JPH051744U - Document holding device - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent documents from shifting toward the hinge rotation axis when the support member is closed. A hinge rotatably supported by an image processing apparatus having a document setting surface, a support member supported by the hinge so as to be openable and closable with respect to the document setting surface, and a document pressing member provided below the support member. And a contact member provided at a predetermined position on the hinge rotation shaft side and the free end side of the lower end portion of the document pressing member for contacting the document setting surface, and the document pressing member serves as the supporting member. On the other hand, in the document holding device mounted so as to be movable in the vertical direction by a predetermined amount, a link having a predetermined length is provided to connect the rotation center of the hinge and the contact member on the hinge rotation shaft side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

    This invention is a platen glass for image processing devices such as copiers and image readers. The present invention relates to a document pressing device of a document transport device that transports and sets documents and the like on top.

[0002]

[Prior art]

  Conventionally, the original placed on the original placing table is processed by a copier, image reader, etc. Document transport that transports and sets documents on the platen glass (document setting surface) of the device In the feeding device, a pick-up device for feeding the original document to the downstream side of the original document table in the original traveling direction. A plurality of originals fed by the pickup roller provided by the pickup roller Are separated one by one by a separation roller, and a wide conveyor belt is provided on the downstream side. Therefore, it is configured to be transported and set on the platen glass of the image processing apparatus. There is. In such a document transport device, the transport belt faces the platen glass surface. It is arranged below the document pressing device so that it can be opened and closed.

[0003]   FIG. 6 is a partial cross-sectional view showing the structure of the main part of the conventional document pressing device 1. The document pressing device 1 is mounted on a main body device 2 such as a copying machine through a support metal fitting 3. Has been.

[0004]   The document pressing device 1 is rotated around a rotation fulcrum 4 on a support fitting 3 of a main body device 2. The hinge 5 supported as much as possible and the upper surface of the platen glass 6 of the main body device 2 on the hinge 5. A support member that is openably and closably supported with respect to the hinge stay 7, The front side plate 8 and the rear side plate 9 which are vertically provided below the stay 7, and the front side plate 8 and the rear side plate 9 And a rear side plate 9 and a conveyance belt 10 arranged in a bridge state in the width direction, and a front side plate 8. It is supported by the lower end of the rear side plate 9 so that the front end contacts the upper surface of the platen glass 6. It is composed of a front glass receiver and a rear glass receiver 12 provided, and as shown in FIG. With the stay 7 closed, the original fed from the upstream side of the conveyor belt 10 is conveyed. It is designed to be set at a predetermined position (exposure reference position) by the feeding belt 10. It

[0005]   The hinge stay 7 has a spring 13 so that the hinge stay 7 can be easily opened. Is biased in the direction of the arrow. However, if the hinge stay 7 is biased in the direction of the arrow, Since the weight of the conveyor belt 10 is large, the central portion of the hinge stay 7 swells. And the rear glass receiver 12 is lifted from the upper surface of the platen glass 6, There was a case where it could not be transported normally.

[0006]   Therefore, the front side plate 8 and the rear side plate 9 are attached by the step screws 14 and 15 as shown in the drawing. The hinge stay 7 can be moved in the vertical direction by a distance of L1 and L2. When the stay 7 is closed, even if the hinge stay 7 is bent, 2 so that the tip of the rear glass receiver 12 is on the platen glass 6 There are things that have been improved so that they do not rise above the surface. By the way, L1 = 3mm, L 2 = 5 mm, which absorbs about 2 mm of lift of the rear glass receiver 12. It is like this.

[0007]

[Problems to be solved by the device]

  However, as described above, the front side plate 8 and the rear side plate 9 are attached to the hinge stay 7. When the hinge stay 7 is attached so that it can move in the vertical direction, the rear glass While the trajectory of the tip of the receiver 12 moves clockwise around the support point of the front side plate 8, The phenomenon that the platen glass 6 comes to rest when it comes into contact with the upper surface of the platen glass 6. Sanawa Then, in the state where the hinge stay 7 is opened as shown in FIG. 7, the front side plate 8 and the rear side plate 9 are An inclined shape having an angle Q with the lower surface of the step screw 15 in contact with the upper surface of the hinge stay 7. It is in a state.

[0008]   Therefore, when the hinge stay 7 is closed from this state, the hinge stay 7 itself is closed. Although it rotates about the rotation fulcrum 4 of the jig 5, the rear glass receiver 12 of the lower end of the rear side plate 9 As shown by the arrow B, the tip is the center of rotation of the support point of the front side plate 8, that is, the step screw 14. The locus moves to draw a clockwise circular arc. Then, the hinge stay 7 As the opening angle becomes smaller, the angle Q becomes smaller, and the rear glass receiver 12 With the tip in contact with the upper surface of the platen glass 6, Q = 0, that is, the platen glass It stands still parallel to the upper surface of the roller 6. Then, the conveyor belt 10 moves the front plate 8 Since it is provided in a suspended state between the rear side plate 9 and the rear side plate 9, the tip of the rear glass receiver 12 Moves to the rear glass receiver 12 side before contacting the upper surface of the platen glass 6. . Due to this movement, the original set on the platen glass surface is placed on the rear glass receiver 1 2) (Hinge rotation axis side) shifts, and the document image reading position in the width direction is misaligned However, there is a problem that skewing occurs when the document is conveyed thereafter.

[0009]   The present invention has been made in view of the above problems in the conventional technology. An original that can prevent the original from being displaced toward the hinge rotation axis when the holding member is closed. The purpose is to obtain a draft holding device.

[0010]

[Means for Solving the Problems]

  In order to achieve the above object, the present invention provides an image processing device having a document setting surface. A hinge that is rotatably supported, and this hinge can be opened and closed with respect to the original setting surface. The supporting member supported on the original, the document pressing member provided below the supporting member, and the original pressing member. The original pressing member is provided at predetermined positions on the hinge rotation shaft side and the free end side of the lower end of the original pressing member. An original contact member that abuts the draft setting surface, and the original pressing member is attached to the support member. On the other hand, in the document holding device that is attached so as to be movable by a predetermined amount in the vertical direction , A hinge having a predetermined length for connecting the rotation center of the hinge and the contact member on the hinge rotation shaft side. I provided a link.

[0011]   In addition, at a position on the hinge side of the document pressing member and in a state in which the supporting member is closed. In a state, a line connecting the center of rotation of the hinge and the tip of the abutment member on the hinge rotation shaft side is connected. However, when the support member is opened and when the support member is closed, the contact member on the hinge rotation shaft side is The link fulcrum is set to ½ of the angle of inclination with respect to A link having a predetermined length is provided to connect the center of rotation of the hinge.

[0012]

[Action]

  According to the above configuration, the contact member on the hinge rotation shaft side and the rotation center of the hinge, or the hinge. Since the link fulcrum and the center of rotation of the hinge are connected by a link of a specified length, The tip of the abutment member on the hinge rotation axis side shifts to the hinge rotation axis side when the support member is closed. Are regulated.

[0013]

【Example】

  Next, an embodiment of the present invention will be described with reference to the drawings.

[0014]   FIG. 1 is a cross-sectional configuration diagram of a main part showing an embodiment of the present invention, which is the same as the conventional part. Are indicated by the same symbols, and the description thereof will be omitted. In the figure, the document holder of this embodiment The device 1 is provided at a position on the hinge 5 side of the rear side plate 9 and at a supporting member such as a hinge stay 7. With the door closed, make a line connecting the center of rotation 4 of the hinge 5 and the tip of the rear glass receiver 12. On the other hand, when the hinge stay 7 is opened and closed, the rear side plate 9 is attached to the hinge stay 7. The link fulcrum 16 is set at an angle ½ of the tilting angle Q, and the link fulcrum 1 A support member 17 having a rotation center 6 is provided, and the support member 17 is provided on the rear side of the rear plate 9. Fixed to the link fulcrum 16 and the hinge 4 pivot center 4 of the hinge 5 of a predetermined length The link 18 is provided.

[0015]   FIG. 2 is a view showing a state when the hinge stay 7 is opened and when the hinge stay 7 is closed, and FIG. Figure 7 shows an enlarged view around the link fulcrum 16 when the tape 7 is opened, and Figure 4 shows an enlarged view when it is closed. It is something. Below, referring to these figures and the explanatory diagram of FIG. Will be described.

[0016]   First, when the front end of the rear glass receiver 12 closes the hinge stay 7, the rear side on the hinge side In order to prevent slippage, the rear glass receiver 12 and the rotation center 4 of the hinge 5 should be It can be connected by a link of a certain length. This is the basic solution to the conventional problems It becomes a composition.

[0017]   However, in the structure shown in FIG. 1, the link is directly connected to the rear glass receiver 12. Difficult to do. Therefore, it is easiest to provide it on the rear side of the rear side plate 9. . However, there is a problem in which position it should be provided.

[0018]   As described above, the rear side plate 9 and the front side plate 8 are stepped when the hinge stay 7 is opened. It is inclined by an angle Q corresponding to the difference in length between the screws 14 and 15. And this angle Q When it reaches 0 degrees, the tip of the rear glass receiver 12 shifts rearward. Therefore, FIG. The link fulcrum 16 and the tip P of the rear glass receiver 12 when the hinge stay 7 shown in FIG. Up to L4 and the link when the hinge stay 7 is opened as shown in FIG. 5 (b). Slide it so that the length L5 from the fulcrum 16 to the tip P of the rear glass receiver 12 matches. Good. The link fulcrum 16 where this condition is satisfied is relieved when the hinge stay 7 is closed. The link fulcrum 16 is on the trajectory 20 when the fulcrum 16 rotates. It closes the hinge stay 7. When the hinge stay 7 is opened and closed in the twisted state, the rear side plate 9 is Is half an angle above the angle Q inclined with respect to.

[0019]   Therefore, the link fulcrum 16 is set at the position of such a condition, and the link fulcrum 1 A support member 17 having a rotation center 6 is provided, and the support member 17 is provided on the rear side of the rear plate 9. It is fixed to the horizontal part, and the link fulcrum 16 and the center of rotation 4 of the hinge 5 are connected together. A link 18 having a length L3 is provided.

[0020]   With this configuration, when the rear side plate 9 and the front side plate 8 open the hinge stay 7, Even if the glass is inclined by an angle Q corresponding to the difference in length between the screws 14 and 15, The length between the tip P of the hinge 12 and the rotation fulcrum 4 of the hinge 5 is the opening / closing shape of the hinge stay 7. Regardless of the condition, the length becomes "L3 + L4", and when the hinge stay 7 is closed, It is possible to reliably prevent the front end P of the glass receiver 12 from shifting rearward. So As a result, the document is shifted to the rear plate 9 side, the image reading position in the width direction is displaced, Solving problems such as skewing due to uneven transport force in the document width direction It becomes possible to decide.

[0021]   In the above-mentioned embodiment, side plates are hung vertically with respect to the hinge stay 7, The document pressing device in which the transport belt is arranged in a bridge state has been described as an example, The present invention is not limited to this, and the front side plate and the rear side plate and the conveyor belt are not limited thereto. No document is provided, only the document pressing member is provided below the hinge stay 7, and the document is simply The present invention can also be applied to a document pressing device that presses. Also, The opening / closing direction of is not limited to the front-rear direction, and the same applies to the left-right direction.

[0022]

[Effect of device]

  In short, the present invention rotatably supports an image processing apparatus having a document setting surface. The hinge that was held and the support that was supported by this hinge so that it could be opened and closed with respect to the original setting surface. Holding member, document holding member provided below the supporting member, and document holding member Are provided at predetermined positions on the hinge rotation shaft side and the free end side of the lower end of the The original pressing member has an abutting member that abuts against the supporting member. In the document holding device attached so as to be movable by a predetermined amount, the hinge A link of a predetermined length is provided to connect the center of rotation and the contact member on the hinge rotation shaft side. It is a thing. Therefore, when the support member is closed, the document is displaced toward the hinge rotation shaft side. To prevent misalignment of the image reading position in the width direction and conveyance force in the document width direction. Resolve problems such as unevenness and skew, and place the original in a stable state. Can be set.

[0023]   Then, the contact member on the hinge rotation shaft side (corresponding to the glass receiver on the rear plate side of the embodiment) If it is difficult to connect the link directly to the Contact with the hinge rotation center and the hinge rotation axis side when the support member is closed. Hinge rotation when the hinge stay is opened and closed with respect to the line connecting the tip of the member The link fulcrum is located above 1/2 of the angle Q at which the abutment member on the shaft side inclines with respect to the support member Is set, and a link of a predetermined length that connects this link fulcrum and the center of rotation of the hinge is provided. I did it. As a result, the same effect as above can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state when the hinge stay is closed and when the hinge stay is opened in FIG.

FIG. 3 is an enlarged view of a main part when a hinge stay is opened.

FIG. 4 is an enlarged view of a main part when the hinge stay is closed.

FIG. 5 is an explanatory diagram for explaining a pivot of a link mechanism.

FIG. 6 is a cross-sectional configuration diagram of main parts of a conventional document pressing device.

FIG. 7 is an explanatory diagram for explaining that a document is displaced in a conventional configuration.

[Explanation of symbols]

1 Document holding device 2 main unit 4 Rotation fulcrum of hinge 5 hinges 6 Platen glass 7 Hinge stay 8 front plate 9 Rear plate 10 Conveyor belt 11 Glass receiver of front plate (contact member) 12 Glass receiver of rear side plate (contact member) 14-stage screw 15-step screw 16 Link rotation fulcrum 18 links

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuya Katsuta             1 430 Kobayashi, Masuho-cho, Minamikoma-gun, Yamanashi Prefecture             Within ska corporation (72) Creator Akira Takei             1 430 Kobayashi, Masuho-cho, Minamikoma-gun, Yamanashi Prefecture             Within ska corporation

Claims (2)

[Scope of utility model registration request] 1. A hinge rotatably supported by an image processing apparatus having a document setting surface, a support member supported by the hinge so as to be openable and closable with respect to the document setting surface, and provided below the support member. The document pressing member includes a document pressing member and an abutting member that is provided at a predetermined position on the hinge rotation axis side and the free end side of the lower end portion of the document pressing member and comes into contact with the document setting surface. In a document holding device attached to a member so as to be movable in a vertical direction by a predetermined amount, a link having a predetermined length is provided to connect a rotation center of the hinge and a contact member on the hinge rotation shaft side. Document holding device characterized by. 2. A hinge rotatably supported by an image processing apparatus having a document setting surface, a support member supported by the hinge so as to be openable and closable with respect to the document setting surface, and provided below the support member. The document pressing member includes a document pressing member and an abutting member that is provided at a predetermined position on the hinge rotation axis side and the free end side of the lower end portion of the document pressing member and comes into contact with the document setting surface. In the document pressing device attached to the member so as to be movable in the vertical direction by a predetermined amount, at a position on the hinge side of the document pressing member,
Further, with the support member closed, the hinge rotation is performed when the support member is opened and closed with respect to a line connecting the rotation center of the hinge and the tip of the contact member on the hinge rotation shaft side. A link fulcrum is set at an angle ½ of an angle at which the abutment member on the shaft side inclines with respect to the above, and a link having a predetermined length is provided to connect the link fulcrum and the center of rotation of the hinge. Document holding device.