JPH0436545B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a core material covered with a sheet-like enveloping material made of resin (for example, foamed urethane, vinyl chloride, etc.). The present invention relates to a locking structure of a core material that locks edges.

(Prior Art) Cars, wheelchairs, and the like are generally provided with handles, armrests, and the like. These handles and armrests are usually made to be flexible so that they are comfortable to use.
It is integrally molded into a predetermined shape using foamed resin such as foamed urethane.

However, since these conventional handles and armrests are made of foamed resin, they not only take time to manufacture, but also have problems in that they are integrally molded, which increases manufacturing costs.

In order to solve these problems, various methods have been devised in the past, such as the 4th method.
As shown in the figure, a sponge-like elastic body 80 made of urethane or the like is adhered to the upper surface of a core material 70 formed into a predetermined shape such as a handle or an armrest, and a resin such as urethane foam or vinyl chloride is attached to By covering with the sheet-like enveloping material 90 made by the manufacturer, it is possible to shorten the manufacturing time and reduce the manufacturing cost.

(Problems to be Solved by the Invention) However, in this method, the edges 91a and 91b of the enveloping material 90 are bent inward of the core material 70, and the bent portions are crimped to the mounting body 82 with screws 81. to fix the core material 70 to the mounting body 82 and to prevent the wrapping material 90 from coming off or shifting, or to fix the metal piece 82 etc. to the wrapping material 90.
By installing this over the bent portion of the cover and pressing it with a screw 81, the enveloping material 90 is prevented from coming off or shifting.

Therefore, when fixing the core material 70 to the edge of the attachment body 82 as shown in FIG. 5, one bent portion 91b is pressed and fixed to the attachment body 82, but the other bent portion 91a The conventional method has the problem that it cannot be fixed because it is not pressed, and that there are restrictions on where it can be used.

In addition, when the wrapping material 90 is torn or damaged and it becomes necessary to replace the wrapping material 90, in the conventional locking structure, the screw 81 is loosened and the core material 70 is once attached to the mounting body. Since it is necessary to replace the encapsulant 90 after removing it from the casing 82, the replacement work becomes complicated, which poses a problem in terms of work efficiency.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to reduce the manufacturing cost as an alternative to integrally molded products made of foamed resin, and to reduce the number of locations where it is used. To provide a locking structure for a core material when covering the core material with an enveloping material, in which there is no restriction on the operation of the enveloping material, and the replacement work of the enveloping material can be performed simply and quickly.

(Means for Solving the Problems) The means taken by the present invention to solve the above problems are as follows: ``A sheet-like enveloping material 10 made of resin is covered with a core material 20. Edge 11 of wrapping material 10
A locking structure of the core material 20 that locks the core material 20, which includes a locking groove 30 formed along the inner side surface of the core material 20 into which the edge 11 of the enveloping material 10 is inserted; The locking structure for the core material 20 is characterized by comprising a protrusion 25 that presses the enveloping material 10, which is provided in a ladder shape along the longitudinal direction of the inner wall of the stop groove 30. It is.

(Action of the invention) Therefore, the locking structure of the core material 20 according to the present invention is as follows:
A sheet-like enveloping material 10 made of resin is covered with a core material 20 formed into a predetermined shape, and the edge 1 of the enveloping material 10 is
1 to the core material 20, by one inner wall of the locking groove 30 provided inside the core material 20 and the protrusion 25 provided in a ladder shape on the other inner wall,
It acts to clamp and fix the wrapping material 10.

(Example) An example in which a locking structure for a core material 20 according to the present invention is applied to a core material 20 of an armrest 50 for a wheelchair will be described below with reference to FIGS. 1 to 3.

FIG. 1 is an exploded perspective view, partially in section, showing the structure of the armrest 50 according to this embodiment, and is a view seen from the bottom of the armrest 50. As shown in this figure, the armrest 50 according to this embodiment is composed of a covering material 10, an elastic body 40, and a core material 20, and as shown in FIGS. 2 and 3, a frame 61 of a wheelchair 60 It is fixed to the top with screws 62.

The wrapping material 10 is formed of a vinyl chloride sheet material so as to cover the elastic body 40 and the core material 20, and has one edge 11a (the left side in FIG. 1, hereinafter referred to as the left edge). The end 11a) is bent to form a U-shape, and the other end 11b (hereinafter referred to as
The right edge 11b) is also formed in a J-shape.

The elastic body 40 is a sponge-like body made of urethane or the like, and is adhered to the upper surface of the core material 20 to give elasticity to the upper surface of the armrest 50, making it appear as if it were integrally formed of foamed resin. It's getting old.

The core material 20 is integrally formed of ABS resin so that its cross section is approximately trapezoidal, and
Two partition walls 21a and 21b are formed inside the core material 20 along the side surfaces thereof, and these partition walls 21a and 21b are reinforced by a plurality of reinforcing walls 23 provided in a direction crossing the core material 20. has been done. Therefore, of the two partition walls 21a and 21b, the left partition wall 21a in FIG. Surface 22a (first
The left side surface in the figure) constitutes a locking groove 30 into which the left edge 11a of the wrapping material 10 is inserted.
Note that the edge 23a of the reinforcing wall 23 is connected to this armrest 50.
It is cut into an arc shape to match the frame 62 so that it can be securely fixed to the frame 61 of the wheelchair 60.

A piece-shaped protrusion 25 is provided on the inner wall of this locking groove 30 (in this embodiment, the left side surface of the left partition wall 21a).
is formed in the shape of a ladder along its longitudinal direction, and as shown in FIG. The left edge 11a of the wrapping material 10 is formed by the inner wall of the left side surface 22a of the core material 20 and this protrusion 25.
It is designed to be clamped and fixed.

In addition, a mounting hole 24 is formed in the core material 20 at an appropriate location at the intersection of the right partition wall 21b and the reinforcing wall 23, and screws 62 are provided to be used when fixing the core material 20 to the wheelchair 60. can be inserted.

Next, the usage method and function of the armrest 50 according to this embodiment will be explained.

FIG. 3 is a cross-sectional view showing a state in which the armrest 50 according to this embodiment is attached. As shown in this figure, the elastic body 40 and the core material 20 are covered with the wrapping material 10, the left edge 11a of the wrapping material 10 is inserted into the locking groove 30, and the right edge 11b is inserted into the locking groove 30. Right side 22 of core material 20
Hang it on the edge of b. The armrest 50 covered with the wrapping material 10 is attached to the frame 61 of the wheelchair 60 by screws 62 inserted from the bottom thereof. At this time, the left edge 11a of the wrapping material 10 is clamped and fixed by the left side surface 22a of the core material 20 and a protrusion 25 provided in a ladder shape on the left partition wall 21a,
On the other hand, the right edge 11b of the wrapping material 10 is connected to the edge of the right side surface 22b of the core material 20 and the frame 61 of the wheelchair 60.
It is clamped and fixed by.

In this way, the core material 20 of the armrest 50 according to this embodiment
is the left edge 11a of the wrapping material 10 with the protrusion 25 provided on the left partition wall 21a inserted into the locking groove 30.
The left edge 11 of the wrapping material 10 is pressed by the inner wall of the left side surface 22a of the core material 20 and this protrusion 25.
It acts to clamp and fix a.

Therefore, even if the left edge 11a of the enveloping material 10 is not pressed and fixed by the pressing member 82 such as a mounting body or a metal piece as in the conventional case, the left edge 11a is securely clamped and fixed, and the enveloping Since the material 10 does not come off or shift from the core material 20, there are no restrictions on where it can be used, and even if the enveloping material 10 is torn or scratched, the enveloping material 1
0 can be exchanged easily and quickly.

In this embodiment, the locking groove 30 is formed on the left side surface 22a side of the core material 20, but the locking groove 30 is also provided on the right side surface 22b side. By clamping and fixing the edge 11b, this armrest 50 can also be fixed to the frame 61 of the wheelchair 60 only by the center of the core material 20.

Further, in this embodiment, the protrusion 25 is provided on the left partition wall 21a, but the left side surface 2 of the core material 20
A similar effect can be obtained even if it is provided on the inner wall of 2a.

Further, an enveloping material 10, an elastic body 40, and a core material 20
The material of the enveloping material 10 is not limited to this example, and the material of the enveloping material 10 may be a resin material such as urethane foam,
The elastic body 40 may be made of a rubber material, and the core material 20 may be made of metal such as aluminum.

Furthermore, in this embodiment, the edges 11a and 11b of the enveloping material 10 are formed in a U-shape or a J-shape, but the edges 11a and 11b of the enveloping material 10 are formed in a U-shape or a J-shape. Even in such an expanded state, the locking structure of the core material 20 according to the present invention allows the wrapping material 1 to
The edges 11a and 11b of 0 can be securely clamped and fixed.

The above describes how the present invention is applied to the core material 20 of the armrest 50 for a wheelchair.
Although the present invention is not limited to the above-mentioned embodiment, it can be applied to most objects that have been conventionally integrally formed from foamed resin, such as automobile door handles. Needless to say.

(Effects of the Invention) As described above, the core material locking structure according to the present invention covers a core material formed in a predetermined shape with a resin sheet-like enveloping material, and the edges of the enveloping material. When locking the end to the core material, the wrapping material is secured by one inner wall of the locking groove provided inside the core material and a ladder-shaped protrusion provided on the other inner wall. It is configured to be clamped and fixed.

Therefore, by covering a core material with such a structure with an enveloping material and locking the edges of the enveloping material, it is possible to manufacture a one-piece molded product made of foamed resin. As a result, manufacturing time can be shortened, and manufacturing costs can also be reduced.

Furthermore, the present invention securely secures the edge of the wrapping material by one inner wall of the locking groove provided inside the core material and the protruding body provided in a ladder shape on the other inner wall. Since it is designed to be clamped and fixed, the folded part of the wrapping material can be crimped to the mounting body as in the past, or a metal piece can be installed over the bent part of the wrapping material.
It is no longer necessary to press this with screws,
It is possible to prevent the wrapping material from coming off or shifting no matter where it is. That is, it has the effect that there are no restrictions on the locations where it can be used.

Furthermore, the locking structure of the core material according to the present invention is such that the wrapping material is clamped and fixed by simply inserting the edge of the wrapping material into the locking groove. Even if it is torn or scratched,
The enveloping material can be replaced easily and quickly.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a partial cross section of an embodiment of the core locking structure according to the present invention, seen from below; Fig. 2 is a perspective view showing the state in which an armrest is attached in the embodiment; The figure is a cross-sectional view showing how the armrest is attached in one embodiment, Figure 4 is a cross-sectional view showing a conventional core locking structure, and Figure 5 is another conventional core locking structure. FIG. Explanation of symbols, 10... Enveloping material, 11... Edge of encasing material, 20... Core material, 25... Projection, 30...
...Latching groove.

Claims (1)

[Claims] 1. Covering a core material with a sheet-like covering material made of resin,
A locking structure for a core material that locks an edge of the wrapping material, the locking groove being formed along an inner side surface of the core material into which the edge of the wrapping material is inserted; A locking structure for a core material, comprising a protrusion that presses the wrapping material provided in a ladder shape along the longitudinal direction of the inner wall of the locking groove.