JPS61132322A - Method of correcting synthetic resin pipe and apparatus therefor - Google Patents

Abstract

PURPOSE:To make it possible to correct readily and quickly a synthetic resin pipe having curling inclination, by supporting and moving the synthetic resin pipe through groups of rollers comprising juxtaposed correcting rollers, while warm air currents, if required, are blown to the synthetic resin pipe to heat the pipe. CONSTITUTION:A pipe 100 is fed from a receiving guide into a path between pairs of upper and lower rollers 1A, 1B constituting correcting rollers 1 and is supported and moved through the correcting rollers 1. During a certain period when the pipe is present in the path, the pipe comes in contact with the warm currents blown from blowing ports 41 of blowers 4 and is heated to be softened. During the passage, the softened synthetic resin pipe 100 can be readily corrected into a straight pipe, is air-cooled and is taken out. Thus, if the synthetic pipe has a small diameter as well as if the synthetic pipe has a large diameter, the synthetic resin pipe can be corrected in situ without requiring much labor.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for straightening synthetic resin pipes, which are used particularly for straightening bends in large-diameter synthetic resin pipes.

(Prior Art) Large-diameter synthetic resin pipes such as conduit pipes for electric wires and drainage pipes for underground drains are transported in a spiral shape, and therefore tend to curl during transportation.

Synthetic resin pipes with curls cannot be used as they are, so conventionally they were straightened manually at the construction site. However, if the synthetic resin pipe has a large diameter (for example, a diameter of 30c!n or more), several people are required to straighten it, so there is a problem that the work requires a lot of time and effort. Ta.

(Problems to be Solved by the Invention) A problem to be solved by the present invention is to enable easy and rapid correction of a synthetic resin pipe that has curled, for example, as described above.

(Another means to solve the problem) A further means to solve the above problem is to move the synthetic fat-busting pipe while supporting it by a roller group consisting of a large number of straightening rollers arranged in parallel, and while it is moving, the above-mentioned The synthetic resin pipe is heated by blowing hot air as necessary, and a pair of roller groups, each consisting of a large number of I and i pressure rollers, are arranged opposite each other at an interval, and the starting line of the roller group is The method is to provide an air outlet for blowing hot air between the straightening rollers arranged in parallel.

(Function) According to the above means, the synthetic resin pipe is heated by hot air and softened while moving between a pair of roller groups, and is then corrected into a predetermined shape, for example, straight, by a straightening roller during subsequent movement. .

(Example) FIG. 1 schematically shows the orthodontic device.

This straightening device has a large number of straightening rollers il+, which are arranged vertically in one row each, forming pairs of upper and lower roller groups (IA), (I
B) and these rollers i+ (IA), (
IB) A moving route for the synthetic resin pipe (100) is secured between the two. In addition, a pair of roller groups (IA),
The correcting rollers (1) constituting the (IB) are connected by a transmission means (21, +2+) such as a chino, a belt, etc., and are rotated at the same speed and in the same direction by the operation of the drive source (3). In this point, for example, only a specific correction roller (1) is driven, and other correction rollers f
1+ is a pair of rollers # (xA), (IB
) may be configured to be rotated in contact with the synthetic resin pipe (100) moving between the pipes (100). On the other hand, a pair of upper and lower roller groups (
At the starting line of IA) and (IB), each correction roller (1
)... are provided between the blowers (4)..., and the air vents (41)... of these blowers (4)...
- Warm air at the desired temperature from synthetic resin T, E Eve (100)
It is designed to be sprayed on.

Further, as shown in FIG. 2, the straightening roller (1) is constricted at the center so that the synthetic resin pipe (100) can be accurately aligned along its movement path.

Furthermore, as is clear from FIG. 8, the correction roller ft)
For example, an elevating mechanism (6) consisting of a rack (51) and a pinion (52) is attached, and the opposing distance between the upper and lower pair of roller groups (IA) and (IB) can be combined by operating the /'i handle (6). The amount can be increased or decreased depending on the outer diameter of the resin pipe (100) (see Fig. 1). In addition, the first
In the figure, (7) is a receiving guide, which facilitates feeding of the synthetic resin pipe (100) into the above-mentioned moving path.

In the above, the synthetic resin pipe (100) is sent from the receiving guide (7) to the moving path between the upper and lower roller groups (IA) and (IB), and the feeding action causes each correction roller ( ]) It is moved while being supported by... Within a certain period of time after being sent into the moving path, the material comes in contact with the warm air blown out from the air outlet (41) of the blower (4) and is heated, thereby softening. The softened synthetic resin pipe (ioo) is easily straightened during subsequent movement, air-cooled, and sent out of the machine. However, when the temperature is high in the summer, blowing warm air is not necessary. Especially in the middle of winter, as synthetic resins generally harden, it is necessary to blow warm air onto them.

Here, if the synthetic resin pipe (100) is a corrugated pipe, the surface irregularities (1
11), if the correction roller (1) has even a slight unevenness, it will not slip and spin.
Like the fourth cause, the corrugated pipe (11
The unevenness (111) that fits into the unevenness (in) on the surface of ,0)
'5r- is provided, there is an advantage that the correction roller ill will not slip at all.

(Effects of the Invention) As described above, according to the present invention, it is possible to easily straighten synthetic resin pipes at the construction site without using much manpower, not only when the synthetic resin pipe has a small diameter, but even when the pipe has a large diameter. become able to.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing how the orthodontic device is used, Fig. 2 is a longitudinal sectional front view of the same, Fig. 3 is a schematic longitudinal lateral view showing the elevating mechanism, and Fig. 4 is the main part of a modified example of the orthodontic device. FIG. fi+...Correcting roller, (IA), (IB)・
... Roller group, (411... Ventilation port, (1
00)...Synthetic resin pipe. Patent applicant Takiron Co., Ltd. 22nd 30th 4th day

Claims (2)

[Claims] (1) The synthetic resin pipe is moved while being supported by a roller group made up of a large number of straightening rollers arranged in parallel, and during the movement, the synthetic resin pipe is heated by being blown with hot air as necessary. How to straighten synthetic resin pipes. (2) A pair of roller groups, each consisting of a large number of straightening rollers arranged side by side, are arranged opposite to each other with an interval, and an air outlet for blowing hot air between the straightening rollers arranged in parallel is provided at the beginning of the roller group. A straightening device for a synthetic resin pipe, characterized in that it is provided with a straightening device for a synthetic resin pipe.