JPS63425Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of a vise that is opposed to each other so that it can be relatively approached, and a heating part that is freely attached to the vise and intervenes between the welded end faces of the resin pipe that is gripped by the vise. The gist of this invention is to install a detection switch that detects the attachment of the heating bracket at the same time the heating bracket is attached to the resin pipe welder equipped with the heating bracket.

The resin pipe welder is used to weld the end faces of thermoplastic resin pipes together to extend the length of the pipe. It is necessary to insert the heating part of the heating bracket on the side, press the pipe ends on both sides of the heating part, and apply heat for a certain period of time. Sometimes, the welded part bulges in the inner and outer diameter directions, resulting in poor welding. The time when heating is required is set by a timer, and the heating start time, that is, the measurement of the time set by the timer, is performed when the pipe Pa,
It starts by sensing pressure on each end face of Pb, but if it is not detected whether a heating bracket is installed before that, it is impossible to sense pressure or start measuring the set time using a timer. become. The present invention is in charge of detecting the attachment of the heating bracket in such a case.

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

1 and 2 show a resin pipe welder 1, in which a support frame 3 is erected at one end of a stand 2, a rail support frame 5 is erected at the other end, and rails 6, 6 are erected. (See the chain line in FIG. 2) The rail support frame 5 has a protrusion 4 on the upper end that protrudes in the direction of a movable vise 18, which will be described later, to constitute an immovable position fixing vise 7. A movable piece 11 that can swing in the direction of the arrow x about the axis 10 of the pillar piece 9 that projects so as to be able to swing in the direction of the arrow z;
A gate-shaped piece 15 that can swing in the direction of the arrow y by a shaft 14 provided in the figure so as to straddle the free end 12 of the movable piece 11 when standing up as shown, and a horizontal part of the gate-shaped piece 15. 16 and said free end 12
A concave arc-shaped gripping groove 8 and a gripping groove 13 with opposite depth directions are provided on the upper end surface of the protrusion 4 and the lower end surface of the movable piece 11.

Reference numeral 18 denotes a movable vise corresponding to the above-mentioned position fixing vise 7, which is integrated with a movable frame 19 slidably mounted on the rails 6, 6, and has a projection piece 20 projecting in the direction of the position fixing vise 7. , a movable piece 21 protruding from the protruding piece and swingably attached to the shaft of a pillar piece similar to the pillar piece 9, and a gate-shaped piece 23 having an equivalent structure to the gate-shaped piece 15 described above; It consists of a tightening screw 25 that is screwed into the horizontal portion 24 of the portal piece 23 and holds the free end 22 of the movable piece 21. Each part of this movable vise 18 is equivalent to the position fixing vise 7, so a part of the explanation will be omitted.

The movable vice 18 is a swinging lever 41 attached to the shaft 42 of the instrument stand 2, and the position fixed vice 7
The end faces of the pipes Pa and Pb are pressed against each other by approaching in the direction of . 43 is a movable vise 1 attached to the connecting part of the rail support frame 5.
This is a case of a spring that applies a spring elasticity of 8.

Each of the movable pieces 11 and 21 of the fixed position vise 7 and the movable vise 18 is provided with supporting seat plates 26 and 26 on the same level on the upper surface to which the heating bracket 28 can be removed and attached, and the heating bracket is attached to the supporting seat plates. Knock pins 27, 27 for positioning are protruded into which the nozzle holes 29 of No. 28 are fitted. heating bracket 28
has a heating section 30 that is inserted between the end faces of thermoplastic resin pipes Pa and Pb that are gripped by the fixed position vise 7 and the movable vise 18, respectively. In addition, resin pipe Pa, Pb
Before heating, each corresponding end face is cut by an end face cutting device (not shown) to prepare it suitable for heating and welding. (Public knowledge) In the above-described exemplary configuration, the present invention operates with the mounting of the heating bracket 28 on the support seat plate 26, the switch actuating member 32 that is pressed against the protrusion 31, and the movement of the actuating member 32. A detection switch 29 is provided on the position fixing vise 7. The switch actuating member 32 has gripping grooves 8 and 1 as shown in FIG.
The upper piece 33 passed through the movable piece 11 and the lower piece 34 passed through the protrusion 4 are separably joined. Upper piece 3
3 is curved so as to extend to the lower surface of the support seat plate 26, the above-mentioned protrusion 31 is attached, and a floating spring 36 is attached to the lower surface. The lower piece 34 has a protrusion 4
A switch actuating cam 35 with a larger diameter is formed at the lower end that protrudes after passing through the guide hole of the switch actuating cam 35, and a floating spring 37 corresponding to the lower piece 34 is provided, and a contact control spring 38 is provided on the side of the switch actuating cam 35. A detection switch 39 is provided in contact with the cam 35.

In the apparatus of the embodiment, when the heating bracket 28 is not mounted on the support seats 26, 26 of the fixed position vise 7 and the movable vise 18, respectively,
Upper piece 33 and lower piece 34 of switch operating member 32
is raised by the floating springs 36 and 37 as shown in FIG. At that time, the contact control spring 38 of the detection switch 39 contacts the conical inclined surface a of the switch actuating cam 35, bringing the contact into one pole.

When the heating bracket 28 is mounted on the support seat plates 26, 26, the protrusion 31 is pushed down, and the switch operating member 32 is lowered against the elasticity of the floating springs 36, 37, and the switch operating cam 35 of the lower piece 34 is pushed down. In order to lower the contact control spring 3 of the detection switch 39
8 contacts the vertical surface b of the switch operating cam 35, causing a switching action that brings the contact into contact with the other pole, and sends out a sensing signal to which the heating bracket 28 is attached.

When the heating bracket 28 is removed from the support seat plates 26 and 26, the switch actuating member 32 is slightly raised together with the protrusion 31 by the floating springs 36 and 37, the contact control spring 38 comes into contact with the slope a again, and the detection switch 39 is activated. The contact is brought into contact with the previous pole to send out a sensing signal that the heating bracket 28 has been removed.

As has been made clear from the above description, the present invention has a protrusion 31 protruding from the mounting surface of the heating bracket 28, so that the switch actuating member 3 is pressed down together with the protrusion 31 when the heating bracket 28 is mounted.
2, the actuating member 32 is connected to the heating bracket 28.
A detection switch 39 is provided that simultaneously sends out a sensing signal when it senses the attachment of the resin pipes 29 to 29. By sending out the signal, a timer circuit is established, and the contact pressure of the ends of the resin pipes Pa and Pb to the heating section 29 is increased. A separate switch that detects the heating time of the end surface can be used to start time measurement at the set timing, so this is an excellent way to automate the resin pipe welder and improve its functionality. have an effect.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present invention, in which FIG. 1 is a side view, FIG. 2 is a back front view of FIG. 1 seen from the left side,
FIG. 3 is an enlarged cutaway front view of the main part. 1→Resin pipe welder, 28→Heating bracket, 32→Switch operating member, 39→Detection switch.

Claims (1)

[Scope of utility model registration request] A resin pipe welder comprising a vise that faces each other so as to be relatively accessible, and a heating bracket that is freely removably attached to the vise and interposes a heating part between the welded end surfaces of the resin pipe gripped by the vise, The vise includes a switch actuating member that has a protrusion that is pressed by a heating bracket mounted thereon, and that moves as the protrusion moves under pressure;
A resin pipe welder comprising: a detection switch that is activated by the movement of the switch actuating member to detect attachment of the heating bracket.