JP2007039170A - Carrying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carrying device capable of reducing processing cost and material cost and also reducing the size. <P>SOLUTION: A driven roller 63 is manufactured by connecting shaft members 71b of roller units 71 with shaft members 72b in both end parts of a roller unit 72 via couplings 81 having outer diameter smaller than that of the rollers 71a, 72a, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a transport device for transporting a recording medium.

In a photographic processing apparatus, photographic paper of various width sizes is often conveyed and exposure processing is performed on the photographic paper. Therefore, this photographic processing apparatus is provided with a pair of conveying rollers that can be crimped over the entire width of the widest photographic paper. The pair of transport rollers has a pair of transport rollers. In particular, in the transport roller pair of the exposure transport unit disposed in the vicinity of the exposure position, in order to obtain a high-quality image, the outer diameter and vibration of the transport rollers are highly accurate. Accuracy is required.
JP 2002-332138 A (FIG. 2)

  However, as a matter of course, the conveyance rollers of the conveyance roller pair for conveying the wide photographic paper are relatively long. Therefore, the integral processing of the transport roller is a very complicated process, and the processing cost increases. In addition, when a highly accurate outer diameter or runout accuracy is required, such as the transport roller of the exposure transport unit, the material of the transport roller must have high rigidity. For this reason, the length of the transport roller is long and the thickness of the material needs to be increased, which significantly increases the material cost. In addition, since the weight of the transport roller is increased, the handling of components during printer assembly is deteriorated.

  Then, the main objective of this invention is to provide the conveying apparatus which can reduce processing cost and material cost.

  Another object of the present invention is to provide a transport device that can be miniaturized.

Means for Solving the Problems and Effects of the Invention

  The conveying device of the present invention is a conveying device that includes a conveying roller that conveys a recording medium having a predetermined width. The conveying roller includes a plurality of roller units each having a shaft member and a roller held by the shaft member. And an outer diameter smaller than the outer diameter of the roller, and a shaft coupling for connecting shaft members of the plurality of transport roller units.

  According to this configuration, a transport roller capable of transporting a wide recording medium can be manufactured by connecting a plurality of roller units via a shaft coupling having an outer diameter smaller than that of the roller. In this case, since the length of each roller unit becomes relatively short, the processing cost can be reduced. Further, a thin conveying roller is sufficient, and the cost of the material can be reduced. And while the length of each roller unit becomes short and a single-piece | unit weight becomes light, the handling property at the time of the distribution of each roller unit and an assembly improves.

  In the transport device of the present invention, the shaft coupling may be a cellar conical shaft coupling.

  According to this configuration, a plurality of roller units can be concentrically coupled, and all the connected roller outer peripheral runout accuracy can be within the required accuracy. In addition, by using the cellar conical shaft joint, it is possible to prevent deterioration of the roller partial runout accuracy when a roller shaft having a minute diameter error is connected.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a photographic processing apparatus in which a conveying apparatus according to an embodiment of the present invention is used.

  A photographic processing apparatus 1 shown in FIG. 1 is a photographic processing apparatus employing a digital scanning exposure method using a laser beam, and includes a scanner unit 20, a printer unit 30, a processor unit 40, and a finishing processing unit 50. is doing. In addition, the photo processing apparatus 1 is loaded with paper magazines 31 and 32, and the long photographic paper 2 stored in them is described later along a path 18 indicated by a one-dot chain line in FIG. The cutter 34 is conveyed. The photographic paper 2 cut to a predetermined length along the width direction by the cutter 34 is conveyed along the path 18 from the printer unit 30 to the finishing processing unit 50 via the processor unit 40.

  The scanner unit 20 mainly performs reading processing of images recorded on each frame of the film, and various processing such as digital conversion on the read image data. The printer unit 30 mainly performs an exposure process based on digital image data on the photographic paper 2 that is a photosensitive medium. In the processor unit 40, the exposed photographic paper 2 is subjected to processing such as development, bleach-fixing, and stabilization. In the finishing processing unit 50, the photographic paper 2 on which the image discharged from the processor unit 40 has been actualized is subjected to a drying process, and the photographic paper 2 that has been dried and discharged from the discharge port 19 is sorted for each order. .

  The scanner unit 20 includes a film mounting unit 21 on which a film is mounted, and a scanner light source unit 22 in which a light source that irradiates the film during scanning is stored. An imaging element (not shown) such as a CCD for taking a film image is disposed below the film mounting unit 21. An image signal output from the image sensor is digitally converted by an A / D converter (not shown) and then supplied to the control unit 10.

  The printer unit 30 accommodates each of the wound long photographic papers 2 and selectively uses two paper magazines 31 and 32, and an advance unit that pulls out the photographic paper 2 from the paper magazines 31 and 32. 33, a cutter 34 for cutting the photographic paper 2 having a predetermined width drawn from the paper magazines 31 and 32 into a desired length according to the print size along the width direction, and a photosensitive emulsion layer of the photographic paper 2 are formed. A printing unit 35 for printing a desired character on an unfinished surface (back surface), and a chucker 36 for conveying the photographic paper 2 cut to a desired length in parallel in two to three rows up to the front stage of the exposure position; , An exposure unit 3 for performing an exposure process on the photographic paper 2 and an exposure conveyance device 60 that controls the conveyance speed of the photographic paper 2 at the exposure position by the exposure unit 3.

  The processor unit 40 includes processing tanks 41a to 41f for performing development, bleach-fixing, and stabilization processes on the photographic paper 2 supplied from the printer unit 30, and processing liquid stored in the processing tanks 41a to 41f. , Replenishing tanks 42 a to 42 c, a plurality of roller pairs 43 for conveying the photographic paper 2, and a motor (not shown) for driving the roller pairs 43.

  The finishing processing unit 50 has a heater 51 for quickly drying the photographic paper 2 discharged from the processor unit 40 and a belt for conveying the photographic paper 2 discharged from the discharge port 19 in the direction perpendicular to the paper surface of FIG. A conveyor 52, a plurality of roller pairs 53 for conveying the photographic paper 2 and a motor (not shown) for driving the roller pairs 53 are provided.

  Further, the photo processing apparatus 1 shown in FIG. 1 includes a control unit 10 that controls the operation of each unit, a display 25 that displays various information related to the photo processing apparatus 1 and notifies the operator, and inputs to the photo processing apparatus 1. A keyboard (not shown) for operation is provided.

  Next, the configuration of the exposure conveyance device 60 of the printer unit 30 will be described with reference to FIGS. FIG. 2 is a diagram showing a schematic configuration of the exposure transport apparatus. FIG. 3 is a diagram showing a schematic configuration of the driven roller.

  The exposure transport device 60 includes an exposure transport roller pair 61 and an exposure transport roller pair 65. The exposure transport roller pairs 61 and 65 are arranged so as to sandwich the exposure position by the exposure unit 3. That is, the exposure transport roller pair 61 is disposed upstream from the exposure position, and the exposure transport roller pair 65 is disposed downstream from the exposure position.

  The exposure conveyance roller pair 61 has a driving roller 62 and a driven roller 63 that are two conveyance rollers, and the exposure conveyance roller pair 65 has a driving roller 66 and a driven roller 67 that are two conveyance rollers. is doing. The drive roller 62 is an integrally formed roller, and its outer diameter is thick in order to obtain a highly rigid long roller. The driven roller 63 has two roller units 71, one roller unit 72, and a shaft coupling 81 that connects them. Similarly, the driving roller 66 is an integrally formed roller, and its outer diameter is thick in order to obtain a long roller with high rigidity. The driven roller 67 has two roller units 73, one roller unit 74, and a shaft coupling 82 that connects them. Here, the driven rollers 63 and 67 can move to a pressure-bonding position where the photographic paper is sandwiched between the driving rollers 62 and 66 and a release position where the photographic paper is not sandwiched. In FIG. 2, the moving directions of the driven rollers 63 and 67 are indicated by arrows.

  Here, since the configuration of the driven rollers 63 and 67 is the same, in the following description, the configuration of the driven roller 63 will be described in detail. That is, the configuration of the roller units 71, 72, 73, 74 and the configuration of the shaft couplings 81, 82 are substantially the same.

  As described above, the driven roller 63 includes the two roller units 71, the one roller unit 72, and the shaft coupling 81 that connects them. As shown in FIG. 3A, the roller unit 71 includes three columnar rollers 71a connected in a straight line and shaft members 71b disposed at both ends thereof. The roller unit 72 includes four columnar rollers 72a connected in a straight line, and shaft members 72b disposed at both ends thereof. Here, the outer diameter of the shaft member 71b and the outer diameter of the shaft member 72b are the same. Then, the shaft member 71b of the roller unit 71 is connected to the shaft member 72b at both ends of the roller unit 72 via the shaft coupling 81, so that the driven roller 63 is moved as shown in FIG. Complete.

  Further, as shown in FIG. 2, the drive rollers 62 and 66 are rotatably held by two bearing holders 91 disposed in the vicinity of both ends thereof. On the other hand, the driven rollers 63 and 67 are rotatably held by four bearing holders 92 disposed in the vicinity of both ends thereof and in the vicinity of the shaft couplings 81 and 82. Thus, since the driven rollers 63 and 67 are held not only by the bearing holders 92 in the vicinity of both ends thereof but also in the bearing holders 92 in the vicinity of the shaft couplings 81 and 82, high rigidity can be obtained with a thin outer diameter roller.

  Next, the structure of the shaft coupling 81 which is a seller conical shaft coupling will be described with reference to FIGS. 4 and 5. FIG. 4 is an external perspective view of the shaft coupling, FIG. 4 (a) shows a state after fastening, and FIG. 4 (b) shows a state before fastening. 5 is a cross-sectional view of the shaft coupling, FIG. 5A is a cross-sectional view taken along line AA in FIG. 4A, and FIG. 5B is a cross-sectional view taken along line BB in FIG. FIG.

  The shaft coupling 81 includes a male screw-integrated outer cylinder member 100, a female screw-integrated outer cylinder member 110, and two inner cylinder members 120 and 130.

  The outer cylinder member 100 is a cylindrical member having an outer diameter smaller than the outer diameter of the transport rollers 71a and 72a, and a male screw is formed at one end 101 of the outer peripheral surface thereof. Further, as shown in FIG. 5 (b), one end portion of the inner peripheral surface of the outer cylinder member 100 communicates with the circular step portion 102 and the bottom portion of the step portion 102 and extends toward the other end portion. A tapered portion 103 is formed. The tapered portion 103 has a tapered shape in which the opening area decreases from one end to the other end.

  The outer cylinder member 110 is a cylindrical member having an outer diameter smaller than the outer diameter of the transport rollers 71a and 72a, and an internal thread is formed at one end 111 of the inner peripheral surface thereof. Here, the male screw of the outer cylinder member 100 and the female screw of the outer cylinder member 110 can be screwed together. Further, as shown in FIG. 5B, a circular step 113 is formed at the bottom of the internal thread forming portion on the inner peripheral surface of the outer cylinder member 110. Here, the inner diameter of the step 113 is substantially the same as the outer diameter of the inner cylinder member 120. Therefore, the end portion of the inner cylinder member 120 can be fitted into the step portion 113.

  The inner cylinder member 120 is a cylindrical member smaller than the outer diameter of the outer cylinder members 100 and 110. Therefore, as will be described later, when the outer cylinder member 100 and the outer cylinder member 110 are fastened, the inner cylinder member 120 is accommodated in the outer cylinder members 100 and 110. Further, the outer diameter of the inner cylinder member 120 is the same over its entire length, and the inner peripheral surface thereof has a tapered shape in which the opening area increases from the one end portion 121 toward the other end portion 122.

  The inner cylinder member 130 is a cylindrical member that is smaller than the outer diameter of the inner cylinder member 120. And the slit 131 extended over the full length is formed in the inner cylinder member 130, as shown in FIG.4 (b). Therefore, when the gap between the slits 131 is narrowed by applying force from the outside, the outer diameter and inner diameter of the inner cylinder member 130 are decreased. Moreover, the inner diameter of the inner cylinder member 130 is the same over the entire length, and the outer peripheral surface thereof has a tapered shape in which the outer diameter decreases from the longitudinal central portion 132 toward both end portions 133 and 134. Here, the tapered shape of the outer peripheral surface of the inner cylindrical member 130 is substantially the same as the tapered shape of the inner peripheral surface of the outer cylindrical member 100 and the tapered shape of the inner peripheral surface of the inner cylindrical member 120.

  Next, how the shaft members of the two roller units are connected will be described with reference to FIG. FIG. 6 is a diagram illustrating a state of a connecting portion between the roller units.

  When the roller unit 71 and the roller unit 72 are connected, as shown in FIG. 6A, the end of the shaft member 71b and the end of the shaft member 72b are abutted. At this time, the shaft member 71 b and the shaft member 72 b are fitted and inserted into the outer cylinder member 100, the outer cylinder member 110, and the inner cylinder members 120 and 130 constituting the shaft coupling 81, respectively. Here, the end of the inner cylinder member 120 is fitted into the step 113 of the outer cylinder member 110, one end of the inner cylinder member 130 is in the inner cylinder member 120, and the other end is in the outer cylinder member 100. Has been placed.

  At this time, no force is applied to the outer peripheral surface of the inner cylindrical member 130 from the inner peripheral surface of the outer cylindrical member 100 and the inner peripheral surface of the inner cylindrical member 120, so the slit 131 of the inner cylindrical member 130 is in its original state. The gap is maintained. Therefore, a gap is formed between the inner peripheral surface of the inner cylinder member 130 and the outer peripheral surface of the shaft member 71 b of the roller unit 71 and the outer peripheral surface of the shaft member 72 b of the roller unit 72.

  When the male screw of the outer cylinder member 100 and the female screw of the outer cylinder member 110 are screwed together, the one end portion 133 of the inner cylinder member 130 moves along the tapered surface of the inner peripheral surface of the inner cylinder member 120. The other end 134 moves along the tapered surface of the inner peripheral surface of the outer cylinder member 100. Then, a force is applied to the outer peripheral surface of the inner cylindrical member 130 from the inner peripheral surface of the outer cylindrical member 100 and the inner peripheral surface of the inner cylindrical member 120, so that the slit 131 of the inner cylindrical member 130 becomes gradually narrower and finally The gap of the slit 131 is eliminated. Then, there is no gap between the inner peripheral surface of the inner cylinder member 130 and the outer peripheral surface of the shaft member 71b of the roller unit 71 and the outer peripheral surface of the shaft member 72b of the roller unit 72, as shown in FIG. The inner peripheral surface of the inner cylinder member 130 comes into contact with the outer peripheral surfaces of the shaft member 71b and the shaft member 72b. In this way, the shaft member 71 b of the roller unit 71 and the shaft member 72 b of the roller unit 72 are connected via the shaft coupling 81.

  As described above, the exposure transport apparatus 60 according to the present embodiment includes the transport roller pairs 61 and 62 having the driving rollers 62 and 66 and the driven rollers 63 and 67. And the driven rollers 63 and 67 are produced so that the wide photographic paper 2 can be conveyed by connecting a some roller unit via the shaft couplings 81 and 82 whose outer diameter is smaller than a roller. In this case, since the length of each roller unit becomes relatively short, the processing cost can be reduced. Further, a thin conveying roller is sufficient, and the cost of the material can be reduced. And while the length of each roller unit becomes short and a single-piece | unit weight becomes light, the handling property at the time of the distribution of each roller unit and an assembly improves. Further, since the weight of each roller unit is reduced, it is also convenient for a mechanism for performing the pressure-bonding / release operation of the photographic paper by the movement of the driven rollers 63 and 67 in the exposure transport device 60.

  Further, since the roller unit is manufactured by lathe processing, it is considered that the coaxial accuracy between the roller portion outer periphery and the shaft portion outer periphery can be easily obtained with high accuracy. Then, by connecting a plurality of roller units via shaft joints 81 and 82, which are cellar conical shaft joints, a plurality of roller units can be concentrically coupled, and all the connected roller peripheral runout accuracy is within the required accuracy. Can be. Further, by using the shaft joints 81 and 82 which are cellar conical shaft joints, it is possible to prevent deterioration in roller partial runout accuracy when a roller shaft having a minute diameter error is connected.

  Further, the shaft couplings 81 and 82 are not configured to fasten the flanges of the outer peripheral portions of the two outer cylinder members with bolts, unlike the conventional seller conical shaft coupling 150 shown in FIG. By providing a coupling screw concentric with the shaft, it becomes possible to eliminate the flange at the outer peripheral portion, and the outer diameter of the shaft coupling becomes compact.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various design changes can be made as long as they are described in the claims. . For example, in the above-described embodiment, the configuration of the roller units of the driven rollers 63 and 67 that are transport rollers can be changed. Therefore, the number of connected roller units and the number of rollers of each roller unit may be changed.

It is a figure which shows schematic structure of the photographic processing apparatus with which the conveying apparatus which concerns on embodiment of this invention is used. It is a figure which shows schematic structure of an exposure conveyance apparatus. It is a figure which shows schematic structure of a driven roller. It is an external appearance perspective view of a shaft coupling, Fig.4 (a) is the state after fastening, FIG.4 (b) is the state before fastening. FIG. 5A is a cross-sectional view taken along line AA in FIG. 4A, and FIG. 5B is a cross-sectional view taken along line BB in FIG. 4B. is there. It is a figure which shows the state of the connection part between roller units. It is a perspective view of the conventional cellar conical shaft coupling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Photo processing apparatus 60 Exposure conveyance apparatus 62 Drive roller 63 Driven roller 66 Drive roller 67 Driven rollers 71-74 Roller unit 71a, 72a Roller 71b, 72b Shaft member 81, 82 Shaft coupling 100 Outer cylinder member 110 Outer cylinder member 120 Inner cylinder Member 130 Inner cylinder member

Claims (2)

In a transport device having a transport roller for transporting a recording medium having a predetermined width,
The transport roller is
A plurality of roller units each having a shaft member and a roller held by the shaft member;
The conveying apparatus having an outer diameter smaller than the outer diameter of the roller and having a shaft coupling that connects shaft members of the plurality of conveying roller units. The conveying device according to claim 1, wherein the shaft coupling is a cellar conical shaft coupling.

Images