JPH0724521Y2 - Pipe joint - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for vertically connecting pipe construction frames that constitute a temporary processing scaffold for construction.

[0002]

2. Description of the Related Art A building frame used to construct a temporary frame scaffold is formed into a gate type or a torii type using steel pipes, and the temporary scaffold is assembled by sequentially connecting the building frames upward with pipe joints. .

The basic structure of the pipe joint used to connect the building frames is that the lower half of the joint pipe that fits in the vertical pipe of the building frame fits in the vertical pipe of the lower building frame and is joined by pins. At the same time, the vertical pipe of the upper building frame is externally fitted and inserted into the upper half of the joint pipe, and the two are connected by a pin or the like.

[0004]

Conventionally, various structures have been proposed as the above-mentioned joints, but all of them are troublesome and time-consuming to connect and disassemble, and the structure is complicated. There is a problem that it is weak in tensile strength. Also, in order to connect the upper and lower building frames to each other,
Arm lock is required separately.

Therefore, in order to solve the above problems, the present invention makes it possible to easily perform the connecting and disassembling operations, obtain an excellent tensile strength with a simple structure, and eliminate the need to use an arm lock. The challenge is to provide a pipe joint that can

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a joint pipe having a locking hole in a central portion of a peripheral wall and through holes at upper and lower positions of the locking hole.
Locking pins that are housed in the joint pipe and integrally formed at both upper and lower ends of the shaft portion so as to bend in the same direction are housed in the joint pipe and lock pins that fit in the upper and lower through holes, respectively. A spring that presses the lock pin in the direction in which the locking claw always projects from the upper and lower through holes,
It consists of a lock lever that penetrates through the locking hole inward and outward and engages in the pushing direction with a position closer to the upper part at the shaft-shaped part of the lock pin, and the upper locking claw in the joint pipe in the locking hole and the lock lever. This is a configuration in which a pair of engaging portions that lock the lock lever at the pushing position of the lock lever that is immersed in is provided.

[0007]

[Operation] With the lock lever and the engagement hole disengaged,
The upper and lower locking claws of the lock pin each project to the outside of the joint pipe, and the locking claws can be inserted by inserting the pipes with the engaging holes at the corresponding positions into the lower half and upper half of the joint pipe. Engages with the engagement hole, and the upper and lower pipes are coupled to each other in a retaining manner via the lock pin.

In order to remove the upper pipe, the lock plate may be pushed in and locked in the locking hole, and the lock pin tilts so that the upper locking claws are recessed in the joint pipe, and the upper pipe is left as it is. It can be pulled out and the lower pipe and the joint pipe remain connected by the lower locking pawl.

Further, the joint pipe can be removed from the lower pipe by pushing the lower engaging claw with a shaft-like object and removing the joint pipe with the engagement hole disengaged.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the first embodiment shown in FIGS. 1 to 4, a pipe joint 1 includes a joint pipe 2, a lock pin 3 and a spring 4 incorporated in the pipe 2, and a central portion of the joint pipe 2. It is configured by a combination with a lock lever 5 penetrating in and out.

The joint pipe 2 is a pipe having an outer diameter that fits within a vertical pipe in a building frame, and a sleeve 6 is fitted and fixed on the outer peripheral surface of the central portion of the lower building frame. The upper end of the vertical pipe A contacts the lower end of the sleeve 6, and the lower end of the vertical pipe A ₁ in the upper building frame inserted in the upper half part contacts the upper end of the sleeve 6.

At the central portion of the peripheral wall of the joint pipe 2 in the up-down direction, the sleeve 6 and the locking hole 7 are provided.
Is further provided, and a through hole 8 is provided at a position close to and immediately above the locking hole 7, and a through hole 9 is provided at a lower end position of the joint pipe 2 immediately below the locking hole 7 to engage with both through holes 8 and 9. The stop holes 7 are aligned on the same line in the axial direction of the joint pipe 2.

The lock pin 3 is formed of a round shaft member or a square shaft member, and integrally formed with locking claws 11 and 12 that are bent at right angles in the same direction at both upper and lower ends of the shaft-shaped portion 10, The lower engaging claw 12 is adapted to be fitted in the lower through hole 9 in a state where the upper engaging claw 11 is fitted in the upper through hole 8.

A portion of the shaft-like portion 10 near the upper end portion and corresponding to the locking hole 7 is bent inward in a mountain shape, and a flat portion 13 is provided in this bent portion, and a position slightly below this mountain portion. An engaging recess 14 for the spring 4 is provided in the.

The spring 4 is a leaf spring which is long in the up and down direction, is bent in a mountain shape toward the central portion, and has a U-shaped bent portion 15 which fits into the engaging recess 14 at the top thereof. When the lock pin 3 is assembled, the upper and lower substantially intermediate positions of the lock pin 3 are pressed, and the locking claws 11 and 12 urge the elasticity in the direction of protruding from the locking holes 8 and 9 to the outside.

In the upper locking claw 14, the upper surface of the portion projecting from the through hole 8 to the outside of the joint pipe 2 is inclined downward, and the lower locking claw 12 is also similarly inclined in the lower surface upward. An engaging hole 16 for engaging the upper locking claw 11 is provided on the lower peripheral wall of the vertical pipe A ₁ in the upper building frame, and a lower locking claw ₁ is provided on the upper peripheral wall of the vertical pipe A _{1 in} the building frame.
An engagement hole 17 with which 2 is engaged is formed.

As shown in FIGS. 2 and 3, the lock lever 5 uses a substantially rectangular plate, and the cutout portion 18 provided on the inner end side is a lock pin while the locking hole 7 is penetrated inward and outward. The outer end side is externally fitted to the flat portion 13 and the width is reduced in two steps of the intermediate width portion 19 and the narrow width operation piece 20, and step portions 21 and 22 are formed in the respective fields.

Locking hole 7 through which the lock lever 5 penetrates
As shown in FIGS. 3 and 4, the wide width portion 23 to which the intermediate width portion 19 is fitted, and the narrow width portion 24 that is continuous with the lower portion of the wide width portion 23 and has the width to which the narrow width operation piece 20 is fitted. The corresponding portion of the joint pipe 2 with the locking hole 7 is a hole 25 having a diameter larger than that of the wide portion 23.

The intermediate width portion 19 of the lock lever 5 is wide portion 2
As shown in FIG. 1 (A) and FIG.
1 serves as a retainer to the outside, and is in a position where the push pin is released from the lock pin 3, and the lock pin 3 is in a state in which the locking claws 11 and 12 are projected to the outside of the joint pipe 2 by the pressing of the spring 4. Has become.

When the lock lever 5 is pushed in from the above state, the lock lever 5 is locked by the spring 4 of the lock pin 3.
1B, the lock pin 3 tilts with the fitting portion of the lower locking claw 12 and the through hole 17 as a fulcrum, as shown in FIG. The locking claw 11 is recessed inside from the through hole 8, and in this state, when the narrow width operation piece 20 is pushed down and fitted into the narrow width portion 24, the step portion 22 is formed.
Engages with the inner surface of the sleeve 6 to lock the pushed state of the lock pin 3.

To release the lock, the narrow operation piece 2
Push 0 with your fingertips to position it in the wide portion 23,
The pressing elasticity of the spring 4 causes the lock pin 3 to move to the upper locking claw 1.
1 returns to the posture in which it projects from the through hole 8 to the outside.

The first embodiment of the present invention is constructed as described above, and the lock lever 5 is pulled up and positioned in the wide portion 23 of the locking hole 7 as shown in FIG. The upper and lower locking claws 11 and 12 are released through the through holes 8 and 9
If the vertical pipes A and A ₁ are inserted into the joint pipe 2 in a state of protruding outward from the locking claws 11 and 12
Due to the sloped surface provided on the lock pin 3,
2 automatically immerses, and the engaging pawls 11 and 12 of the lock pin 3 elastically returned are engaged with the engaging holes 16 and 17 of the vertical pipes A and A ₁ that have been inserted quantitatively, as shown in FIG. As shown by the alternate long and short dash line, the upper and lower vertical pipes A and A ₁ are coupled to each other via lock pins 3 in a retaining manner.

Since the lock pin 3 is made of a shaft material having a large diameter and has locking pawls 11 and 12 integrally formed at both ends thereof, a connection state having a strong pull-out strength can be obtained.

In a normal building frame, the pipe joint 1 is attached to the upper end of the vertical pipe A in advance, and the lower end of the vertical pipe A ₁ in the upper building frame is inserted into the upper half of the joint pipe 2 to form a temporary frame scaffolding. Therefore, at the time of assembling and disassembling the temporary frame scaffold, the main work is to connect and disconnect the upper vertical pipe A ₁ to the upper half of the joint pipe 2.

To remove the upper vertical pipe A ₁ from the joint pipe 2, the lock lever 5 is pushed and the spring 4
If the upper part of the lock pin 3 is pushed in against the lock pin 3 as shown in FIG. 11 is through hole 8
When the narrow operation piece 20 is locked in the narrow portion 24 by pushing the lock lever 5 downward from the joint pipe 2, the locking claw 11 is kept in the retracted state, and the vertical pipe A ₁ can be removed. It will be possible.

In order to return the locking claw 11 from the retracted state to the projecting position, the lock lever 5 may be pushed up, and the narrow operation piece 20 is located in the wide portion 23 so that the spring 4 is pressed. The lock pin 3 is elastically brought into the state of FIG. 1 (A), and the upper locking claw 11 is fitted into the through hole 8.

When the pipe joint 2 is to be removed from the upper end of the vertical pipe A in the lower building frame, a shaft-like object is used to push in the lower locking claw 12 to release the engagement with the engagement hole 17, and to make the joint. The pipe 2 should be removed.

Next, a second embodiment shown in FIGS. 5 to 7 will be described. In the second embodiment, the same parts as those in the first embodiment described above will be denoted by the same reference numerals and will not be described.

In this second embodiment, the lock pin 3
While making the shaft-shaped portion 10 of the straight shape in the vertical direction,
The lock lever 5 is formed to be longer than the outer diameter of the sleeve 6, and a long hole 31 in the circumferential direction is provided at a position facing the locking hole 7 of the joint pipe 2 and the sleeve 6.
Is provided between the locking hole 7 and the long hole 31.

The lock lever 5 is fitted on the flat portion 13 of the lock pin 3 by a long notch 18, and the narrow operation portion 20 at the tip can be locked to the narrow portion 24 by pushing and pushing. ing.

The spring 4 is formed by bending a leaf spring into a substantially V-shape. One end of the spring 4 is brought into contact with the back surface of the lock pin 3, the upper end of which is locked in the middle of the lock lever 5, and the other end of which is a joint pipe. The upper end of the lock pin 3 is locked in the long hole 31 by contacting the inner surface of the lock pin 2, and the lock pin 3 is elastically urged in the direction in which the locking claws 11 and 12 always project from the through holes 8 and 9.

The second embodiment is constructed as described above, and the connection and disconnection of the vertical pipes A and A ₁ are the same as those of the first embodiment described above.
The operation and action are similar to those of the above embodiment.

[0034]

As described above, according to the present invention, since the pipes are connected through the lock pins integrally formed with the locking claws at the upper and lower ends, the connection with excellent tensile strength can be achieved.
The use of arm locks can be eliminated and the retracted state of the upper locking claw of the lock pin can be held by the lock lever and the locking hole, and the upper pipe can be removed from the joint pipe by a simple operation. Assembly and dismantling work can be done safely and efficiently.

Further, the lower locking claw of the lock pin can be pushed from the outside to pull out the lower pipe, and moreover, when the upper pipe is pulled out, the connection state with the lower pipe can be maintained, and the connection state is safe. It is possible to improve the sex.

[Brief description of drawings]

FIG. 1 (A) is a longitudinal sectional view showing a first embodiment of a pipe joint according to the present invention in a connected state, and FIG. 1 (B) is a longitudinal sectional view showing a pulled-out state of an upper pipe.

FIG. 2 is a cross-sectional plan view showing a lock lever portion of the above.

FIG. 3 is an exploded perspective view showing a main part of a pipe joint.

FIG. 4 is a front view showing a locking hole portion of a pipe joint.

5A is a vertical cross-sectional view showing a second embodiment of the pipe joint in a connected state, and FIG. 5B is a vertical cross-sectional view showing the upper pipe taken out in the same manner as above.

FIG. 6 is a transverse sectional view of the lock lever portion of the above.

FIG. 7 is a front view showing a portion of a locking hole in the above.

[Explanation of symbols]

 1 Pipe Joint 2 Joint Pipe 3 Lock Pin 4 Spring 5 Lock Lever 7 Locking Hole 8, 9 Through Hole 11, 12 Locking Claw

Claims (1)

[Scope of utility model registration request] 1. A joint pipe having a locking hole in a central portion of a peripheral wall and through holes at upper and lower positions of the locking hole, and a joint pipe housed in the joint pipe, the upper and lower end portions of a shaft-shaped portion extending in the same direction. Lock pins in which locking claws integrally molded so as to bend toward each fit in the upper and lower through holes, and a direction in which the locking claws are housed in the joint pipe and the locking claws always protrude from the upper and lower through holes. It consists of a spring for pressing and a lock lever that penetrates the locking hole inward and outward and engages in the pushing direction with a position closer to the upper part at the axial part of the lock pin, and locks the upper part to the locking hole and the lock lever. A pipe joint that has a pair of engaging parts that lock the lock lever at the push-in position of the lock lever with the claws retracted into the joint pipe.