JPH0249376Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is used when a plurality of stacked metal plates, etc. are pressure-welded from both sides in the stacking direction. A pin with a head that can be inserted from one side into a hole formed through the member, and a clamping body that can be fixed to the tip side of the pin, the clamping body and the head of the pin. The present invention relates to a pressure welding tool for a plurality of members configured to press and join a plurality of members to each other.

[Conventional technology]

This type of pressure welding tool inserts a headed pin into the through-holes of multiple members to be joined, and then presses and joins the members to be joined using the headed pin and a clamping body attached to the shaft of the pin. For example, compared to a method in which the parts to be joined are tightened and fixed together by tying them together with a string-like joining tool, even if the parts to be joined have a large area, each part can be joined regardless of its area. This is advantageous in that the members can be firmly fixed with little relative displacement between them.

However, conventional pressure-welding joints have been merely a combination of a bolt and a nut, or a combination of a wedge-shaped member and a headed pin that serve as a clamp.

For this reason, when bolts and nuts are used as in the former case, it takes time to tighten them, and this and the latter case, where a wedge-shaped member is inserted into the opening of the headed pin, In either case, if vibrations were applied to the joints, the nuts and wedge-shaped members would loosen, and the loosening would progress further, causing the bolts and pins to come loose.

[The problem that the idea attempts to solve]

In addition, methods to prevent such loosening or coming out include providing a special anti-rotation structure for bolts and nuts, or forming a through hole in the wedge-shaped member at the part that protrudes from the opening of the pin, and It is conceivable to insert a retaining member such as a cotter pin into the connector, but this method increases the number of parts, complicates the operation, and requires two steps for pressure welding of multiple components. There is a drawback that the operational simplicity of the wedge-shaped member is impaired.

The present invention was developed in view of the above-mentioned problems, and its purpose is to
In order to securely fix the parts without being affected by the area of the parts to be joined, it is possible to simply press and join multiple parts by simply inserting a wedge-shaped member into the opening of the pin. The object of the present invention is to reliably prevent the wedge-shaped member from loosening or coming off.

[Means to solve the problem]

The extraction means of the present invention taken to achieve the above object includes a headed pin that can be inserted from one direction into holes formed through a plurality of members to be joined;
The pressure welding joint is equipped with a clamping body that can be fixed to the protruding portion on the distal end side of the shaft portion of the pin inserted into the hole, and is provided with the configurations described in [A] to [D] below. .

[B] The clamping member includes a pressing member that fits over the shaft of the pin and clamps the member to be welded between it and the head of the pin, and an opening formed through the tip of the shaft. It consists of a wedge-shaped member that can be freely inserted into the section.

[B] The wedge-shaped member includes a wavy locking portion that continues in the insertion direction to prevent it from coming off, and a wedge-shaped protrusion that presses the holding member toward the head of the pin as it is inserted into the opening. have.

[C] The wedge-shaped protrusion has a width in the direction along the pin axis when inserted into the opening.
The width is set wider than the width of the locking portion in the same direction, and the locking portion is configured to protrude in the wave height direction beyond the peaks of the waveform of the locking portion.

[d] The opening formed on the tip side of the shaft portion of the pin is provided with a retaining protrusion that engages with the locking portion of the wedge-shaped member and restricts movement of the wedge-shaped member in the withdrawal direction.

The effects and effects of implementing the above technology are as follows.

[Function] Since the parts to be joined are fixed by the clamping action using the pin and the clamping pressure body, it is possible to fix the parts to be joined without regard to the shape or size of the parts to be joined, and there is little mutual positional deviation. The members to be joined can be firmly joined.

Since the clamping member is composed of a combination of a pressing member and a wedge-shaped member, the overall structure for obtaining the required pressing area can be made relatively light and compact. In other words, if you try to obtain the required pressing area with only a wedge-shaped member, you will need to use a large wedge-shaped member, and the opening of the pin shaft will also be large, that is, the shaft will also have a large diameter, increasing the overall size. If the required pressing area is obtained using the presser member, the wedge-shaped member can be made small, and therefore the shaft portion of the pin can also be made small in diameter.

When providing the wedge-shaped member with a locking portion that performs a slip-off prevention function, the wedge-shaped member is set so that it protrudes in the wave height direction beyond the peaks of the waveform of the locking portion in relation to the wedge-shaped protrusions necessary to exert the wedge effect. A projecting piece is provided to prevent external force from acting on the corrugated portion of the locking portion in the clamping direction, thereby preventing the corrugation from being crushed and deformed and reducing the retaining function. .

[Effect of the invention] Due to the above-mentioned effects, a plurality of members to be joined having various sizes and shapes can be easily and firmly fixed without being affected by their shapes and areas.

Due to the above-mentioned effects, it is easy to obtain a pressure welding tool that is lightweight and small in comparison to the required pressing area.

Because of the above-mentioned action, it is easy to ensure that the retaining action is exerted over a long period of time.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

The pin 1 includes a shaft portion 1a for insertion into a hole 4 formed through the two plates 3A and 3B, and a head portion 1b for press-welding the plates 3A and 3B as members to be joined from one direction. An insertion hole 5 having a rectangular cross section, which is an example of an opening, is bored in the shaft portion 1a in a direction along the surfaces of the plates 3A and 3B. The upper inner wall surface 5a of the insertion hole 5 is inclined so that the outlet becomes narrower as it goes toward the exit direction, and the lower inner wall surface 5b opposite to the upper inner wall surface 5a is provided with saw-shaped grooves. Retaining protrusion 6
A hook 7 with elastic restoring force is integrally formed.

A presser member 8 that fits onto the shaft portion 1a of the pin 1 described above
and a wedge-shaped member 9 for pressing the presser member 8 toward the head 1b of the pin 1, the clamping member 2 is configured,
This clamping body 2 and the pin 1 constitute the pressure welding joint of the present invention.

The presser member 8 has a cylindrical shape and is fitted onto the shaft portion 1a of the pin 1 to securely press the two plates 3A and 3B together with the head portion 1b, and its thickness D is as follows:
At least the plate body 3B and the lower inner wall surface 5b of the insertion hole 5
A distance longer than the distance l ₁ to the upper inner wall surface 5a and shorter than the distance l ₂ to the upper inner wall surface 5a is used.

As shown in FIG. 3, the wedge-shaped member 9 is integrally formed with a long substrate 9a perpendicularly to both sides thereof, that is, in a U-shape when viewed in cross section, and as it approaches the tip. A pair of wedge-shaped protrusions 10a, 1 formed in a tapered shape so that the height decreases
0b. In the recessed portion of the wedge-shaped member 9, that is, on the substrate 9a, a corrugated locking portion 1 that can be elastically engaged with the retaining protrusion 6 and continuous in the insertion direction is provided.
1 is formed. Further, the wedge-shaped protrusion 10
a and 10b are set so that the width in the direction along the pin 1 axis when inserted into the opening 5 is wider than the width in the same direction of the locking part 11,
The locking portion 11 is configured to protrude beyond the crests of the waveform in the wave height direction. Furthermore, the rear end of the wedge-shaped member 9 and the presser member 8 are connected by a thin and bendable plate-shaped member 13, which helps to prevent loss and simplify handling.

With the above structure, the shaft portion 1a of the pin 1 is inserted into the hole 4 of the plates 3A and 3B, the presser member 8 is fitted onto the shaft portion 1a protruding from the opposite side, and the wedge-shaped member 9 is inserted. When the wedge-shaped protrusions 10a and 10b are inserted into the insertion hole 5 with their inclined surfaces facing the presser member 8, the wedge-shaped protrusions 10 are inserted from a certain insertion position.
The inclined surfaces of a and 10b contact the presser member 8 and apply a pressing force to the presser member 8, thereby making it possible to reliably press the two plate bodies 3A and 3B together. Maintaining this fastened state, that is, holding the position of the wedge-shaped member 9, is made possible by the engagement between the retaining protrusion 6 and the locking groove 12 of the locking portion 11. Of course, these act to restrict the pulling force only when the wedge-shaped member 9 is pulled out, as shown in FIG. As the locking portion 11 is inserted into the locking groove 12, the locking portion 11 is elastically deformed toward the head 1b of the pin 1 using its base as a fulcrum so that the engaging position of the locking portion 11 with respect to the locking groove 12 is automatically changed.

Note that by pulling the tip of the wedge-shaped member 9, the wedge-shaped member 9 is inserted deeper.

The material of the wedge-shaped member 9 may be metal,
It may also be a synthetic resin.

The cross section of the insertion hole 5 does not have to be particularly square, and may be configured in various shapes such as a hexagonal shape, or may be configured to open laterally. Further, the shaft portion 1a of the pin 1 may also be shaped like a hexagonal prism or a square prism.

Furthermore, as shown in FIG. 4, the shaft portion 1a of the pin 1
An annular protrusion 1c may be formed at the tip of the holding member 8 to allow insertion and removal of the holding member 8 only when a slight force is applied to the holding member 8 in the direction of the pin axis. In the case of this embodiment, by fitting the presser member 8 onto the shaft portion 1a of the pin 1 when not in use, the pin 1, the presser member 8, and the wedge-shaped member 9 can be conveniently integrated into one unit. can be handled.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the pressure welding joint according to the present invention, FIG. 1 is a vertical side view showing a joined state, FIG. 2 is a vertical front view showing a joined state, and FIG. 3 is an overall view. FIG. FIG. 4 is a sectional view showing another embodiment. 1... Pin, 1b... Head, 2... Clamping body, 3
A, 3B... Member to be joined, 4... Hole, 5... Opening, 6... Protrusion, 8... Holding member, 9... Wedge-shaped member, 10a, 10b... Wedge-shaped protrusion, 11... Connection Stop portion, 12...Latching groove.

Claims (1)

[Claims for Utility Model Registration] A pin 1 with a head that can be inserted from one direction into a hole 4 formed through a plurality of members to be joined 3A, 3B, and a pin 1 with a head inserted into the hole 4. Shaft portion 1a
A press-welding joint tool comprising a clamping pressure body 2 that can be fixed to a protruding portion on the distal end side thereof, and having the configurations described in [A] to [D] below. [B] The clamping body 2 is attached to the shaft portion 1a of the pin 1.
a presser member 8 which is fitted onto the head part 1b of the pin 1 and clamps the members 3A and 3B to be joined; and an opening 5 formed through the tip end side of the shaft part 1a.
It consists of a wedge-shaped member 9 that can be freely inserted into. [B] The wedge-shaped member 9 has a wavy locking portion 11 that continues in the insertion direction to prevent it from coming off, and a holding member 8 that moves the presser member 8 toward the head 1b of the pin 1 as it is inserted into the opening 5. Wedge-shaped projection piece 10a, 1 to press
0a. [C] The width of the wedge-shaped protrusion 10a10b in the direction along the axial direction of the pin when inserted into the opening 5 is set to be wider than the width of the locking portion 11 in the same direction. , is configured to protrude in the wave height direction beyond the crests of the waveform of the locking portion 11. [D] The opening 5 formed on the tip side of the shaft portion 1a of the pin 1 has a retainer that engages with the locking portion 11 of the wedge-shaped member 9 to restrict movement of the wedge-shaped member 9 in the withdrawal direction. A protrusion 6 is provided.