JP3055004U - Thermal cover - Google Patents

Abstract

(57) [Summary] [Problem] It is an object of the present invention to provide a heat insulating cover that does not require release paper for protecting an adhesive area of a connecting piece. A heat insulating cover includes a center hole through which a pipe is inserted, and an opening for inserting the pipe into the center hole.
0, a cylindrical heat insulating body 2 having a slit 21 extending in the axial direction P and covering the pipe 5, and an outer peripheral surface 22 of the heat insulating body 2.
The main body 3a integrally joined and fixed to the main body 3a, and at least one end 30 in the circumferential direction S formed integrally with the main body 3a protrudes from one end 31 defining the slit 21 and the other end side heat insulator 2 defining the slit 21 The connecting piece 3 which is directly or indirectly peelably adhered to the outer peripheral surface 22 and closes the slit 21.
b.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a heat insulating cover that insulatedly covers a pipe, a valve, a pipe connection, and the like.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 12, for example, as a means for thermally insulating and protecting a pipe 5 through which a heat medium R flows, a heat retaining cover 1A used to cover an outer peripheral surface 50 of the pipe 5 is known. I have. The heat insulating cover 1A is integrally fixed to a cylindrical heat insulator 2A having a slit 21a along the axial direction P and covering the pipe 5 so as to surround the pipe 5, and is integrally fixed to an outer peripheral surface 22a of the heat insulator 2A. It comprises a reinforcing sheet 3A having a connecting piece 32a longer than S length, and a double-sided tape 6 attached along the axial direction P to an inner side surface 320 (see FIG. 13) of the connecting piece 32a on the center direction side.

[0003] When the heat insulating cover 1A is attached to the pipe 5, the slit 21a of the heat insulator 2A is opened in the circumferential direction indicated by arrows S and S, and is moved so as to cover the outer peripheral surface 50 of the pipe 5 with the heat insulator 2A. (In the direction of arrow Y in FIG. 12). Thereafter, the release paper 60 is peeled off from the double-sided tape 6 as shown in FIG. 13, and the inner side surface 320 of the connecting piece 32a on the center direction side closes the slit 21a. The reinforcing sheet 3A is pressed through the reinforcing sheet 3A to the outer peripheral surface 22a side of the heat insulator 2A at a position extended in the circumferential direction (toward the outer surface 321 of the region surrounding the reinforcing sheet 3A) S.

Then, the inner surface 320 on the center direction side of the connecting piece 32 a is indirectly adhered to the outer peripheral surface 22 a of the heat insulator 2 A via the outer surface 321 of the area by the adhesive force of the double-sided tape 6, and heat insulation is performed. The cover 1A can be fixed and held on the pipe 5.

[0005]

[Problem to be Solved] However, in the case of the conventional heat retaining cover 1A, there is room for improvement as described below. For example, (1) it takes time to attach the double-sided tape 6 to the inner side surface 320 of the reinforcing sheet 3A on the center direction side when manufacturing the heat retaining cover 1A. (2) Since the release paper 60 for protecting the adhesive area of the double-sided tape 6 is used, the material cost cannot be reduced accordingly. (3) The release paper 60 of the double-sided tape 6 adhered to the connecting piece 32a is not prepared during storage before use at the site of use after manufacture, or during transportation to the site of use. As a measure to prevent the release paper 60 from peeling off (so as not to cause a problem that the release area of the release paper 60 comes off and the adhesive area of the connecting piece comes into contact with or sticks to another), it is necessary to tie the outer periphery of the heat insulating cover 1A with a string or the like. is there. (4) At the time of attaching the heat retaining cover 1A to the pipe 5 at the site of use, a step of peeling off the release paper 60 of the double-sided tape 6 is required each time, so the workability is low. (5) The release paper 60 peeled off from the connecting piece 32a of the reinforcing sheet 3A at the use site becomes dust.

The present invention has been made in view of the above problems, and has as its object to provide a heat insulating cover that does not require release paper to protect an adhesive area of a connecting piece.

[0007]

[Means for Solving the Problems]

 The heat insulating cover according to the present invention includes a cylindrical heat insulator covering the pipe having a central hole through which the pipe is inserted, an axially extending slit forming an opening into which the pipe is inserted, and an outer peripheral surface of the heat insulator. A main body portion integrally joined to and fixed to the main body portion, and at least one circumferential end protruding from one end defining the slit and the outer periphery of the heat insulator at the other end side defining the slit And a connecting sheet that directly or indirectly peelably adheres to the surface and has a connecting piece that closes the slit.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A heat insulating cover according to the present invention includes a tubular heat insulator and a reinforcing sheet integrally joined and fixed to an outer peripheral surface of the heat insulator. The cylindrical heat insulator covers the pipe with a central hole through which the pipe is inserted and an axially extending slit that forms an opening for inserting the pipe into the central hole.

[0009] The cylindrical heat insulator is formed of an integrated body having a predetermined thickness made of heat insulating fiber such as glass wool or rock wool, or a material having a heat insulating effect such as styrene foam. Is formed as a material, and the pipe is covered and insulated. The slit extending in the axial direction of the heat insulator can be formed as one or more slits in the circumferential direction of the heat insulator. The slit cross-sections the heat insulator in a direction intersecting with the axial direction.As viewed from the axial direction, the slit has an inclined line shape, a straight line passing through the center of the center hole, or a halfway through the straight line. One having a step can be used.

The reinforcing sheet has a main body integrally fixed to the outer peripheral surface of the heat insulating body, and is formed integrally with the main body and has at least one circumferential end projecting from one end defining the slit. It consists of a connecting piece that is directly or indirectly peelably adhered to the outer peripheral surface of the heat insulator on the end side and closes the slit. As the reinforcing sheet, aluminum kraft, aluminum glass cloth, polyethylene, or the like, a laminated sheet composed of a plurality of layers, a sheet on which aluminum is vapor-deposited on the surface, or the like can be used. The thickness, width, and length in the longitudinal direction of the reinforcing sheet can be variously set according to the purpose.

Further, the thickness of the main body and the thickness of the connecting piece can be unified to the same or different from each other. For example, the thickness of the connecting piece can be increased or reduced with respect to the thickness of the main body. When the thickness of the connecting piece is increased, there is an advantage that the connecting piece can be easily operated. When the thickness of the connecting piece is reduced, the bulging of the outer shape of the heat retaining cover when the connecting piece is fully stopped can be reduced.

[0012] The connecting piece has an adhesive layer on the inner surface on the center side so that it can be directly or indirectly peelably adhered to the outer peripheral surface of the heat insulator. can do. The connecting piece has an adhesive layer formed in various forms on the inner surface on the center direction side. As the adhesive layer, for example, a band-shaped member, a line-shaped member (a ridge), a plurality of dot-shaped members, and the like are formed on the inner surface of the connecting piece on the center direction side. Can be used.

The thickness, width, length, and thickness, width, length, shape, and number of the band-shaped adhesive layer can be variously set according to the purpose. The thickness, shape, number, interval, and the like of the plurality of dot-shaped pressure-sensitive adhesive layers can be variously set according to the purpose. As the adhesive layer, for example, a hot melt adhesive, an emulsion adhesive, an organic solvent adhesive, other adhesives, and the like can be used.

When the adhesive layer is formed on the inner surface on the center direction side of the reinforcing sheet, it can be automatically applied to a target application thickness, application width, and application shape using various application devices. . The expression that the connecting piece is directly or indirectly attached to the outer peripheral surface of the heat insulator, which is an object to be detachably adhered by the adhesive layer, means that the connection piece is directly adhered to the outer peripheral surface of the heat insulator. It refers to the case where it is adhered to the surface of a reinforcing sheet or skin sheet formed on the outer peripheral surface of the body (it is indirectly adhered to the outer peripheral surface of the heat insulator).

[0015]

【Example】

 An embodiment of the heat insulating cover of the present invention will be described with reference to FIGS. As shown in FIG. 1, the heat retaining cover 1 according to the first embodiment includes a tubular heat insulator 2, a reinforcing sheet 3, and a hot melt adhesive layer 4. The tubular heat insulator 2 is made of a heat insulating fiber such as glass wool or rock wool, has a thickness t1 of about 20 to 50 mm, a length L1 along the axial direction P (see FIG. 5) of about 1000 mm, and a pipe 5. It has a central hole 20 to be inserted and a slit 21 extending in the axial direction P forming an opening 210 into which the pipe 5 is inserted into the central hole 20, and insulates a side peripheral portion 50 of the pipe 5 through which the heat medium R flows. Things.

As shown in FIG. 1, the reinforcing sheet 3 includes a main body 3a and a connecting piece 3b. The main body 3a is large enough to cover the outer peripheral surface 22 of the heat insulator 2, and is integrally fixed to the outer peripheral surface 22 with an adhesive 23. The connecting piece 3b is formed integrally with one end 30 of the main body 3a, and extends from the one end 30 beyond the opening 210 of the slit 21 to cover the outer peripheral surface 321 on the other end 31 side of the main body 3a. An overlapping margin W (see FIGS. 2 and 3) is formed, which is detachably adhered by the adhesive layer 4 and can close the slit 21. The overlap margin W is about 35 to 65 mm.

The hot-melt adhesive layer 4 is provided on the inner peripheral surface 320 (the side facing the center hole 20 of the heat insulator 2) of the connecting piece 3 b superimposed on the outer peripheral surface 321 of the main body 3 a of the reinforcing sheet 3. It is applied in a band shape over a region L2 having a coating width w1 and a length L2 equal to the length L1 of the heat insulator 2 by an approximately coating device (see FIG. 2). The coating width w1 of the hot melt adhesive layer 4 is about 15 mm.

According to the heat retaining cover 1 of the embodiment configured as described above, the following effects can be obtained. That is, (1) the inner peripheral surface 320 of the connecting piece 3b of the reinforcing sheet 3 is formed from the one end 30 of the main body 3a through the opening 210 of the slit 21 after the hot melt adhesive layer 4 is applied. It can be temporarily fixed in a state of covering the outer peripheral surface 321 on the one end 31 side.

Therefore, there is no need to adhere the conventional release paper 60 (see FIG. 13) to the hot melt adhesive layer 4, and the manufacturing process can be simplified. (2) Since the conventional release paper 60 is not used, the material cost can be reduced accordingly. (3) In order to prevent the release paper 60 of the conventional double-sided tape 6 from being inadvertently peeled off and to prevent the slit 21 from opening as in the conventional case, the outer periphery of the heat insulating cover 1 is There is no need to tie it with a string, etc., and it is easy to handle after management of the thermal insulation cover 1 until it is used and when transporting it to the site of use. (4) When the heat insulating cover 1 is attached to the outer periphery 50 of the pipe 5 requiring heat insulation at the use site, at the time of the manufacturing, the one end 30 of the main body 3a passes through the opening 210 of the slit 21 and the main body 3a is closed. The slit 21 can be opened only by peeling the connecting piece 3b temporarily fixed to cover the outer peripheral surface 321 from the outer peripheral surface 321 of the main body 3a, and is inserted into the pipe 5 from the opened slit 21 and covered. Thereafter, the connecting piece 3b can be fixed again to the outer peripheral surface 321 of the main body 3a with the slit 21 closed.

[0020] For this reason, it is not necessary to perform the peeling operation of peeling the release paper from the adhesive area of the connecting piece as in the conventional case, so that the connecting piece 3b can be quickly moved to the outer peripheral surface 3 of the main body 3a. It can be permanently fixed by sticking to 21. In other words, at the site of use, the work of attaching the heat insulating cover 1 to the pipe 5 is reduced, so that it is possible to improve the workability. (5) Since release paper for protecting the adhesive layer 4 area of the connecting piece 3b is not required, release paper is not generated as garbage at the use site.

(Modification 1) Instead of forming the strip-shaped hot melt adhesive layer 4 on the inner side surface 320 of the reinforcing sheet 3 on the center direction side of the connecting piece 3b, as shown in FIGS. It is possible to form the (protrusion) adhesive layer 4a. In this case, the same effect as in the above embodiment can be obtained.

(Modification 2) Instead of forming the band-shaped hot melt adhesive layer 4 on the inner side surface 320 of the reinforcing sheet 3 on the center direction side of the connecting piece 3b, as shown in FIGS. The dot-shaped adhesive layer 4b can be formed. In this case, the same effect as in the above embodiment can be obtained.

[0023]

[Effect of the invention]

 The heat retaining cover according to the present invention includes a main body portion integrally joined and fixed to an outer peripheral surface of the heat insulating body, and at least one circumferential end formed integrally with the main body portion and projecting from one end defining the slit. A reinforcing sheet having a connecting piece that is directly or indirectly releasably adhered to the outer peripheral surface of the heat insulator on the end side and has a slit that closes the slit.

Therefore, according to the heat retaining cover of the present invention, the following effects can be obtained. That is, (1) a so-called temporary fixing state in which the unconnected pieces are directly or indirectly peelably adhered to the outer peripheral surface of the heat insulator at the time of manufacture and the slits are closed. Therefore, unlike the conventional case, the double-sided tape having the release paper does not need to be attached to the connecting piece, thereby simplifying the manufacturing process. (2) Since it is not necessary to use a release paper for protecting the adhesive area of the connecting piece, the material cost can be reduced. (3) It is not necessary to tie the outer periphery of the heat insulating cover with a string or the like so that the release paper of the double-sided tape stuck to the connecting piece is not inadvertently peeled off. It is easy to handle at the time of management after production and before use, and when transporting to the site of use. (4) At the site of use, when attaching a heat insulating cover to the outer periphery of a pipe requiring heat insulation, the connecting piece temporarily or directly attached to the outer peripheral surface of the heat insulator by adhesive at the time of the production is used. However, the slit can be opened simply by peeling off from the outer peripheral surface of the heat insulator, and the pipe is inserted and covered from the opened slit, the slit is closed again with the connecting piece, and the release paper is connected to the connecting piece. This eliminates the necessity of a peeling operation for peeling off from the adhesive region, so that the adhesive region of the connecting piece can be quickly and permanently adhered to the outer peripheral surface of the heat insulator by this amount.

That is, at the site of use, the work of attaching the heat insulating cover to the pipe is reduced, and the workability can be improved. (5) Since release paper for protecting the adhesive area of the connecting piece is not required, release paper is not generated as garbage at the place of use.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view showing an enlarged main part of a heat retaining cover according to an embodiment.

FIG. 2 is a developed perspective view showing a process of forming a hot-melt adhesive layer on a connecting piece of a reinforcing sheet of the heat retaining cover in FIG.

FIG. 3 is a side view showing a state where the connecting pieces of the reinforcing sheet are temporarily fixed at the time of manufacturing the heat retaining cover in FIG. 1;

FIG. 4 is an enlarged perspective view showing a part of a state in which a connecting piece of a reinforcing sheet is peeled off when the heat retaining cover in FIG. 3 is used.

FIG. 5 is a perspective view showing the whole of a heat retaining cover and a tube to which the heat retaining cover is attached in FIG. 3;

FIG. 6 is a perspective view showing a state in which the heat retaining cover in FIG. 5 is attached to the tube and the connecting pieces of the reinforcing sheet are permanently fixed.

FIG. 7 is an enlarged side view showing a state in which the connecting pieces of the reinforcing sheet in FIG. 6 are permanently fixed.

FIG. 8 is a developed perspective view showing a process of forming a hot-melt pressure-sensitive adhesive layer on a connection piece of a reinforcing sheet in Modification Example 1 corresponding to FIG. 2;

FIG. 9 is an enlarged perspective view showing a part of a state in which a connecting piece of a reinforcing sheet is peeled off when the heat retaining cover in FIG. 8 is used.

FIG. 10 is a developed perspective view showing a process of forming a hot-melt pressure-sensitive adhesive layer on a connection piece of a reinforcing sheet in Modification 2 corresponding to FIG. 2;

11 is an enlarged perspective view showing a part of a state in which a connecting piece of a reinforcing sheet is peeled off when the heat retaining cover in FIG. 10 is used.

FIG. 12 is a perspective view showing a conventional heat retaining cover and a tube to which the heat retaining cover is to be attached.

FIG. 13 shows a double-sided tape 6 when using a conventional heat insulating cover.
FIG. 5 is an enlarged side view showing a work state in which the release paper 60 of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Thermal insulation cover 2 ... Cylindrical heat insulating material 3 ... Reinforcement sheet 3a ... Main part of reinforcement sheet 31 ...
Connecting piece of reinforcing sheet 4 Hot melt adhesive layer 5 Tube to be thermally insulated

Claims (4)

[Utility model registration claims] 1. A tubular heat insulator for covering a pipe having a center hole through which the pipe is inserted, an axially extending slit forming an opening for inserting the pipe into the center hole, and an integral part of an outer peripheral surface of the heat insulator. A main body portion joined and fixed to the main body portion, and at least one circumferential end is protruded from one end defining the slit and directly or on the outer peripheral surface of the heat insulator on the other end side defining the slit. A reinforcing sheet having a connecting piece that is indirectly peelably adhered and closes the slit. 2. The thermal insulation cover according to claim 1, wherein the connecting piece of the reinforcing sheet has a band-shaped adhesive layer formed on an inner surface on the center direction side of the connecting piece. 3. The thermal insulation cover according to claim 1, wherein the connecting piece of the reinforcing sheet has a linearly formed adhesive layer on an inner surface on the center direction side of the connecting piece. 4. The thermal insulation cover according to claim 1, wherein the connecting piece of the reinforcing sheet has a plurality of dot-shaped adhesive layers on an inner surface on the center direction side of the connecting piece.