JPH0636330Y2 - Pipe joint - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is a pipe joint,
More specifically, the present invention relates to a joint that vertically connects the building frames that form the temporary frame scaffolding.

[0002]

2. Description of the Related Art Using a building frame formed in a gate type or a torii type,
In order to build a frame temporary scaffolding, a joint is attached to the upper ends of the vertical pipes on both sides of each building frame, the standing lower building frames are sequentially connected by braces, and the upper building frame is joined to the lower building frame. It is assembled by vertically inserting the lower end of the vertical pipe into the vertical pipe and connecting them to each other, connecting the opposing construction frames with braces, and installing the scaffold plate.

Conventionally, as an example of a joint for connecting upper and lower building frames, as shown in FIG. 3, a large diameter portion 2 is provided on the outer periphery of an intermediate portion of a joint body 1 using a pipe, and a shaft of the large diameter portion 2 is provided. Horizontal holes 3 and 4 are formed on both sides of the center of the joint, and a locking hole 5 is provided on the outer periphery of the joint body 1 at a position directly above the horizontal hole 3.

The lock pin 6 is provided with an upward bending portion 8 at one end of a shaft portion 7 penetrating both lateral holes 3 and 4, and is fitted into the locking hole 5 at the upper end of the bending portion 8 in a freely detachable manner. A caulking portion 10 is provided on the other end side of a shaft portion 7 which is formed by coupling engagement pieces 9 and projects to the outside of the large diameter portion 2, and the caulking portion 10 and the outer surface of the large diameter portion 2 are contracted. The coil spring 11 urges the lock pin 6 to move elastically in the direction in which the engagement piece 9 is always fitted in the locking hole 5.

The vertical pipe A of the lower building frame and the joint body 1
Means that the upper end of the vertical pipe A and the lower surface step portion of the large diameter portion 2 are fitted to each other, and the lower part of the joint body 1 and the vertical pipe A are joined by the caulking pin 12.

Further, on the outer peripheral surface of the lower portion of the vertical pipe B in the upper building frame, a locking hole 13 is provided at a position communicating with the locking hole 5 when inserted into the upper half of the joint body 1, and both locking holes are provided. The vertical pipe B and the joint body 1 are coupled by the locking pieces 9 fitted over 5, 5 and the shaft portion 7 is pushed in so as to compress the coil spring 11 so that the locking pieces 9 are pushed through the locking holes 5, 13. It is designed to be disconnected by pulling it out.

[0007]

By the way, in the conventional joint as described above, since the coil spring 11 is assembled to the lock pin 6 outside the joint body 1,
There is a problem that the coil spring 11 is likely to be damaged by an impact from the outside, and the shaft portion 7 of the lock pin 6 is lengthened by the space for incorporating the coil spring 11 so that many protrusions to the joint body 1 interfere. is there.

Therefore, in order to solve the above problems, the present invention provides a pipe joint in which the coil spring is housed in the joint body to prevent damage and to shorten the joint pin. The task is to do.

[0009]

In order to solve the above problems, the present invention has a large diameter portion for forming a step portion for supporting a pipe on the outer peripheral surface of the intermediate portion. A joint body made of pipe provided with lateral holes at positions on both sides of the shaft center and a locking hole at a position immediately above the one lateral hole on the outer peripheral surface above the large diameter portion; A lock pin provided with an upward bending portion and an engaging piece that is bent continuously from the upper end of the bending portion at one end of the shaft portion penetrating over the lateral hole and is detachable from the locking hole; The lock pin is built in the joint body so as to be externally fitted to the shaft portion, and comprises a coil spring for urging the locking pin to move elastically in a direction in which the engaging piece is always fitted in the locking hole. A small-diameter step portion is provided around the coil spring, and the coil spring has an inner diameter that allows loose fitting to the shaft portion. One end has a small-diameter winding part with a diameter slightly smaller than the shaft part and fits in the small-diameter step part, and with the coil spring housed in the joint body, move from one lateral hole to the other lateral hole. By inserting the shaft portion so as to pass through the coil spring and forcibly pressing the shaft portion into the small diameter winding portion, the small diameter stepped portion of the shaft portion is engaged with the small diameter winding portion,
This is a structure in which a lock pin and a coil spring are connected.

[0010]

When the coil spring is assembled between the lateral holes in the joint body, and the shaft portion of the lock pin is press-fitted from one lateral hole to the other lateral hole, the shaft portion is wound with a small diameter of the coil spring. When the small-diameter concave portion faces the small-diameter concave portion, the small-diameter winding portion elastically fits into this small-diameter concave portion, the lock pin and the coil spring are coupled, and the lock pin has its engaging piece engaging hole. Elasticity is always urged in the direction of fitting.

Further, when the shaft portion of the lock pin is pushed in against the coil spring, the engaging piece comes out of the locking hole.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings. It should be noted that the same parts as those of the conventional example shown in FIG.

As shown in the figure, the lock pin 21 comprises a shaft portion 22 made of a metal shaft material, a bent portion 23, and a locking piece 24, and the shaft portion 22 extends from one outer surface of the large diameter portion 2 to the other outer surface thereof. With the penetrating length and the bent portion 23 in contact with the outer surface of the large-diameter portion 2, the outer peripheral surface of the portion of the shaft portion 22 located inside the joint body 1 is located at a position close to the other lateral hole 4. A small diameter step portion 25 is provided around the circumference.

The coil spring 26 has such a length that it is assembled in the inner radial direction of the joint body 1 in a compressed state, and an inner diameter in which the shaft portion 22 is loosely fitted, and one end thereof is slightly smaller than the outer diameter of the shaft portion 22. A small-diameter winding portion 27 having a small diameter and having an inner diameter that is elastically fitted to the small-diameter step portion 25 is provided.

The lock pin 21 is attached to the joint body 1.
To set the coil spring 26, first, as shown in FIG. 2, the coil spring 26 is inserted in a compressed state at a position between the lateral holes 3 and 4 in the joint body 1. Next, the shaft portion 22 of the lock pin 21 faces the one lateral hole 3, and the shaft portion 22 is inserted from one lateral hole so as to pass through the coil spring 26 and penetrate the other lateral hole 4.

The shaft portion 22 is the small diameter winding portion 2 of the coil spring 26.
When the bent portion 23 comes into contact with the outer surface of the large diameter portion 2, the small diameter stepped portion 25 is exactly desired to the small diameter winding portion 27, and the small diameter winding portion 27 has a reduced diameter elasticity. Is fitted into the small-diameter step portion 25, whereby the coil spring 26 and the lock pin 21 are coupled, the lock pin 21 is held in a detachable state with respect to the joint body 1, and the coil spring 26 keeps the engagement piece 24 always engaged. Elasticity in the direction of fitting into the stop hole 5 is urged.

FIG. 1 shows a state in which the vertical pipes A and B of the upper and lower building frames are connected to each other. The vertical pipe A and the joint body 1 are joined by a caulking pin 12, and the vertical pipe B and the joint body 1 have locking holes 5 between them. , 13 are engaged with each other by a locking piece 24.

When the vertical pipe B is inserted into or removed from the joint body 1, the shaft portion 22 of the lock pin 21 is inserted.
1 is pushed into the joint main body 1 against the coil spring 26, and the locking piece 24 is held at a position where it is pulled out from both locking holes 5 and 13 as shown by a chain line in FIG. Good.

[0019]

[Effects] As described above, according to the present invention, since it has the above-mentioned configuration, the following effects are obtained.

(I) Since the coil spring is housed in the joint body, the coil spring can be reliably protected,
The durability can be improved.

(II) Since the coil spring is housed in the joint body, the protrusion amount of the lock pin with respect to the outside of the joint body can be reduced, and the length of the lock pin can be shortened so that the material used is reduced and an obstructive portion. Can be reduced.

(III) The lock pin can be connected only by press-fitting the lock pin into the coil spring, so that the structure is simple and the assembling work is easy.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a pipe joint according to the present invention.

FIG. 2 is an explanatory view at the time of assembly showing the main part of the same.

FIG. 3 is a vertical sectional view showing a conventional pipe joint.

[Explanation of symbols]

 1 Joint Main Body 2 Large Diameter Part 3, 4 Lateral Hole 5 Locking Hole 21 Lock Pin 22 Shaft Part 23 Bending Part 24 Locking Piece 25 Small Diameter Step 26 Coil Spring 27 Small Diameter Winding Part

Claims (1)

[Scope of utility model registration request] 1. A large diameter portion for forming a step portion for supporting a pipe is provided on an outer peripheral surface of an intermediate portion, and lateral holes are formed at positions on both sides of an axis center of the large diameter portion. Also on the outer peripheral surface of the upper part, a joint body made of pipe provided with a locking hole at a position directly above one lateral hole, and at one end of a shaft portion penetrating over both lateral holes of the joint body, a bent portion upward, A lock pin that is continuously bent from the upper end of the bent portion and is provided with an engagement piece that can be freely inserted into and removed from the locking hole; The coupling piece is composed of a coil spring for urging movement elasticity in a direction to be constantly fitted in the locking hole.The lock pin has a small-diameter stepped portion around the outer periphery of the shaft portion, and the coil spring has a free play with respect to the shaft portion. It has an inside diameter that fits in, and a small diameter at one end that is a little smaller than the shaft portion and a small inside diameter that fits in a stepped portion. With the diameter winding part installed and the coil spring housed in the joint body, insert the shaft part so that it passes through the coil spring from one lateral hole to the other lateral hole, and insert it into the small diameter winding part. By forcibly press-fitting the shaft part, the small-diameter step part of the shaft part is engaged with the small-diameter winding part,
A pipe joint that combines a lock pin and a coil spring.