JPH0647288A - Tray for aligning and transporting spit pipe or the like and its production - Google Patents

Abstract

PURPOSE:To prevent stacking over the entire part of the trays and to obviate the deformation of the recessed parts of the lower trays at the time of peeling by displacing the upper and lower tray bodies from each other which are molded of thermoplastic sheets, are randomly formed with hollow grooves communicating adjacent recessed parts with each other over the central part from outer rows and are superposed on each other. CONSTITUTION:The square tray bodies 1 which consist of the thin thermoplastic sheets and are arranged with the recessed parts 2 of the same number longitudinally and cross at equal intervals are randomly formed with the hollow grooves 3 communicating the upper walls of at least two pieces of the adjacent recessed parts 2 in the arbitrary positions of the tray bodies 1 with each other from the outer rows toward the central part. Consequently, the upper and lower tray bodies to be superposed are displaced by 90 deg.C each from each other, by which the stacking is prevented over the entire surface of the trays.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray for aligning and carrying tube rod-shaped articles integrally formed of a thin plastic sheet of about 0.5 mm and a method for producing the tray.

[0002]

2. Description of the Related Art For example, a large amount of blood for testing, which is handled daily in hospitals and laboratories, is usually dispensed quantitatively to a transparent glass Spitz tube (test tube) for component testing. Each Spitz tube, which is aligned with 50 to 100 as one unit, is required to maintain an upright state accurately in order to allow mechanical injection of a reagent.

Conventionally, as such an aligning or conveying tool, a frame body vertically and horizontally partitioned by an aluminum wire or the like, or a honeycomb made of paper and having a bottom plate attached to the bottom has been widely used.

[0004]

In the conventional aligning / conveying tools described above, the bottom plates are flat, so that the hemispherical bottom surfaces of the respective Spitz tubes to be inserted are supported by point contact, so that they are stable. In order to make it stand upright, it is necessary to support it in the long range of the Spitz tube body, and the total height of the tool is long, so not only is it wasteful in terms of material, but also the transportation and storage of the tool itself. There were problems such as requiring a large space.

The former, in particular, has a high cost due to its structure, so that the former is forced to be repeatedly used, and the above-mentioned inconvenience tendency is more remarkable.

On the other hand, in view of the advanced plastic molding technology in recent years, the aligning / conveying tool for the above purpose is molded into a semi-concave spherical shape which follows the bottom shape of many Spitz tubes to measure the entire contact with the bottom surface. Even if the support length of the Spitz tube body is shortened by doing so, it is naturally conceivable to economically mass-produce the molded product of the tray in which the upright state of the Spitz tube can be stably obtained. Since a large number of unit trays that are cut in sequence and drop the shooter are polymerized, in the concavo-convex structure for preventing stacking that was conventionally provided in the peripheral flange portion of this type of molded product, each of the central parts of the upper and lower trays Since the recesses settle under the weight of the upper tray and fit tightly together, not only was it time-consuming to separate them one by one during use, but the lower recesses followed the upper recesses when peeling. Floating Te are those fatal defect was observed that deformation.

[0007]

In view of the above circumstances, the present invention prevents the sedimentation of the central portion of a thin-walled plastic tray having a large number of recesses corresponding to the hemispherical bottom surface of a Spitz tube and prevents the sedimentation of the portion. By preventing stacking between the recesses that are vertically overlapped with each other, the problem of the thin plastic tray in the prior art is solved.

That is, it consists of a thin plastic sheet,
Means for providing at random random grooves extending from the outer row to the central portion that connect between the upper walls of at least two adjacent recesses at arbitrary positions in a square tray in which the same number of recesses are arranged at equal intervals in the vertical and horizontal directions Was used.

Also, a large number of cavities (one-unit tray type) having the same shape as a unit tray in which a large number of concave portions and random concave grooves communicating between the concave portions are provided on a substantially square mold surface having a constant width. In order to provide the same number of rows and columns, a long thin plastic sheet corresponding to the width of the mold is formed by a vacuum forming method using a mold configured so that the cavities adjacent to each other are displaced by 90 °, and then punched sequentially by a puncher. , The punched tray main body of each row was dropped and piled up for continuous production.

[0010]

The tray of the present invention having the above-described structure is formed from a thermoplastic sheet having a thickness of about 0.5 mm, and at least random grooves are formed at the outer rows to the central portion to communicate between the adjacent concave portions. Thus, the upper and lower trays to be superposed are displaced from each other by 90 ° so that stacking can be prevented over the entire surface of the tray and deformation of the concave portion of the lower tray can be eliminated at the time of peeling.

As a method of manufacturing this type of tray, when the same number of cavities each having the same shape as one unit are provided on the mold surface in the vertical and horizontal directions, adjacent cavities are displaced by 90 ° from each other. When the unit trays in each row are sequentially punched out and dropped from a long plastic sheet that has been simultaneously molded by the above method, and the trays are piled up, the recesses mainly of each tray do not fit tightly, and the upper and lower sides are securely fitted over the entire surface. It has the effect of preventing stacking.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in more detail below with reference to the respective embodiments shown in the drawings. In FIGS.
A tray main body made of a mm-thick polyethylene terephthalate (hereinafter referred to as “PET”) sheet, 2 is a large number of recessed portions squeezed on one surface of the tray main body, and 3 is at least two adjacent adjacent arbitrary positions. The concave grooves are provided so as to communicate between the upper walls of the concave portions 2, and are arranged at random from the outer row to the central portion of the large number of concave portions 2.

The tray of the present invention exemplified above is applied to a Spitz tube having a barrel diameter of 15 mm, and the bottom of the Spitz tube is formed by forming a gradual taper in which each recess has an opening diameter of 16 mm and a lower portion of 15 mm. If the bottom of a Spitz tube (not shown) is inserted into each recess by shifting to a hemispherical bottom that matches the shape and the depth is set to 15 mm, the bottom of the Spitz tube is the bottom of the recess and the peripheral wall. It is possible to firmly maintain the upright state by closely contacting with.

According to the above embodiment using a PET sheet having a thickness of 0.5 mm, the upright state of the Spitz tube is unstable when the depth of the recess 2 is about 10 mm, and the opening diameter of the recess 2 is 16 mm. It was found that the minimum distance between the adjacent concave portions when the depth is 15 mm is 1.8 mm, but the material of the plastic sheet is not limited to PET, and any material can be used.

Next, FIG. 3 shows a die 4 for molding a tray in the above-mentioned embodiment, which is a unit cavity (A) having exactly the same shape as that for molding one unit of the tray main body 1 as shown in FIG. In (B) and (C), a total of 9 cavities are combined in units of 3 units in length and width, and the cavities are arranged as shown in FIG.
It is provided by transposing to 0 °.

When the individual unit trays according to the present invention are molded by the mold having the above structure, as shown in FIG. 4, a long thin plastic sheet (S) having a width corresponding to the width of the mold is used. It is moved to a vacuum forming zone (Z) where it is intermittently moved by a length commensurate with the length of the mold, heated and molded,
The sheet (s) thus formed is cut from the front row [for example, (A), (B), and (C) in FIG. 3] by the puncher (P) into the tray main body 1. The individual unit trays are guided by the shooter (H) and drop. Then, the second row supplied to the puncher (P) [for example, (B), (C), (A) in FIG. 3].
Are similarly punched out and fall on each shooter. In this case, the unit tray (1b) is on the previous unit tray (1a) and the unit tray (1c) is on the previous unit tray (1b). As described above, the unit trays displaced by 90 ° are sequentially stacked in the same manner.
The positions of the two do not shift with each other and do not settle down due to the weight of the upper tray, and therefore the stacking of the upper and lower concave grooves 2.2 can be reliably prevented.

Although the number of cavities arranged in the mold should be freely designed according to the width and size of the molding machine, the shooter (H) punched out by the puncher (P) is dropped. It is important to make sure that the positions of the concave grooves 3, 3 of the unit trays that are vertically stacked are not aligned.

[0018]

As described above, since the bottom surface of the aligning and carrying tray of the present invention is formed so as to conform to the shape of the bottom portion of the target pipe rod material, the supporting length of the body portion can be minimized. In addition to maintaining sufficient upright stability, it is suitable for mass production with thin plastic sheets, and stacking mainly of stacked trays can be reliably prevented, so there is no labor to peel off at the time of use or deformation of the bottom of the groove. Therefore, the productivity can be remarkably improved. Therefore, the tray having the above structure can be provided at a low cost, and is most suitable as a disposable tray. In this case, the one using PET as the sheet material is harmless even if it is incinerated, which is further advantageous.

[Brief description of drawings]

FIG. 1 is a plan view of an alignment / transport tray according to the present invention.

FIG. 2 is a front view showing the left half of the tray in section.

FIG. 3 is a plan view showing an arrangement of cavities of a tray molding die.

FIG. 4 is a front view showing an example of a manufacturing process.

[Explanation of symbols]

 1 Tray Main 2 Recessed 3 Recessed 4 Mold

Claims (2)

[Claims] 1. An outer row of grooves formed of a thin plastic sheet, which communicates between upper walls of at least two adjacent recesses at arbitrary positions of a square tray main body in which the same number of vertical and horizontal recesses are arranged at equal intervals. Alignment of Spitz tubes, etc. characterized by being formed at random from the center to
Transport tray. 2. The same number of cavities for forming unit trays of the same type, in which a large number of concave portions and random concave grooves that connect the concave portions to each other are provided in a substantially square mold surface having a constant width, are provided in the vertical and horizontal directions. , A long thin plastic sheet corresponding to the width of the mold was formed by a vacuum forming method by using a mold configured such that cavities adjacent to each other were displaced by 90 °, and punched and punched sequentially by a puncher. A method of manufacturing trays for aligning / transporting Spitz tubes, etc., in which unit trays in a row are dropped and stacked.