JPH1088533A - Manufacture of guide block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the slippage of a guide block, improve the appearance, dimensional precision and productivity, and manufacture it at low cost by cold- working stainless steel material into a trapezoid, cutting both the ends followed by sloping, correcting the curvature, fixing a stud, finishing the surface, and then forming a film on the surface. SOLUTION: A stainless steel material is cold-worked into a trapezoidal section, and both the ends are cut into a prescribed length and a prescribed from such as semi-circle by punching. Both the end parts are sloped by pressing or grinding so that both the end parts have the same inclined surfaces as both the side surfaces. After correcting the curvature, a required number of studs are fixed, and the surface is then finished by hair line working, polishing or grinding. Further, the whole surface on the surface side of a guide block, the upper surface, the inclined surface, or a part of the upper surface is flame coated, painted or plated by power flame coating by using ceramics such as Al2 O3 as frame coating material to form a film thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a guide block used for outdoor or indoor roads or passages for guiding visually impaired persons and people with low vision.

[0002]

2. Description of the Related Art Conventionally, as a guiding block used for outdoor or indoor roads or passages for guiding visually impaired persons and visually impaired persons, hemispherical or oblong projections are formed at predetermined intervals on a square tile. A large number of Braille blocks are known. This braille block is made of a yellow synthetic resin or the like, and its presence can be easily confirmed with a sense of stepping on the projection, and thus is a very effective means for guiding a visually impaired person. However, when used in hotels, halls, shopping streets, etc., where high-quality images are important, the appearance is poor and the images are not necessarily satisfactory.

In addition, instead of the braille block, a guide block made of an oblong stainless steel or the like having a flat head portion (a long guide block may be referred to as a guide line) has been partially used. I have. However, since this stainless steel induction block is manufactured by casting, the dimensional accuracy and productivity are poor, and the hardness and strength are low and it is easy to wear, so that it is not possible to keep the manufactured aesthetic appearance for a long time. There were drawbacks.

The inventors of the present invention have made a flat material of stainless steel into a trapezoidal shape by cold working, then cut both ends into a predetermined shape, beveled both ends, hollowed out, and if necessary, cut the surface. After a process such as surface roughening and bending correction, a method was developed in which a stat was fixed by welding, the surface was finished, and a colored resin block was pressed into a hollow hole to produce an induction block. Patent application filed as Hei 7-351218. However, this method has better dimensional accuracy and productivity than those manufactured by the conventional method, and has high hardness and strength and is excellent in abrasion resistance. Since the colored resin block is press-fitted after being hollowed out for coloring, the cost is high and the colored resin block is easily worn.

[0005]

SUMMARY OF THE INVENTION The present invention is a method for inexpensively producing a colored stainless steel induction block having good appearance, high dimensional accuracy and high productivity, no slippage, and high hardness and strength. It is intended to provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for manufacturing an induction block, comprising: forming a material such as a flat rectangular stainless steel into a trapezoid by cold working; Cutting, beveling both ends, deburring if necessary and / or providing a recess or groove at the place to be coated, correcting the bend, fixing the stat, and fixing the surface. A finishing step and a step of forming a film on the surface by thermal spraying, painting, plating, or the like.

In order to achieve the above object, as a method for manufacturing an induction block, a step of forming a trapezoidal shape by cold working a material such as a flat stainless steel, a step of cutting both ends into a predetermined shape, and a step of cutting both ends. Beveling process, deburring process if necessary and / or providing shallow recesses or grooves in the place to be painted, roughening the surface, correcting the bend, fixing the stat, surface Finishing process and forming a film on the surface by thermal spraying, painting, plating or the like.

In the method of manufacturing a guide block according to the present invention, each step may be performed in the order described above, or may be performed in a different order. For example, a step of fixing the stat may be performed after the step of finishing the surface. In the method for manufacturing a guide block according to the present invention, a method in which a plurality of the above steps are performed together, for example, a step of forming a concave portion or a groove in a place where a film is formed on a surface and a deburring step are performed in one.
The present invention includes an operation performed simultaneously by two molds.
In addition, the above-described steps are essential steps, and of course, steps to be added as necessary, such as chamfering and grinding for smoothing the back surface, are included in the present invention.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of the present invention will be described below with reference to the drawings. The step of forming a trapezoid of a stainless steel flat material or the like by cold working according to the present invention is for forming a trapezoidal cross-sectional shape of the raw material, and a die having a trapezoidal hole die as shown in FIG. 2 or cold rolling using a roll vertically and horizontally as shown in FIG. 2, and cold pressing. The trapezoid in the present invention includes a deformed trapezoid as shown in FIG.

The step of cutting both ends into a predetermined shape involves cutting the ends so as to have a predetermined length and the ends into a predetermined shape such as a semicircle. Do. The step of making both end portions beveled is to make both end portions have the same inclined surface as both side surfaces, and is performed by press working, grinding, or the like. In the case where inclined surfaces are formed at both ends by press working, burrs are generated, so that it is necessary to add a deburring step. This deburring method includes:
There are a method using a punch press and a method using grinding.

The roughening step is for roughening the upper surface by forming a groove or the like on the upper surface by roll rolling, pressing or the like so as not to slip. When adding a groove, the groove
If it is too deep, dust and dirt accumulate, and if it is too shallow, it will be worn away and disappear. Therefore, about 0.4 mm is appropriate. The step of correcting the bend is to correct a bent part by cutting, forming a slope, roughening by pressing or the like, and is performed by pressing or the like.

The step of fixing the stat is for fixing the stat for fixing the guide block to a road, a floor, or the like, and is performed by spot welding, screwing, or the like of the stat manufactured in advance. The number of stats is two or more, and is determined according to the length of the guide block, the place where it is used, and the like. The stat is preferably made of a roughened surface in order to make it difficult to come off the road, the floor, or the like, for example, a stat bolt having a thread on the surface.

In the step of finishing the surface, the surface is finished, and hairline processing, polishing, grinding, and the like are performed.
The step of providing a concave portion or a groove at a place where a film is formed on the surface is performed by providing a concave portion or a groove so that the film does not become higher than the surrounding surface, because the film becomes more worn when the film is higher than the surface. Processing, cold drawing, machining, etc. are performed. When the surface is roughened, the depth of the recess is preferably equal to or greater than the depth of the groove formed by the roughening.

The step of forming a film on the surface includes forming a film on the entire front surface, the upper surface, the inclined surface, or a part of the upper surface of the induction block for coloring, hardening, roughening, etc. , Painting and plating. Spraying, powder type flame spraying, plasma spraying, and the like laser spraying, the spray _{material, Al 2 O 3, ZrO 2} ,
One or more ceramics such as TiO ₂ , Ni
Metal materials such as ─Cr alloys, Ni-based Cr─B-Si alloys, and mixtures of these ceramics and metal materials.

The paint may be applied only by brushing, spraying, or the like, but it is preferable to bake after painting, since the hardness is high and the abrasion resistance is high.
Any paint may be used as long as it has high hardness, excellent abrasion resistance, chemical resistance and adhesion, and does not slip. Plating is electroplating, chemical plating, CV
D, PVD, ion plating, sputtering, etc., and as a plating material, Al ₂ O ₃ , WC, Ti
Ceramics such as O ₂ , ZrO ₂ , TiN, Cr, N
i or a metal of these metals. In addition, in the step of forming a film on the surface, degreasing, surface roughening, base spraying, sealing treatment, post-treatment, etc. are required to enhance the adhesion of the sprayed film to form a film on the surface. In such cases, these processes are also included. Also,
The color to be colored is preferably yellow, gold, or the like, which can be easily visually recognized even by a low-vision person, but is not limited thereto.

Further, the stainless steel used for the production of the induction block may be of any type as long as it can be cold worked.
US 304, 316, 316L are preferred.

According to the present invention, the step of forming a trapezoidal material such as a flat rectangular stainless steel by cold working and the subsequent step by cold or mechanical processing are performed, so that the hardness and the hardness of stainless steel are higher than those of the conventional one. Strength increases. Also, because it is made of stainless steel, there is no rust,
Furthermore, since it can be manufactured mainly by press working, dimensional accuracy and productivity are high. Further, by providing a coating, coloring can be performed, so that the cost can be lower than that of the above-mentioned patent application, and by providing a coating having a high hardness, a coating having excellent wear resistance can be obtained. By changing the place where the is formed, a variety of guide blocks can be manufactured.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. Example 1 Example 1 will be described with reference to FIG. A and a in FIG. 4 from a rectangular material
_The cross section as described in ₁ has a base of 32 mm and a top piece of 20.5
mm, and a trapezoidal molded material having a total height of 5 mm was manufactured. Thereafter, this trapezoidal shaped material is formed into a semicircle with a radius of 16 mm at both ends by a punch press, and the entire length is 280 m.
An intermediate product as described in FIG.

Thereafter, the intermediate product was beveled at both ends as shown in FIG. 4C and further deburred to produce an intermediate product as shown in FIG. 4D. Then, after correcting the bending (f in FIG. 4), a diameter of 6 m was applied to three places on the back surface.
A stud bolt having a length of 15 mm and a length of 15 mm was fixed by spot welding (g in FIG. 4), and the surface was subjected to hairline processing to produce an intermediate product as shown in FIG. 5h.

Then, after the surface was degreased, a mask provided with two oval holes having a width of 13 mm and a total length of 100 mm was put on the upper surface of the intermediate product, and shot blasted using 80 mesh alumina particles. N as base spray
A mixed powder of 80% i powder + 20% Cr powder is sprayed at a speed of 200 m / s to form a 15 μm film, and then a mixed powder of 70% alumina powder + 30% titania powder is sprayed on this film as a main spray. Sprayed at a speed of 200 m / s to form a 220 μm film, and an epoxy resin was applied by hand on the sprayed film as a sealing treatment to form a thin gray film having a thickness of 240 μm. Induction blocks like ₁ were manufactured. The hardness of this film was Hs60, and the adhesion strength of the film was 370 kg / cm ² .

Embodiment 2 A description will be given with reference to FIG. After an intermediate product is manufactured by performing hairline processing on the surface in the same process as in Example 1, a mask having a hole having the same shape as the upper surface of the intermediate product is put thereon, and the entire upper surface is light gray in the same manner as in Example 1. to produce a guide block such as i ₂ of Figure 4 a film-forming.

Embodiment 3 A description will be given with reference to FIG. After obtaining the same steps a to c as in Example 1, a deburring step (d in FIG. 5) is performed, and a width 1
A 0.2 mm concave portion (e in FIG. 5) was formed by pressing using a mold having two oval protrusions each having a length of 3 mm and a total length of 100 mm. After that, the bend was corrected (f in FIG. 5), and a stat bolt with a screw of 6 mm in diameter and 15 mm in length was spot-welded to three places on the back surface and fixed (g in FIG. 5).
After finishing the hairline as a surface finishing process (h in FIG. 5), the upper surface of this intermediate product is 13 mm wide and 10 mm long.
A mask having two 0 mm oval holes is placed thereon, and shot blasting and base spraying are performed under the same conditions as in Example 1. Thereafter, a mixed powder of alumina powder and zirconia powder is sprayed to form a 2.
A coating having a thickness of 30 μm was formed, and an epoxy resin was manually coated as a sealing treatment on the sprayed coating to form an ocher coating having a thickness of 250 μm, thereby producing an induction block as shown in FIG.

Embodiment 4 A description will be given with reference to FIG. A rectangular material of SUS304 stainless steel having a cross section of 8 mm × 34 mm was cold-drawn using a mold having a trapezoidal hole as shown in FIG. 1 and a base 32 mm, a top piece 20.5 mm, section as described in a and a ₁ in Fig. 6 of the total height of 5mm were prepared trapezoidal molding material. Thereafter, this trapezoidal shaped material was punched out into a semicircle with a radius of 16 mm at both ends to produce an intermediate product as shown in FIG. The intermediate product was provided with inclined surfaces at both ends of a semicircle by pressing (c in FIG. 6) and deburred at both left and right ends by a punching press to produce an intermediate product as shown in FIG. 6d.

A groove having a depth of 0.4 mm was formed on the upper surface of this intermediate product by rolling as a roughening process as shown in FIG. 6E, and the bending was corrected by pressing (FIG. 6F). . Thereafter, a stud bolt with a screw of 6 mm in diameter and 15 mm in length was spot-welded and fixed to two places on the back surface of the intermediate product (g in FIG. 6), and a hairline process was performed as a finishing process on the surface (FIG. 6). h) After that, the peripheral inclined surface was roughened by shot blasting, degreased and washed with water, and then the modified inclined surface was mixed with a modified silica-based resin, yellow iron oxide (pigment), an acrylic resin, and an alcohol-based solvent. After forming a coating of about 35μ by spraying the paint as an undercoat, air-drying, spraying yellow iron oxide powder for roughening on the upper surface, and then forming a coating of about 20μ with modified silica resin by spraying After that, it is naturally dried, then put in a furnace and baked at 170 ° C. for 25 minutes, and coated with an epoxy resin as a sealing treatment to produce an induction block as shown in FIG. did. The hardness of this film was 9H in pencil hardness.

Embodiment 5 A description will be given with reference to FIG. After the same steps as in Example 4, a deburring step (d in FIG. 7) is performed, and then a width 1
A 0.4 mm concave portion was formed by pressing using a mold having an oval shape having a protrusion of 5 mm and a total length of 100 mm and having a roughened surface (e _{1 in} FIG. 7). Then the upper surface of the groove depth 0.4mm was formed as described in f ₁ in FIG. 7 by the rolls rolling as roughened, modified the bending by pressing (g ₁ in FIG. 7). Then, a stud bolt having a screw of 6 mm in diameter and 15 mm in length was spot-welded and fixed (h _{1 in} FIG. 7) to two places on the back surface of the intermediate product, and hairline processing was performed as a finish processing of the surface (FIG. 7). i ₁ ) After that, a mask having an oval hole having a width of 15 mm and a total length of 100 mm is put on the upper surface of the intermediate product, and under the same conditions as in Example 3, a base spraying, a main spraying and a sealing treatment are performed to obtain a thickness. to produce a guide block such as j ₁ in FIG. 7 to form a ocher coating 250 [mu] m.

Embodiment 6 A description will be given with reference to FIG. After the same steps as in Example 4, a deburring step (d in FIG. 7) is performed, and then a width 1
A groove having a length of 5 mm, a length of 120 mm and a depth of 0.4 mm was formed by cold drawing (e _{2 in} FIG. 7). Thereafter, as in Example 5, the upper surface was roughened to a depth of 0.4 by roll rolling.
The mm groove of formed as f ₂ in FIG. 7, correct the bending in a press (g ₂ in FIG. 7), i of (h ₂ in Fig. 7), finishing the surface (FIG. 7 spot welded stud bolt ₂ ) After that, a mask having a rectangular hole having a width of 15 mm and a total length of 120 mm was put on the upper surface of the intermediate product, and the same base spraying, main spraying and sealing treatment as in Example 1 were carried out to obtain a 240 μm thick. forming a thin gray film was produced guide block such as j ₂ in FIG.

The coatings of the above examples were excellent in hardness and adhesion, and all of these induction blows could be put to practical use.

[0028]

According to the present invention, the above-described configuration enables
It has the following excellent effects. (1) Since the step of forming a rectangular material of stainless steel into a trapezoid by cold working and the subsequent steps are manufactured by cold or mechanical processing, the hardness and strength of stainless steel are high, and the amount of wear is small. , Can keep the original aesthetic long. (2) Since the induction block is made of stainless steel, the appearance of the induction block is not impaired by rust or the like. (3) Since it can be manufactured mainly by press working, dimensional accuracy is high. (4) Since the coating is formed by thermal spraying instead of inserting colored blocks, productivity is high and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a mold used for manufacturing a trapezoidal shaped material of the present invention.

FIG. 2 is a diagram for explaining a rolling mill used for producing a trapezoidal shaped workpiece of the present invention.

FIG. 3 is a view for explaining one shape of a trapezoid used in the method of manufacturing a guide block according to the present invention.

FIG. 4 is a process diagram illustrating one embodiment of a method for manufacturing a guide block according to the present invention.

FIG. 5 is a process diagram illustrating another embodiment of the method of manufacturing the guide block according to the present invention.

FIG. 6 is a process diagram illustrating another embodiment of the method of manufacturing a guide block according to the present invention.

FIG. 7 is a process diagram illustrating another embodiment of the method of manufacturing the guide block according to the present invention.

Claims (5)

[Claims] 1. A step of forming a stainless steel material into a trapezoid by cold working, a step of cutting both ends into a predetermined shape, a step of beveling both ends, a step of correcting bending, a step of fixing a stat, and a surface. A method for producing an induction block, comprising: performing a step of finishing and a step of forming a film on a surface. 2. A step of forming a stainless steel material into a trapezoidal shape by cold working, a step of cutting both ends into a predetermined shape, a step of making both ends beveled, a step of roughening the surface, and a step of correcting bending. A step of fixing a stat, a step of finishing a surface, and a step of forming a film on the surface. 3. The method for manufacturing an induction block according to claim 1, wherein a step of providing a concave portion or a groove at a position where a film is formed on the surface is performed. 4. The method according to claim 1, further comprising the step of deburring after the step of making both ends beveled.
The method for producing a guide block according to any one of the above. 5. The method of forming a film on a surface comprises spraying, painting and plating on the surface of the induction block.
The method for manufacturing a guide block according to any one of claims 1 to 4, wherein: