JPS593052A - Cutter for end part of intermediate film sandwiched between plate glass - Google Patents

Abstract

PURPOSE:To provide a titled device which can cut exactly a soft intermediate film, by applying a force in a specified direction to the swelled out part of the intermediate film by means of a rotary brush roll, suppressing the movement of the swelled out part with a guide plate and cutting said part with an endless beltlike cutting blade. CONSTITUTION:Laminated safety glass G produced by interposing an intermediate film B between two sheets of plate glass A formed to a desired size and shape and subjecting the same to a press sticking treatment is mounted to a holder. An endless beltlike blade 9 and a brush roll 11 are rotated and a movable arm 1 is moved to a prescribed position. When the roll 1 moves to the neighborhood of the glass A, it comes into contact with the end part B' of the intermediate film projecting from the circumferential edge of the glass A, presses the part B' to a guide plate 12 and pulls the same outward. The edge of the blade 9 in this stage is made to incise the end part B in the state of intersecting diagonally with the end face of the glass A and the blade is moved in the direction where the angle of diagonal intersection decreases gradually to incise the end part of the film until the side part of the blade 9 having no blade comes into contact with the end face of the glass A, when the arm 1 is moved on the set locus, whereby the end part B' projecting from the circumferential edge of the glass A is cut.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cutting a portion of an interlayer film sandwiched between glass sheets that protrudes from the area of the glass sheets.

Generally, laminated safety glass is used for vehicle front windshields, etc., in which an interlayer film such as polyvinyl butyral is interposed between two sheets of glass, and the sheets of glass are joined together by the adhesive force of the interlayer film. The laminated safety glass is made by interposing an interlayer film such as polyvinyl butyral cut into a shape slightly larger than the sheet glass between two sheets of glass that have been processed into the desired shape and dimensions, and then temporarily press-bonding the sheet glass so that it protrudes from the area of the sheet glass. It is manufactured by cutting off the end of the interlayer film and then autoclaving it.

Since the edge of the interlayer film protruding from the area of the plate glass is soft, it is difficult to cut the edge of the interlayer film by bringing the cutter into contact with the edge of the interlayer film under specified conditions, and furthermore, it is difficult to move the cutter along the continuous peripheral curve of the plate glass. It is very difficult to automatically cut the ends of the interlayer film. Therefore, the work of cutting and removing the end portion of the interlayer film is performed manually. Therefore, it is very inefficient and has drawbacks such as the blade accidentally coming into contact with the glass plate and causing damage.

The present invention was obtained as a result of intensive research aimed at solving the drawbacks of cutting and removing the ends of the interlayer film protruding from the plate glass, and providing an apparatus that can automatically cut and remove the ends of the interlayer film. It is something that

That is, in the present invention, a cutting mechanism is moved along the peripheral edge of a glass plate and is held between two glass plates.

In the device for cutting the end of the interlayer film protruding from the area of the plate glass, the cutting mechanism includes an endless belt-shaped cutting blade that rotates continuously, and a continuous cutting blade that rotates continuously to apply a force in a fixed direction to the protruding part of the interlayer film. The present invention provides a cutting device for cutting an end of an interlayer film held between glass plates, which comprises a rotating brush roll and a guide plate for suppressing movement of the protruding part of the interlayer film caused by the rotating brush roll.

FIG. 1 shows a schematic perspective view of an interlayer film end cutting device of the present invention, and its configuration will be explained based on the drawing.

2 is a movable arm, which moves along the periphery of the glass plate by a drive mechanism (not shown). 2 is a fixed frame attached to the movable arm 1, and 3 is a movable frame movably connected to the fixed frame 2 via a cylinder 4. 5 is an electric motor mounted on the fixed frame 2, and a drive pulley 6 is mounted on the output shaft. 7 is a driven pulley rotatably mounted on the movable frame 3, and 8 is a screw shaft, which is screwed onto the cylinder 4 via a spring (not shown) built into the cylinder 4. . Reference numeral 9 denotes an endless belt-shaped blade stretched between the driving pulley 6 and the driven pulley 7.

The tension of the endless strip-shaped cutter 9 is adjusted by changing the elastic force of a spring (not shown) using the screw shaft 8, and when an external force acts on the endless strip-shaped cutter 9, the movable frame 3 moves toward the fixed frame 2. The drive pulley 6 and the driven pulley 7 are moved so that the distance between their axes is small so that they can be bent freely. 10 is an electric motor attached to the cylindrical body 4, and a brush roll 1 is attached to the output shaft.
1 is installed. Reference numeral 12 denotes a guide grating having a notch a, which is attached to the cylindrical body 4.

The operation of cutting and removing the protruding end of the interlayer film by the interlayer film end cutting device having the above configuration will be described.

First, a laminated safety glass G is prepared in which an interlayer film B of polyvinyl butyral or the like is interposed between two glass plates A formed into desired dimensions and shapes and then pressure-bonded, and the laminated safety glass G is mounted on a predetermined holding device (not shown).

Next, the electric motor 5 of the interlayer film edge cutting device is activated to rotate the endless strip-shaped blade 9 via the drive pulley 6, and the electric motor 10 is activated to rotate the brush roll 11. In this state, the movable arm 1 is moved to a predetermined position. When the brush roll 1.1 moves close to the glass plate A, it comes into contact with the interlayer film end B1 protruding from the periphery of the glass plate A, and moves the interlayer film end B1 to the guide plate! 2 and pull it outward, resulting in the same state as when the operator grips and pulls the end Bl of the interlayer film. In this state, the cutting edge of the endless strip-shaped knife 9 is made to cut into the interlayer film end B with the cutting edge diagonally intersecting the end surface of the sheet glass, and the blade of the endless strip-shaped knife 9 is moved in a direction where the oblique angle becomes gradually smaller. Make the cut until the side without the edge comes into contact with the end surface of the glass plate A. Next, the movable arm 1 is moved along a preset trajectory to cut the interlayer film end Bl protruding from the periphery of the glass plate A. When cutting the interlayer film end portion Bl, the endless strip-shaped knife 9 deforms as shown in FIG. Intermediate film end Bl protruding from the periphery of the abutted plate glass A
Cut accurately.

Although the present invention can be practiced as described above, it is not limited to the examples.

Cutting the end of the interlayer film can be done by fixing the laminated safety glass and moving the blade as in the example, or by fixing the blade and moving the laminated safety glass, or by moving both the laminated safety glass and the blade. Although it can be carried out with a configuration in which the laminated safety glass is fixed and the cutter is moved, it is preferable from the viewpoint of control and miniaturization of the device.

In order to sufficiently cope with the case where the radius of curvature of the plate glass arm is small, the fixed frame may be rotatably attached to the movable arm, and the driving pulley and the driven pulley may have different cores.

It is desirable that the position of the guide plate or brush roll can be adjusted depending on the shape of the glass plate, the rigidity of the interlayer film, etc., and that the number of rotations of the brush roll can be changed.

As described above, the present invention includes a cutting mechanism including an endless band-shaped cutting blade that rotates continuously, a rotating brush roll that continuously rotates to apply a force in a fixed direction to the protruding portion of the interlayer film, and an intermediate portion generated by the rotating brush roll. The following effects can be achieved by forming a cutting device for the end of the interlayer film which is sandwiched between glass plates and is composed of a guide plate that suppresses the movement of the protruding portion of the film.

b) The end of the interlayer film protruding from the periphery of the glass plate is constantly pressed against the guide plate by the rotating force of the brush roll and is cut while being pulled outward, so the interlayer film is flexible. It can also be cut accurately.

Since the cutting blade uses a flexible endless belt-shaped cutting blade, the end of the interlayer film can be cut with high precision without damaging the glass plate or the cutting blade, even in areas where the radius of curvature of the glass plate is small.

c) By attaching the cutting mechanism to a movable arm that moves along substantially the same trajectory along the shape of the glass plate, the protruding portion of the interlayer film can be automatically cut and removed.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing one embodiment of the interlayer film end cutting device of the present invention. FIG. 2 is a schematic diagram showing the state of the cutting blade in a portion of the plate glass where the radius of curvature is small. 1: Movable arm 2: Fixed frame 3: Movable frame 4 = Cylindrical body 5.10: Electric motor 6: Drive pulley 7: Followed pulley 8: Screw shaft 9: Endless band-shaped blade 11: Brush roll 12 guide plate 2

Claims (1)

[Claims] (2) In a device that runs a cutting mechanism along the peripheral edge of a plate glass and cuts an end of an interlayer film that is sandwiched between two pieces of glass and protrudes from the area of the plate glass, the cutting mechanism is continuously rotated. It is composed of an endless strip-shaped cutting blade, a rotating plan roll that rotates continuously and applies a force in a fixed direction to the protruding part of the interlayer film, and a guide plate that suppresses the movement of the protruding part of the interlayer film caused by the rotating brush roll. A device for cutting an edge of an interlayer film held between glass plates.