JPS6348498Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a packaging device that manually pulls out a film from a film roll placed on a placement roller.

(Prior Art) Conventionally, in a packaging device of this type that manually pulls out a film to package a packaged item, a film roll with a film winding length of 500 m and a weight of 3 kg is used. In such a conventional structure, a constant braking force is always applied to the rotating part of the loading roller, and when a predetermined length of film is pulled out from the film roll, the film roll continues to rotate due to inertia. prevent that,
This prevents the film pulled out from the film roll from becoming sagging or getting tangled with the placement roller or the like after being pulled out.

(Problem to be solved by the invention) Nowadays, long film rolls with a film winding length of about twice the conventional length, for example, 1000 m, are available, but such long film rolls are The weight is about twice that of the conventional one (about 6 kg), and the inertia is large. Therefore, in the conventional structure, the braking force that is constantly applied to the placing roller needs to be about twice as much. That is, 500m film roll (weight 3
To pull out a film from a 1000 m film roll (weight 6 kg), the pulling force was 1 to 1.5 kg.
Kg) requires 2 to 3 Kg, and there is a problem in that the pulling force becomes large and the operability deteriorates.

In addition, if a long film roll of, for example, 1,000 m is used with the conventional structure and the braking force is unchanged, the pulling force will be small, but the pulling speed must be lowered, and the packaging time will be reduced. The disadvantage is that it takes a long time and the number of packages per unit time is significantly reduced.

The present invention was developed in view of the above points, and its purpose is to completely release the brake on the film roll when the film is pulled out, and apply brakes to the film roll when the film is completely pulled out. To provide a packaging device which has a small drawing force and is excellent in operability even when using a film roll with a large film roll, and which does not reduce the drawing speed and the number of packages to be packaged.

[Structure of the invention] (Means for solving the problem) To summarize the invention, there is provided a lever device in which one end of the lever is slidably supported on the machine frame and a rotatable roller is accommodated in the other end. The roller of this lever device is brought into contact with the middle of the film that is pulled out from the film roll placed on the mounting roller and reaches the pull-out position, and is moved in one direction, which is the direction in which the slack in the middle of the film is accommodated. At the same time, when the loading roller is always kept in a braked state and a pulling force is applied to the film by manual operation at the film pulling position, the lever device is swung in the other direction as the film is pulled out. A braking device is provided to release the brake on the loading roller, and when the film is pulled out, the brake on the loading roller is released, and after the film has been pulled out a predetermined length, the loading force is released from the film. The film roll is characterized in that it puts the placing roller in a braking state to stop the subsequent rotation of the film roll.

(Function) According to the above-mentioned means, since the brake on the placing roller is released when the film is pulled out from the pull-out position, the film can be pulled out with a small pulling force, reducing operator fatigue. Since the loading roller is braked immediately after finishing the process, even if the film is pulled out at a high speed, the film roller will not rotate due to inertia and the film will not sag, and therefore the packaging speed is also fast. can.

(Example) An example of the present invention will be described below with reference to the drawings. 1 is a frame-shaped main body which is a machine frame;
A pair of front and rear loading rollers 2 and 3 are rotatably disposed at the rear. A film roll 5 made of a film 4 wound around a winding frame 5a is placed on the placing rollers 2 and 3. Reference numeral 6 denotes a lid plate which also serves as a work plate and is disposed on the upper surface of the approximately middle portion of the main body 1;
A base plate 7 for packaging work is provided on the top surface of the film so as to be movable back and forth, and a protrusion 8 made of a metal plate for guiding the film 4 is provided on the front edge. . Reference numeral 9 denotes a base plate for welding work arranged at the front part of the main body 1, and an adhesive hot plate 10 is mounted on the upper surface of this base plate.
is provided, and a panel plate portion 11 is formed at the rear end of the base plate 9. Reference numeral 12 denotes a holder made of a metal plate that is non-slip with respect to the film 4, and is positioned between the protrusion 8 and the base plate 9 in the main body 1, and is attached to the main body 1 through a shaft 12a in the direction of arrow A. It is pivotably supported to be rotatable in the direction and in the opposite direction of arrow A. A front holding part 13 and a rear holding part 14 each having a flat upper surface extend from the front and rear parts of the holding body 12. Further, a film guide 15 that is slippery with respect to the film 4 is attached to the rear surface of the rear holding portion 14 of the holding body 12. A coil spring 16 is stretched between the holder 12 and the main body 1, and the holder 12 is always urged to rotate in the direction of arrow A. 17 is located inside the front holding part 13 and the main body 1
An opening 13a facing the heat cutter 17 is provided on the upper surface of the front holding portion 13. Reference numerals 18 and 18 designate roller levers whose intermediate portions are pivotally mounted on the left and right side plates of the main body 1. A pressure roller 19 is rotatably installed at one end of the roller lever, and the pressure roller 19 is always connected to the arrow at the other end. A spring 20 is tensioned to bias the rotation in direction B (upward). Reference numeral 21 denotes a pull-out roller rotatably provided at a portion facing the film guide 15. The pull-out roller 21 and the film guide 15 constitute a pull-out portion 22 as a film pull-out position. In FIGS. 2 to 4, 23 is a guide roller located at a lower level than the loading roller 3 and rotatably supported on the main body 1, and 24 is a guide roller rotatably supported on the upper part of the main body 1. . 25 is a lever, one end of which is connected to the main body 1 by a pin 26.
A roller 27 is rotatably attached to the other end so as to be located between the guide roller 24 and the pull-out roller 21.
The film 4 is then moved from the film roller 5 to the guide rollers 23 and 2 as shown in FIGS.
4, it is passed around the roller 27 and the pull-out roller 21 in order and led out to the lead-out section 22. 28 is a spring installed between the lever 25 and the main body 1;
As a result, the lever 25 is urged in one direction, ie, in the direction of arrow C, and the roller 27 comes into contact with the film 4 so as to tension the film 4, thereby eliminating slack in the film 4. The lever 25, roller 27, and spring 28 constitute a lever device 29. A brake holding plate 30 is slidably attached to one end of the lever 25, and one end protruding from the end of the lever 25 is bent obliquely to form an operating portion 30a. 31 is bolt 3
2. An adjustment device consisting of a thumbscrew 33 and a spring 34, which is located between a bent portion 25a formed at one end of the lever 25 and a bent portion 30b formed at the other end of the brake holding plate 30. It is installed,
The length of the brake presser plate 30 protruding from one end of the lever 25 can be adjusted by threading the thumbscrew 33 back and forth. A brake plate 35 faces the end surface of the mounting roller 3 and has one end absorbed in the main body 1, and the other end is bent diagonally to form a passive part 35a, which serves as an actuating part of the brake holding plate 30. 3
It is brought into contact with 0a. This brake plate 35
is an arrow D that always moves away from the end surface of the loading roller 3.
When the lever device 29 is urged in the direction of arrow C as shown by the solid line in FIG. The brake plate 35 is displaced in the opposite direction of the arrow D, and the side surface of the brake plate 35 is pressed against the end surface of the mounting roller 3 .
is in a braking state. And this brake plate 35
The brake holding plate 30 and the adjusting device 31 constitute a braking device 36.

Next, the operation of the above configuration will be explained. As shown by the solid line in FIG. 3, the case where the drawing force P does not act on the film 4 in the drawing section 22 will be explained.
The lever device 29 is urged in the direction of arrow C by the elastic force of the spring 28, and the roller 27 is moved toward the film 4.
It is located at the bottom of the main body 1 in contact with. As a result, the actuating part 30a of the brake holding plate 30 presses the passive part 35a of the brake plate 35 as shown in FIG. The mounting roller 3 is in a braking state and the film roll 5 does not rotate. From this state, when the film 4 in the lead-out part 22 is peeled off from the front holding part 13 and the rear holding part 14 and the pulling force P is applied, the lever device 29 moves in the direction opposite to the arrow C as shown by the two-dot chain line in FIG. Correspondingly, the actuating portion 30a of the brake holding plate 30 also rotates to the fourth position.
As shown by the two-dot chain line in the figure, the brake plate 35 is separated from the brake plate 35, and the brake plate 35 is displaced in the direction of arrow D and separated from the end surface of the mounting roller 3.
is released from the braking state and therefore the film roll 5
rotates on the mounting rollers 2 and 3, and the film 4 is pulled out. In FIG. 5, (a) when packaging the article A, first place the tray B containing the article A on the base plate 7, and from this state, pinch the drawer end of the film 4 in the lead-out section 22. Hold the film 4 and apply a pulling force P to the film 4 so as to pull it upward and slightly toward you as shown in FIG. 5a. Then, as mentioned above, the lever device 2
9 is rotated in the opposite direction of arrow C, and the loading roller 3 is released from the braking state, so that the film roll 5
The mounting rollers 2 and 3 rotate according to the pulling force of the film 4, and the film 4 is pulled out to a predetermined length.
When the pulling out of the film 4 is completed and the pulling force P is released from the film 4, the lever device 29 is rotated in the direction of arrow C by the elastic force of the spring 28, and the braking device 36 is activated to be in a braking state and the loading is completed. The placing roller 3 and film roller 5 stop.

(b) In this stopped state, wrap the film 4 as shown in FIG. is moved in the direction of arrow V as shown in FIG.

(d) Next, move the tray B in the direction of arrow F as shown in FIG. When the pressure roller 19 is pressed by the lap portion as shown in FIG. 5e, the film 4 is cut by the heat cutter 17.

After that, as shown in FIG. 6, both ears 4a, 4a of the film 4 are rotated in the direction of arrow G (toward the bottom of the tray B), and the film 4 at the bottom of the tray B is attached to the adhesive hot plate 10. Weld.

By repeating the operations a to e above, trays B containing articles A can be wrapped one after another.

According to the above embodiment, when the pulling force P is applied to the film 4, the lever device 29 is swung in the opposite direction of the arrow C, the brake plate 35 is separated from the end surface of the loading roller 3, and the brake device 36 is activated. Since the braking of the loading roller 3 is released in the open state, the loading rollers 2, 3 and eventually the film roll 5 rotate smoothly and the film 4 can be easily pulled out. In other words, in the conventional structure, a constant braking force is always applied to the loading roller, and when a long film roll is placed, the braking force that is constantly applied is large, and the weight of the film roll is also large. However, with the above configuration, the brake device 36 releases when the film 4 is pulled out, so even if a long and heavy film roll of 1000 m is used, the pulling force can be maintained. For example, the weight can be reduced to 1 kg or less, which greatly reduces the pulling force and greatly improves operability.

Further, as soon as the pulling force P is released from the film 4, the lever device 29 is returned in the direction of arrow C by the elastic force of the spring 28, the brake device 36 is activated, and the brake plate 35 is attached to the end surface of the loading roller 3.
Since the loading roller 3 is stopped and the film roll 5 is also stopped, the film roll 5 does not continue to rotate due to inertia, and the film 4 is moved from the film roll 5 to the guide roller 23, 24. It is possible to prevent the occurrence of slack in the path from the lever device 29 to the lead-out portion 22 via the roller 27 and to prevent it from getting entangled with the placement rollers 2 and 3, and furthermore, the drawing speed of the ilm 4 can be particularly slowed down. Since packaging can be carried out at the normal speed of withdrawal without the need for additional steps, a decrease in the number of packages per unit time can be prevented.

[Effects of the invention] As is clear from the above explanation, the invention provides a lever device in which one end of the lever is swingably supported on the machine frame and a rotatable roller is attached to the other end. Bringing the roller of the lever device into contact with the film that has been pulled out from the film roll placed on the placement roller and reaching the pull-out position, and biasing it in one direction, which is the direction that takes up the slack in the middle of the film; Normally, the loading roller is held in a braked state, and when a pulling force is applied to the film at the film pull-out position, the lever device is swung in the other direction as the film is pulled out, and the brake of the loading roller is released. Since a braking device is provided, even when long and heavy film rolls are used, the pulling force can be reduced and operability is excellent, and the pulling speed does not decrease and the number of packages can be prevented from decreasing. This effect is achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is an enlarged longitudinal sectional side view, Fig. 3 is an enlarged longitudinal sectional side view of the brake mechanism, and Fig. 4 is an enlarged longitudinal sectional view of the brake mechanism. 5A to 5E are enlarged longitudinal sectional side views of essential parts for explaining the packaging procedure, and FIG. 6 is a perspective view of the article in the middle of packaging. In the drawing, 1 is the main body (machine frame), 3 is the mounting roller,
4 is a film, 5 is a film roll, 22 is a lead-out part (drawing position), 25 is a lever, 27 is a roller,
29 is a lever device, and 36 is a braking device.

Claims (1)

[Scope of utility model registration request] A loading roller on which a film roll around which a packaging film is wound is placed and rotates in response to the rotation of the film roll; and one end of a lever is swingably supported on a machine frame and is pulled out from the film roll. Attaching to the other end is a roller that rotates in contact with the film midway through the film until it reaches the pull-out position, and the roller always contacts the film and is biased in one direction, which is the direction in which the film takes up the slack in the middle of the film. When the film is manually pulled out from the pull-out position, the lever device is held in a braked state and the lever device is moved in the other direction as the film is pulled out. A packaging device comprising: a braking device that is swung to release the braking of the placement roller, and the packaging device is configured to manually wrap the packaged article using the film pulled out from the pull-out position. .