JPH0229495B2 - JUSHIKANNOSEIZOSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a resin pipe manufacturing apparatus that is preferably used mainly for manufacturing large diameter resin pipes.

(Prior Art) Generally, this type of resin pipe manufacturing apparatus has a plurality of molding rotating shafts arranged on a virtual cylinder, and one end of the molding rotating shafts is cantilevered on a base. With,
Each rotating shaft is interlocked with a drive device, and the forming rotating shaft is slightly inclined with respect to the axis of the virtual cylinder. During tube forming, the belt-shaped material supplied from the die of the extrusion forming device is It is wrapped so as to span the upper part of each molding rotary shaft, and its one side edge is polymerized and bonded, and in this state, each molding rotary shaft is simultaneously driven by a drive device, whereby the resin is sequentially rolled. A tube is formed and sent out from the free end side of the forming rotating shaft.

(Problems to be Solved by the Invention) However, in the case of the resin pipe manufacturing apparatus having the above structure, the diameter of the resin pipe to be molded cannot be changed, and each molding rotating shaft is rotated during molding. In other words, in this type of large-diameter pipe, a large load is applied to the forming rotating shaft.However, if the forming rotating shaft is supported in a cantilevered manner on the base as described above, There is a problem in that the support for each forming rotating shaft is deformed because it cannot resist the load, and reliable tube forming cannot be performed.

(Means for Solving the Problems) Therefore, the present invention was devised to solve the above problems, and includes a plurality of rotary shafts for molding on a virtual cylinder centered on a support shaft supported on a base. At the same time, each is connected to the drive device,
The molding rotary shafts are configured to drive all at once in the same direction, and each molding rotary shaft is supported on the support shaft by at least two support rods facing each other at a predetermined interval. It is characterized by being supported so that it can be moved in any direction.

(Function) According to the above configuration, each of the forming rotating shafts is supported on both sides, so that each forming rotating shaft can sufficiently resist the large load that is applied during tube forming, and will not be inadvertently displaced. The pipe forming process can be carried out reliably without any problems, and by moving the supporting position of the support rod on the support shaft in the axial direction of the support shaft, or by swinging the support rod on the support shaft. The diameter of the pipe to be molded can be freely changed by moving each of the molding rotating shafts in the radial direction.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

A support shaft 2 is fixedly supported on a base generally indicated by the reference numeral 1 in the figure, and a plurality of molding rotation shafts 3 are arranged on a virtual cylinder centered on this support shaft 2. has been done.

The molding rotating shaft 3 is a long shaft 3 having a bearing 4.
a, and a short shaft 3b with a bearing 5,
The long shaft 3a is connected to the shortening 3b via a universal joint 6, and the long shaft 3a is slightly bent with respect to the shortening 3b by the universal joint 6, so that the long shaft 3a is connected to the support shaft 2.
It's supposed to be tilted a little bit.

On the other hand, the cylindrical body 7 and the short cylinder 8 are fitted onto the support shaft 2 so as to be movable in the axial direction, and the outer periphery of both ends of the cylindrical body 7 is
A plurality of U-shaped receivers 9...10...11... are fixed on the outer periphery of the short tube 8, respectively, and each of the receivers 9...10
...11... two pairs of support rods 12...13...14...
One end of the support rod 12 is pivotably connected to the bearing 4, and the other end of one of the support rods 12 is pivotally connected to the bearing 4, and each of the other ends of the other support rods 13...14 is connected to the bearing 5. The molding rotating shaft 3... is pivotally connected to the supporting shaft 2.
It is supported so as to be movable in the radial direction. Reference numeral 15 in the figure indicates a radial elongated hole provided in the cover plate portion 1a constituting the base 1. The bearing 5 is inserted into the elongated hole 15, and the diameter of the molding rotation shaft 3... It serves as a guide during direction movement.

Furthermore, operating shafts 16, 16 are arranged on both sides of the support shaft 2 and extend in the same direction as the axis of the support shaft 2, and are rotatably supported by the base 1. The operating shafts 16, 16 have screw grooves in opposite directions formed on both sides of the cylinder 7 and the short cylinder 8 as a boundary, and a nut-like receiving member is screwed into each screw groove. 17 and 18 are fixed to the cylinder body 7 and the short cylinder 8, and by rotating the operating shafts 16 and 16, the cylinder body 7 and the short cylinder 8 are connected via the nut-like receiving members 17 and 18. are configured to move toward or away from each other in the axial direction. The operating shaft 1
The mechanism for rotating the shafts 6, 16 may have any structure, but for example, as shown in the figure, the operating shafts 16, 16 may be made to protrude outward from the base 1, while the protrusion of the support shaft 2 may be a small gear 20 that supports the operating gear 19 and meshes with this gear 19;
20 are inserted and fixed into the protruding parts of the operating shafts 16, 16, and the operating shafts 16, 16 are configured to be rotated in the same direction via the gears 20, 20 by the rotation operation of the gear 19. do it.

Further, the molding rotating shafts 3 are interlocked and connected to a drive device 21, that is, each short shaft 3b of the molding rotating shafts 3 is connected to a telescopic connecting shaft 23 via a universal joint 22. Connecting shaft 23 to universal joint 24
is connected to the driven shaft 25 via the
The small gears 26 inserted and fixed into the base 1 are engaged with the large gear 27 supported on the base 1, and the large gear 27 is interlocked with the output shaft of the drive device 21, so that the power from the drive device 21 is connected to the output shaft of the drive device 21. is transmitted to each molding rotating shaft 3 so that each molding rotating shaft 3 is driven simultaneously.

In the above configuration, the die 2 of the extrusion molding device 28
The semi-molten strip material a supplied from 9 is wound so as to span the upper part of each molding rotating shaft 3, and its one side edge is polymerized and bonded, and in this state, each molding rotating shaft 3... are simultaneously driven by the power from the drive device 21, the strip-shaped material a is formed into a tubular shape and is sequentially fed out from the side opposite to the base 1. In addition, if the pipe diameter is large, the strip material a may harden and be unable to be bonded by the time it reaches the overlapping position, but in such a case, it is possible to reheat the strip material a with a heating device before the overlapping position. good.

When changing the pipe diameter of the resin pipe to be molded, the operating gear 19 is used to change the operating shafts 16 and 1.
6 is rotated to move the cylinder body 7 and the short cylinder 8 in a direction toward or away from each other,
As a result, each molding rotating shaft 3 moves radially outward or inward, and the diameter of the resin tube molded by each molding rotating shaft 3 is changed as appropriate.

In addition, in the above-mentioned embodiments of the present invention, the support rod 12...
By changing the axial position of the support rods 13...14... on the support shaft 2, the molding rotating shaft 3... was moved in the longitudinal direction.
The molding rotation shaft 3 may be moved in the radial direction by swinging the support rods 12...13...14 while the mounting positions of the molding shafts 14 on the support shaft 2 are fixed. . In this case, the short shaft 3a side of the molding rotating shaft 3 is formed to be expandable, or an expandable binding shaft is interposed between the molding rotating shaft 3 and the universal joint 22. There is a need to.

In addition, the support rods 12 are made slightly longer or shorter than the support rods 13, 14, etc., so that the molded resin pipe can be reliably fed out.
If the support rod 12 is very long, the outer diameter of the molding rotating shaft 3 on this side will be large, and it will be possible to provide reliable feeding when molding a resin tube using a strip-shaped material that hardens quickly. If the ... is too short, the outer diameter of the molding rotating shaft 3 on this side will be small, and when molding a resin tube using a strip material that shrinks during curing, it will be possible to smoothly feed it out without giving any resistance. You get it.

Further, the present invention replaces the receiver 9 in the embodiment with the cylindrical body 7.
The cylinder body 7 is configured to change its position in the circumferential direction on the
is configured so that it can be divided into two parts and rotated relative to each other,
By making the support rods 12... movable in the circumferential direction relative to the support rods 13..., the support shafts 2 of the molding rotation shafts 3...
The inclination angle may be changed and adjusted.

(Effects of the Invention) As explained above, according to the present invention, each molding rotation shaft supported on a support shaft is supported on both sides by at least two support rods parallel to each other. The rotating shaft is supported extremely reliably, and even large-diameter resin pipes can be accurately and continuously molded. In addition, by changing the axial position of the support rod on the support shaft or by swinging the support rod, the radial movement of each molding rotary shaft can be performed extremely easily. This made it possible to change and adjust the diameter freely and easily.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view thereof, FIG. 2 is a side view thereof, and FIG. 3 is a longitudinal sectional view thereof. DESCRIPTION OF SYMBOLS 1... Base, 2... Support shaft, 3... Rotating shaft for molding, 12, 13, 14... Support rod, 21... Drive device.

Claims (1)

[Claims] 1. A plurality of molding rotation shafts are arranged on a virtual cylinder centered on a support shaft supported on a base, and each molding rotation shaft is connected to a driving device so that each molding rotation shaft is The molding rotary shafts are supported on the support shafts by at least two supporting rods facing each other at a predetermined interval so as to be movable in the radial direction. A resin pipe manufacturing device characterized by: 2. The resin pipe manufacturing apparatus according to claim 1, wherein the radial movement of the molding rotating shaft is performed by swinging each support rod. 3. Manufacturing a resin pipe as set forth in claim 1, characterized in that the radial movement of the molding rotation shaft is performed by moving the support position of each support rod on the support shaft. Device. 4. The resin according to claim 2 or 3, characterized in that, among the support rods, the support rod on the side in the feeding direction of the molded resin pipe can be changed in circumferential position on the support shaft. Pipe manufacturing equipment.