JP4737973B2 - Goods manufacturing factory - Google Patents

Description

  The present invention relates to a manufacturing factory for manufacturing articles such as liquid crystal televisions manufactured through a plurality of processes and using clean water in each process.

  A liquid crystal television provided with a liquid crystal panel as an image display unit is a step of manufacturing the original plate of the liquid crystal panel, a step of dividing the original plate into a predetermined size, and manufacturing a liquid crystal panel by applying predetermined processing to the peripheral portion. A process for manufacturing a liquid crystal module by assembling peripheral components such as a driver and bezel around the periphery of the LCD, a process for manufacturing a liquid crystal unit by assembling a backlight unit on one surface of the liquid crystal module, and a tuner circuit mounted on the liquid crystal unit The module is manufactured in order, and finally, assembly of television circuit parts such as an image processing circuit and a sound processing circuit is performed, and finishing assembly is performed for attaching exterior parts such as a cabinet and a speaker.

  Now, in the liquid crystal television manufacturing factory configured as described above, in-process processing using a lot of water is performed in a plurality of processes after the manufacturing process of the liquid crystal panel as well as the manufacturing process of the liquid crystal panel original plate. In addition, the use water is required to have a predetermined cleanliness depending on the purpose of use in each process. Such clean water is widely used in flat panel TV manufacturing factories and various semiconductor device manufacturing factories equipped with flat panels (plasma display panels, organic EL panels, etc.) other than liquid crystal panels as screen display units. The same is done in the manufacturing factories of articles, and in these manufacturing factories, it is anxious to achieve efficient use of water in each process while maintaining the cleanliness required in each process. ing.

In addition, as with the liquid crystal television manufacturing factory as described above, various proposals have been made regarding a semiconductor manufacturing factory that uses a large amount of water having high cleanliness (see, for example, Patent Documents 1 and 2). However, these are all related to the process layout, and are not intended to use water efficiently in each process.
JP 10-116758 A Japanese Patent Laid-Open No. 11-176712

  The use of water in an article manufacturing plant is generally carried out by distributing the water supply from the water supply source to the respective processes via separate water pipes. There is a problem that most of the water is discharged to the outside and the total amount of water used increases.

  In particular, in an article manufacturing factory where high cleanliness is required for water used in each process, such as the above-described LCD TV manufacturing factory, a large amount of water is used for purification treatment to achieve a desired cleanliness. In order to prevent environmental pollution caused by the discharge of used water, it is also necessary to purify the water before discharge to meet the demand for efficient use of clean water. difficult.

  This invention is made | formed in view of such a situation, The efficient use of the water in a some process is possible, and the cleanliness requested | required in each process does not require a huge purification load. An object of the present invention is to provide a manufacturing plant for articles that can be achieved.

  The manufacturing plant of the article according to the present invention is a manufacturing factory that manufactures an article through a plurality of processes using clean water, and the plurality of processes are the cleanliness of water used for processing in each process. Is divided into a plurality of regions according to the height of the main water channel that feeds the total amount of water used in the plurality of divided regions in order of the region, branched in the middle of the main water channel, A sub-water supply channel that supplies water to each of the plurality of regions, a water treatment unit that is provided in the sub-water channel, and purifies the used water in each region, and a part of the treated water by the water treatment unit Or a recirculation water channel that recirculates the whole to the main water supply channel.

  In the present invention, a plurality of steps for manufacturing articles are divided into regions according to the level of cleanliness of water used, and each sub-waterway branched from the main waterway is divided into each region. After that, water is used. Water used in each area is purified by water treatment means provided in each area, returned to the main water supply path via the reflux water channel, and then sent to the other areas via the branched sub-water supply channel. To recycle and reuse water efficiently. The region can be set including one or a plurality of steps.

  The article manufacturing plant according to the present invention is characterized in that the main water supply channel is provided to supply water in order from a region where the cleanliness of the water used is high to a region where the cleanliness is low.

  In the present invention, the water in the main water channel is fed in order from the region using the high clean water to the region using the low clean water through the respective sub water channels. The requirement for cleanliness of the water used is reliably met without increasing the load of the water treatment means provided in each region.

  Further, in the article manufacturing plant according to the present invention, the plurality of areas are divided into a hierarchy with an area where the cleanliness of the water used is high and a low area as the bottom, and the main waterway is from the upper hierarchy. It is characterized by having a configuration in which water is supplied to each region by flowing down to the lower level.

  In the present invention, a plurality of areas are divided into hierarchies depending on the level of cleanliness of the water used, and the water supply to each area by the main waterway is performed by natural flow, Reduce the load for water transmission.

  Furthermore, the article manufacturing plant according to the present invention provides a water treatment means for purifying the return water to the end of the main water passage, and a part or all of the water treated by the water treatment means is sent to the plurality of regions. In order to reuse the water supply, a circulation water channel returning to the start end of the main water supply channel is provided.

  In the present invention, the end and start of the main waterway are connected by a circulating waterway, the water used in each region is collected at the end of the main waterway and purified, and part or all of the water passes through the circulating waterway. Return to the beginning and reuse it to reduce the total amount of water required for efficient use. When part of the water is reused, the remaining water is discharged in a clean state to prevent contamination of the surrounding environment. Since the water treatment at the end of the main water supply channel is performed on the treated water by the water treatment means provided in each region, an excessive purification load is not required.

  In the article manufacturing plant according to the present invention, the water supplied by the main water supply channel is branched to the sub-water supply channel and distributed to each region, while the water used in each region is purified and returned. Since it returns to the main water channel through the water channel, it is possible to use water efficiently in the processes in each region by repeated use in a plurality of regions.

  Further, in the article manufacturing plant according to the present invention, the main water supply channel is provided in the order from the region using the high cleanliness water to the region using the low cleanliness water. In order from the lower region to the lower region, the requirement of cleanliness in each region can be easily satisfied without increasing the load of purification treatment in each region, and efficient use of water becomes possible.

  Further, in the article manufacturing plant according to the present invention, a plurality of areas are divided into hierarchies according to the level of cleanliness of water used, and water is supplied to each area by flowing from the upper hierarchy to the lower hierarchy. Since the main water channel for performing the above operation is provided, it is possible to use water efficiently while reducing the load for water transmission through the main water channel and the sub water channel.

  Furthermore, in the article manufacturing plant according to the present invention, the return water to the end of the main waterway is purified, and part or all of it is returned to the start end and reused, so the total amount of water required is greatly increased. Reduced and more efficient use of water. In addition, since the water discharged to the surrounding area is reduced and discharged in a purified state, the surrounding environment can be prevented from being polluted, and the water treatment at the end of the main waterway is performed by water treatment means provided in each area. Since it is performed on water, the present invention has an excellent effect that an excessive purification load becomes unnecessary.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a front view schematically showing the overall configuration of an article manufacturing factory according to the present invention, and FIG. 2 is a plan view of the same.

  The manufacturing plant for the articles shown in these figures is a manufacturing plant for liquid crystal televisions that are configured for integrated production of liquid crystal televisions that use liquid crystal panels for image display from the stage of the glass substrate that is carried as a raw material. The LCD building 1 and the TV building 2 are separated from each other, and are connected to each other via a master plate carry-in path 3. As shown in FIG. 2, a distribution warehouse 4 is provided between the LCD building 1 and the TV building 2, and is connected to the TV building 2 through a product carry-out path 5.

  The LCD building 1 is a building for an original plate manufacturing process for manufacturing a liquid crystal panel original plate. The original plate manufacturing process is the same as a conventional process in a liquid crystal panel manufacturing factory. Two glass substrates (mother glass) having substantially the same size are used. First, a TFT ( A liquid crystal driving element such as a thin film transistor is formed in an array shape, and a common electrode (ITO) and an alignment film are formed on the formation region to create an array substrate. On the other surface of the other glass substrate A color filter is formed in a pattern so as to correspond to each liquid crystal driving element, and a common electrode (ITO) and an alignment film are formed on the formation region via a protective film, and a color filter substrate (CF substrate) Create

  The drive element array and the color filter are respectively provided in a plurality of formation areas set on the surface of each glass substrate. FIG. 3 is an explanatory diagram of the manufacturing process of the liquid crystal panel original plate. In the array substrate shown in FIG. 3 (a), drive element arrays 11, 11,... Are arranged along two sides of each of four formation regions set by dividing the surface of the glass substrate 10. Are provided together with the lines 12, 12... And the gate lines 13, 13. Similarly, the CF substrate is provided with color filters 15, 15... Corresponding to the drive element arrays 11, 11... In the array substrate in each of the four formation areas set by dividing the surface of the glass substrate 14. It has been.

  Next, as shown in FIG. 3 (b), a seal agent is applied on the surface of the array substrate so as to surround the formation area of each drive element array 11, 11,. The CF substrate is positioned on the substrate so that the formation region of the drive element arrays 11, 11,... And the formation region of the color filters 15, 15,. As a result, a sealing space is formed between the array substrate and the CF substrate, which is surrounded by the seal edges 16, 16,... A liquid crystal panel original plate 18 having four liquid crystal panel areas 17, 17,... Is sealed as shown in FIG.

  The liquid crystal to be sealed may be introduced at any stage before and after the bonding of the array substrate and the CF substrate. The sealed liquid crystal is composed of the drive element arrays 11, 11,. Are arranged in a certain direction by the action of the alignment film covering the formation region of 15, 15,. The sealing edges 16, 16... That form the liquid crystal sealing space form an adhesive action between the array substrate and the CF substrate, and include conductive particles, so that the color filters 15, 15. It also serves as a lead-out line that pulls out the drive line to the array substrate side.

  In the LCD building 1, as shown in FIG. 1, a mother glass as a material is carried in, and after cleaning the mother glass, the array substrate and the CF substrate are created in parallel by the above-described procedure. As shown in FIG. 3, a liquid crystal panel original plate 18 is manufactured through a bonding process in which the prepared array substrate and CF substrate are bonded together under liquid crystal sealing.

  The LCD building 1 is divided into a plurality of floors, and the mother glass carried in as a raw material is once pulled up to the top floor and conveyed toward the lower floor as shown by arrows in FIG. The liquid crystal panel original plate 18 is manufactured through the above-described processes that proceed sequentially. The manufacturing process of the liquid crystal panel original plate 18 is a process in which the highest level of environmental cleanliness is required, and the inside of the LCD building 1 constitutes a clean room for each process, and a desired environmental cleanliness. Is to be obtained. The liquid crystal panel original plate 18 manufactured in this way is primarily divided into a predetermined size, and is carried into the TV building 2 through the original plate carry-in path 3 provided in the lower layer.

  The primary division that is the final process inside the LCD building 1 is performed in order to reduce the object to be carried into the TV building 2 and to reduce the size of the original plate carrying-in path 3, and as described above, the four liquid crystal panels In the case of the liquid crystal panel original plate 18 manufactured with the regions 17, 17..., As shown by a two-dot chain line in FIG. This is done so that areas 17 and 17 remain. This primary division may be performed so that the four liquid crystal panel areas 17, 17... Are separated one by one, but the liquid crystal panel original plate 18 manufactured in the LCD building 1 is the size of the liquid crystal panel to be finally obtained. Depending on the situation, there may be six, eight, or even more liquid crystal panel areas 17, 17 ..., and when all of these are separated for each liquid crystal panel area 17, 17 ..., There is a problem that the sizes of the objects to be conveyed in the original plate carry-in path 3 are diversified, and the conveyance system is complicated, for example, the number of types of conveyance trays is increased. By carrying out the primary division by limiting the number of divisions by the above-described two divisions or the like, the conveyance object can be miniaturized while avoiding the diversification of the sizes.

  The product carry-out path 5 is provided side by side with the original plate carry-in path 3 from the TV building 2 side, and is branched in the middle to communicate with the distribution warehouse 4. This product carry-out path 5 is provided to carry out products shipped from the TV building 2 as will be described later, and the carried-out products are temporarily stored in the distribution warehouse 4. Note that the parallel arrangement of the original plate carry-in path 3 and the product carry-out path 5 is a parallel arrangement as a structure in which the internal communication is blocked, and the original plate carry-in path 3 is affected by the product conveyed in the product carry-out path 5. And the cleanliness of the LCD building 1 and the TV building 2 communicated therewith is not reduced.

  In the TV building 2, a first step of manufacturing a liquid crystal panel using the liquid crystal panel original plate 18 carried in from the original plate carry-in path 3, a second step of manufacturing a liquid crystal module using the liquid crystal panel which is the product of the first step. A third step of manufacturing a liquid crystal unit using a liquid crystal module as a product of the second step, a fourth step of manufacturing a television module using a liquid crystal module as a product of the third step, and a product of the fourth step. A fifth step of manufacturing a liquid crystal television as a final product is performed in this order using a certain television module.

  The original plate carrying-in path 3 is connected to the second floor of the TV building 2 and further extended to the fifth floor, which is the top floor. The liquid crystal panel original plate 18 carried into the TV building 2 is indicated by an arrow in FIG. As indicated by the reference numeral, the liquid crystal television is manufactured through the first to fifth steps which are performed while being lifted up to the fifth floor and conveyed toward the lower level.

  In the first to fifth steps performed in the TV building 2, a lot of water is used. As shown in FIG. 1, the inside of the TV building 2 is divided into five layers. In this hierarchical division, the first to fifth steps are divided into regions according to the level of cleanliness required for each water used, and the region requiring the highest cleanliness is the highest layer, It moves to the lower hierarchy in order of decreasing cleanliness of the required water used. Here, the cleanliness required for the water used for the in-process treatment of the first to fifth steps is highest in the first step as described later, and lowers with the progress of the following steps. In the TV building 2, the first process area using the cleanest water is the fifth floor, the fourth floor is the second process area, the third floor is the third and fourth processes. The fifth step, which is an implementation area and is the final step and has low cleanliness required for the water used, is performed separately on the second floor and the first floor for reasons described later.

  FIG. 4 is an explanatory diagram showing the configuration of the water system inside the TV building 2 for enabling the use of water as described above. As shown in the figure, in the TV building 2, a drainage tank 6a installed on the basement floor and a water receiving tank 6b installed on the rooftop floor are connected by an upward circulation water channel 61 and a downward main water supply channel 62. The water supply means that the water pumped up from the drainage tank 6a to the water receiving tank 6b by the operation of the water supply pump 60 interposed in the middle of the circulation channel 61 is supplied to the inside of the main water supply path 62 by natural flow and returned to the drainage tank 6a. Is configured.

  In addition, the drainage tank 6a and the water receiving tank 6b are provided with a water treatment device capable of high-level purification treatment, and water supply from the water receiving tank 6b to the main water supply channel 62 is performed by two-stage purification by the water treatment device. It is made with high cleanliness. A part of the return water to the drain tank 6a is replaced with water separately taken from the outside, and is drained to the outside after sufficient purification treatment.

  The main water channel 62 is extended from the fifth floor to the first floor inside the TV building 2. Each level of the TV building 2 has a sub-water channel 63 branched from the middle of the main water channel 62 at each height, and part of the water flowing down in the main water channel 62 is It is designed to be branched and fed at each level via each separate sub-water channel 63.

  The sub-water channel 63 is laid so as to go to the necessary places of the respective levels, and water supply ports and drain ports are opened at one or a plurality of locations. As a result, the water supplied to each level by the sub-water supply channel 63 is sent through each water supply port, and after being used for in-process treatment as described later, the water in the sub-water supply channel 63 is passed through each water discharge port. To be collected.

  The end of the sub-water channel 63 of each level is connected to a reflux channel 64 communicating with the main water channel 62 via a water purifier 65 configured to be capable of simple purification treatment. The used water collected in the water channel 63 is mixed with unused water in the sub-water channel 63, purified by passing through the water purifier 65, and returned to the main water channel 62 via the reflux channel 64, It is fed to the lower level, branched and fed to the sub-water channel 63 laid on this level, and used in the same way.

  With the above water system configuration, in each level of the TV building 2, water branched and fed from the main water channel 62 to each sub-water channel 63 can be used, and the used water is the reflux channel. Since it is returned to the main waterway 62 via 64 and reused on the lower floor, the total amount of water used in the entire TV building 2 can be greatly reduced. In addition, most of the water in the main transmission channel 63 is circulated and used by two-stage water treatment in the drainage tank 6a and the receiving tank 6b. It is possible to efficiently use water that is required in large quantities throughout.

  Moreover, the highest cleanliness is required for the water used in each level of the TV building 2 on the fifth floor, which is the highest level. In the irrigation system shown in FIG. 5, the entire amount of water used is sent to the water receiving tank 6b, and the water branched from the middle of the main water channel 62 extending from the fifth floor to the first floor is used at each level. Therefore, it is possible to supply sufficiently clean water to the first step performed on the fifth floor, which is the top floor, and water is supplied by natural flow in the main water supply channel 62. The power burden for the can be kept small.

  In addition, since the water returned to the main water channel 62 at each level is water purified by the water purifier 65, a predetermined cleanliness level is ensured for water repeatedly used at each level from the 4th floor to the 1st floor. can do. Furthermore, the cleanliness required for the water used at each level may be lower or equivalent to that of the upper level, and the water purifier 65 provided at the end of the sub-water channel 63 at each level has high purification performance. It is possible to have a simple configuration without having an excessive purification load. In addition, the terminal of the sub-floor channel 63 on the first floor, which is the lowest floor, is directly connected to the main water channel 62 through the reflux channel 64 without going through the water purifier 65, and the drainage from the first floor is a drainage tank. It is designed to be cleaned by a water treatment device provided at 6a.

  Next, the 1st-5th process performed in the 5th floor-the 1st floor is demonstrated in order of a process. On the fifth floor, the first step of manufacturing a liquid crystal panel using the liquid crystal panel original 18 carried in from the LCD building 1 is performed. FIG. 5 is an explanatory diagram of the manufacturing process of the liquid crystal panel which is the first process.

  As shown in FIG. 5A, the liquid crystal panel original plate 18 has a plurality (two in the figure) of liquid crystal panel areas 17, 17... In the first step. Is divided for each of the liquid crystal panel areas 17, 17... Next, as shown in FIG. 5 (b), the divided liquid crystal panel original plate 18a is washed, and finally, as shown in FIG. 5 (c). As shown in the figure, optical sheets 18b and 18b are attached (attached) to both surfaces of the cleaned panel original plate 18a, and the liquid crystal panel 19 is manufactured as shown in FIG. 5 (d).

  The optical sheets 18b and 18b are formed by selecting and laminating sheets having various optical functions such as a polarizing sheet, a field-of-view expansion sheet, an antireflection sheet, and the like according to applications. These optical sheets 18b , 18b after sticking, in order to suck and remove the air bubbles left on the sticking surface, an autoclave treatment is performed by evacuation at high temperature. In order to stabilize, the aging process exposed to high temperature for a predetermined time is performed.

  In the in-process treatment in the first process as described above, a large amount of water having a very high cleanliness is used particularly for cleaning the panel original plate 18a before the optical sheets 18b and 18b are bonded. As described above, the water supplied to the fifth floor where the first process is carried out via the sub-water supply channel 63 is the water purified in two stages by the water treatment apparatus attached to the drainage tank 6a and the water receiving tank 6b. Yes, it can be used without any problem for in-process processing of the first step including the cleaning.

  The liquid crystal panel 19 manufactured in such an environment is subjected to an SL inspection for visually inspecting whether the optical sheets 18b and 18b are attached in a subsequent inspection unit, and then an arrow mark in FIG. As shown in the figure, it is carried out to the fourth floor or shipped outside the factory as an intermediate product. The same intermediate product is shipped at the end of the second to fourth steps performed on the fourth and third floors. These intermediate products, together with the final product (liquid crystal television) completed through the fifth step on the second floor, are once transported to the first floor for packing as shown by the arrows in FIG. It is returned to the second floor and collected in the distribution warehouse 4 via the product carry-out path 5. The distribution warehouse 4 is an automatic warehouse in which a predetermined storage space is secured for each of the intermediate product and the final product manufactured on each floor, and the products collected in the distribution warehouse 4 are temporarily stored in each storage space. Stored, paid out according to a shipping plan based on an order from the outside, and shipped outside the factory.

  On the fourth floor, a second step of manufacturing a liquid crystal module using the liquid crystal panel 19 carried in from the fifth floor is performed. In the second step, first, terminal exposure and chamfering are performed. FIG. 6 is an explanatory view of the terminal exposure and chamfering process, and is a cross-sectional view showing an enlarged peripheral portion of the liquid crystal panel 19.

  The liquid crystal panel 19 faces the array substrate 19a on which the drive element array 11 is formed and the CF substrate 19b on which the color filter 15 is formed, and seals the liquid crystal 19c in the sealing space by the seal edge 16, The configuration is as shown in FIG. The array substrate 19a is provided with a source line 12 (and a gate line 13) which is located outside the seal edge 16 and connected to the drive element array 11, and the terminal exposure in the second process is performed on the CF substrate 19b. The peripheral portion is cut out over a predetermined width outside the seal edge 16 to expose the source line 12 (or the gate line 13). FIG. 6B shows a state after the terminal exposure, and a portion indicated by a two-dot chain line in the drawing is cut off.

  In addition, the chamfering is performed by using the edge of the CF substrate 19b cut out for exposing the terminal together with the edge of the array substrate 19a. This is a chamfering process as shown in FIG. 6B, and is performed by polishing or heating in order to prevent problems such as chipping and cracking during the handling of the liquid crystal panel 19 in subsequent steps.

  After such terminal exposure and chamfering, a driver (source driver and gate driver) is mounted on the source line 12 and gate line 13 exposed as described above, and a frame for protecting these mounting portions. A liquid crystal module is manufactured by attaching a bezel. At this time, the liquid crystal control board is also attached, and if necessary, an aging process is performed to stabilize the characteristics of the liquid crystal and the circuit.

  In the in-process treatment in the second process as described above, water having a high cleanliness is used for cooling at the time of terminal exposure and chamfering and supplying to the aging tank. As described above, the water supplied to the fourth floor where the second process is carried out via the auxiliary water channel 63 is the water purified in two stages by the water treatment apparatus attached to the drainage tank 6a and the water receiving tank 6b. Used in the first process on the 5th floor, is mixed water with the water that has been refluxed through simple purification by the water purifier 65, and is required for in-process treatment in the second process where the required cleanliness is lower than the first process. Can be used without problems.

  After the liquid crystal module manufactured in this manner is subjected to an operation test for confirming the quality of the operation state in the subsequent inspection unit, the liquid crystal module is carried out to the third floor as in the liquid crystal panel manufactured in the first step, or in the middle. Shipped as a product outside the factory. This shipment is made to a manufacturing factory of a liquid crystal unit or a television module and various devices on which these are mounted, and also to other factories that manufacture liquid crystal televisions.

  On the third floor, a third step of manufacturing a liquid crystal unit using the liquid crystal module carried in from the fourth floor and a fourth step of manufacturing a television module using the liquid crystal unit manufactured in the third step are performed. .

  The liquid crystal unit is manufactured by assembling the backlight unit to the liquid crystal module manufactured in the second step. The backlight unit includes, for example, a light source such as a cold cathode fluorescent tube, a light guide plate that equalizes and emits light emitted from the light source over the entire surface, and an optical sheet (light diffusion sheet) that is attached to the output surface of the light guide plate. And a prism sheet, etc.) and is necessary for irradiating the liquid crystal panel with light from the array substrate side so that the display image of the liquid crystal panel can be visually recognized. The third process may include an assembly process of such a backlight unit.

  Part of the liquid crystal unit manufactured in this way is sent to the subsequent inspection section without going through the fourth step after the aging process, and after operation and appearance inspection, it is shipped out of the factory as an intermediate product. The This shipment is made to a manufacturing factory of various devices that use the liquid crystal unit as a display means.

  The television module is manufactured by mounting a tuner on the liquid crystal unit manufactured in the third step and mounting a control board that drives a driver. The television module manufactured in this way is subjected to an aging process if necessary, and after performing operation and appearance inspection in a subsequent inspection unit, it is carried out to the second floor or shipped outside the factory as an intermediate product. This shipment is made to other factories that manufacture liquid crystal televisions.

  In the in-process treatment in the third and fourth steps as described above, water having a predetermined cleanliness is used particularly for supply to an aging tank for aging treatment. As described above, the water supplied to the third floor where the third and fourth steps are carried out via the sub-water supply channel 63 is purified in two stages by the water treatment devices attached to the drainage tank 6a and the water receiving tank 6b. Clean water required in the 1st process on the 5th floor and the 2nd process on the 4th floor, and returned to the water after simple purification by the water purifiers 65, 65 at each floor. However, it can be used without problems in the in-process processing of the third and fourth steps, which are lower than the first and second steps.

  On the second floor and the first floor, the fifth step of manufacturing the liquid crystal television is performed. This process includes a television circuit board mounting process, and the liquid crystal television is manufactured by assembling a television circuit board to a television module carried in from the third floor and further attaching exterior members such as cabinets and speakers.

  The television circuit board includes various processing circuits necessary for operation as a television, such as a signal processing circuit that processes video signals and audio signals given from a tuner, and a remote control circuit that receives and processes operation signals given from an operation remote controller. I have. In the mounting process of the television circuit board, various mounting parts are used, and since high positioning accuracy is required for soldering these mounting parts, this mounting process is performed on the first floor. This completes the decrease in cleanliness due to contact with the outside when the mounted components are brought in on the first floor, and minimizes the impact on the environmental cleanliness required for other in-process processing performed on the second floor. Can keep. In addition, the effect of floor vibration on the positioning accuracy of mounted components can be minimized by implementation on the first floor.

  The liquid crystal television manufactured in this way is subjected to a final aging process in order to stabilize the characteristics of all the circuits and liquid crystals, and after the final inspection is performed in the subsequent inspection unit, it is shipped as a final product. The final inspection includes electrical adjustment, operation, and appearance inspection, and the operation inspection is performed under various environments assumed in use conditions such as temperature, humidity, vibration, etc., to improve reliability. .

  In the in-process treatment in the fifth step as described above, water having a predetermined cleanliness is used for supplying to the aging tank for aging treatment and for final operation inspection. As described above, the water supplied to the second floor and the first floor where the fifth step is carried out via the respective sub-water supply channels 63, 63 is supplied by the water treatment apparatus attached to the drainage tank 6a and the water receiving tank 6b. The water purified in stages and used in the 1st process on the 5th floor, the 2nd process on the 4th floor, and the 3rd and 4th processes on the 3rd floor, and returned through simple purification by the water purifiers 65, 65. It can be used for the in-process treatment of the 5th process in which the required cleanliness is lower than the 1st-4th process, without a problem.

  Since the article manufacturing plant configured as described above has a water supply system configured as shown in FIG. 4, the total amount of water used in the entire TV building 2 is greatly reduced, and water in a plurality of steps is obtained. Efficient use of water can be achieved without the need for a large water supply load, and furthermore, water having the required cleanliness can be ensured in each process without requiring a large amount of purification load. Can be achieved.

  In addition, the above water system is divided into regions according to the cleanliness of water used in a plurality of processes, and even in factories where these regions are arranged in a plane, the factorized factory shown in the embodiment In addition to the liquid crystal television manufacturing factory described in the embodiment, the present invention can also be applied to a flat panel television manufacturing factory including a flat panel such as a plasma display panel or an organic EL panel as a screen display unit. Furthermore, the present invention can be applied to a manufacturing factory for articles using clean water in a plurality of processes, such as a semiconductor device manufacturing factory, and it goes without saying that the same effect can be obtained.

It is a front view which shows typically the whole structure of the manufacturing factory of the articles | goods which concern on this invention. It is a top view which shows typically the whole structure of the manufacturing factory of the articles | goods concerning this invention. It is explanatory drawing of the manufacturing process of a liquid crystal panel original plate. It is explanatory drawing which shows the structure of the irrigation system inside TV building. It is explanatory drawing of the manufacturing process of the liquid crystal panel which is a 1st process. It is explanatory drawing of the terminal exposure process included in a 2nd process.

Explanation of symbols

1 LCD building 2 TV building
61 Circulating waterway
62 Main waterway
63 Secondary waterway
64 Reflux channel
65 water purifier

Claims (4)

In a manufacturing plant that manufactures articles through multiple processes that use clean water,
The plurality of steps are divided into a plurality of regions according to the level of cleanliness of water used for processing in each step,
A main water channel that feeds the total amount of water used in the plurality of divided areas in the order of the areas;
A sub-waterway that branches off in the middle of the main waterway and that feeds water to each of the plurality of areas;
A water treatment means for purifying the water used in each region provided in the sub-water supply channel;
And a reflux water channel for returning a part or all of the water treated by the water treatment means to the main water channel.   The article manufacturing plant according to claim 1, wherein the main water supply channel is provided to supply water in order from a region where the cleanliness of the water used is high to a region where the cleanliness is low.   The plurality of areas are divided into a hierarchy with an area where the cleanliness of the water used is high above and a low area below, and the main water channel is a water supply to each area by flowing down from the upper hierarchy to the lower hierarchy 2. The article manufacturing plant according to claim 1, wherein Water treatment means for purifying the return water to the end of the main water channel;
A circulating water channel that returns to the start end of the main water channel so that a part or all of the water treated by the water treatment means can be reused for feeding to the plurality of regions. A manufacturing plant for the article according to one.

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