JP5893880B2 - Opening and closing device for document crimping plate in office automation equipment - Google Patents

Description

  The present invention relates to a document crimping plate opening / closing device in OA equipment equipped with means for reading an image of a document such as a copying machine, a facsimile machine, a scanner, etc., in particular, a heavy automatic document feeder (hereinafter referred to as an ADF device). .) Is provided on one side, and as a result, the present invention relates to an apparatus for opening and closing a document pressing plate whose center of gravity is offset.

  As a conventional document crimping plate opening / closing device in this type of OA equipment, a first switching device provided on the document crimping plate on the side close to the ADF device and a document crimping plate on the side remote from the ADF device are provided. A second opening / closing device, both of which are attached to the device body of the OA device, a support arm pivotally attached to the attachment member via a hinge shaft, The lift arm is pivotally attached to the front end portion via a support shaft so as to be able to rotate in a direction overlapping the support arm and to which the original cover is attached. (For example, see Patent Documents 1 and 2)

JP 2005-37954 A JP 2010-134230 A

In the conventional document pressure plate opening and closing device, not only the first opening and closing device but also the second opening and closing device are made of metal plates.
Since the first switchgear is close to a heavy ADF device and requires a high torque, it must be formed of a metal plate as in the past.
However, since the second opening / closing device is separated from the ADF device, the second opening / closing device is composed of a metal plate in the same manner as the first opening / closing device, although it may be a low-torque device with a small load. .
Therefore, in particular, the second switchgear has a problem that it is not only stronger and heavier than necessary, has a low degree of freedom in shape, but also has a high manufacturing and assembly cost.

The document crimping plate opening / closing device in the OA apparatus of the present invention is made in order to solve the problems of the above-mentioned conventional device, and is a metal first supporting the document crimping plate close to the center of gravity so as to be opened and closed. An opening and closing device and a second opening and closing device for opening and closing a document pressing plate on the side away from the center of gravity so as to be openable and closable. A base member attached and fixed to the base member, an arm member pivotally attached to the base member via a hinge rotation shaft, and a base end portion having a lift rotation shaft at the distal end portion of the arm member. A lift member pivotally attached to the arm member in a direction that overlaps the arm member, a first spring that urges the tip end of the arm member to elastically lift up, and the above Lift member is the arm And a second spring for urging so as to overlap the elastic, consists, the base member, at least one member of the arm member or the lifting member, characterized in that it is molded of a synthetic resin.

The document crimping plate opening / closing device in the OA apparatus according to the present invention has a small ADF device provided with the ADF device at the offset position because at least one member of the base member, the arm member or the lift member is formed of synthetic resin. It can be opened easily with the opening operation force, not only can the fall due to the moment in the closing direction of the ADF device be eased, but also it is light, has a high degree of freedom in shape, and has low manufacturing and assembly costs. Have.

1 is a perspective view of a main part showing an embodiment of a copying machine according to the present invention. It is the perspective view which looked at the 2nd opening / closing device of FIG. 1 from diagonally upward. It is the perspective view which looked at the 2nd opening / closing apparatus of FIG. 1 from diagonally forward downward. It is a disassembled perspective view of the 2nd switchgear of the state where the movable resin arm member stood | started up vertically. FIG. 2 is a perspective view of a state where a movable resin lift member is lifted up from the state of FIG. 1 (a state where a thick original is pressed). It is a side view which shows another Example of this invention. It is a decomposition | disassembly side sectional view which shows another Example of this invention. FIG. 7B is an exploded front view of the embodiment of FIG. 7A. It is a decomposition | disassembly side sectional view which shows another Example of this invention.

FIG. 1 shows an embodiment of a copying machine according to the present invention. Reference numeral 1 denotes a copying machine body, and 2 denotes a document pressure plate provided with an ADF device 2a. Reference numeral 3 denotes a first opening / closing device which is attached to the copying machine main body 1 and supports the side of the original cover 2 close to the ADF device 2a so as to be freely opened and closed. Reference numeral 4 denotes a second opening / closing device which is attached to the copying machine body 1 and supports the side of the original cover 2 away from the ADF device 2a so as to be freely opened and closed.

  2 and 3 are perspective views of the second opening / closing device 4 as seen from different directions. 4a is a resin base member, 4b is a resin arm member, 4c is a resin lift member, and 4d. Is a hinge rotation axis, 4e is a lift rotation axis, 4f is a first torsion spring, and 4g is a second torsion spring. The resin base member 4a, the resin arm member 4b, and the resin lift member 4c are all formed of a synthetic resin such as engineering plastic. Of the resin base member 4a, resin arm member 4b or resin lift member 4c, at least one member may be made of synthetic resin, and all members (4a, 4b, 4c) are made of synthetic resin. Need not be. The hinge rotating shaft 4d and the lift rotating shaft 4e are preferably made of metal, but may be made of resin as long as they do not interfere with strength. The first torsion spring 4f and the second torsion spring 4g are made of metal.

As shown in FIG. 3, the resin base member 4a is attached and fixed to the copying machine main body 1 by a fixing screw (not shown) through an attachment hole 4a '. (See FIG. 1) The hinge base shaft 4d is attached to the resin base member 4a.

  The base end portion of the resin arm member 4b is pivotally attached to the resin base member 4a via the hinge rotation shaft 4d. The first torsion spring 4f is externally attached to the hinge rotating shaft 4d, and one end thereof is elastically contacted with the resin base member 4a, and the other end is attached to the resin arm member 4b. The front end of the resin arm member 4b is elastically brought into contact with the elastic arm member 4b.

  The base end portion of the resin lift member 4c is pivotally attached to the tip end portion of the resin arm member 4b via the lift rotation shaft 4e. Accordingly, the resin lift member 4c is pivotally attached in a direction overlapping the resin arm member 4b. The lift torsion shaft 4e is fitted with the second torsion spring 4g. One end of the lift torsion spring 4g elastically contacts the resin arm member 4b, and the other end of the lift rotation shaft 4e is in contact with the resin lift member 4c. The resin lift member 4c is configured to elastically contact with the resin arm member 4b.

  Since the second opening / closing device 4 of the above embodiment is configured as described above, when the original press plate 2 presses a thin original, the resin lift member 4c is overlapped with the resin lift member 4c. The arm member 4b rotates around the hinge rotation shaft 4d with respect to the resin base member 4a. Further, when the original pressure plate 2 presses a thick original such as an encyclopedia, the resin fat lifting member 4c is lifted up by the resin arm member 4b as shown in FIG. It rotates about the lift rotation shaft 4e and becomes horizontal (parallel to the reading glass surface).

  Note that the first opening / closing device 3 is, for example, as disclosed in Patent Document 2 described above, an attachment member that is attached and fixed to the OA device main body, and the attachment member is rotatable via a hinge shaft. A support arm pivotally attached to the support arm, a lift arm pivotally attached to a distal end portion of the support arm via a support shaft in a direction overlapping the support arm, and a document pressure plate attached thereto, the lift arm and the above A compression spring that is interposed between the mounting member and biases the lift arm in a direction overlapping the support arm and simultaneously biases the lift arm in a direction to open the support arm.

  FIG. 6 shows another embodiment of the present invention. Instead of the second torsion spring 4g, a tension spring 5 is stretched between the resin arm member 4b and the resin lift member 4c. Thus, the same function as the second torsion spring 4g can be exhibited.

7A and 7B show another embodiment of the present invention. Instead of the long hinge rotating shaft 4d and the lift rotating shaft 4e, the resin arm member 4b on which they are positioned is shown. A hinge rotation shaft 8 and a lift rotation shaft 9 are projected outward from both ends of the shaft, and slopes 8 a and 9 a are formed on the tip surfaces of the hinge rotation shaft 8 and the lift rotation shaft 9. On the other hand, elastically bent shaft brackets 10 and 11 are formed in the bearing portions of the resin base member 4a and the resin fat lift member 4c, and the shaft holes 10a and 11 are formed in the shaft brackets 10 and 11, respectively. 11a is established. When the hinge rotation shaft 8 is rotatably fitted in the shaft hole 10a, the shaft bracket 10 is forcibly pushed in along the inclined surface 8a of the hinge rotation shaft 8 and stopped. Similarly, when the lift rotation shaft 9 is rotatably fitted in the shaft hole 11a, the shaft bracket 11 is forcibly pushed in the arrow direction along the inclined surface 9a of the lift rotation shaft 9 and stopped.

  FIG. 8 shows still another embodiment of the present invention, in which spring holding portions 6 and 7 are formed at both ends of the resin arm member 4b, respectively, and the first torsion spring 4f and the first torsion spring 4f are formed. The two torsion springs 4g are press-fitted as indicated by arrows and are held rotatably. At that time, if necessary, an opening 6a is formed in the spring holding portion 6, and the end portion of the first torsion spring 4f is inserted through the opening 6a.

DESCRIPTION OF SYMBOLS 1 Copier main body 2 Original crimping plate 2a ADF apparatus 3 1st opening / closing apparatus 4 2nd opening / closing apparatus 4a Resin base member 4b Resin arm member 4c Resin lift member 4d Hinge rotating shaft 4e Lift rotating shaft 4f First twist Spring 4g Second torsion spring 5 Tension spring 6 Spring holding portion 6a Opening 7 Spring holding portion 8 Hinge rotation shaft 8a Slope 9 Lift rotation shaft 9a Slope 10 Axis bracket 10a Axis hole 11 Axis bracket 11a Axis hole

Claims (5)

An OA device including a first metal opening / closing device that supports a document pressing plate on the side close to the center of gravity so that the document pressing plate can be opened and closed, and a second opening / closing device that supports the document pressing plate on the side far from the center of gravity so as to be opened and closed. In the document crimping plate opening / closing apparatus in the above, the second opening / closing apparatus is pivotally attached to the base member via a hinge rotation shaft, and a base member attached and fixed to the copying machine main body. An arm member, a lift end member pivotally attached to a distal end portion of the arm member via a lift rotation shaft, and pivotally attached in a direction overlapping the arm member, and the arm member A first spring that urges the tip of the arm to elastically lift, and a second spring that urges the lift member to elastically overlap the arm member, the base member, Arm member or the above Switchgear of the original cover in OA equipment at least one member of the bets member is characterized in that it is molded of a synthetic resin.   2. The document crimping plate opening / closing apparatus according to claim 1, wherein the first spring is a torsion spring.   3. The document crimping plate opening / closing device in OA equipment according to claim 1, wherein the second spring is a torsion spring or a tension spring.   A hinge rotation shaft and a lift rotation shaft project outwardly from both ends of the arm member, and an elastically bent shaft bracket is formed on the bearing portion of the base member and the lift member, respectively. 4. An original document pressure bonding in an OA apparatus according to claim 1, wherein a shaft hole is formed in each shaft bracket, and the hinge rotation shaft and the lift rotation shaft are rotatably fitted in the shaft hole, respectively. Board opening and closing device.   Spring holding portions are formed at both ends of the arm member, respectively, and the first torsion spring and the second torsion spring are press-fitted into these spring holding portions so as to be rotatably held. 5. A document crimping plate opening and closing device in an OA device according to claim 2, 3 or 4.