JP2011222889A - Holding jig and holding jig manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding jig which can manufacture with high productivity a number of small parts excellent in flatness and dimensional accuracy, and to provide a holding jig manufacturing method of manufacturing the holding jig.SOLUTION: A holding jig 1 comprises a reinforcement member 5 having a flat part 12 on which supporting holes 11 are formed to be arranged in a staggered manner and an elastic member 6 having holding holes 15. In the holding jig 1, the flat part 12 is embedded in the elastic member 6 so that the holding holes 15 pass through the inner part of the supporting holes 11. The flat part 12 is so configured that an area ratio (S/S) of the total opening area Sof the supporting holes 11 to the surface area Sof the supporting hole formation region is in the range of 0.40-0.70. A manufacturing method of the holding jig 1 comprises: a step of placing the reinforcement member 5 having the flat part 12 with supporting holes 11 and an area ratio (S/S) of 0.40-0.70 into a molding die such that molding pins penetrate through the supporting holes 11; and a step of injecting the elastic member into a cavity formed by the molding die and the reinforcement member 5 and molding the elastic member thus injected.

Description

  The present invention relates to a holding jig and a manufacturing method of the holding jig, and more specifically, a holding jig capable of manufacturing a large number of small parts having high flatness and excellent dimensional accuracy with high productivity, and manufacturing the holding jig. It is related with the manufacturing method of the holding jig which can be used.

  Integrated circuits and the like used in electronic devices such as computers, telephones, game machines, and automobile electrical devices are equipped with small components such as a multilayer ceramic chip capacitor (sometimes simply referred to as a chip capacitor). . When manufacturing such a small component, a holding jig in which a holding hole for holding a small component member or the like capable of manufacturing a small component is usually used. As such a holding jig, for example, Patent Document 1 discloses that “(a) a plate body having a large number of parallel through passages is provided. (B) The passage has an elastic wall and has a small electrical part. Can be positioned in the passage, and the dimension of the passage is smaller than the dimension of the corresponding part, and the part is elastically gripped at the position in the passage. A large number of electrical device for coating the ends of small electrical parts ”.

  In recent years, demand for small parts has increased, and it is desired to improve productivity in the production of small parts. As a method for realizing such a demand, there has been proposed a conventional holding jig, for example, a holding jig in which holding holes are formed at a higher density than the “coating apparatus” described in Patent Document 1. For example, in claim 2 of Patent Document 2, “a large number of holes penetrating in the thickness direction of a metal plate main body are formed by being regularly arranged vertically and horizontally in the plane of the plate main body. In the carrier plate in which a through hole is formed by forming an elastic wall with an elastic member made of silicone rubber on the inner wall surface of each hole, the through hole is one of vertical and horizontal intersections of vertical and horizontal array lines connecting the through holes. A carrier plate characterized in that it is arranged at every other intersection is described.

  Such a holding jig is manufactured using a molding die in which pins corresponding to the holding holes are erected. For example, as shown in FIG. 5, a molding die including a first die 31 having a first recess 42 in which a large number of molding pins 41 are erected and a second die 32 having a second recess 43. 30, a reinforcing member having a large number of support holes in the storage recess 33 formed by the first recess 42 and the second recess 43, so that the molding pin 41 penetrates the support hole, After being housed, it is manufactured by filling with an elastic material and molding (for example, refer to column 0004 of Patent Document 2).

Japanese Examined Patent Publication No. 62-20585 JP 2007-180356 A

  When manufacturing a holding jig using a molding die having a molding pin, when the holding jig in which the reinforcing member and the elastic material are integrally molded is released from the molding die, the elastic member and the molding are formed. Due to the pulling-out force of the forming pin due to the contact force with the pin, frictional force, etc., the reinforcing member, particularly the vicinity of the central portion thereof is deformed, and in some cases, the deformation may not be restored.

  In particular, like the carrier plate of Patent Document 2, when a large number of holding holes are formed in the holding jig, preferably at high density, in order to realize high productivity, the holding member in which the reinforcing member and the elastic material are integrally formed. When the tool is released from the molding die, the holding jig may be significantly deformed and the deformation may not be restored.

  The present invention provides a holding jig capable of manufacturing a large number of small parts having high flatness and excellent dimensional accuracy with high productivity, and a method for manufacturing the holding jig capable of manufacturing the holding jig. And aim.

As a first means for solving the above problems,
According to a first aspect of the present invention, there is provided a reinforcing member having a flat portion having a large number of support holes that are penetrated in the thickness direction and arranged in a staggered manner, a flange portion formed around the flat portion, and a small component. An elastic member having a plurality of holding holes for elastic holding, and the flat portion is embedded in the elastic member so that the holding hole passes through the inside of the support hole, the plateau area ratio of the surface area _{S a} of the support hole formation area total opening area _{S h} and the support hole is formed in said support hole _(S h / _{S a)} is at from 0.40 to 0.70 It is a holding jig characterized by being,
Claim 2 is the holding jig according to claim 1, wherein each of the support holes has an opening diameter of 1.3 to 2.6 mm.
Claim 3 is the holding jig according to claim 1 or 2, wherein the number of support holes is at least 4000 or more.
According to a fourth aspect of the present invention, in the holding jig according to any one of the first to third aspects, the holding hole has an axis common to the axis of the support hole.

As a second means for solving the above problems,
Claim 5 has a number of supporting holes arranged in a zigzag manner while penetrating in the thickness direction, the surface area S of the total opening area S _h and the supporting hole forming region in which the supporting hole is formed in the support hole _A reinforcing member having a flat portion having an area ratio (S _h / S _A ) with _A of 0.40 to 0.70 and a flange portion formed around the flat portion is erected in the storage recess. An elastic material is injected into a cavity formed by the molding die and the reinforcing member, and a housing step so that the molding pin penetrates the support hole in the housing recess of the molding die having a molded pin. And a method of manufacturing a holding jig, characterized by having a step of molding
According to a sixth aspect of the present invention, the molding die includes a first die and a second die, and the molding pin is erected on at least one of the first die and the second die. It is a manufacturing method of the holding jig of Claim 5.

In the present invention, since the flat portion of the reinforcing member has the area ratio (S _h / S _A ) of 0.40 to 0.70, the area ratio (S _h / S _A ) uses a reinforcing member having a flat portion of 0.40 to 0.70. Therefore, even if a large number of support holes are formed in a staggered arrangement in the flat portion in order to improve productivity, it is molded. When the holding jig is removed from the molding die, the reinforcing member, particularly the flat portion, is hardly deformed, and as a result, the flatness of the reinforcing member, particularly the flat portion, can be maintained at a high level. Therefore, according to the present invention, it is possible to provide a holding jig capable of manufacturing a large number of small parts with high flatness and excellent dimensional accuracy with high productivity, and despite having a large number of holding holes. The manufacturing method of the holding jig which can manufacture a flat holding jig can be provided.

FIG. 1 is a schematic top view showing a holding jig which is an embodiment of the holding jig according to the present invention. FIG. 2 is a schematic cross-sectional view showing a part of a cross section of the holding jig cut along line AA in FIG. FIG. 3 is a schematic view showing a reinforcing member which is an embodiment of the reinforcing member constituting the holding jig according to the present invention, and FIG. 3 (a) shows the reinforcing member constituting the holding jig according to the present invention. It is a schematic top view which shows the reinforcement member which is one Example, FIG.3 (b) is the partially expanded view explaining the arrangement | sequence of a support hole. FIG. 4 is a schematic top view showing a holding jig which is another embodiment of the holding jig according to the present invention. FIG. 5 is a schematic side view showing an example of a molding die used in the method for manufacturing a holding jig according to the present invention. FIG. 6 is a schematic cross-sectional view illustrating a state in which a reinforcing member is housed in an example of a molding die used in the method for manufacturing a holding jig according to the present invention.

  A holding jig according to the present invention includes a flat portion having a large number of support holes that penetrate in the thickness direction and are arranged in a staggered manner, and a reinforcing member having a flange portion formed around the flat portion. And an elastic member having a large number of holding holes for elastically holding small parts, and the flat portion is embedded in the elastic member so that the holding holes pass through the inside of the support hole. The holding jig according to the present invention can elastically hold the small component inserted into the holding hole by the elastic force of the elastic member.

  The small component held by the holding jig according to the present invention is a small component member that can be manufactured in a small component manufacturing process, a transport process, etc. , Members for small machine elements, members for small electronic components, and the like. In addition, since the manufacture of small parts includes a process of transporting small parts, the small parts include small parts themselves, for example, small appliances, small mechanical elements, and small electronic parts. Therefore, in the present invention, it is not necessary to clearly distinguish the small component from the small component member. As a small electronic component and a member for a small electronic component, for example, a finished product or an unfinished product such as a chip capacitor, an inductor chip, a resistor chip, etc., and / or, for example, a prism or cylinder, Examples thereof include a prismatic body or cylindrical body having ridges at one end, and a prismatic body or cylindrical body having heels at both ends. Such a small component has, for example, an axial length of 1.0 to 3.2 mm, a diameter in a plane perpendicular to the axis, or a diameter of a virtual circumscribed circle circumscribing a cross-sectional shape perpendicular to the axis. It has a dimension of 2.3 mm. As will be described later, since the overall flatness of the holding jig according to the present invention is very high, it is possible to use smaller small parts among the small parts having the above dimensions.

  The holding jig according to the present invention is suitable for holding the small component, for example, more preferably for holding a small component that needs to be coated with a conductive paste for electrode formation in at least two places.

  A holding jig 1 as an embodiment of the holding jig according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the holding jig 1 includes a flat portion 12 (not shown in FIG. 1) having a support hole 11 and a flange portion 13 formed around the flat portion 12. A reinforcing member 5 and an elastic member 6 having a holding hole 15, and the flat portion 12 is embedded in the elastic member 6 so that each of the holding holes 15 passes through each of the support holes 11. .

  As shown well in FIG. 2, the reinforcing member 5 includes the elastic member 6 so that the flat portion 12 in which the support hole 11 is formed is embedded in at least the elastic member 6 described later, and the elastic member 6 becomes flat. Support reinforcement. As shown in FIGS. 2 and 3, the reinforcing member 5 includes a rectangular flat portion 12 in which a large number of support holes 11 are formed, and a thickness direction, that is, an upper surface of the flat portion 12 around the flat portion 12. And a flange 13 protruding in the direction and the bottom surface direction. The flange portion 13 can also be referred to as a flange portion.

The flange portion 13 reinforces the strength of the holding jig 1 and the reinforcing member 5, but does not greatly affect the strength of the flat portion 12, particularly the central portion thereof. Therefore, even if the flange portion 13 is formed on the reinforcing member 5, the object of the present invention cannot be sufficiently achieved unless the flat portion 12 satisfies an area ratio (S _h / S _A ) described later. The reason is that, when the holding jig 1 is removed from the molding die, the deformation of the flat portion 12 in the vicinity of the flange portion 13 is restricted by the flange portion 13, but the deformation in the central portion of the flat portion 12 is deformed. Since there is no member that regulates this, and the reinforcing effect of the flange 13 is difficult to reach, the central portion is easily deformed. However, if the collar portion 13 is too large, the productivity and handleability of the holding jig 1 are greatly reduced, and therefore the width is preferably set to about 8 to 12 mm.

  The flange portion 13 is formed so as to surround the flat portion 12, and as shown in FIG. 2, the protrusion amount in the upper surface direction and the lower surface direction of the flat portion 12 is adjusted to be constant. In other words, as shown clearly in FIG. 3, the flange portion 13 forms a rectangular frame surrounding the flat portion 12, and the flat portion 12 is thinner than the flange portion 13 at a substantially central portion in the thickness direction. It is connected. The flange 13 has a high flatness, that is, a uniform thickness. Specifically, the thickness of the collar portion 13 is appropriately adjusted, and is set within a range of 8.9 to 10.0 mm, for example. The flatness calculated as follows of the collar part 13 is 0.15 mm or less, for example. The lower limit of the flatness of the flange 12 is ideally 0, but can be set to 0.03 mm, for example. The flatness of the collar 13 is determined as follows. First, for example, using any 20 points on the surface of the flange portion 13 of the reinforcing member 5 fixed to the stage as a measurement point, a CNC image measurement system “NEXIV series, manufactured by Nikon Corporation” or the like is used. Measure the height value from the stage surface. A minimum value and a maximum value are selected from the measured 20 height values, and a difference between the maximum value and the minimum value is obtained. This difference is defined as the flatness of the heel part 13.

  As shown in FIGS. 2 and 3, the flat portion 12 is a region where a large number of support holes 11 penetrating in the thickness direction are formed. The flat portion 12 has a constant thickness and high flatness. . The thickness of the flat portion 12 is preferably in the range of 5.9 to 7 mm, for example. The flat part 12 has a flatness calculated as follows, for example, 0.15 mm or less. The lower limit of the flatness of the flat portion 12 is ideally 0, but may be 0.03 mm, for example. The flatness of the flat portion 12 is determined as follows. First, for example, using any 30 points on the surface of the flat portion 12 of the reinforcing member 5 fixed to the stage as a measurement point, a CNC image measurement system “NEXIV series, manufactured by Nikon Corporation” or the like can be used. Measure the height value from the stage surface. A minimum value and a maximum value are selected from the measured 30 height values, and a difference between the maximum value and the minimum value is obtained. This difference is defined as the flatness of the flat portion 12.

As shown in FIG. 3, the flat portion 12 has a large number of support holes 11 formed over the entire area. As described above, the flat portion 12 satisfies the area ratio (S _h / S _A ) described later without providing a region where the support hole 11 for reinforcing its strength is not formed in the flat portion 12. The object of the present invention can be achieved well.

  The support holes 11 formed in the reinforcing member 5 have a large number, for example, 4000 or more, preferably at least 6000, more preferably at least 7000 support holes 11 penetrating in the thickness direction in the flat portion 12. It has at least 7,500, particularly preferably (a part of the support hole 11 is not shown in FIG. 3). When a large number of support holes 11 are formed in the reinforcing member 5, productivity in a method for manufacturing a small component using the holding jig 1 is improved.

  As shown in FIG. 3, the support holes 11 are arranged in a so-called “staggered” manner. Specifically, in this example, the support holes 11 include the first support holes 11A arranged in odd rows along the first arrangement direction which is the short side direction of the reinforcing member 5 illustrated in FIG. The second support holes 11B are arranged in rows. More specifically, as shown in FIG. 3 (b), the support holes 11 are provided in the first arrangement direction and the second arrangement direction intersecting the first arrangement direction, in this example, the reinforcement shown in FIG. The first support holes 11A arranged along the long side direction of the member 5, the axes 11a and 11b of the two first support holes 11A adjacent along the first arrangement direction, and the second arrangement direction A rectangular region formed by connecting the axes 11c and 11d of two first support holes 11A adjacent to the two support holes on the same side along the first arrangement direction and the second arrangement direction, preferably at the center thereof The second support holes 11B are arranged so that the axes 11e coincide. The first support holes 11A are arranged in the first row and the last row that are closest to the outermost row in the first arrangement direction, that is, both flanges 13 extending in the second arrangement direction, and the second arrangement direction. The second support holes 11B are arranged in the outermost row, that is, in the first row and the last row that are closest to the both flanges 13 extending in the first arrangement direction. In such a so-called “staggered” arrangement, the diagonal axes 11b and 11c and the axis 11e of the second support hole 11B arranged therebetween are on the same straight line L1, and this straight line L1. The angle between the first arrangement direction and the second arrangement direction is about 60 ° on one side and about 30 ° on the other side, and the axes 11a and 11d located diagonally and the second support holes arranged therebetween The axis 11e of 11B is on the same straight line L2, and one of the angles of the straight line L2 and the first and second arrangement directions is about 30 ° and the other is about 60 °. That is, in the right triangle formed by connecting the axes 11a, 11b and 11c and the right triangle formed by connecting the axes 11d, 11c and 11b, the inner angles are 90 °, 30 ° and 60 °.

When the support holes 11 are arranged in a so-called “staggered” manner as described above, the so-called “staggered” arrangement as described above can be applied to, for example, a grid-like arrangement in the same region. Since the support holes 11 can be formed in a larger number, that is, at a high density, the productivity of the holding jig 1 can be greatly improved. The holding jig 1 nevertheless has a flat portion 12 of the reinforcing member 5 that satisfies an area ratio (S _h / S _A ) described later. The flatness of the flat portion 12 can be maintained without substantial deformation of the reinforcing member 5, particularly the flat portion 12, when demolding.

The support holes 11 are arranged at regular intervals in both the first arrangement direction and the second arrangement direction. In each of the first support hole 11A and the second support hole 11B, the intervals that are the axial distances between the support holes 11 adjacent to each other are in the range where the area ratio (S _h / S _A ) described later is 0.40 to 0.70. The inner diameter is adjusted in consideration of the opening diameter of the support hole 11 and the like. For example, each of the intervals is set within a range of 1.8 to 5.5 mm so that the area ratio (S _h / S _A ) is within the range.

The shape of the opening portion of the support hole 11 that opens to the surface of the flat portion 12 and the cross-sectional shape when the support hole 11 is cut in a horizontal plane parallel to the flat portion 12 are not particularly limited, and are, for example, circular or elliptical. A shape such as a rectangle or a polygon can be arbitrarily selected. The shape of the opening and the cross-sectional shape are preferably the same. In this example, the support hole 11 has a circular shape with the same opening shape and the same cross-sectional shape, and has substantially the same diameter. The opening diameter, that is, the diameter of the support hole 11 is adjusted in consideration of the interval and the like so that an area ratio (S _h / S _A ) to be described later is within a range of 0.4 to 0.7. For example, the diameter of the support hole 11 is set within a range of 1.3 to 2.6 mm so that the area ratio (S _h / S _A ) is within the above range.

Flat portion of the reinforcing member 5 12 sum opening area _{S h} of the support hole 11, the area ratio of the surface area _{S A} of the support hole formation region 14A where a large number of the support hole 11 is formed _(S h / _{S A)} is 0.40 to 0.70. When the area ratio (S _h / S _A ) is less than 0.40, when the diameter of the support hole 11 is constant, the number of the support holes 11 to be formed is reduced, so that the holding jig 1 can be held. In some cases, the productivity of the holding jig 1 cannot be sufficiently improved due to a decrease in the number of small parts. On the other hand, when the area ratio (S _h / S _A ) exceeds 0.70, when the holding jig 1 is manufactured by a molding die, for example, the molded holding jig 1 is removed from the molding die. In this case, the reinforcing member 5, particularly the vicinity of the center of the flat portion 12, may be deformed and not restored due to the adhesion force, frictional force, or the like between the formed holding hole 15 and the forming pin. As a result, the holding jig 1 cannot maintain the flatness of the flat portion 12 and cannot manufacture a small component having excellent dimensional accuracy.

The area ratio (S _h / S _A ) is preferably 0.41 to 0.68, and particularly preferably 0.45 to 0.66. When the area ratio (S _h / S _A ) is within these ranges, when the holding jig 1 is manufactured by a molding die having a molding pin, for example, the molded holding jig 1 is molded into the molding die. The adhesion between the holding hole 15 and the forming pin when removed from the mold and the strength of the reinforcing member 5 can be balanced, and the holding jig 1 can be formed into a metal mold with almost no deformation of the reinforcing member 5. Can be removed from the mold. Further, when the area ratio (S _h / S _A ) is within the above range, it is difficult to deform even when a load is applied to the flat part 12 when the small part is inserted into or removed from the holding hole 15 and is retained after use. The jig 1 can maintain the initial high flatness.

The total opening area _Sh is the sum of the opening areas of the support holes 11. As shown in FIG. 3, the support hole forming region 14 </ b> A is formed by outer tangents T <b> 1 to T <b> 4 that are parallel to the first arrangement direction or the second arrangement direction and are in contact with the support holes 11 arranged in the outermost row. an enclosed area, the surface area S _a is the surface area on the assumption that the support porous region 14A into the supporting hole 11 is not formed. Therefore, the flat portion 12 includes the support hole forming region 14A and the support hole non-forming region 14B that surrounds the support hole forming region 14A and exists between the flange 13 and the support hole forming region 14A. Although the support hole non-forming region 14B reinforces the strength of the reinforcing member 5, it does not greatly affect the strength of the support hole forming region 14A, particularly in the vicinity of the central portion thereof. Accordingly, even if the support hole non-forming region 14B is formed in the reinforcing member 5, the object of the present invention cannot be sufficiently achieved unless the area ratio (S _h / S _A ) is satisfied. The reason is that when the holding jig 1 is removed from the molding die, the deformation of the support hole forming region 14A in the vicinity of the support hole non-forming region 14B is restricted by the support hole non-forming region 14B. The central portion of the support hole forming region 14A has no member that restricts its deformation, and the reinforcing effect of the support hole non-forming region 14B is difficult to reach. Therefore, the central portion is easily deformed.

In the present invention, the area ratio with or in place of _(S h / S _A), the area ratio of the surface area _{S P} output total opening area _{S h} and the flat portion 12 of the support hole 11 _(S h _/ S P) Is preferably 0.41 to 0.68. When the area ratio (S _h / S _P ) is within this range, a larger number of support holes 11 can be arranged in a staggered manner without reducing the strength of the flat portion 12. Here, the surface area S _P output the flat portion 12 is the sum surface area of the surface areas S _A and the supporting hole-free region 14B of the support hole formation region 14A.

  The reinforcing member 5 including the flat portion 12 and the flange portion 13 is formed in consideration of the productivity of small parts, the number of support holes 11 formed, the dimensions of the small parts, the strength of the holding jig 1, and the like. The dimension of the flat part 12 is adjusted.

  The reinforcing member 5 only needs to be formed of a material that can maintain the elastic member 6 in a flat shape, and examples of such a material include metals and resins. Specific examples of the metal include stainless steel, carbon steel, aluminum, aluminum alloy, and nickel alloy. Examples of the resin include polyester, polytetrafluoroethylene, polyimide, polyphenylene sulfide, polyamide, polycarbonate, polystyrene, and polypropylene. , Polyethylene and polyvinyl chloride. The reinforcing member 5 is preferably made of stainless steel, aluminum, an aluminum alloy, polyphenylene sulfide resin, or the like, and particularly preferably made of aluminum or an aluminum alloy, in that the object of the present invention can be satisfactorily achieved.

  As shown in FIGS. 1 and 2, the elastic member 6 has a plurality of holding holes 15, and has a gap that can accommodate the flat portion 12 therein. As shown in FIG. 2, the elastic member 6 embeds the flat portion 12 of the reinforcing member 5. In other words, the elastic member 6 covers both surfaces of the flat portion 12 and penetrates into the support holes 11 of the reinforcing member 5 to reinforce. It is formed so as to be flush with the flange 13 of the member 5. That is, the elastic member 6 is disposed on the surface of the flat portion 12 and is surrounded by the flange portion 13 of the reinforcing member 5. In this way, the elastic member 6 has two plate-like molded bodies disposed on both surfaces of the reinforcing member 5 integrally with each other through the columnar body partly penetrating into the support hole 11 of the reinforcing member 5. It is made up. Furthermore, the elastic member 6 includes a first plate-like molded body that covers one surface of the flat portion 12, a second plate-shaped molded body that covers the other surface of the flat portion 12, and a first plate-like shape. A columnar body that connects the molded body and the second plate-shaped molded body, and the columnar body has the same dimensions as the dimensions of the support hole 11. Here, the elastic member 6 has a flat portion 12 embedded so that the holding hole 15 passes through the inside of the support hole 11. Preferably, as shown in FIG. 2, the elastic member 6 embeds the flat portion 12 so that the holding hole 15 has an axis C common to the axis C of the support hole 11. When the elastic member 6 is formed in this manner, the adhesiveness between the elastic member 6 and the reinforcing member 5 is excellent, and insertion and extraction of small parts is facilitated.

  As shown in FIGS. 1 and 2, the elastic member 6 has a number of holding holes 15 penetrating in the thickness direction thereof and elastically holding small parts inserted or penetrated therein by its elastic force. Have. The elastic member 6 has a large number of holding holes 15, for example, 4000 or more, preferably at least 6000, more preferably at least 7000, particularly preferably at least 7500 (in FIG. The part is not shown.) When a large number of holding holes 15 are formed in the elastic member 6, productivity in a method for manufacturing a small part using the holding jig 1 is improved.

  The plurality of holding holes 15 are arranged in a so-called “staggered” manner along the first arrangement direction and the second arrangement direction basically in the same manner as the support holes 11. Specifically, the holding holes 11 include first holding holes 15A arranged in odd rows and second holding holes 15B arranged in even rows along the first arrangement direction. The first holding holes 15A are arranged in the first row and the last row that are closest to the outermost row in the first arrangement direction, that is, both flanges 13 extending in the second arrangement direction, and the second arrangement direction. The second holding holes 15B are arranged in the outermost row, that is, the first row and the last row that are closest to the both flanges 13 extending in the first arrangement direction. As described above, when the large number of holding holes 15 are arranged in a so-called “staggered shape” as described above, the productivity of the holding jig 1 can be greatly improved. The jig 1 is obtained.

  The holding holes 15 are arranged at regular intervals in both the first arrangement direction and the second arrangement direction. In each of the first holding hole 15 </ b> A and the second holding hole 15 </ b> B, each interval that is an axial distance between the holding holes 15 adjacent to each other is basically set to the same value as the interval of the support holes 11.

  The shape of the opening portion of the holding hole 15 opening on the surface of the elastic member 6 and the cross-sectional shape when the holding hole 15 is cut in a horizontal plane parallel to the elastic member 6 are not particularly limited. A shape such as a rectangle or a polygon can be arbitrarily selected. The shape of the opening and the cross-sectional shape are preferably the same. In this example, the shape of the opening and the cross-sectional shape are the same circle and have substantially the same diameter. The opening diameter of the holding hole 15 is adjusted so that the opening diameter is smaller than that of the support hole 11 in consideration of the size of the small component to be held. For example, the opening diameter, that is, the diameter of the holding hole 15 is set within a range of 80 to 90% with respect to the diameter of the small component or the diameter of the virtual circumscribed circle, for example, within a range of 0.4 to 2.1 mm Set to

  The elastic member 6 is adjusted in size and thickness so as to be flush with the flange 13 in consideration of the productivity of small parts, the size of the small parts, the elastic force exerted, and the like. That is, the thickness of the elastic member 6 (distance between both outer surfaces) is adjusted to the same thickness as the holding jig 1 and is usually adjusted to 8.9 to 10.0 mm.

  The elastic member 6 preferably has a predetermined elongation, tensile strength, and hardness so as to be elastically deformed and not damaged when a small part is inserted and / or removed. For example, the elongation at break (tensile speed 500 mm / min) specified in JIS K6249 is preferably 200 to 1000%, particularly preferably 400 to 900%, and the tensile strength (tensile specified in JIS K6249). The speed (500 mm / min) is preferably 5 to 15 MPa, particularly preferably 7 to 14 MPa, and the hardness (JIS A) defined in JIS K6253 is preferably 20 to 80, and 40 to 60 Is particularly preferred. The No. 3 dumbbell-shaped test piece was prepared in an environment of 23 ° C. and 50% humidity as defined in the above JIS K6249. Set to 20 mm.

  Since the holding jig 1 is used in the manufacturing method of a small part, for example, the electrode forming process of the member for a small part, the surface of the elastic member 6 realizes the homogeneity of the product. It is preferably smooth so that the conductive paste or the like does not adhere. In order to make the surface of the elastic member 6 a mirror surface, a method of molding the elastic member 6 using a mold having a mirror surface on the inner surface, a method of polishing or grinding the surface after molding in accordance with a conventional method, etc. can be selected. That's fine.

  The elastic member 6 is formed of a material that can be elastically deformed to insert and hold a small component. Examples of such a material include rubber and elastomer, and more specifically, silicone rubber. Among silicone rubbers, a silicone rubber obtained by crosslinking a linear polydimethylsiloxane having a high polymerization degree or a copolymer thereof to impart rubber elasticity, or an acid-resistant silicone rubber is preferable. As silicone rubber which bridge | crosslinked linear polydimethylsiloxane of high polymerization degree, a brand name "KE-1950-50" (made by Shin-Etsu Chemical Co., Ltd.) etc. can be obtained, for example.

The holding jig 1 has a high flatness, specifically, a flatness of 0.15 mm or less. Here, the flatness of the holding jig 1 is determined as follows. First, for example, the CNC image measurement system “NEXIV series, Inc., with 20 arbitrary points on the surface of the flange 13 of the holding jig 1 fixed to the stage and 30 arbitrary points on the surface of the elastic member 6 as measurement points. Using “Nikon” or the like, the height value of each measurement point from the stage surface is measured. The minimum value and the maximum value are selected from the total height of 50 points including the height value of 30 points of the obtained elastic member 6 and the height value of 20 points of the collar portion 13, and the maximum value and the minimum value are determined. Find the difference. This difference is defined as the flatness of the holding jig 1. When the holding jig 1 has a flatness within the above range, a large number of small parts can be held in the same state. In particular, the protrusion amount and the protrusion direction of the small parts protruding from the surface of the elastic member 6 are the same. It is uniform for almost all small parts. As a result, for example, electrodes having substantially the same size and shape can be formed on the protruding ends of almost all small components protruding from the surface of the elastic member 6, and a small component having uniform quality can be manufactured. it can. The lower limit of the flatness of the holding jig 1 is ideally 0, but practically, for example, 0.05 mm. The flatness of the holding jig 1 can be adjusted by adjusting the flatness of the flat portion 12 and / or by smoothing the surface of the elastic member 6, but the flatness of the holding jig 1 can be adjusted to a small value within the above range. Is particularly effective when the area ratio (S _h / S _A ) is 0.40 to 0.70.

  A holding jig 2 which is another embodiment of the holding jig according to the present invention will be described with reference to the drawings. As shown in FIG. 4, the holding jig 2 is basically the same as the holding jig 1 except that the arrangement of the holding holes 15, that is, the support holes 11 is different. As shown in FIG. 4, the holding holes 15 are arranged in a so-called “staggered shape” along the first arrangement direction and the second arrangement direction, and odd rows are arranged along the first arrangement direction. The first holding holes 15 </ b> A arranged in the first row and the second holding holes 15 </ b> B arranged in the even rows. The first holding holes 15A are arranged in both the outermost row in the first arrangement direction and the outermost row in the second arrangement direction.

  For example, the holding jigs 1 and 2 are inserted into the holding hole 15 in a state where the axis of the small part is substantially parallel to the axis of the holding hole 15, and preferably coincides with the holding hole 15, Hold on. And the holding jigs 1 and 2 holding the small parts are used for the manufacturing process, the conveying process, etc. of the small parts. In order to hold the small parts on the holding jigs 1 and 2, for example, an alignment plate in which the same number of through holes as the holding holes 15 are similarly arranged at the same intervals as the holding holes 15 is prepared. Are aligned on the holding jig 1 so that. Next, a small component is inserted into each of the through holes of the alignment plate, and the small component is uniformly pressed to the holding jig side with a flat plate-shaped member. Then, the small component is inserted into the holding hole 15 so as to be in the above state, and is held elastically. As an example of such a method, for example, in Japanese Patent No. 4337498, various conventional methods (for example, see columns 0004 to 0009 and FIGS. 9 to 14) and methods obtained by improving these various methods (claims) Range, and FIG. 1 and FIG. 2 etc.).

  By the way, in order to hold a large number of small parts in the holding hole 15 in such a manner as to be in a substantially similar state at once, the holding jigs 1 and 2 are placed on a plate-like member having a flat surface. Since the mounting is performed, not only the flatness of the elastic member 6 in the holding jigs 1 and 2 but also the flatness of the entire holding jig including the flange 13 is important. That is, even if the flatness of the elastic member 6 is high, if the flatness of the holding jig as a whole is low, the flatness of the holding jigs 1 and 2 is reduced when the holding jigs 1 and 2 are placed on the plate-like member. It will decline. However, the holding jigs 1 and 2 can maintain the high flatness of the reinforcing member 5 as will be described later, and since the overall flatness is high, a large number of small parts can be used even when used in the above method. It can hold | maintain at the holding hole 15 so that it may become a substantially the same state at once.

That is, in the holding jigs 1 and 2, since the flat portion 12 of the reinforcing member 5 has an area ratio (S _h / S _A ) in the above range, even if the reinforcing member 5 of the reinforcing member 5 is improved in productivity. Even if the support holes 11 are perforated in the flat portion 12 in a staggered arrangement, the strength of the flat portion 12 of the reinforcing member 5, particularly in the vicinity of the central portion thereof, is not greatly reduced, and the molded holding jigs 1 and 2 can be attached. When the mold is removed from the molding die, it is possible to substantially prevent deformation of the reinforcing member 5, particularly the flat portion 12 thereof. As a result, the holding jigs 1 and 2 can maintain the flatness of the reinforcing member 5, particularly the flat portion 12 before the elastic member 6 is molded, to a high level even after the elastic member 6 is molded and as a product. Furthermore, in order to realize the high flatness of the holding jigs 1 and 2, if the area ratio (S _h / S _A ) of the flat portion 12 is within the above range, the support hole 11 is formed in the flat portion 12. Therefore, the productivity of the holding jigs 1 and 2 is not greatly sacrificed. Therefore, although the holding jigs 1 and 2 have a large number of holding holes 15, a large number of small parts having high flatness and excellent dimensional accuracy can be manufactured with high productivity.

  In particular, even if the holding jigs 1 and 2 include the reinforcing member 5 in which the support holes 11 are formed with high density as described above, the reinforcing member 5, particularly the flat portion 12, is removed from the molding die. There is almost no deformation, and even if it is deformed, its degree is so small that it can be easily restored to its original state. Therefore, according to the present invention, despite having a large number of holding holes perforated at high density, high flatness in which deformation during manufacturing using a molding die having molding pins is suppressed. The object of providing a holding jig can be achieved.

  Since the holding jigs 1 and 2 are flat, a large number of small parts can be held in a uniform state. Therefore, according to the present invention, an object of providing a holding jig capable of manufacturing a large number of small parts having high dimensional accuracy with high productivity can be achieved.

The holding jig according to the present invention can be manufactured by using a molding die having a molding pin capable of forming a holding hole. For example and an example of a method for manufacturing a holding jig 1 and 2, has a large number of support holes 11 arranged in a zigzag manner while penetrating in the thickness direction, the total opening area S _h and numerous of the support hole 11 The flat portion 12 having an area ratio (S _h / S _A ) to the surface area S _{A of} the support hole forming region 14A in which the support holes 11 are formed is 0.40 to 0.70, and is formed around the flat portion 12. The reinforcing member 5 having the flange portion 13 is accommodated in the accommodating recess of the molding die having the molding pin erected in the accommodating recess so that the molding pin penetrates the support hole 11. And a method for manufacturing a holding jig, which includes a step and a step of injecting an elastic material into a cavity formed by the molding die and the reinforcing member 5. Hereinafter, taking the holding jig 1 as an example, an example of this manufacturing method (hereinafter sometimes referred to as one manufacturing method according to the present invention) will be described.

  In one manufacturing method according to the present invention, the reinforcing member 5 is prepared. For example, a plate-like body having a flat portion in which the support hole 11 is not formed from a plate body made of the above-described metal or resin that is the same as or thicker than the flange portion 13 and a flange portion 13 around the flat portion is desired. Cut it out. Or the flat part in which the support hole 11 is not formed, and the collar part 13 are produced separately, and a flat part and the collar part 13 are joined to desired positions by joining means, such as welding or adhesion | attachment, The said plate shape Create a body. A large number of support holes 11 having a predetermined shape and diameter are formed in the flat portion of the plate-like body thus manufactured along the first arrangement direction and the second arrangement direction by grinding, cutting, file finishing, or the like. Then, the reinforcing member 5 is manufactured by drilling so as to be arranged in a staggered pattern at predetermined intervals. Or the flat part 12 and the collar part 13 in which the support hole 11 was formed are produced separately, and the flat part or the flat part 12 and the collar part 13 are joined to a desired position by joining means such as welding or adhesion. Then, the reinforcing member 5 is produced. Note that an adhesive or a primer may be applied to the surface of the flat portion 12 in order to increase the adhesion with the elastic member 6.

  In one manufacturing method according to the present invention, a molding die is prepared. As shown in FIG. 5, the molding die 30 includes a first die 31 and a second die 32, and the first die 31 and the second die 32 are respectively a first recess 42 and a second recess. 43. A molding pin 41 is erected in the first recess 42. When the first mold 31 and the second mold 32 are overlapped, the storage recess 33 is formed by the first recess 42 and the second recess 43. The storage recess 33 is a recess for storing the reinforcing member 5, and defines a cavity 34 into which an elastic material forming the elastic member 6 is injected together with the reinforcing member 5. The inner surfaces of the first recess 42 and the second recess 43 may be mirror-finished.

  The molding pins 41 erected on the first mold 31 are arranged in the first arrangement direction and the second arrangement direction, that is, similarly to the holding holes 15. The first arrangement direction and the second arrangement direction are the same as the first arrangement direction and the second arrangement direction in the holding jig 1, respectively. For example, as shown in FIG. 6, the forming pins 41 are staggered so as to have an axis that coincides with the axis of the support hole 11 formed in the flat portion 12 when the reinforcing member 5 is accommodated in the molding die 30. It is arranged. The forming pin 41 has an axial length that matches the depth of the housing recess 33 and a diameter smaller than the diameter of the small component to be held or the diameter of the virtual circumscribed circle, specifically, substantially the same as the diameter of the holding hole 15. Diameter.

  In one manufacturing method according to the present invention, after preparing the reinforcing member 5 and the molding die 30 in this way, as shown in FIG. 6, the molding pins 41 are respectively placed in the storage recesses 33 of the molding die 30. The reinforcing member 5 is accommodated so as to penetrate each of the support holes 11. When the reinforcing member 5 is stored in the storage recess 33, a cavity 34 defined by the molding die 30 and the reinforcing member 5 is formed in a portion where the elastic member 6 is formed.

  In the manufacturing method according to the present invention, the elastic member 6 is then molded by injecting a liquid elastic material capable of forming the elastic member 6 into the cavity 34. The molding method of the elastic material is not particularly limited, and for example, a molding method such as compression molding, injection molding, or transfer molding can be employed. The molding temperature, molding time, and the like may be any temperature and time at which the elastic material to be used is cured, and can be arbitrarily adjusted according to the elastic material.

  When the molded elastic member 6 has a molding burr on its surface, surface treatment such as grinding may be performed to remove the molding burr. For example, the surface treatment includes surface grinding, milling, lapping and the like. Further, the surface of the elastic member 6 in the holding jig 1 can be mirror-finished. In addition, in order to ensure hardening of the elastic member 6 after shaping | molding of the elastic member 6, you may perform secondary heating or heat processing.

  In this way, the holding jig 1 is manufactured. The holding jig 2 can be manufactured in the same manner as in the manufacturing method according to the present invention.

  One manufacturing method according to the present invention is characterized in that the reinforcing member 5 that satisfies the above conditions is used. Therefore, the molded holding jig can be formed without greatly reducing the number of support holes 11 drilled in the reinforcing member 5. When the tools 1 and 2 are removed from the molding die 30, the deformation of the holding jigs 1 and 2, particularly the flat portion 12, is substantially changed by the adhesion force, frictional force, etc. between the formed holding hole 15 and the molding pin 41. Can be prevented. In particular, if the flat portion 12 satisfies the above condition, the molding pin 41 can be used only in the second recess 43 even if the molding pin 41 is erected only in the first recess 42. Even when the standing molding die is used, when the holding jigs 1 and 2 are removed from the molding die 30, the holding jigs 1 and 2 are hardly deformed. As a result, according to one manufacturing method according to the present invention, a large number of small parts having high flatness and excellent dimensional accuracy can be manufactured with high productivity despite having a large number of holding holes. Holding jigs 1 and 2 can be manufactured.

  The holding jig in the present invention is not limited to the above-described embodiments, and various modifications can be made as long as the object of the present invention can be achieved.

  In the holding jig 1, as shown in FIG. 1, the first holding holes 15A are arranged in the outermost row in the first arrangement direction, and the second holding holes 15B are arranged in the outermost row in the second arrangement direction. As shown in FIG. 4, in the holding jig 2, the first holding holes 15A are arranged in the outermost row in the first arrangement direction and the outermost row in the second arrangement direction. In the present invention, the first holding holes or the second holding holes are arranged so as to be at least one outermost row or all the outermost rows in the first arrangement direction and the second arrangement direction. It may be arranged. Specifically, the asymmetric staggered shape shown in FIG. 6 of Patent Document 2 or the outermost row symmetrical staggered shape shown in FIG. 7 of Patent Document 2 may be used. The reverse zigzag pattern shown in FIG. 8 may be used. In the present invention, the support holes are arranged in the same manner as the holding holes.

  In the holding jigs 1 and 2, the support holes 11 and the holding holes 15 are arranged between the diagonal axes 11b or 11a and 11c or 11d, as shown in FIGS. The straight lines connecting the axes 11e of the second support holes 11B are arranged in a so-called “staggered shape” that intersects the first arrangement direction and the second arrangement direction at about 30 ° and about 60 °, respectively. The arrangement of the support holes and the holding holes is such that the angle between the straight line connecting the axis line located diagonally and the axis line of the second support hole arranged therebetween intersects the first arrangement direction and the second arrangement direction, respectively. It is not specifically limited, It can set to arbitrary angles, for example, 15-75 degrees.

  The holding jigs 1 and 2 are set to have different intervals between the support holes 11 along the first arrangement direction and the second arrangement direction, and are held along the first arrangement direction and the second arrangement direction. Although the intervals of the holes 15 are set to different intervals, in this invention, the intervals of the support holes along the first arrangement direction and the second arrangement direction may be set to the same interval, and the first arrangement The interval between the holding holes along the direction and the second arrangement direction may be set to the same interval.

  In the holding jigs 1 and 2, as shown in FIG. 3, the reinforcing member 5 has a flange 13 formed around the flat portion 12. In this invention, the flange is the periphery of the flat portion. However, it may be formed at least at one edge of the flat portion.

  In the holding jigs 1 and 2, as shown in FIGS. 1 to 4, the support hole 11 is drilled in the same opening shape as the opening of the holding hole 15. May be perforated into an opening shape different from the opening of the holding hole. The support hole 11 does not need to have a circular opening, and can be arbitrarily selected from the various shapes described above as the shape of the opening.

  The manufacturing method of the holding jig according to the present invention is not limited to the above-described embodiment, and various modifications can be made within a range in which the object of the present invention can be achieved.

  In the molding die 30, the molding pin 41 stands upright in the first recess 42 of the first die 31. In the present invention, the molding pin stands upright in the second recess of the second die 31. Or may be provided upright in the first recess of the first mold and the second recess of the second mold. When the molding pin is erected in both the first recess and the second recess, the reinforcement member can be more effectively prevented from being deformed when the holding jig is removed from the molding die. Can do. The number of forming pins standing on the first recess and the second recess can be arbitrarily set. In the case where molding pins are erected in both the first recess and the second recess, for example, the number of molding pins erected in the first recess and the number of molding pins erected in the second recess The ratio can be set within the range of 10:90 to 90:10, and can also be set to 50:50. Further, when the molding pins are erected in both the first recess and the second recess, the molding pins adjacent along the first arrangement direction and the second arrangement direction are the first molds of the first mold. You may be standing arbitrarily or alternately by the recessed part and the 2nd recessed part of the 2nd metal mold | die.

(Example 1)
An aluminum plate having a thickness of 8.9 mm is cut into a length (also referred to as a short side direction) of 180 mm × a width (also referred to as a long side direction) of 270 mm, and a rectangular region of a length of 160 mm × width of 257 mm is removed from both surfaces. A plate-like body having a flat portion having a thickness of 5.9 mm and a flange portion 13 around it was produced by cutting a portion up to 1.5 mm. A circular support hole 11 having a diameter of 1.30 mm is formed in the flat support portion so that both the first support hole 11A and the second support hole 11B have an interval of 3.25 mm in the vertical direction and 1.87 mm in the horizontal direction. In addition, the first support holes 11A are arranged in 48 rows and 133 columns, and the second support holes 11B are arranged in 47 rows and 134 columns in a staggered arrangement as shown in FIG. 12682 holes were drilled. In this way, the reinforcing member 5 shown in FIG. 3 was produced. The center of the second support hole 11B substantially coincided with the center of the surrounding first support hole 11A.

  Next, a molding die 30 having a first die 31 and a second die 32 having the same dimensions with carbon steel S-50C was produced. As shown in FIG. 5, the first recess 42 and the second recess 43 are formed so that the storage recess 33 has the same dimensions as the reinforcing member 5. Formed in the first recess 42 are forming pins 41 arranged in a so-called “staggered” manner similar to the support holes 11. The forming pin 41 has an axial length of 8.9 mm corresponding to the depth of the storage recess 33 and a diameter of 0.4 mm smaller than the diameter or width of the portion inserted into the holding hole 15 of the small component to be held. Had. In this way, a molding die 30 was produced.

  Next, as shown in FIG. 6, the reinforcing member 5 was housed in the housing recess 33 of the molding die 30 so that the molding pin 41 penetrates the support hole 11. Silicone rubber (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “KE-1950-50”) is injected into the cavity 34 formed by the molding die 30 and the reinforcing member 5, and heated at 120 ° C. for 10 minutes. 5 and silicone rubber were integrally molded.

  Next, the first die 31 of the molding die 30 was separated from the second die 32 substantially vertically, the molding die 30 was opened, and the holding jig 1 was removed. In this way, a holding jig in which the holding hole 15 and the support hole 11 share the axis was manufactured.

  In addition, as the elongation, tensile strength, and JIS A hardness of the elastic member 6, the silicone rubber forming the elastic member 6 was similarly molded to prepare rubber test pieces described in JIS K6249 and JIS K6253, respectively. In accordance with the measurement method, the elongation at break, tensile strength and JIS A hardness of the rubber specimen were measured. As a result, elongation at break, tensile strength and JIS A hardness were 600%, 8.8 MPa and 49, respectively.

(Example 2)
A circular support hole 11 having a diameter of 2.00 mm is formed in the flat portion of the plate-like body, and the first support hole 11A and the second support hole 11B are both 3.95 mm in the vertical direction and 2.29 mm in the horizontal direction. The first support holes 11A are arranged in 40 rows and 109 columns, and the second support holes 11B are arranged in 39 rows and 110 columns so as to be spaced, so-called “staggered” shown in FIG. A reinforcing member 5 shown in FIG. 3 was produced basically in the same manner as in Example 1 except that 8650 perforations were made so as to form an array. Using this reinforcing member 5, a holding jig was manufactured in the same manner as in Example 1.

(Example 3)
A circular support hole 11 having a diameter of 2.60 mm is formed in the flat portion of the plate-like body, and the first support hole 11A and the second support hole 11B are both 5.28 mm in the vertical direction and 3.05 mm in the horizontal direction. The first support holes 11A are arranged in 30 rows and 81 columns and the second support holes 11B are arranged in 29 rows and 82 columns so as to be spaced from each other. A reinforcing member 5 shown in FIG. 3 was produced basically in the same manner as in Example 1 except that 4808 holes were drilled so as to form an array. Using this reinforcing member 5, a holding jig was manufactured in the same manner as in Example 1.

Example 4
A circular support hole 11 having a diameter of 2.20 mm is formed in the flat portion of the plate-like body with both the first support hole 11A and the second support hole 11B being 2.71 mm in the vertical direction and 4.70 mm in the horizontal direction. The first support holes 11A are arranged in 57 rows and 53 columns and the second support holes 11B are arranged in 56 rows and 54 columns so as to be spaced from each other. A reinforcing member 5 shown in FIG. 3 was produced basically in the same manner as in Example 1 except that 6045 holes were drilled so as to form an array. Using this reinforcing member 5, a holding jig was manufactured in the same manner as in Example 1.

(Example 5)
A circular support hole 11 having a diameter of 2.20 mm is formed in the flat portion of the plate-like body with both the first support hole 11A and the second support hole 11B being 2.71 mm in the vertical direction and 4.70 mm in the horizontal direction. The first support holes 11A are arranged in 57 rows and 53 columns and the second support holes 11B are arranged in 56 rows and 52 columns so as to be spaced from each other. A reinforcing member 5 shown in FIG. 4 was produced basically in the same manner as in Example 1 except that 5933 holes were drilled so as to form an array. Using this reinforcing member 5, a holding jig was manufactured in the same manner as in Example 1.

(Comparative Example 1)
A circular support hole 11 having a diameter of 2.60 mm is formed in the flat portion of the plate-like body, and both the first support hole 11A and the second support hole 11B are 5.00 mm in the vertical direction and 2.91 mm in the horizontal direction. The first support holes 11A are arranged in 31 rows and 84 columns and the second support holes 11B are arranged in 30 rows and 85 columns so as to be spaced, so-called “staggered” shown in FIG. A reinforcing member 5 shown in FIG. 3 was produced basically in the same manner as in Example 1 except that 5154 holes were drilled to form an array. Using this reinforcing member 5, a holding jig was manufactured in the same manner as in Example 1.

(Measurement of total opening area _Sh etc.)
In each reinforcing member 5 of the holding jig manufactured in Examples 1 to 5 and Comparative Example 1, the total opening area S _h of the support holes 11, the surface area S _p of the flat portion 12, the surface area S _A of the support hole forming region 14 </ b> _A , Table 1 shows the results of calculating the area ratio (S _h / S _A ) and area ratio (S _h / S _p ), and the results of measuring the flatness of the flat portion 12 and the flange portion 13 according to the above method.

(Measurement of flatness of holding jig)
Table 1 shows the results of measuring the flatness of the holding jigs manufactured in Examples 1 to 5 and Comparative Example 1 according to the above method. In addition, when the flatness of the elastic member in each holding jig was measured, all were 0.08 mm or less.

As shown in Table 1, each of the holding jigs of Examples 1 to 5 includes a reinforcing member that satisfies the area ratio (S _h / S _A ), and all have high flatness. I understood it.

DESCRIPTION OF SYMBOLS 1, 2 Holding jig 5 Reinforcement member 6 Elastic member 11 Support hole 11A 1st support hole 11B 2nd support hole 11a, 11b, 11c, 11d, 11e Axis 12 Flat part 13 ridge part 14A Support hole formation area 14B No support hole Forming region 15 Holding hole 15A First holding hole 15B Second holding hole 30 Molding die 31 First die 32 Second die 33 Storage recess 34 Cavity 41 Molding pin 42 First recess 43 Second recesses L1, L2 Straight line T1 , T2, T3, T4 Tangent

Claims (6)

Reinforcing member having a flat portion having a large number of support holes arranged in a staggered manner and penetrating in the thickness direction, and a flange portion formed around the flat portion, and a small component are elastically held. An elastic member having a plurality of holding holes, wherein the flat portion is embedded in the elastic member so that the holding hole passes through the inside of the support hole,
The plateau area ratio of the surface area _{S A} of the support hole formation area total opening area _{S h} and the support hole is formed in said support hole _(S h / _{S A)} is at from 0.40 to 0.70 A holding jig characterized by being.   The holding jig according to claim 1, wherein each of the support holes has an opening diameter of 1.3 to 2.6 mm.   The holding jig according to claim 1 or 2, wherein the number of the support holes is at least 4000 or more.   The holding jig according to claim 1, wherein the holding hole has an axis common to the axis of the support hole. Has a large number of supporting holes arranged in a zigzag manner while penetrating in the thickness direction, the area ratio of the surface area S _A of the support hole formation area total opening area S _h and the support hole is formed in the support hole _A reinforcing pin having a flat portion (S _h / S _A ) of 0.40 to 0.70 and a flange portion formed around the flat portion is formed with a molding pin erected in the housing concave portion. Storing the molding pin so that the molding pin penetrates the support hole in the storage recess of the molding die having;
And a step of injecting and molding an elastic material into a cavity formed by the molding die and the reinforcing member. The mold is composed of a first mold and a second mold,
The method for manufacturing a holding jig according to claim 5, wherein the forming pin is erected on at least one of the first mold and the second mold.

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