JP3174116B2 - Method and apparatus for producing coated heat-insulated tubular body with skin sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as a heat insulating member for covering an outer peripheral portion of a heat-insulated pipe such as a heat medium feeding pipe for air conditioning, and has a slit formed in a pipe length direction. The present invention relates to a method for manufacturing a coated heat insulating tubular body with a skin sheet and an apparatus therefor.

[0002]

2. Description of the Related Art A coated heat-insulated tubular body of this type is made of a foamed resin and has a slit formed in the longitudinal direction of the pipe. A skin sheet is adhered, and the skin sheet has a configuration in which a fin-shaped portion having an unpeeled separator (remaining separator) is formed at one end in the sheet width direction.

[0003] Therefore, since the thickness of the thick-walled tube body can be freely expanded and reduced, if the diameter of the tube to be insulated is within a predetermined range, the tube to be insulated can be easily covered with various sizes. And, if it is adhered so as to cover the slit portion with the fin-shaped portion from which the remainder of the separator has been peeled off, it is possible to easily and firmly integrate the heat-insulated tube and the thick-walled tube. I have.

Conventionally, this kind of method for manufacturing a coated heat-insulated tube is generally performed by a typical manual operation. Specifically, as shown in FIG. Rolls A, B, and C (first to third rolls) are provided in parallel with each other and each axis can be arranged at the apex of the triangle, and two (second and third) of them are provided. Roll B, C
Are arranged side by side in a substantially horizontal work surface, and the other (first) roll A is provided so as to be movable in the direction indicated by the arrow p in FIG. .

In order to use the apparatus having such a configuration, first, a first worker moves the first roll A in the direction of the arrow p. Next, as shown in FIG. 11, a skin sheet D cut to a predetermined width and a predetermined length is prepared, and the second worker leaves the fin-shaped portion Db at one end in the sheet width direction of the separator E. That is, the portion Eb (peeling portion) other than the separator remaining portion Ea is peeled along the peeling slit S, and the adhesive applied portion Da corresponding to the peeling portion Eb is exposed.

Subsequently, as shown in FIG. 11, the skin sheet D is placed with the exposed pressure-sensitive adhesive-coated portion Da facing upward, and the other end in the sheet width direction, ie, the separator remaining portion Ea. The second roll B is positioned such that the opposite end is located on the roll surface of the second roll B.

After that, a cylindrical tube F made of a foamed resin is placed between the two rolls B and C so that the tube length direction is the same between the two rolls B and C.
Are placed along the roll length direction.

Next, the separated first roll A is brought closer to the second and third rolls B and C, and the roll surface of the roll A is brought into contact with the cylindrical tube body F. The second roll B is rotated. Thereby, the cylindrical tube F is rotated together with the other rolls A and C, and the adhesive exposed portion Da of the skin sheet D is adhered to the outer surface of the tube F. When the entire adhesion of the adhesive exposed portion Da is completed, the first roll A is moved again in the direction of the arrow p to take out the products on the second and third rolls B and C.

[0009]

However, according to the above-mentioned conventional method, all of the work is predominantly performed by hand, and in order to improve productivity, the work ability of the two workers must be reduced. It is necessary to increase the work capacity, and there is a limit to the work capacity, a certain training period is required to secure a certain work capacity, and as the work capacity is increased,
Workers are subjected to severe physical labor.

The length of the product is determined by the rolls A, B,
C is limited by the length of at least each roll A,
Rolls longer than the roll lengths of B and C cannot be manufactured.

As described above, the configuration of the above-described conventional apparatus has problems not only in terms of mass productivity but also in terms of the health management of workers, the degree of freedom in product specifications, and the like. There is a limit.

On the other hand, the conventional skin sheet has an adhesive exposed portion D
A separator E is affixed to the entire surface of a, and the separator E, at least the peeled portion Eb, is to be discarded when used as a coated heat insulating tubular body, and the discarded separator performs some disposal. There is a need. Therefore, the number of processing steps increases and the cost increases.

According to the present invention, there is provided a foamed resin tube with a skin sheet which can be manufactured fully automatically and with improved mass productivity, can further reduce the number of processing steps, and can realize cost reduction. It is an object of the present invention to provide a method for manufacturing a body and a device therefor.

[0014]

In order to achieve the above object, according to the first aspect of the present invention, a sheet body made of a foamed resin having a predetermined sheet width is fed out in a sheet length direction, and a separator is attached to one sheet surface. The skin sheet is fed out in the sheet length direction, and the separator is peeled off along the sheet length direction so that a part of the separator sheet remains at a predetermined width at one end in the sheet width direction. The sheet body is laminated on a surface, and the sheet body is curved and deformed such that both ends of the sheet body in the sheet width direction are substantially abutted, and the abutted both ends are thermally fused. Then, the cylindrical body obtained by the heat fusion is cut along the vicinity of the inside of the base of the remaining separator to form a C-shaped cross section.

[0015]

According to a second aspect of the present invention, a sheet body made of a foamed resin having a predetermined sheet width is fed out in the sheet length direction, an adhesive is applied to one sheet surface side, and a release agent is applied to the other sheet surface side. The coated skin sheet is fed out in the sheet length direction, the sheet body is laminated on the pressure-sensitive adhesive applied surface of the skin sheet, and the fin portion is positioned from the pressure-sensitive adhesive applied surface side to the release agent applied surface side. Folded so that both ends in the sheet width direction of the laminated sheet body substantially abut each other,
In addition, the skin sheet is bent and deformed so that it is on the outside, the both ends are heat-sealed, and the cylindrical tube obtained by the heat-sealing is cut along the vicinity of the inside of the base of the fin-shaped portion. It is characterized by the following.

According to a third aspect of the present invention, there is provided a heat insulating sheet feeding means for feeding a foamed resin sheet having a predetermined sheet width in a sheet length direction, an adhesive is applied to one sheet surface, and the other sheet surface is provided. A skin sheet sending means for feeding out a skin sheet coated with a release agent in a sheet length direction, a laminating means for sticking the sheet body to an adhesive applied surface except for a fin-shaped part of the skin sheet, A fin folding means for folding the attached fin-shaped portion from the pressure-sensitive adhesive application surface side to the release agent application surface side, and a fin folding means provided subsequent to the fin folding means, and a sheet body in the laminate. Bending deformation means for bending and deforming both ends of the sheet in the sheet width direction so as to substantially abut each other and the skin sheet to the outside, and thermally melting the both ends of the bent and deformed sheet body. And heat-sealing means for forming the cylindrical tube into a cylindrical tube, and slit forming means for cutting the cylindrical tube in the tube radial direction along the inside of the base of the fin-shaped portion. It is characterized by.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the skin sheet sending means is provided with a heat retaining means capable of setting an atmosphere at a predetermined temperature.

[0019]

According to the first aspect of the present invention, when the sheet body made of foamed resin is fed out in the sheet length direction from the sheet body sending means and the skin sheet is fed out from the skin sheet sending means, the separator is separated from the separator by the peeling means. As a result, the sheet is peeled while leaving a fin-shaped portion at one end in the sheet width direction. Subsequently, the skin body sheet is adhered to the pressure-sensitive adhesive exposed portion exposed by peeling of the separator by the laminating means to form a laminate. The sheet body of the laminated body is in a state where the sheet width direction is substantially abutted when passing through the bending deformation means, and the abutted both ends are heat-fused by the heat fusing means to be provided with the fin-shaped portion. Cylindrical tube. The cylindrical pipe body is drawn in the pipe length direction by a take-off molding means, and the taken-out cylindrical pipe body is cut by a slit portion forming means so as to be along the vicinity of the inside of the base of the fin-shaped portion, and then appropriately cut off. When cut into a tube length, a coated heat-insulated tubular body with a skin sheet as a product is obtained.

[0020] In the claims 2 or invention of claim 3, firstly,
The foamed resin sheet body is fed out in the sheet length direction from the sheet body delivery means, and the skin sheet is delivered from the skin sheet delivery means.
That is, an adhesive is coated on one sheet side, and
A sheet having a release agent applied to the other sheet side is fed out in the sheet length direction. Subsequently, the sheet body faces and is adhered to the pressure-sensitive adhesive applied surface except for the fin-shaped portion on the skin sheet by the laminating means to form a laminate. The laminate is such that both ends in the sheet width direction of the sheet body substantially abut in a state where the fin-shaped portion is folded by the fin folding means on the side opposite to the pressure-sensitive adhesive applied surface, and the skin sheet is It is curved and deformed by the curve deforming means so as to be on the outside, and the butted ends are heat-sealed by the heat-sealing means. The cylindrical tube obtained by the heat-sealing is taken up by a take-off forming means, and thereafter cut by a slit forming means along the vicinity of the inside of the base of the fin-shaped portion in the cylindrical tube, and coated. It becomes an insulated tubular body.

According to a fourth aspect of the present invention, in the third aspect of the present invention, when the skin sheet sending means is provided with a heat retaining means, the adhesive of the skin sheet can be held in an appropriate active state when the sheet bodies are laminated.

[0022]

FIG. 1 shows a first embodiment of a manufacturing apparatus according to the present invention, in which a sheet supply reel 1 which constitutes a sheet sending means made of foamed resin, and a skin sheet supply which constitutes a skin sheet sending means. Reel 2, peeling roll 3 constituting peeling means, and a pair of pressing rolls 4a, 4 constituting laminating means
b, the primary forming guide 5 and the secondary forming guide constituting the bending deformation means, the sealing blade 7 constituting the heat fusing means, the forming belt 8 constituting the take-off forming means, and the split mechanism 19 constituting the slit forming means. Approximately.

The supply reel 1 is wound with a sheet 9 of a predetermined thickness (for example, 10 [mm]) made of, for example, foamed polyethylene, and the sheet 9 taken out from the supply reel 1 is connected to a relay roll 10. , 11 and 12 to enter between the pressure rolls 4a and 4b.

The supply reel 2 is wound with a skin sheet 13 having a thickness of, for example, polyvinyl chloride as a base material and having a thickness of 40 to 300 [μm].
An adhesive (acrylic-based adhesive) is applied to one surface side of the sheet No. 3 and a separator 14 is attached to a surface to which the adhesive is applied. Is formed with a peeling slit (see reference numeral S in FIG. 11) along the sheet length direction of the skin sheet 13, that is, along the feeding direction.

The skin sheet 13 fed from the supply reel 2 is connected to the pressing roll 4 via a relay roll 15.
a and the separation part 14 of the separator 14 separated by the separation roll 3
b is wound around the collection reel 16.

Further, delivery rolls 17a and 17b are provided downstream of the pressing rolls 4a and 4b, and the primary forming guide 5 is provided downstream of the delivery rolls 17a and 17b.
The primary forming guide 5 is provided with the seal blade 7 for heat fusion.

The secondary molding guide 6 is provided downstream of the primary molding guide 5.
The forming belt 8 is provided on the downstream side of. The forming belt 8 has upper and lower traveling belts 8A and 8B, the upper traveling belt 8A is wound around pulleys 8a and 8b, and the lower traveling belt 8B is connected to pulleys 8c and 8d.
It is wound around. Note that a heater 5A is provided upstream of the primary forming guide 5.

Furthermore, the middle split Organization 19 on the downstream side is provided in the molding belt 8, intermediate split Organization 19 is constituted by a disk blade 19a.

FIG. 2 shows the configuration near the primary molding guide 5 and the secondary molding guide 6 in more detail, while FIG. 3 shows the configuration of the primary molding guide 5 in more detail. It is.

The primary forming guide 5 has a trumpet tubular shape as a whole, and has an expanded portion 5c which is expanded in a hem-cracked shape from a middle portion toward an upstream end portion, and an expanded portion 5c which extends from the middle portion to an upstream end portion. And a guide hole 5a having a circular cross section. A slit 5b is formed in the longitudinal direction substantially at the center of the upper surface of the guide hole 5a, and a seal blade 7 is formed in the slide hole 5b.
Is inserted. The seal blade 7 is fixed by appropriate means, and is heated by electric current or the like so as to come into contact with an end 9A of the sheet member 9 along the sheet length direction (see FIG. 4).

A guide hole 5a having a semicircular cross section is formed inside the secondary forming guide 6, and the radius of the guide hole 5a is reduced from the downstream side toward the upstream side. The curved surface faces the lower side.

In the upper traveling belt 8A and the lower traveling belt 8B, forming holes 8Aa and 8Ba having a semicircular cross section are formed so as to face each other .
A circular guide hole is formed between 8Ba . In the present embodiment, basically, an off-the-shelf apparatus used for forming a tube from a sheet body can be used.

Next, the operation of the present embodiment configured as described above will be described. A sheet body 9 having a predetermined sheet width is fed out from the supply reel 1 and a skin sheet 13 is fed out from the supply reel 2, and the skin sheet 13 is separated from the separation portion 14 b of the separator 14 when passing through the separation roll 3.
Is peeled off along the peeling slit, thereby exposing the pressure-sensitive adhesive applied surface 13a (see FIG. 3).

When the sheet body 9 and the skin sheet 13 pass through the pressing rolls 4a and 4b, the sheet body 9 is laminated on the pressure-sensitive adhesive applied surface 13a of the skin sheet 13, and the laminated body is formed. After passing through the delivery rolls 17a and 17b, is inserted into the primary forming guide 5.

When the laminate is inserted into the primary forming guide 5, the peeling portion 14b of the skin sheet 13 is peeled off, so that one end of the sheet body 9 in the sheet width direction has a sheet length. A fin-like portion 13b is formed along the direction (see FIG. 3), and a separator remaining portion 14a is attached to the fin-like portion (see FIG. 4).

Accordingly, in the primary forming guide 5, the laminated body is easily bent and deformed along the inner surface of the primary forming guide 5 because the sheet body 9 is heated by the heater 5A to be in a soft state.

Further, when the laminated body passes through the primary forming guide 5, the sealing blade 7 comes into contact with one end 9A of the sheet body 9 in the sheet width direction (see FIG. 4).
Is in a molten state, and can be thermally fused with the other end that abuts. In this case, the sealing blade 7 and the fin 13
In order to avoid contact with b, the fin-like portion 13b is set up from the base thereof.

When the laminated body passes through the guide hole 5a which is the downstream end of the forming guide 5, it becomes a substantially complete cylindrical tube body. Then, the heat-sealed portion of the portion enters the forming belt 8 in a state where it is more sufficiently joined.

The cylindrical tube passing through the secondary forming guide 6 passes between the running belts 8A and 8B constituting the forming belt 8, and at this time, between the forming holes 8Aa and 8Ba of both belts 8A and 8B. The primary semi-finished product tube 18 is formed by running in the pressure state. In addition, since the primary semi-finished product tube 18 is pressed and formed by the forming holes 8Aa and 8Ba of both belts 8A and 8B, the roundness is increased.

The thus formed primary semi-finished product tube 18 is cut into slit portions 9a along the vicinity of the heat-sealed portion, that is, near the base of the fin-shaped portion 13b. Is formed. Thereby, the secondary semi-finished product tube 30 is formed. The length in the pipe length direction is cut into a pipe length according to the specification by an appropriate pipe cutting means to form a coated heat-insulating tubular body 32 as the product.

FIG. 5 shows an example of the use of the coated heat-insulating tubular body 32. At the time of molding, the sheath heat insulating tubular body 32 has a fin-shaped portion 13b and a separator remaining portion 14a attached thereto. However, at the time of use, the slit portion 9a is expanded to insert a heat-insulated tube, and then the separator remaining portion 14a is peeled off. . If the fin-shaped portion 13b where the adhesive is exposed by the peeling is overlaid on the back surface of the facing skin sheet 14, the heat-insulated tube 33 can be easily fixed.

FIG. 6 shows a second embodiment of the manufacturing apparatus according to the present invention. This embodiment is significantly different from the first embodiment in that a skin sheet 28 having no separator is used.

FIG. 7 shows the structure of the skin sheet 28 used in the present embodiment (the vicinity of the end of the sheet is exaggerated for easy understanding). For example, it is made of polyvinyl chloride and has a thickness of 40 to
A sheet substrate 28a of 300 [μm], and an acrylic pressure-sensitive adhesive layer 28b applied on one surface thereof,
And a release treatment layer 28c applied to the other surface side.

The skin sheet 28 is wound around the supply reel 2, and the supply reel 2 is provided with a heat insulation box 20 as heat insulation means. Further, on the downstream side of the supply reel 2, a pair of upper and lower delivery rolls
1, 22 and 23, 24 are provided, roll 21, 22 feed the upper stream side and the downstream side of the feed roll 23,2
4, a plain roll 2 serving as a wrinkle preventing means
5 are provided.

The supply reel 2 is disposed in a heat insulation box 20, and the inside of the heat insulation box 20 can be maintained at, for example, a certain temperature range of normal temperature (20 ° C. ± 5 ° C.). . The same effect can be obtained by attaching the heat retaining box 20 to the supply reel 2 in the configuration of the first embodiment.

Further, near the skin sheet supply reel 2, a fin tape supply reel 2 serving as a fin tape sending means is provided.
7 are provided, and the fin tape supply reel 27 is
Filler tape 26 is directed toward the delivery rolls 23 and 24.
Is configured to be paid out.

The fin tape 26 is used for the skin sheet 1.
3 is a tape narrower than that of
Passes between 3,24 are adapted to be adhered to <br/> adhesive layer 28b of the end portion in the sheet width direction of the skin sheet 28.

The pressing rolls 4a and 4b serving as laminating means
On the downstream side of the fin portion folding means, that is, the skin sheet 28
Is provided with a folding roll mechanism 29 for folding the fin tape 26 adhered to the tape.

The pair of delivery rolls 21, 22,
Of及beauty 23, the former roll 21, 22 has a take-up function of the epidermis <br/> sheet 28, one roll 21
Is subjected to Teflon processing on its outer peripheral surface. By the Teflon processing, the sticking phenomenon of the pressure-sensitive adhesive layer 28b can be prevented.

The latter rolls 23 and 24 are made of
To give a predetermined take-off force to the
The outer peripheral surface of one roll 23 is subjected to Teflon processing like the roll 21.

A plain roll 25 is provided on the downstream side of the feed rolls 23, 24, and the pressing rolls 4a, 4b provided on the downstream side of the feed rolls 23, 24 and the plain roll 25. (For example, when the pulling force of the pressing rolls 4a, 4b is set to 1, the feeding rolls 23, 24 have a pulling force of 0.85 to 1.0, that is, The take-off force on the downstream side is set stronger).

Further, a fin folding mechanism 29 as a fin folding means is provided downstream of the pressing rolls 4a and 4b. FIG. 8 shows the details of the configuration of the fin folding mechanism 29. A pair of horizontal rolls 29a,
9b and a pair of vertical rolls 29c, 29d. One of the vertical rolls 29d has a main folding function of the fin-like portion 26b formed by the fin tape 26.

In FIG. 6, the secondary molding guide 6
The illustration of the downstream side configuration, the forming belt, the split mechanism, etc. is omitted, and the same or equivalent configurations as those of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

Since the second embodiment is configured as described above, the sheet reel 9 having a predetermined sheet width is supplied from the supply reel 1.
Is fed out from the supply reel 2, and the skin sheet 28 is fed out from the supply reel 2, and
6 is paid out. In this case, since the skin sheet 28 is fed out of the heat retaining box 20, the developing force is maintained at a substantially constant value (for example, 0.3 [kg / cm]).

As a precautionary measure, the developing force of the skin sheet 28 is 0.5 [kg / cm] when the ambient temperature is -5 ° C, and 0.27 [kg / cm] when the ambient temperature is 30 ° C. ]
Large variation occurs in the condition, and the elongation of the sheet 28 varies.

The skin sheet 28 fed out of the heat retaining box 20 passes through the delivery rolls 21 and 22 and is inserted between the delivery rolls 23 and 24 on the downstream side. At this time, one end of the skin sheet 28 in the sheet width direction is provided. A fin tape 26 is attached to the portion, that is, a fin-shaped portion 26b is formed.

The skin sheet 28 that has passed through the feed rolls 23 and 24 can be prevented from wrinkling due to sufficient surface contact with the plain roll 25.

The skin sheet 28 that has passed through the feed rolls 23 and 24 and the plain roll 25 is fed so that the sheet body 9 faces the adhesive layer 28b.
It is inserted between the pressing rolls 4a and 4b to form a laminate.

In this case, the pulling force of the pressing rolls 4a and 4b is set to be larger than the pulling force of the feed rolls 23 and 24, and the skin sheet 28 is subjected to the action of extending in the sheet length direction. The skin sheet 28 can be extended in advance according to the amount of contraction of the sheet body 9 after cooling. Note that the amount of extension is determined by the relationship with the amount of extension of the sheet member 9 due to the heating of the heater 5A.

Then, the laminated body that has passed through the pressing rolls 4a and 4b is supplied to a fin folding mechanism 29, and the fin folding mechanism 29 causes the fin-shaped portion 2 to be supplied.
6b is folded back to the anti-adhesive layer side and the delivery roll 1
It is inserted between 7a and 17b.

Therefore, even if the laminated body having passed the delivery rolls 17a and 17b is heated in the primary molding guide 5 by the sealing blade 7 so that the end of the sheet member 9 is in a hot-melt state, the sealing blade 7 is not fin-shaped. It does not come into contact with 26b. That is, the fin portion 26b is not burned.

As described above, in the second embodiment, the skin sheet 2
Since the separator 8 does not use a separator, it is expected that at least the operation of the separator disposal process can be omitted.

[0063]

As described above, according to the first aspect of the present invention,
A sheet body made of a foamed resin having a predetermined sheet width is fed out in the sheet length direction, and a skin sheet having a separator attached to one sheet surface is fed out in the sheet length direction. The separator is peeled off along the sheet length direction so as to remain, and the sheet body is laminated on the pressure-sensitive adhesive applied surface of the skin sheet exposed by the peeling, so that the skin sheet is on the outside, and the sheet The both ends of the body in the sheet width direction are curved and deformed so as to substantially abut each other, the abutted both ends are heat-sealed, and the cylindrical tube obtained by the heat-sealing is attached to the root of the remaining separator. It is characterized by being cut along the vicinity of the inside, so that human labor can be eliminated as much as possible as a whole, and it can be performed continuously, and at least there is no restriction on the pipe length, and mass productivity is improved. It can contribute. Therefore, a specially trained operator is not required as in the related art, and a uniform product can be manufactured with high efficiency.

[0064]

According to the second aspect of the present invention, a sheet of foamed resin having a predetermined sheet width is fed out in the sheet length direction, one of the sheet surfaces is coated with an adhesive, and the other is separated to the sheet surface. The surface sheet to which the mold agent has been applied is fed out in the sheet length direction, a fin tape having a predetermined width is fed out in the tape length direction along the feeding direction of the skin sheet, and one end in the sheet width direction on the adhesive applied surface of the skin sheet. The fin tape is attached, and the sheet body is laminated on the pressure-sensitive adhesive applied surface of the skin sheet excluding the attached portion of the fin tape, and the fin tape is positioned from the adhesive applied surface side to the release agent applied surface side. Folded so that both ends of the laminated sheet body in the sheet width direction substantially abut each other,
In addition, the outer skin sheet is curved and deformed so as to be on the outside, the both ends are heat-sealed, and the cylindrical tube obtained by the heat-sealing is cut along the vicinity of the inside of the base of the fin tape. As a feature, the manual operation as much as possible can be omitted as in the first aspect of the present invention, and the separator in the first aspect of the present invention can be omitted. (Exfoliation work, disposal work), it is possible to reduce the work load, thereby realizing cost reduction. Also,
By omitting the separator, a long skin sheet can be wrapped around the reel, and the frequency of replacing the skin sheet can be reduced, and the work efficiency can be improved.

According to the third aspect of the present invention, there is provided a heat-insulating sheet feeding means for feeding a sheet made of a foamed resin having a predetermined sheet width in the sheet length direction, and one of the sheet surfaces is coated with an adhesive and the other is coated with an adhesive. A skin sheet sending means for feeding out a skin sheet having a release agent applied to a sheet surface in a sheet length direction,
Fin tape sending means for feeding out a fin tape for peeling of a predetermined width in the tape length direction; fin tape attaching means for sticking the fin tape on one side in the sheet width direction of the surface of the skin sheet on which the adhesive is applied; A laminating means for affixing the sheet body to the pressure-sensitive adhesive-coated surface of the sheet except for the portion where the fin tape is stuck; and a fin which folds the pasted fin tape from the pressure-sensitive adhesive-coated surface to the release agent-coated surface. Folding means, provided so as to be subsequent to the fin folding means, so that both ends in the sheet width direction of the sheet body in the laminated body substantially abut each other, and for bending and deforming so that the skin sheet is located outside. Bending deformation means, heat-sealing means for heat-sealing the both end portions of the curved-deformed sheet body to form a cylindrical tube body, and A slit portion forming means for cutting into the pipe diameter direction along the inside of the base of the Retepu,
Therefore, the invention of claim 2 can be easily and specifically implemented, and can contribute to cost reduction.

According to a fourth aspect of the present invention, since the skin sheet according to the third aspect of the present invention is arranged in an atmosphere of a predetermined temperature, the developing force of the wound skin sheet or the sheet is increased. The sticking force to the body can be kept constant without being affected by external conditions, which contributes to the stretching of the skin sheet and the prevention of wrinkling.

[Brief description of the drawings]

FIG. 1 shows a first example of an apparatus in which the manufacturing method of the present invention is implemented.
FIG. 2 is a schematic side view illustrating a configuration of an example.

FIG. 2 is a sectional view showing details in the vicinity of a primary forming guide of FIG. 1;

FIG. 3 is a plan view of a primary forming guide taken along line XX of FIG. 2;

FIG. 4 is a sectional view taken along the line YY of FIG. 2;

FIG. 5 is a cross-sectional view showing an example of use of the coated heat insulating tubular body.

FIG. 6 is a schematic side view illustrating a configuration of a manufacturing apparatus according to a second embodiment of the present invention.

FIG. 7 is a partially enlarged schematic perspective view showing the structure of a skin sheet used in the manufacturing apparatus according to the second embodiment.

FIG. 8 is a front view showing a configuration of a fin folding mechanism along a line PP in FIG. 7;

FIG. 9 is a sectional view taken along the line QQ in FIG. 7;

FIG. 10 is a side view showing a configuration of a conventional manufacturing apparatus.

FIG. 11 is a perspective view showing a peeled state of the skin sheet of FIG. 10 ;

[Explanation of symbols]

 1 sheet body supply reel (sheet body delivery means), 2 skin sheet supply reel (skin sheet delivery means), 3 peeling roll (peeling means), 4a, 4b pinching roll (lamination means), 5 primary forming guide (curved deformation) 7) Sealing blade (heat fusing means), 8 Forming belt (take-off forming means), 13 Skin sheet, 13b Fin-like portion, 14 separator, 18 Primary semi-finished product tube, 19 Middle split mechanism (Slit section forming means) , 20 heat retention box (heat retention means), 26 fin tape, 26b fin-like portion, 28 skin sheet, 28a skin sheet substrate, 28b adhesive layer, 29 fin folding mechanism (fin folding means), 30 secondary semi-finished product tube 32 Coated heat insulating tubular body, 33 Insulated tube.

Claims (4)

(57) [Claims] 1. A sheet body made of a foamed resin having a predetermined sheet width is fed out in the sheet length direction, a skin sheet having a separator attached to one sheet surface is fed out in the sheet length direction, and one end in the sheet width direction is put on one end. The separator is peeled along the sheet length direction so that the portion remains at a predetermined width, and the sheet body is laminated on the pressure-sensitive adhesive applied surface of the skin sheet exposed by the peeling so that the skin sheet is on the outside. And, the sheet body is curved and deformed so that both ends in the sheet width direction are substantially abutted, and the abutted both ends are heat-sealed, and the cylindrical tube obtained by the heat-sealing is left. A method for producing a coated heat-insulated tubular body with a skin sheet, characterized in that cutting is performed along the vicinity of the inside of the base of the separator. 2. A skin in which a foamed resin sheet body having a predetermined sheet width is fed out in a sheet length direction, and an adhesive is applied to one sheet surface side and a release agent is applied to the other sheet surface side. The sheet is fed out in the sheet length direction, the sheet body is laminated on the pressure-sensitive adhesive applied surface of the skin sheet, and the fin portion is folded back to be positioned from the pressure-sensitive adhesive applied surface side to the release agent applied surface side, The laminated sheet body is curved and deformed so that both end portions in the sheet width direction substantially abut each other, and the skin sheet is curved outward so that the both end portions are heat-fused, and obtained by the heat fusion. A method for producing a coated heat-insulating tube with a skin sheet, wherein the cylindrical tube is cut along the vicinity of the inside of the base of the fin-shaped portion. 3. A heat-insulating sheet body feeding means for feeding out a foamed resin sheet body having a predetermined sheet width in a sheet length direction, an adhesive applied to one sheet surface, and a release agent applied to the other sheet surface. A skin sheet sending means for feeding out the applied skin sheet in the sheet length direction, a laminating means for sticking the sheet body on an adhesive-coated surface of the skin sheet except for a fin-shaped part to be stuck, and the fin tape attached. Fin fold means for folding back so as to be located on the release agent application surface side from the pressure-sensitive adhesive application side, and provided following the fin fold means, and both ends in the sheet width direction of the sheet body in the laminate are provided. A curved deformation means for bending and deforming the skin sheet so as to substantially abut and the outer skin sheet to the outside, and heat-fusing the both ends of the bent and deformed sheet body to form a cylindrical tube body. A skin sheet comprising: a heat-sealing means for forming; and a slit forming means for cutting the cylindrical tube body in a tube radial direction along an inner side of a base of the fin-shaped portion. Equipment for manufacturing coated heat-insulated tubular bodies. 4. Oite to claim 3, epidermal sheet delivery means, apparatus for manufacturing a surface sheet with coated insulation tubular body, wherein a settable thermal insulation means to an atmosphere of a predetermined temperature is provided.