JPS588970B2 - It's important to know how to get started. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves inserting an antibody with a circular cross section and a covering material sheet surrounding the antibody into a depressurizing container with a plurality of flexible tubes attached to the inner peripheral surface under vacuum, Next, the pressure between the antibody and the coating material sheet is reduced by vacuum, and then normal pressure air is sequentially filled into the outer peripheral surface of the antibody in each section of the flexible tube divided in the circumferential direction, and the air is expanded due to the pressure difference. Pressing the coating material onto the outer circumferential surface of the antibody sequentially in the circumferential direction so as to avoid distortion or wrinkling of the coating material sheet, and then returning the pressure between the flexible tube and the coating material sheet to normal pressure. The purpose of this method is to adhere a covering material to the surface of a circular pile body under reduced pressure in a vacuum, and its purpose is to adhere a covering material to the outer circumferential surface of an antibody having a circular cross section over part or the entire length of the antibody at the same time. The object of the present invention is to provide an improved method for bonding dressings.

In the present invention, as described above, an antibody with a circular cross section and a covering material sheet surrounding the antibody are arranged in a decompression container with a plurality of flexible tubes attached to the inner peripheral surface, In this state, the inside of the container was vacuum-reduced to create a vacuum-reduced state between the antibody and the coating material sheet, and then air was sealed in each of the flexible tubes. The covering material sheet is inflated and pressed and adhered to the outer circumferential surface of the antibody in the axial direction.

In this case, in the present invention, a plurality of the flexible tubes are arranged on the inner peripheral surface of the decompression container, and by sequentially filling air into these flexible tubes, the covering material sheet is attached to the outer peripheral surface of the antibody. Since the covering material sheet is crimped sequentially in each section divided in the circumferential direction, there is no risk that the covering material sheet will be distorted or wrinkled.

Next, in the present invention, air is sealed in the depressurizing container to restore normal pressure between the flexible tube and the coating material sheet, but in the previous step, the pressure between the coating material sheet and the antibody is Since the former is crimped with a flexible tube while the space between them is in a vacuum-reduced state, there is almost no gap between the covering material sheet and the antibody. Even if the outer peripheral portion is then returned to normal pressure, the effect of pressing the covering material sheet against the antibody is not impaired.

Thus, the pressurizing force of the flexible tube is replaced by this normal pressure air.

According to the present invention, with such a simple configuration, a coating material sheet is adhered to the outer circumferential surface of an antibody having a circular cross section over a part or the entire length thereof, and furthermore, the coating material sheet is adhered to the outer circumferential surface of an antibody having a circular cross section. Since the antibody is crimped onto the outer surface of the antibody and then returned to atmospheric pressure, there is almost no gap left between the antibody and the coating material sheet, and a prestress close to 1 atm is applied from the outside after adhesion. As a result, the adhesive force between the antibody and the dressing sheet increases.

According to the method of the present invention, when the coating material sheet has thermoplasticity, the coating material sheet can be formed without using an adhesive by providing a heating means in the hollow part of the antibody or by supplying hot air. can be attached to the outer peripheral surface of the antibody.

The present invention will be described below with reference to the illustrated embodiments.

Reference numerals 1 and 2 denote semi-cylindrical upper and lower pressure reducing pipes constituting a pressure reducing container, and a plurality of pressurizing flexible tubes 3 with inlet/exhaust valves are attached to the inner peripheral surface thereof in the circumferential direction. has been done.

The inlet/exhaust valve of each flexible tube 3 is a flexible tube provided in each of the pipes 1 and 2. It is brought into a vacuum state by a vacuum pump 6 via a depressurizing hose 5 connected to a pressurizing port 4, and is in close contact with the inner circumferential wall surface of each of the pipes 1.2.

Note that 7a, 8a. 7b, sb, 7c. 8c is a stop valve for depressurization and pressurization of each flexible tube and tube 3 at the bottom, both sides, and top, and 7d and 8d are connected to a depressurization pipe depressurization pressurization port 9 provided in the upper pipe 1. Depressurization and pressurization stop valves are provided for the pressurization and depressurization hose 10, and reference numeral 11 is a vacuum decompression meter.

In the present invention, first, the covering material sheet 12 is fitted inside the lower pressure reducing pipe 2 so that both ends of the covering material sheet 12 in the circumferential direction face upward and are symmetrical.

At this time, if the covering material sheet 12 is divided in the longitudinal direction of the pile body 13, the covering material sheet 12 is sequentially fitted into the pipe 2 and the joint portion is only temporarily attached.

Next, a pile body 13 having a circular cross section is inserted inside the covering material sheet 12.

After setting the covering material sheet 12 and the pile body 13 on the lower pressure reducing pipe 2, the upper pressure reducing pipe 1 is superimposed on the same pipe 2, and the flange portions of both pipes 1 and 2 are placed in the middle. Bolt 15 with airtight packing 14 interposed
Concluded.

Next, the upper and lower pressure reducing pipes 1 are inserted from both ends of the pile body 13 in the longitudinal direction.
, 2, and the flange of the same side lid 16,
Airtight packing 17 is provided between the flanges of each of the pipes 1 and 2, and between the pipes and the pile body 13.
．． Fasten with bolts 19 so that 18 is inserted.

In this state, by appropriately opening and closing the stop valves 7d and gd, the space between the pile body 13 and the pressure reducing pipe 1.2 is brought into a vacuum state through the pressure reducing pipe 1.2.

Here, if heating is required when vacuum-pressing the covering material sheet 12 to the pile body 13, the heating unit 20 is inserted into the hollow part of the pile body 13 and activated, or Supply hot air.

When the above preparations are completed, close the stop valves 7a and 7b.
, 7c little by little, and normal pressure air is sealed in each of the flexible tubes 11 and expanded by the pressure difference,
The covering material sheet 12 is attached to the pile body 1 in the order of the bottom, both sides, and the top.
Press it onto the outer peripheral surface of 3.

In the present invention, the order in which the stop valves are opened little by little is important, and this order allows the covering material sheet 12 to be crimped onto the outer peripheral surface of the antibody in the order of the bottom, both sides, and top. , there is a risk that the covering material sheet 12 may be distorted or wrinkled.

In addition, by simply opening the stop valve little by little, normal pressure air enters the flexible tube and is expanded by the pressure difference with the vacuum area outside the flexible tube, so compressed air is not particularly required.

and other stop valves 8 except stop valve 8d
a, 8b. 8c is completely opened, and when the inside of each flexible tube 3 reaches normal pressure, the stop valve 7d is closed, the stop valve 8d is opened, and the pressure is constantly supplied into the decompression pipes 1 and 2 through the depressurization pipe decompression pressurization port 9. Send in pressurized air.

Here, the inside of the flexible tube 3 and the decompression pipe 1,
The pressures inside both are normal pressure.

In the previous step, the covering material sheet 12 and the pile body 13 are crimped by the flexible tube 3 in a vacuum state, and there is almost no gap between them.
Even if normal pressure air is fed into the outer periphery of both to return the pressure to normal pressure, the crimping effect will not be impaired.

This means that the pressure applied to the covering material sheet 12 by the flexible tube 3 has been replaced by normal pressure air in the pressure reduction pipes 1 and 2.

Next, the stop valves 8a, 8b, 8c are closed, and the stop valves 7a, 7b. 7c is opened and the inside of each flexible tube 3 is brought into a vacuum state again by the operation of the vacuum pump 6, so that the flexible tube 3 contracts and comes into close contact with the inner peripheral surface of each of the upper and lower pressure reducing pipes 1 and 2.

Next, the bolts 15 and 19 are loosened, the side cover 16 is removed, and the upper and lower pressure reducing pipes 1 and 2 are separated and the pile body 13 is taken out. body 1
3 is made up of.

In the embodiment described above, the covering material sheet 12 is initially inserted into the upper and lower depressurizing pipes 12 at a distance from the pile body 13, but the covering material sheet 12 may be inserted as necessary. 1
A large number of linear or curved thin grooves may be provided on the inner peripheral surface of the pile body 13, and the covering material sheet 12 may be temporarily wrapped around the pile body 13 in advance.

At this time, when the insides of the upper and lower depressurizing pipes 1 and 2 are transferred from a vacuum state to a normal pressure state, it is necessary to prevent air from entering between the covering material sheet 12 and the pile body 13.

For this, the surface temperature of the pile body 13 and the covering material sheet 1
The shapes of the two four-striped grooves are combined and controlled.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various designs without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of an apparatus for carrying out the method of the invention, and FIGS. 2 and 3 are longitudinal sectional views of its end and central parts, respectively. 1... Upper pressure reducing pipe, 2... Lower pressure reducing pipe, 3
... Flexible tube, 12 ... Covering material sheet, 1
3...Pile body.

Claims (1)

[Claims] 1. Insert an antibody with a circular cross section and a dressing sheet surrounding the antibody into a depressurizing container equipped with a plurality of flexible tubes in a vacuum state on the circumferential surface, and then insert the antibody and the dressing sheet surrounding the antibody and the dressing sheet. is vacuum-reduced, and then normal pressure air is sequentially filled into each section of the flexible tube divided in the circumferential direction of the antibody and expanded by the pressure difference, so that the coating material is applied to the antibody outer circumference. In a vacuum decompression characterized by sequentially crimping the flexible tube in the circumferential direction so that there is no risk of distortion or wrinkling of the covering material sheet, and then returning the pressure between the flexible tube and the covering material sheet to normal pressure. A method of adhering coating material to the surface of a circular pile body.