JP5857939B2 - Roller device for conveyance - Google Patents

Description

  The present invention relates to a transport roller device.

  When a sheet-like workpiece is conveyed, a conveying roller device (simply referred to as “conveying roller”) that slides on the workpiece and guides the workpiece is generally used. There are two types of conveyance rollers: one that is arranged in a both-end support posture and the other that is arranged in a cantilever posture. The latter type has a feature that it is excellent in maintenance workability because one side can be opened.

  2. Description of the Related Art Conventionally, as a transport roller device of a type arranged in a cantilever posture, a structure in which a roller member is rotatably attached using two bearings to a shaft member having one end fixed has been proposed. (For example, patent document 1).

JP 2001-247241 A

  However, in the transport roller device described in Patent Document 1, since two bearings having the same diameter are disposed between the roller member and the shaft member, there is a problem that the diameter of the roller member increases. . On the other hand, if the diameter of the shaft member is reduced, the diameter of the roller member can be reduced. However, in the case of a type that is arranged in a cantilever position, the shaft member is easily bent at the root portion, so that rigidity is ensured. However, there was a limit to reducing the diameter of the shaft member. That is, there is a problem that it is impossible to ensure both the rigidity of the shaft member and the diameter of the roller member. In addition, in the conventional conveying roller device, it has been desired to reduce the size, reduce the cost, save resources, facilitate the manufacture, improve the usability, and improve the product life.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

(1) According to one form of this invention, the roller apparatus for conveyance arrange | positioned in a cantilever attitude | position at the attachment side part is provided. The transport roller device includes a shaft member having one end fixed to the attachment side portion and a recess provided around the outer periphery near the other end; a cylindrical roller member disposed around the outer periphery of the shaft member; A bearing disposed at a position on the mounting side portion side of the roller member, wherein an outer ring of the bearing is fixed to the mounting side portion, and an inner ring of the bearing is fixed to an outer peripheral surface of the roller member. A second bearing in which the inner ring of the bearing is fixed to the recess and the outer ring of the bearing is fixed to the inner peripheral surface of the roller member. And a bearing. Here, “fixed” may be directly connected to a fixing destination to be in a fixed state, or may be in a fixed state by interposing another member in the middle.

  According to the transport roller device of this aspect, the first bearing is disposed outside the roller member at the position on the attachment side portion side of the roller member, and the position opposite to the attachment side portion of the roller member. Then, since the second bearing is disposed in the recess of the shaft member, the distance between the outer peripheral surface of the shaft member and the inner peripheral surface of the roller member can be shortened. For this reason, even if the shaft member is made thick enough to ensure its rigidity, the diameter of the roller member does not increase by the space of the bearing as in the prior art. Therefore, there is an effect that it is possible to achieve both the rigidity of the shaft member and the reduction of the diameter of the roller member.

(2) In the transport roller device according to the above aspect, the shaft member has a base portion fixed to the attachment side portion; and is attached to the base portion and holds the outer ring of the first bearing against the base portion. You may provide the cap member to stop. According to the transport roller device of this aspect, the outer ring of the first bearing can be reliably fixed to the attachment side portion.

(3) In the transport roller device according to the above aspect, the first bearing may be disposed on an outer peripheral portion of an end portion of the roller member on the attachment side portion side. In a conventional transport roller device of a type arranged in a cantilever posture, it is easy to bend at the base portion of the shaft member. However, according to the transport roller device of this embodiment, the base portion can be reliably prevented from bending. .

  The present invention can be realized in various forms other than the above-described forms. For example, it is implement | achieved as a manufacturing apparatus of an electrolyte membrane electrode assembly provided with the roller apparatus for conveyance of this invention.

It is a longitudinal cross-sectional view of the conveyance roller which concerns on one Embodiment of this invention. It is a disassembled perspective view of the conveyance roller. It is explanatory drawing which shows the roller for conveyance of a 1st reference example. It is explanatory drawing which shows the roller for conveyance of a 2nd reference example. It is explanatory drawing which shows the manufacturing apparatus with which multiple rollers for conveyance of this embodiment were attached. It is explanatory drawing which shows that a workpiece conveyance path | route is shortened because the diameter of a roller member became small. It is explanatory drawing which shows that the exclusive area | region of a conveyance path | route is reduced by the diameter of a roller member becoming small.

Next, an embodiment of the present invention will be described.
1. Constitution:
FIG. 1 is a longitudinal sectional view of a transport roller according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the transport roller. As shown in FIG. 1, the transport roller 100 is of a type that is arranged in a cantilever posture on a side plate 200 that is an attachment side portion.

  As shown in FIGS. 1 and 2, the conveyance roller 100 includes a shaft member 10 having one end fixed to the side plate 200, a cylindrical roller member 20 disposed around the outer periphery of the shaft member 10, and the roller member 20. The first and second bearings (bearings) 30 and 40 are attached to the shaft member 10 to be rotatable, the cap member 50 is mounted on the base side (left side in the drawing) of the shaft member 10, and the shaft member. And a collar ring 61 and a nut 62 attached to the tip end side (right side in the figure).

  The shaft member 10 includes a disk-shaped base portion 11 that is a portion having the largest diameter and a columnar portion 12 that is continuous with the base portion 11. The base portion 11 is provided with a screw hole 11a, and the shaft member 10 is fixed to the side plate 200 by screwing a bolt 71 into the screw hole 11a. The cylindrical portion 12 has a stepped structure at the tip. Specifically, it has a two-step stepped structure, and has a first stepped recess 12a and a second stepped recess 12b. The second stepped recess 12b is closer to the tip than the first stepped recess 12a, and the depth of the recess, that is, the height of the step is larger. The second bearing 40 is disposed in the second stepped recess 12b.

  The roller member 20 is made of, for example, aluminum metal and has a cylindrical shape. The length of the roller member 20 in the longitudinal direction is slightly shorter than the length of the cylindrical portion 12 of the shaft member 10 in the axial direction. One end 20 a of the roller member 20 is inserted to the base of the columnar portion 12 of the shaft member 10 and reaches the base 11. The first bearing 30 is disposed on the outer peripheral portion of the end 20 a of the roller member 20. Here, the outer peripheral portion of the end portion 20a is a circumferential region having a predetermined width in the longitudinal direction from the end portion 20a.

  Each of the bearings 30 and 40 is a so-called rolling bearing, and includes outer rings 31 and 41, inner rings 32 and 42, and a plurality of balls 33 and 43 as moving bodies. The plurality of balls 33 and 43 are arranged between the outer rings 31 and 41 and the inner rings 32 and 42 to realize a smooth rolling motion.

  In the first bearing 30 disposed on the outer peripheral portion of the end 20 a of the roller member 20, the outer ring 31 is in a fixed state with respect to the side plate 200. Specifically, the fixed state is achieved by the following configuration. The cap member 50 is formed with a hole 51 through which the shaft member 10 and the roller member 20 are inserted, and a large-diameter hole 52 communicating with the hole 51. The cap member 50 is screwed to the base side (left side in the drawing) of the shaft member 10 using a bolt 72 (FIG. 2). At this time, the first bearing 30 is inserted into the large-diameter hole 52. Specifically, the outer ring 31 of the first bearing 30 is in a state of being pressed against the base 11 of the shaft member 10 by the wall surface of the large-diameter hole portion 52, and the inner ring 32 of the first bearing 30 is the large-diameter hole portion. 52 is not in contact with the wall surface. That is, the outer ring 31 is in a state of being fixed to the side plate 200 by being pressed against the base 11 by the wall surface of the large-diameter hole 52. On the other hand, the inner ring 32 is fixed to the outer peripheral surface of the roller member 20 by fitting.

  In the second bearing 40 disposed in the second stepped recess 12 b of the shaft member 10, the inner ring 42 is fixed to the shaft member 10 by being tightened by the nut 62 via the collar ring 61. At this time, the outer ring 41 of the second bearing 40 is fixed to the inner peripheral surface of the roller member 20 by fitting. The two circlips 63 and 64 are for restricting the position of the second bearing 40 and are provided so as to sandwich the second bearing 40. In addition, the inner diameter of the inner peripheral surface of the roller member 20 including the portion in contact with the second bearing 40 has a smaller inner diameter than the other portions by a minute length. Further, the outer diameter of the cylindrical portion 12 is smaller than the inner diameter of the other portion on the inner peripheral surface of the roller member 20 by a minute length. Thereby, when mounting | wearing with the 2nd bearing 40 (and 1st bearing 30), a separation state can be maintained between the inner peripheral surface of the roller member 20 and the outer peripheral surface of the cylindrical part 12 of the shaft member 10. . The distance S between the inner peripheral surface of the roller member 20 and the cylindrical portion 12 of the shaft member 10 is a half of the minute length and is extremely small.

  In the transport roller 100 having the above-described configuration, the roller member 20 operates so as to rotate about the central axis L of the shaft member 10 as a rotation axis.

2. Action / effect:
According to the transport roller 100 of the present embodiment configured as described above, the first bearing 30 is disposed outside the roller member 20 at the position on the side plate 200 side of the roller member 20, and the roller member Since the second bearing 40 is disposed in the second stepped recess 12 b of the shaft member 10 at a position opposite to the side plate 200 of the 20, the inner peripheral surface of the roller member 20 and the column of the shaft member 10. The distance S between the parts 12 can be shortened. For this reason, even if the shaft member 10 is made thick enough to ensure its rigidity, the diameter of the roller member 20 does not increase. Therefore, there is an effect that both securing the rigidity of the shaft member 10 and reducing the diameter of the roller member 20 can be achieved.

  FIG. 3 and FIG. 4 are explanatory views showing a transport roller of a reference example. These examples are conventionally known transport rollers. The conveyance roller 500 of the first reference example shown in FIG. 3 is obtained by reducing the diameter of the roller member 520. The shaft member 510 has the same dimensions up to the tip, and two bearings 530 and 540 having the same diameter are disposed between the roller member 520 and the shaft member 510. In each of the bearings 530 and 540, the inner ring is fixed to the shaft member 510 and the outer ring is fixed to the inner peripheral surface of the roller member 520. According to this configuration, as indicated by the broken line L1, the shaft member 510 is bent at the root portion, and the rigidity is insufficient. As a result, the problem that the shaft member 510 was swung and the workpiece meandered during the conveyance occurred.

  An improved first reference example is a conveyance roller 600 of the second reference example. In the conveyance roller 600 of the second reference example, the base portion of the shaft member 610 is thick, and the rigidity of the shaft member 610 is ensured. The two bearings 630 and 640 are provided in portions that are not thick and have the same diameter. According to this configuration, the rigidity of the shaft member 610 can be ensured, but the diameter of the roller member 620 becomes large.

  Compared to the transport rollers 500 and 600 of the first and second reference examples, the transport roller 100 according to the embodiment of the present invention can secure the rigidity of the shaft member 10 as described above. There exists an effect that the diameter of member 20 can also be made small. Furthermore, the following secondary effects (a) to (e) are also exhibited. In addition, the thing which does not show | play all or one part of the secondary effect of (a)-(e) also corresponds to this invention.

(A) FIG. 5 is an explanatory view showing a manufacturing apparatus 1000 to which a plurality of transfer rollers 100 of the present embodiment are attached. The manufacturing apparatus 1000 is an apparatus that manufactures an electrolyte membrane-electrode assembly for a fuel cell by transferring a catalyst layer to a polymer electrolyte membrane. The workpiece conveyed by the conveyance roller 100 is a catalyst layer formed on the support. As described above, each transport roller 100 is disposed in a cantilever posture on the side plate 200. For this reason, the side opposite to the side plate 200 of the transport roller 100 is in an open state, and the worker M can easily perform a sheet passing operation of passing a workpiece through the equipment of the manufacturing apparatus 1000.

(B) FIG. 6 is an explanatory diagram showing that the conveyance path of the workpiece W is shortened because the diameter of the roller member 20 is reduced. In the figure, a broken line indicates a roller member having a large diameter and a conveyance path in that case. From this figure, it can be seen that the conveyance path of the workpiece W is shortened by reducing the diameter of the roller member 20. For this reason, the amount of workpieces discarded for each sheet passing operation for replacing the workpiece W in the facility is reduced, and the yield is improved. This is because the conveyance path length of the work in the facility and the work to be newly set is discarded every time the paper is passed.

(C) FIG. 7 is an explanatory view showing that the exclusive region of the transport path is reduced by the reduction in the diameter of the roller member 20. In the figure, a broken line indicates a roller member having a large diameter and a conveyance path in that case. From this figure, the diameter of the roller member 20 is reduced, so that the arrangement pitch with the adjacent roller member 20 can be reduced, and as a result, it can be reduced in the vertical and horizontal directions in the figure, It can be seen that the space can be saved.

(D) Since the weight is reduced by downsizing the transport roller device, the installation work to the facility and the precision work are facilitated.

(E) Since the first bearing 30 disposed on the base side of the shaft member 10 has a larger diameter than the second bearing 40 disposed on the distal end side, the dynamic load resistance is large and the life is long.

3. Variation:
The present invention is not limited to the above-described embodiment and its modifications, and can be carried out in various modes without departing from the gist thereof. For example, the following modifications are possible.

・ Modification 1:
In the said embodiment, although the 1st bearing 30 is provided in the outer peripheral part of the edge part 20a of the roller member 20, it replaces with this and is provided in the outer peripheral part of the position away from the edge part 20a only the predetermined distance. It is good also as a structure. In short, it can be configured to be provided at any position as long as the position is closer to the attachment side than the center in the longitudinal direction of the roller member. In addition, rotation of a roller member can be stabilized more, so that the position to provide is near an attachment side part.

Modification 2
In the said embodiment, although the 2nd stepped recessed part 12b by which the 2nd bearing 40 is arrange | positioned is comprised by the front-end | tip part used as the stepped structure of the shaft member 10, it replaces with this and the cylinder of the shaft member 10 An annular groove may be formed in the portion 12, and a second bearing may be provided in the groove. Further, it is not always necessary to dispose at the tip portion of the shaft member, and it may be disposed at any position as long as the position is on the opposite side of the attachment side portion from the center in the longitudinal direction of the roller member. In short, as long as the recess is provided around the outer periphery in the vicinity of the end opposite to the mounting side portion of the shaft member, the recess may have any position and shape.

・ Modification 3:
In the above-described embodiment, the base 11 of the shaft member 10 and the cap member 50 are screwed by the bolts 72. However, instead of this, it may be configured to be detachable by fitting.

  The present invention is not limited to the above-described embodiments, examples, and modifications, and can be realized with various configurations without departing from the spirit thereof. For example, the technical features in the embodiments, examples, and modifications corresponding to the technical features in each embodiment described in the summary section of the invention are to solve some or all of the above-described problems, or In order to achieve part or all of the above effects, replacement or combination can be performed as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Shaft member 11 ... Base part 11a ... Hole 12 ... Cylindrical part 12a ... 1st stepped recessed part 12b ... 2nd stepped recessed part 20a ... End part 30 ... 1st bearing 31 ... Outer ring 32 ... Inner ring 33 ... Ball 40 ... Second bearing 41 ... Outer ring 42 ... Inner ring 43 ... Ball 50 ... Cap member 51 ... Hole 52 ... Large diameter hole 61 ... Color ring 62 ... Nut 63 ... Circlip 71 ... Bolt 72 ... Bolt 200 ... Side plate 1000 ... Manufacturing apparatus

Claims (3)

A roller device for conveyance arranged in a cantilever posture on the mounting side,
A shaft member having one end fixed to the mounting side and a recess provided around the outer periphery near the other end;
A cylindrical roller member disposed around the outer periphery of the shaft member;
A bearing disposed at a position on the mounting side portion side of the roller member, wherein an outer ring of the bearing is fixed to the mounting side portion, and an inner ring of the bearing is fixed to an outer peripheral surface of the roller member. Bearings,
A second bearing in which an inner ring of the bearing is fixed to the recess and an outer ring of the bearing is fixed to an inner peripheral surface of the roller member. A roller device for transportation. It is the roller apparatus for conveyance of Claim 1, Comprising:
The shaft member has a base portion fixed to the attachment side portion,
A roller apparatus for conveyance, comprising a cap member that is mounted on the base and holds the outer ring of the first bearing against the base. It is the roller apparatus for conveyance of Claim 1 or Claim 2, Comprising:
The said 1st bearing is a roller apparatus for conveyance arrange | positioned at the outer peripheral part of the edge part by the side of the said attachment side part of the said roller member.

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