JP2727210B2 - Cardboard sheet feeding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cardboard sheet feeding apparatus for sending out one cardboard sheet in a cardboard case manufacturing process.

[Conventional technology]

Conventionally, as a cardboard sheet supply device, a cardboard sheet is stacked on a table, and the lowermost cardboard sheet is entirely exposed by suction from a plurality of intake holes communicating from the lower surface of the table toward the upper surface. It is widely known that the cardboard sheet is sequentially sent out by a kicker which reciprocates back and forth on the upper surface of the table at the rear of the table while being kept in close contact with the table.

However, when a strong suction force is applied to the cardboard sheet, the load of the kicker projecting from the rear end face of the cardboard sheet increases, which limits the projecting speed of the kicker and damages the end face of the cardboard sheet by the tip of the kicker. The problem arises.

For this reason, as described in Japanese Patent Publication No. 56-20186, the present inventors dispose a number of rotating pulleys in series or in parallel on a part of a table surface, and put a cardboard cardboard on the rotating pulleys. We have developed a cardboard sheet feeder that reduces the load of the cardboard sheet protruding by the kicker despite the strong suction force with the sheet placed.

Further, in this apparatus, the table is divided into a fixed table and a movable table, and there is a space between the opposed end faces of these tables so that horizontal support members supporting a plurality of pulleys can be introduced into each other. By projecting and moving the movable table in the front-rear direction, the suction area can be adjusted according to the size of the cardboard sheet.

[Problems to be solved by the invention]

However, such a corrugated cardboard sheet supply device not only requires a large number of rotating pulleys and complicates the structure, but also moves the movable table in the front-rear direction according to the size of the cardboard sheet. Is retracted to increase the cardboard sheet mounting area, there is a portion where the horizontal support members of the fixed table and the movable table, on which a plurality of pulleys are arranged, do not mesh with each other, and the pulleys on the cardboard sheet mounting surface The arrangement density becomes non-uniform and there are portions where no pulleys are present, which not only makes it difficult to stably support the loaded cardboard sheet, but also increases the load of the cardboard sheet protruding by the kicker and increases the end face of the cardboard sheet. The cardboard sheet with the largest area may be damaged and the cardboard sheet with the smallest area may be damaged. Suction force for the sheet has a problem that lowering effect can not be obtained a stable projecting load due kicker changes randomly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cardboard sheet feeding apparatus which solves such a problem.

[Means for solving the problem]

In order to achieve the above object, a cardboard sheet feeding device according to the present invention is directed to a cardboard sheet loaded on a paper feed unit, one sheet of which is moved by a kicker that reciprocates back and forth on a movable table, and a lower end of a gate stopper. In the cardboard sheet supply device that is sent out from the supply port,
The paper feed unit is formed by a roller table including a plurality of rollers provided at small intervals in the front-rear direction between a pair of chains, and the chain of the roller table is bridged between the front and rear sprocket wheels and connected to the movable table. The movable table is moved back and forth to change the cardboard sheet mounting area of the roller table, and furthermore, an air intake means is provided below the roller table.

[Action]

When the movable table is moved forward, the chain connected to the rear end of the movable table is pulled and moves forward together with the movable table, while the roller connected to the front side of the movable table in accordance with the movement. The front side of the table moves rearward from below via the front sprocket wheel, and the area of the roller table on which the cardboard sheets are placed is reduced.

Also, when the movable table is retracted, contrary to the above,
In accordance with the retreat, the rollers accommodated below the front sprocket wheel are sequentially fed out from the front sprocket wheel to the cardboard sheet feeder side, and the cardboard sheet mounting area of the roller table increases.

As described above, the movable table is moved in the front-rear direction according to the size of the corrugated cardboard sheet, thereby changing the corrugated cardboard sheet mounting area of the roller table forming the paper supply unit. In addition, the stacked cardboard sheets appear stably and support the stacked cardboard sheets in a stable state, and the suction force from between the rolls acts uniformly, so that the kicker can stably reduce the pushing load.

〔Example〕

The embodiment of the present invention will be described with reference to the drawings. FIG. 1A shows a paper feeding unit for storing cardboard sheets in a stacked state, and a front horizontal frame member (11) and rearward from both sides of the frame member (11). The roller table (1) is provided on a space surrounded by the horizontal frame members (12) and (12) arranged side by side, and forms a cardboard sheet mounting surface of the sheet feeding section (A) in the space. ) Is provided.

This roller table (1) is a frame material (12) (12)
The two horizontal frame members (12) are provided on both sides of the front end of a movable table (2) which is erected back and forth between the rear upper surfaces.
One end of a pair of chains (3) and (3) stretched along the opposing inner surface of (12) is connected, and the chains (3) and (3) are connected.
Roller (4) (4)
.. (4) is rotatably mounted, and a plurality of rollers (from the front end of the movable table (2) to a portion corresponding to a length on which a cardboard sheet (a) having a maximum size can be placed. 4) (4)... (4) are provided.

(5) is a front sprocket wheel that spans the pair of chains (3) and (3) rotatably supporting both ends of the roller (4), and is adjacent to the front horizontal frame member (11) on both sides. The chains (3) and (3), which are rotatably supported on the inner surfaces of the front ends of the horizontal frame members (12) and (12), and which extend over the sprocket wheel (5), are inverted and extend rearward. The rear sprocket wheels (8) (9) are rotatably supported on the upper and lower portions of the inner surfaces opposed to the rear ends of the horizontal frame members (12) (12) via the intermediate sprocket wheels (6) (7). ), And the other end is connected to both sides of the rear end of the movable table (2).

Therefore, when the movable table (2) is moved in the front-rear direction, the chains (3) and (3) endlessly move between the front and rear sprocket wheels.

(10) is a kicker that reciprocates in the front-rear direction on the movable table (2). The cardboard sheet (a) loaded on the roller table (1) is addressed to one sheet from the bottom and the front horizontal member. A pair of upper and lower delivery rollers (15) from a supply port (14) formed between the lower end of a gate stopper (13) vertically suspended on both sides of the horizontal member (11) and the horizontal member (11).
(15).

(16) is a fixed intake box surrounding the roller table (1) below the roller table (1) of the front sprocket wheel (5). The upper end and the rear side are open, and the intake source (not shown) is provided on the lower surface. An intake port (21) communicating with the facility has been opened.

(17) is a movable intake box surrounding the lower space portion of the movable table (2), the upper end of which is integrally fixed to the lower surface of the movable table (2), and the front surface facing the fixed intake box has an opening. And an intake port (22) communicating with an intake source is provided on the lower surface thereof.

Further, an elastic non-breathable cover (18) is interposed between the fixed intake box (16) and the movable intake box (17), and both front and rear edges of the cover (18) are connected to the fixed intake box (16). It is connected to the movable intake box (17) in an airtight manner from the bottom surface to both side surfaces of the opposed surface, and through the inside of the cover (18), the front and rear intake boxes (16) (1)
7) The suction force generated inside is applied to the lower surface of the stacked cardboard sheet (a) through the rollers of the roller table (1).

The chain (3) (3) of the roller table (1)
The intermediate sprocket wheel (6)
(7) is rotatably supported by the movable suction box (17) and moves integrally with the movable table (1).

(19) is a rear stopper provided on the movable table (2) so as to be movable back and forth integrally with the movable table (2).

As shown in FIG. 3, the movable table (2) is provided with a support protruding plate (20) having an appropriate length from the center of the front end face thereof and protruding forward in the horizontal direction. Roller (4) between chains (3) (3) facing both end faces
The roller (4a) having a shorter length than the roller (4)
The rollers (4a) are rotatably mounted at the same intervals as in (4), and the upper peripheral portions of these rollers (4a) are projected from the upper surface of the support projection plate (20).

Referring to the manner of use of the cardboard sheet feeding device configured as described above, as shown in FIG. 1, when a large-sized cardboard sheet (a) is supplied, the movable table (2) is moved backward and the gate is moved. The distance between the stopper (13) and the rear stopper (19) on the movable table (2) side is increased.

At this time, the chains (3) and (3) are pulled rearward by the retreat of the movable table (2), and a group of rollers bridged between the chains (3) and (3) is moved from the front sprocket wheel (5). The roller table (1) is fed out to the cardboard sheet mounting surface side to form a roller table (1) having a large area, and the movable intake box (16) retracts integrally with the movable table (2) while expanding the cover (18).

In this way, the sheet feeding section (A) until the roller table (1) has an area on which the large cardboard sheet (a) can be placed.
When stretched to the side, large cardboard sheets (a) are supplied in a stacked state between the gate stopper (13) and the rear stopper (19), and the lower surface thereof is supported on the roller table (1).

Further, when the suction force is generated between the front and rear suction boxes (16) and (17) through the suction ports (21) and (22), the suction force is distributed at regular intervals in the length direction of the sheet feeding section (A). The lower surface of the lowermost cardboard sheet (a) is uniformly sucked over the entire lower surface of the roller table (1) through the gap between the rollers (4) of the provided roller table (1), and is brought into close contact with the roller table (1). .

In this state, the kicker (10) is operated, and when the kicker (10) advances, the front end face abuts against the rear end face of the lowermost cardboard sheet (a) to feed the cardboard sheet (a) into the supply port (14).
From the delivery rollers (15) and (15).

At this time, the cardboard sheet (a) rotates the roller (4) of the roller table (1) to reduce the frictional force with the lower surface thereof, and the roller table (1) is rotated by the suction operation.
Even if the adsorbing force of the cardboard sheet (a) on the surface increases, it can be sent out reliably and smoothly.

Next, when a small cardboard sheet (a ') is to be fed, as shown in FIG. 2, the movable table (2) is advanced to move the gate stopper (13) and the movable table (2). Reduce the distance between the side rear stopper (19).

At this time, the chains (3) and (3), which are stretched over the rear sprocket wheels (8) and (9), are pulled forward by the advance of the movable table (2), while the intermediate sprocket wheels (6) and (7) are moved. Chain (3) suspended over the front sprocket wheel (5) via
(3) The side moves rearward, and the roller table (1) between the front sprocket wheel (5) and the movable table (3).
Are moved downward from the front sprocket wheel (5) and are accommodated in the intake boxes (16) and (17), and a plurality of rollers (4) required for placing the small-sized cardboard sheet tool (a '). Only on the sheet feeding section (A).

At the same time, the movable intake box (17) approaches the fixed intake box (16) while contracting the cover (18),
Reduce the intake chamber between the two.

In this manner, the roller table (1) is moved and adjusted until the roller table (1) has an area on which the small cardboard sheet (a ') can be placed, and then the gate stopper (13) and the rear stopper ( 19) In the meantime, small cardboard sheets (a ') are supplied in a stacked state, and the lower surface thereof is supported on the roller table (1), and the lower surface of the lowermost cardboard sheet (a) is sucked by suction. The kicker (10) is actuated while holding the roller table (1) in close contact with the entire surface uniformly, and the cardboard sheet (a ') is addressed to one delivery roller (15) (15). It is sent to the side.

Further, as the movable table (2) advances, a work space (23) is formed between the horizontal frame portions (12) (12) on the rear side of the table, and an operator enters this space to feed paper. Can be performed.

〔The invention's effect〕

As described above, according to the cardboard sheet supply device of the present invention, the paper feed unit is formed by a roller table including a plurality of rollers provided at small intervals in the front-rear direction between a pair of chains. The chain is stretched between the front and rear sprocket wheels and connected to the movable table to change the mounting area of the cardboard sheet on the roller table by moving the movable table back and forth, so that the movable table is moved forward and backward. The mounting area of the cardboard sheet on the roller table can be set quickly and accurately according to the size of the cardboard sheet. In addition, a plurality of rollers forming the roller table are arranged at regular intervals. Therefore, even if the mounting area of the cardboard sheet is changed, the number of rolls Not only can appear and support the loaded cardboard sheet in a stable state, but also the suction area by the suction action from below can be changed in proportion to the size of the cardboard sheet, and the suction force from between the rolls By acting uniformly over the entire lower surface of the corrugated cardboard sheet, a stable effect of lowering the protrusion load by the kicker can be obtained.

Further, a working space can be formed between the chains at the rear of the movable table by moving the movable table forward, and a sheet feeding operation or the like can be smoothly performed using this space.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention. FIG. 1 is a simplified vertical sectional side view thereof, FIG. 2 is a simplified vertical sectional side view showing a small cardboard sheet feeding state, and FIG. is there. (A): paper feeder, (1): roller table, (2)
...... Movable table, (3) (3) ... Chain, (4)
... rollers, (5) to (9) ... sprocket wheels, (10) ... kickers, (13) ... gate stoppers, (16) (17) ... intake boxes, (a) ... cardboard sheets.

Claims (2)

(57) [Claims] 1. A cardboard sheet feeding apparatus in which a cardboard sheet stacked on a sheet feeding unit is sent out from a lower end supply port of a gate stopper to a single sheet by a kicker reciprocating in a front-rear direction on a movable table. The paper feed unit is formed by a roller table composed of a plurality of rollers provided at small intervals in the front-rear direction between a pair of chains, and the chain of the roller table is bridged between the front and rear sprocket wheels and the movable table. The movable table is connected and moved forward and backward to change the cardboard sheet mounting area of the roller table,
Furthermore, a cardboard sheet feeding device, wherein an air intake means is provided below the roller table. 2. The intake means comprises: a fixed intake box disposed below a front sprocket wheel; and a movable intake box which moves integrally with the movable table below a movable table. The cardboard sheet feeding device according to claim 1, wherein the spaces are connected by a telescopic non-breathable cover, and the bottoms of both boxes are connected to an air inlet.