JPH0452192Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a paper feeder that faces a paper feeder consisting of a pair of conveyor rollers in which drawers for storing paper are provided so as to be able to move toward and away from each other. This invention relates to a paper feeding device that can be inserted, fixed, and pulled out from a position.

[Conventional technology]

In the above paper feeding device, if a paper jam occurs in the feeding means consisting of the pair of transport rollers during paper feeding, pull out the drawer containing the copy paper from the paper feeding position, and then remove the paper from the paper feeding means. Try to remove any paper left inside the device.

[Problem that the invention attempts to solve]

However, it is extremely difficult to take out the paper that is caught between the supply means, and especially when the drawer is configured so that it can be inserted and pulled out in a direction perpendicular to the paper conveyance direction. As the drawer is pulled out, the sheets of paper caught in the supply means are often torn and torn, and in such cases, it becomes even more difficult to remove the torn and remaining paper from the supply means. The problem was that it took time to clear the blockage.

[Means for solving problems]

The present invention has been developed in view of the above-mentioned circumstances, and is an extremely simple and rational improvement that allows the paper feeder installed in the main body of the image forming apparatus to be removed by one action of pulling out the drawer. The purpose of the present invention is to make it easier to clear paper jams in the image forming apparatus, and the present invention provides a system in which drawers for storing paper can be moved toward and away from each other within the main body of the image forming apparatus. Insert the paper into the feeding position facing the feeding means consisting of a pair of conveying rollers arranged so that
In the paper feeding device which is provided in a fixed and removable manner, an engaging portion is formed on an arm integral with a handle rotatably provided on the front surface of the drawer, and the drawer is inserted into the paper feeding position. and by the biasing means,
The engaging portion of the arm is engaged with an engaged portion formed on the main body side of the image forming apparatus, thereby fixing the drawer, and a lever member that operates in conjunction with the arm is attached to the main body side of the image forming apparatus. When the engaging portion of the arm is in a locked state, the lever member urges the one conveying roller toward the other conveying roller, while the rotating operation of the handle forces the engaging portion of the arm to press against the other conveying roller. The locked state of the joint is released and the drawer can be freely pulled out, and the lever member operates in conjunction with the arm to separate the one conveyance roller from the other conveyance roller, and the drawer is pulled out. The invention is characterized in that when the lever member is moved, the arm is disengaged from the lever member.

[Effect]

When the drawer is inserted into the paper feed position in the main body of the image forming apparatus, the engaging part formed on the arm integrated with the handle rotatably provided on the front surface of the drawer biases the biasing means. is engaged with the engaged portion formed on the main body side, thereby fixing the drawer, and one conveyance roller is biased against the other conveyance roller by a lever member that operates in conjunction with the arm. , This makes it possible to feed paper.

On the other hand, by rotating the handle, the locking state of the engaging portion of the arm can be released and the drawer can be pulled out, and the lever member operates in conjunction with the arm to move the one conveyance roller. It can be separated from the other conveyance roller. Thereby, when the drawer is pulled out, the linkage of the arm to the lever member is released, and if paper is jammed in the supply means, the paper can be easily taken out together with the drawer. Even if the paper is torn and remains in the supply means, it can be easily taken out because it is no longer held between the conveying rollers.

〔Example〕

Next, an embodiment in which the paper feeding device of the present invention is applied to a copying machine will be described below based on the drawings. Fig. 1 shows the entire copying machine, and Fig. 2 shows the paper feeding device A. A schematic cross section is shown.

The paper feeding device A includes a paper feeding roller 2 that feeds out copying machine (paper) a stored in a paper feeding cassette 1;
A guide 3 forming a so-called boomerang paper feeding path that bends the paper feeding path in the opposite direction to the feeding direction of the copy paper a fed out by the paper feed roller 2, and a copy paper a fed from the guide 3. It consists of a paper feeding means 5 which is a feeding means having a pair of upper and lower transport rollers 19 and 20 for feeding paper to the transfer section 4 at a predetermined timing, and the paper feeding cassette 1 is connected to the paper feeding means 5.
A drawer 7 that integrally stores the paper feed cassette 1 is provided on the front side of the copying machine main body 6 so that the paper feed cassette 1 can be inserted, fixed, and pulled out from the paper feed position facing the copying machine main body 6. It is provided so as to be slidable in the direction of the rotation axis of the paper feed roller 2.

Then, as shown in FIG. 3, an arm 10 is attached to a handle 17 so as to be rotatable around an axis 9 in the paper feeding direction on an operating section 8 formed on the front surface of the drawer 7.
In addition, when the drawer 7 is inserted into the paper feeding position, the front plate portion 11 of the copying machine main body 6
A hook (engaging portion) that locks onto the edge of the front side plate (engaged portion) 21 through the drawer opening 12 opened in the
13 is formed at the tip of the arm 10, and a spring (biasing means) 14 for biasing the hook 13 in the locking direction is connected to the arm 10, and is attached relative to the edge of the front side plate 21. A cam 15 is formed at the tip of the arm 10 to rotate the arm 10 against the biasing force of the spring 14. A fixing mechanism 16 is configured to automatically lock the hook 13 to the edge of the front plate 21 to fix the drawer 7 at the paper feeding position.

As described above, the handle 17 for operating the drawer 7 is connected to the arm 10, and the handle 17 is pulled toward the user until the arm 10 comes into contact with the stopper 18. The fixing mechanism 16 can be switched to a fixing release state, that is, an operation tool for releasing the fixing mechanism 16 is attached to the handle 1 of the drawer 7.
7 is configured for dual use.

Next, the paper feeding means 5 consists of a pair of upper and lower transport rollers 19 and 20, and the lower transport roller 20 is located at the front and rear of the copying machine main body 6, as shown in FIGS. 4 and 5. It is pivotally connected to arms 24 and 24 connected to both ends of a rotating member 23 that is pivotally supported between side plates 21 and 22, and rotates at an upper fixed position as the rotating member 23 rotates. It is configured to be able to freely switch between a conveyance state X in which the paper is in contact with the conveyance roller 19, and a separated state Y in which it is separated from the conveyance roller 19 due to its own gravity or biasing force and in which it is unable to be conveyed.

When the drawer 7 is inserted into the paper feeding position and the fixing mechanism 16 is in the fixing state, a lever (lever member) 25, one end of which is in contact with the upper end of the hook 13 of the fixing mechanism 16, is moved along its longitudinal direction. The intermediate portion of the lever 25 is pivotally attached to the front plate 21 so as to be rotatable around the axis 26 in the direction of entry and exit of the drawer 7, and a pin 28 protruding from the other end of the lever 25.
is loosely fitted into a long hole b opened at the free end of a lever 27 fixed to the rotating member 23, thereby linking the levers 25 and 27, and when the fixing mechanism 16 is in the fixing state, the While the lower conveying roller 20 is in the conveying state X, in conjunction with the operation to release the fixing mechanism 16, the lower conveying roller 20 is reversibly brought into the separated state Y by its own gravity.
A conveyance release mechanism B is configured.

In addition, 29 in the figure is the lower conveyance roller 20.
This is a stopper that limits the descent of the

According to the above configuration, when the fixing mechanism 16 is unfixed, which is inevitably performed when the drawer 7 is pulled out, the lower conveyance roller 20 of the sheet feeding means 5 is moved to the separated state Y before the drawer 7 is pulled out. Therefore, even if the copy paper a is caught between the upper and lower conveyance rollers 19 and 20, the copy paper a is removed from the drawer 7.
Even if the copy paper a is torn and torn while being pulled out of the drawer 7 and remains inside the machine, the remaining small pieces of the copy paper a can be easily taken out from the opening 12. I can do it.

FIG. 6 shows another embodiment of the transport release mechanism B, which includes a lever 25 that is rotatably operated by the handle 17 for pulling out the drawer, and a lever 27 that is connected to the rotary member 23.
These are linked by a segment gear mechanism 30, and are functionally the same as the one shown in FIG.

The present invention may be implemented in a structure in which the direction of entry and exit of the drawer 7 is aligned with the paper feeding direction, or may be implemented in a paper feeding form in which the copy paper a is stored in the drawer itself.

[Effect of idea]

As explained above, the paper feeding device of the present invention performs one operation when pulling out a drawer, that is, pulling the handle for pulling out the drawer to release the fixation from the fixing mechanism, and the subsequent operation to pull out the drawer. In connection with the pulling operation, the first feature is that, together with the unfixing operation, the pair of conveyance rollers constituting the supplying means are relatively separated, and the paper is removed by the supplying means. When pulling out a drawer in the event of a jam, by switching the fixing mechanism to the unlocked state before pulling out the drawer, the pair of transport rollers will be switched to the separated state, so all that is left to do is to pull out the drawer. The paper that has been caught in the supply means can be removed from the apparatus, or even if the paper is torn and a portion remains inside the supply means, this can be done very easily and easily because the transport rollers are separated. can be removed.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall perspective view of a copying machine, Fig. 2 is a schematic sectional view of the paper feeder section, Fig. 3 is a sectional view of the fixing mechanism section, and Fig. 4 is a cross-sectional view of the fixing mechanism section. A plan view of the transport release mechanism portion, and FIG. 5 is a side view of the same. FIG. 6 is a side view of the transport release mechanism portion of another embodiment. 5... Supply means, 7... Drawer, 14... Urging means, 16... Fixing mechanism, 17... Handle (operating tool for releasing fixation), 25... Lever member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A paper feed position where a drawer for storing paper faces a supply means consisting of a pair of conveyance rollers provided in the main body of the image forming apparatus so as to be able to move toward and away from each other. A paper feeding device that can be inserted, fixed, and pulled out from a paper feeder, wherein an engaging portion is formed on an arm integrated with a handle rotatably provided on the front surface of the drawer, and the drawer When the arm is inserted into the paper position, the engaging part of the arm is engaged with the engaged part formed on the main body side of the image forming apparatus by the biasing means, and the drawer is fixed. A lever member that operates in conjunction with the arm is provided on the main body side of the image forming apparatus, and the one conveyance roller is brought into contact with the other conveyance roller by the lever member when the engaging portion of the arm is in a locked state. On the other hand, when the handle is rotated, the locking state of the engaging portion is released and the drawer can be freely pulled out, and the lever member operates in conjunction with the arm to transport the one of the drawers. A paper feeding device characterized in that when the roller is separated from the other conveyance roller and the drawer is pulled out, the arm is disengaged from the lever member. (2) Utility model registration claim No. (1) in which the drawer can be freely moved in and out in a direction perpendicular to the paper conveyance direction.
Paper feeding device as described in section.