KR102020558B1 - Apparatus for transferring and system for transferring using the same - Google Patents

Abstract

The present invention relates to a transfer apparatus and a transfer system for a component cassette for a display product using the same, which largely adjust height of transfer rollers in three steps when introducing a cassette into the transfer rollers of a transfer apparatus installed on a lifter car in a lifting path at a conveyor of a clean room and largely adjust the height of the transfer rollers in three steps in a reverse order of introduction of the cassette when discharging the cassette to the conveyor of the clean room from the transfer rollers of the transfer apparatus installed on the lifter car in the lifting path, thereby being possible to stably perform processes of introduction and discharge of the cassette.

Description

Transfer material transfer device and parts cassette transfer material system for display products using the same {APPARATUS FOR TRANSFERRING AND SYSTEM FOR TRANSFERRING USING THE SAME}

The present invention relates to a conveyance device for conveying a component cassette for a display product, and a conveyance transfer system using the same, in particular, to a cassette loading point through a sensor during cassette loading and unloading, according to a specific detection value. The present invention relates to a transfer material transfer device which enables stable carrying in and out through a smooth transfer operation when a cassette transfer device is moved in and out of the cassette by adjusting the height of the transfer material transfer device and a component cassette transfer material system for a display product using the same.

Display products such as Liquid Crystal Display (LCD) and Plasma Display Panel (PDP) products are manufactured in a clean room, and the clean room is a multi-storey factory building. The display products are manufactured while conveying the parts and semi-assemblies to be made to the clean rooms on each floor.

The parts or semi-assemblies are transported in a cassette, and a lift path is provided on one side of the clean rooms for transport between floors, and a lifter car is installed on the lift path so as to be liftable. The clean room is equipped with a transfer device for moving a cassette between the lifter car and the clean room.

As a technology related to such a transfer material transfer device,

Republic of Korea Patent Registration No. 10-0689072 (registered Feb. 23, 2007, hereinafter referred to as 'Document 1') `` Part cassette conveying transfer device for display products '' is presented,

Document 1 is a clean room, which is formed on each floor of a building of a display product manufacturing plant, and has a clean room entrance, a cassette mounting table installed inside the clean room to load a cassette, and a base installed inside the clean room. A fixed roller conveyor for carrying a cassette loaded by a frame installed on the base and a plurality of rollers rotatably supported by the frame, and a hoistway installed on one side or the center of the clean room over the entire floor of the manufacturing plant building. A lifter car which is installed on the hoistway and has a lifter car door corresponding to the cleanroom doorway, a cleanroom door and a lifter car door that opens and closes the cleanroom doorway and the lifter car door, and is installed inside the lifter car; Base having the same structure as the fixed roller conveyor and installed in the base In the parts cassette conveying transfer device for display products comprising a moving roller conveyor type transfer device moving forward and backward and up and down, including a moving roller conveyor composed of a frame and a plurality of rollers rotatably supported on the frame A pair of height sensing sensors installed to face each other at a clean room door side end of the base of the fixed roller conveyor and a lifter car door side end of the base of the moving roller conveyor; It is installed between the bottom of the lifter car and the base of the moving roller conveyor to move up and down according to the detection signal of the pair of height detection sensors to move the moving roller conveyor up and down to exactly level the fixed roller conveyor and the moving roller conveyor. The roller conveyors are installed in the lifter car and in the clean room so that the parts cassettes can be transported and transported. The fixed roller conveyor in the clean room and the moving roller conveyor in the lifter car can be accurately leveled. The two-stage cassette stacker can be installed in the clean room to enhance the utilization of the factory site while safely carrying the transfer of the cassette, and to improve productivity by reducing the opening and closing time of the clean room door and the lifter door. Product Parts Car A description of the transport agent transfer apparatus.

Document 1. Republic of Korea Patent Registration No. 10-0689072 (registered February 23, 2007)

The present invention uses the eccentric cam to simultaneously lift up and down the supports arranged in each corner region to move the feed rollers supported by the supports higher or lower or level than the roller conveyor installed in the clean room according to the cassette transfer point. The purpose of the present invention is to provide a transfer material transfer device and a cassette transfer material system for a display product using the same.

In order to solve the above problems, the transfer material transfer device according to the present invention,

Square bottom base;

A pair of first supports disposed at left front and rear corner regions of the four corner regions of the bottom base;

A pair of second supports disposed at right front and rear corner regions of the four corner regions of the bottom base;

A pair of first lifting bodies interposed between the bottom base and each of the first supports;

A pair of second lifting bodies interposed between the bottom base and each of the second supports;

First displacement means for raising and lowering each of the first lifting bodies up and down to adjust the vertical height of each of the first supports; And

Second displacement means for adjusting the height of each second support by raising and lowering each of the second lifting bodies;

Characterized in that consisting of.

On the other hand, in order to solve the above problems the component cassette conveyance transfer system for display products using the transfer material transfer apparatus according to the present invention,

A clean room formed at each floor of a display product manufacturing plant building and having an entrance;

A hoistway installed on one side or the center of the clean room over the entire floor of the manufacturing plant building;

A lifter car installed on the hoistway, the lifter having a door corresponding to an entrance of the clean room, and having a transfer device mounted thereon; And

A roller conveyor installed inside the clean room to convey the cassette, which is a transfer object, to the entrance side of the clean room;

Characterized in that consisting of.

Transfer material transfer device according to the present invention and a component cassette transfer material system for a display product using the same,

When the cassettes are loaded into the conveying rollers of the conveying device installed on the lifter in the hoistway in the clean room conveyor, the height of the conveying rollers is adjusted in three stages. When the cassette is taken out to the conveyor in the room, the height of the feed rollers is largely adjusted in three stages in the reverse order of the cassette loading, so that the cassette loading and unloading process can be performed stably.

1 is an exploded three-dimensional block diagram showing a conveyance transfer device according to the present invention,
2 is a three-dimensional configuration diagram of FIG.
Figure 3 is a three-dimensional configuration showing that the transfer means is provided in the transfer material apparatus according to the present invention,
4 is a three-dimensional configuration diagram for showing the support and the lifting guide, displacement sensor, etc.
5 is a plan view showing a power transmission structure of the driving unit;
6 is a cross-sectional configuration diagram showing the bottom base, the support, the lifting body and the displacement means;
7 is a cross-sectional configuration diagram showing the lifting guide,
8 is a view for showing the height of the support is adjusted in three stages when the eccentric cam position changes by the drive unit,
9 is a control block diagram of a controller;
10 is a side configuration view showing a transfer material system according to the present invention,
11 and 12 are views for showing the operating state of the transfer transfer device when the cassette is taken out and imported.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the configuration shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

The direction of the first support side is specified as the left side or the left side and the second support side is the right side or the right side based on FIG. 1, and the roller conveyor side is used as the front or front side, or lifter car based on FIG. 10. The direction is specified as the rear part or the back.

As shown in Figures 1 to 9, the conveyance transfer device (A) according to the present invention

The bottom base 10, the first support 20, the second support 30, the first lifting body 40, the second lifting body 50, the first displacement means 60, the second displacement means ( 70).

Looking at each configuration,

The bottom base 10

As shown in Figures 1 and 2,

It consists of a square structure by the horizontal and vertical frames are interconnected.

At this time, a plurality of legs 11 are provided on the bottom surface of the four corner regions of the bottom base 10, in consideration of the size and weight of the bottom base 10, the four corner regions of the bottom base 10 In addition, several legs 11 may be additionally provided.

And each of the legs 11 can be fixed to the mounting object to be used by the transfer material (A) of the present invention by a bolt or the like, such a mounting object is a lifter car (3) for cassette transfer material This is one example and can be installed in the device or place for carrying the various items.

The first support 20 is

As shown in Figures 1 to 4,

It is for supporting the conveying means which is disposed in the left front and rear corner areas of the bottom base 10 of the bottom base 10,

Square first support frame 21, and

First support plate 22 coupled to a portion of the upper circumference of the first support frame 21

Consists of including, a pair is provided.

At this time, the first support plate 22 is fixedly coupled to the first support frame 21 by a bolt or the like.

The second support 30

As shown in Figures 1 to 4,

It is for supporting the transfer means which is disposed in the right front and rear corner areas of the bottom base 10 and seated on the upper side together with the first support 20,

The second support frame 31 in a square, and

The second support plate 32 is coupled to a portion of the upper circumference of the second support frame 31

Consists of including, a pair is provided.

At this time, the second support plate 32 is fixedly coupled to the second support frame 31 by a bolt or the like.

As a result, the pair of first supports 20 and the pair of second supports 30 are configured to face each other from side to side.

The first lifting body 40 is

As shown in Figures 1 to 4, 6 to 8,

It is interposed between the bottom base 10 and each of the first support 20 to lift up and down,

First lifting plate 41 coupled to the lower surface of the first support frame 21 of each of the first support 20, and

The first elevating housing 42 of the hollow housing structure coupled to the lower surface of the first elevating plate 41.

Consists of including, a pair is provided.

The second lifting body 50

As shown in Figures 1 to 4, 6 to 8,

Interposed between the bottom base 10 and each of the second supports 30 to move up and down,

Second lifting plate 51 coupled to the lower surface of the second support frame 31 of each of the second support 30, and

The second elevating housing 52 of the hollow housing structure coupled to the lower surface of the second elevating plate 51.

Consists of including, a pair is provided.

As a result, the pair of first lifting bodies 40 and the pair of second lifting bodies 50 are configured to face each other from side to side.

The first displacement means 60A

As shown in Figures 1 to 8,

It is to adjust the vertical height of each of the first support 20 by raising and lowering each of the first lifting body 40 up and down,

A first guide plate 61 provided inside each of the first lifting bodies 40 and having a long hole 611 left and right,

A first shaft 62 having both ends of a first eccentric shaft 621 inserted into the long hole 611 of the first guide plate 61 in each of the first lifting bodies 40;

A first driving part 63 transmitting rotational power to the first shaft 62, and

First lifting and lowering to guide the vertical movement of the first guide plate 61 linked with the first eccentric shaft 621 is changed in position when the first shaft 62 is rotated by the first driving unit 63 Guide (64)

It is made, including.

The second displacement means 60B

As shown in Figures 1 to 8,

It is to adjust the vertical height of each of the second support 30 by raising and lowering the second lifting body 50 up and down,

A second guide plate 66 provided inside each of the second lifting bodies 50 and having a long hole 661 left and right,

A second shaft 67 having both ends of a second eccentric shaft 671 inserted into the long hole 661 of the second guide plate 61 in each of the second lifting bodies 50;

A second driving part 68 transmitting rotational power to the second shaft 67, and

A second lifting and lowering guide for vertical movement of the second guide plate 66 interlocked with the second eccentric shaft 671 which is changed in position when the second shaft 67 is rotated by the second driving part 68; Guide (69)

It is made, including.

In this case, as shown in FIG. 7, the lifting guides 64 and 69 are

A bottom post A1 having an inner guide space A11 fixedly installed on an upper surface of the bottom base 10 and having an upper opening;

A top post A2 disposed on the bottom post A1 and spaced apart from each other, fixed to a corresponding guide plate, and having a corresponding guide space A21 corresponding to the guide space A11 therein;

A lifting rod A3 having a lower end inserted into the guide space A11 of the bottom post A1 and an upper end inserted into the corresponding guide space A21 of the top post A2;

A stopper A4 coupled to an upper end of the lifting rod A3 to prevent upward departure of the top post A2.

Is made of.

The flange formed at the bottom of the bottom post A1 is fixedly coupled to the upper surface of the bottom base 10 by a bolt or the like, and the flange formed at the middle of the top post A2 is understood by the bolt or the like. 61 and 66 are fixedly coupled to each other, the top post A2 is also linked up and down together when the guide plates 61 and 66 are moved up and down, and are guided along the lifting rod A3 to move up and down. Ascend to.

As a result, when the respective eccentric shafts 621 and 671 are rotated when the shafts 62 and 67 are rotated, the lifting bodies 40 and 50 move up and down, and the lifting guides 64 and 69 Each lifting body (40, 50) is a vertical lifting operation.

As shown in FIG. 5, the driving units 63 and 68 may be

A driven gear (B1) axially coupled to the shaft,

A drive motor B3 installed on the bottom base 10 and having a drive gear B2;

A driving cover B4 covering and protecting the driven gear B1, the driving gear B2 and the driving motor B3 having the driven gear B1;

Is made of.

At this time, the driven gear (B1) and the drive gear (B2) is engaged with each other in a cross-axis gear structure, so that the driven gear (B1) is rotated when the drive gear (B2) rotates each of the shafts (62, 67) Will rotate.

On the other hand, the transfer material transfer device (A) according to the present invention

As shown in Figures 3, 4 and 9,

Top base 70 supported by each of the first support 20 and each of the second support 30,

A transfer means (80) installed on the top surface of the top base (70) to transfer the transfer object back and forth,

A plurality of object position detection sensor 90 for detecting the position of the transfer object is conveyed by the transfer means 80,

Displacement detection sensor 100 for sensing the above each guide plate (61, 66) in three phases up and down, and

The controller 110 receives the sensing value from the object position detecting sensor 90 and the displacement detecting sensor 100 to control the operation of each of the driving units 63 and 68.

It further includes.

At this time, the top base 70 has a rectangular structure formed by the horizontal and vertical frames are connected to each other.

In addition, the conveying means 80 is arranged in a row before and after the rollers rotated by a motor, these rollers are installed on the left and right upper surface of the top base 70.

In addition, the object position detecting sensor 90 is provided in a plurality of front and rear rows at both left and right ends of the top base 70 and is electrically connected to the controller 110.

And the displacement sensor 100 detects the position of the sensing object coupled to the lower surface of each of the elevating plate (41, 51), consisting of a sensor structure that detects three positions, large, upper, middle, lower, It is disposed in each of the elevating housing (42, 52) and is fixed to the bottom base 10, it is electrically connected to the controller (110).

More specifically, as shown in [a] of FIG. 8, the sensing object is in the lower position with each of the eccentric shafts 621 and 671 arranged side by side from the center of the shaft to the lower position. The displacement sensor 100 will detect,

As shown in [b] of FIG. 8, the sensing object is in an intermediate position with each of the eccentric shafts 621 and 671 arranged side by side from the center of the shaft, and the displacement sensing sensor 100 ) Will detect

As shown in [C] of FIG. 8, the sensing object is in an upper position with each of the eccentric shafts 621 and 671 arranged side by side from the center of the shaft to an upper position, and this position is referred to as the displacement detecting sensor 100. Will be detected.

On the other hand, the conveyance transfer device (A) having the above configuration can be applied to the system for transferring the transfer of parts cassette for display products, the display cassette parts transfer system for display products according to the present invention

As shown in FIG.

A clean room (1) formed on each floor of a building of a display product manufacturing plant and having an entrance (1a),

Elevation path (2) is installed over the entire floor of the manufacturing plant building on one side or the center of the clean room (1),

A lifter (3) installed on the hoistway (2) so as to elevate and having an entrance (3a) corresponding to the entrance (1a) of the clean room (1), and on which the conveyance transfer device (A) of the present invention is mounted;

A roller conveyor (4) installed inside the clean room (1) for conveying a cassette, which is a transfer object, to the entrance (1a) side of the clean room (1).

It is made, including.

At this time, the doorway (1a) of the clean room (1) is preferably provided with an opening and closing door, the opening and closing door and the door (3a) of the lifter 3 is to be opened and closed individually by external control. This means that each opening and closing operation can be selectively controlled individually so that the clean room 1 and the lifter 3 can be maintained in a clean area when the cassette, which is the object to be conveyed, is carried in and out.

The roller conveyor 4 has a conveyor structure capable of conveying a cassette, which is a conveying object, by rollers rotating by a motor drive.

The conveyance transfer system according to the present invention may further include a sub-roller conveyor (5) disposed between the conveyance transfer device (A) and the roller conveyor (4) and lift up and down together with the lifter (3). .

At this time, the sub-roller conveyor (5) is made of a conveyor structure capable of conveying the cassette, which is the object to be conveyed by the rollers rotated by the motor drive, is installed inside or outside the hoistway (2) is the lifter (3) Lifting power for the) is implemented to be transmitted to the sub-roller conveyor (5), thereby to move up and down with the lifter (3).

As a result, a stable conveyance operation for the cassette may be performed by arranging the space between the conveyance transfer device A and the roller conveyor 4 with the sub-roller conveyor 5 to fill the space.

Looking at the operating state of the transfer material transfer system according to the present invention made of the above configuration,

The cassette which is a conveying object carried by the roller conveyor 4 is moved to the conveying means 80 of the conveying transfer device A,

As shown in [a] of FIG. 8, since the respective eccentric shafts 621 and 671 are positioned side by side from the center of the shaft to the lower side, the respective lifting bodies 40 and 50 and the respective supports coupled thereto ( 20, 30 are in the lower position of the predetermined upper and lower loads, the transport means 80 is lower than the roller conveyor 4, at this time, to the conveying object carried by the roller conveyor (4) When about one third of the entire front and rear length is brought into the conveying means 80, the object position detecting sensor 90 senses this and transmits the sensing value to the controller 110. See drawings)

As shown in [b] of FIG. 8, the controller 110 receiving the sensing value controls and operates the driving units 63 and 68, thereby allowing the respective eccentric shafts 621 and 671 to operate on the corresponding shafts. By being positioned side by side in the center of the, the transfer means 80 is horizontally aligned with the roller conveyor (4), whereby each roller of the transfer means 80 is rotated. When about two-thirds of the front and rear lengths of the conveying object are brought into the conveying means 80, the object position detecting sensor 90 senses this and transmits the sensing value to the controller 110. See the middle drawing of 12)

As shown in [C] of FIG. 8, the controller 110, which has received the sensing value, controls and operates the driving units 63 and 68 so that each of the eccentric shafts 621 and 671 corresponds to the corresponding shaft. By being positioned side by side from the top to the top, the conveying means 80 is at a higher position than the roller conveyor 4, the operation of the conveying means 80 is stopped when the carry-in is completed, the conveying object The loaded lifter 3 is moved to the corresponding layer in which the next process for the object to be transported is prepared (see the top view of FIG. 12).

The above is the import process for the conveying object, and the following is the export process for the conveying object.

In the state where the lifter car 3 is stopped on the floor, the conveying means 80 is operated to be taken out to the side of the roller conveyor 4 provided on the floor. When it is taken out to the roller conveyor 4 side is detected by the object position sensor 90 and transmits this sensing value to the controller 110. (See the top and middle of Figure 11)

As shown in [b] of FIG. 8, the controller 110 receiving the sensing value controls and operates the driving units 63 and 68, thereby allowing the respective eccentric shafts 621 and 671 to operate on the corresponding shafts. By being positioned side by side in the center of the, the transfer means 80 is eventually aligned with the roller conveyor 4 and the horizontal position. When about two-thirds of the total length of the front and rear of the object to be conveyed is conveyed to the roller conveyor 4 side, the object position detection sensor 90 senses this and transmits the sensing value to the controller 110. See the middle drawing in FIG. 11)

As shown in [a] of FIG. 8, the controller 110, which has received the sensing value, operates by controlling the driving units 63 and 68, thereby allowing the respective eccentric shafts 621 and 671 to be operated. By being located side by side from the center to the bottom, the conveying means 80 is finally lower than the roller conveyor 4, the operation of the conveying means 80 is stopped (see the lower figure in Fig. 11). )

Therefore, as these operations continue smoothly and continuously, the carrying out and carrying out process of the cassette, which is the object to be conveyed, can be made stably.

In the above description of the present invention with reference to the accompanying drawings described with a specific shape and structure "conveyor transfer device and a component cassette conveyance transfer system for display products using the same", but the present invention various modifications and changes by those skilled in the art It is to be understood that such modifications and variations are intended to be included within the protection scope of the present invention.

10: bottom base
11: leg
20: First support
21: first support frame
22: first support plate
30: second support
31: second support frame
32: 2nd support plate
40: first lifting body
41: the first elevating plate
42: first lift housing
50: second lifting body
51: second lifting plate
52: 2nd hoist housing
60A: first displacement means
61: first guide plate
611: Longsmith
62: first shaft
621: first eccentric shaft
63: first driving unit
64: 1st lifting guide
60B: second displacement means
66: second guide plate
661: Longevity
67: second shaft
671: second eccentric shaft
68: second drive unit
69: 2nd lifting guide
70: top base
80: transfer means
90: object position sensor
100: displacement detection sensor
110: controller
1: Clean Room
1a: doorway
2: hoistway
3: lifter car
3a: door
4: Roller Conveyor
5: Sub Roller Conveyor

Claims (7)

Square bottom base 10;
A pair of first supports 20 disposed at left front and rear corner regions of the four corner regions of the bottom base 10;
A pair of second supports 30 disposed in the right front and back corner regions of the four corner regions of the bottom base 10;
A pair of first lifting bodies 40 interposed between the bottom base 10 and each of the first supports 20;
A pair of second lifting bodies (50) interposed between the bottom base (10) and each of the second supports (30);
First displacement means (60A) for raising and lowering each of the first lifting bodies 40 to adjust the height of the first support 20 up and down; And
Second displacement means (60B) for adjusting the height of each second support (30) by raising and lowering each of the second lifting bodies (50) up and down;
Consisting of
The first displacement means (60A) is provided in each of the first lifting body 40, the first guide plate 61 having a long hole 611 to the left and right, and in each of the first lifting body 40 A first shaft 62 having both ends of a first eccentric shaft 621 inserted into the long hole 611 of the first guide plate 61, and a first for transmitting rotational power to the first shaft 62 Vertical movement of the first guide plate 61 interlocked with the driving unit 63 and the first eccentric shaft 621 which is changed in position when the first shaft 62 is rotated by the first driving unit 63. Consists of the first elevating guide 64 to guide the
The second displacement means (60B) is provided in each of the second elevating body 50, the second guide plate 66 having a long hole 661 left and right, and in each of the second elevating body (50) A second shaft 67 having both ends of a second eccentric shaft 671 inserted into the long hole 661 of the second guide plate 66; and a second to transmit rotational power to the second shaft 67. Vertical movement of the second guide plate 66 interlocked with the driving unit 68 and the second eccentric shaft 671 which is changed in position when the second shaft 67 is rotated by the second driving unit 68. Consists of a second elevating guide (69) to guide the
Each of the elevating guides 64 and 69 is a bottom post A1 having an inner guide space A11 fixedly installed on an upper surface of the bottom base 10 and having an upper opening, and an upper portion of the bottom post A1. A top post A2 disposed to be spaced apart from each other and fixed to a corresponding guide plate, and having a corresponding guide space A21 corresponding to the guide space A11 therein, and a bottom post A1. Lifting rod (A3) is inserted into the guide space (A11) of the top and inserted into the corresponding guide space (A21) of the top post (A2), and coupled to the upper end of the lifting rod (A3) It is made of a stopper (A4) for preventing the upward departure of the post (A2),
A top base 70 supported by each of the first and second supports 20 and 30 and a transfer means 80 installed on an upper surface of the top base 10 to transfer the transfer target object back and forth; ), A plurality of object position detection sensors 90 for detecting the position of the transfer object to be conveyed by the conveying means 80, and each of the guide plates 61 and 66 for upper and lower three positions The controller 110 for controlling the operation of the drive unit (63, 68) by receiving the sensing value from the displacement sensor 100, the object position detection sensor 90 and the displacement sensor 100 to the Include,
Each of the first support 20 is formed of a first support frame 21 of a square, and a first support plate 22 coupled to a part of the periphery of the upper surface of the first support frame 21,
Each of the second support 30 is composed of a second support frame 31 of a square, and a second support plate 32 coupled to a part of the periphery of the upper surface of the second support frame 31,
Each of the first elevating bodies 40 includes a first elevating plate 41 coupled to a lower surface of the first support frame 21 of each of the first supports 20 and a lower portion of the first elevating plate 41. It is composed of the first lifting housing 42 of the hollow enclosure structure coupled to the face,
Each of the second elevating bodies 50 includes a second elevating plate 51 coupled to a lower surface of the second support frame 31 of each of the second supports 30 and a lower portion of the second elevating plate 51. The second lifting housing 52 of the hollow housing structure coupled to the surface,
Each of the first lifting body (40) and the second lifting body (50) is a carrier transfer device, characterized in that to form a structure facing each other from side to side.
delete delete delete delete A clean room 1 formed for each floor of a display product manufacturing factory building and having an entrance 1a;
A hoistway (2) installed on one side or the center of the clean room (1) over the entire floor of the manufacturing plant building;
A lifter (3) installed on the hoistway (2) so as to move up and down and having a door (3a) corresponding to the entrance (1a) of the clean room (1) and on which the conveyance transfer device (A) of claim 1 is mounted; And
A roller conveyor (4) installed inside the clean room (1) for conveying a cassette, which is a transfer object, to the entrance (1a) side of the clean room (1);
Consisting of,
By further including a sub-roller conveyor (5) disposed between the conveying transfer device (A) and the roller conveyor (4) and lifting up and down with the lifter (3), the conveying transfer device (A) and the As the sub-roller conveyor 5 is arranged to fill the spaces spaced between the roller conveyors 4, the cassette conveying material system for display products using a conveying material device, characterized in that a stable conveying operation for the cassette is possible. . delete

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