JP2009117750A - Method of manufacturing plate resistance element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing plate resistance element in which a plate resistance element can be manufactured without wasting materials. <P>SOLUTION: The manufacturing method includes a groove forming step of forming grooves 30 and 40 for resistance value adjustment at portions of respective plate resistance elements 10-1 in a belt-like element plate 10A in order while forming feed holes 50 in the beltlike element plate 10A at predetermined intervals and feeding the element plate 10A using the feed holes 50 in a feed direction a1, and a cutting step of taking the plate resistance elements 10-1 as single-part bodies one after another by cutting the plate resistance element 10-1 where the grooves 30 and 40 are formed. The grooves 30 and 40 are formed having their lengths in a direction along the feed direction a1. The feed holes 50 are forme din the plate resistance elements 10-1. Cutting lines 14 formed by mutually cutting ends of the groove 30 of adjacent plate resistance elements 10-1 are formed sticking out and then one cutting line 14 is outer peripheries 11 and 13 of both adjacent plate element resistance elements 10-1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a plate resistance element.

  Conventionally, as shown in FIG. 1 of Patent Document 1, the plate resistance element is used as, for example, a fixed resistor. That is, this fixed resistor is configured by housing a plate resistor element (10) with a terminal (20) attached in a ceramic case (80) and filling and solidifying a filler (90) in the ceramic case (80). Has been. Here, the plate resistor element (10) is formed by forming a flat resistor plate (13) into a meandering strip by processing it by pressing, laser cutting or the like. However, when the plate resistor element (10) is processed by a press die, there are the following problems.

  FIG. 11 is a view showing an example of a plate resistance element 580 to which a conventional terminal 600 is attached, and FIG. 12 is an explanatory diagram of a method for manufacturing the plate resistance element 580. As shown in FIG. 12, in order to manufacture the plate resistance element 580, the strip-shaped element plate 630 is provided with feed holes 631 by press working with a press die at predetermined intervals, and is located between the feed holes 631. By forming a pair of upper and lower groove portions 581 in the plate resistor element 580, and then cutting the adjacent plate resistor elements 580 formed with the groove portions 581 with lines b1-b1 and b2-b2. Single plate resistor elements 580 were sequentially taken out.

  However, in the above-described conventional example, the connecting portion 640 extending in a strip shape in parallel with both sides of the element plate 630 is necessary. This is because, in this conventional example, the longitudinal direction c1 of the plate resistor element 580 meandering in the form of a narrow band is oriented in a direction perpendicular to the feed direction a1 of the element plate 630. If the portion 640 is not provided, the plate resistance element 580 having a meandering shape after the groove portion 581 is formed by press working is likely to have a spring property, and is easily extended or contracted in the feed direction a1 or swayed horizontally and vertically. This is because the process may not be performed with high accuracy. For this reason, it is necessary to attach the connecting portions 640 for reinforcement on both sides of the element plate 630 as described above.

  However, when the connecting portion 640 is provided, the dimension in the width direction of the element plate 630 increases accordingly, and the portion that is finally cut and wasted increases, and the material cost is wasted.

  FIG. 13 is a view showing an example of another plate resistance element 780 to which a conventional terminal 800 is attached, and FIG. 14 is an explanatory diagram of a method for manufacturing the plate resistance element 780. Even when the plate resistance element 780 is manufactured, a pair of feed holes 831 are provided near the both sides of the band-shaped element plate 830 by a press mold at predetermined intervals, and positions between the pair of feed holes 831 are also provided. The groove portion 781 is formed in the plate resistor element 780 in FIG. 6 and then the adjacent plate resistor elements 780 in which the groove portion 781 is formed are cut by the line b1-b1 and the line b2-b2. The plate resistance elements 780 were sequentially taken out. In the case of this conventional example, the meandering longitudinal direction c1 of the plate resistance element 780 meandering in the shape of a narrow strip is oriented in a direction parallel to the feed direction a1 of the element plate 830, and therefore the groove 781 is formed by pressing. Even if formed, the element plate 830 does not have a large spring property, and therefore the next cutting process can be performed with high accuracy without providing the connecting portion 640 as in the conventional example shown in FIG.

However, even in this conventional example, it is necessary to provide a feed hole forming portion 833 having a width L for forming the feed hole 831 between the plate resistance elements 780 formed on the element plate 830. Since the portion is finally cut and removed, material costs are wasted.
JP 2000-150201 A

  The present invention has been made in view of the above points, and an object of the present invention is to provide a method of manufacturing a plate resistance element capable of manufacturing a plate resistance element without wasting materials.

  According to the first aspect of the present invention, feed holes are provided at predetermined intervals in an element plate formed by connecting a plurality of plate resistance elements in a strip shape, and feed is sequentially performed in the feed direction using the feed holes provided in the element plate. However, a step of forming a groove portion that sequentially penetrates in a strip for adjusting the resistance value in each plate resistance element portion in the element plate to be sent, and a cutting between the adjacent plate resistance elements in which the groove portions are formed. And a step of sequentially taking out the single plate resistor element, and the groove portion is formed so that the longitudinal direction thereof is in the direction along the feed direction of the element plate. And the feed hole is formed in the plate resistance element.

  In the invention according to claim 2 of the present application, the end portion of the groove portion of the plate resistor element in the element plate is formed so as to protrude from one cutting line formed by the cutting, and by this one cutting line, 2. The plate resistor element according to claim 1, wherein a single plate resistor element having a groove portion cut out from the outer periphery is taken out by forming the outer periphery of adjacent plate resistor elements by cutting. In the manufacturing method.

  In the invention according to claim 3 of the present invention, the grooves formed in the plate resistance element of the element plate are formed in a staggered manner in a plurality in parallel in a direction that is linear in the feed direction and orthogonal to the feed direction. The end portions of the groove portions in the adjacent plate resistance elements are formed so as to protrude alternately from one cutting line, and the outer periphery of the adjacent plate resistance elements is formed by cutting along the one cutting line. The plate resistor element manufacturing method according to claim 1, wherein a single plate resistor element having a groove portion that is alternately cut from a pair of outer peripheries composed of the cutting lines is taken out.

  According to the first aspect of the present invention, since the feed hole is formed in the plate resistance element, it is not necessary to provide a space for forming the feed hole separately, and material is not wasted.

  According to the second and third aspects of the invention, since one cutting line is the outer periphery of both adjacent plate resistance elements, all of the element plates (excluding the portion cut out as a groove portion) are plate. It can be used as a resistance element, eliminating waste of materials.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a plate resistor element 10-1 with a terminal 70 according to the first embodiment of the present invention, and FIG. 2 is a fixed resistor 100- constructed using the plate resistor element 10-1 with a terminal 70. 1 is a front view of the plate resistance element 10-1, FIG. 3 is an explanatory view of the manufacturing method of the plate resistance element 10-1, and FIG. 4 is a front view of the plate resistance element 10-1. As shown in FIG. 1, the plate resistor element 10-1 is provided with a resistance value adjusting groove (coarse resistance value adjusting groove 30 and fine resistance value adjusting groove 40) on the resistor plate, and the plate resistor element 10- The feed hole 50 used in manufacturing 1 is used as a part of the fine resistance value adjusting groove 40. In the following description, “upper” means the upper side of the plate resistance element 10-1 shown in FIG. 1 (the opposite side from which the terminal 70 protrudes), and “lower” means the opposite side (the side from which the terminal 70 protrudes). Shall be said.

  The plate resistor element 10-1 has a substantially rectangular outer shape, and has a plurality of linear coarse resistance value adjusting groove portions that are alternately cut in the vertical direction from the upper side 11 and the lower side 13 that are the outer periphery thereof. 30 and fine resistance value adjusting groove portions 40 (in this embodiment, six coarse resistance value adjusting groove portions 30 and a single dot-like fine resistance value adjusting groove portion 40 in the center) are provided. A pair of terminals 70 are attached to the terminal connection portions 15 on both the left and right sides of the plate resistor element 10-1, for example, by spot welding. As a material of the resistance plate constituting the plate resistance element 10-1, various resistance materials such as a copper nickel alloy, a nickel chromium alloy, and an iron chromium alloy can be used. In this embodiment, copper is used as the material of the terminal 70, but other conductive materials such as iron may be used.

  The coarse resistance value adjusting groove 30 is formed by a single through groove having a predetermined width and extending linearly in the vertical direction. Three fine resistance value adjusting groove portions 40 are formed in the center of the plate resistance element 10-1 so as to be cut in a substantially dotted manner so as to cut downward from the upper side 11, and the uppermost fine resistance value adjusting groove portion is formed. Reference numeral 40 denotes a shape cut from the upper side 11, and the lower (intermediate) fine resistance value adjusting groove 40 is a small square hole, and the lower fine resistance value adjusting groove 40 extends in the vertical direction. It is a rectangular small hole. That is, the fine resistance value adjusting groove 40 is formed by arranging a plurality of holes or grooves in parallel with the coarse resistance value adjusting groove 30. In the plate resistance element 10-1, the lowest resistance value adjusting groove 40 is also used as the feed hole 50. As will be described below, the plurality of fine resistance value adjusting groove portions 40 are for finely adjusting the resistance value of the plate resistance element 10-1, and connect adjacent fine resistance value adjusting groove portions 40 to each other. The resistance value is finely adjusted by changing the state to be performed.

  A concave portion 17 formed of a shallow depression is formed on the upper side 11 or the lower side 13 in front of the tip portion (the deepest part of the cut) of each of the coarse resistance value adjusting groove portions 30 on the upper side 11 and the lower side 13 of the plate resistor element 10-1. Is provided. As will be described below, each recess 17 is formed by the end of the coarse resistance value adjusting groove 30 of another plate resistor 10-1 that is connected adjacently when the plate resistor 10-1 is formed. is there.

  Next, the manufacturing method of the plate resistance element 10-1 is demonstrated using FIG. In the figure, stages (1) to (4) are groove forming steps, and stage (5) is a cutting step.

(Groove formation process)
A long element plate 10A is prepared in a band shape. First, in the stage (1) shown in FIG. 3, one feed hole (pilot hole) 50 is formed in the vicinity of the center by a first press die (not shown). To do. The feed hole 50 simultaneously becomes one of the minute resistance value adjusting groove portions 40. In each of the following stages (2) to (5), a pilot pin (not shown) for feeding is inserted into the feed hole 50 to feed each plate resistance element 10-1 of the element plate 10A while sequentially positioning. The element plate 10A has a width H1 of 11 mm and a thickness of about 0.2 mm in this embodiment, and is thin, thin and easily bent.

  Next, in the stage (2) shown in FIG. 3, the coarse resistance value adjusting groove portions 30 on both the left and right sides (upper and lower sides in FIG. One adjacent small resistance value adjusting groove 40 is simultaneously formed by a second press die (cutting die) (not shown). Next, in the stage (3) shown in FIG. 3, one coarse resistance value adjusting groove 30 inside each of the both coarse resistance value adjusting grooves 30, and the fine resistance value adjusting formed by the stage (2). Another fine resistance value adjusting groove 40 adjacent to the groove 40 is simultaneously formed by a third press die (not shown). Next, in the stage (4) shown in FIG. 3, one coarse resistance value adjusting groove 30 inside each of the two coarse resistance value adjusting grooves 30 formed in the stage (3), and the stage (3) Another fine resistance value adjusting groove portion 40 adjacent to the formed fine resistance value adjusting groove portion 40 is simultaneously formed by a fourth press die (not shown). The coarse resistance value adjusting groove portion 30 and the fine resistance value adjusting groove portion 40 are formed little by little as described above. All the rough resistance value adjusting groove portions 30 and the fine resistance value adjusting groove portions are formed by a single press process. If the element plate 40 is to be formed, the element plate 10A is thin, thin and small as described above, so that the processed plate resistance element 10-1 may be distorted or the groove portion may not be pressed accurately. Because there is. Therefore, the required coarse resistance value adjusting groove 30 and fine resistance value adjusting groove 40 are formed little by little. The number and position of the coarse resistance value adjusting groove portions 30 and / or the fine resistance value adjusting groove portions 40 formed by one press working are not limited to the above embodiment, and various other changes are possible. Needless to say.

  The element plate 10A in which all the coarse resistance value adjusting groove portions 30 and the fine resistance value adjusting groove portions 40 are formed as described above is formed in one plate resistor element 10-1, as shown in the stage (5). The plurality of coarse resistance value adjusting groove portions 30 that are linear in the feed direction a1 and in a staggered manner in parallel in the direction orthogonal to the feed direction a1 (so as to alternate alternately) Are arranged so that the ends of the respective coarse resistance value adjusting groove portions 30 in the adjacent plate resistor elements 10-1 mesh with each other (in a straight line extending in the width direction orthogonal to the feed direction a1). On the other hand, the end portions are positioned so as to protrude alternately.

[Cutting process]
In the stage (5), each plate resistor element 10-1 is cut into individual pieces by a fifth press die (cutting die) (not shown). At this time, among the four fine resistance value adjusting groove portions 40 arranged in a row at the same time by the fifth press die, the two fine resistance value adjusting groove portions 40 on the front end side and the front end side (side to be the upper side 11) Cut to make a cut-out shape. Thus, the plate resistance element 10-1 shown in FIG. 4 is completed. That is, in this embodiment, the outer periphery (upper side 11 and lower side 13) of the adjacent plate resistor element 10-1 is formed by one cutting line 14, and the shape is cut alternately from the outer periphery (upper and lower sides 11, 13). It is possible to take out a single plate resistance element 10-1 having a plurality of grooves (coarse resistance value adjusting groove 30).

[Fixed resistor assembly process]
Then, as shown in FIG. 1, each of the terminal connection portions 15 near the left and right ends of the plate resistance element 10-1 shown in FIG. And attach. The terminal 70 may be attached before the plate resistance element 10-1 is made into an individual product, and then the plate resistance element 10-1 to which the terminal 70 is attached may be cut and made into an individual product. Next, as shown in FIG. 2, the plate resistance element 10-1 is accommodated in a ceramic case 80 with the tip of the terminal 70 protruding outward, and a filler (heat-resistant insulation) is accommodated in the case 80. In this embodiment, heat-resistant silicon cement (silica [SiO ₂ ] and silicon varnish [silicon resin] made into a paste with a solvent [xylene etc.], heated at 180 ° C. for 1 hour) is used. The fixed resistor 100-1 is completed.

  As described above, according to the plate resistance element 10-1 according to the present embodiment, the feed holes 50 are provided at predetermined intervals on the element plate 10A formed by connecting a plurality of plate resistance elements 10-1 in a strip shape. While sequentially feeding in the feeding direction a1 using the feed hole 50 provided in the element plate 10A, a groove portion (roughly penetrating in a strip shape for resistance value adjustment in each plate resistance element 10-1 portion in the element plate 10A to be fed. A groove portion forming step for forming the resistance value adjusting groove portion 30 and the fine resistance value adjusting groove portion 40), and adjacent plates on which the groove portions (the coarse resistance value adjusting groove portion 30 and the fine resistance value adjusting groove portion 40) are formed. A cutting step of sequentially taking out the single plate resistance elements 10-1 by cutting between the resistance elements 10-1, and the groove portions (the coarse resistance value adjusting groove portion 30 and the fine resistance value adjusting groove portion 40). ) That long Direction is a possible form so as to face the direction along the feed direction a1 of the element plate 10A, and forming the feed holes 50 in the plate resistive element 10-1. Thus, since the feed hole 50 is formed in the plate resistance element 10-1, it is not necessary to provide a space for forming the feed hole 50 separately, and the material is not wasted.

  Furthermore, in the present embodiment, the end portion of the groove portion (coarse resistance value adjusting groove portion 30) of the plate resistor element 10-1 in the element plate 10A is formed so as to protrude from one cutting line 14 formed by cutting. In addition, a groove portion (coarse resistance value) cut from the outer periphery (upper side 11 or lower side 13) by forming the outer periphery of adjacent plate resistance elements 10-1 by cutting along the one cutting line 14 The single plate resistor element 10-1 having the adjusting groove 30) is taken out. More specifically, the groove portion (the coarse resistance value adjusting groove portion 30) formed in the plate resistor element 10-1 of the element plate 10A is linear in the feed direction a1 and in the feed direction a1. By forming a plurality of staggered patterns in parallel in a direction orthogonal to each other, the end portions of the respective groove portions (coarse resistance value adjusting groove portions 30) in the adjacent plate resistance elements 10-1 are alternately protruded from one cutting line 14. The outer periphery of the adjacent plate resistor element 10-1 is formed by cutting with this one cutting line 14, thereby forming a pair of outer periphery (upper and lower sides 11, 13) composed of the cutting line 14. ), The single plate resistor element 10-1 having the groove portions (rough resistance value adjusting groove portions 30) that are alternately cut is taken out. As a result, in combination with the formation of the feed hole 50 in the plate resistance element 10-1, all of the element plate 10A (excluding portions removed as the groove portions 30 and 40) is used as the plate resistance element 10-1. And there is no waste of materials. The plate resistance element 10-1 according to this embodiment has a plurality of groove portions (rough resistance value adjusting groove portions 30) that are alternately cut from a pair of opposing outer peripheries (upper and lower sides 11, 13) formed by cutting lines 14. It is the shape which meanders in strip shape by providing.

  FIG. 5 is a view showing the plate resistance element 10-1 whose resistance value is finely adjusted by changing the shape of the fine resistance value adjusting groove 40. In the following embodiments (including FIG. 6 and the following), the same or corresponding parts as those in the embodiment shown in FIGS. Note that matters other than those described below are the same as those in the embodiment shown in FIGS.

  That is, when it is intended to manufacture a plate resistance element 10-1 having a resistance value slightly changed from that of the above-described embodiment, as shown in FIG. When the plate resistance elements 10-1 are cut into individual pieces by using a mold, at the same time, among the four fine resistance value adjusting groove portions 40 arranged in a row, the tip side 3 Two fine resistance value adjusting groove portions 40 and the tip side (side to be the upper side 11) are connected to each other and cut into a notched shape. Alternatively, as shown in FIG. 5 (b), among the four fine resistance value adjusting groove portions 40 arranged in a row, all four fine resistance value adjusting groove portions 40 and the tip side (side to be the upper side 11) and Cut to make a cut-out shape. Alternatively, as shown in FIG. 5C, of the four fine resistance value adjusting groove portions 40 arranged in a row, one fine resistance value adjusting groove portion 40 on the front end side and the front end side (side to be the upper side 11). And cut to form a notch. Alternatively, as shown in FIG. 5D, none of the four fine resistance value adjusting groove portions 40 arranged in a row are cut. As described above, by connecting or not connecting the four minute resistance value adjusting groove portions 40, it is possible to provide various types of plate resistance elements 10-1 having different resistance values by minute values. At that time, as the fifth press mold, a blade capable of changing the cut portion so as to appropriately connect or not connect the four fine resistance value adjusting groove portions 40 and the upper side 11 of the fifth press mold. If a press mold having a structure of projecting from or retracting from the mold surface (surface) is used, each plate resistance element 10-1 shown in FIGS. 4 and 5 can be manufactured by one fifth press mold.

  FIG. 6 is a diagram showing plate resistance elements 10-2 to 10-5 whose resistance values are greatly changed by changing the number of the coarse resistance value adjusting groove portions 30. As shown in FIG. That is, the plate resistance element 10-2 shown in FIG. 6A is a plate resistance element 10-2 in which the coarse resistance value adjusting groove 30 is not provided (zero), and only the fine resistance value adjusting groove 40 is provided. 6B, the plate resistor element 10-3 shown in FIG. 6B includes a pair (two) of outermost coarse resistance value adjusting groove portions 30 and a fine resistance value adjusting groove portion 40. The plate resistance element 10-4 shown in FIG. 6C includes a pair (four) of the outermost rough resistance value adjusting groove 30 and the innermost rough resistance value adjusting groove 30. The plate resistance element 10-4 is provided with a fine resistance value adjusting groove 40, and the plate resistance element 10-5 shown in FIG. The pair of coarse resistance value adjusting groove portions 30 (four) are located in the middle. And a resistance value adjustment groove 30 only one is a plate resistance element 10-5 formed by providing a fine resistance adjustment groove 40. As described above, the resistance values can be easily varied greatly by changing the number (in some cases, the shape) of the coarse resistance value adjusting groove portions 30 provided in each of the plate resistance elements 10-1 to 10-5.

  Whether or not the coarse resistance value adjusting groove 30 is provided depends on whether or not the blades provided in the first to fourth press dies necessary for forming the respective coarse resistance value adjusting grooves 30 are the fifth press dies. As in the case of, it can be easily handled by protruding or retracting from the mold surface. That is, for example, when the plate resistance element 10-2 shown in FIG. 6A is manufactured, as shown in FIG. 7, the first to fourth press molds (not shown) are provided on the stages (1) to (4). Then, all the blades for forming the respective coarse resistance value adjusting groove portions 30 are retracted, and only the blades for forming the respective minute resistance value adjusting groove portions 40 are protruded, and the fine resistance value adjusting groove portions 40 are sequentially formed. I'll do it. Similarly, when the plate resistance element 10-3 shown in FIG. 6B is manufactured, as shown in FIG. 8, the stage (3), (4) is provided in the third and fourth press molds (not shown). In addition, it is only necessary to retract all the blades for forming the respective coarse resistance value adjusting groove portions 30 and project only the blades for forming the respective minute resistance value adjusting groove portions 40. Similarly, when the plate resistance element 10-4 shown in FIG. 6C is manufactured, as shown in FIG. 9, in the stage (3), each coarse resistance value adjustment provided in a third press die (not shown) is used. The blade for forming the groove 30 may be retracted, and only the blade for forming the fine resistance value adjusting groove 40 may be protruded. Similarly, when manufacturing the plate resistance element 10-5 shown in FIG. 6 (d), although not shown, for adjusting one of the coarse resistance values provided in the third mold (not shown) in the stage (3). The blade for forming the groove 30 may be retracted. In addition, in each plate resistance element 10-2 to 10-5 shown in FIG. 6, the state which connects each fine resistance value adjustment groove part 40 and the upper side 11 with a 5th press die is changed similarly to the said embodiment. Thus, it goes without saying that the plate resistance elements 10-2 to 10-5 whose resistance values are minutely changed are obtained.

  In each of the above-described embodiments, the feed hole 50 including a through hole is provided inside each of the plate resistance elements 10-1 to 10-5. For example, like the plate resistance element 10-6 illustrated in FIG. By providing the feed hole 50 on the line to be cut, the feed hole 50 is also cut when cut and individualized, and the feed hole 50 is cut into the plate resistance element 10-6 (outside periphery thereof). You may comprise so that it may provide in a notch shape.

  Further, in each of the above embodiments, the feed hole 50 is used as a part of the fine resistance value adjusting groove portion 40, so that the feed hole 50 is also used as the function of the fine resistance value adjusting groove portion 40. 50 may be used as the function of the coarse resistance value adjusting groove 30. Further, the feed hole 50 is provided in the plate resistance elements 10-1 to 10-5 (including the outer peripheral portion) independently without using the function of the coarse resistance value adjusting groove 30 and the fine resistance value adjusting groove 40. Also good. The position where the feed hole 50 is provided may be provided at any position instead of the center position of the plate resistance elements 10-1 to 10-5 as shown in the above embodiments.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. It should be noted that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in each of the above embodiments, the number of feed holes provided in the plate resistance element is one, but a plurality of feed holes may be provided. Each of the plate resistor elements is provided with two types of resistance value adjusting groove portions, that is, a coarse resistance value adjusting groove portion and a fine resistance value adjusting groove portion, but one or three or more types of resistance value adjusting groove portions may be provided. Good. Further, the groove portion is not linear, but may be other various shapes such as a curved shape. In short, any groove portion that penetrates in a strip shape may be used. In some cases, it is not necessary to attach a terminal to the plate resistor element, and it may be used for various purposes other than the fixed resistor housed in the ceramic case.

It is a front view of plate resistance element 10-1 with terminal 70. It is a front view of fixed resistor 100-1. It is manufacturing method explanatory drawing of the plate resistance element 10-1. It is a front view of plate resistance element 10-1. It is a figure which shows the plate resistance element 10-1 which changed the shape of the groove part 40 for fine resistance value adjustment. It is a figure which shows the plate resistance elements 10-2 to 10-5. It is manufacturing method explanatory drawing of the plate resistance element 10-2. It is manufacturing method explanatory drawing of the plate resistance element 10-3. It is manufacturing method explanatory drawing of the plate resistance element 10-4. It is manufacturing method explanatory drawing of the plate resistance element 10-6. It is a figure which shows an example of the plate resistance element 580 to which the terminal 600 was attached. It is a manufacturing method explanatory drawing of plate resistance element 580. It is a figure which shows an example of the plate resistance element 780 to which the terminal 800 was attached. It is an explanatory view of a manufacturing method of the plate resistance element 780.

Explanation of symbols

10-1 Plate resistance element 10A Element board 11 Upper side (outer periphery)
13 Lower side (outside)
14 Cutting line 15 Terminal connection portion 30 Coarse resistance adjustment groove (groove)
40 Fine resistance adjustment groove (groove)
50 Feed hole 70 Terminal 80 Case 100-1 Fixed resistor 10-2 to 10-6 Plate resistance element

Claims (3)

Each plate in the element plate to be sent while feeding holes are provided at predetermined intervals in an element plate formed by connecting a plurality of plate resistance elements in a strip shape, and the feed holes provided in this element plate are sequentially fed in the feeding direction. A groove portion forming step of sequentially forming a groove portion penetrating in a strip shape for resistance value adjustment in the portion of the resistance element;
A cutting step of sequentially taking out single plate resistor elements by cutting between adjacent plate resistor elements in which the groove portions are formed,
In the manufacturing method of the plate resistance element comprising:
The groove portion is formed so that its longitudinal direction is in a direction along the feed direction of the element plate, and the feed hole is formed in the plate resistor element. .   An end portion of the groove portion of the plate resistor element in the element plate is formed so as to protrude from one cutting line formed by the cutting, and the adjacent plate resistor element is cut by cutting by this one cutting line. 2. The plate resistance element manufacturing method according to claim 1, wherein a single plate resistance element having a groove portion cut out from the outer periphery is taken out by forming the outer periphery.   The groove portions formed in the plate resistor elements of the element plate are formed in a staggered manner in a plurality in parallel in a direction that is linear in the feed direction and orthogonal to the feed direction, so that each groove portion in adjacent plate resistor elements Are formed so as to protrude alternately from one cutting line, and by forming the outer periphery of adjacent plate resistance elements by cutting with this one cutting line, a pair of cutting lines are formed. The plate resistance element manufacturing method according to claim 1, wherein a single plate resistance element having grooves having shapes that are alternately cut from the outer periphery is taken out.

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