JPH0657998U - Fixing structure of cast-resistant members to steel members - Google Patents

Abstract

(57) [Abstract] [Purpose] The amount of welding when using a difficult-to-weld cast member is reduced to improve the manufacturability of composite structures and
Manufacturing synthetic structures economically. [Structure] A metal-embedded member 3 having good weldability is fixed to a portion of the difficult-to-weldable cast member 1 to be welded with a steel member 2 by casting, and the metal-embedded member 3 is fixed to the steel member 2.
On the other hand, it is fixed by spot welding 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a difficult-to-weldability method that is used when a composite structure of steel members and concrete is manufactured by fixing a hard-to-weld casting member in place on a steel member and then placing a concrete. The present invention relates to a structure for fixing a cast member to a steel member.

[0002]

[Prior art]

 In order to fix a steel member having good weldability to a predetermined position of another steel member, spot welding is a simple fixing means. On the other hand, cast iron castings such as ordinary cast iron, tough cast iron, alloy cast iron, spheroidal graphite cast iron, malleable cast iron, chill cast iron and alloy casts such as copper alloy casts, light alloy casts, and other alloy casts It is difficult to firmly bond the member and the steel member by welding. By increasing the amount of welding, a certain degree of welding strength can be expected, but cracks easily occur in the welded part due to impact, and when the amount of welding increases, welding distortion occurs, resulting in a marked decline in product performance. Furthermore, in recent years, welding materials suitable for various castings have been developed, but these welding materials are very expensive and their weldability is inferior to that of steel materials. For this reason, conventionally, a discarded material having good weldability is fixed to a difficult-to-weld casting member, or is fixed by mechanical means such as bolt connection. FIG. 14 shows a fixing structure of a castable joint metal fitting 6 in a composite segment using a steel waste material 5 having good weldability, and the castable metal joint metal fitting 6 is a steel segment main body. And a middle portion of a pair of U-shaped steel scraps 5 abutting against a steel member 2 made of steel and welded to a plurality of anchor members 7 fixed to the casting metal fitting 6 made of difficult-to-weld casting. The ends of both legs of the scrap material 5 made of steel are fixed to the steel member 2 by welding 9.

[0003]

[Problems to be solved by the device]

 In the case of the fixed structure using the steel waste material 5, the steel waste material 5 is required, and there are disadvantages that welding 8 and 9 are performed at more places. Further, in the case of a mechanical fixing structure (not shown), a bolt is required, and a drilling process for a screw hole is required, and the manufacturability is not good.

[0004]

[Means for Solving the Problems]

 In order to advantageously solve the above-mentioned problems, in the fixing structure for the steel member of the difficult-to-weld casting member of the present invention, welding is performed at a welding-necessary portion of the hard-to-weld casting member 1 with the steel member 2. The metal-made embedding member 3 having good properties is fixed by casting, and the metal-made embedding member 3 is fixed to the steel member 2 by spot welding 4.

[0005]

【Example】

 5 to 7 show a metallic embedding member 3 having good weldability used in an embodiment of the present invention, in which one end of an embedding member body 11 having a through hole 10 is provided with a locking protrusion. A locking arm 13 having 12 is continuously provided integrally.

FIG. 4 shows a state in which the metal embedding member 3 is locked in the mold 14 and the mold 14 is filled with the cast iron forming the hardly-weldable casting member 1. The locking arm 13 having the locking projections 12 is sandwiched between the upper and lower molds 14, and the embedding member body 11 is embedded on the surface side of the cast iron forming the difficult-to-weld casting member 1. The cast iron is filled in the hole 10 of the main body 11.

After removing the hard-to-weld casting member 1 in which the metal embedding member 3 is cast, from the mold 14, the embedding member body 11 to the locking arm 13 and the cutting line 15 shown in FIG. It may be removed by cutting at a part.

1 to 3 show an embodiment in which the present invention is applied to a synthetic segment, in which a metallic embedding member 3 is cast and fixed to a steel member 2 composed of a steel segment main body. The difficult-to-weld casting member 1 is abutted, and the plurality of metal-embedded members 3 in the difficult-to-weld casting member 1 are fixed to the steel member 2 by spot welding 4. Further, a plurality of anchor members 7 are screwed and connected to the difficult-to-weld casting member 1.

8 to 10 show another example of the metal embedding member 3, in which the projections 16 are integrally provided on both side surfaces of the embedding member main body 11, but other configurations are This is the same as the metallic embedding member 3 shown in FIGS. 5 and 7.

11 to 13 show still another example of the metal embedding member 3, which is a dovetail shape extending on the back surface of the embedding member main body 11 in the longitudinal direction of the embedding member main body 11. Although a locking groove 17 having a cross section is provided, the other structure is the same as that of the metal embedding member 3 shown in FIGS. 5 to 7.

As a means for bringing the metallic embedding member 3 into close contact with the difficult-to-weld casting member 1, a nickel plating is applied to the metallic embedding member 3 to bring it into close contact with the base material of the difficult-to-weld casting member 1. Any means may be used.

[0012]

[Effect of device]

 According to the present invention, a metal-embedded member 3 having good weldability is fixed to a portion of the cast-metal member 1 that is difficult to weld with the steel member 2 by welding, and the metal-embedded member 3 is made of steel. Since it is fixed to the manufacturing member 2 by spot welding 4, the waste material used conventionally is unnecessary, and the amount of welding is reduced, which improves the manufacturability of the synthetic structure and also improves the synthetic structure. You can make things economically.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example in which the present invention is applied to a synthetic segment.

FIG. 2 is a perspective view showing a part of FIG. 1 in an enlarged manner.

3 is an enlarged perspective view showing a part of FIG. 2. FIG.

FIG. 4 is a vertical cross-sectional side view showing a state in which a metal embedding member is set in a mold.

FIG. 5 is a side view showing a metal embedding member.

FIG. 6 is a front view of the metallic embedding member shown in FIG.

FIG. 7 is a bottom view of the metallic embedding member shown in FIG.

FIG. 8 is a side view showing another example of the metallic embedding member.

9 is a front view of the metallic embedding member shown in FIG. 8. FIG.

10 is a bottom view of the metal embedding member shown in FIG. 8. FIG.

FIG. 11 is a side view showing still another example of the metal embedding member.

12 is a front view of the metallic embedding member shown in FIG. 11. FIG.

13 is a bottom view of the metal embedding member shown in FIG. 11. FIG.

FIG. 14 is a perspective view showing a conventional fixing structure for a castable member made of spheroidal graphite cast iron and a steel member in a synthetic segment.

[Explanation of symbols]

 1 Difficult-to-weld cast member 2 Steel member 3 Metal embedding member 4 Spot welding 7 Anchor member 10 Hole 11 Embedding member body 12 Locking protrusion 13 Locking arm 14 Mold 15 Cutting line 16 Protrusion 17 Locking groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Arata 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation

Claims (1)

[Scope of utility model registration request] 1. A steel member 2 in a difficult-to-weld casting member 1.
A weldable cast product in which a metal embedding member 3 having good weldability is fixed to a steel member 2 by welding with a spot, and the metal embedding member 3 is fixed to a steel member 2 by spot welding 4 at a place where welding is required. Fixing structure for steel members.