JPH09301553A - Large-capacity paper feeding device structure in image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large-capacity paper feeding device structure, in which a large-capacity paper feeding device (LCT) to be mounted on an image forming device is reliably prevented from falling when mounted or in an independent state and which saves space, is handleable at jam or maintenance, smoothly openable and closable and reduces in cost. SOLUTION: An LTC 1 is composed of an attaching and fixing part 2 to be positioned and fixed to an image forming device main body 4, and a slide part 3 provided with a paper feeding tray 10 on which many transfer paper sheets 15 are loaded and a paper feeding part 11 for feeding transfer paper sheets 15 one by one, and stands 7, 14 to be arranged by being separated from the floor surface 21 by the clearance δ in mounting to the image forming device main body 4 are fixed to the lower surfaces of the attaching and fixing part 2 and the slide part 3. The lowermost ends of the stands 7, 14 are formed into an approximately arched shape or an approximately spherical shape to reduce the contact resistance to the floor surface 21 side. The image forming device main body 4 and the independent LCT are not falling and is stably supported by providing at least three or more stands 7, 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-capacity paper feeding device mounted on an image forming device and stacking and feeding a large amount of transfer paper, and particularly to a large-capacity image forming device suitable for preventing tilting. The present invention relates to a sheet feeding device structure.

[0002]

2. Description of the Related Art As an image forming apparatus, there are many types of apparatus in which a sheet feeding section for feeding a transfer sheet is detachably attached to a main body of the image forming apparatus and an apparatus having a structure related thereto. Many of these devices are devised so that the entire device or the device itself does not easily fall when worn. As a known technique related to these, for example, Japanese Utility Model Laid-Open No. 62-53448
Japanese Patent Laid-Open No. 6-186790, Japanese Utility Model Laid-Open No. 63-
14252, etc. are mentioned. 62-534
"Document slide sliding image forming apparatus" disclosed in Japanese Patent No. 48
When the sheet cassette is stored and set in the storage portion inside the image forming apparatus main body, the leg (corresponding to the stand) provided at the end opposite to the insertion end of the sheet cassette is the image forming apparatus main body. It is characterized in that it is arranged so as to project to the outside, functions as a supporting leg of the image forming apparatus main body, and prevents the image forming apparatus main body from falling.

Further, the "image forming apparatus" of Japanese Patent Laid-Open No. 6-186790 discloses a document table which is movably attached to the apparatus body and on which a document is placed, and a sheet which is provided on a side portion of the apparatus body. It is characterized by having a tray for placing and a leg portion formed on the tray, and the apparatus main body is supported by the leg portion.

Further, in the "storage box of the image forming apparatus" of Japanese Utility Model Laid-Open No. 63-14252, an insertion port into which the apparatus mounting table is detachably inserted is provided on at least one surface of the apparatus. The mounting table is characterized in that a leg portion is hung and extended in the vicinity of the end edge on the pull-out side, and a trochanter is provided in the vicinity of the lower end portion of the leg portion. It should be noted that the trochanter has a structure that is separated from the floor surface when the apparatus mounting table is inserted into the image forming apparatus, and can contact the floor surface when pulled out from the image forming apparatus.

[0005]

The above-mentioned known arts have their respective characteristics and have the effect of preventing falling.
There are the following problems. First of all, Shokai 62-5344
In the case of Japanese Unexamined Patent Publication No. 8 (Japanese Unexamined Patent Publication No. 8), since the legs of the sheet cassette are only on one side and project downward, when the sheet cassette alone is placed on the floor by that amount, the sheet cassette becomes slanted. Therefore, when a large amount of transfer sheets are stacked in the sheet cassette, the sheet cassette becomes unstable and eventually falls. Further, when the sheet cassette is removed at the time of occurrence of a jam or during maintenance, there is a problem that the sheet cassette itself does not have a fall-prevention function, so that stable holding cannot be performed.

Further, in the case of Japanese Patent Laid-Open No. 6-186790, there is a problem that the installation space becomes large because the tray always projects from the main body of the apparatus, and further, when the tray is removed, it does not fall down. Consisting of inadequate structure,
In addition, there is a problem that it is inconvenient to handle when a jam occurs.

Further, in the case of Japanese Utility Model Laid-Open No. 63-14252, since the legs are present only on one side of the apparatus mounting table, the apparatus mounting table on which the image forming apparatus is mounted is independently removed and placed on the floor. I can't put it. As a result, it is difficult to perform work during assembly and maintenance. In addition, when the device mounting table is pulled out, the legs come into contact with the floor surface and it becomes difficult to pull it out, and it is necessary to attach a trochanter to prevent this, which increases the cost. There is.

The present invention solves the above-mentioned problems and prevents the fall of the device body both when it is attached to the device body and when it is taken out. It is an object of the present invention to provide a large-capacity sheet feeding device structure in an image forming apparatus in which pulling-out can be performed smoothly and cost reduction can be achieved, and the entire image forming apparatus can be moved smoothly during mounting.

[0009]

A large-capacity sheet feeding device structure in an image forming apparatus according to claim 1 is mounted on a sheet feeding tray detachably mounted on the image forming apparatus and capable of moving up and down a large number of transfer sheets. It has a large-capacity paper feeder structure
The large-capacity sheet feeding device is detachably positioned and fixed to the outside of the main body of the image forming apparatus, and is detachably guided along the sheet feeding direction to the attaching and fixing part so that the sheet feeding device is internally provided. The tray includes a tray and a slide unit including a paper feed unit that separates and feeds the transfer sheets on the paper feed tray one by one, and the attachment and fixing unit and the slide unit support the slide unit below the slide unit. A stand is provided, and the stand has a total number of three or more in the front and rear so as to stably support both of the mounting and fixing portion and the slide portion regardless of the engaging postures of the both.

According to a second aspect of the present invention, there is provided a large-capacity sheet feeding device structure in which the lowermost portion of the stand is mounted on the main body of the image forming apparatus and the lowermost portion of the stand is above the floor. It is characterized by consisting of shapes that are slightly apart.

According to a third aspect of the structure of the large-capacity sheet feeding device in the image forming apparatus, the lowermost portion of the stand is substantially arcuate or substantially spherical.

Although the stand is separated from the floor when the large-capacity sheet feeder is attached to the main body of the image forming apparatus, the stand does not fall over even if an external force is applied because of a small amount. Further, even if the slide portion is pulled out in the mounted state, the stand is also provided on the slide portion side, so that the fall is prevented as in the above. Further, even if the entire large-capacity sheet feeding device is detached from the image forming apparatus, the large-capacity sheet feeding device itself is provided with at least three stands so that it does not fall down.
When the stand is mounted on the main body of the image forming apparatus, the stand is away from the floor surface, so that the slide portion can be pulled out smoothly. Further, even if the floor surface has hairs that come into contact with the stand, such as Joutan, since the lowermost part of the stand is formed in a substantially arc shape and a substantially spherical shape, the contact resistance during movement is small and smooth movement is possible.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a large-capacity sheet feeding device structure in an image forming apparatus of the present invention will be described in detail below with reference to the drawings. First, referring to FIG. 1, the large-capacity sheet feeding device of the present invention (hereinafter referred to as LCT (Large Capacity Tra
1) is abbreviated and is composed of a mounting and fixing portion 2 and a slide portion 3. LCT1 is as shown in FIGS.
At the time of use, it is detachably mounted on the image forming apparatus main body 4 as a whole to feed paper.

As shown in FIGS. 1 to 3, the mounting and fixing portion 2 has a pair of L-shaped plate members 5, which are arranged so as to face each other.
5, an accompaniment rail 6 fixed to the inner surface side of each plate member and arranged for an appropriate length along the sheet feeding direction, a stand (leg) 7 fixed below the front end thereof, and a plate member 5 It comprises a reference pin 8 and a screw mounting portion 9 provided on the front surface. As shown in FIGS. 2 and 4, in order to mount the LCT 1 on the image forming apparatus main body 4, the reference pin 8 is inserted into a reference hole provided on the image forming apparatus main body 4 side for positioning, and the screw mounting portion is attached. Insert bolts etc. into 9 and tighten. The accuride rail 6 guides the slide portion 3 and has a cross-sectional shape that forms a locking portion as shown in the figure.

The slide unit 3 is roughly classified into a paper feed tray 10.
And a paper feeding section 11. Note that these are housed in a box-shaped case body 12. Accurate rails 13 and 13 for fitting the accuride rails 6 of the mounting and fixing portion 2 below the both sides of the case body 12 to support the case body 12 slidably in the sheet feeding direction on the mounting and fixing portion 2 side. Is fixed. Two stands 14, 14 are fixed below the case body 12 as shown in FIG.

The paper feed tray 10 is composed of a transfer paper loading table 16 on which a large number of transfer papers 15 are stacked, and an elevating means (not shown). That is, when the transfer paper 15 is set on the transfer paper mounting base 16 and the slide portion 3 is set on the mounting and fixing portion 2, the paper feed tray raising drive motor (not shown) is turned on by the detection signal from the set detecting means (not shown). Then, the paper feed tray 10 is lifted up to a predetermined position and put in an operation standby state.

On the other hand, the paper feed unit 11 has a paper feed roller 17 that comes into contact with the uppermost transfer paper 15 to feed paper, and a corner claw 18 (FIG. 2) for separating the fed transfer papers one by one. The transfer roller 19 includes a guide 20 that guides the transfer paper 15 to the transfer roller 19. By mounting the LCT 1 on the image forming apparatus body 4 and pressing an operation start key (not shown) on the image forming apparatus body 4 side, the transfer papers 15 are conveyed one by one.
9 is conveyed to the image forming apparatus main body 4 side and is conveyed from the conveying roller 19 to the image forming apparatus main body 4 side.

With the above structure, as shown in FIGS. 2 and 3, the LCT 1 is positioned and fixed on the image forming apparatus main body 1 side in a state where the slide portion 3 is housed in the mounting and fixing portion 2, and paper feeding is performed. In addition, the slide portion 3 has a positioning portion (not shown),
A locking body is provided, which engages with a not-shown positioned portion and a not-shown portion of the mounting and fixing portion 2 and is positioned and fixed at a predetermined position. On the other hand, as shown in FIG. 4 and FIG.
Can be guided by the accurride rails 6 and 13 and moved backward to open the LCT 1 widely to secure a wide working space, thereby facilitating the work during jamming and maintenance. Further, as described above, by housing the slide portion 3 in the mounting and fixing portion 2, the LCT 1 can be made compact.

A stand 7 and a stand 14 are fixed to the mounting and fixing portion 2 and the sliding portion 3, but in this embodiment, two are provided at the front end side of the mounting and fixing portion 2 and two at the rear end side of the stand 14. Has been. Further, as shown in FIGS. 2 and 4, when the LCT 1 is attached to the image forming apparatus main body 4, the bottom end of the stand 7 and the stand 14 is the floor surface 21.
It is formed of a material having a length slightly separated from As shown in FIGS. 2 and 4, this gap δ (FIGS. 2 and 4) is an image when the whole of the image forming apparatus main body 4 side is suddenly applied with an external force from the direction A and is inclined to the right tilt direction. The size is set so that the forming apparatus system does not fall down. With the above-described structure, the image forming apparatus equipped with the LCT 1 is stably supported by the four stands 7 and 14, and the fall is surely prevented. Of course, even when the slide portion 3 is opened as described above, it is stably supported. Further, since the stands 7 and 14 are separated from the floor surface 21 by the gap δ, the movement of the slide portion 3 is light and smooth.

FIG. 6 shows the LCT 1 removed from the image forming apparatus main body 1. Further, FIG. 7 shows a state in which the slide portion 3 is opened in a detached state. LCT as shown
Even in the single state of 1, the stands 7 and 14 support the LCT 1 regardless of the stored state and the opened state of the slide portion 3, so that there is no risk of falling. That is, as shown in the figure, the position of the center of gravity of the LCT 1 acts between the stand 7 and the stand 14 both when the slide portion 3 is housed and when the slide portion 3 is opened, and the LCT 1 is stably supported by the stands 7 and 14. As described above, when the LCT 1 is removed from the image forming apparatus main body 4, the stands 7 and 14 come into contact with the floor surface, so that it is not easy to move the slide portion 3 in the opening direction. Of course, it is not impossible to open the slide portion 3 as shown in FIG. As described above, the engagement between the mounting and fixing portion 2 and the slide portion 3 is mechanical engagement, not electrical engagement. Therefore, in the case of the LCT 1 alone, the slide portion 3 can be disengaged relatively easily. For simplicity, the stand 14 is arranged as shown so that the slide portion 3 cannot be easily opened.

When the LCT 1 is mounted on the main body 4 of the image forming apparatus, the stands 7 and 14 are spaced apart from the floor surface 21 by a gap δ as described above. However, as shown in FIG. In the case where the bristles 23 are densely packed on the surface like the jutan 22, the lower ends of the stands 7 and 14 come into contact with the bristles 23, which becomes a resistance against the movement of the LCT 1. Therefore, in the present invention, the shapes of the lowermost ends of the stands 7 and 14 are rounded into a substantially arc shape or a substantially spherical shape. As a result, as shown in FIG. 9, the resistance between the stands 7 and 14 and the bristles 23 is reduced, and the movement is smoothed.

10 (a) and 10 (b) show another embodiment of the present invention. In this example, the number of the stands 14 formed on the side of the slide portion 3 is one, and the LCT 1 as a whole uses only three stands. Even if the number of the stand 14 is one as shown in the figure, the LCT 1 is provided with the stand 7 by providing the slide 14 at substantially the center of the rear end.
It is stably supported by three of 7 and the stand 14.

[0023]

【The invention's effect】

1) According to the structure of the large-capacity sheet feeding device in the image forming apparatus according to claim 1 of the present invention, the LCT is composed of a mounting / fixing portion to the main body of the image forming apparatus and a slide portion for stacking the transfer paper,
Since each has a stand (leg) and the total number thereof is at least three or more, it is possible to prevent the system from falling when the LCT is attached. Further, it is possible to improve the workability when the transfer paper is jammed, maintenance, and the like, and prevent the image forming apparatus from falling over at this time. In addition, the LCT can be stably placed even if it is detached from the main body of the image forming apparatus and placed on the floor alone, and the sliding part is prevented from easily sliding, and the LCT does not fall over even if it is slid. You can

2) According to the structure of the large-capacity sheet feeder in the image forming apparatus of claim 2 of the present invention, when the LCT is attached to the main body of the image forming apparatus and when the slide operation is performed,
Since the stand is separated from the floor surface, the slide part of the LCT can be moved smoothly. Also, no trochanter is required.

3) According to the structure of the large-capacity sheet feeding device in the image forming apparatus of claim 3 of the present invention, since the lowermost shape of the stand is substantially arcuate or substantially spherical,
It can move more smoothly than the LCT slide part. In addition, the trochanter can be eliminated more reliably.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall structure of an LCT of the present invention.

FIG. 2 is a side view showing a state in which the LCT of the present invention is attached to the image forming apparatus main body.

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a side view showing a state in which a slide portion of the LCT of the present invention mounted on the main body of the image forming apparatus is opened.

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a side view showing a single structure of the LCT of the present invention.

FIG. 7 is a side view showing a single structure of the LCT of the present invention in which the slide portion is opened.

FIG. 8 is an enlarged partial side view showing an engaged state of the LCT stand with Joutan.

FIG. 9 is a schematic diagram showing an engagement state between the stand of the LCT of the present invention and bristles of jutan.

FIG. 10 is a top view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Large-capacity paper feeding device (LCT) 2 Mounting fixing part 3 Sliding part 4 Image forming apparatus main body 5 Plate member 6 Accuride rail 7 Stand (leg) 8 Reference pin 9 Screw mounting part 10 Paper feeding tray 11 Paper feeding part 12 Case Main body 13 Acculide rail 14 Stand 15 Transfer paper 16 Transfer paper mount 17 Paper feed roller 18 Corner claw 19 Transport roller 20 Guide 21 Floor surface 22 Jutan 23 Hair

Claims (3)

[Claims] 1. A large-capacity sheet feeding device structure, which is detachably mounted on an image forming apparatus and has a large number of transfer sheets stacked on a vertically movable sheet feeding tray. An attachment fixing portion that is removably positioned and fixed to the outside of the image forming apparatus main body, and is detachably guided to the attachment fixing portion along the sheet feeding direction, and inside the sheet feeding tray and the sheet feeding tray. And a slide portion having a paper feeding portion for feeding the transfer paper separately one by one, and a stand for supporting them is provided below the attachment fixing portion and the slide portion. Is a large-capacity sheet feeding device structure in an image forming apparatus, wherein the total number is at least three in the front and rear so as to stably support both the attachment fixing portion and the slide portion regardless of the engaging postures. 2. The stand according to claim 1, wherein the stand has a shape in which the lowermost portion of the stand is slightly separated from the floor surface when the large-capacity sheet feeder is mounted on the image forming apparatus main body. Large-capacity paper feeder structure in image forming apparatus. 3. The large-capacity sheet feeding device structure in the image forming apparatus according to claim 1, wherein the lowermost portion of the stand is formed in a substantially arc shape or a substantially spherical shape.