JP3225475B2 - Work tray - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work storage tray used for storing and transporting a work such as a printed circuit board, and more particularly to an improvement in a structure for storing the work.

[0002]

2. Description of the Related Art In this type of work, especially on a mounting board, storage or transportation is performed while being protected and stored in a predetermined tray to protect mounted components. Such a tray is made of a resin molded product and has a plurality of concave portions corresponding to the number of printed circuit boards to be stored, and the printed circuit boards are supported at their ends by ribs in the concave portions. Generally, in order to manufacture a tray of this type, it is necessary to form a plurality of patterns corresponding to the concave portions in a mold for manufacturing the tray.

[0003]

In general, when the number of workpieces stored is increased, the size of the tray is increased. As a result, the size of the die for manufacturing the tray is increased, and the die processing cost is also increased. There is a problem that the initial investment amount for the investment is large. If the type of work is different, the size will change.Therefore, it is necessary to design the size and arrangement of the recesses in the tray so that these works can be accommodated. Must. Work such as a printed circuit board has been tending to produce a large variety of products in small quantities year by year, and the above problem has become more pronounced. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a work storage tray that requires a small initial investment amount.

[0004]

The present invention employs the following configuration to achieve the object. That is, a work storage tray configured to store a plurality of works has a tray plate and a work holder formed separately from the tray plate, and a stepped portion is provided above the work holder. And the work holder is fixed to the tray plate so that the work can be accommodated between the steps of the plurality of work holders.

It is desirable that a plurality of notches are formed in the tray plate in accordance with the size of a work, and holes for fixing a work holder are formed at four corners of the notches.

[0006]

According to the present invention, in the conventional configuration in which the work storage tray is integrated with the storage body and the tray, a plurality of patterns corresponding to the recesses for storing the work are formed in the mold for manufacturing the tray. Although it is necessary, in a configuration in which the workpiece holder and the tray plate on which the holder is mounted are separated, the workpiece holder is prepared, and the tray plate is formed by machining such as punching or cutting. This eliminates the need for a mold for manufacturing the storage tray. Even if a work having a different size is newly generated, only the tray body needs to be manufactured, so that the initial investment amount can be reduced as compared with the configuration in which the storage body and the tray are integrated.

[0007]

Next, an embodiment of a work storage tray according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of a tray for storing a work 2, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is an exploded perspective view.
The storage tray 1 includes a tray plate 3 and a resin work holder 4 formed separately from the tray plate 3. The tray plate 3 is formed of metal, preferably lightweight aluminum, and has a plurality of rectangular cutout holes 5 formed at regular intervals in a lattice shape so as to prevent the mounting components of the work 2 from hitting. As shown in FIG.
In each of the four corners, a work holding fixture fixing hole 6 is formed as a round hole, two at each corner. Each notch hole 5 and the fixing hole 6 for the work holder are cut out so that they have the same size.
Or it is formed by cutting.

The work holder 4 has a stepped portion 7 in which one corner of the work 2 fits in the upper portion, and a snap portion 8 inserted into the work holder fixing hole 6 is provided on the lower surface. In this embodiment, two fixing holes 6 of the tray plate 3 are formed, and two snap portions 8 are formed on the work holder 4 corresponding to the fixing holes 6.
This is for the purpose of preventing the rotation, and the boss may be fitted in the fixing hole 6 instead of the other snap by using only one snap portion 8. When the fixing hole 6 is formed as a square hole, the snap portion 8 may be provided at one place. Known means such as a pair of elastic engagement pieces 9 as shown in FIG. 4 and an anchor-type elastic engagement piece 10 as shown in FIG. 5 are used for the snap portion 8, for example.

When mounting the work holder 4 in the fixing hole 6 of the tray plate 3, as shown in FIG. 3, the work holder 4 is opposed to the fixing hole 6 and then pushed in. The snap portion 8 is pushed into the fixing hole 6 while being elastically deformed inward, and is elastically restored as shown in FIG. 2 and the work holder 4 is fixed to the tray plate 3. After the work holder 4 is completely mounted on the four corners of the notch 5, the work 2 is placed on the step 7 of the holder 4 from above, so that the step 7
Work can be supported between. The size of the notch hole 5 in the tray plate 3 and the size of the tray plate 3 are changed according to the type of the work 2 so that various types of works 2 can be accommodated between the work holders 4.

According to the above embodiment, since the notch hole 5 and the work holder fixing hole 6 are formed in the tray plate 3 by punching or cutting, the manufacturing die for forming the tray plate 3 is formed. Can be eliminated. And, even if the type of the work 2 is different, the tray plate 3 corresponding to the type can be easily formed by punching or cutting. In this case, compared to the case where the tray is integrally formed of resin by vacuum molding, the dimensional accuracy can be improved by the amount of no heat shrinkage of the resin. Therefore, the work storage tray of the present embodiment is suitable for use in a transfer line of an automatic machine requiring dimensional accuracy.

Next, a second embodiment will be described. As shown in FIG. 6 as a cross-sectional view, this embodiment differs from the first embodiment in that there is no rectangular cutout hole 5 formed so that a mounting component on the lower surface of the work does not hit. In this embodiment, the height of the work holder 4 is sufficiently secured by the height of the mounting component 11, and the rectangular notch hole 5 of the first embodiment is used.
Is omitted. In this case, only the work holder fixing holes need to be formed in the tray plate 3.

In the above-described embodiment, the work holder 4 has the stepped portion 7 which fits into the corner portion. However, as shown in FIG. The step 12 may be formed so as to support the end.

A thermoplastic resin such as polyamide can be used as a material for the work holder of the above embodiment.
When the work is a mounting substrate, a conductive material is preferable in view of measures against static electricity. In the above embodiment, the work holder may be made of not only resin but also metal.
Also, as a tray plate, not only aluminum,
Other metals, such as iron, can also be used.

[0014]

Since the present invention is configured as described above, the following effects can be obtained. According to the first aspect of the present invention, there is provided a tray plate and a work holder formed separately from the tray plate, wherein a step portion is formed on the upper portion of the work holder, and a plurality of work holders are provided. Since the work holder is fixed to the work plate so that the work can be accommodated between the parts, if the work holder is prepared, even if the type of work changes, the tray plate can be removed or cut. Since it can be formed without manufacturing a molding die, a low-cost work storage tray can be provided.

According to the second aspect of the present invention, when components are mounted on the lower surface of the work, there is no fear that the components hit the tray plate and are damaged.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an exploded perspective view showing one embodiment of the present invention.

FIG. 4 is an explanatory view showing one embodiment of a snap portion of the work holder of the present invention.

FIG. 5 is an explanatory view showing another embodiment of the snap portion of the work holder of the present invention.

FIG. 6 is a sectional view showing another embodiment of the present invention.

FIG. 7 is a perspective view showing another embodiment of the work holder of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage tray 2 Work 3 Tray plate 4 Work holder 6 Work holder fixing hole 7 Step 8 Snap

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-96399 (JP, A) JP-A-3-276699 (JP, A) JP-A-61-252692 (JP, A) JP-A-58-58 147047 (JP, A) Fully open Hei 3 57965 (JP, U) Fully open Hei 2 35498 (JP, U) Fully open Hei 4-123583 (JP, U) Fully open Showa 55-27619 (JP, U) Japanese Utility Model Showa 63-134589 (JP, U) Japanese Utility Model Showa 54-132765 (JP, U) Japanese Utility Model Showa 47-4361 (JP, U) Japanese Utility Model Showa 53-116472 (JP, U) (58) (Int.Cl. ⁷ , DB name) B65D 77/08-81/26

Claims (2)

(57) [Claims] 1. A work storage tray configured to store a plurality of works, comprising: a tray plate; and a work holder formed separately from the tray plate. A work storage tray in which a work holder is fixed to a tray plate so that a work is formed between the steps of a plurality of work holders. 2. The work tray according to claim 1, wherein a plurality of cutout holes are formed in the tray plate in accordance with the size of the work and the number of stored work pieces, and work holder fixing holes are formed at four corners of the cutout holes. Work storage tray.