Method of manufacturing planar heater, planar heater and heating device

Abstract

To provide a method of manufacturing a planar heater comprising a plurality of electric heating warp threads which generate heat when a current flows and arranged in one direction and weft threads constituting belt-like fabric together with the electric heating warp threads such that electric heating warp threads of the planar heater are less broken, and the planar heater and a heating device.SOLUTION: A method of manufacturing a planar heater comprises: a carrying step of carrying a belt-like body 30, which extends in an orthogonal direction orthogonal to one direction, in the orthogonal direction, wherein the belt-like body has a plurality of electric heating warp threads generating heat when a current flows and arranged in the one direction and one weft thread constituting fabric 34 together with the electric heating warp threads; and an electrode connecting step of connecting an electrode 29 to the belt-like body in contact with the plurality of electric heating warp threads.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing a planar heater, a planar heater, and a heating device. [Background technology]

[0002] Patent Document 1 below discloses an invention in which a planar heater is provided as a heating device inside a vehicle seat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-009048 Summary of the Invention [Problem to be solved by the invention]

[0004] Here, we consider the case where a planar heater of a predetermined width is constructed using a plurality of electrically heated warp yarns that generate heat when electricity flows through them and are arranged in one direction, and weft yarns that, together with the electrically heated warp yarns, form a strip-shaped fabric.

[0005] When manufacturing a sheet heater that is a woven fabric of a predetermined width, there is a risk that each electric heating warp thread will break.

[0006] In consideration of the above facts, the present invention aims to provide a method for manufacturing a planar heater, a planar heater, and a heating device that can reduce the risk of breakage of the electric heating warp threads in a planar heater that comprises a plurality of electric heating warp threads that generate heat when electricity flows and are arranged in one direction, and weft threads that form a strip-shaped fabric together with the electric heating warp threads. [Means for solving the problem]

[0007] The method for manufacturing a plane heater according to the invention of claim 1 includes a conveying step of conveying a strip in the orthogonal direction, the strip having a plurality of electric heating warp yarns that generate heat when electricity flows through them and that are arranged in one direction, and a single weft yarn that forms a woven fabric together with the electric heating warp yarns, and the strip extending in an orthogonal direction that is orthogonal to the one direction; and an electrode connecting step of connecting electrodes to the strip so that the electrodes are in contact with the plurality of electric heating warp yarns.

[0008] In the method for manufacturing a planar heater described in claim 1, a strip having a plurality of electric heating warp yarns arranged in one direction and generating heat when electricity flows therethrough, and a single weft yarn that forms a woven fabric together with the electric heating warp yarns, and extending in an orthogonal direction perpendicular to the one direction, is transported in the orthogonal direction. Furthermore, electrodes are connected to the strip so as to contact the plurality of electric heating warp yarns. That is, the method for manufacturing a planar heater described in claim 1 does not include a step of changing the width of the strip (planar heater) to a predetermined width by cutting the strip along the orthogonal direction. Therefore, the method for manufacturing a planar heater described in claim 1 can reduce the risk of breakage of the electric heating warp yarns of a planar heater having a plurality of electric heating warp yarns arranged in one direction and generating heat when electricity flows therethrough, and a weft yarn that forms a woven fabric together with the electric heating warp yarns.

[0009] The method for manufacturing a plane heater according to the invention described in claim 2 is the method for manufacturing a plane heater according to claim 1, in which the strip transported in the transport step is provided with a backing that extends in the perpendicular direction and temporarily holds the heated warp yarns and the weft yarns on one side, and includes a separation step of separating the backing from the heated warp yarns and the weft yarns.

[0010] The method for manufacturing a sheet heater described in claim 2 includes a conveying step in which the conveyed strip is provided with a backing sheet that extends in the orthogonal direction and temporarily holds the electrically heated warp and weft yarns on one side, and a separating step in which the backing sheet is separated from the electrically heated warp and weft yarns, making it easy to manufacture a sheet heater while maintaining the positional relationship of the electrically heated warp yarns.

[0011] The method for manufacturing a planar heater according to the invention described in claim 3 is the method for manufacturing a planar heater described in claim 1 or claim 2, wherein the electrode is strip-shaped extending in the one direction, and includes a cutting step of cutting the strip and the electrode along a cutting line that is a straight line passing through the center of the electrode in the width direction in the one direction.

[0012] In the method for manufacturing a planar heater according to claim 3, the electrode is a strip extending in one direction, and a cutting step is included in which the strip and the electrode are cut along a cutting line that is a straight line passing through the center of the electrode in one direction in the width direction, thereby making it possible to manufacture two electrodes in one cutting step.

[0013] The planar heater of the invention described in claim 4 comprises a plurality of electric heating warp yarns that generate heat when electricity flows through them and are arranged in one direction, a single weft yarn that constitutes a strip of woven fabric that extends in an orthogonal direction perpendicular to the one direction together with the electric heating warp yarns, and a negative electrode portion and a positive electrode portion connected to the plurality of electric heating warp yarns.

[0014] In the sheet heater described in claim 4, the weft thread constituting the strip, which is a woven fabric extending in a direction perpendicular to the one direction together with the electric heating warp threads, is one. That is, the sheet heater described in claim 4 is manufactured by cutting the strip along the perpendicular direction, without going through a process of changing the width of the strip (sheet heater) to a predetermined width. Therefore, there is little risk of the electric heating warp threads of the sheet heater described in claim 4 breaking.

[0015] The planar heater of the invention described in claim 5 comprises a plurality of the planar heaters described in claim 4, a negative electrode conductor connected to the negative electrode portions of the plurality of the planar heaters, and a positive electrode conductor connected to the positive electrode portions of the plurality of the planar heaters.

[0016] The heating device according to claim 5 can generate more heat than a single planar heater. [Effects of the Invention]

[0017] As described above, the method for manufacturing a planar heater, planar heater, and heating device of the present invention can reduce the risk of breakage of the electric heating warp threads of a planar heater that generates heat when electricity flows through it and has multiple electric heating warp threads arranged in one direction, and weft threads that form a strip-shaped fabric together with the electric heating warp threads. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a schematic side view of a manufacturing apparatus capable of carrying out a method for manufacturing a planar heater according to an embodiment of the present invention, and a strip-shaped body. [Figure 2] FIG. 2 is a schematic plan view of a manufacturing apparatus and a strip. [Figure 3] FIG. 1 is a schematic plan view of a strip (woven fabric). [Figure 4] FIG. 10 is a schematic plan view of a strip cut by a second cutting device. [Figure 5] FIG. 2 is a schematic plan view of a planar heater. [Figure 6] FIG. 6 is a schematic cross-sectional view taken along the arrow line 6-6 in FIG. 5. [Figure 7] FIG. 1 is a schematic plan view of a heating device configured using a plurality of planar heaters. [Figure 8] FIG. 10 is a schematic plan view of a sheet heater according to a first modified example. [Figure 9] FIG. 10 is a schematic plan view of a sheet heater according to a second modified example. [Figure 10] FIG. 10 is a schematic cross-sectional view taken along the arrow line 10-10 in FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, a method for manufacturing a planar heater, a planar heater, and a heating device according to an embodiment of the present invention will be described with reference to Figures 1 to 7. Note that in each figure, an arrow FR indicates the forward direction in the front-to-back direction, an arrow UP indicates the upward direction in the up-down direction, and an arrow LH indicates the leftward direction in the left-to-right direction.

[0020] 1 and 2 is an apparatus capable of carrying out the method for manufacturing a sheet heater according to the embodiment. The manufacturing apparatus 10 includes a driven roller unit 12, a drive roller 14, a drive device 15, a first support table 16, a second support table 18, a conveying device 20, a driven roller 22, an adhesive applying device 24, a pressing device 25, a first cutting device 26, and a second cutting device 28. The drive device 15, the conveying device 20, the adhesive applying device 24, the pressing device 25, the first cutting device 26, the second cutting device 28, a width direction feed device described later, and a conveying robot described later are controlled by a control device (not shown) of the manufacturing apparatus 10.

[0021] 2, the driven roller unit 12 includes five rollers 13 that are aligned in the left-right direction and have the same axis and diameter. The rollers 13 are rotatable in synchronization with one another in the direction of arrow A shown in FIG. 1 around a common rotation axis 12X that extends in the left-right direction.

[0022] The drive roller 14 is provided at a position spaced forward from the driven roller unit 12 and has a rotation axis 14X that is parallel to the rotation axis 12X. The drive roller 14 rotates around the rotation axis 14X in the direction of arrow B shown in FIG. 1 using the driving force generated by the drive device 15.

[0023] A first support base 16 is provided between the driven roller unit 12 and the drive roller 14. An upper surface 17 of the first support base 16 is formed by a plane perpendicular to the vertical direction. Furthermore, a second support base 18 is provided in front of the drive roller 14. An upper surface 19 of the second support base 18 is located one step lower than the upper surface 17 of the first support base 16 and is formed by a plane perpendicular to the vertical direction. A conveying device 20 is provided directly above the second support base 18. The conveying device 20 is formed by multiple pairs of upper and lower drive rollers (not shown) lined up in the front-to-rear direction.

[0024] As shown in FIG. 2, a driven roller 22, an adhesive applicator 24, and a first cutting device 26 are provided on the right side near the rear end of the second support table 18. One end of a flexible, strip-shaped electrode member (electrode) 29 is wrapped around the driven roller 22, which is rotatable about a rotation axis extending in the front-rear direction. The electrode member 29 is made of, for example, copper foil. The other end of the electrode member 29 extends leftward from the driven roller 22 and is placed on the upper surface 19 of the second support table 18. The adhesive applicator 24 applies a conductive adhesive to the upper surface of the electrode member 29. The first cutting device 26 can cut the electrode member 29 in the front-rear direction. Furthermore, a second cutting device 28 is provided directly above the rear end of the second support table 18. The second cutting device 28 can cut the electrode member 29 in the left-right direction. Furthermore, a pressing device 25, which can move up and down, is provided directly above the rear end of the second support table 18.

[0025] A strip 30 extending in a predetermined direction is wound around each roller 13 of the driven roller unit 12 of the manufacturing apparatus 10 configured as described above. The strip 30 includes a flexible strip-shaped backing 32 extending in the predetermined direction and a flexible strip-shaped woven fabric 34 temporarily fixed (temporarily held) to one surface of the backing 32 with an adhesive. As shown in FIG. 2 , the width (left-right dimension) of the backing 32 is greater than the width of the woven fabric 34, and the width of the backing 32 is slightly smaller than the width of the rollers 13. The front portions of each strip 30 extending forward from each roller 13 pass directly above the upper surface 17 of the first support table 16 and are positioned forward of the front end of the first support table 16. Furthermore, the front end of the backing 32 peeled off from the lower surface of the woven fabric 34 is wound around the drive roller 14.

[0026] As shown in FIG. 3, the woven fabric 34 is constructed by weaving together a plurality of heating warp yarns 36 extending in the front-to-rear direction and aligned in the left-to-right direction, and a single weft yarn 38. The weaving method of the heating warp yarns 36 and weft yarn 38 is not particularly limited. Examples of weaving methods include plain weave, twill weave, and satin weave. The woven fabric 34 shown in FIG. 3 is a plain weave. The heating warp yarns 36 contain carbon nanotubes (hereinafter referred to as CNTs). When electricity flows through the heating warp yarns 36, the heating warp yarns 36 generate heat by using the CNTs as a resistor (heating element). Various materials can be used for the weft yarn 38. The material of the weft yarn 38 does not generate substantial heat when supplied with electricity. The woven fabric 34 of this embodiment is manufactured so that its width (left-to-right dimension) is a predetermined width W (see FIG. 3).

[0027] Next, a method for manufacturing the plane heater 45 using the manufacturing apparatus 10 and the strip 30 will be described.

[0028] When the drive device 15 is operated, the drive roller 14 rotates in the direction of arrow B, and the backing paper 32 is wound by the drive roller 14. As a result, each strip 30, one end of which is wound around each roller 13, is transported in the direction of arrow D1 in FIG. 1. The drive roller 14 stops once each strip 30 has been transported forward a predetermined forward transport distance. This process of transporting the strip 30 forward by the drive roller 14 is referred to as the strip transport step (transport step).

[0029] Furthermore, the drive roller 14 winds up the backing paper 32, so that the backing paper 32 is peeled off from the lower surface of the fabric 34. This process of peeling the backing paper 32 off from the lower surface of the fabric 34 by the drive roller 14 is referred to as a separation step.

[0030] Furthermore, the electrode member 29 is moved in the direction of arrow D2 in FIG. 2 by a predetermined widthwise transport distance by a widthwise feed device (not shown). This D2 direction is parallel to the left-right direction in a plan view. When the electrode member 29 moves in the direction D2 by the widthwise transport distance, the leading end (left end) of the electrode member 29 passes to the left between the lower surfaces of the five woven fabrics 34 and the upper surface 19 of the second support table 18 and stops at the position shown in FIG. 2. This process in which the electrode member 29 is transported by the widthwise transport distance by the widthwise feed device is referred to as the electrode transport step.

[0031] Furthermore, when the tip of the electrode member 29 passes below the adhesive applicator 24, the adhesive applicator 24 applies a conductive adhesive (not shown) to the upper surface of the electrode member 29. Therefore, the conductive adhesive is applied to the entire area of ​​the upper surface of the electrode member 29, from the part located directly below the adhesive applicator 24 to the tip of the electrode member 29 (the part located to the left of the leftmost woven fabric 34). This process of applying adhesive to the electrode member 29 by the adhesive applicator 24 is referred to as the adhesive application step (electrode connection step).

[0032] Furthermore, the pressing device 25 (see the imaginary lines in FIG. 1 ) disposed above the second support stand 18 moves downward from the initial position shown by the imaginary lines in FIG. 1 , moving the five woven fabrics 34 downward and pressing them against the upper surfaces of the electrode members 29 positioned directly below the woven fabrics 34. As a result, the electrode members 29 are fixed to the five woven fabrics 34 by the adhesive applied to the upper surfaces of the electrode members 29. In other words, the electrode members 29 and the five woven fabrics 34 are integrated. The pressing device 25 returns to its initial position after a predetermined time has elapsed. This process in which the pressing device 25 fixes the electrode members 29 to the five woven fabrics 34 so that they are connected to each electric heating warp thread 36 via the conductive adhesive is referred to as the integration step (electrode connection step).

[0033] Next, the first cutting device 26 cuts the electrode member 29 in the front-to-rear direction at a portion located to the right of the rightmost woven fabric 34. This results in an electrode configuration 29A that is cut out from the electrode member 29 and fixed to five woven fabrics 34. The left end of the electrode configuration 29A is located to the left of the leftmost woven fabric 34, and the right end of the electrode configuration 29A is located to the right of the rightmost woven fabric 34. This process of cutting the electrode member 29 by the first cutting device 26 is referred to as a first cutting step.

[0034] Next, the second cutting device 28, which was located in its initial position (the position indicated by the solid line in FIG. 1 ) directly above the rightmost woven fabric 34, moves downward and cuts the right end of the electrode configuration 29A and the right half of the rightmost woven fabric 34 along a cutting line CL (see FIG. 2 ), which is a straight line passing through the center of the width of the electrode configuration 29A in the left-right direction. The second cutting device 28 then moves linearly to the left along the cutting line CL while maintaining its height. This causes the entire electrode configuration 29A and the five woven fabrics 34 to be cut along the cutting line CL. That is, as shown in FIG. 4 , the electrode configuration 29A is divided into a positive electrode portion (electrode) 29A1 in front of the cutting line CL and a negative electrode portion (electrode) 29A2 behind the cutting line CL. The second cutting device 28 then returns to its initial position. This process of cutting the electrode member 29 and the woven fabric 34 by the second cutting device 28 is referred to as the second cutting step (cutting step).

[0035] After the second cutting device 28 returns to its initial position, the conveying device 20 is activated, and the five pieces of fabric 34 that are sandwiched from above and below by the upper and lower drive rollers of the conveying device 20 and are positioned forward of the cutting line CL are moved to a discharge position forward of the second support table 18. This process of moving the five pieces of fabric 34 positioned forward of the cutting line CL to the discharge position by the conveying device 20 is referred to as a discharge step.

[0036] Thereafter, when the drive roller 14 performs the strip transport step and the separation step, the strip 30 is transported a forward transport distance, and the backing sheet 32 ​​is peeled off from the underside of the fabric 34. As a result, the negative electrode part 29A2, which was located directly below the second cutting device 28, moves to the front end position PF shown in FIG.

[0037] After this, the electrode transport step, adhesive application step, integration step, first cutting step, and second cutting step are performed, and a planar heater 45 is completed, which is located in front of the second cutting device 28 and includes five fabrics 34, a negative electrode portion 29A2 fixed to the front ends of the five fabrics 34, and a positive electrode portion 29A1 fixed to the rear ends of the five fabrics 34 (see Figures 2 and 5).

[0038] After this, the discharge step, the strip transport step, the separation step, the electrode transport step, the adhesive application step, the integration step, the first cutting step, and the second cutting step are repeatedly performed to manufacture multiple planar heaters 45 and transport them to the discharge position.

[0039] The plurality of planar heaters 45 manufactured in this manner are components of a heating device 50, as shown in Fig. 7. The heating device 50 includes one strip-shaped positive electrode conductor 51 that is conductive, flexible, and extends linearly, one strip-shaped negative electrode conductor 52 that is conductive, flexible, and extends linearly, three planar heaters 45, each of which has a surface of the positive electrode portion 29A1 opposite to the woven fabric 34 fixed to one surface of the positive electrode conductor 51 via a conductive adhesive and a surface of the negative electrode portion 29A2 opposite to the woven fabric 34 fixed to one surface of the negative electrode conductor 52 via a conductive adhesive, and an insulating cover material (not shown) that covers the entire surfaces of the positive electrode conductor 51, the negative electrode conductor 52, and the planar heaters 45.

[0040] The heating device 50 is provided, for example, inside a seat cushion of a vehicle seat, and the positive conductor 51 and the negative conductor 52 are connected to a power source via a control device. When power from the power source is supplied to the positive conductor 51 and the negative conductor 52, current flows through the positive electrode portion 29A1 of each planar heater 45 and the electric heating warp yarns 36 of the fabric 34 to each negative electrode portion 29A2, and then from each negative electrode portion 29A2 to the negative conductor 52. When current flows through each electric heating warp yarn 36, the electric heating warp yarns 36 generate heat.

[0041] (Action and effect) Next, the operation and effects of this embodiment will be described.

[0042] In the method for manufacturing the planar heater 45 of this embodiment, a strip 30 extending in the front-rear direction (the perpendicular direction) is transported in the front-rear direction by the manufacturing apparatus 10. The strip 30 includes a plurality of heating warps 36 that contain CNTs, generate heat when electricity flows through them, and are aligned in the left-right direction (one direction), and a single weft 38 that, together with the heating warps 36, forms a woven fabric 34. Furthermore, electrode members 29 (positive electrode portion 29A1, negative electrode portion 29A2) are connected to the strip 30 so as to contact the plurality of heating warps 36. That is, the method for manufacturing the planar heater 45 of this embodiment does not include a step of changing the width (left-right dimension) of the strip (planar heater 45) to a predetermined width W by cutting the strip along the front-rear direction (the extension direction of the strip 30). That is, the planar heater 45 is manufactured without a step of changing the width of the strip to a predetermined width W. Therefore, this manufacturing method reduces the risk of breakage of the heating warps 36 of the planar heater 45.

[0043] ) Furthermore, in the method for manufacturing the sheet heater 45 of this embodiment, the sheet 30 transported forward in the sheet transport step (transport step) is provided with a backing 32 that extends in the front-to-rear direction and temporarily holds (temporarily fixes) the heated warp threads 36 and the weft threads 38 on one side, and further includes a separation step in which the backing 32 is separated from the heated warp threads 36 and the weft threads 38. This makes it easy to manufacture the sheet heater 45 while maintaining the positional relationship of the heated warp threads 36 on the sheet 30.

[0044] Furthermore, the method for manufacturing the sheet heater 45 of this embodiment includes a second cutting step (cutting step) in which the strip 30 and the electrode configuration 29A are cut along a cutting line CL that is a straight line passing through the center of the width of the electrode configuration 29A in the left-right direction (the extension direction of the electrode configuration 29A). Therefore, two electrode portions (positive electrode portion 29A1 and negative electrode portion 29A2) can be manufactured by a single cutting process using the second cutting device 28.

[0045] 5, the left ends of the positive electrode portion 29A1 and the negative electrode portion 29A2 of the sheet heater 45 protrude leftward from the leftmost woven fabric 34, and the right ends of the positive electrode portion 29A1 and the negative electrode portion 29A2 protrude rightward from the rightmost woven fabric 34. Therefore, while the left and right ends of the positive electrode portion 29A1 and the negative electrode portion 29A2 of the sheet heater 45 are gripped by a gripping device (not shown) of a transport robot, the positive electrode portion 29A1 can be fixed to the positive electrode conductor 51 via an adhesive, and the negative electrode portion 29A2 can be fixed to the negative electrode conductor 52 via an adhesive. In other words, the sheet heater 45 can be bonded to the positive electrode conductor 51 and the negative electrode conductor 52 without damaging the positive electrode portion 29A1 and the negative electrode portion 29A2 with the gripping device.

[0046] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

[0047] For example, a sheet heater 45A may be manufactured as in a first modified example shown in Fig. 8. The left ends of the positive electrode portion 29A1 and the negative electrode portion 29A2 of this sheet heater 45A are positioned so that they coincide with the left edge of the leftmost fabric 34, and the right ends of the positive electrode portion 29A1 and the negative electrode portion 29A2 are positioned so that they coincide with the right edge of the rightmost fabric 34. In the first modified example, in the electrode conveying step, the electrode member 29 is conveyed to the left so that the leading end (left end) of the electrode member 29 is positioned directly below the left edge of the leftmost fabric 34. In the first cutting step, the electrode member 29 is cut by the first cutting device 26 so that the right end of the electrode configuration portion 29A coincides with the right edge of the rightmost fabric 34. According to this first modification, the length (size) of the positive electrode portion 29A1 and the negative electrode portion 29A2 in each planar heater 45A is smaller than that of the planar heater 45, so that each planar heater 45A can be manufactured at low manufacturing cost.

[0048] 9 and 10, a sheet heater 45B may be manufactured. In this sheet heater 45B, a positive electrode portion 29A1 and a negative electrode portion 29A2 are fixed to the upper and lower surfaces of each fabric 34 via a conductive adhesive. Furthermore, the opposing surfaces of the upper and lower positive electrode portions 29A1 and the opposing surfaces of the upper and lower negative electrode portions 29A2 are fixed to each other via a conductive adhesive. In the second modification, in the electrode transport step, the electrode members 29 located below each fabric 34 and the electrode members 29 located above each fabric 34 are transported in the direction D2 by the width direction feed device. Furthermore, in the adhesive application step, the adhesive applicator 24 applies conductive adhesive to the upper surface of the lower electrode member 29 and the lower surface of the upper electrode member 29. Furthermore, in the integration step (electrode connection step), the pressing device 25 moves downward from the initial position, pressing the upper electrode member 29 against the upper surfaces of the five woven fabrics 34 and pressing the lower surfaces of the five woven fabrics 34 against the lower electrode member 29.

[0049] The number of fabrics 34 in the sheet heaters 45, 45A, and 45B of the embodiment and each of the modifications may be any number.

[0050] The number of planar heaters 45, 45A, 45B included in the heating device 50 may be any number as long as it is plural.

[0051] The band 30 in the embodiment and each modification does not have to include the backing sheet 32 ​​.

[0052] The left end positions of the positive electrode portion 29A1 and the negative electrode portion 29A2 of the planar heater 45B of the second modified example may be aligned with the left edge of the fabric 34 located at the leftmost position, and the right end positions of the positive electrode portion 29A1 and the negative electrode portion 29A2 may be aligned with the right edge of the fabric 34 located at the rightmost position.

[0053] The adhesive applicator 24 may apply the conductive adhesive only to the portions of the electrode member 29 that are connected to the respective fabrics 34 .

[0054] Furthermore, in the embodiment and each modified example, the electrode transport step may be a step of transporting the electrode member 29 to the right immediately above each woven fabric 34, the adhesive application step may be a step of applying a conductive adhesive to the underside of the electrode member 29, the integration step may be a step of moving each woven fabric 34 upward and pressing it against the underside of the electrode member 29 located immediately above the woven fabric 34, the second cutting step may be a step of cutting the electrode member 29, the woven fabric 34, and the backing paper 32, and further, a separation step may be performed after the second cutting step of peeling the backing paper 32 from the upper surface of the woven fabric 34. According to this modified example, the backing paper 32 remains integrated with the woven fabric 34 until the second cutting step is completed, so the second cutting step can be performed while maintaining the positional relationship between the woven fabric 34 and the electrode member 29.

[0055] In the embodiment and each modified example, a plurality of fabrics 34 may be temporarily fixed to a single mount having a large left-right dimension (width). [Explanation of symbols]

[0056] 29 Electrode material (electrode) 29A1 Positive electrode part (electrode) 29A2 Negative electrode part (electrode) 30 fascicles 32 Mount 34 Textiles 36 Electric Warp 38 Weft 45 45A 45B Planar heater 50 Heating device 51 Positive conductor 52 negative electrode conductor CL cutting line

Claims

1. a conveying step of conveying a strip-shaped body in an orthogonal direction, the strip-shaped body having a plurality of electrically heated warp yarns that generate heat when electricity flows therethrough and that are arranged in one direction, and one weft yarn that constitutes a woven fabric together with the electrically heated warp yarns, and the strip-shaped body extending in an orthogonal direction that is orthogonal to the one direction; an electrode connecting step of connecting electrodes to the belt-shaped body so as to contact the plurality of electrically heated warp yarns; A method for manufacturing a planar heater having the above structure.

2. the belt-shaped body conveyed in the conveying step includes a backing sheet extending in the orthogonal direction and temporarily holding the electrically heated warp yarns and the weft yarns by one surface thereof; The method for manufacturing a sheet heater according to claim 1 , further comprising a separating step of separating the mount from the electric heating warp yarns and the weft yarns.

3. the electrodes are strip-shaped and extend in the one direction, 3. The method for manufacturing a planar heater according to claim 1, further comprising a cutting step of cutting the strip and the electrodes along a cutting line that is a straight line passing through a central portion of the electrode in a width direction in the one direction.

4. a plurality of electrically heated warp yarns that generate heat when electricity flows therethrough and are arranged in one direction; One weft yarn constituting a belt-shaped woven fabric extending in an orthogonal direction perpendicular to one direction together with the heating warp yarn; a negative electrode portion and a positive electrode portion connected to a plurality of the electrically heated warp yarns; A plane heater comprising:

5. A plurality of the planar heaters according to claim 4; a negative electrode conductor connected to the negative electrode portions of the plurality of planar heaters; a positive electrode conductor connected to the positive electrode portions of the plurality of planar heaters; A heating device comprising:

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