JPH0565722B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cross pipe fastening wedge, particularly a first pipe fitted into a concave portion at the end of a bipedal plate of a metal plate U-shaped bending fitting, and A cross-pipe fastening wedge that is pushed between the curved portion of the pipe and a second pipe that is fitted in a manner that crosses the pipe with a space therebetween, the bottom side of which is inserted into the second pipe. The present invention relates to a cross pipe fastening wedge having a body made of metal plates that are contacted.

Prior art and its problems This type of intersecting pipe fastening wedge is disclosed in Japanese Patent Application Laid-Open No. 62-270807, which is an invention previously proposed by the present inventor.
It is disclosed in the publication No. This prior art has a configuration in which a single wedge portion is formed on the opposite side of the bottom surface of a wedge body made of a metal plate. In this case, in order to achieve good tightening of the intersecting pipes by the wedge tightening action of the wedge, the wedge must be made so thick that the wedge does not become dented by the tightening. If the wedge portion is depressed, the connection of the cross pipes will deteriorate significantly. Thus, the previously proposed prior art had a problem in achieving cost reduction by thinning the wall.

An object of the present invention is to provide a cross pipe fastening wedge of the type described above, so that even if the wedge is made thin in order to effectively reduce costs, the cross pipes can be firmly fastened, and high strength can be obtained. It's in the middle of the day.

Means for Solving the Problems In order to achieve the above object, the cross pipe fastening wedge of the present invention has the following configuration.

That is, the present invention includes a first pipe fitted into a concave portion at the end of a biped plate of a metal plate U-shaped bending fitting, and a first pipe that is intersected with a curved portion of the fitting with a space separated from the pipe. A cross-pipe fastening wedge that is pushed in between the wedge and the second pipe fitted together, the wedge having a main body made of a metal plate whose bottom side is in contact with the second pipe, , a first wedge portion extending in the length direction of the main body in the central zone of the surface opposite to the bottom surface thereof, and a second wedge portion extending in the same direction on both left and right sides of the wedge portion and having a height slightly lower than that of the wedge portion. The present invention relates to a cross pipe fastening wedge characterized in that a wedge portion is formed.

Function Since the present invention has the above-mentioned configuration, when a wedge is forcibly pushed with a hammer or the like between the first pipe and the second pipe, which are cross pipes fitted to the required parts of the metal fittings, If the main body of the wedge made of metal plate is made to have an appropriate thickness in advance, the bottom side of the main body will be the second one.
in contact with the pipe, the wedge surface of the first wedge part of the main body central zone first comes into pressure contact with the first pipe,
As the wedge advances further, the wedge surface of the first wedge portion is slightly dented, and the wedge surfaces of the second wedge portions, which are slightly lower in height than the first wedge portion and on both left and right sides of the wedge portion, become similar to the first wedge portion. When the wedge is pressed against the pipe and the wedge is pushed further,
The wedge surfaces of the first and second wedge portions are both pressed against the first pipe.

That is, in the present invention, the first and second pipes are wedged between the first wedge portion and the second wedge portions on the left and right sides of the first wedge portion.

Effects of the Invention Since the present invention has the above-mentioned effects, even if the wedge is made thin in order to effectively reduce costs in the cross-pipe fastening wedge of the type described at the beginning, the cross-pipe can be firmly fastened.

Furthermore, in the present invention, the second wedge portion is formed by bending a required portion of the metal plate constituting the main body of the wedge, so that the main body is formed into a groove-shaped steel shape, and high strength can be achieved with a thin wall. It will be done.

Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, 1 is a metal plate U-shaped bending fitting;
has concave portions 13 and 1 at the ends of the bipod plates 11 and 12.
It has 4.

The first pipe A is the recessed part 13,1 of the metal fitting 1.
4 is fitted. The second pipe B is fitted into the bent part 15 of the metal fitting 1, and intersects with the first pipe A fitted in the recessed part with a space between them. Pipes A and B are made of metal.

A wedge 2 is inserted between the first pipe A and the second pipe B, and the wedge 2 has a main body 21 made of a metal plate. In the illustrated embodiment, the bottom plate 21a of the main body 21 has an arcuate groove shape in cross section. The bottom plate 21a may have a groove shape other than that, for example, a groove-shaped cross section.

a first wedge portion 2 extending in the length direction of the main body 21 in a central zone of the surface of the wedge 2 opposite to the bottom surface of the main body 21;
2, and second wedges 23 extending in the same direction on both left and right sides of the wedge portion 22 are formed on the main body 21. If necessary, the wedge surface of the first wedge portion 22 is provided with serrations 22a for preventing slippage. The height of the second wedge portion 23 is made slightly lower than that of the first wedge portion 22. Wedges 22 and 23,
Although the difference in height between 23 is not necessarily limited, it is generally possible to have a height difference of about 0.2 to 0.5 mm. The first wedge part 22 can be advantageously formed by punching a part of the main body 21 by press working, and the second wedge part 23 can be advantageously formed by bending a required part of the main body 21. can. The thickness of the wedge body 21 is
When the wedge 2 is forcibly pushed between the first pipe A and the second pipe B with a hammer or the like,
The thickness of the first wedge 22 is such that it is slightly depressed by pressure on the pipe A.

The cross-pipe fastening action of the wedge in the illustrated embodiment is as follows.

The first pipe A fitted in the recessed parts 13 and 14 of the metal fitting 1 and the first pipe A fitted in the curved part 15 of the metal fitting 1 intersect with each other with a space separated from the first pipe A. When the wedge 2 is forcibly pushed in between the main body 21 and the second pipe B in the length direction of the pipe B with the bottom of the main body 21 facing the pipe B, first the main body 21
With the bottom side of the pipe B in contact with the second pipe B,
The wedge surface, that is, the tapered upper surface, of the first wedge portion 22 in the central zone of the main body 21 comes into pressure contact with the first pipe A, and the wedge 2 is further pushed in, and the wedge surface of the first wedge portion 22 is pressed against the first pipe A. When the pipe A is compressed and slightly dented, the second wedge portions 2 on both left and right sides of the first wedge portion 22
The wedge surfaces of 3 and 23, that is, the tapered upper surfaces, come into pressure contact with the first pipe A, and as the wedge 2 pushes further forward, the first wedge portion 22 and the second wedge 23,
Both wedge surfaces of 23 come into pressure contact with the first pipe A, tightening the first and second pipes A and B.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention together with its usage state, FIG. 2 is a side view of the wedge shown in FIG. 1, and FIG. 3 is a longitudinal sectional view of the wedge. A...First pipe, B...Second pipe, 1
...Metal fittings, 2...Wedge, 11, 12...Bipod board, 1
3, 14... Concave portion, 15... Curved portion, 21...
Wedge main body, 22...first wedge part, 23...second wedge part.

Claims (1)

[Claims] 1. A first pipe fitted into a concave portion at the end of a biped plate of a U-shaped metal plate bending fitting, and a first pipe fitted into a curved portion of the fitting in a manner that intersects with the pipe with a space separated therefrom. A cross pipe fastening wedge that is pushed in between the wedge and the second pipe, the wedge has a main body made of a metal plate whose bottom side is in contact with the second pipe, and the wedge has a main body made of a metal plate whose bottom side is in contact with the second pipe. A first wedge portion extending in the length direction of the main body in the central zone of the opposite side, and second wedge portions extending in the same direction on both left and right sides of the wedge portion and having a height slightly lower than that of the wedge portion. A cross-pipe fastening wedge characterized by forming a cross-pipe fastening wedge.