JP6927907B2 - Multi-member mounting structure - Google Patents

Description

The present invention relates to a mounting structure for a plurality of members.

For example, the mica heater has a structure in which a heating wire is wound around a plate-shaped core material formed by using mica (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2009-23192

The heating wire is electrically connected to the power source, for example, via a screw member and an electrode. As such a connection structure, a structure in which an electrode is attached to a screw member crimped with a heating wire can be exemplified. The screw member includes, for example, a caulking portion that collectively sandwiches a heating wire, a flat plate-shaped terminal plate, and a mica plate that is an insulating member, and a screw shaft portion that extends from the caulking portion. Have. The caulking portion is plastically deformed by a caulking tool in a state where the heating wire, the terminal plate, and the mica plate are overlapped with each other, so that the caulking portion sandwiches the heating wire, the terminal plate, and the mica plate. Then, a plate-shaped electrode is fixed to the screw shaft portion.

In such a configuration, the mica plate, which is an insulating member, receives heat from the heating wire for a long period of time, so that the mica component becomes thin and the portion of the mica plate crimped to the crimped portion becomes thin. Become. As a result, the bonding force between the crimped portion and the mica plate is reduced, and at the same time, the bonding force between the crimped portion and the heating wire is also reduced. It is preferable that such an unintended decrease in binding force does not occur.

Similar problems exist not only in mica heaters but also in other devices having a configuration in which a plurality of members are coupled by caulking.

In view of the above circumstances, it is an object of the present invention to provide a mounting structure for a plurality of members capable of suppressing a change in the coupling state between the crimped portion and the crimped member crimped by the crimped portion.

(1) In order to solve the above problems, the mounting structure of the plurality of members according to a certain aspect of the present invention is such that a plurality of caulking members including a plate-shaped member and the plurality of the caulking members are coupled to each other by caulking. A terminal member including a portion and a shaft portion integrally formed with the crimped portion to which a predetermined member to be fastened is attached, and a terminal member that is coupled to the shaft portion and fastened to the terminal member. It is provided with a fastening member to be fastened, the fastened member, and an insulating member that is arranged apart from the crimped portion and fixes the plate-shaped member.

According to this configuration, the crimped portion and the insulating member are arranged apart from each other. Therefore, the state of connection between the crimped portion and the crimped member is not affected by the state of the insulating member. Therefore, even if the insulating member is deteriorated by being provided with a deterioration generating element such as high-temperature heat for a long period of time and the thickness of the insulating member is reduced, the caulking portion and the caulked member are bonded to each other. It is possible to more reliably suppress the influence on the state. According to the above, it is possible to realize a mounting structure of a plurality of members capable of suppressing a change in the coupling state between the crimped portion and the crimped member crimped by the crimped portion.

(2) The insulating member includes a through-hole portion through which the terminal member passes, and the crimped portion is arranged in the through-hole portion of the insulating member when viewed in the axial direction of the through-hole portion of the insulating member. May have been.

According to this configuration, it is possible to maintain a state in which the crimped portion and the insulating member are separated from each other in a compact configuration.

(3) The caulking member includes a strip-shaped member formed in a width narrower than the width of the plate-shaped member and superposed on the plate-shaped member, and the caulking portion sandwiches the plate-shaped member and the strip-shaped member. It may be crimped and deformed.

According to this configuration, it is possible to more reliably suppress that the bonding force between the crimped portion and the plate-shaped member and the strip-shaped member is lowered due to the deterioration of the insulating member.

(4) The plate-shaped member includes a through-hole portion through which the terminal member penetrates, and the strip-shaped member extends from the front surface to the back surface of the plate-shaped member through the through-hole portion of the plate-shaped member. , The plate-shaped member may be crimped by the caulking portion around the through hole portion.

According to this configuration, a larger bonding area between the band-shaped member and the plate-shaped member can be secured, so that the bonding force between the band-shaped member and the plate-shaped member can be further increased.

(5) The strip-shaped member may be arranged at a plurality of locations in the circumferential direction of the through hole portion of the plate-shaped member.

According to this configuration, the distribution of the load acting on the crimped portion can be more evened in the circumferential direction of the through hole portion of the plate-shaped member. As a result, it is possible to prevent the crimping portion (terminal member) from being tilted with respect to the plate-shaped member. Further, the number of engagement points between the crimped portion and the strip-shaped member can be increased. As a result, the bonding force between the crimped portion and the strip-shaped member can be further increased.

(6) A plurality of the strip-shaped members are provided, one said strip-shaped member may include a resistance heat generating member, and the other strip-shaped member other than the one strip-shaped member may include a dummy member.

According to this configuration, if a dummy member is provided, it is not necessary to provide a plurality of strip-shaped members for heat generation of resistance for the purpose of coupling with the crimped portion. As a result, the posture of the crimped portion coupled with the plurality of strip-shaped members can be made more stable, and the degree of freedom in setting the shape of the strip-shaped member for heat generation of resistance can be increased.

(7) The plate-shaped member includes a terminal plate formed of metal, the terminal plate includes a through hole portion through which the terminal member penetrates, and the terminal plate is viewed in a plan view. It may be fixed to the insulating member at a plurality of fixing points arranged so as to sandwich the terminal member.

According to this configuration, the terminal plate can be bonded to the insulating member with higher strength.

According to the present invention, it is possible to realize a mounting structure of a plurality of members capable of suppressing a change in the coupling state between the crimped portion and the crimped member crimped by the crimped portion.

It is a schematic plan view of the mica heater as a heating device which has the attachment structure of a plurality of members which concerns on one Embodiment of this invention. It is a partial sectional view of the mounting structure, and shows the state where the mounting structure is viewed from the side. It is a perspective view which shows the state which a part of the mounting structure was assembled, and shows the state which was seen from the back surface side of a mica plate. It is a figure which shows the state which the mounting structure was seen from the back surface side of the mica plate. It is a schematic diagram of the main part of a spin caulking machine and a mica heater. It is a figure for demonstrating the assembly of a mounting structure. It is a schematic side view of the sample structure before the simulated caulking process, and a part thereof is shown in a cross section. It is a flowchart for demonstrating an example of the flow of setting the caulking deformation amount. It is a figure for demonstrating the evaluation of the surface scratch, FIG. 9A is a plan view which shows the state which the surface scratch has not occurred, and FIG. 9B is the state which the surface scratch is a passing level. 9 (C) is a cross-sectional view taken along the line IXC-IXC of FIG. 9 (B), and FIG. 9 (D) shows a state in which surface scratches are at a passing level. FIG. 9 (E) is a plan view showing a state in which the surface scratches are too deep and are at a reject level. FIG. 9 (E) is a cross-sectional view taken along the line IXE-IXE of FIG. Indicates a pass level. It is a figure which shows the modification.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a schematic plan view of a mica heater 1 as a heating device having a mounting structure 4 for a plurality of members according to an embodiment of the present invention. In the following, the mounting structure 4 of the plurality of members is also simply referred to as “mounting structure 4”. FIG. 2 is a partial cross-sectional view of the mounting structure 4, showing a state in which the mounting structure 4 is viewed from the side. FIG. 3 is a perspective view showing a state in which a part of the mounting structure 4 is assembled, and shows a state seen from the back surface 2b side of the mica plate 2. FIG. 4 is a view showing a state in which the mounting structure 4 is viewed from the surface 2a side of the mica plate 2.

With reference to FIGS. 1 to 4, the mica heater 1 is used to apply heat to the periphery of the mica heater 1. The mica heater 1 is installed in, for example, a heat treatment apparatus for manufacturing semiconductors, a heat treatment apparatus for manufacturing flat panel displays, and the like. In this embodiment, an example in which the mica heater 1 is used in a heat treatment apparatus will be described. Examples of the heat treatment performed by this heat treatment apparatus include a CVD (Chemical Vapor Deposition) treatment, a diffusion treatment, an annealing treatment, a solar cell manufacturing treatment, and a semiconductor device manufacturing treatment. The mica heater 1 may be provided in a heat treatment apparatus for heat-treating metal parts such as gears and power transmission shafts. The mica heater 1 is arranged around the heat treatment chamber of the heat treatment apparatus. The use of the mica heater 1 may be other than the above-mentioned use, and the specific use is not limited.

In the present embodiment, the mica heater 1 is formed in a rectangular shape as a whole, and the mica plate 2 around which the band-shaped heat generating member 3 as the resistance heat generating member is wound is sandwiched between another pair of mica plates (not shown). have. Although a heater using mica will be described as an embodiment of the present invention, the present invention may be applied to a heater using an insulating member other than mica.

The mica heater 1 is electrically and mechanically connected to a pair of electrode portions 5 and 5. The pair of electrode portions 5 and 5 are electrically connected to a power source (not shown) via the corresponding coated electric wires 6 and 6.

Each electrode portion 5 is a metal member formed by using a crimp terminal or the like. Each electrode portion 5 includes a flat plate-shaped portion 5a, and a through-hole portion 5b is formed in the flat plate-shaped portion 5a. The electrode portions 5 and 5 are also mechanically and electrically connected to the electric wires at one ends of the corresponding coated electric wires 6 and 6 by caulking or the like. The electric wire of each covered electric wire 6 is electrically connected to a power source (not shown). With the above configuration, electric power from the power source is supplied to the mica heater 1.

The mica heater 1 has a mica plate 2, a band-shaped heat generating member 3, and mounting structures 4 and 4 for mounting the band-shaped heat generating member 3 to the electrode portion 5.

The mica plate 2 is a flat plate-like member containing mica (mica) as a main component, and is provided as a frame portion in the mica heater 1. The mica plate 2 is an example of the "insulating member" of the present invention, and has a property of not conducting electricity. In the present embodiment, the mica plate 2 is formed in a rectangular plate shape having a thickness of about several mm. One end and the other end of the mica plate 2 in the longitudinal direction include a terminal mounting portion 2c, respectively. Each terminal mounting portion 2c is a portion where the mounting structure 4 is provided. A through hole portion 2d is formed in each terminal mounting portion 2c. The through hole portion 2d is formed in a circular shape in the present embodiment. The shape of the through hole portion 2d may be a shape other than a circular shape. A band-shaped heat generating member 3 is wound around the mica plate 2.

The band-shaped heat generating member 3 is a thermoelectric conversion member that converts electric power given from a power source through the electrode portions 5 and 5 into heat. The heat generated by the band-shaped heat generating member 3 becomes the heat generated by the mica heater 1. The band-shaped heat generating member 3 is an elongated band-shaped plate member, and is configured to generate heat at a predetermined temperature when a predetermined electric power is applied. The band-shaped heat generating member 3 has, for example, a structure in which impurities that serve as resistance are mixed in metal. The band-shaped heat generating member 3 has flexibility. The thickness of the band-shaped heat generating member 3 is, for example, about 1 mm. The width of the band-shaped heat generating member 3 is, for example, about several mm, and is formed to be narrower than the width of the terminal plate 7 described later. The band-shaped heat generating member 3 is spirally wound around the outer surface of the mica plate 2 and extends from one terminal mounting portion 2c to the other terminal mounting portion 2c. The number of turns of the band-shaped heat generating member 3 wound around the mica plate 2 is appropriately set according to the shape and performance of the heat treatment apparatus on which the mica plate 2 is installed.

One end portion 3a of the band-shaped heat generating member 3 is connected to one electrode portion 5 via one mounting structure 4. Similarly, the other end portion 3b of the band-shaped heat generating member 3 is connected to the other electrode portion 5 via the other mounting structure 4. In the following, since one mounting structure 4 and the other mounting structure 4 have the same configuration, one mounting structure 4 provided on the one end portion 3a side will be described, and the other mounting structure 4 will be described. A detailed description will be omitted. As described above, one of the mounting structures 4 is provided for mounting one end 3a of the band-shaped heat generating member 3 to the electrode portion 5.

The mounting structure 4 includes a terminal mounting portion 2c of the mica plate 2, a terminal plate 7 mounted on the terminal mounting portion 2c, one end portion 3a of the band-shaped heat generating member 3 along the terminal plate 7, and a band-shaped heat generating member 3. A dummy member 8 arranged adjacent to one end 3a of the above and along the terminal plate 7, a pair of washers 21 and 22 sandwiching the one end 3a and the dummy member 8, one end 3a of the band-shaped heat generating member 3, and a dummy member. 8. It has a terminal member 10 for caulking and fixing the electrode portion 5 and washers 21 and 22 to each other, an electrode portion 5, and a pair of nut members 11 and 12 screwed to the terminal member 10.

The electrode portion 5 is an example of the "fastened member" of the present invention. The terminal plate 7, one end 3a of the band-shaped heat generating member 3, the dummy member 8, and the washers 21 and 22 are examples of the "caulking member" of the present invention, respectively. Further, the terminal plate 7 is an example of the "plate-shaped member" of the present invention. Further, the band-shaped heat generating member 3 is an example of the "one band-shaped member" and the "resistive heat generating member" of the present invention, and the dummy member 8 is an example of the "other band-shaped member" of the present invention. The nut member 11 is an example of the "fastening member" of the present invention.

The terminal plate 7 is a stay member for attaching the terminal member 10 to the terminal attachment portion 2c of the mica plate 2. In the present embodiment, the terminal plate 7 is formed by using a conductive member such as an aluminum alloy plate. In the present embodiment, the terminal plate 7 is formed in a rectangular flat plate shape, and is formed in an elongated rectangular shape. Both the horizontal width and the vertical width of the terminal plate 7 are set wider than the width of the band-shaped heat generating member 3 (the length in the direction orthogonal to the longitudinal direction of the band-shaped heat generating member 3) and the width of the dummy member 8. The thickness of the terminal plate 7 may be smaller or larger than the thickness of the terminal mounting portion 2c of the mica plate 2.

The terminal plate 7 is along the surface 2a of the mica plate 2, for example. The terminal plate 7 covers the through hole portion 2d of the terminal mounting portion 2c of the mica plate 2. A through hole portion 7a is formed in a portion of the terminal plate 7 that covers the through hole portion 2d of the terminal mounting portion 2c. The through hole portion 7a of the terminal plate 7 is a portion through which the terminal member 10 penetrates, and a portion through which one end portion 3a of the band-shaped heat generating member 3 and the dummy member 8 pass. The size of the through-hole portion 7a of the terminal plate 7 is smaller than the size of the through-hole portion 2d of the mica plate 2, and in a plan view (viewed from the axial direction S1 of the terminal member 10), the through-hole portion of the mica plate 2 A through hole portion 7a of the terminal plate 7 is arranged in the region where 2d is formed. Fixed piece portions 7b are formed at, for example, four corners of the terminal plate 7.

The fixed piece portion 7b is a piece provided for fixing the terminal plate 7 to the terminal mounting portion 2c of the mica plate 2. Each fixing piece portion 7b extends from a portion of the terminal plate 7 along the front surface 2a of the mica plate 2 to the back surface 2b side of the mica plate 2, and a fixing hole portion formed at a corresponding portion of the mica plate 2. It is plugged into 2e. Then, a portion of the terminal plate 7 along the surface 2a of the mica plate 2 and a fixed piece portion 7b cooperate with each other to sandwich the terminal mounting portion 2c of the mica plate 2.

With the sandwiching structure described above, the terminal plate 7 is fixed to the mica plate 2 as an insulating member. Further, as shown in FIG. 4, when the terminal plate 7 is viewed in a plan view, a plurality of fixed points (fixed) arranged with the terminal member 10 sandwiched on the virtual straight lines A1 and A2 passing through the central axis L1 of the terminal member 10. The terminal plate 7 is fixed to the mica plate 2 at a portion (where one portion 7b is located). In the present embodiment, the virtual straight lines A1 and A2 intersect each other in a plan view. Two fixed piece portions 7b are arranged on one virtual straight line A1, and two fixed piece portions 7b are arranged on the other virtual straight line A2. In this way, the fixing piece 7b is fixed at four points around the central axis L1.

With reference to FIGS. 1 to 4 again, the peripheral edge portion of the through hole portion 7a of the terminal plate 7 is overlapped with the one end portion 3a of the band-shaped heat generating member 3 and the dummy member 8.

The dummy member 8 is a member that imitates one end 3a of the band-shaped heat generating member 3. The dummy member 8 is made of the same material as the material of the band-shaped heat generating member 3, an insulating material, or the like, and has flexibility. The dummy member 8 is a member intended not to be energized (heat generated), and is formed separately from the band-shaped heat-generating member 3 and separated from the band-shaped heat-generating member 3. The thickness and width of the dummy member 8 are set to be the same as those of the band-shaped heat generating member 3. The length of the dummy member 8 is, for example, a value of less than about 100 mm, which is about the same as the length of one end 3a of the band-shaped heat generating member 3. The width of the dummy member 8 may be larger or smaller than the width of the band-shaped heat generating member 3.

The dummy member 8 and the band-shaped heat generating member 3 extend from the front surface 7c to the back surface 7d of the terminal plate 7 through the through hole portion 7a of the terminal plate 7, and the terminal member 10 is caulked around the through hole portion 7a, which will be described later. It is crimped by part 13. In the present embodiment, one end 3a of the band-shaped heat generating member 3 and the dummy member 8 are arranged apart from each other in the circumferential direction of the through hole portion 7a of the terminal plate 7 (that is, the circumferential direction C1 of the terminal member 10). .. One end 3a and the dummy member 8 of the band-shaped heat generating member 3 are arranged, for example, in the circumferential direction C1 at a pitch of 180 degrees. In this way, one end 3a and the dummy member 8 of the band-shaped heat generating member 3 as the plurality of band-shaped members are arranged at a plurality of locations in the circumferential direction of the through hole portion 7a. A plurality of dummy members 8 may be provided, and one end 3a of the band-shaped heat generating member 3 and the plurality of dummy members 8 may be arranged apart from each other in the circumferential direction C1 at equal pitch or unequal pitch in the circumferential direction C1.

In the present embodiment, the dummy member 8 is aligned with the front surface 7c and the back surface 7d of the terminal plate 7 and the back surface 2b of the mica plate 2. Similarly, one end 3a of the band-shaped heat generating member 3 is aligned with the front surface 7c and the back surface 7d of the terminal plate 7 and the back surface 2b of the mica plate 2. One end portion 3a and the dummy member 8 of the band-shaped heat generating member 3 are electrically and mechanically connected to the electrode portion 5 via the terminal member 10.

The terminal member 10 is caulked and coupled to the one end portion 3a of the band-shaped heat generating member 3 and the dummy member 8, and is coupled to the electrode portion 5 by a fastening mechanism by screw fastening. The terminal member 10 is a screw shaft-shaped member, and penetrates through the through hole portion 2d of the terminal mounting portion 2c of the mica plate 2 and the through hole portion 7a of the terminal plate 7. In the present embodiment, the terminal member 10 is an integrally molded product formed by using a metal member. The terminal member 10 may be formed by combining a plurality of members. In the present embodiment, the terminal member 10 sandwiches the terminal plate 7, but is arranged at a distance from the mica plate 2. That is, the caulking portion 13 described later of the terminal member 10 is arranged at a distance from the mica plate 2 as an insulating member. Seen in the axial direction S1 (which is also the axial direction of the through hole portion 2d), the entire terminal member 10 including the caulking portion 13 described later is arranged in the through hole portion 2d of the mica plate 2.

The terminal member 10 is a caulking portion 13, a screw shaft portion 14 formed integrally with the caulking portion 13 to which the electrode portion 5 is attached, and a tool attachment portion to which a mounting tool 100 that receives torque acting on the screw shaft portion 14 is attached. It has 15 and.

The caulking portion 13 is provided to connect one end portion 3a of the band-shaped heat generating member 3 and the dummy member 8 as caulking members by caulking. The caulking portion 13 is formed at the base end portion of the terminal member 10. In the present embodiment, the caulking portion 13 is formed over the entire area of the terminal member 10 in the circumferential direction C1, but may be formed in a part of the circumferential direction C1.

The caulking portion 13 has a main body portion 16, a base portion 17, and a plastically deformed portion 18.

The main body portion 16 is a shaft portion of the caulking portion 13, and is a shaft portion that passes over the central axis L1 of the terminal member 10.

The base portion 17 is provided to receive a portion of the one end portion 3a and the dummy member 8 of the band-shaped heat generating member 3 that are arranged on the back surface 7d side of the terminal plate 7. The base portion 17 is a portion formed in an annular shape, and has an annular surface extending in a direction orthogonal to the axial direction S1 of the terminal member 10. The base portion 17 receives one end portion 3a of the band-shaped heat generating member 3 and a dummy member 8 via a washer 22. The washer 22 is formed by using a conductive member such as metal. The washer 22 is arranged in, for example, the through-hole portion 2d of the mica plate 2 and faces the peripheral edge portion of the through-hole portion 7a of the terminal plate 7 in the axial direction S1. The plastic deformation portion 18 is arranged so as to face the base portion 17 and the axial direction S1.

The plastic deformation portion 18 is provided to receive a portion of the one end portion 3a and the dummy member 8 of the band-shaped heat generating member 3 that are arranged on the surface 7c side of the terminal plate 7. The plastic deformation portion 18 is arranged at the base end portion of the terminal member 10. The plastically deformed portion 18 is a portion formed in an annular shape, and is an annular portion extending in the radial direction R1 of the terminal member 10. The plastically deformed portion 18 is formed into a shape extending in the radial direction R1 by being plastically deformed by a caulking punch 33 described later. The shape of the plastically deformed portion 18 before being plastically deformed by the caulking punch 33 is formed, for example, in a cylindrical shape (pillar shape). The plastically deformed portion 18 is formed with a recessed portion 18a on the proximal end side of the terminal member 10.

The plastic deformation portion 18 receives one end portion 3a of the band-shaped heat generating member 3 and a dummy member 8 via a washer 21. The washer 21 is formed in the same shape as the washer 22 by using the same material as the washer 22. The washer 21 faces the peripheral edge of the through hole portion 7a of the terminal plate 7 in the axial direction S1. With the above configuration, the washer 21, the one end portion 3a of the band-shaped heat generating member 3, the dummy member 8, the terminal plate 7, and the washer 22 are strengthened by caulking between the base portion 17 and the plastically deformed portion 18. It is sandwiched between.

That is, the caulking portion 13 is caulked and deformed so as to sandwich the terminal plate 7, one end portion 3a of the band-shaped heat generating member 3, the dummy member 8, and the washers 21 and 22. A tool mounting portion 15 is arranged adjacent to the caulking portion 13 having the above configuration.

The tool mounting portion 15 is a portion with which a mounting tool 100 such as a spanner or a wrench is engaged. In the present embodiment, the tool mounting portion 15 is continuous with the main body portion 16 and the base portion 17 of the caulking portion 13, and one end of the tool mounting portion 15 is integrally formed with the base portion 17. The tool mounting portion 15 and the caulking portion 13 may be arranged apart from each other in the axial direction S1. The tool mounting portion 15 has a polygonal cross-sectional shape (hexagonal shape in the present embodiment) perpendicular to the axial direction S1. The length of the tool mounting portion 15 in the axial direction S1 is preferably equal to or greater than the thickness of the portion of the mounting tool 100 that engages with the tool mounting portion 15. In the present embodiment, the thickness of the tool mounting portion 15 is set to be larger than the thickness of the caulking portion 13 (the length in the axial direction S1).

The outer peripheral portion of the tool mounting portion 15 has a width across flats portion 15a. The width across flats portion 15a is formed side by side with the screw shaft portion 14 in the axial direction S1. The width across flats 15a has a pair of planes parallel to each other extending along the axial direction S1. In the present embodiment, since the tool mounting portion 15 is formed in a hexagonal cross section, three sets of width across flat portions 15a are formed. It should be noted that at least a pair of width across flats 15a may be provided, and the cross-sectional shape of the tool mounting portion 15 may be a polygonal shape other than a hexagonal shape or a shape including a curved line. The mounting tool 100 receives torque (load around C1 in the circumferential direction) acting on the terminal member 10 by engaging with at least one set of three sets of width across flat portions 15a. A screw shaft portion 14 is provided adjacent to the tool mounting portion 15 having the above configuration and the axial direction S1.

As described above, the screw shaft portion 14 is a portion to which the electrode portion 5 is attached. A male screw is formed on the outer peripheral portion of the screw shaft portion 14. The outer diameter of the screw shaft portion 14 is set to be less than the outer diameter (maximum outer diameter) of the tool mounting portion 15. A washer 23, a flat plate-shaped portion 5a of the electrode portion 5, and a washer 24 are passed through the screw shaft portion 14. The washers 23 and 24 are formed by using a conductive member such as metal. The washers 23 and 24 sandwich the flat plate-shaped portion 5a of the electrode portion 5. Of the washers 23 and 24, a pair of nut members 11 and 12 are arranged adjacent to the washer 24 arranged on the tip end side of the screw shaft portion 14.

The nut members 11 and 12 are provided to fasten the electrode portion 5 as a member to be fastened to the terminal member 10 by being screwed to the screw shaft portion 14. The nut members 11 and 12 are, for example, hexagon nuts. When one of the nut members 11 is screwed to the screw shaft portion 14, the nut member 11 and the tool mounting portion 15 cooperate with each other to fasten the electrode portion 5 to the terminal member 10. Then, the other nut member 12 is fastened to the one nut member 11 with a predetermined torque to prevent the one nut member 11 from loosening. The nut member 12 may be omitted.

The above is the schematic configuration of the mica heater 1.

Next, with reference to FIG. 5, the configuration of the spin caulking machine 30 for caulking the caulking portion 13 will be described. FIG. 5 is a schematic view of the main parts of the spin caulking machine 30 and the mica heater 1.

In this embodiment, a mode in which spin caulking is adopted for caulking of the caulking portion 13 will be described as an example, but this may not be the case. The caulking process of the caulking portion 13 may be performed by a caulking process method other than spin caulking, such as caulking process using a chisel.

The spin caulking machine 30 includes a drive motor 31 which is an electric motor, a spindle 32 which is arranged in a vertical position and is rotationally driven by the drive motor 31, a caulking punch 33 as a caulking tool fixed to the spindle 32, and a drive motor 31. It has a moving mechanism 34 for linearly moving the spindle 32 and the caulking punch 33 in the vertical direction, and a control unit 35 for controlling the drive motor 31 and the moving mechanism 34.

The moving mechanism 34 has, for example, a hydraulic mechanism, a ball screw mechanism, or the like, and supports the housing of the drive motor 31. With this configuration, during caulking, a pressing force that pressurizes the end face 18b of the plastically deformed portion 18 of the caulking portion 13 acts on the caulking punch 33.

The caulking punch 33 is attached to one end of the spindle 32. The caulking punch 33 is formed in a pin shape having a central axis L3 extending inclined with respect to the rotation axis L2 of the main shaft 32.

The control unit 35 has a configuration for outputting a predetermined output signal based on a predetermined input signal, and can be formed by using, for example, a safety programmable controller or the like. The safety programmable controller means a publicly certified programmable controller having the safety function of SIL2 or SIL3 of JIS (Japanese Industrial Standards) C 0508-1. The control unit 35 may be formed by using a computer including a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory).

FIG. 6 is a diagram for explaining the assembly of the mounting structure 4. With reference to FIGS. 5 and 6, when assembling the mounting structure 4 having the above configuration, the worker first fixes the terminal plate 7 to the terminal mounting portion 2c of the mica plate 2. Next, the worker passes one end 3a of the band-shaped heat generating member 3 and the dummy member 8 through the through hole 7a of the terminal plate 7. After that, the worker sandwiches the one end portion 3a of the band-shaped heat generating member 3, the dummy member 8, and the terminal plate 7 with the washers 21 and 22. Next, the worker passes the plastic deformation portion 18 before the plastic deformation in the caulking portion 13 of the terminal member 10 through the through hole portion of the washers 21 and 22 and the through hole portion 7a of the terminal plate 7. After that, the worker plastically deforms the plastic deformed portion 18 using the spin caulking machine 30, so that the plastic deformed portion 18 and the base portion 17 have washers 21 and 22, one end portion 3a of the band-shaped heat generating member 3, and a dummy member. 8 and the terminal plate 7 are sandwiched.

After that, as shown in FIG. 2, the worker passes the washer 23, the flat plate-shaped portion 5a of the electrode portion 5, and the washer 24 through the screw shaft portion 14. Next, the worker screw-couples the nut members 11 and 12 to the screw shaft portion 14 with the mounting tool 100 engaged with the tool mounting portion 15.

With reference to FIGS. 5 and 6 again, the mica plate 2 is placed on the work table 36 during spin caulking by the spin caulking machine 30. Further, for example, the screw shaft portion 14 of the terminal member 10 is supported by the support member 37 or the like. Then, at the time of spin caulking, first, the rotation axis L2 of the main shaft 32 is arranged so as to overlap the central axis L1 of the terminal member 10. Then, by driving the drive motor 31 of the spin caulking machine 30, the main shaft 32 and the caulking punch 33 rotate around the rotation axis L2. In this state, the caulking punch 33 is linearly displaced toward the caulking portion 13 along the axial direction S1 by driving the moving mechanism 34. By this operation, the outer peripheral portion of the tip of the caulking punch 33 pressurizes the end face 18b of the cylindrical plastic deformation portion 18 before being plastically deformed.

Then, the tip of the caulking punch 33 rotates around the rotation axis L2 while pressurizing the plastic deformed portion 18, so that the plastic deformed portion 18 is expanded outward in the radial direction R and is plastic toward the base portion 17 side. Transform. The amount of caulking deformation D1 is the amount at which the caulking punch 33 comes into contact with the end surface 18b of the plastic deformation portion 18 and then the caulking punch 33 is linearly displaced toward the end surface 18b during caulking. It can be said that the caulking deformation amount D1 is an amount that plastically deforms the base end surface 18b of the plastic deformation portion 18 along the axial direction S1. By the above-mentioned operation of the spin caulking machine 30, the plastic deformation portion 18 expands in the radial direction R1 and is pressed against the washer 21, and the caulking process is completed. The amount of plastic deformation of the plastic deformation portion 18 by the spin caulking machine 30 at this time, that is, the amount of caulking deformation D1, is set in advance.

Next, a method of setting the caulking deformation amount D1 will be described.

More specifically, a caulking portion that joins the terminal plate 7 as a plurality of caulking members superposed on each other, one end portion 3a of the band-shaped heat generating member 3, the dummy member 8, and the washers 21 and 22 by caulking. A method of setting the caulking deformation amount D1 of 13 will be described.

In the present embodiment, the caulking deformation amount D1 is set based on the result of simulating the caulking process using the configuration imitating the configuration related to the caulking portion 13 in the mounting structure 4.

FIG. 7 is a schematic side view of the mounting structure sample 4S before the simulated caulking process is performed, and a part thereof is shown in cross section. With reference to FIGS. 6 and 7, the mounting structure sample 4S is a structure used for setting the caulking deformation amount D1, and has a configuration imitating a configuration related to the caulking portion 13 in the mounting structure 4. ing. In other words, the mounting structure sample 4S has the same configuration as a part of the mounting structure 4.

The mounting structure sample 4S includes a mica plate sample 2S, a terminal plate sample 7S, a band-shaped heat generating member sample 3S, a dummy member sample 8S, washer samples 21S and 22S, and a terminal member sample 10S.

The mica plate sample 2S, the terminal plate sample 7S, the band-shaped heat generating member sample 3S, the dummy member sample 8S, the washer samples 21S and 22S, and the terminal member sample 10S are the corresponding mica plate 2 and the terminal plate 7, respectively. Since one end portion 3a of the band-shaped heat generating member 3, the dummy member 8, the washers 21 and 22, and the terminal member 10 have the same configuration, detailed description thereof will be omitted.

The terminal plate sample 7S, the band-shaped heat generating member sample 3S, the dummy member sample 8S, and the washer samples 21S and 22S are examples of the "caulking member sample as a sample of a plurality of caulking members" of the present invention. Further, the terminal plate sample 7S is an example of the "plate-shaped member sample" of the present invention. The band-shaped heat-generating member sample 3S and the dummy member sample 8S are examples of the "belt-shaped member sample" of the present invention, and the band-shaped heat-generating member sample 3S is also an example of the "resistive heat-generating member sample". The crimped portion sample 13S of the terminal member sample 10S is an example of the “crimped portion sample” of the present invention.

The band-shaped heat generating member sample 3S and the dummy member sample 8S extend through the through hole portion 7a of the terminal plate sample 7S from the front surface 7c to the back surface 7d of the terminal plate sample 7S, and the caulking portion sample 13S is formed around the through hole portion 7a. Is crimped by.

Further, the crimped portion sample 13S has a base portion 17 and a plastically deformed portion 18. The base portion 17 receives the terminal plate sample 7S, the band-shaped heat generating member sample 3S, the dummy member sample 8S, and the washer samples 21S and 22S. The plastically deformed portion 18 collaborates with the base portion 17 by plastically deforming to crimp the terminal plate sample 7S, the band-shaped heat generating member sample 3S, the dummy member sample 8S, and the washer samples 21S and 22S.

Next, an example of the flow of setting the caulking deformation amount D1 using the mounting structure sample 4S will be described.

FIG. 8 is a flowchart for explaining an example of the flow of setting the caulking deformation amount D1. In the following, when the explanation is made with reference to the flowchart, the drawings other than the flowchart will be referred to as appropriate. In addition, each step in the present embodiment is an example of the "step" of the present invention.

With reference to FIG. 8, when the caulking deformation amount D1 is set, the worker first prepares the mounting structure sample 4S shown in FIG. 7 (step S1). In the caulking sample structure 4S, the terminal plate sample 7S, the band-shaped heat generating member sample 3S, the dummy member sample 8S, and the washer samples 21S and 22S, which are overlapped with each other, are crimped portion samples of the terminal member sample 10S before being caulked. It is attached to 13S.

Next, the operator or the control unit 35 of the spin caulking machine 30 sets the simulated caulking deformation amount D2 (step S2). The simulated caulking deformation amount D2 is a predetermined plastic deformation amount in which the plastic deformation portion 18 of the caulking portion sample 13S is plastically deformed by using the spin caulking machine 30. The simulated caulking deformation amount D2 is an amount that displaces the end face 18b of the plastic deformation portion 18 along the axial direction of the terminal member sample 10S, and corresponds to the caulking deformation amount D1. The simulated caulking deformation amount D2 is also the amount of movement of the caulking punch 33 in the axial direction S1 after the caulking punch 33 starts pressurizing the caulking portion sample 13S. The variable n when step S2 is first executed is n = 1.

Next, simulated caulking is performed using the spin caulking machine 30 (step S3). In the simulated caulking, the plastic deformation portion 18 of the caulking portion sample 13S is plastically deformed with the simulated caulking deformation amount D2 to simulate the caulking process of the plastic deformation portion 18 of the caulking portion 13.

At the time of simulated caulking, the position is adjusted so that the rotation axis L2 of the main shaft 32 overlaps with the center axis L1S of the terminal member 10S. Then, by driving the drive motor 31 of the spin caulking machine 30, the main shaft 32 and the caulking punch 33 rotate in the circumferential direction around the rotation axis L2. In this state, the caulking punch 33 is linearly displaced toward the caulking portion sample 13S side along the axial direction S1 by driving the moving mechanism 34. By this operation, the outer peripheral portion of the tip of the caulking punch 33 pressurizes the end face 18b of the plastically deformed portion 18 in the caulked portion sample 13S before being plastically deformed. Then, the tip of the caulking punch 33 is rotated around the rotation axis L2 while pressurizing the plastic deformation portion 18, so that the plastic deformation portion 18 is plastically deformed toward the base portion 17.

That is, the plastically deformed portion 18 of the crimped portion sample 13S is plastically deformed from the state of being formed in a cylindrical shape (pillar shape) toward the base portion 17 side, so that the terminal plate is cooperated with the base portion 17. It is crimped so as to sandwich the sample 7S, the band-shaped heat generating member sample 3S, the dummy member sample 8S, and the washer samples 21S and 22S. At this time, the amount of linear displacement of the caulking punch 33 toward the end face 18b after the caulking punch 33 comes into contact with the end face 18b (after the start of pressurization) is the simulated caulking deformation amount D2. By this simulated caulking, the caulking portion sample 13S is caulked and deformed so as to sandwich the terminal plate sample 7S, the band-shaped heat generating member sample 3S, the dummy member sample 8S, and the washer samples 21S and 22S.

After the simulated caulking is completed, the worker evaluates the result of the simulated caulking performed in step S3 (step S4). Specifically, the worker disassembles the mounting structure sample 4S after spin caulking. As a result, the terminal plate sample 7S, the band-shaped heat generating member sample 3S, the dummy member sample 8S, and the washer samples 21S and 22S are separated from each other. In the present embodiment, among the band-shaped heat-generating member sample 3S and the dummy member sample 8S, for example, the band-shaped heat-generating member sample 3S is the evaluation target in the evaluation step. Then, the worker evaluates the surface scratch 41 formed on the contact portion 42 overlapping the terminal plate sample 7S at the peripheral edge portion of the through hole portion 7a of the terminal plate sample 7S in the band-shaped heat generating member sample 3S. The surface scratches of the dummy member sample 8S may be evaluated by the same method as the surface scratches 41.

9A and 9B are views for explaining the evaluation of the surface scratch 41, FIG. 9A is a plan view showing a state in which the surface scratch 41 is not generated, and FIG. 9B is a plan view showing the surface scratch 41. Is a plan view showing a pass level, and FIG. 9 (C) is a cross-sectional view taken along the line IXC-IXC of FIG. 9 (B), showing a state in which the surface scratch 41 is a pass level. 9 (D) is a plan view showing a state in which the surface scratch 41 is too deep and is at a reject level, and FIG. 9 (E) is a cross-sectional view taken along the line IXE-IXE of FIG. 9 (D). It shows a state in which the surface scratch 41 is too deep and is at a failing level.

As described above with reference to FIGS. 7 to 9 (E), the surface scratch 41 faces (contacts) the edge portion of the through hole portion 7a of the terminal plate sample 7S of the band-shaped heat generating member sample 3S, for example. It is a scratch generated in the contact portion 42. At the time of evaluation of the surface scratch 41, the band-shaped heat generating member sample 3S is in a flat and unfolded state.

A predetermined sharpened member 43 is used for the evaluation of the surface scratch 41. The sharpened member 43 is, for example, a needle-shaped member having an acute-angled tip. When the sharpened member 43 does not substantially get caught even if the sharpened member 43 passes through the surface scratch 41 of the contact portion 42, the evaluation is OK. The simulated caulking deformation amount D2 when the evaluation is OK is set as the caulking deformation amount D1.

More specifically, with reference to FIGS. 9 (B) and 9 (C), when evaluating the surface scratch 41, the worker is bare-handed, for example, the contact portion 42 of the surface of the band-shaped heat generating member sample 3S. A sharp member 43 is applied to the periphery. Then, the worker moves the sharpened member 43 in, for example, the longitudinal direction N1 of the strip-shaped heat generating member sample 3S at a constant speed, and causes the sharpened member 43 to pass through the contact portion 42. Trace the surface scratch 41). Then, when the feel of the worker's hand does not change before and after passing through the surface scratch 41, the evaluation is OK.

On the other hand, as shown in FIG. 9A, when the surface scratch 41 is not visually confirmed by the worker, the evaluation is NG. Further, as shown in FIGS. 9 (D) and 9 (E), since the surface scratch 41 is deep, the feel of the worker's hand changes through the sharp member 43 before and after passing through the surface scratch 41, and the sharp member Even when 43 is caught, the evaluation is NG.

The determination of evaluation OK is not limited to the determination method described above. For example, with reference to FIGS. 9B and 9C, the sharpened member 43 may be connected to the ultrasonic transducer in order to use the sharpened member 43 as a probe. At this time, whether or not the evaluation is OK based on the signal waveform of the received signal of the ultrasonic vibrator when the sharpened member 43 traces the periphery of the contact portion 42 on the surface of the band-shaped heat generating member sample 3S along the longitudinal direction N1. May be determined. For example, in the signal waveform when the presence of the surface scratch 41 is visually confirmed by the worker and the sharp member 43 traces the surface scratch 41 and the periphery of the surface scratch 41, the surface scratch 41 passes through and the surface scratch 41 is traced. When the change in signal strength in the signal waveform is several percent or less (in the case of a change in noise level) when passing through other than 41, it is determined that the evaluation is OK.

On the other hand, as shown in FIG. 9A, when the surface scratch 41 is not visually confirmed by the worker, the evaluation is NG. Further, as shown in FIGS. 9 (D) and 9 (E), due to the deep surface scratch 41, in the above signal waveform, when the surface scratch 41 passes through the sharpened member 43 and when the surface scratch 41 passes through other than the surface scratch 41. If the change in signal strength is greater than a few percent, the evaluation is NG.

As a result of the evaluation in step S4, it is sufficient that the contact portion 42 has a surface scratch 41 that does not substantially cause the sharp member 43 to be caught even if the sharp member 43 passes through, which is a specific evaluation method. Is not limited to the above example. For example, an inspection device including an imaging camera, a non-contact flaw detection device using a laser beam or the like, and a control unit for controlling these cameras and the non-contact flaw detection device is prepared, and the above evaluation (the above evaluation) is performed using this inspection device. Step S4) may be performed.

Further, in the present embodiment, the surface scratch 41 of the contact portion 42 is the evaluation target, but this may not be the case. Of the terminal plate sample 7S, the band-shaped heat generating member sample 3S, and the dummy member sample 8S, the portion where stress concentration is likely to occur due to excessive caulking may be evaluated.

As a result of the evaluation in step S4, the surface scratch 41 is not generated as shown in FIG. 9A, or the surface scratch 41 is too deep as shown in FIGS. 9D and 9E. As a result, when the evaluation result of the surface scratch 41 is NG (NO in step S4), one value of the variable n is added (incremented) (step S5). That is, in the evaluation step (step S4), if the simulated caulking deformation amount D2 is evaluated to be unsuitable as the caulking deformation amount D1, the process proceeds to step S5.

Then, another mounting structure sample 4S is prepared again (step S1). Next, the nth simulated caulking deformation amount D2 (n in this case is a natural number of 2 or more) is set (step S2). After that, simulated caulking is performed (step S3). After that, the result of the nth simulated caulking step is evaluated (step S4).

Regarding the setting of the simulated caulking deformation amount D2 in step S2, the simulated caulking deformation amount D2 when n = 1 is set to a relatively small value, and the simulated caulking deformation amount D2 is increased as the value of n increases. good. In this case, as shown in FIG. 9A, the surface scratch 41 is evaluated without the surface scratch 41 until it is determined that the evaluation is OK in step S4 (step S4).

On the other hand, regarding the setting of the simulated caulking deformation amount D2 in step S2, the simulated caulking deformation amount D2 when n = 1 is set to a comparatively large value, and the simulated caulking deformation amount D2 is reduced as the value of n increases. May be good. In this case, as shown in FIGS. 9 (D) and 9 (E), the surface scratch 41 is evaluated in a deep state until the evaluation is determined to be OK in step S4 (step). S4).

The simulated caulking deformation amount D2 may be increased as the value of the variable n increases, and the simulated caulking deformation amount D2 may be decreased as the value of the variable n increases after n exceeds a predetermined value. .. Further, the simulated caulking deformation amount D2 may be decreased as the value of the variable n increases, and the simulated caulking deformation amount D2 may be increased as the value of the variable n increases after n exceeds a predetermined value. ..

Then, as shown in FIGS. 9B and 9C, the simulated caulking deformation amount D2 when the surface scratch 41 that is the evaluation OK occurs (YES in step S4) is set as the caulking deformation amount D1. (Step S5).

As described above, according to the present embodiment, the terminal member 10 has a tool mounting portion 15 for suppressing the action of torque on the caulking portion 13. According to this configuration, when the worker attaches the nut member 11 to the screw shaft portion 14 of the terminal member 10 and fastens the electrode portion 5 to the terminal member 10 using the nut member 11, the tool attachment portion of the terminal member 10 The mounting tool 100 can be mounted on 15. As a result, the torque acting on the screw shaft portion 14 from the nut member 11 is received by the mounting tool 100 via the tool mounting portion 15 and does not act on the crimped portion 13 of the terminal member 10. Therefore, the above torque does not act between the terminal plate 7, the one end portion 3a of the band-shaped heat generating member 3, the dummy member 8, the washers 21 and 22, and the caulking portion 13. That is, it is possible to suppress a change in the coupling state between the terminal plate 7 crimped by the crimped portion 13, one end portion 3a of the band-shaped heat generating member 3, the dummy member 8, the washers 21 and 22, and the crimped portion 13. Further, it is surely suppressed that unnecessary torque from the screw shaft portion 14 acts between the terminal plate 7, the one end portion 3a of the band-shaped heat generating member 3, the dummy member 8, the washers 21 and 22, and the caulking portion 13. can. As a result, when the electrode portion 5 is fastened to the terminal member 10, it is possible to save the labor of the worker to care so as not to apply an extra torque to the caulking portion 13.

Further, according to the present embodiment, the tool mounting portion 15 includes a width across flat portion 15a parallel to each other. According to this configuration, a highly versatile mounting tool 100 such as a spanner or a wrench can be mounted on the tool mounting portion 15.

Further, according to the present embodiment, the tool mounting portion 15 is configured to fasten the electrode portion 5 in cooperation with the nut member 11. According to this configuration, the tool mounting portion 15 can exhibit a function of fixing the electrode portion 5 in addition to the function of engaging with the mounting tool 100.

Further, according to the present embodiment, the torque acting when the nut member 11 is attached to the screw shaft portion 14 is between the thin dummy member 8 and the thin band-shaped heat generating member 3 used as a heating wire, and the caulking portion 13. It can suppress the action. Further, the bonding force between the terminal plate 7, the band-shaped heat generating member 3, the dummy member 8, the washers 21 and 22, and the caulking portion 13 is reduced due to the decrease in thickness due to the deterioration of the mica plate 2. It can be surely suppressed.

Further, according to the present embodiment, the band-shaped heat generating member 3 and the dummy member 8 extend through the through hole portion 7a of the terminal plate 7 from the front surface 7c to the back surface 7d of the terminal plate 7, and the through hole portion of the terminal plate 7 extends. It is crimped by the caulking portion 13 around 7a. According to this configuration, a larger bonding area between the terminal plate 7, the band-shaped heat generating member 3 and the dummy member 8 can be secured, so that the bonding force between the band-shaped heat generating member 3 and the dummy member 8 and the terminal plate 7 can be further increased. ..

Further, according to the present embodiment, the band-shaped heat generating member 3 and the dummy member 8 are arranged at a plurality of locations in the circumferential direction of the through hole portion 7a of the terminal plate 7 as a whole. According to this configuration, the distribution of the load acting on the caulking portion 13 can be more evened in the circumferential direction C1. As a result, it is possible to prevent the caulking portion 13 (terminal member 10) from tilting with respect to the terminal plate 7. Further, the number of engagement points between the crimped portion 13 and the band-shaped heat generating member 3 and the dummy member 8 can be increased. As a result, the coupling force between the crimped portion 13 and the band-shaped heat generating member 3 and the dummy member 8 can be further increased.

Further, in the configuration in which the dummy member 8 is provided as in the present embodiment, the band-shaped heat generating member 3 for resistance heat generation needs to be engaged with the crimped portion 13 at a plurality of places for the purpose of coupling with the crimped portion 13. There is no. As a result, the posture of the crimped portion 13 coupled to the band-shaped heat generating member 3 and the dummy member 8 can be made more stable, and the degree of freedom in setting the shape of the band-shaped heat generating member 3 for resistance heat generation can be increased.

Further, according to the present embodiment, the metal terminal plate 7 is fixed to the mica plate 2 which is an insulating member. According to this configuration, the metal terminal plate 7 crimped to the crimped portion 13 together with the band-shaped heat generating member 3 and the dummy member 8 is supported by the mica plate 2 which is an insulating member, so that the terminal plate 7 and the band-shaped heat generating member 3 And the dummy member 8 can be electrically stabilized.

Further, according to the present embodiment, the terminal plate 7 is fixed to the mica plate 2 at a plurality of fixing points (4 points in the present embodiment) arranged across the terminal member 10 when the terminal plate 7 is viewed in a plan view. Has been done. According to this configuration, the terminal plate 7 can be bonded to the mica plate 2 which is an insulating member with higher strength. In particular, even when a torque acts on the terminal member 10 when the nut member 11 is attached to the screw shaft portion 14 of the terminal member 10, the terminal plate 7 receives this torque without rotating around the screw shaft portion 14. Can be done.

Further, according to the present embodiment, the caulking portion 13 is caulked and deformed without sandwiching the terminal plate 7, the band-shaped heat generating member 3, and the dummy member 8 and the mica plate 2 which is an insulating member. According to this configuration, the band-shaped heat generating member 3 and the dummy member 8 do not need to be sandwiched between the crimped portion 13 and the mica plate 2. As a result, it is possible to prevent the band-shaped heat generating member 3 and the dummy member 8 from being scratched at the edge portion of the through hole portion 2d of the mica plate 2.

Further, according to the present embodiment, the caulking portion 13 and the mica plate 2 are arranged apart from each other. Therefore, the bonding state of the terminal plate 7, the band-shaped heat generating member 3, the dummy member 8, the washers 21 and 22, and the caulking portion 13 does not have to be affected by the state of the mica plate 2. Therefore, even if the mica plate 2 is deteriorated by receiving high temperature heat for a long period of time and the thickness of the mica plate 2 is reduced, the terminal plate 7, the band-shaped heat generating member 3, the dummy member 8 and the mica plate 2 are reduced. It is possible to more reliably suppress the influence on the bonding state of the washer 21 and 22 and the caulking portion 13. Therefore, it is possible to suppress a change in the coupling state between the crimped portion 13 and the terminal plate 7, the band-shaped heat generating member 3, the dummy member 8 and the washers 21 and 22 crimped to the crimped portion 13.

Further, according to the present embodiment, the caulking portion 13 is arranged in the through hole portion 2d of the mica plate 2 when viewed in the axial direction S1. According to this configuration, the crimped portion 13 and the mica plate 2 can be maintained in a more compact configuration in a state of being separated from each other.

Further, according to the present embodiment, the caulking deformation amount setting method for setting the caulking deformation amount D1 of the caulking portion 13 is a preparatory step (step S1) for preparing the mounting structure sample 4S and a simulated caulking step (step S3). And an evaluation step (step S4) for evaluating the result of the simulated caulking step. Then, in the evaluation step (step S4), a simulated caulking deformation amount when a surface scratch 41 that does not substantially cause the sharpened member 43 to be caught even when the sharpened member 43 passes is formed on the crimped portion sample 13S. D2 is set as the caulking deformation amount D1. According to this configuration, the simulated caulking step (step S3) is performed in an environment extremely close to the actual caulking environment. Then, in the evaluation step (step S4), the surface scratch 41 of the band-shaped heat generating member sample 3S as a result of actually caulking the sample structure 4S is directly evaluated. With such an evaluation method, an appropriate caulking deformation amount D1 can be set more accurately. Further, since an appropriate caulking deformation amount D1 is set based on a more objective index, it is not necessary to set a different caulking deformation amount D1 for each worker performing the caulking work. Further, in the evaluation step (step S4), a simulated caulking deformation amount when a surface scratch 41 is formed on the band-shaped heat generating member sample 3S so that the sharp member 43 does not substantially get caught even if the sharp member 43 passes through. D2 is set as the caulking deformation amount D1. By such an original evaluation method, the caulking deformation amount D1 that is neither excessive nor undersized can be set. Based on the above, it is possible to realize a caulking deformation amount setting method capable of setting the caulking amount of the caulking portion 13 more appropriately.

Further, according to the present embodiment, an appropriate caulking deformation amount D1 is set by a simple method of gradually reducing or increasing the simulated caulking deformation amount D2 of the caulking portion sample 13S in the second and subsequent simulated caulking steps (step S3). can do.

Further, according to the present embodiment, in the simulated caulking step (step S3), the caulking portion sample 13S is caulked and deformed so as to sandwich the terminal plate sample 7S, the band-shaped heat generating member sample 3S, and the dummy member sample 8S. According to this configuration, an appropriate caulking deformation amount D1 can be set in a configuration in which the wide terminal plate 7, the narrow band-shaped heat generating member 3 and the dummy member 8 are crimped to the caulking portion 13 in a state of being overlapped with each other. ..

Further, according to the present embodiment, the surface scratch 41 to be evaluated in the evaluation step (step S4) overlaps with the terminal plate sample 7S at the peripheral edge of the through hole portion 7a of the terminal plate sample 7S in the band-shaped heat generating member sample 3S. It is a scratch formed on the contact portion 42. According to this configuration, in the configuration in which the band-shaped heat generating member 3 is fixed to the crimped portion 13 at the portion passing through the through hole portion 7a of the terminal plate 7, it is appropriate based on the portion where scratches are likely to occur due to the coupling with the crimped portion 13. The amount of caulking deformation D1 can be set.

Further, according to the present embodiment, it is possible to set an appropriate amount of caulking deformation D1 of the caulking portion 13 in the heater (belt-shaped heating member 3) used as a heating wire.

Further, according to the present embodiment, only one of the base portion 17 and the plastic deformed portion 18 (plastic deformed portion 18) is caulked and deformed in the crimped portion 13. Therefore, in the caulking step of the caulking portion 13 in each of the plurality of mica heaters 1, the reproducibility of the mode of plastic deformation in the caulking portion 13 can be further improved. As a result, it is possible to more reliably suppress the occurrence of individual differences in the bonding state between the caulking portion 13 and the caulking member (terminal plate 7, band-shaped heat generating member 3, dummy member 8, and washer 21 and 22).

Further, according to the present embodiment, the plastically deformed portion 18 formed in the shape of a pillar (cylindrical shape) is plastically deformed to form a caulked portion (terminal plate 7, band-shaped heat generating member 3, dummy member 8, and washer 21. 22) and the crimped portion 13 are combined. An appropriate caulking deformation amount D1 in such a configuration can be set.

Further, according to the present embodiment, in the simulated caulking step (step S3), the caulking punch 33 pressurizes the caulking portion sample 13S along the circumferential direction C1 and moves the caulking punch 33 in the linear movement direction (axial direction S1). As a result, spin caulking is performed in which the caulked portion sample 13S is plastically deformed. The simulated caulking deformation amount D2 and the caulking deformation amount D1 are the movement amounts of the caulking punch 33 in the linear movement direction (axial direction S1) after the caulking punch 33 starts pressurizing the caulking portion sample 13S. According to this configuration, the caulking deformation amount D1 can be expressed by the moving amount of the caulking punch 33 in the linear moving direction (axial direction S1). That is, the caulking deformation amount D1 can be set as a value that can be easily measured.

Based on the above, it is possible to realize the mounting structure 4 including the caulking portion 13 that is plastically deformed with an appropriate caulking deformation amount D1 that is neither excessive nor underestimated.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The present invention can be modified in various ways as described in the claims. In the following, the points different from the above-described embodiment will be mainly described, and the same components as those in the above-described embodiment may be designated by the same reference numerals and the description thereof may be omitted.

(1) In the above-described embodiment, a mode in which the mica plate 2 is arranged apart from the caulking portion 13 has been described as an example. However, this does not have to be the case. For example, as shown in the modified example of FIG. 10, the mica plate 2 may be arranged so as to be crimped by the caulking portion 13. In this modification, the through-hole portion 2d of the terminal mounting portion 2c of the mica plate 2 is formed to have substantially the same size as the through-hole portion 7a of the terminal plate 7, and these through-hole portions 2d and 7a are coaxial. Have been placed. The peripheral edge of the through hole 2d of the terminal mounting portion 2c is arranged between the base portion 17 of the caulking portion 13 and the plastic deformation portion 18. This peripheral edge portion is sandwiched between one end portion 3a of the band-shaped heat generating member 3 and the dummy member 8 in a state of being overlapped with the peripheral edge portion of the through hole portion 7a of the terminal plate 7. In this case, the caulking portion 13 is caulked and deformed so as to sandwich the terminal mounting portion 2c of the mica plate 2, the terminal plate 7, the band-shaped heat generating member 3, the dummy member 8, and the washers 21 and 22.

According to the modification shown in FIG. 10, the torque acting on the terminal member 10 when the worker attaches the nut member 11 to the screw shaft portion 14 of the terminal member 10 is due to the provision of the tool engaging portion 15. , The mica plate 2, the terminal plate 7, the band-shaped heat generating member 3, the dummy member 8, the washer 21 and 22, and the caulking portion 13 are suppressed from being transmitted. Therefore, the caulking portion 13 is prevented from slipping on the mica plate 2, the terminal plate 7, the band-shaped heat generating member 3, the dummy member 8, and the washers 21 and 22.

When setting the caulking deformation amount D1 in the configuration shown in FIG. 10, a sample structure imitating the caulking mounting structure shown in FIG. 10 is prepared, and steps S1 to S6 described above are performed using this sample structure. Become.

In the modified example shown in FIG. 10, the terminal mounting portion 2c of the mica plate 2 may be formed of a conductive member, and the portion other than the terminal mounting portion 2c may be formed of an insulating member.

(2) Further, in the above-described embodiment and modification, although the embodiment in which the washers 21 and 22 are provided has been described as an example, at least one of the washers 21 and 22 may be omitted.

(3) Further, in the above-described embodiment and modification, the dummy member 8 may be omitted.

(4) Further, in the above-described embodiment and modification, the embodiment in which the tool mounting portion 15 and the base portion 17 of the caulking portion 13 are integrally continuous has been described as an example, but this may not be the case. The tool mounting portion 15 and the base portion 17 of the caulking portion 13 may be separated from each other.

(5) Further, in the above-described embodiment and modification, the mode in which the band-shaped heat generating member 3 and the dummy member 8 pass through the through hole portion 7a of the terminal plate 7 has been described as an example, but this may not be the case. For example, at least one of the band-shaped heat generating member 3 and the dummy member 8 may be along the terminal plate 7 without passing through the through hole portion 7a of the terminal plate 7.

(6) Further, in the above-described embodiment and modified example, a configuration in which the electrode portion 5 is fastened to the terminal member 10 by screw-coupling the nut member 11 to the screw shaft portion 14 has been described as an example. However, this does not have to be the case. For example, in the terminal member 10, a cylindrical shaft without a thread groove may be provided in place of the screw shaft portion 14, and the electrode portion 5 may be fastened (fixed) to this shaft using a fastening member such as a pin or a hook. ..

(7) Further, in the above-described embodiment and modified example, the mica heater 1 has been described as an example. However, this does not have to be the case. For example, the present invention may be applied to heaters other than mica heaters. As such a heater, a heater using a film-shaped metal foil formed by etching as a resistance heating member can be exemplified. In addition, the present invention can be applied to devices other than heaters.

The present invention can be widely applied as a mounting structure for a plurality of members.

2 Mica plate (insulating member)
2d through hole (through hole of insulating member)
3 Band-shaped heat-generating member (caulking member, band-shaped member, resistance heat-generating member)
4 Mounting structure 5 Electrode part (member to be fastened)
7 Terminal plate (caulking member, plate-shaped member)
7a Through hole (through hole of plate-shaped member)
7c surface (surface of plate-shaped member)
7d back side (back side of plate-shaped member)
8 Dummy member (caulking member, strip-shaped member)
10 Terminal member 11 Nut member (fastening member)
13 Caulking part 14 Screw shaft part (shaft part)
21 and 22 washers (covering members)
C1 Circumferential direction S1 Axial direction

Claims (7)

Multiple caulking members, including plate-shaped members,
A caulking portion that connects a plurality of the caulked members to each other by caulking, and a terminal member including a shaft portion that is integrally formed with the caulked portion and to which a predetermined crimped member is attached.
A fastening member that is coupled to the shaft portion and fastens the fastened member to the terminal member,
With the member to be fastened
An insulating member that is arranged apart from the crimped portion and fixes the plate-shaped member,
A mounting structure of a plurality of members, characterized in that it is provided with. The mounting structure for a plurality of members according to claim 1.
The insulating member includes a through hole through which the terminal member passes.
A structure for mounting a plurality of members, wherein the crimped portion is arranged in the through hole portion of the insulating member when viewed in the axial direction of the through hole portion of the insulating member. The mounting structure for a plurality of members according to claim 1 or 2.
The caulking member includes a strip-shaped member formed with a width narrower than the width of the plate-shaped member and superposed on the plate-shaped member.
The caulking portion is a mounting structure of a plurality of members, characterized in that the caulking portion is caulked and deformed so as to sandwich the plate-shaped member and the strip-shaped member. The mounting structure for a plurality of members according to claim 3.
The plate-shaped member includes a through hole portion through which the terminal member penetrates.
The strip-shaped member extends from the front surface to the back surface of the plate-shaped member through the through-hole portion of the plate-shaped member, and is crimped by the caulking portion around the through-hole portion of the plate-shaped member. A mounting structure for multiple members. The mounting structure for a plurality of members according to claim 4.
The strip-shaped member is a mounting structure for the plurality of members, characterized in that the strip-shaped member is arranged at a plurality of locations in the circumferential direction of the through hole portion of the plate-shaped member. The mounting structure for a plurality of members according to any one of claims 3 to 5.
A plurality of the strip-shaped members are provided,
A plurality of member mounting structures, wherein one said strip-shaped member includes a resistance heat generating member, and the other strip-shaped member other than the one strip-shaped member includes a dummy member. The mounting structure for a plurality of members according to any one of claims 1 to 6.
The plate-shaped member includes a terminal plate formed of metal and includes a terminal plate.
The terminal plate includes a through hole portion through which the terminal member penetrates, and is fixed to the insulating member at a plurality of fixing points arranged so as to sandwich the terminal member when the terminal plate is viewed in a plan view. A mounting structure for multiple members.

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