JPH0438662B2 - - Google Patents

Description

Detailed Description of the Invention Object of the Invention (Field of Industrial Application) The present invention provides a support device for supporting a film take-up roll in a packaging machine and guiding the film pulled out from the roll to a film transport device while applying tension. It is related to.

(Prior art and problems to be solved by the invention) This type of support device is described, for example, in the specification and drawings of Japanese Patent Application No. 60-234986 (Japanese Unexamined Patent Publication No. 62-96257). .

In this support device, when setting the film on the film transport device, a swingable tension lever is moved upward to suspend the film, and in this state, the brake is released to allow the film take-up roll to rotate. This makes it easy to pull out the film.

If the film transport device is inadvertently driven while the tension lever is in the film set working position, the film winding roll will idle due to the film transport force, making it impossible to apply sufficient tension to the film. If the drive is not carried out, it may interfere with the film transport, and it is very dangerous if the drive is in progress during the film setting operation.

Therefore, a switch is provided in conjunction with the film take-up roll support device to prevent the film transport device from being driven when the tension lever is in the film setting working position.
The present invention prevents the film take-up roll from spinning idly and improves safety during film setting operations.

Structure of the Invention (Means for Solving Problems) That is, as shown in the drawings of later embodiments, the present invention comprises a rotatable support shaft 3 on which a film take-up roll 4 is mounted, and a support shaft 3 that is rotatable in the vertical direction. Tension levers 11, 12, 14, 15 supported in a swingable manner;
Film guide rollers 13, 16 provided on the levers 11, 12, 14, 15, a brake 7 connected to the support shaft 3, and the tension lever 1
When the tension levers 1, 12, 14, and 15 are in the lowest position, they prevent the rotation of the support shaft 3, and when the tension levers 11, 12, 14, and 15 move upward from this position, they prevent the rotation of the support shaft 3. brake control means 34, 35 for operating this brake 7 in a manner that allows
lever holding means 24, 25, 30, 31, 32, 33 for holding the tension levers 11, 12, 14, 15 at a film set working position where the tension levers 11, 12, 14, 15 have been moved upward by a certain level;
a switch 39 that operates to drive or stop the film transport device 41; and the tension lever 1.
1, 12, 14, and 15 are in the film set working position, switch control means 36, 37 are provided for operating this switch 39 to stop the film conveying device 41.

(Function) To set the film F, as shown in FIG.
Tension lever 11 by 31, 32, 33,
12, 14, and 15 are moved upward by a certain amount or more and held at the film set working position. In this state, the brake 7 is released by the brake control means 34, 35, and the support shaft 3 becomes rotatable. Then, the film F is pulled out from the take-up roll 4 and set on the film transport device 41.

During this film setting operation, the film take-up roll 4 becomes rotatable, making it easier to pull out the film F. However, the switch control means 36, 37
As a result, the switch 39 operates and the film transport device 4
1 is never driven.

After setting the film F, as shown in FIG. , 16 side. This applies tension to the film F, and the tension levers 11, 12, 14, and 15 are slightly moved upward. This upward movement brake control means 34, 3
5, the brake 7 is released and the film take-up roll 4 becomes rotatable. Thereafter, the film F is sequentially pulled out from the take-up roll 4. Also, when the film transport device 41 stops, the tension on the film F disappears, and the tension levers 11, 12,
14 and 15 are lowered to the lowest position again. The brake 7 is applied by the brake control means 34 and 35 during downward movement, and the take-up roll 4 becomes unrotatable and does not idle.

(Example) An example of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, a support shaft 3 is rotatably supported on the lower end of the rear support frame 2b of the pair of front and rear support frames 2a and 2b, and a film winding is mounted on the support shaft 3. A take-up roll 4 is attached. A mounting member 5 is fitted into the central cylindrical shaft portion of the roll 4 and fixed to the support shaft 3 with a screw 6. As a result, the winding roll 4
is fixed to the support shaft 3 by a mounting member 5 so as to be non-rotatable and non-movable in the axial direction. As shown in FIG. 2, an electromagnetic brake 7 is connected to the support shaft 3 on the outer surface of the rear support frame 2b, and controls rotation and stopping of the support shaft 3.

In FIG. 1, a pair of film guide rollers 8 and 9 are located on the upper right side of the support shaft 3 on both the front and rear frames 2a,
It is rotatably installed between 2b. A shaft 10 is installed between the frames 2a and 2b on the left side of the support shaft 3, and support levers 11 and 12 are supported near the inner surfaces of the frames 2a and 2b so as to be able to swing vertically relative to the shaft 10. has been done. The tips of both levers 11 and 12 pass between the support shaft 3 and guide rollers 8 and 9,
A film guide roller 13 is rotatably installed between both ends. Both support levers 11, 12
Auxiliary levers 14 and 15 are supported rotatably in the vertical direction around a shaft pin 17, and both auxiliary levers 1
A film guide roller 1 is placed between the tips of 4 and 15.
6 is rotatably installed. Both auxiliary levers 1
A concave hole 14a (the lever 15 side is not shown) is formed at the base end of the support lever 11,
A pin 11a (only the support lever 11 side is shown) protruding from the support lever 12 is disposed within the recess 14a, thereby restricting the swing range of the auxiliary levers 14 and 15. Arms 18, 1 are provided at the ends of both support levers 11, 12 between the guide rollers 13, 16.
9 protrudes downward, and tension coil springs 20 and 21 are hung between the lower end sides of the arms 18 and 19 and the roller shaft 16a of the guide roller 16. Note that the support levers 11 and 12 and the auxiliary levers 14 and 15 constitute a tension lever.

Mounting brackets 22 and 2 are attached to both support levers 11 and 12 between the guide roller 13 and the arms 18 and 19.
3 is fixed, and the chain 2 is attached to both metal fittings 22 and 23.
4 and 25 (hanging members) are connected at one end.
Both support frames 2 near the guide roller 9
Support metal fittings 26 and 27 are fixed on the inner surfaces of a and 2b, and a mounting metal fitting 28 is rotatably attached to one of the support metal fittings 26 with a bolt 30, and a chain is attached to this metal fitting 28. The other end of 24 is connected. A rod 36 (movable member) is supported on the other supporting metal fitting 27 so as to be movable in the vertical direction as shown in FIG. 29 has bolt 3 on the other end of chain 25.
1.

A stopper pin 36a is provided on the rod 36 to protrude above the support fitting 27, and a compression coil spring 37 is wound between the stopper pin 36a and the support fitting 27. A bracket 38 is fixed to the support fitting 27 adjacent to this rod 36, and a limit switch 3 is attached to this bracket 38.
9 is installed. This limit switch 3
As shown in FIG. 3, the operating lever 39a of 9 is pushed when the rod 36 moves upward by a certain amount due to the elastic force of the compression coil spring 37, and the limit switch 39 is activated.
is turned ON, and the rod 36 is turned on as shown in Figure 5.
When the lever moves downward against the elastic force of the compression coil spring 37, it separates from the operating lever 39a and the limit switch 39 is turned off. A stepped portion 38a is formed in the bracket 38, and when the rod 36 moves downward as shown in FIG. 5, the stopper pin 36a is locked to this stepped portion 38a, preventing the rod 36 from moving further downward. ing. Note that the rod 36 and the compression coil spring 37
These constitute a switch control means.

Latching rings 32, 33 (latching portions) are attached to the intermediate portions of the chains 24, 25, so that they can be latched to the bolts 30, 31 (latching portions) as shown in FIG. ing. At the time of this latching, the support levers 11 and 12 move upward and are suspended, and their weight tensions the chains 24 and 25, causing the rod 36 to resist the elastic force of the compression coil spring 37, as shown in FIG. The limit switch 39 is turned off as described above. When the retaining rings 32 and 33 are removed, the support levers 11 and 12 are lowered to the lowest position, and the rod 36 is moved upward by the elastic force of the compression coil spring 37 as shown in FIG. The limit switch 39 is now turned on.

A cam plate 34 is attached to the base end of one of the support levers 11, and on the swinging trajectory of the cam plate 34, the electromagnetic brake 7 is turned on and off on the support frame 2b as the support lever 11 swings. A limit switch 35 is attached. That is, the limit switch 35 is turned off when the support levers 11 and 12 are at the lowest position as shown in FIG. but
It's starting to turn on. When the limit switch 35 is OFF, the electromagnetic brake 7 operates to prevent the rotation of the support shaft 3, and when the limit switch 35 is ON, the electromagnetic brake 7 is released to allow the rotation of the support shaft 3. ing.
Note that the chains 24, 25 and the bolts 30, 3
1 and the latching rings 32, 33 constitute lever holding means for holding the support levers 11, 12 in this film setting working position, and the cam plate 3
4 and the limit switch 35 constitute a brake control means.

The film F pulled out from the take-up roll 4 is moved by guide rollers 8, 13, 9,
16, and is set at a film supply port P of a film transport device 41 (only a portion of which is shown and details thereof are omitted). The drive motor (not shown) of this film transport device 41 can be driven when the limit switch 39 is ON in the state shown in FIG. 1, and is not driven when the limit switch 39 is OFF in the state shown in FIG. It's becoming like that.

Now, in order to set the film F after the take-up roll 4 has been attached to the film take-up roll support device 1 constructed as described above, as shown in FIG. , 33 are hooked onto bolts 30, 31, thereby moving both support levers 11, 12 upward by a certain amount or more and holding them at the film set working position. In this state, the limit switch 35 is turned on, the electromagnetic brake 7 is released, and the support shaft 3 becomes rotatable. Then, the supply port P of the film transport device 41 is opened, and the film F is pulled out from the take-up roll 4 and set in the supply port P.

During this film setting operation, the film take-up roll 4 becomes rotatable, making it easier to pull out the film F. However, limit switch 39
Since it is OFF, the film transport device 41
is never driven. Therefore, it is impossible for the film take-up roll 4 to spin idly, and it is very safe.

After setting the film F, as shown in FIG. 1, when the support levers 11 and 12 are returned to the lowest position and the film transport device 41 is driven, the film F is pulled up from the guide roller 16 side by the transport force. This applies tension to the film F, and both support levers 11 and 12 are slightly moved upward. This upward movement turns on the limit switch 35.
, and the take-up roll 4 becomes rotatable. From then on,
Films F are sequentially pulled out from the take-up roll 4. If a tension fluctuation occurs in the film F during this conveyance, this tension fluctuation is quickly absorbed by the action of the tension coil springs 20, 21 of the auxiliary levers 14, 15, and the conveyance condition of the film F is maintained in good condition. Also, when the film transport device 41 stops, the tension on the film F disappears, and the support lever 1
1 and 12 are lowered to the lowest position again. This downward movement turns off the limit switch 35, and the take-up roll 4 becomes unable to rotate. Therefore, the take-up roll 4 is prevented from spinning idly.

Effects of the Invention In short, according to the present invention, the tension lever 1
1, 12, 14, and 15 are in the film set working position, the film transport device 41 is never driven, so the film take-up roll 4 cannot spin idly, and is very safe.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing the film take-up roll support device according to the present embodiment in a completed state of film setting, FIG. 2 is a schematic side view, and FIG.
4 is a schematic sectional view showing the state of the supporting device during film setting operation, and FIG. 5 is a view corresponding to FIG. 3 in the state shown in FIG. 4. Support device for film take-up roll...1, Support shaft...
...3, Film take-up roll...4, Electromagnetic brake...7, Support lever...11, 12, Film guide roller...13, Auxiliary lever...14,1
5. Film guide roller...16. Chain...
...24, 25, Bolts...30, 31, Locking ring...32, 33, Cam plate...34, Limit switch...35, Rod...36, Compression coil spring...37, Limit switch...39, Film Conveyance device...41.

Claims (1)

[Scope of Claims] 1. A rotatable support shaft 3 on which a film take-up roll 4 is mounted, tension levers 11, 12, 14, 15 supported so as to be swingable in the vertical direction, and these levers 11, 12. , 14, 15, a brake 7 connected to the support shaft 3, and the tension levers 11, 1.
When the tension levers 11, 14, 15 are at the lowest movement position, the rotation of the support shaft 3 is prevented, and when the tension levers 11, 12, 14, 15 are moved upward from this position, the rotation of the support shaft 3 is allowed. Brake control means 34, 35 actuate the brake 7, and the tension lever 1 is activated at the film set working position where the tension lever 11, 12, 14, 15 is moved upward by a certain amount or more.
lever holding means 24, 25, 30, 31, 32, 33 for holding the film conveying device 41; a switch 39 for driving or stopping the film transport device 41;
switch control means 36 for actuating this switch 39 to stop the film transport device 41 when the filmstrips 2, 14, 15 are in the filmset working position;
37. A support device for a film winding roll in a packaging machine, characterized by comprising: 2 The lever holding means is the tension lever 11,1
Hanging members 24, 25 connected to 2, 14, 15 and a hooking part 3 that hangs these hanging members 24, 25
0, 31, 32, 33, and the switch control means includes a movable member 36 attached to the hanging members 24, 25 and tension levers 11, 12, 14, 15.
The movable member 36
A support device for a film take-up roll in a packaging machine according to claim 1, further comprising a spring 37 for biasing the film winding roll.