JP2022062633A - Tray for article conveyance and its manufacturing method - Google Patents

Abstract

To achieve a tray for article conveyance for conveying a heavy article with a material other than ABS while having strength required for conveying.SOLUTION: A tray T for article conveyance of a synthetic resin comprises: a recessed part T1 in which a flange F is projected on a peripheral side to house an article A while retracting; and a flange receiving part 10 provided on the periphery of an opening part 6 of the recessed part T1 for suspending the article A by the flange F protruded from the article A. The tray T is divided into a tray bottom part 1 in which a bottom part 2 in the recessed part T1 is provided while being recessed and a tray body part 5 penetrating the opening part 6 in the recessed part T1, and further they are constituted into a hollow shape by blow molding by using a thermoplastic resin material, and the tray bottom part 1 and the tray body part 5 are joined.SELECTED DRAWING: Figure 1

Description

The present invention relates to an article transport tray for packing an article having a flange when transporting the article, and a method for manufacturing the same.

For example, in order to pack an article having a complicated shape and a heavy weight, that is, when transporting a heavy object, the inner wall has a shape that follows the shape of the article so that the article does not move and be damaged during transportation. A molded transport tray is required.

In order to form an inner wall that follows the shape of an article, it is common to mold the tray with synthetic resin, and vacuum forming is the most suitable molding method (Patent Documents 1, 2, etc.).

Conventionally, vacuum forming is optimal for trays that can use acrylonitrile-butadiene-styrene resin (also called "ABS"), which has high strength, as a material and have strength that can withstand heavy objects. It was thought that it could be achieved.

JP 2001-88889 Japanese Patent Application Laid-Open No. 3-56262

As described above, in the prior art, as a transport tray used for packing heavy objects having flanges such as a chamber member of a vacuum device, a housing portion of a motor, and a joint member of a pipe. Was generally made of ABS by vacuum forming in consideration of the strength of the tray. However, the member has a problem that it is weak in light resistance such that the strength is deteriorated by sunlight and ultraviolet rays. In addition, although the member has high strength, it has low flexibility, so that it is fragile to impact and has low impact resistance. Therefore, the material constituting the tray for the above-mentioned application has higher impact resistance. It was hoped that the material would be expensive. Further, as a higher-level issue, if the transport trays for the above purposes are limited to those made of ABS, the choice of materials is narrow and it becomes an obstacle in terms of material procurement. Therefore, means other than those made of ABS. It was hoped that it would be realized by. That is, it has sufficient strength to transport heavy objects, it can be molded into a relatively complicated shape, it has excellent light resistance or impact resistance, and it is easy to procure materials. A compatible tray for transporting goods has not been realized.

The present invention has been created in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a tray for transporting articles having sufficient strength by means other than ABS by vacuum forming.

That is, the article transport tray of the present invention is an article transport tray for transporting an article having a flange protruding on the peripheral side, and has a recess for immersing and accommodating the article and an opening peripheral edge of the recess. Has a flange receiving portion for suspending the article with the flange, and the recess is a tray cylinder having a recessed bottom in the recess and an opening in the recess. The tray bottom portion and the tray body portion are provided in a hollow shape by a synthetic resin material that can be molded by blow molding, and are joined and integrated.

The invention according to claim 2 is characterized in that high-density polyethylene (also referred to as "HD-PE") is used as the synthetic resin material constituting the tray in the above-mentioned article transport tray. ..

The invention according to claim 3 is characterized in that, in the tray for transporting articles, the flange receiving portion is made of a molded elastomer and is joined to the peripheral edge of the opening of the tray body.

Further, the invention according to claim 4 is characterized in that, in the above-mentioned article transport tray, the above-mentioned recesses are provided at least in three or more places.

Further, according to the fifth aspect of the present invention, in manufacturing the above-mentioned article transport tray, the synthetic resin is formed into a hollow shape by blow molding using a thermoplastic resin material for each of the bottom of the tray and the body of the tray. When performing the blow molding, the elastomer flange receiving portion obtained by injection molding is set in a mold engraved with a notch into which the flange receiving portion is fitted, and then insert molding is performed. It is characterized in that the bottom of the tray and the body of the tray are joined.

The invention according to claim 6 is characterized in that HD-PE is used as the thermoplastic resin material used in manufacturing the above-mentioned tray for transporting articles.

Further, according to the invention of claim 7, when a plurality of elastomer flange receiving portions are injection-molded at the same time in manufacturing the above-mentioned article transport tray, the runner formed between the flange receiving portions is left and the insert is inserted. It is characterized by using a blow mold with a runner groove engraved in the molding.

In the article transport tray and the manufacturing method thereof of the present invention, the article transport tray for transporting heavy objects can be realized by using a material other than ABS while having the strength required for transporting.

An exploded perspective view of the tray for transporting articles of the present invention. The perspective view which shows the usage of the article transport tray of this invention. An exploded perspective view of the vicinity of the peripheral edge of the opening of the tray body of the tray for transporting articles of the present invention.

Hereinafter, specific examples of the tray for transporting articles of the present invention will be described with reference to the accompanying drawings. The article transport tray T according to the embodiment of the present invention has a recess T1 for immersing and accommodating an article A having a flange F protruding on the peripheral side, and an article A on the peripheral edge of the opening 6 of the recess T1. It is made of synthetic resin and has a flange receiving portion 10 for suspending the article A with the protruding flange F. Here, assuming an article A which is a heavy object having a flange F projecting on the peripheral side as the article A to be accommodated, an article transport tray T provided with three recesses T1 for accommodating the article A is taken as an example. There is.

In the present embodiment, the above-mentioned article transport tray T is divided into a tray bottom 1 in which the bottom 2 in the recess T1 is recessed and a tray body 5 in which the opening 6 in the recess T1 is penetrated. To. In other words, the recess T1 provided in the goods transport tray T is provided by the tray bottom portion 1, the bottom portion 2 of the tray body portion 5, and the opening portion 6. Further, the tray bottom 1 and the tray body 5 constituting the article transport tray T are made of a synthetic resin which is formed into a hollow shape by blow molding using a thermoplastic resin. That is, the tray bottom portion 1 and the tray body portion 5 are formed in a hollow shape by a synthetic resin material that can be molded by blow molding.

More specifically, the blow molding is performed by extruding a thermoplastic resin material softened by heat into a pipe shape and blowing compressed air into the pipe-shaped resin while the resin is soft. This is a molding method for a synthetic resin material, which is formed by pressing the resin against a mold, cooling the resin, and solidifying the resin. Although HD-PE is used here as the thermoplastic resin material for obtaining the above synthetic resin, it is of course not limited to this as long as it is a resin material that can be molded by blow molding. .. Further, as another example of the synthetic resin material that can be molded by blow molding, there are widely used thermoplastic resin materials such as acrylic resin, polycarbonate resin, polyethylene terephthalate (PET) resin, and the like.

The tray bottom 1 and the tray body 5 are each formed to be hollow so that each of them has a housing shape surrounded by six wall surfaces. Since there is an annular wall surface constituting the penetrating opening 6, it is possible to obtain sufficient strength even when a thermoplastic resin having a strength lower than that of ABS is used.

Here, the flange receiving portion 10 is composed of a separate member made of a molded elastomer, and is joined to the peripheral edge of the opening 6 of the tray body portion 5. This elastomer is a polymer resin material having elasticity, and it is particularly preferable to use an elastomer material that can be molded into a complicated shape by injection molding by heating, for example, a thermoplastic elastomer. Further, the flange receiving portion 10 is not limited to the elastomer as long as it is molded into its shape, and is made of a synthetic resin constituting the tray bottom portion 1 and the tray body portion 5, specifically, a material different from HD-PE. May be. As shown in FIG. 3, the flange receiving portion 10 has a configuration in which a recessed portion 11 for receiving a flange F projecting from the peripheral side of the article A is recessed on the upper surface of a square block-shaped main body. The lower part is fitted and joined to the notch 8 on the upper surface of the annular step portion 7 projecting from the inner circumference of the opening 6 of the body portion 5.

Further, as shown in FIG. 3, here, when a plurality of the flange receiving portions 10 are injection-molded at the same time, the runner 12 formed between the plurality of flange receiving portions 10 is left, and the flange receiving portion 10 is cut out 8 above. The runner 12 portion is simultaneously fitted into the groove 9 recessed in the upper surface of the annular step portion 7 provided between the notches 8 to realize reliable fixing. Here, an example in which the runners 12 are left between the pair of flange receiving portions 10 has been described, but the runners 12 are located between the flange receiving portions 10 adjacent to the three or more flange receiving portions 10. May be adopted, and a groove 9 may be provided on the upper surface of the step portion 7 corresponding to each of the positions where the runner 12 is left.

Here, when the tray body 5 is blow-molded, the elastomer flange receiving portion 10 and the runner 12 are set in the notch 8 and the groove 9 of the mold and insert-molded to serve as a joining means. ..

The tray bottom 1 and the tray body 5 are integrated by aligning the positions of the bottom 2 and the opening 6 and joining them to form a tray T for transporting articles.

A rivet (not shown) is used here as a means for joining the tray bottom portion 1 and the tray body portion 5. Reference numeral 3 in the figure is a through hole of the rivet provided above the bottom of the tray 1, and reference numeral 4 in the figure is a tool insertion groove provided below the through hole. Two types of rivets, resin rivets and metal rivets, are generally used, but any of them may be used. The advantages of joining with rivets are that it is cheap, durable, and looks good. The joining means between the tray bottom portion 1 and the tray body portion 5 is not limited to joining by rivets, but is not limited to joining by rivets, such as screwing, heat welding, or ultrasonic welding, which are known joining means for tray members made of synthetic resin. It is also possible to select the joining means.

Subsequently, the operation and effect obtained by the article transport tray T of the embodiment described above will be described. In the article transport tray T of the present embodiment, blow molding is used as the molding method instead of vacuum forming. On the other hand, conventionally, it has been considered that sufficient strength cannot be obtained as it is because blow molding cannot use ABS as a resin material to be used unlike vacuum forming, and HD-PE is used, for example. ..

Regarding the above, in the present embodiment, there is a recess T1 for immersing and accommodating the article A having a flange F protruding on the peripheral side, and a flange F protruding from the article A on the peripheral edge of the opening 6 of the recess T1. Instead of integrally molding the synthetic resin article transport tray T having the flange receiving portion 10 for suspending the article, the article transport tray T is formed in the tray bottom 1 and the recess in which the bottom 2 in the recess T1 is recessed. The tray body portion 5 is divided into a tray body portion 5 through which the opening portion of the tray is formed. Then, each of the tray bottom 1 and the tray body 5 is formed into a hollow shape by blow molding using a thermoplastic resin material, and the molded tray bottom 1 and the tray body 5 are joined to convey one article. It is a tray T.

In the above, each tray bottom 1 and tray body 5 constituting the article transport tray T are formed in a hollow shape, which means that each of them is formed in a housing shape surrounded by six surfaces. do. As a result, it is possible to obtain sufficient strength even when a thermoplastic resin material such as HD-PE, which is inferior in strength to ABS, is used. That is, by molding a synthetic resin material that has the strength required for transporting the article transport tray T for transporting heavy objects and also includes materials other than those made of ABS by vacuum forming, which are relatively inferior in strength. It will be possible to realize. That is, if it is a synthetic resin material that can be molded by blow molding, it is possible to select from a variety of relatively general synthetic resin materials as exemplified above, and selection and procurement of the synthetic resin material to be used. Becomes easier. Further, for example, it is possible to select a synthetic resin material superior to ABS in other features, such as being inferior in strength to ABS but being obtained at low cost.

Further, since the article transport tray T is obtained by molding with a synthetic resin, it is possible to provide an inner wall along a relatively complicated outer shape like the article A having a flange F protruding on the peripheral side.

Further, by using HD-PE as the synthetic resin material constituting the tray bottom 1 and the tray body 5 of the tray T for transporting goods, the light resistance is higher than that of ABS, and the rigidity is further increased, so that the tray is cracked due to impact. A tray with less occurrence of is realized. That is, a tray with high impact resistance is realized.

Further, regarding the flange receiving portion 10, the flange receiving portion 10 is formed of a molded elastomer which is a material different from the synthetic resin constituting the tray bottom portion 1 and the tray body portion 5, and further, the peripheral edge of the opening 6 of the tray body portion 5 is formed. The elastomer flange receiving portion 10 obtained by injection molding is fitted into the flange receiving portion 10 when the tray bottom 1 and the tray body 5 are formed by blow molding using a thermoplastic resin. By setting it in a mold engraved with a notch and performing insert molding, it is possible to prevent the molding resin from being exposed and the flange F of the article A from slipping and being unable to be fixed, and the hardness of the elastomer is low. By the action of the elastically deformable feature, the force for absorbing the impact applied by the shaking or the vibration from the outside works, and the damage to the article A can be prevented.

Further, when a plurality of elastomer flange receiving portions 10 are injection-molded at the same time, a blow mold in which a runner groove is carved is used while leaving a runner 12 formed between the flange receiving portions 10. Therefore, when the flange receiving portion 10 is fitted into the notch 8 of the flange receiving portion 10, the runner 12 is simultaneously fitted into the groove 9 recessed in the upper surface of the step portion 7, so that the individual flange receiving portions 10 are fitted. It becomes difficult for the molded product of No. 1 to fall off from the notch 8. As a result, the flange receiving portion 10 is securely fixed to the tray body portion 5 in the article transport tray T.

Further, the article transport tray T is provided with three recesses T1 for accommodating the article A, and the article A to be transported or accommodated by the article transport tray T is a heavy object. Therefore, for example, assuming that the weight of each item is 20 kg or more, the article transport tray T holds at least three articles A, which are the heavy items. That is, the total weight of the article A to be held is 60 kg or more, and the load cannot be supported by a general blow-molded tray. However, in the article transport tray T of the present embodiment, in a configuration in which three recesses T1 for accommodating the article A are provided, the tray bottom portion 1 and the tray body portion 5 are divided into upper and lower parts, and further separated members. By adopting the tray structure provided with the flange receiving portion 10, the force received by the flange receiving portion 10 and its vicinity can be dispersed, and the load can be supported by a material other than ABS. Further, even if the recesses T1 are provided in more than three places, the total weight held by the article transport tray T will be further increased, but the action of dispersing the force received by the flange receiving portion 10 and its vicinity. Is obtained in the same manner, so that the configuration of the article transport tray T is effective.

In the embodiment described above, the case where the article A to be transported or accommodated by the article transport tray T is a heavy object having the flange F projected is exemplified and described. For example, in the case of a motor housing or a motor product, which is an example of a heavy object having a flange F protruding from the article A, a portion other than the flange F portion of the article A is in contact with an impact or another member. If the article A is held by a portion other than the flange F portion by the tray, there is a concern that the housing portion of the motor and the motor product may be damaged. Therefore, the configuration using the recess T1 for immersing and accommodating the article by the article transport tray T of the present embodiment and the flange receiving portion 10 is more suitable for transporting the housing portion of the motor and the motor product. The configuration is as follows.

T Tray for transporting goods T1 Recessed A Goods F Flange 1 Tray bottom 2 Bottom 3 Through hole 5 Tray body 6 Opening 7 Steps 8 Notch 9 Groove 10 Flange receiving part 11 Recessed part 12 Runner

Claims (7)

In an article transport tray for transporting articles with a flange protruding on the peripheral side,
It has a recess for immersing and accommodating the article, and a flange receiving portion for suspending the article with the flange on the peripheral edge of the opening of the recess.
The recess is provided by a tray bottom having a recessed bottom in the recess and a tray body through which an opening in the recess is formed.
The tray for transporting goods is characterized in that the bottom of the tray and the body of the tray are formed in a hollow shape by a synthetic resin material that can be molded by blow molding, and are joined and integrated. The article transport tray according to claim 1, wherein high-density polyethylene is used as the synthetic resin material. The article transport tray according to claim 1 or 2, wherein the flange receiving portion is made of a molded elastomer and is joined to the peripheral edge of the opening of the tray body portion. The article transport tray according to any one of claims 1 to 3, wherein the recesses are provided in at least three places. In a method for manufacturing an article transport tray for transporting an article having a flange protruding on the peripheral side.
The article transport tray has a recess for immersing and accommodating the article, and a flange receiving portion for suspending the article with the flange on the peripheral edge of the opening of the recess, and the recesses are separated from each other. It is provided by the tray bottom portion in which the bottom portion in the recessed portion is recessed and the tray body portion in which the opening portion in the recessed portion is formed.
In manufacturing the article transport tray, each of the tray bottom and the tray body is obtained by forming a synthetic resin into a hollow shape by blow molding using a thermoplastic resin material, and the blow molding is performed. At that time, the elastomer flange receiving portion obtained by injection molding is set in a mold engraved with a notch into which the flange receiving portion is fitted and insert molded, and then the bottom of the tray and the body of the tray are joined. A method for manufacturing a tray for transporting goods, which comprises the above. The method for manufacturing a tray for transporting articles according to claim 5, wherein high-density polyethylene is used as the thermoplastic resin material. Claims to use a blow die in which a runner formed between the plurality of flange receiving portions is left when a plurality of the flange receiving portions are injection-molded at the same time, and a runner groove is also engraved in the insert molding. 5 or the method for manufacturing an article transport tray according to claim 6.

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