JPH08156090A - Tube end receiving port processing method for synthetic resin tube and clamper - Google Patents

Abstract

PURPOSE: To control the holding force so that an excess holding force is not applied to a synthetic resin tube. CONSTITUTION: A method for processing the end receiving port of a synthetic resin tube 2 comprises the steps of holding the tube 2 by a holding means 1, heating the one end to be formed with the port, inserting a die into the one end tube port to form the port at the one end by providing a holding force detecting sensor 3 at the means 1, providing a slip sensor 3 at the holding surface of the tube 2 of the means 1, and increasing the force until the slip at the holding surface of the tube 2 of the means 1 is stopped when the die is inserted into the tube port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a synthetic resin pipe end and a clamp device suitable for use in the method.

[0002]

2. Description of the Related Art Conventionally, for example, JP-A-54-81382.
As described in Japanese Patent Laid-Open Publication No. 2004-242242, a synthetic resin pipe is clamped by a clamping means, one end of which a receiving port is to be formed is heated, and a mold is inserted into the one-end port to form the receiving port at one end. A method of processing a synthetic resin pipe end is known. In such a method for processing the synthetic resin pipe end, it is necessary to apply a compressive force to the synthetic resin pipe in the axial direction and insert the mold into the one end of the synthetic resin pipe. It is necessary to apply a large gripping force so that it will not slip.

[0003]

However, if a large clamping force is applied by the clamping means, the surface of the synthetic resin tube may be damaged or the large diameter synthetic resin tube may be damaged.

The present invention has been made by paying attention to such a problem in the conventional method for processing a synthetic resin pipe end, and its purpose is to solve the above-mentioned problems. Another object of the present invention is to provide a method for processing a synthetic resin pipe end end capable of controlling the clamping force so that an excessive clamping force is not applied to the synthetic resin pipe.

[0005]

In order to achieve the above-mentioned object, the method for processing a synthetic resin pipe end according to the present invention as set forth in claim 1, wherein the synthetic resin pipe is clamped by a clamping means, In a method of processing a synthetic resin pipe end that forms a receiving end by inserting a mold into the pipe opening, a clamping force detection sensor is provided in the clamping means. A slip sensor is provided on the sandwiching surface of the synthetic resin pipe of the means, and when the mold is inserted into the tube mouth at one end, the sandwiching force is increased until the slippage on the sandwiching surface of the synthetic resin pipe of the sandwiching means stops. is there.

According to the second aspect of the present invention, the slip sensor is provided on the sandwiching surface of the sandwiching tool in which one sandwiching tool is provided with the other sandwiching tool that moves toward and away from the other by the operation of the sandwiching tool operating mechanism. Is provided, and a pressure sensor is provided between the other clamping device and the clamping device operating mechanism.

In the present invention, the mold is fixed by inserting the mold into the mouth of one end of the synthetic resin pipe to form the receptacle.
The synthetic resin pipe may be moved to insert the mold into the one end of the synthetic resin pipe, or conversely, the synthetic resin pipe may be fixed,
The mold may be moved to insert the mold into one end of the synthetic resin pipe, or both the mold and the synthetic resin pipe may be moved to insert the mold into the one end of the synthetic resin pipe. It may be either. In the present invention, the material of the synthetic resin pipe is not particularly limited, but a synthetic resin such as a hard vinyl chloride resin, polyethylene, or polypropylene can be preferably used.

Also, the holding means is not particularly limited as long as it can hold the synthetic resin tube, and a vise, a chuck, or the like conventionally known as the holding means can be used, and the number thereof is large. The larger the contact area with the synthetic resin tube, the smaller the clamping force per unit area of the surface of the synthetic resin tube, which is desirable.

Further, in the invention according to claim 2, as the holding member operating mechanism, as long as the holding member can be operated,
The present invention is not particularly limited, and conventionally known gripper operating mechanisms such as an air cylinder, a hydraulic cylinder, a nut and a screw shaft, a rack and a pinion, and the like can be preferably used.

[0010]

In the method of processing a synthetic resin pipe end according to the present invention, the synthetic resin pipe is clamped by the clamping means, and one end of which the receiving port is to be formed is heated so that one end of the synthetic resin pipe is inserted into the pipe mouth. In a method of processing a synthetic resin pipe end that forms a receptacle at one end by inserting a mold, a clamping force detection sensor is provided on the clamping means, and a slip sensor is provided on the clamping surface of the synthetic resin tube of the clamping means. When the mold is inserted into the mouth of the tube, the clamping force is increased until the slippage on the clamping surface of the synthetic resin tube of the clamping means stops, so an excessive clamping force is not applied to the synthetic resin tube. There is no danger of damaging.

In the clamp device of the present invention as defined in claim 2, a slip sensor is provided on the sandwiching surface of the sandwiching tool, in which the other sandwiching tool that is moved toward and away from one sandwiching tool by the operation of the sandwiching tool operating mechanism is provided. Since the pressure sensor is provided between the other clamp and the clamp operating mechanism, the slip sensor detects the slip between the clamp and the synthetic resin pipe and increases the clamp force until the slip stops. As a result, it is possible to prevent an excessive clamping force from being applied to the synthetic resin pipe.

[0012]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a plan view showing a main part of an embodiment of a method for processing a synthetic resin pipe end according to the present invention, and FIG.
It is sectional drawing in the II line. In FIGS. 1 and 2, reference numeral 1 denotes a chuck as a sandwiching means. The chuck 1 is provided with a fixed-side sandwiching tool 11 and a moving-side sandwiching tool 12, and the stationary-side sandwiching tool 11 is erected at one end of a base 13. Bracket 1
4, the moving side holding tool 12 is attached to a piston 17 of an air cylinder 16 attached to an upper end of a bracket 15 standing on the other end of the base 13 via a load cell 18 as a pressure sensor. ing. The air pressure supplied to the air cylinder 16 can be adjusted.

Reference numeral 2 denotes a hard vinyl chloride resin tube having a receiving opening formed at one end. The hard vinyl chloride resin tube 2 is held by both holding tools 11 and 12 of the chuck 1, and a hard vinyl chloride resin is formed in a mold (not shown). The resin pipe 2 is moved to form a receptacle at one end thereof.

Reference numeral 3 denotes a slip sensor provided on the fixed side gripping tool 11, and the fixed side gripping tool 11 is provided by the slip sensor 3.
The relative slip between the hard vinyl chloride resin tube 2 and the hard vinyl chloride resin tube 2 is detected.

An embodiment of the method for processing a synthetic resin pipe end according to the present invention will be described below.
As shown in FIGS. 1 and 2, the hard vinyl chloride resin pipe 2 is placed between the two clamping members 11 and 12, and the air cylinder 16 is operated to clamp the two between the clamping members 11 and 12. The clamping force by the air cylinder 16 at this time is less than a certain set value.

Next, one end of the hard vinyl chloride resin tube 2 is heated and softened, and the chuck 1 is moved toward a mold (not shown) to move the hard vinyl chloride resin tube 2. When one end of the hard vinyl chloride resin tube 2 hits the mold and a slip occurs between the hard vinyl chloride resin tube 2 and the holding tool 11, the slip sensor 3 detects the slip and the holding force of the air cylinder 16 is increased until the slip stops. When the slippage stops, both clamps 11,
The synthetic resin pipe 2 is advanced toward the mold while the synthetic resin pipe 2 is sandwiched by 12, and a receiving port is formed at one end thereof.

[Operation of Embodiment 1] As described above, the slip sensor 3 detects the slip between the holding tool 11 and the synthetic resin pipe 2, and the holding force is applied by the air cylinder 16 until the slip stops. Since the synthetic resin pipe 2 is sandwiched by the sandwiching tools 11 and 12 and the clamping force is not applied to the synthetic resin pipe 2 any more, the synthetic resin pipe 2 is not subjected to an excessive clamping force. 2 is not vulnerable to damage.

The embodiments of the present invention have been described above with reference to the drawings. However, the specific configuration of the present invention is not limited to the embodiments shown in the drawings, and the design can be changed without departing from the gist of the present invention. Etc. are included in the present invention.

For example, in the illustrated embodiment, the slip sensor 3 is provided only on the fixed side holding tool 11, but it may be provided on both holding tools 11 and 12.

[0020]

According to the pipe end receiving method for a synthetic resin pipe of the present invention as set forth in claim 1, since an excessive clamping force is not applied to the synthetic resin pipe, there is no risk of damaging the synthetic resin pipe.

In the clamp device of the present invention as defined in claim 2, the slip sensor detects the slip between the gripping tool and the synthetic resin pipe, and the gripping force is increased until the slip stops, whereby the synthetic resin pipe has an excessive gripping force. Can be prevented.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of an embodiment of a method for processing a synthetic resin pipe end according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 chuck (clamping means) 11 fixed side clamping tool 12 moving side clamping tool 13 bases 14, 15 bracket 16 air cylinder 17 piston 18 pressure sensor 2 hard vinyl chloride resin pipe 3 slip sensor

Claims (2)

[Claims] 1. A pipe of a synthetic resin pipe, wherein a synthetic resin pipe is sandwiched by a sandwiching means, one end of which a receiving port is to be formed is heated, and a mold is inserted into the one end to form a receiving port at one end. In the end socket processing method, a clamping force detection sensor is provided on the clamping means, a slip sensor is provided on the clamping surface of the synthetic resin tube of the clamping means, and the synthetic resin tube of the clamping means is clamped when inserting the mold into the tube mouth. A method for processing an end of a synthetic resin pipe, the method comprising increasing the gripping force until the surface stops sliding. 2. A slip sensor is provided on the sandwiching surface of the sandwiching tool, in which the other sandwiching tool that moves closer to and away from the other sandwiching tool by the operation of the fluid cylinder is provided, and a slip sensor is provided between the other sandwiching tool and the sandwiching mechanism. A clamp device having a pressure sensor provided therebetween.