JP2011199070A - Holding tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding tool holding a plurality of compact components with high uniformity.SOLUTION: A holding tool 1 is equipped with: a substrate 5 having a support hole aggregation region 12 where a plurality of support holes 11 penetrating therethrough in the thickness direction are formed; and a tubular elastic member 7 arranged to be flush with the surface 13 of the support hole aggregation region 12 inside each of the support holes 11 and elastically holding a compact component inserted in the tubular elastic member.

Description

  The present invention relates to a holding jig, and more particularly to a holding jig that can hold a large number of small parts with high uniformity.

  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, as shown in FIG. 6, it is made of metal or the like, and has a rectangular portion having a frame portion 32a and a thin portion (not shown in FIG. 6) integrally formed inside the frame portion 32a. A rigid plate 32 having a shape, and an elastic material 33 having a holding hole 33a, which is made of rubber or the like provided so as to cover the upper and lower surfaces of the rigid plate 32 (not shown in FIG. 6) and the inside of the through hole. (See, for example, columns 0002 to 0004 of FIGS. 5 and 6 in Patent Document 1).

  By the way, when a small component member is press-fitted and held in the holding hole 33a of such a component holder 31, pressure may be applied to the elastic member 33 and the elastic member 33 may be deformed. When the elastic member 33 is deformed in this way, a large number of small component members cannot be held in a substantially uniform holding state, and the small component manufactured from the small component member using the component holder 1 can be prevented. Dimensional uniformity and shape uniformity are reduced. Further, if the elastic member 33 is deformed, the pressure when moving the small component member within the holding hole 33a and when pulling out the small component from the component holder 31 may be different and the workability may be inferior.

  Japanese Patent Application Laid-Open No. 2004-228688 describes “an electronic part holder for end coating that enables uniform coating” when a small part is coated with a conductive paste to form an external electrode. Specifically, the electronic component holder for end coating described in Patent Document 2 has “a large number of parallel through holes that are open on both sides of the plate, and the through holes are covered with elastic walls. In the electronic component holder for end coating for holding a small electronic part in the through hole by the elasticity of the elastic wall, the same as the above through hole is provided between the through holes of the elastic member constituting the elastic wall. A part of the elastic member does not exist and an elastically deformable void portion that does not hold the small electronic part is formed. ”(Claim 1 etc.)

  According to Patent Document 2, “in the peripheral portion of the plate 2, due to the surrounding frame body, the pressure of the elastic wall 5 loses the escape field, and the pressure concentrates in the central portion. As a result, the pressure is close to the central portion of the plate 2. The electronic part 7 inserted into the through hole 6 and the elastic wall 5 holding the electronic part 7 are subjected to a stronger pressure than the peripheral part, so that when the leveling is uniform, the end part of the electronic part 7 at the center part As described in the paragraph “[Problem to be Solved by the Invention]”, as described in the “protrusion dimension becomes larger than the peripheral part”, the idea of Patent Document 2 has a non-uniformity between the peripheral part and the central part of the plate. The purpose is to eliminate.

  However, when forming a small component from a small component member using a holding jig, not only in the holding state of the peripheral portion and the central portion of the plate, for example, in the central portion and also in the peripheral portion, The holding state of the small component member may become uneven. In particular, since small parts in recent years are required to have higher precision and higher uniformity, in order to meet this requirement, the holding state of a large number of parts for small parts held by the holding jig is applied to the entire holding jig. It has become important to make it even more uniform.

JP 09-022841 A No. 08-010181

  An object of the present invention is to provide a holding jig capable of holding a large number of small parts with high uniformity.

As means for solving the problems,
According to a first aspect of the present invention, there is provided a substrate having a support hole assembly region in which a large number of support holes penetrating in the thickness direction are formed, and arranged so as to be flush with the surface of the support hole assembly region inside each of the support holes. And a holding jig characterized by comprising a tubular elastic member that elastically holds a small part inserted in itself,
Claim 2 is the holding jig according to claim 1, wherein the outer peripheral surface of the tubular elastic member is in close contact with the entire inner peripheral surface of the support hole.
Claim 3 is the holding jig according to claim 1 or 2, wherein the tubular elastic member has an axis common to the axis of the support hole.
A fourth aspect of the present invention is the holding jig according to any one of the first to third aspects, wherein the number of the support holes is at least 4000.

  The holding jig according to the present invention is arranged to be flush with the surface of the support hole assembly region in each of the base having the support hole assembly region in which a large number of support holes are formed and the support holes. Since the tubular elastic member is provided, a large number of small parts can be independently held by the tubular elastic member, and the holding state of the small part held by a certain tubular elastic member holds the other small parts. It does not affect the deformation etc. Therefore, according to the present invention, it is possible to provide a holding jig capable of holding a large number of small parts with high uniformity.

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 top view showing a base body which is an embodiment of the base body constituting the holding jig according to the present invention. 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 plan view for explaining an example of a method for manufacturing a holding jig according to the present invention. FIG. 6 is a schematic perspective view showing an example of a conventional component holder.

  The holding jig according to the present invention includes a base having a support hole assembly region in which a large number of support holes penetrating in the thickness direction are formed, and the surface of the support hole assembly region is flush with the inside of each of the support holes. And a tubular elastic member that elastically holds a small component inserted in itself.

  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, a diameter in a plane perpendicular to the axis with an axis length of 1.0 to 3.2 mm or a diameter of a virtual circumscribed circle circumscribing a cross-sectional shape perpendicular to the axis. It has a dimension of 3 mm. Since the holding jig according to the present invention can hold small parts independently as will be described later, in this invention, the small size is further reduced from the above-mentioned dimensions in which the dimensional error of the small parts greatly affects the uniformity of the holding state. Parts can also be used.

  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 base 5 having a support hole assembly region 12 in which a large number of support holes 11 penetrating in the thickness direction are formed, and each of the support holes 11. A tubular elastic member 7 is disposed inside the support hole assembly region 12 so as to be flush with the surface 13 of the support hole assembly region 12 and elastically holds a small component inserted therein.

  As clearly shown in FIG. 2, the holding jig 1 includes a surface 13 of the support hole assembly region 12 in the base body 5, preferably both surfaces 13 and 13 of the support hole assembly region 12 and the tubular elastic member 7. It is essentially the same. In the present invention, it is particularly preferable that the term “level” is level with high precision, but it is only necessary that the level is substantially level in the present invention. For example, within the range where the object of the present invention can be achieved. Depending on the axial length of the small component to be held, the tubular elastic member 7 may protrude slightly from the surface 13 or may be recessed. Specifically, the protruding amount or the recessed amount of the tubular elastic member 7 with respect to the surface 13 may be 100 μm or less.

  Thus, when the surface 13 of the support hole assembly region 12 and the tubular elastic member 7 are flush with each other, as shown in FIGS. 1 and 2, both surfaces 13 of the support hole assembly region 12 in the base 5 and 13, that is, both surfaces 13 and 13 where the support holes 11 in the support hole assembly region 12 are not formed, and more specifically, portions other than the support holes 11 in the support hole assembly region 12 are exposed to the surface of the holding jig 1. Thus, both surfaces of the holding jig 1 are configured together with the tubular elastic member 7.

  As described above, when the surface 13 of the support hole assembly region 12 and the tubular elastic member 7 are flush with each other, for example, the deflection of the rubber against the holding jig described in FIG. Since this is small, there is an effect that a small part can be easily inserted.

  The support hole assembly region 12 is a region where a large number of support holes 11 are formed, and is a region where a large number of formed support holes 11 are aggregated. As shown in FIG. 3, the support hole assembly region 12 is a region surrounded by a plurality of support holes 11 arranged in the outermost row perforated in the base body 5, and as shown in FIG. 5 or a part of the substrate 5 may be used.

  As shown in FIG. 2, the base 5 functions as a reinforcing member that maintains the strength of the holding jig 1 and ensures its flatness. As shown in FIGS. 2 and 3, the base 5 has a flat plate shape having a rectangular support hole assembly region 12 in which a large number of support holes 11 are formed. Since this base | substrate 5 becomes a base of the holding jig 1, it is preferable that it has uniform thickness, for example, the thickness is set to 8.9-10.0 mm.

  The base 5 has a large number of support holes 11, for example, 4000 or more (in FIG. 3, a part of the support holes 11 is not shown). In the present invention, it can be made porous as described later. For example, when the holding jig 1 is made porous, at least 6000 support holes 11, preferably at least 7000 support holes 11 can be formed on the substrate 5. When a large number of support holes 11 are formed in the base body 5 in this way, productivity in the manufacturing method of small parts using the holding jig 1 is remarkably improved, and a large number of small parts with high uniformity are manufactured at once. it can.

  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 and the even rows along the first arrangement direction which is the short side direction of the base 5 illustrated in FIG. The second support holes 11B are arranged in the same manner. More specifically, the support holes 11 are arranged along the first arrangement direction and the second arrangement direction intersecting the first arrangement direction, in this example, the long side direction of the substrate 5 shown in FIG. 11A of 1st support holes, two 1st support holes 11A adjacent along the said 1st arrangement direction, and two 1st support holes adjacent to the said two support holes on the same side of the said 2nd arrangement direction The region surrounded by 11A is preferably composed of a second support hole 11B arranged at the center thereof. The first support holes 11A are arranged in the outermost row in the first arrangement direction, and the second support holes 11B are arranged in the outermost row in the second arrangement direction. In such a so-called “staggered” arrangement, the first holding holes 11 </ b> A located diagonally and the second support holes 11 </ b> B arranged therebetween have their axes on the same straight line, and these The angle between the straight line and each of the first arrangement direction and the second arrangement direction is about 45 °. When the support holes 11 are arranged in a so-called “staggered” manner as described above, the so-called “staggered” arrangement as described above may be, for example, a grid-like arrangement shown in FIG. 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. Therefore, in order to hold a larger number of small parts, the support holes 11 are preferably arranged in a so-called “staggered” manner.

  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, which are the axial distances between the support holes 11 adjacent to each other, are adjusted in consideration of the opening diameter of the support hole 11 and the like, for example, 1.8 to 5 Set within a range of 5 mm.

  The shape of the opening portion of the support hole 11 that opens to the surface of the base 5 and the cross-sectional shape when the support hole 11 is cut in a horizontal plane parallel to the base 5 are not particularly limited, and are, for example, circular, elliptical, rectangular A shape such as 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 of the support hole 11 is adjusted in consideration of the interval and the like, and is set within a range of 1.3 to 2.6 mm, for example.

  The dimensions of the base 5 are adjusted 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.

  As shown in FIGS. 1 and 2, the tubular elastic member 7 is disposed inside each support hole 11 and elastically holds a small part inserted into a through hole 15 formed therein. Therefore, a large number of the tubular elastic members 7, that is, the holding holes 15, are arranged in a so-called “staggered” manner like the support holes 11. Specifically, the holding holes 15 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 holdings 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.

  Each of the tubular elastic members 7 has an outer diameter that is substantially the same as or slightly larger than the diameter of the support hole 11, an inner diameter that is slightly smaller than the diameter of a small component, and an axial length that is substantially the same as the thickness of the base 5. And is formed into a tubular body in which a through hole 15 penetrating in the axial direction is formed. The opening diameter of the through hole 15 is usually set within a range of 70 to 90% with respect to the diameter of the small component. When this tubular elastic member 7 is disposed in the support hole 11, as clearly shown in FIG. 2, the end surface 16 of the tubular elastic member 7, preferably both end surfaces 16 and 16 are the surface of the support hole assembly region 12. 13 and the same level. Thus, the holding jig 1 is provided with an elastic member only in the support hole 11, particularly in the inner peripheral surface. Therefore, as shown in FIGS. 1 and 2, the tubular elastic member 7 forms a tubular body having a substantially uniform wall thickness having a through hole 15 that holds a small component, that is, a holding hole 15. In the holding jig 1, the tubular elastic member 7 has a substantially cylindrical shape, but may be, for example, an elliptical cylinder, a polygonal cylinder, or the like depending on the shape of the support hole 11.

  Such tubular elastic members 7 are arranged independently one by one inside the support hole 11, exist alone in the holding jig 1, and are not in contact with other tubular elastic members 7. When the tubular elastic member 7 is independently arranged inside the support hole 11 as described above, the small component can be independently held by the own through-hole 15 without being influenced by the other adjacent tubular elastic member 7. Therefore, even if the interval between the tubular elastic members 7 is narrow, the object of the present invention can be achieved well.

  The tubular elastic member 7 only needs to be disposed inside the support hole 11, and as shown in FIG. 2, the axis C common to the axis C of the support hole 11 in that the holding state of the small parts can be made more uniform. It is preferable that a predetermined holding state of the small component can be realized without uneven deformation of the tubular elastic member 7 when the small component is inserted, and the tubular elastic member 7 is detached from the support hole 11. It is preferable that the outer peripheral surface is in close contact with or adhered to the entire inner peripheral surface of the support hole 11 in that the above can be highly prevented. Examples of the predetermined holding state include a state in which the holding hole 15 is aligned with the axis of the small component.

  The tubular elastic member 7 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.

  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 support holes 11 and the holding holes 15 is different. That is, as shown in FIG. 4, the support holes 11 and the holding holes 15 in the holding jig 2 are arranged in a grid pattern aligned vertically and horizontally along the first arrangement direction and the second arrangement direction. Yes.

  For example, the holding jigs 1 and 2 are inserted into the holding hole 15 so that the axis of the small part is substantially parallel to the axis C of the holding hole 15, and preferably coincides with the holding hole 15. Hold it resiliently. 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 jigs 1 and 2 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.). As described above, when the small parts are held by the holding jigs 1 and 2, the tubular elastic member 7 is independent of the other tubular elastic members 7. For example, even if the dimensional accuracy of the small parts is low, other tubular elastic members A small component can be held without affecting the deformation of the member 7 and the like, and a large number of small components can be held so that the protruding amount of the small component from the tubular elastic member 7 becomes substantially uniform.

  A method for manufacturing a holding jig according to the present invention will be described. The holding jig according to the present invention can be manufactured by various methods. For example, it can be manufactured using a molding die 20 as shown in FIG. The molding die 20 includes a first die 21 and a second die 22, and a storage recess 25 in which the base body 5 can be stored is formed when these are overlaid. In the first mold 21, the same number of molding pins 23 are erected in the same arrangement as the support holes 11 so as to pass through the support holes 11 of the base 5 accommodated in the accommodation recess 25. For example, as shown in FIG. 5, the molding pins 23 are aligned so as to have an axis that coincides with the axis of the support hole 11 of the base 5 when the base 5 is accommodated in the molding die 20. The forming pin 23 has an axial length that matches the depth of the storage recess 25 and a diameter smaller than the diameter of the portion inserted into the holding hole 15 of the small component to be held.

  First, the base 5 is produced. The base body 5 cuts a plate-like body having a desired dimension from a plate body made of metal or resin that is equal to or thicker than its own thickness. A large number of support holes 11 are drilled in the support hole assembly region 12 of the plate-like body by grinding, cutting, file finishing or the like, and the substrate 5 is manufactured. For example, a primer, an adhesive, or the like is applied to the inner peripheral surface of the support hole 11 on the inner peripheral surface of the support hole 11 in order to improve the adhesion between the support hole 11 and the tubular elastic member 7. can do.

  Next, as shown in FIG. 5, the base body 5 is housed in the housing recess 25 of the molding die 20 so that the molding pins 23 pass through the support holes 11. When the base body 5 is stored in the storage recess 25, a cavity 24 defined by the molding die 20 and the base body 5 is formed in a portion where the tubular elastic member 7 is formed. Next, a liquid elastic material capable of forming the tubular elastic member 7 is injected into the cavity 24 from the injection port formed in the first mold 21 to form the tubular elastic member 7. The method for molding the elastic material is not particularly limited, and for example, a molding method such as compression molding, injection molding, transfer molding or the like 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. In this way, the holding jig according to the present invention can be manufactured.

  In addition to the above method, the holding jig according to the present invention is basically the same as the above method using, for example, the first mold 21 and the second mold 22 in which the molding pin 23 is not erected. Then, the elastic body can be formed in the support hole 11 and the elastic body can be drilled, and the base body 5 and the tubular elastic member 7 can be separately manufactured. 5 can also be produced by tightly adhering to or adhering to the support hole 11 perforated by 5. The tubular elastic member 7 can be produced by, for example, forming a tubular body by various forming methods such as extrusion molding and then cutting it to a predetermined axial length.

  The holding jigs 1 and 2 including the base body 5 and the tubular elastic member 7 can independently hold a large number of small parts by the tubular elastic member 7. The holding state does not affect the deformation or the like of the tubular elastic member 7 holding other small parts. Therefore, the holding jigs 1 and 2 can hold a large number of small parts in substantially the same holding state, for example, in a state where the protruding amount of the small parts from the holding holes 15 is substantially constant, that is, with high uniformity. Since a large number of small parts held by the holding jigs 1 and 2 are held with high uniformity in this way, when the holding jigs 1 and 2 are used when manufacturing the small parts, the dimensional uniformity and shape uniformity are achieved. A large number of small parts with high uniformity can be manufactured at once. Therefore, according to the present invention, it is possible to achieve the object of providing a holding jig capable of manufacturing a large number of highly uniform small parts at once.

  Further, the holding jigs 1 and 2 can also hold a large number of small parts in a holding posture in which the axis of the small parts and the axis of the holding hole 15 coincide with each other in addition to a state in which the protruding amount is substantially constant. Therefore, according to the present invention, it is possible to achieve the object of providing a holding jig capable of manufacturing a large number of highly uniform small parts at once.

  Further, as shown in FIGS. 1 and 2, the holding jigs 1 and 2 are made more porous than the conventional holding jig, that is, the holding holes 15 are made porous so that the interval between the holding holes 15 becomes narrow. Even when a large number of holding holes 15 are formed, each of these many small parts is independently held. Therefore, the holding jigs 1 and 2 can hold a large number of small parts in a substantially uniform holding state with high uniformity. Therefore, according to the present invention, it is possible to achieve the object of providing a holding jig capable of manufacturing a large number of small parts with high uniformity all at once with high productivity.

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

  For example, in the holding jigs 1 and 2, the support hole 11 has a flat inner peripheral surface and the tubular elastic member 7 has a flat outer peripheral surface. The surface and the outer peripheral surface of the tubular elastic member are preferably formed so as to be in close contact with each other. For example, even if an engagement protrusion and an engagement recess are formed so that the tubular elastic member does not fall out of the support hole. The opening of the support hole may have a tapered portion, and the tubular elastic member may have a bulging portion that is in close contact with the tapered portion.

  In the holding jigs 1 and 2, both surfaces 13 and 13 of the support hole assembly region 12 in the base 5 constitute both surfaces of the holding jigs 1 and 2 together with the tubular elastic member 7. In addition, both surfaces of the support hole assembly region of the base body, and further, protective layers formed of various kinds of fluororesins may be provided at both ends of the tubular elastic member.

  The base 5 of the holding jigs 1 and 2 is formed in a flat plate shape. In the present invention, however, the base is preferably a dam-like shape protruding in the thickness direction at least one of the edges of the plate-like body. You may have a collar part.

  As shown in FIGS. 1 to 3, the holding jig 1 has support holes and holding holes arranged in a so-called “staggered shape”, and the holding jig 2 has a support hole as shown in FIG. 4. In the present invention, the arrangement of the support holes and the holding holes is not particularly limited. For example, an inclined square arrangement obtained by rotating the grid-like arrangement 45 degrees, a regular six Examples include a honeycomb-like arrangement in which the squares are arranged in a close-packed manner, a concentric arrangement, and the like.

  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. In this invention, the first holding holes or the second holding holes are arranged in at least one outermost row or all the outermost rows in the first arrangement direction and the second arrangement direction. They may be arranged as follows. Specifically, the first holding holes may be arranged to be the outermost row in the second arrangement direction, and the second holding holes may be arranged to be the outermost row in the first arrangement direction, 6 may be the asymmetric staggered shape shown in FIG. 6 of Patent Document 2, or may be the outermost row symmetrical staggered shape shown in FIG. 7 of Patent Document 2. FIG. The reverse zigzag pattern shown may be used. In the present invention, the support holes are arranged in the same manner as the holding holes.

  In the so-called “staggered” arrangement of the holding jigs 1, the axes of the first holding holes 11 </ b> A located diagonally and the second support holes 11 </ b> B arranged therebetween are on the same straight line. The angle between the straight line and the first arrangement direction and the second arrangement direction is about 45 °. In this invention, the angles may be the same or different from each other. It can be set to 75 °. For example, if the angle is set to 60 °, the support holes and the holding holes can be arranged in a close-packed staggered pattern.

  The holding jigs 1 and 2 hold the support holes 11 along the first arrangement direction and the second arrangement direction at the same interval, and hold along the first arrangement direction and the second arrangement direction. Although the interval between the holes 15 is set to the same interval, in the present invention, the interval between the support holes along the first arrangement direction and the second arrangement direction may be set to different intervals, and the first arrangement direction. And the interval of the holding holes along the second arrangement direction may be set to a different interval.

  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 20, the molding pin 23 is erected on the first die 21. However, in the present invention, the molding pin may be erected on the second die. And it may be erected on the second mold. When the molding pin is erected on both the first mold and the second mold, the deformation of the reinforcing member is more effectively prevented when the holding jig is removed from the molding mold. be able to. The number of molding pins erected on the first mold and the second mold can be arbitrarily set. When molding pins are erected on both the first mold and the second mold, for example, the number of molding pins erected on the first mold and the molding pins erected on the second mold The ratio to the number 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 on both the first mold and the second mold, the molding pins adjacent along the first arrangement direction and the second arrangement direction are the first mold and the second mold. It may be set up arbitrarily or alternately on the mold.

Example 1
An aluminum plate having a thickness of 5.9 mm is cut into a length (also referred to as the short side direction) of 180 mm × width (also referred to as the long side direction) of 270 mm, and is opened in the rectangular support hole assembly region 12 having a length of 160 mm × width of 257 mm. The first support holes 11A are formed so that the circular support holes 11 having a diameter of 2.0 mm are spaced by 2.2 mm in the horizontal direction and 3.9 mm in the vertical direction in both the first support holes 11A and the second support holes 11B. 8650 holes were drilled so as to form a so-called “staggered” arrangement shown in FIG. 3, which was arranged in 39 rows and 110 columns and the second support holes 11B arranged in 40 rows and 109 columns. In this way, the substrate 5 shown in FIG. 3 was produced. After applying a primer to the inner peripheral surface of each drilled support hole 11, the base 5 is stored in the storage recess 25 of the molding die 20 so that the molding pin 23 having a diameter of 0.71 mm penetrates the support hole 11. did. Silicone rubber (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “KE-1950-50”) is injected into the cavity 24 formed by the molding die 20 and the base body 5 and heated at 120 ° C. for 10 minutes. Silicone rubber was integrally molded. Subsequently, the integrally molded body was removed from the molding die 20 to manufacture the holding jig 1 of Example 1 in which the support hole 11 and the tubular elastic member 7 share the axis C.

  The rubber elastic pieces described in JIS K6249 and JIS K6253 are respectively produced by similarly molding the silicone rubber forming the tubular elastic member 7 as the elongation, tensile strength and JIS A hardness of the tubular elastic member 7 when cut. And according to the said measuring method, the elongation at the time of a cutting | disconnection of a rubber test piece, tensile strength, and JISA hardness were measured, respectively. As a result, the elongation at break, tensile strength and JIS A hardness were all within the above ranges.

(Example 2)
As shown in FIG. 4, the support holes 11 were arranged except that a total of 7370 holes were drilled in a grid pattern of 110 rows and 67 columns at intervals of 2.3 mm in both the vertical and horizontal directions. A holding jig of Example 2 was manufactured basically in the same manner as Example 1.

(Comparative Example 1)
An aluminum plate having a thickness of 8.9 mm was cut into a length of 180 mm × width of 270 mm, and a rectangular area of length 160 mm × width 257 mm was cut from both surfaces to a depth of 1.5 mm, and a frame portion 32a around the periphery. A thin portion (not shown in FIG. 6) having a thickness of 5.9 mm was formed. In this thin wall portion, circular support holes (not shown in FIG. 6) having an opening diameter of 2.0 mm are arranged in 110 rows vertically in a grid pattern so as to have an interval of 2.3 mm in both the vertical and horizontal directions. A total of 7370 holes were drilled in 67 rows. In this way, a rigid plate 32 was produced. The rigid plate 32 was accommodated in the accommodating recess 25 of the molding die 20 so that the molding pin 23 having a diameter of 0.71 mm could penetrate the support hole. Silicone rubber (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “KE-1950-50”) is injected into the cavity formed by the molding die 20 and the rigid plate 32 and heated at 120 ° C. for 10 minutes. And silicone rubber were integrally molded. Next, the integrally molded body was removed from the molding die 20 to manufacture a conventional component holder 31 in which the holding hole 15 and the support hole share the axis.

(Evaluation of holding state)
Each of the holding jigs of Examples 1 and 2 and the component holder 31 of Comparative Example 1 is inserted into and held in the axial direction by a rectangular parallelepiped small component having an axial length of 1.6 mm and a diameter of 0.8 mm. The holding state of the parts was evaluated. The small parts were inserted into the support hole assembly region 12 of each holding jig or a plurality of holding holes 15 formed in the center and corners of the thin wall portion. When the amount of protrusion from the holding holes 15 of the plurality of held small parts was visually confirmed, both the holding jigs of Examples 1 and 2 protruded from the small parts compared to the part holder 31 of Comparative Example 1. The amount was almost constant and its uniformity was high.

DESCRIPTION OF SYMBOLS 1, 2 Holding jig 5 Base | substrate 7 Tubular elastic member 11 Support hole 12 Support hole gathering area | region 13 Surface 15 Through-hole (holding hole)
16 End face 20 Molding die 21 First die 22 Second die 23 Molding pin 24 Cavity 25 Storage recess

Claims (4)

A substrate having a support hole assembly region in which a large number of support holes penetrating in the thickness direction are formed;
A tubular elastic member is provided inside each of the support holes so as to be flush with the surface of the support hole assembly region, and elastically holds a small component inserted therein. Holding jig.   The holding jig according to claim 1, wherein an outer peripheral surface of the tubular elastic member is in close contact with the entire inner peripheral surface of the support hole.   The holding jig according to claim 1, wherein the tubular elastic member has an axis common to the axis of the support hole.   The holding jig according to any one of claims 1 to 3, wherein the number of support holes is at least 4000.

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