WO2003009662A1 - Board carrier - Google Patents

Abstract

A board carrier for carrying printed wiring boards each mounting electronic components from one position to another position collectively. A supporting frame (10) is assembled by supporting rods (10b) such that six faces of a regular cube define open faces (10a1-10a6). Between an upper supporting rod (10b1U) and a lower supporting rod (10b1B) defining one open face, a pair of carrying plates (11, 12) in facing attitude are secured semi-fixedly to arbitrary positions on the supporting rods through sliding adjustment on these supporting rods. Between the pair of carrying plates, a plurality of boards (2) in horizontal attitude are locked at the opposite sides (2c, 2d) thereof by horizontal locking grooves (11b, 12b) etched in the carrying planes (11a, 12a) and carried in multi-stage in the vertical direction. A mechanism (13) for carrying the supporting frame itself movably relative to the floor face (FL) is fixed to a lower part of the lower supporting rod.

Description

Technical field

 The present invention relates to a printed wiring board (hereinafter referred to as a board) on which electronic components are mounted from one point on a manufacturing line of an electronic device or the like to another part, and further, from another manufacturing line to another manufacturing line. When transporting to a production facility, a large number of substrates are collectively carried

Related to a substrate transport device that transports substrates along the floor surface, and in particular, increases the base loading density, facilitates the transfer of substrates while maintaining the high loading status, and The present invention relates to an improvement in a substrate transfer device that facilitates access from various aspects of the operation of a substrate, and can continuously cope with a difference in a width dimension for each type of substrate to be integrated and carried. . Background art

 As shown in FIG. 5, a conventional substrate transfer device of this type includes a plurality of locking grooves 1a formed on the upper surface of a rectangular flat support plate 1 and substantially parallel to a short side of the support plate. Are arranged so as to divide the long side of the support plate, and for each locking groove la, or for each of a plurality of locking grooves la according to the need of mounting width dimensions, the bottom of the substrate 2 By inserting the force 2a into one side 2a, a plurality of substrates are supported collectively in a posture leaning on the support plate 1a at intervals of the locking groove 1a, and 1 Integral with 1a, a worker who hooks and holds the appropriate hook hole 3 transfers it from one point on the production line to another point, and then to another production line or other production facility. It was something to be done.

However, in such a substrate transfer apparatus of the background art, when a plurality of carrier plates 1 are stacked at an appropriate accumulation location, the shape of the carrier plates 1 and the shape of the substrates 2 on different carrier plates 1 are different. Blocked by interference, the integrated carrying density of the substrate itself is kept low. Since it must be returned and transported, it is generally inefficient not only in terms of work space in terms of bulkiness of the two groups of integrated and loaded substrates, but also in terms of working time in terms of small-edge transport. There was a problem.

In addition, when the operator inserts and removes the two groups of substrates from the two groups of substrates stacked and supported on the supporting plate 1, the operator accesses the supporting plate 1 from the upper surface of the supporting plate 1. In addition, for a large difference in the width of each type of substrate to be integrated and supported, a plurality of types of support plates 1 having different widths are prepared, and the width of the Since it must be dealt with by selectively using the type of support plate 1 corresponding to the stepwise classification, the usability is poor in terms of access only from the top surface, and in terms of the selective use of the type of support plate 1, Setup force S It was complicated, and there was also a problem that work was generally difficult. Disclosure of the invention

 In view of the above, it is an object of the present invention to provide a substrate transfer device which solves such problems and is efficient in terms of work space and work time, and is easy to work on in terms of access to the support plate and setup of the support plate. The object of the invention described in claims 1 to 4 is as follows.

In order to solve such a problem, the inventions according to claims 1 to 4 have been made in consideration of the problems of inefficiency of work space and work time and difficulty of work in the device of the background art, and Specifically, the position of a plurality of carrier plates is slidably adjusted on a support rod in a support frame assembled with support rods extending along the ridge line of each surface of a cube of 6 mm. Fixing, supporting a large number of substrates in a horizontal position in multiple stages in a vertical direction between a pair of support plates, and supporting the support frame itself so as to be relatively movable with respect to the floor surface. Increasing the loading density, facilitating the transfer of substrates while maintaining the high integration density, facilitating access to the loaded and loaded substrates from various directions, and for each type of substrate to be loaded and loaded Board transfer device with improved structure that can continuously deal with differences in width It is intended to provide. Therefore, the following claims 1 to 4 are claimed. As shown in FIG. 1, the structure of the invention according to claim 1 is such that the support frame 10 is formed along the ridge line of each surface of the polyhedron so that each surface of the polyhedron is defined as an open surface. Assembled with the extending support rod 1 Ob, the first support plate 1 1 force s, substantially horizontal so as to lock one side of the substrate 2 in a substantially horizontal posture as a supported body It is provided with a first support surface 11a in which the engraved locking grooves 1.1b are arranged in multiple stages in the vertical direction, and a second support plate 12tfi, substantially as a supported member. A substantially horizontal locking groove 12b is provided in multiple stages in the vertical direction so as to lock the other side opposite to the above one side of the substrate 2 in the horizontal posture. 2, the first upper engaging member 20 is disposed on the first supporting plate 11 and substantially horizontally in the supporting frame 10. At least one upper support extending The first lower engaging member 23 is slidably engaged with the rod 1 Ob 1 U in the longitudinal direction, and the first lower engaging member 23 is disposed on the first support plate 11 and the support frame Engages at least one lower support rod 10b IB extending substantially horizontally below the upper support rod 1Ob1U in the body 10 so as to be slidable in the longitudinal direction. A second upper engaging member 14 is provided on the second support plate 12, and is disposed in a longitudinal direction with respect to the upper support rod 10 b 1 U in the support frame 10. The second lower engaging member 15 is slidably engaged with the second support plate 12, and the lower support rod 10 b 1 in the support frame 10 is disposed on the second support plate 12. B is slidably engaged in the longitudinal direction with respect to B, and the support frame support mechanism 13 supports the support frame 10 so as to be relatively movable with respect to the floor surface. The first support surface 11a of the first support plate 11 and the second support The second support surface 12 a of the plate 12 is arranged to face the second support surface 11 a, and the substrate 2 as a supported member is supported between the first and second support surfaces 11 a and 12 a. Act on. According to a second aspect of the present invention, the support frame 10 in which the caster 13a is disposed on the support rod 1Ob itself functions as a support frame support mechanism 13; The entire body 10 acts so as to be movable relative to the floor.

As shown in FIG. 3, in the configuration of the invention according to claim 3, the third support plate 17 further includes a third support surface 17a, and the third support plate 17a The substrate 2 is provided integrally on the back surface of the second supporting surface 12 a and has a substantially horizontal posture as a supported member. Locking grooves 1 Ίb, which are engraved substantially horizontally, are provided in multiple stages in the vertical direction so as to lock one side of the second support plate. It is the same structure as the support plate 17 * It has the same structure, and is disposed on the third support plate 17 for the third upper engagement tool 21 1 s, and the support frame 10 It is slidably engaged with the upper support rod 1 O b 1 U in the longitudinal direction, and is disposed on the third support plate 17, the third lower engagement member 24 force s ′. Slidably engages with the lower support rod 1 Ob 1 B in the support frame! _ 0 in the longitudinal direction, the fourth upper engagement tool 22 force s, the fourth The fourth lower engaging member, which is disposed on the supporting plate 18 and slidably engages with the upper supporting rod 1 Ob 1 U in the supporting frame 10 in the longitudinal direction, is provided. 25 is disposed on the fourth support plate 18, and the support frame 10 And slidably engages in the longitudinal direction with respect to the support rods 1.0b1B, whereby the third support surface 17a of the third support plate 17 and the fourth support The fourth supporting surface 18a of the supporting plate 18 is disposed so as to be opposed to the third supporting surface 18a, and the substrate 2 as a supported member is also provided between the third and fourth supporting surfaces 17a and 18a. It acts to carry

 As shown in FIG. 2, the structure of the invention according to claim 4 is that the upper engagement member restriction 瑋 16 and the second upper engagement member i4 on the upper support rod 1Ob1U. In this case, the second support plate 12 is easily and detachably and resiliently locked to the upper support bar on the opposite side of the second support surface 12a near the fixed portion. The upper engaging member restricting member 璟 16 Force is applied to the upper engaging member 14 or the supporting plate 12 itself at that portion, and

The upper support rod 1Ob1U of the second plate 12 acts to regulate the sliding along the longitudinal direction. '' Brief description of the drawings

1 to 4 relate to the present invention.

FIG. 1 is a perspective view of a substrate transfer device including a pair of support frames 10.

FIG. 2 is a perspective view extracting and showing the upper engaging member 14 and the upper engaging member restrictor 16. FIG. 3 shows an embodiment including a third support plate 17 and a fourth support plate 18. FIG. 3 is a perspective view of the substrate transfer device.

FIG. 4 is a perspective view of the substrate transfer device in the embodiment including the support frame 10 having a regular pentagonal cross section when projected on a plane.

FIG. 5 relates to the background art, and is a perspective view of a conventional substrate transfer device. BEST MODE FOR CARRYING OUT THE INVENTION

The best mode for carrying out the present invention will be described below with reference to FIGS. The support frame 10 is, for example, one of the hexahedrons.'The six open faces 10a1, 10a2, 10a3, 10a4, 10a5, corresponding to the six faces of the psychomouth-shaped cube, It is assembled with support rods 10b made of aluminum or resin material extending along the ridges of the six surfaces so as to define 10a6. By the support rod 1 Ob extending along the upper ridge line of the four open surfaces 0 a, 10 a2, 10 a3, 10 a 4 facing the horizontal direction of the support rod 10 b, the upper support rod 1 Ob 1 U, 10b 2U, 10b3U, and 10b4U are configured. Similarly, the lower support rod 1 Ob 1 B is formed by the support rod 10 b extending along the lower ridges of the four open surfaces 10 a 1, 10 a2, 10 a3, and 10 a4 of the support rod 10 b. , 10b2B, 10b3B, and 10b4B. Any of the upper support rods 10b1U, 10b2U, 10b3U, 10b4U, e.g., 1 Ob iU and the lower support rods 10blB, 10b2B, 10b3B, 10b4B Arbitrary, for example, in a vertical position bridging between 10b 1B, a pair of second support plates 11, 12 forces ⁵ ', loaded and upper support rods 1 O b 1U And the lower support rod 1Ob1B is slidable along the longitudinal direction and can be fixed at any position in the longitudinal direction. The first support surface 11a provided on the first support plate 11 so as to face the second support plate 12 includes an upper support rod 10b1U and a lower support rod 10b1B. A plurality of locking grooves 11b, which are formed so as to extend substantially horizontally in a depth direction orthogonal to the longitudinal direction, are arranged in multiple stages in the vertical direction. On the other hand, a second support surface 12a provided on the second support plate 12 so as to face the first support plate 11 has an upper support rod 10b. l and a plurality of locking grooves 1 2b that are engraved so as to extend substantially horizontally in the depth direction perpendicular to the longitudinal direction of the lower support rod 10b 1B are provided in multiple stages in the vertical direction, The locking grooves 12b are horizontally opposed to the plurality of locking grooves 11b on the first holding surface 11a of the first holding plate 11 facing each other. In this case, regarding the positions of the first and second support plates '11, 12 on the upper support rod 10b1U and the lower support rod 1Ob1B, the two support plates 11, 12 are In the longitudinal direction of the rod, the locking groove on the first supporting surface 11a of the first supporting plate i1 is separated from each other by the approximate width of the substrate 2 as the supported member. At 1 1 b, one side 2 c of the substrate 2 in a substantially horizontal posture is locked by the force ⁵ , and at the same time, the lock opposing the locking lb on the second support surface 12 a of the second support plate 12. The sliding groove is adjusted on the support rod so that the other opposite side 2 d of the substrate 2 is locked by the stop groove 12 b. By such sliding adjustment of the first and second support plates 11 and 12, while continuously coping with the difference in the width dimension of each type of the substrate 2 as the supported member, The substrate 2 can be supported between the two supporting plates 11 and 12. The loading positions of the first and second support plates 11 and 12 on the support frame 10 are on the open surface 10a1 and the upper and lower support rods 10b1U and 1Ob1 along the lower ridges. It is not limited to between B, the upper surface along the upper and lower ridges of the open surface 10a2 ♦ The lower support rods 10b 2U, 1 Ob 2B It may be between B and the open surface 10a3 The upper and lower support rods along the lower ridge line may be between 10 b 3 U and 10 b 3 B, or the upper and lower support rods along the upper and lower ridge lines of open surface 10 a 4 It may be between 10b4U and 10b4B. From any of these four open surfaces 10a1, 10a2, 10a3, and '10a4, which are arranged facing the entire circumference around the vertical center axis of the support frame 10, the first Work access to the substrate 2 between the second support plates 11 and 12 is easy. In this case, for example, looking at the first and second support plates 11 1 and 12 loaded on one open surface 10 a 1, the first and second support surfaces 11 a and 12 a In the above, one or more opposing sides 2 of one or more substrates 2 are provided for one or more pairs of locking grooves 1 1b and 12b, each of which is horizontally opposed to each other. c and 2 d move from the outside of the open surface 10 a 1 Open surface. It is engaged so as to be pushed through through 10 a 1 and is locked there, or conversely, from the locking grooves ll-b and 12 b, both opposing sides of the substrate 2 2c, 2d force The outer surface of the open surface 10a1 is removed so as to be pulled out through the open surface 10a1 and is unlocked there. .

An appropriate support frame support mechanism 13 is provided between the support frame 10 and the floor surface FL, and the support frame support mechanism is located at a height from the floor surface FL suitable for work. In addition to supporting the support frame 10, the entire structure of the substrate transfer device, including the support frame 10, the first and second support plates 11, 12, and the substrate 2, is placed on the floor FL. On the other hand, it is movably supported. With the support frame support mechanism 13, the entire structure of the substrate transfer device travels along the floor FL using the manual pushing of an operator or the propulsion of an appropriate drive power source, thereby producing a production line. It can be transported from one location above to another, or even to another production line or other production facility. In this case, for example, as shown in the configuration of FIG. 1, the structure itself equivalent to the support frame 10, typically, casters 13 as rolling mechanisms are provided at the lower four corners of the support rod 10 Ob. The support frame supporting mechanism 13 to which a is attached may be used. Naturally, it is possible to load a plurality of support plates from the outside on the four open surfaces around the vertical center axis of the support frame in the support frame support mechanism 13 here. it can.

Proceeding to FIG. 2, the top surface 12 c of the support plate 12 illustrated in FIG. 1 engages with the upper support rod 10 b 1 U of the support frame 10 slidably in the longitudinal direction. An upper engaging member 14 is provided. The upper engagement member 14 is made of a metal or resin block-like member 14a, and the bottom flange portion 14b is attached to the top surface 12G by an appropriate fastening means such as a tap screw. By being tightened, it is fixed on the top surface 12c. An engagement hole 14c is formed in the center of the upper engagement member 14, and the upper support rod 10b1U force s' is inserted into the engagement hole 14c. Then, the upper engaging tool engages with the upper support rod 10b1U, whereby the entire support plate 12 is positioned at an arbitrary position in the longitudinal direction on the upper support rod 1Ob1U. Sliding adjustment becomes possible. Although not shown in the figure, naturally, the lower engaging member 15 having the same structure as the above-described upper engaging member 14 is also provided on the bottom surface of the support plate 12. This allows the entire support plate 12 to be slidably adjusted to any position in the longitudinal direction even on the lower support rod 1 Ob 1 B. Although the second support plate 12 has been illustratively extracted and described above, not only the above-described first support plate 11 but also the third and fourth plates described later. The top and bottom surfaces of all the support plates loaded in the support frame 10 here, including the support plates 17 and 18 of the above, have upper engaging tools 20, 21 and 21 of the same structure. 22 and the lower engaging members 23, 24, 25 are arranged in the order described.

As further shown in FIG. 2, in the upper support rod 10 b 1 U, the second support plate 12 near the portion where the upper engagement tool 14 of the second support plate 12 is engaged An upper engaging member regulation 璟 16 is provided which is easily and detachably locked to the support rod 10b1U on the opposite side of the support surface 12a. The upper engaging member restriction 璟 16 is made of a resin material, has a substantially C-shaped cutout portion 16 a, and has a small-diameter semicircular cross-section on the opposite surface of the cutout portion 16 a. It has a reservoir 16b and is formed so that it is restored in the center contraction direction with respect to the deformation in the outer peripheral expansion direction, so that the elastic force acting to grip the upper support rod 10b1U And is formed in a substantially rectangular body. Upper A flexible strip with a high surface friction coefficient 16 c such as vinyl tape is adhered to the inner surface to hold the upper support rod 1 O b 1 U of the engagement device control ring 16. When gripping the support rod 1 O b 1 U, the upper engagement member regulating ring 16 itself is substantially semi-fixed on the upper support rod 10 b 1 U with a sufficient friction coefficient. . When the upper engaging member restriction 璟 1 is engaged and fixed on the upper support rod 10 b 1 U in the vicinity of the portion of the second support plate 12 where the upper engaging member 14 is engaged. ♦ The upper supporting member restricting ring 16 is fixed and easy to attach and detach. By contacting the upper engaging member 14 of the second supporting plate 12, the second supporting plate 12 Is semi-fixedly fixed at that position on the upper support rod 10b1U. In this case, by deforming the upper engaging member restricting ring 16 such as adding an outwardly projecting portion, the upper engaging member restricting ring 16 is brought into contact with the second support plate 12 itself. Is also good. In order to disengage the upper engaging member restricting ring 16 from the gripped upper support rod 10b1U, the outer peripheral expansion of the restricting member 16 is changed by forming the upper engaging restricting ring. A pile is placed on the elastic force acting in the center contraction direction to restore the shape, and the worker opens the leg to release the upper support rod 10 b 1 U from the open notch 16 a. In this way, the control ring 16 is separated from the upper support rod 1 Ob 1 U. In the example of FIG. 2, although the position of the second support plate 12 on the upper support rod 10 b 1 U is semi-fixed, the upper engagement member restriction 璟 16 is used. However, the present invention is not limited to this example, and it is optional to fix the positions of all the support plates on the upper support rods with the upper engagement member restricting ring 16. In addition, only one of the one-to-two support plates fixed at an arbitrary position on one upper support rod is fixed semi-fixed by the upper engaging device restriction 16 that is easily removable. By firmly fixing the other one, the sliding adjustment work on the position of the support plate on the upper support bar can be performed only on the position of the support plate on one side. In this case, it is sufficient that the upper engaging member 14 of the carrier plate that is firmly fixed is fixed to the engaged upper support rod by an appropriate fixing means such as adhesion or accumulation. .

In the embodiment of the modification illustrated in FIG. 3, the upper and lower support rods 10 0 bl U and 1 O b 1 B of the support frame 10 are The engagement between the engaging members 21 and 24 and the upper and lower supporting rods 10b1U and 1Ob1B causes the above-described second frame to be inserted into the supporting frame 10. Instead of the supporting plate 14, a third supporting plate 17 is loaded. The third support plate 17 is provided with the above-described second support surface 12 a facing the i-th support surface 11 a of the first support plate 11, and further on the back surface thereof. A third support surface 17a having the same structure as the above-described first support surface 11a is integrally provided. Similarly, the engagement between the upper and lower engagement members 22 and 25 and the upper and lower support rods 10b1U and 1ObIB causes the support frame 10 to have The second supporting plate 12 is rotated 180 degrees around its own vertical center axis.The fourth supporting plate 18 having the same structure is mounted in the same manner as the third supporting plate 17. . Between the first support surface 11a of the first support plate 11 and the second support surface 12a in the third support plate 17, a substrate 2 having a predetermined width is set. The support grooves 1 1b in the support surface 11a of the first and the support grooves 1 2b in the second support surface i 2a are held by both sides 2c and 2d. On the other hand, between the third support surface 17a of the third support plate 17 and the fourth support surface 18a of the fourth support plate 18 Is between the first and second support surfaces 11a and 12b and the substrate 2 having a different width dimension, and in some cases, between the first and second support surfaces 11a and 12b. A substrate 2 having the same width dimension as that of the first and second holding surfaces 17a and 18a is locked by locking grooves 17b in the third supporting surface 17a and locking grooves 1813 of the fourth supporting surface 18a. It is carried by. In the example of FIG. 3, the pitch of the locking grooves 12 b formed in the vertical direction on the second supporting surface 12 a in the third supporting plate 17 The pitch of the locking grooves 17b formed in the third holding plate surface 17a in the vertical direction in multiple stages is selected to be the same value, but is not limited to this, and the pitches of both are different. Value, the third support plate has a vertical pitch different from the vertical pitch of the substrate 2 supported between the first support plate 11 and the third support plate 17. It is also possible to carry between the 17 and the fourth 'carrying plate 18 a different kind of substrate 2 than that between the first and third carrying plates 11> 17. In this case, the fourth support plate 18 has a different structure from the first support plate 11 at the pitch point of the locking groove 18b.

In the illustrated embodiment, the supporting frame 10 has six open faces 10a1, 10a2, 1010 corresponding to the six faces of a cube having a square planar projection cross section. a3, 10 a4, 10 a5, 10 a6 ¾ Assembled with support rods 10b so as to define, but the plane projection cross section of the support frame 10 is not limited to a square or a square . In the form of the modified embodiment shown in FIG. 4, the support frame 10 has a regular pentagonal plane projection cross section, and has seven open surfaces 10 a5 corresponding to the seven surfaces of the cube. 1, 10a52, 10a53, 10a54, 10a55, 10a56 Assembled with support rods 10b5 extending along the ridges of the seven surfaces to define 10a57 . In this case, from any of the five open surfaces 10 a51, 10 a 52, 10 a53, 10 a 54, 10 a 55 that are arranged facing the entire circumference around the vertical center axis of the support frame 10, The work access force to the substrate 2 between the carrier plates 11, 12, 17, 18 which are loaded on the substrate is easy. In general, the shape of the cross-section of the support frame body 10 when projected on a plane is sufficient if it is a polygon having a shape of a triangle or more. Industrial applicability

The present invention increases the integrated carrying density of the substrate, facilitates the transfer of the substrate while maintaining the high integrated carrying density, facilitates access to the accumulated and carried substrate from various aspects in operation, and Since it is possible to continuously cope with the difference in the width dimension for each type of substrate to be carried, the industrial use value is enormous.

Claims

The scope of the claims 1. a support frame 10 assembled with support rods 10 b extending along each ridge line of each face of the polyhedron so as to define each face of the polyhedron as an open face; A first horizontally provided locking groove 11b is provided in multiple stages in the vertical direction so as to lock one side 2c of the substrate 2 in a substantially horizontal posture as a supported member. A first supporting plate 11 having a supporting surface 11a of A locking groove 1 2b that is formed substantially horizontally so as to lock the other side 2 d facing the above one side 2 c of the substrate 2 in a substantially horizontal posture as a supported member is in a vertical direction. A second support plate 12 having a second support surface 12 a provided in multiple stages in At least one of the upper support rods 10b1U disposed on the first support plate 11 and extending substantially horizontally in the support frame 10 is slid in the longitudinal direction. A first upper engagement tool 20 movably engaged, The upper support rod 10 b disposed on the first support plate 11 and in the support frame 10. A first lower engaging member 23 that slidably engages in a longitudinal direction with at least one lower supporting rod 10 b 1 B extending substantially horizontally below 1 U; The upper support rod 10 b disposed on the second support plate 12 and in the support frame 10. 1 U, a second upper engaging member 14 slidably engaging in the longitudinal direction, and a lower portion of the support frame 10 provided on the second support plate 12. Support rod 1 0 b A second lower engaging member 15 that slidably engages in the longitudinal direction with respect to 1B, and a support frame holding mechanism that holds the support frame 10 movably relative to the floor surface. 1 3 and The first support surface i 1 a of the first support plate 11 and the second support surface 12 a of the second support plate 12 are disposed so as to face each other. A substrate carrier characterized in that the substrate 2 as a carrier is carried between the second carrying surfaces 11a and 12a. 2. The support frame support mechanism 13 is provided with casters 13a on the support rods 10b. 2. The substrate transfer device according to claim 1, wherein the support frame 10 is the same. 3. Engraved substantially horizontally so that one side 2c of the substrate 2 which is provided integrally with the back surface of the second support surface 12a and has a substantially horizontal posture as a supported body is locked. A third support plate 17 further provided with a third support surface 17 a in which the formed locking grooves 1 2 b are arranged in multiple stages in the vertical direction; A second support plate 18 having the same structure as the second support plate 12; The upper support rod 10 b disposed on the third support plate 17 and in the support frame 10. A third upper engaging member 21 that slidably engages in the longitudinal direction with respect to 1 U; and a lower portion of the support frame 10 that is disposed on the third support plate 17. Support rod 1 0 b A third lower engaging member 24 slidably engaging in a longitudinal direction with respect to 1B, and a third lower engaging member 24 disposed on the fourth support plate 18; Support rod 1 0 b A fourth upper engaging member 22 slidably engaging in a longitudinal direction with respect to 1 U, and a fourth lower engaging member 22 disposed on the fourth supporting plate 18, and Support rod 1 O b A fourth lower engagement member 25 that slidably engages in the longitudinal direction with respect to 1B; The third support surface 17a of the third support plate 17 and the fourth support surface 18a of the fourth support plate 18 are disposed so as to face each other. 4. The substrate 1 as claimed in claim 1 or claim 2, wherein the substrate 2 is supported also between the supporting surfaces 17a, 18a of the fourth member 4. 4. The second support surface 12 of the second support plate 12 near the position where the second upper engagement member 14 on the upper support rod 1 O b 1 U is engaged and fixed. On the side opposite to a, it is easily and resiliently latched to the upper support rod, and comes into contact with the upper engaging member 14 or the support plate 12 itself to form the support plate 12. The upper engaging rod restricting ring 16 for restricting the sliding along the longitudinal direction of the upper supporting rod 10 b 1 U is further provided.