JPH0238385B2 - GOSEIJUSHIPAIPUNOKYOSEIHOHOOYOBISONOSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a synthetic resin pipe straightening method and apparatus 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 underground drainage pipes, are transported in a spiral shape, so they often become curled during transportation. Synthetic resin pipes with curls cannot be used as is, so conventionally, they were straightened manually at the construction site. However, when the synthetic resin pipe has a large diameter (for example, a diameter of 30 cm or more), several people are required to straighten it, which poses a problem in that the work requires a lot of time and effort.

(Problems to be Solved by the Invention) The problem to be solved by the present invention is to enable a synthetic resin pipe with curls to be straightened easily and quickly.

(Means for Solving the Problems) In order to solve the above problems, the straightening method of the present invention provides a movement path of a synthetic resin pipe between a pair of upper and lower roller groups formed by arranging a large number of straightening rollers in parallel. The synthetic resin pipe formed and fed into the movement path is supported by a straightening roller and moved by the feeding action of the straightening roller, and during the movement, the synthetic resin pipe is heated by being blown with hot air to eliminate curling. It is characterized by softening the synthetic resin pipe with the marks on it to make the eyelids straight. In addition, the straightening device of the present invention has a pair of roller groups formed by a large number of straightening rollers arranged in parallel with a constricted center portion, which are vertically spaced apart from each other, and a synthetic resin pipe is inserted between the roller groups. The present invention is characterized in that a straight movement path is formed, and an air outlet for blowing warm air between the straightening rollers arranged in parallel at the beginning of the roller group is provided.

(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 then straightened into a predetermined shape, for example, straightened by the straightening rollers, during subsequent movement. Ru.

(Example) FIG. 1 schematically shows a correction device. This straightening device has a large number of straightening rollers 1 arranged vertically in one row each, and a pair of upper and lower roller groups 1A,
1B, and a moving path for the synthetic resin pipe 100 is secured between these roller groups 1A and 1B. Further, each correction roller 1 constituting a pair of roller groups 1A and 1B is connected by a transmission means 2, 2 such as a chain or a belt, and rotates at a uniform speed and in the same direction by the operation of a drive source 3. It is becoming more and more common. In this respect, for example, only a specific correction roller 1 may be driven, and the other correction rollers 1 may be freely rotated and rotated in contact with the synthetic resin pipe 100 that moves between the pair of roller groups 1A and 1B. . On the other hand, at the beginning of the pair of upper and lower roller groups 1A, 1B, blowers 4 are provided between the respective straightening rollers 1, and warm air at a desired temperature is supplied from the fast air openings 41 of these blowers 4. is sprayed onto the synthetic resin pipe 100.

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 moving path.
Furthermore, as is clear from FIG. 3, the straightening roller 1 is provided with an elevating mechanism 5 consisting of, for example, a rack 51 and a pinion 52, and the opposing distance between the upper and lower roller groups 1A and 1B is adjusted by operating a handle 6. The amount can be increased or decreased depending on the outer diameter of the synthetic resin pipe 100 (see FIG. 1). In addition, the first
In the figure, 7 is a receiving guide, which facilitates feeding the synthetic resin pipe 100 into the above-mentioned moving path.

In the above, the synthetic resin pipe 100 is fed from the receiving guide 7 to the movement path between the upper and lower roller groups 1A and 1B, and by the feeding action moves rightward in the figure while being supported by each correction roller 1. be done. During a certain period of time after being sent into the moving path, the material comes in contact with the hot air blown out from the air outlet 41 of the blower 4 and is heated, and accordingly softens. The softened synthetic resin pipe 100 is easily straightened during subsequent movement, air-cooled, and sent out of the machine.

Here, if the synthetic resin pipe 100 is a corrugated pipe, even if it does not mesh with the unevenness 111 on the surface of the corrugated pipe 110, if the correction roller 1 is provided with even a slight unevenness, it will not slip and idle. As shown in FIG. 4, if the correction roller 1 is provided with unevenness 111 that engages with the unevenness 111 on the surface of the corrugated pipe 110, there is an advantage that the correction roller 1 will not slip at all.

(Effects of the Invention) As described above, according to the present invention, it is possible to easily correct 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 sectional side view showing the elevating mechanism, and Fig. 4 shows the main parts of a modified example of the orthodontic device. FIG. 1... Correction roller, 1A, 1B... Roller group, 41
...Air vent, 100...Synthetic resin pipe.

Claims (1)

[Scope of Claims] 1. A moving path for a synthetic resin pipe is formed between a pair of upper and lower roller groups formed by arranging a large number of straightening rollers in parallel, and the synthetic resin pipe fed into the moving path is supported by the straightening rollers. The synthetic resin pipe is moved by the feeding action of a straightening roller, and heated by blowing warm air onto the synthetic resin pipe during the movement, thereby softening and straightening the curled synthetic resin pipe. How to straighten synthetic resin pipes. 2 A pair of roller groups consisting of a large number of straightening rollers with a constricted central part arranged side by side are vertically spaced apart from each other to form a straight movement path for the synthetic resin pipe between the roller groups. An apparatus for straightening synthetic resin pipes, characterized in that an air outlet for blowing warm air between the straightening rollers arranged in parallel at the beginning of the roller group is provided.