JP2007131303A - Plastic-made container for carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic-made container for carriage having the upper surface of a bottom wall to be easily worn when carrying a content such as a heavy ring gear having a pointed tooth tip therearound which facilitates the recognition of the lifetime and the necessary changing timing and prevents any dangerous accident from occurring by the breakage of the bottom wall. <P>SOLUTION: The plastic-made container for carriage keeps a bottom wall 5 for receiving and supporting the content shaped in a raised bottom, and non-through recesses 9a, 9b which are recessed from a lower side locally located in the bottom wall. When an upper surface of the bottom wall is worn, the recess becomes a through hole and appears from the upper surface. The upper surface of the bottom wall 5 is formed in an arc-shaped surface copying the outside diameter of a ring gear 10 as the content. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a transporting plastic container for storing articles such as ring gears.

The transportation container for an automobile mission shown in the following Patent Document 1 is provided with a pair of projecting portions facing the upper surface of the bottom plate, and the movement of the automobile mission is regulated by the projecting portions, thereby suppressing rattling during transportation. It was made to do.
Also, Patent Documents 2 and 3 below disclose that the required replacement time of a worn tire can be clearly understood by showing the color by making the inner color of the automobile tire different by paint or the like. ing.
Japanese Patent No. 3446072 JP-A-8-258517 JP-A-5-246217

  By the way, the ring gear, which is a part of an automobile transmission or the like, has a sharp tooth profile formed on the outer periphery thereof, so that a plastic container used when transporting to an assembly factory or the like is scraped in a short time by the tooth tip. There was a fear. Conventionally, such a problem is dealt with by providing means for making the ring gear, which is the contents, immovable as shown in Patent Document 1, that is, fixing means for suppressing backlash of the contents being transported. Was. However, since the hardness difference between the steel material and the plastic that make up the ring gear is significant, the plastic is scraped and worn by the sharp tooth profile of the ring gear during transportation even if the rattling is suppressed, and it is used as it is. In some cases, the container may be damaged, causing the contents to fall off, causing damage to the contents or damage to the transport line.

  The present invention solves the above-mentioned problems, and the plastic container for transport according to claim 1 has a bottom wall for receiving the contents and forms a bottom, and a non-penetrating recess recessed from the lower surface is formed on the bottom wall. By forming locally, when the upper surface of the bottom wall is worn, the recess becomes a through hole and appears on the upper surface.

The invention described in claim 2 is characterized in that, in the transporting plastic container, the upper surface of the bottom wall is formed in a circular arc shape following the outer diameter of the ring gear as the contents.
Further, in the plastic container for carrying a ring gear according to claim 3, at least two arc-shaped receiving surfaces with different curvature radii are formed on the bottom wall so as to follow the outer diameter of each ring gear. A receiving surface having a small curvature is formed in the middle, and receiving surfaces having a relatively large curvature radius are arranged in series on both outer sides thereof.

  According to the first aspect of the present invention, the lifetime of the plastic container and the required replacement time can be easily understood by anyone, and it is possible to prevent a dangerous accident due to breakage of the bottom wall.

Since the plastic container for transport described in claim 2 receives and supports the outer periphery of the ring gear evenly by the arc-shaped bottom wall, the impact caused by the load and vibration of the ring gear is dispersed, and the wear rate of the bottom wall is reduced. Reduce.
According to the third aspect of the present invention, the carrying plastic container can equally receive and support the ring gears having different outer diameters by the arc-shaped bottom wall. Therefore, the ring gear is stably supported, and even if the tooth tip of the ring gear wears the receiving surface due to vibration during transportation, the degree can be reduced.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of a plastic container for transportation according to the present invention, FIG. 2 is a perspective view of the back surface thereof, FIG. 3 is a longitudinal sectional view of the plastic container of FIG. 1, and FIG. It is a surface notch perspective view. This plastic container is formed in a square box shape by four side walls 1a to 1d, and flanges 2a to 2c and vertical ribs 2d are integrally formed on the outer peripheral surface for reinforcement. A partition wall 3 is integrally formed in the container in a vertical shape, and two storage spaces 4a and 4b are formed by the partition wall 3. Then, by raising the inner bottom surface of each storage space in a trapezoidal shape, the arc-shaped bottom wall 5 that follows the outer diameter of the ring gear 10 as the contents is raised and integrally formed in the bottom shape. As shown in FIG. 3, the bottom wall 5 is formed with a receiving surface 7a having a small curvature radius circumscribing the virtual small-diameter circle 6a in the middle, and a receiving surface 7b having a large curvature radius circumscribing the virtual large-diameter circle 6b. A series of pairs are provided on both outer sides of the receiving surface 7a. Reference numeral 8 denotes a groove formed in the middle of the receiving surface 7a in a direction perpendicular to the arc.

  The bottom wall 5 is generally thicker than the other parts of the container. And the non-penetrating hollow 9a, 9b dented from the lower surface is locally formed in the lower surface of the bottom wall 5, respectively. One recess 9a is formed so as to correspond to the lower surface of the receiving surface 7a, and the recess 9b is formed so as to correspond to the lower surface of the receiving surface 7b. In this embodiment, each recess is a half which is long in the direction perpendicular to the arc. It is formed in a circular groove shape.

  In the plastic container configured as described above, as shown in FIG. 5, the ring gear 10 having the same outer diameter as the virtual small-diameter circle 6a is supported on the bottom wall 5, so that a plurality of tooth tips on the outer periphery of the ring gear can be obtained. Abuts against the receiving surface 7a so that the load of the ring gear is evenly supported and stably supported by the receiving surface 7a, and the impact caused by vibration during transportation is dispersed. Even if the tip wears the receiving surface 7a, the speed can be reduced. When a ring gear having the same outer diameter as the virtual small-diameter circle 6b is supported on the bottom wall 5, a plurality of tooth tips on the outer periphery of the ring gear abut against the receiving surface 7b, and the load of the ring gear is evenly distributed by the receiving surface 7b. Therefore, the wear of the receiving surface 7b can be reduced. Since the bottom wall 5 is formed in a raised bottom shape, there is no fear that the lower surface will be worn by use, and only the upper surface is worn by contact with the contents.

  Further, by repeatedly using this plastic container to carry the ring gear, when the receiving surface 7a or 7b is worn, the recess 9a or 9b becomes a through hole and appears on the upper surface. For this reason, the degree of wear of the bottom wall 5 can be clearly recognized, and the life of the container and the required replacement time can be easily understood by anyone, so that the bottom wall 5 is suddenly affected by the weight of the ring gear. Therefore, it is possible to prevent dangerous accidents such as damage to the contents, dropping off and damaging the contents or damaging the transport line.

  In addition, the plastic container of the present invention can be manufactured only by forming a recess of an appropriate size on the lower surface of the bottom wall, and can be manufactured by modifying a part of an existing molding die. Since there is no need for a special manufacturing method that indicates the tire replacement time, it is possible to easily provide the above-mentioned index of life without any cost in manufacturing.

In addition, since this plastic container has two arc-shaped receiving surfaces with different radii of curvature formed on the bottom wall of one storage space, it can equally receive and support two types of ring gears with different outer diameters. For this reason, the versatility as a container increases and the lifetime of the container itself can also be improved by always using it appropriately.
In addition, since oil such as cutting oil attached to a product such as a ring gear flows into the groove 8, the groove 8 is provided, so that the oil can be prevented from adhering to the product again.

  In this embodiment, the recesses 9a and 9b are formed in a semicircular groove shape. However, in the present invention, the recesses are not necessarily formed in such a shape. A round hole may be formed. Thus, the present invention is not limited to the shape shown in this embodiment, and various design changes are possible.

The external appearance perspective view of the plastic container for conveyance which shows embodiment of this invention. The perspective view of the back surface of the plastic container for conveyance of FIG. The longitudinal cross-sectional view of the plastic container for conveyance of FIG. The cross-sectional notch perspective view of the plastic container for conveyance of FIG. The longitudinal cross-section notch perspective view of the plastic container for conveyance of FIG.

Explanation of symbols

5 Bottom wall 7a, 7b Receiving surface 9a, 9b Recess 10 Ring gear

Claims (3)

  The bottom wall that supports the contents is raised and formed into a bottom shape, and a non-penetrating recess that is recessed from the lower surface is locally formed on the bottom wall, so that when the upper surface of the bottom wall is worn, the recess becomes a through hole. A plastic container for transportation characterized by appearing on the upper surface.   The plastic container for transportation according to claim 1, wherein the upper surface of the bottom wall is formed in a circular arc shape that follows the outer diameter of the ring gear as the contents.   At least two arc-shaped receiving surfaces with different curvature radii are formed on the bottom wall so as to follow the outer diameter of each ring gear, and a receiving surface with a relatively small curvature radius is formed in the middle and relative to both outer sides. A plastic container for carrying a ring gear, characterized by comprising a series of receiving surfaces having a large curvature radius.

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