JPH056103Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention is applicable to continuous biaxial stretching equipment for plastic films, sheets, etc. (hereinafter, the term "film" is used as a generic term for these). The present invention relates to a guide roll device for plastic film forming installed between a longitudinal stretching machine and a transverse stretching machine.

(B) Prior Art In a conventional continuous biaxial stretching apparatus, as shown in FIGS. 4 and 5, a guide roll device 3 is provided between a longitudinal stretching machine 1 and a transverse stretching machine 2. The guide roll device 3 controls the exit height of the film 7 sent out from the longitudinal stretching machine 1 and the height of the film 7 sent to the transverse stretching machine 2.
This is provided for the purpose of adjusting the difference in supply height. The guide roll device 3 has a first guide roll 5 and a second guide roll 6 mounted on a pair of independent left and right roll stands 4, 4 in a substantially vertical direction.
Book guide rolls are arranged vertically, and the bearings at both left and right ends of the first guide roll 5 and the second guide roll 6 are fixed to a pair of left and right roll stands 4, 4, and are driven for rotation. It has a free rotation structure that does not have a source and rotates as the film flows.

Note that if the guide roll device 3 is provided only for the purpose of adjusting the running height of the film 7, the function can be achieved even if only one guide roll is provided. The area where the film contacts the roll surface, the angle at which the film wraps around the roll, becomes smaller.
Due to the rotational frictional resistance of the bearing, etc., the rotational speed of the roll surface cannot fully follow the film speed, causing a slip phenomenon between the roll surface and the film contact surface, resulting in scratches on the film. In order to prevent this, the structure is usually made up of two guide rolls, which cross the film so that the film is held at a sufficient angle and the rotation of the rolls completely follows the speed of the film. has been done.

(c) Problems to be solved by the invention This conventional guide roll device has the structure described above, so when trying to operate the continuous biaxial stretching device, the operator has to perform manual work. Therefore, holding the leading end of the film 7 sent out from the longitudinal stretching machine 1, the second guide roll 6 is wound approximately half a turn from the bottom side of the second guide roll 6 of the guide roll device 3, and the first guide roll 5 It is necessary to pass the material across the material between the first guide roll 5 and the second guide roll 6, pull it up to the upper side of the first guide roll 5, and then feed it to the transverse stretching machine 2. Moreover, the speed of the film fed from the longitudinal stretching machine 1 to the transverse stretching machine 2 is
It is fed at a fairly high speed (typically 150-500 meters/min) and requires quick work. Such work using conventional equipment has poor workability, and improvements have been desired from the viewpoint of safety. The present invention was developed in view of these problems with conventional devices, and has improved workability and efficiency compared to conventional devices.
The object of the present invention is to provide a guide roll device with excellent safety.

(d) Means for solving the problems In order to solve the above problems, the present invention is constructed as follows. That is, a pair of left and right roll stands, a first guide roll rotatably supported by the roll stands, and shafts at both ends of the first guide roll are swingable about the axis of the first guide roll. A pair of left and right arms provided,
The apparatus includes a second guide roll rotatably supported by the arm, and means for lifting the second guide roll to a position above the first guide roll by swinging the pair of arms.

In addition, as a means for lifting the second guide roll to a position above the first guide roll by swinging the pair of arms, both ends of the support member are fixed to a pair of left and right roll stands,
A bracket is provided on the support member, the cylinder side of the fluid pressure cylinder is connected to the bracket by a pin joint, and the rod side end of the fluid pressure cylinder is connected to a bar member fixed to a pair of left and right arms by a pin joint. However, if it is constructed by controlling the pressure fluid supplied to the fluid pressure cylinder, the operation is easy.

(e) Effect When operating a continuous biaxial stretching machine using this device, first swing the pair of arms to lift the second guide roll to a position above the first guide roll, and then start the longitudinal stretching machine. Holding the leading edge of the film sent out from the 1st guide roll, the film is passed horizontally between the 2nd guide roll and the 1st guide roll, which have already been lifted, and then fed to the transverse stretching machine. The second guide roll, which has been lifted to the upper position, may be lowered to a predetermined position below.

The raising and lowering operation of the second guide roll is performed by a fluid pressure cylinder connected by a pin joint to a bracket provided on a support member connected to a pair of left and right roll stands, and a rod side tip of the fluid pressure cylinder. By pin joint, left and right 1
This can be accomplished very easily by connecting a bar member fixed to the pair of arms and controlling the pressure fluid supplied to the hydraulic cylinder using a control valve.

(F) Embodiments The present invention will be described in detail below based on drawings showing embodiments thereof. FIG. 1 is a front view of the guide roll device according to the present invention, FIG. 2 is a view taken from the - line in FIG.
This figure shows a state in which the film threading operation is performed at the same position as in FIG. 2. In the diagram, left and right 1
A bearing 1 is attached to the upper end of the pair of roll stands 11, 11.
2 is provided, and the first guide roll 1 is provided with the bearing 12.
The first guide roll 13 is rotatably supported on both end shaft portions 14, 14 of the first guide roll 13. Further, a pair of left and right arms 16, 16 are attached to both end shaft portions 14, 14 by separate bearings 15 so as to be swingable about the axis of the first guide roll 13.
The arms 16, 16 are provided with a bearing 17 at the end opposite to the bearing 15 to support the shaft portions 19, 19 at both ends of the second guide roll 18.
is rotatably supported. Further, both ends of the support member 20 are fixed to a pair of roll stands 11, 11, and a bracket 2 is attached to the support member 20.
1 is provided, and the cylinder side of the hydraulic cylinder 22 is attached to the bracket 21 by a pin joint 23. The tip of the piston rod of the hydraulic cylinder 22 is a bar member 2 whose both ends are fixed to a pair of left and right arms 16, 16 by a pin joint 24.
It can be attached to 5. The operation of the hydraulic cylinder 22 is controlled by a hydraulic device (not shown). Reference numeral 26 designates the plastic film processed by the apparatus.

Next, the operation of the embodiment will be explained. When operating the continuous biaxial stretching apparatus, first, a control valve of a hydraulic device (not shown) is operated to supply pressure oil to the hydraulic cylinder 22, and the pair of left and right arms 1 are supplied via the bar member 25.
6, 16 and the second guide roll 18 are swung around the axis of the first guide roll 13, and the second guide roll 18 is lifted and held at a higher position than the first guide roll 13. Next, hold the tip of the film 26 sent out from the longitudinal stretching machine, and hold the second film 26 which has already been lifted.
It is passed horizontally between the guide roll 18 and the first guide roll 13 to be supplied to the horizontal stretching machine, and then the control valve of the hydraulic system is operated to shorten the hydraulic cylinder 22 and the second guide roll 18 is moved downward. All you have to do is lower it to the specified position.

As a result, when operating a continuous biaxial stretching device, it is much easier and faster to operate than conventional devices.
Moreover, it has become possible to safely feed the film sent out from the longitudinal stretching machine to the transverse stretching machine through the guide roll device.

In this embodiment, a hydraulic cylinder is used as a means for lifting the second guide roll to a position above the first guide roll by swinging a pair of arms, and the hydraulic pressure supplied to the hydraulic cylinder is controlled. However, other configurations are also possible.

(g) Effects of the invention As explained above, according to the invention, a pair of left and right roll stands, a first guide roll rotatably supported by the roll stands, and shaft portions at both ends of the first guide roll are provided. a pair of left and right arms that are swingably provided around the axis of the first guide roll, and a second arm that is rotatably supported by the arms.
Since the configuration includes a guide roll and a means for lifting the second guide roll to a position above the first guide roll by swinging the pair of arms, when operating a continuous biaxial stretching apparatus, it is possible to It is extremely easy and quick compared to other equipment.
Moreover, the film sent out from the longitudinal stretching machine can be safely supplied to the transverse stretching machine through the guide roll device.

[Brief description of the drawings]

FIG. 1 is a front view of the guide roll device according to the present invention, FIG. 2 is a view taken from the - line in FIG. 4 is a plan view of the conventional device, and FIG. 5 is a side view of the conventional device. 11...Roll stand, 12...Bearing, 13
...First guide roll, 14...Shaft portion, 15...
Bearing, 16... Arm, 17... Bearing, 18...
2nd guide roll, 19...Shaft portion, 20...Support member, 21...Bracket, 22...Hydraulic cylinder, 23, 24...Pin joint, 25...
...Bar member, 26...Film.

Claims (1)

[Claims for Utility Model Registration] (1) A guide roll device for plastic film forming installed between a longitudinal stretcher and a transverse stretcher in a continuous biaxial stretching device, comprising a pair of left and right roll stands, and the roll stands. a first guide roll rotatably supported on the first guide roll; a pair of left and right arms provided on both end shaft portions of the first guide roll so as to be swingable about the axis of the first guide roll; A rotatably supported second guide roll; and means for lifting the second guide roll to a position above the first guide roll by swinging the pair of arms. A guide roll device for plastic film forming. (2) Using a fluid pressure cylinder as a means for lifting the second guide roll to a position above the first guide roll by swinging the pair of arms, and controlling the fluid supplied to the fluid pressure cylinder. A guide roll device for forming a plastic film as set forth in claim 1 of the registered utility model.