JP4743216B2 - Locking pliers - Google Patents

Description

  The present invention relates to a locking pliers provided for twisting and assembling a torsion bar in an opening / closing mechanism such as a trunk lid of a vehicle.

  2. Description of the Related Art Conventionally, trunk lids used in vehicles such as automobiles are slightly urged by a torsion bar so that the trunk lid is slightly opened when the lock is released and the trunk lid can be easily operated. In the work of assembling the torsion bar to the vehicle, the assembling work is performed against a large reaction force generated from the torsion bar in a narrow work space. Since this assembling work requires a lot of labor and working time, a tool that can effectively perform the assembling work of the torsion bar is required.

  FIG. 6 is a perspective view showing a mounting state of a conventional torsion bar. This figure corresponds to the perspective view shown as FIG. As shown in FIG. 6, the hinges 13 and 14 are pivotally attached to brackets 11 and 12 coupled to the vehicle body side such as parcel shelves (not shown) at the base ends, and trunk lids (not shown) at the swing ends. ). The two torsion bars 15 and 16 have the same shape and are attached to the opposite sides. The torsion bars 15, 16 have U-shaped ends 15 a, 16 a at one end fixed to one bracket 11, 12 and cross each other in the middle, and the U-shaped portions 15 b, 16 b at the other end are connected to the other hinge 14 or 13. Fixed to. The U-shaped portions 15b and 16b are also called crank portions. The torsion bars 15 and 16 have either one of the U-shaped end portions 15a and 16a and the U-shaped portions 15b and 16b attached first, and the other attached, for example, in a twisted state of 120 degrees. This twisting biases the hinges 13 and 14 in the direction to open the trunk lid (not shown). Regarding the attaching procedure of the torsion bars 15 and 16, when the U-shaped portions 15b and 16b are attached first, the U-shaped end portions 15a and 16a must be twisted and attached. As a tool to be used, FIG. 14 of Patent Document 1 discloses a tool suitable for the tool.

  FIG. 7 is a perspective view showing a mounting state of a conventional torsion bar different from FIG. This figure corresponds to the perspective view shown as FIG. As shown in FIG. 7, the hinges 17a and 17b are pivotally attached to brackets (not shown) coupled to the vehicle body side such as parcel shelves (not shown) at the base ends, and trunk lids (see FIG. 7). (Not shown). A pair of torsion bars 19 for urging the trunk lid in the opening direction have U-shaped end portions 19a and 19b having the same shape symmetrically with respect to both ends, and are attached oppositely on the left and right sides. One end of the torsion bar 19 is fixed to a bracket (not shown), crosses each other in the middle, and the other end is fixed to the hinge 17a or 17b. The torsion bar 19 is also attached in a state in which the U-shaped end portions 19a and 19b on the side to be attached later are twisted by 120 degrees, for example. At this time, a setting jig is disclosed in FIG. 1 of Patent Document 2 as a tool for attaching the U-shaped end portions 19a and 19b to a state in which the U-shaped end portions 19a and 19b are twisted, for example, 120 degrees.

  FIG. 8 is a perspective view showing a mounting state of a conventional torsion bar different from FIGS. 6 and 7. This figure corresponds to the figure shown as FIG. As shown in FIG. 8, the hinge 20 is pivotally attached to a bracket (not shown) whose base end is coupled to the vehicle body such as a parcel shelf (not shown), and the swing end is a trunk lid (not shown). ). A pair of torsion bars 21 for biasing the trunk lid in the opening direction has special U-shaped portions 21a at both ends. In the figure, only one side of one torsion bar is shown. In the torsion bar 21, a special U-shaped portion 21a includes an adjacent portion 21b, and is connected to a linear central portion 21c via this. The torsion bar 21 is also attached in a state where the special U-shaped portion 21a on the side to be attached later is twisted by 120 degrees, for example. At this time, an assembly jig is disclosed in FIG. 3 of Patent Document 3 as a tool for attaching the special U-shaped portion 21a to a state in which the special U-shaped portion 21a is twisted, for example, 120 degrees.

JP 09-323676 A Japanese Utility Model Publication No. 07-33536 Japanese Patent Laid-Open No. 10-236337

  However, the tool shown in FIG. 14 of Patent Document 1 is a torsion tool corresponding to the U-shaped end portions 15a and 16a, and the attachment procedure of the torsion bars 15 and 16 cannot be changed. That is, it is not possible to change the procedure for attaching the U-shaped portions 15b and 16b in a state where the U-shaped portions 15b and 16b are twisted 120 degrees after the U-shaped end portions 15a and 16a are attached first. Therefore, it is not applicable to the torsion bar 19 (see FIG. 7) shown in Patent Document 2. Further, when the diameters of the torsion bars are different, it is not suitable for use. On the other hand, the setting jig shown in FIG. 1 of Patent Document 2 is a torsion tool corresponding to the U-shaped end portions 19a and 19b, and cannot correspond to the U-shaped portions 15b and 16b (see FIG. 6) of Patent Document 1. . Also in this case, it is not suitable for use when the diameters of the torsion bars are different. 3 is applicable only to the special U-shaped portion 21a (see FIG. 8), and the torsion bars 15 and 16 (see FIG. 6) shown in Patent Document 1 and Patent Document 2 It cannot be applied to the torsion bar 19 shown (see FIG. 7).

  Therefore, the use of a locking pliers was examined as a tool applicable to both the U-shaped end portion and the U-shaped portion of the torsion bar, that is, the crank portion. FIG. 9 is a front view showing a state in which an operation lever is closed in a conventional locking pliers. The locking pliers 30 can adjust the distance between the fixed jaw portion 32 and the movable jaw portion 33 when the adjustment bolt 31 is adjusted, and the swinging body 34, the operation lever 35, and the stub shaft 36 can Therefore, when the operation lever 35 is closed with respect to the oscillating body 34, the fixed jaw portion 32 and the movable jaw portion 33 are closed with a large force.

  However, no matter how strong the torsion bar can be clamped by the locking pliers 30, a large torque that can twist the torsion bar cannot be generated. Therefore, the locking pliers are improved so that a large torque can be applied to the torsion bar.

  In view of the above problems, an object of the present invention is to provide a locking pliers that can apply a large torque to both the U-shaped end portion and the U-shaped portion of a torsion bar.

  In order to achieve the above object, a locking plier according to the present invention has an operation lever pivotally attached to a rocking body pivotally attached to a plier body, and a stub shaft pivotally attached to the operation lever in an opened state. It is locked with an adjustment bolt provided on the main body, and the distance between the movable clamp surface of the rocking body and the fixed clamp surface of the pliers main body is set. A locking pliers in which the movable clamp surface is closed to the fixed clamp surface of the pliers body, and a block is integrally projected on the side surface of the fixed jaw portion of the pliers body, and the groove direction is in front of the protruding direction of the block. Has a U-groove that coincides with the longitudinal direction of the pliers body, and is integrally formed with a rectangular protrusion that protrudes forward in the longitudinal direction of the pliers body from the back surface of the fixed jaw portion of the pliers body. To. The U-shaped portion may be called a crank portion.

  According to the present invention, a large torque can be applied to both the U-shaped end portion and the U-shaped portion of the torsion bar.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 to 3 show a locking pliers according to an embodiment of the present invention, FIG. 1 is a front view showing a state where an operation lever is closed, FIG. 2 is a front view showing a state where the operation lever is opened, and FIG. 3 is a view taken in the direction of arrows III-III in FIG.

  As shown in FIGS. 1 to 3, the locking pliers 40 according to the embodiment of the present invention include an adjustment bolt having a stub shaft 44 pivotally attached to the operation lever 43 with the operation lever 43 opened. The distance between the movable clamp surface of the rocking body 42 and the fixed clamp surface of the pliers body 41 is set. Therefore, when the operation lever 43 is closed, a boosting action is generated, and the movable clamp surface of the rocking body 42 is closed to the fixed clamp surface of the pliers body 41.

  Unlike conventional ones, the locking pliers 40 include a sandwiching block 46, a block 47 having a U-groove 47a, and a square protrusion 48 having a U-groove 48a on the front side. Therefore, the locking pliers 40 can twist the torsion bar by generating a large torque with respect to the U-shaped portion of the torsion bar, as will be described later with reference to FIG. By providing the angular protrusions 48 that form the U-grooves 48a, the torsion bar can be twisted by generating a large torque with respect to the U-shaped end of the torsion bar, as will be described later with reference to FIG. . The clamping block 46 is provided on the movable clamp surface 42a as necessary, and can clamp the torsion bar with the fixed clamp surface 41b.

This will be specifically described below.
As shown in FIGS. 1 to 3, the locking pliers 40 are the same as those in FIG. 9 in that they include a plier body 41, a rocking body 42, an operation lever 43, a stub shaft 44, and an adjustment bolt 45. 46, a block 47 having a U groove 47a, and a square protrusion 48 that forms a U groove 48a on the front side.

  In the plier main body 41, one side surface of the fixed jaw portion 41a at the distal end is a fixed-side clamp surface 41b and the proximal end side is a fixed-side grip portion 41c.

  The oscillating body 42 has a symmetrical shape with respect to the fixed jaw portion 41a, and has a proximal end pivotally attached to a midway portion near the fixed jaw portion of the pliers body 41 by a first pin shaft 49 and faces the fixed-side clamp surface 41b. The clamping block 46 protrudes integrally with the movable clamp surface 42a.

  The operation lever 43 has a distal end portion 43a pivotally attached to the oscillating end edge of the oscillating body 42 by a second pin shaft 50, and a proximal end side is a movable side grip portion 43b corresponding to the fixed side grip portion 41c. .

  The stub shaft 44 has a distal end pivotally attached by a third pin shaft 51 in the middle of the operation lever 43, and a proximal end slidably engaged with the guide groove 41c ′ of the fixed-side grip portion 41c of the plier body 41, and The sliding of the pliers main body 41 in the proximal direction is stopped at the distal end of the adjustment bolt 45 that is screwed into the female thread portion 41d provided at the proximal end portion of the fixed-side grip portion 41c and extends to the guide groove 41c ′. It is sufficient that the base end of the slidable stub shaft 44 and the tip of the adjustable bolt 45 that can be screwed are engageable.

  The block 47 has a U-groove 47 a that protrudes integrally with the side surface portion of the fixed jaw portion 41 a of the plier main body 41 and whose groove direction coincides with the longitudinal direction of the plier main body 41 in front of the protruding direction of the block 47. The U groove 47a is configured so that it can be fitted into the torsion bar.

  The angular protrusion 48 is provided integrally from the back surface of the fixed jaw 41a of the plier body 41, that is, the surface opposite to the fixed clamping surface 41b, and protrudes in the shape of a rectangle forward in the longitudinal direction. A U-groove 48a for receiving a torsion bar extending in a lateral direction, that is, a direction orthogonal to the longitudinal direction of the plier main body 41 is provided between the back surface portion of 41a.

  As shown in FIG. 2, the locking pliers 40 configured as described above have the movable clamp surface 42a opened with respect to the fixed clamp surface 41b when the operation lever 43 is opened, and the stub shaft 44 is The plier main body 41 has a large angle. As the operation lever 43 is closed, the stub shaft 44 falls down in the longitudinal direction of the plier body 41, and the oscillating body 42 pivots greatly by the displacement of the stub shaft 44, and the movable side clamp surface 42a becomes the fixed side clamp surface 41b. It becomes almost parallel and stops. At this time, if the gap S between the clamping block 46 and the fixed clamp surface 41b is smaller than the diameter of the torsion bar, the torsion bar can be clamped. When the adjusting screw 45 is screwed deeply, the gap S is further reduced, and when it is screwed shallowly, the gap S is increased. Therefore, when the torsion bar diameters are different, the torsion bar can be clamped by adjusting the adjusting screw 45.

Next, a usage pattern will be described.
[Usage example 1]
FIG. 4 is a diagram illustrating a process of twisting the torsion bar by engaging the locking pliers 40 with the U-shaped portion 61 of the torsion bar 60.
First, as shown in FIG. 4 (a), the clamping block 46 and the fixed clamp surface 41b clamp the adjacent portion of the torsion bar 60 avoiding the U-shaped portion 61, and the U-groove 47a of the block 47 is connected to the torsion bar. Engage with the 60 U-shaped portion 61.
Next, as shown in FIG. 4 (b), when closing the operating lever 43 turns in the direction of arrow X _1, the direction in which the operating lever 43 is closed to the pliers body 41, it is added to rotating force to the operating lever 43 it can. At this time, the clamping block 46 and the fixed clamp surface 41 b are kept closed, and the rotational force can be transmitted to the U-shaped portion 61 on the side surface of the U groove 47 a of the block 47. Therefore, the torsion bar 60 can be twisted by generating a large torque with respect to the U-shaped portion 61 of the torsion bar 60.

[Usage example 2]
FIG. 5 is a diagram showing a process of twisting the torsion bar by engaging the locking pliers 40 with the U-shaped end portion 63 of the torsion bar 62.
First, as shown in FIG. 5A, the clamping block 46 and the fixed clamp surface 41b clamp one parallel portion of the U-shaped end portion 63 of the torsion bar 62, and the U-shaped groove of the angular protrusion 48 The other parallel part of the U-shaped end part 63 is engaged with 48a.
Next, as shown in FIG. 5 (b), when closing the operating lever 43 turns in the direction of arrow X _2, in the direction the operating lever 43 is closed to the pliers body 41, applying a rotational force to the operating lever 43 Can do. At that time, the clamping block 46 and the fixed-side clamp surface 41 b are kept closed, and the rotational force can be transmitted to the U-shaped end portion 63 through the U-shaped groove 48 a of the rectangular protrusion 48. Therefore, the torsion bar 62 can be twisted by generating a large torque with respect to the U-shaped end portion 63 of the torsion bar 62.

  As described above, according to the locking pliers 40 according to the embodiment of the present invention, a large torque can be applied to both the U-shaped end portion 63 and the U-shaped portion 61 of the torsion bars 60 and 62, that is, the crank portion.

  The present invention is not limited to the above-described embodiment, and includes various modifications of the design within the technical scope without departing from the gist of the invention described in the claims. The scope of the present invention also includes a case in which a lever for releasing the operation lever is provided or a spring for connecting the vicinity of the operation lever to the stub shaft and the pliers main body is attached. When the clamping block 46 is not provided, the oscillating body may be designed so that the movable side clamping surface is brought close to the fixed side clamping surface.

It is a front view which shows the state which the operation lever closed about the locking pliers which concern on embodiment of this invention. It is a front view which shows the state which the operation lever opened about the locking pliers which concern on embodiment of this invention. It is a III-III arrow line view in FIG. It is a figure which shows the process of engaging the locking pliers shown in FIG. 1 with the U-shaped part of a torsion bar, and twisting a torsion bar. It is a figure which shows the process of engaging the locking pliers shown in FIG. 1 with the U-shaped end part of a torsion bar, and twisting a torsion bar. It is a perspective view which shows the attachment state of the conventional torsion bar. It is a perspective view which shows the attachment state of the conventional torsion bar different from FIG. It is a perspective view which shows the attachment state of the conventional torsion bar different from FIG.6 and FIG.7. It is a front view which shows the state which the operation lever closed about the conventional locking pliers.

Explanation of symbols

40 Locking pliers 41 Plier main body 41a Fixed jaw portion 41b Fixed side clamp surface 41c Lever portion 41c 'Guide groove 41d Female thread portion 42 Oscillator 42a Movable side clamp surface 43 Operation lever 43a Tip portion 43b Movable side grip portion 44 Stub shaft 45 Adjustment bolt 46 sandwiching block 46a U groove 47 block 47a U groove 48 angular protrusion 48a U groove 49 first pin shaft 50 second pin shaft 51 third pin shaft 60, 62 torsion bar 61 U-shaped portion 63 U-shaped end Part

Claims (1)

An operating lever is pivotally attached to an oscillating body pivotally attached to the pliers main body, and a stub shaft pivotally attached to the operating lever is locked with an adjusting bolt provided on the pliers main body in a state in which the operating lever is opened, A separation distance between the movable clamp surface of the moving body and the fixed clamp surface of the pliers body is set, and when the operation lever is closed, a boosting action is generated and the movable clamp surface of the oscillating body is Locking pliers that close to the clamp surface on the fixed side,
A block is integrally formed on the side surface of the fixing jaw portion of the pliers body, and a U-groove is formed in front of the block in the protruding direction so that the groove direction coincides with the longitudinal direction of the pliers body. A rocking plier integrally including a square protrusion protruding from the back surface of the jaw part forward in the longitudinal direction of the plier body.

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