JPH01214531A - Image forming device - Google Patents

Abstract

PURPOSE:To facilitate maintenance by making a sheet feeder mountable/ dismountable onto/from the machine body and enabling positioning thereof through a guide member, thereby enabling drew-out of the sheet feeder. CONSTITUTION:When a sheet feeder 1 malfunctions or when it is inspected, a worker opens an inspection cover and removes screws B for securing a front sideboard 23 to the machine frame 24 and for securing the rear sideboard 17 to the frame 24. Then the sheet feeder 1 is drawn out from the machine body 53 end repair is made. Upon finish of repair, the worker inserts the sheet feeder 1 into the machine body 53 while inserts a pressure board 6 into a groove 64c, then the grooves in the front and rear sideboards 23, 17 are fitted to a guide rail 64d. When the front and the rear sideboards 23, 17 are secured respectively to the machine frame 24 through the screws B, the sheet feeder 1 can be positioned in place.

Description

Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to an image forming apparatus such as a copying machine, a printing machine, or a laser beam golink. An image forming apparatus (hereinafter referred to as a copying machine) having an image forming apparatus (hereinafter referred to as a copying machine) having a storage device (hereinafter referred to as a cassette) ii!
Regarding.

(b) Prior Art Conventionally, a copying machine has been known which has a cassette that stores a large number of sheets inside the main body of the apparatus and is detachably installed in a direction perpendicular to the sheet conveyance direction. Cassette)
・is guided and positioned at a predetermined position on the main body of the device by a guide member (hereinafter referred to as a guide rail). Then, the sheet is fed from the cassette to the copying section by the sheet feeding device, and in the copying machine, the sheet feeding roller of the sheet feeding device and the sheets 1 to 1 in the cassette are fed to the copying section. A lid sensor that biases the lifter to the position where the sheet can be fed, a lid sensor that detects whether the lifter is pushing up the sheet to a position where sheets can be fed, and a sheet presence/absence sensor that detects the presence or absence of sheets in the cassette are disposed at the rear of the lower center of the main body of the device. The drawback was that maintenance work was difficult because of the

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image forming apparatus that solves the above-mentioned problems by making it possible to easily carry out maintenance by pulling out the sheet feeding device outside the main body of the apparatus.

Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances. For example, when shown with reference to FIGS.
) A removably attached seat storage device (65, 66) that stores a large number of seats inside, and a guide portion 4 (64n,
641]) and the sheet storage device (65, 611i)
In an image forming apparatus (51) having a saw 1~feeding device (1) for feeding sheets 1~ from The device is characterized in that it is configured so that the device can be easily positioned, and that the guide members (64a, 64b) allow positioning to be performed when the device is attached to the device main body (53).

Based on the configuration described in (e) Operation, during maintenance work, the sheet feeding device (1) is removed from the main body (53) and subjected to maintenance work, and after the work is completed, the main body (53)
). At this time, the sheet feeding device (1) has a guide means (64) that guides the sheet storage device (65, 66).
a, 64 b). And sea
When the storage device (65° 66) is attached to the main body (53), sheets are fed from the sheet storage device (65, 66) by the sheet feeding device (1).

(f) Examples Examples of the present invention will now be described with reference to the drawings.

As shown in FIG. 2, the copying machine 51 has a main body 53 containing a copying section 52, and the main body 53 includes a platen 55, a light source 56, mirrors 57, 58, 59, 60,
6], 62, a lens 63, and two cassettes 65 and 66 for storing sheets S that can be attached and detached by moving on guide rails 64a and 64b, and these cassettes 1-65
, 66 have a middle plate 5, and these cassettes 1-65.6
A unitized sheet feeding device 1 is disposed adjacent to the sheet feeding device 6 . A registration roller pair I67 is disposed downstream of the sheet feeding bag M, and the copying section 52 is disposed downstream of the roller 67. includes a conveyor bell 1-69 and a fixing device 7.
0 is placed. A flapper 71 and a pair of paper ejection rollers 72 are arranged downstream of the fixing device 70.
In addition, it is branched to the above-mentioned Waratsuba 7] and re-transported! l87
3, and the re-feeding roller pair 75 and a re-feeding sensor 76 are disposed in the re-conveying meridian 73.

Furthermore, the guide rail 64b is as shown in FIGS.
As shown in FIG.
゜24, and the front and rear side plates 23, which will be described later,
The sheet feeding device 1 is positioned by fitting the groove of the core with the guide 1 knoll 64b.

In addition, the pressure plate 6 is inserted into the guide rail 64b and the slotted groove 6
4c is engraved on the tongue.

As shown in FIG. 7.77
, pressure plates 6, 6, positioning sensors 15° 15, guide plates 79, 80, 8], 82, 83, and a pair of registration rollers 85 are arranged approximately parallel to the front and rear side plates 23, 17. It is arranged at an angle of 86.87°89, thereby creating an integrated unit.

Further, in the sheet feeding device 1, as shown in FIGS. 1, 5, and 6, the front and rear side plates 23.17 are connected to the body frame 2.
4 with screws B, and these side plates 23, 17
The grooves 23a and 17a (see FIG. 3 (bl)) are positioned by fitting and misaligning with the guide rail 64b.Furthermore, the shaft 9a is rotatably supported by the upper stay 86 and the rear side plate 17, A conveyance roller 9 is fixed to the front side of the shaft 9a. A pulley 19 is fixed to the tip of the shaft 9a, and a support plate is provided on the back side of the shaft 9a from the conveyance roller 9. 1] is rotatably supported.Furthermore, on the back side of the shaft 9a, an input gear 20 connected to a drive means (not shown) is rotatably supported,
The gear 20 is configured to be connected to and released from the shaft 9a by a clutch 21 supported by the shaft 9a,
Further, the shaft 9a has a driving gear 2 adjacent to the manual gear 20.
2 is fixed. The front side plate 23 has the shaft 9
A pin 25 is fixed on the axis of a, and the support plate 11 is rotatably supported by the pin 25. Also,
A positioning sensor 15 is disposed on the fuselage frame 24 close to the tip of the support plate 11, and the tip of the support plate 1 is positioned between the light emitting part 15a and the light receiving part 15b of the sensor 15. It has become. Furthermore, the sensor holder 2
6, a shaft 7 is rotatably supported by the front side plate 23 and a middle stay 87, and at the front end of the shaft 7,
A gear 30 connected to a motor (not shown) is fixed, and a pressure plate 6 is fixed to the rear end.

Further, the support plate 1.1. ．． A shaft 31 is rotatably supported by 1.1, and a pulley 32 is fixed to the center of the shaft 31, and a timing bell 1 is connected to the pulley 32 and the pulley 19. A long hole 87a is formed in the middle stay 87, and a support member 36 is supported in the long hole 87a so as to be able to rise and fall freely by a spring 35 whose one end is fixed to the stay 87. A shaft 37 is rotatably supported by the support member 36 and the rear plate 17, and is engaged with the drive gear 22 and the idle gear 39 at the rear end of the shaft 37. A gear 40 is fixed to the shaft 37. Furthermore, a separation roller 10 is freely rotatably supported at the front end of the shaft 37, and an output drum 41 is mounted adjacent to the roller 10.
7 for free rotation. An input drum 42 is fixed to the shaft 37 in close proximity to the output drum 41, and a clutch spring 43 wound to the left in front view is disposed around the input drum 42 and the output drum 41. As a result, it acts as a torque limiter in the clockwise direction.
It constitutes a clutch 45 that operates. In addition, 46 in the figure
is a clutch case that protects the clutch spring 43.

Since this embodiment has the configuration as described below, the cassette 65 is guided by the rules 64a and 64b, and the fuselage main body 5 is fixed.
3, the cassette 1-65 is detected by a cassette sensor (not shown). Then, a control unit (not shown) that receives the detection signal from the skein/soto sensor,
Based on the signal from the positioning sensor 15, it is determined whether the tip of the support plate 1 is detected by the sensor 15, that is, whether the paper feed roller 12 is located at the paper feed position;
If it is determined that it is located, it waits until a star 1 key (not shown) is pressed. In addition, if the positioning sensor 15 is not located at the paper feeding position, the positioning sensor 15
If the tip of the gear 30 is not detected, the control unit rotates the gear 30 clockwise by a motor (not shown). As a result, the shaft 7 rotates clockwise, and the pressure plate 6 rotates clockwise due to the rotation of the shaft 7, pushing up the middle plate 5.
The feed roller 12 and the support plate J are connected via the sheets 1 to S.
] Push up. When the positioning sensor 15 detects the tip of the support plate 11, the control section that receives the signal from the sensor 15 determines that the paper feed roller 12 is located at the paper feed position and stops the motor. Then, when the operator presses the start gear, the input gear 20 rotated by a motor (not shown) is connected to the shaft 9a by the clutch 21, and the shaft 9a rotates counterclockwise. Furthermore, the rotation of the shaft 9a rotates the conveying roller 9 and the pulley 19, and the rotation of the pulley 9 rotates the shaft 31 counterclockwise via the timing bell 1-33 and the pulley 32. And the axis 3
A paper feed roller 12 rotates together with the paper feed roller 1 to feed the sheet S stacked on the intermediate plate 5, and the sheet S is fed to the conveyance roller 9. Then, the sheets S are separated one by one by the conveyance roller 9 and the separation roller 10, and then moved to the guide 81.
．． ．． 82 and guided by these guides 8], , 82 to a pair of L dystrollers 85. Furthermore, the roller pair 85 carries the J:rinKno1-S to the registration roller pair 67, and the roller pair 67 transfers the image to the copying section 52.
The sheet is synchronously conveyed to the image forming apparatus, where the image is copied, and conveyed by the conveyor bells 1 to 69 to the fixing WI 70, where the image is fixed. be done. In the case of double-sided image formation, the sheet S with the image copied on one side is guided to the re-conveying path 73 by the flapper 71, and is re-fed to the registration 1-roller pair 67 by the re-feeding roller pair 75. , the image is copied onto a blank sheet of paper in the same manner as described above and is discharged to the outside of the main body 53 of the machine.

When the sheet feeding device 1 malfunctions or is inspected, the operator must open the inspection cover (not shown) on the right side of the machine body 53.
, and remove the screws B that fix the front side plate 23 to the body frame 24 and the screws B that fixes the rear side plate 17 to the body frame 24. Then, the sheet feeding device 1 is pulled out of the main body 53 in the direction of the arrow (see FIG. 1), and the malfunctioning part is repaired or the parts to be inspected are inspected.

After completing the repair or inspection, the worker shall
Insert the feeding device 1 into the main body 53 in the direction opposite to the arrow A, insert the pressure plate 6 into the groove 2 of the front plate 23
3a and the groove 17a of the rear side plate 17 and fit into the groove 64b, the front side plate 23 is fixed by the fuselage frame 24 heavies B, and the rear side plate 17 is fixed by the fuselage frame 24 helices B. , the sheet feeding device 1 is positioned at a predetermined position. The operator then closes the inspection cover and finishes the job.

In the above embodiment, the upper and lower cassettes l-6
Although the explanation has been made using the sheet feeding device 1 that is integrated into a unit 1 as the sheet feeding means for the 5th and 66th sheets, the invention is not limited to this, and as shown in FIGS. 7 and 8, the upper sheet feeding device 1′
And, no matter which two units are used for the lower sheet feeding device. In addition, the stacked sheet feeding device 1' has upper and lower stays 86' and 87' installed on the front and rear side plates 23' and 17', and these stays 86'.

On 87', there are provided a paper feed roller] 2, a conveyance roller 9, a separation roller 10, side plates 81, 82, a support plate 11, a positioning sensor 15, and a No. 1 presence/absence sensor 77. Further, the feeding device M1# to the lower sheet sheet 1 has the same structure as the upper sheet feeding device 1'.

(G) As described in detail, according to the present invention, the sheet feeding device is configured to be detachable from the main body of the device, and
Since the sheet feeding device is configured to be positioned using a guide member when attached to the device main body, it is possible to easily perform maintenance work on the sheet feeding device by taking the sheet feeding device out of the device main body and performing maintenance work. In addition, the sheet feeding device can be positioned easily and accurately.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the main parts of the image forming apparatus according to the present invention, FIG. 2 is a front sectional view showing the image forming apparatus according to the present invention, and FIG. In the diagrams showing the guide means, ial is a side view, (bl is a front view.Furthermore, FIGS. 4 to 6 are views showing the sea 1 to the feeding device according to the present invention.And FIG. and FIG. 8 are diagrams showing other embodiments of the present invention. 1.1', 1'' Sheet 1 - Feeding device, 5] Image forming apparatus, 53 Apparatus main body, 64a, 64b - Guide member, 65.66 Storage device.

Claims (1)

[Scope of Claims] 1. A removably attached seat storage device that stores a large number of sheets inside the device main body, a guide member that guides the sheet storage device, and a sheet storage device that feeds sheets from the sheet storage device. An image forming apparatus having a sheet feeding device, wherein the sheet feeding device is configured to be attachable to and detachable from the device main body, and is positioned by the guide member when attached to the device main body. An image forming apparatus characterized in that it is configured to: