JP4898216B2 - 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. The document crimping plate is pivotally supported around a hinge axis so that the document crimping plate can be crimped onto the contact glass on the upper surface of the apparatus body. The contact glass can be exposed. In order to set the document on the contact glass, the contact glass is exposed by rotating the document crimping plate upward (moving the document crimping plate away from the contact glass (sometimes referred to as opening direction)). After the original is placed on the contact glass, the original cover is rotated and closed in the opposite direction, and the original is set on the contact glass by pressing the original cover onto the contact glass. can do.

In such a document pressure plate opening / closing device, a lift member is provided so that the document can be brought into close contact with the contact glass regardless of the thickness, and the original weight is not felt by the biasing force of the elastic means. A document crimping plate opening / closing device capable of rotating the crimping plate is known (for example, see Patent Document 1).
JP-A-11-95339

  The document crimping plate opening / closing device described in Patent Document 1 allows a document placed on the contact glass on the apparatus body side to be in close contact with the contact glass regardless of the thickness, and the height of the document crimping plate can be increased. Horizontal position adjusting means for adjusting and leveling the original cover is provided.

  By the way, as a document pressing plate, a plate equipped with an automatic document feeder is known in order to efficiently copy, print, and transmit a plurality of documents. In this automatic document feeder, when a document is set on the document feeder provided on the upper side of the document crimping plate, the document can be automatically sent to the document reader of the device body for copying, printing, or transmission. Especially, it is convenient for copying, printing, or transmitting a plurality of originals. However, if the document is not sent in parallel to the document reading unit from the document feeding unit, the document is read in a bent manner, and accurate copying, printing, and transmission cannot be performed. For this reason, the height of the document crimping plate is adjusted by the horizontal position adjusting means so that the document crimping plate becomes horizontal at the time of installation. It was inconvenient because only specialists such as manufacturers could do it during maintenance.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a document crimping plate opening / closing device that automatically adjusts the height of the document crimping plate, and an office provided with the document crimping plate opening / closing device. To provide equipment.

In order to achieve the above-mentioned object, a document crimping plate opening / closing apparatus according to the present invention includes an attachment member attached to an apparatus main body of an office device, and a support pivotally supported by the attachment member via a first hinge pin. A member, a lift member that overlaps with the support member and is pivotally supported by a free end of the support member via a second hinge pin and attached to the original cover, and each slides into the support member. A slider and a spring receiving member, which are held movably and are provided with a pressure receiving pin provided on the mounting member and an operating pin provided on the lift member, each having one end in contact with each other, and between the slider and the spring receiving member Elastic means provided in a resilient manner, and by means of this elastic means, the original pressure plate is urged to rotate in the opening direction via the spring receiving member, and the lift member is overlapped with the support member. Is rotationally biased in a direction, the original cover in the original cover closer to form a closed state covering the upper surface of the apparatus main body by rotating in the original cover and the open state to expose the upper surface The original pressure plate is rotated in the closing direction to act on the spring receiving member immediately before or when the closing state is reached, and the urging of the lift member by the elastic means is released. And an urging release means for bringing the original pressing plate into close contact with the upper surface of the apparatus main body in a state where the urging force by the elastic means does not act.

  According to the present invention, when the original pressing plate is rotated in the closing direction, the biasing to the lift member by the elastic means is released immediately before or when the closing state is reached by the biasing releasing means. Since the plate is in a state in which the urging force by the elastic means does not act, the position of the original cover is automatically adjusted, and the original cover can be brought into close contact with the upper surface of the apparatus main body.

In the original cover closer according to the present invention, the pre-Symbol urging release means, biasing release member provided on said mounting member, in contact with the biasing release member provided on the spring receiving member, wherein It is preferable to configure with a cam portion that restricts the sliding movement of the spring receiving member. The bias release member is preferably a bias release roller. Further, in the document crimping plate opening and closing device according to the present invention, a predetermined closing angle of the document crimping plate is provided between the attachment member and the support member and the document crimping plate rotates in the closing direction. It is preferable to provide a damper device that operates only in the following and reduces the rotation speed of the original cover.

  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 the present invention, as described above, when the original pressing plate is rotated in the closing direction, the biasing to the lift member by the elastic means is released immediately before or when the closing state is reached by the biasing releasing means. Since the urging force by the elastic means is not applied to the original cover, the position of the original cover can be automatically adjusted so that the original cover is brought into close contact with the upper surface of the apparatus body.

  As described above, according to the document crimping plate opening and closing device and the office equipment according to the present invention, the document crimping plate is rotated in the closing direction and immediately before or when the closed state is reached, the lift member by the elastic means is attached to the lift member. Since the biasing release means for releasing the biasing and bringing the original pressure plate into close contact with the upper surface of the apparatus main body without applying the biasing force by the elastic means is provided, the position of the original pressure plate is automatically adjusted. The document pressing plate can be brought into close contact with the upper surface of the apparatus main body.

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 5 are views showing an example of a document crimping plate opening / closing device according to the present invention. As shown in FIGS. 1 to 5, the document crimping plate opening / closing apparatus according to the present invention is configured to pivotally attach a document crimping plate 12 to the rear end portion of the apparatus main body 11 of the office device 10. The office equipment 10 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, but will be described without particular limitation.

  For example, an automatic document feeder (not shown) is provided on the upper part of the original pressure plate 12. The automatic document feeder is for efficiently copying and transmitting a plurality of documents. This automatic document feeder includes a document feeder provided on one side of the upper part of the document crimping plate 12. When a document is set on the document feeder, the document reading unit (document reading unit of the apparatus main body 11 is automatically set). The contact glass 13 may also be used.) A plurality of documents are sequentially sent to the top so that they can be copied and transmitted.

  A document crimping plate opening / closing device 1 according to the present invention includes an attachment member 2 attached to an apparatus main body 11 of an office device 10, a support member 3 pivotally supported on the attachment member 2, and a support member 3. Overlapping and pivotally supported on the free end of the support member 3 and mounted between the attachment member 2 and the support member 3 and a lift member 4 attached to the document compression plate 12. And an elastic means 5 for urging the rotating member 12 in the opening direction and urging the lift member 4 in the direction overlapping the support member 3. The original pressing plate 12 is rotated so that the upper surface of the apparatus main body 11 faces the original pressing plate 12. The closed state covered with, and the open state exposing the upper surface thereof are formed. The document crimping plate opening / closing device 1 according to the present invention releases the urging of the lift member 4 by the elastic means 5 immediately before or when the document crimping plate 12 is rotated in the closing direction to become the closed state. Thus, there is a feature in that the bias release means 7 is provided for bringing the original cover 12 into close contact with the upper surface of the apparatus main body 11 in a state where the biasing force by the elastic means 5 does not act.

  The attachment member 2 includes, for example, a bottom plate 21 attached to the device main body 11, both side plates 22 extending from both side end portions of the bottom plate 21 in a direction orthogonal to the bottom plate 21 (including a direction substantially orthogonal), and a bottom plate It is preferable to comprise a substantially rectangular rear plate 23 extending from one end portion (rear end portion) of 21 to a direction orthogonal to the bottom plate 21 (including a direction substantially orthogonal).

  The bottom plate 21 is formed in a substantially rectangular shape, and is attached to the device main body 11 with screws, screws or the like. The side plate 22 is provided with a shaft hole 25 through which the first hinge pin 15 is inserted through a bearing (not shown) with a detent. A pressure receiving pin hole (not shown) through which the pressure receiving pin 16 is inserted is provided at a position forward of the shaft hole 25 of the side plate 22 and biased inward (frontward). The pressure receiving pin 16 is a pressure receiving member with which the outer surface of the bottom portion of the cam slider 52 abuts. The pressure receiving member is not limited to the pin such as the pressure receiving pin 16 but may be a roller, for example, a pressure receiving roller.

  As shown in FIGS. 1 to 6, the support member 3 includes, for example, an upper plate 31 that is a top plate, and directions that are orthogonal to the upper plate 31 from both end portions of the upper plate 31 (a direction that is substantially orthogonal) It is preferable that the two side plates 32 extend to the side plate 32 and the holding plate 33 is formed by bending the front end portions of the side plates 32 to the sides facing each other. The upper plate 31, the side plates 32, and the holding plate 33 constitute a housing portion 34.

  A second hinge pin hole 36 through which the second hinge pin 17 is inserted is provided at one end portion (rear end portion) of the both side plates 32, and a notch portion 35 into which an operation pin 18 described later is inserted. A shaft insertion hole 38 is provided at the other end portion (front end portion) of the side plates 32. The shaft insertion holes 38 of the side plates 32 and the shaft holes 25 of the side plates 22 of the attachment member 2 are aligned with each other, and between the holes 38, 25, that is, between the side plates 32 of the support member 3 and the side plates 22 of the attachment member 2. A washer 19 is provided therebetween, and the first hinge pin 15 is inserted into the holes 38 and 25 and the washer 19, whereby the support member 3 is connected to the mounting member 2 so as to be rotatable about the first hinge pin 15. ing. Further, on both side plates 32, sliding contact portions 39 for easily rotating the lift member 4 with respect to the support member 3 are respectively projected. The slidable contact portion 39 is formed, for example, in a substantially arc shape between the second hinge pin hole 36 and the cutout portion 35 of the both side plates 32. The sliding contact portion 39 is in contact with the inner surface of the side plate 42 of the lift member 4 and provides a clearance between the outer surface of the side plate 32 of the support member 3 and the inner surface of the side plate 42 of the lift member 4. The lift member 4 is rotated favorably.

  The lift member 4 is used to stably press a thick original on the upper surface of the apparatus main body 11. The lift member 4 includes an upper plate 41 attached to the rear end side of the original pressure plate 12 with screws, screws, and the like, and directions orthogonal to the upper plate 41 from both ends of the upper plate 41 (an approximately orthogonal direction is also included). And the support plate 3 is formed so as to cover the support member 3. A second hinge pin insertion hole (not shown) is provided at a position closer to the upper plate 41 than the center of one end (rear end) of the lift member 4, and on the other end side from the second hinge pin insertion hole. In addition, an operating pin hole (not shown) through which the operating pin 18 is inserted is provided at a position opposite to the upper plate 41 side from the center. The operating pin 18 is inserted and fixed in the operating pin hole of the both side plates 42. The second hinge pin insertion holes of the side plates 42 of the lift member 4 and the second hinge pin holes of the side plates 32 of the support member 3 are aligned with each other, and the second hinge pins 17 are inserted into these holes. The support member 3 is connected to the second hinge pin 17 so as to be rotatable with respect to each other.

  The elastic means 5 urges the document crimping plate 12 to rotate in the opening direction, urges the lift member 4 in a direction overlapping the support member 3, and when the document crimping plate 12 is below an arbitrary rotation angle, The elasticity for urging the original cover 12 is smaller than the moment of the original cover 12. In the present invention, the opening direction refers to a direction in which the original cover 12 is separated from the contact glass 13 when the original cover 12 is rotated. In the present invention, the closing direction refers to a direction in which the original cover 12 approaches the contact glass 13 when the original cover 12 is rotated in a direction opposite to the opening direction. In the present invention, the rotation angle is an angle of the original cover 12 with respect to the surface of the contact glass 13 that is the upper surface of the device body 11. The arbitrary rotation angle in the present invention is arbitrarily set by the urging force of the elastic means 5. For example, the urging force for urging the original pressing plate 12 by the elastic means 5 is based on the moment of the original pressing plate 12. This is a smaller angle.

  Although the elastic means 5 is not specifically limited, For example, it is the compression coil spring 53. The compression coil spring 53 is inserted into the support member 3 and elastically provided between the operation pin 18 and the pressure receiving pin 16. A spring receiving member 51 is provided between the operation pin 18 of the compression coil spring 53 and a cam slider 52 is provided between the pressure receiving pin 16 of the compression coil spring 53.

  The number of the compression coil springs 53 is not particularly limited, and may be one or more, and biases the spring receiving member 51 and the cam slider 52 in directions away from each other. The compression coil spring 53 urges the original cover 12 to rotate in the opening direction, and presses the original when the original cover 12 is not more than a predetermined rotation angle (for example, 20 ° (including around 20 °)). The elastic force for urging the plate 12 is smaller than the moment of the original cover 12.

  The spring receiving member 51 and the cam slider 52 are formed in a bottomed cylindrical shape having a rectangular cross section. The spring receiving member 51 and the cam slider 52 are individually slidably fitted into the receiving portion 34 of the support member 3 with the openings facing each other and the compression coil spring 53 being received therebetween. Has been inserted. The spring receiving member 51 and the cam slider 52 are arranged such that the bottom plate 21 of the mounting member 2 and the support member 3 (upper plate 31) are substantially parallel (for example, the original pressure plate on the contact glass 13 on the upper surface of the device body 11). When the sheet 12 is brought into close contact (when the document crimping plate 12 is in the closed position), it is formed with a length that fits into the accommodating portion 34 of the support member 3.

  The spring receiving member 51 presses the operating pin 18 by the urging force of the compression coil spring 53 and is urged so that the support member 3 and the lift member 4 overlap each other. That is, the upper plate 41 of the lift member 4 is brought into contact with or close to the contact portion 31 a that is a part of the upper plate 31 of the support member 3 by the urging force of the compression coil spring 53. At this time, it is preferable that the upper plate 41 is substantially parallel to the contact glass 13, for example. The upper plate 41 of the lift member 4 may be brought into contact with or close to the upper plate 31 of the support member 3.

  A protrusion 52 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 52. The protrusion 52 a is formed to extend substantially parallel to the upper plate 31 of the support member 3. The bottom outer surface of the cam slider 52 on the upper plate 31 side from the protrusion 52a is a pin contact portion with which a stopper pin (not shown) abuts when a stopper pin (not shown) is inserted into a stopper hole 37 described later. 52c is formed. Below the protrusion 52a is formed as an inclined portion 52b that is gradually inclined. The protrusion 52a and the inclined portion 52b on the outer surface of the bottom portion of the cam slider 52 are formed as one kind of cam.

  That is, when the original crimping plate 12 (see FIG. 1) in the closed position is rotated about the first hinge pin 15 in the direction away from the contact glass 13 (upward), the portion that contacts the pressure receiving pin 16 is a protrusion. The cam slider 52 is slid gradually from the 52a to the inclined portion 52b, and the cam coil 52 is slid by being pressed toward the rear end by the compression coil spring 53, so that the compression coil spring 53 is gradually extended. When the original pressing plate 12 reaches a maximum use opening angle (for example, 60 ° (including around 60 °) to 70 ° (including around 70 °)) (see FIG. 2), the opening and closing of the original pressing plate 12 is the original pressing. It is regulated by a plate 12 opening / closing regulation mechanism (not shown).

    Further, it is preferable that stopper holes 37 are provided in both side plates 32 of the support member 3. The stopper hole 37 is provided to prevent the cam slider 52 from blocking the shaft insertion hole 38 by the urging force of the compression coil spring 53, and is used particularly effectively during assembly. The position of the stopper hole 37 is not particularly limited as long as it is between the free end portion of the support member 3 and the shaft insertion hole, but the shaft hole 25 of the attachment member 2 and the shaft insertion hole of the support member 3 are aligned. In this case, the cam slider 52 is not particularly limited as long as the end surface of the cam slider 52 is in contact with the pressure receiving pin 16 and does not get in the way. As a result, the hole alignment between the shaft insertion hole of the support member 3 and the shaft hole 25 of the mounting member 2 via the washer 19 and the insertion of the first hinge pin 15 are facilitated, and the assemblability is improved.

  A damper device 8 is preferably provided in the compression coil spring 53. The damper device 8 is configured such that when the original cover 12 is rotated in the closing direction, the original cover 12 only at a specific rotation angle equal to or less than an arbitrary rotation angle of the original cover 12 (for example, about 10 ° or less). 12 operates so as to reduce the rotational speed.

  The damper device 8 is, for example, an oil damper device. The damper device 8 is not particularly limited as long as the rotation speed of the original cover 12 can be reduced only at a specific angle or less (for example, about 10 ° or less) of the original cover 12. The damper device 8 includes, for example, a cylinder (not shown) filled with oil such as silicon oil, and a piston that is movably provided in the cylinder and is urged so that the exposed length exposed from the cylinder becomes long. It is preferable to consist of the rod 81. In addition, although the damper apparatus was provided, it is not limited to this, It is not necessary to provide a damper apparatus.

  The bias release means 7 releases the bias to the lift member 4 by the compression coil spring 53 immediately before or when the original press plate 12 is rotated in the closing direction to enter the closed state, and the original press plate 12 is brought into close contact with the upper surface of the apparatus main body 11 in a state where the urging force by the compression coil spring 53 does not act. The urging release means 7 is not particularly limited. For example, the urging release member provided on the mounting member 2 and a cam portion 72 provided on the spring receiving member 51 that engages with the urging release member. Preferably it consists of.

  The bias release member releases the bias to the lift member 4 by the compression coil spring 53 when the cam portion 72 comes into contact. For example, the bias release member is attached to the upper front portion of the side plates 22 of the attachment member 2. . The bias release member is not particularly limited, and may be a bias release roller 71 that is rotatably attached to both side plates 22 or a pin. The cam portion 72 is provided below the spring receiving member 51. The cam part 72 is not specifically limited, For example, it is formed in the substantially triangular shape. Immediately before or when the cam portion 72 rotates the document crimping plate 12 in the closing direction to enter the closing state, the cam portion 72 contacts the biasing release roller 71 and is attached to the lift member 4 by the compression coil spring 53. The force is released, the original cover 12 is freely rotated about the second hinge pin 17 and the height of the original cover 12 is automatically adjusted, so that the horizontal position of the original cover 12 is adjusted. It has become.

  Next, the operation of the original cover 1 and the office machine 10 according to the present invention will be described.

  The original cover 12 is in close contact with the contact glass 13 of the device body 11 as shown in FIG. 1 when the device body 11 is not used. In order to place a document on the contact glass 13, first, hold a grip portion provided at the end of the document crimping plate 12 on the side opposite to the portion where the lift member 4 is attached or in the vicinity thereof. Then, the original cover 12 is lifted upward. That is, the original cover 12 is rotated only about the first hinge pin 15 as an axis to expose the surface of the contact glass 13 to the outside as shown in FIG. Thus, when the original cover 12 is rotated, the original cover 12 is urged to rotate in the opening direction by the urging force of the compression coil spring 53, so that it can rotate in the opening direction without feeling weight. it can.

  After placing the document on the exposed contact glass 13 surface, the lifted document pressing plate 12 is lowered. That is, the original crimping plate 12 is rotated about the first hinge pin 15 in the closing direction in contact with the contact glass 13 and moved downward to be in the closed state. When the original cover 12 is rotated, a little force is initially required to resist the urging force of the compression coil spring 53. For example, the rotation angle of the original cover 12 is 20 ° (around 20 °). In the following, since the downward rotating force of the original cover 12 due to the weight of the original cover 12 becomes stronger than the urging force of the compression coil spring 53, the original cover 12 moves downward. When the rotation angle of the original cover 12 becomes a specific rotation angle, for example, 10 ° (including around 10 °), the tip of the piston rod 81 of the damper device 8 comes into contact with the inner surface of the cam slider 52, and the piston rod 81 moves into the cylinder, the exposed length of the piston rod 81 is shortened, and the rotation speed of the original cover 12 is reduced. As a result, since the rotational speed of the original cover 12 is controlled by the damper device 8, the original cover 12 does not collide with the contact glass 13 vigorously.

  When the original pressure plate 12 is rotated in the closing direction to be in the closed state, the cam portion 72 comes into contact with the bias release roller 71 immediately before or after the closing state, and the lift by the compression coil spring 53 is performed. The bias to the member 4 is released, and the document crimping plate 12 freely rotates about the second hinge pin 17 via the lift member 4 so that the document crimping plate 12 is in close contact with the surface of the contact glass 13. The height of the pressure plate 12 is automatically adjusted. At this time, since the original pressure plate 12 is rotated about the first hinge pin 15 by the weight of the original pressure plate 12, the original pressure plate 12 is securely attached to the surface of the contact glass 13. That is, the height of the original cover 12 is automatically adjusted so that the original cover 12 is in close contact with the contact glass 13 when there is no original on the contact glass 13. Twelve horizontal positions are adjusted. As a result, for example, when the original is thin paper, the original can be reliably brought into close contact with the contact glass 13 without being lifted from the contact glass 13 by the original pressure plate 12, so that the original can be copied well. be able to. That is, the original pressing plate 12 is brought into close contact with the contact glass 13 so that light does not enter between the original pressing plate 12 and the contact glass 13, and the original can be copied well.

  Further, when the original is thick like a book, when the original pressing plate 12 is rotated (moved downward), the supporting member 3 of the original pressing plate 12 at or near the end of the original supporting member 3 side. A part of the vicinity of the document comes into contact, and a space is formed between the end of the document opposite to the end on the support member 3 side and the document crimping plate 12. That is, the original cover 12 at the end on the gripping portion side is in a floating state. When, for example, the vicinity of the end of the gripping document pressing plate 12 on the gripping portion side is pressed toward the contact glass 13, the operating pin 18 presses the spring receiving member 51 toward the cam slider 52, and the urging force of the compression coil spring 53. Against this, the spring receiving member 51 moves to the cam slider 52 side, and the original cover 12 (lift member 4) rotates around the second hinge pin 17. That is, the original cover 12 moves so as to cover the upper part of the original. For example, when the upper part of the original is a flat surface, the original cover 12 contacts the upper part. As a result, a thick original is stably brought into close contact with the contact glass 13. Therefore, the original cover 12 can stably adhere the original to the contact glass 13 regardless of the thickness of the original.

  In order to copy a plurality of documents, for example, a plurality of documents are placed on the document feeding portion on the document crimping plate 12 while the document crimping plate 12 is in close contact with the contact glass 13 of the apparatus body 11. set. After setting, by pushing the start button, a plurality of documents are automatically automatically fed from the document feeder to, for example, the contact glass 13 and continuously copied one by one.

  When the document is fed from the document feeding unit onto the contact glass 13, the portion of the document crimping plate 12 to which the lift member 4 is attached floats from the surface of the contact glass 13, and the document is parallel to the document reading unit (normal) In other words, if the original is bent and sent onto the contact glass 13, the original is read and bent, and accurate copying cannot be performed. 1 and the office device 10 are provided with the urging release means 7, so that the height of the document pressing plate 12 with respect to the device body 11 is automatically adjusted and the document is normally sent to the document reading unit. be able to.

  That is, when the original cover 12 is rotated in the closing direction to be in the closed state, the cam portion 72 comes into contact with the bias release roller 71 immediately before or after the closing state, and the compression coil spring 53. The urging force applied to the lift member 4 is released, and the original cover 12 is freely rotated about the second hinge pin 17 via the lift member 4 so that the original cover 12 contacts the surface of the contact glass 13. The height of the original cover 12 is automatically adjusted. At this time, since the original pressure plate 12 is rotated about the first hinge pin 15 by the weight of the original pressure plate 12, the original pressure plate 12 is securely attached to the surface of the contact glass 13. That is, the height of the original cover 12 is automatically adjusted so that the original cover 12 is in close contact with the contact glass 13 when there is no original on the contact glass 13. Twelve horizontal positions are adjusted. As a result, since the document is fed in parallel to the contact glass 13 from the document feeding unit, a plurality of documents can be automatically fed sequentially onto the contact glass 13 and continuously copied one by one.

  Therefore, the document crimping plate opening / closing device 1 and the office equipment 10 according to the present invention rotate the document crimping plate 12 in the closing direction and immediately before or when the closing state is reached, the elastic means 5 applies the lift member 4 to the lift member 4. Since the biasing release means 7 for releasing the biasing and bringing the document pressing plate 12 into close contact with the upper surface of the apparatus main body 11 without applying the biasing force by the elastic means 5 is provided, the position of the document pressing plate 12 is automatically set. Is adjusted so that the original pressing plate 12 can be brought into close contact with the upper surface of the apparatus main body 11, and copying and the like can be performed satisfactorily.

  Further, in the original pressure plate opening / closing device 1 and the office machine 10 according to the present invention, the cam portion 72 comes into contact with the bias release roller 71 and the bias to the lift member 4 by the compression coil spring 53 is released. From the state in which the upper plate 41 can be substantially parallel to the contact glass 13 (see FIGS. 4 and 5C), the upper plate 41 of the lift member 4 contacts the contact portion 31a of the upper plate 31 of the support member 3. Since the height of the original pressure plate 12 is automatically adjusted until it is in contact with or close to the state (see FIG. 3 and FIG. 5B), for example, the original pressure plate 12 is contacted at approximately the middle between them. It is preferable to set the document crimping plate opening / closing device 1 according to the present invention so as to be in close contact with the glass 13 (see FIGS. 1 and 5A) and attach it to the apparatus main body 11. As a result, the height of the original cover 12 is automatically adjusted in the vertical direction, so that the original cover 12 can be reliably brought into close contact with the upper surface of the apparatus body 11. Further, by changing the shapes of the bias release roller 71 and the cam portion 72, the height of the original cover 12 that can be automatically adjusted changes. Therefore, the original cover 12 is automatically adjusted according to the office equipment 10. The possible height can be selected, and the versatility is excellent.

  As described above, the manuscript crimping plate opening / closing device according to the present invention releases the urging force by the elastic means immediately before or after the manuscript crimping plate is rotated in the closing direction to become the closing state, Since the bias release means is provided to bring the original crimping plate into close contact with the upper surface of the device main body without applying the biasing force by the means, the position of the original crimping plate is automatically adjusted so that the original crimping plate is placed on the upper surface of the main device body. Since it can be brought into close contact, it is particularly suitably used as a document pressure plate opening / closing device for office machines such as copying machines, printing machines, facsimile machines, and scanners.

It is a sectional side view which shows an example of the original document crimping plate opening / closing apparatus concerning this invention, and shows a normal closed state. It is a sectional side view which shows an example of the original document crimping plate opening / closing apparatus concerning this invention, and shows an open state. FIG. 3 is a side sectional view showing an example of a document pressure-bonding plate opening / closing device according to the present invention and showing a state where the height of the document pressure-bonding plate is minimum. FIG. 3 is a side sectional view showing an example of a document pressure-bonding plate opening / closing device according to the present invention and showing a state where the height of the document pressure-bonding plate is maximum. FIG. 4 is a side view showing an example of a document crimping plate opening and closing device according to the present invention, in which (a) is a diagram showing a normal closed state, (b) is a diagram showing a state where the height of a document crimping plate is minimum, and (c) ) Is a diagram showing a state in which the height of the original cover is maximum. It is a figure which shows an example of the supporting member which concerns on this invention, (a) is a top view, (b) is a left view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Document pressing plate opening / closing device 2 Mounting member 3 Support member 4 Lifting member 5 Elastic means 7 Biasing release means 8 Damper device 10 Office equipment 11 Equipment main body 12 Document pressing plate 13 Contact glass 51 Spring receiving member 52 Slider 53 Compression coil spring 71 Biasing release roller 72 Cam part

Claims (5)

An attachment member attached to the device main body of the office equipment, a support member pivotally supported by the attachment member via a first hinge pin, and a second member that overlaps with the support member and is attached to the free end of the support member . A lift member that is pivotally supported via a hinge pin and attached to the original pressure plate, and is slidably held in the support member , provided on the pressure receiving pin provided on the attachment member and the lift member A slider and a spring receiving member each provided with one end thereof in contact with each of the actuating pins, and elastic means provided between the slider and the spring receiving member, and the elastic means via the spring receiving member. the original cover to the opening direction causes a rotation urging the lift member is rotationally biased to the direction overlapping with the support member, the apparatus main body by rotating the original cover Te A document cover closer to form a closed state covering the top surface with the original cover and the open state to expose the upper surface,
Immediately before or when the original pressure plate is rotated in the closing direction to become the closed state, the spring receiving member is actuated to release the urging of the lift member by the elastic means, and the elasticity An apparatus for opening and closing a document pressure-bonding plate, comprising: biasing release means for bringing the document pressure-bonding plate into close contact with the upper surface of the apparatus main body in a state where a biasing force by the means is not applied. The pre-Symbol urging release means, biasing release member provided on said mounting member, in contact with the biasing release member provided on the spring receiving member, for restricting the sliding movement of the spring receiving member cam The document crimping plate opening and closing device according to claim 1, wherein the document crimping plate opening and closing device is configured with a section.   The document pressing plate opening and closing device according to claim 2, wherein the bias release member is a bias release roller.   Provided between the mounting member and the support member, and when the original cover is rotated in the closing direction, the rotation speed of the original cover is operated only at a predetermined closing angle of the original cover. The document crimping plate opening / closing device according to any one of claims 1 to 3, further comprising a damper device that reduces the amount of noise.   An office machine comprising the document crimping plate opening and closing device according to any one of claims 1 to 4.

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