JPH0671755U - Pipe fittings - Google Patents

Abstract

(57) [Summary] [Purpose] To enable connection and disconnection of pipes with one-touch operation. A lock member 4, a lock plate 6, and a spring 5 for pressing them toward the through holes 10, 11, 12 are housed in the joint pipe 1, and the lock member 4 has through holes 11 at upper and lower ends. Lock pieces 2 and 3 penetrating through the lock plate 6 are attached to the flat portion 15 of the lock member 4 such that the lock plate 6 can swing up and down, and the end of the connected pipe 8 is attached to the tip of the lock plate 6. A bent step portion 22 that can be engaged with the connecting pipe 8 is provided so that the joint pipe 1 can be connected simply by inserting the connected pipe 8 and the lock plate 6 can be removed by pushing it in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint for connecting various metal pipes.

[0002]

[Prior art]

 When constructing a pipe structure using various metal pipes, pipe joints that connect the pipes to each other are required.For example, to construct a temporary scaffold for construction, use metal pipes to form a gate type or torii type. The assembled building frames are connected by pipe joints and assembled.

Various structures have been proposed for pipe joints for connecting building frames in order to construct the temporary scaffolding as described above.

[0004]

[Problems to be solved by the device]

 However, in each of the above-mentioned conventional pipe joints, it is necessary to operate a plurality of places at the same time for connecting and disassembling the pipes, so that there is a problem that the work is difficult and troublesome.

In view of the above, the present invention is capable of automatically connecting pipes by simply inserting them, simplifying the operation at the time of dismantling, and connecting and dismantling the pipes easily and efficiently. The challenge is to provide joints.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a lock piece at the upper end of a lock member housed in a joint pipe, and a lock plate is provided in the middle of the lock member so that the lock plate can be vertically swung. The joint pipe is provided with a through hole for the lock piece and a through hole for the lock plate, and a spring incorporated in the joint pipe allows the lock piece and the lock plate to pass through the lock member and the lock plate respectively. The elastic force is applied to the joint pipe from the hole so as to project outward, and the end of the connected pipe inserted into the joint pipe is inserted into the end of the lock plate that protrudes to the outside of the joint pipe. It adopts a structure provided with a curved step portion.

[0007]

[Action]

 When the connected pipe is inserted into the joint pipe with the lock piece and the lock plate protruding to the outside of the joint pipe, the connected pipe pushes the lock piece at the inner peripheral surface of the end, and the engagement hole provided in this connected pipe. When the lock piece faces the lock piece, the lock piece engages with the engagement hole, and the joint pipe and the connected pipe are connected to each other in a detached state.

When the connected pipe is pulled out, the lock plate may be pushed in. The lock piece is retracted into the joint pipe and is disengaged from the engaging hole, and the bent step portion of the lock plate is connected to the end of the connected pipe. The lock piece is engaged to maintain the retracted state of the lock piece.

When the connected pipe is pulled out, the lock piece pressed by the spring comes into contact with the inner surface of the connected pipe, and when the connected pipe completely passes, the projecting piece and the lock plate return to the projecting position. , The connected pipe returns to the connectable state.

[0010]

【Example】

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

As shown in FIGS. 1 to 5, the pipe joint has a joint pipe 1, lock pieces 2 and 3 at upper and lower ends, and a lock member 4 incorporated in the joint pipe 1, and also inside the joint pipe 1. The joint pipe 1 has a collar 7 fixed to the outer periphery of the intermediate portion, and the end portions of the connected pipes 8 and 9 respectively inserted from both ends contact the collar 7. The connection state is established by touching.

In the joint pipe 1, the through hole 10 of the lock plate 6 is provided at the portion where the collar 7 is provided, the through hole 11 of the lock piece 3 is provided at the lower end portion, and the lock is provided at a position slightly above the through hole 10. The through holes 12 of the piece 2 are provided so as to be linearly aligned along the axial direction. The connected pipes 8 and 9 are provided with engaging holes 13 and 14 at positions corresponding to the through holes 11 and 12, respectively.

The upper and lower through-holes 11 and 12 are formed in a circular shape, and the central through-hole 10 is, as shown in FIG. 1 and FIG. 2, in a position where the lower half is integrally cut out at the upper portion of the collar 7. It is provided.

The locking member 4 is made of a metal shaft material and is formed in a "dogleg shape" that is bent at a position near the upper portion. A flat portion 15 is formed at this bending portion, and the same upper and lower end portions are formed. It has a structure in which lock pieces 2 and 3 which are bent in the direction and fit into the upper and lower through holes 11 and 12 are integrally provided.

The upper lock piece 2 has an inclined surface 16 at the upper end surface, the tip of which descends downward, and the inner position of the base of the bent portion is a contact surface 17 perpendicular to the inner surface of the joint pipe 1, and the lower lock piece 3 also. The inner position of the base of the bent portion is a contact surface 18 perpendicular to the inner surface of the joint pipe 1, and the lower end is an inclined surface 19.

As shown in FIGS. 1 and 3, the lock plate 6 has a width wider than the operation piece 20 at the rear end of the operation piece 20 having a width that penetrates the through hole 10. A bifurcated portion 21 that is fitted onto the portion 15 is provided, the rear end of the bifurcated portion 21 is bent slightly downward, and the tip of the operation piece 20 protruding to the outside of the joint pipe 1 is attached to the tip of the upper connected pipe 8. A bent step portion 22 that can be engaged with the lower end portion is formed in an upward U-shape, and is attached to the flat portion 15 so as to be vertically swingable.

The spring 5 is a leaf spring whose upper and lower ends are in contact with the inner surface of the joint pipe 1, and a bent portion 23 which engages with the rear end of the forked portion 21 of the lock plate 6 is provided in the middle portion, and the lower end portion is provided. A bent piece 24 for pressing the lower part of the lock member 4 is formed in series.

FIG. 2 shows an assembled state of the pipe joint, in which the lock member 4 and the lock plate 6 are pushed toward the through holes 10, 11, 12 by the spring 5, and the lock member 4, the lock pieces 2, 3 are pushed. The contact surfaces 17 and 18 are fitted in the through holes 11 and 12, the contact surfaces 17 and 18 contact the inner surface of the joint pipe 1, and the inclined surfaces 16 and 19 of the upper and lower lock pieces 2 and 3 face the outer side of the joint pipe 1. It

The lock plate 6 is bent when the bifurcated portion 21 is fitted onto the flat portion 15 of the lock member 4 and the step portions on both sides of the operation piece 20 and the bifurcated portion 21 contact the inner surface of the joint pipe 1 to bend. Since the step portion 22 is located outside the joint pipe 1 and the rear end of the bifurcated portion 21 is pressed by the spring 5, upward rotation elasticity is urged, and the upper surface of the operation piece 20 is pushed through the through hole 10. Abuts the upper edge of.

The pipe joint of the present invention has the above-described structure, the connected pipe 9 is inserted in the lower portion of the joint pipe 1, and the engaging hole 13 engages with the lock piece 3 as shown in FIG. However, it is connected in a locked state.

In order to connect the connected pipe 8 to the upper portion of the joint pipe 1, the connected pipe 8 may be externally fitted and inserted into the joint pipe 1 with respect to the pipe joint in the state shown in FIG. The lower end of the ip 8 pushes the upper lock piece 2 inward by the inclined surface 16, and when this lower end contacts the collar 7, the engaging hole 14 faces the lock piece 2 and returns as shown in FIG. The lock piece 2 is engaged with the engagement hole 14, and the connected pipe 8 is connected to the joint pipe 1 in a retaining manner.

At this time, in the lock plate 6, as shown in FIG. 4, the upper surface of the operation piece 20 is pushed down by the lower end portion of the connected pipe 8 to be in a substantially horizontal state, and the lock plate 6 comes out from the upper edge of the through hole 10. Leave.

Next, in order to remove the connected pipe 8, the lock plate 6 is pushed in as shown in FIG. 5, and the bent step portion 22 is engaged with the lower end portion of the connected pipe 8.

When the lock plate 6 is pushed in, the upper portion of the lock member 4 is pushed, and the lock member 4 is tilted about the lower contact surface 18 as a fulcrum, and the lock piece 2 is retained in a state of being pulled out from the engaging hole 14 and being depressed. It

When the connected pipe 8 is pulled up in this state, the lock plate 6 rotates upward together with the connected pipe 8 and stops when it comes into contact with the upper edge of the through hole 10, so that the connected pipe 8 When is further raised, the lower end portion is disengaged from the bent step portion 22, and the lock plate 6 moves so as to project outward as shown in FIG.

At this point, the lock piece 2 of the lock member 4 comes into contact with the inner surface of the connected pipe 1, but there is no problem in pulling out the connected pipe 8. When the connected pipe 8 is completely pulled out, the spring 5 is pressed. As a result, the lock piece 2 projects outward from the through hole 12 and returns to the state shown in FIG. 2, so that the next pipe connection becomes possible.

As described above, the connected pipe 8 can be connected to the joint pipe 1 automatically by simply inserting the connected pipe 8 into the joint pipe 1 and inserting the connected pipe 8 into the joint pipe 1. The removal can be done by pushing the lock plate 6 and locking the bent step 22 to the end of the connected pipe 8, so that it can be done by a one-touch operation. Moreover, after removing the connected pipe 8, the pipe joint is connected. It will automatically return to a possible state.

Next, FIGS. 6 (A) and 6 (B) exemplify a pipe joint for dealing with a building frame of a type to be connected using a rotation lock joint.

As is well known, the rotary lock joint is provided with a circumferential long hole at the lower end of a joint pipe provided with a collar on the outer periphery for connecting with an upper end of a lower building frame by a pin, and is fixed in the lower building frame. It is mounted so that it can rotate freely at an angle, and has L-shaped engaging recesses or engaging cutouts at the upper and lower ends of the joint pipe on both sides of the axis, and the lower end of the upper building frame. A protrusion that engages with the engaging recess or notch is provided at a position facing the inner peripheral surface.

When the upper building frame is externally fitted into the joint pipe, the protrusion is fitted into the vertical portion of the engaging recess or cutout, and then the joint pipe is rotated, the horizontal portion of the engaging recess or cutout is formed. It engages with the protrusion, and the upper building frame is joined in the retaining state.

As described above, the building frame corresponding to the rotation lock type pipe joint has the projections 31 and 31 on the inner surface of the vertical column to be the connected pipe 8, as shown in FIG. The joint pipe 1 indicated by can not be used as it is.

Therefore, as shown in FIG. 6, when the recessed grooves 32, 32 for accommodating the protrusions 31, 31 are formed by bending at the upper end of the joint pipe 1 on both sides of the axis, the rotation lock type joint is formed. It is possible to combine even in the building frame.

In this case, the connecting pipe 1 may be provided with the engaging hole 14 at a position corresponding to the lock piece 2.

In the case of connection of pipes, a construction frame for temporary scaffolding is shown as an example, but it can be naturally used for connecting pipes for other purposes, and the lower half of the joint pipe 1 can be used. Although another connected pipe 8 is connected to this, the joint pipe itself may be the connected pipe.

[0035]

[Effect of device]

 As described above, according to the present invention, the pipes can be connected automatically, and at the time of withdrawal, it is sufficient to push the lock plate and lock it on the end of the pipe to be connected, eliminating the need for complex operation. As a result, the work of connecting and disconnecting pipes is greatly simplified, and the work efficiency of pipe connection can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a pipe joint according to the present invention.

2A is a vertical cross-sectional view showing a state before connection of a pipe joint, and FIG. 2B is a cross-sectional plan view taken along the line BB in FIG. 2A.

FIG. 3 is a vertical sectional view showing a pipe connection state of a pipe joint.

FIG. 4 is a vertical sectional view showing a state in which a lock plate is pushed in for pulling out a pipe.

FIG. 5 is a vertical cross-sectional view showing the middle of pipe withdrawal.

6A is a longitudinal sectional view of a pipe joint corresponding to a rotation lock type building frame, and FIG. 6B is an exploded perspective view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint pipe 2, 3 Lock piece 4 Lock member 5 Spring 6 Lock plate 10, 11, 12 Through hole 15 Flat part 16, 19 Sloping surface 22 Bending step part

Claims (1)

[Scope of utility model registration request] 1. A lock piece is provided at an upper end of a lock member housed in a joint pipe, a lock plate is connected to the lock member so as to be vertically swingable, and the lock piece penetrates through the joint pipe. Holes and through holes for the lock plate are provided, and with the spring incorporated in the joint pipe, the lock piece and the lock plate in each of the lock member and the lock plate are arranged in the direction in which the lock piece and the lock plate project from the through holes to the outside of the joint pipe. A pipe joint which biases elasticity and has a bent step portion which is engageable with an end portion of a connected pipe which is externally fitted and inserted into the joint pipe at a tip of the lock plate projecting to the outside of the joint pipe.