JP3404631B2 - How to attach the lift to the setback heel and footwear using this - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a lift to a heel and footwear using the same, and more specifically, to a bottom surface of a setback heel in which a lower part of the heel is formed obliquely so as to flow backward. The present invention relates to an improvement in a method of attaching a lift to a part and footwear manufactured by using this attachment method.

[0002]

2. Description of the Related Art To attach a lift to a heel, a lift attachment hole is formed from the bottom surface of the heel toward the inside, and a rod-shaped attachment projection is provided on the upper surface of the lift so that the lift is placed below the heel. By pressing at least one of them in this state, the mounting projection is fitted into the lift mounting hole and press-contacted with each other so that the both are integrated.

For example, as shown in FIG. 3, a heel (1
3) In the straight type heel base (11) having no protruding portion or protruding portion in the portion,
A lift mounting hole (14) is provided vertically from the bottom surface portion (13a) of the heel toward the inside, and the lift (1
2) A rod-shaped mounting protrusion (15) is provided on the upper surface of 2), and the lift (12) is arranged below the heel (13) to press at least one of them while maintaining a horizontal state. The bottom (1) of the heel (13)
The lift (12) is attached to 3a).
Further, as shown in FIG. 4, a lower portion (26) of the heel (23) is formed obliquely so as to flow rearward so that the heel base (21) of a setback type has a shape protruding or protruding outward. ) In the heel (23)
A lift mounting hole (24) is provided obliquely inward from the bottom surface part (23a) of the same, and a rod-shaped mounting projection (25) that also obliquely projects is provided on the upper surface of the lift (22).
The lift (22) is arranged below the heel (23), and the lift mounting hole (24) and the mounting projection (2) are arranged.
5) is obliquely arranged so that the direction of the pressing direction is the same as the pressing direction, and at least one of them is pressed while maintaining this state, whereby the bottom surface part (23) of the heel (23) is
A lift (22) is attached to a).

[0004]

However, in the straight type in which the heel is formed so as to be entirely suspended, the lift can be easily attached, but the lower part of the heel is formed obliquely so as to flow backward. It is very difficult to attach the lift to the setback type.

That is, the method of attaching the lift to the heel can be said to be the easiest, most efficient, and safest method because it can be done by pressing from the top and bottom while maintaining the two in a horizontal state. It is desirable that the hole and the mounting projection be formed in the same vertical direction (vertical direction) so that they are positioned in line with the pressing direction. As described above, in the case of the straight type, the lift mounting hole and the mounting projection are formed. Since the direction of is the same vertical direction as the pressing direction and is located on a straight line, it is possible to attach the lift to the bottom part of the heel while maintaining the horizontal state, but in the case of the setback type,
Since the direction of the lift mounting hole of the heel and the mounting projection of the lift are diagonal and not located on a straight line, the heel and lift should be positioned so that these directions are the same as the pressing direction and located on a straight line. It must be carried out while maintaining an unstable state in which both are arranged diagonally.

At this time, as shown in FIG. 5, in the set-back type heel base (31), the heel (3
If a vertical lift mounting hole (34) is provided from the bottom surface part (33a) of 3) toward the inside, and a rod-shaped mounting projection (35) vertically projecting is provided on the upper surface of the lift (32), The heel (33) and the lift (32) can be easily pressed like the straight type, and the lift can be efficiently and safely attached to the bottom surface (33a) of the heel (33). It may be considered that it is easy to think, but the lift mounting hole in the heel is formed at the time of molding the heel base, and in that case, the mold used for molding the heel base is usually one mold. As it is an integrated type, the heel base (31)
Must have an outer shape and a lift mounting hole that can be demolded from the molding frame, and no matter how many lift mounting holes stand upright vertically, the lower part of the heel (36 ) Is formed by projecting or bulging outward, the lower part (36) is caught on the formwork, and is removed like the straight type heel base without a part protruding or bulging outward. It cannot be shaped.

Therefore, both the shape of the heel (outer shape) and the shape of the lift mounting hole must basically allow the heel base to be demolded from the molding frame. There is a contradictory relationship between the mold release from the frame and the ease of attaching the lift to the heel. If priority is given to the mold release of the heel base from the mold, it is very difficult to attach the lift to the heel depending on the shape of the heel. On the other hand, if priority is given to the ease of attaching the lift to the heel, the shape of the heel cannot be removed from the mold.

The mold used to mold the heel base is
If a so-called split mold is used that is composed of three partial frame bodies consisting of left and right frame bodies and a lower frame body, a set is made regardless of the outer shape of the heel portion and the orientation of the lift mounting hole. In a heel base having a back type heel, even if a vertical lift mounting hole is provided from the bottom surface of the heel toward the inside, it can be molded so that it can be demolded. In the case of molding, since only one heel base can be molded at a time, it is extremely inefficient compared to the normal integrated type that can mold multiple heel bases at one time. Costly
The molding method is not profitable in terms of cost.

[0009]

In order to solve such a problem, the present invention provides a lift-up mechanism for the heel even in the case of a setback type in which the lower part of the heel is formed obliquely so as to flow rearward. As in the case of the straight type installation, it is provided from the bottom of the heel toward the inside so that it can be easily performed while maintaining the horizontal state and can be released from the molding frame of the heel base. By improving the shape of the lift mounting hole to a specific shape, it is possible to efficiently and safely mount the lift on the bottom surface of the heel.

That is, according to the present invention, a lift mounting hole is formed from the bottom portion of the setback heel, which is obliquely formed so that the lower portion thereof flows backward, and the lift mounting hole projects into the upper surface of the lift. In a method of attaching a lift to a setback heel in which a lift is attached to the bottom surface of the heel by fitting the attachment protrusion provided on the heel, the front and rear width of the lift attachment hole provided in the heel is moved downward. According to the present invention, the mounting projections provided on the lift are formed so as to stand vertically. As a result, a vertical hole portion that allows the mounting protrusion to be vertically inserted into the lift mounting hole and an oblique hole portion that allows the heel base to be released from the molding frame are formed. The mounting hole and the mounting projection are aligned in the same vertical direction as the pressing direction, so that the heel (heel base) and the lift are maintained in the horizontal state, as in the case of a straight type heel. By pressing at least one of them from above and below while keeping the above, the lift can be easily, efficiently and safely attached to the bottom surface of the heel.

Further, according to the present invention, the lift mounting hole provided in the heel is formed in a slit shape wide in the front-rear direction. As a result, it is possible to increase the ratio of the side surface portion of the mounting protrusion provided on the upper surface of the lift abutting the side surface portion of the lift mounting hole that is wide in the front-rear direction, and to further improve the pressure contact force and friction force between the two. It can be raised to prevent the lift from coming off the bottom of the heel. The shape of the mounting projection may be a wall-shaped body that is wide in the front-rear direction in accordance with the lift mounting hole, or two rod-shaped projections that are separated in the front-rear end direction, or that is wide in the front-rear direction. It is conceivable that the wall-shaped body has a comb-tooth shape in which a plurality of cuts (slits) are provided.

At this time, as the lift mounting hole formed so as to widen in the front-rear width as it goes downward, for example, the front side surface is vertically formed and the rear side surface is formed obliquely so as to widen downward, either It may be possible to form the side surface obliquely so that it expands as it goes downward, but considering the mounting and fixing state with the mounting protrusion in the lift, there is a possibility that the ratio of the areas that will contact each other in the vertical state will increase. It is desirable to use the former lift mounting hole, and further, at least three side surfaces (that is, each of the left and right side surfaces and the front side surface) of the mounting protrusion provided on the upper surface of the lift are vertical to the side surface of the lift mounting hole. It is desirable to have a shape in which the contact is made. As a result, it is possible to increase the ratio of mutual contact in the vertical state, further increase the pressure contact force between the two, and prevent the lift from coming off from the bottom surface portion of the heel. In the present invention, the former lift mounting hole is desirable, and the latter lift mounting hole is not excluded. Therefore, the present invention also includes the adoption of the latter lift mounting hole.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1 and FIG. 2, the setback heel used in the present invention is a heel (3) part formed by obliquely projecting a lower part (6) so as to flow backward and a core part corresponding to the arch of the foot. (7) is integrally configured as a heel base (1),
Although not shown, the arch-corresponding core portion (7) is directed upward so that the lower portion (6) of the heel (3), which is obliquely projected, is in a substantially vertical direction without protruding outward so that it can be released from the mold. By the integrated type consisting of one frame body in which the heel base (1) part is entirely designed to be slanted,
A plurality of synthetic resins such as acetal resin are collectively molded at the same time.

Further, an opening is provided in the bottom surface portion (3a) of the heel (3) portion of the heel base (1), and the front-rear width becomes narrower as it goes inward (upward), that is, the front side surface. Is vertical and the rear side surface (4a) is inclined as it goes downward, the lift mounting hole (4) having a wide deformed trapezoidal side surface and an elongated slit bottom surface is provided. .

On the other hand, the lift (2) is also made of a single frame like the heel base (1) so that a mounting protrusion (5) standing upright on the upper surface is integrally formed. The mounting projections (5) are simultaneously molded in a mass by using the same material, and the mounting protrusions (5) have a wide rectangular side surface and a planar shape that is an elongated rod-like wall shape that can be inserted into the lift mounting holes (4). Are doing At this time, the front-back width of the mounting protrusion (5) is
The lift mounting hole (4) has a size substantially equal to the front-rear width of the lift mounting hole (4) excluding the oblique rear side surface (4a).

The heel base (1) constructed as described above
The lift (2) is easily maintained by inserting the mounting protrusion (5) of the lift (2) into the lift mounting hole (4) and pressing it from above and below while maintaining the horizontal state as described above. Efficiently and safely, the front side surface of the mounting protrusion (5) of the lift (2) and the three side surfaces of the left and right side surfaces are the vertical front side surface of the lift mounting hole (4) of the heel (3) and The left and right side surfaces are in close contact with each other, so that they are integrally attached so as not to come off easily due to the pressure contact force of each other.

The lift (2) is attached to the heel (3) by the rear side surface (4) of the lift attachment hole (4).
Since a) is formed obliquely, no matter which position the lift (2) is fitted into, the rear upper corner of the mounting protrusion (5) of the lift (2) is formed obliquely to the rear. The lift (2) is moved along the side surface (4a), and the lift (2) is finally arranged at a predetermined position where the front side surface abuts the vertical front side surface of the lift mounting hole (4).

In the case of manufacturing footwear such as sandals using the heel base formed by the method of attaching the lift to the heel as described above, although not shown in the figure, the heel base is also formed on the heel base. A separate sandal is obtained by attaching a sandal stand, providing a wide upper portion near the toe of the sandal stand, and further extending a back band portion around the heel of the sandal stand, if necessary.

[0019]

As described above, according to the present invention, the front and rear widths of the lift mounting holes formed in the heel are formed so as to widen downward, so that the lower portion is formed obliquely so as to flow backward. Even in the case of a set-back type heel, the lift having a vertically standing attachment protrusion on the upper surface is maintained while maintaining the horizontal state of the heel (heel base) and the lift as in the case of the straight type heel. By pressing from above and below, the heel can be easily, efficiently and safely attached to the bottom surface.

Moreover, the lift mounting hole is formed in a slit shape wide in the front-rear direction, and the mounting projection is formed into a wall-shaped body wide in the front-rear direction in accordance with the lift mounting hole, so that the two parts abut each other. It is possible to prevent the lift from coming off from the bottom of the heel by increasing the pressure contact force and frictional force.

Further, the lift mounting hole is formed obliquely so that the front side surface is vertical and the rear side surface widens downward.
Further, by forming the front side surface of the mounting projection vertically, the lift mounting hole and at least three side surfaces of the mounting projection (that is, each of the left and right side surfaces and the front side surface) abut in a vertical state, It is possible to increase the ratio of contact between the two and further increase the pressure contact force and frictional force so that the lift does not come off from the bottom surface of the heel.

Further, the heel (heel base) used in the present invention can be molded by an ordinary integral mold without using a split mold, and can be demolded without any trouble, so that no trouble is required. It can be mass-produced efficiently and can be profitable in terms of cost.

[Brief description of drawings]

FIG. 1 is a side view illustrating a method of attaching a lift to a heel according to the present invention.

FIG. 2 is a development view of the mounting method shown in FIG.

FIG. 3 is a side view illustrating a conventional method of attaching a lift to a heel.

FIG. 4 is a side view illustrating another method of attaching the lift to the conventional heel.

FIG. 5 is a side view for explaining still another conventional method of attaching the lift to the heel.

[Explanation of symbols]

1 ... heel base 2 ... lift 3 ... heel 3a ... bottom part 4 ... Lift mounting hole 4a: rear side 5 ... Mounting protrusion 6 ... Overhanging part 7: Arch equivalent core

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A43B 1/00-23/30 A43D 25/06 A43D 86/00

Claims (5)

(57) [Claims] 1. A lift mounting hole is formed inward from a bottom surface of a setback heel in which a lower portion is obliquely formed so as to flow backward, and the lift mounting hole is provided so as to project to an upper surface of the lift. In a method of attaching a lift to a setback type heel in which a lift is attached to the bottom surface of the heel by inserting the attachment projection, the front and rear width of the lift attachment hole provided in the heel is expanded as it goes downward. And the mounting protrusions provided on the lift are formed so as to stand upright, and at least one of the heel and the lift is pressed while keeping the heel and the lift in a horizontal state to lift to the bottom surface of the heel. A method of attaching a lift to a setback type heel, which is characterized by being attached. 2. The method of attaching a lift to a setback heel according to claim 1, wherein the lift attachment hole provided in the heel is formed in a slit shape having a wide width in the front-rear direction. 3. The lift for a setback heel according to claim 1, wherein the lift mounting hole formed in the heel is formed by vertically forming one of front and rear side surfaces. How to install. 4. The set according to claim 1, wherein the mounting protrusion provided on the lift has a shape in which at least three side surfaces are in contact with side surfaces of the lift mounting hole. How to attach the lift to the back heel. 5. Footwear manufactured by the method for attaching a lift to a setback heel according to any one of claims 1 to 4.