TWI833454B - Paper feeding device and paper feeding method - Google Patents

Abstract

The present invention provides a paper feeding device capable of separately feeding paper sheets one by one even if the paper is thin. The paper feeding device includes: a paper feeding plateform for loading papers; a guiding plate vertically arranged on the paper feeding plateform and abutting against the front edges of the loaded papers; a rear guiding plate having an abutting surface to abut against the trailing edges of the loaded papers; a suction hole facing downwardly for sucking the papers; a suction pump for supplying negative pressure to the suction hole; a paper feeding roller for moving the paper along or opposite the paper feeding direction; a support hook for supporting the stacked papers while the front sides of the papers are protruding beyond the paper feeding plateform; and a paper trailing edge storage section arranged between the lower end of the abutting surface and the paper feeding plateform. The suction pump sucks the most-bottom paper of the loaded papers, retracts the trailing edge of the most-bottom paper, stores it in the paper trailing edge storage section, and then moves it forwardly.

Description

Paper feeding device and paper feeding method

The present invention relates to a paper feeding device and a paper feeding method for feeding paper one by one, such as a printing device and a stamping device, and particularly to a paper feeding device and a paper feeding method for thin paper.

In the past, the most widely used paper feeding device for feeding paper in printing machines and other machines is the following paper feeding device: the loaded paper is placed on the paper feeding table and contacts the edge of the downstream side of the vertical guide plate, and the paper is fed from the lower side. Paper is fed one by one using a roller (for example, see Patent Document 1).

The paper feeding device 9 of Patent Document 1 (please refer to FIG. 6 ) is used to feed thick paper X such as corrugated cardboard. It passes the bottom paper X1 of the thick paper X loaded between the guide plate 902 and the rear guide plate 905 through the feed The suction holes 12 of the paper table 11 are sucked downward, and the paper is transported downstream through the gap 22 between the paper feed table 11 and the guide plate 902 through the paper feed roller 13 .

[Patent Document 1] Japanese Patent Publication No. 2016-50071

However, in the paper feeding device 9 of Patent Document 1, the height of the gap 22 is adjusted to allow only one piece of thick paper X to pass; if the paper becomes thinner, the height of the gap 22 must be adjusted to allow only one piece of paper to pass. More difficult.

The present invention has been made in view of the above problems, and an object thereof is to provide a paper feeding device that can separate and feed paper sheets one by one even if the paper sheets are thin.

In order to solve the above problems, the paper feeding device of the present invention sequentially feeds paper loaded in the up and down direction in the thickness direction from below, and includes: a paper feeding table, a guide plate, a rear guide plate, a suction hole, a suction pump, and a paper feeding device. Conveyor belt, servo motor, support piece, paper trailing edge storage part and control part. The paper feeding table is loaded with paper; the guide plate is vertically installed on the paper feeding table and contacts the front edge of the loaded paper; the rear guide plate has a contact surface to contact the rear edge of the loaded paper; the suction hole is directed toward The paper is sucked downward; the suction pump supplies negative pressure to the suction hole; the paper feeding conveyor belt moves the paper to the front or rear of the paper feeding direction, and is transported by the paper feeding roller or belt The paper feeding conveyor belt is composed of a servo motor to rotate and drive the paper feeding conveyor belt; the support piece supports the stacked paper in a state where the front lower end is away from the paper feeding table; the paper trailing edge storage part is resisted by the rear guide plate The gap formed between the lower end of the interface and the paper feeding table is formed; the control part controls the servo motor and the suction pump. The control part controls the servo motor and the suction pump in the following manner: the suction pump sucks the bottom layer of the loaded paper, and the servo motor makes the trailing edge of the bottom layer of paper retreat and store it in the paper trailing edge storage part , and then make it move forward.

As mentioned above, the paper feeding device of the present invention uses a support piece to support the lower edge of the front side of the loaded paper bundle to move it away from the paper feeding table, and attracts the lowest layer of paper among the loaded paper downwards to make it retreat. Then it advances, so even if the paper is thin, it can be separated and fed one by one, and it prevents multiple sheets of paper from being misfed at one time.

In the paper feeding device of the present invention, the rear guide plate has a collision surface provided behind the paper trailing edge receiving part; the control part preferably controls the servo motor so that the bottom layer of paper sent to the rear contacts the After the collision surface, the bottom paper is transported to the front in the paper feeding direction.

In this way, since there is a collision surface at the rear of the paper trailing edge storage portion, the lowest layer of paper sent to the rear will be transported to the front in the paper feeding direction after contacting the collision surface, so that the fed paper can be The intervals in the conveying direction are indeed aligned.

The front end of the support piece is preferably inclined downward. This makes it easier to pull out the fed paper from the rear.

The angle θ between the upper surface of the support piece and the guide surface on the guide plate that abuts the front edge of the paper is preferably between 80 degrees and less than 100 degrees. This prevents the loaded paper from falling apart.

The paper feeding method of the present invention uses a paper feeding device to sequentially feed paper loaded in the up and down direction of thickness from below. The paper feeding device includes: a paper feeding table, a guide plate, a rear guide plate, a suction hole, a suction pump, Paper feeding conveyor belt, servo motor, support piece and paper trailing edge storage part. The paper feeding table is loaded with paper; the guide plate is vertically installed on the paper feeding table and contacts the front edge of the loaded paper; the rear guide plate has a contact surface to contact the rear edge of the loaded paper; the suction hole is directed toward The paper is sucked downward; the suction pump supplies negative pressure to the suction hole; the paper feeding conveyor belt moves the paper to the front or rear of the paper feeding direction, which is composed of a paper feeding roller or a belt conveyor belt; the servo motor rotates and drives the paper feeding Conveyor belt; the support piece supports the lower end of the front side of the bundled stacked papers when they are separated from the paper feeding table; the paper trailing edge storage portion is formed by the lower end of the abutting surface of the rear guide plate and the paper feeding table. In this paper feeding method, the suction pump sucks the bottom layer of the loaded paper, and the servo motor retracts the trailing edge of the bottom paper and stores it in the paper trailing edge storage portion, and then advances it.

In the paper feeding method of the present invention, the rear guide plate of the paper feeding device preferably has a collision surface provided behind the paper trailing edge receiving part, and the bottom layer of paper sent to the rear through the servo motor abuts After the collision surface, the bottom layer of paper will be transported forward in the paper feeding direction through the servo motor.

The paper feeding device and paper feeding method of the present invention are as described above. Even if the paper is thin, the paper can be fed separately one by one, which can avoid accidentally feeding paper when multiple sheets of paper overlap.

1: Paper feeding device body

1a:top

11:Feeding table

11a:Above

12:Suction hole

13:Feeding roller

100: Paper feeding device

2: Guide plate

21:Guide surface

22: Gap

3:Rear guide plate

31: Contact surface

32:Paper trailing edge storage part

33: Chasing the face

34:hook

35: Hand turns the handle

4:Horizontal pallet

5: Support hook

51:Vertical part

52:Support piece

52a:top

53:Screw substitutes

6:Sliding board

61: long hole

62: Hexagon socket screw

X:paper

X1: bottom paper

X1a: leading edge

X1b: trailing edge

Xa: leading edge

Xb: trailing edge

Xc: lower edge

Y: Conveyor belt

FIG. 1 is a side view of the paper feeding device in use according to an embodiment of the present invention.

Fig. 2 is an enlarged front view showing the main parts of the lower end of the guide plate in Fig. 1;

Fig. 3 is an enlarged side view showing the main parts of the lower end of the guide plate in Fig. 1;

Fig. 4 is an enlarged side view showing the main parts near the guide surface of the rear guide plate in Fig. 1;

FIG. 5 is an explanatory diagram of a state when paper is fed by the paper feeding device of FIG. 1 .

Figure 6 is a side view of a conventional paper feeding device.

The embodiments of the present invention will be described in detail below with appropriate reference to the drawings. However, the present invention is not limited to the following embodiments.

FIG. 1 shows a paper feeding device 100 according to a first embodiment of the present invention. The paper feeding device 100 is used for feeding paper on post-processing devices such as printing presses and stamping devices. It feeds paper X loaded in the up and down direction in the thickness direction sequentially from below. It mainly includes the paper feeding device body 1 and a guide plate. 2 and rear guide plate 3. The symbol Y in Figure 1 refers to the conveyor belt that transports the paper X to the post-processing device.

The paper feeding device body 1 includes: a horizontal plate-shaped paper feeding platform 11; a suction hole 12 that sucks the fed paper X downward; a suction pump (not shown) that supplies negative pressure to the suction hole 12; The feed rollers (feed conveyor belts) 13, 13,... that move forward or backward in the paper feeding direction; the servo motors that rotate the feed rollers 13, 13,... (Fig. (not shown); and the control unit (not shown). This structure transports the paper X loaded on the upper surface 11a of the paper feeding table 11 to the front and rear in the paper feeding direction.

The guide plate 2 is in the shape of a long plate as shown in Figures 2 and 3, and is suspended from the horizontal pallet 4 across the paper feeding table 11 above the upper surface 11a of the paper feeding table 11, so that the thickness direction of the plate is consistent with the paper feeding direction. (Depth direction in Figure 2). The lower end of the guide plate 2 is close to the surface upstream in the paper feeding direction (the front side of the paper in FIG. 2, the right side in FIG. 3), and a guide surface 21 is provided on the upper side thereof and is inclined toward the upstream side in the paper feeding direction.

As shown in Figure 2, two guide plates 2 are spaced apart in the width direction of the paper feeding table 11. The distance between the two guide plates 2 and the paper feeding gap 22 can be appropriately changed according to the size and thickness of the paper X. The paper feeding gap 22 is formed by the gap between the guide plate 2 and the paper feeding table 11 . The guide plate 2 includes a pair of left and right support hooks 5 and 5 that support the stacked sheets of paper X in a state where their front lower edge Xc is separated from the paper feeding table 11 .

As shown in Figures 2 and 3, the support hook 5 is fixed to the inner side of the guide plate 2 with screws through the sliding plate 6. The support hook 5 is formed by bending a plate into an L shape, and has a vertical part 51 and a support piece 52 bent forward relative to the vertical part 51. A screw substitute 53 bent at a right angle is passed from the side of the vertical part 51 Fixed to sliding plate 6.

The sliding plate 6 is fixed to the side surface of the guide plate 2 by means of hexagon socket screws 62 through elongated holes 61 extending up and down. The support hook 5 can adjust the height from the paper feeding table 11 to the support piece 52 by loosening the hexagon socket screw 62 to allow the sliding plate 6 to slide up and down. It is preferable that the upper surface 52a of the support piece 52 has its front end inclined downward, and the angle θ between the upper surface 52a and the guide surface 21 is preferably 80 degrees or more and 100 degrees or less. This makes it easier to pull out paper X from the rear.

As shown in FIG. 4 , the rear guide 3 includes: a contact surface 31 that contacts the rear edge of the loaded paper X; a paper trailing edge receiving portion 32 formed by a gap provided on the lower side of the contact surface 31; The collision surface 33 behind the paper trailing edge storage portion 32; the hook 34 for pulling up the trailing edge of the loaded paper X in a bundle; and the hand turning handle 35 (see Figure 1). The contact surface 31 can move forward and backward by turning the handle 35 by hand. The upper side of the contact surface 31 is inclined rearward and is arranged to be substantially parallel to the guide surface 21 of the guide plate 2, and the inclination angle can be changed.

As shown in FIG. 5(a) , when using the paper feeding device 100 , firstly, the front edge Xa of the bundle of paper sheets The lower edge Xc is placed on the support piece 52 of the support hook 5 and is thus placed between the guide plate 2 and the rear guide plate 3 .

In this state, the paper feeding operation of the paper feeding device 100 is started. As shown in FIG. 5(b) , the suction pump will start to operate, so that the bottom paper X1 of the loaded paper X is sucked through the suction hole 12. At the same time, the servo The motor will also start to rotate the paper feed roller 13 backward to pull out the bottom layer of paper X1 from the rear. The front edge X1a of the pulled-out bottom layer paper X1 will separate from the support piece 52, and the rear edge X1b will retreat and be stored in the paper trailing edge storage portion 32 and then touch the collision surface 33. The suction pump continuously attracts the bottom paper X1 with a certain pressure from the beginning to the end of paper feeding.

As shown in Figure 5(c), when the bottom layer of paper X1 hits the collision surface 33, the servo motor and the paper feed roller 13 will be controlled to reverse, so that the bottom layer of paper X1 advances and passes through the paper feeding gap. 22 and then transported to the conveyor belt Y on the downstream side.

The paper feeding device and paper feeding method of the present invention are as described above, but are not limited to the above embodiments. For example, the number of supporting pieces is not limited to two pieces, but may also be one piece or three or more pieces. It is also not necessary to provide a collision surface on the rear guide plate. The paper feeding conveyor belt is not limited to the paper feeding roller, and may also be a belt conveying belt composed of an endless belt. The front end of the support piece does not need to be inclined downward, and the angle between it and the guide surface can also be less than 80 degrees or more than 100 degrees. The guide surface does not need to be inclined.

1: Paper feeding device body

11:Feeding table

11a:Above

12:Suction hole

13:Feeding roller

100: Paper feeding device

2: Guide plate

21:Guide surface

3:Rear guide plate

31: Contact surface

32:Paper trailing edge storage part

33: Chasing the face

34:hook

35: Hand turns the handle

5: Support hook

52:Support piece

X: paper

Y: Conveyor belt

Claims (4)

A paper feeding device, which feeds a stack of stacked papers loaded in the up and down direction in the thickness direction sequentially from below, including: a paper feeding table, which is loaded with the paper; a guide plate, which is vertically installed on The paper feeding table is in contact with the front edge of the loaded paper; a rear guide plate has a contact surface to contact the rear edge of the loaded paper; a suction hole is used to attract downwards The paper; a suction pump, which supplies negative pressure to the suction hole; a paper feeding conveyor belt, which moves the paper to the front or rear of the paper feeding direction, and is composed of a paper feeding roller or a belt conveyor belt; A servo motor is used to rotate and drive the paper feeding conveyor belt; a support piece is fastened to support the lower front end of the stacked papers in a state where they are separated from the paper feeding table; a paper trailing edge storage part is fastened to It is composed of a gap provided between the lower end of the contact surface of the rear guide plate and the paper feeding table; and a control part that controls the servo motor and the suction pump; wherein, the control part controls the servo motor and the suction pump. The method of the suction pump is as follows: the suction pump attracts a bottom layer of the loaded paper, and the servo motor makes the trailing edge of the bottom layer of paper retreat and store it in the paper trailing edge storage part, and then moves it forward; wherein , the lower end of the guide plate is provided with a guide surface inclined toward the upstream side of the paper feeding direction, and the upper side of the abutment surface is inclined toward the rear of the paper feeding direction; wherein, the rear guide plate has a collision surface, the The collision surface is provided behind the rear edge storage portion of the paper; the control unit controls the servo motor to contact the bottom layer of paper sent to the rear with the collision surface and then transport the bottom layer of paper to the paper feeding direction ahead. In the paper feeding device of claim 1, the front end of the support piece is inclined downward. In the paper feeding device of claim 1, the angle θ between the upper surface of the support piece and the guide surface on the guide plate that abuts the front edge of the paper is 80 degrees or more and 100 degrees or less. A paper feeding method uses a paper feeding device to sequentially feed a bundle of stacked papers loaded in the up and down direction in the thickness direction from below. The paper feeding device includes: a paper feeding table, which is loaded with the paper; A guide plate, which is vertically installed on the paper feeding table and contacts the front edge of the loaded paper; a rear guide plate, which has a contact surface to contact the rear edge of the loaded paper; a A suction hole, which sucks the paper downward; a suction pump, which supplies negative pressure to the suction hole; a paper feeding conveyor belt, which moves the paper to the front or rear of the paper feeding direction, and is driven by the paper feeding roller Or a belt conveyor belt; a servo motor that rotates and drives the paper feeding conveyor belt; a support piece that is attached to support the lower front end of the stacked paper sheets in a state where they are separated from the paper feeding table; and A paper trailing edge storage portion is formed by a gap between the lower end of the abutting surface of the rear guide plate and the paper feeding table; wherein, the suction pump attracts a bottom layer of paper loaded, and the The servo motor retracts the trailing edge of the bottom layer of paper and stores it in the paper trailing edge storage portion, and then advances it; wherein, the lower end of the guide plate is provided with a guide surface that is inclined toward the upstream side of the paper feeding direction, The upper side of the contact surface is inclined toward the rear of the paper feeding direction; wherein, the rear guide plate has a collision surface, and the collision surface is provided behind the paper trailing edge receiving portion; the paper feeding device will pass through the servo The motor will transport the bottom paper sent to the rear toward the front of the paper feeding direction through the servo motor after the bottom paper is brought into contact with the collision surface.