JP4118287B2 - Elastomer tubular body mounting method - Google Patents

Description

  The present invention relates to a method for mounting an elastomer tubular body, a core member for maintaining the diameter of the elastomer tubular body, and an elastomer tubular body with a built-in core member.

  Conventionally, an elastomeric tubular body is attached to a terminal connection portion or a straight connection portion of a power cable for insulation, airtightness, and mechanical protection. The attachment of the elastomer tubular body to the adherend is performed by covering the expanded elastomer tubular body on the expanded diameter holding core member, holding the elastomer tubular body in the expanded state, and then placing the core member on the adherend. And finally, the core member is removed.

  As shown in FIG. 6, the core member for expanding the diameter is formed of a band-shaped molded body 1 having a cross section having a front fitting portion 2 and a rear fitting portion 3, and a front fitting portion 2 as shown in FIG. 7. And the rear fitting part 3, and a cylindrical body 4 that is spirally wound in the direction of arrow A. The cylindrical body 4 is stored, transported, and used in a state in which the expanded elastomer tubular body is covered on the outer periphery, that is, as an elastomer tubular body with a built-in core member.

  Removal of the tubular body 4 constituting the expanded diameter holding core member from the elastomeric tubular body is performed as shown in FIG. That is, the strip-shaped formed body 1 at the end of the tubular body 4 is pulled from the gap between the tubular body 4 and the adherend (not shown) while being rewound in the direction of arrow B to unwind. Is made by In FIG. 8, reference numeral 31 indicates an elastomeric tubular body.

  However, as shown in FIG. 7, such a conventional core member for expanding the diameter of the conventional art has a problem that the engagement is naturally unwound at the front end in the mounting direction due to the shrinkage force of the elastomeric tubular body from the surroundings. There is. In particular, as shown in FIG. 9, when the diameter of the elastomeric tubular body 5 is enlarged from the middle, the shrinkage force of the elastomeric tubular body 5 acts strongly on the enlarged diameter portion, and the core member 4 is broken.

  In addition, for example, in the terminal connection portion of the cable, when the conductor connection terminal is integrated with the elastomer tubular body, a core member having a different diameter may be used. However, such a core member may be disposed on the conductor connection terminal side. Since it cannot be pulled out, it is necessary to pull it out to the cable sheath side. At that time, the core member tends to collapse at the tapered portion having a different diameter, and the core member itself can be configured especially when the taper is large. Absent.

  An object of the present invention is to provide a method for mounting an elastomeric tubular body that makes it possible to stably hold the expanded diameter of the elastomeric tubular body without causing the core member to collapse.

  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. Still another object of the present invention is to provide an elastomeric tubular body incorporating such a core member.

In order to solve the above-described problem, the present invention provides a first fitting portion 12 on one main surface 8a of one side end portion 7a and a second fitting on the other main surface 8b of the other side end portion 7b. The strip-shaped molded body 11 having the respective portions 13 is fitted into the first fitting portion 12 so that the second fitting portion 13 is overlaid with the second fitting portion 13 overlying the spiral shape. A cylindrical core member 14 wound around the cylindrical core member 14, and an elastomeric tubular body mounted in an expanded state around the cylindrical core member 14, and the first fitting portion of the cylindrical core member 14 A non-fitted strip-shaped molded body 11 extends from the front end portion where 12 is located, and this is drawn out to the rear end through the cylindrical core member 14. provide.
In such an elastomer tubular body with a built-in core member, the front end portion where the first fitting portion 12 of the tubular core member 14 is located is in an intermediate portion in the length direction of the elastomer tubular body, and the elastomer tubular body is in the middle. The diameter can be increased.
The present invention also includes a step of covering the above-mentioned elastomer tubular body with a built-in core member around an adherend having a diameter smaller than the inner diameter of the cylindrical core member, from the front end to the rear end of the cylindrical core member The elastomeric tubular body is removed from the elastomeric tubular body with a built-in core member by pulling the strip-shaped molded body drawn out to the winding and sequentially unwinding, thereby removing the core member from the elastomeric tubular body containing the core member. And attaching the body to the periphery of the adherend, an end side of the tubular core member 14 on the side where the first fitting portion 12 of the band-shaped molded body 11 is located. It provides a method of mounting an elastomeric tubular body characterized by unwinding the belt-like molded body 11 from.

According to the present invention, the belt-shaped molded body having a first fitting portion on one main surface of one side end portion and a second fitting portion on the other main surface of the other side end portion, the one of the fitting portion and the second fitting part, previously superimposed as the second fitting portion is at the top, cylindrical in towards the first fitting portion of the band shaped body is located Since the band-shaped molded body is unwound from the end side of the core member, that is, because it is fitted in a shape that is difficult to unravel, due to the shrinkage force of the elastomeric tubular body from the surroundings, the meshing does not unravel naturally, The removal of the core member from the adherend can be performed stably. In addition, it is possible to obtain a core member having a different diameter, which has been difficult in the past, and to manufacture a partially expanded elastomer tubular body.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a core member for maintaining a 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 portion (right end portion) 7a. 12. A rear fitting portion (second fitting portion) 13 is provided on the other main surface (lower surface) 8b of the other side end portion (left end portion) 7b.

  As shown in FIG. 2, the belt-shaped molded body 11 is wound in a spiral shape in the direction of arrow A by meshing the front fitting portion 12 and the rear fitting portion 13, and the core member for expanding the diameter. 14 is formed. The strip-shaped molded body 11 is usually made of a synthetic resin such as polypropylene or polyethylene.

  The strip-shaped molded body 11 used for the core member 14 shown in FIG. 2 is different from the strip-shaped molded body 1 used for the conventional core member 4 shown in FIG. 7 by comparing FIG. 1 and FIG. The front fitting part and the rear fitting part are the same except that they are upside down. That is, in FIG. 2, the front fitting portion 12 is an upward hook and the rear fitting portion 13 is a downward hook, whereas in FIG. 7, the front fitting portion 2 is a downward hook and the rear portion. The fitting portion 3 is an upward hook, and the front fitting portion 2 is wound so as to be located in the forward direction of the spiral when the spiral is wound in the arrow A direction.

  The core member 14 is covered with an 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 attached. Attached to the body.

  The elastomeric tubular body can be composed of a rubber-like substance such as silicon rubber, ethylene / propylene rubber, chloroprene rubber, or the like. In addition, as the adherend, there are a cable end connection portion and a straight connection portion, and a gas and liquid pipe connection portion, and an elastomeric tubular body is attached for insulation, waterproofing, airtightness, and mechanical protection. The

  As shown in FIG. 8, the core member 14 is removed from the elastomer tubular body 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 in the direction of arrow B. It is made by unwinding and unwinding by pulling while rewinding. At that time, as shown in FIG. 3, at the front end portion of the core member 14, the downward rear fitting portion 13 of the last turn and the upward front fitting portion 12 of the previous turn are strip-shaped. The end of the molded body 11 is meshed with a shape that is difficult to unwind.

  Therefore, at the front end portion in the mounting direction, the mesh member is not naturally unwound by the shrinkage force of the elastomer tubular body from the surroundings, and the core member 14 can be stably removed from the adherend. It is.

  FIG. 4 shows another embodiment of the present invention, and shows a case where the diameter of the elastomer tubular body is partially expanded but not all. The core member 14 is the same as that shown in FIG. That is, in FIG. 4, the diameter of the elastomer tubular body 21 up to a middle portion 22 is expanded and held by the core member 14.

  In this case, since the shrinkage force of the elastomer tubular body acts strongly on the end portion of the core member 14, the conventional core member easily collapses as shown in FIG. 9, but in the core member 14 according to the present invention, the elastomer tubular body Even if the contraction force acts strongly on the end portion of the core member 14, the engagement of the fitting portion is difficult to unravel, and therefore does not collapse.

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

Sectional drawing which shows the strip | belt-shaped molded object which comprises the core member for diameter expansion holding | maintenance of an elastomer tubular body used for the mounting method of the elastomer tubular body which concerns on 1 aspect of this invention. The fragmentary sectional view which shows the core member for diameter expansion holding | maintenance of an elastomer tubular body used for the mounting method of the elastomer tubular body which concerns on 1 aspect of this invention. Sectional drawing which shows the state by which the core member shown in FIG. 2 is pulled from an edge part. The fragmentary sectional view which shows the core member built-in elastomer tubular body which expands from the middle based on the other aspect of this invention. The figure which shows the termination | terminus connection part of the cable using the core member of a different diameter based on the further another aspect of this invention. Sectional drawing which shows the strip | belt-shaped molded object which comprises the core member for diameter expansion holding | maintenance of an elastomer tubular body used for the mounting method of the conventional elastomer tubular body. The fragmentary sectional view which shows the core member for diameter expansion holding | maintenance of an elastomer tubular body used for the mounting method of the conventional elastomer tubular body. The figure which shows the removal of the core member for diameter expansion holding | maintenance from the elastomer tubular body in the mounting method of the conventional elastomer tubular body. The fragmentary sectional view which shows the conventional core member built-in elastomer tubular body which expands in diameter from the middle.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,11 ... Strip-shaped molded object, 2,12 ... Front part fitting part, 3,13 ... Rear part fitting part, 4,14 ... Core member for diameter expansion holding, 5, 21, 24, 31 ... Elastomeric tubular body, 7a: right end of the strip-shaped molded body, 7b: left end of the strip-shaped molded body, 8a: upper surface of the strip-shaped molded body, 8b: bottom surface of the strip-shaped molded body, 23 ... end connection portion of the cable, 25 ... conductor connecting terminal.

Claims (3)

A strip-shaped molded body 11 having a first fitting portion 12 on one main surface 8a of one side end portion 7a and a second fitting portion 13 on the other main surface 8b of the other side end portion 7b, A cylindrical core member 14 formed by spirally winding the second fitting portion 13 on the first fitting portion 12 so that the second fitting portion 13 is overlaid on the first fitting portion 12; ,
The cylindrical core member 14 is composed of an elastomeric tubular body mounted in an expanded state,
A non-fitted strip-shaped molded body 11 extends from the front end portion where the first fitting portion 12 of the cylindrical core member 14 is located, and this is drawn out to the rear end through the cylindrical core member 14. An elastomer tubular body with a built-in core member . 2. The elastomer tubular body with a built-in core member according to claim 1, wherein a front end portion where the first fitting portion 12 of the tubular core member 14 is located is at an intermediate portion in a length direction of the elastomer tubular body, and the elastomer tubular core member internal elastomeric tubular body characterized in that the body is enlarged in the middle. A step of covering the elastomer tubular body with a built-in core member according to claim 1 around an adherend having a diameter smaller than an inner diameter of the cylindrical core member, and pulled out from the front end portion of the cylindrical core member to a rear end. The core member is removed from the elastomer tubular body with a built-in core member by pulling the belt-shaped formed body and sequentially unwinding, thereby removing the core member from the elastomer tubular body containing the core member. A method of attaching an elastomeric tubular body comprising a step of attaching around the adherend, and a belt-like shape from the end of the tubular core member 14 on the side where the first fitting portion 12 of the belt-like molded body 11 is located. A method for attaching an elastomeric tubular body, comprising unwinding the molded body 11 .

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