Industrial belts

Abstract

To provide an industrial belt with sufficient communication performance and an RFID tag attached to which is difficult to break.SOLUTION: An industrial belt 100 is used as a transmission belt to transmit power by being wound around a rotating body or as a conveyance belt to convey articles. The industrial belt 100 comprises a contactless data reception / transmission body 10 and a flexible belt body 110 on which the contactless data reception / transmission body 10 is installed. The contactless data reception / transmission body 10 comprises a plate-like base material 11, an IC chip mounted on the base material 11, and an antenna 12 with a pair of radiation elements 17, 18 at least a part of which extends to the outside of the base material 11. The base material 11 is arranged the longitudinal direction of which is transverse to the longitudinal direction of the belt body 110. At least a part of the radiation elements 17, 18 is that an average extending direction is transverse to the lateral direction of the belt body 110.SELECTED DRAWING: Figure 4

Description

【Technical Field】 【0001】 The present invention relates to an industrial belt. 【Background Art】 【0002】 In recent years, RFID (Radio Frequency Identification) tags have been used for purposes such as distribution management. RFID tags can perform short-range wireless communication with a reader / writer. An industrial belt, for example, is wound around a pulley and runs along with the rotational drive of the pulley. Patent Document 1 discloses an industrial belt provided with an RFID tag. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2020-118297 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In the above-described industrial belt, it is required that the RFID tag has sufficient communication performance. When the industrial belt is wound around a pulley and runs, the RFID tag may be damaged. 【0005】 One aspect of the present invention is to provide an industrial belt that has sufficient communication performance and is difficult for the RFID tag to be damaged. 【Means for Solving the Problems】 【0006】 One aspect of the present invention provides an industrial belt used as a power transmission belt wrapped around a rotating body to transmit power, or as a conveyor belt for transporting articles, comprising: a non-contact data transmitter / receiver; and a flexible belt body on which the non-contact data transmitter / receiver is installed, wherein the non-contact data transmitter / receiver comprises: a plate-shaped base material; an IC chip provided on the base material; a circuit provided on the base material and electrically connected to the IC chip; and an antenna electrically connected to the circuit and having a pair of radiating elements, at least a portion of which extends outside the base material, wherein the base material is arranged such that its longitudinal direction intersects the longitudinal direction of the belt body, and at least a portion of the radiating elements has an average extension direction that intersects the short direction of the belt body. 【0007】 Preferably, the radiating element is electrically connected to the circuit via a metal junction at the connection point. 【0008】 The radiating element may include a first extension portion extending in the longitudinal direction of the base material outward from the connection point, and a second extension portion starting from the tip of the first extension portion, with the longitudinal direction of the belt body as the average extension direction. 【0009】 Preferably, the radiating element extends from the connection point in the longitudinal direction of the belt body. 【0010】 The aforementioned industrial belt may be a power transmission belt that is wrapped around a rotating body to transmit power. 【0011】 The aforementioned non-contact data transmitter / receiver may include a temperature sensor. [Effects of the Invention] 【0012】 According to one aspect of the present invention, it is possible to provide an industrial belt that has sufficient communication performance and in which RFID tags are less likely to be damaged. [Brief explanation of the drawing] 【0013】 [Figure 1]It is a configuration diagram of a transmission device using an industrial belt according to the first embodiment. [Figure 2] It is a schematic perspective view of an industrial belt according to the first embodiment. [Figure 3] It is a perspective view of a partial cross-sectional state of an industrial belt according to the first embodiment. [Figure 4] It is a plan view showing the internal structure of an industrial belt according to the first embodiment. [Figure 5] It is a plan view of an RFID tag. [Figure 6] It is a plan view of the base material of an RFID tag. [Figure 7] It is a perspective view of the first radiation element of an RFID tag. [Figure 8] It is a perspective view of the second radiation element of an RFID tag. [Figure 9] It is a plan view showing the internal structure of an industrial belt according to the second embodiment. [Figure 10] It is a plan view of an RFID tag of an industrial belt according to the third embodiment. [Figure 11] It is a plan view of a modified example of an antenna. [Figure 12] It is a plan view showing the internal structure of an industrial belt of a comparative example. [Figure 13] It is a diagram showing the theoretical communication distances of examples and comparative examples. 【Embodiments for Carrying Out the Invention】 【0014】 Hereinafter, an industrial belt according to an embodiment of the present invention will be described in detail with reference to the drawings. The embodiments described below are specifically described to better understand the gist of the present invention and do not limit the present invention. In the drawings referred to below, for ease of understanding, the dimensions of each member are appropriately changed and illustrated as necessary. 【0015】 [Industrial Belt] (First Embodiment) FIG. 1 is a configuration diagram of a transmission device 500 using an industrial belt 100 according to the first embodiment. FIG. 2 is a schematic perspective view of the industrial belt 100. FIG. 3 is a perspective view of a partial cross-sectional state of the industrial belt 100. FIG. 4 is a plan view showing the internal structure of the industrial belt 100. In FIG. 4, the outer layer 113 (see FIG. 3) is not shown. The industrial belt 100 of this embodiment is an example of a transmission belt. 【0016】 As shown in FIG. 1, the transmission device 500 includes an industrial belt 100 according to the first embodiment, a driving pulley 101, a driven pulley 102, and a tension pulley 103. The driving pulley 101, the driven pulley 102, and the tension pulley 103 are examples of "rotating bodies". A plurality of meshing grooves may be provided on the peripheries of the driving pulley 101 and the driven pulley 102. The tension pulley 103 applies tension to the industrial belt 100 by pressing the industrial belt 100. 【0017】 The industrial belt 100 is wound around the driving pulley 101 and the driven pulley 102. The industrial belt 100 transmits the driving force (power) of the driving pulley 101 to the driven pulley 102. The transmission device 500 is used, for example, in machine tools, printing machines, injection molding machines, etc. As shown in FIG. 2, the industrial belt 100 is formed in an endless shape. 【0018】 As shown in FIGS. 3 and 4, the industrial belt 100 includes a belt body 110 and an RFID tag (non-contact data transmitter / receiver) 10. As shown in FIG. 3, the belt body 110 includes an inner layer 111, an intermediate layer 112, an outer layer 113, and a core wire 114. The inner layer 111, intermediate layer 112, and outer layer 113 are formed from synthetic resin, rubber, etc. Examples of constituent materials for the inner layer 111, intermediate layer 112, and outer layer 113 include ethylene-α-olefin elastomers such as ethylene-propylene-diene polymer (EPDM) and ethylene-propylene copolymer (EPM); chloroprene rubber (CR); chlorosulfonated polyethylene rubber (CSM); hydrogenated acrylonitrile rubber (H-NBR); polyurethane, etc. 【0019】 Multiple teeth 115 are formed on the inner surface of the inner layer 111. The multiple teeth 115 are formed at equal intervals along the length of the industrial belt 100. The teeth 115 mesh with the meshing grooves of the drive pulley 101 and the driven pulley 102 (see Figure 1). 【0020】 The core wire 114 is composed of twisted yarns such as polyester fibers, polyethylene naphthalate fibers, aramid fibers, and vinylon fibers. The core wire 114 is embedded in the intermediate layer 112. The core wire 114 is provided, for example, along the length of the belt body 110. 【0021】 The industrial belt 100 is flexible. The industrial belt 100 can be elastically bent and deformed, for example. 【0022】 Figure 5 is a plan view of the RFID tag 10. Figure 6 is a plan view of the substrate 11 of the RFID tag 10. Figure 7 is a perspective view of the first radiating element 17 of the RFID tag 10. Figure 8 is a perspective view of the second radiating element 18 of the RFID tag 10. 【0023】 As shown in Figures 5 and 6, the RFID tag 10 comprises a base material 11, an antenna 12, an IC chip 13, and a matching circuit 16 (see Figure 6). The base material 11 is formed in the shape of a rectangular plate. The base material 11 is rectangular in shape when viewed from above. One side of the base material 11 is called the first main surface 11a. 【0024】 In the following explanation, the XYZ Cartesian coordinate system may be used. As shown in Figure 5, the X direction is the short-side direction of the first principal surface 11a. The Y direction is the long-side direction of the first principal surface 11a. The Y direction is perpendicular to the X direction within the plane along the first principal surface 11a. The Z direction is perpendicular to both the X and Y directions. The Z direction is the thickness direction of the substrate 11. Viewing from the Z direction is called a plan view. The plane along the X and Y directions is called the XY plane. The substrate 11 has a shape in which the dimension in the Y direction (second direction) is larger than the dimension in the X direction (first direction). 【0025】 In Figure 5, the right side is one direction in the X direction (+X direction). In Figure 5, the left side is the opposite direction to the +X direction (-X direction). In Figure 5, the top side is one direction in the Y direction (+Y direction). In Figure 5, the bottom side is the opposite direction to the +Y direction (-Y direction). In Figure 5, the front of the page is one direction in the Z direction (+Z direction). In Figure 5, the back of the page is the opposite direction to the +Z direction (-Z direction). 【0026】 As the base material 11, resin base materials, paper base materials, ceramic base materials, etc., can be used. Examples of resin base materials include base materials made of polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN); base materials made of polyolefin resins such as polyethylene (PE) and polypropylene (PP); base materials made of polyfluoroethylene resins such as polyvinyl fluoride, polyvinylidene fluoride, and polytetrafluoroethylene; base materials made of polyamide resins such as nylon 6 and nylon 6,6; base materials made of vinyl polymers such as polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer, polyvinyl alcohol, and vinylon; base materials made of acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, and polybutyl acrylate; base materials made of polystyrene; base materials made of polycarbonate (PC); base materials made of polyarylate; and base materials made of polyimide. 【0027】 The base material 11 may be formed from a fiber-reinforced resin. For example, a base material made by impregnating a glass fiber cloth with epoxy resin and then heat-curing it can be used. The flexural modulus of the base material 11 (according to JIS K7171 or JIS R1602; for example, a 3-point or 4-point bending test) may be, for example, 1 GPa or more (preferably 10 GPa or more). 【0028】 As shown in Figure 6, the IC chip 13 is provided on the first main surface 11a of the substrate 11. The IC chip 13 is located approximately in the center of the longitudinal direction of the first main surface 11a. The IC chip 13 is not particularly limited, and only needs to be capable of writing and reading information non-contactually via the antenna 12 and the matching circuit 16. 【0029】 The IC chip 13 may include a temperature sensor 15. The temperature sensor 15 can measure the temperature of the belt body 110. The IC chip 13 may also include a storage unit for storing data from the temperature sensor 15. 【0030】 The matching circuit 16 has a loop-shaped closed circuit 20. The closed circuit 20 includes a first wiring 21 and a second wiring 22. The impedance of the matching circuit 16 can be adjusted by the pattern shape. The matching circuit 16 is an example of a "circuit". 【0031】 The first wiring 21 includes a first path 23 and a second path 24. One end 23a of the first path 23 is electrically connected to the IC chip 13. The other end 23b of the first path 23 is electrically connected to the first connection point 25. One end 24a of the second path 24 is electrically connected to the IC chip 13. The other end 24b of the second path 24 is electrically connected to the second connection point 26. 【0032】 The first connection point 25 is located away from the IC chip 13 in the +Y direction. The second connection point 26 is located away from the IC chip 13 in the -Y direction. The first connection point 25 electrically connects the other end 23b of the first path 23 to one end 22a of the second wiring 22. The second connection point 26 electrically connects the other end 24b of the second path 24 to the other end 22b of the second wiring 22. The second wiring 22 is formed from one of the connection points 25 and 26 (first connection point 25) to the other (second connection point 26). 【0033】 The matching circuit 16 can be formed on the first main surface 11a of the substrate 11 by metal plating. The matching circuit 16 may also be formed from conductive foil. The matching circuit 16 may also be formed using a polymer-type conductive ink by a printing method such as screen printing or inkjet printing. 【0034】 Examples of conductive foils forming the matching circuit 16 include copper foil, silver foil, gold foil, platinum foil, and aluminum foil. Examples of metal plating forming the matching circuit 16 include copper plating, silver plating, gold plating, and platinum plating. 【0035】 As shown in Figure 5, the antenna 12 comprises a first radiating element 17 and a second radiating element 18. The first radiating element 17 and the second radiating element 18 are sometimes referred to as "radiating elements 17, 18". The first radiating element 17 and the second radiating element 18 are an example of a "pair of radiating elements". 【0036】 The radiating elements 17 and 18 are formed from linear bodies. The radiating elements 17 and 18 are formed from metals such as steel, stainless steel, copper, and copper alloys. Preferably, the radiating elements 17 and 18 are formed from hard steel wire, copper alloy wire, etc. The linear bodies constituting the radiating elements 17 and 18 may be insulated wires such as enameled wires. If insulated wires are used as linear bodies, current flow between the linear bodies can be suppressed in the winding section 33. 【0037】 As shown in Figure 6, the first radiating element 17 can be electrically connected to and fixed to the first connection point 25 by soldering, eyelet fastening, crimping, ultrasonic bonding, etc. At the first connection point 25, the first radiating element 17 is electrically connected to the matching circuit 16 via a metal joint 27 (solder joint, etc.). 【0038】 The second radiating element 18 can be electrically connected to and fixed to the second connection point 26 by soldering, eyelet fastening, crimping, ultrasonic bonding, etc. At the second connection point 26, the second radiating element 18 is electrically connected to the matching circuit 16 via a metal joint 28 (solder joint, etc.). The first connection point 25 and the second connection point 26 are examples of "connection points". 【0039】 As shown in Figure 5, the first radiating element 17 comprises a first extension portion 41 and a second extension portion 42. The first extension portion 41 extends from the first connection point 25 to the outside of the base material 11 in a plan view. More specifically, the first extension portion 41 extends from the first connection point 25 in the longitudinal direction (+Y direction) of the base material 11 and reaches the outside of the base material 11 (the +Y direction side of the base material 11) in a plan view (see Figure 6). The first extension portion 41 intersects with the outer edge of the short side of the base material 11 in a plan view. The first extension portion 41 extends in the short direction of the belt body 110 (see Figure 4). 【0040】 Because the first extension portion 41 is formed in this manner, even if a bending force is applied to the RFID tag 10 when the industrial belt 100 is driven, the bending force is less likely to act on the contact point between the first extension portion 41 and the base material 11 (the intersection point between the first extension portion 41 and the outer edge of the base material 11 in a plan view). Therefore, the radiating element 17 is less likely to be damaged. 【0041】 The second extension portion 42 comprises a base extension portion 30, a plurality of main extension portions 31, and a plurality of folded portions 32. The second extension portion 42 is located outside the base material 11 in a plan view. 【0042】 The base extension portion 30 extends in the +X direction, starting from the tip of the first extension portion 41 in the extension direction (the end in the +Y direction). The main extension portion 31 is linear in shape along the Y direction. The extension direction (Y direction) of the main extension portion 31 intersects the X direction. Multiple main extension portions 31 are approximately parallel to each other. Multiple main extension portions 31 are spaced apart in the X direction (main direction) and arranged in a line in the X direction. 【0043】 The multiple main extensions 31 are arranged in order from the main extension 31 closest to the first connection point 25 (in the +X direction), and are referred to as the first main extension 31, the second main extension 31, and so on. The first main extension 31, which is closest to the first connection point 25, extends in the +Y direction from the tip of the base extension 30. 【0044】 The multiple folded sections 32 are arranged in order from the folded section 32 closest to the first connection point 25 (in the +X direction), and are referred to as the first folded section 32, the second folded section 32, and so on. The folded sections 32 alternately connect one end to one side and the other end to the other side of adjacent main extension sections 31. Specifically, the nth folded section 32 connects one end (the +Y direction end) of the nth main extension section 31 to one end (the +Y direction end) of the (n+1)th main extension section 31 (where n is an odd number greater than or equal to 1). The (n+1)th folded section 32 connects the other end (the -Y direction end) of the (n+1)th main extension section 31 to the other end (the -Y direction end) of the (n+2)th main extension section 31. 【0045】 Thus, the multiple folded portions 32 alternately connect one end to one and the other end to the adjacent main extension portions 31, so that the first radiating element 17 as a whole has a meandering shape. 【0046】 The second extension portion 42 has multiple repeating units 43, each consisting of two adjacent main extension portions 31 and two adjacent folded portions 32. The multiple repeating units 43 are aligned in the +X direction starting from the tip of the base extension portion 30. The average extension direction of the second extension portion 42 is the +X direction, which is the direction in which the repeating units 43 are aligned. 【0047】 As shown in Figure 7, the folded portion 32 has a wound portion 33. The wound portion 33 is circular in shape in plan view. The wound portion 33 is helical in shape, revolving around an axis (not shown) along the Z direction while progressing in the Z direction. For example, the winding portion 33 of the first folded portion 32 (first winding portion 33) is a spiral shape with 1.5 turns, starting from one end (the +Y direction end) of the first main extension portion 31 and ending at one end (the +Y direction end) of the second main extension portion 31. The winding portion 33 of the nth folded portion 32 (n is an odd number greater than or equal to 1) has the same structure as the first winding portion 33. 【0048】 The winding portion 33 of the second folded portion 32 (second winding portion 33) is a spiral shape with 1.5 turns, starting from the other end (-Y direction end) of the second main extension portion 31 and ending at the other end (-Y direction end) of the third main extension portion 31. The winding portion 33 of the (n+1) folded portion 32 (n is an odd number greater than or equal to 1) has the same structure as the second winding portion 33. 【0049】 As shown in Figure 5, the second radiating element 18 comprises a first extension portion 141 and a second extension portion 142. The first extension portion 141 extends from the second connection point 26 to the outside of the base material 11 in a plan view. More specifically, the first extension portion 141 extends from the second connection point 26 in the longitudinal direction (-Y direction) of the base material 11 and reaches the outside of the base material 11 (the -Y direction side of the base material 11) in a plan view (see Figure 6). The first extension portion 141 extends in the short direction of the belt body 110 (see Figure 4). 【0050】 The second extension portion 142 comprises a base extension portion 130, a plurality of main extension portions 131, and a plurality of folded portions 132. The second extension portion 142 is located outside the base material 11 in a plan view. 【0051】 The base extension portion 130 extends in the -X direction, starting from the tip of the first extension portion 141 in the extension direction (the end in the -Y direction). The main extension portion 131 is in a straight line along the Y direction. The extension direction (Y direction) of the main extension portion 131 intersects the X direction. Multiple main extension portions 131 are approximately parallel to each other. Multiple main extension portions 131 are arranged in the X direction (main direction) with spacing between them. 【0052】 The multiple main extensions 131 are arranged in order from the main extension 131 closest to the second connection point 26 (in the -X direction), and are referred to as the first main extension 131, the second main extension 131, and so on. The first main extension 131 closest to the second connection point 26 extends in the -Y direction from the tip of the base extension 130. 【0053】 The multiple folded sections 132 are arranged in order from the folded section 132 closest to the second connection point 26 (in the -X direction), and are referred to as the first folded section 132, the second folded section 132, and so on. The folded sections 132 alternately connect one end to one side and the other end to the other side of adjacent main extension sections 131. Specifically, the m-th folded section 132 connects one end (-Y direction end) of the m-th main extension section 131 to one end (-Y direction end) of the m+1-th main extension section 131 (where m is an odd number greater than or equal to 1). The m+1-th folded section 132 connects the other end (+Y direction end) of the m+1-th main extension section 131 to the other end (+Y direction end) of the m+2-th main extension section 131. 【0054】 Thus, the multiple folded portions 132 alternately connect one end to the adjacent main extension portion 131 and the other end to the adjacent main extension portion 131, so the second radiating element 18 as a whole has a meandering shape. 【0055】 The second extension portion 142 has a plurality of repeating units 143, each consisting of two adjacent main extension portions 131 and two adjacent folded portions 132. The plurality of repeating units 143 are aligned in the -X direction starting from the tip of the base extension portion 130. The average extension direction of the second extension portion 142 is the -X direction, which is the direction in which the repeating units 143 are aligned. 【0056】 As shown in Figure 8, the folded portion 132 has a wound portion 133. The wound portion 133 is circular in shape in plan view. The wound portion 133 is helical in shape, revolving around an axis (not shown) along the Z direction while progressing in the Z direction. For example, the winding portion 133 of the first folded portion 132 (first winding portion 133) is a spiral shape with 1.5 turns, starting from one end (the end in the -Y direction) of the first main extension portion 131 and ending at one end (the end in the -Y direction) of the second main extension portion 131. The winding portion 133 of the m-th folded portion 132 (where m is an odd number greater than or equal to 1) has the same structure as the first winding portion 133. 【0057】 The winding portion 133 of the second folded portion 132 (second winding portion 133) is a spiral shape with 1.5 turns, starting from the other end (+Y direction end) of the second main extension portion 131 and ending at the other end (+Y direction end) of the third main extension portion 131. The winding portion 133 of the m+1 folded portion 132 (m is an odd number greater than or equal to 1) has the same structure as the second winding portion 133. 【0058】 The wound sections 33 and 133 are helical and therefore possess elasticity as torsion springs. As a result, the radiating elements 17 and 18 can be elastically deformed so that the angle between adjacent main extending sections increases or decreases. Consequently, the wound sections 33 and 133 can absorb stress when an external force (e.g., tensile or compressive force) acts on the radiating elements 17 and 18. This reduces the stress acting on the base portions (connection points 25 and 26) of the radiating elements 17 and 18, thereby suppressing damage to the connection points 25 and 26. 【0059】 The first radiating element 17 and the second radiating element 18 are, for example, rotationally symmetrical with respect to the Z-axis passing through the center of the substrate 11. The radiating elements 17 and 18 can be manufactured by forming a linear body. 【0060】 As shown in Figure 3, the RFID tag 10 is installed on the belt body 110. The RFID tag 10 is, for example, placed between the intermediate layer 112 and the outer layer 113. The base material 11 is oriented along the belt body 110. The thickness direction of the base material 11 is aligned with the thickness direction of the belt body 110 (the thickness direction of the intermediate layer 112 and the outer layer 113). The location where the RFID tag 10 is installed is not limited to between the intermediate layer 112 and the outer layer 113. The RFID tag 10 may be installed between the inner layer 111 and the intermediate layer 112. The RFID tag 10 may be installed on the outer surface of the outer layer 113 or on the inner surface of the inner layer 111. 【0061】 The installation configuration of the RFID tag 10 will be explained with reference to Figure 4. As shown in Figure 4, the RFID tag 10 is positioned such that the longitudinal direction of the base material 11 intersects the longitudinal direction of the belt body 110. Preferably, the longitudinal direction of the base material 11 is aligned with the short direction of the belt body 110. The longitudinal direction of the base material 11 is preferably perpendicular to the longitudinal direction of the belt body 110, but it may also be inclined with respect to the longitudinal direction of the belt body 110. The inclination angle of the longitudinal direction of the base material 11 with respect to the longitudinal direction of the belt body 110 is preferably greater than 45 degrees (for example, 60 degrees or more). 【0062】 The RFID tag 10 is arranged such that the average extension direction of the radiating elements 17 and 18 intersects the short direction of the belt body 110. Preferably, the average extension direction of the radiating elements 17 and 18 is along the longitudinal direction of the belt body 110. The average extension direction of the radiating elements 17 and 18 is preferably perpendicular to the short direction of the belt body 110, but it may also be inclined with respect to the short direction of the belt body 110. The inclination angle of the average extension direction of the radiating elements 17 and 18 with respect to the short direction of the belt body 110 is preferably greater than 45 degrees (for example, 60 degrees or more). 【0063】 As shown in Figure 1, when the drive pulley 101 of the transmission device 500 is driven, the industrial belt 100 travels between the drive pulley 101 and the driven pulley 102. The industrial belt 100 transmits the driving force (power) of the drive pulley 101 to the driven pulley 102. The industrial belt 100 is a transmission belt that is wrapped around the pulleys 101 and 102 to transmit power. 【0064】 [Effects of the industrial belt of the first embodiment] As the industrial belt 100 travels along the pulleys 101 and 102, it takes on a curved shape that follows the periphery of the pulleys 101 and 102, which can cause bending forces to be applied to the RFID tags 10. As shown in Figure 4, the base material 11 of the RFID tag 10 is positioned so that its longitudinal direction aligns with the short direction of the belt body 110, so the dimensions of the base material 11 in the belt length direction are small. Therefore, the force applied to the base material 11 due to the bending of the industrial belt 100 can be suppressed. The base material 11 usually has lower bending resistance than the radiating elements 17 and 18, but in the case of the industrial belt 100, the bending force applied to the base material 11 is small, so damage to the base material 11 is unlikely to occur. In contrast, if the longitudinal direction of the base material aligns with the longitudinal direction of the belt body, a large bending force may be applied to the base material due to the bending of the industrial belt. 【0065】 The RFID tag 10 is arranged such that the average extension direction of the radiating elements 17 and 18 aligns with the longitudinal direction of the belt body 110. Therefore, there are fewer constraints on the length of the radiating elements 17 and 18. By making the radiating elements 17 and 18 longer in the RFID tag 10, communication performance can be improved. For example, the communication distance can be increased. In contrast, if the average extension direction of the radiating elements aligns with the shorter side of the belt body, the length of the radiating elements is constrained by the width of the belt body. Therefore, communication performance may be reduced. 【0066】 The first radiating element 17 is electrically connected to the matching circuit 16 at the first connection point 25 via a metal joint 27 (see Figure 6) formed by soldering or the like. The second radiating element 18 is electrically connected to the matching circuit 16 at the second connection point 26 via a metal joint 28 (see Figure 6) formed by soldering or the like. As a result, the electrical connection characteristics between the radiating elements 17, 18 and the matching circuit 16 are good. 【0067】 The radiating elements 17 and 18 have high tensile strength because they are formed from linear bodies. When the industrial belt 100 runs on the pulleys 101 and 102, tensile forces may be applied to the radiating elements 17 and 18 in the direction of the belt length, but because the radiating elements 17 and 18 have high tensile strength, wire breakage is unlikely to occur. 【0068】 [Industrial belt] (Second embodiment) Figure 9 is a plan view showing the internal structure of the industrial belt 200 according to the second embodiment. As shown in Figure 9, the industrial belt 200 is equipped with an RFID tag 210. The RFID tag 210 differs from the RFID tag 10 shown in Figure 5 in that it uses an antenna 212 instead of an antenna 12. Note that components common to both the RFID tag 10 (see Figure 5) and the RFID tag 210 are denoted by the same reference numerals and their explanation is omitted. 【0069】 The antenna 212 comprises a first radiating element 217 and a second radiating element 218. The first radiating element 217 comprises a first extension portion 241 and a second extension portion 242. The first extension portion 241 extends from the first connection point 25 to the outside of the base material 11 in a plan view. More specifically, the first extension portion 241 extends from the first connection point 25 in the +X direction and reaches the outside of the base material 11 (the +X side of the base material 11) in a plan view. The first extension portion 241 extends in the longitudinal direction of the belt body 110. 【0070】 The second extension portion 242 comprises a plurality of main extension portions 31 and a plurality of folded portions 32. The average extension direction of the second extension portion 242 is the +X direction. 【0071】 The second radiating element 218 comprises a first extension portion 341 and a second extension portion 342. The first extension portion 341 extends from the first connection point 25 to the outside of the base material 11 in a plan view. More specifically, the first extension portion 341 extends from the second connection point 26 in the -X direction and reaches the outside of the base material 11 (the -X side of the base material 11) in a plan view. The first extension portion 341 extends in the longitudinal direction of the belt body 110. 【0072】 The second extension portion 342 comprises a plurality of main extension portions 131 and a plurality of folded portions 132. The average extension direction of the second extension portion 342 is the -X direction. 【0073】 The RFID tag 210 is positioned such that the longitudinal direction of the base material 11 intersects the longitudinal direction of the belt body 110. Preferably, the longitudinal direction of the base material 11 is aligned with the short direction of the belt body 110. The RFID tag 210 is arranged such that the average extension direction of the radiating elements 217 and 218 intersects the short direction of the belt body 110. Preferably, the average extension direction of the radiating elements 217 and 218 is along the longitudinal direction of the belt body 110. 【0074】 [Effects of the industrial belt of the second embodiment] Since the base material 11 of the RFID tag 210 is positioned so that its longitudinal direction aligns with the short direction of the belt body 110, the force applied to the base material 11 by the bending of the industrial belt can be suppressed. Therefore, the base material 11 can be made less susceptible to damage. Since the RFID tag 210 is arranged so that the average extension direction of the radiating elements 217 and 218 aligns with the longitudinal direction of the belt body 110, there are fewer constraints on the length of the radiating elements 217 and 218. Therefore, by making the radiating elements 217 and 218 longer, communication performance can be improved. For example, the communication distance can be increased. 【0075】 Since the first extension portions 241 and 341 of the radiating elements 217 and 218 extend from the connection points 25 and 26 in the short-side direction of the base material 11, the RFID tag 210 can have a smaller dimension in the Y direction. Therefore, it can be applied to industrial belts with narrow widths. 【0076】 [Industrial belt] (Third embodiment) Figure 10 is a plan view of the RFID tag 310 on an industrial belt according to the third embodiment. As shown in Figure 10, the RFID tag 310 differs from the RFID tag 210 shown in Figure 9 in that it uses an electromagnetic field coupling coil 316. Note that components common to both the RFID tag 210 (see Figure 9) and the RFID tag 310 are denoted by the same reference numerals and their explanations are omitted. 【0077】 The electromagnetic field coupling coil 316 is formed in a helical shape with the Y-axis passing through the center of the base material 11 as its central axis. The electromagnetic field coupling coil 316 surrounds the base material 11. The electromagnetic field coupling coil 316 is electromagnetically coupled to the matching circuit 16 (see Figure 6) without contact. In this way, the electromagnetic field coupling coil 316 is electrically connected to the matching circuit 16 (see Figure 6). 【0078】 The first extension portion 241 of the first radiating element 217 extends in the +X direction from one end (the +Y direction end) of the electromagnetic field coupling coil 316. The first extension portion 341 of the second radiating element 218 extends in the -X direction from the other end (the -Y direction end) of the electromagnetic field coupling coil 316. 【0079】 [Effects of the industrial belt of the third embodiment] Since the base material 11 of the RFID tag 310 is positioned so that its longitudinal direction aligns with the short direction of the belt body 110, the force applied to the base material 11 by the bending of the industrial belt can be suppressed. Therefore, the base material 11 can be made less susceptible to damage. Since the RFID tag 310 is arranged so that the average extension direction of the radiating elements 217 and 218 aligns with the longitudinal direction of the belt body 110, there are fewer constraints on the length of the radiating elements 217 and 218. Therefore, by making the radiating elements 217 and 218 longer, communication performance can be improved. For example, the communication distance can be increased. 【0080】 Since the RFID tag 310 has an electromagnetic field coupling coil 316 that is connected to the matching circuit 16 in a non-contact manner, metal joining such as soldering is unnecessary, making it easy to manufacture. 【0081】 Figure 11 is a plan view showing a modified example of the radiating element, radiating element 317. As shown in Figure 11, the radiating element 317 has a meander shape. The radiating element 317 comprises a plurality of linear main extensions 331 and a plurality of folded portions 332. The main extensions 331 are linear in shape along the Y direction. The plurality of main extensions 331 are spaced apart in the X direction. The folded portions 332 alternately connect one end of adjacent main extensions 331 to the other end. The folded portions 332 have a curved shape (for example, an arc shape). 【0082】 The radiating element 317 is easier to manufacture than a radiating element with a wound section (see Figure 5). The radiating element 317 is lighter than a radiating element with a wound section (see Figure 5). [Examples] 【0083】 [Example 1] As shown in Figure 4, an industrial belt 100 equipped with an RFID tag 10 was fabricated. The base material 11 of the RFID tag 10 is positioned so that its longitudinal direction aligns with the short direction of the belt body 110. The average extension direction of the radiating elements 17 and 18 aligns with the longitudinal direction of the belt body 110. 【0084】 [Comparative Example 1] Figure 12 is a plan view showing the internal structure of the industrial belt 300 of Comparative Example 1. As shown in Figure 12, the RFID tag 410 of the industrial belt 300 differs from the RFID tag 10 used in Example 1 in that the average extension direction of the radiating elements 417 and 418 of the antenna 412 is parallel to the longitudinal direction of the base material 11. The radiating elements 417 and 418 extend in directions away from each other. The length of the radiating elements 417 and 418 is equal to the length of the second extension portions 42 and 142 of the radiating elements 17 and 18 in Example 1. 【0085】 The base material 11 of the RFID tag 410 is positioned so that its longitudinal direction aligns with the longitudinal direction of the belt body 110. The average extension direction of the radiating elements 417 and 418 also aligns with the longitudinal direction of the belt body 110. 【0086】 For Example 1 and Comparative Example 1, the theoretical communication distance was investigated inside an anechoic chamber using an information read / write device (product name: Tag Formancelite, manufactured by Voyantic). Figure 13 shows the results of the investigation into theoretical communication distance. The horizontal axis represents frequency, and the vertical axis represents theoretical communication distance. As shown in Figure 13, in Example 1, the resonant frequency is slightly shifted to a lower frequency side compared to Comparative Example 1, but the theoretical communication distance of Example 1 is not significantly lower than that of Comparative Example 1. The decrease in resonant frequency is also within the range of impedance adjustment. From these results, it was confirmed that good communication performance can be obtained in Example 1. 【0087】 Although embodiments of the present invention have been described above, the configurations and combinations thereof in the embodiments are merely examples, and additions, omissions, substitutions, and other modifications to the configurations are possible without departing from the spirit of the present invention. Furthermore, the present invention is not limited by the embodiments. As shown in Figure 5, the substrate 11 of the RFID tag 10 is rectangular, but the shape of the substrate is not limited to a rectangle. Two directions (first direction and second direction) are assumed to run along the first main surface of the substrate. The first direction and the second direction are orthogonal to each other. The substrate only needs to have different dimensions in the first direction and the second direction. The planar shape of the substrate may be, for example, an ellipse, an oblong, a rounded quadrilateral, a polygon, etc. In the RFID tag 10, the average extension direction of some of the radiating elements 17 and 18 is set to intersect the short direction of the belt body 110, but the average extension direction of all of the radiating elements may intersect the short direction of the belt body. The RFID tag 10 comprises a base material 11, an IC chip 13, a circuit 16, and an antenna 12, but the RFID tag may also comprise a base material, an IC chip, and an antenna. In that case, the antenna is directly connected to the IC chip. 【0088】 As shown in Figures 7 and 8, the radiating elements 17 and 18 of the RFID tag 10 are formed as linear bodies, but the radiating elements may also be plate-shaped or layered. 【0089】 The industrial belt 100 shown in Figure 3 is a toothed belt having teeth 115. The industrial belt 100 transmits power by the teeth 115 engaging with the meshing grooves of the drive pulley 101 and the driven pulley 102. The industrial belt in this embodiment may also be a friction transmission belt that transmits power by frictional force between itself and the pulleys. Examples of friction transmission belts include V-belts, V-ribbed belts, and flat belts. 【0090】 A V-belt is a friction transmission belt with a substantially trapezoidal cross-section of the belt body perpendicular to the belt length direction, where the width narrows from the outer circumferential surface to the inner circumferential surface, and may have a plurality of inwardly projecting protrusions. The plurality of protrusions are provided at a constant pitch in the belt length direction. Recesses are formed between adjacent protrusions. The protrusions may be formed to extend in the belt width direction, or to extend obliquely to the belt width direction. 【0091】 A V-ribbed belt has one or more protrusions. The protrusions project inward and are formed along the length of the belt. For example, the cross-section of the protrusions perpendicular to the length of the belt is substantially trapezoidal. A flat belt is a friction transmission belt in which the cross-section of the belt body perpendicular to the belt length direction is approximately rectangular in shape, and the width direction is wider than the thickness direction. 【0092】 Furthermore, the industrial belt of the embodiment may be a double cog belt having projections on the inner circumferential surface side that protrude inward and are provided at a constant pitch in the belt length direction, and projections on the outer circumferential surface side that protrude outward and are provided at a constant pitch in the belt length direction. 【0093】 Furthermore, the industrial belt of the embodiment may be a serpentine belt having a plurality of projections on the inner circumferential surface side that protrude inward and are provided at a constant pitch in the belt length direction, and one or more projections on the outer circumferential surface side that protrude outward and are formed along the belt length direction. 【0094】 The industrial belt in this embodiment is not limited to a power transmission belt, but may also be a conveyor belt for transporting goods. As described above, the industrial belt of the embodiment is preferably used as a power transmission belt or a conveyor belt, but its application is not particularly limited. [Explanation of symbols] 【0095】 10,210,310...RFID tag (contactless data transmitter / receiver), 11...Base material, 12,212...Antenna, 13...IC chip, 15...Temperature sensor, 16...Matching circuit (circuit), 17...First radiating element (radiating element), 18...Second radiating element (radiating element), 25...First connection point (connection point), 26...Second connection point (connection point), 27,28...Metal joint, 41,141,241...First extension part, 42,142,242...Second extension part, 100,200...Industrial belt, 101...Drive pulley (rotating body), 102...Driven pulley (rotating body), 110...Belt body.

Claims

[Claim 1] An industrial belt used as a power transmission belt wrapped around a rotating body, or as a conveyor belt for transporting goods, It comprises a contactless data transmitter / receiver and a flexible belt body on which the contactless data transmitter / receiver is installed, The aforementioned contactless data receiver / transmitter is A plate-shaped base material, An IC chip provided on the substrate, A circuit provided on the substrate and electrically connected to the IC chip, An antenna having a pair of radiating elements electrically connected to the circuit, at least a portion of which extends outside the substrate, Equipped with, The base material is arranged such that its longitudinal direction intersects the longitudinal direction of the belt body. An industrial belt in which at least a portion of the radiating elements has an average extension direction that intersects the short-side direction of the belt body. [Claim 2] The industrial belt according to claim 1, wherein the radiating element is electrically connected to the circuit via a metal joint at the connection point. [Claim 3] The aforementioned radiating element is A first extension extending from the connection point toward the outside of the substrate in the longitudinal direction of the substrate, The industrial belt according to claim 2, comprising: a second extension portion starting from the tip of the first extension portion and having the longitudinal direction of the belt body as the average extension direction. [Claim 4] The industrial belt according to claim 2, wherein the radiating element extends from the connection point in the longitudinal direction of the belt body. [Claim 5] An industrial belt according to any one of claims 1 to 4, which is a power transmission belt wrapped around a rotating body to transmit power. [Claim 6] The industrial belt according to any one of claims 1 to 5, wherein the non-contact data receiver / transmitter is equipped with a temperature sensor.

Images