JPH0564156U - roller - Google Patents

Abstract

(57) [Summary] [Structure] The bearing member 4 is fixed to both ends 2a of the shaft member 2 with the cylindrical soft rubber 3 interposed. Further, a plurality of recessed grooves 5b are provided on the inner peripheral surface 5a of the cylindrical member 5 formed of an elastic material such as rubber or synthetic resin which is fixed by penetrating the shaft member 2. [Effect] The roller 1 does not generate vibration even when an impact is applied from the outside, hardly emits an impact sound, and does not generate a resonance sound and is not adversely transmitted to other parts of the device. Further, the roller 1 can be made lightweight and can be reduced in cost, and can be used for various automation devices.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a roller used for office equipment such as a printer, a facsimile, a typewriter, a word processor, and a telex, and other automation equipment.

[0002]

[Prior Art]

 In recent years, automation has rapidly progressed in many fields, and new automation equipment such as office equipment for office automation exemplified above has been developed and widely used. Many rollers are used as important parts for performing printing and other operations.

FIG. 9 is a cross-sectional view showing an example of a conventional roller, and the cross section shown in the center is a cross section perpendicular to the cross sections shown on both sides. In FIG. 9, 11 is a roller, 12 is a cylindrical member, 13 is a shaft member, and the roller 11 is a metal rod at the axial center of the cylindrical member 12 made of an elastic material such as rubber or synthetic resin. The formed shaft member 13 is fixed by penetrating it. Further, the roller 11 is mounted on an apparatus and rotated by using both end portions 13a of the shaft member 13 as bearing portions.

In this structure, when the cylindrical member 12 of the rotating roller 11 receives an impact from the outside due to the action of paper feeding, printing, etc., the roller 11 vibrates and makes a vibrating sound. The vibration of 11 is transmitted to the other parts of the device via the bearings of both ends 13a of the shaft member 13, and has a problem that a resonance sound is generated or a bad influence is exerted. Further, since the roller 11 having this structure is relatively heavy, it is desired to make it lighter, and the cost reduction of the roller 11 greatly contributes to the cost reduction of the equipment in which the roller 11 is mounted. Have

[0005]

[Problems to be solved by the device]

 The present invention was developed to solve the above-mentioned problems, and has a great effect of silencing, and does not cause a resonance sound to be transmitted to other parts of the equipment to which it is attached, and does not have a bad influence. It is also for providing a lightweight and inexpensive roller.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has a roller configured as follows. That is, the bearing member was fixed with the cylindrical soft rubber interposed at both ends of the shaft member. In this case, the cylindrical soft rubber may be fixed to the reduced diameter end portions of the shaft member.

Further, even if the shaft member is formed of a metal rod or a metal tube or a paper tube and both end members fixed to both ends thereof, both ends of the metal tube are subjected to plastic working to be compressed. The shaft member may be formed to have a diameter so as to form the both end portions, and it is preferable to pack a granular or powdery substance inside these shaft members.

Further, the cylindrical member formed of an elastic material such as rubber or synthetic resin, which is fixed by penetrating the shaft member, has a plurality of recesses on the inner peripheral surface or between the outer peripheral surface and the inner peripheral surface. It is advisable to provide a plurality of cavities in the. The recess may be a groove parallel to the axis of the cylindrical member or a groove formed in a spiral shape, and the cavity is a hole parallel to the axis of the cylindrical member. Or, it may be a spirally formed hole, and the concave portion or the cavity may be filled with a granular or powdery substance. Furthermore, the shaft member may be inserted and fixed through a soft rubber interposed in a cylindrical member formed of an elastic material such as rubber or synthetic resin. The various cylindrical members described above may be separated into a plurality of pieces.

[0009]

[Action]

 Since the roller of the present invention is constructed as described above, it operates as follows. First, since the bearing member is fixed by interposing the cylindrical soft rubber on both ends of the shaft member, the impact that the cylindrical member of the roller receives from the outside and the vibration of the roller caused by the impact are softened. Since the rubber absorbs and does not transmit it to the bearing member, resonance noise is not generated or adversely affected in other parts of the device. In this case, if the cylindrical soft rubber is fixed to both ends of the shaft member having different diameters or annular groove diameters, the bearing member becomes compact rather than having a large diameter.

Further, when the shaft member is formed of a metal rod, it becomes a strong roller and is formed of a metal tube or a paper tube and both end members fixed to both ends thereof, or both ends of the metal tube are subjected to plastic working. When the diameter is reduced, the roller becomes lighter, and when the roller is formed of a paper tube, the paper tube also acts to absorb the shock and vibration transmitted from the cylindrical member. Furthermore, when a granular or powdery object such as iron powder is packed inside a metal tube or a paper tube, this absorbs shocks and vibrations, so that the effects of sound deadening and vibration damping are further enhanced. A roller formed by subjecting both ends of the above metal pipe to plastic processing to reduce its diameter has a large space in the portion of the metal pipe that does not reduce its diameter, which makes the roller even lighter, such as rubber and synthetic resin. Since the cylindrical member made of the elastic material is thin, the cost is reduced. It should be noted that it is an extremely easy operation to plastically reduce the diameter of a metal pipe.

Next, a cylindrical member formed of an elastic material such as rubber or synthetic resin, which is fixed by penetrating the shaft member, is provided with a plurality of recesses on the inner peripheral surface, or is formed on the outer peripheral surface and the inner peripheral surface. If a plurality of cavities are provided between the hollows, these recesses or cavities absorb impacts received by the cylindrical member from the outside and vibrations of the cylindrical member caused by the impacts, so that almost no impact noise is generated. Further, the vibration of the cylindrical member is prevented from being transmitted to other parts of the device via the shaft member to generate a resonance sound or exert a bad influence. If the recess is a groove parallel to the axis of the cylindrical member or a spiral groove, or if the cavity is a hole parallel to the axis of the cylindrical member or a spiral hole, the mold for the cylindrical member can be easily manufactured. Therefore, it is easy to mold the cylindrical member. Further, when these concave portions or cavities are filled with granular or powdery objects such as iron powder, they absorb shocks and vibrations better, which further increases the effects of sound deadening and vibration damping.

Further, when the shaft member is inserted and fixed with the soft rubber interposed in the cylindrical member formed of an elastic material such as rubber or synthetic resin, the soft rubber is subjected to the shock received by the cylindrical member and the vibration of the cylindrical member due to the shock. Absorbs and produces almost no impact noise, and resonance noise is not generated or adversely affected in other parts of the equipment. Furthermore, even for a paper feed roller having a plurality of separated cylindrical members, by constructing as described above, the noise and vibration of the roller can be suppressed, and resonance noise may be generated in other parts of the device. It will not be adversely affected.

[0013]

【Example】

 An embodiment of the roller of the present invention will be described below with reference to the drawings. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7 and FIG. 8 are sectional views showing the embodiment of the roller of the present invention, respectively, The cross section shown in is a cross section perpendicular to the cross sections shown on both sides. 1 to 8, 1 is a roller, 2 is a shaft member, 3 is a cylindrical soft rubber, 4 is a bearing member, and all of the embodiments shown in FIGS. The roller 1 has a bearing member 4 fixed to both ends 2a with a cylindrical soft rubber 3 interposed.

In the embodiment shown in FIGS. 1, 3, 4, and 5, the bearing member 4 has a cylindrical portion 4a and a disc-shaped portion 4b which are integrally formed, and is shown in FIG. In the embodiment, the cylindrical portion 4a and the disc-shaped portion 4b are separately formed and fixed. Further, in the embodiments shown in FIGS. 6, 7 and 8, the bearing member 4 is formed only by the cylindrical portion. The cylindrical soft rubber 3 and the both ends 2a of the shaft member 2 and the soft rubber 3 and the bearing member 4 are fixed to each other by press fitting or adhesion.

Both ends 2a of the shaft member 2 are, in the embodiment shown in FIGS. 1, 2 and 4, reduced in diameter by processing the shaft member 2 of a metal rod into different diameters. In the embodiment shown in FIG. 5, the shaft member 2 is formed of a metal tube or a paper tube 2b and both end members 2c fixed to both ends thereof, and the both end members 2c are processed into different diameters to reduce the diameter. Further, in the embodiment shown in FIG. 6, the shaft member 2 is formed of a metal tube, and both ends 2a of the shaft member 2 are formed by subjecting the metal tube to plastic working to reduce the diameter. In the embodiment shown in Fig. 2, both ends 2a or both ends 2c are processed into an annular groove to reduce the diameter. As described above, in all of the embodiments shown in FIGS. 1 to 8, the cylindrical soft rubber 3 is fixed to the reduced diameter end portions 2a of the shaft member 2, and the bearing member 4 is fixed to the soft rubber 3. It's stuck.

Next, in FIGS. 1 to 8, 5 is a cylindrical member, and the cylindrical member 5 is formed of an elastic material such as rubber or synthetic resin. In the embodiment shown in FIGS. 2, 3, 5, and 6, a plurality of grooves (recesses) 5b parallel to the axis of the cylindrical member 5 are formed on the inner peripheral surface 5a of the cylindrical member 5. .. Further, in the embodiment shown in FIG. 7, a plurality of holes (cavities) 5e parallel to the axis of the cylindrical member 5 are formed between the outer peripheral surface 5c and the inner peripheral surface 5a of the cylindrical member 5. In each embodiment, four grooves 5b and holes 5e are provided, but an appropriate number of two or more may be provided, and the cross-sectional shape can be appropriately selected. In addition, in the embodiment shown in FIGS. 2, 3, 5, and 6, the cylindrical member 5 is formed by the main body portion 5f and the side plate 5g.

In the embodiment shown in FIG. 5, iron powder 6 is filled inside the metal tube or paper tube 2b and inside the groove 5b of the cylindrical member 5. It should be noted that granular or powdery objects such as iron powder can be packed also in the embodiments of FIGS. 2, 3, 6 and 7, and the inside of the shaft member 2 and the groove 5b or the hole of the cylindrical member 5 can be filled. It may be packed both inside and inside 5e.

In the embodiment shown in FIG. 1, the groove 5b or the hole 5e is not provided in the cylindrical member 5, and the cylindrical member 5 is directly fixed to the shaft member 2. Thus, the embodiment shown in FIGS. Then, the shaft member 2 is inserted and fixed to the cylindrical member 5 with the soft rubber 7 interposed. Further, in the embodiment shown in FIG. 8, the cylindrical member 5 is separated into a plurality (four in the figure).

Next, the operation will be described based on the embodiment shown in FIGS. 1 to 8. First, as shown in FIGS. 1 to 8, in any roller 1, the bearing member 4 is fixed to both ends 2a of the shaft member 2 with the cylindrical soft rubber 3 interposed therebetween. The soft rubber 3 does not absorb the shock received from the outside by the member 5 and the vibration of the roller 1 caused by the shock, and does not transmit the vibration to the bearing member 4. It will not be adversely affected. In this case, the cylindrical soft rubber 3 is reduced in diameter to a different diameter as in the embodiment shown in FIGS. 1 to 6 or in an annular groove shape as in the embodiment shown in FIGS. 7 and 8. When the shaft member 2 is fixed to both ends 2a, the bearing member 4 does not have a large diameter, but is compact and lightweight.

Further, when the shaft member 2 is formed of a metal rod as in the embodiment shown in FIGS. 1, 2, 4 and 7, a strong roller 1 is obtained, which is shown in FIGS. 3, 5, and 8. As in the embodiment shown, it is formed of a metal tube or paper tube 2b and both end members 2c fixed to both ends thereof, or both ends 2a of the metal tube are plastically worked as in the embodiment shown in FIG. If the roller 1 is formed with a reduced diameter, the weight of the roller 1 becomes lighter. When the roller 1 is formed of a paper tube, the paper tube also acts to absorb the shock and vibration transmitted from the cylindrical member 5. Furthermore, as shown in FIG. 5, when a granular or powdery object 6 such as iron powder is packed inside the metal tube or the paper tube 2, this absorbs shocks and vibrations. Will increase further. The roller 1 formed by subjecting both ends 2a of the metal tube to plastic working to reduce the diameter as in the embodiment of FIG. 6 has a large space in the portion of the metal tube that does not reduce the diameter, and the roller 1 is even lighter. As a result, the cylindrical member 5 made of an elastic material such as rubber or synthetic resin becomes thin and the cost is reduced. In addition, it is an extremely easy work to reduce the diameter of the metal pipe by plastically working it as shown in FIG.

Next, the cylindrical member 5 made of an elastic material such as rubber or synthetic resin, which is fixed by penetrating the shaft member 2, is attached to the cylindrical member 5 as in the embodiment shown in FIGS. 2, 3, 5 and 6. A plurality of recessed grooves 5b may be provided on the inner peripheral surface 5a, or a plurality of cavities 5e may be provided between the outer peripheral surface 5c and the inner peripheral surface 5a as in the embodiment shown in FIG. Then, since the groove 5b or the hole 5e absorbs the external impact of the cylindrical member 5 and the vibration of the cylindrical member 5 generated by the impact, almost no impact noise is generated. Further, the vibration of the cylindrical member 5 is prevented from being transmitted to other parts of the device via the shaft member 2 to generate a resonance sound or exert a bad influence. The concave portion may be a groove 5b parallel to the axis of the cylindrical member 5 as in the embodiment shown in FIGS. 2, 3, 5 and 6, or a spiral groove, or the cavity shown in FIG. If a hole 5e parallel to the axis of the cylindrical member 5 or a spiral hole is formed, the mold for the cylindrical member 5 can be easily manufactured, and the cylindrical member 5 can be easily molded. Further, as shown in FIG. 5, if these particles 5b or holes 5e are filled with a granular or powdery object 6 such as iron powder, this will absorb shocks and vibrations better, so that the effect of sound deadening and vibration damping will be obtained. Will increase further.

Further, in the embodiment shown in FIGS. 4 and 8, the cylindrical member 5 made of an elastic material such as rubber or synthetic resin is inserted and fixed to the shaft member 2 with the soft rubber 7 interposed. The soft rubber 7 absorbs the shock received by the cylindrical member 5 and the vibration of the cylindrical member 5 due to the shock, and the shock noise is hardly generated, and the resonance sound is generated or adversely affected in other parts of the device. Never. Furthermore, even with respect to the sheet feeding roller 1 in which the cylindrical member 5 is separated into a plurality of pieces as in the embodiment shown in FIG. It can be shaken and will not produce resonance or be adversely affected by other parts of the equipment.

[0023]

[Effect of the device]

 As described above, the roller of the present invention does not vibrate or generate a shock noise even when the roller receives an impact from the outside due to the action of paper feeding, printing, etc. It does not make a resonance sound or have a bad influence. Further, it is possible to reduce the weight of the roller and reduce the cost. Due to this excellent roller, it can be widely used in office equipment such as printers, facsimiles, typewriters, word processors, telex, and other automation equipment.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a roller of the present invention, in which the cross-section shown in the center of the figure is a cross-section perpendicular to the cross-sections shown on both sides.

FIG. 2 is a cross-sectional view showing an embodiment of the roller of the present invention, in which the cross-section shown in the center of the figure is a cross-section perpendicular to the cross-sections shown on both sides.

FIG. 3 is a cross-sectional view showing an embodiment of the roller of the present invention, in which the cross-section shown in the center of the figure is a cross-section perpendicular to the cross-sections shown on both sides.

FIG. 4 is a cross-sectional view showing an embodiment of the roller of the present invention, in which the cross-section shown in the center of the figure is a cross-section perpendicular to the cross-sections shown on both sides.

FIG. 5 is a cross-sectional view showing an embodiment of the roller of the present invention, in which the cross-section shown in the center of the figure is a cross-section perpendicular to the cross-sections shown on both sides.

FIG. 6 is a cross-sectional view showing an embodiment of the roller of the present invention, in which the cross section shown in the center of the figure is a cross section perpendicular to the cross sections shown on both sides.

FIG. 7 is a cross-sectional view showing an embodiment of the roller of the present invention, in which the cross section shown in the center of the figure is a cross section perpendicular to the cross sections shown on both sides.

FIG. 8 is a cross-sectional view showing an embodiment of the roller of the present invention, in which the cross-section shown in the center of the figure is a cross-section perpendicular to the cross-sections shown on both sides.

FIG. 9 is a sectional view showing an example of a conventional roller.

[Explanation of symbols]

 1 roller 2 shaft member 2a both ends 2b metal tube or paper tube 2c both ends member 3 soft rubber 4 bearing member 5 cylindrical member 5a inner peripheral surface 5b groove (recess) 5c outer peripheral surface 5e hole (cavity) 6 iron powder (granular or powder) Object) 7 Soft rubber

Claims (15)

[Scope of utility model registration request] 1. A roller characterized in that a bearing member is fixed to both ends of a shaft member by interposing a cylindrical soft rubber. 2. The roller according to claim 1, wherein the cylindrical soft rubber is fixed to both ends of the shaft member having a reduced diameter. 3. The roller according to claim 1, wherein the shaft member is formed of a metal rod. 4. The roller according to claim 1, wherein the shaft member is formed of a metal tube or a paper tube and both end members fixed to both ends thereof. 5. The roller according to claim 1, wherein the shaft member is formed by subjecting both ends of a metal tube to plastic working to reduce the diameter to form the both ends. 6. The roller according to claim 4, wherein the shaft member is filled with a granular or powdery substance. 7. The cylindrical member formed of an elastic material such as rubber or synthetic resin, which is fixed by penetrating the shaft member, is provided with a plurality of recesses on the inner peripheral surface thereof. Laura. 8. The roller according to claim 7, wherein the recess is a groove parallel to the axis of the cylindrical member. 9. The roller according to claim 7, wherein the concave portion is a groove formed in a spiral shape. 10. Rubber fixed by penetrating said shaft member,
7. The roller according to claim 1, wherein a plurality of cavities are provided between the outer peripheral surface and the inner peripheral surface of the cylindrical member formed of an elastic material such as synthetic resin. 11. The roller according to claim 10, wherein the cavity is a hole parallel to the axis of the cylindrical member. 12. The roller according to claim 10, wherein the cavity is a spirally formed hole. 13. The roller according to claim 7, wherein the concave portion or the cavity is filled with a granular or powdery substance. 14. The roller according to claim 1, wherein the shaft portion is inserted and fixed with a soft rubber interposed in a cylindrical member formed of an elastic material such as rubber or synthetic resin. 15. The roller according to claim 1, wherein the cylindrical member is divided into a plurality of parts.