JP5022146B2 - Opening and closing device, equipment, image forming device - Google Patents

Description

  The present invention relates to an improvement in a transport apparatus mounted on an image forming apparatus such as an electrophotographic copying machine, a printer, a facsimile machine, an ink jet printer, or a multifunction machine having two or more of these functions. The present invention relates to an opening / closing mechanism having good opening / closing operability while securely holding the opening / closing portion in the closed position.

  In recent years, the image feeding and forming apparatus as described above is desired to have a large capacity of the paper feeding device, but many have complicated paper conveyance paths in order to reduce the occupied area of the machine. In many of such image forming apparatuses, a part of the apparatus exterior is configured to be openable and closable with respect to the apparatus main body by a predetermined opening / closing mechanism so that a trouble such as a jam that has occurred can be easily recovered.

  In such a device, when removing jammed paper left in the machine, it is necessary to work in a limited space, but from the viewpoint of usability, ensuring space for safe and efficient work. Is required. Further, it is necessary to convey the paper without any problem when the opening / closing mechanism for removing the jammed paper is closed.

  For this reason, various techniques have been proposed. For example, in the invention disclosed in Patent Document 1, the opening mechanism of the internal member linked to the exterior is not intended for a plurality of guide plates. In the invention disclosed in Patent Document 2, the opening / closing operability of the duplex unit is improved, but the pressing mechanism is not provided. The invention disclosed in Patent Document 3 has cover lock means for fixing and maintaining the open state, but does not efficiently open and close the plurality of guide plates, and the cover lock by the magnet is sufficient. There is a risk that the guide plate may be accidentally closed when the jammed paper is removed because the fixed holding force cannot be obtained. Furthermore, in the invention disclosed in Patent Document 4, the opening / closing mechanism of the internal member linked to the exterior is not intended for a plurality of guide plates.

JP 2004-340999 A JP 2003-295733 A JP 2006-231684 A JP 07-285704 A

  Accordingly, an object of the present invention is to provide a guide plate opening / closing device capable of efficiently and safely removing jammed paper even in a limited space, and an apparatus and an image forming apparatus using the guide plate opening / closing device.

  Further, in the present invention, a guide plate opening / closing device having good opening / closing operability while securely holding the opening / closing portion for removing jammed paper in the closed position even in a limited space, and an apparatus using the same, and image formation An object is also to provide a device.

In order to achieve the above object, the switchgear according to claim 1 of the switchgear of the present invention
A plurality of guide plates rotatably supported;
A guide plate pressing mechanism which is paired with the guide plate and is rotatably supported;
The guide plate pressing mechanism includes a link that links the plurality of guide plates and the guide plate pressing mechanism paired with the guide plates by a fulcrum that is different from the rotation fulcrum of the guide plate pressing mechanism ,
The guide plate can be opened and closed by the rotation of the guide plate pressing mechanism, and the distance between the rotation fulcrums of the opening / closing operation mechanism is shorter than the distance between the rotation fulcrums of the guide plate in the closed state of the guide plate. An opening and closing device arranged as follows:
The link is disposed within a sheet-passable width of the guide plate,
The link is provided with a recess or an opening for increasing the rotation range of the guide plate.
It is characterized by that.

According to a second aspect of the present invention, in the opening / closing device of the first aspect, at least one of the guide plates is held in an open state by a pressing portion provided in a guide plate pressing mechanism of the guide plate in the open state of the guide plate. possible and to be characterized by Rukoto such by.

Pertaining to claim 3 is the opening and closing device according to claim 1 or 2, wherein the link is characterized by varying the rotational direction of the adjacent guide plate pressing mechanism.

According to a fourth aspect of the present invention, the guide plate includes a driven roller .

According to a fifth aspect of the present invention, in the opening / closing device according to any one of the first to fourth aspects, the guide plate can be pressurized using a roller, a spring, and a detent that is an interrupting member in the guide plate pressing mechanism. It is characterized by becoming.

According to a sixth aspect of the present invention, in the switchgear of the fifth aspect ,
A spring is provided at a rotation fulcrum where the guide plate and the link are connected,
A roller is disposed at the free end of the link, and the guide plate moves so that the roller slides a guide plate different from the guide plate,
When the guide plate is closed, a guide plate different from the guide plate is pressed to a predetermined position by the pressing force of the spring.

According to a seventh aspect of the present invention, there is provided a device comprising a plurality of the switchgear according to any one of the first to sixth aspects.

An image forming apparatus according to an eighth aspect is characterized in that the opening / closing device according to any one of the first to sixth aspects or the device according to the seventh aspect is provided in a transport unit.

  ADVANTAGE OF THE INVENTION According to this invention, the apparatus which can open and close a guide board efficiently and safely, and can remove jam paper easily in the limited space can be provided.

    The best mode for carrying out the present invention will be described below with reference to the embodiments shown in the drawings. In this specification, not only a single image forming apparatus such as a copying machine but also a system unit obtained by adding a paper feeding device or the like as an external device to the image forming apparatus is referred to as an image forming apparatus. Needless to say, the image forming apparatus includes a paper feeding device.

  FIG. 1 is a schematic diagram of an entire image forming apparatus to which the present invention is applied. In this embodiment, a first paper feeding device 110 and a second paper feeding device 120 are arranged on the right side (upstream side in the paper conveyance direction) of the image forming apparatus 150 to form a system unit. The first paper feeding device 110 includes a second paper feeding device when the paper feeding path 114 that feeds the paper from the paper feeding trays 111 and 112 to the image forming device 150 and the second paper feeding device 120 are connected. There is a relay conveyance path 115 that merges from 120 to the paper conveyance path 114. The relay conveyance path 115 includes a vertical conveyance section 115 b that conveys to the upper part of the paper feed tray 111 and a horizontal conveyance path 115 a that conveys the upper part of the paper feed tray 111. It is also possible to transport the paper feed tray 111 and the paper feed tray 112 horizontally. In this case, the vertical transport unit 115b can replace the horizontal transport path. An image reading device 160 and an automatic document feeder 170 are disposed above the first paper feeding device 110. These are the same as those conventionally known and will not be described in detail.

  A manual sheet feeder 180 is disposed above the second sheet feeder 120. This apparatus is also the same as that conventionally known and will not be described in detail. The number of paper feeding devices and the number of paper feeding trays to be mounted are not limited to those in the illustrated example, and are arbitrary, and a plurality of paper transport paths for transporting paper from upstream to downstream may be arranged. Is possible. In addition, the image reading device 160, the automatic document feeder 170, and the manual paper feeder 180 disposed on the upper portion of the paper feeders 110 and 120 are reversed, or any one of a plurality of devices is arranged, or It is possible not to arrange them, and the present invention is not limited to the illustrated example.

  As shown in FIG. 2, in the apparatus configured as shown in FIG. 1, for example, when a jam occurs in the vertical conveyance unit 115 b of the first sheet feeding device 110, the right side in the drawing is configured to be opened and closed by a predetermined opening / closing mechanism. The opening / closing door 1 is opened.

  As shown in FIG. 3, inside the open / close door 1, there are a rotation fulcrum 2 a disposed on the guide plate 2, a rotation fulcrum 3 a disposed on the guide plate 3, and a guide plate pressing mechanism disposed on the guide plate 2. 4, a pressure receiving portion 3 b of the guide plate pressing mechanism 5 disposed on the guide plate 3, a rotation fulcrum 4 a disposed on the guide plate pressing mechanism 4, and a rotation fulcrum 5 a disposed on the guide plate pressing mechanism 5. A link fulcrum 4b of the guide plate pressing mechanism 4 arranged at a position different from the rotation fulcrum of the guide plate pressing mechanism, a link fulcrum 5b arranged in the guide plate pressing mechanism 5, and a link 6 are provided. In some cases, these parts are covered with an inner cover (not shown) so that the door 1 cannot be seen from the outside even if the door 1 is opened as shown in FIG.

  In the mechanism shown in FIG. 3, as shown in FIG. 4, when the operation lever 7 attached to the guide plate pressing mechanism 4 is rotated counterclockwise in the figure, the guide plate pressing mechanism 5 is rotated clockwise by the link 6. To turn. As a result, the guide plate pressing is released, and as shown in FIG. 5, the guide plate 2 is rotated clockwise by a torsion coil or a tension spring (not shown), and the guide plate 3 is rotated by an attached rotation receiving portion 3c. It rotates counterclockwise in the figure.

As shown in FIG. 6, the tip of the guide plate pressing mechanism 5 has a roller 5c, and the rotation receiving portion 3c of the guide plate 3 has a substantially R shape curved in accordance with the roller 5c . While reliably following the turning operation of the guide plate pressing mechanism 5, it is possible to prevent the roller 5c at the tip of the guide plate pressing portion from being accidentally removed and closing the guide plate inadvertently. If the guide plate 3 is to be held in the open position by a torsion coil or a tension spring, a sufficiently strong holding force is required, but this becomes an excessive load for the closing operation, and the operating force is reduced. Will lead to an increase. In addition, due to its strength, there is a concern of an operator's injury due to abrupt guide plate operation, but the rotation operation by the rotation receiving portion 3c of the above-described guide plate 3 causes an increase in operation force. In addition, since the guide plate 3 can be opened and closed without fail, the operability is not deteriorated and injuries are not caused. Therefore, it is possible to efficiently and safely remove jammed paper even in a limited space.

  FIG. 7 shows a second embodiment of the present invention. In this embodiment, the guide plate pressing mechanisms 4 and 5 are arranged at positions where the rotation range of the guide plates 2 and 3 can be increased so that the jammed paper can be easily removed. No. 4 or 5 is provided with an opening 4d or a recess 5d so that there is no interference with the guide plate or parts attached to the guide plate, so that the rotation range can be expanded. Therefore, in this embodiment, the jam paper can be removed efficiently and safely even in a limited space.

  Further, by arranging the link 6 in an unnecessary space within the width of the guide plate, the machine can be reduced in size. Further, similarly to the above, the recess 6d can be provided so as not to interfere with the guide plate or parts attached to the guide plate with the aim of expanding the guide plate rotation range.

  Further, as described above, the plurality of guide plates can be opened by rotating the operation lever 7 counterclockwise, but can be easily closed by rotating the operation lever 7 clockwise. can do. Even when the guide plate 3 or 4 is provided with a driven roller so that a small size can be passed, the guide plate can be reliably opened and closed regardless of the reaction force of the driven roller at the guide plate closed position.

  That is, the guide plate opening and closing device of the present invention is excellent in operability when removing jammed paper and can reduce the size of the machine. In addition, a sufficient guide plate opening space can be obtained by the opening operation even in a limited space, and the guide plate can be easily held at the closed position by the closing operation. In addition, jam paper can be removed safely by holding the guide plate securely. Further, the followability of the guide plate rotating operation by the lever operation can be improved, and the roller at the tip of the guide plate pressing portion can be prevented from being accidentally removed and the guide plate can be prevented from being closed carelessly. Furthermore, the space where jammed paper can be removed is increased, the working efficiency is improved, and a sufficient paper conveying force can be obtained by the guide plate pressing mechanism regardless of the reaction force of the driven roller at the guide plate closed position. Jam paper removal work can be done well and safely.

  In the apparatus configured as shown in FIG. 1, for example, when a jam occurs in the sheet conveyance path 114 of the first sheet feeder 110, as shown in FIG. The opening / closing door 11 is opened.

  As shown in FIG. 9, inside the open / close door 11, a rotation fulcrum 12 a disposed on the guide plate 12, a rotation fulcrum 13 a disposed on the guide plate 13, and a guide plate pressing mechanism 14 are disposed. There are a rotation fulcrum 14 a, a link fulcrum 15 a of the link 15 disposed on the guide plate 12, and a free end 15 b of the link 15.

  When the operation lever 16 attached to the guide plate pressing mechanism 14 shown in FIG. 10 is rotated in the clockwise direction in the drawing, the pressure on the guide plate 12 is thereby released, and as shown in FIG. In the clockwise direction, the guide plate 13 is traced back by a roller 17 disposed on the free end 15b of the link 15 having a rotation fulcrum on the guide plate 12, and is rotated clockwise. In order to obtain a space where jammed paper can be easily removed in a limited space, the guide plate 3 is rotated clockwise and the guide plate 2 is rotated counterclockwise.

  As shown in FIG. 12, an interrupting material 18 is provided in the guide plate pressing mechanism 14, a pressing shaft 19 is provided so as to penetrate each interrupting material 18, and a spring 20 is provided on each interrupting material 18, A structure in which the pressing shaft 19 can be reciprocated by the elastic force of the spring 20, a roller 21 is provided at the end of the pressing shaft 19 on the guide plate 12 side, and the guide plate 12 is pressed and positioned by the roller 21 to a predetermined position. can do. Further, the pressing force can be easily changed by changing the spring 20. The pressing force can be changed by replacing the roller 21 with rubber other than the mold.

As shown in FIG. 13, the roller 21 disposed in the guide plate pressing mechanism 14 fits into the press receiving portion 22 provided in the guide plate 12, thereby pressing the guide plate 12 to a predetermined position. In addition, the pressing portion receiving shape portion 22a is formed into a substantially R-shaped concave portion that is curved in accordance with the roller 21, so that the feel when the roller 21 fits into the pressing receiving shape portion 22a is obtained. Can be confirmed to be accurately placed at a predetermined position.

  Further, as shown in FIG. 14, the followability of the guide plate 13 to the guide plate 12 can be changed by changing the spring 23 provided at the link fulcrum 15 a of the link 15 arranged on the guide plate 12. Since the pressing property of the guide plate 13 can be changed by changing the spring as described above, the conveyance force can be obtained even if the conveyance roller is arranged on the guide plate 12.

  By providing a plurality of structures as described above, it is possible to reliably prevent the guide member 12 from being partially closed, and to uniformly press the transport roller. In addition, the operability can be improved even when the guide plate 12 is provided with a driven roller in order to increase the sheet passing size, and the guide plate is not affected by the reaction force of the driven roller in the closed position of the guide plate 12. A sufficient paper conveying force can be obtained by the pressing mechanism 14. That is, according to the present invention, it is possible to provide a machine that provides an open / close lock mechanism with good open / close operability while securely holding the open / close portion for removing jammed paper in the closed position even in a limited space.

Schematic diagram of the entire image forming apparatus to which the present invention is applied FIG. 1 is a perspective view showing an opening / closing door on the right side of the vertical conveyance unit of the first sheet feeding device shown in FIG. Side view showing the internal mechanism of the door shown in FIG. The perspective view which shows the internal mechanism of the door shown in FIG. Side view showing the operation of the internal mechanism of the door shown in FIG. The expanded side view which shows the principal part of the internal mechanism of the door shown in FIG. The perspective view which shows Example 2 of this invention The perspective view which shows Example 3 of this invention, and shows the state which opened the open / close door of the left side of the vertical conveyance part of the 1st paper feeder shown in FIG. Side view showing the internal mechanism of the door shown in FIG. The perspective view which shows the internal mechanism of the door shown in FIG. Side view showing the operation of the internal mechanism of the door shown in FIG. The top view which shows the modification of the internal mechanism of the door shown in FIG. The perspective view which shows the other modification of the internal mechanism of the door shown in FIG. The perspective view which shows the further another modification of the internal mechanism of the door shown in FIG.

Explanation of symbols

1: Opening / closing door 2: Guide plate 2a: Rotating fulcrum 3: Guide plate 3a: Rotating fulcrum 4: Guide plate pressing mechanism 2b: Pressure receiving portion 5: Guide plate pressing mechanism 3b: Pressure receiving portion 4a: Rotating fulcrum 5a: Time Dynamic fulcrum 4b: Link fulcrum 5b: Link fulcrum 6: Link 7: Operation lever 3c: Rotation receiving part 5c: Roller 4d: Opening 5d: Recess 6d: Recess 11: Opening / closing door 12: Guide plate 12a: Rotation fulcrum 13 : Guide plate 13a: Rotating fulcrum 14: Guide plate pressing mechanism 14a: Rotating fulcrum 15: Link 15a: Link fulcrum 15b: Free end 16: Operation lever 17: Roller 18: Severing material 19: Pressing shaft 20: Spring 21 : Roller 22: Press receiving portion 22a: Press receiving portion 23: Spring 110: First paper feeding device 111, 112: Paper feed tray 114: Paper transport path 115: Relay transport path 115 a: horizontal conveyance path 115b: vertical conveyance unit 120: second paper feeding device 150: image forming device 160: image reading device 170: automatic document feeder 180: manual paper feeding device

Claims (8)

A plurality of guide plates rotatably supported;
A guide plate pressing mechanism which is paired with the guide plate and is rotatably supported;
The guide plate pressing mechanism includes a link that links the plurality of guide plates and the guide plate pressing mechanism paired with the guide plates by a fulcrum that is different from the rotation fulcrum of the guide plate pressing mechanism ,
The guide plate can be opened and closed by the rotation of the guide plate pressing mechanism, and the distance between the rotation fulcrums of the opening / closing operation mechanism is shorter than the distance between the rotation fulcrums of the guide plate in the closed state of the guide plate. An opening and closing device arranged as follows:
The link is disposed within a sheet-passable width of the guide plate,
The link is provided with a recess or an opening for increasing the rotation range of the guide plate.
A switchgear characterized by that. The switchgear according to claim 1,
An opening / closing apparatus characterized in that, in the open state of the guide plate, at least one of the guide plates can be held in an open state by a pressing portion provided in a guide plate pressing mechanism included in the guide plate.   3. The switchgear according to claim 1 or 2, wherein the link changes a rotation direction of adjacent guide plate pressing mechanisms.   4. The opening / closing apparatus according to claim 1, further comprising a driven roller on the guide plate. In any of the opening and closing device according to claim 1, wherein the in the guide plate pressing mechanism using a detent is roller and spring and cross衝材, characterized by comprising the said guide plate pressurizable Switchgear. The switchgear according to claim 5 , wherein
A spring is provided at a rotation fulcrum where the guide plate and the link are connected,
A roller is disposed at the free end of the link, and the guide plate moves so that the roller slides a guide plate different from the guide plate,
Switchgear on the guide plate closing, wherein pressing to Rukoto the guide plate in position by the pressing force of the different guide plates the spring and the guide plate. It claims 1 to equipment characterized by Rukoto such includes a plurality of any of the switchgear 6. An image forming apparatus comprising: the opening / closing device according to claim 1 or the apparatus according to claim 7 in a transport unit .