Protective cylinder, protective cylinder device, joint cover and piping cover device

Abstract

To provide a protective cylinder which is externally fitted to a piping material, and facilitates searching for a required cutoff line from a plurality kinds of cutoff lines attached to an external surface so as to constitute a piping route.SOLUTION: A protective cylinder 1 forms a piping route linearly extending along a longitudinal direction in the inside, and can be externally fitted to a linear piping material. The protective cylinder 1 is attached in an end part 13 with a cutoff line 11a for L shape, capable of constituting a substantially L-shaped piping route by connecting edge faces exposed by cutting off of the two protective cylinders 1 cut along the line, and a cutoff line 11b for T shape, capable of constituting a substantially T-shaped piping route by connecting edge faces exposed by cutting off of the three protective cylinders 1 cut along the line. The protective cylinder 1 is externally fitted to a pipe joint and covers after being cut off along a cutoff line 11. Due to that the plurality kinds of cutoff lines are concentratedly attached to a narrow range of the end part 13 of the protective cylinder 1, it is easy to search for the required cutoff line 11.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a protective tube, a protective tube device, a joint cover, and a pipe cover device that are fitted onto the outside of pipe joints or straight pipes of piping materials to provide protection. [Background technology]

[0002] In order to keep piping materials such as water supply pipes and hot water supply pipes warm, heat-insulating materials are fitted on the outside to cover them, and for drainage pipes, since collision sounds between the inner surface of the pipe and the drainage are likely to occur, especially at bends and junctions in the drainage pipe, sound-absorbing materials or sound-proofing materials are fitted on the outside to reduce leakage of drainage sounds from the drainage pipe. As a protective tube to cover these piping materials, a heat-insulating material for piping described in Patent Document 1 has been proposed. The heat-insulating material for piping described in Patent Document 1 is formed in a long cylindrical shape, and in order to be used in various parts such as bent parts and T-shaped parts of the pipe, cuts are provided at multiple locations on the outer surface according to the shape of each part of the pipe, and it can be cut along the cutting lines of the cuts. This heat-insulating material for piping can be fitted on the outside of a straight pipe as it is, and when it is to be attached to a bent part or T-shaped part of the pipe, it can be attached to the pipe by cutting and removing the heat-insulating material at the cuts and joining the cut end faces of adjacent heat-insulating materials. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 60-97495 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the piping insulation material described in Patent Document 1 is a long cylindrical body, and multiple notches that match the shape of each part of the piping material are formed in multiple locations and shifted in the longitudinal direction, making it time-consuming to find among the multiple notches that match the shape of each part of the piping material.

[0005] In addition, because the cut is made in the middle of the insulation material in the longitudinal direction, after cutting along the cut line and cutting into two pieces, a considerable length of material remains as material waste that is not used for piping materials such as pipe joints, etc. This resulted in increased component costs.

[0006] Furthermore, there are some piping materials in which straight pipes of different diameters are connected to the T-shaped portion, but this piping insulation material does not take into consideration a configuration that can accommodate T-shaped pipe joints of different diameters.

[0007] Therefore, the present invention aims to provide a protective tube, protective tube device, joint cover, and piping cover device that are fitted over and cover piping material, allow the required resection line to be easily found from multiple types of resection lines marked on the outer surface to form a piping path, reduce material loss that occurs after cutting along the resection line, and can be attached to T-shaped pipe joints of different diameters. [Means for solving the problem]

[0008] The protective tube of claim 1 has a piping path extending linearly along the longitudinal direction formed therein and can be fitted onto a linear piping material, An L-shaped resection line that can form a substantially L-shaped piping path by joining end surfaces of two protective tubes that are resected along the line and exposed by the resection; A T-shaped resection line that can form a substantially T-shaped piping path by joining end faces exposed by the resection of three protective tubes that have been resected along the line; is attached to the end.

[0009] In the protective tube of claim 2, in particular, the T-shaped cutting line is composed of an opposing side cutting line and an orthogonal side cutting line, Two protective tubes are joined together such that end surfaces exposed by the cutting along the opposing side cutting lines are arranged opposite each other in a straight line; a protective tube having an end surface exposed by the resection along the orthogonal side resection line, the end surface being arranged in a direction perpendicular to the arrangement direction of the two protective tubes arranged opposite to each other in a straight line and joined to a joint portion of the two protective tubes; The three protective tubes form an approximately T-shaped piping route.

[0010] In the protective tube of claim 3, particularly, a part of the opposing side cutting line is shared with a part of the L-shaped cutting line. This makes it possible to reduce the number of cutting lines that are shared among multiple lines that are embedded in a narrow area at the end of the protective tube, thereby alleviating the complicated state and allowing for a simpler wiring state. In the protective tube of claim 4, particularly, one of both ends is provided with an L-shaped cutting line and an opposite side cutting line, and the other end is provided with an orthogonal side cutting line. As a result, the multiple cutting lines are distributed to the left and right ends, making it possible to alleviate the complicated state of the cutting lines and achieve a simpler wiring state.

[0011] The protective tube of claim 5 has a piping path extending linearly along the longitudinal direction formed therein and can be fitted onto a linear piping material, An L-shaped resection line that can form a substantially L-shaped piping path by joining end surfaces of the two protective tubes that are resected along the line and exposed by the resection; An obtuse angle resection line is attached to the end portion, which can form a piping route that bends at an obtuse angle more obtuse than the approximately L-shaped piping route by joining the end faces exposed by the resection of the two protective tubes that have been resected along the line. This allows the protective tube to form a substantially L-shaped piping path, and also allows the protective tube to form a piping path that is bent at an angle more obtuse than the substantially L-shaped piping path.

[0012] The protective tube of claim 6 is particularly deformable in the radial direction. As a result, when the protective tube is pressed from the outer circumferential direction, it overlaps in the radial direction and deforms into a plate shape, making it easy to cut along the cutting line. In the protective tube of claim 7, in particular, the L-shaped cutting line and the T-shaped cutting line are provided at positions that are recessed from the tip of the end portion. This prevents the end surface exposed by cutting away the protective tube from being chipped or deformed even if the tip of the end of the protective tube made of felt or the like becomes frayed or chipped during transportation or storage.

[0013] The protective tube of claim 8 is particularly formed into a tube by rolling up a rectangular sheet body and connecting both longitudinal edges of the sheet body with connecting tape affixed along the longitudinal direction, and a non-connected portion of a predetermined length is formed on at least one of the two end portions. In the protective tube of claim 9, in particular, the non-connected portion is provided at the end portion having at least one of an L-shaped cutting line and a T-shaped cutting line, from the tip of the end portion to at least the position where the cutting line intersects with both end edges along the longitudinal direction. As a result, if the connecting tape is attached to the end of the protective tube, or if the non-connected portion is not formed from the tip of the end to the intersection of the resection line and the joining line, when starting to cut along the resection line with scissors or the like, it is necessary to first insert the scissors or the like so as to break through from the outside, but with the protective tube of claim 9, the scissors or the like can be inserted by separating the edges on both sides in the longitudinal direction at the non-connected portion, making it easy to start the cutting work. Also, there is no need to cut the connecting tape when cutting along the resection line.

[0014] The protective tube device of claim 10 has a piping path extending linearly along the longitudinal direction inside, and is composed of a large diameter protective tube that can be fitted onto a linear piping material having a relatively large diameter, and a small diameter protective tube that can be fitted onto a linear piping material having a relatively small diameter, The large diameter protective tube and the small diameter protective tube are each The L-shaped cutting line according to claim 1 and the T-shaped cutting line according to claims 1 and 2 are provided at the end portions, The end of the large diameter protective tube further has a small diameter opposing side cutting line for joining to the end face exposed by cutting along the orthogonal side cutting line described in claim 2 of the small diameter protective tube, in order to replace one protective tube arranged in the orthogonal direction described in claim 2 with a small diameter protective tube and form an approximately T-shaped piping path in which the straight piping section and the orthogonal piping section have different diameters. This allows the protective tube to form a piping path that corresponds to a T-shaped pipe joint of different diameters.

[0015] In the protective tube device of claim 11, in particular, the opposing side cutting line of the large diameter protective tube is made up of an inclined line that shares a part with a part of the L-shaped cutting line to form an inclined end surface inclined with respect to the longitudinal direction, and an orthogonal line that is perpendicular to the longitudinal direction, The small diameter opposing resection line is made up of a second inclined line sharing a part of the inclined line, and a second orthogonal line formed at a position shifted in the longitudinal direction from the orthogonal line. As a result, the second inclined line of the opposing side cutting line for small diameter is shared with part of the inclined line of the opposing side cutting line of the protective tube for large diameter, so that the number of cutting lines can be reduced by the amount that is shared, thereby alleviating the complicated state of the cutting lines and allowing for a simple wiring state.

[0016] The joint cover of claim 12 is a combination of a plurality of cylindrical units that are fitted around a pipe joint to cover it, An L-shaped resection line that can form a substantially L-shaped piping path by joining end surfaces exposed by the resection of the two units that are resected along the line; A T-shaped resection line that can form a substantially T-shaped piping path by joining end surfaces exposed by the resection of the three units that are resected along the line; are attached to both ends of the unit body when it is formed into a cylindrical shape, The end of the unit, which is tubular and fitted onto the pipe joint and joined to another unit, opposite the cut and joined side, has a length that prevents the pipe joint from protruding to the outside.

[0017] The pipe cover device of claim 13 comprises the joint cover of claim 12 and a straight cover that is cylindrical and fits over a straight pipe material to be connected to the pipe joint, The cylindrical joint cover is such that the unit body described in claim 12 can be externally fitted onto the end of the straight cover, and when the unit body is externally fitted, it can be in sliding contact with the pipe joint and the straight piping material. Effect of the Invention

[0018] In the present invention, since the resection lines are concentrated in a narrow area at the end of the protective tube, a plurality of resection lines can be visually recognized at once, and the resection line to be resected can be easily and quickly selected, without the trouble of searching.

[0019] In addition, since each cutting line is attached to the end of the protective tube, only a small portion of the cutting line is discarded after cutting, reducing material waste. This allows the straight portion of the protective tube attached to the piping material to be longer.

[0020] Furthermore, the protective tube devices of claims 10 and 11 can form a piping path that can accommodate T-shaped pipe joints of different diameters. [Brief description of the drawings]

[0021] [Figure 1] 1 is a front view showing a state in which a protective tube according to an embodiment of the present invention is attached to a piping material. [Diagram 2] 2A and 2B show the protective tube of FIG. 1, in which FIG. 2A is a perspective view and FIG. [Diagram 3] 3 is a plan view of a sheet member forming the protection tube of FIG. 2. [Figure 4] 3A and 3B show the cutting line of the protective tube in FIG. 2, where FIG. 3A is a plan view and FIG. [Diagram 5] 3 is a perspective view showing an end surface of the protection tube of FIG. 2 cut along a cutting line. [Figure 6] 1 is a perspective view of various pipe joints onto which a protective tube is fitted. FIG. [Figure 7]FIG. 11 is a front view showing a method of fitting the protective tube onto the elbow. [Figure 8] 13 is a front view illustrating another method of fitting the protective tube onto the elbow. FIG. [Figure 9] FIG. 11 is a front view showing the state in the middle of fitting the protective tube onto the large bend elbow. [Figure 10] FIG. 13 is a front view illustrating a method of fitting a protective tube onto an obtuse-angled elbow. [Figure 11] 13 is a front view showing a method of fitting the protective tube onto the cheese. FIG. [Figure 12] 1 is a front view showing a method of fitting a protective tube device of an embodiment of the present invention onto a tee of a different diameter. FIG. [Figure 13] 13A shows the cutting line of the protective tube in FIG. 12, where (a) is a plan view of the protective tube for a large diameter, (b) is a front view of the protective tube for a large diameter, and (c) is a front view of the protective tube for a small diameter. [Figure 14] 1 is a front view showing a method of fitting a joint cover of an embodiment of the present invention onto an elbow. FIG. [Figure 15] 15A and 15B show a joint cover unit of FIG. 14, in which FIG. 15A is a perspective view and FIG. [Figure 16] FIG. 2 is a front view of the pipe cover device according to the embodiment of the present invention. [Figure 17] 17 is a front view illustrating a method of fitting the pipe cover device of FIG. 16 onto an elbow. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] <Protective tube and protective tube device> First, a protective tube and a protective tube device according to an embodiment of the present invention will be described with reference to the drawings. In drainage pipelines, collision noise between the inner surface of the pipeline and the drainage is likely to occur, especially at bends, junctions, and branching points. The protective tube of this embodiment is intended to reduce leakage of drainage noise from the drainage pipeline, and is composed of a cylinder fitted onto the drainage pipeline. As shown in FIG. 1, the protective tube 1 covers the pipe joints 20 and also covers the straight pipe material 25, which is a straight portion of the drainage pipeline, in the pipe material provided with elbows 21 and tees 23 at bends and junctions of the drainage pipeline. The protective tube 1 generally covers the entire drainage pipeline, but it is sufficient to cover the straight portions to the extent that the drainage noise can be reduced, so the straight portions outside the range may not be covered.

[0023] As shown in FIG. 2, the protective tube 1 is formed of a long cylindrical tube that has a piping path extending linearly along the longitudinal direction inside and can be fitted onto a linear piping material 25. The protective tube 1 of this embodiment has a total length of about 1 m and is made of a tube in which a sound absorbing sheet and a sound insulating sheet are laminated in the thickness direction, specifically, a tube in which a 6 mm thick synthetic needle felt is covered with a 1 mm thick soft PVC sheet. The protective tube 1 can be formed into a tube from the beginning, but in this embodiment, it is formed by rolling up a rectangular flat sheet body 10 shown in FIG. 3, which is made by laminating these sheets, into a cylindrical shape. The protective tube 1 is not limited to the above length.

[0024] As shown in Fig. 4, the protective tube 1 has an L-shaped resection line 11a that can form an approximately L-shaped piping path bent at about 90 degrees by joining the end faces 12 exposed by the resection of two protective tubes 1 cut along a line, and a T-shaped resection line 11b that can form an approximately T-shaped piping path by joining the end faces 12 exposed by the resection of three protective tubes 1 cut along a line, at the end 13 in the longitudinal direction of the protective tube 1. Furthermore, as shown in Fig. 4, the protective tube 1 has an obtuse angle resection line 11f that can form a piping path bent at an angle of about 45 degrees, which is more obtuse than the approximately L-shaped piping path, at the end 13 in the longitudinal direction of the protective tube 1, by joining the end faces 12 exposed by the resection of two protective tubes 1 cut along a line.

[0025] The end faces 12 exposed by the resection along each resection line 11 are shown in Fig. 5. Fig. 5(a) shows the end face 12 resected along the L-shaped resection line 11a, Fig. 5(b) shows the end face 12 resected along the obtuse angle resection line 11f, and Fig. 5(c) shows the end face 12 resected along the T-shaped resection line 11b. Note that Fig. 4 only shows each resection line 11, with (a) being a plan view and (b) being a front view, both of which omit the illustration of the joint 14 and the connecting tape 16. Also, the resection line 11 shown in the front view of Fig. 4(b) is also provided on the back side of the protective tube 1 in a symmetrical position.

[0026] Here, the approximately L-shaped piping route is a route configured by being attached to an elbow 21, which is a pipe joint 20, at a bent portion of the approximately L-shaped piping material, and the approximately T-shaped piping route is a route configured by being attached to tees 23, 24, which are pipe joints 20, at a junction portion of the approximately T-shaped piping material. In the case of the drain pipe of this embodiment, the approximately L-shaped piping route is bent at an angle of 91 degrees with a drainage gradient. Also, the piping route that is bent at an angle of about 45 degrees, which is more obtuse than the approximately L-shaped piping route, is a route configured by being attached to an elbow 22, which is a pipe joint 20, at a bent portion of the piping material at an obtuse angle.

[0027] The protective tube 1 is formed by rolling up the sheet body 10 shown in Fig. 3 into a cylindrical shape, butting the edges 14a along the horizontal direction, which is the longitudinal direction of the upper and lower ends, along the longitudinal direction, and then attaching a connecting tape 16 such as an adhesive tape or a sticky tape along the longitudinal direction to the outer surface 15 of the joint 14 where the edges 14a on both sides are butted, as shown in Fig. 2. Here, release paper 17 is attached to the attachment surface side of both left and right ends in the longitudinal direction of the connecting tape 16, and a predetermined length of each end 13 of the protective tube 1 on the connecting tape 16 is simply placed on the outer surface 15 of the protective tube 1, and the edges 14a, 14a on both sides of the joint 14 are simply in contact to form non-connected portions 18. The release paper 17 is attached from the tip 13a of the end portion 13 to a position slightly beyond the intersection point p where the longitudinal joint line 14b formed on the outer surface 15 of the joint portion 14 intersects with the resection line 11, and the non-connected portion 18 is formed within this range.

[0028] When attaching the joint to a straight pipe without cutting along the cutting line 11, the release paper 17 is peeled off and the connecting tape 16 is applied to the outer surface 15 over the entire length of the joint 14 along the longitudinal direction.

[0029] The resection line 11 marked on the outer surface 15 of the protective tube 1 is a marking line indicating the area to be resected, and is formed by a line of perforations penetrating from the front to the back. Since the resection line 11 is formed by perforations, when resecting along the resection line 11, it is easy to use scissors, a cutter, or the like.

[0030] 4(b), various resection lines 11 are marked on the right end 13 of the protective tube 1, including an orthogonal line 11e shown by a dashed line at point A-I that is perpendicular to the axis of the protective tube 1, an inclined line shown by a solid line at point H-D that is inclined at 45 degrees to the orthogonal line 11e, and an inclined line shown by a broken line at point E-F that is inclined at 22.5 degrees to the orthogonal line 11e. On the left end 13 of the protective tube 1, an orthogonal side resection line 11d shown by a solid L-shaped line at point T-R is marked.

[0031] In each of the resection lines 11, the inclined line at point H-D constitutes an L-shaped resection line 11a that allows the construction of a piping route that is bent at an obtuse angle of 45 degrees, which is more obtuse than the L-shaped piping route. The two protective tubes 1 cut along the L-shaped resection line 11a are attached to the elbow 21 bent at about 90 degrees of the approximately L-shaped pipe joint 20 of FIG. 6(a). The two protective tubes 1 cut along the obtuse angle resection line 11f are attached to the elbow 22 of FIG. 6(b) that is bent at an obtuse angle of about 45 degrees, which is more obtuse than the elbow 21 bent at about 90 degrees. Each pipe joint 20 of FIG. 6 has a short cylindrical connection part 26 to which a straight pipe material 25 is connected, and the inner diameter of the connection part 26 is the same as the outer diameter of the straight pipe material 25.

[0032] In addition, in each of the resection lines 11, the orthogonal line 11e of point A-B, the inclined line 11g of point R-N, which is a part of the L-shaped inclined line 11a of point H-D, and the orthogonal side resection line 11d of point T-R-B form a T-shaped resection line 11b that can form an approximately T-shaped piping route, and among these, the orthogonal line 11e of point A-B and the inclined line 11g of point R-N further form the opposite side resection line 11c of the T-shaped resection line 11b. The opposite side resection line 11c of the T-shaped resection line 11b is shown by a dashed line. The two protective tubes 1 resected at the opposite side resection line 11c are attached to the main pipe side where two straight piping materials 25 are arranged linearly opposite each other in the tee 23 of the approximately T-shaped pipe joint 20. In addition, one protective tube 1 cut at the orthogonal side cutting line 11d of the point-T-shaped cutting line 11b is attached to the branch pipe side where one straight piping material 25 is arranged perpendicular to the main pipe in the Tee 23. These cutting lines 11 are shown in the development of the sheet body 10 in FIG.

[0033] Next, a method for fitting and covering the protective tube 1 thus constructed around pipe joints 20 at bends and junctions of the drainage pipe line, which is the piping route, and also around straight piping material 25 will be described.

[0034] First, to attach the protective tube 1 to the elbow 21 of the pipe joint 20, which is bent at about 90 degrees, scissors or the like are used to cut along the perforations of the L-shaped cutting line 11a on the end 13 of each of the two protective tubes 1. At this time, the non-connected portion 18 with length l from the tip 13a of the right end 13 to a point slightly beyond the intersection p of the joining line 14b and the cutting line 11, as shown in Figure 2(b), has release paper 17 attached, so the connecting tape 16 does not get in the way and can be cut along the cutting line 11 without any hindrance.

[0035] Next, as shown in FIG. 7(a), the two protective tubes 1 cut along the cutting lines 11 are fitted onto the straight pipe material 25 joined to both sides of the elbow 21 and slid toward the elbow 21 to be attached to the straight pipe material 25 and the elbow 21. Then, as shown in FIG. 7(b), the end faces 12 exposed by the cutting of the two protective tubes 1 are butted against each other, and then, as shown in FIG. 7(c), an adhesive tape 19 is affixed to the outer surface 15 of the abutting portion to join them. As a result, the entire elbow 21 is covered by the two protective tubes 1, and the straight pipe material 25 is also covered. The straight pipe material 25 is inserted into the connecting portion 26 of the elbow 21 by applying an adhesive to the outer surface of the end portion on the elbow 21 side and joined. However, the elbow 21 and the straight pipe material 25 may be joined by other means.

[0036] The protective tube 1 is attached so as to cover the entire straight piping material 25, but since the protective tube 1 is basically required to reduce leakage of drainage noise, the part where there is almost no leakage of drainage noise and is some distance away from the elbow 21, which is the source of the drainage noise, may be left exposed. Alternatively, after the protective tube 1 is attached, a separate sound-deadening sheet may be wrapped around and attached to the exposed part to cover the entire straight piping material 25.

[0037] Here, a non-connected portion 18 where no connecting tape 16 is attached is formed in a predetermined length portion from the tip 13a of the end 13 of the protective tube 1, and the non-connected portion 18 is formed from the tip 13a of the end 13 to a position slightly beyond the intersection p where the cutting line 11 and the joint line 14b of the edge 14a of the joint portion 14 along the longitudinal direction intersect, and is also formed from the tip 13a of the end 13 to a length exceeding the adhesive fixing allowance w of the straight piping material 25 adhesively fixed to the elbow 21. For this reason, the work of connecting and fixing the straight piping material 25 to the pipe joint 20, including the case of a tee or the like described later, and fitting the protective tube 1 over the pipe joint 20 and the straight piping material 25 to be attached can also be performed as follows.

[0038] As shown in FIG. 8(a), the protective tube 1 after cutting at the L-shaped cutting line 11a is fitted onto the straight pipe material 25 with the end of the cut end face 12 and the end face of the straight pipe material 25 on the pipe joint 20 side aligned at almost the same position in the longitudinal direction, and the edges 14a on both sides along the longitudinal direction at the non-connecting portion 18 of the end 13 opposite the elbow 21 of the pipe joint 20 are slightly expanded on both sides, and as shown in FIG. 8(b), the protective tube 1 is shifted to the right along the longitudinal direction, and the non-connecting portion 18 is overlapped so as to cover the end 13 of another protective tube 1 adjacent in the piping path. By shifting, the end of the straight pipe material 25 on the pipe joint 20 side protrudes and is exposed from the end 13 on the elbow 21 side of the protective tube 1. Here, the non-connecting portion 18 of the protective tube 1 is formed to a length exceeding the adhesive fixing allowance w of the straight pipe material 25. Therefore, adhesive is applied to the exposed outer surface of the end of the straight piping material 25 on the elbow 21 side, and the straight piping material 25 is inserted into the connection portion 26 of the elbow 21 to adhesively fix the straight piping material 25 and the elbow 21 together, as shown in Figure 8 (c).

[0039] Thereafter, as shown in Fig. 8(d), the protective tube 1 is slid toward the elbow 21 and fitted onto the elbow 21, releasing the overlapping state between the end 13 of the protective tube 1 opposite the elbow 21 and the end 13 of the adjacent other protective tube 1. Next, as shown in Fig. 8(e), the tip 13a of the end 13 of the protective tube 1 opposite the elbow 21 is abutted against the tip 13a of the end 13 of the adjacent other protective tube 1, and adhesive tape 19 is applied to the abutting portion of the tips 13a to fix them in place, as shown in Fig. 8(f). However, fixing the adhesive tape 19 is not essential.

[0040] Next, when attaching the protective tube 1 to a large bend elbow 21 with a large radius of curvature as shown in Figure 9, it can be attached in the same manner as the elbow 21 shown in Figure 6(a) described above, but since a portion of the cut-off end face 12 of the protective tube 1 rides on the inner curved surface of the elbow 21, the end face 12 is deformed into a further elongated elliptical shape.

[0041] Next, to attach the protective tube 1 to the elbow 22 of the pipe joint 20 bent at about 45 degrees as shown in FIG. 6(b), the two protective tubes 1 are cut along the perforations of the obtuse angle cutting line 11f to the point H attached to the end 13 of each of them. As in the case of the elbow 21 bent at about 90 degrees, as shown in FIG. 10(a), the two protective tubes 1 are fitted onto the straight pipe material 25 connected to both sides of the elbow 22, and then slid to fit onto the elbow 22 as well. Then, as shown in FIG. 10(b), the cut end faces 12 are butted together, and then, as shown in FIG. 10(c), adhesive tape 19 is applied to the outer surface 15 of the abutting portion to join them. When attaching to an elbow bent at an angle other than 45 degrees, the protective tube 1 may be used with the obtuse angle cutting line corresponding to the bending angle attached.

[0042] Next, a method for attaching the protective tube 1 to the tee of the pipe joint 20 will be described. When the tee is the tee 23 shown in Fig. 6(c) in which the three straight pipe materials 25 to be joined thereto all have the same diameter, first, each of the two protective tubes 1 is cut along the opposing side cutting line 11c, which is a part of the T-shaped cutting line 11b and is made up of the orthogonal line 11e of dots A-B and the inclined line 11g of dots R-D in Fig. 4, for each of the two protective tubes 1. Then, cut is made along the orthogonal side cutting line 11d, which is a part of the T-shaped cutting line 11b and is made up of the dogleg line of dots T-C-R attached to the end 13 of another protective tube 1.

[0043] After that, as shown in FIG. 11(a), the end faces 12 of the two protective tubes 1 cut and exposed at the opposing resection lines 11c of the T-shaped resection line 11b are arranged facing each other in a straight line and fitted onto the straight pipe material 25, and then the end faces 12 are moved from the opposite directions up and down and fitted onto the Tee 23. At the same time, the end face 12 of another protective tube 1 cut and exposed at the orthogonal resection line 11d of the T-shaped resection line 11b is moved toward the end faces 12 cut at the opposing resection lines 11c of the two protective tubes 1, and then fitted onto the Tee 23 from the straight pipe material 25, and then attached from the direction perpendicular to the arrangement direction of the two protective tubes 1 arranged facing each other in a straight line to cover them. The state after the three protective tubes 1 are attached is shown in FIG. 11(b). Next, as necessary, an adhesive tape 19 is attached to the outer surface 15 of the abutting portion where the end faces 12 of the protective tubes 1 are butted against each other, and joined. As a result, the entire tee 23 and the straight pipe material 25 are covered by the three protective tubes 1.

[0044] Next, a protective tube device will be described for the case where the tee is a different diameter tee 24 as shown in Fig. 6(d). In the different diameter tee 24, the three straight piping materials 25 to be joined have different diameters for the main pipe of the straight piping section and the branch pipe of the orthogonal piping section. To attach the protective tube 1 to the different diameter tee 24, a protective tube device 2 is used, which is composed of a large diameter protective tube 1a that can be fitted onto a straight piping material 25a having a relatively large diameter, and a small diameter protective tube 1b that can be fitted onto a straight piping material 25b having a relatively small diameter. As shown in Fig. 12, the different diameter tee 24 is joined to two main pipes in which the straight piping materials 25a having a relatively large diameter are arranged in a linear manner opposite each other, and one branch pipe in which the straight piping material 25b having a relatively small diameter is arranged in a direction perpendicular to the linear arrangement direction of the two main pipes.

[0045] To attach the protective tube 1 to the tee 24 of different diameters, two of the three protective tubes 1 fitted on the above-mentioned tee 23 are replaced with the protective tube 1a for large diameter, and one of the three protective tubes 1 is replaced with the protective tube 1b for small diameter, forming an approximately T-shaped piping path of different diameters inside. For this purpose, as shown in Fig. 13, the protective tube 1a for large diameter has a small diameter opposing side resection line 11h added to the resection line 11 of the protective tube 1 shown in Fig. 4, in order to join the end surface 12 exposed by resection along the orthogonal side resection line 11d of the T-shaped resection line 11b of the protective tube 1b for small diameter. In Fig. 13(b), the opposing side resection line 11h for small diameter is shown by a two-dot chain line and is composed of a second inclined line 11i of point L-II that shares a part of the inclined line 11g of point L-II, and a second orthogonal line 11j of point N-II formed at a position shifted in the longitudinal direction from the orthogonal line 11e of point A-II. 13(b) and (c), the resection lines 11a for L-shape, the inclined line 11g, and the second inclined line 11i are shown to be very slightly spaced apart from each other for the sake of explanation, but in reality, they are on the same line. This is the same for the resection line 11 in FIG. 4.

[0046] The small diameter protective tube 1b shown in Fig. 13(c) is smaller in diameter after winding by reducing the width of the sheet body 10 compared to the protective tube 1 shown in Fig. 4. When limited to this different diameter T-shaped tee 24, the cutting line 11 formed on the small diameter protective tube 1b can be such that only the orthogonal side cutting line 11d of the dot-torch T-shaped cutting line 11b is added to the left end 13 of the small diameter protective tube 1b as a whole.

[0047] First, each of the two large diameter protective tubes 1a is cut along the small diameter opposing side cutting line 11h shown by a two-dot chain line consisting of the second orthogonal line 11j of the dot null and the second inclined line 11i of the dot null marked on the end 13. Then, one small diameter protective tube 1b is cut along the orthogonal side cutting line 11d of the dot null marked on the end 13.

[0048] After that, as shown in FIG. 12(a), the two large diameter protective tubes 1a are arranged so that the end faces 12 exposed by cutting along the small diameter opposing side cutting line 11h are arranged in a straight line, and are brought close to each other from the opposite directions up and down, and are fitted and attached to the large diameter linear pipe material 25a and the tee 24. When the cut end faces 12 of the two large diameter protective tubes 1a are butted against each other, the ends 13 overlap each other slightly in terms of size. At the same time, for one small diameter protective tube 1b, the end face 12 exposed by cutting along the orthogonal side cutting line 11d of the T-shaped cutting line 11b is brought close to the end faces 12 cut along the second inclined line 11i of the two large diameter protective tubes 1a, and is fitted to the small diameter linear pipe material 25b and the tee 24, that is, it is moved from the direction perpendicular to the arrangement direction of the two large diameter protective tubes 1a arranged in a straight line. The state in which these three protective tubes 1 are attached is shown in FIG. 12(b). Thereafter, although not shown, the end faces 12 of the three protective tubes 1 exposed by the cutting are appropriately deformed as necessary, and adhesive tape 19 is applied to the outer surfaces 15 of the abutting parts to join them. As a result, the entire tee 24 of different diameters and the linear piping materials 25 of large and small diameters are covered by the protective tube device 2.

[0049] Next, the operation of the protective tube 1 and the protective tube device 2 configured as above will be described. Since the protective tube 1 has the resection lines 11 concentrated in a narrow range at the end 13, a plurality of resection lines 11 can be visually recognized at once, and the resection line 11 to be resected corresponding to each part of the piping can be easily and quickly selected, without the trouble of searching.

[0050] In addition, since each cutting line 11 is attached to the end 13 of the protective tube 1, only a small portion of the cutting lines 11 is discarded after cutting, reducing material loss. As a result, the straight portion of the protective tube 1 that is attached to the piping material can be made longer.

[0051] Furthermore, the opposing side resection line 11c shares a part of the resection line 11 with a part of the L-shaped resection line 11a, and the second inclined line 11i of the opposing side resection line 11h for small diameter of the large diameter protective tube 1a shares a part of the inclined line 11g with the resection line 11. Therefore, the number of resection lines 11 that are embedded in a narrow range of the end 13 of the protective tube 1 can be reduced by the amount of sharing, so that the complicated state can be alleviated and a simple wiring state can be achieved. Then, as shown in FIG. 4, the L-shaped resection line 11a and the opposing side resection line 11c are attached to the right end 13 of one of the two end portions 13, 13, and the orthogonal side resection line 11d is attached to the left end 13 of the other end portion. Therefore, the multiple resection lines 11 are attached in a distributed manner to the left and right end portions 13, so that the complicated state of the resection lines 11 can be alleviated and a simple wiring state can be achieved.

[0052] In addition, the protective tube 1 is deformable in the radial direction, so that when the protective tube 1 is pressed from the outer periphery direction, the outer surface 15 overlaps in the radial direction and deforms into a plate shape, making it easy to cut along the cutting line 11.

[0053] In addition, the L-shaped cutting line 11a and the T-shaped cutting line 11b are placed at a position recessed from the tip 13a of the end 13 of the protective tube 1, and the point closest to the tip 13a is slightly separated from this.Therefore, even if the tip 13a of the protective tube 1, which is made of felt or the like, becomes frayed, chipped, and deformed during transportation or storage, the end face 12 cut off by the cutting line 11 is prevented from chipping or deforming, and the end faces 12 of the two protective tubes 1 can be closely fitted to each other after being fitted onto the pipe fitting 20.

[0054] Furthermore, a non-connected portion 18 of a predetermined length is formed at both ends 13, 13, and the non-connected portion 18 is formed from the tip 13a of the end 13 to at least the intersection p of the resection line 11 and the joint line 14b where the end edges 14a on both sides along the longitudinal direction abut. For this reason, if the connecting tape 16 is attached to the tip 13a of the end 13, or if the non-connected portion 18 is not formed from the tip 13a of the end 13 to the intersection p of the resection line 11 and the joint line 14b, when starting to cut along the resection line 11, it is necessary to insert scissors into the resection line 11 so as to break through the connecting tape 16 from the outside, but the protective tube 1 of this embodiment can insert scissors by separating the end edges 14a on both sides at the non-connected portion 18, making it easy to start the cutting operation. In addition, when cutting along the resection line 11, it is not necessary to cut the connecting tape 16.

[0055] In addition, as described in Patent Document 1, a cut is provided in the middle of the protective tube in the longitudinal direction, and if it is cut at this position, it is difficult to predict the amount and number of protective tubes required for the entire piping route, including the straight piping material 25. For this reason, protective tubes may be prepared in vain or insufficient. However, in the protective tube 1 of this embodiment, the end 13 is used as a joint with other protective tubes 1, and the joint is an intersection with a bent part or a junction of the piping route, and each protective tube 1 is arranged based on the intersection, so that the amount and number of protective tubes 1 required is easy to predict. In addition, since the straight part between the intersections in the protective tube 1 can be made long, it is easy to adjust the length required for the protective tube 1.

[0056] <Joint cover> Next, a joint cover according to an embodiment of the present invention will be described. The aforementioned protective tube 1 and protective tube device 2 are long and are fitted over and cover both the pipe fitting 20 and the straight piping material 25, whereas the fitting cover of this embodiment is short and is fitted over and covers only the pipe fitting 20.

[0057] In FIG. 14(b), the joint cover 3 is a combination of a plurality of cylindrical units 4, two in this embodiment, which are fitted over the elbow 21 of the pipe joint 20 to cover it. In FIG. 14, an elbow 21 is shown as an example of the pipe joint 20, but a tee 23 or the like may be used. As shown in FIG. 15, the unit 4 is formed of a short cylindrical tube, and has a piping path extending linearly along the longitudinal direction, similar to the protective tube 1, inside, and is formed by laminating sound absorbing sheets and sound insulating sheets in the thickness direction. The unit 4 is formed by rolling up a rectangular flat sheet 10, similar to that shown in FIG. 3, which is formed by laminating these sheets, into a cylindrical shape. However, the horizontal dimension of this sheet 10, which is the longitudinal direction, is considerably smaller than that of the protective tube 1, and in this embodiment, the total length is about 15 cm. However, the length is not limited to this length. The unit 4 can also be formed into a tube from the beginning.

[0058] In Figure 15, the unit body 4 has L-shaped resection lines 11a, which can be used to form a substantially L-shaped piping route by joining the end faces 12 exposed by the resection of two unit bodies 4 cut along a line, T-shaped resection lines 11b, which can be used to form a substantially T-shaped piping route by joining the end faces 12 exposed by the resection of three unit bodies 4 cut along a line, and obtuse angle resection lines 11f, which can be used to form a piping route that bends at an angle of 45 degrees, which is more obtuse than the substantially L-shaped piping route.

[0059] The joint cover 3 has a length that prevents the elbow 21 from protruding outward from the end 13 opposite the cut and joined side when the unit 4 is fitted over the elbow 21 of the pipe joint 20 and joined to another unit 4. In other words, the joint cover 3 covers the entire elbow 21 so that it is not exposed to the outside.

[0060] To attach the joint cover 3 to the elbow 21, similarly to the case of attaching the protective tube 1, the two units 4 are cut along the L-shaped cutting line 11a marked on the end 13. Thereafter, as shown in Fig. 14(a), the two units 4 are fitted onto the straight piping material 25 connected to both sides of the elbow 21, and attached to the straight piping material 25 and the elbow 21 while sliding. Then, as shown in Fig. 14(b), the cut end faces 12 of the two units 4 are butted against each other, and although not shown, adhesive tape 19 is applied to the outer surface 15 of that portion to join them if necessary.

[0061] In this joint cover 3, similar to the protective tube 1 and the protective tube device 2, each resection line 11 is attached to the end 13 of the unit body 4, so that the portion of the resection line 11 that is unused and discarded after resection is small, thereby reducing material waste.

[0062] The joint cover 3 only needs to cover the pipe joint 20, which is the source of the drainage sound, and may not cover the straight piping material 25 joined to the pipe joint 20. However, as with the piping cover device described below, a separate straight cover may also be fitted over the straight piping material 25 to cover it as well.

[0063] <Pipe cover device> Next, a pipe cover device according to an embodiment of the present invention will be described. 16, the pipe cover device 5 is composed of the aforementioned joint cover 3 which is fitted only around the pipe joint 20 to cover it, and a straight cover 6 which is formed in a cylindrical shape and fitted around a straight pipe material 25 connected to the pipe joint 20 to cover it. In the pipe cover device 5, a part of the cylindrical unit body 4 of the joint cover 3 can be fitted around an end portion 6a of the straight cover 6, and in the fitted state can be in sliding contact with the pipe joint 20 and the straight pipe material 25. Here, the straight cover 6 may be cylindrical and can be fitted around the straight pipe material 25 only by moving it in the axial direction, or it may be a sheet body which can be rolled up and fitted around.

[0064] To attach the pipe cover device 5 to the elbow 21 and the straight pipe material 25 of the pipe joint 20, as shown in FIG. 17(a), the unit body 4 and the straight cover 6 of the joint cover 3 are fitted to the straight pipe material 25, and then slid to fit the end 13 of the unit body 4 to the end 6a of the straight cover 6, as shown in FIG. 17(b). In this state, as shown in FIG. 17(c), the end of the straight pipe material 25 is adhesively fixed to the connection part 26 of the elbow 21. Then, as shown in FIG. 17(d), the unit body 4 and the straight cover 6 are slid together toward the elbow 21 to fit the elbow 21 and the straight pipe material 25. Thereafter, as shown in FIG. 16, the cut end faces 12 of the two unit bodies 4 are butted against each other, and an adhesive tape 19 is attached to the outer surface 15 of the abutting part as necessary to join them. The pipe joint 20 may be something other than the elbow 21.

[0065] Since the piping cover device 5 is composed of a joint cover 3 and a straight cover 6 as separate bodies, in a piping route having straight piping material 25 of any length, the joint cover 3 can be commonly used, and for the straight piping material 25, only the length of the straight cover 6 needs to be adjusted.

[0066] <Modification> Incidentally, in the above embodiment, the unit 4 of the protective tube 1 and the joint cover 3 is attached by rolling up the sheet body 10 into a cylindrical shape, cutting it along the cutting line 11, fitting it around the straight piping material 25, and sliding it towards the pipe joint 20. However, the sheet body 10 may also be cut along the cutting line 11 in an unfolded state, and the cut sheet body 10 may then be rolled around the straight piping material 25 and fitted therearound, and slid towards the pipe joint 20. The protective tube and unit body in the claims also include such a sheet-like material that is fitted around to form a cylindrical shape.

[0067] In addition, in the above embodiment, each resection line 11 of the protective tube 1 etc. is arranged in the pattern shown in Figure 4 etc., but when implementing the present invention, it is not limited to this arrangement pattern, and the type and number of resection lines 11 are not limited to this.

[0068] Furthermore, although the multiple cutting lines 11 in the above embodiment are provided distributed on both end portions 13 of the protection tube 1, they may be provided on only one of the end portions 13.

[0069] In addition, in the above embodiment, the protective tube 1 and the unit body 4 of the joint cover 3 are fitted over and cover a plurality of protective tubes 1 and unit bodies 4 around the pipe joint 20 or the straight piping material 25. However, in cases where the straight piping material 25 is relatively short, for example, an L-shaped cutting line 11a may be provided on the left end 13 of the protective tube 1 in Figure 4, and the protective tube 1 may be divided into two pieces approximately at the middle of its length, and cut along the L-shaped cutting line 11a on each of the left and right ends 13, thereby dividing one protective tube 1 into two pieces of approximately the same shape, and these two divided protective tubes 1 may be used to form an approximately L-shaped piping route.

[0070] Furthermore, the unit body 4 of the protective tube 1 and the joint cover 3 has the L-shaped cutting line 11a and the T-shaped cutting line 11b placed at a position away from the tip 13a of the end portion 13, but if the end portion 13 is not likely to become deformed by fraying or chipping during transportation or storage, the L-shaped cutting line 11a and the T-shaped cutting line 11b may be placed in contact with the tip 13a of the end portion 13.

[0071] Each resection line 11 may be marked with letters, symbols, or other indications to facilitate visual identification of the type of resection line 11, the attachment location, and the like.

[0072] In addition, the protective tube 1 and the unit body 4 of the joint cover 3 are formed by laminating sound absorbing sheets and sound insulating sheets made of synthetic needle felt and soft PVC in the thickness direction, but are not limited to this and may be formed of only one layer of sound absorbing sheet, etc., or may be formed of materials other than these. Also, the protective tube 1 and the unit body 4 do not have to be formed into a cylindrical shape by rolling the sheet body 10, but may be directly formed into a cylindrical shape by extrusion molding, etc.

[0073] In the above-described embodiments, the cutting line 11 is formed by a perforation penetrating from the front to the back, but it may be formed by simply drawing a line on the outer surface 15 of the protection tube 1 .

[0074] In addition, the non-connected points 18 of the end 13 of the protective tube 1 are formed on both end parts 13, but they may be formed on only one of the end parts 13, or may not be formed on either end part 13.

[0075] The protective tube 1 and the joint cover 3 in the above embodiment are fitted onto the outside of the pipe joints 20 such as elbows 21, 22 and tees 23, 24, but they can also be fitted onto the outside of and cover pipe joints 20 such as headers in which multiple branch pipes branch off from a main pipe. In such cases, the number of protective tubes 1, etc. constituting the piping path is not limited to two or three.

[0076] The protective tube 1, joint cover 3, etc. in the above embodiment are fitted onto the drainage pipeline to reduce leakage of drainage noise from the drainage pipeline, but the protective tube, joint cover, etc. of the present invention are not limited to this and can be similarly applied to those that are attached for insulation, heat retention, waterproofing, etc. [Explanation of symbols]

[0077] 1: protective tube, 1a: protective tube for large diameter, 1b: protective tube for small diameter, 2: protective tube device, 3: joint cover, 4: unit body, 5: piping cover device, 6: straight cover, 10: sheet body, 11: cutting line, 11a: cutting line for L-shape, 11b: cutting line for T-shape, 11c: opposite side cutting line, 11d: orthogonal side cutting line, 11e: orthogonal line, 11f: cutting line for obtuse angle, 11g: inclined line, 11h: opposite side cutting line for small diameter, 11i: 2 inclined line, 11j: second orthogonal line, 12: end face, 13: end portion, 13a: tip, 14a: edge, 16: connecting tape, 18: non-connected portion, 20: pipe fitting, 21: elbow, 22: obtuse angle elbow, 23: tee, 24: differing diameter tee, 25: straight piping material, 25a: large diameter straight piping material, 25b: small diameter straight piping material, l: length of non-connected portion, p: intersection of resection line and joining line.

Claims

1. A protective tube having a piping path extending linearly along a longitudinal direction therein and capable of being fitted onto a linear piping material, An L-shaped resection line that can form a substantially L-shaped piping path by joining end surfaces of the two protective tubes that are resected along the line and exposed by the resection; A T-shaped resection line that can form a substantially T-shaped piping path by joining end surfaces exposed by the resection of the three protective tubes that are resected along the line; A protective tube characterized in that it has an end portion attached thereto.

2. The T-shaped resection line comprises an opposing resection line and an orthogonal resection line; The two protective tubes are joined together such that the end surfaces exposed by the cutting along the opposing side cutting lines are arranged opposite each other in a straight line; one protective tube, the end surface of which is exposed by the resection along the orthogonal side resection line, is disposed in a direction perpendicular to the arrangement direction of the two protective tubes which are linearly opposed to each other and is joined to a joint portion of the two protective tubes; 2. The protective tube according to claim 1, wherein the approximately T-shaped piping path is formed by three of the protective tubes.

3. 3. The protective tube according to claim 2, wherein a part of the opposing side cutting line is shared with a part of the L-shaped cutting line.

4. 4. The protective tube according to claim 3, wherein the L-shaped cutting line and the opposite side cutting line are provided on one of both end portions, and the orthogonal side cutting line is provided on the other end portion.

5. A protective tube having a piping path extending linearly along a longitudinal direction therein and capable of being fitted onto a linear piping material, An L-shaped resection line that can form a substantially L-shaped piping path by joining end surfaces of the two protective tubes that are resected along the line and exposed by the resection; an obtuse angle resection line that can form a piping path that is bent at an obtuse angle more obtuse than the substantially L-shaped piping path by joining end surfaces exposed by the resection of the two protective tubes that have been resected along the line; A protective tube characterized in that it has an end portion attached thereto.

6. 6. The protective tube according to claim 1, which is deformable in a radial direction.

7. 6. The protective tube according to claim 1, wherein the L-shaped cutting line and the T-shaped cutting line are provided at positions spaced apart from the tips of the end portions.

8. A rectangular sheet body is rolled up and both ends along the longitudinal direction are connected by a connecting tape affixed along the longitudinal direction to form a cylindrical shape, 6. The protective tube according to claim 1, wherein at least one of the ends is provided with a non-connected portion of a predetermined length.

9. The protective tube described in claim 8, characterized in that the non-connected portion is provided at the end portion to which at least one of the L-shaped cutting line and the T-shaped cutting line is attached, from the tip of the end portion to at least the position where the cutting line intersects with both end edges along the longitudinal direction.

10. A protective tube device is provided that includes a large diameter protective tube that can be fitted around a linear piping material having a relatively large diameter and a small diameter protective tube that can be fitted around a linear piping material having a relatively small diameter, and that has a piping path extending linearly along a longitudinal direction, The large diameter protective tube and the small diameter protective tube are each The L-shaped cutting line according to claim 1 and the T-shaped cutting line according to claims 1 and 2 are attached to the end portion, A protective tube device characterized in that the end of the large diameter protective tube is further provided with a small diameter opposing side cutting line for joining to the end face exposed by cutting along the orthogonal side cutting line described in claim 2 of the small diameter protective tube, in order to replace one protective tube arranged in the orthogonal direction described in claim 2 with the small diameter protective tube to form an approximately T-shaped piping path in which the straight piping portion and the orthogonal piping portion have different diameters.

11. The opposing side resection line of the large diameter protective tube according to claim 2 comprises an inclined line that shares a portion with the L-shaped resection line to form an inclined end surface inclined with respect to the longitudinal direction, and an orthogonal line perpendicular to the longitudinal direction, The protective tube device according to claim 10, characterized in that the small diameter opposing side resection line comprises a second inclined line sharing a portion of the inclined line, and a second orthogonal line formed at a position shifted longitudinally from the orthogonal line.

12. A joint cover is a combination of a plurality of cylindrical units that is fitted around a pipe joint to cover it, An L-shaped resection line that can form a substantially L-shaped piping path by joining end surfaces exposed by the resection of the two units that are resected along the line; a T-shaped resection line that can form a substantially T-shaped piping path by joining end surfaces exposed by the resection of the three units that are resected along the line; are attached to both ends of the unit body when it is formed into a cylindrical shape, A joint cover characterized in that the end of the unit, which is tubular and fitted around the pipe joint and joined to another unit, opposite the cut and joined side, has a length such that the pipe joint does not protrude to the outside.

13. The joint cover according to claim 12 and a straight cover that is cylindrical and fits over a straight pipe material to be connected to the pipe joint, The tubular joint cover is characterized in that the unit body described in claim 12 can be externally fitted onto the end of the straight cover, and that when the unit body is externally fitted, it can be in sliding contact with the pipe joint and the straight piping material.

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