JP2016168614A - Manufacturing method for metal decorative body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a metal decorative body which can be manufactured relatively easily at low cost.SOLUTION: A manufacturing method for a metal decorative body configured of an outer frame body 4 configured of a plurality of outer members 8a-8d and inner members 6a, 6b disposed inside this outer frame body 4 comprises an outer frame manufacturing process for manufacturing the outer frame body 4 by anchoring the plurality of outer members 8a-8d by welding, a superposition welding process for disposing the inner members 6a, 6b inside the outer frame body 4 to superpose on a part of the outer frame body 4, and to fix the same by welding, and a forging coupling process for pressing the outer frame body 4 and the inner members 6a, 6b to couple both by forging.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a metal decorative body used as a decorative member such as a wall surface or a ceiling.

  For gates, handrails, and the like, metal (for example, iron) ones are widely used for practical purposes (for example, Non-Patent Document 1). In such an iron gate, a handrail, etc., for example, a rod-like member having a circular cross-section is fixed as required by welding, and a decorative body is attached by welding according to the customer's request. As this decorative body, for example, a raw material member (for example, an iron bar-like member) heated and struck and finished into a decorative part of a desired shape is used as it is, or these decorative parts are fixed by welding. Is used.

Naldic Co., Ltd. Product Catalog “Naldic Rohto Iron & Original Exterior Catalog” pages 7-12

  However, in such a prior art decorative body, when changing the shape of the raw material member, the raw material member is beaten one by one to finish it into a decorative part, and the manufactured decorative parts are joined to form a decorative body. In this case, the decorative parts are fixed one by one by welding, so that there is a problem that it takes time to manufacture one decorative body and the manufacturing cost is expensive.

  An object of the present invention is to provide a method for manufacturing a metallic decorative body that can be manufactured relatively easily and at low cost, and can have a high-class feeling.

According to a first aspect of the present invention, there is provided a metal decorative body manufacturing method comprising: an outer frame body comprising a plurality of outer members; and an inner member disposed on the inner side of the outer frame body. A method of manufacturing a decorative body,
An outer frame body manufacturing step of manufacturing the outer frame body by superimposing and welding the plurality of outer members, and disposing at least a part of the inner frame inside the outer frame body A superposition welding step of superposing and welding with a part of the superposition welding step, and a forging connection step of forging and connecting the outer frame body and the inner member by pressing the outer frame body and the inner member after the superposition welding step. Features.

  In the method for manufacturing a metal decorative body according to claim 2 of the present invention, the plurality of outer members include a first outer member extending in a first direction and a second direction perpendicular to the first direction. A second outer member extending to the first outer member, and the second outer member is disposed on one side of the outer frame body with respect to the first outer member and fixed by welding, and the inner member is fixed to the outer frame. It is arranged on the one side of the body and fixed to the first outer member or on the other side of the outer frame and fixed to the second outer member by welding.

  In the method for manufacturing a metallic decorative body according to claim 3 of the present invention, the inner member includes a first inner member extending in the first direction and a second inner member extending in the second direction. The first inner member is fixed to the second outer member on the other side of the outer frame by welding, and the second inner member is fixed to the first outer member on the one surface side of the outer frame. It is fixed by welding.

  Moreover, in the manufacturing method of the metallic decorative body according to claim 4 of the present invention, the outer member and the inner member are each composed of a rod-shaped member having a substantially circular cross section, and the outer diameter of the outer member is It is characterized by being larger than the outer diameter of the inner member.

  In the method for manufacturing a metallic decorative body according to claim 5 of the present invention, the first member having a large outer diameter and the second member having a smaller outer diameter than the first member are connected to each other to decorate the metal decorative body. A method of manufacturing a metal decorative body for manufacturing a body, wherein the first and second members extending in a first direction are overlapped with the first and second members extending in a second direction different from the first direction. Press welding the superposition welding process for welding together, the first and second members extending in the first direction after the superposition process, and the first and second members extending in the second direction. And a forging connection step for forging and connecting the two.

  Furthermore, in the method for manufacturing a metal decorative body according to claim 6 of the present invention, the first and second members extending in the second direction on one side of the first and second members extending in the first direction. Are overlapped and fixed by welding.

  According to the method for manufacturing a metal decorative body according to claim 1 of the present invention, the outer frame body is manufactured by welding with a plurality of outer members overlapped with each other, so that the outer frame body can be firmly fixed relatively easily. . Further, the inner member decoratively disposed inside the outer frame body is fixed by welding in a state where a part thereof is overlapped with a part of the outer frame body, and then the outer frame body is subjected to press working. Therefore, it can be connected relatively easily and firmly. Further, during the press working, the outer member is joined by plastic deformation so as to enter each other at the overlapping portion of the outer member, and a part of the inner member and one of the outer members are also bonded at the overlapping portion of the inner member and the outer frame. The parts can be plastically deformed and joined so as to enter each other, thereby providing a high-quality metallic decorative body with a handmade feeling as a whole.

  Moreover, according to the manufacturing method of the metal decorative body according to claim 2 of the present invention, the outer member includes the first outer member extending in the first direction and the second outer member extending in the second direction, Since the second outer member is fixed to the first outer member on one side of the outer frame by welding, and the inner member is fixed to the first outer member on one side of the outer frame by welding, the outer frame The second outer member and the inner member are arranged on one side of the body, and the working force can be stably applied during the press working, so that the first outer member, the second outer member and the inner member enter each other. Thus, the plastic deformation can be combined. When the inner member is disposed on the other side of the outer member and fixed to the second outer member by welding, the second outer member, the first outer member, and the inner member are plastically deformed so as to enter each other. can do.

  According to the method for manufacturing a metallic decorative body according to claim 3 of the present invention, the inner member includes a first inner member extending in the first direction and a second inner member extending in the second direction, The first inner member is fixed to the second outer member by welding together with the first outer member on the other side of the outer frame body, and the second inner member is a first outer member together with the second outer member on one side of the outer frame body. Since the first and second inner members are fixed to each other by welding, the processing force can be stably applied during the press working even if the arrangement of the first and second inner members is complicated. The second outer member and the second inner member can be securely coupled by being plastically deformed so as to enter each other.

  According to the method for manufacturing a metal decorative body according to claim 4 of the present invention, the outer member and the inner member are constituted by rod-shaped members having a substantially circular cross section, and the outer diameter of the outer member is the outer diameter of the inner member. Therefore, by pressing, the plastic deformation of the outer member is increased and the surface part of the outer frame is flattened, whereas the plastic deformation of the inner member is small and rounded. The shape after press processing can be finished into a high-quality one with a handmade feeling.

  According to the method for manufacturing a metal decorative body according to claim 5 of the present invention, the first and the first members extending in the first direction using the first member having a large outer diameter and the second member having a small outer diameter. Since the second member and the first and second members extending in the second direction are overlapped and welded, and then subjected to press working to couple them together, the first and second members extending in the first direction It is possible to provide a high-quality metallic decoration body in which two members and a first member and a second member extending in the second direction are joined by plastic deformation so as to enter each other. it can.

  Furthermore, according to the method for manufacturing a metal ornament according to claim 6 of the present invention, the first and second members extending in the second direction are overlapped on one side of the first and second members extending in the first direction. Since it is fixed by welding, the processing force can be stably applied during the press working, and the first and second members extending in the first direction and the first and second members extending in the second direction. The two members can be joined by being plastically deformed so as to enter each other.

The front view which shows an example of the metal decoration body manufactured by the 1st Example of the manufacturing method according to this invention. The figure for demonstrating the outer frame body manufacturing process which manufactures the outer frame body of a metal decoration body. The figure for demonstrating the superposition welding process which piles up and welds the outer frame body and inner member of a metal decoration body. The simplification figure for demonstrating the forge connection process which forge connects the outer frame body and inner member of a metal decoration body. The simplified diagram which shows the state which performed the press work to the outer frame body and inner member of a metal decoration body. The figure which shows an outer frame body and an inner member after giving a press work. Fig.7 (a) is a figure which shows the 1st modification of a metal decoration body, FIG.7 (b) is a figure which shows the 2nd modification of a metal decoration body. The front view which shows the other example of the metal decoration body manufactured by the 2nd Example of the manufacturing method according to this invention. The figure for demonstrating manufacture of the outer frame body of the metal decoration body of FIG. FIG. 10A is a view showing a state where the first inner member is overlapped and welded to the outer frame body, and FIG. 10B is a state where the second inner member is further overlapped and welded to the outer frame body. FIG. The simplification figure for demonstrating the forge connection process of giving a press process to an outer frame body and performing forge connection. The figure for demonstrating the relationship between the outer diameter of a 1st member, and the outer diameter of a 2nd member. FIG. 13A is a diagram for explaining processing performed after press processing, and FIG. 13B is a diagram illustrating an application example after processing. FIG. 14A is a diagram for explaining processing performed after press processing, and FIG. 14B is a diagram illustrating another application example after processing.

  Hereinafter, with reference to an accompanying drawing, the manufacturing method of the metallic ornament according to the present invention is explained. First, with reference to FIG. 1, the metal decorative body manufactured by the first embodiment of the manufacturing method according to the present invention will be described. The illustrated metallic decorative body 2 includes a rectangular outer frame body 4 and a plurality (two in this embodiment) of inner members 6 (6a, 6b) disposed inside the outer frame body 4. It is configured.

  The outer frame 4 is composed of four outer members 8 (8a, 8b, 8c, 8d) arranged in a square shape, and these are fixed by welding, for example, spot welding. In this embodiment, the pair of outer members 8a, 8c (first outer members) facing each other extend in the first direction (the left-right direction in FIG. 1 and, for example, the lateral direction of the outer frame body 4), and are mutually A pair of second outer members 8b and 8d (second outer members) that face each other are in a second direction substantially perpendicular to the first direction (the vertical direction in FIG. Direction), both ends of the first outer members 8a, 8c and both ends of the second outer members 8b, 8d are overlapped with each other and fixed by welding (spot welding) as shown by a broken line 10, in this way. By fixing by welding, the first outer members 8a and 8c and the second outer members 8b and 8d can be firmly connected and fixed without being separated when press working is performed later.

  The inner member 6 (6a, 6b) is disposed on one side of the outer frame body 4 as described later, and both end portions thereof are connected and fixed to the first outer members 8a, 8c. In this embodiment, the inner member 6 (6a, 6b) extends in the second direction substantially parallel to the second outer member 8b, 8d, and both ends of the inner member 6 (6a, 6b) and the outer frame body 4 (first 1 and a part of the outer member 8a, 8c) are overlapped with each other and fixed by welding, for example, spot welding, as shown by a broken line 12, and fixed by welding in this way. Can be firmly connected and fixed without leaving the outer frame body 4 (first outer members 8a, 8c) and the inner member 6 (6a, 6b).

  The outer member 8 (8a to 8d) constituting the outer frame body 4 is composed of, for example, a rod-shaped member made of metal (for example, iron) having an appropriate shape with a circular cross section, and the inner member 6 (6a, 6b). Also, it is composed of a rod-shaped member made of metal (for example, iron) having an appropriate shape such as a circular cross section. When rod-shaped members having a circular cross section are used as the outer member 8 (8a to 8d) and the inner member 6 (6a and 6b), the outer member 8 (8a to 8d) is more external than the inner member 6 (6a and 6b). It is desirable to use a material having a large diameter. The outer member 8 (8a to 8d) has an outer diameter (diameter) of about 3 to 6 mm, and the inner member 6 (6a, 6b) has an outer diameter (diameter) of about 2 to 4 mm. In this way, the strength of the outer frame 4 can be increased and the strength of the decorative body 2 itself can be increased.

  Although such a metal decorative body 2 is not shown, it is used as a decorative object such as a wall or ceiling of a building, as a door surface of a door, as a shoji surface of a shoji, or as a partition surface such as a partition or partition. When applied to the above-described ones, the size can be increased or the decorativeness can be enhanced according to the application.

  Such a metallic decorative body 2 can be manufactured, for example, as shown in FIGS. As a procedure for manufacturing the decorative body 2, first, the outer frame body 4 is manufactured as shown in FIG. 2 (outer frame body manufacturing process). In this embodiment, since the outer frame body 4 is composed of four outer members 8 (8a to 8d), for example, one side of the first outer member 8a (for example, one side of the outer frame body 4) The second outer members 8b and 8d are disposed on the front side in FIG. 2, and one end portions (upper end portions in FIG. 2) of the second outer members 8ab and 8d are overlapped on both ends of the first outer member 8a. In addition, they are fixed by welding (for example, spot welding). Next, the welded material is turned over, the remaining first outer member 8c is disposed at the other end of the second outer members 8b, 8d, and the second outer member 8b, 8d is placed at the other end. 1 Both end portions of the outer member 8c are overlapped and fixed by welding (for example, spot welding).

  When the first and second outer members 8a to 8d are connected in this manner, the first outer members 8a and 8c extend in the first direction, and the second outer members 8b and 8d extend in the second direction, as shown in FIG. The rectangular outer frame body 4 can be manufactured. In this embodiment, both end portions of the outer member 8 (8a to 8d) protrude to the outside of the outer frame body 4. However, the outer member 8 (8a to 8d) having an appropriate length is used and overlapped. By superimposing them together when they are combined, it is possible to produce a product having no outward projecting portion.

  Next, the inner member 6 (6a, 6b) is fixed to the outer frame body 4 thus manufactured by welding (for example, spot welding) (superposition welding process). In this manufacturing method, the inner member 6 (6a, 6b) is disposed on one side of the outer frame body 4 (the front side with respect to the paper surface in FIGS. 2 and 3), and both end portions thereof are the first outer member. It is fixed to the middle part of 8a, 8c by welding. When the inner members 6 (6a, 6b) are provided on one side of the outer frame 4, that is, on the side where the second outer members 8b, 8d are disposed with respect to the first outer members 8a, 8c, these inner members 6 (6a, 6b) is preferably arranged so as to extend in the first direction between the second outer members 8b, 8d, and does not overlap with the second outer members 8b, 8d. Thus, the press working described later can be stably performed. In this embodiment, both end portions of the inner member 6 (6a, 6b) protrude to the outside of the first outer member 8a, 8c, but the inner member 6 (6a, 6b) having an appropriate length is used. In addition, by superimposing neatly when superimposing, it is possible to produce a configuration having no protruding portion.

  These inner members 6 (6a, 6b) may be arranged on the other side of the outer frame body 4 (on the rear side with respect to the paper surface in FIGS. 2 and 3). It is fixed to the middle part of the second outer members 8b, 8d by welding (even if spot welding). When the inner members 6 (6a, 6b) are provided on the other side of the outer frame body 4, that is, on the side where the first outer members 8a, 8c are disposed with respect to the second outer members 8b, 8d, these inner members 6 (6a, 6b) is preferably arranged between the first outer members 8a, 8c so as not to overlap with the second outer members 8a, 8c. Can be applied stably.

  Thereafter, the outer member 8 (8a to 8d) and the inner member 6 (6a, 6b) are forged and connected (forged connecting step). For this forging connection, a general press device 20 is used. The press apparatus 20 includes a die 22 attached to an apparatus main body (not shown) installed on a floor surface of a factory, and a fixed mold 24 is attached to the upper surface of the die 22. A slide 26 is disposed above the die 22, and the slide 26 is supported by an apparatus main body (not shown) so as to be movable in the vertical direction. A movable mold 28 is attached to the lower surface of the slide 26. Yes.

  In order to forge-connect the outer member 8 (8a to 8d) and the inner member 6 (6a, 6b), the inner member 6 (6a, 6b) is formed on the upper surface of the lower fixed mold 24 as shown in FIG. In the state where the outer frame body 4 is welded, the press device 20 is operated to move the slide 26 downward as indicated by the arrow 30, and as shown in FIG. The members 8a to 8d) and the inner member 6 (6a, 6b) are pressed (forged connection step). When press working (so-called forging) is performed, the outer diameter of the outer member 8 (8a to 8d) is large and the outer diameter of the inner member 6 (6a, 6b) is small. Both surfaces (upper and lower surfaces in FIGS. 4 and 5) of the outer frame body 4 (outer members 8a to 8d) and the upper surface of the inner member 6 (6a, 6b) are greatly plastically deformed to become flat (the inner member 6). When the outer diameter is large, the lower surface is processed flat). When forging is performed in this manner, the corners of the outer frame body 4, that is, both end portions of the first outer members 8a and 8c and both end portions of the second outer members 8b and 8d are plastically deformed. The intermediate portions of the first outer members 8a and 8c and the both end portions of the inner member 6 (6a and 6b) are plastically deformed and connected and fixed so as to enter each other.

  Thereafter, as shown by a two-dot chain line 31 (31a to 31d) in FIG. 6, portions projecting outward from the outer frame body 4, that is, both ends of the outer member 8 (8a to 8d) and the inner member 6 (6a and 6b). The part is cut and deleted (cut-removing step), and thus the decorative body 2 shown in FIG. 1 can be manufactured. When the outer member 8 (8a to 8d) and the inner member (6a, 6b) are fixed by welding so as not to protrude from the outer frame body 4, this cutting and removing step can be omitted.

  In such a manufacturing method, since both ends of the outer member 8 (8a to 8d) and the inner member 6 (6a, 6b) are connected and fixed by welding, these welds may be peeled off during press working. Therefore, the outer member 8 (8a to 8d) and the inner member 6 (6a, 6b) can be stably acted upon during the press working, and the decorative body 2 that is firmly coupled is manufactured. be able to. In addition, both ends of the outer member 8 (8a to 8d) and the inner member 6 (6a, 6b) are bitten together and fixed by pressing (forging), so the metal members are joined and welded. There is no welded part (the part where the welding material melts and hardens) like the time, and the appearance of the decoration body 2 as a whole can be finished beautifully to create a handmade feeling, and a high-quality metallic decoration body 2 is provided. be able to.

  In the embodiment described above, both end portions of the inner member 6 (6a, 6b) are fixed to the first outer member 8a, 8bc by welding (spot welding), but the inner member 6 (6a, 6b) is not necessarily It is not necessary to fix both ends by welding, and only one of the ends may be fixed by welding, and the ends may be connected and fixed by forging.

  Such metal decorations can be manufactured in various ways with improved design by changing the arrangement of the inner members, such as those shown in FIGS. 7 (a) and 7 (b). However, it can be manufactured in the same manner as described above. In the following embodiments, the same reference numerals are assigned to substantially the same components as those described above, and the description thereof is omitted.

  In the metal decorative body 2A of the first modification shown in FIG. 7A, the inner member 32 is composed of a rod-like member as described above, and a plurality (three in this embodiment) of inner members 32 ( 32a, 32b, 32c) are arranged obliquely and connected and fixed to the outer frame 4. That is, one end portions of the two inner members 32 a and 32 b are overlapped with the first outer member 8 a of the outer frame body 4, and the other end portions thereof are overlapped with the second outer member 8 d of the outer frame body 4. . Furthermore, one end portion of the remaining one inner member 32 c is overlapped with the second outer member 8 b of the outer frame body 4, and the other end portion is overlapped with the first outer member 8 c of the outer frame body 4. In this case, both end portions of the inner member 32 (32a to 32c) are fixed to the outer frame body 4 (outer member 8) by welding (spot welding). Manufactured by forging).

  Moreover, in the metal decorative body 2B of the second modified form shown in FIG. 7B, the inner member 34 is constituted by a substantially ¼ arc-shaped member, and a plurality (four in this embodiment) of inner sides are formed. The members 34 (34a to 34d) are connected and fixed so as to surround each corner of the outer frame body 4 (that is, between the adjacent outer members 8). That is, both end portions of the inner member 34a are superimposed on the upper side of a pair of adjacent outer members 8 (in this embodiment, the first outer member 8a and the second outer member 8b), and the inner member 34b. Both end portions of (34c, 34d) are overlapped on the upper side of the pair of adjacent outer members 8b, 8c (8c, 8d, 8d, 8a) of the outer frame body 4 in the same manner as described above. Also in this case, both end portions of the inner member 34 (34a to 34d) are fixed to the outer frame body 4 (outer member 8) by welding (spot welding). Forged).

  As shown in FIGS. 7A and 7B, when the inner member 32 (34) is disposed between the adjacent outer members 8, the inner member 32 (34) fixed to the first outer members 8a and 8b by welding. ) Is fixed to the first outer members 8a and 8c by welding on the side where the second outer members 8b and 8d are fixed by welding, and the inner member 32 is fixed to the second outer members 8b and 8g by welding. The end portion 34) is preferably welded and fixed to the second outer members 8b and 8d on the side on which the first outer members 8a and 8c are fixed by welding. The balance of the overall shape including the outer member 8 (8a to 8d) and the inner member 32 (34) is improved, and the overall height can be suppressed, thereby stabilizing the pressing (forging). Can be done .

  Next, with reference to FIG. 8, the metal decorative body manufactured by the second embodiment of the manufacturing method according to the present invention will be described. The illustrated metallic decorative body 2C includes a rectangular outer frame body 4 and a plurality (three in this embodiment) of inner members 52 (52a, 52b, 52c) disposed inside the outer frame body 4. It consists of and.

  As described above, the outer frame body 4 is composed of four outer members 8 (8a, 8b, 8c, 8d) arranged in a square shape, and these are fixed by welding (for example, spot welding). . As such an outer member 8 (8a to 8d), a rod-shaped member having a diameter (outer diameter) of about 3 to 6 mm can be used.

  One inner member 52a (which constitutes the first inner member) is disposed on the other surface side of the outer frame body 4 (that is, the rear surface side with respect to the paper surface in FIG. 9), and is between the first outer members 8a and 8c. Extending in the same first direction as these first outer members 8a, 8c. The first inner member 52a is located on the same side as the first outer members 8a and 8c, and both ends thereof are welded to the second outer members 8b and 8d (for example, spotted) in the same manner as the first outer members 8a and 8c. Fixed by welding).

  Further, the remaining two inner members 52b and 52c (which constitute the second inner member) are disposed on one side of the outer frame body 4 (that is, the front side with respect to the paper surface in FIG. 9), and the second outer member The members 8c and 8d extend in the same second direction as the second outer members 8b and 8d. The second inner members 52b and 52c are located on the same side as the second outer members 8b and 8d, and both ends thereof are welded to the first outer members 8a and 8c in the same manner as the second outer members 8a and 8c (for example, , Spot welding). As such an inner member 52 (52a to 52c), a rod-like member having a diameter (outer diameter) of about 2 to 4 mm can be used.

  With this configuration, the second outer members 8b and 8d and the second inner members 52b and 52c are arranged on one side of the outer frame body 4, and these are fixed to the first outer members 8a and 8c by welding. In addition, the first outer members 8a and 8c and the first inner member 52a are disposed on the other surface side of the outer frame body 4 and are fixed to the second outer members 8b and 8d by welding. The balance of the overall shape including the outer member 8 (8a to 8d) and the inner member 52 (52a to 52c) during processing can be improved, and the overall height can be suppressed. Forging) can be performed stably.

  In addition, instead of the above-described configuration, for example, one side of the outer frame 4 may be overlapped. In this case, the second outer members 8b and 8d and the second inner members 8a and 8c are overlapped with the second outer members 8a and 8c. The members 52b and 52c may be fixed by welding, and then the first inner member 52a may be fixed to the second outer members 8b and 8d by welding on the one surface side, or on the other surface side of the outer frame body 4. These may be overlapped. In this case, the first outer members 8a, 8c and the first inner member 52a are fixed to the second outer members 8b, 8d by welding, and then the first outer member on the other surface side. The second inner members 52b and 52c may be fixed to the members 8a and 8c by welding.

  In this embodiment, as shown in FIG. 8, the first inner member 52a extending in the first direction and the second inner members 52a and 52c extending in the second direction intersect and overlap each other. The portion is fixed by welding (spot welding), but welding at the intersection of the first inner member 52a and the second inner members 52b and 52c may be omitted.

  In this embodiment, the outer member 8 (8a to 8d) and the inner member 52 (52a to 52c) have the positional relationship shown in FIG. 12, and in such a positional relationship, the outer side of the first outer member 8a (8c). The relationship between the diameter D1 and the outer diameter d1 of the first inner member 52a is that the outer diameter D1 of the first outer member 8a (8c) is larger than the outer diameter d1 of the first inner member 52a (d1 <D1). The outer diameter d1 of the first inner member 52a is preferably 0.5 to 0.85 times the outer diameter of the first outer member 8a (8c) (0.5xD1 ≦ d1 ≦ 0.85 × D1).

  The relationship between the outer diameter D2 of the second outer member 8b (8d) and the outer diameter d2 of the second inner member 52b (52c) is such that the outer diameter D2 of the second outer member 8b (8d) is the second inner member 52b. It is larger than the outer diameter d2 of (52c) (d2 <D2), and the outer diameter d2 of the second inner member 52b (52c) is 0.5 to 0.85 of the outer diameter of the second outer member 8b (8d). It is preferable that it is double (0.5 × D2 ≦ d2 ≦ 0.85 × D2).

  In this embodiment, the first outer members 8a and 8c and the second outer members 8b and 8d have the same outer diameter, but those having different outer diameters may be used. The members 52a and the second inner members 52b and 52c have the same outer diameter, but may have different outer diameters. Further, the inner members 52 (52a to 52c) themselves may be used as outer members. You may make it use the thing from which a diameter differs.

  Such a metallic decorative body 2C can be manufactured, for example, as shown in FIGS. First, as shown in FIG. 9, both ends of the outer members 8a to 8d are welded (spot welded) as indicated by a broken line 10 to manufacture the outer frame 4 (outer frame manufacturing process).

  Next, as shown in FIG. 10, the inner member 52 (first and second inner members 52a to 52c) is welded and fixed to the outer frame body 4 (outer members 8a to 8d) thus manufactured (superposition welding). Process). As shown in FIG. 10A, the outer frame body 4 is turned over to the opposite side, and on the other surface side of the outer frame body 4, the first inner member 52a is positioned between the first outer members 8a and 8c. As shown by a broken line 12a in (a), both end portions of the first inner member 52a are fixed to the pair of second outer members 8b and 8d by welding (spot welding). Next, the outer frame body 4 to which the first inner member 52a is fixed is returned and returned to the original state. On one side of the outer frame body 4, the second inner members 52b, c are placed between the second outer members 8b, 8d. Positioning and fixing both ends of the second inner members 52b and 52c to the pair of first outer members 8a and 8c by welding (spot welding) as shown by a broken line 12b in FIG. Contrary to the above, as shown in FIG. 10B, after the second inner members 52b and 52c are welded to the first outer members 8a and 8c, as shown in FIG. The first inner member 52a may be welded to the two outer members 8b and 8d.

  Thereafter, the outer frame body 4 to which the inner member 52 (52a to 52c) is fixed is placed on the upper surface of the lower stationary mold 24, and the outer frame body 4 (outer members 8a to 8d) and The inner member 52 (52a to 52c) is pressed (forged connection step). Thus, when press working (so-called forging) is performed, both surfaces (upper surface and lower surface) of the outer frame body 4 (first outer members 8a, 8c and second outer members 8b, 8d), the lower surface of the first inner member 52a, and The upper surfaces of the second inner members 52b and 52c are processed to be flat. Further, both end portions of the first outer members 8a and 8c and the second outer members 8b and 8d are connected and fixed so as to enter each other, and the first outer members 8a and 8c and the second inner members 52b and 52c enter each other. The second outer members 8b and 8d and the first inner member 52a are connected and fixed so as to enter each other, and in addition, the intersecting portions of the first inner member 52a and the second inner members 52b and 52c enter each other. In this way, what is shown in FIG. 13 (a) and FIG. 14 (a) is completed. The metal decorative body 4C manufactured in this way can be finished in a complicated form, and a curved shape can be used as the inner member 2 (52a to 52c). Can be produced, and it is possible to manufacture a metallic ornament body 2D having a higher-class feeling.

  What was completed in this way can be processed as shown in FIG. 13, for example, and can be completed as a decorative unit body. That is, a portion protruding outward from the outer frame body 4 is cut as indicated by a two-dot chain line 62 (62a to 62d) to finish the rectangular metal decorative body 2C shown in FIG. 8, and this metal decorative body 2C. Can be accommodated in, for example, a rectangular frame main body 64 and fixed by welding, and thus applied to the decoration unit 66.

  Such a decoration unit 66 can be widely used as a decoration such as a wall surface or a door, or as a part of a door or a partition. The metallic decorative body 2 can be used as a wall decoration or the like without being stored in the frame main body 64.

  Further, for example, it can be processed as shown in FIG. 14 to complete the decoration unit body 76 in another form. That is, the first inner member protruding from the outer frame body 4 while cutting the portion of the outer member 8 (8a to 8d) protruding outward from the outer frame body 4 as indicated by a two-dot chain line 72 (72a to 72d). Both end portions of 52a are cut as indicated by two-dot chain lines 72b and 72d, and both end portions of second inner members 52b and 52c protruding outward from the outer frame body 4 are bent to the other surface side of the outer frame body 4. In this case, the protrusion mounting portion 74 (only the one provided on the upper end side in FIG. 14B is shown) may be used, and the protrusion mounting portion 74 may be used for mounting on a wall surface or the like.

  In the embodiment shown in FIG. 14, the both ends of the second inner members 52b and 52c are used as the projecting mounting portions 74, but instead of such a configuration, the outer members 8 (8a to 8d) are used. The both end portions may be left and the remaining both end portions may be bent to the other surface side of the outer frame body 4 so as to be used as projecting mounting portions, or the first and second inner members 52a to 52c are left. It is good also as a protrusion attachment part, and also it is good also as a protrusion attachment part, leaving all the outer side members 8 (8a-8d) and the inner side members (52a-52c).

  Moreover, the decoration unit body 76 shown in FIG.14 (b) can be comprised as a decoration unit coupling body (not shown) which has intermediate | middle space using two of these. In this case, the back side of the decorative unit body 76 (that is, the side on which the protruding mounting portion 74 is provided) is made to correspond to each other, and the protruding mounting portion 74 of the decorative unit body 76 on one side and the protruding of the other decorative unit body 76. What is necessary is just to connect and connect the attachment part 74 with welding mutually, By comprising in this way, a decoration unit coupling body with higher decorativeness can be manufactured, and it can apply as a door, a partition, etc.

  As mentioned above, although various embodiment of the metal decoration body manufactured by the manufacturing method according to this invention was described, this invention is not limited to these embodiment, Various changes thru | or corrections do not deviate from the scope of the present invention. Is possible.

  For example, in the manufacturing method described above, both end portions of the inner member are inserted into the outer frame body (outer member) and connected and fixed. However, it is not always necessary to enter both ends of the inner member into the outer frame body. By biting a part of the side member into the outer frame body, the inner member and the outer frame body can be connected and fixed with a required strength.

  In the above-described embodiment, the outer frame body is first manufactured by the outer member, and then the inner member is disposed inside the outer frame body and fixed by welding, but the outer frame body is manufactured. However, a metal decorative body with high design can also be produced as follows.

  For example, when a decorative body is manufactured using a first member having a large outer diameter and a second member having a small outer diameter, first, a specific member (either the first member or the second member may be used, but the outer diameter is large). The first member is preferred, and the first member and the second member are arbitrarily selected for this specific member at an appropriate interval in the longitudinal direction (this longitudinal direction becomes the first direction). The first intermediate body is manufactured by fixing by welding (for example, spot welding) (first superposition welding process), and then the first intermediate body is turned upside down and welded and fixed to a specific member. The first member and the second member are arbitrarily selected at an appropriate interval in the longitudinal direction of the member (this longitudinal direction is the second direction, and the second direction is, for example, a direction perpendicular to the first direction). Then, the second intermediate body is manufactured by fixing by welding (for example, spot welding). At this time, all of the intersections between the first and second members extending in the first direction and the first and second members extending in the second direction may be fixed by welding, but since press working is performed later. The intersections may be fixed by welding every other one or two.

  In this case, it is preferable to arrange the first and second members extending in the second direction on one side of the first and second members extending in the first direction, but one of the first and second members extending in the second direction. The part may be disposed on one side of the first and second members extending in the first direction, and the remaining part may be disposed on the other side of the first and second members extending in the first direction.

  Thereafter, the second intermediate body is subjected to press working (forging process) to forge-connect the first and second members extending in the first direction and the first and second members extending in the second direction (forging connecting step). Even in this manner, a metal decorative body substantially similar to the metal decorative body described above can be manufactured.

  In addition, in the metal decorative body manufactured in this way, since the manufactured one tends to be large, a part having a desired size and a desired design is cut out from the metal decorative body as a metal decorative body. Will be used.

2, 2A, 2B, 2C Metal decorative body 4 Outer frame body 6, 6a, 6b, 32a, 32b, 32c, 34a, 34b, 34c, 52a, 52b, 52c Inner member 8a, 8b, 8c, 8d Outer member

Claims (6)

A method for producing a metallic decorative body comprising an outer frame body constituted by a plurality of outer members and an inner member disposed inside the outer frame body,
An outer frame body manufacturing step of manufacturing the outer frame body by superimposing and welding the plurality of outer members, and disposing at least a part of the inner frame inside the outer frame body A superposition welding step of superposing and welding with a part of the superposition welding step, and a forging connection step of forging and connecting the outer frame body and the inner member by pressing the outer frame body and the inner member after the superposition welding step. A method for producing a metallic decorative body.   The plurality of outer members include a first outer member extending in a first direction and a second outer member extending in a second direction perpendicular to the first direction, and the second outer member includes the first outer member. The outer member is disposed on one side of the outer frame body and fixed by welding, and the inner member is disposed on the one surface side of the outer frame body and disposed on the first outer member or the outer member. The method for manufacturing a metal decorative body according to claim 1, wherein the metal decorative body is disposed on the other side of the frame and fixed to the second outer member by welding.   The inner member includes a first inner member extending in the first direction and a second inner member extending in the second direction, and the first inner member is the second member on the other side of the outer frame body. 3. The metal-made metal according to claim 2, wherein the second inner member is fixed to the outer member by welding, and the second inner member is fixed to the first outer member by welding on the one surface side of the outer frame body. A method for manufacturing a decorative body.   The outer member and the inner member are each composed of a rod-shaped member having a substantially circular cross section, and the outer diameter of the outer member is larger than the outer diameter of the inner member. A method for producing a metal decorative body according to claim 1. A metal decorative body manufacturing method for manufacturing a decorative body by interconnecting a first member having a large outer diameter and a second member having a smaller outer diameter than the first member,
A superposition welding step of superposing and welding the first and second members extending in a first direction and the first and second members extending in a second direction different from the first direction; and And a forging connecting step of forging and connecting the first and second members extending in the first direction and the first and second members extending in the second direction by press working. A method for producing a metallic decorative body. 6. The first and second members extending in the second direction are overlapped and fixed by welding on one side of the first and second members extending in the first direction. Method for manufacturing a metal decorative body.

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