JPH0599391A - Spiny skin-linear body and spiny skin-tape - Google Patents

Abstract

PURPOSE:To enhance the ability of a linear body to pass through a pipe, etc., to prevent damage to the linear body when it is fed into the pipe, etc., by arranging plural number of needle projections mutually spaced over the cylindrical surface of the linear body, and setting the length of the needle projections larger than the pitch in which the needle projections are arranged. CONSTITUTION:With a spiny skin-linear body A, plural number of needle projections 12 are integrally arranged mutually spaced in a zigzag pattern over the cylindrical surface of a linear body 3 of an electric cable, etc., and the length of the needle projections 12 is set larger than the pitch P in which the adjacent needle projections 12 are arranged. When the needle projections contact an obstruction, etc., in feeding the spiny skin-linear body into a pipe or a narrow part, the needle projections are elastically deformed to generate an aligning effect by which the needle projections escape in the direction of avoiding the obstruction by an reaction force due to the elastic deformation, and thus interference of the needle projections with the obstruction is reduced to prevent the generation of an accident such that the obstructions are caught by the needle projections in the course of feeding the linear body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinous skin linear body and a spinous skin tape, and more particularly to a technique for feeding a linear body or working equipment into a pipe or a narrow portion.

[0002]

2. Description of the Related Art In the case of laying filaments such as electric cables in buildings or various plants, the filaments (electrical cables, etc.) suitable for the purpose are stored in steel pipes,
The safety against the external environment is being increased.

One of the methods for drawing the filamentous body into such a steel pipe or the like is to insert a messenger wire into the pipe beforehand and connect the distal end of the filamentous body to the messenger wire.
There is a method of introducing the striatum into the tube by the operation of pulling the messenger wire.

In the case where the filamentous body extends over a plurality of lines, the plurality of filamentous bodies may be bundled at a plurality of locations with a binding band or the like and pulled by a messenger wire. If there is a bulged portion, it tends to be caught by a protrusion or a bent portion in the pipe, which reduces the workability of laying the filamentous body.

On the other hand, if only one tube opening such as a steel tube into which the filament is to be inserted can be used, the method of inserting the messenger wire in advance and pulling it in cannot be adopted, so that it is open. It is considered to adopt a method of forcibly sending in using pressurized air or pressurized water from the pipe mouth.

FIG. 6 shows the inside of a small-diameter pipe (tube) 1 of a heat exchanger used in a nuclear power generation-related facility, a thermal power plant, a chemical plant, etc. An example is shown in which various working devices (for example, a sensor probe) 2 for feeding are used by using pressurized air, and a linear body 3 such as an electric cable connected to the working device 2 is shown.
In addition, a plurality of floats 4 are attached, the filament device 3 is fed into the pipe 1 from the feeding device 5, and the working equipment 2, the float 4, etc. are fed from the pressurized air supply system 6 as shown by the arrow. It is put on pressurized air and sent to the target position. In FIG. 6, reference numeral 7 is a control unit,
Reference numeral 8 is a data processing unit, 9 is a recording unit, and 10 is a controller.

[0007]

However, in the method of transferring the working equipment 2 and the float 4 by the pressurized air,
As shown by the solid line in FIG. 7, it is preferable to make the gap between the inner wall of the tube 1 and the float 4 small enough to allow the float 4 to pass through the inside of the tube 1 from the viewpoint of improving efficiency. When the welded portion 11 is formed on the inner surface and a part of it (the backside portion) protrudes inward, or the circularity of the tube 1 is low and the outer diameter of the float 4 is not much different from the minimum inner diameter of the tube 1. Then,
As shown by the chain line in FIG. 7, a portion where the float 4 is caught in the middle of the tube 1 is likely to occur, and the feeding of the filamentous body 3 is likely to be impaired.

The present invention effectively solves the problems of the prior art. In other words, when feeding the filamentous body to the narrow part such as in the pipe, while improving the mobility of the filamentous body, guide the center of the filamentous body to the center of the pipe or the narrow part,
The purpose is to reduce interference with tubes and protrusions.

[0009]

In order to achieve the above object, two means have been proposed. A first means relates to a spinous striatum, in which a plurality of elastic needle-like protrusions are integrally arranged at intervals on a cylindrical surface of the striatum body, and the length of the needle-like protrusions is Is set to be larger than the arrangement pitch of the needle-like protrusions. The second means relates to a bark tape, and is a tape material wound around the surface of the linear body, and a plurality of elastic needle-like projections that are integrally arranged at intervals on the surface of the tape material. And the length of the needle-like protrusions is set to be larger than the mutual interval of the needle-like protrusions.

[0010]

In the first means, the outer diameter of the entire needle is increased by the amount of protrusion of the needle-like protrusion from the cylindrical surface of the linear member, and a large force acts on the tip of the needle-like protrusion. , The needle-like protrusions are elastically deformed. Therefore, if there is something that comes into contact with the needle-like protrusions to try to prevent their movement during movement of the filamentous body, the needle-like protrusions in the contacted portion will move backward and escape, causing the needle-like protrusions to contact. Allow sliding movement to the part that has been made. Further, when the needle-like protrusions are largely deformed until they are in a lying state, for example, the adjacent needle-like protrusions are deformed due to the relationship between the length of the needle-like protrusions and the arrangement pitch, and the cylinder of the filamentous body portion. A gap is maintained between the curved surface and the contact portion of the needle-like protrusion, and a centering action for returning the linear body portion to the center is generated by the reaction force of the elastic deformation of the needle-like protrusion. In the second means, the spinous striatum is formed by winding it on the surface of the striatum. Therefore, when it is tightly wound around the surface of one filament, the action according to the first means occurs, and when it is wound around a plurality of filaments and they are bundled, the entire surface is covered. The needle-like protrusions are arranged in the state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the barium striatum according to the present invention will be described below with reference to FIG. The spinous striatum A is
A plurality of needle-like protrusions 12 are integrally arranged in a zigzag manner over the entire surface with a space between them on the cylindrical surface of the filamentous body portion 3 of an electric cable or the like. L
However, it is set to be larger than the arrangement pitch P of the adjacent needle-like protrusions 12.

Further, when the outer skin (sheath) of the filamentous body portion 3 is a plastic such as polyvinyl chloride or polypropylene, the needle-like projections 12 are also formed of the same material at the same time when the outer skin is formed. ..

On the other hand, FIGS. 2 and 3 show a bark tape according to the present invention. The spine tape is formed on the cylindrical surface of the linear body 3 or a plurality of linear bodies 3 as described later.
The tape material 13 is wound around the tape material 13, and the plurality of needle-shaped projections 12 are integrally arranged on the surface of the tape material 13 with a space therebetween. The forming material of is similar to the above-mentioned outer skin.

The spine tape B is provided with a tape material 1 in order to improve workability and fixing property when wound around the filament body 3.
An adhesive layer 14 made of an adhesive is formed on the back surface of 3, and a release paper 15 covering the adhesive layer 14 is attached to the adhesive layer 14.

FIG. 4 shows a work situation in which the filamentous body 3 in which the spinous tape B is spirally wound is fed into the tube 1 according to the example of FIG. When the spinous skin tape B is tightly wound around the cylindrical surface of the striatum 3, the surface state is similar to that of the spinous striatum A of FIG. ..

When the barb tape B is wound around the surface of the filamentous body 3, the thickness of the tape material 13 and the adhesive layer 14 from the cylindrical surface of the filamentous body 3 corresponds to the protruding dimension of the needle-like projection 12. The total outer diameter increases by twice the added dimension, and when this outer diameter is smaller than the inner diameter of the pipe 1, the pipe 1
A gap is created between the inner wall of the needle and the tip of the needle-shaped protrusion 12. If the outer diameter is slightly larger than the inner diameter, the pipe 1
The tip of the needle-like protrusion 12 comes into contact with the inner wall of the needle, and is elastically deformed.

When pressurized air is fed into the tube 1 in this state, a large resistance force is generated instead of the float 4 based on the resistance of the air flowing through the gaps between the needle-like projections 12, The filamentous body 3 is delivered to the back of the tube 1.

When a large force acts on the needle-like protrusion 12, the needle-like protrusion 12 is elastically deformed in the direction of the force. Therefore, as shown in FIG. 5, when the linear body (linear body portion) 3 is moving, something that comes into contact with the needle-shaped projection 12 and tries to hinder its movement, such as a projection of the welded portion 11, is present. Since the needle-like protrusions 12 of the contacted portion are warped and escape backward by moving, the needle-like protrusions 12 lie on the protrusions of the welded portion 11 as the warp deepens, and the needle-like protrusions 12 slide and move with respect to the contacted portion. Will be tolerated.

As described above, when the amount of deformation of the needle-like protrusions 12 becomes large, one needle is considered to satisfy the condition that the arrangement pitch P is smaller than the length L of the needle-like protrusions 12. While the needle-like protrusions 12 are deformed, the adjacent needle-like protrusions 12 are deformed, that is, a phenomenon occurs in which a plurality of needle-like protrusions 12 are simultaneously deformed, and a linear body (a linear body) is formed at the contact portion. Direct contact of the cylindrical surface of the body 3 is prevented. Further, as shown in FIG. 5, when the needle-like protrusion 12 is deformed, the reaction force of the elastic deformation of the needle-like protrusion 12 is used to return the filamentous body (the filamentous body portion) 3 to the center. Since a centering action occurs, a gap is maintained between the cylindrical surface of the linear body (linear body portion) 3 and the contact portion of the needle-like protrusion 12. Since the welded portion 11 in the example of FIG. 5 is formed in an annular shape, the linear body (linear body portion) 3 is arranged at the center position.

<Other Embodiments> In the above-described spinous linear filament and spinous tape, the following technique can be adopted instead of the constitution of the embodiment. Use a mixture of different lengths (heights) of the needle-shaped protrusions. The needle-like protrusions should have an arbitrary shape such as a thick base and a thin tip. Allow freedom in the relationship between the length of the needle-like protrusions and the thickness of the tape material. Form the outer skin or tape of the filament and the needle-shaped protrusions with different materials. When winding or bundling spinous tape around any number of filaments, use open spiral winding, close winding, or multiple winding depending on the surface condition.

[0021]

According to the first aspect of the present invention, that is, the spinous striatum according to claim 1, a plurality of needle-like projections are integrally arranged with a space on the cylindrical surface of the striatum, Since the length of the protrusions is set to be larger than the arrangement pitch of the needle-like protrusions, the following effects are obtained. (1) When the spinous striatum is fed into the tube or into the narrow space, the needle-like protrusions elastically deform when they come into contact with obstacles,
The reaction force of this elastic deformation causes a centering effect of escaping in the direction avoiding the obstacle, and it is possible to reduce interference with the obstacle and prevent occurrence of an accident such as catching on a protruding portion during feeding. (2) If the needle-like protrusions are elastically deformed as described above,
When the contact is strengthened, the needle-like projections are warped rearward to reduce the frictional force, so that sliding of the contact portion is allowed and the feeding property of the filamentous body can be improved. (3) Even if the needle-like protrusions are largely deformed due to contact with an obstacle or the like, the adjacent needle-like protrusions are simultaneously deformed due to the relationship between the length and the arrangement pitch. Direct contact with the surface of the filament body is avoided, and the filament body is not damaged. (4) If the outer skin of the striatum is plastic,
The same material or the like can be integrally molded and can be easily manufactured. (5) When the filamentous body or the like is fed into the pipe by pressurized air or the like, by utilizing the resistance generated at the needle-like projection portion, the structure is simplified as compared with the conventional technique, and the pipe is Even if there is a protrusion such as a welded portion on the road, it is possible to improve the passage property of that portion and avoid the occurrence of a trapping accident. A second invention, that is, a spine tape according to claim 2 is a tape material wound around the surface of a filamentous body, and a plurality of needle-shaped tapes that are integrally arranged at intervals on the surface of the tape material. And the length of the needle-like protrusions is set to be larger than the mutual distance between the needle-like protrusions, the following effects can be obtained. (1) The wound portion is provided by wrapping spinous tape around the surface of the striatum that may come into contact with obstacles or equipment in the vicinity thereof, and disposing the desired needle-shaped protrusions only in the required range. Is equivalent to the spinous striatum in the first invention, the same effect can be obtained, and the winding work can be easily performed. (2) The spinous tape is wrapped around a plurality of striatum so that the striatum is bundled and
The presence of needle-like protrusions on these surfaces can improve the drawing-in property and the feeding-in property when the filamentous body is laid.

[Brief description of drawings]

FIG. 1 is a partially omitted front view showing an embodiment of a spinous striatum according to the present invention.

FIG. 2 is a front sectional view with a part omitted showing an embodiment of a spine tape according to the present invention.

FIG. 3 is a partially omitted plan view showing an embodiment of a spine tape according to the present invention.

FIG. 4 is a front cross-sectional view showing a main part of an example of sending working equipment connected to a barb striatum or the like according to the present invention using pressurized air.

5 is a front cross-sectional view showing an elastically deformed state of a needle-shaped protrusion due to contact with a protrusion of a welded portion during movement of the linear member (stripe member) in FIG. 4;

FIG. 6 is a front cross-sectional view showing a situation in which working equipment is fed into a small-diameter pipe (pipe) using pressurized air.

FIG. 7 is a front sectional view showing the relationship between the float and the welded portion in FIG.

[Explanation of symbols]

 A spinous skin striatum B spinous skin tape 1 small diameter pipe (tube) 2 working equipment (sensor probe) 3 striatum (striatal body part) 4 float 5 feeding device 6 pressurized air supply system 7 control unit 8 data processing unit 9 Recording part 10 Controller 11 Welding part 12 Needle-like protrusion 13 Tape material 14 Adhesive layer 15 Release paper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seisei Kimura No. 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi Kawashima Harima Heavy Industries Ltd. Yokohama No. 1 Factory

Claims (2)

[Claims] 1. A plurality of needle-like protrusions having elasticity are integrally arranged at intervals on the cylindrical surface of the linear member, and the length of the needle-like protrusions is larger than the arrangement pitch of the needle-like protrusions. A striatum striatum characterized by being set large. 2. A tape material wound around the surface of a filament,
The tape material is composed of a plurality of elastic needle-like projections that are integrally arranged at intervals on the surface of the tape material, and the length of the needle-like projections is set to be larger than the mutual distance between the needle-like projections. Thorn skin tape.