JP2002069948A - Base member of walking guide body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base member of walking guide body in which a uniform surface layer can be formed by the insert molding and which can be costlessly manufactured. SOLUTION: In the constitution of the base member of the walking guide body in which an embedding shaft 12 is provided to embed the base member into a road face or a floor face, and it is put in cavities 21, 23a of a mold 20 to form a surface layer 2 on the surface by the insert molding, a number of supports 13 formed of protrusions are provided at the underface of the base member 10. The support 13 is formed by pressing or die forging.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base for a walking derivative embedded in a sidewalk or on a floor of a building to guide a visually impaired person and assist walking.

[0002]

2. Description of the Related Art As a walking derivative of this type, a metal substrate provided with a surface layer made of resin or rubber over the entire surface thereof, a substrate provided with a similar surface layer on the upper surface of the substrate, or a surface layer entirely formed Various types are provided, such as those not provided.

[0003] Above all, a walking dielectric substrate having a surface layer on the entire surface is first provided with a shaft buried in a road surface or a floor surface, and in this state, placed in a cavity of a pair of molds. Thereby, a surface layer is formed by insert molding.

In the insert molding, in order to allow molten resin or rubber to flow to the lower surface of the base,
It is necessary to provide a predetermined gap between the lower surface of the base and the cavity surface of the lower mold constituting the mold. Therefore, conventionally, as shown in FIG. 5, a spacer 101 having a thickness equal to the gap to be formed is welded to the lower surface of the base 100, and a surface layer 102 is formed on the surface excluding the spacer 101. .

[0005]

However, when the molten material is filled in the cavity at the time of insert molding, the above-mentioned spacer 1 is not used.
01 acts to hinder flow. When the flow of the molten material is deteriorated, the filling of the entire cavity becomes uneven. As a result, there is a problem that the side portion 102a of the surface layer 102 has a wavy shape when solidified, and the flatness is deteriorated. In addition, when the flatness is deteriorated, when the shaft 103 is buried in the road surface or the floor surface, the waving causes a gap between the surface layer 102 and the road surface or the floor surface. When the gap is 1 mm or more, there is a problem that the gap cannot be used as a product.

Alternatively, a burr is formed at the spacer 101 by preventing the flow of the molten material filled by the spacer 101. As a result, there is a problem that deburring work increases. Moreover, in the worst case, the vicinity of the spacer 101 in the formed surface layer 102 is turned up, and cannot be used as a product.

Further, the base 100 requires a spacer 101 made of a separate member, and the spacer 101 has to be welded. Therefore, there are problems that the number of parts and the number of working steps are large, and the cost is high. Further, when the welding material exceeds the end face of the spacer 101 during the welding, the flatness is deteriorated similarly to the above and the product cannot be used as a commercial product. As a result, there is a problem that the work of polishing the portion protruding from the spacer 101 increases.

Accordingly, an object of the present invention is to provide a walking derivative substrate that can form a uniform surface layer on the surface by insert molding and that can be manufactured at low cost.

[0009]

In order to solve the above-mentioned problems, the base of the walking derivative of the present invention is made of a metal plate, provided with a buried shaft buried on a road surface or a floor surface, and installed in a cavity of a mold. In a walking derivative substrate having a surface layer formed on its surface by insert molding,
It has a configuration in which a large number of support portions including protrusions are provided.

[0010] According to the above-mentioned base, since a support portion made of a projection is provided in order to form a gap between the cavity of the mold and the base, the surface layer made of resin or rubber is injection-molded. Further, it is possible to prevent the flow of the molten material from being hindered. As a result, the lower surface of the base can be uniformly filled over the entire area, so that the surface layer can be formed with a uniform thickness.

In the base, it is preferable that the support portion is formed by pressing or die forging so that all the support portions can be formed with a uniform protrusion amount. Further, in this case, unlike the conventional example, a separate member such as a spacer is not required, and a welding operation is not required, so that the cost can be reduced. In addition, the welding material goes over the end face,
By forming the surface layer up to the surface of the support portion, the thickness of the surface layer is not formed unevenly.

Further, the base has a long shape, and the support portions are provided at predetermined intervals on both sides in the longitudinal direction. The stability is improved by the support portions, and the material for forming the surface layer is injected. It is preferable to ensure that the pressure can be resisted.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1A and 1B show a walking derivative 1 formed by applying a substrate 10 according to an embodiment of the present invention.
Is shown. This walking derivative 1 is made of a base 10
Is provided with a surface layer 2 made of resin or rubber.

The base 10 is made of a metal plate such as brass as shown in FIG. This metal plate has a predetermined thickness,
Shaft holes 11 are provided at the center and on both sides at a predetermined distance from the center. And this shaft hole 11
In order to be embedded in a road surface or a floor surface, a buried shaft 12 composed of stud bolts is provided by a method such as welding or caulking so as to protrude from the bottom surface.

On the bottom surface of the base 10 of the present embodiment, a large number of support portions 13 formed of small circular projections are provided. This support part 13 is a long metal plate,
Both ends in the longitudinal direction and opposing positions on both sides along the longitudinal direction are provided at predetermined intervals. This support 13 is
It is formed by pressing or die forging. Therefore, a corresponding concave portion 14 is formed on the upper surface of the base 10.
The concave portion 14 is configured such that the upper end opening has a small diameter and the upper surface is not dented by contraction due to solidification after injection molding.

The base 10 having the above-described structure is provided with a support 1 for providing a predetermined gap between the base 10 and the cavity 23a of the mold 20.
Since 3 is integrally formed with the base 10, a spacer made of a separate member as in the conventional example is not required, and welding is not required. Therefore, the cost of the base 10 can be reduced. Further, since the support portions 13 are provided by pressing or die forging, all the support portions 13 can be formed with an equal protrusion amount. Moreover, unlike the conventional example, the yield does not deteriorate due to the welding operation. Therefore, productivity can be improved.

When the walking derivative 1 is formed using the base 10, the same mold 20 as that on which the conventional base with the spacer is installed is applied, and insert molding is performed.

More specifically, as shown in FIG.
Is composed of a pair of upper mold 21 and lower mold 23. The upper mold 21 is
The cavity 21a is formed so as to cover the upper surface from the lower surface of the base 10 and form the surface layer 2 with a desired thickness. The upper die 21 is provided with gates 22 for injecting resin at three locations in the center of the base 10 along the longitudinal direction. The lower mold 23 has a housing recess 24 into which the embedded shaft 12 is inserted.

When the base 10 is set on the lower die 23, the support portion 13 comes into contact with the cavity 23a, so that the lower die 23 is positioned at a predetermined distance from the surface of the cavity 23a of the lower die 23 and the lower surface of the base 10. At this time, as described above, since the large number of support portions 13 are provided with an equal protrusion amount, all the support portions 13 abut on the surface of the cavity 23a, and the surface of the cavity 23a and the lower surface of the base 10 Are located in parallel.

When the upper mold 21 is set on the lower mold 23 and the molten resin is injected into the cavities 21a and 23a, the base 10 is pressed against the lower mold 23 by the pressure. At this time, in the present embodiment, since the support portions 13 are provided at predetermined intervals on both sides in the longitudinal direction, it is possible to reliably counter the pressure.

Then, the injected molten material is applied to the substrate 10.
And flows to the lower surface. At this time, the base 10
Since the support portion 13 for maintaining the gap between the lower surface and the cavity 23a is formed of small projections, it does not hinder the flow of the molten material. Therefore, the lower surface of the base 10 can be uniformly filled over the entire area.

As a result, the surface layer 2 of the completed walking derivative 1 is formed with a uniform thickness without causing wavy deformation on both sides. Moreover, by forming the support portion 13, the concave portion 14 formed on the upper surface of the base 10 is formed.
Is processed so that its diameter becomes smaller,
There is no depression in that part. Similar functions and effects can be obtained even when rubber is injection molded instead of resin.

The substrate 10 of the walking derivative 1 of the present invention
Is not limited to the configuration of the above embodiment. For example, in the above-described embodiment, the support portions 13 are provided at predetermined positions at opposing positions on both sides along the longitudinal direction. However, as shown in FIG. Is also good. That is, the projecting position of the support portion 13 can be changed as desired according to the overall length and width of the base body 0 and the position of the gate 22 of the mold 20.

In the above embodiment, the support portion 13 is
Although the configuration is made up of small circular projections, the shape is 3
The shape may be a polygonal shape or an elliptical shape having a square shape or more. In addition, in order to prevent the surface layer 2 from being dented, it may have a narrow (for example, about 2 mm) band-like shape.

Further, in the above embodiment, the walking derivative 1
As described above, the base 10 for forming a long shape is described, but the base 10 may be a circular shape. In this case, the support 13 protrudes at a predetermined angle in the circumferential direction.

[0026]

As is apparent from the above description, the walking dielectric substrate of the present invention is provided with a supporting portion comprising a projection in order to form a gap between the mold cavity and the substrate. When the surface layer made of resin or rubber is injection-molded, it is possible to prevent the flow of the molten material from being hindered. As a result, the lower surface of the base can be uniformly filled over the entire area, so that the surface layer can be formed with a uniform thickness.

Further, since the support portions are formed by pressing or die forging, all the support portions can be formed with a uniform projection amount. Therefore, unlike the conventional example, a separate member such as a spacer is not required, and a welding operation is not required, so that cost can be reduced. In addition, since the surface layer is formed from the welding material beyond the end face to the surface of the support portion, the thickness of the surface layer is not unevenly formed.

[Brief description of the drawings]

FIG. 1 shows a walking derivative formed by applying a substrate of the present invention, (A) is a bottom perspective view, and (B) is a II of (A).
It is a line sectional view.

FIG. 2 is a partially enlarged view in which a part of a base is broken.

FIG. 3 is a cross-sectional view showing a state where a base is set in a mold.

FIG. 4 is a perspective view showing a walking derivative formed by another substrate which is a modified example.

5A and 5B show a walking derivative formed by applying a conventional substrate, wherein FIG. 5A is a bottom perspective view and FIG. 5B is a cross-sectional view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Walking derivative, 2 ... Surface layer, 10 ... Substrate, 12 ... Embedded shaft, 13 ... Support part, 20 ... Die, 21 ... Upper mold, 21a ...
Cavity, 22 gate, 23 lower mold, 23a cavity.

Claims (3)

[Claims] 1. A walking dielectric substrate comprising a metal plate, having a buried shaft buried on a road surface or a floor surface, being installed in a cavity of a mold, and forming a surface layer on the surface by insert molding. A base for a walking derivative, wherein a plurality of support portions comprising protrusions are provided on a lower surface. 2. The walking derivative body according to claim 1, wherein the supporting portion is formed by pressing or die forging. 3. The walking derivative substrate according to claim 1, wherein the substrate has a long shape, and the support portions are provided at predetermined intervals on both sides in the longitudinal direction.