JP3269924B2 - Extrusion molding machine for synthetic resin pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to an extruded synthetic resin pipe take-up machine for taking out a synthetic resin pipe extruded while being spirally rotated while a spiral rib is formed on an inner surface by extrusion.

[0002]

2. Description of the Related Art By using as a drainage vertical pipe of a building,
As a method of continuously producing a synthetic resin tube with an internal spiral rib that can improve drainage capacity, after continuously extruding a parison having a spiral rib formed on the internal surface while spirally rotating it from an extrusion die, The extruded parison was passed through a forming device having a forming means and a cooling means rotatable in the circumferential direction, and was cooled and solidified while being shaped into a pipe having a desired outer diameter.Furthermore, the parison was tuned to the extrusion speed and rotation speed of the parison. A method of drawing the pipe at a speed has been proposed (Japanese Patent Laid-Open No. Hei 6-14387).

[0003]

However, there has not been a take-off machine that can successfully take up a tube at a speed synchronized with the extrusion speed and the rotation speed of the parison. That is, a take-up machine conventionally used to take a synthetic resin tube not provided with a spiral rib has a rotating body such as a plurality of caterpillars, which is formed of a synthetic resin tube continuously extruded from a molding machine. At a constant pitch in the circumferential direction, and fixedly supported by a frame fixed to the floor so as to abut on the peripheral surface of the synthetic resin pipe, and a drive of a drive motor provided with a rotating body provided in the frame. The rotational force obtained by the force pulls in the tube axis direction of the synthetic resin tube. That is, it can be pulled out only linearly in the tube axis direction of the synthetic resin tube.

Accordingly, the inventors of the present invention have developed a method in which the frame is rotated around the synthetic resin tube while rotating the rotating body of the conventional take-up machine, and the speed adjusted to the extrusion speed and the rotation speed of the parison. When the frame is rotated, the electric wire that supplies power to the drive motor that drives the rotating body is connected to an external power source, so the pipe rotates with the rotation of the frame. There is a problem that the electric wire is wound and damaged.

On the other hand, if a battery for supplying power to the drive motors of the respective rotating bodies is provided inside the frame as in the take-off machine disclosed in Japanese Patent Publication No. 49-42670, the above problem can be solved. There is a problem in terms of maintenance such as battery replacement and an increase in the size of the apparatus. In view of such circumstances, an object of the present invention is to provide an extruded synthetic resin pipe take-off machine that is free from problems such as damage to electric wires, is easy to maintain, and can be reduced in size.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, an extruded synthetic resin pipe pulling machine according to the present invention is driven by contacting the peripheral surface of a synthetic resin pipe extruded from a molding machine. It has a plurality of rotating bodies that are pulled in the tube axis direction of the synthetic resin pipe by the rotational force obtained by the force, and a frame body that supports these rotating bodies so as to be arranged at a uniform pitch in the circumferential direction of the synthetic resin pipe. Then, in a take-up machine for an extruded synthetic resin pipe adapted to be driven to rotate in the circumferential direction of the synthetic resin pipe while the frame supports the rotary body, each rotary body transmits a driving force to its rotating shaft. Each with a power transmission shaft,
The synthetic resin pipe is arranged to surround the synthetic resin pipe from the outside, and is independent of the frame in the circumferential direction of the synthetic resin pipe around the pipe axis of the synthetic resin pipe by a drive motor provided outside the frame. A rotary driving body that rotates is provided adjacent to the frame, and each driving force transmission shaft is connected to the rotary driving body via a driving force transmitting unit.

In the above configuration, the driving force transmitting means is not particularly limited as long as the driving force can be transmitted, and examples thereof include a combination of a pulley and a belt, a combination of a sprocket and a chain, and a combination of a gear and a gear. Can be

[0008]

According to the above construction, the frame is rotated about the central axis of the synthetic resin pipe by the drive motor provided outside the frame. Then, with the rotation of the frame, each rotating body also rotates about the central axis of the synthetic resin pipe. In addition, since the rotating body is in contact with the synthetic resin tube, the synthetic resin tube rotates in the circumferential direction with the rotation of the frame.

Further, each rotating body is connected to a rotating driving body whose rotating shaft rotates independently of the frame via a driving force transmitting shaft. Therefore, when the rotary driving body is rotationally driven by the driving motor provided outside the frame, the driving force is strictly transmitted to the rotating shaft via the driving force transmitting shaft, and the rotating body is moved in the direction of pulling the synthetic resin tube in the tube axis direction. Rotates. That is, the synthetic resin pipe is drawn in the pipe axis direction while rotating in the circumferential direction.

[0010] Further, the driving force of a driving motor provided outside the frame is transmitted to a rotary driving body that rotates independently of the frame, and the rotary driving body rotates to the rotating body via a driving force transmission shaft. Since the driving force is transmitted, the electric wires are not twisted and damaged, and there is no need to provide a driving motor or a battery in the frame.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments. FIG. 1 shows one embodiment of a pulling machine for an extruded synthetic resin pipe according to the present invention (hereinafter, referred to simply as "hauling machine"), and FIG. 2 shows a cross section viewed from the side.

As shown in FIGS. 1 and 2, the take-off machine 1 includes a casing 2, a first motor 3, a second motor 4, a frame (rotating drum) 5, and four caterpillars 6 as rotating bodies. ing. The frame body 5 includes disk-shaped members 51, 51 at the front and rear ends, respectively. Reinforcement frames 52, 52 are attached to the disk-shaped members 51, 51 in a cross shape, respectively, and the front and rear reinforcement frames 52, 52 are provided. Are connected via four horizontal frames (only two appear in the figure) 53 at the tip of the cross.

Further, the frame body 5 is formed of the front and rear disc-shaped members 5.
Rollers 21 and 51 provided in the casing 2
1, 2, 22 make it rotatable inside the casing 2 about the central axis of the disk-shaped member 51. Also,
The disc-shaped members 51, 51 are provided with holes 54, 54 through which a synthetic resin pipe P extruded by an extruder can be inserted, and a disc arranged on the extruder (not shown) side. As shown in FIG. 3, the tubular member 55 extends from the tubular member 51 so as to surround the hole 54.

As shown in FIG. 2, a tubular rotary driving body 56 is rotatably supported on the cylindrical portion 55 via bearings 57, 57 around the cylindrical portion 55. That is,
The rotation driving body 56 is configured to rotate independently of the frame 5 and is arranged so as to surround the synthetic resin pipe P. A sprocket 58 is provided at the tip of the cylindrical portion 55.

As shown in FIGS. 1 and 2, the sprocket 58 is connected to a sprocket 31 provided on the rotating shaft of the first motor 3 via a chain 32. That is, the frame 5 is driven by the driving force of the first motor 3.
It is designed to rotate around the central axis. On the other hand, a sprocket 71 is provided on the extruder side of the rotary driving body 56, and a gear 81 is provided on the other side.

The sprocket 71 is connected via a chain 73 to a sprocket 72 provided on the rotation shaft of the second motor 4. That is, the driving force of the second motor 4 is applied to the sprocket 72, the chain 73,
It is transmitted to the rotary driving body 56 via the sprocket 71,
The rotation driving body 56 can be rotated around the cylindrical portion 55.

On the other hand, as shown in FIG. 2, each of the caterpillars 6 rotates while supporting the synthetic resin tubes supported and taken by the respective horizontal frames 53 of the frame body 5 at four points.
The synthetic resin tube can be pulled backward along the tube axis. That is, each caterpillar 6
As shown in FIGS. 2 and 3, the drive rotation shaft 61 penetrates the disk-shaped member 51 and is rotatably supported by the reinforcing frame 52, the sprocket 62, the chain 63, the sprocket 64, The connection shaft 65, the worm gear 66, and the worm gear 91 provided at the tip of the driving force transmission shaft 9 are connected.

The driving force transmission shaft 9 is connected to a gear 81 via a gear 83 rotatably supported by the disk-shaped member 51 with a gear 82 provided at the other end.
Accordingly, the driving force of the second motor 4 transmitted to the rotary driving body 56 via the sprocket 72, the chain 73, and the sprocket 71 is transmitted to the driving force transmission shaft 9 via the gears 81, 83, 82, and further, the drive The worm gear 91, the worm gear 66, the connecting shaft 65,
The sprocket 64, the chain 63, and the sprocket 62 are transmitted to the drive rotating shaft 61 of the caterpillar 6 in this order, so that the caterpillar 6 rotates in a direction in which the synthetic resin pipe P is pulled.

Since the take-off machine 1 is configured as described above, if the frame 5 is rotated by the driving force of the first motor 3, the caterpillar 6 and the center axis of the frame 5 are moved together with the frame 5. Rotate around the center. In addition, the caterpillar 6 itself rotates in a direction in which the driving rotation shaft 61 rotates by the driving force of the second motor 4 to take the synthetic resin pipe P. Therefore, the synthetic resin pipe P can be pulled out while being spirally rotated about the pipe axis.

In addition, since the second motor 4 for rotating the caterpillar 6 is provided outside the frame 5, the power supply wire and the like of the second motor 4 are not damaged by the rotation of the frame 5. Further, since no drive motor for rotating the caterpillar 6 is provided in the frame 5, the size of the frame 5 and the casing can be reduced, and the entire apparatus can be reduced in size. Further, since both the first motor 3 and the second motor 4 are provided outside the frame 5, maintenance of the motors 3 and 4 is also easy.

Of course, the take-off machine 1 is provided with the first motor 3
Is stopped, it can also be used for taking in a synthetic resin tube without a normal inner spiral rib. The take-off machine according to the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the rotation of the frame and the rotation of the track are performed by separate motors. However, the frame and the track may be rotated by the driving force of one motor. Absent.

Although the transmission is not provided in the above embodiment, a continuously variable transmission or the like may be provided so that the ratio of the rotational speed can be freely changed. Further, in the above-described embodiment, the rotary driving body is rotatably supported by the cylindrical body provided on the frame body. However, a support body is provided on the front or rear of the frame body separately from the frame body. Alternatively, the rotary drive may be rotatably supported.

[0023]

Since the take-off device according to the present invention is constructed as described above, the accident that the power supply wire and the like to the drive motor is damaged by the rotation of the frame is eliminated, and the maintenance of the drive motor is prevented. Becomes easier. In addition, since it is not necessary to provide a battery or the like in addition to the drive motor in the frame, the entire apparatus can be downsized.

Of course, it is possible to accurately draw in the axial direction of the pipe while rotating it in the circumferential direction of the pipe at a predetermined speed continuously extruded by the extruder.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a take-up machine according to the present invention.

FIG. 2 is a cross-sectional view of the take-off machine of FIG. 1 as viewed from the side.

FIG. 3 is a perspective view illustrating a drive mechanism of a caterpillar of the take-off machine shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Take-off machine 3 1st motor (drive motor) 4 2nd motor (drive motor) 5 Frame 6 Caterpillar (rotary body) 9 Driving force transmission shaft 56 Rotary drive body

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-309718 (JP, A) JP-A-5-293873 (JP, A) JP-B-49-42670 (JP, B1) (58) Survey Field (Int. Cl. ⁷ , DB name) B29C 47/00-47/96

Claims (1)

(57) [Claims] 1. A plurality of rotating bodies which come into contact with a peripheral surface of a synthetic resin pipe extruded from a molding machine and are pulled in a tube axis direction of the synthetic resin pipe by a rotating force obtained by a driving force, and these rotating bodies. And a frame for supporting the rotating body in a circumferential direction of the synthetic resin pipe while the frame supports the rotating body. In the extrusion-molded synthetic resin pipe take-off machine, each rotating body is provided with a driving force transmission shaft for transmitting a driving force to its rotating shaft, and is arranged so as to surround the synthetic resin tube from the outside, and is provided outside the frame body. A rotation drive body that rotates independently of the frame in the circumferential direction of the synthetic resin pipe around the pipe axis of the synthetic resin pipe by the provided drive motor is provided adjacent to the frame, Each driving force transmission shaft is connected via a driving force transmission unit. Extruded plastic pipe winder, characterized in that it is connected to the rotary drive member Te.