Measure tool

Abstract

To provide a measure tool which can reliably block a gap even if the gap is formed between elongated bodies.SOLUTION: A measure tool is used in a partition penetration structure in which a partition through hole 3 is formed at a partition body 2 of a building and multiple elongated bodies 1A, 1B are inserted into the partition penetration hole 3. The measure tool includes: a sleeve member 4 which may be inserted into the partition penetration hole 3 and has a cylindrical shape; a cylindrical cover member 5 which extends in an axial outward direction relative to the sleeve member 4 and may decrease its diameter relative to the elongated bodies 1A, 1B inserted into the sleeve member 4; and a heat expansion material 42 disposed on an inner surface of the sleeve member 4. In the cover member 5, multiple slits are formed spaced apart from each other in a circumferential direction at a tip in an axial direction. An area between the slits located adjacent to each other in the circumferential direction forms a blocking piece 56 having a tongue piece form.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a measure tool used in a partition-through structure in which partition through-holes are formed in partition bodies such as floors and walls provided in partition parts of a building, and a long member is inserted through the partition through-holes.

[0002] Conventionally, a sleeve is fixed to a through-hole formed in a partition body provided in a partition part of a building, and a pipe, which is an example of a long member as a medium, is inserted into the fixed sleeve. Subsequently, after installing a sheet-shaped molded body made of a thermally expandable material inside the sleeve, one end of the sleeve is sealed by attaching a sealing member across the outer surface of the sleeve and the outer surface of the pipe (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the sealing member of Patent Document 1 described above, when there are a plurality of the pipes (long members), there are often a plurality of pipes having different diameters, so it is difficult to conform to the outer peripheral surface of the pipes so that the gaps serving as valleys generated between the pipes disappear. Therefore, the gaps between the pipes cannot be sufficiently sealed, the fire resistance performance deteriorates, and early improvement is desired.

[0005] In view of the above situation, the present invention aims to provide a measure tool that can surely block even if there are gaps between long members.

Means for Solving the Problems

[0006] The present invention provides a device for use in a partition penetration structure in which a partition penetration hole is formed in the partition body of a building, and at least one elongated body is inserted through the partition penetration hole, and the device comprises a cylindrical sleeve member that can be inserted into the partition penetration hole, a cylindrical cover member that extends axially outward from the sleeve member and can be reduced in diameter relative to the elongated body through which the sleeve member is inserted, and a thermal expansion material disposed on the inner surface of the sleeve member, wherein the cover member has a plurality of notches formed at its axial tip at intervals in the circumferential direction, and the space between adjacent notches in the circumferential direction is a tongue-shaped closing piece.

[0007] According to the present invention, when the cover member is reduced in diameter relative to the elongated body and covers the elongated body, the tongue-shaped closing piece enters into the gap that is created between the elongated bodies. This ensures that the gap between the elongated bodies is reliably closed by the tongue-shaped closing piece.

[0008] Furthermore, the cutting tool of the present invention may include oblique cuttings that intersect with the axial direction.

[0009] As described above, because the cut includes an oblique cut that intersects the axial direction, the portion of the closing piece corresponding to the oblique cut becomes oblique in shape that intersects the axial direction, making it easier for the closing piece to fit into the gap between elongated bodies.

[0010] Furthermore, as a tool of the present invention, the notch may include a straight notch along the axial direction on the tip side of the oblique notch.

[0011] As described above, because the cut includes both an oblique cut and a straight cut along the axial direction at the tip of the oblique cut, the portion of the closing piece corresponding to the oblique cut becomes oblique in shape, while the portion corresponding to the straight cut at the tip becomes straight along the axial direction. As a result, the closing piece fits into the gap between the elongated bodies and reliably closes the gap between them.

[0012] Furthermore, as a device of the present invention, the tip of the cover member may be provided with a shape-retaining means for maintaining its reduced diameter shape.

[0013] As described above, the tip of the cover member is provided with a shape-retaining means that maintains its reduced diameter shape, making it easier for the tip of the cover member to maintain its reduced diameter shape and for the tongue-shaped closing piece to maintain its position in the gap between the elongated bodies.

[0014] Furthermore, in the present invention, the shape-retaining means may be formed by overlapping the tip portions of the cover member.

[0015] As described above, the shape-retaining means is formed by creating an overlapping structure at the tip of the cover member, thereby improving the shape-retaining performance of the tip of the cover member. This makes it easier for the tongue-shaped closing piece to maintain its position in the gap between the elongated bodies.

[0016] Furthermore, in the present invention, the shape-retaining means may be provided with a wire at the tip of the cover member that maintains the reduced diameter shape.

[0017] As described above, by providing a wire that maintains the reduced diameter shape at the tip of the cover member, the shape retention performance of the tip of the cover member can be improved.

[0018] Furthermore, in the device of the present invention, the cover member may not be adhered to the elongated body.

[0019] When a long object expands or contracts due to thermal expansion or contraction, if the cover member is not adhered to the long object, it is easier for the tongue-shaped closing piece to maintain a position where it is inserted into the gap between the long objects, while allowing the expansion or contraction of the long object. [Effects of the Invention]

[0020] According to the present invention, since the spaces between adjacent notches in the circumferential direction are tongue-shaped closing pieces, it is possible to provide a device that can reliably close gaps between elongated bodies.

Brief Description of the Drawings

[0021] [Figure 1] It is a side view of a partition penetration structure to which the measures of the present invention are attached. [Figure 2] It is a longitudinal side view of the partition penetration structure. [Figure 3] It is a front view of the partition penetration structure shown in FIG. 1 as seen from the right. [Figure 4] It is a perspective view with the tip of the cover member of the measure omitted. [Figure 5] It is a perspective view of the tip of the cover member of the measure. [Figure 6] The cover member of the measure is shown, (a) shows the state before the tip is folded back at the folding part, and (b) shows the state after the tip is folded back at the folding part. [Figure 7] Another form of the cover member with a different shape of the cut formed in the cover member of FIG. 6 is shown, (a) shows the state before the tip is folded back at the folding part, and (b) shows the state after the tip is folded back at the folding part. [Figure 8] It is a side view of a partition penetration structure to which the measure provided with the cover member shown in FIG. 7 is attached.

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments of the measures used in the partition penetration structure of the present invention will be described based on the drawings.

[0023] In the partition penetration structure, a partition through-hole is formed in a floor or a wall, which is a partition provided in a partition part of a building, and a long member is inserted through the partition through-hole. A gap has occurred between the inserted long member and the partition through-hole, and measures are used to eliminate this gap. In this embodiment, the wall will be described as an example.

[0024] As shown in Figures 1 to 3, the device H comprises a cylindrical sleeve member 4 that is fitted around three elongated pipes 1A, 1B, and 1C of different sizes and is designed to be inserted into circular partition through-holes 3 formed in the wall (partition) 2, and a cylindrical cover member 5 that extends axially outward from the sleeve member 4 and can reduce the diameter of multiple (three in Figure 3) pipes 1A, 1B, and 1C through which the sleeve member 4 is inserted. Insulation materials 6A and 6B are wrapped around two of the pipes 1A and 1B. Examples of the elongated pipes include refrigerant pipes, heat transfer pipes, hot water pipes, water supply pipes, drainage pipes, hydraulic pipes, gas pipes, electrical conduits, electrical wires (power lines and signal lines), cables, etc. The wall 2 is composed of two walls 2A and 2B that are spaced apart in the axial direction and have a hollow interior.

[0025] The sleeve member 4 comprises a sleeve body 41 formed into a cylindrical shape by rolling a thin metal (for example, steel) plate into a ring shape, a thermal expansion material 42 attached to the inner surface 41A of the sleeve body 41, and a gap-concealing portion 43 attached to the outer surface 41B of one axial end (right end in Figure 2) of the sleeve body 41. Therefore, the sleeve body 41 can be made to be inserted into the partition through-hole 3 by rolling it so that its outer diameter corresponds to the inner diameter of the partition through-hole 3. After inserting the sleeve body 41 into the partition through-hole 3, the reduced diameter of the sleeve body 41 expands outward due to its elastic restoring force, pressing the sleeve body 41 against the partition through-hole 3 so that no gap is created between the sleeve body 41 and the partition through-hole 3, thereby shielding the sleeve body 41 from the partition through-hole 3.

[0026] Furthermore, the sleeve body 41 has a circumferential dimension perpendicular to the axial direction that is larger than the diameter of the partitioned through-hole 3, and an axial dimension that is longer than the axial dimension of the partitioned through-hole 3. In addition, as shown in Figure 4, the sleeve body 41 has two rows of elongated holes 41a, 41b formed at intervals along the entire circumference near the approximate axial center of the thermal expansion material 42 attached to the sleeve body 41. These two rows of elongated holes 41a, 41b are formed parallel to each other and arranged in a staggered pattern, and their lengths are set so that one elongated hole 41a (upper side in Figure 4) and the other elongated hole 41b (lower side in Figure 4) that are adjacent in the circumferential direction overlap in the axial direction. In other words, elongated holes 41a or 41b are present in every part of the sleeve body 41 in the circumferential direction. Therefore, when the thermal expansion material 42 expands, a portion of the thermal expansion material 42 bulges out to the outside of the sleeve body 41 through the elongated holes 41a and 41b, filling the gap between the through-hole 3 in the wall 2 and the outer surface of the sleeve body 41.

[0027] The thermal expansion material 42 has dimensions in the circumferential direction that are perpendicular to the axial direction of the sleeve body 41, and dimensions that are in the axial direction from one end to the other end. Therefore, when the sleeve body 41 is inserted into the partition through hole 3, both the axial end and the axial end of the thermal expansion material 42 protrude outward from the partition through hole 3 in the axial direction. In this embodiment, the thermal expansion material 42 has dimensions that are in the axial direction from one end to the other end of the sleeve body 41, but it may also have dimensions that are shorter than the entire axial direction.

[0028] Furthermore, the thermal expansion material 42 is a component that possesses both thermal expandability (the property of increasing in volume when heated) and fire resistance (the property of being able to withstand heat and having a high melting point, making it difficult to burn). As the thermal expansion material 42, any known material can be used without particular limitation, for example, a putty-like material (thermal expansion putty-like fire-resistant material) can be used. In addition, when the thermal expansion material 42 is heated to a predetermined temperature (for example, 180°C) or higher, it expands in its thickness direction and fills the gap between the outer surfaces of the pipes 1A, 1B, and 1C (the outer surfaces 1a and 1b of the insulation materials 6A and 6B for the two pipes 1A and 1B, and the outer surface 1c of the remaining pipe 1C) and the inner surface 41A of the sleeve body 41, thereby preventing flames generated on one side of the compartment penetration hole 3 from moving to the other side of the compartment penetration hole 3. In this way, by including the thermal expansion material 42 in the sleeve member 4, the sleeve member 4 becomes thermally expandable.

[0029] The gap-concealing portion 43 is made of a resilient, deformable strip-shaped elastic member such as sponge, soft rubber, or foamed polyurethane, and is used to conceal the gap between the through-hole 3 and the outer surface of the sleeve body 41. However, when the sleeve body 41 is inserted into the partitioned through-hole 3, it also functions as a stopper to position the sleeve body 41 within the partitioned through-hole 3 by contacting the wall surface 2a of one of the walls 2A that constitutes the partitioned through-hole 3.

[0030] Furthermore, the gap-concealing portion 43 is attached to the outer surface of one axial end of the sleeve body 41 with adhesive. It is attached to the outer surface of the sleeve body 41 in such a way that it can maintain its reduced diameter state when the sleeve body 41 is reduced in diameter. Specifically, as shown in Figure 4, one end of the gap-concealing portion 43 has an extension portion 43A that extends circumferentially outward from one end of the sleeve body 41, and the gap-concealing portion 43 is attached to the sleeve body 41 such that the other end of the gap-concealing portion 43 is located closer to the one end than the other end of the sleeve body 41. Therefore, when the sleeve body 41 is reduced in diameter to an outer diameter that can be inserted into the partition through-hole 3, the reduced diameter state of the sleeve body 41 can be maintained by attaching the extension portion 43A of the gap-concealing portion 43 to the outer surface of the other end of the sleeve body 41. Furthermore, an adhesive (not shown) is applied to the inner surface of the extension portion 43A, and this adhesive is covered with release paper (not shown). When attaching the extension portion 43A to the outer surface of the other end of the sleeve body 41, the extension portion 43A is cut to adjust its circumferential length so that no gap occurs between the tip of the extension portion 43A of the gap-concealing portion 43 and the other end of the gap-concealing portion 43. After removing the release paper, the extension portion 43A of the gap-concealing portion 43 is attached to the outer surface of the other end of the sleeve body 41, thereby maintaining the reduced diameter of the sleeve body 41 and forming an uninterrupted annular gap-concealing portion 43 (see Figure 3).

[0031] The cover member 5 comprises, for example, a cover body 51 made of a single flame-retardant aluminum glass cloth, a cover-side thermal expansion material 52 provided on the inner surface of the tip end of the cover body 51, a shape-retaining means 53 positioned further forward than the cover-side thermal expansion material 52 to maintain the tip end in a reduced diameter shape, and a foam material 54 that fixes the shape-retaining means 53 to the inner surface of the cover body 51 and fills the gap between the pipes 1A, 1B, 1C and the inner surface 51A of the cover body 51.

[0032] As shown in Figure 1, multiple notches 55 are formed at the axial end of the cover body 51 at circumferential intervals, so that the spaces between adjacent notches 55, 55 in the circumferential direction are configured as tongue-shaped closing pieces 56. The base end of the cover body 51 is attached to the outer surface of one axial end of the sleeve body 41 with adhesive over the entire circumferential direction. The circumferential end of the cover body 51 is provided with an extension portion 51B that extends circumferentially outward from the circumferential end of the sleeve body 41. Therefore, when the sleeve body 41 is rolled into a ring shape and its diameter is reduced, the extension portion 51B is attached with adhesive to the outer surface 51C of the other circumferential end of the cover body 51 so that no gap occurs in the overlapping portion of the cover body 51. Adhesive (not shown) is applied to the inner surface 51b of the extension portion 51B, and release paper (not shown) is attached. The release paper is peeled off when attaching the extension portion 51B to the outer surface of the other circumferential end of the sleeve body 41.

[0033] Each notch 55 is provided with an oblique notch 55A that intersects with the axial direction and a straight notch 55B that follows the axial direction on the tip side of the oblique notch 55A. More specifically, as shown in Figure 6(a), a straight notch 55B that is twice the length along the axial direction and oblique notches 55A, 55A that intersect with the axial direction are formed from each of the axial ends of the straight notch 55B, and by folding it back at the folded portion 55C (see dotted line) at half the length of the twice-length straight notch 55B, a superimposed structure consisting of two closing pieces 56, 56 is formed (see Figure 6(b)). By making the tip of the cover body 51 a superimposed structure in this way, the shape-retaining means 53 that maintains the reduced diameter shape when the tip of the cover body 51 is reduced in diameter is formed. In this way, because the notch 55 includes an oblique notch 55A and a straight notch 55B on the tip side of the oblique notch 55A, the part of the closing piece 56 corresponding to the oblique notch 55A has an oblique shape, while the part of the closing piece 56 corresponding to the straight notch 55B on the tip side has a straight shape along the axial direction. As a result, the closing piece 56 fits into the gap S (three locations in Figure 3) between the pipes 1A, 1B, and 1C, and reliably closes the gap S between the pipes 1A, 1B, and 1C. This prevents a decrease in fire resistance. In addition, since the straight notch 55B starts from the tip 55T of the cover body 51, even if the worker folds it back at the folded-back section 55C (see dotted line) with some misalignment, the misalignment is not only less noticeable, but also, since no sharp angle is created with respect to the tip 55T, the tip 55T is less likely to become sharp or frayed.

[0034] The cover-side thermal expansion material 52 is composed of a strip-shaped body having dimensions that extend across the entire circumferential region of the cover body 51, and is made of the same material as the thermal expansion material 42. As described above, when heated to a predetermined temperature (e.g., 180°C) or higher, the cover-side thermal expansion material 52 expands in its thickness direction to fill the gap between the outer surfaces of the pipes 1A, 1B, and 1C and the inner surface 51A of the cover body 51, thereby preventing flames generated on one side of the compartment through-hole 3 from moving to the other side of the compartment through-hole 3.

[0035] The shape-retaining means 53 consists of a metal wire 53A, which acts as a wire to maintain the reduced diameter state of the tip of the cover body 51. As mentioned above, this wire 53A is fixed to the inner surface of the tip of the cover body 51 with foam material 54, and is formed in an annular shape when the sleeve body 41 is reduced in diameter (rolled up), thereby improving the shape-retaining performance of the tip of the cover body 51. In addition, by providing the wire 53A, the tip of the cover body 51 is more likely to maintain its reduced diameter shape, and the tongue-shaped closing piece 56 is more likely to maintain its position in the gap S between the pipes 1A, 1B, and 1C. In this embodiment, both the wire (wire 53A) and the overlapping structure of the tip of the cover body 51 are used as shape-retaining means 53, but it may also be implemented by providing only one of them.

[0036] The foam material 54 is composed of, for example, a single strip of sponge, but may also be composed of a resiliently deformable strip of elastic material such as soft rubber or foamed polyurethane. When the cover body 51 is reduced in diameter, the foam material 54 fills the gap between the pipes 1A, 1B, 1C and the inner surface 51A of the cover body 51.

[0037] The procedure for attaching the device H configured as described above to the partition penetration hole 3 to cover the gap S between pipes 1A, 1B, and 1C will be explained below.

[0038] First, prepare the device shown in Figures 4 and 5. Roll up the sleeve body 41 of the device and adjust it to a size that can be inserted into the partition through-hole 3. After adjustment, attach the extended portion 43A (see Figure 4) of the gap-concealing portion 43 to the outer surface 41B of the other end of the sleeve body 41 to maintain the reduced diameter state of the sleeve body 41. Next, attach the extended portion 51B (see Figures 4 and 5) of the cover body 51 to the outer surface 51C (see Figures 4 and 5) of the other end in the circumferential direction of the cover body 51. After this, insert the cylindrical sleeve body 41 into the partition through-hole 3 from the base end side opposite to the cover member 5 side. During this insertion, the gap-concealing portion 43 of the sleeve body 41 comes into contact with the wall surface 2a of one wall 2A of the partition through-hole 3. This completes the insertion of the sleeve body 41 into the partition through-hole 3.

[0039] Next, the pipes 1A, 1B, and 1C are inserted into the device H, and then the tip of the cover body 51 is reduced in diameter so that the inner surface 51A of the cover body 51 comes into contact with the outer surfaces 1a, 1b, and 1c of the pipes 1A, 1B, and 1C (see Figure 1). At this time, the closing piece 56 can enter into the gaps S between adjacent pipes 1B, 1C and 1C, 1A of different diameters in the radial direction, as well as between 1B, 1A and 1C, 1A, and between 1B, 1A, thereby reliably closing the gaps S (see Figure 3). In the present invention, since the cover body 51 is not adhered to the pipes 1A, 1B, and 1C, even if the pipes 1A, 1B, and 1C expand or contract due to thermal expansion or contraction, the cover body 51 can easily maintain the position in which the tongue-shaped closing piece 56 is inserted into the gaps S between the pipes 1B, 1C and 1C, 1A, and between 1B, 1A, while allowing the expansion or contraction of the pipes 1A, 1B, and 1C.

[0040] Furthermore, the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0041] In the above embodiment, a separate cover member 5 was attached to the sleeve member 4, but the sleeve member 4 and the cover member 5 may also be made from a single integrated member.

[0042] Furthermore, in the above embodiment, the cover body 51 is not adhered to the pipes 1A, 1B, and 1C, but the cover body 51 may be adhered to the pipes 1A, 1B, and 1C with an adhesive, or the cover body 51 may be fixed to the pipes 1A, 1B, and 1C using adhesive tape or bands.

[0043] Furthermore, in the above embodiment, the notch 55 is composed of an oblique notch 55A and a straight notch 55B at the tip of the oblique notch 55A, but the notch 55 may also be composed of only the oblique notch 55A. More specifically, as shown in Figure 7(a), a V-shaped notch 55 is formed by two oblique notches 55A, 55A intersecting the axial direction, and the vertices of these two oblique notches 55A, 55A are folded back at the folded portion 55C (see dotted line) to form an overlapping structure consisting of two closing pieces 56, 56 (see Figure 7(b)). By making the tip of the cover body 51 an overlapping structure in this way, the shape-retaining means 53 (see Figure 8) that maintains the reduced diameter shape when the tip of the cover body 51 is reduced in diameter is formed. In this way, because the notch 55 has an oblique cut 55A extending from the tip 55T of the cover body 51, the portion of the sealing piece 56 corresponding to the oblique cut 55A has an oblique shape that intersects in the axial direction, making it easy for the sealing piece 56 to fit into the gaps S between pipes 1B, 1C and 1C, 1A, and between 1B, 1A. This prevents a decrease in fire resistance performance.

[0044] Furthermore, although the partition through-hole 3 was circular in the above embodiment, it may also be rectangular, elliptical, or polygonal. In this case, a fitting would be manufactured with a shape that matches the shape of the partition through-hole 3.

[0045] Furthermore, in the above embodiment, the tip of the cover body 51 is made of a layered structure consisting of two closing pieces 56, 56, but it may also be made of a layered structure consisting of any number of closing pieces, three or more, or it may be made of a single closing piece without layering. Also, the layered structure is not limited to a folded structure. For example, multiple pieces can be sewn together or glued together to form a layered structure.

[0046] Furthermore, in the above embodiment, the fastener H was attached to the partition through-hole 3 before the pipes 1A, 1B, and 1C were inserted into the fastener H. However, the fastener H may also be attached to the partition through-hole 3 after the pipes 1A, 1B, and 1C have been inserted into the partition through-hole 3.

[0047] Furthermore, in the above embodiment, the partition was composed of a wall 2 with partition through-holes 3 formed in the horizontal direction, but it may also be composed of a floor with partition through-holes formed in the vertical direction.

[0048] Furthermore, in the above embodiment, the cylindrical sleeve member 4 was constructed by rolling a thin plate-like body into a ring shape, but a sleeve member formed in a cylindrical shape may also be used. In this case, it is preferable to construct a sleeve member equipped with a mechanism that allows adjustment of the outer diameter. Alternatively, a C-shaped sleeve member may also be used. [Explanation of symbols]

[0049] 1A, 1B, 1C...Piping (long section), 1a, 1b, 1c...Outer surface, 2, 2A, 2B...Wall (compartment), 2a...Wall surface, 3...Compartment penetration hole, 4...Sleeve member, 5...Cover member, 6A, 6B...Insulation material, 41...Sleeve body, 41A...Inner surface, 41B...Outer surface, 41a, 41b...Slotted hole, 42...Thermal expansion material, 43...Gap concealing part, 43A...Extension part, 51...Cover body, 51A...Inner surface, 51B...Extension part, 51C...Outer surface, 51b...Inner surface, 52...Cover side thermal expansion material, 53...Shape retention means, 53A...Wire (wire material), 54...Foam material, 55...Notch, 55A...Diagonal notch, 55B...Straight notch, 55C...Folded part, 55T...Tip, 56...Closing piece, H...Measuring device, S...Gap

Claims

1. A device used in a partition penetration structure in which a partition through-hole is formed in a partition of a building and at least one long member is inserted through the partition through-hole, which is composed of a single member integrally formed with a cylindrical sleeve portion that can be inserted into the partition through-hole and a cylindrical cover portion that extends axially outward with respect to the sleeve portion and can be reduced in diameter with respect to the long member passing through the sleeve portion, wherein a plurality of cuts are formed at intervals in the circumferential direction at the axial tip of the cover portion, and a shape-retaining means for retaining the reduced-diameter shape is provided at the tip of the cover portion.

2. A device used in a partition penetration structure in which a partition through-hole is formed in a partition of a building and at least one long member is inserted through the partition through-hole, comprising a cover portion that can be reduced in diameter with respect to the long member surrounding the long member, wherein a plurality of cuts are formed at intervals in the circumferential direction at the axial tip of the cover portion, and a shape-retaining means for retaining the reduced-diameter shape is provided at the tip of the cover portion.

3. A device used in a partition penetration structure in which a partition through-hole is formed in a partition of a building and at least one long member is inserted through the partition through-hole, comprising a cover portion that can be reduced in diameter with respect to the long member surrounding the long member, wherein a plurality of cuts are formed at intervals in the circumferential direction at the axial tip of the cover portion, and the space between adjacent cuts in the circumferential direction forms a tongue-shaped closing piece. The cuts include an oblique cut intersecting the axial direction and a straight cut along the axial direction on the tip side of the oblique cut, and a shape-retaining means for retaining the reduced-diameter shape is provided at the tip of the cover portion, and the shape-retaining means is formed by making the tip of the cover portion into a laminated structure.

4. The device according to any one of Claims 1 to 3, wherein the cover portion is provided with a foaming material for filling the gap between the long member and the cover portion.

5. The device according to any one of Claims 1 to 3, wherein a thermally expandable material is provided on the inner surface of the tip side of the cover portion.

6. The device according to any one of Claims 1 to 3, wherein a thermally expandable material and a foaming material are provided on the inner surface of the tip side of the cover portion, and the foaming material is disposed on the tip side of the thermally expandable material.

7. The cutting notch according to claim 1 or 2, characterized in that it includes an oblique cutting notch intersecting the axial direction.

Images