JP2009071804A - Device for opening and closing original pressing plate and office equipment with the plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for opening and closing an original pressing plate which has a simple configuration preventing a manufacturing cost increase to exert a brake function, and provide a fine operation feeling. <P>SOLUTION: The device includes a fitting member 2 fitted to the apparatus body side, a support member 3 which is fitted rotatably to the fitting member 2 and supports the original pressing plate, a slider 5 set slidably inside the support member 3, a cam member 6 which is set in slidable contact with the slider 5 and is disposed on the fitting member 2, and an elastic member 17 which is disposed between the slider 5 and the fitting member 2 and puts the slider 5 in pressure contact with the cam member 6 to control the opening/closing action of the original pressing plate. The slider 5 is provided with an engaging recess 7 and the cam member 6 is provided with an insertion projection 8 having a rotation control portion 9, so that rotating the support member 3 against the fitting member 2 causes a large reaction torque in the course of rotation to control the opening/closing action of the original pressing plate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

  In the main body of office equipment such as copiers, printing machines, facsimile machines, scanners, etc., the original pressure plate that covers the upper surface of the contact glass provided on the main body of the device is opened and closed via the original pressure plate opening / closing device. It is attached as possible. 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. To set the document on the contact glass, open the document crimping plate (by moving the document crimping plate away from the contact glass (sometimes called the opening direction)) to expose the upper surface of the contact glass, After placing the document on the contact glass, the document crimping plate is closed and the document is crimped onto the contact glass with the document crimping plate.

Among such document crimping plate opening / closing devices, there is known a document crimping plate opening / closing device capable of opening the document crimping plate without feeling the original weight due to the urging force of the compression spring (for example, Patent Documents). 1). The document crimping plate opening and closing device includes an attachment member that is attached to an apparatus main body of an office machine, a support member that is rotatably attached to the attachment member via a hinge pin, and that is attached to the document crimping plate. And a compression spring that biases in the opening direction. Since the compression plate is urged to rotate in the opening direction by the compression spring via the support member, when the document compression plate is rotated in the opening direction, the original weight is not felt by the urging force of the compression spring. The crimping plate can be opened.
Japanese Patent No. 3262457

  The document crimping plate opening / closing device described in Patent Document 1 requires some force at first to resist the urging force of the compression spring when the document crimping plate is closed (rotated in the closing direction). However, since the rotation moment for closing the original cover is larger than the urging force of the compression spring urging the original cover on the way, the original cover can be easily closed. However, especially when the original pressure plate is heavy with an automatic original feeder, the rotation speed of the original pressure plate increases and the original pressure plate may strike the contact glass with force. Therefore, various measures have been taken, such as providing a damper means, but all of them are manufactured at a high manufacturing cost or because the operation feeling when opening and closing the document crimping plate is bad. There is a need for a document pressure plate opening / closing device with a brake function that has a simple configuration that does not increase costs and that does not affect the feeling during opening / closing operations.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a manuscript crimping plate opening / closing device and a manuscript device equipped with a manuscript crimping plate that exhibit a braking function with a simple configuration that does not increase manufacturing costs and that have a good operation feeling.

  In order to achieve the above object, a document crimping plate opening / closing apparatus according to the present invention includes an attachment member attached to the apparatus main body side of an office machine having a document crimping plate, and is attached to the attachment member so as to be rotatable and the document. A support member that supports the pressure plate, a slider that is slidably mounted on one of the support member and the mounting member, and the other of the support member and the mounting member that is in sliding contact with the slider Provided between the slider and the supporting member or the mounting member in which the slider is accommodated, and the slider is pressed against the cam member to open the original cover. A pressure-bonding plate opening / closing device provided with an elastic member for controlling the movement, wherein either one of the slider and the cam member is provided with a fitting recess The other one of the slider and the cam member is provided with an insertion convex portion that fits into the fitting concave portion, and a rotation control portion is provided at at least one of the fitting concave portion and the insertion convex portion. On the other hand, when the support member is rotated, a large friction torque is generated in the middle of the rotation to control the opening / closing operation of the document crimping plate.

  According to the present invention, one of the slider and the cam member is provided with the fitting concave portion, and the other one of the slider and the cam member is provided with the insertion convex portion to be fitted with the fitting concave portion. A rotation control unit is provided on at least one of the parts, and when the support member is rotated with respect to the mounting member, a large friction torque is generated during the rotation to control the opening / closing operation of the original cover. Therefore, by forming the rotation control unit so that a large friction torque is generated when the original cover is positioned in the vicinity of the upper surface of the apparatus body, there is no possibility that the original cover will strike the apparatus body. It is also possible to form the rotation control unit so that the operation feeling during the opening / closing operation of the original cover is improved. As a result, it is possible to obtain a manuscript crimping plate opening / closing device that exhibits a braking function with a simple configuration that does not increase the manufacturing cost and also has a good operation feeling.

  In the document crimping plate opening and closing device according to the present invention, the fitting recess is a slit-like engagement groove extending in the slider sliding direction, and the insertion protrusion extends and projects in the slider sliding direction. It is preferable that the rotation control unit is formed by widening a part of the engagement convex piece. In the document crimping plate opening and closing device according to the present invention, the fitting recess is a slit-like engagement groove extending in the sliding direction of the slider, and a part of the engagement groove is narrowed to reduce the width. It is preferable to form a rotation control unit. Further, in the document crimping plate opening and closing device according to the present invention, the fitting recess is a slit-shaped engaging groove portion having a concave cross section extending in the sliding direction of the slider, and a part of the bottom portion of the engaging groove portion protrudes. Preferably, the rotation control unit is formed. In the document pressing plate opening / closing apparatus according to the present invention, it is preferable that one or more of the fitting recess and the insertion protrusion are provided. In the document pressing plate opening and closing device according to the present invention, when the support member is rotated with respect to the mounting member, the slider and the cam member generate a friction torque between the mounting member and the supporting member. It is preferable that each of the cams is formed in a cam shape that is generated and stopped with respect to the apparatus main body by a free stop.

  Further, in the document crimping plate opening and closing device according to the present invention, the rotation control unit is configured so that the document crimping plate is positioned near the upper surface of the device body and / or the document crimping plate is in an upright state with respect to the device body. It is preferable to provide a large friction torque when positioned. Further, in the document crimping plate opening / closing apparatus according to the present invention, the attachment member has a bottom plate attached to the upper surface of the apparatus main body, and both side plates raised from both side portions of the bottom plate, and the supporting plate is supported by the both side plates. It is preferable that the member is rotatably attached via a hinge pin, and the cam member is attached between the side plates. Also, in the document crimping plate opening / closing apparatus according to the present invention, it is preferable that the mounting member has a leg portion that is inserted into a mounting hole provided in the vertical direction in the device main body so as to be movable up and down. In the document pressing plate opening / closing apparatus according to the present invention, it is preferable that the leg portion is formed in a cylindrical shape, and the slider and an elastic member that slidably biases the slider in one direction are provided therein. . Further, in the document crimping plate opening and closing device according to the present invention, a lift member is attached to the free end side of the support member so as to be rotatable in a direction different from the rotation direction of the support member, It is preferable that the original cover is attached to the lift member. In the document crimping plate opening and closing apparatus according to the present invention, the mounting member includes a base portion having a rotation restricting portion on an upper end side of the leg portion, and the supporting member has a restricting portion that contacts the rotation restricting portion. It is preferable to have.

  In order to achieve the above object, an office machine provided with the original cover according to the present invention includes the original cover opening / closing device according to the present invention. According to the present invention, as described above, the fitting recess is provided on one of the slider and the cam member, and the insertion protrusion is provided on the other of the slider and the cam member so as to fit the fitting recess. A rotation control unit is provided in at least one of the joint recess and the insertion projection, and when the support member is rotated with respect to the mounting member, a large friction torque is generated during the rotation to control the opening / closing operation of the original cover. Thus, it is possible to obtain a manuscript pressing plate opening / closing device that exhibits a brake function with a simple configuration that does not increase the manufacturing cost and that has a good operation feeling.

  As described above, according to the document crimping plate opening and closing device and the office equipment provided with the document crimping plate according to the present invention, one of the slider and the cam member is provided with the fitting recess, and the other of the slider and the cam member is provided. In this case, an insertion convex portion that fits into the fitting concave portion is provided, a rotation control portion is provided in at least one of the fitting concave portion and the insertion convex portion, and the support member is rotated with respect to the mounting member. Since it is configured to control the opening / closing operation of the original cover by generating a large friction torque, it provides a simple function that does not increase the manufacturing cost, and provides an original opening / closing device with a good operation feeling. It is done.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A document crimping plate opening / closing device and an office machine equipped with a document crimping plate according to the present invention will be described below in detail with reference to the accompanying drawings. In the following description, a description will be given of a case where the present invention is applied to a document pressing plate opening / closing apparatus having a leg portion and having a lift function and a structure in which a slider and elastic means are not housed in the leg portion. As will be described later, the present invention can be implemented as long as there is no hindrance to the document pressure plate opening / closing device having a configuration other than the configuration described in the following embodiments.

  1 to 3 are views showing an example of a document pressing plate opening / closing device according to the present invention. As shown in FIGS. 1 to 3, the document crimping plate opening / closing apparatus according to the present invention is configured to attach a document crimping plate 12 to the rear end portion of the apparatus main body 11 of the office device 10 so as to be opened and closed. 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.

  The document crimping plate opening / closing device 1 according to the present invention is attached to the attachment body 2 of the office equipment 10 having the document crimping plate 12 and to the mounting member 2 so as to be rotatable about the hinge pin 16 as an axis. The support member 3 that supports the original cover 12, and one of the support member 3 and the attachment member 2, for example, the slider 5 that is slidably mounted on the support member 3, and the slider 5 are in sliding contact with the support member 3. And the other of the attachment members 2, for example, a cam member 6 provided on the attachment member 2, and provided between the slider 5 and the support member 3. And an elastic member 17 that controls the opening operation, and the document pressing plate 12 is rotated to form a closed state in which the upper surface of the apparatus body 11 is covered with the document pressing plate 12 and an opening state in which the upper surface is exposed. Is shall. The document pressing plate opening / closing device 1 according to the present invention is provided with an insertion convex portion 8 on one of the slider 5 and the cam member 6, for example, the cam member 6, and on the other of the slider 5 and the cam member 6, for example, the slider 5. When the fitting concave portion 7 to be fitted with the insertion convex portion 8 is provided, the rotation control portion 9 is provided in at least one of the fitting concave portion 7 and the insertion convex portion 8, and the support member 3 is rotated with respect to the mounting member 2. A feature is that a large friction torque is generated during the rotation to control the opening / closing operation of the original cover 12.

  For example, a contact glass (not shown) is provided on the upper surface of the apparatus body 11, and a document is brought into close contact with the contact glass by the document crimping plate 12, and the contact glass is covered with the document crimping plate 12. It has become. Concave mounting holes 13 extending in the vertical direction (sometimes referred to as the height direction) are provided at two locations near the rear end of the upper surface of the device body 11. The attachment hole 13 is formed in a rectangular cross section. On the rear surface of the mounting hole 13, a movement allowing recess 14 extending in the height direction is provided. The length in the height direction of the movement-permissible recess 14 determines the range of movement in the height direction of the original cover 1 and is not particularly limited and can be set arbitrarily.

  As shown in FIGS. 1 to 4, the mounting member 2 includes, for example, a base portion 21, leg portions 25 extending downward from the lower surface of the base portion 21, and a rotating portion 22 provided on the upper surface of the base portion 21. . The attachment member 2 is formed of, for example, a synthetic resin, but is not limited to this, and may be formed of other materials.

  The base 21 is formed in a substantially rectangular flat plate shape. Legs 25 extending downward from the lower surface are provided on the lower surface of the base 21. The leg portion 25 is formed in a substantially rectangular shape with a smaller cross section than the base portion 21, and the leg portion 25 is inserted into the attachment hole 13 of the device main body 11, so that the original cover 1 is attached to the device main body 11. A plurality of guide pieces 25 a are provided on the upper portions of the four surfaces (front surface, rear surface, and both side surfaces) of the leg portion 25. A substantially rectangular convex portion 26 whose lower surface is inclined is provided at the lower portion of the rear surface of the leg portion 25. The projection 26 engages with the movement-permissible recess 14 when the leg 25 is inserted into the mounting hole 13, and is within the range from the projection 26 contacting the upper end of the movement-permissible recess 14. The leg portion 25, that is, the original cover 1 is movably supported in the height direction. Further, the lower portion of the front surface of the leg portion 25 is inclined and formed as a tapered surface 25b, and the leg portion 25 is brought to the rear surface side in a state where the convex portion 26 is in contact with or close to the upper end portion of the movement-allowing concave portion 14. When tilted, the tapered surface 25 b comes into surface contact with or close to the front wall of the mounting hole 13, and the convex portion 26 is detached from the movement-permissible concave portion 14, so that the leg portion 25 can be removed from the mounting hole 13.

  The rotating part 22 is formed in a substantially rectangular parallelepiped shape whose cross section in the plane direction is smaller than the base part 21. A shaft hole 22a penetrating both side surfaces is provided above the rotating portion 22 and slightly on the rear side. The hinge pin 16 is inserted into the shaft hole 22a via the bearing 28. The rotating member 22 is formed as a cam member 6 that slides from the front surface to the upper surface in a state where the slider 5 is pressed. The cam member 6 is formed by curving corners between the front surface and the upper surface. Further, the upper surface (upper end) on both side surfaces of the base portion 21 on both side surfaces of the rotating portion 22 is formed in two steps higher on the front surface, and the wall portion forming the two steps is inclined and rotated. It is formed as a restriction part 23.

  The support member 3 is formed of, for example, a synthetic resin, but is not limited thereto, and may be formed of other materials. As shown in FIGS. 1 to 3, the support member 3 is formed in a rectangular cylindrical shape from, for example, an upper plate 3 a, both side plates 3 b, and a lower plate 3 c. One end portion of the support member 3 is closed and formed as an elastic member support portion 3d. The other end of the support member 3 is opened. The side plates 3b are provided with mounting pieces 3e and 3f which are attached to the rear end side of the original cover 12 with screws or the like. The ends of the side plates 3b are extended and formed as rotating pieces 31. The length between the rotating pieces 31 is longer than the length between both side portions of the rotating portion 22 of the mounting member 2, for example, is formed with a slightly longer dimension. The rotating piece 31 is provided with a shaft insertion hole 32 through which the hinge pin 16 is inserted. The shaft insertion hole 32 of the rotating piece 31 and the shaft hole 22a of the attachment member 2 are aligned with each other, and the hinge pin 16 is inserted into these holes 32 and 22a through washers or the like, thereby supporting the attachment member 2. The member 3 is connected to the hinge pin 16 so as to be rotatable.

  The tip of the rotating piece 31 abuts against the rotation restricting portion 23 of the mounting member 2 when the original cover 12 is opened (rotated in the opening direction) (see FIGS. 2B and 2C). ) And a restricting portion 33 for restricting the rotation range 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 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 when the original cover 12 is rotated in a direction opposite to the opening direction.

  The elastic member 17 urges the document pressing plate 12 in the opening direction to rotate, that is, in the opening direction. Although the elastic member 17 is not specifically limited, For example, it is the compression spring 17a. The compression spring 17 a is accommodated in the support member 3 and is elastically provided between the elastic member support portion 3 d and the cam member 6. One end portion of the compression spring 17 a is supported by the elastic member support portion 3 d, and the other end portion of the compression spring 17 a is accommodated in the slider 5 and is in contact with the cam member 6 via the slider 5. That is, the compression spring 17a presses the original cover 12 in the opening direction by pressing the slider 5 against the cam member 6. The number of compression springs 17a is not particularly limited, and may be one or two or more in the illustrated example.

  The slider 5 is formed of, for example, a synthetic resin, but is not limited to this, and may be formed of other materials. As shown in FIGS. 3 and 5, the slider 5 is accommodated in the support member 3 so as to close the support member 3. The slider 5 is formed in a rectangular bottomed cylindrical body, for example. The inside of the slider 5 is formed in a circular shape as a spring accommodating portion 5 b, the other end portion of the compression spring 17 a is accommodated in the spring accommodating portion 5 b, and the abutting portion 5 a that is the bottom portion of the slider 5 is attached to the cam member 6. It comes to contact. The abutting portion 5 a is provided with a sliding portion 51 that is in sliding contact with the cam member 6. The shape of the cam member 6 is such that when the original cover 12 is rotated in the opening direction about the hinge pin 16, the original cover 12 rises gradually and the original press plate 12 is forced to fall in the closing direction by its own weight. It is preferable that the compression spring 17a is extended in response to this operation and its urging force is weakened so that the original cover 12 does not jump up.

  The fitting concave portion 7 and the insertion convex portion 8 are fitted with each other. The fitting recess 7 may be provided on both the cam member 6 and the slider 5, but is preferably provided on either the cam member 6 or the slider 5, for example, provided on the slider 5. For example, the fitting recess 7 has a slit shape at a substantially central portion of the contact portion 5a of the slider 5 in the height direction (sliding direction) from the upper side to the lower side (including the sliding portion 51). It is the engagement groove part 71 formed in this. For example, the engaging groove portions 71 are formed to have substantially the same width.

  The insertion convex portion 8 is provided facing the fitting concave portion 7 and may be provided on both the cam member 6 and the slider 5, but is preferably provided on either the cam member 6 or the slider 5. The cam member 6 is provided. The insertion convex portion 8 is, for example, an insertion convex piece 81 that extends in the sliding direction of the slider 5 and protrudes. The insertion convex piece 81 is provided, for example, at a substantially central portion of the cam member 6 from the upper surface thereof to the lower portion of the front surface. The width of the insertion convex piece 81 is smaller than the width of the engagement groove 71.

  The rotation control unit 9 is for controlling the rotation speed of the original cover 12 by generating a large friction torque during the rotation when the support member 3 is rotated with respect to the attachment member 2. Although the rotation control part 9 may be provided in both the fitting recessed part 7 and the insertion convex part 8, it is preferable to provide in any one of the fitting recessed part 7 and the insertion convex part 8, for example, the insertion convex part 8 ( Insertion convex piece 81) is provided. The rotation control unit 9 is not particularly limited as long as the rotation speed of the original cover 12 can be controlled. For example, the rotation control unit 9 may be formed with a wider width of the insertion convex piece 81. The width of the rotation control unit 9 is preferably formed to be substantially the same as or slightly wider than the width of the engagement groove 71, for example. The boundary between the rotation control unit 9 and the insertion convex piece 81 may be formed in a step shape, but is preferably formed by being inclined. That is, it is preferable to gradually increase the width of the insertion convex piece 81 to form the rotation control unit 9. The position of the rotation control unit 9 is arbitrarily determined. For example, the height direction of the front surface of the cam member 6 is set so that a large friction torque is generated when the document pressing plate 12 is positioned in the vicinity of the apparatus main body 11. It is formed in one place of the substantially central part.

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

  When the apparatus main body 11 is not used, the original cover 12 is in close contact with the contact glass of the apparatus main body 11 to cover the contact glass as shown in FIG. At this time, the engaging groove 71 and the insertion convex piece 81 are engaged. In order to place a document on the contact glass, first, the document crimping plate 12 is held by holding the end of the document crimping plate 12 on the side opposite to the portion where the document crimping plate opening / closing device 1 is attached or in the vicinity thereof. Lift up. That is, the original cover 12 is rotated about the hinge pin 16 to expose the upper surface of the contact glass to the outside, and the original cover 12 is positioned at the open position. At this time, as shown in FIGS. 2B and 2C, the restricting portion 33 of the support member 3 comes into contact with the rotation restricting portion 23 of the mounting member 2, so that the original cover 12 is not opened too much and the maximum opening is achieved. Can be positioned. Further, 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 spring 17a, so that it can rotate in the opening direction without feeling weight. Further, the support member 3 (the original pressure bonding plate 12) rotates with respect to the attachment member 2 while the engagement groove portion 71 and the insertion convex piece 81 are fitted and engaged.

  After placing the document on the exposed contact glass surface, the lifted document pressing plate 12 is lowered. That is, the document pressing plate 12 is rotated about the hinge pin 16 in the closing direction in contact with the contact glass and moved downward to be in the closed state. At this time, a little force is initially required to resist the urging force of the compression spring 17a, but the moment of the original pressure plate 12 is larger than the urging force of the compression spring 17a urging the original pressure plate 12 along the way. Therefore, the original cover 12 can be easily rotated. When the original cover 12 is further rotated, the rotational speed of the original cover 12 is increased, but both side surfaces of the rotation control unit 9 are in sliding contact with both side walls of the engagement groove 71 to generate a large friction torque. The rotational speed of the original cover 12 is reduced. As a result, there is no fear that the original cover 12 will strike the contact glass. If the original placed on the contact glass is a thin object, for example, a thin sheet of paper, the original press plate 12 rotates only about the hinge pin 16 and the original press plate 12 does not lift the original from the contact glass. So that the original can be copied well.

  When the original is thick like a book, when the original pressing plate 12 is rotated in the closing direction after the original is placed on the contact glass, before the original pressing plate 12 is closed, that is, the original Before the pressure-bonding plate 12 is brought into close contact with the contact glass, the document pressure-bonding plate 12 comes into contact with the end portion of the document, and a space is formed between the end portion opposite to the end portion of the document and the document pressure-bonding plate 12. Is done. That is, the document crimping plate 12 is in a state where the end opposite to the document crimping plate opening / closing device 1 is lifted. By pressing the floating document pressing plate 12 toward the apparatus main body 11 or by the weight of the document pressing plate 12, the leg portion 25 moves in the direction (upward) from the mounting hole 13 to move the document pressing plate opening / closing device 1. Moves upward, and the original cover 12 rotates about the hinge pin 16 as an axis. That is, the height of the original cover 1 is automatically adjusted so as to cover the upper part of the original, and the original cover 12 moves. For example, when the upper part of the original is a flat surface, the original cover 12 is in surface contact with the upper part. As a result, a thick original is stably adhered to the contact glass. Therefore, the original pressing plate 12 can stably adhere the original to the contact glass regardless of the thickness of the original, and prevent the external light from entering the inside of the apparatus body and preventing the exposure as much as possible. Is something that can be done.

  As described above, when the original cover 12 is rotated in the closing direction and approaches the contact glass, both side surfaces of the rotation control unit 9 are in sliding contact with both side walls of the engagement groove 71, and a large friction torque is generated. The rotational speed of the original cover 12 is reduced, and the original cover 12 does not collide with the contact glass vigorously. Further, when the original cover 12 is rotated in the opening direction from the closed state, the original cover 12 is lifted slightly by hand and the hand is moved away from the original cover 12 with some beat. However, since both sides of the rotation control unit 9 are in sliding contact with both side walls of the engaging groove 71 and friction torque is generated, there is a risk that the original cover 12 will strike the contact glass vigorously when the hand is released. Absent.

  Further, the rotation control unit 9 is formed by gradually widening the width of the insertion convex piece 81, so that a large friction torque is not suddenly generated during the rotation of the original cover 12 and the friction torque gradually increases. Therefore, the operation feeling during the opening / closing operation of the original cover 12 is improved.

  Therefore, the document pressure plate opening / closing device 1 and the office equipment 10 according to the present invention can be used with ease because the structure is simple and the manufacturing cost is not high, the brake function can be exhibited inexpensively, and the operation feeling can be improved. The office equipment 10 can be used.

  In the above-described embodiment, the rotation control unit 9 is provided on the insertion convex portion 8 (insertion convex piece 81). However, the present invention is not limited to this, and as shown in FIG. 72). The rotation control portion 91 in the second embodiment is formed so that the width of the side portion of the engagement groove portion 72 is gradually narrowed, for example, approximately the same as or slightly narrower than the width of the insertion convex piece 82 (see FIG. 7). It is preferable. In addition, the insertion convex piece 82 is formed in substantially the same width as shown in FIG. As a result, when the support member 3 is rotated relative to the mounting member 2 in the same manner as when the rotation control unit 91 is provided on the insertion convex portion 8 (insertion convex piece 81), a large friction torque is generated during the rotation. Thus, the opening / closing operation of the original cover 12 can be controlled, the manufacturing cost is not increased with a simple structure, the brake function can be exhibited at a low cost, and the operation feeling can be improved. Further, although not shown, the shape of the fitting recess (engagement groove) can be formed in a wedge shape in the depth direction of the cam member 6 or the slider 5 in which the fitting recess (engagement groove) is provided. In short, it is sufficient that a braking action is generated between the insertion convex portion (insertion convex piece) and the fitting concave portion (engagement groove portion) in accordance with the opening / closing operation of the original cover.

  Moreover, although the rotation control part 9 was provided in one place of the insertion convex piece 81, it is not limited to this, You may make it provide in two or more places. In the third embodiment, for example, as shown in FIG. 8, two rotation control units 9 may be provided. As a result, it is possible to control the opening / closing operation of the original cover 12 by generating a large friction torque at two locations during the rotation of the original cover 12.

  Moreover, although one set of the fitting recessed part 7 and the insertion convex part 8 was provided, it is not limited to this, You may make it provide two or more sets. In the fourth embodiment, for example, as shown in FIG. 9, the cam member 6 is provided with two insertion convex pieces 81 having the rotation control section 9, and as shown in FIG. You may make it provide the fitting recessed part 7 (engagement groove part 71) in two places of the slider 5 which opposes. As a result, when the support member 3 is rotated with respect to the attachment member 2, a large friction torque is generated in the two fitting recesses 7 and the insertion protrusions 8 during the rotation, thereby opening and closing the document crimping plate 12. It can be reliably controlled, has a simple structure, does not increase the manufacturing cost, exhibits a brake function at low cost, and can improve the operational feeling.

  Moreover, although the case where the document crimping plate opening / closing device 1 is attached to the apparatus main body 11 by the leg portion 25 has been described, the present invention is not limited to this. In the fifth embodiment, for example, as shown in FIG. 11, the attachment member 102 is detachably attached to the apparatus main body, and the direction orthogonal to the bottom plate 121 from both side ends of the bottom plate 121. You may mainly comprise from the both-sides plate 122 which extends (rises up) (it includes a direction substantially orthogonal) and opposes each other, and the cam member 106 provided between the both-sides plate 122. In this case, a lift member 104 may be provided.

  That is, the cam member 106 includes the insertion convex portion 8 (insertion convex piece 81) having the rotation control unit 9, and is provided between the side plates 122 by the mounting pins 115, for example. A hinge pin 116 is provided through the side plates 122 and the cam member 106. A support member 103 is attached to the attachment member 102 so as to be rotatable about a hinge pin 116. In the support member 103, two first sliders 108 and a second slider 105 having a fitting recess 7 (engagement groove 71) having substantially the same structure as the slider 5 are housed. Between the first slider 108 and the second slider 105, a compression spring 117a, which is an elastic member 117 that biases the document pressing plate 12 in the opening direction, that is, biases it in the opening direction, is accommodated. A lift member 104 is supported by the support member 103 so as to overlap the support member 103 and to be rotatable about a lift pin 118 on the free end side of the support member 103. The lift member 104 is attached to the original cover 12. The lift member 104 is provided with an operating pin 119, and the first slider 108 comes into contact with the operating pin 119 so that the original can be stably adhered to the contact glass regardless of the thickness of the original. Furthermore, it is possible to prevent external light from entering the inside of the apparatus main body and preventing exposure from being disturbed as much as possible. Even if it comprises in this way, a manufacturing cost does not become high with a simple structure, a brake function is exhibited at low cost, and the operation feeling can also be made favorable.

  Further, the leg portion may be formed in a cylindrical shape, and the slider may be accommodated in the leg portion. In the sixth embodiment, that is, as shown in FIG. 12, the leg portion 205 protrudes downward from the attachment member 202. The leg portion 205 is formed of, for example, a synthetic resin or the like in a substantially rectangular cylindrical shape with a lower end portion (bottom portion) 205a closed, that is, a bottomed cylindrical shape. A compression spring 206 that is an elastic member is accommodated in the leg portion 205. A slider 204 is slidably accommodated in the leg portion 205. A support member 203 is pivotally connected to the mounting member 202 with a hinge pin 216 as an axis. A cam member 207 is provided on the support member 203, and the slider 204 is pressed against the cam member 207. A reinforcing frame 209 is provided between the leg 205 and the slider 204.

  The engagement groove 211 that is a fitting recess may be provided in both the cam member 207 and the slider 204, but is provided in either the cam member 207 or the slider 204, for example, the slider 204. The insertion convex piece 212 that is an insertion convex portion may be provided on both the cam member 207 and the slider 204, but is provided on the other of the cam member 207 and the slider 204, for example, the cam member 207. The rotation control unit 213 is provided on the insertion convex piece 212, for example. Even if it comprises in this way, a manufacturing cost does not become high with a simple structure, a brake function is exhibited at low cost, and the operation feeling can also be made favorable.

  Further, the rotation control unit 9 may be provided at the bottom of the fitting recess 7 (engagement groove 302). As shown in FIGS. 13 and 14, the rotation control unit 301 in the seventh embodiment projects a part of the bottom of the engagement groove 302, for example, projects the surface in the sliding contact direction into a curved surface. It is preferable to form them. In addition, the engagement groove 302 may be provided in the cam member 311, and the engagement groove 302 is formed, for example, at a substantially central portion in the width direction of the cam member 311 in the height direction (sliding direction) from the upper surface to the front surface. Are formed in a slit shape having a concave cross section. As shown in FIG. 15, the insertion convex portion 303 protrudes from the sliding portion 314 of the slider 312, for example. The width of the insertion convex portion 303 is smaller than the width of the engagement groove portion 302, for example, slightly narrower. The surface of the insertion protrusion 303 in the sliding direction is preferably formed in a curved surface shape. The protruding shapes of the insertion convex portion 303 and the rotation control portion 301 are formed so that the rotational torque becomes maximum when the opening angle is about 5 °, for example.

  Further, as shown in FIGS. 13 to 15, the sliding portion 314 of the cam member 311 and the slider 312 is formed between the mounting member 305 and the supporting member 3 when the supporting member 3 is rotated with respect to the mounting member 305. As shown in FIG. 1, it is preferable to form a cam shape in which the document pressing plate 12 is stopped at a free stop with respect to the apparatus main body 11 by generating a friction torque therebetween. The cam member 311 has, for example, an upper surface, a front surface, and corners thereof formed in a curved surface shape, and the sliding portion 314 has a surface formed in a curved surface shape. That is, the cam member 311 and the sliding portion 314 of the slider 312 rotate the document crimping plate 12 around the hinge pin 16 in the opening direction, so that the document crimping plate 12 gradually rises and the document crimping plate 12 is closed by its own weight. When the compression spring 17a is extended in response to this operation and its urging force is weakened, the original pressure plate 12 does not jump up and slides on each other. It is preferable that the original press plate 12 be formed in a shape that allows the apparatus main body 11 to be free-stopped by the generated friction torque.

  Even if comprised in this way, there exists an effect similar to the above. That is, the original cover 12 is in close contact with the contact glass of the device main body 11 so as to cover the contact glass when the device main body 11 is not used. In order to place a document on the contact glass, first, the document crimping plate 12 is held by holding the end of the document crimping plate 12 on the side opposite to the portion where the document crimping plate opening / closing device 300 is attached or in the vicinity thereof. Lift up. That is, the original cover 12 is rotated about the hinge pin 16 to expose the upper surface of the contact glass to the outside, and the original cover 12 is positioned at the open position. At this time, since the restricting portion 33 of the support member 3 contacts the rotation restricting portion 23 of the attachment member 305, the original cover 12 can be positioned at the maximum opening position without being excessively opened. Further, 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 spring 17a, so that it can rotate in the opening direction without feeling weight. Further, the support member 3 (original pressure plate 12) rotates with respect to the attachment member 305 while the cam member 311 and the sliding portion 314 of the slider 312 are in sliding contact with each other. For this reason, when the rotation of the original cover 12 is stopped, the original cover 12 is held in its stopped position by the friction torque generated by the sliding contact between the cam member 311 and the sliding portion 314. Therefore, the original cover 12 can be freely stopped with respect to the device body 11.

  After placing the document on the exposed contact glass surface, the lifted document pressing plate 12 is lowered. That is, the document pressing plate 12 is rotated about the hinge pin 16 in the closing direction in contact with the contact glass and moved downward to be in the closed state. At this time, a little force is initially required to resist the urging force of the compression spring 17a, but the moment of the original pressure plate 12 is larger than the urging force of the compression spring 17a urging the original pressure plate 12 along the way. Therefore, the original cover 12 can be easily rotated. Further, the support member 3 (the original press plate 12) rotates with respect to the attachment member 305 while the cam member 311 and the sliding portion 314 are in sliding contact with each other.

  Then, when the original cover 12 further rotates and approaches the contact glass, the rotational speed of the original cover 12 tends to increase, but the rotation controller 301 starts from the state where the cam member 311 and the sliding portion 314 are in sliding contact with each other. Since they come into contact with the insertion convex portion 303 and come into sliding contact with each other on the surface, a large rotational torque (or torque change) is generated between the rotation control portion 301 and the insertion convex portion 303. For this reason, the rotation speed of the original cover 12 does not increase, but conversely decreases. As a result, the original cover 12 does not strike the contact glass vigorously. If the original placed on the contact glass is a thin object, for example, a thin sheet of paper, the original press plate 12 rotates only about the hinge pin 16 and the original press plate 12 does not lift the original from the contact glass. So that the original can be copied well.

  When the original is thick like a book, when the original pressing plate 12 is rotated in the closing direction after the original is placed on the contact glass, before the original pressing plate 12 is closed, that is, the original Before the pressure-bonding plate 12 is brought into close contact with the contact glass, the document pressure-bonding plate 12 comes into contact with the end portion of the document, and a space is formed between the end portion on the opposite side of the document and the document pressure-bonding plate 12. Is done. That is, the document crimping plate 12 is in a state where the end opposite to the document crimping plate opening / closing device 300 is lifted. By pressing the floating document pressing plate 12 toward the apparatus main body 11 or by the weight of the document pressing plate 12, the leg portion 25 moves in the direction (upward) from the mounting hole 13 to move the document pressing plate opening / closing device 300. Moves upward, and the original cover 12 rotates about the hinge pin 16 as an axis. In other words, the height of the document crimping plate opening / closing device 300 is automatically adjusted so as to cover the upper part of the document, and the document crimping plate 12 moves. For example, when the upper part of the original is a flat surface, the original cover 12 is in surface contact with the upper part. As a result, a thick original is stably adhered to the contact glass. Therefore, the original pressing plate 12 can stably adhere the original to the contact glass regardless of the thickness of the original, and prevent the external light from entering the inside of the apparatus body and preventing the exposure as much as possible. Is something that can be done.

  As described above, when the original cover 12 is rotated in the closing direction and approaches the contact glass, the rotation control unit 301 and the insertion protrusion 303 are brought into sliding contact with each other, and a large rotational torque is generated. The rotation speed is reduced, and the original cover 12 does not collide with the contact glass vigorously. Further, when the original cover 12 is rotated in the opening direction from the closed state, the original cover 12 is lifted slightly by hand and the hand is moved away from the original cover 12 with some beat. However, since the original pressing plate 12 is held in that position by the urging force of the friction and the compression spring 17a, there is no fear that the original pressing plate 12 will strike the contact glass vigorously when the original pressing plate 12 is released.

  In addition, since the surface of the rotation control unit 301 in the sliding direction is curved and is formed so that the rotational torque is maximized when the opening angle is around 5 °, Since a large rotational torque is not suddenly generated, the operation feeling during the opening / closing operation of the original cover 12 is improved.

  Therefore, the document crimping plate opening / closing device 300 and the office equipment 10 according to the seventh embodiment have a simple structure, are not expensive to manufacture, can exhibit a brake function at low cost, and can have a good operation feeling. The office equipment 10 can be used with peace of mind.

  FIG. 16 is a graph showing a correlation between the rotation moment curve of the document crimping plate and the torque curve of the document crimping plate opening / closing device, and the rotation moment curve of the document crimping plate and the torque curve of the document crimping plate opening / closing device are It intersects at a predetermined opening angle (around 17 ° in the embodiment), and above the predetermined opening angle, the rotational torque of the document pressing plate opening / closing device changes in a state exceeding the rotational moment of the document pressing plate, and the predetermined opening angle In the following, it is configured such that the rotational moment of the original cover is higher than the rotational torque of the original cover opening / closing device. As a result, the original pressing plate 12 can be opened without feeling its original weight when opened, and the original pressing plate 12 can be stopped at a free stop at an intermediate opening angle. The original cover 12 does not drop rapidly and can prevent the floating phenomenon at the time of closing. The document crimping plate opening / closing apparatus 300 according to the present invention can increase the rotational torque of the document crimping plate 12 over the rotational moment of the document crimping plate 12 in the same manner as conventionally known at the intermediate opening angle of the document crimping plate 12. It can be seen that the rotation controller can prevent the rotational torque of the original cover 12 from being rapidly attenuated below a predetermined opening angle.

  Although one rotation control unit 301 is provided at the bottom of the engagement groove 302 so that a large rotational torque is generated when the original cover 12 is positioned near the upper surface of the apparatus main body 11, it is not limited to this. The rotation control unit may be provided so that a large rotation torque is generated when the document pressing plate 12 is positioned in the vicinity of the upright state with respect to the apparatus main body 11, or a plurality of rotation control units may be provided. For example, when a plurality of rotation control units are provided, a large rotation occurs when the document crimping plate 12 is positioned near the upper surface of the device main body 11 and when the document crimping plate 12 is positioned near the device main body 11 in an upright state. You may make it provide two rotation control parts so that a torque may each generate | occur | produce. In addition, the rotation control unit is provided at the bottom of the engagement groove and at the side of the engagement groove. For example, when the document crimping plate 12 is positioned near the upper surface of the device main body 11 and when the document crimping plate 12 is located in the device main body 11. On the other hand, a large rotational torque and friction torque may be generated respectively when positioned near the upright state.

  As described above, the document crimping plate opening / closing apparatus according to the present invention is provided with the fitting recess in one of the slider and the cam member, and the insertion protrusion that fits the fitting recess in the other of the slider and the cam member. When the support member is rotated with respect to the mounting member by providing a rotation control unit in at least one of the fitting concave portion and the insertion convex portion, a large friction torque is generated during the rotation to It is configured to control the opening / closing operation, or one of the slider and the cam member is provided with a fitting concave portion, and the other one of the slider and the cam member is provided with an insertion convex portion to be fitted with the fitting concave portion, Since a rotation control unit is provided in the fitting recess and the support member is rotated with respect to the attachment member, a large rotational torque is generated during the rotation to control the opening / closing operation of the original cover. Because it exhibits a braking function with a simple configuration that does not increase the production cost, and has a good operation feeling, it is particularly suitable for use as a document pressure plate opening / closing device for office machines such as copiers, printers, facsimiles, and scanners. It is.

1 is a schematic side view showing a state where an original cover is closed in an example of office equipment provided with an original cover according to the present invention. FIG. 1A and 1B are views showing an example of a document crimping plate opening and closing device according to the present invention, in which FIG. 1A is a side view in a closed state, FIG. 1B is a perspective view in an opened state, and FIG. FIG. 2A and 2B are cross-sectional views illustrating an example of a document pressing plate opening and closing device according to the present invention, in which FIG. 1A is a diagram illustrating a closed state, and FIG. It is a figure which shows an example of the attachment member which concerns on this invention, (a) is a perspective view, (b) is a front view. It is a perspective view which shows an example of the slider which concerns on this invention. It is a front view which shows an example of the slider in 2nd Embodiment. It is a front view which shows an example of the attachment member in 2nd Embodiment. It is a perspective view which shows an example of the attachment member in 3rd Embodiment. It is a front view which shows an example of the attachment member in 4th Embodiment. It is a front view which shows an example of the slider in 4th Embodiment. It is a schematic sectional drawing which shows an example of the original document crimping plate opening / closing apparatus in 5th Embodiment. It is a schematic sectional drawing which shows an example of the original document crimping plate opening / closing apparatus in 6th Embodiment. It is a perspective view which shows an example of the original document crimping plate opening / closing apparatus in 7th Embodiment. It is a figure which shows an example of the attachment member in 7th Embodiment, (a) is a perspective view, (b) is a front view, (c) is AA arrow sectional drawing in the (b) figure. is there. It is a figure which shows an example of the slider in 7th Embodiment, (a) And (b) is a perspective view, (c) is a front view, (d) is a side view. is there. It is a graph which shows the correlation of the moment curve and torque curve of the original document crimping plate opening / closing apparatus in 7th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Document pressing plate opening / closing device 2 Mounting member 3 Support member 5 Slider 6 Cam member 7 Fitting recessed part 8 Insertion convex part 9 Rotation control part 10 Office equipment 11 Equipment main body 12 Document pressing board 13 Mounting hole 16 Hinge pin 17 Elastic member 23 Rotation restriction Part 25 Leg part 33 Restriction part 71 Engagement groove part 72 Engagement groove part 81 Insertion convex piece 82 Insertion convex piece 91 Rotation control part 102 Mounting member 103 Support member 104 Lift member 106 Cam member 116 Hinge pin 121 Bottom plate 122 Side plate 204 Slider 205 Leg part 206 Compression spring (elastic member)
211 Engaging groove portion 212 Insertion convex piece 213 Rotation control portion 300 Document pressing plate opening / closing device 301 Rotation control portion 302 Engagement groove portion 303 Insertion convex portion 311 Cam member 312 Slider 314 Sliding portion

Claims (13)

An attachment member attached to the apparatus main body side of an office machine having a document crimping plate, a support member rotatably attached to the attachment member and supporting the document crimping plate, and any one of the support member and the attachment member A slider that is slidably mounted on one member, a cam member that is in sliding contact with the slider, and that is provided on the other of the support member and the mounting member, and the slider and the slider are accommodated. A document crimping plate opening / closing device provided with an elastic member provided between the support member or the mounting member and controlling the opening operation of the document crimping plate by pressing the slider against the cam member;
One of the slider and the cam member is provided with a fitting concave portion, and the other one of the slider and the cam member is provided with an insertion convex portion for fitting with the fitting concave portion, When a rotation control unit is provided on at least one of the insertion projections and the support member is rotated with respect to the mounting member, a large friction torque is generated during the rotation to control the opening / closing operation of the original cover. A document crimping plate opening and closing device, characterized by being configured as described above.   The fitting recess is a slit-like engagement groove that extends in the sliding direction of the slider, and the insertion convex portion is an engagement convex piece that extends and projects in the sliding direction of the slider. 2. The document crimping plate opening / closing apparatus according to claim 1, wherein the rotation control unit is formed by widening a part of the convex piece.   The fitting recess is a slit-like engagement groove extending in the sliding direction of the slider, and the rotation control part is formed by narrowing a part of both sides of the engagement groove. The document crimping plate opening and closing device according to claim 1 or 2.   The fitting recess is a slit-shaped engagement groove portion having a slit-like cross section extending in the sliding direction of the slider, and the rotation control portion is formed by projecting a part of the bottom portion of the engagement groove portion. The document crimping plate opening and closing device according to any one of claims 1 to 3.   The document crimping plate opening / closing apparatus according to claim 1, wherein one or more of the fitting recess and the insertion protrusion are provided.   The slider and the cam member generate a friction torque between the attachment member and the support member when the support member is rotated with respect to the attachment member, so that the original pressure plate is attached to the apparatus body. The document crimping plate opening and closing device according to any one of claims 1 to 5, wherein the document crimping plate opening and closing device is formed in a cam shape to be stopped by a free stop.   The rotation control unit is provided so that a large friction torque is generated when the document crimping plate is positioned near the upper surface of the device body and / or when the document crimping plate is positioned near the device body. The document crimping plate opening and closing device according to claim 1, wherein the document crimping plate opening and closing device is provided.   The attachment member has a bottom plate attached to the upper surface of the apparatus main body and both side plates raised from both side portions of the bottom plate, and the support member is rotatably attached to the both side plates via hinge pins. The document crimping plate opening and closing device according to claim 1, wherein the cam member is attached between the both side plates.   9. The original cover according to claim 1, wherein the attachment member includes a leg portion that is inserted into an attachment hole provided in the vertical direction in the device main body so as to be movable up and down. Switchgear.   The document crimping plate opening and closing according to claim 9, wherein the leg portion is formed in a cylindrical shape, and is provided with an internal elastic member that slides and urges the slider in one direction. apparatus.   A lift member is attached to the free end side of the support member so that the lift member can be rotated in a direction different from the rotation direction of the support member, and the original cover is attached to the lift member. The document crimping plate opening and closing device according to claim 1, wherein:   The mounting member includes a base portion having a rotation restricting portion on an upper end side of the leg portion, and the support member has a restricting portion that comes into contact with the rotation restricting portion. The document crimping plate opening and closing device described.   An office machine equipped with a manuscript crimping plate, comprising the manuscript crimping plate opening and closing device according to any one of claims 1 to 12.

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