movable jaw (31), the grip (22), the operation lever (4), and the screwing member (K) in a gripping state. And a vice plier part (1) having
Further, a balance for obtaining a dynamic balance when rotating by inertial force by applying a rotational operation force (F) for screwing or screwing while holding the screwing member (K) in a gripping state. A working tool for screwing and retreating, characterized in that an arm portion (9) is provided extending from the tip of the fixed jaw portion (21) or the movable jaw portion (31). The screw advance / retreat work tool according to claim 1, wherein the balance arm portion (9) has a metal strip shape and has a thickness dimension set to 5 mm or more and 15 mm or less .

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