JP2500345Y2 - Pipe fittings - 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 connecting various metal pipes.

[0002]

2. Description of the Related Art In the case of constructing a pipe structure using various metal pipes, a pipe joint for connecting the pipes is required. For example, to construct a temporary scaffold for construction, a metal pipe is used to form a gate type. It is assembled by connecting the torii-shaped building frames with pipe joints.

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

[0004]

The conventional pipe joints described above, however, have a problem in that it is difficult and troublesome to carry out the work because it is necessary to simultaneously operate a plurality of places for connecting and disassembling the pipes.

In view of this, the present invention provides a pipe joint in which the pipes can be automatically connected by simply inserting the pipes, the operation at the time of disassembling can be simplified, and the pipes can be disassembled easily and efficiently. The challenge is to provide.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a lock piece which is bent in the same direction at the upper end and the lower end of a lock member housed in a joint pipe. The lock plate is connected to the joint pipe so that it can swing vertically, and the upper end lock is connected to the joint pipe.
A through hole for the lock piece, a through hole for the lower end lock piece, and a through hole for allowing the lock plate to swing up and down ,
With the spring incorporated in this joint pipe, the upper and lower lock pieces and the lock plate for each of the lock member and the lock plate bias the elasticity in the direction of projecting to the outside of the joint pipe from the respective through holes, and Attach this lock plate to the end of the plate
The upper end of the lock member into the fitting pipe.
In a state of being turned, it is obtained by adopting the configuration in which the engageable curved stepped portion below end of the connecting pipe inserted fitted from the upper side to the joint pipe.

[0007]

When the connected pipe is inserted into the joint pipe in a state where the lock piece and the lock plate are projected to the outside of the joint pipe, the connected pipe pushes the lock piece at the inner peripheral surface of the end, and the lock provided on the connected pipe. When the dowel hole 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 pipe to be connected is pulled out, the lock plate may be pushed in. The lock piece is recessed in the joint pipe, and is disengaged from the engaging hole, and the bent step portion of the lock plate is the end portion of the pipe to be connected. To hold the lock piece in the retracted state.

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, Return to the connectable state of the connected pipe.

[0010]

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

As shown in FIGS. 1 to 5, the pipe joint includes 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 middle 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 piece 2 is provided at a position slightly above the through hole 10. Through holes 12 are provided so as to be linearly aligned along the axial direction. The connected pipes 8 and 9 are provided with engagement 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 FIGS. 1 and 2, a square shape, and a lower half portion thereof is formed by cutting out the upper portion of the collar 7 integrally. It is provided.

The lock member 4 is made of a metal shaft material and is formed in a "dogleg shape" which is bent at a position near the upper part. A flat portion 15 is formed at this bent portion and the upper and lower end portions are formed in the same direction. It has a structure in which lock pieces 2 and 3 which are bent inward 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 the joint pipe 1
Is an abutting surface 18 perpendicular to the inner surface of, and the lower end is an inclined surface 19.

As shown in FIGS. 1 and 3, the lock plate 6 has an operating piece 20 having a width that penetrates the through hole 10.
A bifurcated portion 21 that is wider than the operation piece 20 and fits outside the flat portion 15 of the lock member 4 is provided at the rear end, and the rear end of the bifurcated portion 21 is bent slightly downward and the joint pipe is A bent step portion 22 engageable with the lower end portion of the upper connected pipe 8 is formed in an upward U-shape at the tip of the operation piece 20 protruding to the outside of 1, and the flat portion 15 can be swung in the vertical direction. It is installed so that.

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 the assembled state of the pipe joint,
The spring 5 causes the lock member 4 and the lock plate 6 to pass through the through hole 1
When the lock member 4 is pushed toward 0, 11, 12, the lock pieces 2, 3 of the lock member 4 are fitted into the through holes 11, 12, and the abutting surfaces 17, 1,
8 abuts on the inner surface of the joint pipe 1, and the upper and lower lock pieces 2,
The inclined surfaces 16 and 19 of 3 face the outside of the joint pipe 1.

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 abut on the inner surface of the joint pipe 1. 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 rotational elasticity is urged, and the upper surface of the operation piece 20 has the through hole 10. It is in contact with the upper edge.

The pipe joint of the present invention is constructed as described above, 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 part 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 lock piece 2 is pushed inward by the inclined surface 16, and when the lower end comes into contact with the collar 7, the engaging hole 14 faces the lock piece 2 and is returned as shown in FIG. 2 is engaged with the engaging 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, 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.

By pushing in the lock plate 6,
The upper part of the lock member 4 is pushed, and the lock member 2 tilts about the lower contact surface 18 as a fulcrum, and the lock piece 2 is pulled out from the engagement hole 14 and held in the retracted state.

When the connected pipe 8 is pulled up in this state,
Since the lock plate 6 rotates upward together with the connected pipe 8 and stops when it abuts on the upper edge of the through hole 10,
When the connected pipe 8 further rises, the engagement of the lower end portion with the bent step portion 22 is released, 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 abuts on the inner surface of the connected pipe 1, but there is no hindrance to pulling out the connected pipe 8. When the connected pipe 8 is completely removed, the spring 5 is pressed. As a result, the lock piece 2 protrudes from the through hole 12 to the outside and returns to the state of 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 removing the connected pipe 8. Since it is sufficient to push the lock plate 6 to lock the bent step portion 22 to the end portion of the connected pipe 8, the operation can be performed by a one-touch operation, and the pipe joint can be connected after the connected pipe 8 is removed. It will be automatically returned to.

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

As is well known, the rotary lock joint is
The lower end of the joint pipe, which is provided with a collar on the outer circumference, is provided with a long hole in the circumferential direction for connecting with the upper end of the lower building frame with a pin, and is attached to the lower building frame so that it can be rotated at a fixed angle, and the joint This is a structure in which L-shaped engaging recesses or engaging cutouts are provided at positions on both sides of the axial center of the pipe, and the lower end of the upper building frame engages with the engaging recesses or cutouts. The protrusion is provided at a position facing the inner peripheral surface.

When the upper building frame is externally fitted to the joint pipe, the protrusion is fitted into the vertical portion of the engaging recess or the notch, and then the joint pipe is rotated, the horizontal portion of the engaging recess or notch is projected. , And the upper building frame will be coupled 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 shown cannot be used as it is.

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

In this case, the lock piece 2 is attached to the connecting pipe 1.
The engagement hole 14 may be provided at a position corresponding to.

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

[0035]

[Effects of the Invention] As described above, according to this invention, the joint
Connection of the connection pipe, together with the automatically performed to the pipe, the lock portion of the lock plate when sampling at you push
The upper locking piece timber is turned, it is only engaged under the end portions of the connecting pipe, a combined operation is not required, the
When the connecting pipe is pulled out, the upper lock piece and lock plate
Automatically returns to its original position, which greatly simplifies the work of connecting and disconnecting pipes and improves the work efficiency of pipe connection.

[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 reference numerals] 1 joint pipe 2, 3 lock piece 4 lock member 5 spring 6 lock plate 10, 11, 12 through hole 15 flat portion 16, 19 inclined surface 22 bent step portion

Claims (1)

(57) [Scope of utility model registration request] 1. A lock member housed in a joint pipe is provided with a lock piece that bends in the same direction at the upper end and the lower end, and a lock plate is connected in the middle of the lock member so as to be vertically swingable, Penetration of the upper lock piece into the fitting pipe
Hole and through hole of bottom lock piece and lock plate up and down
A through hole is provided so that it can swing freely, and with the spring incorporated in this joint pipe, the upper and lower lock pieces and the lock plate are respectively attached to the lock member and the lock plate from the respective through holes to the outside of the joint pipe. By pushing the elasticity of the lock plate into the joint pipe at the tip of the lock plate protruding outside the joint pipe .
The upper lock piece of the lock member was put into the joint pipe.
State, a pipe joint provided with engageable curved stepped portion below end of the connecting pipe inserted fitted from the upper side to the joint pipe.