JP2014115664A - Manuscript pressing plate opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manuscript pressing plate opening and closing device simplified in structure by reducing the extra number of component parts and capable of being manufactured at a moderate cost.SOLUTION: The manuscript pressing plate opening and closing device is constituted by a mounting member 7 having a cylindrically shaped mounting leg part 6; a support member 10 turnably mounted on both side plate parts 8, 8 provided on this mounting member through a hinge pin 9; a roller 12 turnably mounted on a rocking part 11 of this support member; elastic means 14 stored in a storage hole 13 provided in the axial direction of the central part of the mounting leg part of the mounting member and composed of a compression coil spring elastically provided between a bottom part 13a and the roller; and a cylindrically shaped spring guide 15 fitted by covering the outside of the upper end part side of this elastic means 14.

Description

  The present invention relates to a document pressure plate opening / closing device suitable for opening and closing a document pressure plate of a printer, a scanner, a printing machine, or a copying machine.

  Conventionally, as an opening / closing device for a document pressure plate of a copying machine, even if a document pressure plate opening / closing device, commonly referred to as a bar hinge, is provided with a document pressure plate without an automatic document feeder, or with an automatic document feeder. It is widely used as an opening / closing device for a relatively light weight original cover.

  Such a document crimping plate opening / closing device hangs a mounting leg from a mounting member that is mounted on the apparatus main body side, and this mounting leg is removably inserted into a mounting hole provided in the vertical direction on the apparatus main body, The crimping plate can be attached to and removed from the main unit together with the original crimping plate opening and closing device. In addition, when the original is a thick original such as a book, the mounting leg slides up and down in the mounting hole. The upper surface of the thick original can be covered with the pressure plate in a horizontal state.

  As such a document crimping plate opening / closing device referred to as a so-called bar hinge, for example, one disclosed in Patent Document 1 below is known. The document crimping plate opening / closing device described in Patent Document 1 is provided on the upper end side of a cylindrical mounting leg portion that also serves as an attachment member that is detachably inserted into an attachment hole provided in the vertical direction at the upper end of the rear portion of the apparatus body. A support member attached to the rear part of the original crimping plate is rotatably attached via a hinge pin. A compression coil spring is accommodated inside the attachment leg, and the support member is placed at a position facing the compression coil spring. A cam portion is provided, a slider is provided between the cam portion and the compression coil spring, and the cam portion of the support member is in contact with the slider.

JP 2001-98839 A

  In recent years, the cost of copying machines has been further reduced, and there is a need to reduce costs by reducing the number of parts even in the conventional document crimping plate opening and closing device known as a bar hinge. It has been. In addition, there is a need for a significant cost reduction even for office automation equipment such as printers, scanners, and printing machines that have a document pressure plate, and there is a need for a simpler document pressure plate open / close device that eliminates the number of parts. Yes.

  The present invention has been made in consideration of the above circumstances, and its purpose is to provide a manuscript crimping plate opening and closing device that can be manufactured at a lower cost by reducing the number of extra parts and simplifying the configuration. It is in.

  In order to achieve the above-mentioned problems, the present invention comprises a cylindrical mounting leg provided with an accommodation hole in the central axial direction thereof, and a mounting part provided on the top of the mounting leg. A mounting member that is inserted and fixed in a mounting hole provided in the main body of a copying machine or the like, and a support portion and a swinging portion, and the support portion can be rotated inside a both side plate portion provided in the mounting portion via a hinge pin. A support member attached to the support member, and one end portion of the support member attached to the swinging portion, and the other end side of the support member is accommodated in the accommodation hole of the attachment leg portion, and the attachment leg portion A rotation control means that is provided between the two ends of the rotation control means. One end of the rotation control means is engaged with an engagement hole provided below the insertion hole of the hinge pin in the swinging portion, and the other end. The torsion coil spring is in contact with the inner bottom of the receiving hole so that the original cover is opened. Sometimes, the torsion coil spring urges the original pressure plate in the closing direction when the original pressure plate is closed, and the predetermined time when the original pressure plate is opened. The original pressing plate is urged to rotate in the opening direction through the swinging portion from the opening angle, and the urging in the opening direction is maintained at a predetermined opening angle.

  In this case, the present invention is configured such that the rotation control means is engaged with an arcuate engagement elongated hole provided at one end portion of the swinging portion below the insertion hole of the hinge pin, and the other end portion of the rotation control means. The tension coil spring is locked to the inner bottom portion of the receiving hole, and the tension coil spring is closed by closing the document crimping plate by the latching long hole that pivots around the hinge pin when the document crimping plate is opened and closed. It is characterized in that it is urged in the closing direction at the time of composition, and urged in the opening direction at the time of opening the original cover.

  In each of the inventions according to claim 1, the document crimping plate opening / closing device includes a cylindrical mounting leg provided with a collection hole in the central axial direction thereof and a mounting part provided on the upper part of the mounting leg. Comprising a mounting member for inserting and fixing the mounting leg portion into a mounting hole provided in a main body of a copying machine or the like, a support portion and a sliding portion, and the support portion inside the side plate portions provided in the mounting portion. A support member that is rotatably attached via a hinge pin, and one end of the support member is attached to the swinging portion of the support member, and the other end is placed in the receiving hole of the mounting leg. In addition, the rotation control means is provided between the mounting leg portion and the rotation control means. In the invention of claim 1, the rotation control means is provided at one end portion of the swinging portion with the insertion hole of the hinge pin. The torsion coiler is engaged with an engaging hole provided below the other end and abutted with the inner bottom of the receiving hole. The torsion coil spring urges the original pressure-bonding plate in the closing direction when the original pressure-bonding plate is closed by the insertion hole that turns around the hinge pin as a fulcrum when the original-pressure plate is opened and closed. When the document pressing plate is opened, the document pressing plate is rotated and biased from the predetermined opening angle in the opening direction via the swinging portion, and the biasing in the opening direction is maintained at the predetermined opening angle. According to a second aspect of the present invention, the rotation control means is locked to an arcuate locking slot provided at one end portion of the swinging portion at a position below the insertion hole of the hinge pin. And the other end portion is a tension coil spring that is locked to the inner bottom portion of the housing hole, and the tension coil spring is rotated by the locking elongated hole that pivots about the hinge pin when the original cover is opened and closed. The original pressure plate Since it is urged in the closing direction when closing, and urged in the opening direction when opening the original pressure plate, the original pressure plate can be closed to the main body with a simpler configuration with fewer parts. The original crimping plate can be prevented from being lifted in the completed state, and can be stably stopped and held without falling naturally in the fully opened state of the original crimping plate with respect to the apparatus main body. We were able to provide a device.

1 is a perspective view of a copying machine using a document crimping plate opening / closing device according to the present invention. 1 is a partial cross-sectional side view of a copying machine showing a state in which a document crimping plate opening / closing device according to the present invention is attached to a copying machine. FIG. 3 is a side view of the document crimping plate opening / closing device according to the present invention. FIG. 3 is an exploded perspective view of a document crimping plate opening / closing device according to the present invention. FIG. 3 is a side sectional view of the document crimping plate opening / closing device according to the present invention. It is a sectional side view for demonstrating operation | movement of the original document crimping plate opening / closing apparatus which concerns on this invention. It is a sectional side view for demonstrating operation | movement of the original document crimping plate opening / closing apparatus which concerns on this invention. It is a disassembled perspective view which shows the other Example of the original document crimping plate opening / closing apparatus which concerns on this invention. FIG. 9 is a side sectional view for explaining the operation of the document crimping plate opening / closing apparatus according to the present invention shown in FIG. 8. It is a disassembled perspective view which shows the further another Example of the original document crimping plate opening / closing apparatus which concerns on this invention. FIG. 11 is a side sectional view for explaining the operation of the document crimping plate opening / closing apparatus according to the present invention shown in FIG. 10. It is a disassembled perspective view which shows the further another Example of the original document crimping plate opening / closing apparatus which concerns on this invention. FIG. 13 is a side sectional view for explaining the operation of the document crimping plate opening / closing apparatus according to the present invention shown in FIG. 12. FIG. 13 is a side sectional view for explaining the operation of the document crimping plate opening / closing apparatus according to the present invention shown in FIG. 12.

  An embodiment according to the present invention will be described below as a document crimping plate opening / closing device of a copying machine. The document crimping plate opening / closing device according to the present invention can also be used for OA devices such as printers, scanners and printing machines other than copying machines. This can be carried out as it is, with only minor design changes taking into account the weight, function and structure of the crimping plate. Further, the present invention can be implemented as it is as an opening / closing device for an opening / closing body other than the original pressing plate (for example, a cover of an ink cartridge housing portion). In this case, the original cover is replaced with an opening / closing body or a cover. The apparatus main body applies to all of a copying machine, a printer, a scanner, or a printing machine using the opening / closing device according to the present invention.

  In FIG. 1 and FIG. 2, what is indicated by an instruction symbol 1 is a copier which is also called an image forming apparatus, for example. The copying machine 1 includes an apparatus main body 2 and a document crimping plate 3. The document crimping plate opening / closing apparatus according to the present invention is used to crimp a document (not shown) onto a contact glass 4 on the apparatus main body 2. In particular, as shown in FIGS. 1 and 2, the rear portion 5 of the original cover 3 is connected to the upper end of the rear portion of the apparatus body 2 so as to be openable and closable. (A in FIG. 1) Note that the original cover 3 is of two types, not shown, but with a known automatic document feeder, and the other with no automatic open / close of the original cover according to the present invention. The device can be applied to either document crimping plate, but preferably it is not equipped with an automatic document feeder, and is a light document crimping plate configured to handle thick documents such as folding itself. Opening and closing device.

  As shown in FIGS. 3 to 7, the document pressing plate opening / closing device 5 includes a mounting member 7 having a mounting leg portion 6 having a cylindrical shape, and both side plate portions 8 provided on the top of the mounting member 7, 8, a support member 10 rotatably attached to the support member 10 via a hinge pin 9, a roller 12 rotatably attached to the swinging portion 11 of the support member 10, and a central shaft of the attachment leg portion 6 of the attachment member 7. The elastic means 14 made of, for example, a compression coil spring, which is received in the receiving hole 13 provided in the direction and is elastically provided between the bottom 13 a and the roller 12, and the outer side of the upper end side of the elastic means 14 are covered. And a cylindrical spring guide 15 fitted thereto.

  The mounting member 7 is formed of a synthetic resin material such as P0M (polyacetal), for example, and includes a mounting leg 6 provided with a receiving hole 13 with a bottom 13a in the center axis direction, and the mounting leg 6 It is comprised by the support member accommodating part 7a which exhibited the planar angle | corner shape which has a pair of both-sides board parts 8 and 8 provided in the upper part and opposingly spaced. The mounting member 7 also has a stepped square shape as a whole, and the receiving hole 13 that communicates with the support member housing portion 7a and is provided in the axial direction of the central portion of the mounting leg portion 6 has a circular cross section. ing. The receiving hole 13 has a boss portion 13b at the bottom portion 13a, and the boss portion 13b is fitted in the bottom portion side of the elastic means 14, as shown in FIG. The support member housing portion 7a of the attachment member 7 is provided with connecting holes 7b and 7b through which the hinge pins 9 are inserted. As described above, the mounting leg 6 is stepped and does not have a lift function. Therefore, the length of the mounting leg 6 is shorter than that of a conventionally known one, and the mounting piece 6a has a mounting hole 6b on the upper end side. Is provided. The support member housing portion 7a of the attachment member 7 is provided with a closing portion 8a that shares one end of each of the side plate portions 8, 8.

  As shown in FIG. 4, the hinge pin 9 has a flange portion 9 a and is made of a carbon steel wire having a header processed. The support portion 10 b of the support member 10 is connected to both sides of the support member receiving portion 7 a of the mounting member 7. After being connected to the plate portions 8 and 8 so as to be rotatable, the end portions thereof are caulked so that the friction torque is generated by caulking between the mounting member 7 and the support member 10 as will be described later. The attachment member 7 and the support member 10 are connected.

  The support member 10 is formed by molding a synthetic resin material such as P0M (polyacetal), for example, and is provided with a support portion 10b on one side and a swinging portion 11 on the other side with a connection hole 10a of the hinge pin 9 interposed therebetween. . Boss portions 10c and 10c (only one is shown) having a circular cross section are provided around the connecting holes 10a on both sides of the support member 10. A roller accommodating portion 11a having a semicircular cross section is provided on the rocking tip side of the oscillating portion 11, and a semicircular engaging portion having a smaller diameter than the roller accommodating portion 11a at both end portions of the roller accommodating portion 11a. Roller engagement pieces 11c and 11c provided with 11b and 11b are provided. The support portion 10b is provided with engagement groove portions 10d and 10e for attaching the rear end portion of the original cover 3 and screw holes 10f for attachment screws. Further, a stopper portion 10g is provided on the rear end side of the support portion 10b.

  The roller 12 has a round bar shape made of, for example, free-cutting steel, and has engaging portions 12b and 12b having smaller diameters than the central portion 12a at both ends thereof, and the central portion 12a enters the roller accommodating portion 11a. While being accommodated, the engaging portions 12b and 12b are fitted into the semi-circular engaging portions 11b and 11b of the roller engaging pieces 11c and 11c, whereby the roller 12 is rotatable but is restricted from moving left and right. Has been made. Although it is desirable that the roller 12 rotates, the roller 12 may be configured so that lubricity is promoted by applying lubricating grease to the contact surface with the spring guide 15 without rotating.

  The compression coil spring constituting the elastic means 14 is made of SWP-B having a known configuration, and its elasticity can be adjusted according to the weight and the center of gravity of the original cover 3.

  The spring guide 15 has a cylindrical shape made of, for example, a stainless steel material, and has a peripheral wall portion 15a and an upper surface portion 15b, and is covered like a cap on the upper end portion of the elastic means 14.

  In the first embodiment, the rotation control means 17 is opposed to the elastic means 14 formed of a compression coil spring accommodated in the accommodation hole 13 of the mounting leg 6 and the elastic means 14. The roller 12 is provided on the support member 10, and a cylindrical spring guide 15 is attached between the roller 12 and the elastic means 14 so as to cover the elastic means 14.

  Therefore, the elastic means 14 is accommodated in the receiving hole 13 provided in the mounting leg 6, the spring guide 15 is covered on the upper end portion of the elastic means 14, and the roller accommodating portion 11 a provided in the swinging portion 11 of the support member 10. In the state where the central portion of the roller 12 is accommodated and the engaging portions 12b and 12b are fitted into the semicircular engaging portions 11b and 11b, the swinging portion 11 is inserted and pushed into the support member accommodating portion 7a. After aligning the connecting holes 7b and 7b with the connecting hole 10a, the hinge pins 9 are inserted and connected to the connecting holes 7b, 7b and 10a, and then the ends of the hinge pins 9 are caulked, whereby the original pressure plate The assembly of the opening / closing device 5 is completed. At this time, it is possible to arbitrarily create a friction torque between the boss portions 10c and 10c and the inner wall of the support member accommodating portion 7a, and the friction torque can be reduced by interposing another friction member. You may comprise so that it may be created. Moreover, you may comprise so that this friction torque may not be created.

  As shown in FIG. 1, the document crimping plate opening / closing device 5 according to the present invention assembled as described above is normally used in a pair, and the rear end portion of the support member 10 is attached to the lower surface of the rear end portion of the document crimping plate 3. 2, the mounting leg 6 of the mounting member 7 is inserted into the mounting holes 2a and 2a (only one is shown) provided at the upper rear end of the apparatus body 2, and the mounting piece 6a is fixed to the mounting screw. By fixing with screws 16, the original cover 3 can be attached to the apparatus main body 2 so as to be openable and closable.

  Next, the operation of the document crimping plate opening / closing device 5 according to the present invention will be described. When the document crimping plate 3 is attached to the apparatus main body 2 and the document crimping plate 3 is closed as described above, the rotation control means 17 As shown in FIG. 5, the roller 12 is located on one side of the spring guide 15 and urges the support member 10 to rotate in the direction in which the original cover 3 is closed by the elastic force of the elastic means 14. Therefore, the original cover 3 is pressed onto the contact glass 4 by its own weight and the elasticity of the elastic means 14. However, here, the effective length may be determined so that the elastic force of the elastic means 14 does not act on the roller 12. In this case, the original cover 3 is kept closed only by its own weight.

  When the original cover 3 is opened in order to place the original on the contact glass 4 from the closed state of the original cover 3, it is swung by the support member 10 that rotates together with the hinge pin 9 as a fulcrum. The roller 12 constituting the rotation control means 17 of the section 11 pushes the elastic means 14 slightly through the spring guide 15 and slides on the upper surface thereof, and moves as shown in FIG. Since the central action line of the elastic means 14 and the straight line connecting the centers of the hinge pin 9 and the roller 12 become parallel when the opening angle of the glass 4, that is, the apparatus main body 2 is approximately 8 °, the support member 10 is It is in a state where it is not biased in either direction. When the original cover 3 is further opened, the urging direction by the elastic means 14 is reversed and this time, the original cover 3 is urged in the opening direction, and as shown in FIG. 7, the stopper portion 10g of the support portion 10b. Is opened until it comes into contact with the closing portion 8a of the mounting member 7. The opening angle of 8 ° is not limited. Thereafter, the opened original cover 3 is urged in the opening direction, so that the original cover 3 is kept open without being naturally dropped in the closing direction. The opening angle is approximately 50 ° in the example, but there is no limitation on the opening angle.

  Next, when the opened original cover 3 is closed, resistance is encountered when the elastic means 14 is pushed through the roller 12 up to a closing angle of approximately 8 °. After the straight line connecting the centers of the rollers 12 and the action center line of the elastic means 14 become parallel, the elastic means 14 exerts an elastic force that pushes the rollers 12 in the direction to close the upper document pressing plate 3, thereby pressing the documents. The plate 3 is automatically closed by its own weight and the urging force of the elastic means 14.

  As described above, the document crimping plate opening / closing device 5 according to the first embodiment has the document crimping plate 3 in the closed state of the document crimping plate 3 by the rotation control unit 17 through the rotation control of the support member 10. Therefore, the original pressure-bonding plate 3 is urged in the opening direction from a predetermined opening / closing angle to stably support the original pressure-bonding plate 3 at the full opening angle. In addition, when the document crimping plate 3 is closed, the document crimping plate 3 can be controlled so as not to close suddenly. Also, the provision of the roller 12 has an effect of improving the sliding between the swinging portion 11 and the spring guide 15 during the opening / closing operation of the light weight original cover 3 and smoothing the opening / closing operation.

  8 and 9 show still another embodiment of the document crimping plate opening / closing device according to the present invention. The original pressure plate opening / closing device 20 according to the second embodiment is the same as the first embodiment except for the configuration of the spring guide 23 that covers the elastic means 22 that is a compression coil spring that constitutes the rotation control means 21. The spring guide 23 according to the second embodiment has a cylindrical body portion 23a having a cylindrical shape made of SUS and a flange portion 23b at the upper end of the main body portion 23a. The outer diameter of the main body portion 23a is elastic. In accordance with the inner diameter of the means 22, the main body 23 a is fitted inside the elastic means 22, and the flange 23 b is put on the upper end of the elastic means 22.

  Even if implemented in this manner, the object of the present invention can be achieved.

  10 and 11 show still another embodiment of the document crimping plate opening / closing device according to the present invention. In the document crimping plate opening / closing device 25 according to the third embodiment, the attachment member 26 is separated from the attachment leg portion 26f provided with the receiving hole 26a with the bottom portion 26c in the central axis direction and the upper portion of the attachment leg portion 26f. It is comprised by the support member accommodating part 26d which exhibited the planar square shape which has a pair of both-sides board part 26e and 26e provided facing each other. The mounting member 26 also has a stepped square shape as a whole, and the receiving hole 26a that communicates with the support member housing portion 26d and is provided in the axial direction of the central portion of the mounting leg portion 26b has a circular cross section. ing.

  As shown in FIG. 10 in particular, the hinge pin 28 is made of carbon steel wire having a flange portion 28a and header processing, and the support portion 27c of the support member 27 is arranged on both sides of the support member accommodating portion 26d of the mounting member 26. After being rotatably connected to the plate portions 26e and 26e, the end portions thereof are caulked so that the friction torque is generated by caulking between the mounting member 26 and the support member 27 as will be described later. The attachment member 26 and the support member 27 are connected.

  The support member 27 is formed by molding a synthetic resin material such as P0M (polyacetal), for example, and is provided with a support portion 27c on one side and a swinging portion 27b on the other side with a connection hole 27d of the hinge pin 28 interposed therebetween. The swinging portion 27b is provided with a locking hole 27a located below the hinge pin 28.

  The rotation control means 31 is configured by a torsion coil spring 29 that is accommodated in the accommodation hole 26 a and provided between the attachment member 26 and the support member 27. Then, one end portion 29 b of the torsion coil spring 29 is engaged with an engagement hole 27 a provided in the swinging portion 27 b of the support member 27, and the other end portion 29 a is inclined to the bottom portion 26 c provided on the attachment member 26. It is made to contact | abut to the part 26b.

  The document crimping plate opening / closing device 25 according to the third embodiment appropriately maintains the document crimping plate 30 in the closed state by appropriately selecting the torque of the torsion coil spring 29 that constitutes the rotation control means 31. The document crimping plate 30 can be prevented from being lifted up, and can be lifted from a predetermined opening angle by a click means, a cam means, a friction means, or an engagement mechanism provided between the mounting member 26 and the support member 27. It can be prevented by combining means or the like. Further, as shown in FIG. 11, a locking hole 27 a that locks one end of the torsion coil spring 29 is located on the left side of the hinge pin, and the swinging portion 27 b is closed to the original cover 30. This closed state is stably maintained by the elastic force of the torsion coil spring 29 since it is urged to rotate in the direction. When the original cover 30 is opened, although not shown, one end portion 29b of the torsion coil spring 29 moves to the left side of the hinge pin 28, so that the elasticity of the torsion coil spring 29 is increased. Thus, the original pressing plate 30 is urged to rotate from a predetermined opening angle in the opening direction, so that the opening operation can be performed without feeling too much of its weight, and when the original pressing plate 30 is fully opened, twisting is performed. The open state is maintained by the elasticity of the coil spring 29, and natural fall from the open state can be prevented.

  Even if implemented in this way, the object of the present invention can be achieved, and the number of parts can be reduced and the structure can be simplified, thereby providing a document pressing plate with a lower unit price.

  12 to 14 further show another embodiment of the document crimping plate opening / closing device according to the present invention. In the document pressing plate opening / closing device 35 according to the fourth embodiment, the mounting member 37 is formed of a synthetic resin material such as P0M (polyacetal), for example. A mounting leg portion 37c provided with 37a, and a support member housing portion 37e having a planar square shape having a pair of side plate portions 37d and 37d provided to be spaced apart from each other on the upper portion of the mounting leg portion 37c. Yes. The mounting member 37 also has a stepped square shape as a whole, and a receiving hole 37a that communicates with the support member housing portion 37e and that is provided in the axial direction of the central portion of the mounting leg portion 37c has a circular cross section. ing.

  As shown in FIG. 12, the hinge pin 36 is made of carbon steel wire having a flange portion 36a and header processing. The support portion 38c of the support member 38 is connected to both sides of the support member accommodating portion 37e of the mounting member 37. After being rotatably connected to the plate portions 37d and 37d, the end portions thereof are caulked so that the friction torque is generated by caulking between the mounting member 37 and the support member 38, as will be described later. The attachment member 37 and the support member 38 are connected.

  The support member 38 is formed by molding a synthetic resin material such as P0M (polyacetal). The support member 38 is provided with a support portion 38c on the upper side and a swinging portion 38b on the lower side with the connection holes 37f and 37f of the hinge pin 36 interposed therebetween. Is. The swinging portion 38b is further provided with a locking hole 38a having a bow shape located below the hinge pin 36.

  The rotation control means 40 is composed of a tension coil spring 39 stretched between an attachment member 37 and a support member 38 that are rotatably connected to each other by a hinge pin 36, and is accommodated in an accommodation hole 37a. is there. One end portion 39b of the tension coil spring 39 is locked in a locking hole provided in the swinging portion 38b of the support member 38a, and the other end portion 39a is locked in a locking portion 37b provided in the bottom portion of the receiving hole 37a. In the stable holding of the original cover 41 at the closed position and the open position, the one end 39b of the tension coil spring 39 moves in the locking elongated hole 38a, so that the closed position and the open position are maintained. As shown in FIGS. 13 and 14, the axial center of the other end portion 37 b of the tension coil spring coincides with the axial center of the hinge pin 36. It is to be noted that together with the locking long hole 38a, a click means, a cam means, a friction means, an engagement means or the like having a known configuration provided between the attachment member 37 and the support member 38 can be used.

  Even if implemented in this way, the object of the present invention can be achieved, and the number of parts can be reduced and the structure can be simplified, thereby providing a document pressing plate with a lower unit price.

  Since the present invention is configured as described above, it is possible to provide an inexpensive document crimping plate opening / closing device that eliminates the number of parts as much as possible, and as a device that opens and closes a relatively lightweight document crimping plate, including copying machines, printers, It can be suitably used as a document crimping plate opening / closing device for a scanner, a printing machine or the like.

DESCRIPTION OF SYMBOLS 1 Copier 2 Apparatus main body 3, 30, 41 Original pressure bonding plate 4 Contact glass 5, 20, 25, 35 Original pressure bonding plate opening / closing device 6, 26f, 37c Mounting leg 6a Mounting piece 7, 26, 37 Mounting member 7a, 26d , 38d Support member accommodating portion 7b, 26g, 37f Connection hole 8, 26e, 37d Side plate portion 8a Closure portion 9, 28, 36 Hinge pin 9a, 28a, 36a Flange portion 10, 27, 38 Support member 10a, 27d, 38d Connection Hole 10b, 27c, 38c Support part 10c Boss part 10d Engagement groove part 10e Engagement groove part 10f Screw hole 10g Stopper part 11, 27b, 38b Swing part 13, 26a, 37a Collection hole 13a Bottom part 13b Boss part 29 Twist coil spring
38a Locking long hole 39 Tension coil spring

Claims (2)

  It consists of a cylindrical mounting leg with a mounting hole in the axial direction of its central part and a mounting part provided at the top of this mounting leg. The mounting leg is attached to a mounting hole provided in the main body of an apparatus such as a copying machine. An attachment member to be inserted and fixed; a support member having a support portion and a swing portion; and a support member attached to the inside of both side plate portions provided on the attachment portion via a hinge pin so as to be rotatable. One end portion is attached to the swinging portion, and the other end side is housed in the housing hole of the mounting leg portion, and the rotation control means is elastically provided between the mounting leg portion. The rotation control means has one end engaged with an engagement hole provided on the swinging portion and positioned below the insertion hole of the hinge pin, and the other end abutted against the inner bottom of the housing hole. Before turning the hinge pin as a fulcrum when the original cover is opened and closed. Due to the insertion hole, the torsion coil spring urges the original pressure plate in the closing direction when the original pressure plate is closed, and when the original pressure plate is opened, the torsion coil spring passes through the swinging portion from a predetermined opening angle. A document crimping plate opening / closing device, wherein the document crimping plate is urged to rotate in the opening direction and is maintained at a predetermined opening angle in the opening direction.   The rotation control means is locked to an arcuate locking long hole provided at one end portion of the swinging portion at a position below the insertion hole of the hinge pin, and the other end portion is an inner bottom portion of the housing hole. Thus, the tension coil spring is attached in the closing direction when the original pressure plate is closed by the locking elongated hole that pivots about the hinge pin when the original pressure plate is opened and closed. A document crimping plate opening / closing apparatus, wherein the document crimping plate is biased in the opening direction when the document crimping plate is opened.

Images