JP2001030373A - Manufacture of elastic foam roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an elastic foam roller on a single device and simply in a few manhours. SOLUTION: A slender elastic foam 1 is compressed in an axial direction to the fixed side by a compressing member 9 in a frame coinciding with the outer peripheral shape of the foam 1, and a first cylindrical blade is thrust into the foam 1 along the axial line of the compressed foam 1 so that it is perforated. Further, a shaft 10 is inserted into a shaft hole formed by pulling out the first cylindrical blade in such a state that the foam 1 is compressed, and the outer periphery of the elastic foam 1 compressed is cut into a cylindrical shape with the help of a second cylindrical blade 11 which slides to fit the outer periphery of the compressing member 9. Next, the second cylindrical blade 11 and the compressing member 9 are removed from the elastic foam 1 and the shaft 10 and the elastic foam 1 is restored to its pre-compression length along the shaft 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an elongated elastic foam roller, and more particularly to a method for producing an elastic foam roller such as urethane foam used for a paper feed roller or a toner supply roller of office equipment such as a copying machine or a printer. The present invention relates to a roller manufacturing method.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture a roller made of an elastic foam such as urethane foam, an elastic foam having a prismatic shape, that is, a square cross section, is provided with a shaft hole in the axis thereof in a compressed state. Then, after removing the elastic foam from the drilling device and once expanding it, compress it again if necessary, insert the shaft into the shaft hole, and then grind it with a cylindrical grinder or grind it with a peeling machine. It is cut and finished to cylindrical outer dimensions.

[0003]

In the above-described conventional method, the drilling operation, the shaft insertion operation, and the outer shape forming operation are performed independently of each other by separate devices. There is a problem that many and large devices are required.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and an elastic foam roller is provided on a single device.
It is another object of the present invention to provide a method of manufacturing an elastic foam roller which can be easily manufactured with a small number of steps.

[0005]

According to the present invention, the above-mentioned problem is solved as follows. (1) An elongated elastic foam is axially compressed with respect to a fixed side by a compression member movable along an axis in a frame conforming to the outer peripheral shape, and the axis of the elastic foam compressed in this manner. The drilling tool is pushed in along with the drilling tool, and while the drilling tool is being pulled out or withdrawn, the shaft is inserted into the shaft hole formed therein while the elastic foam is compressed, and the frame is inserted. The body is removed from the outer periphery of the elastic foam, and the outer periphery of the elastic foam in the compressed state is cut into a cylindrical shape by a cylindrical blade for forming an outer shape which is slidably fitted on the outer periphery of the compression member. Cutlery,
And removing the compression member from the elastic foam and the shaft to return the elastic foam to a length before compression along the shaft.

(2) In the above item (1), a shaft is inserted into a shaft hole formed in the compressed elastic foam through a shaft hole formed in the compression member.

(3) In the above item (1), the shaft is inserted into the shaft hole formed in the compressed elastic foam through the shaft hole formed on the fixed side.

(4) In any one of the above items (1) to (3), the shaft is inserted into the shaft hole of the elastic foam at the same time that the drilling tool is removed from the elastic foam.

(5) In the above item (4), the drilling tool and the shaft are moved in the axial direction at a constant speed while the tip of the drilling tool and one end of the shaft are in contact with or close to each other.

(6) In any one of the above items (1) to (5), the drilling tool is a small-diameter cylindrical blade similar to a cylindrical blade for forming an outer shape.

(7) In any one of the above items (1) to (5), the drilling tool is a drill.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the following embodiments of the method of the present invention, it is assumed that an elongated prismatic, that is, a square cross-section urethane foam semi-finished product (hereinafter referred to as a roller semi-finished product) is used as the elastic foam.

As shown in FIG. 1, a roller semi-finished product (1) to be processed has two upper and lower frame members (2) and (2) each having an inner surface conforming to the outer peripheral shape of the square cross section. ). In FIG. 1, the two frames (2) and (2) are in an open state, and the left end of the semifinished roller (1) slides a first cylindrical cutting tool (3) as a drilling tool at the center. It is brought into contact with a fixing member (5) having a shaft hole (4) to be movably inserted therethrough.

A shaft portion (7) having a shaft hole (6) having the same diameter as the shaft hole (4) is provided on the right side of the frame (2), and the outer diameter of the roller to be formed is provided on the left end. Cylindrical head with outer diameter equal to
A compression member (9) having (8) is arranged.

Next, as shown in FIG.
(2) Close (2) to each other as shown by the arrow, and
(9) is fixed on the fixed side, that is, the fixing member in the closed frame (2).
By moving the roller semi-finished product (1) toward the (5) side in the axial direction, the semi-finished roller (1) is compressed between the fixing member (5) and the head (8) of the compression member (9). The amount of compression is such that, for example, a roller semi-finished product having a length of 250 mm in the axial direction is compressed to a length of 35 mm.

As shown in FIG. 3, the first cylindrical cutting tool (3) inserted through the shaft hole (4) of the fixing member (5) is located at the center of the roller semi-finished product (1) compressed in the axial direction. ) Is perforated by pushing in while rotating.

After finishing the perforation, as shown in FIG. 4, the first cylindrical cutting tool (3) is pulled out, and the compressed member (9) is inserted into the shaft hole of the roller semi-finished product (1) while being compressed. Shaft (7)
The shaft (10) is inserted through the shaft hole (6).

At this time, the tip of the first cylindrical blade (3) and the left end of the shaft (10) are brought into contact with each other or brought close to each other, and while the first cylindrical blade (3) is being pulled out. , Axis (10)
Is inserted into the shaft hole of the semi-finished roller (1) at a constant speed, so that the operation can be performed smoothly.

Next, as shown in FIG. 5, the frames (2) and (2)
Is opened and removed from the outer periphery of the roller semi-finished product (1), but the axial compression of the roller semi-finished product (1) by the compression member (9) is kept as it is.

Next, a second cylindrical blade (11) whose inner surface matches the outer periphery of the head (8) of the compression member (9) is slidably inserted outside the head (8). As shown in FIG. 6, this is pushed into the fixed side, and the outer periphery of the semi-finished roller product (1) having a square cross section is cut into a cylindrical shape.

The second cylindrical blade (11) is preferably pushed in while being rotated. However, if it is difficult to rotate, it may be pushed in as a cylindrical cutter without rotating.

Finally, the second cylindrical cutter (11) is moved to the head.
When the compression member (9) is pulled out after being removed to the right from (8) (or while attached to the head (8)), the compressed elastic foam (1) moves on the shaft (10). Returning to the right and returning to the original length, when this is removed from the fixing member (5) together with the shaft (10), the elastic foam roller (12) shown in FIG. 7 is obtained.

In the above embodiment, the shaft (10) is
The shaft (10) was introduced through the shaft hole (6) of (9).
It can also be introduced through the shaft hole (4) of the fixing member (5) after pulling out (3). In addition, the cylindrical blade (3) is compressed by a compression member.
You may insert it while rotating from the shaft hole (6) of (9). Further, instead of the cylindrical cutting tool (3), a known twist drill can be used as a drilling tool.

[0024]

According to the first aspect of the present invention, the compression hole drilling, the shaft mounting, and the outer shape forming processing can be performed by a single device while maintaining the compressed state. Upon returning from the compressed state, the elastic foam roller is automatically completed, which makes it possible to realize a simple and inexpensive manufacturing method of the elastic foam roller. Further, since the outer shape is formed in a state where the shaft is passed through the shaft hole of the elastic foam, a beautiful outer shape can be formed without the occurrence of centering or the like.

According to the second aspect of the present invention, the shaft can be prepared in advance in the shaft hole of the compression member.

According to the third aspect of the present invention, since the shaft is inserted from where the drilling tool has been pulled out, the shaft is smoothly introduced into the elastic foam without any catching.

According to the fourth and fifth aspects of the present invention, the shaft can be smoothly inserted into the elastic foam.

According to the sixth aspect of the present invention, a shaft hole can be quickly formed in the elastic foam.

According to the present invention, a beautiful shaft hole can be accurately and reliably opened in the elastic foam.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a semifinished roller, a frame, a fixing member, and a compression member illustrating a first step of the method of the present invention.

FIG. 2 is a similar view for explaining a next compression step.

FIG. 3 is a similar view for explaining a shaft hole forming step.

FIG. 4 is a similar view for explaining a shaft introduction step.

FIG. 5 is a similar view for explaining a stage before cutting the outer periphery of the roller semi-finished product.

FIG. 6 is a similar view for explaining a state in which the outer periphery of a semi-finished roller is cut into a cylindrical shape.

FIG. 7 is a side view of the completed elastic foam roller.

[Explanation of symbols]

 (1) Roller semi-finished product (elastic foam) (2) Frame (3) Cylindrical blade (drilling tool) (4) Shaft hole (5) Fixing member (6) Shaft hole (7) Shaft (8) Head Part (9) Compression member (10) Shaft (11) Cylindrical blade (12) Elastic foam roller

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03G 15/08 501 G03G 15/08 501A // B29K 105: 04 F-term (Reference) 2H072 JC02 JC06 2H077 AA15 AC04 FA00 FA22 3F049 CA16 LA02 3J103 AA02 EA02 EA03 FA15 GA02 GA33 GA57 GA58 HA03 HA12 HA18 HA48 4F213 AA45 AD03 AD15 AH04 WA03 WA39 WA54 WA63 WA64 WB01 WB18 WC02 WF05 WF37 WK05 WW01 WW24 WW25 WW33

Claims (7)

[Claims] 1. An elastic foam which is compressed in an axial direction with respect to a fixed side by a compression member which can move along an axis in a frame body conforming to the outer peripheral shape of the elongated elastic foam. The drilling tool is pushed in along the axis to pierce, while the drilling tool is being pulled out or after being pulled out, the shaft hole formed therein is inserted into the shaft while the elastic foam is compressed, The frame is removed from the outer periphery of the elastic foam, and the outer periphery of the compressed elastic foam is cut into a cylindrical shape by a cylindrical blade for forming an outer shape that is slidably fitted to the outer periphery of the compression member, An elastic foam roller comprising: removing the cylindrical blade and the compression member from the elastic foam and the shaft; and returning the elastic foam to a length before compression along the axis. Manufacturing method. 2. The method for producing an elastic foam roller according to claim 1, wherein a shaft is inserted into a shaft hole formed in the compressed elastic foam through a shaft hole formed in the compression member. 3. The method for producing an elastic foam roller according to claim 1, wherein a shaft is inserted into a shaft hole formed in the compressed elastic foam through a shaft hole formed on a fixed side. 4. The method for producing an elastic foam roller according to claim 1, wherein the shaft is inserted into a shaft hole of the elastic foam at the same time as the removal of the perforating tool from the elastic foam. 5. The method for producing an elastic foam roller according to claim 4, wherein the drilling tool and the shaft are moved in the axial direction at a constant speed while the tip of the drilling tool and one end of the shaft are in contact with or close to each other. 6. The method for producing an elastic foam roller according to claim 1, wherein the drilling tool is a small-diameter cylindrical blade similar to a cylindrical blade for forming an outer shape. 7. The drilling tool according to claim 1, wherein the drilling tool is a drill.
The method for producing an elastic foam roller according to any one of the above.