JPH0246726Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a device that can be pushed into the inside of a shoe to preserve its shape when displaying and selling shoes or storing shoes when not in use. This relates to the shape-retaining device used.

[Conventional technology and its problems] Traditionally, cardboard was curved into a horseshoe shape and pushed inside the shoe as a shape-retaining tool for shoes, but this method did not have sufficient shape-retaining properties or durability. In recent years, as shown in FIG. 9, a hollow bag 20 made of blow molded synthetic resin has been used, and this bag 20 is pushed into the inside of the shoe B so that the shape of the shoe is maintained by its elastic force. However, if the hollow bag 20 has a hole, it will not function as a shape retainer at all, and it also has the drawbacks that it is too elastic, making it difficult to push in, and the elasticity makes it easy to pull out from the inside of the upper of the shoe. be.

In view of the above, the present invention aims to provide a shoe shape retaining device that can be curved into a horseshoe shape with a single touch operation, is easy to push into the shoe, and has an extremely excellent shape retaining effect. It is.

[Means for Solving the Problems] The shape-retaining device of the present invention that solves the above-mentioned problems is made of a relatively stiff sheet material mainly composed of a hard synthetic resin foam sheet, and is shaped into a substantially circular shape that is symmetrical in plane. On one side thereof, a pressed groove extending in a substantially hyperbolic shape symmetrical about the axis is formed on one end side in the direction of the axis of symmetry, and the groove is surrounded by the groove. One end side part is a folded part, the other part outside the folded groove is a main part, and it extends from the vicinity of the center of the substantially hyperbolic folded groove to the other end side in the symmetrical axis direction at a required interval left and right. At least two concave grooves are formed, and on the other side, two symmetrical pressure grooves are formed extending from near the center of the substantially hyperbolic folded groove in the direction of the axis of symmetry within the folded part. , the folding portion can be folded inside the main body due to the curvature of the main body.

[Function] In the shape retaining device of the present invention having the above configuration, if the left and right parts of the main body part are pressed from both sides with the side with the substantially hyperbolic folded groove facing downward, a symmetrical shape is created in the folded part. Since two pressed fold grooves extending along the axis are provided on the other side, the folded part is bent from the substantially hyperbolic fold groove to the lower surface side, and the central piece has two fold grooves. The main body part is folded into the inside of the main body part from the folded groove part, and the main body part, which is simultaneously pressed from both sides, is curved into a horseshoe-shaped cross section as a whole by the concave groove extending from the vicinity of the central part of the arc shape of the substantially hyperbolic folded groove. At this time, the central piece of the folded part plays the role of supporting the left and right parts of the main body, and the continuity between the left and right parts of the folded part and the main body provides excellent outward restoring force, and these things work together. Therefore, it exhibits sufficient shape retention against external pressure.

[Example] Next, an example of the present invention will be described based on the drawings.

(A) shows a shape-retaining device according to the present invention, which is formed into a substantially circular shape with horizontal symmetry in a plane from a relatively stiff sheet material mainly made of a hard synthetic resin foam sheet. The substantially circular shape mentioned in the present invention can be implemented in various shapes, such as a rectangular shape such as a trapezoid with rounded corners, but in practice, it can be implemented in a substantially fan shape as shown in the figure. It is particularly desirable to form a deformed circular shape in which one end of the axis of symmetry is slightly narrower in order to push it into the inside of the shoe.

The shape retaining tool (A) has the following configuration. On one side, which is inward in use, there is a symmetrical substantially hyperbola that expands in the direction of the one end side with the main wide end side portion of the left and right parts 1a, 1b in the direction of the axis of symmetry C-C. A folded groove 2 having a substantially V-shaped cross section is provided by pressing the folded groove 2 extending in a shape, and one end side portion surrounded by the folded groove 2 is used as a folded part 3, and the other part outside the folded groove 2 is used as a main body part 4. It is sectioned. Further, within the main body portion 4, a plurality of grooves 5 extending from near the arc-shaped central portion of the groove 2 toward the other end are provided at required intervals laterally. This groove 5 may have only two symmetrical grooves, but in the case of the figure, there are five grooves 5.
are formed such that they are spaced wider toward the other end, forming a radial pattern with respect to the central part of the groove 2, and together with the arc shape of the central part of the substantially hyperbolic groove 2, the main body part 4
It can be easily curved into a horseshoe shape.

In addition, on the other side, within the folded part 3 surrounded by the folded groove 2, the other edge side in the direction of the symmetrical axis is spaced from the vicinity of the arc-shaped center of the hyperbolic folded groove 2 to the left and right at a required interval. Folded grooves 6, 6 having a substantially V-shaped cross section are formed by pressing two symmetrical strips extending to the left and right sides, and the folded portion 3 is bent inside the main body 4 by the curving action caused by the pinching pressure from both sides of the main body 4. In particular, the central piece 3a between the grooves 6, 6 is folded into the main body 4 at a substantially right angle. 3
b and 3b indicate the left and right pieces of the folded portion 3.

In the case of the illustrated embodiment, also in the other end side portion of the main body portion 4 in the direction of the axis of symmetry C-C,
On the same side as the fold groove 2, there is formed a symmetrical, slightly small, substantially hyperbolic fold groove 7 by pressing that can expand in the opposite direction to the fold groove 2, and is surrounded by the fold groove 7. The folded part 8 is formed as a folded part 8, and two folded grooves 9, 9 are formed on the other side of the folded part 8, extending from near the arc-shaped center of the folded groove 7 along the axis of symmetry. The folded portion 8 is folded into the folded portion 3 according to the bending action of the main body portion 4.
Similarly, it is designed to be folded inside the main body portion 4. In this case, the center piece 8a of the folded portion 8 serves as a support for the main body portion 4, further improving the shape-retaining force, so this is preferable in practice. 8b,8
b indicates the left and right pieces of the folded portion 8.

10 in the figure is a reinforcing convex part provided on the center piece 3a of the folding part 3, and 11 and 12 are provided on the left and right pieces 3b, 3b of the folding part 3 and the corresponding parts of the main body part 4. The main body portion 4 is a convex portion, and is provided so that when the main body portion 4 is curved, both convex portions 11 and 12 come into relative contact with each other and maintain elasticity in the restoration direction. Only one of the protrusions 11 and 12 may be provided.

In addition, as a relatively stiff sheet material mainly composed of a hard synthetic resin foam sheet, styrene resin such as polystyrene and a copolymer mainly composed of styrene can be used as shown in the examples shown in FIGS. 1 to 6. In addition to the case where a foam sheet or other hard synthetic resin foam sheet a is used as a raccoon, as in the embodiment shown in FIG. 7, polyethylene, polyethylene,
This method can be implemented by constructing the foamed sheet b of an olefin resin such as polypropylene or other soft synthetic resin in the same manner as described above using a sheet material with a two-layer structure laminated on the side that becomes the outer surface when in a particularly curved state of use. In this case, the strength of the bent portions formed by the respective folding grooves 2, 6, and 7 can be increased, and the flexibility of the foamed sheet b provides a good contact feeling with the inner surface of the shoe, and also serves as a non-slip member. be able to.
The foamed sheet having a thickness of about 0.5 to 3.0 mm and a foaming ratio of about 5 to 15 times is preferably used.

The shape-retaining device A of the present invention having the above-mentioned structure is kept unfolded as shown in Fig. 1 when not in use, and when used by being pushed into the inside of the shoe B, as shown in Fig. 4. When the main body part 4 is pressed from both sides and curved into a horseshoe shape, the substantially hyperbolic groove 2 provided on one side and the two grooves 6 in the folded part 3 are pressed, respectively. Then, the folded part 3 is bent as shown in FIG. state, and at this time, the main body part 4
Although the material is made of a stiff sheet material due to the arc shape of the central part of the folded groove 2 and the flexibility due to the at least two grooves 5 extending from the vicinity of the central part to the other end side in the direction of the axis of symmetry, The main body part 4 can be bent without fear of cracking and curved into a substantially hyperbolic cross section, and the main body part 4 is supported by the central piece 3a and elastic restoring force due to continuity with the main body part 4. is held in the predetermined curved state without being further curved. Therefore, if this is pushed into the inside of the shoe B as shown in FIG. It supports the outer skin of the shoe, prevents deformation such as dents due to external pressure, and exhibits excellent shape retention.

In particular, as in the illustrated embodiment, when the folded part 8 with the substantially hyperbolic groove 7 is also provided on the other end side, the pushed end side is also supported from the inside by the central piece 8a of the folded part 8. and exhibits even better shape retention.

[Effects of the invention] As mentioned above, the shape retaining device of the present invention can be kept in a flat and low-bulk state until use, and when used, it can be bent into a horseshoe shape with a single touch, and it can be pushed into the inside of a shoe. It is easy to use and handle, and since the folding part automatically folds into the inside of the main body by applying pressure from both sides, and this serves as a support, it has excellent pressure resistance and has a large restoring force, making it extremely excellent. It exhibits shape-retaining properties and makes shoes retain their shape well. Furthermore, since the material is made of a relatively stiff sheet material mainly composed of hard synthetic resin foam sheets, it has excellent elasticity.
This protects the shoes well without damaging the inside of the shoes.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a perspective view of the back side of the same, Fig. 3 is a sectional view taken along the front line - Fig. 4 and Fig. 5 are operations for curving into a horseshoe shape. FIG. 6 is a sectional view taken along the front line, FIG. 7 is a partially cutaway perspective view showing another embodiment, and FIG. 8 is a sectional view of the shoe inserted into the shoe. FIG. 9 is a sectional view of a conventional shape retaining device in a state of use. A...Shape retainer, 2,7...Substantially hyperbolic groove,
3, 8... Folded part, 4... Main body part, 5... Concave groove, 6, 6, 9, 9... Folded groove, 3a, 8a... Central piece.

Claims (1)

[Claims for Utility Model Registration] 1. A relatively stiff sheet material mainly composed of a hard synthetic resin foam sheet is formed into a substantially circular shape that is bilaterally symmetrical in a plane, and one side of the sheet is formed in the direction of the axis of symmetry. A folded groove is formed by pressing and extends in a substantially hyperbolic shape symmetrical about the axis at one end side, and the one end side surrounded by the folded groove is the folded part, and the other part outside the folded groove is the main body. At least two concave grooves extending from the vicinity of the center of the substantially hyperbolic groove to the other end in the direction of the axis of symmetry are formed at a required interval from side to side, and on the other side. , forming a folded groove by pressing two symmetrical grooves extending along the axis of symmetry from near the center of the substantially hyperbolic folded groove within the folded part, and by curving the main body part, the folded part is moved inside the main body part. A shoe shape-retaining device characterized by being foldable. 2 A folded groove is formed on the other end side edge in the direction of the axis of symmetry, and a folded groove extending in a substantially hyperbolic shape that expands in the opposite direction to the above-mentioned folded groove is formed, and a folded groove is formed along the other side of the axis of symmetry on the other side of the part. The shape-retaining tool for shoes according to claim 1, which is a utility model registered claim, which is provided with fold grooves formed by pressing the strips so that the main part is folded into the inside of the main part when the main part is bent.