JPS61279509A - Pipe inserter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pipe insertion device for inserting a small diameter pipe with a small diameter difference into a large diameter pipe.

In the following, the large diameter pipe will be described as a cement pipe, and the small diameter pipe as a synthetic resin pipe.

Cement pipes are widely used in construction because they have excellent heat resistance, vibration resistance, and soundproofing properties. However, pipes that use liquids, such as water supply pipes and drain pipes, require water resistance and chemical resistance, so synthetic resin pipes such as vinyl chloride are inserted into these pipes and used as composite pipes.

Furthermore, for convenience of handling, the synthetic resin pipe is slightly longer than the cement pipe.

[Conventional technology]

Conventionally, in order to insert a synthetic resin pipe into a cement pipe, synthetic resin pipes arranged in a coaxial 6 shape are inserted and pressed into the cement pipe held horizontally and fitted.

[Problem that the invention seeks to solve]

However, if the gap between the cement pipe and the synthetic resin pipe is small (e.g. 0.5 to l+n), and the cement pipe and synthetic resin pipe are long (e.g. about 3 m), it takes time to align the two pipes. , the above insertion required skill. Furthermore, if the ends of both tubes were not finished well, the above-mentioned insertion operation was extremely difficult.

[Means for Solving the Problem] The present invention eliminates the above-mentioned drawbacks of conventional devices when inserting a small diameter pipe such as a synthetic resin pipe with a slightly small diameter into a large diameter pipe such as a cement pipe. The gist is: a holding device that holds the large-diameter pipe in a substantially horizontal position; and a holding device that holds the small-diameter pipe substantially coaxially with the large-diameter pipe while pressing and moving it toward the large-diameter pipe. a pressing device; and a guiding device provided between the holding device and the pressing device and guiding the small diameter tube that has been pressed and moved toward the inside of the large diameter tube; A movable stage that can be horizontally moved in the axial direction by a device, and has an enlarged diameter part and a reduced diameter part approximately equal to the outer diameter of the small diameter pipe at both ends, and is provided substantially coaxially with the large diameter pipe. a conical cylindrical guide cylinder provided on the movable table so as to be movable in the vertical direction by a second drive device;
The pipe insertion device has a plurality of thin elastic guide plates provided at the edge of the reduced diameter portion of the guide tube, and the free ends of the guide plates are gathered together in a convergent shape.

[For production]

The extruded small-diameter tube is first aligned approximately coaxially with the axis of the large-diameter tube by the conical surface of the guide cylinder, and the small-diameter tube that is subsequently extruded is aligned with the axis of the large-diameter tube by a thin-walled bullet whose tip has been inserted into the large-diameter tube in advance. Since it is guided by the repellent guide plate, it can be easily inserted even if the difference between the inner diameter of the large diameter tube and the outer diameter of the small diameter tube is small.

〔Example〕

FIGS. 1 and 2 are views showing the main parts of a first embodiment of the present invention, and FIG. 3 is an overall view of the apparatus of the present invention.

In FIG. 3, a cement pipe 1 is placed horizontally on a V-block 2 and is pressed down with an air cylinder 3 from above. The pressure of the air cylinder 3 is increased when the synthetic resin pipe 4 is inserted into the cement pipe l.
It is sufficient that the cement tube 1 does not move in the axial direction.
Press lightly to avoid damaging it. On the other hand, the synthetic resin pipe 4 to be inserted into the cement pipe 1 is placed horizontally on a plurality of grooved idler rollers 5, and its axis is substantially aligned with the axis of the cement pipe 1 due to the grooves of the idler rollers 5. . Synthetic resin pipe 4
A bushing transfer device 6 consisting of a chain conveyor or the like is arranged above the bushings 7 to move the bushings 7 placed behind the synthetic resin pipe 4 (to the right in FIG. 3) forward.

A guide device 8 for guiding the synthetic resin pipe 4 toward the inside of the cement pipe 1 is provided between the pressing air cylinder 3 and the bushing 7. The guide bag W8 is moved vertically onto the movable base 11 by a movable base 11 that can be horizontally movable in the axial direction on a stationary base 9 by a first drive device 10 such as an air cylinder, and a second drive device 12. and a vertically movable conical guide cylinder 13 (Figs. 1 and 2).

The guide tube 13 is a cement pipe 1 placed on the V block 2.
The second drive device 12 is substantially coaxial with the axis of
The axis height can be adjusted by Guide tube 13
has an enlarged diameter portion 14 and a reduced diameter portion 15 slightly larger than the outer diameter of the synthetic resin tube 4 at its rear end.

At the edge of the reduced diameter portion 15 of the guide tube 13, a plurality of thin (0.05 to 0.5 m thick) thin elastic guide plates made of a material such as spring steel are arranged at equal intervals in the circumferential direction. 16 extends toward the cement pipe 1. The elastic guide plate 16 is formed so that its free ends are convergently gathered.

In operation, the first and second drive devices 10 are operated to substantially align the guide tube 13 with the axis of the cement tube 1, and also move the gathering part of the tip of the elastic guide plate 16 away from the end of the cement tube 1. Bring it to the position where about 30 Tsuruuchi Yoshi entered. In this case, alignment of the axes mentioned above does not require precision.

When the synthetic resin tube 4 is advanced by the pusher 7, the front part of the synthetic resin tube 4 is first aligned with the approximate axis position by the tapered surface on the inner surface of the guide tube 13, and then the inner tapered surface of the elastic guide plate 16 is pushed out. The free end of the elastic guide plate 16 comes into contact with the inner peripheral surface of the cement tube 1. Therefore, the elastic guide plate 16 acts like a shoe horn to accurately guide the synthetic resin tube 4 from the guide tube 13 into the cement tube 1. Synthetic resin pipe 4
When the guide tube 13 is retreated when the elastic guide plate 16 is fully inserted into the cement tube 1, the elastic guide plate 16 separates from the synthetic resin tube 4 and returns to its original shape due to its own elasticity.

FIGS. 4 and 5 are views showing the main parts of another embodiment of the present invention. In this embodiment, a backup plate 17 is attached to each elastic guide plate 16 to increase the stiffness of the guide plate. Further, the base end of the backup plate 17 is attached to one side of an L-shaped hinge lever 18 fixed to the reduced diameter portion 15 of the guide tube 13.

The other end of the hinge lever 18 is connected to the enlarged diameter portion 14 via a compression spring 19. In this embodiment, the free end of the resilient guide plate 16 converges due to the biasing force of the compression spring I9. Therefore, when used repeatedly, there is an advantage that the elastic guide plate 16 is less fatigued than the previous embodiment.

In addition, if there is a significant size change in the cement pipe or synthetic resin pipe during actual operation, the guide cylinder and guide plate will be replaced accordingly.

〔Effect of the invention〕

The present invention is configured as described above, and because the alignment with the cement pipe is performed in two steps: rough alignment using a conical guide tube and precise alignment using a thin guide plate, it is possible to match a cement pipe with a large diameter pipe with an extremely small diameter difference. Insertion and fitting into small diameter pipes can be easily carried out using a simple device.

[Brief explanation of the drawing]

1 and 2 are diagrams showing the main parts of a first embodiment of the present invention, of which FIG. 1 shows a state before inserting a small diameter pipe into a large diameter pipe, and FIG. 2 shows a state during insertion. FIG. 3 is a schematic view showing the entire apparatus of the present invention, and FIGS. 4 and 5 are drawings similar to FIGS. 1 and 2, showing essential parts of the second embodiment. ■... Large diameter pipe (cement pipe) 3... Holding device, 4... Small diameter pipe (synthetic resin pipe) 7... Pressing device, 8... Guide device, 10... First Drive device, 11... Moving table, 12... Second drive device, 13... Guide tube, 14... Expanded diameter part, 15... Reduced diameter part, 16... Thin elastic repellent gender guide plate, 18... pivot member, 19... compression spring.

Claims (1)

[Claims] 1. A pipe insertion device for inserting into a large diameter pipe a small diameter pipe having an outer diameter slightly smaller than the inner diameter of the large diameter pipe, wherein the large diameter pipe (1) is held substantially horizontally. Holding device (3)
and a pressing device (7) for holding the small diameter pipe (4) substantially coaxially with the large diameter pipe while pressing and moving it toward the large diameter pipe.
), and a guide device (8) provided between the holding device (3) and the pressing device (7) and guiding the small diameter pipe that has been pressed and moved toward the inside of the large diameter pipe, The guide device includes a movable stage (11) that can be horizontally moved in the axial direction by a first drive device (10), an enlarged diameter portion (14) at both ends, and a diameter reduced portion approximately equal to the outer diameter of the small diameter tube (4). (15), and is provided substantially coaxially with the large diameter pipe (1), and is provided so as to be movable in the vertical direction on the movable table (11) by a second drive device (12). A conical guide tube (
13) and a plurality of thin elastic guide plates (16) provided at the edges of the reduced diameter portion (15) of the guide tube, the free ends of each of the guide plates being assembled in a convergent shape. Pipe insertion device. 2. The pipe insertion device according to claim 1, wherein the guide plate (16) is fixed to the reduced diameter portion (15). 3. Claims in which the guide plate (16) is pivotally attached to the edge of the reduced diameter part (15) and a compression spring (19) is provided between the pivot member (18) and the enlarged diameter part (14). The pipe insertion device according to item 1.