JP2005141170A - Joining method of plate material made of metal, shielding frame of liquid crystal display using the same, and manufacturing method of shielding frame - Google Patents

Joining method of plate material made of metal, shielding frame of liquid crystal display using the same, and manufacturing method of shielding frame Download PDF

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JP2005141170A
JP2005141170A JP2003380350A JP2003380350A JP2005141170A JP 2005141170 A JP2005141170 A JP 2005141170A JP 2003380350 A JP2003380350 A JP 2003380350A JP 2003380350 A JP2003380350 A JP 2003380350A JP 2005141170 A JP2005141170 A JP 2005141170A
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frame
portions
fitting
liquid crystal
crystal display
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JP4643901B2 (en
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Taketoshi Ishijima
Hiroo Numazawa
碩夫 沼澤
武寿 石島
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Shinei Sangyo:Kk
株式会社新鋭産業
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Abstract

PROBLEM TO BE SOLVED: To join a metal plate material and to prevent the leakage of light and the occurrence of insufficient strength as much as possible while adopting a means for reducing the manufacturing cost of a frame called fitting and locking, and this joining method The present invention provides a shielding frame for a liquid crystal display using the same and a method for manufacturing the same.
SOLUTION: At each joint end portion of a metal plate material to be joined or a shield frame of a liquid crystal display, a fitting locking portion formed by alternately providing a plurality of convex portions and concave portions having a start end portion and a constricted portion is provided. The protrusions and recesses of these fitting locking parts are fitted and connected from above and below in the up and down direction, and the protruding and recessed parts of these fitting and locking parts are fitted and connected from above and below. The bulging portion is crushed by caulking, and thus the fitting connection portion is integrated and joined.
[Selection] Figure 3

Description

  The present invention relates to a method for joining metal plate materials, a frame for shielding a liquid crystal display, and a method for producing the frame for shielding.

  The liquid crystal display has an outer periphery and a rear portion covered with a shielding frame, but as shown in FIG. 15, the shielding frame 1 has a usually three-layer structure, and the frontmost frame-like front panel 1a. And a frame-like center panel 1b in the middle part and a rear panel 1c in the rear part. The center panel 1b is structured to be fitted into the front panel 1a. Some small liquid crystal displays omit the center panel. In addition, what is shown by the instruction symbol 2 is a liquid crystal display.

  The frame-like front panel 1a and center panel 1b are bent so that the cross-section of each side is L-shaped, but the manufacturing process is performed by punching a strip-shaped plate material wound in a roll shape with a press machine, First, a frame-like shape having a substantially rectangular shape as shown in FIG. 16 is prepared, and the edge of each side is bent from this, so that the cross section of each side as shown in FIG. The frame-shaped front panel 1a and center panel 1b to be formed are formed. In addition, although what was illustrated is a center panel and the detailed concrete shape is different, the basic manufacturing process is the same as that of the front panel, and therefore illustration is omitted.

  The above-mentioned conventional front panel and center panel are punched out with a press machine in the size of the state of the frame-like state before the folding of the frame-like shape of the entire panel from the strip-shaped plate material rolled in the manufacturing process. Therefore, the central portion a that is punched out so as to be applied or fitted to the edge of the liquid crystal display shown by hatching in FIG. 16 and FIG. Therefore, this part has to be discarded, and there is a disadvantage that the material is wasted. In particular, the materials such as the center panel and the front panel are made of stainless steel or aluminum, and the price is higher than that of an iron plate.

  In order to solve such problems, those described in the following patent documents filed by the present applicant are known.

In this application, the applicant of the present application is configured by dividing all or part of a frame-like panel constituting a shielding frame of a liquid crystal display into a plurality of constituent members. A fitting locking portion is provided at each end portion of each component member to be connected to each other, and one or a plurality of constricted portions are provided in the vertical direction, each having a constricted portion. Consists of a convex part and a concave part, and a boss part is further provided on the surface part of the convex part, and the convex part and the concave part of each fitting locking part are fitted and connected to each other from above and below, and the fitting locking The boss | hub part was crushed by caulking a part from an up-down direction, and what was comprised in the frame-shaped panel by integrating each connection part was proposed.

  The shielding frame described in the above-mentioned Patent Document 1 saves material and saves the material cost, and the joining portion of each constituent member is not mechanically welded but mechanically joined. However, there is a risk of light leaking from the mechanical joint, and there are some difficulties in strength. There was a case.

  And the technique described in the said patent document 1 can be used when joining metal materials widely besides the flame | frame for shielding of a liquid crystal display.

  The object of the present invention is basically as described in the above-mentioned Patent Document 1, and is equipped with a frame divided into a plurality of constituent members and fitted to each joint end of the divided constituent members. Although the method of joining the mating locking parts to each other is adopted, light is leaked or the strength is insufficient while reducing the manufacturing cost of the frame by devising the configuration of these fitting locking parts. It is an object of the present invention to provide a method for joining metal plate materials that prevents the occurrence of squeezing as much as possible, a frame for shielding a liquid crystal display using this joining method, and a method for producing the same.

  In order to achieve the above-described object, the present invention provides a fitting locking portion formed by alternately providing a plurality of convex portions and concave portions having a start end portion and a constricted portion at each joint end portion of the metal plate materials to be joined. Protrusions and recesses of these mating locking parts are fitted and connected from above and below in the vertical direction, and the fitting and connecting parts are moved up and down. The protruding portion is crushed by caulking from a direction, and the fitting connection portion is integrated and joined.

  According to the present invention, when the joining method is applied to a shielding frame for a liquid crystal display, all or a part of the frame-like panel constituting the shielding frame is divided into a plurality of constituent members. A fitting locking portion is provided at each end portion of each of these constituent members to be connected to each other, and a plurality of these fitting locking portions are provided alternately. Consists of projections and recesses to be fitted, and by crushing these projections and recesses along the inside of each other's contour line, the contour line of the convex portion is expanded outward and the contour line of the recess is expanded inwardly. Protruding and recessed portions of each fitting locking portion are fitted and connected to each other in the vertical direction, and the fitting locking portion is caulked from the vertical direction. Crush the ridges and hold each Characterized in that form the frame-like panel by integrating the sintered part.

  Furthermore, when the present invention is applied to a shielding frame having a planar polygonal shape for a liquid crystal display, all or part of the frame-like panel constituting the shielding frame is divided at a plurality of locations at each corner. A plurality of upper and lower portions having a start end portion and a constricted portion are provided on each end portion of each of the constituent members connected to each other, and each of the engagement locking portions is provided alternately. Consists of convex portions and concave portions that are fitted from the direction, and these convex portions and concave portions are squeezed along the inner side of each other's contour line to crush the contour line of the convex portion outward. Protrusions that bulge to the sides are provided continuously or discontinuously, and the protrusions and recesses of the respective engagement locking portions are fitted and connected to each other from above and below, and the respective engagement locking portions are caulked from above and below. By pushing the ridge Rude, characterized in that form the frame-like panel by integrating the respective connecting portions have.

  According to the present invention, the structural members constituting the frame-like panel can be composed of two substantially L-shaped members divided at the corner portions, or four members constituting each side.

  In the present invention, the planar shape of each fitting locking portion is a right angle cut line cut in a right angle direction from both lateral sides of the component member, and an inclined cut that obliquely connects both ends of each cut line. It can consist of lines.

  The present invention further provides a part of the frame-like panel constituting the shield frame divided into a plurality of constituent members, each of which is connected to each other at the end portion and the neck portion. A fitting locking part comprising a convex part having a convex part and a concave part having a constricted part provided adjacent to the convex part is provided continuously or not along the contour line of the convex part and the concave part. The protrusions and recesses of the respective fitting locking portions are fitted and locked together in the vertical direction, and then the fitting locking portions are caulked from the vertical direction. By crushing and expanding the contour lines of the convex part and the concave part in the horizontal direction, the constituent members are integrated.

  And the mutual integration can be strengthened by bend | folding the edge part of each edge | side of each structural member including the connection part of a fitting latching | locking part.

  According to the present invention, a plurality of constituent members constituting the frame-shaped panel are punched using a press, and at the same time as the punching step or in a separate step, the connecting end portions are connected to each other at the start end portion. A fitting locking portion in which convex portions and concave portions having constricted portions are alternately provided is formed while providing raised portions continuously or discontinuously along the contour lines of the convex portions and the concave portions. The respective engaging members are engaged and engaged with each other from above and below, and then each of the engaging and engaging portions is caulked from above and below, and the raised portions are crushed to bulge the convex portions in the horizontal direction. In addition, the fitting locking portion is bent in a right angle direction.

  According to the first aspect of the present invention, when the convex portions and the concave portions of the fitting locking portions provided at the joining end portions of the metal plate materials to be joined are fitted from above and below and then caulked from above and below. When the raised portions are crushed and bulge outward, the respective joint portions are joined tightly and firmly without gaps.

  According to the second or third aspect, since the joining portion of the shielding frame of the liquid crystal display is joined tightly and firmly without a gap, the conductivity is improved and the portion beyond the joining portion leaks to the outside. The effect that it can prevent reliably can be show | played.

  According to the fourth aspect of the present invention, the same effects as those of the second or third aspect can be obtained, and the constituent members can be punched into a substantially V shape with respect to the band-shaped material, thereby greatly saving the material. In addition, since there are two joining portions of the divided component members, joining can be facilitated, and there can be obtained an effect that the strength is not inferior to the conventional one that is punched into a frame shape from the beginning.

When configured as in claim 5, the same effect as in claim 2 or 3 can be obtained, and the constituent members can be punched out of a strip-shaped plate material thinner than in the case of claim 3, thereby reducing the material cost and reducing the size. Since the constituent members can be punched with the press machine, the constituent members can be manufactured inexpensively and easily.
If it comprises like Claim 6, joining of a junction part will become still stronger, and even if it handles roughly, there can exist an effect that a junction part does not fall.

  If comprised like Claim 7, each structural member can be integrated as one frame, and there exists an effect that the isolation | separation of the horizontal direction of a panel can be prevented.

  According to the eighth aspect, the same effect as that of the seventh aspect can be obtained, and the separation in the front-rear direction becomes difficult and the panel can be more integrated.

  When configured as in claim 9, the same effect as in claim 8 is obtained, but also the panel after joining is not only separated in the horizontal direction but also difficult to separate in the front-rear direction. There is an effect that it is possible to further enhance the integration.

  1 to 7 show an embodiment in which the present invention is applied to a center panel of a shielding frame for a liquid crystal display. According to the drawings, in FIG. 1, the constituent members 10a and 10b constituting the center panel 10 having a rectangular frame shape to be described later are diagonally formed to form corner portions when they are combined into a frame shape. Each of the ends that are connected to each other in a substantially L-shape is formed at each end portion that is a connecting portion with each other, as shown in FIGS. , 12a and fitting locking portions 11, 12 each having a substantially pierced concave portion 11b, 12b are provided so that the start end portions 11e, 12e are aligned in the horizontal direction. In particular, as shown in FIG. 1, the portion protruding outside each side portion or delimited by a dotted line is particularly when the section is bent into an L shape as shown in FIGS. The bending allowance is 10h. Convex portions 11c, 11d, 12c, and 12d are respectively provided in the convex portions 11a and 12a having a substantially pierced shape and the concave portions 11b and 12b having a pierced shape, and the convex portions 11a and 12a are formed as concave portions 11b and 12b. It is devised so that the convex portions 11a and 12a and the concave portions 11b and 12b are engaged with each other and are not separated in the horizontal direction when they are fitted to each other from above and below.

  The shapes of the start end portions 11e and 12e of the fitting locking portions 11 and 12 are cut at right angles by shifting the cut positions from both side edges of the constituent members 10a and 10b, and the ends of the right angle cut lines 11f and 12f Are formed in a substantially zigzag shape by oblique cut lines 11g and 12g. And in the fitting latching | locking parts 11 and 12 mutually joined, when the shape is reversed, the mutual start end parts 11e and 12e are comprised so that it may correspond.

  And in the convex parts 11a, 12a, the concave parts 11b, 12b, the constricted parts 11c, 11d, 12c, 12d, and the starting end parts 11e, 12e bordering the fitting locking parts 11, 12 of the constituent members 10a, 10b, The ridges 13 and 14 are continuously formed by half punching by press working so as to border them.

  Each of the constituent members 10a and 10b is pierced by overlapping the fitting locking portions 11 and 12 from above and below in order to form a frame-shaped center panel that is connected and coupled in the planar direction. The parts 11a and 12a and the pierced recesses 11b and 12b are mechanically fitted and engaged. If it does in this way, the thing of the expansion state before bending of a frame-shaped center panel will be completed, and mutual component members 10a and 10b will not separate in the horizontal direction.

  In this manner, when the fitting locking portions 11 and 12 are caulked from above and below using a press machine, the raised portions 13 and 14 are plastically deformed and expanded, and the convex portions 11a and 12a and the concave portions 11b and 12b are expanded. The constrictions 11c, 11d, 12c, and 12d and the start end portions 11e and 12e between them are closely connected and can be integrated. However, in an actual work procedure, the convex portions 11a and 12a of the fitting locking portions 11 and 12 are applied to the concave portions 11b and 12b, and are caulked from above and below using a press machine.

  Next, when the bending margin 10h of the constituent members 10a and 10b as shown in FIG. 11 is bent using a press machine, each side has a L-shaped cross section as shown in FIGS. A shaped center panel 10 is formed.

  Next, as for the shape of the convex part and the concave part of the fitting locking part, the above-mentioned embodiment is a round pierced convex part and a round pierced concave part, but is limited to this shape. Instead, it can be formed into a square shape, a wedge shape, a jigsaw puzzle shape or the like provided with a constricted portion or a boss portion.

  Further, as shown in FIG. 8, each component member may be continuously punched out of a rolled material into a plane substantially L-shape obtained by dividing the panel into two by a press machine. It may be divided into four strips, and these may be combined as described above to bend the edge to form a center panel. Alternatively, the structural member may be formed in a substantially U-shape when it is punched with a press. In that case, the strip material may be punched by feeding in a direction perpendicular to the feed direction punched by a press, but a thin strip material that matches the developed width of the component is prepared. Then, this may be sent automatically or manually to form the constituent members constituting the four sides, and these may be connected and coupled by the above-described means so as to form a planar square shape.

Test example

  Tensile strength test and bending strength test of samples B and C processed as shown in FIGS. 9A, 9B and 10A, 10B using the configuration and joining method described in Example 1 were performed. The results are shown in Tables 1 to 3. The sample B shown in FIGS. 9A and 9B has a material thickness of 1.0 mm, a width of 19.5 mm, a height of 19.5 mm, and a length of 160 mm. The sample C shown in FIG. 2 has a thickness of 0.8 mm, a width of 13 mm, a height of 13 mm, and a length of 100 mm. In the tensile strength test, both ends of the samples B and C are clamped and pulled in the tensile strength test, and in the bending strength test, the joints D and E of the samples B and C are loaded. In each case, the load is applied until the joint portions D and E are separated, and the tensile fracture strength at which the joint portions D and E are completely separated and the deformation characteristics in which a gap occurs in the joint portions D and E are measured. did. As materials for samples B and C, three types of SECC, SUS, and AL were used.











  It has been confirmed that any of the above samples has the tensile strength, tensile deformation characteristics, and bending deformation characteristics required as a shielding frame for a liquid crystal display.

  Next, as shown in FIGS. 11 and 12, the fitting locking portions 17, 18, 19, and 20 are different from those in the first embodiment, and are not zigzag-shaped but straight with respect to the constituent members 15 and 16. It is possible to construct a shape that crosses the target or diagonally.

  Further, the shape of the raised portions may be provided continuously as in the first embodiment, but as shown in FIG. 13, it is configured so that they are not continuous with each other by a large number of small raised portions 21, 22,. May be.

  FIG. 14 shows another embodiment. When a part of the center panel 25 is in contact with a battery (not shown), only the part in contact with the battery is made of gold, copper, or surface gold plating. In the second embodiment, the fitting and locking portions 27 and 28 are shown in a straight line, but the fitting locking portion shown in the first embodiment has the same structure. Configurations and other configurations can also be used. The instruction symbol 26a is a contact portion that contacts a battery (not shown).

  Although the above embodiment has been described for the case where it is applied to the center panel, it can also be applied to the front panel as it is. As required, the present invention may be implemented only on the center panel or on both the center panel and the front panel. In the case where the two are divided into two parts, the strength is increased by shifting the fitting position by 90 ° so that the divided parts do not overlap each other.

  Furthermore, as described above, the bonding method according to the present invention can be used when inexpensively and firmly bonding metal plates that are widely plastically deformed in addition to the panel of the liquid crystal display.

  Since the present invention is configured as described above, it can be widely used as an inexpensive joining method for joining metal plate materials, and can also be applied to a shielding frame for a liquid crystal display that is required to reduce the manufacturing cost. Is.

It is a disassembled plan view in the state before bending the structural member of the center panel which comprises the flame | frame for shielding which concerns on this invention in cross-section substantially L shape. FIG. 2 is an enlarged plan view of a part A of the constituent member illustrated in FIG. 1. It is the top view which looked at the fitting latching | locking part of each structural member fitted from the state of FIG. FIG. 4 is a plan view of a state in which the raised portions are crushed and flushed from the state of FIG. 3. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIG. 2 is a plan view of the center panel as seen by fitting and locking fitting locking portions that are joint portions of the respective constituent members shown in FIG. 1 and further bending the bending margin of each side. It is a side view of the center panel of FIG. It is explanatory drawing which shows the shaping | molding in the case of punching each structural member of a panel from a strip | belt-shaped board | plate material. It is the front view and side view of the sample B which used for experiment. It is the front view and side view of the sample C which used for experiment. It is a top view which shows the other Example of the fitting latching | locking part which concerns on this invention. It is a top view which shows the further another Example of the fitting latching | locking part which concerns on this invention. It is a top view which shows other Example of the joining method which concerns on this invention. It is a top view which shows other Example of the protruding part which concerns on this invention. It is a disassembled perspective view explaining the structure of the frame for shielding of a liquid crystal display. It is a top view which shows the state before the bending process of the center panel of the conventional shield frame. It is a top view which shows the state after the bending process of the center panel of the conventional shield frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame for shielding 1a Front panel 1b Center panel 1c Rear panel 10 Center panel 10a Constituent member 10b Constituent member 10h Bending allowance 11 Fitting latching part 11a Convex part 11b Concave part 11c Constriction part 11d Constriction part 11e Starting end part 11f Straight cut line 11g Diagonal incision line 11g Protruding part 12 Fitting locking part 12a Protruding part 12b Concave part 12c Constricted part 12d Constricted part 12e Starting end part 12f Right angle incising line 12g Diagonal incising line 13 Protruding part 14 Protruding part 15 Constituent member 15a Small protuberant part 16 Constituent member 16a small raised portion 17 fitting locking portion 18 fitting locking portion 19 fitting locking portion 20 fitting locking portion 21 small protruding portion 22 small protruding portion 25 center panel 26 contact material 27 fitting locking portion 28 fitting Locking part

Claims (9)

  1.   Fitting and locking parts formed by alternately providing a plurality of convex parts and concave parts having a starting end part and a constricted part at each joining end part of the metal plate materials to be joined are continuous or discontinuous along each contour line. The protrusions and recesses of these fitting locking portions are fitted and connected from above and below, and then the fitting and connecting portions are caulked from above and below to crush the above raised portions, Thus, a method for joining metal plate materials, characterized in that the fitting connection portions are integrated and joined.
  2.   A shield frame for a liquid crystal display, which is configured by dividing all or part of a frame-like panel constituting the shield frame into a plurality of constituent members, and connecting each of the constituent members to each other. A fitting engagement portion is provided in the part, and each of these engagement engagement portions is provided alternately with a plurality of convex portions and concave portions having a start end portion and a constriction portion that are fitted from above and below, Protrusions and recesses are continuously or discontinuously provided to bulge the contours of the projections outward by squeezing the projections and recesses along the contours of each other. The protrusions and recesses of each fitting locking part are fitted and connected to each other in the vertical direction, and the protruding parts are crushed by caulking the fitting locking part from the vertical direction, thereby integrating the connecting parts. Frame-shaped It characterized in that form and Le, shielding frame on the LCD display.
  3.   A shielding frame having a planar polygonal shape for a liquid crystal display, and is configured by dividing all or part of a frame-shaped panel constituting the shielding frame at a plurality of locations at each corner. Protrusions fitted from above and below to each other, each provided with a fitting locking portion at each end to be connected to each other, and having each of these fitting locking portions alternately provided with a start end portion and a constricted portion. A raised portion that bulges the contour line of the convex portion to the outside by squeezing the convex portion and the concave portion along the inside of each other's contour line. Provided continuously or discontinuously, the protrusions and recesses of each fitting locking part are fitted and connected to each other from above and below, and the above-mentioned protruding parts are crushed by caulking each fitting locking part from above and below. , So each connecting part Characterized in that form the frame-like panel by the body of the shield frame of a liquid crystal display.
  4. 4. The frame for shielding a liquid crystal display according to claim 1, wherein the constituent members constituting the frame-shaped panel are two substantially L-shaped members divided at a corner portion. .
  5. 5. The shielding frame for a liquid crystal display according to claim 2, wherein the constituent members constituting the frame-like panel are constituted by four members constituting each side.
  6. The planar shape of each of the fitting locking portions is composed of a right angle cut line cut in a right angle direction from both lateral sides of the component member, and an inclined cut line that obliquely connects both ends of each cut line. The shielding frame for a liquid crystal display according to claim 2, wherein the frame is a shielding frame.
  7. All or part of the frame-like panel constituting the shield frame is divided into a plurality of constituent members, and each of the constituent members is connected to each other, and a convex portion having a start end portion and a constricted portion. And a fitting locking portion comprising a starting end portion and a concavity having a constricted portion provided adjacent to the convex portion, and a raised portion continuously or discontinuously along the contour line of the convex portion and the concave portion. Next, the protrusions and recesses of the respective engagement locking parts are fitted and locked together in the vertical direction, then the engagement locking parts are caulked from the vertical direction, and the protruding parts are crushed and protruded. A method for manufacturing a shielding frame for a liquid crystal display, wherein the respective constituent members are integrated by expanding each contour line of the concave portion in the horizontal direction.
  8. 8. The shield for a liquid crystal display according to claim 7, wherein the edge of each side of each component member is bent including the connecting portion of the fitting locking portion to enhance mutual integration. Manufacturing method of the frame.
  9. A plurality of constituent members constituting a frame-shaped panel are punched using a press, and a convex portion having a start end portion and a constricted portion at a connecting end portion for connecting the respective constituent members to each other at the same time as this punching step or a separate step. And engaging recesses provided alternately with recesses are formed along the contour lines of the protrusions and recesses while providing raised portions continuously or discontinuously. The components are fixedly engaged with each other in the vertical direction, then the respective engagement locking portions are caulked from the vertical direction, and the bulging portions are crushed to bulge the convex portions in the horizontal direction so as to integrate the constituent members. 9. The method for manufacturing a shielding frame for a liquid crystal display according to claim 7, wherein the fitting locking portion is bent in a right angle direction.
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JP2003380350A JP4643901B2 (en) 2003-11-10 2003-11-10 Method for joining metal plate materials, shielding frame for liquid crystal display using this joining method, and method for producing this shielding frame
CNB2003101103721A CN100460941C (en) 2003-11-10 2003-12-31 Connecting method for metal plate, liquid crystal display protective cover and its producing method

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