JPH0843808A - Overturn transfer device of glass substrate-containing cassette for liquid crystal display device - Google Patents

Abstract

PURPOSE:To provide a device for overturning and transferring cassettes housing plural sheet of glass substrates for liquid crystal display devices. CONSTITUTION:This overturn transfer device 20 has a cassette supporting piece 31 which is formed to an L shape by a placing piece 33 to be placed with the bottom plate of a glass substrate-contg. cassette and a back rest piece 34 for accepting the back part of the cassette, placing projections 39 to 42 projectingly disposed on the placing piece to lean the cassette on the back rest piece in the erecting state of the cassette supporting piece and a cassette overturning means 32 for overturning and stopping the cassette when the entire surface at the back of the cassette arrives near the horizontal plane by overturning the cassette supporting piece behind the back rest piece from the erecting state. The cassette supporting piece 31 supports the cassette by leaning the cassette on the back rest piece 34 by the placing projection in the erecting state and puts the cassette to a horizontal position by overturning the cassette behind the back rest piece 34. The glass substrates are erected in the state of maintaining contact with the back of the cassette when the cassette is placed horizontal and, therefore, the damaging of the glass substrates by shaking within the cassette does not arise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a liquid crystal display (LCD).
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overturning transfer device for overturning and transferring a cassette that stores a plurality of glass substrates for use.

[0002]

2. Description of the Related Art Conventionally, a glass substrate for a liquid crystal display is placed on a shelf S in a vertical cassette (see FIG. 6) C and transported in a horizontal state or a horizontal cassette C in a manufacturing process. It is designed to be transported in an upright position inside. The cassette C is placed on the cassette support 10 which is formed in a right angle L shape by the cassette mounting piece 11 and the backrest piece 12, and is laid down by the cassette support 10 falling in the direction of arrow A. Laid cassette C
Is received by the cassette receiver 13 (see FIG. 7) rising from below the cassette support 10 and is conveyed to the next step while lying down. Cassette mounting piece 11
The cassette receiver 13 and the cassette receiver 13 constitute an overturning transfer device.

[0003]

However, such a cassette support 10 has the following problems. (1) When the cassette C is placed on the cassette support 10, the backrest piece 12 of the cassette support 10 is substantially vertical in the standing state of receiving the cassette C.
It is difficult to closely attach the back portion B of the backrest piece 12 to the backrest piece 12, and a gap D is created between the back portion B and the backrest piece 12, and when the cassette support 10 is turned over, the cassette C is placed on the cassette mounting piece. The glass substrate G is slid on 11, hits the backrest piece 12, and the glass substrate G is damaged by the impact.

(2) Since the cassette support 10 tilts the cassette C until the back portion B of the cassette C becomes horizontal, when the cassette C is received by the cassette receiver 13, the glass substrate G stands up in the cassette C. When worn, it may rattle in the thickness direction and may be damaged.

[0005]

SUMMARY OF THE INVENTION The present invention is a cassette formed in an L-shape by a mounting piece on which a bottom plate of a cassette containing a glass substrate for a liquid crystal display is mounted and a backrest piece which receives the back portion of the cassette. A support, a mounting projection that is provided on the mounting piece so as to project the cassette on the backrest piece in a standing state of the cassette support, and the cassette support from the standing state to the rear of the backrest piece. The above-mentioned problem is solved by a falling transfer device including a cassette falling means that causes the cassette to fall and stop when the entire back surface of the cassette reaches the vicinity of a horizontal plane.

Further, according to the present invention, a cassette is provided which is provided with a supporting projection for supporting the cassette at an inclining angle smaller than an inclining angle with respect to a horizontal plane of the cassette which is overturned by the cassette supporting member and which can be moved up and down with respect to the cassette supporting member. The above-mentioned problem is solved by the inversion transfer device of the cassette further including the receiver.

[0007]

The cassette support supports the cassette in the upright state. The cassette is supported by being supported by the backrest piece by the mounting protrusion. At this time, the glass substrate in the cassette is in contact with the back portion. After that, the cassette overturning device causes the cassette supporter to overturn behind the backrest piece. Since the back of the cassette is received by the backrest piece, the cassette lays on the cassette support without being displaced. Further, since the glass substrate housed in the cassette stands upright while contacting the back portion, there is no rattling during the fall of the cassette.

The cassette overturning means stops the overturning of the cassette support when the entire back surface of the cassette is tilted to near the horizontal plane. The cassette lies sideways, but not right next to it, with one end tilted up against the horizontal. Therefore, the glass substrate is tilted in the thickness direction which is stable in the cassette.

Then, the cassette receiving body rises with respect to the cassette supporting body and receives the cassette at a falling angle smaller than the falling angle of the cassette with respect to the horizontal plane. The cassette receiver comes into contact with one end of the cassette during ascent, and further lifts while pushing up one end to receive the entire cassette.
Therefore, the load of the cassette is gradually applied to the cassette receiver so that it is not applied at once. Further, by this, the cassette is gently transferred from the cassette supporting member to the cassette receiving member while the glass substrate is tilted in the stable thickness direction in the cassette.

[0010]

Embodiments of the present invention will be described below with reference to FIGS. The overturning transfer device (see FIG. 1) 20 includes an overturning device 21 for overturning the cassette C, a receiving device 22 for receiving the cassette C overturned by the overturning device 21 from the overturning device 21 and sending it to the device for the next process. It is composed of.

The tipping machine 21 (see FIG. 1) will be described. The overturning device 21 is composed of an L-shaped cassette support 31 for receiving the cassette C sent from the previous step, a cassette overturning device 32 for overturning the cassette support 31, and the like.

The cassette support 31 (see FIGS. 1, 2 and 4) will be described. The cassette support 31 includes a mounting piece 33 on which the bottom plate E (see FIG. 5) of the cassette C is mounted,
It comprises a pair of cassette support arms 35, 35 formed in an L shape by a backrest piece 34 for receiving the back portion B (see FIG. 5) of the cassette C. Cassette support arm 3
Reference numeral 5 denotes a support shaft 38 rotatably provided on a pair of columns 37, 37 provided upright on the frame 36 of the falling transfer device 20.
It is fixed to.

Each mounting piece 33 (see FIG. 4) has a pair of mounting protrusions 39, 40, 4 for supporting the bottom plate E of the cassette C.
1, 42 are projected. A pair of mounting protrusions 3 on the right side
The heights of 9 and 40 are set to be higher than the height of the pair of transfer protrusions 41 and 42 on the left side. The mounting protrusions 40 and 42 are
In the drawing, the placement projections 39 and 41 appear to overlap. Each backrest piece 34 is provided with a pair of backrest projections 43, 44, 45, 46 that receive the back portion B of the cassette C.
The backrest protrusions 44 and 46 are the backrest protrusions 43 and 4 in the drawing.
It looks like it overlaps 5.

Convenience 4 on the pair of cassette support arms 35
A virtual surface formed by connecting the tips of the four mounting protrusions 39, 40, 41, 42 is defined as a virtual mounting surface 47, and is formed by connecting the tips of the four backrest projections 43, 44, 45, 46. When the surface is the virtual backrest surface 48, the virtual mounting surface 47 is in the upright state of the cassette support 31 shown in FIGS. 1 and 4.
And the virtual backrest surface 48 are substantially at right angles to each other, and the virtual placement surface 47 is higher on the right side than on the left side due to the height difference of the placement protrusions 39, 40, 41, 42, and the virtual backrest surface. 48 is leaning to the left.

Cassette tipping means 32 (see FIGS. 1 and 2)
Will be described. The cassette overturning unit 32 includes a reduction gear motor 50 provided on the frame 36 of the overturning transfer device 20, a connection link mechanism 52 that connects the output shaft 51 of the motor 50 and the support shaft 38 of the cassette support 31 and the like. It is composed of.

The connecting link mechanism 52 includes a drive cam 53 provided on the output shaft 51 of the motor 50, a drive side intermediate cam 55 fixed on an intermediate shaft 54 rotatably provided on the frame 36, and a driven side intermediate. The cam 56, the driven cam 57 on the support shaft 38, the drive side connection link 58 that connects the drive cam 53 and the drive side intermediate cam 55, and the driven side intermediate cam 5.
6 and the driven cam 57, and a driven side connecting link 59. The driven-side intermediate cam 56, the driven-side connecting link 59, and the driven cam 57 include the columns 37, 3 respectively.
7 is located on the side surface, but one side driven link 5
9 and the driven cam 57 are omitted in the drawing.

As a means for connecting the output shaft 51 of the motor 50 and the support shaft 38 of the cassette support 31, a belt, a chain or the like can be considered in addition to the connection link mechanism.
These may cause dust (preferably less dust in the manufacturing process of the liquid crystal display), or may be extended by long-term use, and the tipping angle of the cassette support 31 may be misaligned. Therefore, the connection transfer mechanism 52 is used in the falling transfer device 20 of the embodiment.

The receiver 22 (see FIGS. 1 to 3) will be described. The receiver 22 includes an elevating cylinder 60, an elevating frame 68, a horizontal moving cylinder 61, a horizontal moving frame 69, a rotary actuator 62, a cassette receiver 63, and the like.

An elevating cylinder 60 is provided on the frame 36 of the overturn transfer device 20, and an elevating frame 68 is provided on a piston 64 of the cylinder 60. The elevating frame 68 is configured to elevate and lower by elevating the piston 64 and guiding four elevating guides 65 (one of which is invisible in the drawing). Lifting frame 68
A horizontal movement cylinder 61 is installed on the upper side, and a horizontal movement frame 69 is linearly reciprocally movable via a linear movement guide 66.

The horizontal movement frame 69 is provided with a rotary actuator 62. A cassette receiver 63 is provided on an output shaft 67 of the rotary actuator 62. At the four corners of the upper surface of the cassette receiver 63, L-shaped support protrusions 71, 72, 73, 7 for supporting the back portion B of the cassette C which has been tumbled by the tumbling machine 21.
4 is projected. Of the four support protrusions, the two support protrusions 71, 72 on the right side in FIG. 1 (which appear as one overlapping in FIG. 1) are the two support protrusions 73, 74 on the left side.
It is set lower.

If a surface formed by connecting the surfaces on which the cassette C is placed among the four support projections 71, 72, 73 and 74 is a virtual receiving surface 75, the inclination angle α of the virtual receiving surface 75 with respect to the horizontal plane is The inclination angle β of the virtual backrest surface 48 with respect to the horizontal plane when the cassette support 31 falls is set smaller than β. The inclination angle α is the cassette support 3
It is also the falling angle of the cassette C placed on the No. 1 and the inclination angle β
Is also the falling angle of the cassette C received by the cassette receiver 63. By the way, the fall angle α is about 7 degrees and the fall angle β
Is about 3 degrees.

Next, the operation of the overturn transfer device 20 will be described. The cassette C is conveyed while standing on the tray T of the carry-in device. The glass substrate is stored horizontally in the cassette C. The cassette C sticks out from both sides of the tray T. The tray T includes a pair of cassette support arms 35,
After entering between 35, it descends and lowers the cassette C onto the mounting protrusions 39, 40, 41, 42 of the cassette support 31.

The cassette support 31 supports the cassette C by leaning it against a backrest piece 34 in an upright state. The back portion B of the cassette C is a backrest protrusion 43, 4 on the backrest piece 34.
The glass substrate in the cassette C is abutted against the back portion B by being received by 4, 45 and 46. Then, the motor 50 is started. The rotational force of the motor 50 is the driving cam 53, the driving side connecting link 58, the driving side intermediate cam 55, the intermediate shaft 54, the driven side intermediate cam 56, the driven side connecting link 59, and the driven cam 5.
7 is transmitted to the support shaft 38, and the cassette support 3
1 falls behind the backrest piece 34.

In the cassette C, since the back portion B of the cassette C is received by the backrest piece 34, the cassette support 3
The position on 1 does not shift. Also, cassette C
The glass substrate stored in is in contact with the back part B,
No rattling.

When the entire back surface B of the cassette C is tilted to the vicinity of the horizontal plane, the cassette tipping means 32 is a cassette support 31.
To stop the fall. The stop is performed by operating a switch (not shown) in any of the drive cam 53, the drive-side intermediate cam 55, the driven-side intermediate cam 56, the driven cam 57, and the cassette support 31. Although the cassette C lies sideways, it is not right sideways, but is inclined so that the left end in FIG. 4 is raised with respect to the horizontal plane. The glass substrate is inclined in the thickness direction which is stable due to the inclination of the cassette C. by this,
The glass substrate is transferred to the receiver 22 together with the cassette C without rattling in the cassette C.

When the cassette C is turned over by the overturning device 21, the cassette receiver 63 is raised by the lifting cylinder 60 to receive the cassette C. Since the falling angle of the cassette C placed on the cassette support 31 is smaller than the falling angle of the cassette C received by the cassette receiver 63, the cassette C is placed on the cassette receiver 63 from the cassette support 31. 4 of the four support protrusions (two support protrusions are not shown) on the cassette receiver 63, the right side support protrusions 71 and 72 (the protrusions 72 are not shown) are first set in the cassette C. Abuts and supports the back B,
After that, the left side support protrusions 73 and 74 contact and support the back portion B of the cassette C.

The cassette C is transferred to the cassette receiver 63 while tilting in the direction of arrow A in FIG. 5, and the bottom plate E of the cassette C is separated from the mounting piece 33 of the cassette support 31.
Then, the load of the cassette C is gradually applied to the cassette receiver 63, and the cassette C is gently placed on the cassette receiver 63.

As a result, the glass substrate housed in the cassette C is not shaky and is not damaged. Further, while the cassette C is transferred to the cassette receiver 63, the bottom plate E of the cassette C does not rub the mounting piece 33 of the cassette support 31, and the cassette C does not vibrate and is quiet. It is transferred to the cassette support 31.

Cassette receiver 6 which has received the cassette C
3 is provided on the horizontal moving frame 69 that horizontally moves on the elevating frame 68, the horizontal moving cylinder 6
By the operation of No. 1 and the guide of the linear movement guide 66, the elevator frame 68 is moved leftward in FIG. After that, the cassette receiver 63 is horizontally rotated by the rotary actuator 62, and the direction of the cassette C is changed to a direction in which it can be easily handed over to the receiver 22 (not shown) in the next step.
It is lowered by the operation of the lifting cylinder 60, and the cassette C is delivered to the receiver 22.

[0030]

According to the tipping transfer device of the first aspect of the present invention, the cassette is tilted by the mounting projection and is supported by the backrest piece so that the backrest piece and the backrest piece are separated from each other or the cassette support piece falls over. The position of the cassette does not shift on the cassette support piece. Therefore, the glass substrate housed in the cassette is not damaged. Also, the cassette support is set up in the cassette because the cassette supporter is caused to fall from the standing state to the rear of the backrest piece and stopped when the entire back surface of the cassette reaches the vicinity of the horizontal plane. The glass substrate is inclined in the stable thickness direction, and the glass substrate is not damaged by the subsequent transportation of the cassette. When the cassette that has been tumbled by the cassette support is received by the cassette receiver at a tumbling angle smaller than the tumbling angle of the casked cassette support with respect to the horizontal plane of the cassette, the load of the cassette is gradually increased. Since the cassette is transferred to the cassette receiver and the cassette is transferred from the cassette support to the cassette receiver without impact, it is possible to transfer the glass substrate standing in the cassette without impact, and the glass substrate Will not damage the

[Brief description of drawings]

FIG. 1 is a front view of an inversion transfer device according to an embodiment of the present invention, which is a view after a cassette receiver has received a cassette (not shown) from a cassette support.

FIG. 2 is a left side view of FIG. 1 with a part omitted.

FIG. 3 is a diagram for explaining the operation of the receiver.

FIG. 4 is a front view of a portion of a cassette support body and a cassette receiving body that receives a cassette.

FIG. 5 is a diagram for explaining the operation of the overturn transfer device.

FIG. 6 is a diagram for explaining the operation of a conventional falling transfer device.

FIG. 7 is a diagram for explaining the operation of a conventional falling transfer device.

[Explanation of Codes] G Glass substrate C Cassette E Bottom plate B Back part α Tilting angle of cassette on cassette support β Tilting angle of cassette on cassette receiver 20 Tumble transfer device 31 Cassette support 3
2 cassette tipping means 33 mounting piece 34 backrest piece 39, 40, 41, 42 mounting protrusion 6
3 cassette receiver 71, 72, 73, 74 support protrusion

Claims (2)

[Claims] 1. A cassette support formed in an L shape by a mounting piece on which a bottom plate of a cassette containing a glass substrate for a liquid crystal display is mounted, and a backrest piece for receiving a back portion of the cassette, and the above-mentioned mounting piece. A mounting protrusion that is protruded from the cassette support body to lean the cassette on the backrest piece in the upright state of the cassette support body, and the back portion of the cassette by tilting the cassette support body from the upright state to the rear of the backrest piece. An overturning transfer device for a cassette containing a glass substrate for a liquid crystal display, comprising: an overturning means for stopping overturning when the entire surface reaches near a horizontal plane. 2. A cassette receiving body which is provided with a supporting projection for supporting the cassette at a tilt angle smaller than a tilt angle of the cassette that has been tumbled by the cassette support and is capable of moving up and down with respect to the cassette support. An apparatus for inversion transfer of a cassette containing a glass substrate for a liquid crystal display according to claim 1.