JPH0620746U - Pipe connection device - Google Patents

Abstract

(57) [Abstract] [Purpose] A locking hole 2 is provided in a pipe 1 to be fitted, and a fitting pipe 3 which is slidably fitted into the pipe 1 is fitted to the fitted pipe 3 so as to overlap with the locking hole 2. A hole 4 is provided, a locking projection 5 is arranged in the mounting hole 4 so as to project toward the fitting pipe 3, and a slide push-back taper portion 6 is formed at the tip of the locking projection 5. In a pipe connecting device in which a locking projection 5 is fitted into a locking hole 2 of a pipe 1 into which the locking projection 5 is fitted so as to lock and connect the pipes 1 and 3, the locking projection 5 is inserted into the mounting hole 4. To provide a pipe connecting device which can be attached and detached extremely easily without considering the direction of the slide push-back taper portion 6. [Structure] A mounting body 7 is projectingly provided on an outer surface of the fitted pipe 3, and an undulating body 8 is projectingly erected on the mounting body 7 substantially along the pipe length direction, and is mounted on a tip of the undulating body 8. A locking projection 5 is provided so as to project in the hole 4, and the undulating body 8 is locked by the holding locking body. In this locking state, the locking projection 5 is arranged in the mounting hole 4, 8 A pipe connecting device configured such that the bending locking projection 5 of itself can be pushed back and moved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting device in which one pipe to be fitted is slid into the other pipe to be fitted and the pipes are joined and fixed in a locked state.

[0002]

[Prior art]

 For example, when a pipe-shaped support is to be fitted and connected to the connecting pipe portion at the end of the jack base, for example, in the case of supporting work for scaffolding for construction, as shown in FIG. Is provided in the support.

A fitting hole which is provided with a locking hole 2 at a predetermined position of a pipe 1 to be fitted (for example, a connecting pipe portion at an end of a jack base as described above) and which is slid and fitted into the pipe 1 to be fitted. 3 (support) is provided with a mounting tube 4 which can overlap and overlap with the locking hole 2.

A screw cylinder portion 10 is connected to the mounting hole 4, a mounting cylinder 11 is screwed to the screw cylinder portion 10, and a nut 12 is used for fastening and fastening.

An elastic body (not shown) is arranged in the mounting cylinder 11, and a locking projection 5 which is biased by the elastic body is projected from the mounting hole 4 into the fitted pipe 3. It is arranged in a protruding state, and this locking projection 5 is provided so as to be pushed back and movable against the elastic body.

Further, a slide push-back taper portion 6 is formed at the tip of the locking projection 5 by cutting the side to be the slide direction on an inclined plane.

Therefore, in the conventional pipe connecting device, when the fitted pipe 3 is slid and inserted into the pipe 1, the locking projections 5 projecting into the fitted pipe 3 from the inside of the mounting holes 4 are provided on the outer surface of the pipe 1. However, the locking projection 5 is pushed back through the slide push-back taper portion 6 of the locking projection 5 to be in the retracted state, and the fitting slide of the fitted pipe 3 advances in this retracted state. When the locking hole 2 of the pipe 1 and the mounting hole 4 of the fitted pipe 3 overlap and overlap with each other, the locking protrusion 5 pushed back through the slide push-back taper portion 6 projects back to project inside the locking hole 2. The pipes 1 and 3 are protruded to engage with each other by automatic locking, and the pipes 1 and 3 are locked and connected so as to prevent them from coming off.

In the pipe connecting device shown in the figure, a stepped portion 13 on which the fitted pipe 3 abuts is formed on the peripheral surface of the pipe 1, and when the end edge of the fitted pipe 3 abuts on the stepped portion 13, a locking hole is formed. 2 and the mounting hole 4 are designed so as to overlap with each other.

[0009]

[Problems to be solved by the device]

 However, the above-mentioned conventional pipe connecting device has the following drawbacks. When the locking projection 5 is attached, the slide push-back taper portion 6 formed on the locking projection 5 is directed toward the slide direction side of the fitting pipe 3, and the sliding push-back taper portion is formed by sliding the fitting pipe 3. The force exerted on 6 must push back the locking projection 5 so that the fitted pipe 3 can be smoothly slid and inserted.

Therefore, in the conventional pipe connecting device, if the mounting cylinder 11 in which the locking projection 5 is housed in the protruding state is simply screwed into the screw cylinder portion 10 connected to the mounting hole 4, the engagement can be achieved by screwing. Since the stopper projection 5 rotates and the slide push-back taper portion 6 does not have the predetermined orientation, a mark indicating the direction of the slide push-back taper portion 6 is provided on the mounting cylinder 11, and the direction of the slide push-back taper portion 6 is indicated by this mark. The mounting tube 11 must be screwed in to a proper position, and the nut 12 must be tightened and fixed with a tool such as a spanner while keeping this state.

Therefore, not only is the mounting cylinder 11 screwed in, but the work of mounting the locking projection 5 is very troublesome because it involves the step of tightening the nut 12.

In particular, when the pipes 1 and 3 are uncoupled and the fitted pipe 3 is pulled out, the locking projection 5 is removed, so that the locking projection 5 is attached and removed quite frequently. Therefore, it is very inconvenient and difficult to attach and remove the locking projection 5, which is an important problem to be solved. Further, as described above, the process of welding the screw cylinder portion 10 to the mounting hole 4 and the locking projection 5 and the elastic body for urging the projection must be internally provided in the mounting cylinder 11, and the manufacturing process is also required. It is very troublesome, and as a result, it is very expensive, and the cost of the support provided with it is also high.

It is a technical subject of the present invention to solve such drawbacks and to provide a pipe connecting device excellent in practicality.

[0014]

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

A locking hole 2 is provided at a predetermined position of the pipe 1 to be fitted, and a fitting pipe 3 which is slidably fitted into the pipe 1 to be fitted is fitted with a fitting hole 4 which can overlap with the locking hole 2. The engaging projection 5 is disposed in the mounting hole 4 so as to project toward the fitting pipe 3, and the slide push-back taper portion 6 is formed at the tip of the engaging projection 5. The stopper projection 5 is pushed back and movable, and is configured to be in a protruding biasing state. The locking projection 5 is locked and fitted into the locking hole 2 of the pipe 1 to be fitted, and the pipes 1 In a pipe connecting device that locks 3 so as not to come off, a mounting body 7 is provided on the outer surface of the fitted pipe 3, and an undulating body 8 is undulated on the mounting body 7 substantially along the pipe length direction. And the locking projections 5 projectingly arranged in the mounting holes 4 are attached to the tips of the undulations 8. The holding projection 9 is provided on the mounting body 7 and holds the undulating body 8 with the locking projection 5 projectingly arranged in the mounting hole 4. The locking projection 5 is pushed back in this state. The pipe connecting device is characterized in that the undulating body 8 itself is set to have a predetermined flexural elasticity so as to be movable, or an elastic body for urging and projecting the locking projection 5 is attached to the undulating body 8. .

[0016]

[Action]

 The undulating body 8 is moved up and down to be retained and locked by the holding and locking body 9, and the locking projection 5 attached to the tip of the undulating body 8 is fitted into the mounting hole 4 provided in the fitted pipe 3 into the fitted pipe 3 It is arranged and held in a protruding state toward the inside.

In this state, the sliding push-back taper portion 6 of the locking projection 5 attached to the undulating body 8 in a predetermined direction is always positioned on the slide fitting direction side of the fitted pipe 3. When this fitted pipe 3 is slid into the pipe 1, the slide push-back taper portion 6 is pressed against the outer surface of the pipe 1, and the locking projection 5 is pushed back against the elasticity of the undulating body 8 or the elasticity of the elastic body. Thus, the fitting slide of the fitting pipe 3 advances in this immersed state. When the locking hole 2 of the pipe 1 and the mounting hole 4 of the fitted pipe 3 overlap and overlap with each other, the locking protrusion 5 pushed back through the slide push-back taper portion 6 returns and projects into the locking hole 2. The pipes 1 and 3 are locked and connected so that they will not come off.

[0018]

【Example】

 In this embodiment, the present invention is applied to a building support connecting device. Therefore, in this embodiment, the fitted pipe 3 is a building support, and the fitted pipe 1 is a building support. It is a connecting pipe part at the end of the jack base.

The present embodiment will be described below.

The pipe 1 is formed with a stepped portion 13 against which the fitting insertion tip edge of the fitting pipe 3 abuts. A circular locking hole 2 is provided on the peripheral surface of the pipe 1, and the peripheral surface of the fitted pipe 3 is in communication with the locking hole 2 when the fitted pipe 3 is fitted and inserted until it abuts on the stepped portion 13. A mounting hole 4 is provided so as to overlap with the above.

At the circumferential position of the mounting hole 4 of the fitted pipe 3 in the pipe length direction, both lower ends are welded to form a U-shaped plate-shaped mounting body 7.

A shaft hole 14 is provided in both left and right wall portions of the mounting body 7, and both the left and right base end portions of the undulating body 8 constituted by a U-shaped wire rod are inserted into the shaft hole 14 for mounting. An undulating body 8 is erected on the mounting body 7 toward the upper part of the hole 4 so as to be undulating.

On the left and right sides of the U-shaped undulating body 8, finger ring 15 is formed by winding and bending so that a circular ring is once formed in the middle of the linear rod.

A locking projection 5 is attached to the tip of the undulating body 8.

At the tip of the locking projection 5, a slide push-back taper portion 6 is formed by cutting the slide direction side into an inclined plane shape, and the slide push-back taper portion 6 is properly positioned on the slide direction side. The locking projection 5 is provided at the tip of the undulating body 8 in an inserted state.

The holding and locking body 9 is formed by forming a pushing projection on the inner surface of the mounting body 7 facing the rising wall, and the undulating body 8 is abutted and locked on the lower edge of the projection. In this locked state, the tip of the locking projection 5 is arranged so as to project into the fitted pipe 3 from the mounting hole 4 and this state is maintained. Further, when the finger holding wheel 15 is pushed by a finger to get over the holding and locking body 9 to raise the undulating body 8, the locking projection 5 is taken out from the mounting hole 4.

In addition, when the undulations 8 are raised so that the locking projections 5 are lifted high, and at the same time, the mounting body 7 is left and right on the upper surface of the mounting body 7 so as not to easily come off due to the excessive lifting. A recess 16 is formed in the recess. Therefore, in the present embodiment, when the undulating body 8 is lifted, the undulating body 8 is held in a state of riding on the holding and locking body 9, and if the undulating body 8 is simply pressed from this state, the undulating body 8 is held. After passing through the stopper 9, the locked state is established as described above. In this state, the locking projection 5 attached to the tip of the undulating body 8 enters the mounting hole 4 and is projected into the fitted pipe 3 so that the sliding push-back taper portion of the locking projection 5 is automatically provided. 6 is positioned on the proper slide direction side.

Further, the locking projection 5 is provided so as to be able to push back and move against the flexural elasticity of the undulating body 8 itself in this locked state.

In this state, the fitted pipe 3 is slid and inserted, but the protruding locking projection 5 is pressed against the outer surface of the pipe 1, and the undulating body 8 is bent by the component force received by the slide push-back taper portion 6. The locking projection 5 is pushed back by all the way and the locking projection 5 is retracted, and in this retracted state, the fitting slide of the fitting pipe 3 advances. When the locking hole 2 of the pipe 1 and the mounting hole 4 of the fitted pipe 3 are overlapped with each other, the locking projection 5 pushed back through the slide push-back taper portion 6 projects back and projects into the locking hole 2. It is configured so that the pipes 1 and 3 are locked and connected so that the pipes 1 and 3 do not come off.

[0030]

[Effect of device]

 Since the present invention is configured as described above, the slide push-back taper portion can be positioned at an appropriate position simply by tilting the undulating body, without the need to consider the positioning of the slide push-back taper portion when attaching and detaching the locking projection. In such a state, the locking projection is arranged in the mounting hole, and it can be pushed back by a predetermined distance and is arranged in a protruding biasing state, and the locking projection is disengaged simply by lifting the undulating body. Therefore, unlike the conventional example, no troublesome work such as nut tightening in consideration of positioning of the slide push-back taper part is required, and the attachment and detachment of the locking projection can be performed very easily. Therefore, the pipe connecting device has excellent workability.

Further, since the configuration is extremely simple as compared with the conventional example, the pipe connecting device is excellent in mass productivity and can be provided with an inexpensive product, and is extremely practical.

[Brief description of drawings]

FIG. 1 is a perspective view of a connected state of this embodiment.

FIG. 2 is an enlarged plan view of a main part of the present embodiment in a connected state.

FIG. 3 is a side sectional view of a main part of the present embodiment in a connected state.

FIG. 4 is a perspective view of a main part in a connected state according to the present embodiment.

FIG. 5 is a side sectional view of a main part of a conventional example in a connected state.

[Explanation of symbols]

 1 Pipe 2 Locking Hole 3 Fitted Pipe 4 Mounting Hole 5 Locking Protrusion 6 Slide Push Back Tapered Part 7 Mounting Body 8 Unfolding Body 9 Holding Locking Hole

Claims (1)

[Scope of utility model registration request] 1. A locking hole is provided at a predetermined position of a pipe to be fitted, and a fitting pipe which is slidably fitted into the pipe to be fitted is provided with an attachment hole which can overlap with the locking hole. A locking projection is arranged in the mounting hole in a protruding state toward the fitted pipe, and a slide push-back taper portion is formed at the tip of this locking projection, and this locking projection is pushed back to be movable. Further, in a pipe connecting device configured to be in a protruding biasing state, the locking protrusion is locked and fitted in a locking hole of the pipe to be fitted to prevent the pipes from coming off and to be locked and coupled.
A mounting body is provided on the outer surface of the pipe to be fitted, and an undulating body is erected on the mounting body along the pipe length direction so that the undulating body can be undulated. The retaining projection is attached to the mounting body, and the retaining projection for holding the undulating body is provided on the mounting body with the locking projection projectingly provided in the mounting hole. In this state, the retaining projection pushes back. A pipe connecting device characterized in that an undulating body is set to have a predetermined flexural elasticity so as to be movable, or an elastic body is attached to the undulating body to urge the locking projections to project.