JPH06282134A - Packing device for sheet feeding device - Google Patents

Abstract

PURPOSE:To maintain the safety of a sheet feeding means from impact such as vibration by pressing and fixing the sheet feeding means in a reverse direction to the rotating direction thereof at the time of transporting the device by using a packing member. CONSTITUTION:In the case of attaching the packing member 19, a wide part 19a1 where a 1st bend part 19a is erected is inserted between a frame 6 and a roller guide 21 so that it may be positioned between the ribs 6a of the frame 6, and held and fixed in the up-and-down direction of the wide part 19a1. A 3rd bend part 19c is inserted under a feeding roller 3 and arranged so that the notched surface of the roller 3 can be supported by a triangular surface formed by bending. A 2nd bend part 19b is attached to be erected along the frame 6. By attaching a cassette 2 to a device main body 1 in a direction shown by an arrow in such a state, the 3rd bend part 19c is pushed aside by the upper surface 20a of an intermediate plate pressing member 20, whereby the roller 3 is pressed in a direction shown by an arrow (b)(the reverse direction to a feeding direction) simultaneously with supporting the notched surface of the roller 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device packing device for packing a sheet feeding device used for carrying an image forming apparatus such as a laser beam printer (LBP) or a copying machine. Is.

[0002]

2. Description of the Related Art Conventionally, a laser beam printer (LB
P), when the image forming apparatus such as a copying machine is transported, the feeding roller rotates due to the vibration, and when the sheet is set and the feeding operation is started in this state, feeding of jam (paper jam) etc. There was a risk of defective delivery. In addition, parts such as the feeding roller may be damaged by vibration or the like.

Therefore, in order to stop the rotation of the feeding roller, a packing material is generally attached. For example, a tape is attached to the feeding roller and fixed to the chassis, or a packing material made of a plastic material is attached and fixed around the feeding roller.

[0004]

However, in the above-mentioned prior art, when the feeding roller is fixed using a tape, for example, the adhesive adheres to the roller after the tape is peeled off, and the sheet feeding is performed. There was a risk that the sheet would wind up.

When the feeding roller is fixed with a packing material made of a plastic material, the packing material is unnecessary when the product is opened, and therefore it is an object of disposal. It might be a factor.

Further, workability is poor in attaching a tape to the feeding roller or mounting a packaging material such as a plastic material. In some cases, it is necessary to turn over the device, which may damage the parts or assemble them. There was a risk that the work would become complicated.

The object of the present invention is to solve the above-mentioned problems of the prior art, to ensure the safety of the sheet feeding means during transportation of the apparatus, to facilitate the mounting work, and to package the sheet feeding apparatus. To provide a device.

[0008]

A typical means for solving the above problems of the prior art and applied to the embodiments described below is a sheet feeding for packing a sheet feeding device for feeding a sheet. The packing device of the apparatus is characterized in that a packing member for biasing and fixing the sheet feeding means of the sheet feeding device in a direction opposite to the rotation direction is provided.

[0009]

According to the above means, the sheet feeding means is urged and fixed in the direction opposite to the rotational direction during transportation of the apparatus by using the packing member, so that the sheet feeding means can be operated even when shock such as vibration is applied. The security of the means can be maintained.

[0010]

EXAMPLE An example of the present invention in which the above means is applied to a laser beam printer will be described below. 1 is a cross-sectional view showing a schematic configuration of a laser beam printer, FIG. 2 is an explanatory view of a sheet feeding unit, FIG. 3 is a plan view of a sheet feeding unit, FIG. 4 is an explanatory diagram of a feeding roller gear, and FIG. Explanatory drawing of member, FIG.
FIG. 4 is an explanatory diagram showing a packed state of a feeding roller.

First, the overall construction of the laser beam printer will be briefly described with reference to FIG. Reference numeral 1 denotes a device body of a laser beam printer.
A box-shaped cassette 2 in which sheets P such as recording sheets are stacked and stored is detachably mounted from the right side in the drawing. Reference numeral 3 denotes a feeding roller which is a sheet feeding means, and is the cassette 2
The uppermost sheet P among the sheets P stacked and stored in the sheet is fed one by one. A pair of conveying rollers 4a and 4b conveys the sheet P fed by the feeding roller 3. Reference numeral 5 denotes a guide portion integrally formed with the frame 6 for inverting the sheet P conveyed by the pair of conveying rollers 4a and 4b and guiding it to the transfer portion.

Reference numeral 7 denotes a resist sensor, which is a sheet P.
The image is transferred to a predetermined position on the sheet P by synchronizing the leading edge position of the sheet and the light emission timing of the laser scanner 8 which is the exposure light source. Reference numeral 9 denotes a folding mirror, which is supported and fixed to a mirror holder 9a provided on the frame 6.

The laser scanner 8 oscillates a laser beam according to image information and irradiates the photosensitive drum 10 as an image carrier through a folding mirror 9 to form a latent image. The photosensitive drum 10 is mounted in a process cartridge 11 which has a plurality of process means for forming an image, such as a charging means, a developing means, a cleaning means and the like, around the photosensitive drum 10. The latent image formed on the drum surface is
Toner is attached by a developing means (not shown) provided in the cartridge 11 to form a visible image.

A transfer roller 12 is a transfer means,
It is in pressure contact with the photosensitive drum 10 and transfers the toner image formed on the drum surface onto the sheet P. Reference numeral 13 is a conveyance guide for guiding the conveyance of the sheet P after the image transfer.

A fixing device 14 is a fixing means, and is equipped with a fixing roller 14a having a heater built therein and a pressure roller 14b which is in pressure contact with the fixing roller 14a. When the sheet P conveyed on the conveyance guide 13 passes between the fixing roller 14a and the pressure roller 14b, the transfer image is fixed.

Numerals 15a and 15b are an upper guide and a lower guide which form a reverse conveyance path, and guide the sheet P after image fixing face down (image side down). The upper guide 15a is provided on the exterior cover 16 side, and the lower guide 15b is provided on the frame 6 side.

Reference numeral 17 denotes a discharge roller pair which is a sheet discharge means, and is rotationally driven by a driving means (not shown). Reference numeral 18 denotes a discharge tray formed on the upper surface cover of the apparatus for stacking the discharged sheets P.

Next, the structure of the sheet feeding portion of the above laser beam printer will be described with reference to FIGS. The sheet feeding unit in this embodiment uses a one-sided claw separation method. As shown in FIG. 2, the cassette 2 is
It is detachably attached to the apparatus main body 1 from the right side of the drawing. An intermediate plate 2a on which sheets P are stacked is provided at the bottom of the cassette 2. The sheet feeding direction side of the intermediate plate 2a is urged upward (to the feeding roller 3 side) from the back side by a compression spring 2b. Has been done. A separation claw 2c separates the uppermost sheet P from the second and lower sheets P during the feeding operation.

The feeding roller 3 is provided on the apparatus main body 1 side and has an arcuate surface and a notched surface, which are notched circumferential surfaces. When the sheet is not fed, the feeding roller 3 is stopped with the cutout surface facing the sheet P. Further, the feeding roller 3 has a projecting piece 3b projectingly provided on the rotating shaft 3a thereof, and is biased in the direction of an arrow f by a pressing member 3d rotatably mounted about a support shaft 3c. Therefore, the feeding roller 3 is biased to rotate in the direction of arrow a (feeding direction).

Further, as shown in FIG. 3, a feed roller gear 3e is attached to the rotary shaft 3a of the feed roller 3. The feeding roller gear 3e has some teeth cut out, and a gear 3f shown in FIG.
The rotary drive force is transmitted via the motor to rotate.
When the sheet feeding roller gear 3e is not fed, that is, when waiting for the sheet feeding start signal, the cutout portion is in the meshing position with the gear 3f as shown in FIG. The driving force is not transmitted and the feeding roller 3 is configured not to rotate.

As shown in FIG. 3, the feeding roller 3 is biased in the direction of arrow a by the pressing member 3d when not fed, but the notch surface is provided on the operating rod 3h of the solenoid 3g. Since it is locked by the claw 3i, the feeding roller 3
The rotation in the direction of arrow a is stopped.

Next, when a sheet feeding start signal is input,
First, the solenoid 3g is turned on and the actuating rod 3h is attracted, whereby the engagement between the claw 3i and the cutout surface of the feeding roller 3 is released. As described above, the feeding roller 3 rotates in the direction of the arrow a by the urging force of the pressure member 3d, and the feeding roller gear 3e meshes with the gear 3f, whereby the rotational driving force is transmitted to the feeding roller 3. , The sheet P is separated and fed from the uppermost sheet P stacked in the cassette 2.

Next, a packing member for packing the feeding roller 3
19 will be described with reference to FIG. As shown in FIG. 5, the packing member 19 is formed by bending one long sheet of paper into three substantially U-shaped cross sections in the lengthwise direction. First, the first bent portion 19a is bent in the horizontal direction, and further the wide portion 19a ₁ is bent so as to stand up in a concave cross-section. The interval between the wide portions 19a ₁ is smaller than the interval between the ribs 6a. The second bent portion 19b is erected on the horizontal plane. The third bent portion 19c is bent in the horizontal direction, and further bent so as to form a triangle, and the front end portion is stapled at a part P of the third bent portion 19c. It is also possible to attach with an adhesive such as glue instead of the stapler. In addition, the packing member 19
It is preferable that the material of the paper used in (1) has a thickness of about 0.5 mm to 1 mm, is hard to some extent, and is elastic.

Next, a method of attaching the packing member 19 to the feeding roller 3 will be described with reference to FIG. The cassette 2 is pulled out from the apparatus main body 1 and the packing member 19 is mounted in the direction of the arrow toward the cassette mounting direction. Therefore, the worker can easily perform the mounting work of the packing member 19. At this time, the sheets P are not stacked in the cassette 2 and the middle plate 2a is made of paper.
Is pressed against the bottom of the cassette against the biasing force of the compression spring 2b.

When the packing member 19 is attached,
The wide portion 19a _{1 in} which the first bent portion 19a is erected is inserted between the frame 6 and the roller guide 21 so that the wide portion 19a ₁ is located between the ribs 6a of the frame 6, and the vertical portion of the wide portion 19a ₁ is clamped and fixed. To do. Further, the third bent portion 19c is inserted under the feeding roller 3 and is arranged so that the notched surface of the feeding roller 3 can be supported by one surface of the triangle formed by bending. The second bent portions 19b are attached so as to stand upright along the frame 6. In this state, the first
Only the bent portion 19a is fixed to the apparatus main body, but the others are in a free state.

When the cassette 2 is mounted in the apparatus main body 1 in the direction of the arrow in this state, the third bent portion 19c is pushed up by the upper surface 20a of the middle plate pressing member 20, so that the notched surface of the feeding roller 3 is supported at the same time. It urges in the direction of arrow b (the direction opposite to the feeding direction). Since the feeding roller 3 is biased in the arrow a direction (see FIG. 2) by the pressure member 3d as described above, it does not rotate in the arrow b direction.

Therefore, when the apparatus main body is transported, vibration or impact is applied to the cutout surface of the feeding roller 3 and the claw 3 of the operating rod 3h.
Even when the locking with i is released, it is possible to prevent the feeding roller 3 from rotating and violating. Therefore, the safety of the device,
The reliability can be improved.

When the packaging member 19 is removed,
The cassette 2 is pulled out to release the pressure applied to the feeding roller 3 by the third bent portion 19c, and the first bent portion 19a is released.
It can be easily removed by pulling out between the frame 6 and the roller guide 21. Since the packing member 19 is made of paper after being removed, it can be incinerated together with general dust, which can contribute to environmental protection.

(Other Embodiments) Next, another example of the packing member 19 will be described. In this embodiment, the first bent portion 19
The distance between the wide portions 19a ₁ of a is slightly larger than the distance between the ribs 6a of the frame 6. That is, in the above embodiment, the positioning of the packing member 19 with respect to the apparatus main body 1 is performed by the first bending portion.
19a is fixed by being sandwiched vertically between the roller guide 21 and the frame 6. On the other hand, in the present embodiment, the wide portion 19a ₁ erected on the first bent portion 19a is press-fitted between the ribs 6a to perform positioning in the width direction.

Since the roller guide 21 has a thin and long shape, it may be deformed or damaged when an external force is applied by the packing member 19. As a result, there is a possibility that the conveyance performance during sheet conveyance may be deteriorated. On the other hand, the frame 6 is a molded-integral molded component and has a very high rigidity. Therefore, even if the first bent portion 19a is press-fitted between the ribs 6a, deformation or damage does not occur. Therefore, even if the packing member 19 is attached, the safety is further improved and the reliability of the device can be improved.

The present invention is not limited to the laser beam printer but may be applied to other devices such as a copying machine.

[0032]

As described above, according to the present invention, by using the packing member to urge and fix the sheet feeding means in the direction opposite to the rotation direction during transportation of the apparatus, even if a shock such as vibration is applied. The safety of the sheet feeding means can be maintained.

Further, the packing member can be attached and detached from the same direction as the attaching / detaching direction of the sheet stacking means, and the sheet stacking means can be operated while being pulled out from the main body of the apparatus, so that the workability is improved. Can be made.

Further, since the packing member after removing the packing is paper, it can be incinerated, which can contribute to environmental protection.

[Brief description of drawings]

FIG. 1 is a sectional view showing a schematic configuration of a laser beam printer.

FIG. 2 is an explanatory diagram of a sheet feeding unit.

FIG. 3 is a plan view of a sheet feeding unit.

FIG. 4 is an explanatory diagram of a feeding roller gear.

FIG. 5 is an explanatory diagram of a packing member.

FIG. 6 is an explanatory diagram showing a packed state of a feeding roller.

[Explanation of symbols]

 P ... Sheet 1 ... Device main body 2 ... Cassette 2a ... Middle plate 2b ... Compression spring 2c ... Separation claw 3 ... Feed roller 3a ... Rotating shaft 3b ... Projecting piece 3c ... Spindle 3d ... Pressing member 3e ... Feed roller gear 3f ... Gear 3g ... Solenoid 3h ... Actuating rod 3i ... Claws 4a, 4b ... Conveying roller pair 5 ... Guide part 6 ... Frame 6a ... Rib 7 ... Registration sensor 8 ... Laser scanner 9 ... Folding mirror 9a ... Mirror holder 10 ... Photosensitive drum 11 ... process cartridge 12 ... transfer roller 13 ... transport guide 14 ... fixing device 14a ... fixing roller 14b ... pressure roller 15a, 15b ... up / down guide 16 ... exterior cover 17 ... discharge roller pair 18 ... discharge tray 19 ... packing member 19a ... 1 fold section 19b ... 2nd fold section 19c ... 3rd fold section 20 ... Middle plate pressing member 21 ... Roller guide

Claims (5)

[Claims] 1. A packing device for a sheet feeding device for packing a sheet feeding device for feeding a sheet, wherein a sheet feeding means of the sheet feeding device is biased in a direction opposite to a rotational direction thereof. A packing device for a sheet feeding device, comprising a packing member for fixing. 2. A packing device for a sheet feeding device, which is mounted on a main body of an image forming apparatus, for packing a sheet feeding device for feeding a sheet, comprising: rotating a sheet feeding means of the sheet feeding device. A packing device for a sheet feeding device, comprising a packing member for urging and fixing in a direction opposite to the direction. 3. The sheet feeding according to claim 2, wherein the mounting direction of the packing member is the same as the mounting direction of the sheet stacking unit on the main body of the image forming apparatus equipped with the sheet feeding unit. Packing device for the feeder. 4. The packaging member urges the sheet feeding means when the sheet stacking means is attached to the image forming apparatus main body, and releases the urging when the sheet stacking means is removed from the image forming apparatus main body. The packing device for a sheet feeding device according to claim 3, wherein: 5. The packing device for a sheet feeding device according to claim 1, wherein the material of the packing member is paper.