JP3725327B2 - Elastomer tubular body mounting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
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.
[0002]
[Prior art]
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 elastomer tubular body is attached to the adherend by covering the expanded tubular elastomer body with 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.
[0003]
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.
[0004]
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.
[0005]
[Problems to be solved by the invention]
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.
[0006]
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 the core member 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 a tapered portion having a different diameter, and the core member itself can be configured particularly when the taper is large. Absent.
[0007]
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.
[0008]
Another object of the present invention is to provide a core member for maintaining the diameter of an elastomer tubular body, which is 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.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a belt-like shape 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 molded body is formed by fitting the second fitting portion to the first fitting portion so that the second fitting portion is overlaid, and winding in a spiral shape. The first fitting portion is composed of a small portion, a large-diameter portion, and a tapered portion connecting the small-diameter portion and the large-diameter portion, and the first fitting portion is expanded around the cylindrical core member on the small-diameter portion side. The step of mounting the diameter-equipped elastomer tubular body to form the core member-embedded elastomer tubular body, the core member-embedded elastomer tubular body, and the cylinder so that the first fitting portion is in front of the spiral in the traveling direction Covering the periphery of an adherend having a diameter smaller than the inner diameter of the cylindrical core member; Pulling the end of the strip-shaped molded body constituting the front end of the direction of travel of the spiral while unwinding and sequentially unwinding, the core member is removed from the elastomer tubular body with a built-in core member, and the elastomer tubular body is And a method for attaching an elastomeric tubular body comprising a step of attaching around an adherend.
Further, the present invention provides a band-shaped molded article 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 second fitting portion is fitted to the first fitting portion so that the second fitting portion is overlapped with the second fitting portion, and an elastomeric tube is wound around a cylindrical core member wound in a spiral shape. The body is composed of an enlarged-diameter part that has been expanded and attached, and a non-expanded part that is not attached and has a smaller diameter than the enlarged-diameter part, and the first fitting part has the non-expanded part. A process of mounting the core member built-in elastomer tubular body so as to be on the diameter side, and the core member built-in elastomer tubular body with the tube so that the first fitting portion is in front of the spiral in the traveling direction. Covering the periphery of an adherend having a diameter smaller than the inner diameter of the cylindrical core member; The end of the belt-shaped molded body constituting the front end in the traveling direction is pulled while being unwound and sequentially unwound to remove the core member from the elastomer tubular body with a built-in core member, and the elastomer tubular body is covered with the covered tubular body. A method for attaching an elastomeric tubular body comprising a step of attaching around a kimono.
[0010]
Further, the present invention provides a band-shaped molded article 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, A cylindrical core member formed by spirally winding the second fitting portion on the first fitting portion so that the second fitting portion overlaps the first fitting portion. Part, a large diameter part, and a tapered part connecting these small diameter part and large diameter part, and the first fitting part is on the small diameter part side and constitutes the front end part of the spiral in the traveling direction Provided is a core member for maintaining an expanded diameter of an elastomeric tubular body, wherein an end portion of a belt-shaped molded body is unwound and unwound by pulling .
[0011]
Furthermore, the present invention provides a band-shaped molded article 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, A cylindrical core member formed by spirally winding the second fitting portion on the first fitting portion so that the second fitting portion overlaps the first fitting portion, and the core member An elastomeric tubular body, a part of which is attached, and the elastomeric tubular body has a diameter-expanded part attached around the core member, and is not attached around the core member, A non-expanded portion having a diameter smaller than that of the expanded portion, and the end of the belt-shaped molded body constituting the front end portion of the spiral in the advancing direction of the spiral while the first fitting portion is on the non-expanded portion side An elastomer tubular body with a built-in core member is provided, which is characterized by unwinding the tension winding while returning .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
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 the 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.
[0013]
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.
[0014]
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 wound in the direction of arrow A.
[0015]
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.
[0016]
The elastomeric tubular body can be composed of a rubber-like substance such as silicon rubber, ethylene / propylene rubber, chloroprene rubber and 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
[0017]
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.
[0018]
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.
[0019]
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.
[0020]
In this case, since the contraction 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, so that it does not collapse.
[0021]
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 connection terminal 25, the core member 24 must be pulled out toward the cable side. The member will not collapse.
[0022]
【The invention's effect】
As described above, according to the present invention, the first fitting portion is provided on one main surface of one side end portion, and the second fitting portion is provided on the other main surface of the other side end portion. The molded body is wound into a spiral shape by fitting the second fitting portion to the first fitting portion so that the second fitting portion is overlaid, that is, in a form that is difficult to unravel. Since the cylindrical core member is configured, it is possible to stably remove the core member from the adherend without naturally uncoating due to the shrinkage force of the elastomeric tubular body from the surroundings. I can do it.
Further, 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.
[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 elastomer tubular body, which is used in a method for mounting an elastomer tubular body according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view showing a core member for maintaining an expanded diameter of an elastomeric tubular body used in the method for mounting an elastomeric tubular body according to one aspect of the present invention.
3 is a cross-sectional view showing a state in which a core member shown in FIG. 2 is pulled from an end portion.
FIG. 4 is a partial cross-sectional view showing an elastomer tubular body with a built-in core member that expands from the middle according to another embodiment of the present invention.
FIG. 5 is a diagram showing a cable terminal connection portion using a core member having a different diameter according to still another aspect of the present invention.
FIG. 6 is a cross-sectional view showing a belt-like molded body constituting a core member for maintaining the 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 an expanded diameter of an elastomeric tubular body used in a conventional method for mounting an elastomeric tubular body.
FIG. 8 is a view showing the removal of the core member for expanding the diameter from the elastomer tubular body in the conventional method for mounting the elastomer tubular body.
FIG. 9 is a partial cross-sectional view showing a conventional elastomer tubular body with a built-in core member that expands in diameter from the middle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,11 ... Band-shaped molded object 2,12 ... Front part fitting part 3,13 ... Rear part fitting part 4,14 ... Core member 5,21,24,31 for diameter expansion holding | maintenance ... Elastomer tubular body 7a ... Band-shaped molded object The right end 7b of the band-shaped molded body The left end 8a of the band-shaped molded body The upper surface 8b of the band-shaped molded body 23 The lower surface 23 of the strip-shaped molded body 23

Claims (6)

A strip-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 first fitting portion The second fitting portion is formed by fitting the second fitting portion so that the second fitting portion overlaps and winding in a spiral shape. A tapered portion connecting a small portion and a large-diameter portion, and the first fitting portion is mounted with an expanded elastomer tubular body around a cylindrical core member on the small-diameter portion side. Forming a member-embedded elastomer tubular body, the core member-embedded elastomer tubular body having a diameter smaller than an inner diameter of the cylindrical core member so that the first fitting portion is in front of the spiral in the traveling direction; The process of covering the periphery of the adherend, the front end of the cylindrical core member in the traveling direction of the spiral is configured A step of removing the core member from the elastomer tubular body with a built-in core member and attaching the elastomer tubular body to the periphery of the adherend by pulling the end of the belt-shaped molded body to be unwound and unwinding sequentially. A method for mounting an elastomeric tubular body comprising: A strip-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 first fitting portion The second fitting portion is fitted so that the second fitting portion overlaps with the second fitting portion, and the diameter of the elastomer tubular body is expanded around a cylindrical core member wound in a spiral shape. And the first fitting portion is on the non-diameter-expanded portion side so as to be formed of a non-expanded portion having a smaller diameter than the enlarged-diameter portion. Attaching the core member-containing elastomer tubular body to the inner diameter of the cylindrical core member so that the first fitting portion is located in the forward direction of the spiral. A step of covering the periphery of an adherend having a small diameter, forward of the spiral direction of the cylindrical core member The core member is removed from the elastomer tubular body with a built-in core member by unwinding and pulling the end of the band-shaped molded body constituting the part, and the elastomer tubular body is mounted around the adherend. A method for mounting the elastomeric tubular body.   A strip-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 first fitting portion A cylindrical core member formed by spirally winding the second fitting portion so that the second fitting portion overlaps, and having a small diameter portion and a large diameter portion. And a tapered portion connecting the small diameter portion and the large diameter portion, and an end portion of a band-shaped molded body that forms the front end portion of the spiral in the traveling direction while the first fitting portion is on the small diameter portion side. A core member for expanding the diameter of an elastomeric tubular body, wherein the core member is unwound while being unwound.   The core member according to claim 3, wherein the first fitting portion is an upward hook, and the second fitting portion is a downward hook. A strip-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 first fitting portion A cylindrical core member formed by spirally winding the second fitting portion so that the second fitting portion overlaps with the second fitting portion;
Around the core member, an elastomeric tubular body, a part of which is attached,
The elastomeric tubular body is composed of a diameter-enlarged portion mounted around the core member and a non-diameter-enlarged portion that is not mounted around the core member and has a smaller diameter than the diameter-enlarged portion. The core member is characterized in that the first fitting portion is on the non-diameter-enlarged portion side and unwinds the tensile winding while rewinding the end portion of the band-shaped molded body constituting the front end portion in the spiral traveling direction. Built-in elastomer tubular body.   6. The core member built-in elastomer tubular body according to claim 5, wherein the first fitting portion is an upward hook, and the second fitting portion is a downward hook.

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