JPH11277620A - Method for straightening flexible cylinder and spindle cover for manual valve with straight cylinder as main part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use in various fields by placing a short cylinder in the state that its lengthwise direction elongation and contraction are allowed in a heater, and heat treating it at its thermal softening temperature or higher, thereby correcting a bending state of the cylinder by an easy means to a straight tube state. SOLUTION: A short cylinder 25 cut from a vinyl hose is contained in each containing part 37 of a partition base 35. A cover 36 is engaged with each guide rod 38, and placed on an upper part of each short cylinder 35 contained in each part 31. Then, an opening of the container 31 is coated with the cover 32, high temperature vapor of a predetermined temperature is supplied into a heating container 31, and the container 31 is held at a predetermined temperature of, for example, 85 to 110 deg.C for about 25 min. The each cylinder 25 is held at its thermally deforming temperature in a range of 65 to 80 deg.C. It is heat treated at the above-described temperature to be slightly longitudinally and radially contracted to form it to the straight tube state by an operation of a load from the cover 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straight pipe method for a flexible tubular body and a spindle cover for a manual valve mainly including the straight tubular body.

[0002]

2. Description of the Related Art A flexible synthetic resin short tubular body is inexpensively formed by cutting a long hose-shaped tubular body mass-produced into a predetermined length. Expected to be used in

[0003]

Since a long hose-shaped cylinder is usually shipped in a state wound in a coil, it is formed by cutting the hose-shaped cylinder into a predetermined length. The short cylindrical body has a curved shape with the wound coil shape remaining. For this reason, the short tubular body formed in this manner is restricted in use in various fields unless the remaining curved shape is corrected to a straight tubular shape.

[0004] Accordingly, an object of the present invention is to correct the curved shape of the above-mentioned short cylindrical body by a simple means to make it a straight pipe shape, thereby enabling use in various fields. .

[0005]

The first invention of the present invention relates to a method for straight pipe of a flexible cylinder, the straight pipe method comprising:
A long hose-shaped cylinder made of a flexible synthetic resin wound in a coil shape a plurality of times is cut into a predetermined length to form a short cylinder, and the short cylinder is placed in a heater. The heat treatment is carried out at a temperature not lower than the thermal softening temperature of the short cylindrical body while the short cylindrical body is accommodated in a state where expansion and contraction in the longitudinal direction is allowed.

A second invention of the present invention is a spindle cover for a manual valve mainly comprising a short straight tubular cylinder obtained by the straight pipe method according to the first invention. When,
With a cap that covers the opening at the tip of the straight tubular body,
The straight tubular body is made of a transparent and flexible synthetic resin, and is sized to be fitted to the distal end of a handle located at the outer periphery of the proximal end of the spindle of the manual valve and to accommodate the spindle. It is characterized by the following.

In the spindle cover for a manual valve, it is preferable to employ a means for fixing the straight tubular body to a distal end portion of a handle of the manual valve via a fastening band.

[0008]

According to the straight pipe method according to the first aspect of the present invention, the curved shape is changed to a straight pipe shape by heating the short cylindrical body in a state of allowing its longitudinal expansion and contraction. Can be corrected easily and inexpensively. For this reason, a short straight tubular body can be provided at low cost, and can be used in various fields.

A second invention of the present invention has developed a use of a short straight tubular cylinder obtained by the straight pipe method according to the first invention, and constitutes a conventional spindle cover for a manual valve. It is possible to replace the rigid cylindrical body such as an acrylic resin with the flexible short straight tubular body described above, and thereby, a spindle cover having a rigid cylindrical body such as an acrylic resin as a main part can be formed. In comparison, the following remarkable effects are achieved.

That is, in the conventional spindle cover for a manual valve, there is a problem that the cylindrical body, which is a main component, is whitened at an early stage, impairing visibility, easily cracking, and easily damaged by impact. However, it is necessary to adopt a screw-in method as a fixing means for the manual valve, so that the screw portion is frequently damaged, and furthermore, there are various problems that rust is easily generated in the screw portion. According to the spindle cover for a manual valve, all of these problems can be solved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows a distal end portion of a manual valve equipped with a spindle cover according to an example of the present invention. The manual valve 10 is disposed in the middle of a transfer pipe for transferring a fluid, and opens and closes the transfer pipe. By rotating the handle 11 in one direction, the spindle 12 is screwed and a valve (not shown) is driven. By moving the body forward to close the transfer tube and rotating the handle 11 in the other direction, the spindle 12 is screwed back to retract the valve body (not shown) to open the transfer tube.

The spindle cover 20 has high transparency, is fitted and fixed to the outer periphery of the upper end cylindrical portion 13 of the handle 11, and accommodates the spindle 12. The spindle cover 20 protects the spindle 12 and also controls the advance / retreat state of the spindle 12 to the outside. It is made visible from. The monitoring operator can check the open / closed state of the transfer pipe by the manual valve 10 by visually recognizing the advance / retreat state of the spindle 12 through the spindle cover 20 from the outside.

The spindle cover 20 comprises a straight tubular cylinder 21
And a cap 22 detachably fitted to the distal end of the straight tubular cylinder 21 to cover the opening at the distal end.
The base end of the handle 1 is fitted to the outer periphery of the upper end cylindrical portion 13 of the handle 11 and is fixedly fastened by a tightening band 23.

The straight tubular cylinder 21 is made of soft polyvinyl chloride and has a high degree of transparency, and a long vinyl hose 24 wound a large number of times as shown in FIG. It is formed by cutting and performing straight pipe processing. A processing apparatus for performing straight pipe processing is shown in FIGS.

The straight pipe processing apparatus 30 includes a heating vessel 31 opening upward, a lid 32 covering the opening of the heating vessel 31,
The shelf 33 includes a shelf 33 provided inside the heating vessel 31, a steam ejection pipe 34 provided inside the heating vessel 31, and a processing table 30 a placed on the shelf 33. The steam ejection pipe 34
A plurality of ejection ports are provided at predetermined intervals in the longitudinal direction, and functions to uniformly eject high-temperature steam of a predetermined temperature supplied from a steam generation source into the heating vessel 31.

The processing table 30a includes a partition table 35 and a lid 36.
The partition 35 has a plurality of storage sections 37 defined by a plurality of partition plates 35a. Each accommodation part 37
The upper portion and the front and rear portions are open, and are formed in such a size that the short tubular body 25 cut from the vinyl hose 24 is just accommodated and arranged in parallel. Guide rods 38 are erected at the four corners of the partition table 35, and the lid 36 is fitted to each guide rod 38 so as to be slidable in the vertical direction.
Each short cylinder 25 accommodated in each accommodation part 37 of the partition 35
Placed on top of

In order to straight-tube each short cylinder 25 using the straight pipe processing apparatus 30, the short cylinder 25 cut from the vinyl hose 24 is accommodated in each accommodating portion 37 of the partition 35. At the same time, the lid 36 is fitted to each guide rod 38, and the short 36
5 is placed on top. FIGS. 3 and 4 show this state. In this state, a lid 36 is placed on each short cylinder 25.
Are applied substantially evenly.

Next, the opening of the heating vessel 31 is
Then, high-temperature steam at a predetermined temperature is supplied into the heating vessel 31 and the inside of the heating vessel 31 is kept at a predetermined temperature in the range of 85 ° C to 110 ° C for about 15 minutes. The heat deformation temperature of each short cylindrical body 25 is in the range of 65 ° C. to 80 ° C., and by performing the heat treatment at the above-described temperature, the heat shrinks slightly in the longitudinal direction and the radial direction, and the load from the lid 32 acts. This causes a straight pipe state.

After the heat treatment, after confirming that the temperature inside the heating vessel 31 has dropped, each short cylinder 25 is taken out of the heating vessel 31 and cooled with water. Thereby, each short cylinder 25 is converted into a straight tubular cylinder 21.

As described above, if each short cylindrical body 25 is subjected to straight pipe processing using the above-described straight pipe processing apparatus 30, the curved short cylindrical body 25 can be easily and inexpensively converted into the straight tubular cylinder 21. can do. Therefore, the straight tubular body 21 can be provided at low cost, and can be used in various fields.

The straight tubular cylinder 2 thus formed
1 can be replaced with a hard cylinder such as an acrylic resin which is a cylinder of a conventional spindle cover.
Compared to the conventional spindle cover, it prevents the lowering of visibility due to the early whitening of the cylinder that is the main component,
It is possible to improve the damage resistance against cracks and impacts, and to abolish the use of the screwing method as a fixing means for the manual valve 10, thereby eliminating the damage of the screw portion due to the screwing method and the occurrence of rust on the screw portion. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of a state in which a spindle cover according to an example of the present invention is mounted on a handle of a manual valve.

FIG. 2 is a perspective view of a long tubular body wound in a coil shape forming a straight tubular tubular body constituting the spindle cover.

FIG. 3 is a vertical sectional front view of a straight pipe processing apparatus for forming the straight tubular cylinder.

FIG. 4 is a vertical sectional side view of the straight pipe processing apparatus.

[Explanation of symbols]

10: manual valve, 11: handle, 12: spindle, 1
DESCRIPTION OF SYMBOLS 3 ... Upper end part, 20 ... Spindle cover, 21 ... Straight tubular cylinder, 22 ... Cap, 23 ... Tightening band, 24 ... Vinyl hose, 25 ... Short cylinder, 30 ... Straight pipe processing apparatus, 3
0a: working table, 31: heating vessel, 32: lid, 33:
Shelf, 34: steam ejection tube, 35: partition, 35a: partition plate, 36: lid, 37: accommodation part, 38: guide rod.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsumi Ogino 3-5 Higashihama, Tobishima-mura, Kaifu-gun, Aichi Prefecture Inside Techno-Chubu Nishi-Nagoya Office (72) Inventor Minoru Matsuno 3-5 Higashihama, Tobishima-mura, Kaifu-gun, Aichi (72) Inventor Motohide Akutsu 3-5 Higashihama, Tobishima-mura, Kaifu-gun, Aichi Prefecture Company (72) Inventor Tomohisa Tanaka 3-5, Higashihama, Tobishima-mura, Kaifu-gun, Aichi Techno Chubu Nishi-Nagoya Office (72) Inventor Sadao Tanaka 3-5 Higashihama, Tobishima-mura, Kaifu-gun, Aichi Prefecture (72) Inventor Mashiro Nagatomi 3- Higashihama, Tobishima-mura, Kaifu-gun, Aichi Prefecture 5 Inside Techno Chubu Nishi-Nagoya Office

Claims (3)

[Claims] 1. A short tubular body formed by cutting a long hose-shaped tubular body made of a flexible synthetic resin in a state of being wound a plurality of times into a coil shape to form a short tubular body. The flexible cylinder characterized in that the body is accommodated in a heater in a state in which the short cylinder is allowed to expand and contract in the longitudinal direction, and is heated at a temperature equal to or higher than the heat softening temperature of the short cylinder. Straight pipe method. 2. A spindle cover for a manual valve mainly comprising a short straight tubular body obtained by the straight tubular method according to claim 1, wherein said straight tubular body and said straight tubular body are provided. A cap that covers the distal opening of the manual valve, wherein the straight tubular body is made of a transparent and flexible synthetic resin, and is fitted to the distal end of a handle located at the outer periphery of the proximal end of the spindle of the manual valve. A spindle cover for a manual valve, wherein the spindle cover is formed in a size to accommodate a spindle. 3. The spindle for a manual valve according to claim 2, wherein the straight tubular cylinder is fixed to a distal end portion of a handle of the manual valve via a tightening band. cover.