JPH0721299Y2 - Tenter paper feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tenter paper passing device used for a lateral stretching device for a film (including a sheet) which is grasped by a clip and stretched in the width direction.

(Prior Art) In general, a transverse stretching device that grips a film with a clip and stretches it in the width direction is composed of an oven and a clip that continuously runs in the oven. Then, the film that is continuously fed is bitten and gripped by the clips on both sides in front of the oven inlet, stretched in the width direction in the oven as the clip travels, and then released at the outlet to release the next film. Sent to the process.

In such a transverse stretching apparatus, it is necessary to satisfactorily set the film sent from the previous step at the start of stretching, but since the film supply rate from the previous step has been increased, it is manually performed. Filming operations are extremely dangerous. For this reason, in the conventional transverse stretching apparatus, a pair of belt conveyors for gripping the film and supplying the film end portion to the clip are provided on the receiving side (introduction side) of the film in the vicinity of the clip to automate the film setting. Attempts are being made.

Now, FIG. 4 is a plan view of a transverse stretching device proposed in Japanese Patent Laid-Open No. 63-15727, FIGS. 5 and 6 are side and front views of the film transfer device, and 1 is a film. 2, 2 is an oven, 3 is a clip, and 24 is a film transfer device. FIG. 4 shows a state in which the film 1 is set and stretched. Next, in FIGS. 5 and 6, 16 is a tenter, 17 is a roll, 18 is a thread plate, 15 is a belt conveyor, 19 is a belt, 20 is a pulley, 21 is a tightener, and 22, 23.
Is a lifting device. Now, the tenter 16 and the belt conveyor 15
Are installed facing each other with the film 1 in between,
Pressed by 3. In addition, it is preferable that the thread plate 18 has substantially the same height as the apex of the adjacent rolls 17.

First of all, the film is set on the belt 19 of the belt conveyor 15.
When is driven by a pulley 20, the tenter roll 17 in contact with the belt 19 is driven thereby. Then belt 19
When the film is fed between the roll ten of the tenter and
The film is transported in the direction of the arrow, and the end portion of the film is supplied to and held by the clip 3 to complete the film work. FIG. 5 and FIG. 6 show a state in which the device has been completed. It should be noted that, in FIGS. 5 and 6, after completion of the film setting, the elevating devices 22 and 23 are operated to move the tenter and the belt conveyor away from the film passage.

(Problems to be Solved by the Invention) In the prior art, when the film is passed through the belt conveyor to hold the end of the film by the clip, the state where the film and the clip have a good relationship as shown in FIG. And the clip are parallel and the edge of the film does not enter the inside of the clip), and if the film cannot be gripped, the width of the film width can be kept as it is with the tenter 16 or the belt conveyor 15. Since it was not possible to change the position and orientation of the direction, the belt conveyor 15 had to be raised by the elevating device 22, the film was pulled back to the entrance side, and then the belt conveyor 15 had to be lowered again to carry the film again. . 3B and 3C show a state where the relationship between the film and the clip is not good. In the state of B, the film does not enter the inside of the clip and is separated, and in the state of C, the film is not attached to the clip. This is the case when the posture is not parallel and inclined.

The present invention has been proposed to solve the above conventional problems.

(Means for Solving the Problems) For this reason, the present invention provides a lateral stretching device for a film, which stretches the film in the width direction by gripping both sides in the width direction of the film that are continuously supplied with the clips, respectively. On the film introduction side, a metal belt and a static electricity imparting device are arranged so as to face each other, and this is a means for solving the problem.

(Function) The film is brought into close contact with the metal belt by the static electricity generated between the metal belt and the film generated by the static electricity imparting device, and is conveyed toward the clip. Further, the adhesion between the film and the metal belt can be adjusted by adjusting the discharge amount of the static electricity applying device.

(Embodiment) The present invention will be described below with reference to the embodiments of the drawings. Figs. 1 to 3 show an embodiment of the present invention. In the figure, 1 is a film, 3 is a clip, and these are the same as in FIG.

Now, FIG. 1 is a cross-sectional view of the film transfer device 4 as viewed from the side, and FIG. 2 is a cross-sectional view of the device as viewed from the front, showing a state in which the film 1 is being transferred. Film transfer device 4
Like the film transfer device 24 in FIG. 4, is provided in the film introducing portion of the lateral film stretching device in parallel with the running clip row. The main components are a static electricity imparting device 5 provided on the upper portion of the film and a film transporter 6 provided at a position facing it. In addition, an endless belt 8 made of metal is wound around a pulley 9 in the film transporter 6 and driven and rotated by a tensioner 10 arranged midway in an appropriately tensioned state.

On the other hand, a discharge electrode 7 is provided in the upper static electricity imparting device 5, and cylinders 11 and 12 are provided at the central portion of the upper surface of the static electricity imparting device 5 and the lower surface of the film transfer device 6, respectively.
The cylinders 11 and 12 have a function as an elevating device for elevating the static electricity imparting device 5 and the film transfer device 6. Of course, these lifting devices are not limited to cylinders, but other cam mechanisms, link mechanisms or the like may be used. Further, FIG. 1 and FIG. 2 show static electricity imparting device 5
Shows the state in which the film 1 is lowered and the film transporter 6 is raised to convey the film 1. FIG. 3 is an enlarged plan view of one side of the film introducing portion of the lateral film stretching apparatus equipped with the embodiment apparatus of the present invention. In FIG. 3, 13 is a rotary drive shaft for running the clip 3.

Next, the operation of the embodiment configured as described above will be described. To start the film 1, the metal belt 8 of the film transporter 6 is first driven by the pulley 9. Next, the static electricity applying device 5 is turned on to start discharging from the discharge electrode 7 in the static electricity applying device 5.

Then, when the film 1 is supplied between the static electricity applying device 5 and the film transfer device 6, static electricity is generated between the film 1 and the metal belt 8 in the film transfer device 6, so that the film 1 is transferred to the metal belt 8. The metal belt 8 is closely contacted and transported in the direction of the arrow as the metal belt 8 advances, the end portion of the film 1 is supplied to the inside of the clip 3, and is reliably gripped by the clip 3 to complete the passage of the film 1. FIG. 1 and FIG. 2 show a state in which the sheet passing is completed.

At this time, the adhesive force between the film 1 and the metal belt 8 is adjusted by a dial (not shown) for adjusting the discharge amount from the discharge electrode 7 provided in the vicinity of the film transfer device 4.
It can be adjusted by changing the amount of static electricity between the metal belt 8 and. It should be noted that, in FIGS. 1 and 2, after the film has been passed, the upper and lower cylinders 11 and 12 are operated to move the static electricity imparting device 5 and the film transporter 6 away from the film passage.

However, when the film 1 is supplied between the static electricity imparting device 5 and the film transporter 6 and passed through the clip 3, the film 1 is positioned at a good position with respect to the clip 3 as shown in FIG. It does not always have a posture, and it is often separated from the clip like B, or it is not parallel to the clip like C and has an inclined posture. In such a case, a dial for adjusting the amount of discharge from the discharge electrode 7 provided in the vicinity of the film transfer device 4 reduces the adhesive force between the film 1 and the metal belt 8 to reduce the position and posture of the film 1. To a good one for clip 3. After that, the adhesion is restored again by dialing, and the paper feed operation is continuously performed to supply the film 1 to the clip 3. It should be noted that it is not necessary to stop the driving of the metal belt 8 not only when the adhesion is reduced by the dial but also when the static electricity imparting device 5 and the film transporter 6 are moved away from the film passage by the cylinders 11 and 12.

(Effect of the Invention) As described in detail above, in the present invention, since the metal belt and the static electricity imparting device are arranged facing each other on the film introduction side near the clip, the adhesion between the metal belt for film transport and the film The force can be easily adjusted, and the paper passing operation can be performed while adjusting the position and posture of the film, so the success rate of the paper passing operation can be increased.

[Brief description of drawings]

FIG. 1 is a side view of a tenter paper feeding device according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is an enlarged plane of one side of a film introduction section of a film transverse stretching device equipped with an embodiment of the present invention. FIG. 4 is a plan view of a conventional transverse stretching device, FIG. 5 is a side view of a conventional film transfer device, and FIG. 6 is a front view of the same. Description of main parts of the figure 1 ... Film, 3 ... Clip 4 ... Film transfer device, 5 ... Static electricity imparting device 6 ... Film transfer device, 7 ... Discharge electrode 8 ... Metal belt

Claims (1)

[Scope of utility model registration request] 1. A lateral stretching device for a film, which stretches the film in the width direction by gripping both sides in the width direction of the film continuously supplied, with a metal belt and static electricity on the film introduction side near the clip. A tenter paper feeding device, characterized in that the applying devices are arranged facing each other.