JP2001171617A - Sheet take-out apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the height of a sheet take-out apparatus comprising a sheet magazine to stock packaging sheets in a stacked condition and a sheet take-out arm having a sheet suction piece to be moved in the perpendicular plane between the sheet take-out position abutted on the packaging sheet on the face of the sheets in the stacked condition and the sheet discharge position. SOLUTION: The sheet take-out arm 6 comprises a lower arm 56 to be turned in the perpendicular plane around a support shaft disposed below the sheet discharge position and an upper arm 54 which is turnably connected to a turning tip part of the lower arm 56 and provided with the sheet suction piece 16 so as to be turned in the plane in which the lower arm 56 is turned, and a posture setting means to set and change the relative posture of the sheet suction piece 16 and the sheet magazine 30 at the sheet take-out position so that the sheet suction port at the tip of the sheet suction piece 16 is abutted on and parallel to the packaging sheet 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet take-out apparatus, for example, an apparatus for supplying a packing sheet for packing a packaged object such as a canned beverage in a certain number unit to a packing station one by one. can do.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional sheet dispenser for supplying packaging sheets (sheets in a form in which packaging boxes are developed) one by one to a packaging machine which packs a predetermined number of articles to be packaged such as canned beverages. It is sectional drawing of an apparatus. A spindle is installed inside the device body (11).
A sheet take-out arm that rotates up and down around (21)
(13) is provided, and the sheet take-out arm (13) is provided.
There is a sheet suction tool for sucking the packaging sheet (31) described later
(16) and (16) are provided.
6) can be slid and fixed in the longitudinal direction of the sheet take-out arm (13) so that an arbitrary height position on the surface of the packaging sheet (31) can be sucked. This makes it possible to cope with a change in the size of the packaging sheet (31). At a position sandwiching the sheet take-out arm (13) from the front-rear direction of the paper surface of FIG. 5, a pair of conveyors (14) (14) running in parallel is provided, and the conveyors (14) (1)
Transport claws (12) (12) are arranged at a predetermined pitch on the outer periphery of (4).

A sheet magazine (30) for stocking a group of packaging sheets (31) (31) in a stacked state is provided above the sheet take-out arm (13).
(30) includes an under plate (33) on which a group of packaging sheets (31) and (31) is placed, and a sheet presser (34) for pressing the upper side of the group of packaging sheets (31) and (31). The presser (34) can move up and down in accordance with the size of the packaging sheets (31) and (31). Above the conveyors (14) and (14), sheet bending guides (41) and (41) arranged at intervals in the width direction of the conveyors (14) and (41) stand up, and the sheet bending guides (41) and (41) The sheet take-out arm (13) can be turned up and down between the parts (41) and (42).

In this case, a packaging sheet (31) on the surface of a group of packaging sheets (31) (31) housed in a sheet magazine (30) is provided.
In a state where the sheet suction members (16) and (16) are in contact with each other (the state shown by the imaginary line in FIG. 5), a vacuum device (not shown) is operated and the inside of the sheet suction members (16) and (16) is in a negative pressure state. Thus, the packaging sheet (31) is adsorbed by the sheet adsorbers (16) (16). In this state, the sheet take-out arm (13) is moved to the conveyor (14) (1
4), the upper part of the packaging sheet (31) comes into contact with the sheet bending guides (41) and (41) during the rotation, whereby the packaging sheet (31) is formed along the preformed fold. ) Is bent into an L-shape and the conveyor claws (12) (1) on the conveyors (14) (14)
2) It is set to a horizontal state during.

Next, while the negative pressure in the sheet suction devices (16) and (16) is released, the objects to be packaged (A) and (A) are placed on the packaging sheet (31) bent in an L-shape. This is the conveyor
(14) The above-mentioned wrapping sheet (3
1) is appropriately folded into a box to complete the packaging. In this case, since the sheet suction members (16) (16) can be fixed in a slidable state at any position in the longitudinal direction of the sheet take-out arm (13), the size of the packaging sheets (31) (31) Even if the shape or shape is changed, the packaging sheet (31)
The appropriate height position can be sucked by the sheet suckers (16) (16).

[0006]

However, in the above-mentioned conventional apparatus, the packaging sheet (31) taken out from the sheet magazine (30) is set horizontally so as to be along the conveying surface of the conveyor (14) (14). In this case, it is necessary to provide a support shaft (21) serving as a rotation fulcrum of the sheet take-out arm (13) at substantially the same height as the above-mentioned transport surface. Cannot be provided. Also, in order to enable the sheet suction members (16) (16) to be able to adsorb the vicinity of the lower end of the wrapping sheet (31) in the sheet magazine (30), the height is almost the same as the conveying surface of the conveyor (14) (14). It is necessary to arrange the sheet magazine (30) at a position higher than the support shaft (21) located at the position. Therefore, in the above-described conventional apparatus, the sheet magazine (30) must be disposed at a position higher than the conveying surface of the conveyors (14), (14), and the height of the entire apparatus becomes large, which causes a problem. was there.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and is directed to a sheet magazine (30) for stocking a group of packaging sheets (31) and (31) in a stacked state, and A sheet pick-up device provided with a sheet pick-up arm that moves in a vertical plane between a sheet pick-up position and a sheet discharge position in contact with a packaging sheet (31) on a certain surface, '' It is an object of the present invention to reduce the height of the sheet take-out device as compared with the above-mentioned conventional one.

[0008]

Means for Solving the Problems [1] The technical means of the present invention for solving the above-mentioned problems is as follows: "The sheet take-out arm is centered on a support shaft arranged below the sheet discharge position. A lower arm that rotates in the vertical plane; and a sheet suction member rotatably connected to a rotation tip of the lower arm so as to rotate in a plane in which the lower arm rotates. The sheet suction tool and the sheet magazine at the sheet take-out position such that the sheet suction port at the tip of the sheet suction tool contacts the packaging sheet (31) in a parallel state. Attitude setting means for setting and changing the relative attitude of (30) is provided. "

The above technical means works as follows. In this device, when the lower arm and the upper arm connected to the distal end of the lower arm rotate, the sheet suction device attached to the upper arm moves to the sheet take-out position, and the packaging sheet (31) on the front surface in the stacked state Abut. In this case, according to the above technical means, the relative posture of the sheet suction tool and the sheet magazine (30) is set such that the sheet suction port at the tip of the sheet suction tool contacts the packaging sheet (31) in a parallel state. -Since the changing posture setting means is provided, the sheet suction port at the tip of the sheet suction tool can be brought into contact with an arbitrary height position of the packaging sheet (31) in a parallel posture.

When the size or shape of the packaging sheets (31) is changed and it is necessary to change the suction height at which the packaging sheets (31) are suctioned by the sheet suction tool, the sheet suction tool is used. Of the lower arm with respect to the horizontal and the relative position of the upper arm with respect to the horizontal when the sheet suction device is moved to the above-described sheet extracting position. What is necessary is just to change an angle. Then, along with this change, the relative attitude between the sheet suction tool and the sheet magazine (30) is set by the attitude setting means so that the sheet suction port at one end of the sheet suction tool can be brought into contact with the packaging sheet (31) in parallel. Adjust and set.

[Item 2] In the above item 1, the sheet magazine may be such that "the attitude setting means is a mechanism for adjusting the inclination angle of the sheet magazine (30) with respect to the horizontal".
By adjusting the inclination angle of (30), the packaging sheet (31)
The sheet suction port of the sheet suction tool can be brought into parallel contact with the sheet suction tool.

[3] The method according to the above [1], wherein the attitude setting means is attached to the upper arm so as to be swingable so that the sheet suction device rotates in a plane in which the upper arm rotates. In this mechanism, the sheet suction tool swings and causes the sheet suction port of the sheet suction tool to contact the packaging sheet (31) in parallel.

[Item 4] In the above item 1 to item 3, wherein the upper arm and the lower arm are rotated by a servomotor, the amount of rotation of the upper arm and the lower arm can be numerically controlled.

[0014]

According to the present invention having the above configuration, the following specific effects are obtained. Since the support shaft of the lower arm, which is the pivot of the entire sheet take-out arm, can be disposed below the sheet discharge position, the corresponding support shaft (21) can be disposed almost at the same level as the conveyor surface of the sheet discharge position. The disposition position of the sheet take-out arm can be made lower than that of the above-described conventional one which needs to be set at the same height. Accordingly, the position of disposing the sheet magazine (30) together with the sheet take-out arm can be lowered, so that the overall height of the apparatus is reduced.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a packaging machine provided with a sheet removing device according to an embodiment of the present invention. The packaging machine body (99) includes a sheet take-out arm (6), a pair of conveyors (14) (14) disposed at positions sandwiching the sheet take-out arm (6) from both sides, and the conveyor (14). A sheet bending guide (71) disposed above (14) and a packaging sheet (31)
(31) A sheet magazine (30) for stocking the groups in a stacked state is provided.

The details of each section will be described below. [Conveyors (14) and (14)] A pair of conveyors (14) and (1) disposed in parallel with a space in front of and behind the paper surface of FIG.
4) includes sprockets (17) and (17) and conveyor chains (140) and (140) hooked on the sprockets, and the outer circumference of the conveyor chains (140) and (140) is the same as the conventional one described above. The transport claws (12) are arranged at a predetermined pitch.

[About the sheet take-out arm (6)] FIG.
As shown in FIG. 2, a sheet take-out arm (6) provided between the conveyors (14) (14) includes a pair of brackets (53) (53) ) Is rotatably connected to a drive shaft (55) rotatably penetrating therethrough, and an input end of the drive shaft (55) is jointed to an output shaft (59) of a first servomotor (58). 57). Therefore,
1st servo motor (58) by signal from control device not shown
Is rotated, the drive shaft connected to its output shaft (59)
(55) rotates integrally with the lower arm (56), whereby the angle of the lower arm (56) with respect to the horizontal is adjusted.

An intermediate shaft (52) is provided at the pivotal end of the lower arm (56).
Are rotatably penetrated, and both ends of the intermediate shaft (52) are formed in a square shaft shape, and the square shaft portion is a lower arm.
It protrudes from both sides of (56). And the said square shaft part is a square hole (560) formed in the base end part of a pair of upper arms (54) (54).
(560) is inserted in the detent state,
The intermediate shaft (52) and the upper arms (54) (54) can rotate integrally.

One end of the intermediate shaft (52) is connected to one upper arm (5
4), and a driven sprocket (50) is attached to the protruding portion.The driven sprocket (50) is connected to the drive shaft () at the base end of the lower arm (56). 55)
And a drive-side sprocket (62) mounted on a rotary shaft (61) coaxial with the drive shaft (61) via a chain (64). And, the rotating shaft (61) including the driving sprocket (62)
Is connected to the output shaft of the second servomotor (65) via a joint (63). Therefore, when the second servomotor (65) is rotated, the driving sprocket (62) is rotated, and this rotational motion is transmitted to the driven sprocket (50) through the chain (64), and the driven sprocket (50) is rotated. The intermediate shaft (52) connected to the upper arm (54) rotates together with the upper arms (54) and (54).
Thereby, the rotation angle of the upper arms (54) and (54) with respect to the lower arm (56) can be adjusted. As shown in FIG. 1, a ventilation path (26) is formed in each of the upper arms (54), and a bellows-shaped sheet adsorber (16) communicating with the ventilation path (26) is provided.
(16) are separately attached to the upper arms (54).

Each air passage (26) formed in each upper arm (54)
Flexible hoses (24) are respectively connected to the upstream ends of the flexible hoses, and the flexible hoses (24) are connected to a vacuum device (23). Therefore, when the inside of the vacuum device (23) is in a reduced pressure state, the negative pressure at this time is transmitted to the sheet suction members (16) (16) via the flexible hose (24) and the ventilation path (26),
Thereby, the packaging sheet (31) can be sucked by the sheet suction port at the tip of the sheet suction tool (16).

[Regarding the sheet magazine (30)] The sheet magazine (3) provided near the sheet take-out arm (6)
(0) is mounted on a lifting board (37) which is disposed on the base (36) so as to be able to move up and down, and the height of the lifting board (37) is adjusted by a lifting handle.
It can be adjusted by the rotation of (38). That is, when the lifting handle (38) is rotated, the protruding length of the support rods (39) (39) from the base (36) changes, and the lift supported by the upper ends of the support rods (39) (39) The height of the board (37) is adjusted. A slide block (28) whose vertical width is reduced toward the tip is mounted on the lift board (37), and a support arm standing from both ends of the lift board (37) is mounted on the slide block (28). (32)
A feed screw (29) supported by (32) is threaded through.

A pair of magazine holding plates (74) opposed to the paper surface of FIG.
A sheet magazine (30) is held by the magazine holding plates (74) and (74). The sheet magazine (30) includes rollers (77) and (77) disposed in a state of being bridged between both ends of the pair of side plates (76) and (76), and the rollers (77) and (77). The wrapping sheet (3) is placed on the belt (78)
1) The (31) group is mounted. Therefore, FIG.
If the sheet magazine (30) is inclined so as to be lower toward the conveyors (14) (14) as shown in
(31) With the weight of the group (31), the belt (78) naturally tries to run to the sheet take-out arm (6) side, whereby the packaging sheet (3
1) The group (31) is always unevenly distributed at the end on the sheet take-out arm (6) side.

The side plates (76) (7) holding the rollers (77) (77)
The fulcrum shafts (79) and (79) protruding from 6) are, as shown in FIG.
The magazine holding plate (74) (7) standing from both sides of the lift board (37)
It is rotatably inserted into the insertion hole (70) (70) of 4).
Also, the sliding shafts (72) (7) protruding outward from the side plates (76) (76)
2) is slidably inserted into the arc-shaped long holes (73) (73) formed in the magazine holding plates (74) (74). FIG.
As shown in the side plate above the side plate (76)
(80) (80) are connected in series, these side plates (80)
The packaging sheets (31) and (31) are accommodated in a stacked state between the (80) and the guide grooves (81) (see FIG. 1) formed vertically along the inner surface of the side plate (80). The sheet holding claw (82) can be moved up and down along. The bent end portion (83) of the sheet pressing claw (82) is engaged with the upper edge of the packaging sheet (31) on the surface of the magazine (30) on the exit (300) side.

[Sheet bending guide (71)] A side plate (43) having horizontal slits (42) (42) extending in parallel with the conveyors (14) (14) is provided above the conveyors (14) (14). Side plate
A sheet bending guide (71) movable in the longitudinal direction of (43) is attached to the side plate (43). The sheet bending guide (71)
Has a vertical plate (45) having a curved upper portion, and a mounting plate (46) bent from the side thereof. And this mounting plate (46) is a fastening bolt that passes through the horizontal slits (42) (42) of the side plate (43).
(47) (47) and nuts (48) (48)
Fixed to 3). Therefore, when the nuts (48) and (48) are loosened, the sheet bending guide (71) can be moved along the horizontal slits (42) and (42), thereby adjusting the position of the sheet bending guide (71). Can be. In addition, conveyor (14) (14)
Upper and lower slits formed on an upright plate (91) standing upright
Tightening bolts (93) and (93) are inserted through the overlapping portions of the horizontal slits (42) and (42) of the side plate (43) and the fastening bolts (93) and (93). The side plate (43) and the upright plate (91) are connected by the combined nut (94). Therefore, when the fastening bolts (93) (93) and the nuts (94) (94) are loosened, the height of the mounting plate (46) together with the side plate (43) can be adjusted.

[Actual Operation] Next, the operation of the packaging machine having the sheet take-out device will be described. As shown in FIG. 1, a group of wrapping sheets (31) and (31) is stored in a stacked state in a sheet magazine (30), and then the base
The protruding length of the support rods (39) and (39) from (36) changes, whereby the elevator (37) moves up and down together with the sheet magazine (30) to adjust the height of the sheet magazine (30). it can. Next, when the feed screw (29) is rotated by the angle adjusting handle (27), the slide block (28) moves in the axial direction of the feed screw (29), and thereby, is mounted on the slide block (28). The side plate (76) provided with the inclined legs (85) is rotated about the fulcrum shaft (79) to adjust the inclination angle (the inclination posture with respect to the horizontal) of the sheet magazine (30). Therefore, in the present embodiment, the angle adjustment handle (27), the feed screw (29), and the slide block (2
8) and the combination of the inclined legs (85) placed in this state correspond to the attitude setting means described above. As described above, the position and the inclination angle of the sheet magazine (30) can be set to appropriate values by the rotation of the lifting handle (38) and the angle adjustment handle (27).

Next, tightening bolts (93) and (93) and nuts (9
4) Loosen (94), then move the side plate (43) up and down along the vertical slit (92) and then tighten the nuts (94) (94) and the tightening bolts (93) (93) again. The side plate (43) can be adjusted to an appropriate height. Also, tightening bolts (47) (47) and nuts (48)
After loosening (48), the sheet bending guide (71) is moved along the horizontal slits (42) (42) of the side plate (43), and then the tightening bolts (47) (47) and nuts (48) ( 48), the sheet bending guide (7) in the running direction of the conveyor (14) (14)
The position of 1) is fixed. Next, when an operation switch (not shown) is turned on, the conveyors (14) and (14) start running, and the first servomotor (58), the second servomotor (65), and the vacuum device (23) start operating.

A first servomotor (58) and a second servomotor
When (65) rotates a predetermined angle, the lower arm (5
(6) and the upper arm (54) rotate in the vertical plane about the drive shaft (55) and the intermediate shaft (52), whereby the lower arm (56) and the upper arm (56) of the sheet take-out arm (6) are rotated. The arm (54) assumes the posture shown by the imaginary line in FIG. As a result, the packaging sheet (31) (3
In the group (1), the sheet suction members (16) and (16) come into contact with the packaging sheet (31) on the surface of the outlet (300) of the magazine (30). That is, the sheet suction members (16) and (16) are in a state of being moved to the sheet extracting position. In this state, the vacuum device (2
The negative pressure in 3) is transmitted through the flexible hose (24) → upper arm (54) → sheet suction device (16) (16), whereby the sheet suction device (16) (16) The packaging sheet (31) is adsorbed.

Next, the amount of rotation of the first servomotor (58) and the second servomotor (65) is controlled by a control signal from the control device, whereby the lower arm (56) shown by the imaginary line in FIG. And the upper arm (54) rotates so as to be in the state shown by the solid line.
Then, during the rotation, the upper end side of the packaging sheet (31) comes into contact with the sheet bending guide (71), whereby the sheet bending guide (71) is formed into an L shape along a fold formed in advance. The sheet is bent, and the bent portion is set between the conveyance claw (12) located immediately below the sheet bending guide (71) and another conveyance claw (12) adjacent to the conveyance claw in the conveyance direction rearward (sheet discharge position). .
In addition, the lower end of the packaging sheet (31) is the other conveying claw (12).
It is bent by contacting the upper end of. Then, on the packaging sheet (31) in this state, the articles to be packaged (A) and (A) are placed from a supply device (not shown), and thereafter, when the conveyors (14) and (14) run, the sheet bending guide (71) is provided. ) At the lower end of the packaging sheet (3
The upper part of (1) (the part above the package (A) (A)) is bent horizontally, so that the upper surface of the package (A) (A) is part of the packaging sheet (31). Covered. Then the packaging sheet
The peripheral part of (31) is appropriately bent and shaped into a box shape, whereby the packaging operation is completed, and this is carried out on the conveyor (1).
4) Conveyed to the downstream side in (14).

In this case, the drive shaft (55) located at the base end of the sheet take-out arm (6) can be provided below the transport surface, which is the upper surface of the conveyors (14) (14). The arrangement height of the sheet magazine (30) can be made lower than that of the above-described conventional one in which it is necessary to provide the support shaft (21) almost in the same manner as the above. In addition, when changing the suction height position of the sheet suction tools (16) and (16) abutting on the packaging sheet (31) at the outlet (300) portion in the magazine (30), use the changed height position. The bent shape of the sheet take-out arm (6) at the time of the contact is set so that the sheet suction members (16) and (16) come into contact with the packaging sheet (31) at the outlet (300) of the magazine (30). That is, at the time of taking out the sheet (when taking out the packaging sheet (31) from the magazine (30)), the sheet suction tools (16) and (16) come into contact with the packaging sheet (31) at the above-mentioned suction height position. Set the relative angle between the upper arm (54) and lower arm (56), and furthermore, the angle adjustment handle
By rotating the magazine (30) to change the inclination angle of the magazine (30), the sheet suction port at the tip of the sheet suction tool (16) (16) abuts on the packaging sheet (31) in parallel when taking out the sheet. To do.

In the above embodiment, as described above, the angle of inclination of the magazine (30) for housing the group of packaging sheets (31) with respect to the horizontal can be adjusted. Thereby, at the sheet take-out position where the sheet suction tools (16) and (16) come into contact with the packaging sheet (31) in the magazine (30), the sheet suction port at the tip of the sheet suction tools (16) and (16) is The relative attitude of the sheet suction tools (16) (16) and the sheet magazine (30) can be adjusted so as to abut against the surface of the packaging sheet (31) in a parallel state. On the other hand, as shown in FIG.
4) At the tip of the shaft, in the same direction as the rotation direction of the upper arm (54),
(18) A suction device mounting arm (19) that rotates about the center is provided, and the sheet suction device (16) (16) is attached to the suction device mounting arm (19).
May be held. And the upper arm (54)
An arc-shaped long hole (68) is formed in the enlarged portion (67) near the tip of the clamp bolt (87) and nut (88) inserted from the suction tool mounting arm (19) into the arc-shaped long hole (68). ) With the suction device mounting arm (1
9) may be rotatably held by the enlarged portion (67) as an attachment portion. In this device, with the tightening bolt (87) and the nut (88) loosened, the suction device mounting arm (19) is rotated with respect to the enlarged portion (67), and in this state, the tightening bolt (87) is again rotated. And nut (88), tighten the upper arm (54)
The bending angle of the suction device mounting arm (19) at the distal end of is set. Therefore, as shown in FIG.
Even if the inclination angle of (30) cannot be adjusted, by adjusting the bending angle of the suction device mounting arm (19), the sheet suction device (16) ( 1
The sheet suction port at the tip of 6) can be contacted in parallel. Accordingly, in FIG. 4, the tightening bolt (87) and the nut (88) correspond to the means for fixing the suction device mounting arm in a state of being rotated with respect to the mounting portion.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a packaging machine provided with a sheet take-out device according to an embodiment of the present invention.

FIG. 2 is a side view of an arrangement portion of a sheet take-out arm (6).

FIG. 3 is a longitudinal sectional view of an arrangement portion of a sheet magazine (30).

FIG. 4 is a side view of a main part showing a modification of the upper arm (54).

FIG. 5 is an explanatory view of a conventional example.

[Explanation of symbols]

 (6) ... sheet take-out arm (16) ... sheet suction tool (30) ... sheet magazine (31) ... packaging sheet (54) ... upper arm (56) ... lower arm

Claims (4)

[Claims] 1. A sheet magazine (30) for stocking a group of wrapping sheets (31) and (31) in a stacked state, and a sheet taking-out position and a sheet discharging position in contact with the wrapping surface (31) in the stacked state. And a sheet pick-up arm having a sheet pick-up arm mounted thereon that moves in a vertical plane between the sheet pick-up arm and the sheet pick-up arm. A lower arm that pivots in the vertical plane at the center; and a rotatable tip of the lower arm so as to pivot in a plane in which the lower arm pivots. The sheet suction tool at the sheet take-out position so that the sheet suction port at the tip of the sheet suction tool abuts in parallel with the packaging sheet (31). Set / change the relative attitude of the magazine (30). Posture setting means for are provided, the sheet take-out apparatus. 2. The sheet unloading device according to claim 1, wherein the attitude setting unit is configured to adjust the position of the sheet magazine with respect to a horizontal direction.
A sheet take-out device for adjusting the inclination angle of (30). 3. The sheet ejection device according to claim 1, wherein the posture setting means swings the upper arm so that the sheet suction tool rotates in a plane on which the upper arm rotates. A sheet take-out device that is a mechanism that is freely mounted. 4. The sheet take-out device according to claim 1, wherein the upper arm and the lower arm are rotated by a servomotor.