JP5645210B2 - Document crimping plate opening and closing device - Google Patents

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. And a rotation control means provided between the support member and the attachment member, and the rotation control means is rotatably attached to the swinging portion. A compression coil spring provided to be accommodated in the accommodation hole between the roller and the attachment member, and a cylindrical shape attached to the compression coil spring between the roller and the compression coil spring. It consists of a spring guide In addition, the roller is provided with engaging portions having a smaller diameter than the central portion at both ends thereof, and the engaging portion is accommodated in the roller accommodating portion while the central portion is accommodated in the roller accommodating portion provided in the swinging portion. The roller engagement pieces formed on both sides of the roller are fitted into the semicircular engagement portions from below, so that the movement of the roller in the axial direction within the roller accommodating portion is restricted. And

  The present invention is further characterized in that the spring guide has a cylindrical shape attached to an upper end portion of the compression coil spring so as to cover an outer periphery and an upper end portion thereof.

  The present invention is further characterized in that the spring guide has a cylindrical shape having a flange portion attached to an upper end portion of the compression coil spring so as to cover the inner side and the upper end portion of the compression coil spring.

In each invention which concerns on Claims 1-3 , the attachment member which has a cylindrical attachment leg part which provided the accommodation hole of the upper open in the center part axial direction, and the both-sides board provided in the upper part of this attachment member a support member of the original cover pivotally mounted via a hinge pin in section, consists of a rotation control means provided between the supporting member and the mounting member, the rotation control means, said mounting Elastic means comprising a compression coil spring housed inside the collection hole of the leg, a roller provided on the support member facing the elastic means, and the compression between the roller and the compression coil spring A roller having a cylindrical spring guide mounted on a coil spring, and an engaging portion having a smaller diameter than the central portion at both ends of the roller, and the central portion being provided on the swinging portion. Housed in the containment section The engaging portion is inserted into each semi-circular engaging portion of the roller engaging piece formed on both side portions of the roller accommodating portion from below so that the roller moves in the axial direction in the roller accommodating portion. By restricting the movement, the number of parts can be omitted, the structure can be further simplified and the cost can be reduced, and the opening and closing operation of the original pressure bonding plate can be performed more smoothly by the roller. It is possible to provide an inexpensive original pressure plate opening / closing 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. 1 and 2, particularly, as shown in FIGS. 1 and 2, the rear part of the original cover 3 is connected to the upper end of the rear part of the apparatus main body 2 so as to be openable and closable (A in FIG. 1) . The document crimping plate 3 is of two types, that is, not shown, but having a known automatic document feeder and one that is not so. Although it can be applied to a pressure plate, it is preferably a document pressure plate opening / closing device that is not lightly equipped with an automatic document feeder and is configured so as to be able to cope with a thick document by folding itself.

  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 supporting member accommodating part 7a which exhibited the planar square shape which has a pair of both-sides board parts 8 and 8 provided facing the upper part. 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 pressing plate opening / closing device 25 according to the third embodiment, the rotation control means 31 is accommodated in the accommodation hole 26 a and is provided from a torsion coil spring provided between the attachment member 26 and the support member 27. It is comprised by the elastic means 29 which consists of. Then, one end portion 29 a of the elastic means 29 is locked to the contact portion 26 b provided on the mounting member 26, and the other end portion 29 b is locked to the locking hole 27 a provided on the support member 27.

  The document crimping plate opening / closing device 25 according to the third embodiment selects the torque of the elastic means 29, which is a torsion coil spring, which constitutes the rotation control means 31, so that the document crimping plate 30 is closed. The document pressing plate 30 can be stably maintained to prevent the document pressing plate 30 from being lifted, and the flipping-up from a predetermined opening angle is performed by a click unit, a cam unit, or a friction unit having a known configuration provided between the mounting member 26 and the support member 27. Alternatively, it can be prevented by engagement means or the like. Further, when the original pressing plate 30 is opened due to the elasticity of the elastic means 29, the opening operation can be performed without feeling too much of its weight, and the original pressing plate 30 is prevented from falling naturally from the open state. Is something that can be done.

  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 crimping plate opening / closing device 35 according to the fourth embodiment, the rotation control means 40 includes a tension coil spring stretched between an attachment member 37 and a support member 38 that are rotatably connected to each other by a hinge pin 36. It is comprised by the elastic means 39 which is comprised, and is accommodated in the accommodation hole 37a. One end portion 39 a of the elastic means 39 is locked to a locking portion 37 b provided on the inner bottom portion of the mounting member 37, and the other end portion 39 b is locked to a locking long hole 38 a of the support member 38. The document pressing plate 41 is stably held at the open position by moving the other end portion 39b of the elastic means 39 in the locking elongated hole 38a. It can also be achieved by a known click means, cam means, friction means, or engagement means provided between the support member 38 and the like.

  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 Mounting leg 6a Mounting piece 7, 26, 37 Mounting member 7a Supporting member accommodating part 7b Connection Hole 8 Both side plate part 8a Closure part 9, 28, 36 Hinge pin 9a Flange part 10, 27, 38 Support member 10a Connection hole 10b Support part 10c Boss part 10d Engagement groove part 10e Engagement groove part 10f Screw hole 10g Stopper part 11 Swing Part 11a Roller receiving part 11b Semi-circle engaging part 11c Roller engaging piece 12 Roller 13, 26a, 37a Collection hole 13a Bottom part 13b Boss part 14 Elastic means 15 Spring guide 16 Mounting screw 17, 21, 31, 40 Rotation control means

Claims (3)

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 for a manuscript crimping plate having a support portion and a swinging portion; and the support portion attached to the inside of both side plate portions provided on the attachment portion via a hinge pin. A rotation control means provided between the support member and the mounting member, and the rotation control means is mounted between the roller and the mounting member. The roller comprises a compression coil spring that is housed inside the mounting hole, and a cylindrical spring guide that is mounted on the compression coil spring between the roller and the compression coil spring. Inside at both ends A roller engaging piece formed on both sides of the roller accommodating portion while providing an engaging portion having a smaller diameter than the portion and accommodating the central portion in a roller accommodating portion provided in the swinging portion. An original document crimping plate opening and closing device , wherein the roller is restricted from moving in the axial direction in the roller accommodating portion by being fitted into each semicircular engaging portion from below .   2. The document crimping plate opening and closing device according to claim 1, wherein the spring guide has a cylindrical shape attached to an upper end portion of the compression coil spring so as to cover an outer periphery and an upper end portion thereof.   2. The document according to claim 1, wherein the spring guide has a cylindrical shape having a flange portion attached to an upper end portion of the compression coil spring so as to cover an inner side and an upper end portion of the compression coil spring. Crimp plate opening and closing device.

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