KR101191439B1 - Apparatus for paper supply - Google Patents

Abstract

The present invention discloses a paper feeder that can feed paper quickly and accurately one by one.
According to an embodiment of the present invention, a first adsorption plate adhered to an outer side of a stacked uppermost paper and adsorbed is formed, and an adsorbent is adhered to the central side of the paper and adsorbed after the adsorption of the first adsorption plate is performed. Lift means consisting of two suction plates; A pair of feeding means alternately reciprocating to alternately transfer one end of the paper raised together with the lift means to be transferred to the processing position; And drive means for driving the supply means, so that each sheet of paper can be quickly and accurately lifted and supplied.

Description

Paper feeder {APPARATUS FOR PAPER SUPPLY}

The present invention relates to a paper feeder, and more particularly, to a paper feeder that improves adsorption force when feeding paper, and enables to separate and feed one sheet at a time.

In general, a packaging box or the like is widely used as a product using a paper material, and such a packaging box goes through a printing process as well as processing for bending and cutting to an appropriate standard.

In this way, a feeder having a variety of configurations is used to continuously and uniformly feed the paper into the processing apparatus, and recently, a method of adsorbing and feeding the paper through the suction means has been widely used.

However, the apparatus for supplying the paper through adsorption as described above is provided with a single adsorption means for adsorbing the paper and a supply member for pushing the paper. Therefore, the adsorption means adsorbs the paper, and then the absorbed paper is pushed by the feed member to be transferred to the processing apparatus, and is stopped until the feed member returns to its original position. Accordingly, when the supply member returns to its original position, the adsorption member adsorbs the next sheet and the supply member delivers the sheet to the processing apparatus. As a result of the repetitive operation, the feeding member is provided to transmit the paper to the processing apparatus so that the operation stop time of the adsorption means occurs, thereby reducing the efficiency of the work.

In order to solve this problem, the applicant has a plurality of feed members provided for continuous feeding in feeding paper to the processing apparatus through the "Paper Feeding Device (Registration No. 10-0959200), filed August 21, 2009." Developed a paper feeder.

However, the paper feeder of the conventional structure has a problem in that several sheets of paper are adsorbed because the adsorption plate constituting the lift means is simultaneously adsorbed on the paper. In addition, there is a limit in moving only one sheet of paper accurately.

SUMMARY OF THE INVENTION An object of the present invention devised in view of the above is to provide a paper feeding apparatus that allows the paper to be supplied to be supplied exactly one by one.

In addition, the present invention is to provide a paper feeder that can prevent the adsorption of a plurality of sheets at the same time and at the same time to accurately adsorb only one sheet of paper.

The paper feed apparatus for achieving the object of the present invention as described above is in close contact with the outer side of the paper positioned on the top of the stack and the first adsorption plate and the adsorption is carried out, in close contact with the central portion of the paper and the first Lift means comprising a second adsorption plate on which adsorption is performed after adsorption of the adsorption plate is performed; A pair of feeding means alternately reciprocating to alternately transfer one end of the paper raised together with the lift means to be transferred to the processing position; And driving means for driving the supply means.

In addition, more preferably, the lift means includes a bracket protruding to both sides of the housing fixed to the frame; A first actuator mounted to one end of the bracket to move up and down the first suction plate; And a second actuator mounted to the housing at intervals from the first actuator, and configured to raise and lower the second suction plate.

In addition, more preferably, the drive means is parallel to each other and fixed to the housing so as to be reciprocated in the longitudinal direction, a pair of racks to which the different supply means is fixed at each end; A pinion positioned to engage between the racks to move the racks; And a drive motor mounted to the housing to rotate the pinion.

In addition, more preferably, the supply means is a holder fixed to the end of the rack extending in the width direction of the paper and both ends bent downward; And a locking member coupled to an end of the holder and having a bent portion into which one side of the paper is fitted. .

Further preferably, the supply means includes first supply means fixed to an upper rack positioned above the pinion, and second supply means fixed to a lower rack positioned below the pinion. do.

Further, more preferably, the holder width of the first supply means is larger than the holder width of the second supply means so that the holder of the second supply means is movable between the holders of the first supply means.

In addition, more preferably, the engaging member is a lifting shaft which is mounted to the lifting and lowering to the holder; And the bent portion elastically supported at the end of the elevating shaft.

In addition, more preferably, the bent portion is bent end both ends bent in the same direction; A support end for slidably supporting the bent end at the end of the elevating shaft; And a spring interposed between the lifting shaft and the bending end to elastically support the bending end. .

In addition, more preferably, the lifting means for lifting the stacked paper is configured to move up and down along the frame; And support means mounted to both ends of the bracket and positioned on the side of the paper to prevent a plurality of sheets of paper from being absorbed and provided with a plurality of brushes contacting the paper.

In addition, more preferably, the housing is slidably fixed to a pivot shaft rotatably supported by the frame, and a pivot arm protrudes radially from one side of the pivot shaft, and the pivot shaft is rotatable to the pivot arm. Rotating means for rotating the pivotal arm around is connected.

In addition, more preferably, the rotating means may include a rotating motor fixed to the frame; A gear rotated by the rotation motor; And a connecting member fixed to the gear on one side and fixed to the end of the rotating arm, and selectively rotating the housing fixed to the rotating shaft by pulling the connecting member by the operation of the rotating motor. .

Further, more preferably, the rotation means further includes a stopper member for stopping the operation of the rotation motor when the rotation of the housing is completed.

In addition, more preferably, the stopper member is a screw thread that is linked to the rotation of the gear; A square screw fastened to the screw screw and moved along a length direction of the screw screw; And a detection sensor generating a stop signal for stopping the operation of the rotation motor when the square screw is detected. It includes.

In addition, more preferably, the frame has stoppers protruding from both sides of the rotational shaft, and radially protrudes from the rotational shaft so that the housing temporarily maintains the working position and the separated position. A fixed shaft is formed in contact with the stopper.

Further, more preferably, the housing is equipped with a guide slidably coupled to the pivot shaft, the pivot is mounted on the pivot shaft, and the housing is equipped with a rotary knob formed with a pinion to engage the rack on one side. do.

As described above, the paper supply apparatus according to the present invention has an effect of improving workability by enabling the paper to be supplied to be reliably fed one by one.

In addition, there is an effect that the supply speed is improved by changing the existing drive means consisting of an air cylinder to a drive motor operated by electricity. In addition, the conventional air cylinder was frozen in the air line at a low temperature there was a case in which an operation error occurs, but because the structure is operated by a drive motor there is an effect that the operation error is reduced.

In addition, the present invention is made of a structure capable of ensuring a space enough for the user to proceed manually by using a method of moving the position by rotating the housing itself when the user wants manual work, there is an effect that workability is improved. .

1 is a perspective view showing a paper feeding device which is a preferred embodiment of the present invention;
2 is a perspective view showing in detail the housing shown in FIG.
3 is a perspective view showing the inside of the housing shown in FIG. 2;
4 is a perspective view showing the inside of the housing shown in FIG. 2;
5 is a state diagram schematically showing a process in which the paper feed apparatus is operated;
6 is a state diagram showing a process in which the lift means is operated.

Hereinafter, with reference to the accompanying drawings, a paper feeder which is a preferred embodiment of the present invention will be described in detail as follows.

1 is a perspective view showing a paper feed apparatus according to an embodiment of the present invention, Figure 2 is a perspective view showing in detail the housing shown in Figure 1, Figure 3 shows the interior of the housing shown in Figure 2 4 is a perspective view showing the inside of the housing shown in FIG. 2, FIG. 5 is a state diagram schematically showing a process of operating a paper feed apparatus, and FIG. 6 is a view showing a process of operating a lift means. State diagram.

As shown in the drawing, the paper feed apparatus 10 is an elevating means 11 which moves the frame 13 and the paper 1 to be processed by being moved up and down in the vertical direction of the frame 13 to a designated position. ), A lift means (100) for lifting the stationary paper (1) at a designated position, a pair of feed means (200) for alternately transferring the end of the lifted paper (1) to a processing position, and , A driving means 300 for driving the supply means 200, a supporting means 400 for supporting the paper 1, and a rotation means 500 for tilting the housing 14.

The elevating means 11 is raised in the state where the paper is raised to move the paper 1 to the lift position of the lift means 100 which will be described later. When all the paper 1 placed on the elevating means 11 is supplied, the elevating means 11 is lowered so that the paper conveyed by the separate conveying means 12 is seated on the elevating means 11.

The conveying means 12 may be made of a rail such as a conveyor, and may be conveyed by the conveying means 12 in a state where the paper 1 is loaded on a pallet and seated on the elevating means 11. Meanwhile, the paper 1 loaded without a separate pallet may be directly transferred to the transfer means 12 and seated on the elevating means 11.

The paper 1 seated on the elevating means 11 is supplied to the separate processing apparatus one by one by the lift means 100 and the supply means from the paper 1 positioned at the top. A separate delivery means (not shown) such as a roller is also provided in the processing apparatus to transfer the paper 1 fed one by one from the sheet feeder 10 to the processing position.

That is, the elevating means 11 for moving the stacked sheets 1 is provided with the lifting means 100 as thick as the thickness of the moved sheets 1 when the uppermost sheet 1-1 of the stacked sheets is supplied to the processing apparatus. It is configured so that there is no difficulty in lifting the paper 1 by being moved upward to move closer. In addition, although not shown, the elevating means 11 is moved up and down by the elevating means provided separately.

Lift means 100 is in close contact with the outer side of the laminated sheet of paper (1) is adsorbed to the first adsorption plate 111 and the center portion of the paper 1 is in close contact with the adsorption of the first adsorption plate (111) After the second adsorption plate 121 is provided with the adsorption is provided.

In addition, the lift means 100 is mounted to the bracket 101 protruding to both sides of the housing 14 which is fixed to the frame 13, one end of the bracket 101 to raise and lower the first adsorption plate 111 The first actuator 112, and the second actuator 122 is mounted to the housing 14 so as to be positioned at a predetermined distance from the first actuator 112 and to raise and lower the second suction plate 121. As shown in the drawing, the first adsorption plate 111, the first actuator 112, the second adsorption plate 121, and the second actuator 122 are preferably configured at one end and at the center, respectively, and the first adsorption plate 111. ) And the first actuator 112 and the second adsorption plate 121 and the second actuator 122 are paired so as to be symmetrical with respect to the housing 14 for smooth adsorption of the paper 1. It may be configured. In addition, the first actuator 112 is preferably detachably mounted to the support means 400 to be described later.

When the adsorbed paper 1 spans the locking member 220 of the supply means 200, the adsorption plates 111 and 121 release the adsorption to drop the paper 1 from the adsorption plates 111 and 121.

The drive means 300 is fixed to the inside of the housing 14 to be parallel to each other and reciprocating in the longitudinal direction, a pair of rack 310 and the different supply means 200 is fixed to each end, the rack ( It is composed of a pinion 320 positioned to engage between the 310 to move the rack 310, and a drive motor 330 mounted inside the housing 14 to rotate the pinion (320). Gears that mesh with each other are formed on an outer circumferential surface of the pinion 320 and one side of the rack 310 in contact with the pinion 320. The rack 310 is composed of an upper rack 311 positioned above and a lower rack 312 positioned below the pinion 320.

The supply means 200 is fixed to the end of each rack 310, extending in the width direction of the paper 1, both ends of the holder 210 is bent toward the paper 1 and the end of the holder 210 It is composed of a locking member 220 is coupled to the bent portion 221 is formed that one side of the paper is spread over. At this time, the supply means 200 is composed of a first supply means 201 fixed to the upper rack 311 and a second supply means 202 fixed to the lower rack 312.

The width of the holder 210 of the first supply means 201 is greater than the width of the holder 210 of the second supply means 202 so that the second supply means 202 is formed between the holders 210 of the first supply means 201. The holder 210 can be moved.

Lifting shaft 222 is mounted to the end of the engaging member 220, the holder 210 to be raised and lowered, and the bent portion 221 is elastically supported on the end of the lifting shaft 222. A long hole is formed in the elevating shaft 222, and a pin is inserted into the long hole in the holder 210, and the elevating shaft 220 is raised and lowered along the long hole. The bent portion 221 includes a bent end 221a having both ends bent in the same direction, and a support end 221c for supporting the bent portion 221a so that the end of the elevating shaft 220 can move in the direction of pushing the paper. The spring 221c is interposed between the bent end 221a and the lifting shaft 220 to elastically support the bent end 221a. It is possible that the lower end of the bent portion 221 is horizontal with the paper 1 so that the paper 1 is seated on the bent portion 221.

A guide 411 is mounted to the support means 400, and the guide 411 is slidably mounted at both ends of the bracket 101 to adjust its width according to the size of the paper. The support means 400 is mounted to the guide 411 so as to be movable in the vertical direction and is elastically supported by the spring 420. In addition, the support means 400 is equipped with a plurality of brushes 410 protruding toward both sides of the paper 1 to be in contact with both sides of the paper 1 so that the paper 1 can be lifted only one sheet at a time.

In addition, the housing 14 is slidably mounted to the pivot shaft 510 rotatably supported by the frame 13, and a pivot arm 520 protruding radially protrudes from one side of the pivot shaft 510. Rotating means 500 for rotating the pivotal arm 520 about the pivotal shaft 510 is connected to the pivotal arm 520. The rotation means 500 includes a rotation motor 501 fixed to the frame 13 and a gear 502 fixed to the rotation shaft of the rotation motor 501, one side of which is fixed to the gear 502, and the other side of the rotation arm 520. It consists of a connecting member 503 fixed to the end. In the case of the gear 502, it is preferable that the connecting member 503 is configured. When the pulley is mounted instead of the gear 502, the connecting member 503 may be composed of a belt, a wire, a rope, a chain, or the like. In addition, the stopper 535 protrudes from one side of the frame 13 around the pivot shaft 510, and the fixed shaft 534 is temporarily protruded radially from the pivot shaft 510 to be temporarily supported by the stopper 535. It protrudes. By the operation of the rotation means 500, the housing 14 is capable of tilting from the working position to the position away from the working position. That is, when the operator wants to manually feed the paper while the pivoting arm 520 is supported by the stopper 535 on one side, the gear 502 is operated when the rotational motor 501 is operated. As it rotates, the connection member 503 is pulled. At this time, as the pivoting arm 520 is rotated, the pivoting shaft 510 is rotated, so that the housing 14 is out of the working position. At this time, with the rotation of the gear 502, the screw screw 531 also rotates, and the movement of the square screw 532 starts. The rotation of the threaded screw 531 causes the square screw 532 to move toward the sensing sensor 533, and when the movement to the position where the sensing sensor 533 can detect the square screw 532 is completed, the housing It is set in the same manner as when the departure of (14) is completed. When the detection sensor 533 detects the square screw 532 to generate a stop signal to stop the operation of the rotating motor 501, the operation of disengaging the housing 14 from the working position is terminated.

In addition, a shaft parallel to the rotation shaft 510 is further installed at the end of the fixed shaft 534, and a rotation shaft 510 and a guide 511 slidably coupled to the shaft are installed at the housing 14. do. The rotating shaft 510 is mounted with a rack 512, and the housing 14 is provided with a rotation knob 513 having a pinion formed at one side thereof to be engaged with the rack 512. Turning the rotary knob 513 moves the housing 14 along the rack 512 as the pinion rotates. That is, the position of the housing 14 can be moved to match the paper size.

Referring to the process of operating the paper feed device which is a preferred embodiment of the present invention configured as described above in more detail as follows.

As shown in 'a' of FIG. 5, the elevating means 11 on which the sheet of paper 1 to be fed is seated is lifted to a position that can be adsorbed by the lift means 100. At this time, when the direction in which the paper 1 is supplied is viewed in the advancing direction, the pinion 320 is positioned such that the rear end of the upper rack 311 and the front end of the lower rack 312 are engaged with each other. As shown in FIG. 5B, when the paper 1 is placed at the position where the paper 1 is able to be adsorbed due to the elevation of the elevating means 11, the first paper (the first paper having the adsorption plates 111 and 121 of the lift means 100 positioned at the top) 1-1) is adsorbed.

6, the first adsorption plate 111 positioned on the outer edge of the paper 1 is lowered, and the first adsorption plate 111 is in close contact with the paper 1, as illustrated in FIG. 6. Adsorption is carried out at. When the adsorption of the first adsorption plate 111 is completed, ascending starts, the second adsorption plate 121 is lowered, and the adsorption is performed while the second adsorption plate 121 is in close contact with the paper 1. Then, the first actuator 112 and the second actuator 122 are operated to complete the raising of the first and second adsorption plates 111 and 121.

As the adsorption and the adsorption of the first adsorption plate 111 is performed as described above, the process of descending and adsorption of the second adsorption plate 121 is sequentially performed. ) Can be easily separated. In addition, it is preferable to operate in the order that the second adsorption plate 121 is lowered in the state where adsorption of the first adsorption plate 111 is completed as described above, but in some cases, after the second adsorption plate 121 is lowered, Adsorption of the first adsorption plate 111 and the second adsorption plate 121 is carried out sequentially and ascends with a time difference so that only one sheet of the uppermost first paper 1-1 can be easily separated and adsorbed. It may be.

As described above, when the first paper 1-1 is adsorbed on the first and second adsorption plates 111 and 121, the first and second actuators 112 and 122 are moved as shown in FIG. The first and second adsorption plates 111 and 121 are raised upward. At the same time, the elevating means 11 raises the stacked sheet 1 by the thickness of the raised sheet.

As shown in FIG. 5 'D', when the first paper 1-1 is lifted to reach a position where the first paper 1-1 can be caught by the locking member 220 of the second supply member 202, the driving motor 330 is rotated. The upper rack 311 moves backward, while the lower rack 312 moves forward. That is, when the first paper 1-1 is seated on the engaging member 220 of the second supply member 202, the adsorption of the first and second adsorption plates 111 and 121 is released and fixed to the lower rack 312. The second supply member 202 pushes the first paper 1-1 and supplies it to the processing apparatus.

In addition, while the first paper 1-1 is caught and supplied to the second supply member 202, the lift means 100 is operated. In this case, as shown in FIG. 6, the first adsorption plate 111, the first actuator 112, the second adsorption plate 121, and the second actuator 122 are sequentially operated, and thus, the second paper 1-1. 2) Adsorb.

As shown in FIG. 5E, when the adsorption of the second paper 1-2 is completed, the first and second actuators 112 and 122 are operated to raise the second paper 1-2. When the second paper (1-2) is raised and placed in a position where the second paper (1-2) can be caught by the locking member (220) of the first supply member (201), the driving motor 330 is reactivated so that the upper rack (311) is advanced and the lower The rack 312 is reversed.

Accordingly, as shown in FIG. 5 'f', the first feed member 201 fixed to the upper rack 311 feeds the second paper 1-2 to the processing apparatus and simultaneously lifts the next paper 1. You are ready to make it.

This operation is repeatedly performed to feed the paper 1 to the processing apparatus side.

As described above, since the paper feed apparatus according to the present invention has a structure in which the pinion 320 is operated by the driving motor 330, it is not necessary to use pneumatic pressure as compared to the structure operated by a conventional driving cylinder, thereby reducing the pneumatic pressure. Driving can be made easily even in winter, and has a feature that less dust is generated.

In addition, in the paper supply apparatus according to the present invention, the first adsorption plate 111 and the second adsorption plate 121 sequentially adsorb the paper 1 with a time difference, and the second adsorption plate ( Since the adsorption of 121 is started, only one sheet of paper 1 positioned at the top of the stacked sheets can be easily separated and adsorbed, and the supporting means 400 supporting both sides of the sheet 1 of paper. The effect of separating and adsorbing only one sheet of paper 1 by the brush 410 is increased.

In addition, the paper feed apparatus according to the present invention, if the operator wants to carry out the paper transfer manually, by tilting the housing 14 in the working position around the rotation shaft 510, the user can proceed to manual work It will be able to secure space. In addition, since the rotation of the housing 14 is automatically controlled by the operation of the stopper member 530, ease of use is increased.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

1: paper 13: frame
100: lift means 101: bracket
111: first adsorption plate 112: first actuator
121: second adsorption plate 122: second actuator
200: supply means 210: holder
220: locking member 300: driving means
310: rack 311: upper rack
312: lower rack 320: pinion
330: drive motor 400: support means
500: means of rotation

Claims (15)

Adsorption is performed after the adsorption of the first adsorption plate 111 that is in close contact with the outer side of the stacked uppermost paper and the adsorption is performed, and the adsorption of the first adsorption plate 111 that is in close contact with the center side of the paper. Lift means (100) consisting of a second adsorption plate (121);
A pair of supply means (200) for reciprocating alternately to push one end of the paper raised together with the lift means (100) to alternately transfer it to a processing position; And
And a driving means (300) for driving the feeding means (200). The method of claim 1, wherein the lift means 100
Brackets 101 protruding to both sides of the housing 14 fixed to the frame 13;
A first actuator (112) mounted to one end of the bracket (101) to lift and lower the first suction plate (111); And
And a second actuator (122) mounted to the housing (14) at intervals from the first actuator (112) and for raising and lowering the second suction plate (121). The method of claim 2, wherein the driving means 300
A pair of racks 310 fixed to the housing 14 so as to reciprocate in the longitudinal direction in parallel with each other, and to which the supply means 200 different from each other is fixed;
A pinion (320) positioned to engage between the rack (310) to move the rack (310); And
And a drive motor (330) mounted to the housing (14) to rotate the pinion (320). The method of claim 3, wherein the supply means 200
A holder 210 fixed to an end of the rack 310 and extending in the width direction of the paper and having both ends bent downward; And
A locking member 220 coupled to an end of the holder 210 and having a bent portion 221 into which one side of the paper is fitted; Paper feed device, characterized in that consisting of. The method of claim 4, wherein the supply means 200 is the first supply means 201 is fixed to the upper rack (311) located above the pinion (320) of the rack and the lower portion of the pinion (320) And a second feed means (202) fixed to the lower rack (312) located in the sheet feeder. The method of claim 5, wherein the width of the holder of the first supply means 201 is formed larger than the width of the holder of the second supply means 202 so that the second supply means (between the holder of the first supply means 201) A paper feeder, characterized in that the holder of the 202 is movable. The method of claim 4, wherein the locking member 220 is
A lifting shaft 222 mounted to the holder 210 to be liftable; And
Paper feeding device, characterized in that consisting of the bent portion 221 is elastically supported at the end of the lifting shaft (222). The method of claim 7, wherein the bent portion 221 is
Bending ends 221a, both ends of which are bent in the same direction;
A support end 221c for slidably supporting the bent end 221a at an end of the elevating shaft 222; And
A spring interposed between the lifting shaft 222 and the bending end 221a to elastically support the bending end 221a; Paper feeder comprising a. The method of claim 2,
Lifting means (11) configured to move up and down along the frame (13) to raise the stacked sheets; And
Support means (400) mounted to both ends of the bracket (101) and provided with a plurality of brushes (410) positioned on the side of the paper and in contact with the paper to prevent a plurality of sheets of paper from being adsorbed; Paper feeder comprising a. The method of claim 2, wherein the housing 14 is slidably fixed to a rotation shaft 510 that is rotatably supported by the frame 13,
One side of the rotating shaft 510 is a rotating arm 520 protruding radially,
The pivoting arm (520) is a paper feeding device characterized in that the pivoting means for rotating the pivoting arm (520) (500) around the pivoting shaft (510) is connected. The method of claim 10, wherein the rotation means 500
A rotation motor 501 fixed to the frame 13;
A gear 502 rotated by the rotation motor 501; And
Includes; the connection member 503 is fixed to the gear 502 is the one side and the other end is fixed to the end of the rotation arm 520,
The paper feed device, characterized in that by the operation of the rotating motor (501) by pulling the connecting member (503) to selectively rotate the housing (14) fixed to the rotating shaft (510). The method of claim 11, wherein the rotating means 500
The stopper member 530 for stopping the operation of the rotation motor 501 when the rotation of the housing 14 is completed, characterized in that it further comprises a paper supply device. The method of claim 12, wherein the stopper member 530 is
Threaded screw 531 linked to rotation of the gear 502;
A square screw 532 fastened to the screw screw 531 and moved along a length direction of the screw screw 531; And
And a detection sensor (533) for generating a stop signal for stopping the operation of the rotation motor (501) when the square screw (532) is detected. The method according to claim 10, wherein the frame (13)
The stopper 532 protrudes on both sides of the rotation shaft 510, and the housing 14 is radially formed on the rotation shaft 510 so as to temporarily maintain the working position state and the separated state from the working position. A paper feeding device, characterized in that the fixed shaft 534 is formed to protrude and contact the stopper (535). The housing (14) of claim 10, wherein
The guide 511 is slidably coupled to the rotation shaft 510 is mounted,
The rotating shaft (510) is a rack (512) is mounted, the housing (14), the paper feed device, characterized in that the one side is equipped with a rotary knob (513) having a pinion to be engaged with the rack (512).

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