CN202706326U

CN202706326U - Light steel keel

Info

Publication number: CN202706326U
Application number: CN 201220168465
Authority: CN
Inventors: 马金宝
Original assignee: SHANGHAI HEROISM BUILDING MATERIAL Co Ltd
Current assignee: SHANGHAI HEROISM BUILDING MATERIAL Co Ltd
Priority date: 2012-04-19
Filing date: 2012-04-19
Publication date: 2013-01-30
Anticipated expiration: 2022-04-19

Abstract

The utility model discloses a light steel keel. The cross section of the light steel keel is of a U shape, and the U-shaped light steel keel comprises a strip-shaped U-shaped groove bottom and bending portions, wherein the bending portions are arranged on two end portions along the extending direction of the U-shaped groove bottom. The light steel keel is characterized in that fillet portions are arranged between the U-shaped groove bottom and the bending portions. A plurality of pressing marks are arranged on the inside and/or the outside of the fillet portions. The light steel keel has the advantages that the fillet portions are arranged between the bending portions and the U-shaped groove bottom, and therefore the bending portions are not prone to breakage caused by stress concentration. In addition, compared with traditional right-angle design, the fillet design can save materials used to manufacture the light steel keel; the pressing marks arranged in the fillet portions can save raw materials used to manufacture the light steel keel and achieve the propose of saving cost; and protrusion portions arranged in the U-shaped groove bottom can improve strength of the U-shaped groove bottom of the light steel keel.

Description

Lightgage steel joist

Technical field

The utility model relates to the lightgage steel joist that a kind of building materials field uses.

Background technology

Lightgage steel joist divides channel and cuts off keel by purposes, can divide U-shaped keel, H type keel, V-type keel, C type keel, T-shaped keel, L-type keel by section configuration.

Take U-shaped keel as example, the light-gauge steel section that it adopts the cold bending process bending to form by banded cold-rolled steel sheet, galvanized steel plain sheet or color painted steel strip.In bending is U-shaped process, two kinks and being between the U-shaped trench bottom between the kink design without transition structure, the two is 90 degree states kink and U-shaped trench bottom, and so design easily causes stress to be concentrated, kink easily with U-shaped trench bottom contact portion fracture.

Also there is the lower problem of U-shaped bottom land intensity in traditional lightgage steel joist, and lightgage steel joist is made the cost of production that how much is directly connected to of materials.

The utility model content

The purpose of this utility model is exactly in order to address the above problem, and provides a kind of so that be difficult for the lightgage steel joist of fracture between kink and the U-shaped trench bottom, and makes the effect that this lightgage steel joist has conservation.

To achieve these goals, the utility model adopts following technical scheme:

A kind of lightgage steel joist, the cross section of this lightgage steel joist is U-shaped, described U-shaped lightgage steel joist comprises banded U-shaped trench bottom and the kink that is arranged at the both ends of U-shaped trench bottom bearing of trend, it is characterized in that, is provided with the fillet part between described U-shaped trench bottom and the kink.

The outside of the inboard of described fillet part and/or fillet part is provided with some impressions.

Described impression can be regular figure or irregular figure.

Described impression is band shape or strip.

Described U-shaped trench bottom is provided with the projection towards U-shaped opening direction.

The beneficial effects of the utility model are:

(1) between kink and the U-shaped trench bottom fillet is set, concentrate and rupture so that stress be difficult for to occur kink, and the fillet design can reduces the raw material of making lightgage steel joist with respect to traditional right-angle design;

(2) be located at fillet impression partly, can reduce the raw material of making lightgage steel joist, reach the purpose of saving cost;

(3) lug boss that arranges of U-shaped trench bottom can improve the U-shaped bottom land intensity of lightgage steel joist.

Description of drawings

Fig. 1 is main TV structure schematic diagram of the present utility model among the embodiment one.

Fig. 2 is side-looking structural representation of the present utility model among the embodiment one.

Fig. 3 is I place enlarged drawing among Fig. 2.

Fig. 4 is main TV structure schematic diagram of the present utility model among the embodiment two.

Fig. 5 is side-looking structural representation of the present utility model among the embodiment two.

The specific embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Need to prove, the orientation such as word "up" and "down" that middle use is described below refer in the accompanying drawing upper and lower to, word " interior " and " outward " refer to respectively towards or away from drawing or figure in particular elements geometric center direction.

Embodiment one

As Figure 1-3, a kind of lightgage steel joist that uses as vertical keel, the cross section of this lightgage steel joist is U-shaped, described U-shaped lightgage steel joist comprises banded U-shaped trench bottom 1 and the kink 2a that is arranged at the both ends of U-shaped trench bottom bearing of trend, 2b, be provided with fillet part 3 between described U-shaped trench bottom and the kink, rounding between kink and the U-shaped trench bottom, avoiding this part to suffer external force stress to occur concentrates and fracture, play simultaneously the purpose that saves material, the U-shaped trench bottom of this lightgage steel joist has one towards the projection 11 of U-shaped channel opening direction, it adopts the plate body bending with U-shaped trench bottom to form, be intended to improve the intensity of U-shaped trench bottom, the free end that is positioned at kink 2a is provided with the flanging towards kink 2b direction, and this flanging is positioned at kink 2a, the 2b free end is symmetrical arrangement.

(it is inboard that the fillet part is defined as the fillet part towards U-shaped groove one side in the inboard of described fillet part, fillet partly deviates from U-shaped groove one side and then divides the outside for fillet part) be provided with some impressions 4 that are band shape or strip, described impression one end starts from and divides adjacent U-shaped trench bottom, the other end to terminate in fillet part with fillet part to divide adjacent kink.

For the lightgage steel joist that uses as day ground joist, itself and vertical keel difference are that the free end of kink does not arrange flanging, and it can arrange equally the fillet part and be located at the fillet part between kink and U-shaped trench bottom impression does not repeat them here.

Embodiment two

Shown in Fig. 4-5, a kind of lightgage steel joist that uses as main joist, the cross section of this lightgage steel joist is U-shaped, described U-shaped lightgage steel joist comprises banded U-shaped trench bottom 1 and kink 2a, the 2b that is arranged at the both ends of U-shaped trench bottom bearing of trend, be provided with fillet part 3 between described U-shaped trench bottom and the kink, U-shaped trench bottom is straightened condition.

The interior outside of described fillet part is provided with some band shapes or strip impression 4, and described impression one end starts from and divides adjacent U-shaped trench bottom, the other end to terminate in fillet part with fillet part to divide adjacent kink.

The difference of rider keel and main joist is, the kink free end of rider keel does not arrange flanging, and it can arrange equally the fillet part and be located at the fillet part between kink and U-shaped trench bottom impression does not repeat them here.

Certainly, impression also can be regular figure or irregular figure except above-mentioned form, such as circular, oval, square, trapezoidal, triangle, polygon etc.

The above only is preferred embodiment of the present utility model, and protection domain of the present utility model is not limited in above-mentioned embodiment, and every technical scheme that belongs to the utility model principle all belongs to protection domain of the present utility model.For a person skilled in the art, some improvement of under the prerequisite that does not break away from principle of the present utility model, carrying out, these improvement also should be considered as protection domain of the present utility model.

Claims

1. lightgage steel joist, the cross section of this lightgage steel joist is U-shaped, described U-shaped lightgage steel joist comprises banded U-shaped trench bottom and the kink that is arranged at the both ends of U-shaped trench bottom bearing of trend, it is characterized in that, is provided with the fillet part between described U-shaped trench bottom and the kink.

2. lightgage steel joist according to claim 1 is characterized in that, the outside of the inboard of described fillet part and/or fillet part is provided with some impressions.

3. lightgage steel joist according to claim 2 is characterized in that, described impression can be regular figure or irregular figure.

4. lightgage steel joist according to claim 2 is characterized in that, described impression is band shape or strip.

5. lightgage steel joist according to claim 1 is characterized in that, described U-shaped trench bottom is provided with the projection towards U-shaped opening direction.