JPS61162453A - Roller made of metal - Google Patents

Abstract

PURPOSE:To enable papers to be reliably conveyed with high precision, by a method wherein, in a roller made of a metal for a printer and the like, a number of fine projections, having a top surface making an acute angle with each of side surfaces, are provided on the outer surface of a plate parent body made of a metal secured to the outer surface of a base body in a circle in cross section. CONSTITUTION:After degreasing, a photo resist film 11 is coated on the surface of a plate material 10 made of a metal, and a photo mask 12 having a pattern of projections intended to be formed is located thereon for exposure and development processing, baking processing of the remaining resist film 11 is effected, and openings 11 are bored to form a metallic exposure part 14. The metallic exposure part 14 is corroded by means of a corrosion solution A to form recessed parts 15, and the remaining resist film 11 is removed. The so obtained plate parent body 3 is wound around the outer peripehry of a base body 2 in a circle in cross section to form a roller 1 made of a metal. This enables formation of a number of projections 4, having a top surface 5 making an acute angle with each of side surfaces 6, on the surface of the plate parent body 3 with high mass productivity, increases fastening of the paper to the roller, and permits the paper to be reliably conveyed with high precision.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in metal rollers used, for example, in feeding devices.

(Prior Art) Generally, OA (office automation) equipment such as printers, plotters, and copiers is equipped with a feeding device for feeding paper, and this device uses driving and driven rollers. has been done.

This type of roller is usually made of metal, synthetic resin, rubber, etc. Among them, rubber rollers are frequently used because of their large frictional resistance.

However, since rubber rollers are inferior in terms of durability and wear resistance, they have the disadvantage of having a very short lifespan.

Therefore, in order to improve this point, we have developed a metal roller with many protrusions formed on its surface by knurling (rolling), or a metal roller with many protrusions formed on its surface by cutting. It is being used.

However, the former metal roller has its protrusions formed by knurling, so although it is relatively easy to manufacture and the product price is low, the shape of each protrusion is basically chevron-shaped, and the height of the top is Strictly speaking, this is not uniform, so the grip on the paper is not uniform and the frictional resistance is low.

On the other hand, the latter metal roller has its protrusions formed by cutting, so compared to the former metal roller, the tops of the protrusions are relatively sharp and grip the paper better.
Although it has a large frictional resistance, it takes a lot of time and effort to manufacture, so it has the disadvantage that the product price is very high.

(Problems to be Solved by the Invention) The present invention was devised in order to solve the above-mentioned problems. The purpose is to provide a metal roller that is very large and yet has a low product price.

(Means for Solving the Problems) The metal roller rack of the present invention includes a base having a circular cross section, a metal plate base fixed to the outer surface of the base, and a plurality of metal rollers integrally formed on the outer surface of the plate base. It is characterized by the fact that it is made up of uniform, minute protrusions that form acute angles on top and side surfaces.

That is, a plate base having a large number of protrusions is attached to the outer periphery of the base body, and the intersecting angle between the top surface and the side surface of each protrusion is an acute angle.

(Function) Since the angle formed between the top surface and the side surface of each protrusion is an acute angle, the bite is extremely good and the frictional resistance is extremely high.

Therefore, when used, for example, as a feed roller for feeding paper, the paper can be reliably fed with high precision.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a schematic perspective view showing the entire metal roller according to an embodiment of the present invention. FIG. 2 is a partially enlarged vertical sectional view. FIG. 3 is a perspective view showing an enlarged portion of the protrusion.

The main parts of the metal roller 1 include a base body 2, a plate base body 3, and projections 4.

The base body 2 has a circular cross section.

In this example, it is made of steel and has a circular, cylindrical shape.

The plate base body 3 is made of metal and attached to the outer periphery of the base body 2 .

In this example, it is made of steel and has a flat plate shape.

The protrusions 4 are of the same quality as the plate base body 3, are integrally provided in large numbers on the outer surface thereof, and are uniform and fine with a top face 5 and a side face 6, the angle α formed between these being an acute angle.

In this example, it has a substantially mushroom shape with an acute edge 7 formed at the boundary between the top surface 5 and the side surfaces 6, and the top surface 5 is flat and the side surfaces 6 are arcuate. Each protrusion 4 is in a predetermined arrangement! ? .

Therefore, they protrude uniformly.

Therefore, in this embodiment, the outer diameter of the metal roller 1 (the protrusion 4
) is 15.0+o+, the inner diameter is between 10.0 and the length is 30, and the maximum diameter of the protrusion 4 is approximately 0.
1fl, height H of protrusion 4 is approximately 0.1 fin, angle α of edge 7
is approximately 70 degrees.

Such a metal roller 1 can be used as a driving roll of a feeding device by inserting and fixing a shaft 8 in the center, or as a driven roller of a feeding device by loosely fitting a shaft 8 in the center. used.

The metal roller 1 has a large number of protrusions 4 on the outer surface of a plate base 3 attached to the outer periphery of the base 2, and the angle α formed between the top surface 5 and the side surface 6 of the protrusions 4 is an acute angle. When used as a feed roller of a paper feeding device, the protrusions 4 bite into the paper very well, and the frictional resistance is dramatically increased compared to conventional metal rollers.

Therefore, the paper does not slip between the paper and the paper, and it is possible to reliably and accurately feed the paper.

A plate base 3 having such a protrusion 4 of a metal roller 1,
It can be produced by a method applying photo-etching.

FIG. 4 to FIG. 11 are explanatory diagrams showing an overview of the method.

In this method, various metal materials such as steel that can be corroded by a corrosive liquid are used as starting materials.

In this example, as shown in FIG. 4 and FIG.
, a steel plate with a thickness of 0.2 mm is used as the starting material plate material 10.

After degreasing the surface of the plate material 10, a corrosion-resistant photosensitive resin, that is, a photoresist film 11, is applied as shown in FIG.

Next, the photoresist film 11 is subjected to a baking process, that is, a process called pre-baking.

On the other hand, separately, a pattern of protrusions to be formed is drawn using a microplotter or the like and reduced in size to produce a photomask 12 which is a precision photographic plate.

Then, as shown in FIG. 7, a photomask 12 is placed on the photoresist film 11 and exposed.

Thereafter, the exposed plate material 10 is developed, and the photoresist film 11 left on the plate material 10 in the development process is subjected to a baking process, that is, a process called post-bake. Openings 13 having the same shape as the pattern drawn on the mask 12 are made in the photoresist film 11, as shown in FIG. 8, to form exposed metal parts 14.

In this embodiment, a so-called positive type was described using a photoresist film and a photomask corresponding to the photoresist film, in which the exposed area is removed by exposure and development processing.
As is well known, on the contrary, it may be a negative type using a photoresist film and a corresponding photomask, in which exposed areas and outside areas are removed by exposure and development. In short, it is sufficient if the photoresist film remains at the locations corresponding to the protrusions to be formed.

Next, the exposed metal portion 14 is chemically etched by the corrosive liquid A while physically moving the plate material 10 having the exposed metal portion 14 thus obtained and the corrosive liquid A relative to each other.

This corrosion causes the plate material 10 and the corrosive liquid A to physically move relative to each other, so that it spreads laterally as the depth of the corrosion deepens.

In other words, it has the same effect as erosion in nature,
Recesses 15 formed on the surface of the plate material 10 after being etched
has a curved cross section as shown in FIG.

In order to physically perform the relative movement, for example, as shown in FIG. 9, the corrosive liquid A is injected from the stationary nozzle B, and the plate material 10 having the exposed metal portion 14 is moved in a predetermined direction. It is sufficient if the corrosion liquid is allowed to advance into the sprayed corrosive liquid.

In this way, the corrosive liquid impinges uniformly on the surface of the plate material 1O, and the bay-shaped recess 15 can be etched in a short time.

After the etching process is completed, the remaining photoresist film 11 is removed.

Then, as shown in FIG. 11, a convex projection 4 is formed between adjacent bay-shaped recesses 15.

In this way, it is possible to produce a plate-attached body 3 having a large number of protrusions 4 formed on its surface.

Next, the outer diameter is 14.6 ym, the inner diameter is 10.0 m, and the length is 30.
The plated body 3 provided with the protrusions 4 is attached to the outer periphery of a steel base 2 having a length of 0 m with an adhesive layer 9 interposed therebetween, as shown in FIG.

Then, the metal roller 1 shown in FIGS.
become.

The top surface 5 of the protrusion 4 of the metal roller 1 remains flat even after being wrapped around the base body 2.

As mentioned above, in the case of the plate-attached body 3 having the protrusions 4 of the metal roller l, the photoresist film 11 is left on the surface of the plate material 10 at the locations corresponding to the protrusions using a photographic method, but the present invention is not limited thereto. , it is also possible to rely on printing methods.

In other words, this method uses corrosion-resistant ink and a printing plate instead of the photoresist film 11 and photomask 12 of the photographic method, and prints the corrosion-resistant ink on the portions corresponding to the protrusions on the surface of the plate material 10 using a well-known precision printing machine. It is something that adheres to the surface.

Figure 13 shows an example of a precision printing machine, with 20
is a printing original plate (silk original plate in this example), 21 holes are formed in the original printing plate 20 by a conventional method, 22 is corrosion-resistant ink, 23% is 23, and the brush 23 is moved in parallel in one direction. At the same time, the plate material 10 is made to come into contact with the original printing plate 20.

Therefore, the corrosion-resistant ink 22 that has passed through the holes 21 of the printing original plate 20 while being smoothed by the brush 23 is printed and adhered to the surface of the plate material 10 as shown in FIG. 14 is formed.

Thereafter, the exposed metal portion 14 is etched with the etching liquid A according to the etching method described above, and the remaining corrosion-resistant ink 22 is removed after the etching process is completed, and the plate with the protrusions 4 shown in FIG. 11 is formed. Becomes mother body 3.

In the previous embodiment, the rectangular plate base 3 having the protrusions 4 was wound around the base 2, but the present invention is not limited to this. For example, the plate base 3 may be wound spirally as shown in FIG. 15. good.

In the previous example, the shape of the base body 2 was cylindrical, but
The shape is not limited to this, and may be tapered as shown in FIG. 16, for example. Further, it may be a cylindrical shape or a tapered shape that is integral with the shaft 8.

In the previous embodiment, the plate base 3 with the protrusions 4 and the base 2 were attached using the adhesive layer 9, but the attachment is not limited to this, and may be attached by, for example, welding or hooking.

FIG. 17 shows an example of the case where the base 2
Dovetail grooves in the axial direction are cut at predetermined angles on the outer periphery of the plate.On the other hand, by bending both ends of the plate base 3 provided with the protrusions 4 and inserting such a piece into the dovetail grooves. The plate base body 3 and the base body 2 can be integrated.

In the previous embodiment, the material of the base 2 is made of metal, but it is not limited to this, and may be made of synthetic resin, for example.

In the previous embodiment, the protrusions 4 were arranged in a predetermined arrangement, but the arrangement is not limited to this, and a random arrangement may be used.

In the previous embodiment, the top surface 5 of the protrusion 4 was a smooth surface, but the top surface 5 is not limited to this and may be a rough surface as shown in FIG.

When the top surface 5 is a rough surface, the frictional resistance is further improved due to the extremely fine unevenness.

This can be easily produced by using a plate material 10 with a roughened surface as the starting material, as shown in FIG. When the surface of the plate material 10 is rough, the surface area increases, so that the photoresist film 11 and the corrosion-resistant ink 22 can be reliably adhered, and the subsequent etching can be performed satisfactorily.

In the previous embodiment, the plate base 3 provided with the protrusions 4 is not subjected to any heat treatment, but the present invention is not limited to this, and for example, only the surface layer portion with the protrusions 4 or the entire surface may be heat-treated and hardened. can. In this way, the hardness of the protrusions 4 is particularly increased and the life span can be significantly extended.

In the previous embodiment, the feed roller was used for the feed device, but it is not limited to this, and for example, the roller of casters or door wheels,
There is no problem even if it is used as a roller for a roller conveyor.

(Effects of the Invention) As described above, according to the present invention, the following effects can be achieved. X-Tsume J-Yada also uses yarn-dyed Ichimu Yafusu (1) Frictional resistance can be greatly increased.

This is because the angle between the top surface and the side surface of the protrusion is made acute.

As a result, when used, for example, as a feed roller for feeding paper, the grip with the paper is extremely good, making it possible to reliably feed the paper with high precision.

Conventional metal rollers have protrusions formed by knurling using a die or cutting using a cutter or cutting tool, but since it is necessary to remove the tool during machining, the top and side surfaces of the protrusions are The maximum angle formed by this is a right angle, and no smaller acute angle could be made.

(2) The product price can be lowered.

Conventional metal rollers relied on so-called mechanical processing such as knurling and cutting, which took a lot of time and effort, but the metal roller of the present invention has a plate base with protrusions. This is because it is produced by so-called chemical processing such as photo-etching, which saves time and effort, and enables mass production.

In particular, since the plate material and the corrosive liquid are physically moved relative to each other while being chemically corroded, the speed of corrosion is increased, contributing to a reduction in time.

(3) The protrusion will not be deformed or broken.

This is because protrusions of the same quality are integrally provided on the outer surface of the metal plate base body, and also because the protrusions are formed by chemical processing.

Conventional metal rolls have protrusions formed through so-called mechanical processing such as knurling and cutting, so stress tends to remain after the processing, which can cause the protrusions to deform or break. I was probably used to doing that.

(4) The protrusions can be arranged randomly.

This is because the protrusions are formed through chemical processing.

As a result, when feeding paper, for example, the protrusion comes into contact with the latch, thereby preventing damage to the paper.

Conventional metal rollers have relied on so-called mechanical processing, and have only been able to form protrusions in a predetermined arrangement.

(5) The top surface shape of the protrusion can be made into a shape other than rhombus or rectangle.

This is because the protrusions are formed through chemical processing.

Since conventional metal rollers rely on so-called mechanical processing, the shape of the top surface of the protrusion cannot be made circular, for example, but is always rhombic or rectangular.

(6) The material of the base body can be made different from that of the plate base body provided with projections.

This is because the plate base body provided with projections is attached to the base body.

If the base material is made of a light material such as aluminum alloy or synthetic resin, the total weight of the metal roller can be reduced. On the other hand, the total weight can be increased, and can be easily changed depending on the application.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing the entire metal roller according to an embodiment of the present invention. FIG. 2 is a partially enlarged vertical sectional view. FIG. 3 is a perspective view showing an enlarged portion of the protrusion. FIG. 4 to FIG. 11 are explanatory diagrams showing a method of manufacturing a plate base body provided with projections. FIG. 12 is a perspective view showing a state in which a plate base body provided with projections is wound around a base body to form a metal roller. FIG. 13 and FIG. 14 are explanatory views showing another method of manufacturing a plate base body provided with projections. FIG. 15 is a schematic perspective view showing a case in which a plate base body provided with protrusions is spirally wound around a base body. FIG. 16 is a schematic perspective view showing a case where the metal roller is tapered. FIG. 17 is a schematic perspective view showing a case where a plate base body provided with projections is attached to a base body by hooking. Figure 18 shows a metal PI with a roughened top surface.
2rrV1 Ishidate 1y? ↓m IE & Flat No. 19
The figure is an enlarged vertical cross-sectional view of the main part of a plate material with a rough surface. 1...Metal roller 2...Base 3...Plate Base 4...Protrusion 5...Top surface 6... ...Side surface α...Angle Fig. 72 Fig. 76 Fig. 77 Fig. 78 Fig. 79

Claims (1)

[Claims] A base body with a circular cross section, a metal plate matrix fixed to the outer surface of the base body, and a uniform plate having a top surface and side surfaces integrally formed on the outer surface of the plate base, with the angles formed by these forming an acute angle. A metal roller characterized by having minute protrusions.