JP4456099B2 - Manufacturing method of LCD module housing and LCD module housing manufactured thereby - Google Patents

Description

  The present invention relates to a method for manufacturing a housing for an LCD module (hereinafter referred to as an LCD module housing) and an LCD module housing manufactured thereby, and more particularly, simplifies the manufacturing process of the LCD module housing and consumes unnecessary materials. The present invention relates to an LCD module housing manufacturing method and an LCD module housing manufactured thereby, which can dramatically improve productivity as compared to existing production methods.

  In general, the LCD module housing plays a role of supporting the LCD module by an outer portion of the LCD module to which a liquid crystal display panel (LCD panel) is attached. This is a part also referred to as a top chassis, a bezel frame, or the like. Such an LCD module housing is made of a metallic material and must be precisely manufactured so as to surround the outside of the LCD module by a mold operation. The LCD module housing is described in, for example, Patent Document 1.

  Conventionally, the mold work of the LCD module housing is manufactured through various complicated processes. An example of the manufacturing process of the conventional LCD module housing will be described with reference to FIG. FIG. 6 is a diagram illustrating a conventional method of manufacturing an LCD module housing. These steps are performed in the order of steps as shown in FIGS. That is, the manufacturing process of the conventional LCD module housing requires one mold frame for each progressing process, and is performed through such a single mold. The conventional manufacturing process will be specifically described as follows.

  Using a flat steel plate wound in a roll shape, this is drawn into the first mold machine. Thereby, the compound work is performed as a primary process. And the flat plate 2 shown by Fig.6 (a) is formed. In the compounding step, press working is performed by the first mold machine while drawing a flat steel plate wound in a roll shape in a flat state. Thereby, the flat plate 2 is cut out so as to fit the size of the LCD module. In this compounding process, blanking, piercing, notching, and other processes are simultaneously performed in a single work process.

  After the compounding process for machining the rectangular flat plate 2 shown in FIG. 6A by the first mold machine is completed, the secondary process is subsequently performed using the second mold machine. In the secondary process, piercing, embossing, burring and the like are performed. Thereby, it becomes a structure as shown in FIG.6 (b).

  Subsequently, in FIG. 6 (b), the piercing, embossing, and burring processed flat plate 2 is subsequently proceeded simultaneously with L bending and Z bending so as to be folded in one direction using a third mold machine. To do. Here, the L-bending is performed so as to surround the outer surface of the LCD module. Z-bending is performed by pressing so that the LCD module can be pressed inward when the LCD module is mounted. Thereby, the entire surface of the LCD module is fixed in close contact with the outer side. That is, the LCD module housing Z-bent by the mold is fixed so that the entire surface of the LCD module is in close contact. For this reason, when there is no bending portion, the fixing force to the LCD module is weakened, and thus the above work process must be processed precisely. Thereby, it becomes a structure as shown in FIG.6 (c).

  When the L-bending and Z-bending steps are completed as shown in FIG. 6 (c), as shown in FIG. 1 (d), a portion that has been L-bent and Z-bent using the fourth mold machine. A bezel piercing process is performed to remove the unnecessary central flat plate 4 inside the flat plate 2 except for. Thereby, the rectangular frame 6 is formed, and when the LCD module is mounted, the front surface of the LCD module can be seen.

  When the bezel piercing process performed in the process of FIG. 6D is completed, unnecessary portions remaining in the bezel piercing process by the fourth mold machine, that is, unnecessary portions that are pressed by the mold are unnecessary. Remove metal debris from the surface. Then, a tapping process is performed on the rectangular frame 6 by using a fifth mold machine so that it can be coupled using screws or the like. Thereby, it becomes a structure as shown in FIG.6 (e).

  When the tapping process and the like are completed through the above-described mold process, the finishing process is finely performed using a sixth mold machine. Thereby, it becomes a structure as shown in FIG.6 (f). In this way, a desired LCD module housing (rectangular frame 6) is manufactured.

  The conventional method of manufacturing an LCD module housing having such complicated processes must be performed using at least six expensive mold machines. In particular, from the viewpoint of capital investment, when a large amount of expensive mold machines must be provided, the investment cost becomes very high. Furthermore, using a large number of mold machines, a mold that matches the external shape of each LCD module must be introduced to suit the work process, and there are many workers who should operate or manage the mold. Has the necessary problems. Further, in the process of FIG. 6D, unnecessary parts must be pierced in order to make a frame that fixes only the frame except the part where the LCD module is seated and the front of the module can be seen. . That is, an unnecessary portion of the inner rectangular shape must be discarded by press cutting. In this case, there is a problem that an unnecessary portion is larger than the frame. Moreover, although the part taken in this way is recycled, it is necessary to perform further flat plate processing at the time of recycling. That is, there is a problem that a work process is added.

Further, in the conventional method for manufacturing an LCD module housing, not only a large amount of mold machines are required, but also a moving robot for transferring a workpiece from one mold machine to the next mold machine. Required between mold machines. For this reason, there is a problem that a large amount of capital investment is required. In addition, there is a problem that the management cost increases while being used. Furthermore, in order to obtain the rectangular frame 6 with the inner side opened, the inner side has to be cut and discarded, which causes a problem that a large amount of steel plate material is required.
Japanese Patent Laid-Open No. 10-68932

  The present invention has been devised in view of the conventional problems as described above, and is an LCD module housing that simplifies the process of manufacturing an LCD module housing and eliminates waste of materials. An object of the present invention is to provide a manufacturing method and an LCD module housing using the same.

Method of manufacturing a housing for such a LCD module to the invention, by using a mold of the progressive type, while pressing continuously the housing frame for the LCD module linearly so as to have a notch for folding, at the same time the width A step of manufacturing a linear frame that is bent in a direction, a bending step of bending the linear frame into a horizontal frame portion and a vertical frame portion with respect to the notch for folding, and bending A welding step in which two sets of linear frames are brought into contact with each other so as to form a rectangular frame, and then end portions in contact with each other are fixed together. This simplifies the process for manufacturing the LCD module housing and eliminates waste of materials.

For LCD module housing according to the present invention, there is provided a housing for an LCD module manufactured by the manufacturing method of the housing for the above LCD module, formed by the notch for folding before reporting, a set of linked together, respectively Both ends of the vertical frame portion and the horizontal frame portion and the opposite ends of the other set of the horizontal frame portion and the vertical frame portion are welded together to form a rectangular frame fixed integrally. Thereby, the interference of the folding part when it folds at right angles can be suppressed.

  Moreover, the hole part may be formed in said notch part for folding. Thereby, the process defect of a folding part can be suppressed.

  And said hole part may be formed in the inner side end of the said notch part for folding.

  The LCD module housing is laser welded in a state where both ends of the one set of the vertical frame portion and the horizontal frame portion are in contact with both ends of the other frame of the horizontal frame portion and the vertical frame portion. Thus, the whole surface or the top surface may be welded and fixed integrally. By laser welding, the fixing force is good, the welding surface is clean, and the fixing operation can proceed quickly.

  According to the present invention, the process for manufacturing the LCD module housing can be simplified and the waste of materials can be eliminated.

Embodiment.
A manufacturing method of an LCD module housing (hereinafter referred to as an LCD module housing) according to the present invention and an LCD module housing using the same will be described in detail below with reference to FIGS. FIG. 1 is a plan view showing a configuration of a linear frame processed by a progressive type mold in relation to a method for manufacturing an LCD module housing of the present invention. FIG. 2 is a diagram illustrating a method for manufacturing an LCD module housing manufactured using a linear frame, with respect to the method for manufacturing an LCD module housing of the present invention. 3 to 5 are views showing a method of manufacturing an LCD module housing according to another embodiment of the present invention.

  In the present invention, for example, using only one pair of progressive molds, the LCD module housing frame is pressed continuously in a straight line as shown in FIG. Thereby, the linear frames 20a and 20b are manufactured. In the case of pressing with such a progressive mold, the linear frames 20a and 20b can be manufactured at a production rate of about 60 to 300 pieces per minute depending on the performance of the press. At this time, as shown in FIG. 2A, blanking, notching and piercing are performed on the linear frames 20a and 20b processed by the mold. In the progressive mold process of the present invention, L bending and Z bending are simultaneously performed in the width direction of the linear frames 20a and 20b.

  The straight frames 20a and 20b processed in this way are transferred to the next step using a transfer means such as a belt conveyor, and are bent at right angles by a bending machine or the like as shown in FIG. Folding is performed (bending process). Further, as shown in FIG. 2 (a), folding notches 26 are formed on one side surface at predetermined portions in the longitudinal direction of the linear frames 20a and 20b. This is formed in order to suppress interference at the folding portion when the linear frames 20a and 20b are folded at right angles during folding. As a result, the straight frames 20a and 20b are smoothly folded at a right angle to form the integrally connected vertical frame portion 22 and horizontal frame portion 21. As described above, after the linear frames 20a and 20b are folded so as to form the vertical frame portion 22 and the horizontal frame portion 21, as shown in FIG. The horizontal frame 21 is placed so that both ends thereof are in contact with each other to form the rectangular frame 30. That is, as shown in FIG. 2B, two frames of the vertical frame portion 22 and the horizontal frame portion 21 formed by folding the linear frames 20a and 20b into an L shape by folding are formed as shown in FIG. As shown in c), one set of horizontal frame portions 21 is an end portion of another set of vertical frame portions 22, and one set of vertical frame portions 22 is an end portion of another set of horizontal frame portions 21. Place them so that they touch each other. And the surface to contact | abut is fixed integrally by a coupling means. That is, both ends of one set of the vertical frame portion 22 and the horizontal frame portion 21 are fixed to both ends of the other set of the vertical frame portion 22 and the horizontal frame portion 21. In addition, when laser welding is employed as a coupling means between both ends of the vertical frame portion 22 and the horizontal frame portion 21, for example, the fixing force is better than other coupling means, the welding surface is clean, and the speed is high. Fixing work can proceed. As shown in FIG. 2D, the ends of the vertical frame portion 22 and the horizontal frame portion 21 of the pair of linear frames 20a and 20b are made rectangular by a coupling means such as laser welding as described above. It is fixed integrally. Thereby, the rectangular frame 30 (LCD module housing) is formed. As described above, according to the manufacturing method of the LCD module housing according to the present invention, the production amount of the rectangular frame 30 is greatly increased by adding the welding operation step for coupling between the frames as compared with the prior art. be able to.

  That is, a large amount of the linear frames 20a and 20b are processed using a progressive mold, and at the same time, the linear frames 20a and 20b are folded, and the rectangular frame 30 is manufactured by a coupling means such as laser welding. For this reason, a manufacturing process can be simplified and productivity can be increased greatly. Therefore, in the method of manufacturing the LCD module housing as described above, in particular, since the straight frames 20a and 20b are continuously driven out using only one pair of progressive molds, existing pairs of molds are used. It can be processed at a production speed much faster than the method. In particular, according to the present invention, the folding notch 26 formed so that the straight frames 20a and 20b are smoothly folded at right angles is formed, so that the folding can be easily performed using a bending machine. it can. That is, the linear frames 20a and 20b can be bent at right angles by a bending machine with reference to the folding cutout portions 26 formed on the linear frames 20a and 20b. For this reason, the vertical frame part 22 and the horizontal frame part 21 as shown in FIG. 2B are easily formed.

  Further, although there is no problem even if the bending process is performed using only the folding notch 26 as described above, the end (inner end) of the folding notch 26 for performing the bending work more effectively. A circular hole 28 is formed in the plate. In this case, it is possible to minimize the number of surfaces that come into contact with each other while folding the inner end of the folding notch 26 during bending, so that it is possible to suppress the processing failure of the folded portion. That is, when the folding notch 26 is folded, the inner side touches the outer side earlier than the outer side, thereby preventing problems such as the inner side from touching and being broken by mistake. In the present embodiment, the circular hole 28 is formed. However, the present invention is not limited to this, and various shapes of the hole 28 can be formed.

  On the other hand, since the linear frames 20a and 20b are directly chamfered using a progressive mold, the speed of the blanking process in the mold can be increased. In addition, after the linear frames 20a and 20b are bent to form the horizontal frame portion 21 and the vertical frame portion 22, in the next step, two sets of the horizontal frame portion 21 and the vertical frame portion 22 are formed by a coupling means such as laser welding. The both ends of each are welded and fixed to each other. Thereby, the rectangular frame structure of a smooth shape can be manufactured easily.

  On the other hand, as shown in FIGS. 3 and 4, when the linear frames 20a and 20b are driven out by a progressive mold, a large number of folding notches 26 are formed and the folded portions are folded in multiple stages. It may be formed. And it cannot be overemphasized that the rectangular frame 30 can be manufactured by mutually fixing a contact part (coupling | bond part 29) integrally by coupling means, such as laser welding. At this time, when performing full-surface welding on the two coupling portions 29 and performing top surface welding on the four folding portions by the folding notch portions 26, the rectangular frame 30 with a reinforced fixing force can be manufactured. That is, when the linear frames 20a and 20b are folded in multiple stages to form the rectangular frame 30, a set of the vertical frame portion 22 and the horizontal frame portion 21 and another set of the vertical frame portion 22 and the horizontal frame portion 21 Although only the joint portion 29 between the end portions may be laser-welded, it is preferable that the folding portion by the folding notch portion 26 is similarly laser-welded. Thereby, the reinforcement force of a folding part increases and the still stronger rectangular frame 30 can be provided.

  On the other hand, as shown in FIG. 5, the hole 28 can also be formed at a boundary portion that is bent when the linear frames 20 a and 20 b are bent to L (see FIG. 5A). That is, in the present embodiment, an elliptical hole 28 is formed at the inner end of the folding notch 26. Then, the linear frames 20a and 20b are bent so that the boundary portion to be folded passes through the hole 28 at the time of L bending. Thereafter, as shown in FIG. 5B, the linear frames 20a and 20b are folded at a right angle with the folding notch 26 as a reference. Thereby, the vertical frame portion 22 and the horizontal frame portion 21 are easily formed, and at the same time, the hole portion 28 is formed substantially at the boundary portion between the upper surface and the side surface of the linear frames 20a and 20b. In the present embodiment, the length of the ellipse in the minor axis direction is extremely small compared to the length in the major axis direction. Therefore, when the linear frames 20a and 20b are folded with reference to the folding notch 26, the size of the hole 28 formed at the boundary between the upper surface and the side surface of the linear frames 20a and 20b is extremely large. It is formed small. Accordingly, while the linear frames 20a and 20b are smoothly folded, the boundary portion between the vertical frame portion 22 and the horizontal frame portion 21 can be formed in close contact with the upper surface of the linear frames 20a and 20b. Therefore, when the LCD module is combined with the LCD module housing, unnecessary light emitted to the front surface of the LCD can be minimized, and the display quality can be further improved.

  On the other hand, in the above-described embodiment of the present invention, the configuration in which the rectangular frames 30 are manufactured by joining the linear frames 20a and 20b through a bending process is described, but the present invention is not limited thereto. That is, the linear frames 20a and 20b need not be folded after the linear frames 20a and 20b are successively pressed using a progressive mold. That is, depending on the appearance of the LCD module, a plurality of (four in this embodiment) linear frames are brought into contact with each other so as to form polygonal (square in this embodiment) frames. Then, the LCD module housing of the rectangular frame 30 can be manufactured by fixing the end portions in contact with each other by a coupling means such as laser welding. In this case, there is a problem that the number of welded parts increases, but there is an advantage that a separate folding process is not required.

  In the embodiment of the present invention, the linear frames 20a and 20b are pressed using a progressive mold, but an L-shaped frame folded not only in a straight line but also at a right angle may be processed. it can. Of course, as described above, it is possible to add a process for confirming whether or not the processed rectangular frame 30 has a right angle and twist.

  Therefore, when the LCD module housing frame of the present invention and the LCD module housing using the same are manufactured as described above, the manufacturing process can be simplified and at the same time, the plate 2 material that is unnecessarily consumed can be eliminated. Further, when the LCD module housing is manufactured, the linear frames 20a and 20b can be driven out immediately while the metal pieces formed in a roll shape are automatically mounted and transferred only to a pair of progressive molds. For this reason, the material cost can be reduced by 50% or more, and an extremely economical effect can be brought about. Since the progressive mold has a very high processing speed, the processed linear frames 20a and 20b can be bent immediately in the next step. Thereafter, the production rate can be further increased by performing only the welding process of fixing them together. In addition, the present invention does not require a large amount of expensive mold machines, and only requires a pair of progressive molds. For this reason, the facility investment expense by metal mold | die installation can be reduced about 70 to 80% compared with the existing. In addition, since only one pair of mold machines is used, when several mold machines are used as in the existing robot apparatus that can transfer the flat plate 2 material processed between the molds to the next process or Since there is no need for a defective product confirmation device, etc., it is extremely economical.

It is a top view which shows the structure of a linear frame. It is a figure which shows the manufacturing method of the LCD module housing concerning embodiment. It is a figure which shows the manufacturing method of the LCD module housing of another Example. It is a figure which shows the manufacturing method of the LCD module housing of another Example. It is a figure which shows the manufacturing method of the LCD module housing of another Example. It is a figure which shows the manufacturing method of the conventional LCD module housing.

Explanation of symbols

20a linear frame, 20b linear frame, 21 horizontal frame part,
22 vertical frame part, 26 notch part for folding, 28 hole part, 29 joint part,
30 rectangular frame

Claims (5)

In a method for manufacturing a housing for an LCD module,
A step of producing a linear frame in which the LCD module housing frame is continuously pressed in a straight line so as to have a notch for folding using a progressive mold, and simultaneously bent in the width direction ; ,
A bending step of folding the linear frame into a horizontal frame portion and a vertical frame portion with respect to the folding notch portion ;
A method of manufacturing a housing for an LCD module, comprising: a step of bringing two bent linear frames into contact with each other so as to form a rectangular frame; and a step of fixing the ends in contact with each other integrally. An LCD module housing manufactured by the method for manufacturing an LCD module housing according to claim 1 ,
Is formed by the notch for folding before reporting, the both ends of a pair of vertical frame and the horizontal frame portion integrally connected to each both ends of the lateral frame portions and longitudinal frame portions of the other set are welded together An LCD module housing comprising a rectangular frame fixed integrally with each other. The LCD module housing according to claim 2 , wherein a hole is formed in the folding notch. The LCD module housing according to claim 3 , wherein the hole is formed at an inner end of the folding notch. The both ends of the one set of the vertical frame portion and the horizontal frame portion and the other frame of the horizontal frame portion and the both ends of the vertical frame portion are in contact with each other, and are welded to the whole surface or the top surface by laser welding. LCD module housing according to any one of claims 2 to 4, characterized in that fixed to.

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