JP2022156574A - roller - Google Patents

Abstract

To provide a novel roller capable of preventing movement or falling-off of a feeding part to or from a roller body even when a force is applied to the outer peripheral surface of the feeding part inward in a radial direction at the peripheral-direction outside end of the outer peripheral surface of the feeding part.SOLUTION: A peripheral-direction end surface 20 of a roller body 4 is extended to incline inside a notch 8 seen in the peripheral direction from an outer peripheral edge toward the inside in a radial direction, and a peripheral-direction end surface 36 of a feeding part 6 is extended to incline inside seen in the peripheral direction from the outer peripheral edge toward the inside in the radial direction.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to rollers, particularly rollers used for separating and conveying paper sheets.

2. Description of the Related Art Conventionally, a roller including a roller main body and a delivery section has been widely put into practical use as a roller used when separating and conveying paper sheets. As such a roller, for example, in Patent Document 1 below, a notch extending in the circumferential direction is formed in a part of the outer peripheral surface of the roller main body, and the delivery part is formed in the roller main body. A roller is shown mounted in the notch. The roller is arranged in combination with other rollers arranged in parallel or an appropriate fixed member in a state in which the outer peripheral surface is in close contact with the outer peripheral surface of the roller, and a required force (so-called nip force) is added. When the outer peripheral surface of the feeding portion of the rotating roller contacts or comes into close contact with the paper sheet, a frictional force acts between the feeding portion and the paper sheet due to the above force, and the roller moves the paper sheet. Separate and transport the kind. Therefore, the rollers are required to have a relatively high profile accuracy, and in order to improve the profile accuracy, the outer peripheral surface of the entire roller is cut or polished with a grindstone or the like after the roller main body and the delivery part are combined. . When the outer peripheral surface of the roller is cut or polished by a grindstone or the like, a required radially inward force is applied to the outer peripheral surface of the roller. Further, in the roller shown in Patent Document 1 below, the circumferential end surface of the roller main body portion that defines the circumferential end of the notch faces the circumferential end surface of the delivery portion, and the roller facing the roller An engaging concave portion and an engaging convex portion that engage with each other are formed on the circumferential end face of the body portion and the circumferential end face of the delivery portion, respectively, and the engaging concave portion and the engaging convex portion are engaged with each other. Thus, the delivery section is prevented from moving with respect to the roller main body or falling off from the roller main body.

JP 2018-43821 A

In the roller shown in Patent Document 1, both the circumferential direction side end surfaces of the roller body portion and the circumferential direction side end surfaces of the delivery portion that define the circumferential ends of the notches are both parallel, so for example, the roller When conveying paper sheets by rotating, or when the outer peripheral surface of the entire roller is cut or polished, when the radially inward force is applied at the circumferential end portion of the outer peripheral surface of the delivery portion, This force may elastically displace the circumferential end surface of the feeding portion to the circumferentially spaced side, that is, to the inner side in the circumferential direction, from the circumferential end surface of the roller main body facing it. This is because when the force is applied to the circumferential end of the outer peripheral surface of the feeding portion, the circumferential end of the feeding portion falls inward in the circumferential direction with the inner end of the circumferential end face as a fulcrum. because it is easy. When the circumferential end surface of the feeding portion is displaced in the circumferential direction away from the opposing circumferential end surface of the roller main body portion, the engagement between the engaging concave portion and the engaging convex portion is released, and the feeding portion is disengaged. may move with respect to the roller main body or drop off from the roller main body.

The present invention has been made in view of the above facts, and its main technical problem is to solve the problem when a radially inward force is applied to the outer peripheral surface of the delivery portion at the circumferentially outer end portion of the outer peripheral surface of the delivery portion. To provide a novel roller capable of sufficiently preventing a sending part from moving with respect to a roller main body or falling off from the roller main body.

As a result of intensive studies, the present inventors have found that the circumferential end face of the roller main body portion is located inside the notch when viewed in the circumferential direction from the outer peripheral edge toward the radial direction inner side, and the circumferential end face of the delivery portion is positioned radially from the outer peripheral edge. It has been found that the above main technical problem can be solved by extending each inward at an angle when viewed in the circumferential direction toward the inner side.

That is, according to the present invention, a roller capable of solving the above main technical problems includes a roller main body portion and a delivery portion, and a notch extending in the circumferential direction is provided on a part of the outer peripheral surface of the roller main body portion. is formed, the delivery portion is mounted in the notch formed in the roller body portion, and the circumferential end face of the roller body portion defining the circumferential end of the notch is the circumferential direction of the delivery portion A roller in which an engaging concave portion and an engaging convex portion that engage with each other are formed on the circumferential end face of the roller main body portion and the circumferential end face of the delivery portion facing the end face, respectively,
The circumferential end face of the roller main body part is inside the notch when viewed in the circumferential direction from the outer peripheral edge toward the radially inner side, and the circumferential end face of the delivery part is the radially inner side from the outer peripheral edge. Rollers are provided, characterized in that they each extend obliquely inwardly when viewed in a direction.

Preferably, the engaging recess is open on the outer peripheral surface of the roller main body, and the outer peripheral surface of the roller main body is continuous with the outer peripheral surface of the delivery section. It is preferable that an upright piece is formed on the outer peripheral surface of the portion of the roller main body where the notch is formed so as to stand up from the outer peripheral surface and engage with the delivery portion in the axial direction. In this case, it is preferable that the inner peripheral surface of the delivery portion is formed with a recess that engages with the upright piece. An engagement hole is formed in the outer peripheral surface of the portion of the roller main body where the notch is formed, and the inner peripheral surface of the delivery portion has the engagement hole and the shaft extending downward from the inner peripheral surface. It is preferable that an engaging protrusion is formed that engages in a direction perpendicular to the direction. Preferably, the engaging concave portion is formed on the circumferential end surface of the roller body portion, and the engaging convex portion is formed on the circumferential end surface of the delivery portion.

In the roller of the present invention, the circumferential end face of the roller body portion and the circumferential end face of the feeding portion facing each other are viewed in the circumferential direction from the outer peripheral edge toward the radially inner side of the circumferential end face of the roller body portion. In the inner side of the notch, the circumferential end surface of the delivery portion extends from the outer peripheral edge toward the radial direction inward and inclined inward when viewed in the circumferential direction. When a radially inward force is applied to the outer circumferential surface of the outer circumferential end portion, the circumferential end surface of the feeding portion is elastically displaced so as to be pressed against the circumferential end surface of the roller main body portion facing thereto. Therefore, when the above-mentioned force is applied, the engagement between the engaging protrusions and the engaging recesses is released, and the feeding section is prevented from moving with respect to the roller main body or falling off from the roller main body. be done.

1 is a front view of a preferred embodiment of a roller constructed in accordance with the present invention; FIG. FIG. 2 is an exploded perspective view of the roller shown in FIG. 1 as seen from above; FIG. 2 is an exploded perspective view of the roller shown in FIG. 1 as seen from below; The perspective view which expands and shows the periphery of the peripheral direction outer end part of the delivery part in the outer peripheral surface of the roller shown in FIG. FIG. 2 is a view for explaining the behavior of the feeding section when force is applied radially inward to the outer peripheral surface of the circumferentially outer end of the feeding section in the roller shown in FIG. 1 ; 2 is an exploded perspective view of another embodiment of the roller shown in FIG. 1 as viewed from above; FIG.

A more detailed description will now be given with reference to the accompanying drawings which illustrate preferred embodiments of rollers constructed in accordance with the present invention.

Referring to FIG. 1, the roller, indicated generally by the number 2, includes a roller body portion 4 and a delivery portion 6 and is substantially circular in profile when viewed in the axial direction.

The roller main body 4 is formed by molding a relatively hard synthetic resin by an appropriate molding method. If desired, roller body 4 may be made of metal. 2 and 3 together with FIG. 1, the roller main body 4 has an overall cylindrical shape, and a shaft hole 7 is formed in the center thereof so as to penetrate in the axial direction. The roller main body 4 is fixed to a shaft (not shown) inserted through the shaft hole 7 so as to be rotatable about the rotation axis o. A notch 8 extending in the circumferential direction is formed in a part of the outer peripheral surface of the roller main body 4, and the roller main body 4 has a portion 4a in which the notch 8 is formed and a portion 4a in which the notch 8 is not formed. 4b. In the illustrated embodiment, the notch 8 (and therefore the portion 4a) is formed over the entire axial length of the roller main body 4 . The cross-sectional shape of the outer peripheral surface of the portion 4a is arc-shaped except for the portion where the engagement groove indicated by number 10 is formed. In the illustrated embodiment, the engaging groove 10 corresponds to an engaging hole that engages with an engaging protrusion 28 (described later) formed on the delivery portion 6 in a direction perpendicular to the axial direction. The cross section of the engagement groove 10 is arc-shaped and is open to the outer peripheral surface of the portion 4a. Such engaging grooves 10 are formed one by one at both circumferential direction end portions of the outer peripheral surface of the portion 4a, and both of them extend linearly in the axial direction and penetrate therethrough. On the outer peripheral surface of the portion 4a, there are erected end walls 12 extending in the circumferential direction at both ends in the axial direction and erected intermediate walls 14 extending in the circumferential direction at the intermediate portion in the axial direction. formed. The standing end wall 12 and the standing intermediate wall 14 are collectively referred to as standing pieces. The standing end wall 12 and the standing intermediate wall 14 do not exist in the portion where the engaging groove 10 is formed. The standing end wall 12 has a longer extension length from the outer peripheral surface of the roller main body 4 and a smaller axial width than the standing intermediate wall 14 . Two circular arc-shaped outer peripheral grooves 16 extending continuously in the circumferential direction are formed on the outer peripheral surface of the portion 4b at intervals in the axial direction. Part 18 is present. Accordingly, three remaining portions 18 are present on the outer peripheral surface of the portion 4b at intervals in the axial direction, and each remaining portion 18 is provided with a circumferential end surface 20 that defines the circumferential end of the notch 8. there is In the illustrated embodiment, the circumferential end face 20 is formed with locally displaced engagement recesses 22 , and the engagement recesses 22 are also open on the outer peripheral surface of the roller main body 4 . The circumferential end face 20 and the engagement recess 22 will be further referred to later.

The feeding portion 6 is made of a synthetic resin material having a relatively high coefficient of friction such as rubber, and is mounted in a notch 8 formed in the roller body portion 4 by a mounting method which will be described later. If desired, delivery portion 6 may be made of an elastomeric synthetic resin material having a relatively high coefficient of friction. The cross-sectional shape of the feeding portion 6 is generally arc-shaped, and its outer diameter is the same as the outer diameter of the portion 4b of the roller main body portion 4, and its inner diameter is the same as the outer diameter of the portion 4a of the roller main body portion 4, respectively. The axial width of the feeding portion 6 is the same as the axial width of the roller body portion 4 . On the inner peripheral surface of the feeding portion 6, end recesses 24 axially engage with the upright end walls 12 formed in the roller body portion 4 at both axial end portions thereof, and an upright intermediate wall at an axial intermediate portion thereof. Intermediate recesses 26 axially engaging with 14 are formed in a continuous circumferential direction. The end recesses 24 and the intermediate recesses 26 are collectively referred to as recesses. Further, on the inner peripheral surface of the delivery portion 6, at both circumferential direction end portions, there are suspended from the inner peripheral surface and engaged with the engaging grooves 10 formed in the roller main body portion 4 in the direction perpendicular to the axial direction. An engaging protrusion 28 is also formed. Such an engaging protrusion 28 extends linearly in the axial direction. An outer circumferential groove 30 and a residual portion 32 extending continuously in the circumferential direction at the same axial width and position as the outer circumferential groove 16 and the residual portion 18 of the roller main body portion 4 are provided on the outer peripheral surface of the delivery portion 6. there is A large number of grooves 34 extending linearly in the axial direction are formed on the outer peripheral surface of the remaining portion 32 at equal intervals in the circumferential direction. A circumferential end surface 36 of the residual portion 32 is formed with an engaging projection 38 that engages with the engaging recess 22 formed in the circumferential end surface 20 of the roller body portion 4 .

The feeding section 6 described above combines the previously formed roller main body 4 as an inner mold (core) with a cylindrical outer mold having an inner peripheral surface that defines the outer peripheral surface of the feeding section 6. By pouring a rubber material into the space (that is, the notch 8) defined between the roller main body 4 and the outer mold, the roller main body 4 is integrally molded. At this time, an adhesive was applied in advance to the outer peripheral surface of the portion of the roller main body 4 where the notch 8 was formed, and the rubber material poured into the space was cured to form the delivery portion 6. At a later stage, it is preferable that the delivery section 6 is adhered to the roller body section 4 with the adhesive. Further, the feeding portion 6 does not necessarily have to be molded integrally with the roller body portion 4. After molding the feeding portion 6 and the roller body portion 4 with separate molds, the feeding portion 6 and the roller body portion 4 are formed. May be combined. When the feeding portion 6 and the roller main body portion 4 are molded in separate molds, the engaging groove 10 of the roller main body portion 4 and the engaging protrusion 28 of the feeding portion 6 are elastically engaged with each other. Since the feeding section 6 is attached to the roller main body 4, the roller main body 4 can be reused by exchanging only the feeding section 6 as necessary. In this case, since the shape of the feeding portion 6 with respect to the roller main body portion 4 can be appropriately changed and molded, the engaging protrusions 28 of the feeding portion 6 are formed in advance with respect to the engaging grooves 10 of the roller main body portion 4. If it is set large, it is possible to increase the fitting force between the engaging protrusion 28 and the engaging groove 10 compared to the case where the delivery portion 6 is integrally formed with the roller body portion 4 as described above. As a result, the feeding section 6 can be attached to the roller main body 4 without using an adhesive. If desired, the delivery portion 6 and the roller body portion 4 may be adhered with an adhesive even if the delivery portion 6 and the roller body portion 4 are molded in separate molds.

When the delivery portion 6 is attached to the notch 8 formed in the roller main body 4, the inner peripheral surface of the delivery portion 6 is the outer peripheral surface of the portion 4a of the roller main body 4 and the periphery of the delivery portion 6. The directional end faces 36 face and are in surface contact with the circumferential end faces 20 of the roller body 4, respectively, and the roller 2 is substantially circular when viewed in the axial direction. At this time, in the roller 2 of the present invention, the circumferential end surface 20 of the roller main body 4 extends radially inward from the outer peripheral edge to the inner side of the notch 8 when viewed in the circumferential direction. It is important that the end surface 36 extends from the outer peripheral edge toward the inner side in the radial direction while being inclined inward when viewed in the circumferential direction (in FIG. A straight line r1 indicating the radial direction passing through the boundary of is indicated by a chain double-dashed line). Further, in the illustrated embodiment, as will be understood by referring to FIGS. 1 and 4 together with FIG. The outer peripheral surface of 4 is continuous with the outer peripheral surface of delivery part 6 .

The outer peripheral surface of the roller 2 formed as described above is usually cut or polished with a whetstone or the like in order to improve the accuracy of the outer shape. Continuing the description with reference to FIG. 5, when the outer peripheral surface of the roller 2 is cut or polished by a grindstone or the like, a force F is applied to the outer peripheral surface of the roller 2 in the direction toward the rotation axis o, that is, inward in the radial direction. Granted. Further, when the roller 2 is actually used by being attached to an external device, the outer peripheral surface of the roller 2 is aligned with the outer peripheral surface of another roller arranged parallel to the rotation axis o or the outer surface of an appropriate fixing member. directly or indirectly through the paper sheet to be conveyed, and a force F is applied to the outer peripheral surface of the roller 2 in the direction toward the rotation axis o, that is, radially inward (in FIG. 5, the force A straight line r2 extending from the arrow of F is indicated by a two-dot chain line). At this time, in the roller 2 constructed in accordance with the present invention, the circumferential end face 20 of the roller main body 4 and the circumferential end face 36 of the feeding portion 6 facing each other are not on the circumferential end face 20 of the roller main body 4. Inside the notch 8 when viewed in the circumferential direction radially inward from the outer peripheral edge, and on the inner side when viewed in the circumferential direction radially inward from the outer peripheral edge in the circumferential end surface 36 of the delivery portion 6 . Due to the oblique extension, when a radially inward force F is applied to the outer peripheral surface of the circumferentially outer end portion of the sending portion 6, the circumferential end surface 36 of the sending portion 6 is Since it is elastically displaced so as to be pressed against the circumferential end surface 20 of the roller main body 4 facing the , the engagement between the engaging convex portion 38 and the engaging concave portion 22 is released when the force F is applied. As a result, the feeding section 6 is prevented from moving with respect to the roller main body 4 or falling off from the roller main body 4 with sufficient certainty.

In the illustrated embodiment, the engaging recess 22 is open on the outer peripheral surface of the roller main body 4, and the outer peripheral surface of the roller main body 4 is continuous with the outer peripheral surface of the delivery section 6, so that the roller 2 is When the delivery unit 6 rotates and comes into contact with the outer peripheral surface of a grindstone or other roller (not shown) or the upper surface of an appropriate table on which paper sheets are conveyed, from the circumferential outer edge of the outer peripheral surface of the engaging protrusion 38. is that the delivery portion 6 rolls up from the roller main body 4 when the outer peripheral surface of the delivery portion 6 comes into contact with a grindstone or the like due to the relatively narrow axial width of the outer peripheral surface of the engaging convex portion 38. is prevented, and the sending portion 6 smoothly comes into contact with the grindstone or the like.

FIG. 6 shows an exploded perspective view from above of another embodiment of the roller shown in FIG. In the roller of this embodiment, three engaging grooves 10' and three engaging projections 28' are formed for axially engaging the roller main body portion 4' and the delivery portion 6'. , is different from the roller 2 shown in FIG. By increasing the number of engaging grooves 10' and engaging protrusions 28' that are engaged with each other in the direction perpendicular to the axial direction, it becomes more difficult for the delivery portion 6' to come off from the roller main body portion 4'. further prevented.

As described above, the roller configured according to the present invention has been described in detail with reference to the attached drawings. is possible. For example, in the illustrated embodiment, the engaging recesses are formed on the circumferential end surface of the roller main body portion, and the engaging protrusions are formed on the circumferential end surface of the delivery portion. Engagement protrusions may be formed on the end surfaces of the roller main body in the circumferential direction.

2: Roller 4: Roller main body 6: Sending part 8: Notch 20: Circumferential end face (of roller main body part) 22: Engaging concave part 36: Circumferential end face (of sending part) 38: Engaging convex part

Claims (6)

A notch extending in the circumferential direction is formed in a part of the outer peripheral surface of the roller body, and the delivery part is mounted in the notch formed in the roller body. The circumferential end surface of the roller main body portion defining the circumferential end of the notch faces the circumferential end surface of the delivery portion, and the opposing circumferential end surface of the roller main body portion and the delivery portion In the roller in which an engaging concave portion and an engaging convex portion that engage with each other are formed on the circumferential end face,
The circumferential end face of the roller main body part is inside the notch when viewed in the circumferential direction from the outer peripheral edge toward the radially inner side, and the circumferential end face of the delivery part is the radially inner side from the outer peripheral edge. Rollers, characterized in that they each extend obliquely inwards when viewed in a direction. 2. The roller according to claim 1, wherein the engagement recess is open on the outer peripheral surface of the roller main body, and the outer peripheral surface of the roller main body is continuous with the outer peripheral surface of the delivery section. 3. The apparatus according to claim 1, wherein an upright piece is formed on the outer peripheral surface of the portion of the roller main body where the notch is formed, and is erected from the outer peripheral surface and engaged with the delivery portion in the axial direction. Roller as described. 4. The roller according to claim 3, wherein the inner peripheral surface of the delivery portion is formed with a recess that engages with the upright piece. An engagement hole is formed in the outer peripheral surface of the portion of the roller main body where the notch is formed, and the inner peripheral surface of the delivery portion has the engagement hole and the shaft extending downward from the inner peripheral surface. 5. A roller according to any one of claims 1 to 4, wherein engaging projections are formed which engage in a direction perpendicular to the direction. 6. The roller according to any one of claims 1 to 5, wherein the engaging concave portion is formed on the circumferential end surface of the roller main body portion, and the engaging convex portion is formed on the circumferential end surface of the delivery portion.

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