JPH0815790A - Original press-contacting plate - Google Patents

Abstract

PURPOSE:To stop an original press-contacting plate in an open state without being affected by the weight and the position of a center of gravity, etc., by installing a supporting member for supporting the original press-contacting plate in an open state and a releasing means for releasing the supporting means from supporting the original press-contacting plate, as to the original press- contacting plate for press-contacting a large-sized original. CONSTITUTION:The original press-contacting plate supporting member 4 is always pressed in the direction shown by an arrow E by a spiral coil spring 9 installed on the connection part with the image reader 3. The engagement position of a pin 4a and a groove 1a is shifted in accordance with the releasing angle of the original press-contacting plate 1, and the pin 4a is controlled by a locking member 5 so that it may return to a position in a press-contact state. The locking member 5 is pressed by a spring 6 toward the supporting member 4 while being controlled by a guide pin 1b so as to be moved in a direction shown by an-arrow A. And when the plate 1 begins to close by gravity, the pin 4a is rotated in the direction shown by the arrow E and begins to return the home position, but 11 is made to be in a state held by the locking member 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manuscript pressure plate for crimping a manuscript on a manuscript table used in a manuscript handling device such as an image reading device.

[0002]

2. Description of the Related Art Conventionally, a document crimping plate in an image reading apparatus or the like is rotated around a hinge portion so that a crimping position at which a document placed on a document is crimped and a crimping of the document are released to an upward direction. It is configured to be openable and closable between an open position where it stops in the open state. And, the hinge part is Japanese Patent Sho 59
-A damper as shown in No. 26013 etc. is provided, and the force of the spring of the damper part and the weight and center of gravity of the original pressure plate can be balanced according to the angle when the original pressure plate is opened. It was configured to stop at various angles.

[0003]

However, in the case of the above-mentioned prior art, since the weight of the original pressure plate is balanced with the spring pressure of the damper to stop the original pressure plate in the opened state, the spring pressure is The weight and the position of the center of gravity of the original pressure plate had to be set accurately. Therefore, when the original pressure plate is enlarged in order to accommodate a large-size original, the change in weight due to variations in the specific gravity of the material of the original press plate becomes large, and it becomes difficult to balance the spring pressure of the damper. There was a problem. For example,
If the original pressure plate is too heavy, the spring pressure of the damper will be lost and it will not be possible to stop the original pressure plate in the open state, and it will close when the user releases his hand.If the original pressure plate is too light, The pressure of the spring of the damper becomes relatively strong, so that the original pressure plate cannot stop at the position where the original is pressed, or it opens too much.

Further, in Japanese Patent Publication No. 59-26013, the spring pressure is adjusted in order to prevent this, but it is necessary to adjust each original pressure plate, and it takes time and the cost is high. Was becoming.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is not to be influenced by the weight or the position of the center of gravity in a document pressure plate for pressure-bonding a large-sized document. Another object of the present invention is to provide a document handling device capable of stopping the document pressure plate in an open state.

[0006]

Therefore, the present invention comprises a support member for supporting the original pressure plate in an open state, and a release means for releasing the support of the support member to the original pressure plate. It is characterized by

[0007]

According to the present invention, even in a document pressure plate for pressure-bonding a large-sized document, the document pressure plate can be stopped in an open state without being affected by the weight or the position of the center of gravity without adjustment.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a document reading apparatus will be described below with reference to FIGS.

FIG. 1 and FIG. 2 are perspective views of main parts of a document reading apparatus embodying the present invention.

FIG. 3 is a top view of the main part of FIG. 4 and 5 are side views of FIGS. 1 and 2, respectively.

FIGS. 1, 3, and 4 are views showing a state in which the original pressure plate is closed to press the original, and FIGS. 2 and 5 are views showing the state in which the original press plate is opened.

In this document reading apparatus, the document pressure plate 1 is rotatably attached to a hinge mounting portion 3a of an image reading apparatus 3 as a document handling apparatus by a hinge 2.

As shown in FIG. 1, one side of the original pressure plate support member 4 is rotatably fixed to the image reading device 3, and the other side of the original pressure plate support member 4 has a pin 4a which moves in a groove 1a which is an engaging portion of the pressure plate 1. Engage as much as possible.

Further, the original document pressure supporting member 4 is the image reading device 3.
A torsion coil spring 9 provided at the connecting portion with is constantly biased in the direction of arrow E. The pin 4a changes its engagement position with the groove 1a according to the opening angle of the original pressure plate 1, and restricts the lock member 5 from returning the pin 4a to the position in the pressure-bonded state. The lock member 5 is regulated by a guide pin 1b provided on the original pressure plate 1 so as to be movable in the arrow A direction, and is biased by a spring 6 toward the original pressure plate support member 4. The pin 4a is provided when the original pressure plate 1 is opened.
While moving in the direction of arrow B shown in FIGS. 3 and 4, at this time, the pin 4a moves while pushing up the slope 5a of the contacting lock member 5 in the direction of arrow A.

When the user releases his hand and tries to close the original pressure plate 1 by its own weight, the pin 4a rotates in the direction of arrow E and tries to return to its original position, but the pin 4a is held by the lock member 5 and is held in FIGS. It becomes the state shown by. Also, the lock member 5
Has a plurality of lock portions 5b, and an opening angle capable of stopping by that number is obtained.

When a user places an original on the original table 10 and closes the original press plate 1 to press the original, the original press plate 1 is provided to operate the lock member 5 as a releasing means. The release lever 7 rotatable about the rotary shaft 1c is grasped and rotated in the direction of arrow C in FIG. The links 8a, 8b, 8c provided in the original pressure plate 1 move in the directions of arrows D shown in FIG. 3 by the rotation of the lever 7, and the lock member 5 urged by the spring 6 is attached to the original pressure plate 1. It is moved in the direction of arrow A away from the support member 4. As a result, the pin 4a becomes movable in the direction of the arrow F shown in FIG. 5, and the state shown in FIG. 1 and FIG.

The link 8 is composed of three links 8a, 8b, 8c.
The link 8a is connected to the release lever 7 at the pin 8f and is connected to the link 8b at the pin 8e.
Is transmitted to the link 8b. The link 8b is rotatably attached to a pin 1d provided on the original pressure plate 1. The link 8c is connected to the link 8b and the lock member 5 at two pins 8d.

Further, in this embodiment, when closing the original cover 1, the release lever 7 must be grasped until the pin 4a reaches an open angle where it is not supported by the lock portion 5b. A mechanism for holding the release lever 7 in the operated state until 1 is closed may be provided.

[Description of Second Embodiment] A second embodiment of the present invention will be described with reference to FIGS. 6 to 10.

6 and 7 are perspective views of the main part of the document reading apparatus embodying the present invention. 8 is a top view of the main part of the original pressure plate, and FIG. 9 is an enlarged view of the main part of FIG. FIG. 10 is a side sectional view of the main part of FIG.

6 and 9 and 10 show a state in which the original pressure plate is closed to press the original, FIG. 7 shows a state in which the original press plate is opened, and FIG. 8 shows the original press. FIG. 7 is a plan view of the document pressure plate when the plate is held open.

The construction of the entire apparatus in this embodiment is substantially the same as that described in the first embodiment, and the same parts are designated by the same reference numerals and the description thereof will be omitted.

In the present embodiment, as shown in FIG. 6, the original pressure plate support member 14 is built in the storage portion 11a provided on the side surface of the original pressure plate 11. Original document pressure supporting member 14
Is rotatable about a rotation center 11d provided on the original pressure plate and is biased by a spring 16 toward a release cam 19. A locking member 15 (locking groove) is provided at a portion of the image reading device 3 corresponding to the document pressure plate support member 14 in a state where the document pressure plate is opened.
When the document pressure plate 11 is opened, the document pressure plate support member 14 has the claw portions 14a of the document pressure plate support member 14 engaged with the locking member 1.
The state of being locked by 5 and being opened is retained, as shown in FIG.

The original table 1 is opened by releasing the original pressure plate 11.
To press the original on 0, the release lever 17 is rotatable around the rotary shaft 11c provided on the original pressing plate 11.
Is operated in the direction of arrow A shown in FIG. 7 to operate the release cam 19 which is the release means. By operating the release lever 17, the link 18 provided in the original pressure plate 11 moves in the direction of arrow B in FIG. 8 via the pin 18a, and the connecting portion 19b.
The release cam 19 which rotates around the rotation center 11b of the original pressure plate 11 is rotated in the direction of arrow C through. The contact portion 19a of the release cam 19 with the original pressure plate support member 14 is
The release portion 14b of the original document pressing support member 14 is pressed to rotate the original document pressing member 14 in the direction of the arrow D, so that the locking member 15 moves to the claw portion 1.
4a is released to release the support of the original pressure plate.

Further, in the present embodiment, the number of the locking members is one, but a plurality of locking members may be provided to support the original pressure plate in multiple stages.

[Third Embodiment] A third embodiment of the present invention will be described with reference to FIGS. 11 to 17.

11 and 12 are perspective views of the main part of the document reading apparatus embodying the present invention. 13 and 14 are side views of FIGS. 11 and 12, respectively. FIG. 15 shows FIG.
2 is a cross-sectional top view of the main part of FIG. FIG. 16 is a perspective view of the groove portion of the original pressure plate. FIG. 17 is an enlarged view of a main part of FIG.

Further, FIGS. 11 and 13 and 15 show a state in which the original pressure plate is closed to press the original, and FIGS. 12, 14 and 17 show a state in which the original pressure plate is opened. It is a figure.

In this embodiment, the original pressure plate supporting member is released by opening and closing the original pressure plate.

The configuration of the entire apparatus in this embodiment is substantially the same as that described in the first embodiment, and the same parts are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 15, one side of the original pressure plate support member 24 is rotatably attached to the image reading device 3 as an original handling device, and the other is engaged with the groove 21A of the original pressure plate 21. There is.

Image reading device 3 for original pressure plate support member 24
A torsion coil spring 25 is provided on the side rotatably attached to the original pressure plate support member 24 in FIG.
It is biased in the direction of arrow A shown in FIG.

As shown in FIG. 15, the leading end portion 24a of the original document pressure-bonding support member 24 which is engaged with the groove 21A has a key-like shape, and the corresponding portion of the original document pressure-bonding plate 21 is shown in FIG. A groove 21A as shown by is formed. Groove 2
1A shows grooves 21a, 21 having different depths as shown in FIG.
b, 21c, 21d, 21e, and 21f, which become deeper on the stairs in the order of groove 21f <21a <21b <21c <21d, and groove 21e is groove 21d and groove 21
It is an inclined groove that connects a with no step.

The key-shaped tip portion 24a of the original pressure plate support member 24 is provided with a pressing member 26 provided on the original pressure plate 21.
The spring 27 always urges the groove 21A to bite into the groove 21A.

Therefore, the front end portion 24a of the original pressure plate support member 24 can move in the groove 21A in the directions of groove 21a → 21b → 21c → 21d and groove 21f → 21a, but cannot move in the opposite direction. Has become.

In the state where the original document pressure plate 21 is pressing the original document, the leading end portion 24a of the original document pressure plate support member 24 has the groove 21a.
When the original pressure plate 21 is located on the bottom of the document, it moves in the direction of arrow B shown in FIG. If the leading end 22a of the original pressure plate support member 22 enters the groove 21b and is further opened, the leading end 22a of the original pressure plate support member 22 slides in the direction of arrow C into the groove 21c which is the lock portion. The state shown in FIGS. 12, 14, and 17 is entered. When the user stops supporting the original pressure plate, the front end 24a of the original pressure plate support member 24 is held by the groove 21c, and the original pressure plate 21 is supported and opened. In FIG. 17, the pushing member 26 in FIG. 12 is shown by a two-dot broken line, and is shown by a solid line on the assumption that the groove 21A portion and the leading end portion 24a of the original pressure plate support member 24 are directly visible.

After the original document is set on the original table 9, the original document pressure plate 21 is released from the original pressure plate support member 24 for pressing the original document by lifting the original pressure plate 21 once in the opening direction. .

By the operation of lifting the original pressure plate 21 in the opening direction, first, the front end portion 2 of the original pressure plate support member 24 is moved.
4a is from the position of the state shown in FIG.
The groove 2c, which is a groove for releasing, is moved in the direction of the arrow D indicated by and is dug deeper than the groove 21c that is the lock portion.
It is dropped to 1d and the support is released.

Thereafter, by closing the original pressure plate 21, the tip end portion 24 of the original pressure plate support member 24 which is biased in the direction of arrow A shown in FIG. 14 by the torsion coil spring 25.
a is a groove 21e inclined from the groove 21d in the direction of arrow E.
To the shallowest groove 21f, and finally the original is dropped from this groove 21f to the original groove 21a to return to the original pressure-bonded state.

The supporting member for the original pressure plate and its releasing means are not limited to those in the above-mentioned embodiment, but any member may be used as long as the supporting member supports the original pressure plate and the releasing means releases the support. It goes without saying that any supporting member and releasing means may be used.

[0041]

As described above, by providing the supporting member for supporting the original pressure plate in the opened state and the releasing means for releasing the support of the supporting member to the original pressure plate, the large-sized document can be obtained. Even in the original pressing plate for pressing the original, the original pressing plate can be stopped in an open state without being affected by the weight or the position of the center of gravity without adjustment.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a configuration example of a document reading apparatus according to a first embodiment of the present invention.

FIG. 2 is an external perspective view showing a configuration example of a document reading apparatus according to the first embodiment of the present invention.

FIG. 3 is a top view showing a configuration example of a document reading apparatus according to the first embodiment of the present invention.

FIG. 4 is a side view showing a configuration example of an image recording apparatus according to the first embodiment of the present invention.

FIG. 5 is a side view showing a configuration example of the image recording apparatus according to the first embodiment of the present invention.

FIG. 6 is an external perspective view showing a configuration example of a document reading apparatus according to a second embodiment of the present invention.

FIG. 7 is an external perspective view showing a configuration example of a document reading apparatus according to a second embodiment of the present invention.

FIG. 8 is a top view of a main portion of a document pressure plate showing a configuration example of a document reading device according to a second embodiment of the invention.

FIG. 9 is an external perspective view showing a configuration example of a document reading apparatus according to a second embodiment of the present invention.

FIG. 10 is a side sectional view of a main portion showing a configuration example of an image recording apparatus according to a second embodiment of the present invention.

FIG. 11 is a main part perspective view showing a configuration example of a document reading apparatus according to a third embodiment of the invention.

FIG. 12 is a perspective view of a main part showing a configuration example of a document reading apparatus according to a third embodiment of the invention.

FIG. 13 is a side view of a main portion showing a configuration example of an image recording apparatus according to a third embodiment of the present invention.

FIG. 14 is a side view of a main portion showing a configuration example of an image recording apparatus according to a third embodiment of the present invention.

FIG. 15 is a cross-sectional top view of main parts showing a configuration example of a document reading apparatus according to a third embodiment of the invention.

FIG. 16 is a perspective view of a main part showing a configuration example of a document reading apparatus according to a third embodiment of the invention.

FIG. 17 is a perspective view of main parts showing a configuration example of a document reading device according to a third embodiment of the invention.

[Explanation of symbols]

 1, 11, 21 Original pressure plate 3 Image reading device 4, 14, 24 Original pressure plate support member 7, 17 Release lever 5 Lock member 19 Release cam

Claims (5)

[Claims] 1. A document crimping plate configured to be openable and closable between a crimping position for crimping a document placed on a document placing table and an opening position for opening the crimping of the document in an upward direction. A document handling apparatus including: a support member for supporting the document pressure plate in an open state; and a release means for releasing the support member from supporting the document pressure plate. Document handling device. 2. By selecting the position of the support member,
2. The document handling apparatus according to claim 1, wherein it is possible to select an open angle of the supported document pressure plate. 3. An original handling apparatus according to claim 1, wherein a releasing means is provided on the original pressing plate. 4. The document handling apparatus according to claim 3, wherein the releasing means is operated in conjunction with the operation of a lever provided on the document pressing plate. 5. The document handling apparatus according to claim 1, wherein the releasing means operates in conjunction with the opening / closing operation of the document pressure plate.