JPH09221116A - Bag removing device of can cover packing body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency and simplify a structure by enabling cutting and removing of a bag in a single stage. SOLUTION: On a pair of rollers 2 and 3 arranged in parallel with each other at an interval, a can cover packing body Z is supported. The rollers 2 and 3 are rotated in directions contrary to each other so as to form a slackened part of a bag between the rollers 2 and 3. A holding device 4 holds the slack, gives tensile force to the slack, and breaks it by a cutter 5. After the slackened part of the bag is broken by the cutter 5, the holding device 4 descends and pulls down the bag in a state that the head end of the slackened part is being held and removes it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag removing device for a can lid package for removing a bag from a can lid package in which a can lid group consisting of a large number of can lids is packaged in a bag.

[0002]

2. Description of the Related Art Conventionally, a bag removing device for a can lid package, which is disclosed in Japanese Patent Publication No. 56-41498, has been known. According to this type of bag removing device, as shown in FIG. 7A, the can lid packaging body Z in which a large number of can lid groups X are packaged in the bag Y is provided in the gutter 5.
The upper part of the bag Y is gripped by the gripping device 51. Subsequently, as shown in FIG. 7B, the gripping device 51 moves upward to pick up the can lid packaging body Z, and at this time, the bag Y at the portion gripped by the gripping device 51 by the weight of the can lid packaging body Z. Apply tension to. In this state, the cutter 52 advances from the side of the gripping device 51, and the bag Y is cut along its longitudinal direction. Next, as shown in FIG. 7C, the gripping of the bag Y by the gripping device 51 is released. Thereafter, the can lid package Z is discharged from the gutter 50 and placed on the pair of stopped rollers 53 and 54 as shown in FIG. 7D. Then, by rotating the rollers 53 and 54 in opposite directions, the bag Y sandwiched between the rollers 53 and 54 is sent out below the rollers 53 and 54, and the bag Y is removed.

However, according to the above bag removing device, the bag Y
The work must be performed in a plurality of stages including a stage for cutting the bag (on the gutter 50) and a stage for removing the bag Y (on the rollers 53, 54), which is a disadvantage in that the apparatus becomes large in scale. Also, a can lid package Z in which the bag Y is broken
When the can lid group X is moved from the trough 50 to the rollers 53 and 54, means for preventing the can lid group X from jumping out of the inside of the can lid package Z from the broken portion of the bag Y is provided. Since it is necessary to maintain the packaging state, there is a disadvantage that the device configuration becomes complicated. Further, since the cutting work and the removing work of the bag Y are performed on different stages, there is an additional problem that the moving time between the stages is added and the work efficiency is reduced. Furthermore, since the rollers 53 and 54 rotate by sandwiching the bag Y, the bag Y may be wound around the rollers 53 and 54 itself, and there is a disadvantage that smooth removal of the bag Y cannot be expected.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above inconvenience, and according to the present invention, it is possible to cut and remove a bag in a single stage to improve work efficiency and simplify the structure of a can lid package. An object is to provide a bag removing device.

[0005]

In order to achieve such an object, the present invention stores a can lid group formed by laminating a large number of can lids in a cylindrical shape in a cylindrical bag, In a bag removing device for a can lid package formed by closing both sides of a bag, the can lid package is supported over the entire length with the axial direction of the can lid package being horizontal, and the can lid package is supported on the axis line of the can lid package. A pair of rollers rotatably provided in parallel with each other at a predetermined interval, and roller rotation for rotating the pair of rollers in opposite directions to form a slack portion of the bag of the can lid package between the rollers. The tip of the slack portion of the bag of the can lid package formed in the portion located between both rollers by the driving device and the lifting device is held by the roller rotation driving device and gripped over the entire length of the bag. Gripping device that can be lowered in the state, and in the state where it is gripped via the gripping device. A slack portion of the bag, wherein the slack portion of the bag is provided with a cutter that advances toward one side of the slack portion of which the tension is applied to one side and breaks one side of the slack portion over the entire length of the bag. After being broken by the cutter, the bag is pulled down and removed while holding the tip of the slack portion by descending.

According to the present invention, since both rollers are rotated in opposite directions by the roller rotation driving device to form a slack under the bag, the gripping device can securely grip the bag with the slack. it can. Then, the downward movement of the gripping device applies tension to the slack of the bag, so that the cutter can reliably break the bag. Then, the gripping device is lowered, and the bag gripped by the gripping device is pulled down. At this time, the cut bag is pulled down with the cutting edge on the side gripped by the gripping device as the leading end, and moved and taken along the outer periphery of the can lid group with the other cutting edge as the rear end. As described above, according to the present invention, the bag can be removed from the cutting while being held by the holding device by a series of operations, and the bag can be reliably pulled down and quickly removed.

Further, it is preferable that the roller rotation driving device reverses the rotation direction of one of the rollers located on the side broken by the cutter in synchronization with the pulling down and removal of the bag by the gripping device.

When the bag is broken by the cutter, the bag is interposed between the can lid group and each roller. Then, when the gripping device pulls down the bag with the cut edge on the gripped side as the tip, the trailing end side due to the other cut edge has a roller and a can lid group located on the side broken by the cutter. It moves along the outer circumference of the can lid group through the space.
At this time, the roller is rotated in the direction opposite to the rotation direction when the slack is formed on the bag. As a result, by the roller, the bag moving between the roller and the can lid group is sent out, and the bag can be smoothly pulled down and removed by the gripping device.

[0009]

An embodiment of the present invention will be described with reference to the drawings. 1 is an explanatory view showing a schematic configuration of the present embodiment, FIG. 2 is an explanatory view showing a main part from a direction indicated by an arrow II in FIG. 1, FIG. 3 is an explanatory view showing a gripping device and its operation, and FIG. 4 is a cutter device. And FIG. 5 to FIG. 6 are explanatory views showing the bag removing step.

The apparatus 1 of the present embodiment removes the bag Y from a can lid package Z in which a can lid group X formed by stacking can lids is packaged in a bag Y.

As shown in FIGS. 1 and 2, the apparatus 1 of the present embodiment has a pair of first and second rollers 2 and 3 for supporting the can lid package Z at the bag removing position A, and both rollers 2 and 3. The gripping device 4 for gripping the bag Y, which is vertically movable below the can lid package Z supported by, and the lower part of the second roller 3 advance and retreat toward the lower part of the can lid package Z. A cutter device 6 including a cutter 5 for cutting Y
And a pressing roller 7 for pressing the can lid package Z from above at the bag removing position A. Further, below the bag removing position A, a bag discharging device 8 for discharging the bag Y removed from the can lid package Z is provided, and the can lid group X from which the bag Y has been removed can be pushed up and discharged. A push-up device 9 is provided. Further, a can lid group maintaining device 10 for supporting the can lid packaging body Z at the bag removing position A from both ends and maintaining the arrangement state of the can lid group X is provided (see FIG. 2). Bag removal position A
An input path 11 for inputting the can lid package Z to the bag removing position A is provided on one side and a can lid group X from which the bag Y is removed on the other side.
A payout path 12 for paying out is provided. Although not shown, a transfer device for transferring the can lid package Z to the bag removing position A is provided in the input path 11, and the can 12 of the can lid group X is prevented from collapsing in the payout path 12. A holding device and a feeding device for maintaining the form of the can lid group X are provided.

Next, the above-mentioned parts will be described in detail. As shown in FIGS. 1 and 2, the first roller 2 and the second roller 3 are rotatably provided along the longitudinal direction of the can lid package Z so as to be spaced from each other so as to support the can lid package Z. Has been done. The rollers 2 and 3 are rotationally driven separately by a pair of motors 13 (only one of which is shown in FIG. 2). A motor (not shown) that drives the first roller 2 drives the first roller 2 clockwise in FIG. On the other hand, the motor 13 for driving the second roller 3 shown in FIG. 2 selectively drives the second roller 3 clockwise and counterclockwise in FIG.

As shown in FIGS. 2 and 3, the gripping device 4 is provided with a clamp member 15 which can be opened and closed via a pivot 14. The clamp member 15 is provided with a grip portion 16 on its front end side and handle portions 17a, 17b on its rear end side. A cylinder 18 is pivotally attached to one handle 17a via a support member 17c, and a piston rod 19 of the cylinder 18 is pivotally attached to the other handle 17b. The clamp member 15 is a piston rod 1 formed by a cylinder 18.
9 extends to open the grip 16 as shown in FIG. 3A, and contracts the piston rod 19 to close the grip 16 as shown in FIG. 3B. Also, the gripping device 4
Is equipped with a cylinder 20 for advancing and retracting the clamp member 15 via the pivot 14. Further, as shown in FIG. 1, the gripping device 4 is fixed to the tip of a swing arm 23 that swings via a support shaft 22 rotatably supported by a frame 21. At the rear end of the swing arm 23, the swing arm 2
A cylinder 24 for swinging 3 is connected. The cylinder 24 has its rear end connected to the frame 21.

As shown in FIG. 1, the cutter device 6 has a guide rod 26 extending on a pedestal 25 fixed to the frame 21, and a sliding member 27 slidable along the guide rod 26. And a cutter support member 28 connected to the sliding member 27. The cutter support member 28
As shown in FIGS. 1 and 4, is equipped with the cutter 5 at its tip and is moved forward and backward by a cylinder 29 provided on the pedestal 25. As shown in FIG. 4, the cutter 5 has a length corresponding to the entire length of the can lid package Z and has a saw-shaped cutting blade portion 30 formed at the tip. Further, the cutter 5 is provided on the cutter support member 28 so as to be slidable in the longitudinal direction, and the slide is driven by a cylinder 31 provided on one side of the cutter support member 28. Accordingly, when cutting the bag Y as described later, the cutting blade portion 30 of the cutter 5 is cut into the cylinder 31 after cutting the bag Y.
The cutter 5 is slid in the longitudinal direction thereof to reliably break the bag Y.

As shown in FIG. 1, the pressing roller 7 is provided on a rotating member 33 via a pivot 32 rotatably supported by the frame 21. The rotating member 33
Is a cylinder 3 whose rear end is supported by the frame 21.
4 is rotated about the pivot 32 by the drive of
The rotation of 3 allows the pressing roller 7 to come into contact with and separate from the can lid packaging body Z.

The discharging device 8 is equipped with a conveyor 35 for sending the bag Y removed from the can lid package Z in the discharging direction, and quickly discharges the bag from the bag removing position A.

As shown in FIG. 1, the push-up device 9 includes a push-up plate 36 which can be raised and lowered between a height position of the payout path 12 and a position where it does not interfere with the gripping device 4, and the push-up plate 36. And a cylinder 37 that drives the lifting and lowering of the.

As shown in FIG. 2, the suppressing device 10 has the following structure.
A pair of projecting members 38 and 39 that can move back and forth in opposite directions from both sides of the can lid package Z are provided, and each projecting member 3
A pair of cylinders 40 and 4 for projecting 8 and 39 in synchronization
1 is provided. As a result, when the can lid package Z is put into the bag removing position A, the projecting members 38 and 39 project and are accurately positioned at the bag removing position A, and when the bag Y is removed, the projecting members 38 and 39 are temporarily moved. Retract and project member 3
When the bag Y is removed from between the 8, 39 and the can lid, the bag Y is positioned at the bag removing position A in a state where the can lids of the can lid group X from which the bag Y has been removed are prevented from collapsing by protruding again. You can

Next, the process of removing the bag Y of the can lid package Z by the present embodiment 1 will be described. As shown in FIG. 1, the can lid packaging body Z that has been loaded along the loading path 11 is housed between the first roller 2 and the second roller 3 and is placed between the first roller 2 and the second roller 2.
It is supported by the roller 3. From this state, first
As shown in FIG. 5A, the pressing roller 7 descends to press the can lid package Z from above. Next, the first roller 2 is rotationally driven clockwise and the second roller 3 is rotationally driven counterclockwise. As a result, the bag Y of the can lid package Z is sent from both rollers 2 and 3 to form slack between the rollers 2 and 3. At this time, the clamp member 15 of the gripping device 4 is advanced upward by the cylinder 20 with the grip portion 16 opened. The grip portion 16 of the clamp member 15 is brought into an open state by the extension of the piston rod 19 of the cylinder 18, as shown in FIG.

Subsequently, as shown in FIG. 5B, the clamp member 15 of the gripping device 4 closes the gripping portion 16 by extending the piston rod 19 of the cylinder 18 (see FIG. 3). At this time, the slack of the bag Y formed between the rollers 2 and 3 is gripped by the grip portion 16 of the clamp member 15. Then, the clamp member 15 has the grip portion 16 thereof.
With the cylinder closed, the cylinder 20 retracts downward. As a result, tension is applied to the slack of the bag Y gripped by the grip portion 16. Next, the cutter 5 advances from below the second roller 3 and breaks the bag Y that is tensioned between the second roller 3 and the grip 16. At this time, as shown in FIG. 4 described above, the cutter 5 slides on the cutter support member 28 by the drive of the cylinder 29 to perform reliable breaking.

Thereafter, as shown in FIG. 6A, the swing arm 23 swings by driving the cylinder 24.
The clamp member 15 is moved to the bag Y by the swing of the swing arm 23.
Pull down. At this time, the first roller 2 is rotationally driven in the clockwise direction, which is the same direction as the rotational direction when the slack is formed on the bag Y. On the other hand, the second roller 3 is rotationally driven in the clockwise direction, which is opposite to the rotational direction when the slack is formed on the bag Y. As a result, the bag Y, which is broken and moves along the outer periphery of the can lid group X, is fed by the rollers 2 and 3 in the pulling direction by the gripping device 4.

Then, as shown in FIG. 6B, the grip portion 16 of the clamp member 15 is opened and the bag Y is discharged from the discharging device 8.
(See FIG. 1) It is dropped onto the top and discharged. On the other hand, the pressing roller 7 moves upward to release the pressing of the can lid group X, and at the same time, the cylinder 37 of the lifting device 9 is driven so that the lifting plate 36 is flush with the payout path 12 (see FIG. 1). By moving, the can lid group X from which the bag Y has been removed can be freely moved to the dispensing path 12.

Thereafter, the can lid group X from which the bag Y has been removed is dispensed along the dispensing path 12 in a state where the can lid is prevented from collapsing by a pressing device and a feeding device (not shown).

As described above, according to the embodiment of the present invention,
The bag Y can be cut and the bag Y can be removed in a single stage. Further, since the bag Y can be pulled down and removed in a state where the bag Y is gripped by the gripping device 4 after being cut, the bag Y is not wound around the rollers 2 and 3 and is swiftly wound. The bag Y can be removed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is an explanatory view showing a main part from a direction indicated by an arrow II in FIG.

FIG. 3 is an explanatory view showing a gripping device and its operation.

FIG. 4 is an explanatory plan view showing a cutter device.

FIG. 5 is an explanatory view showing a bag removing step.

FIG. 6 is an explanatory view showing a bag removing step following FIG.

FIG. 7 is an explanatory view showing a conventional bag removing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bag removing device, 2 ... 1st roller, 3 ... 2nd roller, 4
... gripping device, 5 ... cutter, 13 ... motor (roller rotation driving device), 20, 24 ... cylinder (elevating device), 23
... rocking arm (elevating device), X ... can lid group, Y ... bag, Z ...
Can lid packaging.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiro Iwase 25-26 Iwabuchi-cho, Kita-ku, Tokyo Iwase Manufacturing Co., Ltd.

Claims (2)

[Claims] 1. A bag removing device for a can lid package in which a can lid group formed by stacking a large number of can lids and having a cylindrical shape is housed in a cylindrical bag, and both sides of the bag are closed. In which the axial direction of the can lid package is horizontal, the can lid package is supported over its entire length, and the pair is rotatably provided at a predetermined interval in parallel with the axial line of the can lid package. Roller, a roller rotation driving device that rotates the pair of rollers in opposite directions to form a slack portion of the bag of the can lid package between the two rollers, and a lifting device that raises the roller to drive both rollers. A gripping device capable of gripping the tip of the slack portion of the bag of the can lid package formed in the portion located between the rollers over the entire length of the bag and lowering the gripped state through the gripping device. The slack in the bag, which is tensioned downwards in the closed state. And a cutter that breaks one side of the slack portion over the entire length of the bag, and the gripping device grips the tip of the slack portion by descending after the slack portion of the bag is broken by the cutter. In this state, the bag is removed by pulling the bag downward to remove the bag. 2. The roller rotation drive device reverses the rotation direction of one of the rollers located on the side broken by the cutter in synchronization with the pulling down and removal of the bag by the gripping device. The bag removing device for a can lid package according to claim 1.