JPH0319174B2 - - Google Patents

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 window seals, etc., in which an interlayer film such as polyvinyl butyral is interposed between two glass plates, and the plate glasses 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 has been processed into a desired shape and size, and temporarily press-bonding the sheet glass, and then protruding from the area of the sheet glass. Cut and remove the end of the interlayer film that is
It is then manufactured by autoclaving.

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 edges 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 hitting the glass plate accidentally 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, the present invention provides an apparatus for cutting an end of an interlayer film held between two glass plates by running a cutting mechanism along the peripheral edge of a glass plate and protruding from an area of the glass plates, in which the cutting mechanism is continuously rotated. It consists of an endless strip-shaped cutting blade that rotates continuously to apply 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. The present invention provides a device for cutting an end of an interlayer film held between two sheets of glass.

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.

Reference numeral 1 denotes 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. Reference numeral 5 denotes 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 threaded shaft, which is screwed onto the cylinder 4 via a spring (not shown) built into the cylinder. 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. As the pulley moves, the distance between the axes of the drive pulley 6 and the driven pulley 7 becomes smaller, allowing them to bend freely. Reference numeral 10 denotes an electric motor attached to the cylindrical body 4, and a brush roll 11 is attached to the output shaft. Reference numeral 12 denotes a guide plate 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 by interposing an interlayer film B of polyvinyl butyral or the like between two sheets of glass A formed into a desired size and shape and then being pressure bonded, and 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 11 moves close to the glass plate A, it comes into contact with the interlayer film end B' protruding from the periphery of the glass plate A, presses the interlayer film end B' against the guide plate 12, and pulls the interlayer film outward. The state is the same as when the operator holds and pulls the end portion B' 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 obliquely intersecting the end surface of the plate glass A, and the blade of the endless strip-shaped knife 9 is moved in a direction where the oblique angle gradually becomes 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 end portion B' of the interlayer film protruding from the periphery of the glass plate A. When cutting the interlayer film end portion B', the endless strip-shaped knife 9 deforms as shown in FIG. to accurately cut the end portion B' of the interlayer film protruding from the periphery of the glass plate A.

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 edge of the plate glass 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 belt-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 a The following effects can be achieved by forming a cutting device for the end of the interlayer film sandwiched between the glass plates, which is composed of a guide plate that suppresses the movement of the protruding portion.

(b) The edge of the interlayer film that protrudes from the periphery of the glass plate is constantly pressed against the guide plate by the rotational force of the brush roll and is cut while being pulled outward, so even if the interlayer film is flexible, it can be cut accurately. It can be cut into.

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

(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, 1
1: Brush roll, 12: Guide plate.

Claims (1)

[Claims] 1. A device for cutting an end of an interlayer film held between two glass plates by running a cutting mechanism along the peripheral edge of the glass plate and protruding from the area of the glass plate, in which the cutting mechanism is continuously rotated in the form of an endless strip. A cutting blade, a rotating brush roll that rotates continuously and applies force in a certain direction to the protruding part of the interlayer film,
1. A cutting device for cutting an end of an interlayer film held between glass plates, comprising a guide plate for suppressing movement of the protruding portion of the interlayer film caused by the rotating brush roll.