JP4142796B2 - Image reading apparatus and electrical apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image reading apparatus and an electric apparatus that are reduced in size by improving the mounting structure between a document conveying guide and an optical unit.
[0002]
[Prior art]
Conventionally, in this type of image reading apparatus, the upper lid of the optical unit is configured by a member separate from the document conveyance guide. This is because the optical unit is completely covered to prevent outside light, dust, or the like that may cause trouble during reading from entering the optical unit. In this way, it has been prevented that the reading ability of the image reading apparatus is lowered.
[0003]
[Problems to be solved by the invention]
However, in the conventional image reading apparatus, since the upper lid of the optical unit is formed of a member separate from the document conveyance guide, it has become an obstacle to downsizing the apparatus. On the other hand, if the top cover of the optical unit is also used as a transport guide to reduce the size of the device, the transport guide has a plurality of holes for holding the paper feed roller and transport roller. Unnecessary external light or dust may enter the optical unit from the hole and adversely affect reading.
[0004]
The present invention has been made in view of the above points, and even when the upper cover of the optical unit is also used as a transport guide, and even when the upper cover of the optical unit is also used as a transport guide, unnecessary external light, dust, etc. An object of the present invention is to prevent the reading ability of the image reading apparatus from being lowered by preventing the light from entering the optical unit.
[0005]
[Means for Solving the Problems]
A conveyance guide having holes or holes for attaching various rollers for document conveyance, conveying a document on the upper surface, and providing a wall or cover on the rear surface for blocking light entering from the outside through the hole, and a wall of the conveyance guide And an optical unit that can be directly attached to the transport guide with the upper surface open.
[0006]
By reducing the size of the image processing apparatus by using such a transport guide as the upper cover of the optical unit, even when the upper cover of the optical unit is also used as the transport guide, unnecessary external light, dust, etc., enter the optical unit. Since the entry is prevented, it is possible to prevent an adverse effect from occurring when the image reading apparatus reads an image.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
  An image reading apparatus according to a first aspect of the present invention has a hole for attaching various rollers for conveying a document, conveys the document on the upper surface, andA conveyance guide with a wall or cover that blocks light entering from the outside through the hole on the back surface, and an outer peripheral shape corresponding to the wall of the conveyance guide, and the conveyance guide is directly attached with the top open And a bracket for attaching the LED to a cover that shields light entering from the hole for attaching the roller of the conveyance guide.
[0008]
With the above configuration, the conveyance guide is also used as the upper lid of the optical unit, so that the image reading apparatus can be downsized.
[0009]
  In addition, the conveyance guide is provided with a wall or cover that blocks the entrance of external light entering from the hole of the conveyance guide that holds various rollers and dust, and the conveyance guide has an upper peripheral shape corresponding to the wall of the conveyance guide. Since it is also used as the upper lid of the optical unit, it is possible to prevent external light and dust from entering the optical unit and to reduce the size of the apparatus without degrading the reading ability of the image reading apparatus..
[0010]
  Furthermore, when the back of the transport guide is also used as the upper lid of the optical unit, the space between the transport guide and the optical unit becomes a cavity, so the place where the LED and the bracket to be mounted are attached is limited. Since the cover for blocking light and the bracket for mounting the LED are integrated, it is possible to mount the LED at an appropriate location..
[0011]
  First of the present invention2The aspect of the1In the image reading apparatus according to the above aspect, the conveyance guide is provided in the other end region for attaching the first hole and the second roller provided in one end region of the upper surface for attaching the first roller. A first wall and a second wall that block light entering from the outside through the provided second hole, and a third wall provided between the first hole and the second hole. The optical unit has a top peripheral shape so as to be coupled to the first wall and the second wall, respectively, with a cover for blocking light entering through the hole for attaching the roller.
[0012]
With such a positional relationship, the conveyance guide and the optical unit are provided with a wall, and the conveyance guide is provided with a cover, so that the reading ability of the image reading apparatus is reduced even when there are three various rollers for document conveyance. Can be efficiently prevented, and the size of the image reading apparatus can be reduced efficiently.
[0015]
  First of the present invention3The aspect of the first aspectOrFirst2Aspect ofTakeIn the image reading apparatus, the conveyance guide is formed integrally on the back surface, the holding member having an opening for penetrating the roller shaft and holding the roller shaft, and the roller shaft penetrating the hold member. And a bearing member that fits into the hold member while holding the roller shaft in a state.
[0016]
Thereby, even if it becomes a structure where it is difficult to attach various rollers to the back surface of the conveyance guide, the operation of attaching the various rollers to the conveyance guide can be easily performed.
[0017]
  First of the present invention4The aspect of the3In the image reading apparatus according to this aspect, the bearing member is adapted to be fitted to the hold member on the front side in the mounting direction.
[0018]
With this configuration, the bearing member is fitted to the hold member on the front side in the mounting direction, so that the work is performed to attach the bearing member to the hold member while visually observing the front side as viewed from the operator. As a result, the installation work can be performed efficiently.
[0019]
  First of the present invention5The aspect of the3Aspect or number4Aspect ofTakeIn the image reading apparatus, the holding member has a circular shape in the opening portion, and a shape in which the outer peripheral portion has a flat portion, and the bearing member has a holding hole for rotatably holding the shaft of the roller. And a fitting portion with the holding member formed in a planar shape outside the cylindrical portion.
[0020]
With the above configuration, since the outer peripheral portion of the hold member has a planar shape, the outer side of the bearing member is also formed with a planar shape. Therefore, even if the bearing member has a cylindrical portion, the bearing Since the bearing member is stably inserted into the hold member when the member is fitted to the hold member, the work of fitting the bearing member to the hold member can be performed smoothly.
[0021]
  First of the present invention6The aspect of the3Aspect or number4Aspect ofTakeIn the image reading apparatus, the bearing member has a fitting portion and a cylindrical portion having a holding hole for rotatably holding the roller shaft, and the fitting portion is opened to fit the holding member. And a part of fitting part is integrally formed with the cylindrical part.
[0022]
With this configuration, the roller shaft can be held without any processing on the roller shaft itself. In addition, since the bearing member can integrally hold the roller shaft and fit to the hold member with a single member, the operator can easily and efficiently assemble the image reading apparatus.
[0023]
  First of the present invention7The image reading apparatus according to the above aspect has a hole for attaching various rollers for document conveyance, is configured to convey the document on the upper surface and cover the upper part of the optical unit on the rear surface, and is integrally formed on the rear surface. A holding member having an opening for holding the shaft of the roller and holding the shaft of the roller in a state in which the shaft of the roller is passed through the holding member. A conveying guide having a bearing member to be fitted, and the conveying guide first passes the roller shaft through an opening of a holding member provided on the back surface of the conveying guide, and then from the outside of the roller. The roller is held rotatably by fitting the bearing member with the hold member while holding the roller shaft.
[0024]
With the above configuration, the bearing member is first fitted into the roller shaft from the outside to the roller shaft in a state where the roller shaft passes through the hold member. The bearing member is then moved inward along the roller axis. Thereafter, the bearing member reaches the hold member and is fitted to the hold member from the outside. Therefore, the mounting direction of the bearing member is always one direction from the outside to the inside of the roller shaft, so that the assembly of the apparatus is facilitated.
[0025]
  First of the present invention8The electrical device according to the aspect of the present invention is the first aspect to the first aspect.7The image reading apparatus according to any one of the aspects is provided.
[0026]
By including such an image reading apparatus, the electric apparatus can also use the upper lid of the optical unit as a conveyance guide, and thus the apparatus can be reduced in size. Even when the upper lid of the optical unit is also used as a conveyance guide, it is possible to prevent the reading ability from deteriorating by preventing unnecessary external light or dust from entering the optical unit.
[0027]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0028]
FIG. 1 is a cross-sectional view of an electrical device according to the present embodiment for explaining the configuration of the electrical device according to the embodiment of the present invention.
[0029]
A document table 102 for placing a document is provided on the upper surface of the rear part of the electric device 101. Since the document table 102 is provided with a document set guide 103 for adjusting the placed document, the document is fed straight into the image reading device 104 provided in the electric device 101. Further, a document tray 105 serving as an auxiliary role for the document table 102 is provided behind the document table 102 when the size of the document is large.
[0030]
The document placed on the document table 102 is moved in the direction of arrow A, and is sent into the image reading device 104 of the electric device 101 from the sheet feeding port 106. The document that has entered the image reading device 104 is sent to the document running unit 108 on the upper surface of the conveyance guide 107 provided inside the image reading device 104. The document sent to the document travel unit 108 is further fed into the image reading device 104 by a paper feed roller 109 provided in the conveyance guide 107 and reaches the document conveyance roller 110 provided in the conveyance guide 107. The document that has reached the document transport roller 110 is sent to the document discharge roller 111 by the document transport roller, and is discharged to the outside of the image reading device 104 by the document discharge roller 111.
[0031]
Further, a cover 112 is provided on the upper surface portion of the image reading apparatus 104. One end of the cover 112 is fixed, and the tip is formed to be rotatable up and down around the fixed portion. On the upper surface portion of the cover 112, an operation unit and a display unit for displaying operation contents and the like are provided. A document conveyance auxiliary roller 113 is provided below the cover 112 at a position facing the document conveyance roller 110, and a document discharge auxiliary roller 114 is disposed at a position facing the document discharge roller 111. Therefore, the document can be smoothly fed through the document running unit 108.
[0032]
Further, an optical unit 115 provided with a device for reading an image of a document is provided below the image reading device 104.
[0033]
FIG. 2 is an enlarged cross-sectional view of the conveyance guide and the optical unit according to the above embodiment for explaining the configuration and operation of the conveyance guide and the optical unit according to the above embodiment.
[0034]
The document that has reached the document conveyance roller 110 is sent by the document conveyance roller 110 onto the glass member 201 provided in the document traveling unit 108. An LED 202 that emits a light beam is attached to the lower surface of the conveyance guide 107 by a bracket 203 at a position near the lower side of the glass member 201.
[0035]
As shown in the figure, the LED 202 applies a light beam to the lower surface of the document placed on the glass member 201. This light beam is reflected from the lower surface of the document. The reflected light beam 204 reaches the first mirror 205 provided below the glass member 201 and is reflected by the first mirror 205. The light ray 206 reflected by the first mirror 205 reaches the second mirror 207 and is reflected by the second mirror 207. The reflected light ray 208 reaches the third mirror 209 and is reflected by the third mirror 209. The light beam 210 reflected by the third mirror 209 is narrowed by the lens 211, reaches the photoelectric conversion unit 212, and is photoelectrically converted by the photoelectric conversion unit 212. As a result, an electrical signal corresponding to the light intensity is output.
[0036]
Further, in the vicinity of the paper feed roller 109 on the back surface of the conveyance guide 107 and between the paper feed roller 109 and the document conveyance roller 110, light or dust entering from the hole for attaching the paper feed roller 109 is blocked. Wall 213 is provided. In addition, a wall 214 that blocks light, dust, and the like entering from the hole for attaching the document discharge roller 111 is located near the document discharge roller 111 on the back surface of the conveyance guide 107 and between the document discharge roller 111 and the LED 202. Is provided. Furthermore, light or dust entering from the hole for attaching the document conveyance roller 110 is blocked at a position between the paper feed roller 109 and the document discharge roller 111 on the back surface of the conveyance guide 107 and in the vicinity of the document conveyance roller 110. A cover 215 for covering the document conveying roller 110 is provided. A bracket 203 of the LED 202 is integrally formed with the cover 215 provided on the document conveying roller 110.
[0037]
On the other hand, at a position corresponding to the wall 213 on the upper surface of the optical unit 115, a wall 216 that blocks light, dust, and the like entering from a hole for attaching the paper feed roller 109 is provided. Further, a wall 217 for blocking light, dust, and the like entering from a hole for attaching the document discharge roller 111 is provided on the upper surface of the optical unit 115 and corresponding to the wall 214.
[0038]
Further, the front part of the wall 213 and the front part of the wall 216 intersect with the optical unit 115 as shown in the figure. Similarly, the front part of the wall 214 and the front part of the wall 217 intersect with the optical unit 115 as shown in the figure. For this reason, the effect of blocking light, dust and the like entering from the hole for attaching the paper feed roller 109 and the document discharge roller 111 is enhanced.
[0039]
On the other hand, a bracket 203 for attaching the LED 202 is integrally formed with a cover 215 that blocks light, dust, and the like entering from a hole for attaching the document conveying roller 110.
[0040]
By doing so, the back surface of the transport guide 107 is also used as the upper cover of the optical unit 115, so that the space between the back surface of the transport guide 107 and the optical unit 115 becomes a cavity, and the bracket 203 for mounting the LED 202 is fixed. Even when the mounting base is not present near the reading position and the mounting position is limited, the bracket 203 of the LED 202 is integrally formed with the cover 215 of the document conveying roller 110. It can be installed in any place.
[0041]
FIG. 3 is an exploded perspective view of the conveyance guide and the optical unit for explaining the positional relationship of the conveyance guide, the optical unit, the conveyance roller, and the bracket for attaching the LED according to the above embodiment.
[0042]
As is clear from this figure, the conveyance guide 107 is provided with openings 301, 302, and 303. Below the openings 301, 302, and 303, a paper feed roller 109, a document transport roller 110, and a document discharge roller 111 are installed, respectively. It comes out.
[0043]
Further, the document conveying roller 110 is provided with a shaft 304. A bearing member 305 for attaching to the conveyance guide 107 while holding the shaft 304 is attached to the shaft 304. The bearing member 305 is attached to the end portion and the intermediate portion of the document conveying roller 110. Although the document transport roller 110 has been described here, the document discharge roller 111 has a shaft in the same manner, and a bearing member 305 is attached thereto.
[0044]
After the document conveyance roller 110 is attached to the conveyance guide 107, a cover 215 is attached to the back surface of the conveyance guide 107 so as to cover the document conveyance roller 110. As described above, the cover 215 is integrally formed with the bracket 203 for attaching the LED 202. Therefore, the operator can attach the LED 202 to the conveyance guide 107 by attaching the cover 215 to the conveyance guide 107 in a state where the LED 202 is attached to the bracket 203.
[0045]
On the other hand, walls 216 and 217 are provided on the outer peripheral portion of the upper surface of the optical unit 115. The walls 216 and 217 prevent the optical unit 115 from entering light and dust from the outside.
[0046]
4 and 5 are perspective views of the conveyance guide according to the above embodiment as seen from the back side. With reference to these drawings, how the document transport roller and document discharge roller of the above embodiment are attached to the transport guide of the above embodiment will be described.
[0047]
As can be seen from the drawing, a hole 401 for attaching the paper feed roller 109, a hole 402 for attaching the document conveying roller 110, and a hole 403 for attaching the document discharge roller 111 are provided on the side of the conveyance guide 107. It has been.
[0048]
Further, as is apparent from the drawing, a wall 213 is provided on the back surface of the conveyance guide 107 and at a position closer to the center than the mounting position of the hole 401 and the paper feed roller 109. Further, a wall 214 is provided on the back surface of the conveyance guide 107 at a position closer to the center than the mounting position of the hole 403 and the document discharge roller 111. Since the wall 213 and the wall 214 are provided at such a position, the walls 213 and 214 block light and dust entering from the holes 401 and 403 and the openings 301 and 303.
[0049]
First, how the document transport roller 110 is attached to the transport guide 107 will be described. Hold members 404 and 405 having openings for penetrating and holding the shaft 304 of the document conveying roller 110 are provided on the back surface of the conveying guide 107. The hold member 404 is provided near the center of the back surface of the transport guide 107 and holds one end of the shaft 304, and the hold member 405 is provided near the end of the back surface of the transport guide 107 and the shaft 304. Hold the other end of the. By passing the shaft 304 of the document conveying roller 110 through the hold members 404 and 405, the movement of the document conveying roller 110 in the lateral direction with respect to the axial direction of the shaft 304 is restricted by the hold members 404 and 405.
[0050]
With the shaft 304 of the document conveying roller 110 passing through the openings of the holding members 404 and 405, the bearing member 305 is fitted from the outside of the shaft 304 of the document carry-out roller 110 in the direction of arrow a. By doing so, the bearing member 305 is fitted to the holding members 404 and 405 while holding the shaft 304 of the document conveying roller 110. In this state, the movement of the document conveying roller 110 in the direction along the axis 304 is restricted.
[0051]
At this time, protrusions 406 and 407 for locking the bearing member 305 provided on the near side in the mounting direction when viewed from the back surface of the conveyance guide 107 of the holding members 404 and 405 are provided on the upper portion of the bearing member 305. Enter the opening. As a result, the bearing member 305 is prevented from coming off the hold members 404 and 405. The state shown in FIG. 5 is this state.
[0052]
A bearing member 305 is provided at the position along the axis 304 of the document conveying roller 110 in the vicinity of the holding members 404 and 405 on the back surface of the conveying guide 107 and at the front end side of the shaft 304. Guide portions 408 and 409 are provided so as to be easily fitted to 405. The upper portions of the guide portions 408 and 409 are shaped to match the lower portion of the bearing member 305. For this reason, the bearing member 305 is smoothly and accurately fitted to the holding members 404 and 405.
[0053]
Next, how the document discharge roller 111 is attached to the conveyance guide 107 will be described. Hold members 411 and 412 for penetrating and holding the shaft 410 of the document discharge roller 111 are provided on the back surface of the conveyance guide 107. Further, protrusions 413 and 414 for locking the bearing member 305 provided on the front side in the mounting direction as viewed from the back surface of the conveyance guide 107 of the holding members 411 and 412 are provided. Further, a bearing member 305 is provided in the vicinity of the holding members 411 and 412 on the back surface of the conveyance guide 107, at a position along the axis 410 of the document discharge roller 111 and on the tip side of the shaft 410. A guide portion 415 having a shape corresponding to the shape of the lower portion of the bearing member 305 is provided so that it can be easily fitted to 412.
[0054]
Since the process of attaching the document discharge roller 111 to the conveyance guide 107 is the same as the process of attaching the document conveyance roller 110 to the conveyance guide 107, description thereof is omitted. The state shown in FIGS. 4 and 5 shows a state in which the operation of attaching the document discharge roller 111 to the document guide 107 is completed.
[0055]
Further, a fixing tool for attaching the cover 215 to the conveyance guide 107 is inserted into the back surface of the conveyance guide 107 at a position in the vicinity of the document conveyance roller 110 and between the wall 213 and the wall 214. A pair of insertion holes 416 and 417 and a pair of protrusions 418 and 419 for attaching the cover 215 to the conveyance guide 107 are provided.
[0056]
As described above, the back surface of the conveyance guide 107 originally has no barriers, so there is no problem in operation even if the roller shaft is attached by screwing. Since 213 and 214 and the cover 215 are added, the work space for fixing the shaft 304 of the document transport roller 110 and the shaft 410 of the document discharge roller 111 is narrowed. For this reason, if it is attached by screwing, it is difficult for a finger to enter, and it becomes very difficult to insert a screw into a predetermined position or to search for a screw when the screw falls, and work efficiency is greatly reduced. Therefore, in the present invention, an assembly method in which the bearing member 305 is fitted to the holding members 404, 405, 411, and 412 is adopted, and it is fixed with one touch without using a tool such as a screwdriver. high.
[0057]
FIG. 6 is a back view of the state where the cover is attached to the conveyance guide of the above embodiment for explaining how the cover is attached to the conveyance guide of the above embodiment.
[0058]
As can be seen from this figure, the document conveying roller 110 is completely covered by a cover 215. For this reason, the cover 215 completely prevents the light and dust entering from the hole 402 and the opening 302 for attaching the document conveying roller 110 from entering the optical unit 115.
[0059]
The cover 215 is provided with a pair of holes 601 and 602 for inserting a fixture. The cover 215 is attached to the conveyance guide 107 by inserting a fixture into the insertion holes 416 and 417 provided on the back surface of the conveyance guide 107 through the holes 601 and 602. Further, the cover 215 is provided with a pair of holes 603 and 604 into which a pair of protrusions 418 and 419 provided on the back surface of the conveyance guide 107 are inserted. When the projections 418 and 419 enter the holes 603 and 604, the cover 215 is securely held by the transport guide 107.
[0060]
FIG. 7A is a plan view of the bearing member of the above embodiment for explaining the bearing member of the above embodiment. FIG.7 (b) is a front view of the bearing member of the said embodiment for demonstrating the bearing member of the said embodiment. FIG.7 (c) is a side view of the bearing member of the said embodiment for demonstrating the bearing member of the said embodiment.
[0061]
The bearing member 305 is provided with a cylindrical portion 701 that holds the shafts of the various rollers 109, 110, and 111. The cylindrical portion 701 is provided with a holding hole 702 that holds the shafts 304 and 410 by penetrating them. The shape of the holding hole 702 and the shape of the shafts 304 and 410 are adapted to each other.
[0062]
On the upper part of the bearing member 305, a fitting portion 703 that fits the hold members 404, 405, 411, and 412 is provided. The fitting portion 703 is provided with an opening 704 that is open so that the protrusions 406, 407, 413, and 414 of the hold members 404, 405, 411, and 412 are fitted. Further, the cylindrical portion 701 and the fitting portion 703 are integrally formed via a connecting portion 705. Since the connecting portion 705 has an elastic force in the direction along the insertion direction of the bearing member 305, the fitting portion 703 is configured to move elastically in the vertical direction.
[0063]
The cylindrical portion 701 of the bearing member 305 has a cylindrical shape, but the fitting portion 703 that forms the outer periphery of the bearing member 305 is formed in a planar shape. Corresponding regions of the holding members 404, 405, 411, 412 and the bottom surface of the bearing member 305 are also formed in a planar shape. Thus, when the bearing member 305 is inserted into the holding members 404, 405, 411, 412, the inconvenience that the bearing member 305 rotates due to the cylindrical shape of the cylindrical portion 701 and is difficult to insert is avoided.
[0064]
FIGS. 8, 9, and 10 are enlarged perspective views of the vicinity of the holding member of the document guide of the above embodiment for explaining a process in which various rollers are attached to the conveyance guide of the above embodiment. The operation of attaching various rollers to the conveyance guide of the above embodiment will be described in detail with reference to these drawings. 8, the portion C shown in FIG. 9, and the portion D shown in FIG. 10 are enlarged perspective views of a portion corresponding to the portion A shown in FIG. 4.
[0065]
First, one end of the shaft 304 of the document conveying roller 110 is passed through the opening of the hold member 404. In this way, by allowing the shaft 304 of the document conveying roller 110 to pass through the hold member 404, the movement of the document conveying roller 110 in the lateral direction with respect to the axial direction of the shaft 304 is restricted by the hold member 404.
[0066]
Next, the bearing member 305 is moved as indicated by an arrow 801 and disposed on the guide portion 408. FIG. 8 shows this series of operations.
[0067]
Further, the shape of the lower portion of the bearing member 305 is adapted to the shape inside the guide portion 408. For this reason, the operator can smoothly fit the bearing member 305 to the hold member 404. Further, it is possible to prevent the operator from installing the bearing member 305 in the wrong direction.
[0068]
Subsequently, the bearing member 305 installed in the guide portion 408 is moved in the direction of the arrow 901 so that the holding hole 702 provided in the cylindrical portion 701 of the bearing member 305 is fitted into the shaft 304 of the document conveying roller 110. . FIG. 9 is a diagram for explaining this operation.
[0069]
In addition, since the shape of the holding hole 702 and the shape of the shaft 304 are adapted to each other, the shaft 304 is firmly held by the bearing member 305.
[0070]
Further, when the bearing member 305 installed on the guide portion 408 is moved in the direction of the arrow 901, the projection 406 provided on the hold member 404 has an opening 704 provided in the fitting portion 703 of the bearing member 305. Will fit. As a result, the bearing member 305 is held by the hold member 404. In this state, the movement of the document conveying roller 110 in the direction along the axis 304 is restricted.
[0071]
Further, since the fitting portion 703 has elasticity so as to move up and down, the fitting portion 703 moves downward after the projection 406 is fitted into the opening 704. For this reason, the protrusion 406 reliably enters the opening 704, and the protrusion 406 is prevented from coming out of the opening 704 after fitting.
[0072]
At this time, as described above, the fitting portion 703 that forms the outer periphery of the bearing member 305 is formed in a planar shape. On the other hand, the corresponding regions of the holding members 404, 405, 411, 412 are also formed in a planar shape. This prevents the bearing member 305 from rotating due to the cylindrical shape of the cylindrical portion 701 when the bearing member 305 is inserted into the holding members 404, 405, 411, 412. Therefore, it is possible to prevent unnecessary work from occurring and smoothly perform the work of fitting the bearing member 305 to the holding members 404, 405, 411, and 412.
[0073]
Further, since the protrusion 406 is on the front side in the mounting direction when viewed from the back surface of the conveyance guide 107 of the hold member 404, the operator can visually observe the work of mounting the bearing member 305 on the hold member 404. Work is done efficiently.
[0074]
8, 9, and 10, the operation of attaching the leading end portion of the document transport roller 110 to the transport guide 107 has been described. The same applies to the portion of the document transport roller 110 near the hole 402 where the document transport roller is attached. Mounted on the way. Further, the document discharge roller 111 is attached in the same manner.
[0075]
As described above, since the conveyance guide 107 of the present invention has the walls 213 and 214 and the cover 215 for shielding light on the back surface of the conveyance guide 107, the work space for attaching the various rollers 109, 110, and 111 to the conveyance guide 107. Even when the width of the rollers 109, 110 is reduced, the bearing members 305 of the present invention are fitted to the holding members 404, 405, 411, 412 so that the various rollers 109, 110 can be easily touched without using a tool such as a screwdriver. 111 can be attached to the conveyance guide 107, so that the working efficiency can be greatly improved as compared with the case where the attachment is attached by screwing.
[0076]
Further, according to the bearing member 305, a series of operations of inserting into the holding members 404, 405, 411, and 412 and holding the shafts of the various rollers 109, 110, and 111 as shown by an arrow 901 are performed in the same direction. Since it is performed by work, unlike the case of mounting by screwing, the twisting force does not act on the various rollers, and it is possible to prevent an excessive force from being applied to the holding members 404, 405, 411, 412.
[0077]
【The invention's effect】
As described above, according to the present invention, even when the upper lid of the optical unit is also used as a conveyance guide, unnecessary external light or dust can be prevented from entering the optical unit, and the reading capability of the image reading apparatus can be prevented. Can be prevented.
[0078]
In addition, according to the present invention, even if a wall or a cover is placed around the back surface of the conveyance guide so that various rollers are difficult to attach, the various rollers can be easily attached to the conveyance guide.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an electric device of an electric device according to an embodiment for explaining the configuration of the electric device according to the embodiment of the invention.
FIG. 2 is an enlarged cross-sectional view of the conveyance guide and the optical unit according to the embodiment for explaining the configuration and operation of the conveyance guide and the optical unit according to the embodiment.
FIG. 3 is an exploded perspective view of the transport guide and the optical unit for explaining the positional relationship of the transport guide, the optical unit, the transport roller, and the bracket for mounting the LED according to the embodiment;
FIG. 4 is a perspective view in a first state of the conveyance guide according to the embodiment as viewed from the back side for explaining how the document conveyance roller and the document discharge roller are attached to the conveyance guide according to the embodiment.
FIG. 5 is a perspective view in a second state of the conveyance guide according to the embodiment as viewed from the back surface for explaining how the document conveyance roller and the document discharge roller are attached to the conveyance guide according to the embodiment.
FIG. 6 is a back view of a state in which a cover is attached to the conveyance guide of the embodiment, for explaining how the cover is attached to the conveyance guide of the embodiment;
7A is a plan view of the bearing member of the above embodiment for explaining the bearing member of the embodiment. FIG.
(B) The front view of the bearing member of the said embodiment for demonstrating the bearing member of the said embodiment
(C) The side view of the bearing member of the said embodiment for demonstrating the bearing member of the said embodiment
FIG. 8 is an enlarged perspective view in a first state in the vicinity of the hold member of the document guide according to the embodiment, for explaining a process of attaching various rollers to the conveyance guide according to the embodiment;
FIG. 9 is an enlarged perspective view in a second state in the vicinity of the holding member of the document guide according to the embodiment, for explaining a process of attaching various rollers to the conveyance guide according to the embodiment;
FIG. 10 is an enlarged perspective view in a third state in the vicinity of the holding member of the document guide according to the embodiment for explaining a process in which various rollers are attached to the conveyance guide according to the embodiment.
[Explanation of symbols]
101 Electrical equipment
102 Document table
103 Document Set Guide
104 Image reading apparatus
105 Document tray
106 Paper feed slot
107 Transport guide
108 Document running section
109 Feed roller
110 Document transport roller
111 Document discharge roller
112 cover
113 Document transport auxiliary roller
114 Document discharge assist roller
115 Optical unit
201 Glass member
202 LED
203 Bracket
205, 207, 209 mirror
211 lenses
212 Photoelectric conversion unit
213, 214, 216, 217 Wall
215 covering
301, 302, 303 opening
304, 410 axes
305 Bearing member
401, 402, 403 holes
404, 405, 411, 412 Hold member
406, 407, 413, 414 Projection
408, 409, 415 guide section
416, 417 Insertion hole
418, 419 protrusion
601 and 602 holes
603,604 holes
701 Cylindrical part
702 Holding hole
703 Fitting part
704 opening
705 connecting part

Claims (8)

A transport guide having holes for attaching various rollers for transporting the document, transporting the document on the upper surface, and providing a wall or a cover on the back surface for blocking light entering from the outside through the hole; and the transport guide And an optical unit to which the conveyance guide is directly attached in a state where the upper portion is open, and shields light entering from a hole portion where the roller of the conveyance guide is attached. An image reading apparatus characterized in that a bracket for mounting the LED is integrally provided . The conveyance guide has a first hole provided in one end region of the upper surface for attaching the first roller and a second hole provided in the other end region for attaching the second roller. Through the first wall and the second wall that block light entering from the outside through the hole, and the hole for attaching the third roller provided between the first hole and the second hole. A cover for blocking light entering from the outside, while the optical unit is formed with the outer peripheral shape of the upper surface so as to be coupled to the first wall and the second wall, respectively. The image reading apparatus according to claim 1 . The conveyance guide is formed integrally on the back surface, and has a holding member having an opening for holding the roller shaft and penetrating the roller shaft into the holding member. The image reading apparatus according to claim 1 , further comprising: a bearing member that fits the hold member while holding the shaft of the roller in a state. The image reading apparatus according to claim 3, wherein the bearing member is fitted to the hold member on the front side in the mounting direction. The holding member has a circular opening, while the outer periphery has a shape having a flat portion, while the bearing member has a cylindrical portion having a holding hole for rotatably holding the roller shaft, and a mating portion of said holding member which is formed by a planar shape on the outer side of the cylindrical portion, that the image reading apparatus according to claim 3 or claim 4, characterized in. The bearing member has a fitting portion and a cylindrical portion having a holding hole for rotatably holding the roller shaft, and the fitting portion is open to be fitted to the hold member, and an image reading apparatus according to claim 3 or claim 4 wherein a portion of the mating portion, characterized in that it is formed integrally with the cylindrical portion.   It has a hole for attaching various rollers for document conveyance, is installed so as to convey the document on the top surface and cover the upper part of the optical unit on the back surface, is integrally formed on the back surface, penetrates the shaft of the roller, and Conveying having a holding member having an opening for holding a shaft, and a bearing member fitted to the holding member while holding the shaft of the roller in a state where the shaft of the roller is passed through the holding member A guide is provided, and the transport guide firstly passes the roller shaft through an opening of a holding member provided on the back surface of the transport guide, and then holds the roller shaft from the outside of the roller. An image reading apparatus, wherein the roller is rotatably held by fitting the bearing member to the hold member. Electrical apparatus claim 1 is provided an image reading apparatus according to claim 7.

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