JP2003267566A - Paper feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper feeding device capable of automatically and continuously feeding a batch of sheets onto a paper feeding conveyor. <P>SOLUTION: A lower edge is supported with sheets S<SB>1</SB>leaned so as to be mutually layered, a carriage 11 is provided on the upstream side of the paper feeding conveyor C<SB>0</SB>for conveying the sheets toward a discharge end with upper edges of the respective sheets S<SB>1</SB>tilted forward, and an L-shaped paper feeding deck 20 is supported by the carriage 11 so as to be oscillated freely in such a direction that the top end of a sheet supporting plate 20a moves vertically. The batch sheets S<SB>2</SB>are fed onto the paper feeding deck 20 which is oscillated upward at a reversing stop position of the carriage 11, the batch sheets S<SB>2</SB>are supported by the paper feeding deck 20, and the carriage 11 is advanced toward the paper feeding conveyor C<SB>0</SB>. When a first sheet detection sensor which moves with the carriage 11 detects a sheet group S<SB>0</SB>on the paper feeding conveyor C<SB>0</SB>, the carriage 11 is stopped. After the stop, the carriage 20 is oscillated downward to feed the batch sheets S<SB>2</SB>onto the paper feeding conveyor C<SB>0</SB>. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device for continuously feeding a sheet such as a packaging sheet for packaging cans, bottles and the like in small amounts to a sheet feeding section of a machine.

[0002]

2. Description of the Related Art Beer cans are continuously conveyed in one direction in two rows by a conveyor, and packaging sheets are continuously supplied onto the two rows of beer cans, while the packaging sheets are being transferred. 2. Description of the Related Art A multi-pack packaging device in which a plurality of beer cans are wrapped by folding a packaging sheet has been conventionally known.

In the above multi-pack packaging apparatus, since it is necessary to continuously feed the packaging sheet without forming a gap between the packaging sheet and the preceding packaging sheet, the reciprocating kicker advances. It is not possible to adopt a paper feeding method in which the stacked packaging sheets are sometimes sent out one by one from the bottom.

Further, in the multi-pack packaging device,
Since it has a production capacity of forming about 400 cases of packaged products per minute, it is necessary to accumulate a large number of packaging sheets in the paper feeding section.

Therefore, in the conventional multi-pack packaging device, a paper feeding method using a paper feeding conveyor is adopted. That is, one side of the outer periphery of the packaging sheet is supported by the sheet feeding conveyor, and a large number of packaging sheets are accumulated in a state of being stacked on top of each other with the upper edge slightly inclined forward, and the group of sheet packaging is accumulated by the sheet feeding conveyor. The leading packaging sheet is moved toward the discharge end and stopped at the top and bottom stoppers.

[0006] Then, the top packaging sheet is laid down forward around the lower stopper, and the packaging sheet group is sequentially conveyed one by one from the leading packaging sheet onto the beer conveyed in two rows. When the remaining amount of the packaging sheet group on the sheet feeding conveyor becomes low, a sheet (hereinafter referred to as a batch sheet) of a plurality of sheets is fed to the sheet feeding conveyor to supply a large number of packaging sheets. I am trying to make an accumulation rate.

[0007]

By the way, when a batch sheet is fed onto the sheet feeding conveyor, the packaging sheet group accumulated on the sheet feeding conveyor is always conveyed forward so that the position of the last packaging sheet is always constant. Due to variations, it is extremely difficult to automatically feed batch sheets so that the last sheet overlaps the batch sheet.

For this reason, conventionally, batch sheets are manually fed onto the sheet feeding conveyor, which is inefficient and requires heavy labor. Further, the paper feed conveyor is always in a moving state, which is extremely dangerous.

An object of the present invention is to provide a sheet feeding device capable of continuously and efficiently feeding a batch sheet in which a large number of sheets are superposed on a sheet feeding conveyor.

[0010]

In order to solve the above-mentioned problems, in the present invention, a large number of leaning sheets that overlap each other are supported, and the upper edge of each sheet is forwardly tilted to the discharge end. A sheet feeding conveyor that conveys the sheet toward the sheet feeding table, a carriage that is supported on the sheet feeding conveyor so as to reciprocate, a reciprocating device that reciprocates the carriage, and a bottom of each batch sheet in which many sheets overlap. The seat support plate supporting the edge is formed, and the seat support plate and the back support plate provided at the rear end of the seat support plate form an L shape, and the tip of the seat support plate moves up and down by the carriage. A paper feed table which is swingably supported; a rocking device for rocking the paper feed table downward at a forward stop position of the carriage and upward at a backward stop position of the carriage; Move with the table and Than is carriage when detecting a group of sheets is adopted a structure comprising a sheet detecting sensor for reciprocating device stops controlling to stop on Beya.

In the sheet feeding device having the above-described structure, the sheet feeding table is held in a state where the sheet support plate is inclined with an upward slope toward the leading end at the backward stop position of the carriage. When the batch sheet is fed onto the sheet feeding table so that the lower edge of the batch sheet is supported by the sheet supporting plate, the reciprocating device operates to convey the sheet feeding table forward. When the sheet detection sensor that moves together with the sheet feed table detects a sheet group accumulated on the sheet feed conveyor, the reciprocating device stops. After the stop, the rocking device is operated to rock the paper feed tray downward, and the rocking feeds the batch sheets on the paper feed tray onto the paper feed conveyor.

After the batch sheets are supplied, the reciprocating device is operated to retract the supply table, and at the retracted stop position, the swinging device is operated to swing the sheet feeding table upward. After the rocking is stopped, the next batch sheet is fed onto the paper feed table, and the above operation is repeated thereafter. Therefore, batch sheets can be automatically and continuously supplied onto the paper feed conveyor efficiently and safely.

In addition, a pusher device for pressing the batch sheet to a position overlapping the back surface of the sheet group on the sheet feeding conveyor is provided in the conveyance path of the batch sheet fed from the sheet feeding table onto the sheet feeding conveyor. The batch sheet fed on the paper feed conveyor can be pressed so that it overlaps with the last sheet of the accumulated sheet group, so that the batch sheet has the same inclination angle as the accumulated sheet group. The sheet can be held, the sheet can be reliably stopped at the discharge end of the sheet feeding conveyor, and it is possible to reliably prevent a sheet feeding error.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 5, the sheet feeding conveyor C ₀ feeds the sheet S ₁ from the first conveyor C ₁ that conveys the sheet S ₁ substantially horizontally while supporting one side of the outer periphery thereof, and from the first conveyor C _1. The second conveyor C ₂ conveys the incoming sheet S ₁ with a downward slope toward the discharge end.

The first conveyor C ₁ is a head sprocket 1
It consists of a double-row chain conveyor in which a chain 3 is spanned between the tail sprocket 2 and the tail sprocket 2. This first conveyor C ₁
Is driven by a motor M ₁ connected to the sprocket shaft 4 of the head sprocket 1.

On the other hand, the second conveyor C ₂ comprises a double row chain conveyor in which a chain 7 is spanned between a head sprocket 5 and a tail sprocket 6, and the tail sprocket 6 is attached to the sprocket shaft 4 of the first conveyor C _1. It is rotatably supported. The second conveyor C ₂ is driven by a motor M ₂ connected to the sprocket shaft 8 of the head sprocket 5.

The paper feed conveyor C ₀ supports a large number of leaning sheets S ₁ that are superposed on each other, and conveys the sheets S ₁ toward the discharge end in an inclined state in which the upper edge of the sheets S ₁ is tilted forward. A pair of stoppers 9 and 10 for stopping the leading sheet S ₁ of the large number of sheets (sheet group) S ₀ conveyed by the paper feed conveyor C ₀ are provided at the discharge end thereof.

Leading end that stops by contacting stoppers 9 and 10
Sheet S₁Is the lower stack by a paper ejection device (not shown).
With the paper 10 as the center, the paper feeding container
Ya C ₀By being discharged from above, the paper feeding conveyor C
₀Upper sheet group S₀Is the first sheet S₁Consecutively from
Is discharged.

A carriage 11 is provided upstream of the paper feed conveyor C _0.
Is provided. As shown in FIGS. 1 and 3, the carriage 11 has a pair of side frames 11a on the left and right, and each side frame 11a
Are supported so as to be reciprocally movable along a linear guide 13 provided on the outer surface of the conveyor frame 12 of the paper feed conveyor C ₀ .

The carriage 11 is reciprocated by the reciprocating device 14 toward the feeding end of the paper feed conveyor C ₀ . The reciprocating device 14 fixes a toothed pulley 16 to each of both ends of a drive shaft 15 rotatably supported by an upstream end of the conveyor frame 12, and the toothed pulley 1
6 and the timing belt 18 between the rotatable toothed pulley 17 supported on the downstream end of the conveyor frame 12, and a part of each timing belt 18 is reciprocated.
Fixed to each side frame 11a of the carriage 1 and the drive shaft 15 is rotated in the forward or reverse direction by a motor M ₃ connected to the end of the carriage 1
1 is configured to reciprocate.

As shown in FIGS. 1 and 4, the carriage 11
A support shaft 19 is provided between the pair of side frames 11a.
Both ends of the support shaft 19 are rotatably supported by a pair of side frames 11a, and a plurality of paper feed trays 20 are attached to the support shaft 19.

Each paper feed tray 20 is L-shaped with a back support plate 20b provided at the rear end of the sheet support plate 20a. The L-shaped angle formed by the seat support plate 20a and the back support plate 20b may be a right angle as shown in the embodiment, or may be an obtuse angle. A clamp 21 that holds the support shaft 19 is attached to the back surface of the back support plate 20b.
A cylinder 23 for pressing a sheet is supported by a bracket 22 attached above.

The paper feed tray 20 is provided at a position corresponding to the space between the chain conveyors forming the paper feed conveyor C ₀ ,
When carriage 11 is moved toward the on the feed end of the paper feed conveyor C _0, and is so as not to interfere with paper feeding conveyor C _0.

As shown in FIGS. 3 and 4, the paper feed tray 20 is swung in the direction in which the leading end of the sheet support plate 20a is vertically moved by a swing device 24 provided at one end of the support shaft 19. . The rocking device 24 connects the piston rod 26a of the cylinder 26 supported by the side frame 11a of the carriage 11 to the tip of the lever 25 attached to the end of the support shaft 19 to move the piston rod 26a forward and backward. The support shaft 19 is configured to rotate in the forward or reverse direction by retreating.

As shown in FIG. 2, the paper feed tray 20 is held in a state where the sheet support plate 20a inclines with an upward slope toward the leading end at the backward stop position of the carriage 11.
In that state, the batch sheet S ₂ supplied is received. Further, at the forward stop position of the carriage 11, the sheet feeding table 20 is swung in the direction in which the front end of the sheet supporting plate 20a moves downward, and the swinging feeds the batch sheet S ₂ onto the sheet feeding conveyor C _0. It is supposed to do.

When the batch sheet S ₂ is supplied to the paper feed tray 20, here, the batch sheet S ₂ is clamped by the manipulator 27 of the industrial robot, and the manipulator 27 is moved to the top of the paper feed tray 20 to make the batch sheet S _2. S ₂
I try to release the pinching. At this time, in the batch sheet S ₂ , the outer peripheral lower edge of each sheet S ₁ is the sheet support plate 2
0a and the back of the batch sheet S ₂ is the back support plate 2
Supplied to be supported at 0b.

Incidentally, the manipulator 2 for the industrial robot 2
7, a cylinder 29 is attached to one side plate 28a of the U-shaped holding frame 28, and the holding plate 30 which is moved back and forth by the cylinder 29 and the other side plate 28b of the holding frame 28 holds the batch sheet S ₂ from both sides. Then, the holding of the batch sheet S ₂ is released by the backward movement of the holding plate 30.

The batch sheet S for the paper feed tray 20
The supply of ₂ is not limited to this. For example, a sandwiching tool capable of sandwiching and releasing the sandwiching of batch sheets is provided above the aligning table provided on one side of the carriage 11 at the backward stop position and above the paper feed table 20 supported by the carriage 11. A batch sheet placed on the aligning table is movably and vertically movable between the positions, and the batch sheet is clamped by a clamping tool and then lifted. After the lifting is stopped, the batch sheet is moved toward the paper feed table 20. Alternatively, it may be stopped at the position on the paper feed table 20 and then lowered, and the nipping of the nipping tool may be released when the batch sheet is supported by the paper feed table 20.

Alternatively, the batch sheet S ₂ may be manually supplied to the paper feed table 20.

As shown in FIGS. 2 and 4, the carriage 11
A sensor support arm 31 is attached to one side frame 11a, and the first sheet detection sensor PH ₁ and the second sheet detection sensor PH ₂ are attached to the sensor support arm 31 by the carriage 1
1 is supported at intervals in the moving direction.

Provided at the tip of the sensor support arm 31
Second sheet detection sensor PH₂Is the paper feed conveyor C₀Up
Sheets S accumulated on₀Last sea of
To S ₁Is detected, the detection signal is omitted from the figure.
It is designed to output to the control device, and the control device is the second system.
Sensor PH₂Round-trip depending on the signal input from
Motor M of moving device 14₃To decelerate and rotate
There is.

On the other hand, when the first sheet detection sensor PH ₁ provided upstream of the second sheet detection sensor PH ₂ detects the last sheet S ₁ of the sheet group S ₀ on the sheet feeding conveyor C ₀ , The detection signal is output to the control device, and the control device outputs the first sheet detection sensor PH ₁
The motor M ₃ of the reciprocating device 14 is stopped by a detection signal input from the.

As shown in FIGS. 1 and 7, the paper feed table 2 is provided above the first conveyor C ₁ in the paper feed conveyor C ₀ .
A pusher device 32 is provided for pressing the batch sheet S ₂ supplied onto the first conveyor C _{1 from} above _{0 to} the rear end surface of the sheet group S ₀ already accumulated on the sheet feeding conveyor C ₀ .

The pusher device 32, the upstream end of the sheet S ₁ in the conveying direction to a position adjustably movable carriage 33 provided, the rotary shaft 34 extending long in a direction perpendicular to the conveying direction of the sheet S ₁ A plate-shaped pusher 35 for pressing the batch sheet S ₂ is provided at the center of the rotary shaft 34 in the longitudinal direction, a lever 36 is attached to the end of the rotary shaft 34, and the lever 36 is mounted on the moving table 33. The cylinder 37 provided is connected, and the rotary shaft 34 is rotated in the forward and reverse directions by expansion and contraction of the cylinder 37.

The sheet feeding device shown in the embodiment has the above-mentioned structure, and the sheet feeding table 20 supported by the table 11 in the state where the table 11 is stopped at the retracted position is as shown in FIG. The sheet support plate 20a is held in a state of being inclined with an upward slope toward the tip.

Now, the batch sheet S is placed on the paper feed table 20.
_{When 2} is supplied, the reciprocating device 14 operates and the carriage 1
1 is advanced to the downstream side toward the discharge end of the paper feed conveyor C ₀ .

The carriage 11 is moved to the discharge end of the feeding conveyor C _0, the second sheet group S of sheet detecting sensors PH ₂ is already accumulation rate on the paper feed conveyor C _0
When the last seat S ₁ of ₀ is detected, the reciprocating device 14
The motor M _{3 of} is rotated at a reduced speed. Due to the decelerated rotation, the carriage 11 moves forward while decelerating, and as shown in FIG.
When the first sheet detection sensor PH ₁ detects the last sheet S ₁ of the sheet group S ₀ accumulated on the sheet feeding conveyor C ₀ , the motor M ₃ is stopped.

As described above, the second sheet detection sensor PH
_{When 2} detects the sheet group S ₀ accumulated on the sheet feeding conveyor C ₀ , the motor M of the reciprocating device 14 is detected.
_When the first sheet detection sensor PH ₁ detects the sheet group S ₀ , the motor M ₃ is stopped to rotate the carriage ₃ deceleratingly, so that the carriage 11 that supports the paper feed tray 20 is displaced to the stop position by the inertial force. Can be prevented, and the paper feed tray 20 can be accurately stopped at the forward position.

When the carriage 11 stops at the forward position, FIG.
As shown in (II), the oscillating device 24 operates and the paper feed tray 2
0 is swung downward, and the batch sheet S ₂ on the sheet feed table 20 is fed onto the sheet feed conveyor C ₀ by the swing.

At this time, since the sheet group S ₀ accumulated on the sheet feeding conveyor C ₀ is in a state of being ejected in order from the leading sheet S ₁ and moving forward, the sheet group S _{0 at} the frontmost position of the batch sheet S ₂ is moved. The sheet S ₁ may be supplied in a state in which a small gap is formed in the lower portion between the sheet S ₁ and the last sheet S ₁ of the sheet group S ₀ , as shown in FIG. 6 (II). In that case, the batch sheet S ₂ falls forward,
The front upper part is supported by the rear upper part of the sheet group S ₀ .

When the batch sheet S ₂ is fed onto the sheet feeding conveyor C ₀ , as shown in FIG.
When the sheet 3 extends and presses the batch sheet S ₂ , the reciprocating device 14 operates to retreat the carriage 11.

Thus, prior to the retreat of the carriage 11,
Batch sheet S by cylinder 23 ₂To press
From the batch sheet S₂Be sure to prevent the rear fall of
You can

When the carriage 11 is moved to the rear position and stopped as shown by the solid line in FIG. 1, the rocking device 24 is operated to rock the paper feed table 20 upward. When the sheet support plate 20a of the paper feed tray 20 is tilted toward the leading end due to this swing, the next batch sheet S ₂ is fed onto the paper feed tray 20. After that, the above-mentioned operation is repeated, and the batch sheets S ₂ are successively supplied onto the sheet feeding conveyor C ₀ .

Here, as shown in FIG. 6 (II), the batch sheet S ₂ fed onto the sheet feeding conveyor C ₀ has a small gap at the bottom between the batch group S ₀ and the accumulated sheet group S _0. When the batch sheets S ₂ are fed one after another in a state of being formed, the tilt angle of the batch sheet S ₂ becomes gradually larger, and when the batch sheet S ₂ is conveyed to the discharge end of the sheet feeding conveyor C ₀ , the top sheet S ₁ of the batch sheet S ₂ becomes There is a risk that the upper stoppers 9 and 10 will not support the sheet, and there is a risk that the sheet S ₁ cannot be normally fed to the next step, that is, a sheet feeding error may occur.

In order to prevent the occurrence of such inconvenience,
A pusher device 32 is provided on the discharge end of the first conveyor C ₁ in the paper feed conveyor C ₀ . The pusher device 32 extends the cylinder 37 when the batch sheet S ₂ supplied on the paper feed conveyor C ₀ is conveyed to the lower position thereof, and swings the pusher 35 downward by the rotation of the rotary shaft 34. Then, as shown in FIG. 7, the rear end surface of the batch sheet S _{2 in} the conveying direction is pressed, and the pressing moves the batch sheet S ₂ to a position where the gap formed between the batch group S ₂ and the sheet group S ₀ is closed. And the sheet S _{1 of the} batch sheet S _{2 is} moved by the movement.
Is held at the same inclination state and the sheet S ₁ of the sheet group S _0, each sheet S ₁ is in intimate contact. The pusher 35 is swung upward after pressing the batch sheet S ₂ .

[0046] In the embodiment, although the pusher device 32 for pushing moving the batch sheet S ₂ is provided on a first conveyor C _1, it is provided with a pusher device 32 to the first lower conveyor C ₁ Good.

[0047]

As described above, according to the present invention, when a batch sheet is fed onto the paper feed table supported by the carriage at the backward stop position of the carriage, the carriage is moved to the feed conveyor. When the sheet detection sensor for stopping installed on the paper feed tray detects a group of sheets accumulated on the paper feed conveyor, it moves forward toward the discharge end and the carriage stops, and after that, the paper feed is stopped. Since the table swings downward, batch sheets can be automatically and efficiently and safely supplied to the rear of the sheet group accumulated on the sheet feeding conveyor.

Further, since the batch sheet fed onto the sheet feeding conveyor is pressed by the pusher device, each sheet of the batch sheet has the same inclination as each sheet of the sheet group accumulated on the sheet feeding conveyor. It is possible to maintain the state, and it is possible to prevent a paper feed error from occurring when the sheet is discharged from the discharge end of the paper feed conveyor.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a sheet feeding device according to the invention.

FIG. 2 is a front view showing a part of a carriage of the paper feeding device shown in FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a plan view showing a portion of a pusher device of the paper feeding device shown in FIG.

6 (A), (II), and (III) are cross-sectional views showing a stepwise supply state of a batch sheet.

FIG. 7 is a sectional view showing an operating state of the pusher device shown in FIG.

[Explanation of symbols]

C ₀ Paper feed conveyor 11 Reciprocating table 14 Reciprocating device 20 Paper feeding table 20a Sheet support plate 20b Back support plate 24 Swinging device 32 Pusher device PH ₁ First sheet detection sensor PH ₂ Second sheet detection sensor

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3F048 AA00 AB00 BA05 BB02 CC03                       DA06 DB07 DC00 EA02 EB38                 3F343 FA01 FB13 FC18 GA04 GE02                       GE09 GE15 GE17 HE09 HE20                       KB02 KB18 KB20 MA08 MA23                       MA33

Claims (2)

[Claims] 1. A paper feed conveyor that conveys a large number of leaning sheets that overlap each other toward the discharge end in a state where the upper edges of the respective sheets are tilted forward, and is supported so as to be reciprocally movable on the paper feed conveyor. And a reciprocating device that reciprocates the reciprocating table, and a sheet support plate that supports the lower edge of each sheet of a batch sheet in which a large number of sheets overlap each other. And a back support plate provided in the L-shape, and the paper feed table supported by the carriage so as to be swingable in a direction in which the leading end of the sheet support plate moves up and down, and the paper feed table is moved forward by the carriage. An oscillating device that oscillates downward at the stop position and upwards at the retreat stop position of the carriage, and a carriage that moves together with the carriage and stops when the sheet group on the paper feed conveyor is detected. To stop the reciprocating device A sheet feeding device including a sheet detection sensor for stopping. 2. A pusher device for pressing the batch sheet to a position overlapping the back surface of the sheet group on the sheet feeding conveyor is provided in a conveying path of the batch sheet fed from the sheet feeding table onto the sheet feeding conveyor. Item 1. The sheet feeding device according to item 1.