JPH0136732Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a portable case, specifically, a portable case having a hollow double wall structure manufactured by a blow molding method for housing equipment such as typewriters, measuring instruments, musical instruments, etc. Regarding the case.

Such a carrying case cannot avoid colliding with other objects or falling when carried, and prevents damage to stored equipment such as typewriters, measuring instruments, musical instruments, etc. due to impact caused by colliding with other objects or falling. For this purpose, a so-called hollow double wall structure having a space between an inner wall and an outer wall is used.

However, the hollow 2
Even in portable cases that have a heavy-walled structure, devices stored inside the case are frequently damaged during collisions or falls.

Even with such a hollow double-walled structure, as a result of intensive research, we found out whether the cause of damage to devices stored inside the device is due to the fact that it is portable, so the inner wall is included to make it convenient for carrying. The outer wall is made as thin as possible, and as a result, there is no problem when no equipment is stored in the case, but when equipment is stored in the case, the weight increases, so it can be easily damaged by shocks such as when dropped. It turned out that the cause was that the outer wall collided with the inner wall despite the existence of a concave space.

Based on the identified causes, it is possible to directly increase the thickness of the outer wall, but as mentioned above, this not only makes the case heavier, which is disadvantageous for carrying, but also increases the cost of materials, making the outer wall thicker. It is conceivable to leave a large space between the outer wall and the inner wall so that even if the case dents, it will not collide with the inner wall, but the overall volume of the case will be large compared to the device to be stored, which will not only be disadvantageous for carrying, but also The outer wall has a large area, and as in the case described above, there is a disadvantage that the material cost is large and expensive.

These drawbacks, namely, that the case itself is heavy, bulky, and expensive, are fatal defects for a portable case. It is an object of the present invention to provide a portable case that has a sufficient function of preventing damage to stored items, that is, a buffering function, which a double wall structure should originally have.

The present invention is a hollow double wall formed by blow molding into a box shape with one side open, consisting of a bottom wall and a circumferential wall, and the bottom wall and the circumferential wall having a space between an inner wall 5 and an outer wall 7. In the portable cases 1 and 2 formed in this structure, a concave groove in the inner wall 5 of the cases 1 and 2 extends from at least a part of the bottom wall to the open end of the peripheral side wall portion, including a corner continuous to the bottom wall. It is characterized in that a plurality of shaped ribs 6 are provided, and the back side of each rib 6 located at the corner is welded to the back side of the outer wall 7.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In the figure, 1 is a case on the main body side, and 2 is a case on the lid body side. These are molded by blow molding, and are formed into a box shape consisting of a bottom wall and a peripheral side wall with one side open. The bottom wall and the peripheral wall are the inner wall 5
It has a hollow double wall structure with a space between the outer wall 7 and the outer wall 7. One side edges of both cases 1 and 2 are connected to each other by a hinge member 3 so as to be openable, and the other side edges facing the hinge member 3 are connected to each other by a hinge member 3.
By engaging the latch member 4 with the protrusions protruding from this portion, the latch member 4 is removably locked. In this embodiment, both cases 1 and 2 are shown as separate bodies, but both cases 1 and 2 may have their parisons partially compressed and thinned during blow molding, and a bendable hinge may be integrally molded. . FIG. 8 shows a state in which both cases 1 and 2 are connected at a hinge portion.

Both cases 1 and 2 are for storing equipment such as a typewriter, a measuring instrument, etc., and extend from at least a part of the bottom wall of each inner wall 5 to the open end including a corner connected to the bottom wall. A plurality of groove-shaped ribs 6 are provided for reinforcement. In this rib 6, the bottom surface of the groove formed on the circumferential side of the cases 1 and 2 is inclined so that the mold can be easily removed, or at least at an angle along the drawing direction of the mold. ing.

A part of the back surface of this rib 6, that is,
The back side located at the corner is the outer wall 7 of the cases 1 and 2.
It is welded to the back side. Further, as shown in FIG. 9, the ribs 6 are made gradually shallower toward the open ends on the peripheral side surfaces of the cases 1 and 2, so that the depth becomes zero at the open ends. Good too.

The corners of the outer walls 7 of the cases 1 and 2 are chamfered, and the corners of the inner walls 5 are welded to the back sides of these corners.

Thus, the inner wall peripheral side portions of the case 2 on the main body side and the case 2 on the lid side are reinforced by the ribs 6. Also, the back side of the rib 6 located at the corner is only welded to the back side of the outer wall 7, and the other parts are spaced apart from the back side of the outer wall 7. When the cases 1 and 2 are stored, the inner walls 5 of the cases 1 and 2 are elastically deformed by their weight, thereby buffering the impact force at this time, thereby protecting the stored items such as typewriters and other equipment from the impact.

The present invention is a hollow double wall formed by blow molding into a box shape with one side open, consisting of a bottom wall and a circumferential wall, and the bottom wall and the circumferential wall having a space between an inner wall 5 and an outer wall 7. In the portable cases 1 and 2 formed in this structure, the inner wall 5 of the cases 1 and 2 has a concave groove-like rib 6 extending from at least a part of the bottom wall to the open end including a corner continuous to the bottom wall. Since a plurality of ribs 6 are provided and the back side located at the corner of each rib 6 is welded to the back side of the outer wall 7, the inner wall 5 and the outer wall 7 are welded at the back side located at the corner of each rib 6, Most of the other parts are spaced apart from each other, and can provide a sufficient buffering function for the equipment housed within the inner wall 5. In particular, the welding of the inner and outer walls 5 and 7 is done at the corners. Therefore, the vertical, horizontal, or diagonal impact force received by the equipment housed in the inner wall 5 due to a fall or collision of the case is absorbed by the bottom, side, or bottom portion of the inner wall 5, which has a buffering function, respectively. The bottom part and the side parts fully exhibit the receiving and buffering function, and the reduction in the buffering function due to the integration of the outer wall 7 and the inner wall 5 due to welding on the back side located at the corner of each rib 6 is kept to the necessary minimum. It is also useful for improving the strength of corners where collisions are likely to occur. Furthermore, the inner wall 5 and the outer wall 7 are
The back side located at the corner of each rib of the inner wall 5 and the outer wall 7 are partially integrated by welding, so that the thickness of the outer wall 7 can be reduced while fully exerting the buffering function as described above. , inner/outer walls 5, 7
Although the space between them is the same as before, the strength is improved, and the case itself does not become heavy or bulky, or the material cost increases, making it more expensive. It is extremely useful as a case. Moreover, the rib 6 is the case 1,
Since the ribs 6 are provided so as to extend to the open end including the corner connected to the bottom wall of the cases 1 and 2, there is no problem in molding the ribs 6 even if the mold is integrated with the mold for molding the inner surfaces of the cases 1 and 2. It also has the advantage of being moldable.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the container on the main body side, and FIG.
3 is a sectional view taken along the - line in FIG. 1, FIG. 4 is a sectional view taken along the - line in FIG. 1, FIG. 5 is a plan view of the container on the lid side, and FIG. The figure is a sectional view taken along the - line in Fig. 5, Fig. 7 is a sectional view taken along the - line in Fig. 5, Fig. 8 is a perspective view showing the lid side of the container in an open state, and Fig. 9 is a sectional view taken along the - line in Fig. 5. FIG. 2 is a sectional view showing the main parts of the embodiment. 1 and 2 are the case, 5 is the inner wall, 6 is the rib, and 7 is the outer wall.

Claims (1)

[Claims for Utility Model Registration] By blow molding, it is formed into a box shape with one side open, consisting of a bottom wall and a peripheral side wall, and the bottom wall and the peripheral side wall have a space between the inner wall 5 and the outer wall 7. In the portable cases 1 and 2 formed in a hollow double wall structure, the open end of the peripheral side wall portion of the inner wall 5 of the cases 1 and 2 includes at least a part of the bottom wall and a corner continuous to the bottom wall. A plurality of groove-shaped ribs 6 are provided, and the back side of each rib 6 located at the corner is
A portable case characterized by being welded to the back side of the outer wall 7.