JPH0349870Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a tool for gripping and crimping, especially for welding synthetic resin materials in the shape of rods or columns (including hollow ones) such as synthetic resin belts, etc. The present invention relates to a gripping and crimping tool suitable for operations such as adhesion.

(Prior Art) Conventional holding means for welding or adhering the ends of rod-shaped or columnar materials such as synthetic resin belts include, for example: (1) rod-shaped or columnar synthetic resin materials cut to a predetermined length; Both ends are held with both hands, the end faces are brought into contact with a hot plate surface or an adhesive applicator, etc. to heat melt or apply adhesive, and then both end faces are crimped to weld or adhere.

(2) Both ends of a rod-shaped or columnar synthetic resin material of a specified length are held by a pair of tools, and the end surfaces are brought into contact with a hot plate or an adhesive applicator, etc. to heat melt or apply adhesive. , where both end faces are crimped and welded or glued.

(3) A presser plate is removably attached via a spring to the tips of a pair of crimping levers configured in the shape of pliers, and is located between the tips of the crimping levers and is detachable from this position. The heating plate is movably provided, and after the end of a round belt or the like is clamped between the tips of a pair of crimping levers configured in the shape of pliers and a presser plate removably provided at the tips, the tips are rotating the heating plate in between;
After inserting the end plug of the round belt, etc. and heating it, use the crimp lever to once open the end of the plug to separate the phase heating plate from the end of the round belt, etc., and then tighten the crimp lever to heat the end plug of the round belt, etc. Using a welding tool to weld the
101713) etc. are known.

(Problem to be solved by the invention) However, while the above-mentioned method (1) of manually grasping both ends and welding or gluing them does not require any tools, There are problems such as the possibility that the hand gripping the end of the tube may get heated or come into contact with the adhesive, and in the case of the method using a tool such as a screwdriver as described in (2) above, it is necessary to use two sets of screwdrivers. Since welding, gluing, etc. were performed by holding and operating with both hands at the same time, it was difficult to accurately align the ends of the left and right rod-shaped or columnar synthetic resin materials, etc., which were gripped separately with two sets of tools. It was hot.

In addition, in the case of the welding tool described in the above-mentioned (3) Japanese Utility Model Application No. 58-101713, a presser plate that is detachably attached to the tips of a pair of crimping levers via a spring is attached and detached. By clamping the ends of a round vinyl belt, etc. to the tip of the same crimping lever, by rotating a heating plate between the end faces of both ends, the end faces of both ends of the round belt, etc. After heating and melting, the crimping lever is opened to separate the heating plate, and then the crimping lever is tightened to weld the end surface of the vinyl belt.The object, such as a vinyl belt, is connected to the tip of the crimping lever and the holding plate. By engaging with the U-shaped engagement groove provided in the part, the centering of the vinyl belt, etc. held in the same part is achieved indirectly. Not only does the rotatable heating plate tend to get in the way, but this one also has
Since there is no means to adjust the pressure bonding force at both ends of a vinyl belt, etc. whose end surfaces are melted by a hot plate, the only option is to adjust the pressure bonding force at the edges of heated round belts, etc. by human touch, and as far as this point is concerned, There were essentially the same issues as (1) and (2) above.

This invention was made by focusing on the problems of the conventional example, and it is possible to use an object, such as a round belt, which is held by a pusher which is removably attached to the receiver of a pair of crimping levers via a spring. A gripping and crimping tool that can solve the above-mentioned problems by providing a member between the opposing jaws of the crimping tool to regulate the proximity distance between the opposing frames when heating and crimping the ends. This is what we are trying to provide.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, this invention has a pair of gripping rods 1, 1, 21 whose central portions are rotatably connected by pivots 4, 24. , 21 end portions of the receiving jaws 2, 2, 22, 22, push jaws 11, 11, 21,
21 is provided so as to be tightenable and loosenable, and the round belt V
In a gripping and crimping tool for gripping and crimping an object such as
4. Elastic members 7, 7, 27, 27 for limiting the pressing force of the object are provided on the facing surface near the attachment part, and the both receiving jaws 2,
Spacing springs 5 and 25 are provided to maintain the distance between the object gripping portions 2, 22, and 22 to a predetermined width.

(Function) Since this invention has the above-mentioned configuration,
The spacing between the object gripping parts is maintained by spacing springs 5 and 25.
Jaws 2, 2, 22, 22 held at a predetermined width by
Loosen the upper pressing jaws 11, 11, 31, 31, and remove the receiving jaws 2, 2, 22, 22 and pressing jaws 11, 11, 31, 3.
1, insert a target object V such as a synthetic resin belt cut into a predetermined length, and after alignment by bringing both end surfaces into contact with each other, tighten the pressing jaws 11, 11, 31, 31. fixed, then said both jaws 2, 2, 2
2 and 22 are once opened against the spacing springs 5 and 25, and the end surfaces of both ends VA and VB of the object V are moved to the hot plate 11 or the adhesive applicator area, and both ends of the object V are opened. After the surface is brought into contact with the hot plate 11 or an adhesive applicator, etc. to heat and melt or apply the adhesive, both gripping rods 1, 1, 21, 21 are opened again and the hot plate 11 is again applied with adhesive. Then, the gripping rods 1, 1, 21, 21 are grasped and crimped until the elastic members 7, 7, 27, 27 for limiting the pressing force on the object are crushed, and the object is removed. Both end surfaces of the V are pressed and welded or glued, and then the pressing jaws 11,1
1, 31, 31 and both gripping rods 1, 1,
21, 21 is released, and the two receiving jaws 2, 2,
Return the interval between 22 and 22 to the normal width, pull this gripping and crimping tool away from the welded or bonded part of the object,
Prepare for welding or gluing the next object.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

(First Embodiment) FIGS. 1 and 2 are a plan view and a side view of a first embodiment of this invention. In both figures, 1, 1 is the gripping rod, 2, 2 is the gripping rod 1, the receiving jaw at the end of 1, 3,
Reference numeral 3 denotes a gripping portion of the base of the gripping rod 1, 1; 4, a pivot rotatably attached to the central portion of both gripping rods 1; 5; , 2 are spacing retaining springs, 6, 6 are protrusions for restricting proximity of the receiving jaws 2, 2, which are provided at the bases of the receiving jaws 2, 2 (on the pivot 4 side) so as to face each other; A buffer rubber is provided as an elastic member for limiting the pressing force and is removably attached to the protrusions 6, 6. The buffer rubber 7, 7 is normally lightly abutted by the spacing spring 5, but when both the gripping rods 1, 1, the opposing surfaces of the cushioning rubbers 7, 7 are deformed by a predetermined amount so as to be crushed, and the receiving jaws 2, 2 are brought closer to each other.
The nearest distance between the object gripping parts of both receiving jaws 2, 2, 22, 22 is determined by the buffer rubber 7, 7, 27, 27.
Regulations are made to accommodate thickness, elasticity, etc.

Reference numerals 8 and 8 denote bolts provided in the vertical direction of the receiving jaws 2, 2, and pushing jaws 11, 11 are attached to the bolts 8, 8 via compression springs 9, 9, and are moved toward and away from the receiving jaws 2. The push jaws 11, 11 are provided with a nut 1.
0 and 10, it is tightened to the receiving jaws 2 and 2 side.

Note that the receiving jaws 2, 2 and the pushing jaws 11, 11 are both formed to grip the object V in the opening direction of the gripping rods 1, 1, and each of the jaws 2, 2, 11, 11
The inner surface is formed as a rough surface with a large coefficient of friction.

(Operation of the first embodiment) Next, the operation of the first embodiment will be explained with reference to an example in which both ends of an object such as a synthetic resin belt V are gripped, heated, melted, and crimped.

In this first embodiment, the spacing retaining spring 5 causes the buffer rubbers 7, 7 on the proximity limiting protrusions 6, 6 of both receiving jaws 2, 2 to approach each other such that they are always in light contact with each other. 2, 2, in particular the distance between the object holders is kept constant. In this state, Natsuto 10,
10 is loosened, the pressing jaws 11, 11 are separated from the receiving jaws 2, 2 by the compression spring 9, and both ends of the synthetic resin belt V are cut to a predetermined length between the jaws 2, 2, 11, 11.
After inserting VA and VB so that the centers of their end faces match and abut, nuts 10 and 10 are tightened and held and fixed by pusher jaws 11 and receiver jaws 2 and 2.

After that, the grasping parts 3, 3 are once opened against the spacing spring 5, and both ends of the synthetic resin belt V are
After disposing VA and VB on both sides of the heated hot plate H with an opening between the abutting end surfaces, the opening force of the grasping parts 3 and 3 is slightly reduced according to the thickness of the hot plate H, and the above-mentioned composite Both end surfaces of the resin belt V are brought into light contact with the same heating plate H to be heated and melted.

Next, the two jaws 2 are moved against the spacing spring 5.
2, 11, 11 are opened again and the end face of the object V is separated from the hot plate H, both grasping parts 3, 3 are strongly grasped against their cushioning rubbers 7, 7 to the maximum deformation limit. The melted end faces of both ends VA and VB of the synthetic resin belt V are pressurized with a corresponding predetermined pressure to use the same end faces, and the pressurized state is maintained for a while to complete welding.

After that, when the nuts 10, 10 are loosened and the gripping force of the gripping parts 3, 3 is released, the receiving jaws 2, 2 and the pushing jaws 11, 11 are moved by the restoring force of the buffer rubbers 7, 7 and the spacing spring 5. Returning to the normal position (the state shown in FIG. 1), the holding and crimping tool is separated from both ends VA and VB of the object V after welding, in preparation for welding the ends VA and VB of another object V, etc.

According to this first embodiment, the target belt V
When grasping both ends VA and VB of the
While the spacing between the two jaws 2, 2, when the gripping parts 3, 3 are pressurized, 11, 11 is limited to the range of elastic deformation of the cushioning rubbers 7, 7, prior to heating the end faces of both ends VA, VB of the belt V etc., both jaws 2, 2, 11 , 11, the centering can be done accurately by abutting and aligning the end surfaces of both ends VA and VB of the same belt V, and from then on, without paying attention to the centering of both ends VA and VB after heating. ,
By simply grasping both gripping parts 3, 3 firmly, both ends can be removed.
VA and VB can be accurately welded without fear of misalignment.

Moreover, the receiving jaws 2, 2 and the pressing jaws 1 during welding
1, 11 will be limited by the thickness, elasticity, etc. of the cushioning rubbers 7, 7 provided on the proximity limiting protrusions 6, 6, so if the grasping parts 3,
Even if an excessive gripping force is applied to 3, the melted end surfaces of both ends VA and VB of the belt V are not excessively pressed, and deform in a fixed amount corresponding to the elasticity of the cushioning rubbers 7, 7, etc. Enables uniform welding.

Note that if the hot plate H in FIG. 1 is replaced with an adhesive applicator from which adhesive flows out from its surface, the gripping and crimping tool can be operated in substantially the same manner as described above to remove synthetic resin. Alignment and grasping of both ends VA and VB of a rod-shaped or columnar object such as a belt V, application of adhesive to the end face, and adhesion thereof can be performed with uniform pressing force.

(Second Embodiment) Next, a second embodiment of this invention will be described with reference to FIGS. 3 to 5. In addition, in order to clarify the correspondence with the first embodiment shown in FIGS. 1 and 2, 20 has been added to the numbers given in FIGS. 1 and 2 for the parts corresponding to the first embodiment. Use the sign of the number.

In Figures 3 to 5, 21 and 21 are gripping rods, 22 and 22 are jaws at the tips of the gripping rods 21 and 21, and 24 is rotatably pivoted at the center of both gripping rods 21 and 21. 25 is both gripping rods 21, 21
a spacing spring for keeping the spacing constant; 26;
26 is a protrusion for restricting the proximity of the receiving jaws 22, 22; 27;
Reference numeral 27 denotes a buffer leaf spring as a pressurization limiting elastic member disposed at the base of the receiving jaws 22, 22 so as to face each other. few.

28, 28 are bolts with levers, and 31, 31 are push jaws with long holes 32, 32. ) and move this button to 31,
31 and the receiving jaws 22, 22, the round belt V
Grasp an object such as

The object gripping portions of the receiving jaws 22, 22 and the pushing jaws 31, 31 are both formed in the opening/closing direction of the gripping rods 21, 21 (left and right direction in FIG. 3). The object gripping surfaces 22, 31, and 31 are formed as rough surfaces with a large coefficient of friction.

(Operation of the second embodiment) In this second embodiment, the bolts with levers 28, 2
Loosen 8 and displace the pressing jaws 31, 31 in the vertical direction (Fig. 3) relative to the receiving jaws 22, 22, change the distance between the two jaws, and insert the round belt V between the two jaws 22, 22, 31, 31. (See Fig. 1) After inserting both ends of the bolt and aligning both end faces,
8 to fix both ends VA and VB of the belt V, and the pressure limiting elastic spring 27 provided on the proximity limiting protrusion 26 of both receiving jaws 22, 22 is a plate spring. is substantially the same in structure and operation as the gripping and crimping tool of the first embodiment. Although not shown, the tightening mechanism using the lever bolt 28 may have a structure in which the pushing jaw 31 is tightened to the receiving jaw 22 by a cam pivotally supported on a support rod that projects from the receiving jaw 22 beyond the pushing jaw 31. .

Further, the buffer springs 27, 27 may be provided only on one of the proximity limiting protrusions 26, 26 of the receiving jaws 22, 22.

Although not shown in the drawings, if the gripping parts 3, 3 and 23, 23 of the first and second embodiments are formed into loop shapes that can be hung with fingers, the gripping rods 1, 1 and 21,
21. Therefore, the opening and closing operations of the catch jaws 2, 2 and 22, 22 become easier.

(Effects of the invention) Since this invention has the structure and functions as described above, the following effects can be obtained.

(1) The distance between the pair of catch jaws is always maintained constant by the spacing spring, and the elastic member for limiting the pressing force provided on the proximity limiting protrusion of both catch jaws allows the end faces of both ends of the object to be crimped. Since the force can be maintained constant, it is possible to uniformize the welding or bonding force, and even the welding or bonding condition of objects such as round belts, thereby creating a gripping and crimping tool that can easily perform homogeneous and highly reliable welding or bonding. Can be submitted.

(2) Both ends of the object such as the object to be welded or adhered,
After aligning the two end surfaces in advance by bringing them into contact at the planned position for welding, gluing, etc., the two ends are separated, opened and heated, or moved to an intermediate position for applying adhesive, etc. and heated. Alternatively, accurate welding, gluing, etc. operations can be performed by applying an adhesive, then moving to a position for welding, gluing, etc., and press-bonding.

(3) Prior to heating or applying adhesive, both end surfaces of the object are brought into contact with each other and then fixed using the pusher jaws and receiver jaws, and then both gripping parts are firmly gripped and crimped; There is no risk of excessive or insufficient crimp force between the end faces.

In addition, if the pressure limiting elastic member is made removable from the proximity limiting protrusion of the catch jaw, the effective thickness of the pressure limiting elastic member, its elasticity, etc. can be selected to allow objects made of different materials. Uniform welding or adhesion of the ends of the welding or adhesion can be performed using the same gripping force without adjusting the gripping force of the gripping rod during welding or adhesion.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a first embodiment of a gripping and crimping tool for welding, etc. according to this invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view of a second embodiment of this invention, and Fig. 4 is its top view, and FIG. 5 is its side view. 1, 21...grip rod, 2, 22...jaw catch, 3,
23... Grasping part, 4, 24... Axis, 5, 25...
... Spacing spring, 6, 26... Proximity limiting protrusion, 7... Buffer rubber (elastic member), 8... Bolt,
11, 31... Push jaw, 27... Shocking spring (elastic member), 28... Bolt with lever.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of gripping rods 1, 1, 21, 21 whose central portions are rotatably mounted on pivots 4, 24; , push jaws 11, 11, 21
In the gripping and crimping tool for gripping and crimping an object such as a round belt V by tightening and loosening the pivots 4,
24. Elastic members 7, 7, 27, 27 for limiting the pressing force on the object are provided on the opposing surface near the attachment part, and
Spacing springs 5, 25 are provided between the gripping rods 1, 1, 21, 21 to maintain the distance between the object gripping portions of the receiving jaws 2, 2, 22, 22 to a predetermined width. A gripping and crimping tool with special features. (2) The compression force limiting elastic members 7, 7, 27, 2
7 is composed of buffer rubber 7, 7 or plate springs 27, 27, and the buffer rubber 7, 7 or plate springs 27, 27 are connected to the receiving jaws 2, 2, 22, 22.
Proximities 6, 6 for restricting proximity provided on the nave surface of
26. The gripping and crimping tool according to claim 1, wherein the tool is detachably attached to 26, 26.