JPH07286438A - Pipe joint - Google Patents

Abstract

PURPOSE:To perform the connecting and pulling work of a standard for constructing a temporary framed scaffold by a simple operation, and provide a connection excellent in tension resisting strength. CONSTITUTION:A lock pin 3 having an operation piece 13 and a lock piece 14 integrally continued to each other is housed in a joint pipe 2, and the elasticity in the direction for regularly protruding the operation piece 13 and the lock piece 14 from through-holes 9, 10 to the outside is energized by a spring 4, whereby a vertical pipe 7 inserted into the joint pipe 2 is laid in the connected state by the engagement of the engaging hole 17 of the vertical pipe 7 with the lock piece 14. When the operation piece 13 is pushed in, and the recessed state of the lock piece 14 is held by the engagement of a locking recessed part 15 with the vertical pipe 7, the vertical pipe 7 can be pulled out from the joint pipe 2. When the vertical pipe 7 is pulled out, the lock pin 3 is automatically returned to the connectable position.

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 pipe construction frames constituting 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 for connection and disassembly work, and have a complicated structure. 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.

Furthermore, when connecting or disconnecting the upper building frame to or from the joint pipe, there is the inconvenience that the connecting mechanism of the joint pipe must be operated each time.

Therefore, an object of the present invention is to connect a pipe automatically by inserting it, and after the pipe is pulled out, the pipe is automatically returned to a connectable state, so that the connecting and pulling operations are easy. Another object of the present invention is to provide a pipe joint that can be manufactured and has a simple structure and excellent tensile strength.

[0007]

In order to solve the above-mentioned problems, a first aspect of the present invention provides a joint pipe having a large-diameter portion on an outer peripheral surface of a central portion, from a large-diameter portion to a peripheral wall on one end side thereof. A first through hole extending over the large diameter portion and the peripheral wall and a second through hole located in the middle of the peripheral wall are provided side by side in the axial direction of the joint pipe, and inside the joint pipe, along the axial direction of the joint pipe. And a lock pin provided with a lock piece to be inserted into the second through hole at one end of the base rod part in the middle of the long and long base rod part, and to this lock pin. The operation piece and the lock piece incorporate a spring for urging elasticity in a direction of penetrating the respective through-holes and projecting to the outside of the joint pipe, and the lock piece of the lock pin has a connection pipe inserted into the joint pipe. Pushed in at the end A state where an inclined surface for immersing the lock piece in the joint pipe is formed, and the operation piece is pushed into the joint pipe to immerse the lock piece in the joint pipe, The structure adopts a configuration in which a locking recess is provided for holding the end of the connected pipe that is fitted onto the pipe by engaging with the end of the connected pipe.

According to the second aspect of the invention, the joint pipe having a large diameter portion on the outer peripheral surface of the central portion is provided on the peripheral wall on one end side with respect to the large diameter portion.
A first through hole extending over the large diameter portion and the peripheral wall and a second through hole located in the middle of the peripheral wall are provided side by side in the axial direction of the joint pipe, and inside the joint pipe, in the axial direction of the joint pipe. Along the middle of the long base,
The operation piece to be inserted into the through hole of the
A lock pin provided with a lock piece to be inserted into the through hole of
The operation piece and the lock piece were assembled with a spring that urges elasticity in a direction in which the operation piece and the lock piece penetrate the respective through holes to project to the outside of the joint pipe, and the lock piece of the lock pin was inserted into the joint pipe. An inclined surface is formed by pushing at the end of the connected pipe to push the lock piece into the joint pipe, and the first through hole and the operating piece are pushed and pushed by the operating piece to push the lock piece. A configuration is adopted in which the operation piece is vertically movable in the first through hole so that the tip end is brought into contact with the inner surface of the connected pipe and the unlocked state is maintained.

[0009]

[Action]

1st invention The lock pin pressed by the spring has the lock piece and the operation piece protruding to the outside of the joint pipe, and when the connected pipe is inserted into this joint pipe from one end side,
The lock piece pushed by the connected pipe is pushed into the joint pipe by the inclined surface and goes into the joint pipe, and when the connected pipe is inserted to the position where it abuts the large diameter portion, the engagement provided on this connected pipe The hole faces the lock piece, and the lock piece returns to the projecting state by the pressing of the spring and engages with the engaging hole, so that the joint pipe and the connected pipe are connected.

When the operation piece is pushed in against the spring to release the connection, the lock pin tilts with the lower end of the base rod as a fulcrum, and the lock piece comes out of the engagement hole and enters the joint pipe. By retracting, the locking recess of the operation piece engages with the end of the connected pipe, and the retracted state of the lock piece is maintained, so that the connected pipe can be removed.

When the pipe to be connected is pulled out, the end portion of the pipe is pulled out from the locking recess of the operation piece, and at this time, the engagement hole of the pipe to be connected is separated from the lock piece, so that the lock piece is locked. Indicates that the tip is in contact with the inner peripheral surface of the connected pipe, which does not hinder the removal of the connected pipe, and when the connected pipe is removed, the lock piece and the operating piece can be connected by pressing the spring. Return to.

Second invention: With the same operation as in the first invention, the connection state of the joint pipe and the connected pipe can be obtained, and in order to release the connection, the operation piece is pushed against the spring and locked. The pin tilts with the lower part of the main part as a fulcrum, and when the lock piece comes out of the engagement hole and retracts into the joint pipe, the operation piece is pushed down. As a result, the lock pin as a whole goes down, and when the push pin is released at this push-down position, the tip of the lock piece of the lock pin pushed by the spring hits the position below the engaging hole on the inner peripheral surface of the pipe to be connected. Stops in contact with it and does not hinder the extraction of the connected pipe. When the connected pipe is removed, the lock piece
It projects to the outside from the through hole and returns to the connectable state.

[0013]

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, the pipe joint 1 includes a joint pipe 2, a lock pin 3 and a spring 4 incorporated in the pipe 2.
It is composed by.

First, as the joint pipe 2, a pipe having an outer diameter that fits within a vertical pipe in a building frame is used, and a sleeve 5 is externally fitted and fixed to the outer peripheral surface of the central portion to form a large diameter portion. The upper end of the vertical pipe 6 in the lower building frame externally fitted to the upper portion abuts the lower end of the sleeve 5, and the lower end of the vertical pipe 7 in the upper building frame externally fitted to the connected building pipe is the sleeve 5 It will come into contact with the upper end.

The joint pipe 2 and the lower vertical pipe 6 are connected in a retaining manner by a pin 8 which penetrates the fitting portion in the radial direction.

On the peripheral wall between the sleeve 5 and the upper end portion of the joint pipe 2, the sleeve 5 and the first spanning the peripheral wall are provided.
Through hole 9 and a second through hole 10 located in the middle of the peripheral wall.
And are provided so as to be aligned on the same line in the axial direction of the joint pipe 2.

In the first through hole 9, the peripheral wall of the sleeve 5 and the joint pipe 2 is cut out in a rectangular shape, the lower half portion is located at the overlapping portion of the sleeve 5 and the peripheral wall, and the upper half portion is the sleeve 5.
Is located above the upper end of the. Therefore, when the vertical pipe 7 is fitted onto the upper half of the joint pipe 2, the upper half of the through hole 9 is covered by the lower end of the vertical pipe 7.

As shown in FIGS. 3 and 4, on the outer surface of the portion of the peripheral wall of the joint pipe 2 where the second through hole 10 is provided, as shown in FIG. 3 and FIG. A long recess 11 is formed, and a rectangular second through hole 10 is provided on the bottom surface of the recess 11.

Next, the lock pin 3 is used for the lock pin 3 as shown in FIG. 1 and FIG.
As shown in FIG. 5, an operation piece that penetrates the first through hole 9 at an intermediate portion of one side edge of the base rod 12 that is vertically longer than the vertical distance between the first through hole 9 and the second through hole 10. 13,
Similarly, the lock piece 1 that penetrates the second through hole 10 at the upper end portion
4 and 4 are integrally provided.

The base rod portion 12 has an arcuate lower end,
The operation piece 13 is provided at its upper edge with a locking recess 15 for engaging the lower end of the vertical pipe 7 externally fitted to the joint pipe 2, and further, the upper end surface of the lock piece 14 has a joint pipe. The inclined piece 16 is formed so that the lock piece 14 can be retracted into the joint pipe 2 when pushed by the lower end of the vertical pipe 7 fitted onto the outer pipe 2.

The spring 4 is formed by bending an elastic metal plate into a substantially U shape, and is formed between the rear surface of the base rod 12 of the lock pin 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 are arranged in a compressed state in between to urge the elastic force in the direction in which the operation piece 13 and the lock piece 14 project outward from the respective through holes 9, 10.

In the state where the base rod portion 12 of the lock pin 3 is pressed against the inner surface of the joint pipe 2 by being pressed by the spring 4, the locking recess 15 of the operation piece 13 penetrating the first through hole 9 is The lock piece 14 provided so as to be located outside the outer surface of the vertical pipe 7 and penetrating the second through hole 10 is formed so that the vertical pipe 7 can abut in the middle of the inclined surface 16. There is.

In the vertical pipe 7 which is fitted onto the joint pipe 2, the lock piece 14 can be engaged and disengaged at a position corresponding to the lock piece 14 with the lower end abutting the upper end of the sleeve 5. A fitting hole 17 is provided.

The joint according to the first embodiment of the present invention is constructed as described above, and the lower half portion of the joint pipe 2 is inserted into the upper end of the vertical pipe 6 of the building frame, and is connected by the pin 8 to the building frame. The sleeve 5 and the upper half of the joint pipe 2 are protruded from the upper end of the vertical pipe 6 in advance.

When the vertical pipe 7 is not connected to the joint pipe 2, the lock pin 3 is pushed toward the first and second through holes 9 and 10 by the pushing of the spring 4 as shown in FIG. The piece 13 and the lock piece 14 penetrate through the through holes 9 and 10 and project to the outside of the joint pipe 2.

At this time, the upper flat surface 18 of the lock piece 14
Touches the upper end edge of the second through hole 10, the inclined surface 16 projects to the outer surface of the joint pipe 2, and the operation piece 13 moves from the lower position in the first through hole 9 to the outside of the joint pipe 2. Overhangs.

In this state, the upper surface of the operation piece 13 is equal to or slightly lower than the upper end of the sleeve 5. In this state, when the lower end of the vertical pipe 7 in the building frame is externally fitted to the upper half of the joint pipe 2,
During insertion, the lower end of the vertical pipe 7 is the inclined surface 1 of the lock piece 14.
When the vertical pipe 7 is inserted into the joint pipe 2, the lock piece 14 is pushed into the joint pipe 2.

When the lower end of the vertical pipe 7 abuts on the sleeve 5, the engagement hole 17 faces the lock piece 14 and the lock piece 14 returned to the projecting position engages with the engagement hole as shown by the alternate long and short dash line in FIG. The joint pipe 2 and the vertical pipe 7 are engaged with each other 17 and are joined in a retaining manner 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 17 abuts the lower surface of the lock piece 14, and the upper flat surface 18 abuts the upper edge of the second through hole 10. The part will support the withdrawal load.

Next, when the upper vertical pipe 7 is to be removed, as shown in FIG. 2 (A), the operating piece 13 is pushed toward the inside of the joint pipe 2 and the locking recess 15 is inserted into the first through hole 9. It is locked to the lower end of the vertical pipe 7 facing the.

When the operating piece 13 is pushed in, the spring 4 for pressing the lock pin 3 is formed in a substantially U-shape, the lower end bent portion presses the lower end portion of the base rod 12, and the free end is the base end. Since the upper part of the rod 12 is pressed, the lock pin 3
Tilts around the lower end of the base rod 12 as a fulcrum,
Is sunk into the joint pipe 2 and is kept in a state of being disengaged from the engagement hole 17.

Next, when the vertical pipe 7 is pulled out upward, the lock pin 3 rises following the rise of the pipe 7, and the upper surface of the operating piece 13 comes into contact with the upper edge of the first through hole 9. When the lock pin 3 stops rising, the lower end of the vertical pipe 7 comes out of the locking recess 15 of the operating piece 13, and at this point the operating piece 1
3, the lock pin 3 is released from the pushing position, the lock pin 3 moves toward the outside of the joint pipe 2, and the protrusion amount of the operation piece 13 increases.

When the vertical pipe 7 is pulled out, the engaging hole 17 rises with respect to the lock piece 14, so that the tip of the lock piece 14 abuts on the inner peripheral surface of the vertical pipe 7 as shown in FIG. 2B. There is no problem in pulling out the vertical pipe 7.

When the lower end of the vertical pipe 7 passes above the lock piece 14, the lock piece 14 projects to the outer surface of the joint pipe 2, and as shown in FIG. 1, the lock pin 3 allows the vertical pipe 7 to be inserted. It will automatically return to the normal state.

As described above, the joint pipe 2 and the vertical pipe 7 can be connected simply by inserting the vertical pipe 7 into the joint pipe 2, and the operating recess 13 is pushed to insert the locking recess 15 into the vertical pipe 7. If the vertical pipe 7 is pulled out, the lock pin 3 will automatically return to the connectable posture by engaging with the lower end of the vertical pipe 7. Operation is easy and efficient.

Next, a second embodiment shown in FIGS. 5 and 6 will be described. The same parts as those in the first embodiment described above are denoted by the same reference numerals and will not be described.

As shown, the lock pin 3 is provided on the operating piece 1.
3 is provided with a notch 21 in the lower part, and in a state where the notch 21 faces the inside of the first through hole 9, the operation piece 13 has the through hole 9
The inside of the lock pin 3 can be moved up and down, and the operation pin 13 allows the lock pin 3 to be pushed in and pushed down.

As the spring 4, a leaf spring is used, and the base rod portion 1
In the middle of the upper and lower straight line portions 4a overlapping the back surface of the base 2,
Is provided with a bent portion 4b that fits into the recessed portion 22 provided on the back surface of the, and the bent portion 4c is bent at the lower end of the straight portion 4a.
The downward portion 4d is bent at the end of the bent portion 4c, and the inclined bent portion 4e is formed continuously at the upper end of the straight portion 4a. When the lock pin 3 is pushed down, the spring 4 also moves. It is like this.

The second embodiment has the above-mentioned structure, and when the vertical pipe 7 is not connected to the joint pipe 2, the lock pin 3 presses the spring 4 as shown in FIG. 6C. Thus, the operation piece 13 and the lock piece 14 are pushed toward the first and second through holes 9 and 10, and penetrate the through holes 9 and 10, respectively, and project 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 fitted on the upper half of the joint pipe 2, the lower end of the vertical pipe 7 is inserted into the inclined surface 16 of the lock piece 14 during insertion.
When the vertical pipe 7 is inserted, the inclined surface 16 causes the lock piece 14 to be pushed into the joint pipe 2, and when the lower end of the vertical pipe 7 contacts the sleeve 5, the engagement hole 17 is locked. The lock piece 14 is engaged with the engagement hole 17 so as to face the piece 14, and the joint pipe 2 and the vertical pipe 7 are shown in FIG.
As shown in (B), the upper and lower construction frames can be connected by being coupled in a retaining manner.

Next, when removing the upper vertical pipe 7, as shown in FIG. 6A, the operating piece 13 is pushed toward the inside of the joint pipe 2 and the lock piece 14 is put into the joint pipe 2. .

When the operation piece 13 is pushed down in this pushed state, the notch 21 is fitted on the lower edge of the first through hole 9 as shown in FIG. 6B, and the lock pin 3 and the spring 4 descend. ,
The tip end of the lock piece 14 is located below the lower edge of the first through hole 9, and when the operation piece 13 is unpushed in this state, the tip end flat surface 14a of the lock piece 14 moves to the vertical pipe 7 On the inner peripheral surface of the above, it comes into contact with a position below the first through hole 9 and stops.

As a result, the lock piece 14 is engaged with the engaging hole 17
Since the flat end surface 14a of the lock piece 14 is in contact with the inner peripheral surface of the inner peripheral surface of the vertical pipe 7 below the first through hole 9, the vertical flat pipe 7 is held in the vertical pipe 7 since It is possible to prevent the situation in which the lock piece 14 engages with the engagement hole 17 and the vertical pipe 7 cannot be pulled out even if the upward movement, that is, the rattling of the vertical pipe occurs.

When the vertical pipe 7 is pulled out upward from the state of FIG. 6B, the vertical pipe 7 rises with respect to the lock pin 3, and when the lower end of the vertical pipe 7 passes above the lock piece 14, 6C, the lock piece 14 projects to the outer surface of the joint pipe 2 by the pressing of the spring 4, and the lock pin 3 can automatically return to the connectable posture.

[0046]

As described above, according to the present invention, since the pipe is connected through the lock pin integrally formed with the operating piece and the lock piece, the connection with excellent tensile strength can be achieved and the arm lock can be used. It is possible to maintain the retracted state of the lock piece of the lock pin by locking the operation piece to the connected pipe, or by abutting the tip of the lock piece to the inner peripheral surface of the connected pipe. The connected pipe can be removed from the pipe by a simple operation.
Assembly and dismantling work of temporary frame scaffolding can be done safely and efficiently.

Further, since the lock pin is automatically returned to the connectable state after the pipe to be connected is pulled out, the connection can be made only by inserting the pipe to be connected, and the connection work can be performed very easily. .

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a connected state of a first embodiment of a pipe joint.

FIG. 2A is a vertical cross-sectional view showing a state during a pipe joint withdrawing operation, and FIG. 2B is a vertical cross-sectional view showing a withdrawn state of a connected pipe.

FIG. 3A is a front view of the pipe joint, and FIG.

4A is a perspective view showing a main part of a joint pipe, and FIG. 4B is a perspective view of a lock pin.

5 (A) is a front view showing a second embodiment of the pipe joint, and FIG. 5 (B) is a longitudinal sectional view showing the same connection state.

6A is a vertical cross-sectional view showing the lock pin being pushed in, FIG. 6B is a vertical cross-sectional view showing the lock pin being pushed down, and FIG. 6C is a vertical cross-sectional view showing a state after the vertical pipe is pulled out. Plan

[Explanation of symbols]

 1 pipe joint 2 joint pipe 3 lock pin 4 spring 5 sleeve 6, 7 vertical pipe 8 pin 9 first through hole 10 second through hole 12 base rod part 13 operation piece 14 locking piece 15 locking recess 16 slanted surface 17 Engagement hole

Claims (2)

[Claims] 1. A joint pipe having a large-diameter portion on an outer peripheral surface of a central portion, a first through-hole extending from the large-diameter portion to the peripheral wall, the first through-hole extending between the large-diameter portion and the peripheral wall, and a middle portion of the peripheral wall. Second
Through holes are arranged side by side in the axial direction of the joint pipe, and an operating piece to be inserted into the first through hole is provided inside the joint pipe in the middle of a base rod portion that is long along the axial direction of the joint pipe. A lock pin provided with a lock piece to be inserted into the second through hole at one end of the rod portion, and a direction in which the operation piece and the lock piece of the lock pin penetrate through the through holes and project to the outside of the joint pipe. Incorporating a spring that urges the elasticity of, the lock piece of the lock pin,
Forming an inclined surface to be pushed at the end of the connected pipe inserted into the joint pipe to push the lock piece into the joint pipe, and to the operating piece, push the operating piece into the joint pipe, A pipe joint provided with a locking recess for retaining a lock release state in which a lock piece is immersed in a joint pipe by engaging with an end portion of a connected pipe externally fitted to the joint pipe. 2. A joint pipe having a large diameter portion on an outer peripheral surface of a central portion, a first through hole extending from the large diameter portion to the peripheral wall, the first through hole extending to the large diameter portion and the peripheral wall, and the middle portion of the peripheral wall. Second
Through holes are arranged side by side in the axial direction of the joint pipe, and an operating piece to be inserted into the first through hole is provided inside the joint pipe in the middle of a base rod portion that is long along the axial direction of the joint pipe. A lock pin provided with a lock piece to be inserted into the second through hole at one end of the rod portion, and a direction in which the operation piece and the lock piece of the lock pin penetrate through the through holes and project to the outside of the joint pipe. Incorporating a spring that urges the elasticity of, the lock piece of the lock pin,
It is pushed at the end of the connected pipe inserted into the joint pipe to form an inclined surface for pushing the lock piece into the joint pipe, and the first through hole and the operation piece are pushed in and pushed down. Thus, the pipe joint is set so that the operation piece can be moved up and down in the first through hole so that the tip of the lock piece is brought into contact with the inner surface of the connected pipe to maintain the unlocked state.