JP2016180862A - Opening-closing supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact opening-closing device that can obtain a sufficient rotational energization.SOLUTION: A base end part of a supporting member 7 having a top end (swing end) fixed to a manuscript crimp plate is rotatably connected to an attachment member 6 fixed to a device body, with a hinge shaft 70. The base end of the supporting member 7 is also connected to the respective ends of link members 92a and 92b at one side of the members. The respective ends of the link members 92a and 92b at the other side of the members and the base end of the supporting member 7 are caused to be subjected to actions of elastic forces of compression coil springs 81a and 81b so that rotational energization of the manuscript crimp plate can be obtained.SELECTED DRAWING: Figure 3

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing support device suitable for opening / closing a cover such as a document pressure plate of a copying machine.

  2. Description of the Related Art Conventionally, there is a document pressure plate that covers a contact glass of a copying machine, a scanner, a printing machine, or the like and presses a document placed on the contact glass. The original cover is supported by an opening / closing device fixed to the apparatus main body. This opening / closing device has a kind of hinge mechanism, and is configured such that a document crimping plate is pivotally supported around a hinge axis. When the document crimping plate is closed, the document crimping plate is placed on the upper surface of the apparatus body. In a state where the contact glass is pressed and opened upward, the contact glass can be exposed.

  Such an opening / closing device includes an attachment member attached to the apparatus main body, a support member that is rotatably provided on the attachment member via a hinge shaft, and that supports the original cover. A support member and an attachment member And elastic means for urging the support member in the opening direction. Since the original pressing plate is urged to rotate in the opening direction by the elastic means through the support member, when the original pressing plate is rotated in the opening direction, the original pressing force is not felt by the elasticity of the elastic means. The board can be opened.

JP 2010-282158 A

  Of the switchgears having such a configuration, a switchgear attached to the side surface of the apparatus main body is conventionally configured as shown in FIG. In this conventional opening / closing support apparatus, an upward force is applied from the spring to the document placement table side with respect to the hinge shaft that rotatably supports the document crimping plate. Therefore, there is a problem that a gap is generated between the main unit and the original cover when the original cover is opened, and the force point by the spring is located on the front side of the hinge shaft. In order to obtain a sufficient rotational bias by the spring, a large spring load must be prepared, which has been an obstacle to downsizing the opening / closing support device.

  In this invention, the position of the hinge shaft is provided on the apparatus main body side so that a gap is not generated as much as possible between the apparatus main body and the original cover. It is an object of the present invention to provide a document pressing plate opening / closing support device that can be reduced in size by providing a small one.

The present invention for solving the above problems is an opening / closing support device provided between an apparatus main body and an opening / closing lid that swings openably and closably with respect to the apparatus main body.
A hinge shaft supported on the apparatus body side;
A support member that is swingably supported by the hinge shaft and has a swing end fixed to the opening / closing lid;
In the support member, a link member having one end connected to the end opposite to the swing end with respect to the hinge shaft;
A spring receiving member connected to the other end of the link member;
And an elastic member for applying an urging force to the spring receiving member to swing the support member in a direction to open the support member via the link member.

  The present invention further includes a guide member that is fixed to the apparatus main body side and regulates a moving direction of the spring receiving member.

  The present invention is further characterized in that the guide member has an accommodating portion for accommodating the elastic member and the spring receiving member, and the spring receiving member moves in the accommodating portion.

  According to the first aspect of the present invention, since the force point of the urging force applied by the elastic member is located outside the hinge shaft, a sufficient distance between the force point and the hinge shaft can be taken. Sufficient rotation bias can be obtained with a small elastic member.

  According to the invention described in claim 2, since the moving direction of the spring receiving member is regulated by the guide member, the urging force from the elastic member can be reliably applied to the support member.

  According to the third aspect of the invention, since the elastic member and the spring receiving member are accommodated in the accommodating portion of the guide member, the parts can be unitized, and the parts can be easily handled during assembly.

1 is an overall perspective view of a copying machine. It is a fragmentary perspective view which shows the attachment state to the copying machine of the opening / closing support apparatus of this invention. It is a disassembled perspective view of the opening / closing support apparatus of this invention. It is the perspective view and sectional side view which show the operation state of the opening / closing support apparatus of this invention. It is a schematic diagram which shows the structure of this invention and the conventional structure.

  An embodiment according to the present invention will be described below as a document crimping plate opening / closing support device of a copying machine. The document crimping plate opening / closing support device according to the present invention is applied to OA equipment such as printers, scanners, printing machines, etc. other than copying machines. However, it can be carried out as it is, with only minor design changes taking into account the weight, function and structure of the original cover. Further, it can also be implemented as it is as an opening / closing support device for an opening / closing body other than the original pressure plate (for example, a cover of an ink cartridge housing portion, a toilet seat or a lid of a toilet bowl). The apparatus main body is applicable to all of a copying machine, a printer, a scanner, or a printing machine using the opening / closing support device according to the present invention.

  FIG. 1 is an overall perspective view of a copying machine, also called an image forming apparatus. In the drawing, the following description will be made assuming that the front-rear direction of the copying machine is the Y-axis direction, the left-right direction is the X-axis direction, and the vertical direction is the Z-axis direction. The copying machine 1 includes an apparatus main body 2 and a document crimping plate 3, and an opening / closing support device 5 according to the present invention that is used to crimp a document (not shown) onto a contact glass 4 on the apparatus body 2 is provided. In particular, as shown in FIG. 1, two points on the rear part of the original cover 3 are connected to the upper end of the rear part of the apparatus body 2 so as to be openable and closable. The document crimping plate 3 is of two types, that is, not shown, but with a known automatic document feeder, and one that is not, and the opening / closing support device 5 according to the present invention is either of the document crimping plates. Although it can be applied to a plate, it is preferably an open / close support device 5 for a document crimping plate that is not equipped with an automatic document feeder and is configured to be able to cope with a thick document by folding itself. .

  FIG. 2 is a perspective view showing an attachment state of the opening / closing support device 5 to the copying machine 1. The opening / closing support device 5 includes an attachment member 6 and a support member 7 supported by the attachment member 6 via a hinge shaft 70 that is a swing shaft so as to be swingable. As shown in FIG. 2, the attachment member 6 is attached to a side surface upper end portion on the back side of the apparatus main body 2, and a hinge shaft 70 is inserted through the upper end portion. The hinge shaft 70 is also inserted through the proximal end portion of the support member 7 and rotatably connects the support member 7 to the mounting member 6. The swinging end portion of the support member 7 is inserted into an attachment hole 31 formed in the rear end surface of the document crimping plate 3 and is fixed to the document crimping plate 3 in the attachment hole 31. In such a configuration, the supporting member 7 rotates about the hinge shaft 70, so that the original cover 3 covers the contact glass 4 as shown in FIG. As shown in FIG. 2 (B), it swings up and down between the state where the contact glass 4 stands and the contact glass 4 is exposed.

  FIG. 3 is an exploded perspective view of the opening / closing support device 5. The opening / closing support device 5 includes an attachment member 6, a support member 7, a guide member 8, and a link mechanism 9 that connects the support member 7 and the guide member 8. The attachment member 6 is a housing that accommodates the guide member 8 and the link mechanism 9, and includes a back surface portion 61, left and right side surface portions 62 a and 62 b connected at substantially right angles at both ends of the back surface portion 61, and the back surface portion 61. A bottom surface portion 64 connected to the lower ends of the side surface portions 62a and 62b, and a storage portion 65 defined inside by the back surface portion 61, the left and right side surface portions 62a and 62b, and the bottom surface portion 64 will be described later. The guide member 8 is stored. The guide member 8 is fixed to the mounting member 6 by fixing pins 612 and 612 that pass through a pair of holes 611 and 611 formed in the back surface portion 61.

  The side portions 62a and 62b are respectively formed with fixing portions 63a and 63b which are bent outward at the front side opening ends. The fixing portions 63a and 63b are fixed to be screwed into the back side surface of the apparatus main body 2. Screw insertion holes 631a, 631a and 631b, 631b are respectively formed.

  The side portions 62a and 62b are formed with shaft support portions 620a and 620b that support the hinge shaft 70, which is a swing shaft, at a position facing the upper end portion. In the shaft support portions 620a and 620b, shaft support holes 621a and 621b through which the hinge shaft 70 is inserted are formed. The shaft support portions 620a and 620b are provided so as to protrude slightly forward (in the negative direction in the Y axis) from the front ends of the side surface portions 62a and 62b, and the positions of the shaft support holes 621a and 621b are also on the front side of the side surface portions 62a and 62b. It is located slightly in front of the end. By supporting the hinge shaft 70 at such a position, the supporting position of the original cover 3 is moved as close as possible to the apparatus main body 2 and the rotational torque for energizing the original cover 3 is reduced. can do.

  The support member 7 is pivotally supported by the shaft support portions 620a and 620b. The support member 7 includes a plate-like attachment fixing portion 71 and a pair of shaft connection portions 72 a and 72 b configured by bending opposing positions at both ends of the attachment fixing portion 71. Three mounting holes 75a, 75b, and 75c are formed in the mounting fixing portion 71. When the mounting holes 75a, 75b, and 75c are inserted into the mounting holes 31 formed on the back end surface of the original cover 3, the mounting holes 75a, 75b, and 75c are formed. It is fastened to the original pressure plate 3 side by a screw to be inserted. Concave portions 76 and 76 for reinforcing the strength are press-formed on the rear end of the attachment fixing portion 71. The strength is also reinforced by the shaft connecting portions 72a and 72b formed by bending at both ends.

  Two holes are formed in the shaft connection portions 72a and 72b at positions facing each other. One is a bearing hole 73a, 73b through which the hinge shaft 70 is inserted, and the other is a shaft hole 74a through which a first link shaft 90 for connecting link members 92a, 92b of the link mechanism 9 described later is inserted. 74b.

  The shaft holes 74a and 74b are arranged on the opposite side of the mounting and fixing portion 71 with the bearing holes 73a and 73b as the center. The hinge shaft 70 is inserted into the bearing holes 73a and 73b via bearings 76a and 76b with rotation prevention, and the first link shaft 90 is inserted into the shaft holes 74a and 74b via bearings 93a and 93b with rotation prevention. Is inserted. In this way, the support member 7 rotates about the hinge shaft 70, and at that time, the shaft holes 74 a and 74 b swing in the direction opposite to the swing direction of the original cover 3.

  As described above, the guide member 8 is housed and fixed in the housing portion 65 of the mounting member 6. The guide member 8 includes a back plate 82 that overlaps the back surface portion 61 of the attachment member 6 on the back side, side plates 83a and 83b that are formed by bending right and left ends of the back plate 82 at right angles, and a back plate 82 and a side plate 83a. , 83b, and a top plate 84 connected to the upper end of 83b. In addition, rail portions 85a and 85b are formed on the front side edges of the side plates 83a and 83b by bending to the opposite sides (inner sides), and the opposite sides 851a and 85b of the rail portions 85a and 85b are formed. 851b is a parallel rail.

  In addition, elongated holes 86a and 86b as guide means are formed at positions facing the side plates 83a and 83b, respectively. The second link shaft 94 is inserted through the long holes 86a and 86b. A pair of compression coil springs 81a and 81b, which are elastic members, and a spring receiving member 88 as a moving member are housed in a housing portion 87 formed by the back plate 82, the side plates 83a and 83b, and the top plate 84. The compression coil springs 81 a and 81 b are inserted between the top plate 84 and the spring receiving member 88 in a compressed state. The outer method of the cross-sectional shape of the spring receiving member 88 in the XY plane is substantially the same as the inner method of the cross-sectional shape of the housing portion 87 in the XY plane. Thereby, the spring receiving member 88 is guided by the housing portion 87 so that the spring receiving member 88 can move smoothly in the housing portion 87 and can move while maintaining the posture of the member constant.

  The upper surface 884 of the spring receiving member 88 is formed with a recess that matches the cross-sectional shape of the compression coil springs 81a, 81b at the position where the compression coil spring 81b abuts, and spring receiving portions 884a, 884b are provided. Yes. The compression coil springs 81a and 81b are stably held by the spring receiving portions 884a and 884b having such shapes. The front side surface 881 of the spring receiving member 88 is formed with recesses 882a and 882b at both ends, and these widths are set to be substantially the same as the width of the rail portions 85a and 85b. Rail portions 85a and 85b overlap 882b, and a convex portion between concave portions 882a and 882b is fitted between end sides 851a and 851b. The spring receiving member 88 can reciprocate more smoothly by the action of the rail portions 85a and 85b.

  At the lower end portion of the spring receiving member 88, a groove is formed in the X-axis direction, and a shaft holding portion 883 for holding the second link shaft 94 is provided. In the configuration as described above, the spring receiving member 88 is pushed up by the second link shaft 94 and pushed down by the compression coil springs 81a and 81b.

  Next, the link mechanism 9 will be described. The link mechanism 9 includes a first link shaft 90, a second link shaft 94, and link members 92 a and 92 b that connect the first link shaft 90 and the second link shaft 94. At both ends of the first link shaft 90, holes 922a and 922b provided at one end of the link members 92a and 92b are rotatably connected, and holes 921a provided at the other ends of the link members 92a and 92b, Both ends of the second link shaft 94 are rotatably connected to the 921b. The second link shaft 94 is inserted through the long holes 86a and 86b, and washers 95a and 95b are inserted between the side plates 83a and 83b.

  In the link mechanism 9 as described above, when the original cover 3 is opened / closed, the first link shaft 90 moves in the direction opposite to the swinging direction of the original cover 3. For example, when the original cover 3 is raised, the first link shaft 90 is lowered. When the original cover 3 is lowered, the first link shaft 90 is raised.

  With the configuration as described above, the operation of the opening / closing support device 5 of the present invention will be described based on the perspective view and the side view shown in FIG. In FIG. 4, the upper diagram (FIG. 4A) is a perspective view, and the lower diagram (FIG. 4B) is a side view with the mounting member 6 in cross section. The diagram on the left side of FIG. 4 shows the state of the opening / closing support device 5 in a state where the original cover 3 is closed. In this state, the original cover 3 is covered with the contact glass 4, that is, the lowest position. In this state, the first link shaft 90 connected to the support member 7 is located at the uppermost position, and at the same time, the second link shaft 94 is located at the uppermost position. That is, the spring receiving member 88 to which the second link shaft 94 is connected is located in a state where the compression coil springs 81a and 81b are most compressed. Therefore, the original pressing plate 3 has the largest rotational bias acting in the opening direction. Here, when the original cover 3 is lifted, the support member 7 is rotated upward as shown in the center of FIG. At this time, the first link shaft 90 moves downward (Z-axis negative direction) as the support member 7 rotates upward. At the same time, the second link shaft 94 moves downward (Z-axis negative direction) in the long holes 86a and 86b. The opening operation of the original cover 3 is saved by the rotational bias generated by the elastic force of the compression coil springs 81a and 81b.

  Furthermore, when the original cover 3 is pushed up to the most open state, the support member 7 is substantially upright as shown in the right side of FIG. 4, and the first link shaft 90 moves to the lowest value. . At the same time, the second link shaft 94 also moves to the lowest value along the long holes 86a and 86b, and the compression coil springs 81a and 81b are in the most extended state while maintaining the compressed state.

  FIG. 5 is a schematic diagram showing the configuration (B) of the present invention and the conventional configuration (A). In the conventional configuration, the spring 81c is disposed between the hinge shaft 70c and the apparatus main body 2, and an elastic force is applied between the hinge shaft 70c and the apparatus main body 2 by the spring 81c. It is necessary to take a long distance La to the apparatus main body 2. Further, the rotational biasing force generated around the hinge shaft 70c by the elastic force of the compression coil spring 81c becomes stronger as the distance Ma from the center of the hinge shaft 70c to the power point becomes longer. Therefore, when the document crimping plate 7c is opened with respect to the apparatus main body 2c, the gap between the document crimping plate 7c and the apparatus body 2 is widened, and the compression coil spring 81c needs to have a large spring load. was there. On the other hand, in the opening / closing support apparatus 5 of the present invention, the distance Lb between the hinge shaft 70 and the apparatus main body 2 is shorter than La of the configuration (B) described above, and the distance to the center of gravity position of the original cover 2 is reduced. Since the distance between the apparatus main body 2 is reduced when the original cover 7 is opened and the compression coil spring 81 with a small spring load is sufficient, the apparatus can be downsized. It was made.

  Since the present invention is configured as described above, the opening / closing support apparatus can reduce the gap between the original cover and the apparatus main body at the time of opening, and can sufficiently obtain a rotational biasing force against the original cover even in a small size. It can be used for a copying machine, a printer, a scanner, or a printing machine.

DESCRIPTION OF SYMBOLS 1 Copier 2 Apparatus main body 3 Original pressure bonding plate 31 Mounting hole 4 Contact glass 5 Opening / closing support apparatus 6 Mounting member 7 Supporting member 70 Hinge shaft 8 Guide member 81a, 81b Compression coil spring 88 Spring receiving member 9 Link mechanism 90 1st link shaft 92a, 92b Link member 94 Second link shaft

Claims (3)

An opening / closing support device provided between the apparatus main body and a document crimping plate opened / closed with respect to the apparatus main body,
A hinge shaft supported on the apparatus body side;
A support member that is swingably supported by the hinge shaft and has a swing end fixed to the opening / closing lid;
In the support member, a link member having one end connected to the end opposite to the swing end with respect to the hinge shaft;
A spring receiving member connected to the other end of the link member;
An opening / closing support device comprising: an elastic member that applies an urging force that swings the support member in a direction to open the support member to the spring receiving member via the link member.   The opening / closing support apparatus according to claim 1, further comprising a guide member that is fixed to the apparatus main body side and regulates a moving direction of the spring receiving member.   The opening / closing support device according to claim 2, wherein the guide member has a housing portion that houses an elastic member and a spring receiving member, and the spring receiving member moves within the housing portion.

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