JP2010202408A - Conveying roller and rotary shaft for conveying roller and conveying device for substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separate type conveying roller capable of preventing its dropping from a shaft without using a connection member. <P>SOLUTION: The disk-like conveying roller including outer circumferential surfaces 407A, 407B capable of contacting with an object to be conveyed, a center hole for fitting with the outer circumferential surface of the shaft 330 consists of separate rollers 412A, 412B which are separated into substantial halves by a separate surface crossing the center hole sidewise. The respective separate roller includes a partial curved surface, which is part of a collar for specifying the center hole, for contacting a part of the outer circumferential surface of the shaft 330, a protruding part 428A for protruding to a side of another separate roller along the partial curved surface in the dividing surface and a recessed part 426A corresponding with the protruding part 426B of the other separate roller and arranged at a position opposite to the protruding part 426B across the center hole. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transport roller that transports an electronic material substrate and the like, and more particularly, to a transport roller including two divided rollers that are divided into approximately half.

  Conventionally, a transport roller used when transporting a plate-shaped product or paper in an electronic material substrate manufacturing apparatus such as a liquid crystal substrate or a solar cell substrate, or a so-called printer, is a disc-shaped or cylindrical roller. It was the shape which provided the axial hole in the center. Therefore, when assembling the transport device, the shaft end of the rotating shaft is inserted into the shaft hole of the roller and the roller is attached, and then the rotating shaft is attached to the device. In addition, during the maintenance of the roller, since it was necessary to remove the roller from the shaft end after removing the rotary shaft from the apparatus, the work efficiency was poor.

  In view of this, there has been disclosed a conveying roller that can be divided so that the roller can be removed while the rotating shaft is attached to the conveying device, thereby improving work efficiency. For example, in Patent Document 1, a roller is divided into two parallel to the central axis, a convex portion is provided on the roller, a concave portion is provided on the central shaft, and a conveyance roller that assembles the roller and the central shaft by combining the concave and convex portions. It is disclosed.

  Further, in Patent Document 2, a member that forms a roller or the like is divided into a plurality of pieces, and a locking portion is provided on a divided end surface of the divided member that faces the divided end surface of each divided member to connect the divided members to form a ring shape. A split roller formed on a roller or the like is disclosed.

JP-A-6-227700 JP-A-9-165121

  However, in the conveyance roller of Patent Document 1, the roller is simply divided into two in parallel to the central axis (divided into two semicircles in a cross-sectional view), so that only the divided rollers are on the central axis. It is difficult to hold in a state of being united with each other. Therefore, by providing the claw-shaped portions 1a, 2a and 3a made of an elastic member, the divided rollers are coupled to each other by the convex and concave portions provided on the coupling surface of the divided rollers. Yes. However, this method not only increases the number of parts, but also complicates the manner of engagement. Also, tensile stress and shear stress are easily applied to the coupling member, and it is difficult to say that the coupling stability is sufficient.

  In the present invention, in view of the above-described problems, the divided rollers are provided with a split surface having a preferable shape. Therefore, a transport roller that is attached to a shaft and can maintain a combined state without providing a so-called coupling member is provided.

  More specifically, the following can be provided.

(1) In a disc-shaped transport roller having an outer peripheral surface that can contact an object to be transported and a central hole that can be fitted to the outer peripheral surface of the shaft, the transport roller is substantially half by a split surface that crosses the central hole. And the first divided roller is a part of an edge that defines the center hole and is in contact with at least a part of the outer peripheral surface of the shaft. And the first convex portion projecting toward the second divided roller along the first partial curved surface in the side view of the split surface, and the first convex portion as the first convex portion. And a first outward partial curved surface that faces the outer peripheral side and forms a split surface with the second divided roller. The second divided roller includes the first curved surface. The first partial curve is located at a position facing the partial curved surface with the central hole in between. The second partial curved surface corresponding to the first convex portion coincides with the first convex portion, and a radial outward force transmitted from the first convex portion in contact with the first outward partial curved surface from the outer peripheral side is counteracted. And a second inward partial curved surface. A conveying roller can be provided.

  Here, the object to be transported is not particularly limited and may include any material, but may include a thin plate such as a substrate. In addition, “to be able to contact” is not limited as long as the object can be physically contacted as long as the object can be physically contacted. For example, a gas, liquid, or solid state may be interposed between the object to be transported. The outer peripheral surface may generally define the outer surface of the transport roller. A shape that is substantially circular in a side view of the conveyance roller may be included. The shaft may function as a rotation axis of the transport roller. The center hole that can be fitted to the outer peripheral surface of the shaft may have a sectional shape of the shaft that is substantially the same as the opening shape of the center hole. In general, the fitting may mean press-fitting or the like, but here, it may mean mounting by assembly or that the shaft hardly idles in the center hole. The shaft may include a so-called round bar and may include a modified round bar. For example, the cross-sectional shape of the shaft may include a circle or an ellipse. Moreover, the curve which comprises a circle | round | yen and a linear part may be included. The conveying roller has a disk shape having a predetermined thickness, and the thickness may correspond to the width of the outer peripheral surface. When this thickness is particularly thick, it can also be said to be cylindrical.

  Further, the split surface is a surface that passes through both side surfaces of the disk-shaped roller, and can mean a surface that separates the divided rollers. Therefore, when the divided rollers are combined to form a transport roller, the split surface may include a coupling surface. The split surface may include a plane and / or a curved surface. Crossing the central hole may mean that this split surface passes through the central hole. Although the case where the conveyance roller is divided into three or more parts may be included, two parts (or substantially two parts) are preferable. The divided roller may include at least a part of an edge that defines the central hole. The inner peripheral surface of the edge may be at least partially in contact with the outer peripheral surface of the shaft when combined with the transport roller, and the contact may prevent idling of the shaft. In particular, each division in which the edge defining the center hole is divided so that the inner circumferential surface of the edge defining the center hole of each division roller can come into contact with the outer circumferential surface of the shaft by the proximity of the shaft in the radial direction. Preferably it is distributed to the rollers. Thereby, the division | segmentation roller can be united smoothly around a shaft. In addition, it is more preferable that it is substantially divided into two equal parts. Each divided roller may have substantially the same side surface area and / or shape. It may be a substantially point-symmetrical body centered on the rotation center of the roller. A case where the plane is symmetrical with respect to the split plane may be included. A part of the edge that defines the center hole may be provided with a partial curved surface that is disposed on each of the divided rollers and can abut against at least a part of the outer peripheral surface of the shaft. This partial curved surface may constitute a concave portion that receives the convex curved surface (bulging curved surface, first fitting surface) of the shaft. Here, each divided roller is referred to as a first divided roller and a second divided roller, but 1 and 2 are names for convenience, and it goes without saying that these are interchangeable.

  In addition, the convex portion protruding along the partial curved surface has a part of the edge defining the central hole provided with the partial curved surface that causes the split surface to bulge toward the other divided roller in a side view of the conveying roller. As such, it may mean a semicircular (or semi-elliptical) shaped portion that extends. For example, the convex portion may have a nose-like shape with a part of the edge defining the central hole down in a side view. Further, the split surface may have a so-called S shape in a side view.

  For example, when the first divided roller includes the first convex portion, the second convex portion coincides with the second convex portion of the second divided roller with the center hole interposed therebetween (for example, the second convex portion is a jigsaw). A first concave portion including a first inward partial curved surface is provided, which matches the receiving shape of the first concave portion and is fitted as it is like a puzzle piece. At least a part of the split surface that defines the first recess is in contact with at least a part (second outwardly curved surface) of the split surface that defines the second convex part when the split rollers are combined. Form. On the other hand, the first partial curved surface provided in a part of the edge defining the central hole of the first divided roller is at least one of the convex curved surface that is a part of the outer peripheral surface of the shaft fitted into the central hole. The force that contacts the part and receives the shaft and removes the first divided roller from the shaft in the radial direction is the force that pushes up the first partial curved surface in the convex direction of the shaft on the contact surface. Conversion is possible. Therefore, the force for mounting and dismounting the first split roller from the shaft in the radial direction abuts on at least a part of the convex curved surface and reacts with the first split roller along the convex curved surface. And converted into lifting force. The force that lifts up the first split roller is a force that lifts up the first convex portion, and the second split roller on the coupling surface (or fitting surface) with the second split roller when combined. May work as a lifting force.

  On the other hand, the second split roller includes a second partial curved surface corresponding to the first partial curved surface at a position facing the first partial curved surface with the central hole in between, and similarly, the central hole The shaft can be brought into contact with at least a part of a convex curved surface that is a part of the outer peripheral surface of the shaft to receive the shaft, and can be opposed to a force for lifting the second divided roller. Therefore, the second split roller has a lifting force due to a force to dismount the first split roller from the shaft in the radial direction and a drag force against the force across the shaft. Since it receives with the big member called the 2nd division | segmentation roller, destruction of a member does not occur easily. The shaft also receives compressive stress by this, but since it receives from the first and second partial curved surfaces at the opposing positions, stress concentration hardly occurs and the shaft member hardly breaks.

  In the above description, the case where the first split roller is loaded / removed in the radial direction from the shaft has been considered. Exactly the same applies to the case where the second divided roller is loaded / unloaded in the radial direction from the shaft. Specifically, in the above description, the same can be explained by replacing the first with the second and the second with the first.

  As described above, when the split rollers are combined and attached to the shaft, it is very difficult to separate the split rollers even if the split rollers are pulled with a radial force to pull them apart. Therefore, by providing the dividing surface of the split roller as described above without providing a connecting member, it is possible to assemble a transport roller that is firmly coupled, and use it for transport.

(2) The second split roller includes a second convex portion projecting toward the first split roller along the second partial curved surface in the side view of the split surface, and the second convex portion. And the second partial curved surface, the second partial curved surface facing the outer periphery and forming a split surface with the first split roller, the first split The roller coincides with the second convex portion, and comes into contact with the second outward partial curved surface from the outer peripheral side to oppose a radially outward force transmitted by the second convex portion. The conveyance roller according to (1) can be provided.

(3) The first and second divided rollers are divided on the outer peripheral surface by an inclined dividing line that is inclined at a predetermined angle with respect to the rotation direction of the conveying roller. Or the conveyance roller as described in (2) can be provided.

  Here, the inclined dividing line is an inclined line (divided) formed by joining the inclined dividing surfaces formed by inclining the dividing surfaces of the first and second dividing rollers in the vicinity of the outer periphery of the conveying roller. Roller seam). Such an inclined split surface may be connected to the split surface that defines the first convex portion. The inclined dividing line may be inclined at a predetermined angle with respect to the rotation direction of the conveying roller, and is inclined at a predetermined angle greater than 0 degree and less than 90 degrees. If this angle is too small, the inclined split surface becomes too large, which is not preferable because it reduces the productivity and ease of making the split roller. Therefore, for example, 30 degrees or more is preferable, 40 degrees or more is more preferable, and 44 degrees or more is more preferable. On the other hand, if this angle is too large, the effect of the inclination angle described below is reduced, which is not preferable. For example, 60 degrees or less is preferable, 50 degrees or less is more preferable, and 46 degrees or less is more preferable. The inclined split surfaces of the first and second split rollers can be brought into contact with each other only when moved in the axial direction of the shaft and can be separated when separated.

  As described above, the joint between the divided rollers may be inclined at a predetermined angle with respect to the width direction of the outer peripheral surface (or the axial direction of the shaft). In general, when a single conveying roller is configured by engaging these divided rollers, the coupling surfaces of the divided rollers are not completely in contact with each other, and a slight gap (for example, a gap or a step) is likely to occur. A seam that is substantially parallel to the axial direction of the shaft or inclined at a predetermined angle is formed on the outer peripheral portion of the transport roller. As described above, the gap of the joint is substantially parallel to the axial direction of the shaft (that is, substantially perpendicular to the rotation direction of the transport roller). There is a risk of giving an impact to the object to be transported at one time. However, when the joint is inclined at a predetermined angle with respect to the rotation direction, the joint does not contact the object to be transported at one time, but on one side of the transport roller according to the rotation of the transport roller. It is possible to contact the conveyed object while continuously changing the position in the width direction from one side to the other side. As a result, a temporary impact on the conveyed object can be prevented. The predetermined angle with respect to the rotation direction can be determined by the inclination angle of the first inclined surface with respect to the side surface of the transport roller.

(4) It further comprises a restricting member capable of fixing at least the first and second divided rollers in the axial direction of the shaft, and the restricting member is the central hole of the first and second divided rollers. It is possible to provide the transport roller according to any one of (1) to (3), wherein the transport roller is fixed by contacting both side surfaces of the edge that defines

  The first and second partial curved surfaces may be provided along the outer peripheral surface of the shaft, but they may not prevent idling of the shaft in the central hole. By providing a partial flat surface on the outer peripheral surface of the shaft, such idling can be effectively prevented. In addition to such a plane, a keyway may be provided. In order to obtain a more stable state, the partial plane is preferably provided so as to sandwich the shaft.

(5) In the above (1) to (4), the first and second divided rollers are combined and mounted on the shaft, and the axial movement of the shaft is limited and fixed. Any one of the conveyance rollers can be provided.

  As described above, it is difficult to separate the first and second divided rollers combined with the shaft by pulling them in the radial direction, but these divided rollers are relatively free to move in the axial direction of the shaft. It can be carried out. Therefore, by restricting the movement in the axial direction, the transport roller can be fixed to the shaft. Further, the split surface that divides the transport roller may be perpendicular to the side surface of the transport roller. Alternatively, it may be parallel to the axial direction of the shaft. Moreover, when there are two or more inclined dividing lines on the outer peripheral surface, it is preferable that both of them are inclined in the same direction. In this way, since the direction of the inclined dividing surface that forms the inclined dividing line on the outer peripheral surface is unified with respect to the axial direction of the shaft, each divided roller is placed on the shaft, and the axial direction of the shaft It can be assembled as a transport roller by moving in that direction (the direction of uniting). And by moving to the reverse direction (direction to separate), a conveyance roller can be divided | segmented into each division | segmentation roller.

(6) The shaft, one or more of the transport rollers according to any one of (1) to (5) mounted on the shaft, and the axial direction of the shaft of each of the mounted transport rollers It is possible to provide a conveying device including a regulating member that regulates movement.

  Here, the restricting member is a member that can restrict the movement of the split roller in the axial direction, and may include, for example, a wedge, a yoke, and other small pieces.

(7) A disk-shaped transport roller comprising a shaft, an outer peripheral surface that can contact the object to be transported, and a central hole that can be fitted to the outer peripheral surface of the shaft by combining the substantially half by a split surface that crosses the central hole And a split roller assembly comprising: a first split roller and a second split roller, wherein the shaft is formed on an inner surface of an edge defining at least a part of the central hole of the first split roller. A step of contacting at least a part of the outer peripheral surface of the first divided roller to the shaft, and an inner surface of an edge defining at least a part of the central hole of the second divided roller. Attaching the second split roller to the shaft at a position shifted in the axial direction of the shaft by bringing at least a part of the outer peripheral surface of the shaft into contact with the shaft; and the first and / or the first 2 The step of sliding the split roller in the axial direction of the shaft to unite the first and second divided rollers, and the movement of the first and / or the second divided roller in the axial direction of the shaft are limited. A method of assembling the split roller assembly can be provided.

(8) A shaft used for the transport roller according to any one of (1) to (4) above, an axial center hole having a common shaft center with the shaft, and a prism member defining the axial center hole; A rib portion extending in a diagonal direction of the cross section of the prism member, an outer shell member defining an outer peripheral surface of the shaft, and a space portion defined by the prism member, the rib portion, and the outer shell member. A shaft characterized by the above can be provided.

(9) A rotating shaft that supports the transport roller of the glass substrate transport apparatus, an outer shell member that defines an outer peripheral surface that contacts and supports the transport roller, and a shaft center hole that has the same shaft center as the outer shell member A prismatic member defining the axial center hole and extending in the axial direction in the outer shell member, a rib portion extending in a diagonal direction of a cross section of the prismatic member, the prismatic member, the rib portion, and the outer shell It is possible to provide a rotating shaft including a space defined by the member, wherein at least a part of the outer shell member includes a flat surface.

  According to the present invention, since the roller can be divided, the roller can be detached from the shaft while the shaft is attached to the conveying device, and the dividable roller can be combined and mounted on the shaft without a connecting member. it can.

It is a disassembled perspective view which shows the whole structure of the Example of this invention. FIG. 2 is a perspective view illustrating an assembled state in the embodiment of FIG. 1. It is a figure which shows the roller of the state assembled in the Example of FIG. 1, (a) is a side view, (b) is the front view, (c) is a front view when rotated by the predetermined angle. It is a disassembled perspective view which shows the whole structure of another Example of this invention. It is a side view of the division | segmentation roller assembly concerning another Example of this invention. It is a side view explaining the structure by the angle of a division | segmentation roller. It is a side view explaining the function of a division | segmentation roller. It is a side view which explains another function with another type of division roller. It is a side view explaining the function of another type of division roller. It is a side view explaining the structure by the angle of the division | segmentation roller of another Example. It is a side view explaining the function of another type of division roller. It is an assembly perspective view which shows the whole structure of another Example of this invention. It is a side view of the conveyance roller of the Example of FIG. It is a side view which shows the state which isolate | separated about the division | segmentation roller of the Example of FIG. It is a perspective view which shows one division | segmentation roller of the Example of FIG. It is a perspective view which shows a mode that one division | segmentation roller is attached to a shaft about the Example of FIG. FIG. 9 is a perspective view of the embodiment of FIG. 7 in which the other split roller is also attached to the shaft and the movement in the axial direction is indicated by an arrow. FIG. 13 is a perspective view illustrating a state in which a conveyance roller is attached to a shaft as a result of the movement of FIG. 12. It is a top view which shows a mode that the joint of the division | segmentation roller united about the Example of FIG. 7 appears on an outer peripheral surface. It is an expanded side view of the shaft with which the stopper was attached. It is a front view of a stopper. It is a top view which shows the state by which the conveyance roller attached to the shaft is being fixed by the stopper. FIG. 8 is a side view showing a state in which different types of stoppers are attached to the shaft in the embodiment of FIG. 7. It is sectional drawing of the assembly conveyance roller with which the stopper of the Example of FIG. 18 was attached. It is a side view of the stopper of the Example of FIG. It is a perspective view which shows the conveying apparatus incorporating the conveying roller of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is made for explaining the embodiments of the present invention, and the present invention is limited to these embodiments. It is not a thing. The same or the same type of elements are denoted by the same or related symbols, and redundant description is omitted.

  1 to 3 show one embodiment of the present invention, FIG. 1 is an exploded perspective view showing an overall configuration, FIG. 2 is an assembled perspective view, and FIG. 3 is (a) an assembled side view, (B) It is a front view, (c) It is a front view when rotating until a joint becomes visible in the front. The transport roller assembly 410 includes disk portions 414A and 414B that are main members of the divided rollers 412A and 412B, and cylindrical hole edge rib portions 416A and 416B that define a center hole located at the center thereof. Here, the center hole 409 has an oval shape in which a cross section is cut off from both sides from a circular shape and flat surfaces are provided on both sides, and a shaft 330 having a cross-sectional shape, hereinafter referred to as a double D shape, is fitted. When the shaft 330 is fitted into the center hole, the divided rollers 412A and 412B are attached to the shaft 330. The hole edge rib portions 416A and 416B reinforce the center hole and ensure that the divided rollers 412A and 412B are securely fixed to the shaft 330. It is provided so as to protrude from both sides. In addition, this makes it possible to reduce the flare of the transport roller in which the divided rollers 412A and 412B are combined with the shaft center.

  Further, the division rollers 412A and 412B include outer peripheral surfaces 407A and 407B that are in contact with an object to be conveyed (for example, an electronic material substrate such as a liquid crystal substrate and a solar cell substrate) on the outer periphery of the outer peripheral rib portions 418A and 418B. The outer peripheral surfaces 407A and 407B have a width in the axial direction of the shaft 330, and are formed by cylindrical side surfaces having a low height (in FIG. 2, the width direction of the roller in which the divided rollers 412A and 412B are combined). The surface properties (shape, material, etc.) are appropriately selected in consideration of the contact with the object to be conveyed (not shown). Further, like the hole edge rib portions 416A and 416B, the hole edge rib portions 416A and 416B are provided so as to protrude in the width direction of the roller. Thereby, a contact area with a to-be-conveyed object increases, and conveyance can be performed stably.

  Each of the divided rollers 412A and 412B includes a coupling surface that forms a split surface. For example, the divided roller 412A includes S-shaped coupling surfaces 420A and 421A and inclined surfaces 422A and 424A at the outer peripheral portion when viewed from the side. On the other hand, the division roller 412B includes S-shaped coupling surfaces 420B and 421B and outer peripheral inclined surfaces 422B and 424B so as to coincide with the coupling surface of the division roller 412A. The split roller 412A includes a convex portion 428A that protrudes toward the other split roller 412B with respect to the split surface 421 along the inner peripheral surface of the hole edge rib portion 416A that defines the center hole, and is provided with the coupling surface 421A. The other split roller 412B is provided with a recess 428B which is also defined by the coupling surface 421B so as to coincide with this. In addition, the dividing roller 412A includes a concave portion 426A defined by the coupling surface 420A at a position opposite to the convex portion 428A with the center hole interposed therebetween. The concave portion 426A coincides with a convex portion 426B (defined by the coupling surface 420B) that protrudes toward the split roller 412A with respect to the split surface 420. Such divided rollers 412A and 412B are first mounted on the outer peripheral surface of the shaft 330, move in the axial direction as they are, and become combined rollers as shown in FIG. At this time, the positions of the outer peripheral rib portions 418A and 418B are determined by the contact of the coupling surfaces 422A and 422B and 424A and 424B. At this time, joints 422 and 424 of the respective coupling surfaces are formed on the outer peripheral surface. In this embodiment, the joints 422 and 424 are inclined with respect to the rotation direction of the transport roller assembled at about 45 degrees, and have an inclination effect as described later.

  Here, the shaft 330 is made of, for example, aluminum or an aluminum alloy, and has a cross-sectional oval shape including a flat surface 342 provided by laying a round bar on the floor and cutting off both sides. A quadrangular prism-shaped member that includes an axial center hole 332 having a common axial center with the cylindrical shell member 340 that defines the outer periphery of the shaft 330, and that forms the axial center hole 332 inside the shell member 340, The structure is supported by rib portions 336 extending in the diagonal direction of the prismatic section. A space 334 partitioned by the four rib portions 336 and a T-shaped portion of a slot (or T slot) 335 described later are provided between the shell member 340 and the quadrangular column. In order to obtain such a structure, the shaft (rotating shaft) 330 is lightweight, but has a large second moment of section and a high resistance to bending. Such a structure can be formed relatively easily by extrusion molding of aluminum or an aluminum alloy, but when an iron-based alloy such as stainless steel is used, it is formed by machining. In many cases, productivity is low.

  As shown in FIG. 1, the surface of the outer shell member 340 of the double D-shaped shaft 330 is in contact with the inner peripheral surfaces of the hole edge rib portions 416A and 416B of the split rollers 412A and 412B. Specifically, in FIG. 1, flat inner peripheral surfaces 417A and 417B are in contact with the flat surface 342 with the split surfaces 422 and 424 sandwiched therebetween, and inner peripheral surfaces 415A and 415B that are curved are in contact with the curved surfaces 341 and 341. . Due to the contact between the flat surfaces, the rotational position of the coupled transport roller and the rotational position of the shaft 330 are synchronized, and the idle rotation of the shaft 330 in the central hole 409 of the transport roller can be prevented.

  On the flat surface 342, a slot (or T slot) 335 extends along the axial direction. As will be described later, the slot 335 is provided with a stopper for restricting the axial movement of the shaft 330 to which the assembled transport roller is fixed. Although details will be described later, these divided rollers 412A and 412B are attached to the shaft 330, and if the shaft 330 is fixed so as not to move in the axial direction, the divided rollers 412A and 412B are separated, and the shaft 330 is separated. Will not be dismounted.

  When the split rollers 412A and 412B are mounted on the shaft 330 in this state, the conveyance rollers are joined by the axial movement of the shafts. The outer peripheral rib portions 418A and 418B of the split rollers 412A and 412B are combined with the inclined coupling surfaces 422A and 422B. 424A and 424B can be performed with high accuracy. These inclined coupling surfaces are inclined at substantially the same angle so that the coupling surfaces 422A and 422B and 424A and 424B to be coupled are aligned with each other. On the other hand, the inclined coupling surfaces located at positions facing each other with the disc portions 414A and 414B interposed therebetween in the combined transport rollers are inclined in the same direction. For example, in FIG. 1, the coupling surfaces 422 </ b> A and 422 </ b> B are inclined downward to the right, similar to the coupling surfaces 424 </ b> A and 424 </ b> B at the opposing positions. Here, this state is referred to as being inclined in the same direction when viewed from the front. By inclining in the same direction as described above, for example, in FIG. 1, the dividing roller 412A moves on the shaft 330 from the back side to the front side (or from the right to the left), so that Can be merged. By the way, although not shown in the figure, when the plane does not incline in parallel (this state is referred to as “inclined by crossing in plan view” here), the uniting of the divided rollers is caused by the axial movement on the shaft. It is not easy to do. More specifically, as shown in FIG. 3 (c), the split surface 424 appears as a line on the outer peripheral surface, and is inclined downward to the right so that the inclination angle θ with respect to the rotation direction is about 45 degrees. ing. Here, the coupling surfaces 424A and 424B are shaped so as to coincide with each other and do not necessarily need to be rotationally symmetric. Further, the split surface 422 at a position facing the split surface 424 appearing on the outer peripheral surfaces 407A and 407B is inclined in the same direction. In this embodiment, since the inclination angle θ is the same, it overlaps the split surface 424 in FIG. However, the inclination angles need not be the same in the two split surfaces appearing on the outer peripheral surface, but are preferably substantially the same.

  FIG. 4 is an exploded perspective view showing the overall configuration of another embodiment of the present invention. The transport roller assembly 10 includes disk portions 14A and 14B that are main members of the divided rollers 12A and 12B, and a center hole defined by cylindrical hole edge rib portions 16A and 16B at the center thereof. When the shaft 30 is fitted into the center hole, the divided rollers 12A and 12B are attached to the shaft 30. Since these members have the same structure, shape, and function as in the previous embodiment of FIG. 1, the same description is omitted.

  Further, the division rollers 12A and 12B include outer peripheral surfaces 17A and 17B that are in contact with the conveyed object on the outer periphery of the outer peripheral rib portions 18A and 18B. Each of the divided rollers 12A and 12B includes a coupling surface that forms a split surface. For example, the divided roller 12A includes S-shaped coupling surfaces 20A and 21A and outer peripheral inclined surfaces 22A and 24A. On the other hand, the division roller 12B includes S-shaped coupling surfaces 20B and 21B and outer peripheral inclined surfaces 22B and 24B so as to coincide with the coupling surface of the division roller 12A. The split roller 12A includes a convex portion 28A that protrudes toward the other split roller 12B with respect to the split surface along the inner peripheral surface of the hole edge rib portion 16A that defines the center hole. The split roller 12B is provided with a recess 28B which is also defined by the coupling surface 21B so as to coincide with this. Further, at a position facing it across the central hole, the dividing roller 12A has a concave portion 26A that coincides with the convex portion 26B defined by the coupling surface 20B that protrudes toward the dividing roller 12A with respect to the split surface. Prepared to be prescribed in First, the split rollers 12A and 12B are attached to the shaft 30 by being joined to the outer peripheral surface of the moving sleeve member 60 having a clearance so as to be movable in the axial direction, and are moved in the axial direction as they are and fixed to the shaft 30. The inner peripheral surface of the movable sleeve member 60 is fitted to the tapered surface 54 of the fixed sleeve member 50. The end wall 56 of the fixed sleeve member 50 fixes the split roller in the axial direction.

  Here, the shaft 30 is made of, for example, aluminum or an aluminum alloy, and includes a shaft center hole 32 having a common shaft center with the cylindrical shell member 40 defining the outer periphery, and the shaft center hole is formed inside the shell member 40. A quadrangular prism-shaped member defining 32 is supported by a rib portion 36 extending in the diagonal direction of the cross section. A cavity 34 is provided between the shell member 40 and the quadrangular prism-shaped member. A groove 38 is provided on the side of the hollow pillar 34 having the quadrangular prism shape. In order to obtain such a structure, the shaft (rotating shaft) 30 is lightweight, but has a large second moment of section and a high resistance to bending. In addition, although there is no flat surface in the fitting portion, there is a risk of idling, but idling is unlikely to occur at low loads, such as lightly transported. Of course, it is needless to say that idling can be prevented by providing a key groove on the shaft 30 or providing a flat surface and matching the shape of the fitting portion of the split roller.

  FIG. 5A is a side view showing still another embodiment. The conveyance roller 112 is defined by a disk portion which is a main member of the division rollers 112A and 112B and cylindrical hole edge rib portions 116A and 116B at the centers thereof. A central hole. When the shaft 130 is fitted into the center hole, the divided rollers 112A and 112B are attached to the shaft 130. The hole edge rib portions 116A and 116B are provided so as to protrude from both side surfaces of the divided rollers 112A and 112B so as to reinforce the center hole and to securely fix the divided rollers 112A and 112B to the shaft 130.

  Each of the dividing rollers 112A and 112B includes a coupling surface that forms a split surface, and is divided by, for example, an S-shaped joint line 128. Unlike the previous embodiment, there is no inclined portion in the vicinity of the outer peripheral portion, and the joint where the split surface appears on the outer peripheral surface is approximately 90 degrees with respect to the rotation direction of the conveying roller that is a combined body of the divided rollers 112A and 112B. is there. However, the split rollers 112A and 112B are provided with the convex portion 128A and the corresponding concave portion 128B, and the concave portion 126A and the corresponding convex portion 126B, respectively, by the split surface viewed from the side in an S shape. Thus, the functions discussed below can be achieved. In the conveyance roller 112 of this embodiment, the above-described inclined surface is not provided. The division rollers 112A and 112B have the same shape. For this reason, production efficiency can be made high.

  FIG. 5B is a side view illustrating the configuration of the dividing roller using the central angle. FIG. 5B is a functional configuration diagram in which a rib defining the center hole and the outer periphery is omitted, unlike FIG. 5A. In a roller in which divided rollers divided by a split surface are combined, the split surface is represented as an S-shaped joint line in a side view. In the figure, the joint line is curved so as to draw an upwardly convex semicircle on the side surface of the roller from the point 1b that intersects the peripheral edge of the center hole, and intersects the outer periphery (intersection point: 1a). From the point 1b that intersects the peripheral part of the center hole, reaches the peripheral part on the opposite side of the central hole along the imaginary line passing through the center of the circle that forms the side surface of the roller, and starts from the intersection 1b 'with the peripheral part Then, the joint line (that is, the split surface) starts again, curves so as to draw a convex semicircle downward, and ends at a point 1a ′ that intersects the outer periphery. In the present embodiment, the split surfaces are formed so that each of the divided rollers has exactly the same shape. In this embodiment, the radius of the roller is r1, and the radius of the center hole is r2. In such a combination of r1 and r2, the central angle defined by the line connecting the intersection (1a) with the outer periphery of the joint line and the intersection (1b) of the peripheral edge of the center hole with the center is 73.87 degrees. Met. This angle will also be described later.

  FIG. 6A is a side view of a combination of the division rollers 212A and 212B. A center hole is defined by the hole edge rib portions 219A and 219B, and is divided by a split surface that exhibits an S-shaped joint line 228 in a side view. The split surface in the right half is started from the starting point P from the center hole, and the tangent line L2 of the circle defining the center hole at this position can be recognized with respect to the joint line 228 in the side view. The joint line 228 advances while curving downward in the figure, and it can be seen that the tangent lines of this curve all stand in the radial direction rather than L2. However, the inclination of the tangent gradually approaches L2, and finally the inclination of the tangent L3 at the point Q becomes substantially equal to the inclination of L2. After that, the tangent slope gradually goes to sleep. As described above, the joint line 228 includes a more inclined portion 227 from the starting point P to the point Q and a more inclined portion 229 that lies after the point Q. Further, the joint line 228 starts at the starting point P at an angle of 90 degrees or less (may be a higher angle as shown in FIG. 6E) with respect to the tangent line L2, gradually decreases the angle, and at the point Q, the tangent line L2 Is 0 degree (parallel). Further, the angle changes in the same direction (rotates in one direction), and finally the angle with the tangent L2 extends to nearly 90 degrees and reaches the outer periphery. On the other hand, there is an inner peripheral surface (partial curved surface) of the split roller 212B at a position R that faces the starting point P across the central hole, and by contacting the outer peripheral surface of the shaft fitted in the central hole, Movement is restricted. As described above, the first divided roller 212A has a first partial curved surface that is a part of an edge defining the center hole, and a second partial roller 212B that protrudes toward the second divided roller 212B along the first partial curved surface. 1 convex part 126B, and the 1st outward partial curved surface (joint line 228) which defines this with a 1st partial curved surface and faces the outer peripheral side. On the other hand, the second divided roller 212B includes a second partial curved surface (inner peripheral surface at position R) corresponding to a position facing the first partial curved surface with the center hole interposed therebetween, and a first convex portion 126B. And a second inward partial curved surface that abuts against and opposes a radially outward force transmitted through one outward partial curved surface. Thus, the radial force for separating the conveying roller can be regulated and countered by the main part which can be said to be the first and second divided rollers as a whole. Moreover, since it controls using the pressing force of each surface which contact | abuts (or opposes), the compressive strength of each member, such as a shaft and a division | segmentation roller, and the shear strength of a comparatively big member can be utilized. Therefore, higher strength and durability can be expected as compared with the fastening of a split roller that depends on the tensile strength of a small part such as a fastening member such as a bolt.

  Here, a force for separating the separating rollers 212A and 212B is applied as shown by arrows T1 and T2 in the figure. Since this force is parallel to the straight line L1, there is nothing that prevents the movement of the dividing roller 212B at the starting point P. Also in R, the tangential direction is lying more than L2, and does not hinder the movement of the dividing roller 212B. However, at the joint line 229 beyond the point Q, the inclination in the tangential direction is lying more than L2, and thus the movement of the dividing roller 212B is restricted. That is, with the movement, the inclined portion 229 of the joint line 228 is pushed (pressed down in the drawing), and the division roller 212A is pushed down in the drawing. However, the inner peripheral surface (partial curved surface) of the split roller 212A at the R position comes into contact with and catches on the outer peripheral surface of the shaft, and this movement is restricted. Therefore, the movement of the division roller 212B in the T1 direction is hindered.

  Here, if the pulling direction (L1 direction) is further laid, interference between the shaft and the inner peripheral surface occurs at the starting point P, and if the L1 direction is made to stand more, this time, the inclination of the joint line 228 beyond the point Q Interference occurs due to the contact between the coupling surfaces at the portion 229. In this way, the split rollers 212A and 212B are combined so that they cannot be separated without using a connecting member. Here, the same applies even when a double D-shaped shaft as shown in FIGS. 1 to 3 is used. The split surface starts from the flat surface of the center hole 409 to be fitted, and the direction of the flat surface corresponds to the direction of the tangent in FIG. 6A. If the pulling force acts in the sleeping direction more than that, it is difficult to divide the dividing roller by that force due to the interference between the shaft 330 and the inner peripheral surface of the center hole 409, and the pulling force is more than that. If acting in the standing direction, the division is prevented by interference between the outer coupling surfaces.

FIG. 6B is a diagram for further explaining the configuration of FIG. 6A. As in FIG. 5B, the radius of the roller is r1, and the radius of the center hole is r2. In this figure, the point where the tangent line L2 is extended and intersects the outer periphery is S, and the joint line 228 is the direction extending to the outer periphery, and the point where the center line straight line L1 extends and intersects the outer periphery is T. The above mechanism will be described in more detail with L4 being a line orthogonal to the lines L1, L2, and L3 and passing through the center. When the point Q is exceeded, the movement of the split roller 212B parallel to the line L2 is regulated by the joint line 228, but the regulation force is not so large because of the friction between the split surfaces at the point Q. On the other hand, when the line L2 crosses the point S where the outer periphery of the roller crosses and the joint line 228 crosses the outer periphery, the outer shell of the split roller 212A exists on the outer peripheral side, so that force is applied in the T1 and T2 directions. Even if it works, the dividing roller 212B comes into contact with the outer shell and receives the force. Although it is somewhat divided by the sliding force on the split surface, it is considered that the component force is small at the radius ratio of r1 and r2. The central angle φ between the point S and the line connecting the center and L4 can be calculated as φ = cos ⁻¹ (r2 / r1). In the example of FIG. 5B, r2 / r1 = 0.29, so φ = 73 degrees. That is, in the embodiment of FIG. 5B, such an angle is adopted. At this time, since force is applied along L2, such a mechanism occurs even if the shaft is not fitted in the center hole.

  Furthermore, a joint line 228 'formed by a split surface that forms a split roller to be another embodiment is indicated by a broken line. The joint line 228 ′ spirally extends from the intersection P with the periphery of the center hole of the joint line 228 ′, reaches the outer periphery, and intersects at the point V. The tangent line of the joint line 228 ′ at the intersection point P (that is, the split surface serving as a sliding surface is along this line) is L5, and the line parallel to this line and in contact with the joint line 228 ′ at the point U is L6. . Here, the shaft is not inserted into the center hole, and even if a force that sandwiches the shaft along the line L4 or L5 is applied at the point P, the shaft is not countered. However, as in the case of the joint line 228, it is divided by the split surface that exhibits the S-shaped joint line 228 'in a side view, and slippage along the line L5 may occur. However, the inclination of the tangent L6 at the point U is substantially equal to the inclination of L5. After that, the tangent slope gradually goes to sleep. In this way, the joint line 228 ′ presses the split surface by the force that separates the slope portion from the slope of the starting point P to the point U having the tangent L6 rotated approximately 180 degrees and the split surface after the point U. It consists of an inversion part of the slope that changes to force. In particular, when the joint line 228 ′ crosses the outer periphery beyond the point V, since the outer shell of the dividing roller 212A exists on the outer peripheral side as in the case where the joint line 228 crosses the line L2 at the joint line 228 and the outer periphery, Even if a force acts in the L5 direction, the dividing roller 212B comes into contact with the outer shell with a split surface and receives the force.

  FIG. 6C is a side view illustrating the configuration of the split roller using the central angle, as in FIG. 5B. In a roller in which divided rollers divided by a split surface are combined, the split surface is represented as an S-shaped joint line in a side view. In the figure, the joint line is curved so as to draw a semicircle convex to the left on the side surface of the roller from the point 2b that intersects the peripheral edge of the center hole, and intersects the outer periphery (intersection: 2a). From the point 2b that intersects the peripheral edge of the center hole, along the imaginary line passing through the center of the circle that forms the side surface of the roller, it reaches the peripheral edge on the opposite side of the central hole, and starts from the intersection 2b ′ with the peripheral edge As a result, the joint line (that is, the split surface) starts again, curves so as to draw a convex semicircle to the right, and ends at the point 2a ′ that intersects the outer periphery. In the present embodiment, the split surfaces are formed so that each of the divided rollers has exactly the same shape. The central angle defined by the line connecting the intersection (2a) with the outer periphery of the joint line and the intersection (2b) of the peripheral edge of the center hole with the center was 61.03 degrees. This angle is smaller than the angle described above because the relationship between the size of the center hole and the slip at the straight portion in the ellipse are greatly restricted.

  FIG. 6D is a side view of a combination of the division rollers 712A and 712B. Unlike FIG. 6A, as shown in FIG. 1, the center hole is similar to an oval instead of a circle. A center hole is defined by the hole edge rib portions 719A and 719B, and is divided by a split surface that exhibits an S-shaped joint line 728 in a side view. The split surface is started from the starting point PP from the center hole, and the tangent line L22 of the circle that defines the center hole at this position can be recognized with respect to the joint line 728 in the side view. The joint line 728 proceeds while curving downward in the figure, and it can be seen that all the tangents of this curve are standing in the radial direction rather than L2. However, the inclination of the tangent gradually approaches L22, and finally the inclination of the tangent L33 at the point QQ becomes almost equal to the inclination of L22. After that, the tangent slope gradually goes to sleep. As described above, the joint line 728 includes a more inclined portion 727 from the starting point PP to the point QQ and a more inclined portion 729 after the point QQ. On the other hand, there is an inner peripheral surface (partial curved surface) of the split roller 712B at a position RR facing the starting point PP with the center hole interposed therebetween, and the movement thereof is restricted by the shaft fitted in the center hole.

  Here, a force for separating the divided rollers 712A and 712B is applied as shown by arrows T11 and T22 in the figure. Since this force is parallel to the straight line L11, there is nothing that prevents the movement of the dividing roller 712B at the starting point PP. Also in RR, the tangential direction lies more than L22 and does not hinder the movement of the dividing roller 712B. However, at the joint line 729 exceeding the point QQ, the inclination in the tangential direction lies more than L22, and thus the movement of the dividing roller 712B is restricted. That is, with the movement, the inclined portion 729 of the joint line 728 is pushed (pressed down in the drawing), and the division roller 712A is pushed down in the drawing. However, the inner peripheral surface (partial curved surface) of the split roller 712A at the RR position is caught by the shaft, and this movement is restricted. Accordingly, the movement of the dividing roller 712B is hindered.

  Here, if the pulling direction (L11 direction) is further laid, interference occurs between the shaft and the inner peripheral surface at the starting point PP, and if the L11 direction is made to stand up more, the inclination of the joint line 728 exceeding the point QQ is now increased. Interference occurs due to the contact between the coupling surfaces at the portion 729. In this way, the split rollers 712A and 712B are combined so that they cannot be separated without using a connecting member. Here, when the joint line 728 intersects with the outer periphery beyond the point where L22 intersects with the outer periphery, the movement can be regulated by the outer shell of the dividing roller 712A coming into contact with the dividing roller 712B as described above.

  FIG. 6E is a schematic side view illustrating the mechanism in a slightly different embodiment. As with FIG. 5B, the configuration of the split roller will be described using the central angle. In a roller in which divided rollers divided by a split surface are combined, the split surface is represented as an S-shaped joint line in a side view. In the figure, the joint line is curved so as to draw a semicircle convex to the left on the side surface of the roller from the point 3b intersecting the peripheral edge of the center hole, and intersects the outer periphery (intersection point: 3a). From the point 3b that intersects the peripheral part of the center hole, along the imaginary line passing through the center of the circle that forms the side surface of the roller, the peripheral part on the opposite side of the central hole is reached, and the intersection 3b ′ with the peripheral part is the starting point Then, the joint line (that is, the split surface) starts again, curves so as to draw a convex semicircle to the right, and ends at the point 3a ′ that intersects the outer periphery. In the present embodiment, the split surfaces are formed so that each of the divided rollers has exactly the same shape. If the tangents at the intersections (3b, 3b ′) of the peripheral edge of the center hole of the joint line are 3La, 3La ′, the tangents at the joint line are perpendicular to the peripheral intersections 3b, 3b ′ as in FIG. Since the split surface is defined with a larger angle, the angle is a considerably standing angle. This angle gradually goes to sleep, has a top on the left side (the tangent at this time and one side of a predetermined center angle X is defined by the center line from the center point), goes further to sleep, and at point 3c A tangent line 3Lc parallel to the tangent line 3La can be drawn (similarly, a tangent line 3Lc ′ can be drawn). Further, it reaches the outer periphery (point: 3a). There is a possibility that the center angle X defined by the line connecting the point and the center and the center line can be made smaller than that of FIG. 6B. The line connecting the point 3b and the center is on the right side of the contact point of the tangent line 3Lc, and defines a positive central angle Y. Even in this case, a strong frictional force acts on the part of the split surface beyond the contact point, and can counter the force separating the split rollers.

  Until now, the split surfaces were substantially perpendicular to the side surfaces of the rollers except for the inclined surfaces 22A, 22B, 24A, 24B, 422A, 422B, 424A, and 424B of the outer peripheral portion. By doing in this way, the assembly of a division | segmentation roller is made to be performed easily by moving the assembly of a division | segmentation roller along a shaft. However, not only the inclined surfaces 22A, 24A, 422A, and 424A of the outer peripheral portion, but also part or all of the split surfaces can be inclined in the same manner as such inclined surfaces. At this time, assembly is possible only from one direction.

  FIGS. 7 to 14 show still another embodiment of the present invention, FIG. 7 is a perspective view showing the overall configuration, FIG. 8 is a side view when combined, and FIG. 9 is when the dividing roller is separated. FIG. 10 is a perspective view showing one of the divided rollers. FIGS. 11 to 13 illustrate a method of assembling the divided roller to the shaft. FIG. 14 shows a conveying roller assembly including the divided rollers. It is a front view. The transport roller assembly 310 includes a cylindrical center hole at the center, and hole edge rib portions 316A and 316B are formed at the periphery of the center hole. When the shaft 330 is fitted into the center hole, the divided rollers 312A and 312B are attached to the shaft 330. The hole edge rib portion 316A is provided so as to protrude from both side surfaces of the divided rollers 312A and 312B so as to reinforce the center hole and to ensure that the divided rollers 312A and 312B are fixed to the shaft 30. In addition, this makes it possible to reduce the deflection of the assembled transport roller with respect to the shaft center.

  The assembled transport roller includes an outer peripheral surface 307A that comes into contact with an object to be transported (for example, an electronic material substrate such as a liquid crystal substrate or a solar cell substrate). The outer peripheral surface 307A is formed by a cylindrical side surface that has a width in the axial direction of the shaft 330, that is, a low height (in FIG. 7, the width direction of the assembled transport roller). The surface properties (shape, material, etc.) are appropriately selected in consideration of the contact with the object to be conveyed (not shown). Further, similarly to the hole edge rib portions 316A and 316B, they are provided so as to protrude from both side surfaces of the assembled conveying roller. Thereby, a contact area with a to-be-conveyed object increases, and conveyance can be performed stably.

  The shaft 330 has an oval cross-sectional shape including a flat surface 342 that can be provided by cutting off both sides when the round bar is laid on the floor. The flat surfaces 317A and 317B on the inner surface are fitted, and the shaft 330 and the assembled transport roller can rotate in synchronization. A slot 335 extends in the flat surface 342 along the axial direction. As will be described later, the slot 335 is provided with a stopper for restricting the axial movement of the shaft 330 to which the assembled transport roller is fixed. The shaft 330 includes an outer peripheral shell 340 that forms a round outer peripheral surface other than the flat surface 342 supported by ribs 336 extending diagonally from each corner of a prism having a central cylindrical cavity 332. A cavity 334 is provided between the prism and the prism. Thus, there are many cavities in the shaft 330, which contributes to weight reduction of the shaft.

  As described above, the inner peripheral surfaces of the hole edge rib portions 316A and 316B of the upright conveying roller are fitted to the outer peripheral surface of the shaft 330, and the idling of the upright conveying roller can be effectively prevented. it can. The upright conveying roller is divided into divided rollers 312A and 312B by a split surface 320 that extends in a substantially S shape in a side view across the center hole. As will be described in detail later, if these split rollers 312A and 312B are attached to the shaft 330 and fixed so that there is no axial movement of the shaft 330, these split rollers 312A and 312B will separate and the shaft 330 will be separated. Will not be dismounted.

  FIG. 9 is a side view illustrating a state in which the upright conveying roller is separated by being divided into the dividing rollers 312A and 312B. In the drawing, the right roller piece is the divided roller 312A, and the left roller piece is the divided roller 312B. Since these split rollers have substantially the same shape, the split roller 312A will be mainly described here. Unless otherwise noted, the shapes and functions of the parts having the same reference numeral for each part of the two divided rollers are the same.

  The dividing roller 312A includes a convex portion 326A that protrudes toward the dividing roller 312B like a nose, and has a curved surface 315A that is concave downward to define the hole on the center hole. The dividing roller 312A includes a coupling surface 320A that defines a matching concave portion on the lower side of the center hole with respect to the convex portion 328B of the dividing roller 312B corresponding to the convex portion 326A of the dividing roller 312A. In the state of being combined with the dividing roller 312B, the convex portion 326A of the dividing roller 312A is fitted into the concave portion defined by the coupling surface 321B of the dividing roller 312B. Further, as will be described in detail later, the split roller 312A includes a first inclined surface 325A continuously provided on a surface substantially outside in the radial direction of the convex portion 326A, and includes an inner portion of the concave portion defined by the coupling surface 320A. A third inclined surface 323A is provided to be connected to the wall surface.

  FIG. 8 is a side view showing a state where the conveying roller of the present invention is attached to the shaft. As shown in FIG. 8, the split rollers 312A and 312B are fitted to the outer peripheral surface of the shaft 330 in a combined state. At this time, the dividing roller 312A causes the inner peripheral surface (first partial curved surface) 315A of a part of the edge defining the hole to abut on the outer peripheral surface of the shaft 330 on the central hole side of the convex portion 326A. A part of the radially outer split surface of 326A is brought into contact with a part of the split surface of the recess 326B of the split roller 312B. Therefore, in a state where the two rollers are combined and mounted on the shaft 330, a radially outward force is exerted on one of the divided rollers (for example, a force due to the weight of the divided roller itself, or each of the divided rollers is pulled in the radial direction). Force) is pushed up by the convex curved surface (bulging curved surface, first fitting surface) of the shaft 330, and the convex portion 326A matches the concave portion 326B of the dividing roller 312B. Since the movement is restricted by the surface, the engagement with the convex curved surface (bulging curved surface, first fitting surface) of the shaft 330 is not released, and the conveying roller combined with the divided rollers does not fall off. If attention is paid to the lower side in the figure, similarly, the dividing roller 312B has a shaft 330 with an inner peripheral surface (second partial curved surface 313B) of a part of the edge defining the hole on the central hole side of the convex portion 328B. A part of the radially outer split surface of the convex part 328B is brought into contact with a part 320 of the split surface of the concave part 328A of the split roller 312A. Therefore, in a state where the two rollers are combined and mounted on the shaft 330, a radially outward force is exerted on one of the divided rollers (for example, a force due to the weight of the divided roller itself, or each of the divided rollers is pulled in the radial direction). Force) is applied, the convex portion 328B is pushed down by the convex curved surface (bulging curved surface, third fitting surface) of the shaft 330, and the convex portion 328B corresponds to the concave portion 328A of the split roller 312A. Since the movement is restricted by the matching surfaces, the engagement of the shaft 330 with the convex curved surface (bulging curved surface, third fitting surface) of the shaft is not released, and the transport roller in which the divided rollers are combined is Do not fall off. Further, even when the divided rollers 312A and 312B are pulled apart from each other, the first and second partial curved surfaces engage with the outer peripheral surface of the shaft, so that the union of the divided rollers is not released. Therefore, the assembly conveyance roller can be mounted on the shaft 330 without using a coupling member or the like, and the working efficiency at the time of assembling the conveyance device or replacing the roller can be improved.

  FIG. 10 is a perspective view showing an inclined surface of the split roller 10A. As shown in FIG. 10, the dividing roller 312A includes a first inclined surface 325A that is continuous with a radially outer surface of the convex portion 326A, and an inner wall surface (second fitting) of the concave portion 328A. A third inclined surface 323A provided continuously with the surface 320A). The surface on the substantially outer side in the radial direction of the projection 326A is formed in parallel with the axial direction, but the first inclined surface 325A located further on the outer side in the radial direction has a predetermined angle with respect to the axial direction (in this embodiment, 45 °). Similarly, the inner wall surface of the recess 328A is formed in parallel with the axial direction, and the third inclined surface 323A positioned on the radially outer side is inclined at a predetermined angle (45 ° in this embodiment) with respect to the axial direction. is doing.

  Although not shown, the second inclined surface 325B and the fourth 323B of the dividing roller 312B are also inclined so as to face each inclined surface of the dividing roller 312A when they are combined.

  For example, when a plane parallel to the axial direction intersects the outer peripheral surface of the roller parallel to the axial direction, such as a roller divided along the diameter by a plane perpendicular to the side surface, the intersecting straight line (joint) Are formed in parallel with the width direction of the outer peripheral surface. The joint of the split roller is inclined with respect to the width direction of the outer peripheral surface.

  FIG. 14 is a front view showing a joint of the split rollers. An assembly conveying roller including divided rollers 312 </ b> A and 312 </ b> B is attached to the shaft 330. As described above, the split surface of the present embodiment is inclined at a predetermined angle (45 °) with respect to the axial direction of the shaft 330 in the vicinity of the outer peripheral surface, so that the joint 324 formed on the outer peripheral surface of the assembly conveying roller. Is inclined at a predetermined angle (θ = 45 °) with respect to the width direction of the outer peripheral surface 307A. Thus, when the object to be conveyed passes through the joint 324, the object to be conveyed is in point contact with the outer peripheral surface of the conveyance roller continuously along the joint 324 as the conveyance roller rotates. It is possible to reduce the impact that sometimes occurs on the conveyed object. Similarly, the joints at the opposing positions are also inclined at a predetermined angle (θ = 45 °).

  11 to 13 are perspective views showing a state in which the transport roller of the present invention is attached to the shaft. The shaft 330 is already attached to the transport device. As shown in FIG. 11, first, the hole edge rib portion 316 </ b> A of one of the divided rollers (referred to as 312 </ b> A in this embodiment) is engaged with the outer peripheral surface of the shaft 330. Next, as shown in FIG. 12, the hole edge rib part 316B of the division | segmentation roller 312B is engaged with the outer peripheral surface of the shaft 330 similarly. Then, the divided rollers are slid along the shaft 330 so as to approach each other (in the direction of the arrow), and both are combined (see FIG. 13).

  At this time, since the inclined surfaces 325A and 323A of the dividing roller 312A are opposed to the inclined surfaces 325B and 323B of the dividing roller 312B, the inclined surfaces 325A and 323A may be slid until the inclined surfaces abut. Since such inclined surfaces are in contact with each other, the movement of the divided rollers in the axial direction is limited to one direction (the direction in which they are separated) after the uniting. Therefore, for example, even if a force in the direction of the arrow X is applied to the divided roller 312A, the shaft 330 does not fall off. Further, as described above, even if a force is applied outward in the radial direction (arrow Y direction), it does not fall off. As described above, in this embodiment, the assembly conveyance roller can be held on the shaft 330 without using a fixing jig or the like.

  15 and 16 are an enlarged side view and a plan view showing a stopper which is a restricting member for positioning the transport roller of the present invention. The stopper 360 includes a main body 362 including a wide base member 364 having a convex cross section, and a screw member 370 is screwed into a female screw portion (not shown) penetrating the main body 362. The stopper 370 is attached to a slot 335 having a T-shaped cross section that extends in the axial direction of the outer periphery of the shaft 330, tightens the screw member 370, and the tip of the screw member 370 contacts the bottom 346 of the slot 335 of the shaft 330. It is fixed on the shaft 330 by contact. Then, by loosening the tightening of the screw member 370, the stopper 360 can move on the shaft 330 in the axial direction.

  After the divided rollers 312A and 312B are combined and attached to the shaft 330 as described above (see FIGS. 11 to 13), two stoppers 360 that are attached in advance to the slot 335 of the shaft 330 for each assembly conveying roller. Is moved in the direction of sandwiching the assembly conveyance roller from both sides of the shaft in the axial direction. The stopper 360 is fixed by tightening. In such a procedure, the assembly conveyance rollers are sequentially attached to the shaft 330.

  FIG. 17 is a plan view showing an assembly 311 in which a plurality of assembly conveyance rollers attached to the shaft are fixed by stoppers 360. In this embodiment, an assembly conveyance roller consisting of four sets of divided rollers 312A and 312B is attached to one shaft 330, but two sets are provided in one slot 335 for one set of assembly conveyance rollers. Four stoppers 360 are attached. Thereby, the position shift to the axial direction of an assembly conveyance roller can be prevented. In addition, since the stopper 360 fixes the hole edge rib portions 316A and 316B of the two divided rollers 312A and 312B from both sides, even if an axial force that separates the divided rollers is applied, the united formation The assembled conveyance roller can be fixed on the shaft 330 without being divided.

  When removing the assembly conveying roller from the shaft for maintenance or the like, it is necessary to apply a force to separate the split rollers 312A and 312B in the opposite direction in the axial direction after loosening the screw member 370 of the stopper 360. Good. For this reason, the assembly conveyance roller can be easily detached from the shaft 330.

  18 to 20 illustrate another embodiment of a stopper which is a restricting member according to the embodiment of the present invention. FIG. 18 is a side view in which this stopper is assembled, FIG. 19 is a virtual transparent view in which this stopper is assembled, and FIG. 20 is a side view of this stopper. The stopper 380 comes into contact with and slides on the basic member 381 inserted into the slot 335 of the shaft 330, the convex locking portion 382 that restricts one side surface of the split roller, and the inner peripheral surface of the center hole of the split roller. 20 is provided with a moving contact surface 384, a wedge-shaped protrusion 386, and an inclined surface 388. The protrusion 386 is deformable as shown by an arrow in FIG. A slit 392 is provided.

  FIG. 21 is a perspective view showing the overall configuration of a transport apparatus incorporating the transport roller of the present invention. A plurality of conveying roller units 411 each having a plurality of sets of divided rollers mounted on the shaft 430 are attached to the conveying device 400. As the shaft 430 rotates in the circumferential direction by a drive source (not shown), the transport roller 412 rotates, and a liquid crystal substrate or the like that frictionally engages the outer peripheral surface thereof is transported.

  As described above, the split type conveying roller has been described. However, the design of the dividing surface for dividing the conveying roller, the cross-sectional shape of the shaft, and the like may be changed as appropriate within the scope of the present invention. For example, you may change into the following shapes.

12A, 12B, 112A, 112B, 212A, 212B, 312A, 312B, 412A, 412B Split roller 16A, 16B, 116A, 116B, 316A, 316B, 416A, 416B Hole edge rib portion 26B, 28A, 126B, 128A, 326A, 328B, 426A, 428B, convex part 26A, 28B, 126A, 128B, 326B, 328A, 426A, 428B concave part 30, 130, 330, 430 shaft 335 slot 360, 380 stopper 400 conveying device

Claims (9)

In a disk-shaped transport roller having an outer peripheral surface that can contact the object to be transported and a center hole that can be fitted to the outer peripheral surface of the shaft,
The transport roller is composed of first and second split rollers that are split in substantially half by a split surface that crosses the center hole,
The first split roller is
A first partial curved surface which is a part of an edge defining the central hole and abuts on at least a part of an outer peripheral surface of the shaft;
In a side view of the split surface, a first convex portion protruding toward the second divided roller along the first partial curved surface;
The first convex portion is defined together with the first partial curved surface, and has a first outward partial curved surface facing the outer peripheral side and forming a split surface with the second divided roller,
The second split roller is
A second partial curved surface corresponding to the first partial curved surface at a position facing the first partial curved surface across the central hole;
A second inward partial curved surface that coincides with the first convex portion and abuts against the first outward partial curved surface from the outer peripheral side and counters a radially outward force transmitted by the first convex portion; A conveyance roller comprising: The second split roller is
In a side view of the split surface, a second convex portion protruding toward the first split roller along the second partial curved surface;
The second convex portion is defined together with the second partial curved surface, and has a second outward partial curved surface facing the outer peripheral side and forming a split surface with the first divided roller,
The first split roller is
A first inward partial curved surface that coincides with the second convex portion and abuts against the second outward partial curved surface from the outer peripheral side and counters a radially outward force transmitted by the second convex portion; The conveyance roller according to claim 1, wherein the conveyance roller is provided.   The said 1st and 2nd division | segmentation roller is divided | segmented by the inclined dividing line which inclines at a predetermined angle with respect to the rotation direction of the said conveyance roller in the said outer peripheral surface. Transport roller. A regulating member capable of relatively fixing at least the first and second divided rollers in the axial direction of the shaft;
4. The conveying roller according to claim 1, wherein the restricting member is fixed by contacting both side surfaces of an edge defining the central hole of the first and second divided rollers. 5. .   5. The transport according to claim 1, wherein the first and second divided rollers are combined and mounted on the shaft, and the movement of the shaft in the axial direction is restricted and fixed. roller. The shaft;
One or more of the conveying rollers according to any one of claims 1 to 5 attached to the shaft;
And a regulating member that regulates axial movement of the shaft of each of the mounted conveyance rollers. A disk-shaped transport roller comprising a shaft, an outer peripheral surface that can contact the object to be transported, and a central hole that can be fitted to the outer peripheral surface of the shaft is combined into approximately half by a split surface that crosses the central hole. An assembly method in a divided roller assembly comprising the first and second divided rollers,
Attaching the first divided roller to the shaft by bringing at least a part of the outer peripheral surface of the shaft into contact with an inner surface of an edge defining at least a part of the center hole of the first divided roller; ,
At least a part of the outer peripheral surface of the shaft is brought into contact with an inner surface of an edge defining at least a part of the center hole of the second split roller, and the second split roller is the shaft, Attaching to a position shifted in the axial direction of the shaft;
Combining the first and second divided rollers by sliding the first and / or second divided rollers in the axial direction of the shaft;
And a step of restricting the axial movement of the shaft of the first and / or the second divided roller. A method for assembling the divided roller assembly. A shaft used for the transport roller according to claim 1,
A shaft center hole having a common shaft center with the shaft;
A prismatic member defining the axial center hole;
Ribs extending in the diagonal direction of the cross section of the prism member;
An outer shell member defining the outer peripheral surface of the shaft;
A shaft comprising a space defined by the prism member, the rib portion, and the outer shell member. A rotating shaft that supports the transport roller of the glass substrate transport device,
An outer shell member that defines an outer peripheral surface that contacts and is supported by the conveying roller;
A shaft center hole having a common shaft center with the outer shell member;
A prismatic member defining the central hole and extending axially into the outer shell member;
Ribs extending in the diagonal direction of the cross section of the prism member;
A space portion defined by the prism member, the rib portion, and the outer shell member;
At least a part of the outer shell member has a flat surface.

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