JPH027018Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention involves connecting the pipes in series by inserting resin jointers into the inner surfaces of both ends of the pipes in the previous process when coating the outer surfaces of small-diameter pipes with resin. This invention relates to a jointer removal device after continuous coating.

(Prior Art) A conventional method of connecting two small-diameter pipes with a resin jointer, coating the pipes, and then cutting and extracting the jointer will be described with reference to FIG.

First, A in the figure shows the work of connecting pipes in series, and jointers are inserted into the inner surfaces of both ends of each pipe to connect the pipes by frictional force. Next, the outer surface of the pipe is coated at B in the figure, and the center portion of the jointer is cut at C in the figure. In the final step, cut the covering part as shown in D in the figure and remove the jointer.

In such a work process, in the final step of removing the joint, the worker uses tools such as pliers to grasp the end of the joint and pull it out.

In addition, as a conventional technology related to jointers, there is one described in Japanese Patent Application Laid-open No. 122364/1983, but its purpose is to attach special dummies to both ends of a metal tube whose surface is to be coated with resin. This is a technology related to the jointer itself, which prevents the film from being exposed during film formation by covering the entire surface, and is different from the technical scope of the present invention.

(Problem that the invention aims to solve) In conventional removal work by workers, the pipes are lined up in parallel and two workers are assigned on both sides.
In addition to being expensive, it required a large work space.

Furthermore, it is most efficient to carry out a series of removal operations in the production line for coated pipes, but this requires the intervention of a worker during the removal operations.
Problems arose in terms of safety and work efficiency.

(Purpose of the invention) In view of the problems of the prior art described above, the object of the present invention is to provide a fully automatic jointer removal device.

(Means for Solving the Problems) The present invention achieves the above-mentioned purpose, and its gist is to press the inner sleeve that goes inside the jointer inserted into the inner surface of the pipe end and the end face of the jointer, and to An outer sleeve that slides with a spring is arranged concentrically in the direction of the tube axis, and on the outer surface of the pipe there is a presser claw for grasping and pulling out the jointer, a claw holder that supports this claw with a spring, and a claw holder from the outer circumferential direction of the pipe. This pipe jointer removal device is characterized in that a plurality of external clamp devices each consisting of a presser cylinder that is moved perpendicularly to the pipe axis are arranged in the outer circumferential direction.

The apparatus of the present invention will be explained below using the embodiment shown in FIG.

(Example and operation) The jointer removal device in the present invention is the first
As in the embodiment shown in the figure, an inner sleeve 2 that enters the inner surface of the jointer 1 and an outer sleeve 4 that presses the end face of the jointer and slides in the axial direction of the pipe by means of a spring 5 are arranged concentrically in the axial direction of the pipe, and are placed on the outer surface of the pipe. The external clamp is composed of a presser claw 6 for grasping and pulling out the jointer 1, a claw holder 8 that supports this claw with a spring 9, and a presser cylinder 11 that moves the claw holder 8 from the outer circumferential direction of the tube perpendicular to the tube axis. This is a pipe jointer removal device with multiple devices arranged around the outer circumference.

The jointer removal device according to the present invention is the first
The effect shown in FIGS. 2 and 2 is achieved. That is, the covered pipe 13 into which the jointer 1 is inserted is cut at the entire circumference at the boundary between the end of the pipe and the jointer 1 (the jointer is not cut at this time), and then the pipe 13 is fixed to the fixing device 12. When the head is fixed with the pipe 13 in Fig.
When the pipe moves forward toward the end of the pipe, the inner sleeve 2 is inserted into the jointer 1 at the end of the pipe.

The tip of the inner sleeve 2 is tapered and is designed to ensure that even if the pipe 13 is misaligned due to bending, etc., it will enter the jointer 1 reliably. It has the function of ensuring reliable contact with the end face of the jointer 1. The outer sleeve 4 is supported by the inner sleeve 2 and the shaft 3, and has a structure that allows it to slide in the front and back direction.
Due to the spring 5, it is located at the forward end in the released state. The tip of the inner sleeve 2 protrudes slightly from the end face of the outer sleeve 4, so when the head of the jointer removal device moves forward, the inner sleeve 2 first enters the jointer 1 and corrects the position, then the end face of the jointer 1. When the outer sleeve 4 comes into contact with the head and the head moves forward, the outer sleeve 4 is moved by the spring 5 by the jointer 1.
The head stops at the forward limit while retracting while retracting.

In this position, the presser pawl 6 is located near the center of the portion of the jointer 1 that is not inserted into the pipe.

The presser claw 6 is fixed to the claw holder 8 with a bolt 7, and the tip has a wedge shape on one side.
The resin jointer 1 has a shape that allows it to be easily wedged in, and the presser claw 6 is difficult to come off when the head is retreated and pulled out. It has the function of preventing an appropriate amount of pressure from being applied to the presser claw 6. In this embodiment, three pairs of presser claws 6 are arranged in the circumferential direction of the pipe, and each pair is attached at an angle of 120° toward the center of the pipe.
When the entire head reaches its forward limit, the three pairs of presser claws 6 are sequentially advanced toward the center by the presser cylinder 11 and grip the jointer 1. As shown in Fig. 2, this operation is performed by first pushing the jointer 1 from one direction with a pair of presser claws 6, slightly tilting the jointer 1 that is in close contact with the inner surface of the bent pipe, and then pressing the other presser claws. 6 will move forward and grab it. If the three pairs move forward and grab at the same time, the jointer 1 will be pulled out while remaining in close contact with the inner surface of the pipe, so the pressing force and pulling force will be large, and especially if the pressing force is large, the jointer 1 will be deformed, ensuring a reliable pulling operation. becomes impossible.

The jointer 1 can be pulled out by retracting the head when the above gripping operation is completed.

The removed jointer 1 is held by the presser claw 6.
When the head is held and the head reaches its backward limit, the presser cylinder 11 opens the presser claws 6, and at the same time the outer sleeve 4 is pushed out by the spring 5, detaches from the inner sleeve, falls, and is stored in a bucket installed at the bottom. By continuously performing the above operations, it becomes possible to automatically perform the jointer removal work. In addition, changes in pipe diameter can be accommodated by replacing the inner sleeve 2 and outer sleeve 4.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but may be modified in various ways without departing from the gist of the present invention.

(Effects of the present invention) By installing the jointer removal device of the present invention, jointer removal work can be performed continuously and unattended.

[Brief explanation of the drawing]

Figures 1A and B are explanatory diagrams showing the device of the present invention, Figures 2A and B are explanatory diagrams showing the state in which the jointer is grasped and pulled out, and Figures 3A, B, C, and D are the steps of pipe outer surface coating work. FIG. 1...Jyointer, 2...Inner sleeve, 3...Shaft, 4...Outer sleeve,
5... Spring, 6... Presser claw, 7... Bolt, 8...
...Claw holder, 9...Spring, 10...Tip metal fitting,
11... Presser cylinder, 12... Pipe clamp device, 13... Pipe.

Claims (1)

[Scope of utility model registration request] The inner sleeve that goes inside the jointer inserted into the inner surface of the pipe end holds the jointer end face, and the outer sleeve that slides in the pipe axis direction with a spring is arranged concentrically in the pipe axis direction and grips the jointer on the outside surface of the pipe. It is characterized by a plurality of external clamp devices arranged in the outer circumferential direction, each consisting of a presser claw for pulling out, a claw holder that supports this claw with a spring, and a presser cylinder that moves the claw holder from the outer circumference of the tube perpendicular to the tube axis. Pipe joint removal device.