JP2010120650A - Twisted stack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a twisted stack for preventing an excess fitting of the stacks each other from occurring when a plurality of conveying trays are stacked. <P>SOLUTION: The twisted stack 1 with a bottomed hole which is provided on a conveying tray 101 which can be stacked in a multi-stage way for conveying a rectangular plate-like body 24, includes an opening part 30 provided on a surface 101' of the conveying tray, a side part 32 extending downward from the opening part 30, and a bottom part 31 provided at the lower end of the side part 32. The opening part 30 has a projecting opening part 30a projecting to the outside of the system in the horizontal direction and a cutout opening part 30b recessed in the system in the horizontal direction. The bottom part 31 has a projecting bottom part 31a projecting to the outside of the system in the horizontal direction and a cutout bottom part 31b recessed in the system in the horizontal direction. The side part 32 has a twisted shape around the axial line of the stack 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a twisted stack, a rectangular plate-shaped transport tray including the twist-shaped stack, and a transport tray kit including the rectangular plate-shaped transport tray and the rectangular plate-shaped body. The twisted stack of the present invention differs in the form of the opening and the bottom by twisting (twisting) around its axis.

Conventionally, when a relatively small display element such as a mobile liquid crystal panel is transported, a liquid crystal panel or the like is placed on the transport tray, and then transported in a multi-layered manner. Damage to panels and the like (particularly liquid crystal panel glass surfaces and polarizing plates) is prevented. The upper transport tray stacked in this manner also functions as a lid for the lower transport tray, and the uppermost transport tray serves only as a lid without accommodating a liquid crystal panel or the like [FIG. ,reference〕.
Such a transport tray is a vacuum molded product obtained by vacuum molding a plastic material such as polypropylene using a mold. In addition, the transport tray includes a recess-shaped storage unit for storing a liquid crystal panel or the like at the center thereof, and includes a hole-shaped stack having a bottom portion mainly at the periphery thereof.
As such a stack, the following Patent Document 1 (hereinafter referred to as Document 1) proposes a stack having a cross-shaped bottom when viewed from below in a stacked state. When (workability) and position fixability are taken into consideration, (...) is omitted.
However, it has been found that such a cruciform stack has a very large fit into the lower stack of the upper stack. When such excessive fitting occurs, first, the bottom of the upper tray comes into contact with the display element (liquid crystal panel) of the lower tray, and the display element is damaged, and secondly, it is fitted. The operation of separating the stack becomes very complicated (usually because there are a large number of stacks). Third, when the operation of separating the stuck stack is performed, the elasticity of the transport tray causes the display element. There is a problem of falling damage from the transport tray.
In order to solve such a problem, Patent Document 2 (hereinafter referred to as Document 2) has a hole shape including a bottom portion having a Y-shape in plan view and a side surface substantially perpendicular to the bottom surface constituting the bottom portion. By adopting a configuration in which straight corners are formed on the side surface of the zero taper stack in a direction substantially perpendicular to the bottom surface, the resistance to fitting is increased, and excessive stacking is prevented. Disclosure to alleviate or avoid.
In the technical fields as described above, further improvement or improvement by another method is demanded for excessive fitting.

JP-A-11-198938 JP 2008-179416 A

  In view of the above-mentioned demand in the field, an object of the present invention is to provide a twist-shaped stack that prevents excessive fitting between stacks when a plurality of transport trays are stacked.

Means and effects for solving the problem

As a result of intensive studies to solve the above-mentioned problems, the present inventor, regarding the bottomed hole-shaped stack, by forming the side part in a twisted shape around the axis, the shape of the opening and the bottom part, By adopting a rotationally symmetric form that rotates about the axis, it is possible to substantially completely prevent the upper tray, the bottom lower tray, and the opening from being fitted into the tray when the trays are stacked. Based on this finding, the present invention has been completed.
That is, the present invention is a bottomed hole-shaped twisted stack provided in a transport tray that can be stacked in multiple stages for transporting a rectangular plate-shaped body,
An opening provided on the plane of the transport tray, a side extending downward from the opening, and a bottom provided at the lower end of the side,
The opening has a protruding opening protruding out of the horizontal system and a notch opening recessed in the horizontal system, while the bottom is protruded out of the horizontal system and recessed in the horizontal system. Has a notch bottom,
The side portion provides a twisted stack characterized in that a twisted shape is formed around the axis of the stack.
In the known stack, the ridge line part that forms the boundary between the protruding side part and the notch side part is substantially perpendicular to the bottom surface constituting the bottom part, and extends parallel to the axis of the stack.
According to the present invention, such a ridge line portion relates to a stack having a bottomed hole with an axial line of the stack, and the side portion is formed in a twisted shape around the axis so that the shape of the opening and the bottom portion is By adopting a form rotated around the center, when the trays are stacked, the upper tray / bottom form does not overlap with the lower tray / opening form, thereby making it possible to prevent the fitting substantially completely. The technical effect was achieved.

  Preferably, the side portion has a protruding side portion connected to the protruding opening portion and a notched side portion connected to the notched opening portion, and the twisted shape constitutes a boundary between the protruding side portion and the notched side portion. The ridge line portion is formed by inclining with respect to the bottom surface constituting the bottom portion, and the protruding opening portion and the protruding bottom portion have apexes, while the notched opening portion and the notched bottom portion are A planar view positional relationship around the axis line of the protruding bottom portion and the cutout opening adjacent to the corresponding protruding opening has a bottom point of the cutout bottom portion and the bottom point of the cutout opening portion. ,Match.

Moreover, this invention provides the conveyance tray for rectangular plate-shaped bodies provided with the twist-shaped stack of this invention as the 2nd aspect.
Furthermore, the present invention provides a transport tray kit comprising the transport tray for the rectangular plate body and the rectangular plate body stored in the transport tray for the rectangular plate body.

As described above, the present invention is a twisted stack (1) having a bottomed hole shape provided in a transport tray (101) that can be stacked in multiple stages for transporting a rectangular plate (24). There,
An opening (30) provided on the plane (101 ′) of the transport tray, a side (32) extending downward from the opening, and a bottom (31) provided at the lower end of the side. ,
The opening has a protruding opening (30a) protruding out of the horizontal system and a notch opening (30b) recessed in the horizontal system, while the bottom is a protruding bottom (out of the horizontal system) 31a) and a notch bottom (31b) recessed in the horizontal system,
The side portion provides a twisted stack characterized in that a twisted shape is formed around the axis of the stack (see attached FIG. 1 and the like).
Here, the “rectangular plate-like body” to be transported means a high-function device or the like, in which not only a rectangular plate-like body such as a display device, for example, a liquid crystal panel, particularly a mobile liquid crystal panel, but also a lead wiring is formed. Like a liquid crystal panel with a TCP with a tape carrier package (TCP) mounted on a liquid crystal panel with an LSI bare chip mounted on a tape-like insulating film and connected to a lead, or a liquid crystal panel with a printed circuit board with a printed circuit board mounted on the liquid crystal panel Also included are rectangular plates with appendages.
The rectangular plate-shaped transport tray (hereinafter referred to as a transport tray) has a dish-like shape that opens upward, and stores and transports the rectangular plate-shaped body, such as a sheet of polypropylene or polystyrene. This is a molded product obtained by vacuum-forming a resin material in the form of a mold.
In the present specification, the terms “upward / downward”, “horizontal / vertical direction”, and “planar view” are based on a state in which the transport trays of the present invention are stacked in multiple stages. Therefore, the term “plan view” is based on the state seen from above or below.

Next, the present invention will be described in more detail by describing the best mode for carrying out the present invention with reference to the attached drawings. However, the present invention is not limited to these embodiments and the like. Absent. Note that, in the accompanying drawings, the same elements are sometimes omitted in the drawings and explanations thereof are omitted in some cases.

-Twist-shaped stack 1 ... embodiment-
FIG. 1 is a perspective view showing an embodiment of the twisted stack according to the present invention as viewed from below, and a transport tray and the like are omitted. FIG. 2 is a schematic diagram of the positional relationship in plan view of the opening and the bottom of the twisted stack shown in FIG. 1 as viewed from below.
The twisted stack 1 includes an opening 30 provided on a flat surface 101 ′ (see FIG. 5) of the tray 101, and a cylindrical side portion 32 extending downward (upward in FIG. 1) from the opening 30. The bottom portion 31 provided at the lower end (the upper end in FIG. 1) of the side portion 32 is provided, and is formed into a hollow bottomed hole shape.
<Opening 30>
The opening 30 includes three projecting openings 30a projecting out of the horizontal system and three notch openings 30b recessed in the horizontal system, and has a Y-shape in plan view [FIGS. 1 and 2] ,reference〕. This Y-shaped form is a form in which each arc portion of each circle of a predetermined radius having a center at a substantially equal distance from the center of the virtual circle 37 at a substantially equal planar view angle is cut from the virtual circle 37. is there.
<Side 32>
The side part 32 extends downward from the opening part 30 to connect the opening part 30 and the bottom part 32. Further, the side part 32 is connected to the three projecting side parts 33 connected to the projecting opening part 30a and the notch opening part 30b. Three consecutive cutout side portions 34 are provided. The side portion 32 forms a twisted shape around the axis of the stack 1 (that is, the axis passing through the center of the opening 30 and the bottom 31). The twisted shape includes the protruding side 33, the cutout side 34, and the like. It is formed by inclining the ridge line part 34 that forms the boundary of the bottom part 32 with respect to the bottom surface constituting the bottom part 32. With respect to this inclination, the inclination direction may be clockwise or counterclockwise about the axis. Moreover, it can be said that this ridgeline part 34 is a curve which comprises a part of helical shape around an axis line. Furthermore, the ridge line part 34 of the side part 32 is preferably curved from the viewpoint of facilitating manufacturing, but the ridge line part 34 can also be formed linearly. The inclination means that the ridge line portion is perpendicular to the bottom surface as in the case of a known non-twisted stack.
The ridge line portion 34 connects the intersection of the protruding bottom portion 31a and the side portion 32 of the cutout bottom portion 31b and the intersection of the protruding opening portion 30a and the side portion 32 of the cutout portion opening portion 31b.
In addition, the three protruding side surfaces 33 and the three notch side surfaces 35 each have the same surface area. Thus, by having the side parts 33 and 35 of the same form, the mechanical strength of the stack 1 is stabilized.

<< Twisted shape >>
The twisted shape of the embodiment can also be defined as follows, with the positional relationship between the bottom 31 and the opening 30 being a rotationally symmetric form.
As shown in FIG. 2, the positional relationship around the axial line between the protruding bottom 31a and the corresponding protruding opening 30a is shifted by 60 degrees between the former vertex 311a and the latter vertex 301a. [Θ1 in FIG. 2]. Similarly, the positional relationship around the axis line of the projecting bottom 31a and the notch opening 30a adjacent to the projecting opening 30a corresponding to the difference in angle of 60 degrees is that the former vertex 311a and the latter bottom point 301b. Similarly, the base 311b and the vertex 301a match. The “projecting bottom portion 31a and the corresponding projecting opening 30a” are connected by the ridge line portion 34 as described above.
As described above, the combination shape of the protruding bottom portion and the cutout bottom portion extending in the horizontal direction along the outer edge of the bottom portion 31, and the protruding opening portion and the cutout opening portion extending in the horizontal direction along the outer edge of the opening portion 30. With the combined shape, a predetermined positional deviation in the outer peripheral direction is generated so as not to overlap each other in plan view. Accordingly, it is possible to reliably prevent the upper and lower stacks 1 from being fitted to each other in the stacked state, and to function as a spacer.
As in this embodiment, with respect to the projecting bottom 31a and the notch opening 30b adjacent to the projecting opening 30a corresponding thereto, the former bottom point and the latter vertex are formed to form a twisted shape. The twist angle around the axis is calculated as 360 degrees × (1/2) × (1 / N) where N is the number of protrusions (notches), and in this embodiment, N = 3. The angle is 60 degrees. N is a positive integer of 2 or more.
<Bottom 31>
Similar to the opening 30, the bottom 31 includes three protruding bottoms 31a protruding out of the horizontal system and three notched bottoms 31b recessed in the horizontal system, and has a Y-shaped configuration in plan view. [Refer to FIG. 1 and FIG. 2], this Y-shaped form has each of the predetermined radii each having a center from the virtual circle 37 at substantially the same distance from the center of the virtual circle 37 and at substantially the same planar view angle. It is the form which notched each circular arc part of the circle.
Note that the edge portion 31c corresponding to the boundary between the protruding bottom portion 31a, the cutout bottom portion 31b, and the side portion 32 is pointed at an acute angle, but it is not always necessary to have an acute angle (see the black circle portion in FIG. 1).

<Production method of stack>
The mold for this embodiment is formed, for example, by cutting from a circular base mold portion (ie, a cylindrical portion) having a diameter of 12 mm in plan view. After vacuum forming, the molded product is rotated in the circumferential direction. However, the twisted shape of the side portion 32 can be obtained by releasing the mold. In addition, if a separate mold is used, the mold can be easily released even when a plurality of stacks exist on the tray.

-Twist-shaped stack 1 ... Modification-
FIG. 3 is a perspective view seen from below showing a variation of the twisted stack of FIG. 1, and FIG. 4 is a plan view of the opening and bottom of each variation of the stack shown in FIG. It is the schematic diagram which looked at the positional relationship from the downward direction.
3A corresponds to a modification in which N = 2 and the twist angle is 90 degrees [θ2 in FIG. 4], and FIG. 3B shows a twist angle of 45 degrees when N = 4 [FIG. [Theta] 3], the former has an I-shape in plan view, while the latter has a cross shape in plan view. In these modified examples, the former bottom point and the latter vertex coincide with each other with respect to the projecting bottom 31a and the notch opening 31b adjacent to the projecting opening 30a corresponding to the projecting bottom 31a [FIG. ,reference〕.

-Conveying tray 101 for rectangular plate-shaped body--Embodiment-
FIG. 5 is a plan view showing an embodiment of the rectangular plate-shaped transport tray of the present invention having the twist-shaped stack embodiment shown in FIG. 1, and FIG. 6 shows this rectangular plate-shaped transport tray. It is an expanded side view of the twist-shaped stack in the state which laminated | stacked two or more.
The transport tray 101 of this embodiment has a substantially rectangular shape in plan view, the twisted stack 1 of the present invention that functions as a spacer, the non-twisted stack 2 that functions to hold a laminated state, and a plurality of rectangular plates And a container 6 for a body.
<Twist shape stack 1>
In FIG. 6, the twisted stack 1 has an opening 30-1 and a bottom 31-1, and other trays are stacked above and below the tray having the stack 1. The twisted stack 1 has its opening 301 in contact with the bottom 31-0 of the upper tray 1, while its bottom 30-1 is in contact with the opening 30-2 of the lower tray 1, and the upper and lower trays are spaced apart. It is held by S and functions as a spacer.
The taper angle of the side wall with respect to the plane 101 ′ of the stack 1 is 90 degrees, which is a so-called zero taper stack, but it may be a normal taper or a reverse taper stack.
<Non-twisted stack 2>
The non-twisted stack 2 is provided along each side of the transport tray 101 having a substantially rectangular shape in plan view, and is located outside the region where the twisted stack 1 is provided. For example, the zero-tapered stack disclosed in the above-mentioned document 2 can be used as the non-twisted stack 2. Various known stacks having a function of maintaining the state can be used. Since the transport tray 101 of this embodiment can reliably maintain the interval between the stacked transport trays 101 by the twisted stack 1, it is ensured that the upper and lower non-twisted stacks 2 are excessively fitted. Can be prevented.
<Storage unit 6 for rectangular plate-like body>
The rectangular plate-shaped storage portion 6 is a tapered concave portion having a taper angle of 95 degrees, and can accommodate the liquid crystal panel 24 with a printed circuit board as the rectangular plate-shaped body 24 (FIG. 7). The liquid crystal panel 24 includes a liquid crystal panel body 21, a printed board 22, and a tab 23.
<Other elements>
The transport tray 101 includes, as other elements, four corners 3 and 4 having a rectangular shape in plan view (see FIG. 5). The three corners 4 are linear, and the other one corner 3 forms an arc shape, whereby the direction is easily determined when stacking the asymmetrical conveyance trays 101. (Fig. 5). Further, as another element, the transport tray 101 includes ribs 7 on the outer periphery thereof, and can reinforce the edge 5 that is the outer periphery. Also, around the storage portion 6, there is provided a concave finger removal portion 8 for storing the rectangular plate-like body 24 in the transport tray and for taking out the rectangular plate-like body 24 stored in the transport tray [FIG. 7] This facilitates accommodation / removal of the rectangular plate-like body 24.

The transport tray 101 of the present invention is used as follows, for example. FIG. 8 is a perspective view showing a process until the rectangular plate-shaped conveyance tray of the present invention is packaged.
First, the liquid crystal panel 24 as a rectangular plate is placed on the transport tray 101, the placed transport trays 101 are stacked in multiple stages, and the stacked transport trays 101 are double-wrapped in cardboard boxes 41 and 42. To do. The packaged stacked conveyance tray 101 can be applied to distribution in factories, distribution between factories, shipment to overseas, and the like. The transport trays 101 stacked in multiple stages can also be packed in cardboard boxes 41 and 42 after being wrapped with aluminum foil and degassed inside.

The perspective view seen from the bottom which shows the embodiment of the twist shape stack of the present invention. The schematic diagram which looked at the positional relationship in the planar view of the opening part and bottom part regarding the twist-shaped stack shown in FIG. The perspective view seen from the lower part which shows the modification of the twist shape stack | stuck of FIG. The schematic diagram which looked at the positional relationship in the planar view of the opening part and bottom part regarding each modification of the stack | stuck shown in FIG. FIG. 2 is a plan view showing an embodiment of a rectangular plate-shaped transport tray according to the present invention including the twist-shaped stack embodiment shown in FIG. FIG. 6 is an enlarged side view of a twist-shaped stack in a state where a plurality of rectangular plate-shaped conveyance trays shown in FIG. 5 are stacked. The top view seen from the top which shows the state which accommodated the rectangular plate-shaped body (liquid crystal panel with a printed circuit board) in the accommodating part of the conveyance tray for rectangular plate-shaped bodies shown in FIG. The perspective view which shows the process until it packages the conveyance tray for rectangular plate-shaped bodies of this invention.

Explanation of symbols

1: Twist-shaped stack 24: Rectangular plate 30: Opening 30a: Protruding opening 30b: Notch opening 31: Bottom 31a: Protruding bottom 31b: Notch bottom 101: Conveying tray for rectangular plate 101 ': Plane

Claims (5)

A twisted stack having a bottomed hole shape provided in a transport tray that can be stacked in multiple stages for transporting a rectangular plate-shaped body,
An opening provided on the plane of the transport tray, a side extending downward from the opening, and a bottom provided at the lower end of the side,
The opening has a protruding opening protruding out of the horizontal system and a notch opening recessed in the horizontal system, while the bottom is protruded out of the horizontal system and recessed in the horizontal system. Has a notch bottom,
The twisted stack characterized in that the side portion forms a twisted shape around the axis of the stack. The side portion has a protruding side portion continuous with the protruding opening portion and a notched side portion continuous with the notched opening portion,
2. The twist-shaped stack according to claim 1, wherein the twisted shape is formed by inclining a ridge line portion constituting a boundary between the protruding side portion and the notched side portion with respect to a bottom surface constituting the bottom portion. The protruding opening and the protruding bottom have a vertex, while the notched opening and the notched bottom have a bottom point;
The positional relationship in plan view around the axis between the protruding bottom and the cutout opening adjacent to the corresponding protruding opening is such that the apex of the protruding bottom coincides with the bottom of the cutout opening. Item 2. The twist-shaped stack according to item 1. A transport tray for a rectangular plate-like body, comprising the twisted stack according to claim 1. A transport tray kit comprising: the transport tray for a rectangular plate-like body according to claim 4; and the rectangular plate-like body stored in the transport tray for the rectangular plate-like body.

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