JPH0640595U - Pipe cover - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pipe cover for heat insulation and heat insulation of pipes such as water pipes and air conditioner pipes, which can very easily enclose the outer circumference of the pipe. [Structure] The outer circumference of the pipe is held and wrapped from both sides 2
In the split synthetic resin pipe cover 14, the synthetic foam resin is made of a foamed polyolefin resin,
A pair of cover halves 15 constituting the pipe cover 14
The a and 15b are connected to each other through the bent portion 16, and the engaging convex portions 17 and the engaging concave portions 18 that are engageable with each other are provided on the joint surfaces of the cover halves 15a and 15b. [Effect] In order to cover the pipe with the pipe cover 14 so as to insulate and keep it warm, the pipe cover 14 is bent at the bending portion 16 and the outer peripheries of the pipes are held from both sides by both cover halves 15a and 15b. It suffices to push the stop convex portion 17 into the locking concave portion 18 and engage it. Therefore, the heat insulation and heat retention work of the pipe can be performed extremely easily and quickly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe cover used for heat insulation and heat retention of pipes such as water pipes, hot water supply pipes and air-conditioning equipment pipes. More specifically, it is a two-part foam that holds the outer circumference of the pipe from both sides to cover it. The present invention relates to a synthetic resin resin pipe cover.

[0002]

[Prior art]

 Conventionally, various types of pipe covers of this type have been put into practical use, and one of the typical ones is shown in FIGS. 6 and 7. In these drawings, a pipe 1 is a Y-shaped pipe in which a branch pipe 3 is connected to a straight pipe 2, and a pipe cover 4 is composed of a pair of cover halves 5a and 5b that hold and enclose the outer periphery of the pipe 1. Has been done.

Both cover halves 5a, 5b are formed into a symmetrical shape with each other by dividing the pipe cover 4 into two parts on a plane including the axis of the straight pipe 2 and the branch pipe 3, and have an inner-outer two-layer structure. Has been done. The inner layer 6 is made of expanded polypropylene resin to give heat resistance and elasticity, and the outer layer 7 is made of expanded polyethylene resin. When manufacturing both cover halves 5a, 5b, first, an extruded sheet made of expanded polypropylene resin and an extruded sheet made of expanded polyethylene resin are prepared, and then both sheets are heat-sealed to form two layers. A sheet is manufactured, then both cover halves 5a, 5b are formed from this two-layer sheet by vacuum forming, and the excess sheet remaining on both cover halves 5a, 5b is cut off. It is manufactured by sticking a plurality of double-sided adhesive tapes 8 on one of the joint surfaces of the cover halves 5a, 5b. A release paper 9 is attached to the surface of the double-sided adhesive tape 8.

[0004]

[Problems to be solved by the device]

 However, in order to cover the outer circumference of the pipe 1 with the above-mentioned conventional pipe cover 4, it is necessary to find a pair of symmetrical cover halves 5a, 5b from many cover halves 5a, 5b and combine them. Also, in order to bond the joint surfaces of both cover halves 5a, 5b with the double-sided adhesive tape 8, be sure to peel off the release paper 9 to expose the adhesive layer, and be careful not to shift the halves. Therefore, there was a problem that all the work was extremely troublesome and the work efficiency was poor. Also in terms of manufacturing, first, a foamed polypropylene sheet and a foamed polyethylene sheet are prepared, and then these sheets are heat-sealed to form a two-layer structure sheet, which is then vacuum-formed, and then an extra sheet is formed. In addition to the complicated process of excision, there was a problem that a large amount of cut pieces of the sheet were generated and it was uneconomical. An object of the present invention is to improve the conventional pipe cover to eliminate the above-mentioned problems.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the pipe cover of the present invention is a two-part foamed synthetic resin pipe cover that holds the outer circumference of the pipe by enclosing it from both sides, wherein the foamed synthetic resin is a foamed polyolefin resin. And a pair of cover halves constituting the pipe cover are connected to each other through a bent portion, and engaging ridges and engaging dents which are engageable with each other are provided on the joint surfaces of the cover halves. It is configured.

From the viewpoint of heat resistance, it is preferable that the foamed polyolefin-based resin is a foamed polypropylene resin, and it is more preferable that the foamed polyolefin-based resin has resistance to the material metal of the pipe. Further, the bent and / or locking convex portion may be made of the same material as the cover half body, or may be made of unfoamed polyolefin resin, film, tape, cloth or the like. Further, the entire pipe cover may be integrally molded by in-mold foam molding.

[0007]

[Action]

 In the pipe cover with the above configuration, since a pair of cover halves are connected via a bent portion, it is not necessary to search for a pair of symmetrical cover halves as in the conventional case when used, and the cover halves are Since the mating surfaces are provided with a locking projection and a locking recess that can be engaged with each other, when both cover halves are joined, it is sufficient to push the locking projection into the locking recess for engagement. The complicated work of peeling off the release paper and adhering the halves so that the two halves do not shift is eliminated.

When a foamed polypropylene resin is used as the foamed polyolefin resin, the foamed polypropylene resin has heat resistance and elasticity, so that it can be used for a pipe through which a high temperature fluid flows, and the pipe cover adheres well to the pipe. As a result, the heat insulation and heat retention effects are improved, and the bent portion withstands multiple bendings. Further, by imparting resistance to the foamed polyolefin resin to the material metal of the pipe such as copper and zinc, deterioration of the foamed polyolefin resin due to the material metal of the pipe is prevented, and the durability is improved.

In addition, when the bent portion and / or the locking convex portion are made of the same material as the cover half body or made of unfoamed polyolefin resin, the entire pipe cover or each cover half body is integrally molded. It will be possible. Furthermore, if the entire pipe cover is integrally molded by in-mold foam molding, the manufacturing cost will be greatly reduced.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a state in which a pipe is covered with the pipe cover of this embodiment. In FIG. 1, the pipe 11 is a Y-shaped pipe in which a branch pipe 13 is connected to a straight pipe 12, and a pipe cover 14 is divided into two parts to hold the outer circumference of the pipe 11 from both sides and enclose it. It is composed of a pair of cover halves 15a and 15b.

Both the cover halves 15a and 15b are made of a foamed polyolefin resin, and are obtained by dividing the pipe cover 14 into two planes including the straight pipe 12 and the branch pipe 13 as shown in FIG. They have mutually symmetrical shapes, are connected to each other via bent portions 16 (two locations in FIG. 2), and are integrally molded by in-mold foam molding. Then, as shown in FIGS. 2 and 3, a suitable number of engaging projections 17 and engaging recesses 18 that can be engaged with each other are provided in the middle of both outer edges of the joint surfaces of the cover halves 15a and 15b. It is provided in the facing position.

The locking projections 17 and the locking recesses 18 are provided in the middle of both outer edges of the contact surfaces of the cover halves 15a and 15b, but as another embodiment, as shown in FIG. It may be provided along each edge of the joint surface, or as another embodiment, it may be provided along the entire length of both side edges of the joint surface as shown in FIG. In any case, the action and effect of the locking projection 17 and the locking recess 18 are the same.

Further, when a foamed polypropylene resin is used as the foamed polyolefin resin, the foamed polypropylene resin is excellent in heat resistance and elasticity, so that it is suitable for the pipe 11 to flow a high-temperature fluid, and the pipe cover. 14 adheres well to the pipe 11 to improve heat insulation and heat retention effects. Moreover, since the bent portion 16 can endure bending as many times as desired, the pipe cover 14 can be repeatedly used. However, since the pipe cover 14 is extremely rarely used repeatedly, the bent portion 16 may be cracked or broken by a single bending.

Further, when the pipe 11 is a copper pipe, a galvanized steel pipe, or the like, in order to prevent the foamed polyolefin resin from being deteriorated by a metal such as copper or zinc, a resistance is imparted to these metals. It is preferable to knead a substance such as BHT, an amine-based, phosphorus-based or thioether-based antioxidant, or a triazole-based or hydrazine-based metal deactivator into the foamed polyolefin resin. it can.

In order to cover the pipe 11 with the pipe cover 14 having the above-described structure so as to insulate and heat the pipe 11, the pipe cover 14 is bent at the bending portion 16 and the outer periphery of the pipe 11 is covered by the both cover halves 15a and 15b. It suffices to embrace from both sides and push the locking projection 17 into the locking recess 18 for engagement. Therefore, the heat insulation and heat retention work of the pipe 11 can be performed extremely easily and in a short time.

The pipe cover of the present invention may be formed by forming a pair of cover halves, and connecting the two through a bent portion made of an adhesive tape, cloth or the like, but they are integrally formed by a bead molding method. Is preferable from the viewpoint of productivity. In this case, the bent portion may be foamed or non-foamed. Further, in the above-mentioned embodiment, an example in which a plurality of bent portions, locking convex portions, and locking concave portions are provided is shown, but by providing at least one of these, the object of the present invention can be achieved.

[0017]

[Effect of device]

 Since the present invention is configured as described above, it has the following advantages. A conventional double-sided adhesive tape in which a pipe cover is connected to a pair of cover halves via a bent portion, and a locking convex portion and a locking concave portion capable of engaging with each other are provided on a joint surface of these cover halves. Since it is unnecessary, when using it, it is troublesome to find a pair of symmetrical cover halves as in the past, and peel off the release paper of the double-sided adhesive tape to expose the adhesive, so that the halves do not shift. The troublesome work of gluing is unnecessary. Therefore, the outer circumference of the pipe can be wrapped very easily and quickly, and the efficiency of heat insulation and heat retention work is improved.

When a foamed polypropylene resin is used as the foamed polyolefin resin, the foamed polypropylene resin has heat resistance and elasticity, so that the pipe cover can be used as a pipe for flowing a high temperature fluid, and the pipe cover can be used as a pipe. It adheres well to improve the heat insulation and heat retention effect, and the bent part can withstand repeated bending so that the pipe cover can be used repeatedly. Furthermore, when the foamed polyolefin resin contains a substance that imparts resistance to the pipe material metal, deterioration of the foamed polyolefin resin due to the pipe material metal can be prevented and durability can be improved.

If the bent portion and / or the locking projection is made of the same material as the cover half body or is made of unfoamed polyolefin resin, the entire pipe cover or each cover half body can be molded. It is possible and the manufacturing cost is reduced. Furthermore, if the entire pipe cover is integrally molded by in-mold foam molding, the manufacturing cost will be greatly reduced.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a pipe cover showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the pipe cover of the embodiment shown in FIG.

FIG. 3 is an enlarged perspective view showing an engaged state of an embodiment of a locking projection and a locking recess provided in the present invention.

FIG. 4 is an enlarged perspective view showing an engaged state of another embodiment of the locking projection and the locking recess provided in the present invention.

FIG. 5 is an enlarged perspective view showing an engaging state of still another embodiment of the locking projection and the locking recess provided in the present invention.

FIG. 6 is an overall perspective view showing an example of a conventional pipe cover.

FIG. 7 is an exploded perspective view of the conventional pipe cover shown in FIG.

[Explanation of symbols]

 11 pipe 14 pipe cover 15a, 15b cover half body 16 bent portion 17 locking convex portion 18 locking concave portion

Claims (7)

[Scope of utility model registration request] 1. A two-part foam synthetic resin pipe cover that encloses and encloses the outer periphery of the pipe from both sides, wherein the foam synthetic resin comprises a foamed polyolefin resin,
A pair of cover halves constituting the pipe cover are connected via a bent portion, and a locking convex portion and a locking concave portion capable of engaging with each other are provided on a joint surface of these cover halves. And pipe cover. 2. The pipe cover according to claim 1, wherein the foamed polyolefin resin is a foamed polypropylene resin. 3. The pipe cover according to claim 1, wherein the foamed polyolefin resin is a foamed polyethylene resin. 4. The pipe cover according to claim 1 or 2, wherein the expanded polyolefin resin has resistance to the raw material metal of the pipe. 5. The pipe cover according to claim 1, wherein the bent portion and / or the locking convex portion are made of the same material as the cover half body. 6. The pipe cover according to claim 1, wherein the bent portion and / or the locking convex portion is made of unfoamed polyolefin resin. 7. The pipe cover according to claim 1, wherein the entire pipe cover is integrally molded by in-mold foam molding.