Holding tool

Abstract

To provide a clamping tool capable of performing a removal operation while firmly clamping a coupler located in a direction intersecting the extending direction of a gripping part. [Solution] A clamping tool 10 includes a first clamping member 20 having a first jaw 22 at a tip 20a, a second clamping member 30 having a second jaw 32 at a tip 30a, and a connecting shaft 40 rotatably connecting the first clamping member 20 and the second clamping member 30 to each other. The first clamping member 20 has a first arm portion 21 having the first jaw 22 and a first gripping portion 23 extending in the longitudinal direction Y, and the second clamping member 30 has a second arm portion 31 having the second jaw 32 and a second gripping portion 33 extending in the longitudinal direction Y, and the first arm portion 21 of the first clamping member 20 and the second arm portion 31 of the second clamping member 30 extend while bending in the width direction Z.

Description

[Technical field]

[0001] This invention relates to a clamping tool used when removing a coupler, which is a connecting part for electronic parts located in the engine compartment of an automobile or the like. [Background technology]

[0002] Conventionally, clamping tools such as pliers and pincers are well known. For example, Patent Document 1 discloses a clamping tool configured by connecting a pair of open / close clamping members having action parts at their tips with a connecting pin at their intersecting portions. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 59-136260 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the clamping tool disclosed in Patent Document 1, by opening and closing a pair of clamping members, an object can be clamped by an action portion located at the tip.

[0005] When servicing an automobile, couplers, which are the parts that connect electronic components in the engine compartment, may be removed to prevent burning due to vibration of the contacts, burning and rusting due to the accumulation of dust and debris, and rust and corrosion due to moisture.

[0006] At that time, if the coupler is positioned in a direction that intersects with the part that the worker is gripping, the coupler cannot be clamped properly.

[0007] The object of the present invention is to provide an improvement over conventional clamping tools, which is capable of performing removal operations while firmly clamping a coupler located in a direction intersecting the extension direction of the gripping portion. [Means for solving the problem]

[0008] The present invention relates to a clamping tool including a first clamping member having a longitudinal direction, a width direction, and a lateral direction that intersect with each other and having a first jaw portion at a tip, a second clamping member having a second jaw portion at a tip, and a connecting shaft that rotatably connects the first clamping member and the second clamping member to each other.

[0009] The clamping tool of the present invention is characterized in that the longitudinal dimension of the first clamping member is smaller than the longitudinal dimension of the second clamping member, and the tip of the first clamping member is located rearward of the tip of the second clamping member.

[0010] The clamping tool according to the present invention has the following preferred embodiments. (1) The first jaw portion of the first clamping member has a shape bent inward in the width direction, and the second jaw portion of the second clamping member is approximately semicircular and protrudes inward in the width direction, and its tip edge has a sawtooth shape consisting of a plurality of grooves and a plurality of protrusions arranged alternately in the lateral direction. (2) The lateral dimension of the first jaw of the first clamping member is smaller than the lateral dimension of the second jaw of the second clamping member. (3) The second clamping member has a recess located rearward of the second jaw portion, and when the first clamping member and the second clamping member extend parallel to each other in the longitudinal direction, the tip of the first clamping member is located in the recess of the second clamping member. Effect of the Invention

[0011] In one or more embodiments of the clamping tool of the present invention, the dimension L1 in the longitudinal direction Y of the first clamping member 20 is smaller than the dimension L2 in the longitudinal direction Y of the second clamping member 30, and the tip 20a of the first clamping member 20 is located rearward of the tip 30a of the second clamping member 30. [Brief description of the drawings]

[0012] The drawings show specific embodiments of the invention according to the present disclosure, including essential features of the invention as well as alternative and preferred embodiments. [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] (a) is a plan view of the clamping tool, and (b) is a bottom view of the clamping tool. [Diagram 5] 1A is an exploded perspective view of the clamping tool as viewed from above, and FIG. [Figure 6] An enlarged view of a portion of the clamping tool. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The clamping tool 10 according to the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments include not only essential features of the present invention, but also features that can be selectively adopted and features that can be appropriately combined.

[0014] 1 to 3, a clamping tool 10 according to the present invention has a longitudinal direction (front-rear direction) Y, a width direction Z and a lateral direction X that intersect with each other, and includes first and second clamping members 20, 30, first and second gripping parts 23, 33, and a connecting shaft 40 that connects the first and second clamping members 20, 30 to each other. Note that, with a center point (rotation axis) P of the connecting shaft 40 as a reference, the second clamping member 30 side of the center point P is referred to as the inside in the width direction Z, and the first clamping member 20 side of the center point P is referred to as the outside in the width direction Z.

[0015] The first clamping member 20 further has a leading end 20a and a trailing end 20b positioned opposite each other in the front-rear direction Y, a first arm portion (arm portion) 21 located on the leading end 20a side, a first jaw portion 22 located on the leading end 20a side, a first gripping portion 23 located on the trailing end 20b side, and a first connecting portion 24 located at the base end of the first arm portion 21. The first gripping portion 23 has a curved shape and extends from the base end of the first arm portion 21 so as to be misaligned in the width direction Z.

[0016] Moreover, the first arm portion 21 of the first clamping member 20 has a bent shape. Specifically, the first arm portion 21 has a bent portion 21a in the vicinity of the connecting shaft 40, extends slightly from the connecting shaft 40 in the longitudinal direction Y, and then extends outward in the width direction Z from the bent portion 21a.

[0017] The second clamping member 30 further has a front end 30a and a rear end 30b positioned opposite each other in the front-rear direction Y, a second arm portion (arm portion) 31 located on the front end 30a side, a second jaw portion 32 located on the front end 30a side, a second gripping portion 33 located on the rear end 30b side, and a second connecting portion 34 located at the base end of the second arm portion 31. The second gripping portion 33 has a curved shape and extends from the base end of the second arm portion 31 so as to be misaligned in the width direction Z.

[0018] Further, the second arm portion 31 of the second clamping member 30 has a bent shape. Specifically, the second arm portion 31 has a bent portion 31a in the vicinity of the connecting shaft 40, extends slightly from the connecting shaft 40 in the longitudinal direction Y, and then extends from the bent portion 31a in the width direction Z.

[0019] The bent portion 21a of the first clamping member 20 and the bent portion 31a of the second clamping member 30 are positioned opposite to each other in the width direction Z, and it can be said that the first clamping member 20 and the second clamping member 30 are bent and extend in the width direction X intersecting the longitudinal direction Y in which the first and second gripping portions extend. In a conventional clamping tool, the portions corresponding to the first and second clamping members 20, 30 extend linearly in the longitudinal direction Y, whereas the clamping tool 10 according to the present invention has a shape significantly different from that of a conventional clamping tool in that the first and second clamping members 20, 30 have a bent shape.

[0020] The first connecting portion 24 of the first arm portion 21 of the first clamping member 20 has a generally circular shape that is concave outward in the lateral direction X, and has a first axial hole 25 located in the center, a first mating recess 26a located on the outside in the width direction Z, and a first mating convex portion 26b located on the inside in the width direction Z.

[0021] 4(a), (b) and 5(a), (b), the second connecting portion 34 of the second arm portion 31 of the second clamping member 30 has a generally circular shape that convex inward in the lateral direction X, and has a second shaft hole 35 located at the center, a second mating recess 36a located on the inside in the width direction Z, and a second mating convex portion 36b located on the outside in the width direction Z. The second mating recess 36a of the second clamping member 30 has a shape that follows the first mating convex portion 26b of the first clamping member 20, and the second mating convex portion 36b has a shape that follows the first mating recess 26a.

[0022] The first connecting portion 24 of the first clamping member 20 and the second connecting portion 34 of the second clamping member 30 can be engaged with each other by engaging the first mating recess 26a with the second mating protrusion 36b, and the first mating protrusion 26b with the second mating recess 36a, respectively. In this engaged state, no step is formed between the connecting portion between the first arm portion 21 and the second mating protrusion 36b of the second arm portion 31 and the connecting portion between the second arm portion 31 and the first mating protrusion 26b of the first arm portion 21, and their outer surfaces are substantially flush in the longitudinal direction Y.

[0023] The connecting shaft 40 has a locking portion 41 that comes into contact with the second clamping member 30, and a shaft portion 42 that extends from the locking portion 41. In addition, the connecting shaft 40 is optionally provided with a spring 5 for constantly biasing the first clamping member 20 and the second clamping member 30 in a direction that brings them closer to each other.

[0024] With the first connecting portion 24 of the first clamping member 20 and the second connecting portion 34 of the second clamping member 30 engaged with each other, the first shaft hole 25 and the second shaft hole 35 communicate with each other in the lateral direction X, and the shaft portion 42 of the connecting shaft 40 is inserted therethrough, thereby rotatably connecting the first clamping member 20 and the second clamping member 30 to each other. The connecting shaft 40 is fixed by crimping the tip of the shaft portion, but the fixing manner is not limited to this.

[0025] The first jaw 22 located at the tip 20a of the first clamping member 20 has a shape bent inward in the width direction Z, and has a flat tip edge. The second jaw 32 located at the tip 30a of the second clamping member 30 has a substantially semicircular shape protruding inward in the width direction Z, and its tip edge 32a has a sawtooth shape consisting of a plurality of grooves and a plurality of protrusions alternately arranged in the lateral direction X. A recess 38 is located behind the second jaw 32 of the second arm portion 31.

[0026] Referring to Figure 2, the length dimension (dimension in the longitudinal direction Y) L1 of the first clamping member 20 is smaller than the length dimension (dimension in the front-to-rear direction) L2 of the second clamping member 30, and the tip 20a of the first clamping member 20 is located rearward of the tip 30a of the second clamping member 30.

[0027] Furthermore, when the first and second clamping members 20, 30 are in a closed state, i.e., when they extend parallel to each other in the longitudinal direction Y, the tip 20a of the first clamping member 20 is located in the recess 38 of the second clamping member 30. When the clamping tool 10 is in an unused state, the tip 20a of the first clamping member 20 is located in the recess 38 of the second clamping member 30, thereby making it possible to prevent the first clamping member 20 from inadvertently rotating in a direction away from the second clamping member 30.

[0028] Also, referring to FIG. 3, the dimension W2 in the lateral direction X of the second jaw 32 of the second clamping member 30 is larger than the dimension W1 in the lateral direction X of the first jaw 22 of the first clamping member 20, specifically, the dimension W2 is 1.2 to 2.0 times larger than the dimension W1.

[0029] 6, in the second clamping member 30, the length dimension L3 of the portion that bends and extends in the width direction Z is 2.0 to 4.0 times the length dimension L4 of the portion that extends in the longitudinal direction Y from the connecting shaft 40. If the length dimension L3 is less than 2.0 times the length dimension L4, it will be impossible to clamp an object located away from the connecting shaft 40 in the width direction Z, while if the length dimension L3 exceeds 4.0 times the length dimension L4, it will be difficult for the gripping force of the first and second gripping portions 23, 33 to be transmitted to the first and second jaws 22, 32, making it difficult to strongly grip the object.

[0030] In addition, the length dimension L4 of the portion extending from the connecting shaft 40 in the longitudinal direction Y is the length dimension from the center P of the connecting shaft 40 to the end K of the bent portion 31a, and the length dimension L3 of the portion extending bent in the width direction Z means the length dimension from the end K of the bent portion 31 to the tip edge of the tip 30a.

[0031] Moreover, the angle α of the bent portion 21a on the outer surface side of the first clamping member 20 is 100 to 130°. If the angle α is less than 100°, the first and second clamping members 20, 30 will be in a state where they are more upright than in the illustrated state with respect to the first and second gripping portions 23, 33, resulting in reduced operability, whereas if the angle α exceeds 130°, the first and second clamping members 20, 30 will be in a state similar to that of a normal clamping tool 10 that extends linearly in the front-rear direction Y, making it difficult to achieve the technical effect of bending them.

[0032] Referring to FIG. 7, when servicing an automobile, a coupler 50, which is a connection part for electronic components in the engine compartment, may be removed in order to prevent burning due to vibration of the contacts, burning and rusting due to the adhesion of dust and dirt, and rust and corrosion due to moisture.

[0033] According to the clamping tool 10 of the present invention, the first and second arm portions 21, 31 of the first and second clamping members 20, 30 are bent and extend in a direction intersecting the longitudinal direction Y in which the first and second gripping portions 23, 33 extend. Therefore, even if an operator grasps the first and second gripping portions 23, 33 and inserts his or her hands into a relatively narrow space, and the coupler 50 is positioned in a direction intersecting the first and second gripping portions 23, 33, the operator can clamp the coupler 50 with the first and second jaw portions 22, 32 of the first and second clamping members 20, 30 to perform the removal operation.

[0034] Coupler 50 has a distorted shape, and has, for example, a cylindrical tip portion 51 and a relatively narrow protruding portion 52 that extends rearward from tip portion 51 and protrudes upward. When removing such coupler 50 using a clamping tool such as a general pair of pliers, in which a pair of clamping members have the same length, the tip portion is clamped from above and below to remove it, but because the protruding portion is relatively narrow, it is difficult to transmit force, and because the tip portion is cylindrical, the tip of the clamping member is prone to slipping, making it difficult to remove the coupler.

[0035] According to the clamping tool 10 of the present invention, the protrusion portion 52 of the coupler 50 is stably held down by the first jaw 22 of the relatively narrow first clamping member 20, and the second jaw 32 of the relatively wide second clamping member 30, which is located forward of the first jaw 22, is abutted against the base end of the tip portion 51, thereby clamping the first jaw 22 and the second jaw 32 in a misaligned state in the fore-and-aft direction Y, thereby transmitting a sufficient clamping force and making it easy to perform the removal operation.

[0036] In addition, since the tip edge 32a of the second jaw 32 of the second clamping member 30 has a serrated shape, it is less likely to slip even if the protruding portion 52 of the coupler 50 is curved, and since the second jaw 32 is semicircular, it is possible to prevent damage even if part of it comes into contact with an engine, etc.

[0037] The first and second clamping members 20, 30 and the connecting shaft 40 constituting the clamping tool 10 can be made of various known materials such as metals such as iron and stainless steel, hard plastics, etc. In the specification and claims of the present invention, the terms "first" and "second" are used simply to distinguish between similar elements, positions, etc. [Explanation of symbols]

[0038] 10 Clamping tool 20 First clamping member 20a tip 22 First Jaw 30 Second clamping member 30a tip 32 Second Jaw 32a Tip edge 38 Recess 40 Connecting shaft L1: The longitudinal dimension of the first clamping member L2: The longitudinal dimension of the second clamping member L3: Length of the part of the second clamping member that is bent and extends in the width direction L4: The length dimension of the part of the second clamping member extending from the connecting shaft in the longitudinal direction X Horizontal Y Longitudinal direction (front-to-back direction) Z width direction W1: lateral dimension of first jaw W2: lateral dimension of second jaw

Claims

1. A clamping tool including a first clamping member having a longitudinal direction, a width direction, and a lateral direction which intersect with each other and having a first jaw portion at a tip, a second clamping member having a second jaw portion at a tip, and a connecting shaft which rotatably connects the first clamping member and the second clamping member to each other, the first clamping member has a first arm portion having the first jaw portion and a first gripping portion extending in the longitudinal direction, the second clamping member has a second arm portion having the second jaw portion and a second gripping portion extending in the longitudinal direction, A clamping tool, characterized in that the first arm portion of the first clamping member and the second arm portion of the second clamping member are bent and extend in the width direction.

2. The clamping tool according to claim 1, wherein the length dimension of the portion of the second clamping member that is bent and extends in the width direction is 2.0 to 4.0 times the length dimension of the portion that extends in the longitudinal direction from the connecting shaft.

3. 2. A clamping tool as described in claim 1, wherein the longitudinal dimension of the first clamping member is smaller than the longitudinal dimension of the second clamping member, and the tip of the first clamping member is located rearward of the tip of the second clamping member.

4. The clamping tool described in claim 1, wherein the first jaw portion of the first clamping member has a shape bent inward in the width direction, and the second jaw portion of the second clamping member has an approximately semicircular shape protruding inward in the width direction, and its tip edge has a sawtooth shape consisting of a plurality of grooves and a plurality of protrusions arranged alternately in the horizontal direction.

5. 2. A clamping tool as claimed in claim 1, wherein the lateral dimension of the first jaw of the first clamping member is less than the lateral dimension of the second jaw of the second clamping member.

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