JP2019027577A - Pipe joint cover and branch pipe cover - Google Patents

Abstract

To provide a pipe joint cover that can properly coat a pipe joint without leaving an exposure of a main pipe part in a base end part of a branch pipe part.SOLUTION: A pipe joint cover includes: a main pipe cover fitted to a main pipe part of a pipe joint; and a branch pipe cover 14 fitted to a branch pipe part. The branch pipe cover has a length corresponding to an outer peripheral length of the branch pipe part with a predetermined size and is formed into a curved-belt shape to be a substantially circular truncated cone shape where a base end side of the branch pipe part has a larger-diameter when being wound around an outside surface of the branch pipe part.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a pipe joint cover and a branch pipe cover, and more particularly to, for example, a pipe joint cover and a branch pipe cover covering an outer surface of a pipe joint having a main pipe portion and a branch pipe portion.

  Conventionally, a cover is attached to a pipe joint such as a collecting pipe used for a water supply / drainage pipe for the purpose of sound insulation and heat insulation. For example, Patent Document 1 discloses an example of a conventional pipe joint cover.

The sound insulation cover for a collecting pipe (pipe joint cover) of Patent Document 1 is attached to an upper cover (main cover) that is attached to the outer surface of the main pipe portion of the collecting pipe and an outer surface of the branch pipe portion of the collecting pipe. A branch pipe connection cover (branch pipe cover). The upper cover has a cutting position indicating mark (cutting guide portion) for forming an insertion portion for revealing an insertion portion through which the branch pipe portion can be inserted by a cutting operation. This cutting position indication mark is constituted by a plurality of types of annular cutting position indication lines having different external dimensions. On the other hand, the branch pipe connection portion cover is formed in a horizontally-long rectangular strip shape, and a posture holding frame body made of sheet metal is provided therein.
JP 2010-236688 A

  In the technique of Patent Document 1, when the upper cover is mounted on the main pipe portion of the pipe joint, the insertion portion is formed by performing a cutting operation on the cutting position indication mark for forming the insertion portion at the construction site. However, this cutting operation is not easy, and the shape of the insertion portion may be distorted due to an operation mistake, or a large insertion portion may be formed by mistaken cutting position indicating lines. In such a case, when the upper cover is attached to the main pipe part, there is a large gap between the inner peripheral surface of the insertion part and the outer peripheral surface of the branch pipe part, that is, in the base end part of the branch pipe part. Even if the pipe part is exposed to a large extent and the cover for a branch pipe connection part is attached to the branch pipe part, the main pipe part may remain exposed. For example, if the thickness of the sound absorbing layer (glass wool felt) of the branch pipe connecting part cover is increased, it is possible to cover the exposure of the main pipe part, but this increases the amount of members and the exposure of the sound absorbing layer. It grows and looks bad.

  Therefore, the main object of the present invention is to provide a novel pipe joint cover and branch pipe cover.

  Another object of the present invention is to provide a pipe joint cover and a branch pipe cover that can appropriately cover the pipe joint without leaving the main pipe part exposed at the proximal end portion of the branch pipe part. .

  1st invention is a pipe joint cover which coat | covers the outer surface of the pipe joint which has a main pipe part and a branch pipe part, Comprising: The main pipe cover with which the outer surface of a main pipe part is mounted | worn except a branch pipe part And a branch pipe cover that is wound around and attached to the outer side surface of the branch pipe part. The branch pipe cover has a length corresponding to the outer peripheral length of the branch pipe part of a predetermined size, and the outer side surface of the branch pipe part This is a pipe joint cover that is formed in a curved band shape in which the proximal end side of the branch pipe portion has a large diameter truncated cone shape when wound around.

  In the first invention, the pipe joint cover includes a main pipe cover and a branch pipe cover, and covers an outer surface of the pipe joint having the main pipe portion and the branch pipe portion. The branch pipe cover is a belt-like body having a length corresponding to the outer peripheral length of the branch pipe portion of a predetermined size, and when the wrapping tube cover is wound around the outer surface of the branch pipe portion, the proximal end side of the branch pipe portion has a large diameter. It is formed in a curved band shape that is curved in an arc shape having a substantially truncated cone shape.

  According to the first invention, since the branch pipe cover is formed in a curved band shape having a substantially truncated cone shape, the main pipe part is installed at the proximal end portion of the branch pipe part with the main pipe cover attached to the main pipe part. Even if it is greatly exposed, the exposed part of the main pipe part can be appropriately covered with the branch pipe cover. Therefore, the pipe joint can be appropriately covered without leaving the main pipe portion exposed at the proximal end portion of the branch pipe portion.

  Further, the branch pipe cover can be applied to a plurality of types of branch pipe portions including a branch pipe portion having a predetermined size and a branch pipe portion having a diameter smaller than the predetermined size. For this reason, it is not necessary to prepare a branch pipe cover for each size of the branch pipe portion, and the number of assorted branch pipe covers can be reduced. Therefore, the manufacturing cost of the branch pipe cover, and thus the pipe joint cover, can be reduced.

  A second invention is dependent on the first invention, and the branch pipe cover has a length corresponding to an outer peripheral length of the branch pipe portion when the branch pipe cover is attached to the branch pipe portion having a diameter smaller than a predetermined size. A length-adjusting cutting guide portion serving as a mark for cutting is provided.

  According to the second invention, the operator can accurately and easily adjust the length of the branch pipe cover by using the cutting guide portion for adjusting the length as a guide.

  A third invention is dependent on the first or second invention, and the main pipe cover has one or a plurality of openings through which a branch pipe portion of a predetermined size can be inserted.

  According to the third invention, since the opening for inserting the branch pipe portion of the pipe joint is formed in the main cover in advance, it is troublesome to cut the main cover at the construction site to form the opening. Reduced. Therefore, the workability of the pipe joint cover is improved.

  A fourth invention is dependent on any one of the first to third inventions, and the main cover is for forming one or a plurality of openings through which a branch pipe portion of a predetermined size can be inserted by a cutting operation. It has the cutting guide part for opening part used as a mark.

  According to the fourth invention, the work burden of cutting the main cover to form the opening is generated, but the opening can be formed in accordance with the configuration of the pipe joint, so the versatility of the main cover is enhanced.

  The fifth invention is dependent on the fourth invention, and the cutting guide for forming the opening is provided with a cut in a broken line shape.

  According to the fifth aspect, the work of cutting the main cover to form the opening is facilitated.

  A sixth invention is a branch pipe cover that covers an outer surface of a branch pipe part of a pipe joint having a main pipe part and a branch pipe part, and has a length corresponding to the outer peripheral length of the branch pipe part of a predetermined size. And a branch pipe cover that is formed in a curved band shape in which the proximal end side of the branch pipe portion has a large diameter and a substantially truncated cone shape when wound around the outer surface of the branch pipe portion.

  In the sixth invention, the branch pipe cover is a cover that covers the outer surface of the branch pipe portion of the pipe joint, and is used together with the main body cover that covers the outer surface of the main pipe portion of the pipe joint. This branch pipe cover is a belt-like body having a length corresponding to the outer peripheral length of the branch pipe portion of a predetermined size, and when the wrapping around the outer surface of the branch pipe portion is attached, the proximal end side of the branch pipe portion has a diameter. It is formed in a curved band shape that is curved in an arc shape having a large substantially truncated cone shape.

  According to the sixth invention, since the branch pipe cover is formed in a curved band shape having a substantially truncated cone shape, the main pipe part is installed at the proximal end portion of the branch pipe part with the main pipe cover attached to the main pipe part. Even if it is greatly exposed, the exposed part of the main pipe part can be appropriately covered with the branch pipe cover. Therefore, the pipe joint can be appropriately covered without leaving the main pipe portion exposed at the proximal end portion of the branch pipe portion.

  The branch pipe cover is applicable to a plurality of types of branch pipe parts including a branch pipe part having a predetermined size and a branch pipe part having a diameter smaller than the predetermined size. For this reason, it is not necessary to prepare a branch pipe cover for each size of the branch pipe portion, and the number of assorted branch pipe covers can be reduced. Therefore, the manufacturing cost of the branch pipe cover can be reduced.

  According to this invention, since the branch pipe cover is formed in a curved band shape having a substantially truncated cone shape, the main pipe portion is large at the proximal end portion of the branch pipe portion with the main pipe cover attached to the main pipe portion. Even if it is exposed, the exposed portion of the main pipe portion can be appropriately covered with the branch pipe cover. Therefore, the pipe joint can be appropriately covered without leaving the main pipe portion exposed at the proximal end portion of the branch pipe portion.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(A) is a perspective view which shows a mode that the pipe joint cover which is one Example of this invention was attached to the pipe joint, (B) is the top view. It is the front view which made the surface at the side of the sound absorption layer of the main pipe cover with which the pipe joint cover of FIG. It is a right view which shows the main cover of FIG. It is a top view which shows the main cover of FIG. It is the front view which made the surface at the side of the sound insulation layer of the branch pipe cover with which the pipe joint cover of FIG. It is a right view which shows the branch pipe cover of FIG. It is an illustration figure for demonstrating the function of a branch pipe cover. It is an illustration for demonstrating the mounting method of the pipe joint cover of FIG. 1, Comprising: The pipe joint of a state with no pipe joint cover attached is shown. It is an illustration for demonstrating the mounting method of the pipe joint cover of FIG. 1, Comprising: A mode that the main pipe cover was mounted | worn to the pipe joint is shown. It is an illustration for demonstrating the mounting method of the pipe joint cover of FIG. 1, Comprising: The mode which attached the main pipe cover and the branch pipe cover to the pipe joint is shown. It is an illustration figure which shows another example of a branch pipe cover. It is an illustration figure which shows a mode that the pipe joint cover provided with the branch pipe cover of FIG. 11 was attached to the pipe joint. It is an illustration figure which shows another example of a main cover. It is an illustration figure which shows another example of a main cover. It is an illustration figure which shows another example of a main cover. It is an illustration figure which shows another example of a main cover. It is an illustration figure which shows another example of a main cover. It is an illustration figure which shows a mode that the pipe joint cover which is another Example of this invention was attached to the pipe joint. It is an illustration figure which shows another example of a branch pipe cover.

  Referring to FIG. 1, a pipe joint cover 10 according to an embodiment of the present invention includes a main pipe cover 12 and a branch pipe cover 14, and is used for a water supply / drainage pipe mainly for the purpose of sound insulation and heat insulation. The outer surface of the joint 100 is covered.

  The pipe joint 100 to which the pipe joint cover 10 is applied is not particularly limited in material and structure as long as the pipe joint 100 includes the main pipe portion 102 and the branch pipe portion 104, but in this embodiment, the floor slab 110 is provided. Description will be made assuming that the drainage collecting pipe is made of cast iron so as to penetrate therethrough. Specifically, the pipe joint 100 includes a vertical tubular main pipe portion 102 that is connected to the drainage main pipe 112 and constitutes a part thereof, and three branch pipe portions that branch laterally from the side wall of the main pipe portion 102. (Branch tube receiving port) 104. A drainage horizontal branch pipe 114 is connected to the branch pipe section 104. Further, of the three branch pipe portions 104, two opposite branch pipe portions 104 are branch pipe portions for a nominal diameter of 75 mm to which a drainage horizontal branch pipe 114 having a nominal diameter of 75 mm is connected, and are formed therebetween. The branch pipe portion 104 is a branch pipe portion for a nominal diameter of 50 mm to which a drainage horizontal branch pipe 114 having a nominal diameter of 50 mm is connected.

  Hereinafter, the configuration of the pipe joint cover 10 will be specifically described. As shown in FIG. 1, the pipe joint cover 10 includes a main pipe cover 12 and a branch pipe cover 14. The main pipe cover 12 is a cover that is attached to the outer surface of the main pipe section 102 except for the branch pipe section 104. In this embodiment, a portion of the main pipe section 102 that protrudes above the floor slab 110. Coating. On the other hand, the branch pipe cover 14 is a cover that is individually attached to the outer surface of each branch pipe portion 104. In this embodiment, since the pipe joint 100 has three branch pipe portions 104, three branch pipe covers 14 are used.

  As shown in FIGS. 2 to 4, the main cover 12 is formed of a thick sound absorbing layer 20 formed of a sound absorbing material such as glass wool and flexible polyurethane foam, and a sound insulating material such as soft vinyl chloride and high specific gravity asphalt. The thin sound insulation layer 22 is formed, and is formed in a rectangular band shape as a whole. A method for integrating the sound absorbing layer 20 and the sound insulating layer 22 may be appropriately selected from known methods such as adhesion, and is not particularly limited. In this embodiment, the sound absorbing layer 20 is formed using a sewing thread (not shown). And the sound insulation layer 22 are sewn together. As will be described later, when the main cover 12 is attached to the main section 102, the main cover 12 is wound around the outer surface of the main section 102 in a substantially cylindrical shape so that the sound absorbing layer 20 side is on the inner side. . The sound absorbing layer 20 also functions as a heat insulating layer.

  The length in the longitudinal direction of the sound absorbing layer 20 is set to a length corresponding to the outer peripheral length of the main pipe portion 102, and the width (vertical width) is a length by which the main pipe portion 102 protrudes from the upper surface of the floor slab 110. The length is set according to On the other hand, the sound insulating layer 22 is formed to be slightly larger than the sound absorbing layer 20, and one end and upper end of the sound insulating layer 22 extend laterally and upward from the sound absorbing layer 20. That is, the main cover 12 has a single layer portion formed by the sound insulating layer 22 at one end and upper end thereof.

  A plurality of cuts (slits) 24 are formed in the upper end portion of the sound insulating layer 22 (that is, the upper end portion of the main cover 12) extending linearly in the vertical direction and arranged at predetermined intervals in the horizontal direction. By having such an incision 24, the main cover 12 can appropriately follow the portion of the main pipe portion 102 that has a diameter reduced to a stepped shape. Further, the main cover 12 is provided with a hook and loop fastener as a fixing portion for fixing and holding the main cover 12 while being wound around the outer surface of the main pipe portion 102. Specifically, on the surface of the other end portion of the sound insulating layer 22 (surface opposite to the sound absorbing layer 20), a rectangular loop surface 26a raised in a loop shape is provided, and one end portion of the sound insulating layer 22 is provided. A rectangular hook surface 26b raised like a hook is provided on the back surface.

  An opening 28 for inserting the branch pipe portion 104 is formed at the lower end portion of the main cover 12. In this embodiment, since the pipe joint 100 has three branch pipe portions 104, three openings 28 are formed at positions corresponding to the respective branch pipe portions 104. Each opening 28 is formed in a substantially circular shape, and a notch 28a for fitting the branch pipe portion 104 from the side is formed at the lower end portion thereof. The size of each opening 28 is set to a size that allows the branch pipe portion 104 of a predetermined size to be inserted. At this time, each opening 28 is uniformly matched to the largest diameter branch pipe portion 104 of the branch pipe portions 104 included in the pipe joint 100 to which the main pipe cover 12 (and thus the pipe joint cover 10) can be applied. It is preferable to be formed in the size. In this embodiment, the pipe joint 100 has branch pipe portions 104 for a nominal diameter of 75 mm and a nominal diameter of 50 mm, but each opening portion 28 of the main pipe cover 12 is inserted through the branch pipe portion 104 for a nominal diameter of 75 mm. It is formed in a possible size.

  Thus, by forming the opening 28 in the main cover 12 in advance, there is no need to cut the main cover 12 at the construction site to form the opening 28. Improves. In addition, the pipe joint 100 is provided with branch pipe parts 104 of various sizes even if the main pipe part 102 has the same size, but each opening part 28 of the main pipe cover 12 has a branch pipe part with the maximum diameter. By forming a uniform size in accordance with 104, it is possible to deal with a plurality of types of pipe joints 100, and the versatility of the main pipe cover 12 is enhanced.

  As shown in FIGS. 5 and 6, the branch pipe cover 14 is formed of a thick sound absorbing layer 30 formed of a sound absorbing material such as glass wool and soft polyurethane foam, and a sound insulating material such as soft vinyl chloride and high specific gravity asphalt. A thin band-shaped body having a thin sound insulation layer 32, which is formed into a curved band shape that is curved in an arc shape as a whole. The method for integrating the sound absorbing layer 30 and the sound insulating layer 32 is not particularly limited as in the case of the main pipe cover 12, but in this embodiment, using the sewing thread 34, the central portion in the longitudinal direction of the branch pipe cover 14 and The sound-absorbing layer 30 and the sound-insulating layer 32 are integrated by sewing together at both ends.

  As will be described later, the branch pipe cover 14 is wound around the outer surface of the branch pipe portion 104 so that the sound absorbing layer 30 is on the inner side. And when it winds around the outer surface of the branch pipe part 104, it becomes a substantially oblique truncated cone (eccentric truncated cone) shape where the base end side of the branch pipe part 104 is large in diameter. That is, the branch pipe cover 14 is formed in a curved band shape in which the proximal end side of the branch pipe portion 104 has a large diameter and a substantially truncated cone shape when wound around the outer surface of the branch pipe portion 104. In this way, the main pipe cover 12 is temporarily attached to the main pipe section 102 by forming the branch pipe cover 14 in the shape of a curved strip having a substantially oblique truncated cone shape on the base end side of the branch pipe section 104. In this state, even when the main pipe portion 102 is largely exposed at the proximal end portion of the branch pipe portion 104, when the branch pipe cover 14 is attached to the branch pipe portion 104, the branch pipe cover 14 causes the main pipe portion 102 to The exposed portion can be properly coated.

  Further, on the end surface of the outer side of the branch pipe cover 14 (the base end side of the branch pipe part 104), two protrusions 36 that protrude outward are formed to correspond to the curvature of the outer side surface of the main pipe cover 12. Is done.

  The length of the branch pipe cover 14 in the longitudinal direction (length on the inner peripheral side) is set to a length corresponding to the outer peripheral length of the branch pipe portion 104 of a predetermined size, and the width (depth) thereof is set to the branch pipe portion 104. It is set to a length corresponding to the protruding length from the main pipe portion 102. At this time, the branch pipe cover 14 has a length corresponding to the branch pipe part 104 having the largest diameter among the branch pipe parts 104 included in the pipe joint 100 to which the branch pipe cover 14 (and the pipe joint cover 10 is applicable). It is preferable to be formed. In this embodiment, the pipe joint 100 has branch pipe portions 104 for a nominal diameter of 75 mm and a nominal diameter of 50 mm, but each branch pipe cover 14 corresponds to the outer peripheral length of the branch pipe portion 104 for a nominal diameter of 75 mm. It is formed in length. Further, in this embodiment, when the branch pipe cover 14 is wound around the outer surface of the branch pipe portion 104, the upper side of the branch pipe cover 14 is deformed into a substantially oblique truncated cone shape with the upper side being an inclined surface. The branch pipe portion 104 is formed so that the height difference between the proximal end edge and the distal end edge is 30 mm. As described later, in the case of the branch pipe portion 104 for a nominal diameter of 50 mm, the branch cover 14 can be deformed into a substantially oblique truncated cone shape having an inclined surface on the upper side. This is because the main pipe portion 102 is largely exposed in the upper half of the base end portion of the branch pipe portion 104 when mounted on the main pipe portion 102 (see FIG. 9). However, the magnitude of this height difference can be changed as appropriate.

  Here, in FIG. 7, the branch pipe cover 14 for a nominal diameter of 75 mm created in accordance with the branch pipe portion 104 for a nominal diameter of 75 mm and the nominal diameter of 50 mm created in accordance with the branch pipe portion 104 for a nominal diameter of 50 mm. A state in which the branch pipe cover 14 is superposed is shown. As can be seen from FIG. 7, these two branch pipe covers 14 are similar in shape to each other, and by cutting both ends of the branch pipe cover 14 for a nominal diameter of 75 mm and adjusting the length, the two branch pipe covers 14 are for a nominal diameter of 50 mm. It can be seen that it can be used as the branch pipe cover 14.

  That is, as described above, the branch pipe cover 14 formed to have a length corresponding to the outer peripheral length of the branch pipe portion 104 having a predetermined size (for nominal diameter 75 mm) is larger than the predetermined size if both ends thereof are cut. It can also be used for the branch pipe portion 104 having a small diameter (for example, for a nominal diameter of 65 mm or a nominal diameter of 50 mm). In addition, the cutting operation of the branch pipe cover 14 is easy and the work load is small because both end portions thereof are cut linearly.

  Returning to FIGS. 5 and 6, the branch pipe cover 14 is provided with a cutting guide portion 38 for adjusting the length. The cutting guide portion 38 serves as a mark for cutting to a length corresponding to the outer peripheral length of the branch pipe portion 104 when the branch pipe cover 14 is attached to the branch pipe portion 104 having a diameter smaller than a predetermined size. is there. In this embodiment, a cutting guide portion 38 indicating the cutting position when attached to the branch pipe portion 104 for a nominal diameter of 65 mm and a nominal diameter of 50 mm is provided on the surface of the sound insulating layer 32. The operator can adjust the length of the branch pipe cover 14 accurately and easily by using the cutting guide portion 38 as a guide. The cutting guide portion 38 may be formed with a broken line-like cut that penetrates the branch pipe cover 14 in the thickness direction so that the cutting operation is facilitated. However, instead of providing the cutting guide part 38 separately, the sewing thread 34 may be used as the cutting guide part 38. That is, the cutting guide portion 38 may be the sewing thread 34.

  Then, with reference to FIGS. 8-10, the construction method of the pipe joint cover 10 is demonstrated. FIG. 8 shows the piping structure of the pipe joint 100 before the pipe joint cover 10 is mounted.

  When attaching the pipe joint cover 10 to the pipe joint 100, first, as shown in FIG. 9, the main pipe cover 12 is attached to the main pipe portion 102 of the pipe joint 100. Specifically, the main pipe cover 12 is wound around the outer surface of the pipe joint 100 while the branch pipe portions 104 are inserted into the openings 28 so as to pass through the notches 28 a of the openings 28. Then, the main cover 12 is fixed to the main pipe section 102 by connecting the loop surface 26 a and hook surface 26 b of the hook-and-loop fastener. Further, the vertical pipe cover 120 is attached to the drainage main pipe 112, and a fixing member 122 such as an adhesive tape is wound around the abutting portion between the main pipe cover 12 and the vertical pipe cover 120, whereby the main pipe cover 12 and the vertical pipe cover 12 are installed. It fixes so that a clearance gap may not arise between the cover 120 for pipes.

  Next, as shown in FIG. 10, the branch pipe cover 14 is attached to each of the branch pipe portions 104 of the pipe joint 100. Specifically, the branch pipe cover 14 is wound around and attached to the outer surface of each branch pipe portion 104 so that the base end side of the branch pipe portion 104 has a substantially oblique truncated cone shape having a large diameter. Then, the branch pipe cover 14 is fixed to the branch pipe portion 104 and the main pipe cover 12 using a fixing member such as an adhesive tape (not shown). At this time, the branch pipe cover 14 may be wound around the branch pipe portion 104 for a nominal diameter of 75 mm. On the other hand, for the branch pipe portion 104 for a nominal diameter of 50 mm, both ends of the branch pipe cover 14 are cut along the cutting guide portion 38 to adjust the length, and then the branch pipe cover 14 whose length is adjusted is attached. Wrap around.

  Here, in this embodiment, each opening 28 of the main cover 12 is formed in a size that allows the branch pipe portion 104 for a nominal diameter of 75 mm to be inserted. For this reason, when the branch pipe portion 104 for a nominal diameter of 50 mm is inserted into the opening 28, the proximal end of the branch pipe portion 104 with the main cover 12 attached to the main pipe portion 102 as shown in FIG. The main pipe 102 is greatly exposed in the upper half of the portion. However, when the branch pipe cover 14 is wound around the outer surface of the branch pipe portion 104, the proximal end side of the branch pipe portion 104 has a substantially oblique truncated cone shape, and as shown in FIG. When the cover 14 is attached to the branch pipe portion 104, the exposed portion of the main pipe portion 102 is appropriately covered by the branch pipe cover 14.

  As described above, according to this embodiment, since the branch pipe cover 14 is formed in a curved band shape having a substantially oblique truncated cone shape, the main pipe portion 102 is largely exposed at the base end portion of the branch pipe portion 104. However, the exposed portion of the main pipe portion 102 can be appropriately covered with the branch pipe cover 14 without increasing the thickness of the sound absorbing layer 30 more than necessary. That is, the pipe joint 100 can be appropriately covered without leaving the main pipe portion 102 exposed at the proximal end portion of the branch pipe portion 104.

  The branch pipe cover 14 can be applied to a plurality of types of branch pipe portions 104 including a branch pipe portion 104 having a predetermined size and a branch pipe portion 104 having a diameter smaller than the predetermined size. For this reason, it is not necessary to prepare the branch pipe cover 14 for each size of the branch pipe portion 104, and the number of assortment points of the branch pipe cover 14 can be reduced. Therefore, the manufacturing cost of the branch pipe cover 14 and the pipe joint cover 10 can be reduced.

  Furthermore, since the main cover 12 has the opening 28 in advance, it is not necessary to cut the main cover 12 at the construction site to form the opening 28. Therefore, the workability of the pipe joint cover 10 is improved. Further, by forming each opening 28 of the main pipe cover 12 in a uniform size according to the branch pipe portion 104 having the maximum diameter, a plurality of types of pipe joints 100 can be handled. Therefore, the number of assortment of the main cover 12 can be reduced, and the manufacturing cost of the main cover 12 and the pipe joint cover 10 can be reduced.

  In the above-described embodiment, the branch pipe cover 14 is formed in a curved band shape having a substantially oblique truncated cone (eccentric truncated cone) shape in a wound state, but is not limited thereto. As shown in FIGS. 11 and 12, the branch pipe cover 14 is formed in a curved band shape in which the proximal end side of the branch pipe portion 104 is a large concentric truncated cone shape when wound around the outer surface of the branch pipe portion 104. May be. That is, the substantially truncated cone shape referred to in the present invention includes a substantially oblique truncated cone shape and a substantially concentric truncated cone shape.

  Further, in the above-described embodiment, the branch pipe cover 14 having the same size is also used for the branch pipe portion 104 having a predetermined size and the branch pipe portion 104 having a diameter smaller than the predetermined size. A dedicated branch pipe cover 14 may be manufactured and used in accordance with the branch pipe portion 104.

  Furthermore, in the above-described embodiment, the three openings 28 are formed in the main pipe cover 12 in advance, but the number and arrangement of the openings 28 can be appropriately changed according to the configuration of the pipe joint 100. . For example, if the pipe joint 100 has one branch pipe portion 104, it is preferable to form one opening 28 in the main pipe cover 12 as shown in FIG. 13. Further, for example, if the pipe joint 100 has two branch pipe parts 104 arranged at intervals of 180 degrees, the main pipe part 102 of the pipe joint 100 is provided in the main pipe cover 12 as shown in FIG. It is preferable to form two openings 28 at positions that are spaced by 180 degrees when mounted on the. Furthermore, for example, if the pipe joint 100 has two branch pipe parts 104 arranged at intervals of 90 degrees, the main pipe part 102 of the pipe joint 100 is provided in the main pipe cover 12 as shown in FIG. It is preferable to form two openings 28 at positions that are 90 ° apart when mounted on the.

  Furthermore, in the above-described embodiment, the opening 28 is formed in the main cover 12 in advance. However, the opening 28 does not necessarily have to be formed in advance, and the opening 28 is cut by a cutting operation at a construction site. May be formed. In this case, as shown in FIG. 16, openings serving as marks for forming one or a plurality of openings 28 through which the branch pipe portion 104 having a predetermined size can be inserted into the main cover 12 by a cutting operation. A cutting guide portion 50 for forming a portion may be formed in advance. As an example, three cutting guide parts 50 are formed side by side so as to form a maximum of three openings 28.

  Further, although not shown in the drawing, the cutting guide portion 50 may be provided with a broken line-like cut that penetrates the main cover 12 in the thickness direction. By forming a cut in the cutting guide portion 50, the forming operation of the opening 28 is facilitated.

  According to the main cover 12 as shown in FIG. 16, there is a work burden of cutting the main cover 12 to form the opening 28, but the opening 28 can be formed according to the configuration of the pipe joint 100, The versatility of the main cover 12 is enhanced. Further, when the opening 28 is formed by a cutting operation at the construction site, the main pipe 102 may be largely exposed at the proximal end portion of the branch pipe 104 due to an operation error. However, even in this case, the exposed portion of the main pipe portion 102 can be appropriately covered with the branch pipe cover 14 because the branch pipe cover 14 is formed in a curved band shape having a substantially truncated cone shape.

  In addition, as shown in FIG. 17, both the opening 28 and the cutting guide 50 for forming the opening can be formed on the main cover 12. As a result, the work burden of forming the opening 28 can be reduced while maintaining the versatility of the main cover 12.

  In the above-described embodiment, the main cover 12 is formed so as to have a substantially cylindrical shape when mounted on the main section 102, but is not limited thereto. For example, as in the embodiment shown in FIG. 18, the main cover 12 may be formed to have a substantially rectangular tube shape when attached to the main pipe portion 102. In this case, the outer surface of the main pipe cover 12 has a flat surface in contact with the branch pipe cover 14. For this reason, as the branch pipe cover 14 used in combination with the main pipe cover 12 shown in FIG. 18, it is preferable to use a branch pipe cover such as the branch pipe cover 14 shown in FIG. That is, the branch pipe cover 14 is not necessarily required to have the protruding portion 36.

  Further, in the above-described embodiment, the main cover 12 is formed in a rectangular band shape and wound around the main pipe portion 102, but the main cover 12 is opened and closed for mounting on the main pipe portion 102. A cylindrical shaped body having a portion may be used.

  Furthermore, in the above-described embodiment, the main cover 12 and the branch pipe cover 14 have a two-layer structure of the sound absorbing layers 20 and 30 and the sound insulating layers 22 and 32, but the sound insulating layers 22 and 32 are not necessarily provided. There is no need. For example, the main cover 12 and the branch pipe cover 14 may be configured by sound absorbing layers 20 and 30 and a surface protective layer formed of aluminum or the like. Further, the main cover 12 and the branch pipe cover 14 may have a structure of three or more layers.

  In the above embodiment, the main cover 12 is fixed to the main pipe portion 102 using the hook-and-loop fasteners 26a and 26b, and the branch pipe cover 14 is fixed to the branch pipe portion 104 using an adhesive tape. The fixing method of the main cover 12 and the branch pipe cover 14 can be changed as appropriate. For example, the main pipe cover 12 may be fixed using an adhesive tape, or the branch pipe cover 14 may be fixed using a hook-and-loop fastener. Further, the main cover 12 or the branch pipe cover 14 may be fixed using a fixing member such as a turtle shell wire or iron wire.

  It should be noted that the specific numerical values such as the dimensions given above are merely examples, and can be appropriately changed according to necessity such as product specifications.

DESCRIPTION OF SYMBOLS 10 ... Pipe joint cover 12 ... Main pipe cover 14 ... Branch pipe cover 20 ... Sound absorption layer of main pipe cover 22 ... Sound insulation layer of main pipe cover 28 ... Opening 30 ... Sound absorption layer of branch pipe cover 32 ... Sound insulation of branch pipe cover Layer 38 ... Cutting guide section 50 for adjusting the length 50 ... Cutting guide section for forming the opening 100 ... Pipe joint 102 ... Main pipe section 104 ... Branch pipe section

Claims (6)

A pipe joint cover for covering an outer surface of a pipe joint having a main pipe part and a branch pipe part,
A main cover that is mounted on an outer surface of the main pipe section excluding the branch pipe section;
A branch pipe cover wound around and attached to the outer surface of the branch pipe portion;
The branch pipe cover has a length corresponding to an outer peripheral length of the branch pipe portion having a predetermined size, and a substantially conical shape in which a proximal end side of the branch pipe portion has a large diameter when wound around an outer surface of the branch pipe portion. A pipe joint cover formed in the shape of a trapezoidal curved band.   The branch pipe cover has a length that serves as a mark for cutting to a length corresponding to the outer peripheral length of the branch pipe portion when the branch pipe cover is attached to the branch pipe portion having a diameter smaller than the predetermined size. The pipe joint cover according to claim 1, comprising a cutting guide portion for adjustment.   The pipe joint cover according to claim 1, wherein the main pipe cover has one or a plurality of openings through which the branch pipe portion having the predetermined size can be inserted.   The main pipe cover has a cutting guide portion for forming an opening serving as a mark for forming one or a plurality of openings through which the branch pipe portion of the predetermined size can be inserted by a cutting operation. The pipe joint cover according to any one of 3 to 3.   The pipe joint cover according to claim 4, wherein a cut is formed in a broken line shape in the opening guide for forming the opening. A branch pipe cover that covers an outer surface of the branch pipe part of a pipe joint having a main pipe part and a branch pipe part,
A curved band shape having a length corresponding to the outer peripheral length of the branch pipe portion of a predetermined size, and having a proximal end side of the branch pipe portion having a large diameter in a substantially truncated cone shape when wound around the outer surface of the branch pipe portion Formed in a branch pipe cover.

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