JP3963390B2 - Document crimping plate opening and closing device and office equipment - Google Patents

Description

  The present invention relates to a document crimping plate opening / closing device suitable for use in office equipment such as a copying machine, a printing machine, a facsimile machine, and a scanner, and an office device provided with the document crimping plate opening / closing device.

  A document crimping plate is attached to an apparatus main body of an office machine such as a copying machine, a printing machine, a facsimile machine, a scanner, or the like via a document crimping plate opening / closing device at the rear upper surface of the device body. The document crimping plate opening / closing device is a kind of hinge mechanism, and can support the document crimping plate on the contact glass surface on the upper surface of the apparatus body by pivotally supporting the document crimping plate so that it can be opened and closed around the hinge axis. The contact glass can be exposed. To set a document on the contact glass surface, rotate the document crimping plate upward (by moving the document crimping plate away from the contact glass (sometimes referred to as opening direction)). After exposing (opening) and placing the document on the surface of the contact glass, the document crimping plate is rotated in the opposite direction and closed, and the document is crimped onto the contact glass surface with the document crimping plate, An original can be set on the contact glass surface.

Among such document pressing plate opening / closing devices, there is known a document pressing plate opening / closing device capable of rotating the document pressing plate upward without feeling the original weight by the biasing force of the elastic means ( For example, see Patent Document 1.) The document crimping plate opening and closing device is provided between an attachment member attached to the apparatus main body, a support member rotatably connected to the attachment member via a hinge pin, and the attachment member and the support member. Elastic means for biasing the plate upward. The elastic means includes a compression coil spring elastically provided between an operating member attached to the support member side and a pressure receiving member attached to the attachment member side, and a cam slider is provided between the compression coil spring and the pressure receiving member. Intervening.
JP-A-11-95339

  By the way, in the known document crimping plate opening / closing device described above, an elastic means for biasing the document crimping plate in the opening direction is provided, and the original crimping plate is not felt by the biasing force of the elastic means. However, since the cam slider protrudes from the support member due to the urging force of the compression coil spring during assembly, this cam slider connects both side plates of the support member to the side plates of the mounting member. Since the hinge pin mounting hole is closed, there is a problem that it is difficult to assemble the both side plates of the support member to the connection holes of the side plates of the mounting member via the hinge pins.

That is, when assembling the document pressing plate opening / closing apparatus described above, it is necessary to incorporate the elastic means together with the cam slider when the support member is connected to the attachment member via the hinge pin. At this time, since the elastic means abuts one end portion of the support member on the operating member on the free end side of the support member via the spring receiving member, the cam slider is pushed by the elastic means and allows the hinge pin of the support member to pass therethrough. The mounting hole will be blocked. In other words, the hinge pin mounting hole of the support member incorporating this elastic means and the bearing hole of the bearing member attached to the connecting hole through which the hinge pin of the mounting member is inserted are aligned, and the hinge pin is inserted into each of the holes aligned. Thus, the support member is rotatably connected to the mounting member. At this time, if the cam slider is pushed and protrudes toward the hinge pin by the elastic force of the elastic means, the cam slider resists the elastic force of the elastic means so that the cam slider does not block the hinge pin mounting hole. Then, the bearing member is attached to the connection hole while being pushed in, and further, the washer is interposed, and the insertion connection by the hinge pin must be performed. Therefore, there is a problem that it is difficult to connect the support member to the attachment member. .

  In addition, when the document crimping plate opening / closing device is set in the main body of the apparatus, the elasticity of the elastic means starts to win when the document crimping plate is opened more than a predetermined angle. There is a problem of giving an impact to the main body of the apparatus. In particular, when the office machine is a copying machine and an automatic document feeder is installed on the original pressure plate, the original pressure plate also becomes a considerable weight. Therefore, there is a problem that the apparatus main body is impacted and there is a possibility that the automatic document feeder may be affected.

The present invention has been made to solve the above-described problems, and a first object of the present invention is to provide a document crimping plate opening / closing device capable of improving assembly workability.
A second object of the present invention is to provide a document crimping plate opening / closing device devised so that the document crimping plate does not jump suddenly from a predetermined opening angle even if elastic means is used.
Furthermore, a third object of the present invention is to provide an office machine provided with a document crimping plate opening / closing device that achieves the above object.

In order to achieve the above-mentioned object, a document crimping plate opening / closing apparatus according to the present invention includes a mounting member having a connection hole on both side plates to be attached to an apparatus main body of an office device, and a support member having a connection hole on both side plates. A first hinge pin that is inserted into the connection hole of the support member and the connection hole of the attachment member and rotatably connects the support member and the attachment member; and free end portions of both side plates of the support member And a lift member attached to the original pressure plate, and a pressure receiving member attached to both side plates of the attachment member at a position different from the first hinge pin. When the the actuating member mounted in a position different from the second hinge pin between both side plates of the lift member, resiliently by resilient means between said pressure receiving member and the operation member is inserted into the support the member When A document cover closer having a cam slider interposed between the resilient means and the pressure receiving member, the original cover than the connecting hole of the support member to the both side plates of the support member After the cam slider is pushed into the support member against the elastic force of the elastic means at the time of assembly in which a stopper hole is provided on the side and the support member is connected to the mounting member by the first hinge pin. By inserting a stopper pin into the stopper hole, the cam slider is temporarily prevented from returning, and the connection of the support member and the mounting member with the first hinge pin through the connection holes is facilitated. It is characterized by .

  According to this invention, the stopper holes for inserting the stopper pins for pushing the cam slider into the support member against the elasticity of the elastic means and stopping at that position are provided in the both side plates of the support member. At this time, a stopper pin can be inserted into the stopper hole to prevent the cam slider from moving and to prevent the connecting hole of the support member from being blocked by the cam slider. As a result, the connecting hole of the support member and the connecting hole of the mounting member can be easily aligned, and the first hinge pin can be easily inserted into each of the combined connecting holes, thereby improving the assemblability.

In the document crimping plate opening and closing apparatus according to the present invention, it is preferable that the pressure receiving member is a cam member attached to both side plates of the attachment member. Also, in the document crimping plate opening and closing device according to the present invention, the elastic means is a compression coil spring, and a damper device that operates below a predetermined rotation angle of the support member is provided in the compression coil spring. preferable. Further, in the document crimping plate opening and closing device according to the present invention, a cylindrical spring receiving member is covered on the side of the compression coil spring that is in pressure contact with the operating member, and the spring receiving member and the cam slider are It is preferable that it is inserted together with the compression coil spring into a housing part constituted by the top plate, the side plates and the holding plate of the support member. In the document crimping plate opening / closing apparatus according to the present invention, it is preferable that the elastic means is composed of a plurality of compression coil springs.

Further, in the document crimping plate opening and closing apparatus according to the present invention, the cam slider abuts on the first hinge pin at a predetermined rotation angle or more of the support member, and at a rotation angle larger than the predetermined rotation angle, It is preferable to configure so as not to contact the pressure receiving member . According to the present invention, when the original cover is opened more than a predetermined rotation angle, the cam slider does not contact the pressure receiving member after contacting the first hinge pin. Since the elasticity of the means does not act, it is possible to prevent the original cover from abruptly jumping up.

  In order to achieve the above object, an office machine according to the present invention includes the document crimping plate opening / closing device according to the present invention. According to this invention, as described above, during assembly, the stopper pin is inserted into the stopper hole to prevent the cam slider from moving, and the cam slider can prevent the hinge pin mounting hole of the support member from being blocked. Easy alignment of the hinge pin mounting hole of the support member and the bearing hole of the bearing member mounted in the connecting hole of the mounting member, and the insertion of the first hinge pin through the washer to each hinge pin mounting hole and bearing hole aligned with each other As a result, assembly workability is improved.

  As described above, according to the document crimping plate opening / closing device and the office equipment according to the present invention, at the time of assembly, the stopper pin is inserted into the stopper hole to prevent the movement of the cam slider, and the hinge pin mounting hole of the support member by the cam slider Blockage between the hinge pin mounting hole of the support member and the bearing hole of the bearing member attached to the connecting hole of the mounting member, and the first through the washer to each of the holes. One hinge pin can be easily inserted, and the assembly workability can be improved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a document crimping plate opening / closing device according to the present invention will be described in detail with reference to the accompanying drawings.
1 to 8 are views showing an example of a document crimping plate opening / closing device according to the present invention. As shown in FIGS. 1 to 8, the document crimping plate opening / closing apparatus according to the present invention is configured to attach a document crimping plate 3 to the rear end portion of an apparatus main body 2 of an office device so as to be opened and closed. The office equipment is not particularly limited, and examples thereof include a copying machine, a printing machine, a facsimile machine, a scanner, and the like, and a copying machine is particularly preferable.

The document crimping plate opening / closing device 1 according to the present invention is attached to an apparatus main body 2 of an office machine. , 17, the hinge pin attachment holes 17, 17 of the support member 5, and the bearing holes 45, 45 of the bearing members 44, 44 attached to the connection holes 16, 16 of the attachment member 4. The first hinge pin 11 is inserted via 46 and rotatably connects the support member 5 and the mounting member 4, and the second hinge pins 12 are provided on the free end sides of the side plates 52, 52 of the support member 5. The lift member 6 is attached to the original pressure plate 3 and is attached to the side plates 42 and 42 of the attachment member 4 at positions different from the first hinge pin 11. It was received A member 13, the bullet between the actuating member 14 attached at a position different from the second hinge pin 12 to the side plates 62, 62 of the lift member 6 is inserted into the support member 5 and the pressure receiving member 13 and the actuating member 14 And provided with elastic means 7 and a cam slider 72 interposed between the elastic means 7 and the pressure receiving member 13, and the support member 5 is attached to both side plates 52, 52 of the support member 5. When connecting with the first hinge pin 11, stopper holes 9 and 9 are provided for inserting a stopper pin 10 for pushing the cam slider 72 into the support member 5 against the elastic force of the elastic means 7 and stopping at that position. It is characterized by that.

  The attachment member 4 includes a bottom plate 41 attached to the device main body 2, both side plates 42 and 42 extending from both side end portions of the bottom plate 41 in a direction orthogonal to the bottom plate 41 (including a direction substantially orthogonal), and a bottom plate A substantially rectangular rear plate 43 extending from one end portion (rear end portion) of 41 in a direction orthogonal to the bottom plate 41 (including a substantially orthogonal direction).

The bottom plate 41 is formed in a substantially rectangular shape and is attached to the device main body 2 with screws or the like. The side plate 42 is formed in a substantially L shape, and the connecting holes 16 through which the first hinge pins 11 are inserted into both side plates 42 and 42 extending in a direction orthogonal to the bottom plate 41 (including a direction substantially orthogonal). 16 is provided. The connection holes 16 and 16 are configured such that rotation is restricted and bearing members 44 and 44 are attached, and washers 46 and 46 are interposed between both side plates 52 and 52 of the support member 5. Pressure receiving member mounting holes 47 and 47 are provided at positions that are biased toward the bottom plate 41 side (downward) and inward (frontward) from the connection holes 16 and 16. The pressure receiving member 13 is inserted into the pressure receiving member mounting holes 47 and 47 and fixed by means such as caulking. The pressure receiving member 13 is a pressure receiving member with which the outer surface of the bottom portion of the cam slider abuts. The pressure receiving member is not limited to a pin such as the pressure receiving member 13, but may be a pressure receiving roller, for example.

  The support member 5 includes an upper plate 51 which is a top plate, and both side plates 52 and 52 extending from both side end portions of the upper plate 51 in a direction orthogonal to the upper plate 51 (including a direction substantially orthogonal), The holding plate 53 is formed by bending the front end portions of the side plates 52, 52 by 90 ° to the sides facing each other. The upper plate 51, the side plates 52 and 52, and the holding plate 53 constitute a housing portion 58.

  In the vicinity of the rear end portion of the upper plate 61 of the lift member 6, a horizontal position adjusting means 59 for adjusting the horizontal position of the original cover 3 is preferably provided. The horizontal position adjusting means 59 includes, for example, an adjusting screw 59a and a fastening nut 59b provided in the vicinity of the rear end portion of the upper plate 61 and in the central portion (including the substantially central portion) in the width direction. A fastening nut 59b is fixed to the upper plate 61, and an adjustment screw 59a is screwed to the fastening nut 59b. A tip of the adjustment screw 59a abuts on the upper plate 51 of the support member 5, and the adjustment screw 59a is adjusted. The horizontal position of the original cover 3 is adjusted by adjusting the distance between the support member 5 and the lift member 6.

A second hinge pin hole 57 through which the second hinge pin 12 is inserted is provided at one end portion (rear end portion) of the both side plates 52, 52 of the support member 5, and a notch portion 54 into which an operation member 14 described later enters. Is provided. A hinge pin mounting hole 17 is provided at the other end (front end) of the side plates 52, 52. The hinge pin mounting holes 17 of the side plates 52, 52 and the connecting holes 16 of the mounting member 4 are aligned, and the first hinge pin 11 is inserted into each of the holes 17, 16 so that the support member 5 is attached to the mounting member 4. The first hinge pin 11 is pivotally connected around the axis.

The lift member 6 is used for stably pressing a thick document on the upper surface of the apparatus main body 2. The lift member 6 includes an upper plate 61 that is attached to the rear end side of the document pressing plate 3 with screws or the like, and directions that are orthogonal to the upper plate 61 from both ends of the upper plate 61 (a direction that is substantially orthogonal). ) And both side plates 62 are formed in a substantially U shape so as to cover the support member 5. A second hinge pin insertion hole (not shown) is provided at a position closer to the upper plate 61 than the center of one end (rear end) of the lift member 6, and on the other end side from the second hinge pin insertion hole. In addition, an operating member hole (not shown) through which the operating member 14 is inserted is provided at a position opposite to the upper plate 61 side from the center. The operating member 14 is inserted into and fixed to the operating member holes of the side plates 62 and 62. The second hinge pin insertion holes 67 of the side plates 62, 62 of the lift member 6 and the second hinge pin holes 57 of the side plates 52, 52 of the support member 5 are aligned with each other, and the second hinge pins 12 are inserted into these holes 67, 57, respectively. By being inserted, the lift member 6 and the support member 5 are connected to each other so as to be rotatable about the second hinge pin 12.

  The elastic means 7 urges the document crimping plate 3 to rotate in the opening direction, urges the lift member 6 in a direction overlapping the support member 5, and when the document crimping plate 3 has a predetermined opening angle or less. The elasticity for urging the original cover 3 is smaller than the moment of the original cover 3. In the present invention, the opening direction refers to a direction in which the original cover 3 is separated from the contact glass 20 when the original cover 3 is rotated. The opening angle in the present invention is an angle of the original cover 3 with respect to the surface of the contact glass 20 that is the upper surface of the device body 2. The predetermined opening angle in the present invention is an angle at which the urging force for urging the original cover 3 by the elastic means 7 is smaller than the moment of the original cover 3.

The elastic means 7 is a compression coil spring 73, for example. The compression coil spring 73 is inserted into the support member 5 and elastically provided between the operation member 14 and the pressure receiving member 13. A spring receiving member 71 is provided between the compression coil spring 73 and the operating member 14, and a cam slider 72 is provided between the compression coil spring 73 and the pressure receiving member 13.

  The number of the compression coil springs 73 is not particularly limited, and may be one or more, and biases the spring receiving member 71 and the cam slider 72 in directions away from each other. The compression coil spring 73 urges the document crimping plate 3 in the opening direction, and when the document crimping plate 3 is below a predetermined opening angle (for example, 20 ° (including around 20 °)). The elastic force for urging the plate 3 is smaller than the moment of the original cover 3.

  The spring receiving member 71 and the cam slider 72 are formed in a bottomed cylindrical shape having a rectangular cross section. The spring receiving member 71 and the cam slider 72 are individually slidably fitted into the accommodating portion 58 of the support member 5 with the opening portions facing each other and the compression coil spring 73 accommodated therebetween. Has been inserted. When the bottom plate 41 of the mounting member 4 and the support member 5 (upper plate 51) are substantially parallel to each other, the spring receiving member 71 and the cam slider 72 (for example, the original pressure plate 3 on the contact glass 20 on the upper surface of the device body 2). Is formed in such a length as to be fitted in the accommodating portion 58 of the support member 5 (when the original cover is in the closed position).

The operating member 14 is in contact with the outer surface of the closing surface 71 a of the spring receiving member 71, and the supporting member 5 and the lift member 6 are overlapped by pressing the operating member 14 by the elasticity of the compression coil spring 73. ing. That is, the tip of the adjustment screw 59a comes into contact with the upper plate 51 of the support member 5 by the elasticity of the compression coil spring 73, and the upper plate 51 of the support member 5 and the upper plate 61 of the lift member 6 are substantially parallel and close to each other. It is supposed to be.

  A protrusion 72 a is provided at a substantially central portion of the outer surface of the bottom portion (sometimes referred to as a closed portion) of the cam slider 72. The protrusion 72 a is formed to extend substantially parallel to the upper plate 51 of the support member 5. The bottom outer surface of the cam slider 72 on the upper plate 51 side from the protrusion 72a is formed as a pin abutting portion 72f with which the stopper pin 10 abuts when the stopper pin 10 is inserted into the stopper hole 9. Yes. The outer surface of the bottom of the cam slider 72 on the holding plate 53 side of the protrusion 72a is formed as an inclined portion 72b that is gradually inclined. A protrusion 72a and an inclined portion 72b on the outer surface of the bottom portion of the cam slider 72 are formed as one kind of cam.

That is, when the original pressing plate 3 (see FIG. 6) in the closed position is opened and closed around the first hinge pin 11 in a direction (upward) away from the contact glass 20, the portion that contacts the pressure receiving member 13 is a protrusion. The cam slider 72 is slid gradually from the 72a to the inclined portion 72b, and the compression coil spring 73 is pressed and slid by the compression coil spring 73 toward the rear end side, so that the compression coil spring 73 is gradually extended. When the original pressing plate 3 reaches a maximum use opening angle (for example, 60 ° (including around 60 °) to 70 ° (including around 70 °)) (see FIG. 7), the opening and closing thereof is the original pressing. It is regulated by a plate opening / closing regulation mechanism (not shown). 6-8, the code | symbol 72c shows an extension piece, and the holding plate 53 is located between this extension piece 72c and the wall part which forms the cam slider 72. As shown in FIG. .

  A damper device 8 may be provided in the compression coil spring 73. The damper device 8 is used only when the original pressure plate 3 is rotated in the closing direction, at a specific angle equal to or smaller than the opening angle that is a predetermined rotation angle of the original pressure plate 3 (for example, about 10 ° or less). It operates so as to reduce the rotation speed of the original cover 3. In the present invention, the closing direction refers to the direction in which the original cover 3 approaches the contact glass 20 when the original cover 3 is rotated. The specific angle or less in the present invention is not particularly limited as long as the angle is equal to or less than the predetermined opening angle.

  The damper device 8 is, for example, an oil damper device. The damper device 8 is not particularly limited as long as it can reduce the opening / closing speed of the original cover 3 only below a specific angle of the original cover 3 (for example, about 10 ° or less). The damper device 8 is, for example, a cylinder 81 filled with oil such as silicon oil, and is provided so as to be movable in the cylinder 81, and is connected to the piston rod 83 and exposed from the cylinder 81 of the piston rod 83. It is mainly composed of a piston (not shown) biased so that the exposed length is longer.

The stopper hole 9 is provided in order to prevent the cam slider 72 from closing the hinge pin mounting hole 17 by the elasticity of the compression coil spring 73, and is used particularly effectively during assembly. The position of the stopper hole 9 is not particularly limited as long as it is between the free end portion of the support member 5 and the hinge pin mounting hole 17, but the hole alignment between the connection hole 16 of the mounting member 4 and the hinge pin mounting hole 17 of the support member 5 is not limited. There is no particular limitation as long as the end surface of the cam slider 72 is in contact with the pressure receiving member 13 and does not get in the way. That is, by inserting, for example, a stopper pin 10 as a stopper member into the stopper hole 9 and bringing the cam slider 72 into contact with the stopper pin 10, the cam slider 72 can be prevented from closing the hinge pin mounting hole 17. it can. As a result, the hole alignment of the hinge pin mounting holes 17 and 17 of the support member 5 and the bearing holes 45 and 45 of the bearing members 44 and 44 mounted in the connection holes 16 and 16 of the mounting member 4 and the interposition work of the washers 46 and 46, Further, the insertion operation of the first hinge pin 11 becomes easy, and the assembly workability is improved. At this time, the pressure receiving member 13 may be fixed in advance between the both side plates 42 and 42 of the mounting member 4, or may be mounted after being connected by the first hinge pin 11.

This improvement in assemblability will be described in detail with reference to FIGS. In order to assemble the original cover 1 according to the present invention, as shown in FIG. 1, first, the second hinge pin insertion hole and the support member of the lift member 6 in which the operation member 14 is inserted and fixed in the operation member hole. 5 to the second hinge pin hole 57. The second hinge pin 12 is inserted through the hole, and the lift member 6 and the support member 5 are connected to each other so as to be rotatable about the second hinge pin 12. Of course, this assembly work may be reversed.

Next, in a state where the spring receiving member 71 to which the damper device 8 is attached from the base end portion (end portion on the hinge pin attachment hole 17 side) side of the support member 5 is covered with the cam slider 72 on each compression coil spring 73, It inserts in the accommodating part 58 of the supporting member 5. FIG. Then, the spring receiving member 71 comes into contact with the operating member 14, and the cam slider 72 is in a state of closing the hinge pin mounting hole 17 of the support member 5 as shown in FIG. When the end face of the cam slider 72 passes through the stopper hole 9 by pushing against the elasticity of the compression coil spring 73 using a jig, when the stopper pin 10 is inserted into the stopper hole 9 as shown in FIG. The cam slider 72 comes into contact with the stopper pin 10 and is stopped at that position. As a result, there is no need to block the hinge pin mounting hole 17, so that the bearing members 44, 44 are attached to the connection holes 16, 16 of the mounting member 4, the bearing holes 45, 45 of the bearing members 44, 44 and the support member 5. Alignment with the hinge pin mounting holes 17, 17 and the interposition of the washers 46, 46 are facilitated, and the first hinge pin 11 is passed through the hinge pin mounting holes 17, 17 and the bearing holes 45, 45 to the mounting member 4. The support member 5 is connected. Note that the pressure receiving member 13 is fixed in a fixed manner between the side plates 42 and 42 of the mounting member 4 in advance. Next, when the stopper pin 10 is pulled out, the cam slider 72 comes into contact with the pressure receiving member 13 to complete the assembly. FIG. 5 and FIG. 7 show this state.

  In particular, when the document pressing plate 3 is provided with an automatic document feeder, since the weight of the document pressing plate 3 increases, a compression coil spring 73 having a stronger biasing force is used. A large force is required to press down, and it is difficult to perform hole alignment and insertion work of the first hinge pin 11. On the other hand, in the present invention, since the cam slider 72 abuts against the stopper pin 10 and the hinge pin mounting hole 17 is always opened, the hinge pin mounting holes 17 and 17 and the bearing holes of the bearing members 44 and 44 are used. The hole alignment with 45 and 45 and the insertion operation of the first hinge pin 11 through the washer 46 and 46 can be easily performed. As a result, the support member 5 can be easily attached to the attachment member 4 and the assembly workability is improved.

Further, according to the present invention, the cam slider 72 is configured such that, for example, the pin contact portion 72f is greater than or equal to a predetermined rotation angle (sometimes referred to as a first rotation angle) of the document crimping plate 3 or the support member 5. 11 and is formed so that the pressure receiving member 13 does not contact at an angle larger than the first rotation angle. In the present invention, the first rotation angle is an angle smaller than a maximum opening angle of 90 ° by a predetermined angle, for example, an angle smaller than about 25 ° to about 35 ° (predetermined opening angle) from the maximum opening angle. ). As a result, when the document pressing plate 3 exceeds the first rotation angle, the cam slider 72 comes into contact with the first hinge pin 11, and then the cam slider 72 is separated from the pressure receiving member 13 and elastically moves to the document pressing plate 3. The elasticity of the means 7 does not act.

  That is, the original cover 3 is in close contact with the contact glass 20 of the device body 2 as shown in FIG. 6 when the device body 2 is not used. In order to place a document on the surface of the contact glass 20, first, a gripping portion provided at an end of the document crimping plate 3 on the side opposite to the portion where the lift member 6 is attached or the vicinity thereof is provided. Hold the document crimping plate 3 upward. That is, the original pressing plate 3 is rotated only about the first hinge pin 11 to expose the surface of the contact glass 20 to the outside. Thus, when the original cover 3 is rotated, the original cover 3 is urged to rotate in the opening direction by the elasticity of the compression coil spring 73, and thus rotates in the opening direction without feeling weight. .

At this time, as shown in FIG. 7, when the document pressing plate 3 reaches the first rotation angle, the cam slider 72 comes into contact with the first hinge pin 11, and then the cam slider 72 moves away from the pressure receiving member 13. (For example, refer to FIG. 8.) Since the elastic force of the compression coil spring 73 to the original pressure plate 3 is released and the rotation speed of the original pressure plate 3 is slowed and stopped, the original pressure plate 3 may jump up suddenly. Is prevented. As a result, office equipment such as a copying machine does not break down due to an impact when the original cover 3 is stopped. Even if the document pressing plate opening / closing device 1 is provided with an automatic document feeding device, the automatic document feeding device will not break down or the document pressing plate or the like will be damaged by an impact at the time of stopping.

  After placing the original on the exposed surface of the contact glass 20, the raised original cover 3 is lowered. That is, the original cover 3 is rotated in the closing direction. Then, the original cover 3 rotates about the first hinge pin 11 in the direction in which it contacts the contact glass 20 (moves downward). At this time, the tip of the adjustment screw 59a is in contact with the upper plate 61 of the lift member 6 due to the elasticity of the compression coil spring 73, that is, the original cover 3 (lift member 6) is centered on the second hinge pin 12. The original cover 3 rotates downward only about the first hinge pin 11 without rotating.

  Thus, when the original cover 3 is rotated in the closing direction, a little force is initially required to resist the biasing force of the compression coil spring 73. For example, the opening angle of the original cover 3 is If the angle is less than 20 ° (including around 20 °), the weight of the original pressure plate 3 becomes stronger than the urging force of the compression coil spring 73, so that the original pressure plate 3 rotates so as to fall. When the opening angle of the original cover 3 becomes a specific angle, for example, 10 ° (including around 10 °), the tip of the piston rod 83 of the damper device 8 comes into contact with the inner surface 72d of the bottom of the cam slider 72, and the piston rod 83 moves into the cylinder 81, the exposed length of the piston rod 83 is shortened, and the rotation speed of the original cover 3 is reduced. As a result, the rotation speed of the document crimping plate 3 is controlled by the damper device 8, so that the document crimping plate 3 does not collide with the contact glass 20 vigorously.

Next, when the original is removed from the contact glass 20 and the original pressing plate 3 is returned to the original position, in the illustrated example, the operating member 14 attached to the lift member 6 that opens and closes in the clockwise direction is the outer surface of the spring receiving member 71. Therefore, it is easy to open and close in the clockwise direction, and the original cover 3 can easily return to the original position, thereby improving its operability.

  Therefore, the document crimping plate opening / closing device 1 according to the present invention improves the assembly workability, prevents the document crimping plate 3 from jumping rapidly, and easily returns the inverted document crimping plate 3 to its original position. be able to.

  In the above embodiment of the present invention, the damper device 8 is used. However, the present invention can be applied as it is to a document crimping plate opening / closing device that does not use the damper device 8.

  As described above, the document crimping plate opening / closing apparatus according to the present invention uses a cam slider in which an elastic means is used, and the bearing member is attached to the hinge pin attachment hole of the support member and the connection hole of the attachment member at the time of assembly. This makes it easy to assemble the hole with the bearing hole and to insert the first hinge pin, so that the assembly can be easily performed. In addition, when the original pressure plate is opened, the original pressure plate is crushed and impacts the copying machine or the automatic document feeder. Since it can be prevented from being applied, it is particularly suitably used as a document crimping plate opening / closing device for office machines such as copying machines, printing machines, facsimile machines, and scanners.

It is a perspective view which shows an example of the assembly of the original document crimping plate opening / closing apparatus concerning this invention. It is a perspective view which shows an example of the assembly of the original document crimping plate opening / closing apparatus concerning this invention. It is a perspective view which shows an example of the assembly of the original document crimping plate opening / closing apparatus concerning this invention. It is a perspective view which shows an example of the assembly of the original document crimping plate opening / closing apparatus concerning this invention. It is a perspective view which shows an example of the assembly of the original document crimping plate opening / closing apparatus concerning this invention. FIG. 3 is a side sectional view showing an example of a document crimping plate opening and closing device according to the present invention and showing a state in which the document crimping plate is closed. FIG. 5 is a side sectional view showing an example of the document crimping plate opening and closing device according to the present invention and showing a state when the document crimping plate is at a predetermined rotation angle. FIG. 4 is a side sectional view showing an example of the document crimping plate opening and closing device according to the present invention and showing a state when the document crimping plate is at a maximum open position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Document pressing plate opening / closing device 2 Apparatus main body 3 Document pressing plate 4 Mounting member 5 Support member 6 Lifting member 7 Elastic means 8 Damper device 9 Stopper hole 10 Stopper pin 11 First hinge pin 12 Second hinge pin 13 Pressure receiving member 14 Actuating member 16 Connection Hole 17 Hinge pin mounting hole 71 Spring receiving member 72 Cam slider 73 Compression coil spring

Claims (7)

An attachment member having connection holes on both side plates to be attached to the device main body of the office equipment, a support member having connection holes on both side plates, and inserted into the connection holes of the support members and the connection holes of the attachment members. A first hinge pin that rotatably connects the support member and the mounting member; and both side plates that are rotatably connected to the free end portions of both side plates of the support member via a second hinge pin. a lifting member which is attached to the original cover, a pressure receiving member attached to a position different from the first hinge pin on each side plate of said mounting member, in a position different from the second hinge pin between both side plates of the lift member Installation and operation member, wherein the pressure receiving member is inserted inside the support member and the resilient means being resiliently between said actuating member, a cam slider interposed between the resilient means and the pressure-receiving member , An original cover closer having a
A stopper hole is provided on both side plates of the support member so as to be positioned closer to the original pressure plate side than the connection hole of the support member, and the cam is assembled when the support member is connected to the mounting member by the first hinge pin. After the slider is pushed into the support member against the elasticity of the elastic means, a stopper pin is inserted into the stopper hole to temporarily prevent the cam slider from returning, and the support member and the mounting member A document crimping plate opening and closing device , wherein the first hinge pin is easily connected to each other through the connection holes . The original pressure plate opening and closing device according to claim 1, wherein the pressure receiving member is a cam member attached to both side plates of the attachment member.   The said elastic means is a compression coil spring, The damper apparatus which operate | moves below a predetermined rotation angle of the said supporting member in this compression coil spring was provided, The characterized by the above-mentioned. Document crimping plate opening and closing device. A side of the compression coil spring that is in pressure contact with the operating member is covered with a cylindrical spring receiving member, and the spring receiving member and the cam slider are held between the top plate of the support member and the side plates. 4. The document crimping plate opening and closing device according to claim 3, wherein the pressing portion is inserted together with the compression coil spring into a receiving portion constituted by a plate.   The document crimping plate opening and closing device according to any one of claims 1 to 4, wherein the elastic means includes a plurality of compression coil springs. The cam slider is configured to contact the first hinge pin at a predetermined rotation angle or more of the support member and not to contact the pressure receiving member at a rotation angle larger than the predetermined rotation angle. The document crimping plate opening and closing device according to any one of claims 1 to 5, wherein   An office machine comprising the document crimping plate opening and closing device according to any one of claims 1 to 6.

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