JPS58149207A - Compensator for meandering of beltlike film in automatic packer, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses an automatic packaging device or the like to automatically correct the meandering of a strip film that occurs when a tube forming device overlaps both longitudinal edges of the strip film to form a cylindrical body. This article relates to a meandering correction device for strip-shaped film, and its purpose.

Always try to ensure that the overlapping edges of the film strip are properly overlapping.

Conventionally, in various automatic packaging devices such as horizontal billow packaging machines, when a strip film is formed into a cylindrical shape and its both side edges are polymerized, the polymerization of the strip film is There was a risk that the edges would shift and the packaging would be defective.

This is because when the film strip is guided to the cylinder making device via the guide roller due to uneven thickness of the film strip or unevenness of the printed pattern, it becomes impossible to obtain uniform tension throughout the film strip. This is a phenomenon that occurs as a result, and in the past, the meandering could be corrected by making the tension of the film strip uniform by slightly adjusting the displacement of the guide roller that guides the film strip to the tube-making device through visual detection by the operator. That's what I was doing.

However, in recent years, the systemization of packaging technology has progressed.

There has been a demand for labor-saving and unmanned operation, and the need for manual labor to correct the meandering of the strip-shaped film has become a problem, and there is a strong demand for automation of this process.

The present invention monitors both side edges of a strip film that is formed into multiple tubes by a tube making device using a strip film edge detector, and detects the deviation of the overlapping end of the film due to the meandering, thereby detecting the deviation of the film on the entrance side of the tube making device. By tilting the film guide roller disposed at a required angle, the film guide roller and cylinder forming ii! By correcting the tension condition of the film between the sheets, the meandering of the strip film is automatically corrected.

This is to ensure proper polymerization.

Next, one embodiment of the present invention shown in the accompanying drawings will be described in detail.

1 1 is a strip-shaped film, 2 is a film feeding roller, 6 is a film guide roller arranged on the entrance side of the well-known tube making device 4, 5 is a film tensioning roller 5-
．． 6 is a 74 Lumseal roller. Reference numeral 7 denotes an article to be packaged, which is sequentially transferred to the cylinder making device 4 side by a feed claw 9 on a supply conveyor 8.

Reference numeral 10 denotes a support provided at an appropriate position of a packaging machine (not shown), which supports the band-shaped film 1. Film feed roller 2. It supports the cylinder making device 4 and the like.

Reference numerals 11 and 11' denote levers for appropriately supporting the film guide roller 6, which can be fixed to a predetermined position of the support body 10 so as to be able to swing freely around the support shaft 12 and can be appropriately fixed.

The levers 11, 11' are provided with slide grooves 13, 1s' as shown in Figures 2-5, and racks 14, 14' are provided in parallel with the slide grooves 15,
One rack 14 is supported by a slide metal 15.15 so as to be able to reciprocate freely, and a crank lever 16 is connected with a pin to one end of the rack 14.
The other end is connected to a crank 17, which is fastened with a set screw 18' to an output rotating shaft 18 of a small motor 26 which can be rotated forward and backward, which will be described later. The other rack 14' is fixed to the lever 11'. The film guide roller 6 has a bearing 20 on a roller shaft 19.
20' is fitted and supported so as to be rotatable multiple times. A pinion gear 21, 21' is provided on each side of the roller shaft 19.
are fixed so as to mesh with the racks 14, 14'. Further, both ends of the roller shaft 19 are connected to slide grooves 13 provided in the levers 11 and 11'.
, 13', and can be slidably moved within the slide grooves 13° and 16'. One end is fixed to one end of the roller shaft 19 by a clamp member 22 at an appropriate position on the telebar 11'. That is, as shown in FIG. 9, the clamp member 22
The vertical wall portion 2211 is fitted and attached to one end of the roller shaft 19, and the lower surface of the vertical wall portion 22b on the other side is slidably straddled over the upper surface of the lever 11', and the tightening screw 22c is attached.
It can be fixed in a predetermined position by pressing the tip of the rack 14' against the upper surface of the rack 14'.

25 is a small motor that can rotate forward and reverse.

The lever 11 is suitably fixed to the distal end position via a connecting member 24, and the crank 17 is fastened to the output rotating shaft 18 by a set screw 18'. 25 is a rotary plate provided integrally with the crank 17, and as shown in FIG.
．． 26'.

26" is formed.

27.27', 27' are detectors using phototubes or the like, and the slit grooves 26.26', 2
This is for detecting 6”.

28, 28', 29, 29'ii band-shaped film edge detector whose approximate signal is for detecting each film edge; electrically connected to. 60 is a shielding plate. 31.31' is a long size provided on the support member 24, and # detectors 27°27', 27'' are connected to the long size 31.31'.
', and the amount of correction can be determined as necessary.

Next, the effect will be explained.

The strip-shaped film 1 passes through a film feed roller 2 and a film guide roller 6, advances to the entrance side of the cylinder making device 4 at a predetermined angle of inclination, and then is shaped into a cylinder along the inner wall of the cylinder making device 4 when it is ready. The film is formed so that both side edges of the film hang down from the band-shaped film edge protruding groove 4a of the tube-making device 4 as shown in FIG. The first
As shown in the figure, the film is held and pulled out by the film pull-out rollers 5, 5', and then the film seal roller 6
, 6'K, it will be "heated".

The band-shaped film 1 is set so that it advances at a predetermined inclination angle with respect to the cylinder-making device 4 before the packaging machine or the like is operated. If the tension of the film in the horizontal direction becomes uneven due to uneven printing patterns, etc., the film may meander to one side during the tube-making process, and the overlapping of the film edges may shift and be biased to one side. Put it away. In other words, if the tension on one side of the strip film is strong and the other side loosens, the film tends to shift to the side with stronger tension, so when the tube is made, one edge protrudes excessively downward. , the other edge is pulled upward by that amount, and the protruding lengths of the overlapping edges become uneven.

In such a case, the film edge detectors 28, 28' and 29, 29' arranged at the lower part of the cylinder making device 4 detect the deviation in the protruding length of each film edge 1a', 1a'' during the progress. Detected and based on the command, the small motor 2
Turn 6 to 11 and move the rack 14 via the crank 17.
ift. When this happens, the binion gear 21' that meshes with this rotates.

The guide roller 6 is moved by displacing the roller shaft 19 in a predetermined direction.
By tilting the film, a predetermined tension is applied to the film strip 1, and the meandering progress of the film is corrected. At this time, the slit groove 26 of the rotary plate 25, which is attached to the output rotating shaft 18 of the small motor 26 with a predetermined phase, is connected to a detector 27 such as a phototube.
When this is detected, a command to stop the rotation of the small motor 26 is issued, and the small motor 26 stops its rotation. In other words, although FIG. 5(a) shows a steady state, in this state the belt-shaped film 1 is being adjusted and set to be properly formed into a cylindrical shape, but the belt-shaped film 1 is meandering in one direction. When one edge 14' of the cylindrical film 1G is detected by the strip film edge detectors 28 and 28' as shown in FIG. 7(4), a command is sent to the small motor 26. is generated, the small motor 26 is rotated in a predetermined direction, the roller shaft 19 is displaced in a predetermined direction, and the film guide roller 5 is moved as shown in FIG. 5(C).
By tilting the film strip 1 as shown in FIG. 26' is detected by the detector 27', a command to stop the rotation of the small motor 260 is issued, and the small motor 26 stops its rotation. In addition, as shown in FIG. 7 (P), the strip film 1 is
Two film edge detectors 2 placed on opposite sides
9°29', the motor 25 is rotated in the opposite direction, and the film guide roller 3 is tilted relative to the tube-making device 4 for producing an appropriate amount as shown in FIG. The meandering of the strip film 1 is corrected by applying a predetermined tension to the strip film 1.

According to the present invention, the deviation of the edge of a strip film formed into multiple tubes by a tube making device is detected by a film edge detector placed at a predetermined position near the tube making device; After this, the film guide roller was immediately tilted at the required angle to correct the tension condition of the film strip, and the meandering of the film strip was corrected to ensure proper polymerization. It is possible to prevent packaging defects due to misalignment of the edge of the strip film.

As a result, the packaging process can be automated into a system.

It has the feature that packaging work can be done quickly and efficiently.

Although the embodiments of the present invention have been described with respect to a back-stretched type in which the edges of the strip-shaped film are overlapped in a clasped shape, the present invention is not limited to this.An envelope in which the edges of the strip-shaped film are simply overlapped with each other It can also be used for Zhangshi-style items.

Further, the tilting mechanism of the film guide roller is not limited to that of this embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view showing the state of use, Fig. 2 is a front view of the main parts, Fig. 6 is an open plan view, and Fig. 4 is a rotating plate. A partially enlarged front view showing an example of the mounting positional relationship of the detector, FIGS. 5(a) to (C) are explanatory diagrams showing the tilting state of the film guide roller, and FIG. 6 shows the state of making a tube of a strip-shaped film. Perspective view, Fig. 7(a)-P)
FIG. 2 is an explanatory cross-sectional view showing the polymerized state of the film polymerized edge. FIG. 8 is a left side view of FIG. 7(a), and FIG. 9 is a partially enlarged cross-sectional view showing the clamped state of the film guide roller shaft end. DESCRIPTION OF SYMBOLS 1... Band-shaped film, 2... Film feeding roller, 6... Film guide roller, 4... Tube making device, 5... Film tension sheet roller 16... Film seal roller, 7... ...Product to be packaged, 8... Supply conveyor, 9... Feed claw, 10... Support of packaging machine, 11, 11'... Lever, 12... Support shaft, 13
゜13'...Slide groove, 14, 14'-...
rack. 15.15...Slide metal, 16...Crank lever, 17...Crank, 18...Output rotating shaft. 18'... Set screw, 19... Roller shaft, 20.2
0'...Bearing, 21.21'...Pinion gear. 22... Clamp member, 22.・・・Vertical wall part, 22
b...Vertical wall part, 22c...Tightening screw, 26...
Small motor, 24... Connecting member, 25... Rotating plate. 26, 26'...slit groove, 27.27', 27
“...Detector, 28, 28', 29, 29'
... Strip film edge detector 2♂0 ... Screening plate, 3
1.31'...Elongated hole Figure 1 Figure 2 Figure 3 tt' Figure 8 In Figure 9 Procedural amendment document Judgment date in V, 1982 Commissioner of the Japan Patent Office Mr. Kazu Wakasugi, of the case Indication Patent Application No. 20064 No. 2 of 1980, Title of Invention Device for correcting meandering of strip film in automatic packaging equipment, etc. 3 Relationship with the case of the person making the amendment Patent Applicant Address 5-7-4 Negishi, Taito-ku, Tokyo Name: Omori Machine Industry Co., Ltd. 4, Agent Address: 2-2-5 Shinbashi, Minato-ku, Tokyo Brief description of the drawing column 8, Contents of amendments (1) Page 4, line 13, “No. "Figure 2-3" is corrected to "Figure 2." (2) "General signal" on page 6, line 15 of the same book is corrected to "detection signal." (3) Delete “n,” on page 6, line 19 of the same book〇(
4) Same book, page 8, line 15 “Pinion gear-21’”
is corrected as "pinion gear-21". (5) "Detector n" in lines 2 and 3 on page 9 of the same book is corrected to "detector n' or go." (6) In the same book, page 9, line 10, ``the edge 1a''' is corrected to ``the displacement of the edge ia/''. (7) Delete “indicates” on page 11, line 17 of the same book,
Insert the correction as ``viewed from the exit side of the cylinder making device.'' (8) The drawings, Figures 1, 2, 6, and 7 shall be corrected as shown in the attached sheet. 1 Figure 1 Figure 2 υ

Claims (1)

[Claims] In an automatic packaging device equipped with a tube-making device that overlaps both edges in the longitudinal direction of a strip film to form a cylindrical body, a tube-making device is installed at a predetermined position on the film inlet side of the tube-making device, with one end serving as a fulcrum and the other end pointing in a vertical direction. A film guide roller connected to and movably supported by a reverse drive mechanism is disposed, and an edge detector of the strip-shaped film is disposed at a predetermined position near the tube-making device, and an edge detector of the strip-shaped film is detected. A film strip in an automatic packaging apparatus, characterized in that a container and the forward/reverse drive mechanism are electrically connected, and the film guide roller is tilted at a required angle in response to a detection command from the film strip edge detector. meander correction device.