JP2012232833A - Roller with surface material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller with surface materials which does not require a time for roller design, and can add functions and characteristics on a roller surface efficiently according to required performance.SOLUTION: The roller with the surface materials includes a roller 12 and the surface materials 11. The roller 12 is configured by keeping a roller body 30 attached to the peripheral side of a backing 20. The roller body 30 includes: a cylindrical part 31; both ring-shaped sidewalls 33 and 33 disposed so as to plug apertures at both ends of the cylindrical part 31; and connection parts 32 and 32 for connecting them, and is a hollow roller having a cavity 29 inside. The surface materials 11 are ring-shaped members detachably attached to a periphery of the roller body 30 to cover a peripheral face of the cylindrical part 31.

Description

  The present invention relates to a roller with a surface material used for conveying applications such as conveying paper sheets.

  Conventionally, a paper feeding mechanism including a driving roller and a driven roller disposed so as to face the driving roller is known. The paper feed mechanism is configured such that the driven roller is rotated along with the driving of the driving roller, and various paper sheets are sandwiched and conveyed between the driving and driven rollers.

  For example, a drive roller used in the paper feeding mechanism is generally formed of an elastomer material that has a high coefficient of friction with respect to a conveyed product in order to impart a gripping force. On the other hand, the driven roller does not require a great grip force, but it may be required to have a relatively low friction coefficient in order to improve various performances. For example, when the conveyed product is a label sheet, the driven roller needs to be formed of a low friction material in order to improve the releasability with respect to the adhesive.

  In recent years, a so-called hollow roller has been developed in which a cavity is provided inside the roller and the elastic force is increased (see, for example, Patent Document 1). The hollow roller is formed of an elastomer material in order to ensure high elasticity.

Japanese Patent No. 3396024

  However, in the hollow roller, if it is attempted to reduce the friction coefficient of the surface, it is necessary to form the roller with a special rubber such as fluoro rubber, and there is a problem that it takes time for material design and shape design. An apparatus to which a roller is applied usually includes a plurality of paper feeding mechanisms, and requires a large number of rollers having different characteristics. However, it is inefficient to prepare various rollers that satisfy each characteristic. There is also a problem.

  Therefore, the present invention has been made in view of the above problems, and it is possible to efficiently add functions and characteristics to the roller surface according to required performance without requiring time for roller design. An object is to provide a roller with a possible surface material.

  A roller with a surface material according to the present invention includes a roller main body and a ring-shaped surface material that is detachably attached to the outer periphery of the roller main body so as to cover the outer peripheral surface of the roller main body.

  It is preferable that the roller body includes a cylindrical portion that forms an outer peripheral surface, and constitutes a hollow roller having a cavity on the inner peripheral side of the cylindrical portion. The roller with surface material is, for example, a paper sheet conveying roller. In addition, the roller body is formed of an elastomer, and the hardness of the surface material is preferably higher than, for example, the hardness of the roller body, unlike the roller body. However, the hardness of the surface material may be lower than the hardness of the roller body.

  Protruding portions that protrude radially inward are provided at both ends in the axial direction of the surface material, and the surface material should be fitted to the roller body so that the roller body is sandwiched from both ends by the protruding portions. . At this time, both ends in the axial direction of the outer peripheral surface of the roller main body are small-diameter portions having a diameter smaller than that of the outer peripheral surface therebetween via the step portion, and the protruding portion is arranged along the step portion. It is preferable. The projecting portion is, for example, an annular shape, and is connected to the end portion of the surface material over the entire circumference.

  More preferably, the roller body preferably has a cylindrical portion that forms an outer peripheral surface and both end surfaces are the stepped portions, ring-shaped side walls that are arranged so as to close both end openings of the cylindrical portion, and the cylindrical portion. A hollow roller is provided that has both end surfaces connected to both side walls and has a cavity on the inner peripheral side of the cylindrical portion. In this case, it is preferable that a protrusion part is arrange | positioned at the outer peripheral side of a connection part.

  The roller surface material according to the present invention has a ring shape and is detachably attached to the roller outer peripheral side so as to cover the outer peripheral surface of the roller.

  According to the present invention, it is possible to efficiently change the surface characteristics of the roller body with a simple configuration without requiring time for designing the roller.

It is a side view which shows the roller with a surface material which concerns on 1st Embodiment. It is sectional drawing which follows the II-II line | wire in FIG. It is sectional drawing which follows the III-III line in FIG. It is a top view of the roller in 1st Embodiment, Comprising: About the roller main body, it is the figure which showed only the inner peripheral edge part by the oblique line. It is sectional drawing which shows the roller with a surface material which concerns on 2nd Embodiment.

First, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a roller 10 with a surface material according to the present embodiment is a paper sheet conveying roller, and a surface material 11 is attached to the outer periphery of the roller 12. The roller 12 is configured by attaching a roller body 30 formed of an elastomer to the outer peripheral side of the support 20.

  As is apparent from FIGS. 1 to 3, the support 20 has a shaft hole 22 penetrating in the axial direction, and the shaft 14 constituting the roller shaft is passed through the shaft hole 22. Both end portions in the axial direction of the support 20 are formed as flange portions 23, 23 having an outer diameter slightly larger than a portion between both end portions and projecting outward. The support 20 is formed of, for example, a hard resin, metal, or the like, and is preferably a resin having a low coefficient of friction such as polyacetal.

  Each flange portion 23 is provided with a plurality of through holes 26 penetrating in the axial direction so as to surround the shaft hole. As shown in FIG. 2, each of the through holes 26 has one opening at the end surfaces 20 </ b> A and 20 </ b> A in the axial direction of the support body 20 (that is, the side surface outside the flange 23) and the other opening at the flange 23. Open on the inner side surfaces 23A, 23A. Each through-hole 26 communicates with the outside of the roller body 30 and a cavity 29 described later.

  As is apparent from FIGS. 2 to 4, an annular groove 24 provided along the circumferential direction is formed on the outer peripheral surface of each flange 23 (that is, the support 20). Each annular groove 24 is a groove having a substantially semicircular cross section whose width decreases as it goes radially inward. Further, as shown in FIGS. 3 and 4, a plurality of branch grooves 25 (four in this embodiment) branch from the annular groove 24 are provided on the outer peripheral surface of each flange 23.

  The branch groove 25 extends axially outward from the annular groove 24 to the end face 20A along the axial direction and opens at the end face 20A. Further, as shown in FIG. 1, the branch groove 25 has a horizontally long cross-sectional substantially rectangular shape. As shown in FIG. 4, the position of each branch groove 25 provided in one flange portion 23 coincides with the position of each branch groove 25 provided in the other flange portion 23 in the circumferential direction.

  As shown in FIGS. 2 and 3, the roller body 30 includes a substantially cylindrical tubular portion 31, ring-shaped side walls 33 and 33 arranged so as to close both end openings of the tubular portion 31, and a tubular shape. Both end surfaces in the axial direction of the portion 31 are integrally formed by connecting portions 32 and 32 that connect the outer peripheral edges of the side walls 33 and 33. The outer peripheral surface of the cylindrical part 31 is a smooth circumferential surface, and serves as a transport surface for transporting paper sheets, as will be described later. However, the outer peripheral surface of the cylindrical part 31 may have a fine uneven surface or a tooth shape.

  The cylindrical portion 31 is thicker than the thin sheet-like connecting portion 32 and the side wall 33, and the outer peripheral surfaces of the connecting portions 32 and 32 are smaller in diameter than the outer peripheral surface of the cylindrical portion 31. And the outer peripheral surface of the connection parts 32 and 32 will be connected to the outer peripheral surface of the cylindrical part 31 via the level | step-difference parts 31A and 31A comprised by the both end surfaces of the cylindrical part 31. FIG. Moreover, since the connection parts 32 and 32 are cross-sectional arcs, it becomes a small diameter gradually toward the side wall 33. As shown in FIG.

  Each side wall 33, 33 is attached to the support and is substantially perpendicular to the axial direction. That is, the side walls 33 are connected to the cylindrical portion 31 so that the connection angle α is 90 °. However, the connection angle α may be larger than 90 ° or smaller.

  As shown in FIG. 2, the inner peripheral edge 35 of each side wall 33 bulges in the axial direction and is thicker than the other portions of the side wall 33. Specifically, the inner peripheral edge 35 bulges inward in the axial direction from the side wall 33 and has a substantially circular cross section. The inner peripheral edge 35 is thick over the entire circumference. As shown in FIGS. 1, 3, and 4, each inner peripheral edge 35 is provided with a plurality of protrusions 36 (four in this embodiment) that protrude outward in the axial direction at equal intervals in the circumferential direction. As apparent from FIG. 1, the convex portion 36 has a substantially semicircular cross section, and its width becomes shorter toward the inside in the radial direction.

  Examples of the elastomer constituting the roller body 30 include millable urethane, natural rubber (NR), styrene butadiene rubber (SBR), ethylene propylene diene rubber (EPDM), nitrile rubber (NBR), silicon rubber (VMQ), and chloroprene rubber. (CR), chlorinated butyl rubber (Cl-IIR), chlorosulfonated polyethylene rubber (CSM), isoprene rubber (IR), butadiene rubber (BR), ethylene propylene rubber (EPM), butyl rubber (IIR), fluoro rubber (FKM) ), Acrylic rubber (ACM), or a mixture thereof.

  As shown in FIGS. 2 and 3, the roller body 30 has a cylindrical portion 31 disposed on the outer peripheral side of the support 20, and inner peripheral portions 35, 35 of both side walls 33, 33 are annular grooves 24, 24. Each is fitted and attached to the support 20. The roller main body 30 attached to the support 20 has a hollow 29 formed between the cylindrical portion 31 and the outer peripheral surface of the support 20 over the entire circumference, thereby forming a hollow roller. As shown in FIGS. 1, 3, and 4, each convex portion 36 is fitted into each branch groove 25, thereby preventing the roller body 30 from rotating in the circumferential direction with respect to the support body 20.

  The roller body 30 is a hollow roller formed of an elastomer which is an elastic material, and has a relatively thin connection portion 32 and side wall 33, and has a high elastic force. Further, the roller body 10 can easily send air inside the cavity 29 to the outside through the through hole 26 due to its elastic force. Therefore, the roller body 30 can be easily deformed in the radial direction in accordance with a pressing state from the outside.

  As shown in FIGS. 1 to 3, the surface material 11 is a cylindrical ring member and is detachably attached to the outer periphery of the roller body 30. The surface material 11 includes projecting portions 40 and 40 projecting radially inward at both end portions in the axial direction. The protrusions 40, 40 have an annular shape, are connected to the end of the surface material 11 over the entire circumference, and are formed integrally with the surface material 11.

  The surface material 11 is attached to the roller main body 30 so as to cover the outer peripheral surface of the cylindrical portion 31 and the projecting portions 40 and 40 along the step portions 31A and 31A. At this time, the surface material 11 is fitted to the roller main body 30 with the cylindrical portion 31 sandwiched between the projecting portions 40 and 40 from both ends thereof. Further, the inner diameter of the surface material 11 is substantially equal to the outer diameter of the cylindrical portion 31, and the inner peripheral surface of the surface material 11 is in contact with the outer peripheral surface of the cylindrical portion 31.

  The separation distance between the projecting portions 40 is substantially equal to the length of the cylindrical portion 31 in the axial direction. Therefore, the protrusions 40 are pressed outward in the axial direction by the reaction force from the cylindrical portion 31 that is an elastic material, and the surface material 11 is prevented from falling off the roller body 30. However, the surface material 11 can be removed from the roller body 30 by pulling the surface material 11 with a certain amount of force.

  The surface material 11 is formed of a material different from the material constituting the roller body 30. In the present embodiment, the surface material 11 is formed of a material that makes the coefficient of friction with respect to the conveyed product lower than the coefficient of friction with respect to the conveyed object of the roller body 30. The surface material 11 is usually formed of a material having a hardness higher than that of the roller body 30 in order to reduce the friction coefficient. In the present specification, the hardness is measured in accordance with JIS K6253.

  Although the material which forms the surface material 11 is not specifically limited, It selects suitably according to the performance requested | required, for example, synthetic resins illustrated by fluororesins, such as a tetrafluoroethylene resin (PTFE), and polyacetal, or heat | fever These are thermoplastic elastomers such as plastic urethane elastomers and thermoplastic silicone elastomers, and elastomers such as the various rubbers described above. Among these, when the surface material 11 is formed of a relatively hard material (for example, synthetic resin), the protrusions 40 and 40 are not substantially bent, so that the surface material 11 is protruded from the cylindrical portion 31. Due to the reaction force applied to 40, the fitting is relatively strong.

  With the configuration as described above, in this embodiment, by attaching and detaching the surface material 11 to and from the roller main body 30, it is possible to easily change the characteristics of the roller surface according to the required performance. Therefore, it is possible to give the roller various surface characteristics without requiring time for development. Further, even if various devices such as a paper feeding device require a plurality of rollers having different surface characteristics, it is not necessary to prepare various types of roller bodies themselves, so that an efficient device design is possible.

  Moreover, in this embodiment, when the surface material 11 is attached to the outer peripheral surface of the roller main body 30, the outer peripheral surface of the surface material 11 which is relatively hard and has a low coefficient of friction with respect to the conveyed product becomes the roller transport surface. Therefore, for example, the roller can be suitable for the driven roller of the paper feed mechanism. On the other hand, when the surface material 11 is removed from the roller body, the outer peripheral surface of the cylindrical portion 31 having a relatively low hardness and a high friction coefficient becomes the roller conveyance surface. Therefore, since the grip force with respect to the conveyed product is increased, for example, the roller can be suitable for the driving roller of the paper feed mechanism.

  Further, since the roller is composed of two different materials by attaching the surface material 11, it is possible to easily give the roller various characteristics. For example, in the present embodiment, coupled with the fact that the roller body 30 is a hollow roller, it is possible to provide a roller with improved gripping force while ensuring the flexibility of the roller.

  Furthermore, in the present embodiment, the roller body 30 is also fitted and attached to the support body 20, so that it can be attached to and detached from the support body 20 relatively easily. Therefore, the surface material 11 can be easily attached to and detached from the roller body 30 with the roller body 30 removed from the support 20. Moreover, since the protrusions 40 and 40 are arranged on the outer peripheral side of the connection parts 32 and 32, they do not protrude outward from both ends of the roller main body 30 in the axial direction, for example, impinge on rotation of the rollers by hitting other members. There is nothing wrong.

  In the present embodiment, the shape of the surface material 11 is not limited to the above-described configuration. For example, the inner diameter of the surface material 11 is larger than the outer diameter of the roller body 30 and is not in contact with the outer peripheral surface of the cylindrical portion 31. Also good. Further, the roller main body 30 may be fitted by a member other than the protrusions 40 and 40.

  The inner peripheral edge 35 and the annular groove 24 are not limited to the above-described structure, and may have any shape as long as the inner peripheral edge 35 is fitted and fixed to the annular groove 24. The shape does not have to match. For example, the annular groove 24 may have a square cross section. The same applies to the convex portion 36 and the branch groove 25. Further, in the roller main body 30, the convex portion 36 may protrude inward in the axial direction from the inner peripheral edge portion 35, or may protrude both inward and outward in the axial direction. Moreover, the convex part 36 may protrude radially inward.

  Further, the rotation prevention of the roller body 30 with respect to the support body 20 may be a recess formed in the inner peripheral edge 35 instead of the protrusion. In this case, the annular groove 24 is provided with a convex portion corresponding to the concave portion. Moreover, the rotation stoppers, such as a convex part and a recessed part, do not need to be provided.

  FIG. 5 is a cross-sectional view showing a roller with a surface material according to the second embodiment of the present invention. In the first embodiment, the roller body constitutes a hollow roller, but this embodiment constitutes a solid roller. Hereinafter, the difference between the second embodiment and the first embodiment will be described.

  The roller 50 according to the present embodiment is configured by attaching a cylindrical roller body 51 to a cylindrical support body 52 disposed therein. The roller body 51 has an inner peripheral surface fixed to the outer peripheral surface of the support body 52, and the support body 52 is provided with a shaft hole 53 through which the shaft 54 passes through in the axial direction. The roller body 51 may be made of the same elastomer as in the first embodiment, or may be made of a synthetic resin material such as polyacetal or fluororesin.

  On the other hand, the surface material 11 is the same as that of the first embodiment, covers the outer peripheral surface of the roller main body 51, and is arranged so that the protrusions 40, 40 are along both end surfaces in the axial direction of the roller main body 51. The roller body 51 is fitted to the outer periphery of the roller body 51 and is detachably attached to the roller body 51.

  Also in this embodiment, by attaching / detaching the surface material 11 to / from the roller main body 51 as in the first embodiment, the characteristics of the roller surface can be easily changed according to the required performance.

  In each of the above embodiments, the friction coefficient of the outer peripheral surface of the surface material 11 with respect to the conveyed product is higher than that of the outer peripheral surface of the roller main bodies 30 and 51, and therefore the hardness of the surface material 11 is lower than that of the roller main bodies 30 and 51. Also good. In this case, by attaching the surface material 11 to the roller main bodies 30 and 51, for example, the grip force of the roller can be increased. This is effective when the roller bodies 30 and 51 are made of a material having a low coefficient of friction with respect to the conveyed product, for example, for a driven roller.

  Furthermore, the surface material 11 may not have a smooth surface, for example, a tooth shape or a ground surface. Thereby, for example, when the outer peripheral surfaces of the roller main bodies 30 and 51 are smooth surfaces, even if the surface material 11 is the same material as the roller main body, the surface material 11 is attached so that the conveyed material of the surface material 11 The coefficient of friction against can be increased.

  In addition, the roller in each of the above embodiments may be various paper sheet conveying rollers used in addition to the paper feeding mechanism constituted by the driving and driven rollers, and conveys a conveyance object other than the paper sheet. May be used to

  In each embodiment, when the roller is a driven roller, the supports 20 and 52 may be slidably rotatable with respect to the shafts 14 and 54, or may be rotatable with respect to the shafts 14 and 54. And may be rotated integrally with the shafts 14 and 54. On the other hand, in the case of a driving roller, the support bodies 20 and 52 are usually fixed to the shafts 14 and 54. Further, the support bodies 20 and 52 may not be separate members from the shafts 14 and 54 but may be integrated with the shafts 14 and 54 as one member. Furthermore, in each said embodiment, the roller main bodies 30 and 51 are not comprised with an elastomer or resin single-piece | unit, A knitted fabric, a core wire, etc. may be embed | buried.

DESCRIPTION OF SYMBOLS 10 Roller with surface material 11 Surface material 12, 50 Roller 20, 52 Support body 30, 51 Roller body 31 Cylindrical part 31A Step part 32 Connection part 33 Side wall 40 Protrusion part

Claims (11)

  A roller with a surface material, comprising: a roller main body; and a ring-shaped surface material detachably attached to the outer periphery of the roller main body so as to cover an outer peripheral surface of the roller main body.   The roller with a surface material according to claim 1, wherein the roller body includes a cylindrical portion that forms the outer peripheral surface, and forms a hollow roller having a cavity on an inner peripheral side of the cylindrical portion. At both ends in the axial direction of the surface material, provided are protruding portions that protrude radially inward,
3. The roller with a surface material according to claim 1, wherein the surface material is fitted into the roller body so that the roller body is sandwiched from both ends by the protrusions. 4. . The outer peripheral surface of the roller body is a small-diameter portion whose both ends in the axial direction are smaller in diameter than the outer peripheral surface therebetween via a stepped portion,
The roller with a surface material according to claim 3, wherein the protruding portion is arranged along the stepped portion. The roller main body forms the outer peripheral surface, and both end surfaces are cylindrical portions, the ring-shaped side walls disposed so as to close both end openings of the cylindrical portion, and the cylindrical portion. Connecting both end surfaces of the cylindrical portion with a connecting portion that connects to both side walls, and forming a hollow roller having a cavity on the inner peripheral side of the cylindrical portion,
The roller with a surface material according to claim 4, wherein the protruding portion is disposed on an outer peripheral side of the connecting portion.   The roller with a surface material according to claim 3, wherein the projecting portion is annular and is continuously provided at an end of the surface material over the entire circumference.   The roller with a surface material according to any one of claims 1 to 6, wherein the hardness of the surface material is different from that of the roller body.   The roller with a surface material according to claim 7, wherein the roller body is made of an elastomer, and the hardness of the surface material is higher than the hardness of the roller body.   The roller with a surface material according to claim 7, wherein the roller body is made of an elastomer, and the hardness of the surface material is lower than the hardness of the roller body.   The roller with a surface material according to any one of claims 1 to 9, wherein the roller is a paper sheet conveying roller. A roller surface material characterized by having a ring shape and detachably attached to the roller outer peripheral side so as to cover the outer peripheral surface of the roller.

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