JP2018138481A - Sheet supply device and box making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet supply device and a box making machine capable of suppressing scratching of a sheet being conveyed and improving durability performance of a table portion supporting the sheet.SOLUTION: The sheet supply device includes: a delivery mechanism which delivers a lowermost sheet 10a-1 from a sheet 10a in the stacked state by a delivery member 15; a table portion 11a which separates the sheet 10a-1 from the delivery member 15 at a position higher than a delivering position L0 which is the upper edge height of the delivery member 15 and brings the sheet 10a-1 into contact with the delivery member 15 at a position lower than the delivering position L0; a plurality of driving devices 16 which ascend and descend the table portion 11a; and a control device. The table portion 11a extends in a sheet supply direction A.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sheet supply apparatus that sends a lowermost sheet from a stacked sheet to a sheet processing unit, and a box making machine using the sheet supply apparatus.

2. Description of the Related Art Conventionally, a sheet supply apparatus is used that stacks sheets such as corrugated cardboard sheets and sequentially feeds the stacked sheets from the bottom to subsequent equipment.
A typical sheet supply apparatus is, for example, a wheel that feeds the lowermost sheet of stacked sheets to a subsequent facility, and is disposed between the sheets and the wheel. And a great for adjusting the contact and separation.

In such a sheet supply apparatus, while the lowermost sheet is being sent out, the remaining sheets other than the lowermost sheet among the stacked sheets hang down. In other words, at the position where the rear end of the lowermost sheet has passed, a gap is generated between the remaining sheet group and the wheel so that the lowermost sheet is removed, and the rear end side of the remaining sheet group falls into this gap. The sagging occurs. When such a sag occurs, the lower surface of the remaining sheet group in the stopped state, that is, the lower surface of the second layer sheet from the bottom may rub against the rotating wheel and be damaged.
As a sheet supply apparatus that can prevent such a remaining sheet group from drooping, there are apparatuses disclosed in Patent Document 1 and Patent Document 2, for example.

  Hereinafter, the reference numerals used in Patent Documents 1 and 2 are shown in parentheses with reference to each of the paper feeding apparatuses disclosed in Patent Documents 1 and 2.

A paper feeder disclosed in Patent Document 1 (see FIG. 4 and the like) includes a plurality of paper feed rollers (31 to 34) arranged in the sheet supply direction, a plurality of lifters (51 to 54), and a lifter (51 To 54) and lifter driving means (51M to 54M) for moving up and down.
These lifters (51-54) are arranged side by side in the sheet supply direction, and each lifter (51-54) has a substantially triangular prism structure extending in the sheet width direction, with the corners directed in the sheet supply direction. It is installed with the posture.
The lifters (51 to 54) are lifted and lifted by lifter driving means (51M to 54M) in the order of removal from the rear end of the lowermost sheet-like work (2) fed by the paper feed rollers (31 to 34). The lifters (51 to 54) that are used limit the lowering of the remaining sheet group above the lowermost sheet-like work (2).

  A paper feeder disclosed in Patent Document 2 (see FIGS. 2 to 6 and the like) includes an endless belt (3) disposed below a laminated body (12) of plate-like objects (4), and a roller ( 11) and a small rod (9) that can be swung. A plurality of small rods (9) are provided at intervals in the sheet supply direction of the plate-like object (4) by the endless belt (3), and the rear edge (4b) of the lowermost plate-like object (4a) passes therethrough. Then, the small rod (9) is swung sequentially, and the remaining plate-like object on the plate-like object (4a) is supported by the roller (11) at the tip.

Japanese Patent No. 5081703 Japanese Patent No. 2617687

In the paper feeder disclosed in Patent Document 1, since the lifter is provided with a gap in the sheet supply direction, the lifter has an elongated shape with a short dimension in the sheet supply direction. Since the load of the workpiece is supported with a small contact area, the load is increased. As a result, it cannot be said that the lifter has sufficient durability performance.
Further, the lifter has a substantially triangular prism structure, and is provided in a posture in which corners are directed in the sheet supply direction and at intervals in the sheet supply direction. Since the sheet-like workpiece is conveyed on the lifter while being pressed against the lifter from above by the load of the remaining sheet group, this sheet-like workpiece has come to collide with or rub against the corner of the lifter, Sheet-like workpieces are easily damaged.
Also in the paper feeding device disclosed in Patent Document 2, a plurality of small rods that support the plate-like object are provided at intervals in the sheet supply direction, and thus, similar to the paper feeding device disclosed in Patent Document 1 The durability performance of small rods is not sufficient.

  The present invention was devised in view of the above-described problems, and can suppress the damage of the sheet being conveyed and can improve the durability of the table portion that supports the sheet. And to provide a box making machine.

  (1) In order to achieve the above object, a sheet feeding apparatus of the present invention includes a feeding member, and a feeding mechanism that extracts a lowermost sheet from a stacked sheet and feeds it to a sheet processing unit by the feeding member. The lowermost sheet is separated from the feeding member at a position higher than the feeding position, which is the height of the upper edge of the feeding member, and the lowermost sheet is moved to the feeding member at a position lower than the feeding position. A table unit to be brought into contact with, a plurality of drive units that drive the table unit up and down at different drive positions with respect to the sheet supply direction, and a control unit that individually controls the operations of the plurality of drive units, The section extends in the sheet supply direction.

(2) It is preferable that the control device controls the operation of the plurality of driving devices to drive the table portion up in order from the driving position through which the rear end of the lowermost sheet has passed.

(3) It is preferable that the control device controls the timing of the elevation drive of the table unit based on the weight of the seat.

(4) It is preferable that the control device controls the timing of the elevation drive of the table unit based on the length of the sheet in the sheet supply direction.

  (5) It is preferable that the feeding member is provided without a gap when viewed from the sheet width direction orthogonal to the sheet feeding direction.

  (6) A leg portion protruding downward from each of the driving positions of the table portion is provided, and each of the plurality of driving devices is interposed between a servo motor and the servo motor and the leg portion. It is preferable to have a power transmission mechanism.

  (7) As the plurality of drive devices, a first drive device that performs the lift drive at a first drive position, and a second drive device that performs the lift drive at a second drive position ahead of the first drive position. It is preferable that the table portion is integrally formed with respect to the sheet feeding direction and configured to be able to tilt forward.

  (8) The control device individually controls the operation of the first drive device and the second drive device, so that the table portion is moved to the second drive device before starting the feeding of the lowermost sheet. When starting the feeding of the lowermost sheet by raising the lowermost sheet so that the lowermost sheet is not brought into contact with the feeding mechanism at both the first driving position and the second driving position. The table portion is in a lowered state in which the lowermost sheet is brought into contact with the feeding mechanism by lowering the table portion at both the first driving position and the second driving position than the feeding position, After the trailing edge of the sheet has passed the first driving position, the table portion is made higher than the feeding position at the first driving position, and the remaining sheet group as the remaining sheets is set to the table. It is preferable that the anteversion state supported by.

  (9) When the control device receives a signal indicating that the sheets are stacked on the table unit, the control unit preferably places the table unit in the raised state.

  (10) When the control device receives a signal indicating that the stacking of the sheet on the table unit is completed, it is preferable that the table unit is once tilted forward.

  (11) In order to achieve the above object, a box making machine of the present invention is characterized by including the sheet feeding device according to any one of (1) to (10).

While the lowermost sheet is being sent out, a gap corresponding to the thickness of the lowermost sheet is formed between the second sheet from the bottom and the feeding mechanism behind the rear end of the lowermost sheet.
According to the present invention, if the table unit is driven up by the driving device in order from the driving position through which the trailing edge of the lowermost sheet has passed, the second lowermost sheet is rearward from the trailing edge of the lowermost sheet. The sheet is supported by the table portion.
Therefore, the lower surface of the remaining sheet from which the rear end of the lowermost sheet is extracted can be prevented from falling into the gap, and the lower surface of the second sheet from the bottom is damaged by coming into contact with the feeding mechanism. Can be prevented.
In addition, since the table portion extends in the sheet supply direction, there is no gap in the sheet supply direction in the table portion, and the rigidity of the table portion can be improved by the amount of the gap and the stacking state The load of the sheet can be received over a wide area. Therefore, the durability performance of the table portion can be improved as compared with the conventional case.
Furthermore, since the end face is not formed in the table portion in the sheet supply direction due to the gap, it is possible to prevent the sheet being conveyed from being damaged due to contact with the end face.

It is a lineblock diagram showing the box making machine concerning a 1st embodiment of the present invention by side view. It is a typical principal part side view of the paper feeder which concerns on 1st Embodiment of this invention. (A)-(d) is a typical principal part side view for demonstrating operation | movement of the paper feeder of 1st Embodiment of this invention. It is a typical principal part side view of the paper feeder which concerns on 2nd Embodiment of this invention. It is a typical principal part side view of the paper feeder which concerns on 3rd Embodiment of this invention. It is a typical principal part side view of the paper feeder which concerns on 4th Embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment. The configurations of the following embodiments can be implemented with various modifications without departing from the spirit thereof.
In the following description, an example will be described in which the sheet feeding apparatus of the present invention is applied to a corrugated sheet feeding apparatus provided in a box making machine. In the following invention, the downstream side in the sheet supply direction A is defined as the front, the upstream side is defined as the rear, the left and right are defined with respect to the front, the vertical lower side is defined as the lower side, and the vertical upper direction in the opposite direction is defined as the upper side. A direction orthogonal to the sheet supply direction A is referred to as a sheet width direction.

[1. First Embodiment]
[1-1. Box making machine configuration]
A box making machine according to a first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a configuration diagram showing a box making machine according to a first embodiment of the present invention in a side view.
In FIG. 1, the process of processing the plate-like corrugated cardboard sheet 10a into the box-making sheet material 10 is shown separately from the apparatus configuration above the apparatus configuration. As shown in FIG. 1, this box making machine is provided with a sheet feeding unit 1, a printing unit 2, a sheet discharging unit 3, a die cutting unit 4, a folding unit 5, and a counter ejector unit 6 in order from the rear to the front. It has been. The printing unit 2, the paper discharge unit 3, the die cut unit 4, and the folding unit 5 correspond to a sheet processing unit of the present invention in which a sheet is sent out from the paper feeding unit 1.

In the paper feeding unit 1, a large number of cardboard sheets 10 a are loaded and supplied to the printing unit 2 one by one.
The printing unit 2 includes printing units 2a to 2d having a predetermined number of colors, here, four colors. In the printing unit 2, ink of each color is sequentially printed on the cardboard sheet 10a conveyed one by one by the conveying conveyor 20. .

  In the paper discharge unit 3 and the die cut unit 4, the cardboard sheet 10a printed by the printing unit 2 performs grooving and ruled line insertion. That is, the paper discharge unit 3 performs grooving and ruled lines, and the die cut unit 4 performs punching and punching of hand holes and air holes.

  Then, the folding unit 5 is bent so that the left and right ends of the corrugated cardboard sheet 10a are overlapped on the back side, that is, the lower side of the corrugated cardboard sheet 10a by being glued to the glue margin at one end in the left and right direction of the corrugated cardboard sheet 10a. And the left and right ends of the folded corrugated cardboard sheet 10a are bonded with glue to form a box-making sheet material 10.

  In the counter ejector section 6, the sheet-making sheet material 10 processed in the folding section 5 is loaded on the stacker while counting. When a predetermined number of sheet-making sheet materials 10 are stacked, the sheet material group 50 is shipped as one unit.

[1-2. Paper feeder]
[1-2-1. Configuration of paper feeder]
Next, with reference to FIG. 2, the configuration of the paper feeding device 1M provided in the paper feeding unit 1 will be described.
FIG. 2 is a schematic side view of the main part of the sheet feeding device 1M according to the first embodiment of the present invention.
As illustrated in FIG. 2, the sheet feeding device 1 </ b> M includes a great 11, a front guide 12, a backstop 13, feed rolls 14 and 14, a plurality of wheels 15, and a plurality of driving devices that drive the great 11 up and down. 16 and a control device 100 that controls the operation of the drive device 16.

The great 11 is integrally provided with a grid-like table portion 11a on which the corrugated cardboard sheet 10a is placed and leg portions 11b and 11c protruding downward from the table portion 11a.
In the present embodiment, the table portion 11a is formed in a single plate member with an opening through which an upper edge of a wheel 15 described later can protrude, but both ends in the sheet width direction are along the sheet supply direction A. It is extended. That is, both ends in the sheet width direction are formed without a gap from the front end to the rear end. In the present invention, “the table portion extends in the sheet feeding direction” means that at least a part of the region divided along the sheet width direction is formed from the front end to the rear end without a gap. .
The leg portion 11b is attached to the table portion 11a at the rear first driving position P1, and the leg portion 11c is attached to the table portion 11a at the second driving position P2 ahead of the first driving position P1. A driving device 16 is attached to each of the legs 11b and 11c. The table 11a is moved up and down individually at the first driving position P1 and the second driving position P2 by the driving device 16 via the legs 11b and 11c. Driven.
Note that two leg portions 11b and 11c are provided at intervals on the left and right.

  Hereinafter, when the lowermost corrugated cardboard sheet 10a among the plural corrugated cardboard sheets 10a stacked on the table portion 11a is particularly meant, it is referred to as the corrugated cardboard sheet 10a-1, and the second corrugated cardboard sheet 10a is particularly When it means, it describes with corrugated cardboard sheet 10a-2. Of the corrugated cardboard sheets 10a stacked on the table portion 11a, the one excluding the corrugated cardboard sheet 10a-1 is referred to as a remaining sheet group 10A. The remaining sheet group 10A includes not only a plurality of sheets but also a single sheet.

  Stacked corrugated cardboard sheets 10 a are placed on the great 11, and the corrugated cardboard sheets 10 a have their front edges in contact with the front guide 12 and their rear edges in contact with the backstop 13 in the sheet supply direction A. Restricted position. Further, the position in the sheet width direction is regulated by a side guide (not shown).

  A front guide 12 is mounted in front of the wheel 15 and the great 11 with the lower edge disposed about one sheet above the upper surface of the great 11. In addition, feed rolls 14 and 14 that are paired up and down are provided in front of the front guide 12 so as to be separated from each other by about one sheet. Further, downstream of the feed rolls 14, 14 are equipped with a conveyor belt 21 and a conveyor roll 22 of the conveyor 20 of the printing unit 2.

In the table portion 11a formed in a lattice shape, a plurality of gaps arranged in a staggered manner in the front, rear, left and right are formed, and a plurality of wheels 15 are arranged in a staggered manner in the front, rear, left and right in the gap of the table portion 11a. . By arranging the wheels 15 in a staggered manner in this manner, as shown in FIG. 2, the wheels 15 are provided without gaps when viewed from the seat width direction.
As will be described later, the positions of the plurality of wheels 15 are set such that the delivery position L0, which is the height of the upper edge thereof, is above the upper surface of the table portion 11a in the lowering state S2 described later.
The wheel 15 is intermittently driven by a driving device (not shown) in conjunction with the main drive system of the box making machine.
The wheel 15 constitutes the delivery member of the present invention, and the plurality of wheels 15 and the driving device constitute the delivery mechanism of the present invention.

As described above, the table unit 11a is driven up and down by the driving device 16 at the first driving position P1 and the second driving position P2, respectively. That is, the table portion 11a is driven up and down in synchronization with the operation of the wheel 15 at each of the first drive position P1 and the second drive position P2.
The table unit 11a is individually driven up and down at the first drive position P1 and the second drive position P2, and the height of the table unit 11a at the first drive position P1 and the second drive position P2 is appropriately changed to thereby change the table. The part 11a can be selectively set to three states, that is, an upward state S1, a downward state S2, and a forward inclined state S3. The ascending state S1, the descending state S2, and the forward inclined state S3 will be described later.

As shown in FIG. 2, the driving device 16 that drives the grate 11 including the table portion 11a up and down is provided for each of the leg portions 11b and 11c.
Each driving device 16 includes a substantially oval swing link 17, a rotating shaft 17b extending in the sheet width direction, and a servo motor 19 connected to the rotating shaft 17b.
In the swing link 17, a pin 110 fixed to the lower end portion of the leg portion 11b and the leg portion 11c is loosely fitted in an elongated hole 17a formed on the rear end side, and the front end side is fixed to the rotating shaft 17b. .
The rotating shaft 17b is rotatably supported by an apparatus frame (not shown) and is driven to rotate in the forward direction or the reverse direction by the servo motor 19. By rotating the rotating shaft 17b in the forward or reverse direction, the rear end side with the elongated hole 17a of the oscillating link 17 whose front end is fixed to the rotating shaft 17b oscillates, and is loosely fitted in the elongated hole 17a. The leg 11b or the leg 11c is driven up or down through the pin 110.
The pin 110, the swing link 17, and the rotating shaft 17b constitute the power transmission mechanism of the present invention.

  The control device 100 controls the operation of the drive device 16 as described above, and specifically controls the rotation phase of the servo motor 19 to swing the swing link 17 via the rotation phase of the rotating shaft 17b. Control the angle.

[1-2-2. Operation of paper feeder]
In the sheet feeding device 1M, the table portion 11a is driven up in order from the driving position through which the rear end of the lowermost sheet 10a-1 has passed, that is, in the order of the first driving position P1 and the second driving position P2.
A specific operation of the sheet feeding device 1M will be described with reference to FIG.
3A to 3D are schematic side views of the main part for explaining the operation of the sheet feeding device 1M according to the first embodiment of the present invention.
For convenience, the servo motor 19 is omitted in FIGS.

  The state shown in FIG. 3A is a raised state S1 in which the table portion 11a is raised in the horizontal posture and both in the first drive position P1 and the second drive position P2. In this raised state S1, the entire upper surface of the table portion 11a is higher than the delivery position L0, so that all the wheels 15 are immersed in the table portion 11a and placed on the upper surface of the table portion 11a. No contact with 10a-1. Accordingly, the corrugated cardboard sheet 10 a is in a standby state supported by the table portion 11 a without being sent out by the wheel 15.

  From this state, as shown in FIG. 3 (b), the table portion 11a is brought into a lowered state S2 in which the table 11a is in a horizontal posture and is lowered at both the first drive position P1 and the second drive position P2. In this lowered state S2, the entire upper surface of the table portion 11a is lower than the delivery position L0, so that all the wheels 15 protrude above the table portion 11a and come into contact with the lowermost corrugated cardboard sheet 10a-1. Thus, the lowermost corrugated cardboard sheet 10a-1 can be effectively fed out.

  When feeding of the lowermost corrugated cardboard sheet 10a-1 proceeds, as shown in FIG. 3C, the second corrugated cardboard sheet 10a-2 from the bottom and the wheel 15 are located behind the corrugated cardboard sheet 10a-1. A gap S corresponding to the thickness of the corrugated cardboard sheet 10a-1 is generated between them. When this gap S spreads forward as the corrugated cardboard sheet 10a-1 is sent out, the remaining sheet group 10A cannot be supported by its own rigidity and hangs down, and the bottom surface of the second corrugated cardboard sheet 10a-2 from the bottom. May come into contact with the wheel 15.

Therefore, as shown in FIG. 3D, at the timing when the rear end of the corrugated cardboard sheet 10a-1 passes through the first drive position P1 and further passes through the second drive position P2 to some extent, the first drive position P1 is set. The table portion 11a is set to the forward tilt state S3 by driving up to a position higher than the delivery position L0.
The first drive position P1 is not driven immediately after the rear end of the corrugated cardboard sheet 10a-1 passes the first drive position P1, but after the second drive position P2. This is to prevent the corrugated cardboard sheet 10a-1 from being sandwiched between the table portion 11a and the remaining sheet group 10A between P1 and the second drive position P2.

In the forward tilted state S3, the table portion 11a is substantially lower than the delivery position L0 in front of the second drive position P2, whereas it is lower than the delivery position L0 in the rear of the second drive position P2. It becomes a forward leaning posture.
As a result, in front of the second drive position P2, the wheel 15 can contact the lowermost cardboard sheet 10a-1 to feed out the cardboard sheet 10a, and in the rear of the second drive position P2, the table portion 11a can support the cardboard sheet 10a-2 which is the second from the bottom, and the cardboard sheet 10a-2 can be prevented from coming into contact with the wheel 15.
Note that the posture and position of the swing link 17 with respect to the leg portions 11b and 11c change relatively between when the table portion 11a is tilted forward and when it is in a horizontal posture. Since the pin 110 is loosely fitted in the elongated hole 17a of the swing link 17, such a change in posture and position is allowed.

  When the rear end of the corrugated cardboard sheet 10a passes through the foremost wheel 15 and the feeding out of the corrugated cardboard sheet 10a is completed, the table portion 11a is also made higher than the sending position L0 at the second drive position P2, as shown in FIG. Return to the rising state S1 shown in a). Thereafter, by repeating such a process, the cardboard sheets 10a are sent out in order from the bottom.

  In the case where the size of the corrugated cardboard sheet 10a in the sheet feeding direction A, that is, the sheet length is relatively short and the second corrugated cardboard sheet 10b from the bottom does not hang down and come into contact with the wheel 15, it is shown in FIG. The forward tilt state S3 may be omitted. That is, as shown in FIG. 3C, the table portion 11a is moved from the raised state S1 shown in FIG. 3A to the lowered state S2 shown in FIG. After the delivery of the sheet 10a is completed, the table portion 11a may be returned to the raised state S1 shown in FIG. 3A, and thereafter such a process may be repeated. In this case, the control device 100 controls the operation of the drive device 16 as described above, and specifically controls the rotation phase of the servo motor 19 so that the swing angles of the swing links 17 are matched. Therefore, the raising / lowering timing of the leg part 11b and the leg part 11c agree | coincide, and the raising state S1 and the falling state S2 can be repeated, without the table part 11a becoming a forward inclination state.

Moreover, you may change the timing which makes the table part 11a a forward tilt state, a raise state, and a fall state based on the weight of the cardboard sheet | seat 10a.
For example, the control device 100 controls the operation of the drive device 16 as described above based on the weight of the corrugated cardboard sheet 10a, and specifically controls the rotational phase of the servo motor 19 to change the timing. That is, as the weight of the corrugated cardboard sheet 10a is larger, the feeding force by the wheel 15 is required. Therefore, for example, when the weight of the corrugated cardboard sheet 10a exceeds the reference range, the control device 100 has a longer period during which it is in the lowered state S2. The operation of the driving device 16 is controlled so that the time during which the wheel 15 is in contact with the lowermost corrugated cardboard sheet 10a-1 is lengthened. Thereby, even after the lowermost corrugated cardboard sheet 10a-1 reaches the feed roll 14, the wheel 15 can assist the feeding of the corrugated cardboard sheet 10a-1.
Conversely, when the weight of the corrugated cardboard sheet 10a falls below the reference range, for example, the control device 100 controls the operation of the driving device 16 as described above, so that the lowermost corrugated cardboard sheet 10a-1 is fed to the feed roll 14. Immediately after reaching, the table portion 11a is set to the forward tilted state S3 or the raised state S1. In this case, since the period during which the circumferential surface of the wheel 15 is in contact with the corrugated cardboard sheet 10a is reduced, wear of the circumferential surface of the wheel 15 can be suppressed.

  It should be noted that the period in which the lowering state S2 is set, the forward tilting state, and the timing for the rising state are experimentally determined in advance, and the optimal period and timing for each corrugated cardboard sheet are stored in the control device 100, and the operator changes the order. It may be selected appropriately according to the specifications of the cardboard sheet for each, or may be automatically selected according to the weight of the cardboard sheet 10a input to the control device 100 by an input device (not shown). Alternatively, the operator may manually adjust the period and timing each time the cardboard sheet specifications change.

  For example, when the corrugated cardboard sheet 10a is long in the sheet supply direction A, so-called skip feed may be performed. In this case, the control device 100 controls the operation of the driving device 16 as described above so that paper is fed only once for a plurality of rotations of the printing cylinder of the printing unit 2. Also in this case, the cardboard sheet 10a input to the control device 100 by the input device may be automatically selected according to the dimension in the sheet supply direction A, or manually by the operator whenever the cardboard sheet specifications change. The timing may be adjusted.

[1-3. Action / Effect]
According to the present embodiment, the table portion 11a is driven up by the driving device 16 in the order in which the rear end of the lowermost corrugated cardboard sheet 10a-1 passes, that is, in the order of the drive positions P1 and P2, so the corrugated cardboard sheet 10a. In the gap S behind the corrugated cardboard sheet 10a-1, the lower surface of the second corrugated cardboard sheet 10a-2 is supported by the rear part of the raised table part 11a.
Therefore, the bottom surface of the corrugated cardboard sheet 10a-2 can be prevented from coming into contact with the wheel 15 and being damaged.

  Moreover, since the table portion 11a extends in the sheet supply direction A and is integrally formed, no gap is formed in the sheet supply direction A in the table portion 11a, and the rigidity of the table portion 11a is as much as there is no gap. In addition, the load on the corrugated cardboard sheet 10a in a stacked state can be received over a wide area, and the durability performance of the table portion 11a can be improved as compared with the conventional case.

  Further, no end surface is formed on the table portion 11a in the sheet supply direction due to the gap. The cardboard sheet 10a is conveyed by a wheel 15 whose upper edge protrudes from the table portion 11a by a predetermined height. The predetermined height is slight, and the surface of the cardboard sheet 10a has minute irregularities. The portion that is not supported by is bent slightly downward due to gravity. For this reason, the lower surface of the cardboard sheet 10a may come into light contact with the upper surface of the table portion 11a. When the end surface is formed, the cardboard sheet 10a may hit the corner of the end surface and be damaged. However, since the end face is not formed in the first place, it is possible to prevent the corrugated cardboard sheet 10a being conveyed from being damaged.

Further, if a ruled line is provided on the cardboard sheet 10a along the sheet width direction, the wheel 15 easily slips along the ruled line, and the conveyance of the cardboard sheet 10a becomes unstable.
In the present embodiment, by arranging the wheels 15 in a staggered manner, the wheels 15 are provided without gaps when viewed from the seat width direction. That is, the wheel 15 is continuously provided in the sheet supply direction A. Therefore, even if some of the wheels 15 slip on the ruled line, the ratio of the wheels 15 that come into contact with the cardboard sheet 10a at a position deviated from the ruled line can be relatively increased, and the cardboard sheet 10a is stably conveyed. be able to.

  In addition, since the plurality of driving devices 16 that move up and down the first driving position P1 and the second driving position P2 of the table portion 11a each include the servo motor 19, each of the first driving position P1 and the second driving position P2 is provided. The lifting / lowering timing can be adjusted individually, there are less restrictions on adjusting the lifting / lowering timing, and the adjustment range can be widened.

[2. Second Embodiment]
[2-1. Configuration of paper feeder]
A sheet feeding device 1Q as a sheet feeding device according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 4 is a schematic side view of a main part of a sheet feeding device 1Q according to the second embodiment of the present invention.
In addition, the same code | symbol is attached | subjected about the component same as 1st Embodiment, and the description is abbreviate | omitted.
The sheet feeding device 1Q includes a great 11B, a front guide 12, a backstop 13, feed rolls 14 and 14, a sheet feeding conveyor 15A, a plurality of driving devices 16C and 16D that drive the great 11B up and down, and a driving device. And a control device 100 that controls the operation of 16C and 16D.

The sheet feeding conveyor 15A constitutes a feeding mechanism of the present invention, and a pair of rolls 151 arranged at intervals in the sheet feeding direction A, an endless belt 152 wound around these rolls 151, and a roll 151 A driving device (not shown) connected to at least one of the driving devices. By actuating the driving device, the endless belt 152 is driven and circulated through the roll 151, and the cardboard sheet 10 a is sent out in the sheet supply direction A by the upper surface of the endless belt 152. Therefore, in the present embodiment, the height of the upper edge of the endless belt 152 is the delivery position L0.
Note that a plurality of sheet feeding conveyors 15A are provided at intervals in the sheet width direction.

The great 11B is provided between the sheet feeding conveyors 15A arranged in the sheet width direction and on both outer sides of the sheet feeding conveyor 15A at both ends.
Each great 11B is integrally provided with a table portion 11Ba on which the corrugated cardboard sheet 10a is placed and leg portions 11Bb and 11Bc projecting downward from the table portion 11Ba. The table portion 11Ba is formed of a single plate material that extends along the sheet supply direction A.

The leg portion 11Bb is attached to the table portion 11Ba at the rear first driving position P1. The leg portion 11Bc is attached to the table portion 11Ba at the second drive position P2, and is set to be about half the length of the leg portion 11Bb. A driving device 16C is attached to the leg portion 11Bb, and a driving device 16D is attached to the leg portion 11Bc. With the driving devices 16C and 16D, the table portion 11Ba passes through the leg portions 11Bb and 11Bc. It is individually driven up and down at P1 and the second drive position P2.
Two leg portions 11Bb and 11Bc are provided on the left and right sides, respectively.

The driving device 16C includes a swing link 17A, a rotating shaft 17b, and a servo motor 19 connected to the rotating shaft 17b. In the swing link 17A, a pin 116 fixed to the lower end portion of the leg portion 11Bb is inserted into a circular hole 17c formed on the rear end side, and the front end side is fixed to the rotating shaft 17b.
The driving device 16D includes a swing link 17B, a rotating shaft 17b, a servo motor 19 connected to the rotating shaft 17b, and a link member 18. In the swing link 17B, a pin 117 fixed to the lower end portion of the link member 18 is rotatably inserted into a circular hole 17c formed on the rear end side, and the front end side is fixed to the rotary shaft 17b. A pin 118 is fixed to the upper end portion of the link member 18, and this pin 118 is rotatably inserted into a circular hole 119 formed in the leg portion 11Bc.
The pin 116, the swing link 17A, and the rotating shaft 17b constitute the power transmission mechanism of the present invention. The pin 118, the link member 18, the pin 117, the swing link 17B, and the rotating shaft 17b constitute the power transmission mechanism of the present invention.

  With such a configuration, the control unit 100 individually controls the rotation phase of each servo motor 19 so that the legs 11Bb and 11Bc can be individually driven up and down. Similar to the table portion 11a, the ascending state S1 as shown in FIG. 3A, the descending state S2 as shown in FIGS. 3B and 3C, and the forward inclined state S3 as shown in FIG. 3D. It can be.

  Note that the posture and position of the swing link 17B with respect to the leg portion 11Bc change relatively between when the table portion 11Ba is tilted forward and when it is in a horizontal posture. However, the link member 18 that connects the leg portion 11Bc and the swing link 17B is rotatably connected to the leg portion 11Bc and the swing link 17B by the pins 118 and 117. A change in posture and position is absorbed by the rotation of the link member 18 and allowed.

[2-2. Action / Effect]
According to the second embodiment of the present invention, the table portion 11Ba can be sequentially shifted to the rising state S1, the falling state S2, and the forward tilting state S3 in the same manner as the table portion 11a of the first embodiment. The portion 11Ba is a single piece extending along the sheet feeding direction A, like the table portion 11a of the first embodiment.
Therefore, similarly to the first embodiment, the corrugated cardboard sheet 10a being conveyed can be prevented from being damaged, and the durability performance of the table portion 11Ba that supports the corrugated cardboard sheet 10a can be improved.

  Further, since the endless belt 152 that contacts the cardboard sheet 10a and directly sends out the cardboard sheet 10a is provided without a gap when viewed from the sheet width direction, the cardboard sheet as in the first embodiment. Even when a ruled line is provided on 10a, the cardboard sheet 10a can be stably conveyed.

[3. Third Embodiment]
[3-1. Configuration of paper feeder]
A sheet feeding device 1N as a sheet feeding device according to a third embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a schematic side view of a main part of a sheet feeding device 1N according to the third embodiment of the present invention.
In addition, the same code | symbol is attached | subjected about the component same as the said embodiment, and the description is abbreviate | omitted.

  The sheet feeding device 1N includes a great 11A, a front guide 12, a backstop 13, feed rolls 14 and 14, a sheet feeding conveyor 15A, a plurality of driving devices 16A for driving the great 11A up and down, and a driving device 16A. And a control device 100 for controlling the operation.

The great 11A is provided between the sheet feeding conveyors 15A arranged in the sheet width direction and on both outer sides of the sheet feeding conveyor 15A at both ends.
Each great 11A includes a table portion 11Aa on which the corrugated cardboard sheet 10a is placed, and leg portions 11Ab and 11Ac attached downward to the side surface of the table portion 11Aa. The table portion 11Aa is formed by a single plate material extending along the sheet supply direction A.

In the table portion 11Aa, long holes 111 that are long in the sheet supply direction A are provided in the first driving position P1 and the second driving position P2, respectively. Further, a pin 112 protrudes from the upper end portion of the leg portions 11Ab and 11Ac toward the table portion 11Aa, and the pin 112 is loosely fitted in the elongated hole 111, whereby the leg portions 11Ab and 11Ac are fitted to the table portion 11Aa. Are connected to each other.
The leg portions 11Ab and 11Ac are respectively provided with the driving devices 16A that drive the grate 11A up and down.

The drive device 16 </ b> A includes a leg portion 11 </ b> Ab, a lifting cam 160 disposed to face the lower end of the leg portion 11 </ b> Ac, and a servo motor 19. The lift cam 160 is controlled in rotation phase by the servo motor 19.
The elevating cam 160 is formed with a cam crest 161 projecting on a cam surface that can come into contact with the lower ends of the legs 11Ab and 11Ac. The table portion 11Aa can be raised at the first drive position P1 or the second drive position P2, and the table portion 11Aa can be moved to the first drive position P1 or the second drive position P2 in a rotational phase where the portions other than the cam peak portion 161 abut against the leg portions 11Ab, 11Ac. Can be lowered.

A pair of leg portions 11Ab and 11Ac is sandwiched from the front and rear so that the leg portions 11Ab and 11Ac are raised and lowered along the vertical direction when the leg portions 11Ab and 11Ac are driven up and down. The following driven rollers 113 are provided. Each of the rollers 113 is rotatably supported by a device frame (not shown).
The lifting cam 160 constitutes a power transmission mechanism of the present invention.

  With this configuration, the control device 100 individually controls the rotation phase of each servo motor 19 so that the leg portions 11Ab and 11Ac can be individually driven up and down. Similar to the table portion 11a of the embodiment, the ascending state S1 as shown in FIG. 3A, the descending state S2 as shown in FIGS. 3B and 3C, and the front as shown in FIG. 3D. It can be in the tilted state S3.

Note that the position and posture of the table portion 11Aa with respect to the leg portions 11Ab and 11Ac change depending on whether the table portion 11Aa is tilted forward or horizontal, but the pins 112 of the leg portions 11Ab and 11Ac are changed. Since it is loosely fitted in the long hole 111 of the table portion 11Aa, such a change in position and posture is allowed.
Since other points are the same as those of the first embodiment, description thereof is omitted.

[3-2. Action / Effect]
According to 3rd Embodiment of this invention, since it is comprised as mentioned above, the effect similar to 2nd Embodiment is acquired.

[4. Fourth Embodiment]
[4-1. Configuration of paper feeder]
A sheet feeding device 1P as a sheet feeding device according to a fourth embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a schematic side view of a main part of a sheet feeding device 1P according to the fourth embodiment of the present invention.
In addition, the same code | symbol is attached | subjected about the component same as the said embodiment, and the description is abbreviate | omitted.

  The sheet feeding device 1P includes a great 11A, a front guide 12, a backstop 13, feed rolls 14 and 14, a sheet feeding conveyor 15A, a plurality of driving devices 16B that drive the great 11A up and down, and a driving device 16B. And a control device 100 for controlling the operation.

The driving device 16B is individually provided on the leg portions 11Ab and 11Ac.
Each drive device 16B includes a rack gear 162 fixed to the rear surface of the leg portion 11Ab or the leg portion 11Ac, a pinion gear 163 that meshes with the rack gear 162, and a servo motor 19. The pinion gear 163 is rotatably supported by a device frame (not shown), and the rotation transfer is controlled by the servo motor 19.

In addition, a pair of sliders 115 are fixed to the front surfaces of the leg portions 11Ab and 11Ac on the lower side with a space in the vertical direction. The pair of upper and lower sliders 115 are slidably attached to rails 114 extending in the vertical direction and arranged in front of the leg portions 11Ab and 11Ac.
With such a configuration, when the leg portions 11Ab and 11Ac are driven up and down, the leg portions 11Ab and 11Ac are guided by the rail 114 via the slider 115 and moved up and down along the vertical direction.
The rail 114 is supported and fixed to an apparatus frame (not shown).

The leg portions 11Ab and 11Ac can be individually moved up and down integrally with the rack gear 162 by individually rotating the pinion gear 163 in the forward direction or the reverse direction by the servo motors 19. Therefore, since the control device 100 individually controls the operation of each servo motor 19 so that the legs 11Ab and 11Ac can be raised and lowered individually, the table portion 11Aa is shown in FIG. 3A as in the first embodiment. Such an upward state S1, a downward state S2 as shown in FIGS. 3B and 3C, and a forward tilt state S3 as shown in FIG.
The rack gear 162 and the pinion gear 163 constitute the power transmission mechanism of the present invention.
Since other points are the same as those of the third embodiment, description thereof is omitted.

[4-2. Action / Effect]
According to 4th Embodiment of this invention, since it is comprised as mentioned above, the effect similar to 2nd Embodiment and 3rd Embodiment is acquired.

[5. Others]
(1) In each of the above embodiments, when a signal indicating that the cardboard sheets 10a are to be stacked on the table portions 11a and 11Aa is input to the control device 100, the table portions 11a and 11Aa are set to the raised state S1. You may do it. Such a signal can be input to the control device 100 by an operator pressing a switch, for example.
Since the table portions 11a and 11Aa can be brought into the horizontal state by setting the table portions 11a and 11Aa to the raised state S1, the cardboard sheets 10a can be stably stacked on the table portions 11a and 11Aa in the horizontal state, It can suppress that the corrugated-cardboard sheet | seat 10a is shifted | deviated and stacked | stacked back and forth and right and left.

(2) In each of the above embodiments, when a signal indicating that the loading of the cardboard sheets 10a onto the table portions 11a and 11Aa is completed, the table portions 11a and 11Aa are moved by the driving devices 16, 16A and 16B. You may make it incline once forward. Such a signal can be input to the control device 100 by an operator pressing a switch, for example. Further, the table portions 11a and 11Aa may be tilted forward by setting the forward tilt state S3, or may be tilted forward by an angle downward or upward from the forward tilt angle of the forward tilt state S3. Also good.
By tilting the table portions 11a and 11Aa forward, the stacked cardboard sheets 10a slide on the table portions 11a and 11Aa at the same time and come into contact with the front guide 12, whereby the position of the front end of the cardboard sheet 10a is reached. And the occurrence of defective products due to the displacement of the cardboard sheet 10a in the box making machine can be suppressed.
After the table portions 11a and 11Aa are once inclined forward, the table portions 11a and 11Aa are brought into a horizontal posture by being brought up. A series of operations in which the table portions 11a and 11Aa are set in a horizontal posture after being inclined forward may be repeated a plurality of times.

  When the table portions 11a and 11Aa are inclined forward, the lowermost corrugated cardboard sheet 10a-1 is pressed against the table portions 11a and 11Aa by the weight of the remaining sheet group 10A. There is no way out of the lower edge.

(3) In each of the above embodiments, the table portions 11a and 11Aa are integrally formed with respect to the sheet supply direction A, but may be divided with respect to the sheet supply direction A.
For example, the table portions 11a, 11Aa, and 11Ba may be divided into two with respect to the sheet feeding direction A by a partition line 11d indicated by a broken line in FIGS. When the partition line 11d is formed in the configuration of FIG. 2, the divided bodies separated by the partition line 11d are individually driven up and down by the drive device 16A, and the rear end of the corrugated cardboard sheet 10a-1 is rearward. After passing through the divided body, the rear divided body is driven up and down to a position higher than the delivery position L0, and after the rear end of the cardboard sheet 10a-1 passes through the front divided body, the front divided body is driven up and down. Thus, the position is higher than the delivery position L0. In this configuration, each divided body is moved up and down while maintaining a horizontal posture. That is, the respective divided bodies and the respective leg portions 11Aa and 11Ab are fixed so as not to swing.

  When the partition line 11d is formed in the configuration of FIG. 4, the leg portion 11Bb side is configured in the same manner as the leg portion 11Bc side. That is, the leg portion 11Bb is replaced with a series of configurations including the leg portion 11Bc, the circular hole 119, the pin 118, and the link member 18, and is connected to the swing link 17A. 5 and FIG. 6, when the partition line 11d is formed, the long hole 111 and the pin 112 are omitted, and each divided body and each leg portion 11Aa and 11Ab are the table portion 11a and leg portion 11b in FIG. , 11c.

Even in this case, the entire table portions 11a, 11Aa, and 11Ba extend without gaps in the sheet supply direction A. Therefore, as in the above-described embodiments, when there is a gap, the table portions 11a, 11Aa, and 11Ba move toward the sheet supply direction A. It is possible to reliably prevent the corrugated cardboard sheet 10a-1 from being damaged due to contact with the formed end face.
The division of the table portions 11a, 11Aa, and 11Ba is not limited to two divisions, and the table portions 11a, 11Aa, and 11Ba may be divided into any number.

  (4) In the first embodiment, the feeding mechanism may be configured by the sheet feeding conveyor 15A as in the second to fourth embodiments instead of using the wheel 15. Conversely, in the second to fourth embodiments, the delivery mechanism may be configured using the wheel 15 instead of the paper feed conveyor 15A.

  (5) In the second embodiment to the fourth embodiment, the feeding mechanism may be configured by arranging a plurality of paper feed conveyors shorter than the paper feed conveyor 15A in the sheet supply direction A.

  (6) In each of the above-described embodiments, the example in which the sheet supply device of the present invention is applied to the corrugated sheet feeding device installed in the box making machine has been described. However, the sheet supply device of the present invention is not limited to this. . The sheet supply apparatus of the present invention may be applied to, for example, a paper feeding apparatus for cardboard.

1 Paper Feeding Unit 1M, 1N, 1P, 1Q Paper Feeder (Sheet Feeder)
DESCRIPTION OF SYMBOLS 2 Printing part 2a-2d Printing unit 3 Paper discharge part 4 Die cut part 5 Folding part 6 Counter ejector part 10 Box making sheet material 10a, 10a-1, 10a-2 Corrugated cardboard sheet (sheet)
10A Remaining sheet group 11, 11A, 11B Great 11a, 11Aa, 11Ba Table part 11b, 11c, 11Ab, 11Ac, 11Bb, 11Bc Leg part 12 Front guide 13 Backstop 14 Feed roll 15 Wheel 15A Paper feed conveyor (sending mechanism)
16, 16A, 16B, 16C, 16D Drive unit 17, 17A, 17B Oscillating link 17a Long hole 17b Rotary shaft 17c, 119 Circular hole 19 Servo motor 20 Conveyor 100 Controller 110, 112, 116, 117 Pin 111 Long hole 113 Roller 114 Rail 115 Slider 160 Elevating cam 161 Cam crest 162 Rack gear 163 Pinion gear A Sheet supply direction L0 Feeding position P1 First driving position P2 Second driving position S1 Up state S2 Down state S3 Forward tilt state

Claims (11)

A delivery mechanism comprising a delivery member, and with the delivery member, the lowermost sheet is extracted from the stacked sheets and delivered to the sheet processing unit;
The lowermost sheet is separated from the delivery member at a position higher than the delivery position which is the height of the upper edge of the delivery member, and the lowermost sheet is brought into contact with the delivery member at a position lower than the delivery position. A table part to be
A plurality of driving devices for driving the table portion up and down at different driving positions with respect to the sheet supply direction;
A control device for individually controlling the operation of the plurality of drive devices,
The sheet supply apparatus, wherein the table unit extends in the sheet supply direction. 2. The control device according to claim 1, wherein the control device controls the operation of the plurality of driving devices to drive the table portion up in order from the driving position through which the rear end of the lowermost sheet has passed. Sheet feeding device. The sheet supply device according to claim 1, wherein the control device controls the timing of the elevation drive of the table unit based on the weight of the sheet. The said control apparatus controls the timing of the said raising / lowering drive of the said table part based on the length of the said sheet supply direction of the said sheet | seat, It is characterized by the above-mentioned. Sheet feeding device. The sheet feeding device according to any one of claims 1 to 4, wherein the feeding member is provided without a gap when viewed from a sheet width direction orthogonal to the sheet feeding direction. A leg portion protruding downward from each of the drive positions of the table portion;
Each of the plurality of driving devices includes a servo motor and a power transmission mechanism interposed between the servo motor and the leg portion. The sheet supply apparatus according to 1. As the plurality of drive devices, a first drive device that performs the lift drive at a first drive position and a second drive device that performs the lift drive at a second drive position in front of the first drive position are provided. ,
The sheet feeding apparatus according to claim 1, wherein the table unit is integrally formed with respect to the sheet feeding direction and is configured to be able to tilt forward. The control device individually controls the operation of the first drive device and the second drive device,
Before starting sending out the lowermost sheet, the table portion is made higher than the sending position at both the first drive position and the second drive position, and the lowermost sheet is moved to the Set it in a raised state that does not come into contact with the delivery mechanism,
When starting the feeding of the lowermost sheet, the table portion is lower than the feeding position at both the first driving position and the second driving position, and the lowermost sheet is moved to the lowermost sheet. The lowering state is brought into contact with the delivery mechanism,
After the rear end of the lowermost sheet has passed through the first drive position, the table portion is made higher than the delivery position at the first drive position, and a remaining sheet group that is a remaining sheet. The sheet feeding apparatus according to claim 7, wherein the sheet feeding device is in a forward tilt state in which the table is supported by the table unit. 9. The sheet feeding apparatus according to claim 8, wherein the control unit sets the table unit to the raised state when receiving a signal indicating that the sheets are stacked on the table unit. 9. The control device according to claim 7, wherein when the control device receives a signal indicating that the stacking of the sheets on the table unit is completed, the control unit tilts the table unit once. 10. The sheet supply apparatus according to item. A box making machine comprising the sheet feeding device according to any one of claims 1 to 10.

Images