JPH1082171A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the connection and pulling out works of a building frame which builds a temporary frame scaffold by simple operation and provide the connection which excels in resistance against tensile strength. SOLUTION: A pipe joint 1 is constituted in such a manner that an operation member 3 which forms an operation piece 13 and a lock piece 14 continuously and integrally is stored in a joint pipe 2. Then, when elasticity in the direction in which the operation piece 13 and the lock piece 14 protrude to the outside from openings 9, 10 at all times is given to the operation member 3 by a spring 4, an engaging hole 19 of a longitudinal pipe 7 inserted into the joint pipe 2 is engaged with the lock piece 14 to provide a connection condition, and the operation piece 13 is pushed in to hold an immersion condition of the lock piece 14 due to the engagement of the longitudinal pipe 7 with an inner peripheral face, the longitudinal pipe 7 can be pulled out for the joint pipe 2. When the longitudinal pipe 7 is pulled out, the operation member 3 is restored to a position where the connection is possible automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting pipes, and more particularly to a pipe joint for vertically connecting a pipe-made building frame constituting a temporary framed scaffold for construction.

[0002]

2. Description of the Related Art A construction frame used for constructing a temporary framework scaffold is formed in a gate type or a torii type using a steel pipe, and the temporary scaffold is assembled by sequentially connecting the construction frames upward with a pipe joint. .

[0003] The basic structure of a pipe joint used for connection of a building frame is that a lower half of a joint pipe fitted into a vertical pipe of the building frame is fitted into a vertical pipe of a lower building frame and connected with a pin. At the same time, the vertical pipe of the upper building frame is externally inserted into the upper half of the joint pipe, and the two pipes are connected by a pin or the like.

[0004]

Conventionally, various structures have been proposed as the above-mentioned joints, but connection and disassembly work are troublesome and time-consuming, all of which are inconvenient and complicated. And have poor tensile strength. Also, to connect the upper and lower building frames to each other,
An arm lock is required separately.

[0005] Further, when connecting and extracting the upper building frame to and from the joint pipe, there is an inconvenience that the connection mechanism of the joint pipe must be operated each time.

Therefore, an object of the present invention is to automatically connect only by inserting a pipe, to perform a removal operation smoothly by holding an unlocking position of an operation member, and to perform a removal operation after removing a pipe. An object of the present invention is to provide a pipe joint that automatically returns to a connectable state, can easily perform connection and extraction operations, and has excellent tensile strength with a simple structure.

[0007]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a joint pipe having a large-diameter portion on an outer peripheral surface of a central portion, and an operating member housed in the joint pipe. A first opening including an upper portion of the large-diameter portion, a second opening above the large-diameter portion, and an inward projection below the large-diameter portion. Are provided side by side in the axial direction of the joint pipe, and the operating member includes an operating piece projecting through the first opening and projecting to the outer surface of the joint pipe with the lower end abutting on the inner protrusion; From the outer surface of the joint pipe, the upper end of which has an inclined surface with a downward slope. Biasing the elasticity of It is obtained by employing the structure you are.

[0008]

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

As shown in the figure, a pipe joint 1 is composed of a joint pipe 2, an operation member 3 housed in the pipe 2, and a spring 4 as an elastic body.

First, a joint pipe 2 is formed of a pipe having an outer diameter fitted into a vertical pipe of a building frame, and a sleeve 5 is externally fixed to an outer peripheral surface at a central portion to form a large diameter portion. The upper end of the vertical pipe 6 in the lower building frame externally inserted into the upper part abuts on the lower end of the sleeve 5, and the lower end of the vertical pipe 7 in the upper building frame that becomes the connected pipe externally inserted in the upper half part is the sleeve 5. It will contact the upper end.

The joint pipe 2 and the lower vertical pipe 6 are connected to each other by pins 8 which penetrate the fitting portion in the radial direction so as to prevent the joint pipe 2 from coming off.

The joint pipe 2 has a sleeve 5
A first opening 9 extending over the upper part of the sleeve 5 and the peripheral wall, a second opening 10 located in the middle of the peripheral wall, and an inner protrusion 2 at a position slightly lower than the sleeve 5.
1 are arranged on the same line in the axial direction of the joint pipe 2.

The first opening 9 is recessed downward from the upper end of the sleeve 5, and the upper portion is formed to have a size located above the upper end of the sleeve 5 of the joint pipe 2. Therefore, when the vertical pipe 7 is externally fitted to the upper half of the joint pipe 2, the upper half of the opening 9 is covered by the lower end of the vertical pipe 7.

On the outer surface of the peripheral wall of the joint pipe 2 where the second opening 10 is provided, a vertically long concave portion 11 is formed by recessing a part of the peripheral wall so as to protrude inward. A rectangular second opening 10 which is long in the vertical direction is provided on the bottom surface of 11.

Next, the operating member 3 is connected to the first opening 9 and the second opening 9.
An operation of penetrating the first opening 9 in a state where the lower end of the base rod portion 12 abuts on the inner protrusion 21 at a halfway portion on one side edge of the base rod portion 12 which is longer than the vertical interval of the opening 10. It has a structure in which a piece 13 and a lock piece 14 also penetrating through the second opening 10 are provided integrally at the upper end.

The lower end of the base portion 12 is an edge perpendicular to the longitudinal direction, and the operation piece 13 projects at a right angle from the base portion 12, and its lower edge is inclined downward toward the base portion 12. When the upper end surface of the lock piece 14 is pushed by the lower end of the vertical pipe 7 inserted into the joint pipe 2, the vertical lock piece 14 can be inserted into the joint pipe 2. Thus, it is formed on the inclined surface 16 at the leading end.

The spring 4 is formed by bending an elastic metal plate, and is compressed between the back surface of the base rod portion 12 of the operating member 3 incorporated in the joint pipe 2 and the inner peripheral surface of the joint pipe 2. The operation piece 13 and the lock piece 14 bias the elasticity of the operation member 3 in a direction in which the operation piece 13 and the lock piece 14 protrude outside from the respective openings 9 and 10. The operating member 3 and the spring 4 are connected to the concave portion 1 provided on the base rod portion 12.
By the engagement of the bending base 18 of the spring 4 with the spring 7, it is possible to move up and down integrally.

The base rod portion 12 of the operating member 3 is pressed against the inside of the joint pipe 2 by pressing with the spring 4, and the lower end thereof is in contact with an inner projection 21 formed on the joint pipe 2. The upper surface of the operation piece 13 penetrating through the first opening 9 is provided so as to coincide with the upper end of the sleeve 5, and the lock piece 14 penetrating through the second opening 10 is formed vertically along the inclined surface 16. The lower end of the pipe 7 is formed so that it can abut.

Note that the lock piece 14 is removably attached to the vertical pipe 7 which is fitted to the joint pipe 2 at a position corresponding to the lock piece 14 with its lower end abutting on the upper end of the sleeve 5. A hole 19 is provided.

The joint of the present invention is constructed as described above, and the lower half of the joint pipe 2 is inserted into the upper end of the vertical pipe 6 of the building frame, and is previously attached to the building frame by coupling with pins 8, and The upper half of the sleeve 5 and the joint pipe 2 project from the upper end of the pipe 6.

When the vertical pipe 7 is not connected to the joint pipe 2, as shown in FIG. 1, the operating member 3 is pressed by the spring 4 so that the operating piece 13 and the lock piece 14 are moved to the first and second openings 9, 9. 10 and protrudes outside the joint pipe 2.

At this time, the lower end of the base rod 12 is
1, the upper flat surface 20 of the lock piece 14 abuts on the upper edge of the second opening, and the inclined surface 16 is
The operation piece 13 protrudes from the inside of the first opening 9 to the outside of the joint pipe 2.

In this state, when the lower end of the vertical pipe 7 in the building frame is externally inserted into the upper half of the joint pipe 2, the lower end of the vertical pipe 7 abuts on the inclined surface of the lock piece 14 during the insertion, and Due to the insertion movement of the pipe 7, the inclined surface 16 acts to push the lock piece 14 into the joint pipe 2. At this time, the operation member 3 tilts with the lower end of the base rod portion 12 abutting on the inner protrusion 21 as a fulcrum.

When the lower end of the vertical pipe 7 abuts on the sleeve 5, the engaging hole 19 faces the lock piece 14 as shown in FIG. At the same time, the joint pipe 2 and the vertical pipe 7 are joined in a retaining shape so that the upper and lower building frames can be connected.

When a pulling force acts on the vertical pipe 7, the lower edge of the engaging hole 19 abuts on the lower surface of the lock piece 14, and the upper flat surface 20 of the lock piece 14 contacts the upper edge of the second opening 10. The contacting portion supports the pulling load.

Next, when extracting the upper vertical pipe 7, as shown in FIG. 2A, the operation piece 13 is connected to the joint pipe so that the inclined edge 15 slides on the lower edge of the first opening 9. 2. Push it obliquely downward into the inside.

The operating member 3 has the base rod portion 12 moved rearward, and the lower end thereof is disengaged from the inner projection 21 and descends. The operation piece 1 is engaged with the lower surface of the engagement hole 19 on the peripheral surface.
Even when the push of the button 3 is released, the state where the front surface of the lower end of the base rod portion 12 is in contact with the inner protrusion 21 is maintained.

As shown in FIG. 2 (B), when the vertical pipe 7 is pulled upward, the vertical pipe 7 rises while the operation member 3 remains, and the lower end edge of the vertical pipe 7 moves the tip of the lock piece 14 upward. When passing, the immersion state of the lock piece 14 is released,
The operating member 3, which is pressed outward by the spring 4, has a locking piece 14 protruding outward from the second opening 10, and an inclined edge 15 provided at the lower edge of the operating piece 13 has the first opening 9. By sliding the lower edge, the operating member 3 rises obliquely upward and outward, and automatically returns to the connectable state shown in FIG. 1, thereby connecting and disconnecting the vertical pipe 7. Sampling operation can be performed easily and efficiently.

[0029]

As described above, according to the present invention, since the pipe is connected via the operation member in which the operation piece and the lock piece are integrally formed, the connection having excellent tensile strength can be performed.
The use of an arm lock can be dispensed with, and the retracted state of the lock piece of the operating member can be maintained by abutting the tip of the lock piece against the inner peripheral surface of the connected pipe, making it easy to remove the connected pipe from the joint pipe. The operation can be performed safely, and the temporary framework scaffolding can be safely and efficiently dismantled.

Further, the operating member automatically returns to a connectable state after the connected pipe is pulled out.
The connection can be made simply by inserting the pipe to be connected, and the connection work can be performed extremely easily.

[Brief description of the drawings]

1A is a front view of a pipe joint, FIG. 1B is a longitudinal sectional view showing the same connection state, and FIG. 1C is a cross-sectional plan view taken along arrow CC in FIG.

FIG. 2A is a vertical cross-sectional view showing a state during a pipe joint extraction operation, and FIG. 2B is a vertical cross-sectional view showing a state in which a connected pipe is being extracted.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pipe joint 2 joint pipe 3 operating member 4 spring 5 sleeve 6, 7 vertical pipe 8 pin 9 first opening 10 second opening 12 base rod 13 operating piece 14 lock piece 15 inclined edge 16 inclined surface 19 engagement hole 21 Inside protrusion

Claims (1)

[Claims] 1. A first joint pipe comprising a joint pipe provided with a large-diameter portion on an outer peripheral surface of a central portion, an operation member and an elastic body housed in the joint pipe, the joint pipe including an upper portion of the large-diameter portion. An opening, a second opening above the large diameter portion, and an inner projection below the large diameter portion are provided side by side in the axial direction of the joint pipe. Operating piece projecting through the first opening and projecting to the outer surface of the joint pipe in a state in which
The second opening has a lock piece that can be freely protruded and retracted with respect to the outer surface of the joint pipe, and the upper end has an inclined surface descending at the tip. A pipe joint that constantly applies elasticity in the protruding direction.