JPH0436055B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an apparatus for forming a rolled flat tube into a cylindrical shape for covering the outer periphery of a cylindrical part.

(Prior art) When coating 2 on the outer periphery of a cylindrical part 1 as shown in FIG.
As shown in the figure, a flattened tube 3 is prepared in a rolled state, so that the flattened tube must be straightened in order to cover the object to be coated.

Conventionally, a method as shown in FIG. 3 has been used to perform such work. This involves inserting a float 4 with one end flat and the other end cylindrical inside the tube 3, and rolling the tapered part 4a of the cylindrical end of the float 4 from the outside of the tube 3 with a roller 5.
6 and pull the tube 3 toward the cylindrical end of the float 4 to hold the float 4. Also, after straightening the tube 3 and transporting the tube 3, even if the tube becomes flat again, the mouth should not be closed. It was meant to make it easier to open. However, as shown in FIG. 4, such a device tends to cause problems such as the creases 3a of the tube remaining in the flat state, making it difficult to properly cover the object to be coated, and also making it difficult to hold the float 4. Since this was done using two rollers 5 and 6, the holding was unstable and the mounting direction was limited to the vertical direction. Another drawback was that the float 4 was likely to get caught in the rollers 5 and 6 due to the friction between the float 4 and the tube 3.

(Purpose) The present invention is capable of straightening the folds of a flat tube and forming it into a cylindrical shape, stably holding a float, and eliminating problems such as the float and roller getting caught.
The purpose is to allow it to be mounted in any direction.

(Structure) In order to achieve the above object, the present invention comprises a pair of rollers that rotate in parallel at a predetermined interval and are disposed on a base so as to be perpendicular to each other in the upper and lower positions, and a cylindrical float is installed in a tube that is conveyed along the inside of the rollers. is inserted, and the outer surfaces of a pair of rollers disposed perpendicularly to the upper and lower positions of the cylindrical float are opposed to the rollers disposed on the base. A detailed description will be given below based on an embodiment of the present invention shown in FIGS. 5 to 8.

2 parallel to each other with a constant gap provided to the base 10
A pair of rollers 12a, 12b are supported by book shafts 11a, 11b. The rollers 12a and 12b have a constricted shape at the center. Similarly, the roller 12a of the base 10,
Axes 13a, 13b perpendicular to the rotational axis of 12b
A pair of rollers 14a and 14b are rotatably supported with a constant gap between them. The rollers 14a, 14b have a cylindrical shape.

Each roller is aligned so that the perpendicular bisector of the line connecting the axial centers A and A' of the rollers 12a and 12b and the axial centers B and B' of the rollers 14a and 14b coincides with each other. is placed.

A float 15 is inserted into the gap between the rollers 12a and 12b. The float 15 also passes through the gap between the rollers 14a and 14b, and while passing through the rollers 12a and 12b and the rollers 14a and 14b, the float has a cylindrical shape and its axis is at the center of the two sets of rollers. It coincides with the perpendicular bisectors C and C' connecting the .

Rollers 17a and 17b are provided on the upper side of the cylindrical portion of the float 15, and are supported by shafts 16a and 16b that are parallel to each other.
Rollers 19a and 19b are provided which are supported by shafts 18a and 18b perpendicular to roller 6b.

The rollers 17a and 17b have a bulging shape at the center and are in contact with rollers 12a and 12b provided on the base 10 from below via the tube 3. Moreover, the rollers 19a, 19b
are rollers 14a, 14 provided on the base 10.
b from above through the tube 3.

In other words, the roller 1 provided on the float 15
7a, 17b and 19a, 19b are base 10
rollers 12a, 12b and 14 provided in
14b.

Further, the upper end of the float 15 is formed flat, so that the flat tube 3 gradually bulges out.

Next, the effect will be explained. The tube 3 enters from above the float 15, which has a flat tip.Another roller (not shown) pulls the float in the flow direction toward the bottom of the float 15, so that the tube flows outside the float 15. become. At that time, rollers 12a, 12b and 17a, 1
7b corrects the curl when flattened, and rollers 14a, 14b and 19a, 19b stably hold the float 15.

(Effects) According to the present invention, a pair of rollers that rotate in parallel at a predetermined interval are disposed on a base so as to be orthogonal in the upper and lower positions, and a cylindrical float is inserted into a tube that is transferred along the inside of the rollers, and the cylindrical float is Since the outer surfaces of the pair of rollers disposed perpendicular to the upper and lower positions of the float are opposed to the rollers disposed on the base, the folds of the flat tube can be straightened and formed into a cylindrical shape, and the float can be held stably. , it eliminates problems such as the float and roller getting caught, and can be installed in any direction.

Incidentally, as in the illustrated embodiment, the float can also be used upside down if the two pairs of rollers provided on the float are positioned between the two pairs of rollers provided on the base.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a product coated with the device of the present invention, Fig. 2 is a perspective view of a rolled flat tube used for the coating in Fig. 1, Fig. 3 is a front view of the conventional device, and Fig. 4 is a perspective view of a product coated with the device of the present invention. 3 is a perspective view of the embodiment of the present invention, FIG. 5 is a partially cutaway perspective view of an embodiment of the present invention, FIG. 6 is a perspective view of the main part of the float of FIG. FIG. 8 is a plan view taken along the line BB in FIG. 3...Tube, 10...Base, 12a, 12b
...Base upper position roller, 14a, 14b...Base lower position roller, 15...Float, 17
a, 17b...Float upper position roller, 19
a, 19b...Lower position roller of the float.

Claims (1)

[Claims] A pair of rollers that rotate in parallel at a predetermined interval are arranged on a base so as to be perpendicular to each other in the upper and lower positions, and a cylindrical float is inserted into a tube that is transferred along the inside of the rollers, and the rollers are perpendicular to the upper and lower positions of the cylindrical float. A device for forming a flat tube into a cylindrical shape, in which the outer surfaces of a pair of rollers are opposed to the rollers provided on the base.