JP2506395B2 - Positioning device for opening and closing cylindrical packages - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a device for determining the opening position of a cylindrical package in which a disk-shaped can lid is packed in a bag.

[Conventional technology]

Cans that are generally used for canning soft drinks and foods are
When it is a two-piece can, it is supplied as it is, and when it is supplied to a canning factory, when it is supplied to a canning factory, the can body and the bottom lid are pre-double-bonded and supplied. They are stacked and supplied as a cylindrical package.
At the canning factory, the paper bag of the cylindrical package is opened, the can lid is taken out, and the can lid is supplied to the can lid feeder during the canning process.

To open a paper bag of a cylindrical package with a can lid,
For example, as described in Japanese Utility Model Publication No. 59-18975,
Pick up the slight slack in the paper bag to make room for incision,
A cutter knife is put there and moved along the column direction (longitudinal direction) to cut open along the entire length. In this way, it is possible to surely cut open the inner can lid without damaging it.

[Problems to be solved by the invention]

As shown in FIG. 3, a paper bag 3 of a cylindrical package 1 having a can lid 2 therein has an overlapping portion 3a which is a margin for forming the bag in the longitudinal direction, and the portion 3a is Not only is the paper doubled, but it is also glued together.

On the other hand, in the above-mentioned incision, the incision position in which the cutter knife is inserted has conventionally been unsorted. Therefore, if the cutter knife enters the overlapping portion 3a, there is a problem that the paper bag cannot be cut open in a straight line in the longitudinal direction from one end to the other, or the knife is significantly damaged. In the worst case, the knife will break, and the paper bag cutting process in the integrated process will be stopped, which will affect the progress of other processes and cause production efficiency to deteriorate. Even if the knife does not break, it is worn out a lot and must be replaced frequently. Further, when the overlapping portion 3a is cut open, thread-like chips and shredded chips are generated, and the chips are caught between the cans of the can lid and carried to the next process, which causes a trouble.

The present invention has been made to solve these problems, and provides a positioning device for opening an appropriate position of a bag of a cylindrical package.

[Means for solving problems]

A slitting and positioning device for a cylindrical packaging body to which the present invention is applied to solve the above-mentioned problem, a cylindrical packaging body in which a disk-shaped can lid is stacked and packed in a bag is rotated about its cylindrical axis as a center of rotation, A positioning device for stopping at a position,
A rotating body on which the cylindrical package is placed, a rotation driving unit that rotationally drives the rotating body, and an overlapping portion of the bags along the cylindrical direction of the cylindrical package are on the outer periphery of a stationary relationship. A mark sensor that detects the mark and sends a detection signal,
A control means for receiving the detection signal from the mark sensor and stopping the rotational drive of the rotating body so that the rotation of the cylindrical packaging body stops at a position where the overlapping portion does not face the slitting cutter. There is.

[Action]

Since the device of the present invention has the above configuration, after the cylindrical package is placed on the rotating body, the rotating body is rotated by the rotation driving means. During this rotation, the detecting means detects a detection mark on the overlapping portion of the bag along the column direction of the cylindrical package or on the outer periphery in a fixed positional relationship with the overlapping portion, and transmits a detection signal. Upon receiving this detection signal, the control means stops the rotation of the rotating body when the overlapping portion of the bags of the cylindrical package comes to the position not facing the slitting cutter. When the rotation of the rotating body stops, the rotation of the cylindrical packaging body placed on the rotating body also stops. Therefore, the overlapping portion of the bags of the cylindrical package faces in a direction different from the position of the slitting cutter when sent to the bag slitting process of the next process. Therefore, the cutter does not cause damage even if the bag is cut open, and does not leave chips that hinder the next process.

〔Example〕

 Hereinafter, examples of the present invention will be described in detail.

FIG. 1 is a perspective view showing an embodiment of a slitting and positioning device for a cylindrical package to which the present invention is applied, and FIG. 2 is an embodiment of the main part of the positioning device and the next paper bag slitting process. It is a perspective view which shows the outline of.

As shown in these figures, in the apparatus, rotating bodies 6 and 7 made of rubber rolls are axially supported in parallel with each other at a slight distance, and a cylindrical package 1 can be placed in the middle thereof. These rotating bodies 6 and 8 are in contact with the drive roller 15. The middle part of the drive roller 15 is a groove,
A belt 16 is wound around the groove and a pulley 17 of the motor 5. The rotors 6 and 7 are provided with grooves 37 for improving friction.

The device includes a mark sensor 10 on the fixed frames 18 and 19.
And a rotatable cylindrical package pressing roller 20 are attached. An air cylinder 22 for moving the pressing roller 20 up and down is provided between the fixed frame 19 and the pressing roller 20. When the photoelectric tube 26 detects that the cylindrical package 1 is placed at a predetermined position on the rotating bodies 6 and 7, and sends a detection signal, the air cylinder 22 moves the pressing roller 20 to the cylindrical package 1. Lower to contact position.

As shown in FIG. 3, in the cylindrical package 1, a can lid 2 is packaged in a paper bag 3, and the bag 2 has an overlapping portion 3a. As shown in FIG. 2, a dark color portion 8 as a detection mark is provided on the side surface opposite to the overlapping portion 3a by approximately 180 °. The mark sensor 10 and the dark-colored portion 8 are in a positional relationship capable of facing each other.

In addition, as shown in FIG. 1, the photoelectric tube 26 faces the position where the cylindrical package 1 is placed in the middle of the rotating bodies 6 and 7.
Is arranged. The conveyor 28 is for conveying the cylindrical package 1 from the previous process to the positioning device. Conveyor
A swingable first gate is provided between 28 and the cylindrical package 1.
30 and a second gate 31 that can move up and down are attached. As shown in FIG. 2, an infeed pusher 33 is arranged on the extension line in the longitudinal direction of the position where the cylindrical package 1 is placed. On the opposite side is a device for the slitting process,
35 and cleavable cutter knives 12 and 13 are arranged.

The columnar package 1 placed on the conveyor 28 is conveyed toward the positioning device and stops at the first gate 30. Here, when the first gate 30 swings, the cylindrical package 1
Only one is sent to the second gate 31 side. If the photoelectric tube 26 does not detect the cylindrical package 1, the second gate 31 once descends, and the pawl of the cylindrical package 1 comes off. This time,
Since the pressing roller 20 is raised, the cylindrical package 1 is supplied between the rotating bodies 6 and 7. Here, the photoelectric tube 26 detects the cylindrical package 1.

The detection signal is used as a trigger to cause the air cylinder 22 to lower the pressing roller 20 to press the cylindrical package 1 against the rotating bodies 6 and 7, and at the same time, the motor 5 starts rotating. On the other hand, the rotation of the motor 5 is transmitted in the order of pulley 17 → belt 16 → drive roller 15 → rotating body 6 and 7, and the cylindrical packaging body 1 rotates. The dark color portion 8 which is not rotated by the rotation of the cylindrical package 1 also rotates, and the dark color portion 8 is detected by the mark sensor 10 in due course. This detection signal stops the motor 5 and also presser roller
20 is raised by an air cylinder 22. At this time, in the cylindrical package 1, the overlapping portion 3a faces substantially downward, and the pressing roller 20 is released. Next, the infeed pusher 33 is operated to push out the cylindrical package 1 in the longitudinal direction. Then, the cylindrical package 1 is sent to the device for the slitting process. When the feeding is completed, the in-feed pusher 33 returns to the position before the feeding process, waits for the supply of the next cylindrical package, and the above operation is repeated when the next cylindrical package is supplied. Photocell 26 is a cylindrical package 1.
Will not be detected, so the operation of the infeed pusher 33 is stopped.

The cylindrical package 1 sent to the slitting process picks up the paper bag 3 with the holding tool 35, and a cutter knife is left in the picked up space.
Insert 12 and 13 and cut open in the direction of the arrow. A position unrelated to the overlapping portion 3a is cut open.

FIG. 4 shows the detection of the cylindrical package 1 of the photoelectric tube 26, the detection of the dark portion 8 of the mark sensor 10, the rotation of the motor 5, and the raising and lowering operation of the air cylinder 22 in the above embodiment.
Forward movement of the infeed pusher 33, swing of the first gate 30,
The chart of each operation timing of the lowering of the second gate 31 is shown.

FIG. 5 shows a front view of the essential parts of another embodiment of the slit positioning device for a cylindrical package. In the apparatus shown in the figure, a roller 39 is attached to the upper frame 19 via a switch 42 and a spring 43. The rotating bodies 40 and 41 are not provided with any groove. Other than this, the difference from the embodiment shown in FIGS. 1 and 2 is that the mark sensor 10 is omitted. The motor 5 (see FIG. 1) rotates to rotate the rotors 40 and 41.
When is rotated, the cylindrical package 1 is rotated. Eventually, the overlapping portion 3a pushes up the roller 39, and the switch 42 is switched. From this switching, the motor 5 is stopped at a timing when the cylindrical package 1 makes a half rotation. Then, the overlapping portion 3a is substantially lower side, that is, the cutter knives 12 and 13
Face a direction unrelated to the position where the is inserted. When the apparatus of this embodiment is used, it is possible to detect the overlapping portion as a detection mark without specially attaching a detection mark to the bag of the cylindrical package 1.

It should be noted that the motor continues to rotate without rotating or stopping the motor each time to rotate or stop the rotor, and by an interrupting device (clutch) provided between the motor and the rotor,
It can also be done by transmitting or cutting the rotating force to the rotating body.

〔The invention's effect〕

As described above, by using the slit opening positioning device of the cylindrical package to which the present invention is applied, the cutter knife can open a position that is independent of the overlapping portion of the bags in the bag opening process of the next process. become. Therefore, damage to the cutter knife can be prevented, and at the same time, generation of thread-like chips and shredded chips can be suppressed. The paper bag cutting process does not stop and the entire canning process is stable. In addition, there is no need for complicated knife replacement.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a slitting and positioning device for a cylindrical package to which the present invention is applied, and FIG. 2 is an embodiment of the main part of the positioning device and the next bag opening process. FIG. 3 is a partially cutaway perspective view of the cylindrical package, FIG. 4 is an operation time chart diagram, and FIG. 5 is a front view of a main part of another embodiment of the positioning device. 1 ... Cylindrical package, 2 ... Can lid 3 ... Bag, 3a ... Overlapping part 5 ... Motor, 6.7 ... Rotator 8 ... Dark color part 10 ... Mark sensor (detection means) 12 ・ 13 …… Cutter knife 15 …… Drive roller 20 …… Pressing roller, 22 …… Air cylinder 26 …… Phototube, 28 …… Conveyor 30 …… First gate, 31 …… Second gate 33 …… Infeed Pusher 35 …… Clamping tool

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. A positioning device for rotating a cylindrical packaging body, in which a disk-shaped can lid is stacked in a bag, about its cylindrical axis as a center of rotation, and stopping it at a predetermined position. The rotary body, the rotary drive means for driving the rotary body to rotate, and the overlapping portion of the bag along the cylindrical direction of the cylindrical packaging body are in a fixed relationship with each other. And a control for stopping the rotation drive of the rotating body so that the rotation of the cylindrical package is stopped at a position where the overlapping portion does not face the slitting cutter in response to the detection signal from the mark sensor. A device for slitting and locating a cylindrical package, which comprises: