JPS6331949Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention includes an immovable vice; a pinion that engages with a rack cut into the rail, and is pushed through a spring by a pressing member that moves on the rail by rotating the pinion. In a resin pipe end face welding machine comprising a movable vise that moves close to the stationary vise, each vise is provided with a welding pressure setting that compresses the spring by pressing the spring against the movable vise with a pressing member. The pressure setting scale and pointer in the linear direction allow for clear display.

A butt welding machine for thermoplastic resin pipe end faces having the above-mentioned configuration is known, but it heats one end face of the resin pipe gripped by a stationary vise and the other end face of the resin pipe gripped by a movable vise to a welding temperature. , the pressing member is moved by the rotating operation of the pinion, and the end face of the resin pipe that is gripped by the movable vise is pressed against the end face of the resin pipe that is gripped by the stationary vise via the spring, and welding is performed. The welding pressure must be set by adjusting the amount of compression of the spring depending on the material, diameter, etc. If the welding pressure is excessive, the welded end face will be crushed and bulge on both the inside and outside, so it is especially difficult to use tap water. When passing a liquid such as, the inner surface bulges and deposits residue such as water scale, and if the welding pressure is insufficient, the welding force is weak, causing liquid leakage or breakage from the welded part. However, conventional welding methods have the disadvantage that it is difficult to monitor the relative movement of the pointers and perform welding without unevenness because they do not have scales or pointers in a straight line that serve as a guide for performing even welding. The present invention aims to eliminate such drawbacks.

A preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 in the figure is a removable machine stand, and at both ends,
Parallel round rod rails 4, 4 are supported by the leg protrusions 2, 2, 3, 3, one vice 5 is attached to a support piece 6 fitted to the rails 4, 4, and the support piece 6 is attached to the leg protrusion. 2, 2 and makes this a stationary vise. The other vise 7 is movable and is attached to a support piece 8 fitted to the rails 4, 4, so as to correspond to the stationary vise 5 described above. The support piece 8 is in the shape of a pipe and is movably fitted into the rails 4, 4. A pressing member 9 is fitted into the rear part of the movable vise 7 to be freely movable on the rails 4, 4. The pressing member 9 has a handle 10.
The rack 12 has a built-in pinion 11 which is rotated by the rack, and the pinion 11 is carved into one rail 4
A set screw 13 that is engaged with the two rails and joined to the outer circumferential surface of one of the rails is screwed from the top surface.
Between the support piece 8 of the movable vise 7 and the pressing member 9 are coil-shaped springs 1 loosely fitted to the rails 4, 4, respectively.
4 and 14 are inserted.

The support piece 6 has a support shaft 15 parallel to the rails 4, 4.
A movable bracket 16 on which a double-sided cutting machine 17 and a drive motor 18 are mounted, which intervenes between the stationary vise 5 and the movable vise 7 and causes retraction as shown in FIGS. 1 and 3, is fixed on the support shaft. do. Support shaft 1
5 is fitted with a push screw 13 for pushing the movable bracket 16 in the direction of the movable vise 7 (the above is publicly known).

In this embodiment, a pressure setting scale 21 is provided on the front side of the support piece 8 in FIG. to be fixed. The pressure setting scale 21 may be provided on the pressing member 9 and the pointer 22 may be provided on the support piece 8.

In this embodiment, thermoplastic synthetic resin pipes a and b are sandwiched between a stationary vise 5 and a movable vise 7, respectively, and a double-sided cutting machine 17 is inserted between the pipes a and b to rotate the handle 10. By rotating the pinion 11, pressure is applied to pipe b and the welding surface is scraped, and a double-sided heating device (not shown) is inserted between the end faces of both pipes a and b to heat both end faces. After heating to a degree suitable for welding, remove the heating device,
The pressing member 9 is rotated by the handle 10 and the pinion 11.
After moving rapidly in the direction of the stationary vise 5, interlocking the movable vise 7 with the spring 14 and pressing the end surface of the pipe b against the end surface of the pipe a, turning the handle 10 a little further causes the movable vise 7 to move. Not moving,
Only the pressing member 9 moves in the direction of compressing the spring 14, and at this time the pointer 22 moves relatively on the pressure setting scale 21. Therefore, when the pressure setting scale 21 indicated by the pointer 22 indicates the target setting pressure, the rotation of the handle 10 is stopped or the set screw 13 is pressed against one rail 4 to fix it.

At this time, the spring 14 is compressed, and the movable vice 7
The end face of pipe b is joined to the end face of pipe a through a predetermined pressure, and molecular fusion occurs between the end faces, resulting in welding.

The present invention has the configuration as exemplified above.
The welding pressure, which is set in proportion to the amount of compression of Since it can be confirmed visually, even an unskilled person can confirm the amount of movement of the movable vise based on the relative movement of the pointer 22.

[Brief explanation of the drawing]

The accompanying drawings show one implementation of the present invention; FIG. 1 is a plan view, FIG. 2 is a partially cutaway front view, and FIG. 3 is a side view. 1...Movable machine stand, 4...Rail, 5...Imovable vise, 6...Support piece, 7...Movable vise, 8...
...Support piece, 9...Press member, 11...Pinion,
12... Rack, 14... Spring, 21... Pressure setting scale, 22... Pointer.

Claims (1)

[Claims for Utility Model Registration] An immovable vise; it has a built-in pinion that engages with a rack cut into a rail, and is pushed through a spring by a pressing member that moves on the rail by the rotation of the pinion, In a resin pipe end face welding machine equipped with a movable vise that moves close to the vise, one of the movable vise and the pressing member is provided with a pressure setting scale in the moving direction of the movable vise, and one of the movable vices is provided with a pressure setting scale along the pressure setting scale. A butt welding machine for the end face of a thermoplastic resin pipe, characterized by a fixed pointer that moves in a straight line and displays the welding pressure.