JPH08277833A - Rubber coated roller and rubber layer separator - Google Patents

Abstract

PURPOSE: To provide a rubber coated roller capable of separating a rubber layer from a core bar efficiently surely with a simple method. CONSTITUTION: Rotary shafts 4a, 4a are projected from both ends of a cylindrical core bar 1 and the peripheral surface of the core bar is coated with a rubber layer in a rubber coated roller. Both ends of the rubber layer are projected axially of the core bar from both ends of the core bar by forming the rubber layer longer than the core bar. In this rubber coated roller, high pressure air can be surely taken in the connection of the rubber layer with the core bar by the projecting rubber layer portion from the end of the core bar, so that the rubber layer can be easily separated from the core bar by drawing the core bar out of the rubber layer.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a copying machine, printer, FA
The present invention relates to a rubber-covered roller provided in an image forming apparatus such as X and a device for separating a rubber layer of the rubber-covered roller from a core metal.

[0002]

2. Description of the Related Art The rubber-coated roller is a cylindrical cored bar having a rotary shaft protruding from both ends thereof and a rubber layer covering the peripheral surface of the cored bar. As a method of manufacturing such a rubber-coated roller, (1) a press vulcanization method in which sheet-like rubber is sandwiched between upper and lower parts of a cored bar and placed in a mold, and heated, (2) a rubber roll formed into a bamboo ring core is used. There are a steam vulcanization method of press-fitting into gold, putting in a kettle and heating, and (3) a press-fitting method of press-fitting a bamboo ring-shaped rubber roll into a core metal. Which manufacturing method is to be adopted is usually determined by the required quality of the rubber-coated roller, but recently, due to technological progress and for the purpose of cost reduction, the above-mentioned press-fitting method has been widely adopted.

By the way, in recent years, for the purpose of preserving the global environment, recycling of resources and recovery by a person in charge of products have been actively carried out. From such a background, it is desirable to separate the rubber layer from the rubber-coated roller, collect the core metal, and reuse it.

That is, in the above rubber-coated roller, the quality of the rubber layer deteriorates with time (frequency of use, period of use, etc.), but the cored bar has some durability but is more durable than the rubber layer. . Therefore, if the rubber layer of the used rubber-coated roller is separated from the core metal, and the core metal is collected and reused, not only the purpose of resource recycling can be achieved but also the cost increase of the rubber-coated roller can be suppressed. it can.

Incidentally, as a technique for collecting and reusing the components provided in the image forming apparatus, for example, Japanese Patent Laid-Open No. 2-205
Japanese Patent No. 875 discloses a developing device in which a magnet is rotatably supported by a main body of an image forming apparatus and a developing sleeve is integrally formed with a developing unit package, so that the magnet can be reused with a simple structure. . Also,
Japanese Patent Laid-Open No. 3-229286 discloses that a developing magnet in a developing sleeve of a developing device is detachable.
An image forming apparatus is described in which a magnet can be reused in a new developing device or a process cartridge.

[0006]

In the conventional rubber-coated roller shown in FIG. 20, a rubber layer 52 is provided on the outer peripheral surface of a cored bar 51. The end surface of the cored bar 51 is closer to the end surface of the rubber layer 52. It is inside by a minute distance L or is flush with the end surface of the rubber layer 52. In addition, 53 is a rotating shaft. However, in such a rubber-coated roller, it is difficult to separate the rubber layer 52 from the core metal 51, and there has been no method or apparatus capable of separating the rubber layer 52 easily and accurately.
It is conceivable to make a cut in the rubber layer 52 with a cutter or the like and peel the rubber layer 52 from the core metal 51. However, this method is not efficient, and the core metal 51 may be damaged or the rubber layer 5 may be damaged.
There was a problem that part of No. 2 was likely to remain on the surface of the cored bar.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and an object thereof is to provide a rubber-covered roller capable of separating a rubber layer from a core metal efficiently and accurately by a simple method.
Another object of the present invention is to provide a device suitable for carrying out the separating operation. The present invention particularly provides a method and apparatus suitable for separating a rubber layer from a rubber-coated roller manufactured by press-fitting a rubber roll into a core metal.

[0008]

A rubber-covered roller according to a first aspect of the present invention has a cylindrical core metal 1 as shown in FIG. 1, for example.
In the case where the rotating shafts 4a, 4a are projected at both ends of the core bar and the peripheral surface of the core bar 1 is covered with the rubber layer 2, the rubber layer 2 is replaced by the core bar 1.
By making it longer, the end portion of the rubber layer 2 is
It is characterized in that it is made to project outward in the axial direction of the core metal 1 from both ends or one end.

A rubber-covered roller according to a second aspect is characterized in that, for example, as shown in FIG. 3, a tapered portion 5 is provided at the end of the core metal on the side where the rubber layer 2 is projected, as shown in FIG. And

A rubber-covered roller according to a third aspect of the present invention is, for example, as shown in FIG. 5, according to the first or second aspect, the end of the protruding rubber layer is provided at the roller end on the side where the rubber layer 2 is protruded. It is characterized in that a cover member 9 for shutting off the above is detachably provided.

According to a fourth aspect of the present invention, there is provided a rubber layer separating device for a rubber covered roller, wherein pressurized air is supplied to a gap between the rubber layer and the core metal of the rubber covered roller according to the first, second or third aspect. A device for separating the rubber layer from the core metal, for example, as shown in FIG. 14, a tubular guide member 8a.
A through hole 8c is opened in the end plate of the air nozzle, the tip of the cylindrical air nozzle 7 is inserted into the guide member 8a through the through hole, and the air supply side of the air nozzle 7 is evacuated via the air hose 6. It is characterized in that it is connected to the discharge side of the compressor 6.

According to a fifth aspect of the present invention, in the rubber layer separating device for a rubber-coated roller, the air nozzle 7 according to the fourth aspect has a conical member 10 concentrically arranged in the air nozzle 7, as shown in FIG. By providing the air injection passage, the cross-sectional area of the air injection passage is gradually reduced in the air flow direction.

[0013]

In the rubber-coated roller according to the first aspect, high pressure air is supplied to a contact portion between the rubber layer 2 and the end portion of the core metal on the side where the rubber layer is projected, so that the core metal 1 and the rubber layer 2 are separated from each other. The rubber layer 2 can be separated from the core metal 1 by forming a void in the core metal and pulling out the core metal 1 from the rubber layer 2 in this state.

In the rubber-coated roller of the second aspect, high-pressure air is supplied to the taper portion 5 at the end of the core metal so that the high-pressure air is more accurately applied to the contact portion between the end of the core metal and the rubber layer 2. It can be supplied, and the work of pulling out the cored bar 1 becomes easier.

Since the cover member 9 is provided in the rubber-covered roller of the third aspect, when the rubber-covered roller is assembled in the image forming apparatus, the end of the rubber layer 2 is a related component in the image forming apparatus or It will not interfere with each other.

In the rubber layer separating device for the rubber-coated roller according to the fourth aspect, the rubber-coated roller is inserted into the guide member 8a of the device, and the end of the rubber layer on the side protruding from the core metal 1 is cylindrical air nozzle 7. After being inserted into the tip portion of, the high pressure air is supplied from the air compressor 6. As a result, the actions of claims 1 and 2 are obtained.

In the rubber layer separating device for the rubber-coated roller of the fifth aspect, since the cross-sectional area of the air injection passage of the air nozzle 7 is gradually reduced in the air flow direction, the air flow at the tip of the air nozzle 7 is strong. Therefore, the separating action of the rubber layer 2 is enhanced.

[0018]

Next, an embodiment of the present invention will be described. Example 1 In the rubber-coated roller shown in FIG. 1, in which the rotating shafts 4a and 4a are projected at both ends of a cylindrical core metal 1 and the peripheral surface of the core metal 1 is covered with a rubber layer 2, the rubber layer 2 Is formed to be longer than the core metal 1 by a length 2D, so that both ends of the rubber layer 2 are protruded from the both ends of the core metal 1 by D in the axial direction outside of the core metal 1. In this rubber-coated roller, the protruding rubber layer portion from the end portion of the core bar can accurately take in high-pressure air, and the rubber layer 2 can be easily separated. Even when only one end portion of the rubber layer 2 is projected from the end portion of the cored bar, the same operational effect as above can be obtained.

Example 2 In the rubber-coated roller shown in FIG. 2, the shaft-attached flange 4 is formed by the rotating shaft 4a and the flange 4b, and the flange 4b and the core metal body 1a are press-fitted into the pipe 3 to form the core metal 1. It is a thing. The other points are similar to those of the first embodiment.

Example 3 The rubber-coated roller shown in FIG. 3 is obtained by modifying Example 1 so that the rubber layer 2 is projected and the tapered portion 5 is provided at the end of the core metal 1 on the side. The other points are similar to those of the first embodiment.

Example 4 The rubber-covered roller shown in FIG. 4 was obtained by modifying Example 2 so that the flange 4 of the shaft-attached flange 4 on the side where the rubber layer 2 was protruded.
The taper portion 5 is provided at the end of b. The other points are the same as in the second embodiment.

Embodiment 5 Belt photosensitive member 10 of the process cartridge shown in FIG.
The drive roller 102 that rotates 1 is a rubber-covered roller. The belt photosensitive member 101 is provided with a detent guide 106 for preventing the deviating in the thrust direction, and the detent guide 106 is provided on guide rollers 107 provided at both ends of the drive roller 102. By abutting, the structure is such that the deviation of the belt photoconductor 101 in the thrust direction is suppressed to a certain value or less. Therefore, when the rubber-coated roller of FIGS. 1 to 4 is directly incorporated in the process cartridge, the rubber layer of the driving roller 102 and the rubber layer 2 of the rubber-coated roller of FIGS. There is a concern that unevenness may occur, and the photoconductor 101 may be locked by the stopper guide 106.
There is also a risk of overcoming and approaching the thrust direction. In order to solve the above problem, in the rubber covered roller of the present invention shown in FIG. 5, a cover member 9 for blocking the end of the protruding rubber layer 2 from the outside is provided at the roller end on the side where the rubber layer 2 is projected. It is provided detachably. The cover member 9 can be, for example, a resin molded product. In the rubber covered roller of FIG. 5, the cover member 9 is prevented from coming off from the rubber covered roller by providing the E-ring stopper 9a on the rotary shaft 4a.

Example 6 The rubber-coated roller shown in FIG. 6 is a modification of Example 5 in that the groove 1b is provided on the rotary shaft 4a instead of providing the E-ring stopper 9a.
Protrusions 9b are provided on the cover member 9 respectively to cover the cover member 9
The groove 9b can be patched to the groove 1b by the projection 9b.

Embodiment 7 The rubber-coated roller shown in FIG. 7 is designed to enhance the effect of reusing the core metal 1 by preventing the rotation shaft 4a provided at the end of the core metal 1 from being worn. is there. That is, the pair of cutouts 12 is provided at one end of the cylindrical member (for example, made of metal).
By forming c and 12c so as to face each other, the tongue piece 12a is provided and the tongue piece 12a is provided with the potch 12b to form the shaft guide member 12. Further, a through hole 1c is formed in the rotary shaft 4a. Then, utilizing the spring force of the tongue piece 12a, the potch 12b is fitted into the through hole 1c, and the shaft guide member 12 is fixed to the rotary shaft 4a. This makes it possible to prevent the rotation shaft 4a from being worn and prevent the shaft guide member 12 from shifting in the thrust direction of the rotation shaft 4a or rotating in the radial direction. Further, since the tongue piece 12a has a spring force, the rotating shaft 4a
The shaft guide member 12 can be easily attached to and detached from the shaft guide member 12.

Embodiment 8 The rubber-coated roller shown in FIG. 8 has a recess 1d formed in place of the through hole 1c of the rotary shaft 4a in Embodiment 7. The other points are the same as in the seventh embodiment.

Embodiment 9 The rubber-coated roller shown in FIG. 9 is one in which a potch 14a is provided on the inner peripheral surface of the shaft guide member 14, and a clearance is provided between the rotary shaft (not shown) and the shaft guide member 14. If provided, it can be attached and detached even if it is slightly tight. The shaft guide member 14 can be applied when there is some play between the shaft guide member 14 and the rotary shaft.

Embodiment 10 The rubber-coated roller shown in FIG. 10 is the rubber-coated roller of Embodiment 7 in which the shaft guide member 12 is supported by bearings 13.

Embodiment 11 In the rubber covered roller shown in FIG. 11, a projection 15a is provided on the inner peripheral surface of the shaft guide member 15 and in the axial direction thereof, and a groove 16 into which the projection 15a is inserted is provided on the rotary shaft 4a. An E-ring stopper (not shown) insertion groove 17 is formed. In this embodiment, the projection 15a of the shaft guide member 15 is inserted into the groove 16 and the E-ring stopper is inserted into the insertion groove 17, whereby the shaft guide member 15 is fixed to the rotary shaft 4a.

Example 12 In the rubber-covered roller shown in FIG. 12, a D-shaped opening 18a is formed on one side of the shaft guide member 18, and a protrusion 18b having a spring force is provided on the other side, and the rotary shaft 4a is provided with the above-mentioned structure. D type opening 1
8a and a milling surface 19 for fitting 8a, and the projection 18
The insertion groove 20 of b is formed. In this embodiment, the shaft guide member 18 is fitted to the milling surface 19 to prevent the rotation shaft 4a from rotating, and the protrusion 18b is inserted into the insertion groove 20 to prevent the displacement of the rotation shaft 4a in the thrust direction.

Embodiment 13 The rubber layer separating apparatus for a rubber covered roller shown in FIGS. 13 and 14 is a rubber covered roller of the present invention, in which pressurized air is supplied to the gap between the rubber layer 2 and the core metal 1. A device for separating the layer 2 from the core metal 1. That is, the cylindrical guide members 8a and 8b are connected to each other, the through hole 8c is opened in the end plate of the guide member 8a, and the cylindrical air nozzle 7 is inserted through the through hole.
The tip end of the air nozzle 7 is inserted and projected into the guide member 8a to be fixed, and the air supply side of the air nozzle 7 is connected to the discharge side of the air compressor 6 via the air hose 6a. When using this rubber layer separating device, as shown by the chain double-dashed line in FIG. 14, a rubber covered roller is inserted into the guide member 8a, and the end of the rubber layer 2 on the side protruding from the core metal 1 is blown with air. After inserting into the tip of the nozzle 7,
High-pressure air is supplied from the air compressor 6. As a result, as shown in FIG. 15, high-pressure air is supplied between the core metal 1 and the rubber layer 2 via the tapered portion 5 of the core metal 1, and the gap between them is enlarged, so that the core metal 1 is It can be easily pulled out from the rubber layer 2.

Example 14 In the rubber layer separating apparatus shown in FIG. 16, the conical member 10 is concentrically provided in the air nozzle 7 so that the cross-sectional area of the air injection passage is changed to that of air as shown in FIG. It is gradually reduced in the flow direction. In this case, as shown in FIG. 17, the through holes 7a are formed at 90 ° intervals on the peripheral wall of the air nozzle 7.
7b, 7a, 7b are formed in this order, and the through holes 10a, 1 are formed in the peripheral wall of the conical member 10 at 90 ° intervals corresponding to the through holes.
0b, 10a, 10b are formed in this order. Then, the conical member 10 is concentrically inserted into the air nozzle 7, and the pin 1
1 in the order of through holes 7a, 10a, 10a, 7a,
After inserting another pin in the order of 7b, 10b, 10b, 7b (the two pins intersect in a cross shape), these pins are caulked or screwed. In this embodiment, as is clear from FIG. 18, since the air flow at the tip of the air nozzle 7 becomes strong, the core metal 1 can be pulled out more accurately.

The rubber-coated roller of the present invention preferably has a service life shorter than that of the process unit or the image forming apparatus main body. The reason is that the rubber-coated roller according to the present invention has an order of magnitude more production than the rubber roller provided in the process unit or the main body of the image forming apparatus. Therefore, by reusing the core metal, a significant cost reduction can be achieved. This is because it can be achieved.

[0033]

As is apparent from the above description, claim 1
According to the rubber-coated roller described in (1), high-pressure air is supplied to the contact portion between the end of the cored bar and the rubber layer, and the cored bar is pulled out of the rubber layer, so that the rubber layer is easily and accurately separated from the cored bar. be able to. According to the rubber-coated roller of claim 2, by supplying high-pressure air to the tapered portion of the end portion of the core,
Since the high pressure air can be more accurately supplied to the contact portion between the end portion of the core metal and the rubber layer, the work of pulling out the core metal can be performed more accurately. According to the rubber covered roller of the third aspect, since the predetermined cover member is provided, when the rubber covered roller is assembled in the image forming apparatus, the end portion of the rubber layer becomes the related parts or members in the image forming apparatus. They do not interfere with each other, and the problems associated with the rubber layer protruding from the end of the cored bar are eliminated. In other words, in the case where the rubber layer is not end faced in terms of the function of the component and the end face of the portion corresponding to the core metal part is required, by providing a predetermined cover member, the same function as when the rubber layer is not the end face is provided. Then, the rubber layer can be separated from the core metal by removing the cover member. In the rubber layer separating apparatus according to claim 4, a rubber-coated roller is inserted into the guide member of the apparatus, the end of the rubber layer is inserted into the tip of the cylindrical air nozzle, and then high-pressure air is supplied from the air compressor. By doing so, the rubber layer can be easily and accurately separated from the core metal. According to the rubber layer separation device of claim 5, since the cross-sectional area of the air injection flow path in the air nozzle is gradually reduced in the air flow direction, the air flow at the tip of the air nozzle becomes stronger. The separation can be performed more accurately.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of a rubber covered roller according to the present invention.

FIG. 2 is a vertical sectional view showing a second embodiment.

FIG. 3 is a vertical sectional view showing a part of the third embodiment.

FIG. 4 is a vertical sectional view showing a part of a fourth embodiment.

FIG. 5 is a vertical sectional view showing a fifth embodiment.

FIG. 6 is a vertical sectional view showing a part of a sixth embodiment.

FIG. 7 is a perspective view showing a part of the seventh embodiment.

FIG. 8 is a perspective view showing a part of the eighth embodiment.

FIG. 9 is a perspective view showing a part of the ninth embodiment.

FIG. 10 is a vertical sectional view showing a part of the tenth embodiment.

FIG. 11 is a perspective view showing a part of the eleventh embodiment.

FIG. 12 is a perspective view showing a part of the twelfth embodiment.

FIG. 13 is a schematic perspective view showing an embodiment of a rubber layer separating device according to the present invention.

FIG. 14 is a vertical cross-sectional view showing the structure of the apparatus shown in FIG. 13 and a procedure for separating a rubber layer by the apparatus.

FIG. 15 is a vertical sectional view showing the operation of the apparatus shown in FIG.

FIG. 16 is a partial perspective view showing another example of the rubber layer separating device.

FIG. 17 is a vertical cross-sectional view showing the method of assembling the apparatus shown in FIG. 16;

18 is a vertical sectional view showing the operation of the apparatus shown in FIG.

FIG. 19 is a perspective view showing a part of an image forming apparatus including a belt photosensitive member.

FIG. 20 is a vertical sectional view showing a conventional rubber-coated roller.

[Explanation of symbols]

 1 core metal 1a core metal body 1b groove 1c through hole 1d recessed portion 2 rubber layer 3 pipe 4 flange with shaft 4a rotary shaft 4b flange 5 taper portion 6 air compressor 6a air hose 7 air nozzle 7a, 7b through hole 8a, 8b guide member 8c Through hole 9 Cover member 9a E-ring stop 9b Protrusion 10 Conical member 10a, 10b Through hole 11 Pin 12 Shaft guide member 12a Tongue piece 12b Poch 12c Notch portion 13 Bearing 14 Shaft guide member 14a Poch 15 Shaft guide member 15a Protrusion 16 Grooves 17 Insertion Grooves 18 Shaft Guide Members 18a D-Type Openings 18b Protrusions 19 Milling Surfaces 20 Insertion Grooves 51 Core Metals 52 Rubber Layers 53 Rotating Shafts 101 Belt Photosensitive Body 102 Driving Rollers 106 Offset Stop Guides 107 Guide Rollers

Claims (5)

[Claims] 1. A cylindrical cored bar having a rotary shaft projecting from both ends thereof and a rubber layer covering the peripheral surface of the cored bar,
A rubber-coated roller characterized in that an end portion of the rubber layer is projected from both ends or one end portion of the cored bar to the outside in the axial direction of the cored bar. 2. The rubber-coated roller according to claim 1, wherein a taper portion is provided at an end portion of the core metal on the side where the rubber layer is projected. 3. The roller member on the side where the rubber layer is projected is detachably provided with a cover member for blocking the end of the protruding rubber layer from the outside. The rubber-coated roller described. 4. An apparatus for separating the rubber layer from the core metal by supplying pressurized air into a gap between the rubber layer and the core metal of the rubber-coated roller according to claim 1, 2, or 3. A through hole is formed in the end plate of the tubular guide member, the tip of the cylindrical air nozzle is inserted into the guide member through the through hole, and the air supply side of the air nozzle is passed through an air hose. A rubber layer separating device for a rubber-covered roller, which is connected to the discharge side of an air compressor. 5. The rubber layer separating device for a rubber-covered roller according to claim 4, wherein the air nozzle is one in which a cross-sectional area of the air injection passage is gradually reduced in the air flow direction.