JPH11289627A - Attachment method for elastomer pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment method of an elastomer pipe by which the diameter of the elastomer pipe can be expanded and held stably, without deformation of a core member. SOLUTION: A belt-shaped molded element 11 has a 1st mating part on its one surface along its one side part and a 2nd mating part on its other surface along its other side part. The belt-shaped molded element 11 is wound into a spiral form, and the 2nd mating part is engaged with the 1st mating part so as to have the 2nd engaging part upon the 1st mating part to form a cylindrical core member. An elastomer pipe whose diameter is expanded is put on the cylindrical core member to obtain an elastomer pipe with a built-in core member. The elastomer pipe with a built-in core member is put on a covered object whose diameter is smaller than the inner diameter of the cylindrical core member so as to have the 1st mating part on the leading side of the progressing direction of the spiral. The end part of the belt-shaped molded element, of which the leading end part of the spiral of the cylindrical core member is composed, is successively pulled to unfasten the spiral, and the core member is removed from the elastomer pipe with the built-in core member for applying elastomer pipe directly to the circumference of the covered object.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting an elastomeric tubular body, a core member for maintaining the diameter of the elastomeric tubular body, and an elastomeric tubular body containing a core member.

[0002]

2. Description of the Related Art Conventionally, an elastomeric tubular body is attached to a terminal connection or a straight connection of a power cable for insulation, airtightness, and mechanical protection. Attachment of the elastomer tubular body to the adherend is performed by covering the expanded elastomer tubular body with a core member for increasing the diameter, holding the elastomer tubular body in the expanded state, and then placing the core member on the adherend. And finally by removing the core member.

As shown in FIG. 6, a core member for expanding the diameter is formed by joining a band-shaped molded body 1 having a cross section having a front fitting portion 2 and a rear fitting portion 3 to a front portion as shown in FIG. A cylindrical body 4 is formed by meshing the mating portion 2 and the rear fitting portion 3 and spirally winding in the direction of arrow A. This tubular body 4 is stored in a state where the expanded elastomer tubular body is covered on the outer periphery, that is, as an elastomer tubular body with a built-in core member,
Transported and ready for use.

The removal of the cylindrical body 4 constituting the core member for maintaining the diameter from the elastomer tubular body is performed as shown in FIG. That is, the band-shaped molded body 1 at the end of the cylindrical body 4 is moved from the gap between the cylindrical body 4 and the adherend (not shown) by an arrow B.
This is done by unwinding by pulling while rewinding in the direction of. In FIG. 8, reference numeral 31 denotes an elastomer tubular body.

[0005]

However, as shown in FIG. 7, such a conventional core member for maintaining a large diameter is engaged at the front end in the mounting direction by a contraction force of an elastomer tubular body from the periphery. There is a problem that the alignment is naturally released. In particular, as shown in FIG. 9, when the diameter of the elastomer tubular body 5 is enlarged from the middle, the contraction force of the elastomer tubular body 5 acts strongly on the enlarged diameter portion, and the core member 4 is collapsed.

[0006] For example, in the case where a conductor connection terminal is integrated with an elastomer tubular body at a terminal connection portion of a cable, a core member having a different diameter may be used. Since it is not possible to pull out to the terminal side, it is necessary to pull out to the cable sheath side, but at this time, the core member is easily deformed at the tapered portion having a different diameter, and particularly when the taper is large, the core member itself is configured I can't do that.

[0007] An object of the present invention is to provide a method of mounting an elastomeric tubular body, which makes it possible to stably expand the diameter of the elastomeric tubular body without breaking the core member.

Another object of the present invention is to provide a core member for maintaining the diameter of an elastomer tubular body used in such a method for mounting an elastomer tubular body. It is yet another object of the present invention to provide an elastomeric tubular body incorporating such a core member.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a first fitting portion on one main surface of one side end and a first fitting portion on the other main surface of the other side end. The belt-shaped molded body having the two fitting portions is fitted into the first fitting portion so that the second fitting portion is overlapped with the second fitting portion, and is formed into a spiral shape. A step of mounting an expanded elastomeric tubular body around a wound cylindrical core member to form an elastomeric tubular body containing a core member, and attaching the elastomeric tubular body containing a core member to the first fitting portion. Is formed around an adherend having a diameter smaller than the inner diameter of the tubular core member so that the spiral comes forward in the traveling direction of the spiral. Pull back while rewinding the end of the body,
Removing the core member from the core-containing elastomeric tubular body by successively unwinding, and attaching the elastomeric tubular body around the adherend.

Further, the present invention provides a strip-shaped molded body having a first fitting portion on one main surface of one side end and a second fitting portion on the other main surface of the other side end. A cylindrical core member formed by fitting the second fitting portion to the first fitting portion such that the second fitting portion overlaps with the first fitting portion and spirally winding the second fitting portion. A small-diameter portion, a large-diameter portion, and a tapered portion connecting the small-diameter portion and the large-diameter portion. Provide a core member for use.

Further, the present invention provides a strip-shaped molded body having a first fitting portion on one main surface of one side end and a second fitting portion on the other main surface of the other side end. A cylindrical core member formed by fitting the second fitting portion to the first fitting portion so that the second fitting portion overlaps with the first fitting portion, and winding the same in a spiral shape; Around the core member, a part thereof is formed of an elastomer tubular body, and the elastomer tubular body is not attached around the core member and the enlarged diameter portion attached around the core member. A core member-containing elastomeric tubular body comprising a non-diametered portion having a diameter smaller than the diameter-expanded portion, wherein the first fitting portion is on the non-diametered portion side.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a core member for maintaining an expanded diameter of an elastomer tubular body used in the method of the present invention. As shown in FIG. 1, the band-shaped molded body (ribbon) 11 has a front fitting portion (first fitting portion) on one main surface (upper surface) 8a of one side end (right end) 7a. 12,
The other main surface (lower surface) 8 of the other side end (left end) 7b
b has a rear fitting portion (second fitting portion) 13.

As shown in FIG. 2, the band-shaped molded body 11 is engaged with the front fitting portion 12 and the rear fitting portion 13 and spirally wound in the direction of arrow A to maintain the expanded diameter. The core member 14 is formed. The band-shaped molded body 11 is usually
It is made of synthetic resin such as polypropylene and polyethylene.

The band-shaped molded body 11 used for the core member 14 shown in FIG. 2 is compared with the band-shaped molded body 1 used for the conventional core member 4 shown in FIG. As can be seen, the front fitting portion and the rear fitting portion are the same except that they are upside down. That is, in FIG. 2, the front fitting part 2 is a downward hook and the rear fitting part 3 is an upward hook, whereas in FIG.
When the front fitting portion 12 is an upward hook and the rear fitting portion 13 is a downward hook, and the front fitting portion 12 is spirally wound in the direction of arrow A, It is wound so that it is located ahead.

The core member 14 is covered with the expanded elastomer tubular body to form a core member built-in elastomer. After the core member 14 is attached to the adherend, only the core member 14 is removed, so that the elastomer tubular body is removed. Is attached to the adherend.

As the elastomeric tubular body, a rubber-like substance,
For example, it can be composed of silicon rubber, ethylene / propylene rubber, chloroprene rubber, or the like. In addition, as the adherend, there are a terminal connection portion and a straight connection portion of a cable, a connection portion of a gas or liquid pipe, and an elastomer tubular body is attached for insulation, waterproof, airtightness, and mechanical protection. You.

As shown in FIG. 8, the removal of the core member 14 from the elastomeric tubular body is performed by removing the band-shaped molded body 11 at the front end of the core member 14 from the gap between the core member 14 and the adherend. This is done by unwinding by pulling while rewinding in the direction B. At this time, at the front end of the core member 14, as shown in FIG. 3, the downwardly-facing rear fitting portion 13 of the last turn and the upwardly-facing front fitting portion 12 of the immediately preceding turn are formed in a belt shape. The end of the molded body 11 is meshed in a shape that is difficult to unravel.

Therefore, at the front end in the mounting direction, the engagement is not spontaneously released due to the contraction force of the elastomer tubular body from the surroundings, and the core member 14 is stably removed from the adherend. It is possible.

FIG. 4 shows another embodiment of the present invention, which shows a case where not all of the elastomeric tubular body is partially expanded in diameter. As the core member 14, the same one as in FIG. 2 is used. That is, in FIG. 4, the diameter of the middle portion 22 of the elastomer tubular body 21 is expanded, and
4.

In this case, since the contraction force of the elastomeric tubular body strongly acts on the end of the core member 14, the core member 14 according to the present invention is easily broken as shown in FIG. The contraction force of the tubular body is the core member 1
Even if it works strongly on the end of 4, the engagement of the fitting portion is difficult to disengage, so it does not collapse.

FIG. 5 shows still another embodiment of the present invention, in which a core connecting member 24 of a different diameter is used, such as a cable having a conductor connecting terminal integrated with an elastomer tubular body in a terminal connecting portion 23. Is shown. In this case, as described above, since the core member 24 cannot be pulled out to the conductor connection terminal 25 side, it is necessary to pull out the core member 24 to the cable side. The members do not collapse.

[0022]

As described above, according to the present invention,
A belt-shaped molded body having a first fitting portion on one main surface of one side end and a second fitting portion on the other main surface of the other side end, respectively, The second fitting portion is fitted so that the second fitting portion overlaps with the upper portion, that is, the second fitting portion is difficult to be unraveled, and is spirally wound to form a cylindrical core member. The engagement of the core member from the adherend can be stably performed without the engagement being spontaneously released due to the contraction force of the elastomer tubular body from the surroundings. In addition, it is possible to obtain a core member having a different diameter, which has been difficult in the past, and to manufacture an elastomer tubular body having a partially expanded diameter.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a band-shaped molded body constituting a core member for maintaining a diameter of an elastomeric tubular body, which is used in a method for mounting an elastomeric tubular body according to one embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a core member for maintaining the diameter of the elastomer tubular body used in the method for mounting the elastomer tubular body according to one embodiment of the present invention.

FIG. 3 is a sectional view showing a state where the core member shown in FIG. 2 is pulled from an end.

FIG. 4 is a view showing another embodiment of the present invention,
FIG. 3 is a partial cross-sectional view showing an elastomer tubular body containing a core member.

FIG. 5 is a diagram showing a terminal connection portion of a cable using a core member having a different diameter according to still another embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a belt-shaped molded body constituting a core member for maintaining a diameter of an elastomer tubular body, which is used in a conventional method for mounting an elastomer tubular body.

FIG. 7 is a partial cross-sectional view showing a core member for maintaining a diameter of an elastomer tubular body, which is used in a conventional method for mounting an elastomer tubular body.

FIG. 8 is a diagram showing removal of a core member for retaining a diameter from an elastomeric tubular body in a conventional method for mounting an elastomeric tubular body.

FIG. 9 is a partial cross-sectional view showing a conventional elastomer tubular body with a built-in core member, the diameter of which expands in the middle.

[Explanation of symbols]

 Reference numerals 1, 11: band-shaped molded body 2, 12: front fitting portion 3, 13 ... rear fitting portion 4, 14 ... core member for keeping diameter expansion 5, 21, 24, 31 ... elastomer tubular body 7a: band-shaped molded body 7b: Left end of the band-shaped body 8a: Upper surface of the band-shaped body 8b: Lower surface of the band-shaped body 23: Cable termination connection part 25: Conductor connection terminal

Claims (8)

[Claims] 1. A belt-shaped molded body having a first fitting portion on one main surface of one side end and a second fitting portion on the other main surface of the other side end, respectively. The second fitting portion is fitted to the first fitting portion so that the second fitting portion overlaps with the first fitting portion, and the diameter is expanded around a cylindrical core member wound in a spiral shape. Forming an elastomeric tubular body containing a core member by attaching the elastomeric tubular body to the cylindrical core so that the first fitting portion comes forward in the traveling direction of the spiral. A step of covering around an adherend having a diameter smaller than the inner diameter of the member, pulling while rewinding the end of the band-shaped molded body constituting the forward end of the spiral of the tubular core member,
Removing the core member from the core member-containing elastomeric tubular body by sequentially unwinding, and attaching the elastomeric tubular body around the adherend. 2. The first fitting portion is an upward hook, and the second fitting portion is a downward hook.
The method described in. 3. The core member includes a small-diameter portion, a large-diameter portion, and a tapered portion connecting the small-diameter portion and the large-diameter portion, wherein the first fitting portion is located on the side of the small-diameter portion. Claim 1
The method described in. 4. The elastomeric tubular body comprises a widened portion mounted around the core member, and a non-diametered portion not mounted around the core member and having a smaller diameter than the widened portion. 2. The method according to claim 1, wherein the first fitting portion is on the non-diameter portion side. 5. A strip-shaped molded body having a first fitting portion on one main surface of one side end and a second fitting portion on the other main surface of the other side end, respectively. A cylindrical core member formed by fitting the second fitting portion to the first fitting portion so that the second fitting portion overlaps with the first fitting portion, and winding in a spiral shape; A large-diameter portion, and a tapered portion connecting the small-diameter portion and the large-diameter portion, wherein the first fitting portion is on the side of the small-diameter portion, and is a core member for retaining the expanded diameter of the elastomeric tubular body. 6. The hook according to claim 5, wherein the first fitting portion is a hook that faces upward, and the second fitting portion is a hook that faces downward.
The core member according to item 1. 7. A belt-shaped molded body having a first fitting portion on one main surface of one side end and a second fitting portion on the other main surface of the other side end, respectively. A cylindrical core member formed by fitting the second fitting portion to the first fitting portion so that the second fitting portion is superimposed thereon, and winding the tubular core member in a spiral shape; The elastomeric tubular body, a part of which is attached, wherein the elastomeric tubular body has an enlarged portion attached around the core member, and the enlarged diameter portion not attached around the core member. A core member-containing elastomer tubular body comprising a non-expanded portion having a diameter smaller than that of the non-expanded portion, wherein the first fitting portion is on the non-expanded portion side. 8. The hook according to claim 7, wherein the first fitting portion is an upward hook, and the second fitting portion is a downward hook.
3. The elastomer tubular body with a built-in core member according to item 1.