JPS6140650Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a sheet film fixed length feeding device capable of feeding a fixed length of packaging film used in, for example, an automatic packaging machine.

[Conventional technology]

In automatic packaging machines that heat-seal and package packaging films, the sheet film is normally pulled out and fed by the rotational force of a vertical roll sealer, but when the roll film is large, the tension is applied. On the other hand, as the winding of the roll film becomes smaller, the tension increases.Therefore, there is a problem in that the amount of film feed by the vertical roll sealer cannot be kept constant due to the influence of the size of the tension. In addition, among heat seals, especially the horizontal seal, it is necessary to seal in accordance with the printing of the film, and if the film is not fed by a fixed length as described above, the horizontal seal will be performed at the wrong position. By adjusting the rotational speed of the vertical roll sealer and by applying appropriate brakes to the film feed using a brake device that combines a brake and a detector that reads marks printed on the film, the amount of film feed can be adjusted to a fixed length. It had become

[Problem that the invention attempts to solve]

However, the solution for adjusting the rotational speed of the vertical roll sealer is technically difficult because there is a difference in the rotational speed of the vertical and horizontal roll sealers, that is, the sealing speed, and furthermore, the structure of the sealer drive unit is complicated. In addition, when the heat sealer has a single roll structure in which a horizontal sealer and a vertical sealer are integrated, there is a problem that it is structurally impossible to adjust the speed of only the vertical sealer. In addition, the solution using the brake device described above has the drawback that the mechanical and electrical structure for applying the brake appropriately is complicated, and the film is stretched by the brake, resulting in conspicuous defective products. It was hot.

Therefore, the technical problem of the present invention is to be able to accurately feed a sheet film by a fixed length using a device with a relatively simple structure, and to freely and accurately adjust the feed amount. The goal is to make you feel like you.

[Means for solving problems]

The measures taken in the present invention to solve the above technical problems are as follows.

(1) The drive roll, which contacts and rotates the interlocking roll and sends the sheet film between it and the interlocking roll, can be rotated intermittently by a one-way clutch that intermittently transmits the rotational force of the motor. To compose.

(2) The above-mentioned interlocking roll is attached to a rotatable swinging arm, and a spring is attached to this swinging arm to press the above-mentioned interlocking roll against the drive roll 1 side.

(3) On one side edge of the swinging arm, there is a disconnection that rotates in conjunction with the motor as a drive source, and that pushes the swinging arm during rotation to separate the linked roll from the drive roll. To press the cam.

(4) The above separation cam shall be constructed so that its rotation can be adjusted independently by operating the handle.

However, here, the one-way clutch is
It is pushed by a cam rotated by a motor and rotates in one direction while accumulating rotational force, and when the pressure of the cam is released, the accumulated rotational force engages the clutch and rotates in the other direction. Refers to a clutch mechanism that rotates to rotate the drive roll intermittently.

[Effect]

The means consisting of the elements (1) to (4) above operate as follows.

According to the element (1) above, when the drive roll rotates under the rotational force of the motor by the one-way clutch, the sheet film can be fed between the interlocking roll and the sheet film. is fed at regular intervals by a simple device consisting of a pair of rolls and a one-way clutch.

According to the factor (2) above, the interlocking roll attached to the swinging arm is pressed against the drive roll side by the spring, so when the drive roll rotates, it always interlocks and feeds the sheet film accurately. Can be done.

According to the factor (3) above, when the separation cam pushes the swing arm and separates the interlocking roll from the drive roll, the feeding of the sheet film is stopped. The sheet film is fed only when the drive roll is rotated by 16 and the separation cam is not separating the interlocking rolls.

According to the above element (4), the separation cam can be rotated independently by the handle to adjust the timing of pushing the swinging arm, that is, the timing of separating the interlocking roll from the drive roll.
Therefore, if the separation timing is adjusted later, the sheet film feed amount can be lengthened, and if it is adjusted earlier, the sheet film feed amount can be adjusted to be shorter, making it possible to arbitrarily adjust the feed amount.

As described above, the above-mentioned technical problem can be solved by the above-mentioned means, and the problems of the conventional technology can be solved.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the sheet film fixed length feeding device according to the present invention will be described in detail below with reference to the accompanying drawings.

In the figure, 1 is a drive shaft 2 that performs intermittent drive rotation.
3 is a drive roll attached to the drive roll 1, and 3 indicates an interlocking roll provided opposite to the drive roll 1. This interlocking roll 3 is rotatably attached via a shaft 4 to a swinging arm 6 which rotates from side to side in the drawing with a mounting shaft 5 attached to the upper end as a fulcrum. Reference numeral 7 denotes a spring whose one end is attached to the lower end attachment part 6a of the swinging arm 6 and the other end is attached to a suitable fixing member 8. It is constantly rotated to the right in the drawing about the mounting shaft 5 as a fulcrum, and presses the surface of the interlocking roll 3 against the drive roll 1 side. Therefore, when the drive roll 1 is rotated counterclockwise in the drawing, the interlocking roll 3
rotates clockwise in the drawing, and both rolls 1 and 3
The sheet film A interposed in between as shown in the figure can be sent downward by the amount that the drive roll 1 rotates. Note that A' indicates a sheet roll on which the sheet film A is wound.

Next, reference numeral 9 denotes a separation cam provided near the lower right side of the swing arm 6 in the drawing, and this is attached to the cam shaft 10. The separation cam 9 rotated by the camshaft 10 intermittently pushes the swinging arm 6 to the left in the drawing against the pulling force of the spring 7, as shown in FIG. is interlocking roll 3
The feeding of the sheet film A can be stopped midway by separating it from the drive roll 1. The intermittent separation movement of the interlocking roll 3 by the separation cam 9 is performed during the intermittent drive rotation of the drive roll 1, and this separation timing is configured to be adjustable, so that the amount of feed of the sheet film A is can be adjusted freely. That is, in the present invention, if the timing at which the drive roll 1 is separated by the separation cam 9 is set early, the feed amount of the sheet film A sent by both rolls 1 and 3 becomes short, and vice versa. The later the disconnection timing is, the more
The feed length of the sheet film A is long, and the feed amount when no separation is performed is max. roll 1
The amount of feed of the sheet film A can be freely adjusted within the range of the amount of one feed rotation.

FIG. 4 is a time chart showing the feeding operation of the drive roll 1 and the state of the separation operation of the separation cam 9 in relation to each other. If b is the time during which the sheet film A is not fed due to the separation of the separation cam 9, the feed amount T of the sheet film A actually fed by both rolls 1 and 3 is expressed as a-b=
Therefore, the feed amount T can be increased or decreased by increasing or decreasing the time b.

Next, a mechanism for intermittently feeding the drive roll 1 and a timing mechanism for adjusting the pressing timing of the separation cam 9 will be explained based on the description in FIG.

In the figure, 11 is a motor serving as a driving source, and 12 is a reduction gear that basically transmits the rotation of the motor 11 to the rotating main shaft 13. Reference numeral 14 denotes a cam attached to the upper end of the rotating main shaft 13, and a pusher 16a of a one-way clutch 16 attached to the driven shaft 15 protrudes within the rotation range of the cam 14. When the pusher 16a is pressed by the cam 14, the one-way clutch 16 freely rotates in the clockwise direction in the drawing with respect to the driven shaft 15 and accumulates rotational force.
4 is released, the accumulated rotational force causes the clutch to rotate counterclockwise in the drawing, and at the time of this reverse rotation, the clutch engages and the driven shaft 15 and the large-diameter gear attached to this shaft 15 are rotated. 17 can be rotated counterclockwise in the drawing.

Reference numeral 18 denotes a small-diameter gear that meshes with the large-diameter gear 17, and this gear 18 is attached to the drive shaft 2 to which the drive roll 1 is attached, so that the drive roll 1 is rotated intermittently due to the above-described configuration. The sheet film A can be fed intermittently. 16b
19 is a stopper attached to the one-way clutch 16, and 19 is an adjusting screw rod that controls the rotation amount of the one-way clutch 16 by stopping the reverse rotation of the stopper 16b midway through, and adjusts the feed rotation amount of the drive roll 1. show. The outer end adjusting portion 19a of the screw rod 19 projects outside the body case 20, and therefore the feed amount of the drive roll 1 can be easily adjusted from the outside of the body case 20.

Further, reference numeral 21 denotes a drive bevel gear attached to the middle of the rotary hand shaft 13, and this gear 21 has an interlocking rotary shaft 2.
The driven bevel gear 23 attached to the rotating shaft 2 meshes with the driven bevel gear 23, and can transmit the rotation of the rotating main shaft 13 to the interlocking rotating shaft 22. A chain 26 is connected between the sprocket 24 attached to the interlocking rotating shaft 22 and the interlocking sprocket 25a attached to one side of a known differential gear device 25 which combines four bevel gears as shown. and the driven sprocket 25b attached to the other side of the differential gear device 25 and the separation cam 9.
A chain 28 is also stretched between the driven sprocket 27 attached to the camshaft 10 of the motor 1.
The rotational force of the rotating shaft 13 rotated by the rotating shaft 13 is transmitted to the camshaft 10 via the interlocking rotating shaft 22 and the differential gear device 25, and can rotate the separation cam 9. 29 is an operating shaft attached to the differential gear device 25, and the operating shaft 29 is controlled by the handle 30.
When the driven sprocket 25b is rotated, the driven sprocket 25b
Only the separating cam 9 is rotated in the forward and reverse directions.
can be rotated in conjunction with each other to adjust the pushing timing of the separation cam 9 relative to the swing arm 6.

Since the present invention has the above-described configuration, the sheet film A can be intermittently fed between the drive roll 1 and the interlocking roll 3, and the timing at which the interlocking roll 3 is separated by the separation cam 9 can be controlled by the handle 30. Since the feed amount of the sheet film A can be freely adjusted within the range of max by appropriately adjusting the amount by operation, the sheet film A of any length can be repeatedly and intermittently fed.

〔effect〕

Therefore, the sheet film fixed length feeding device according to the present invention is suitable for implementation in an automatic packaging machine that heat-seals the sheet film while intermittently feeding the sheet film for filling with filler material and cutting with a cutter. If an error occurs in the amount of film feed due to the magnitude of the tension applied to the film, the error can be immediately corrected by adjusting the operating timing of the separation cam and increasing or decreasing the amount of feed. It is possible to place the horizontal sticker in the correct position according to printing, etc., and
The drive roll is intermittently rotated correctly by a one-way clutch to accurately feed the sheet film, while the cam that operates the one-way clutch and the above-mentioned separation cam are rotated in conjunction with each other by the same motor. Because of this structure, various practical effects can be achieved, such as simplifying the overall structure and reducing manufacturing costs, making maintenance easier, and making it easier to adjust the timing of both cams. It is especially suitable for use in the film feeding section of an automatic packaging machine using a roll sealer with a single roll structure in which the rotational speed of the vertical sealer cannot be adjusted.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a block diagram explaining the state when the sheet film is being fed, Figure 2 is a block diagram showing the state when the feed is stopped, and Figure 3 is an example of the operating mechanism that operates the drive roll and separation cam. FIG. 4 is a time chart. 1 is a drive roll, 2 is a drive shaft, 3 is an interlocking roll, 6 is a swing arm, 7 is a spring, 9 is a separation cam, 11 is a motor, 14 is a cam, 16 is a one-way clutch, 30 is a handle, A is a seat film.

Claims (1)

[Scope of utility model registration request] In a sheet film feeding device that feeds the sheet film A between a drive roll 1 that performs drive rotation and an interlocking roll 3 that interlocks and rotates in contact with the drive roll 1, the drive roll 1 is moved by a motor 11. The above-mentioned interlocking roll 3 is attached to a freely rotatable swinging arm 6, and the above-mentioned interlocking roll 3 is attached to a swinging arm 6 that can freely rotate. A spring 7 is attached to press the roll 3 against the drive roll 1 side, and a spring 7 is attached to one side edge of the swing arm 6. The swing arm 6 rotates in conjunction with the motor 11 as a drive source, and when rotating, the swing arm 6 to press the separation cam 9 that separates the interlocking roll 3 from the drive roll 1, and the separation cam 9 is configured to be independently rotationally adjustable by operating the handle 30. A sheet film fixed length feeding device featuring: