Truss facilitating extension erection

Abstract

A truss for easy extension includes a main truss and a first extension frame disposed at one end of the main truss. The main truss includes a first upper chord and a first lower chord spaced apart, and a support member disposed between and fixedly connected to the first upper chord and the first lower chord. The first extension frame includes a second lower chord and a first diagonal member. The second lower chord is connected to the first lower chord by a pin. The upper end of the first diagonal member is connected to the first upper chord or the support member. The lower end of the first diagonal member is connected to the second lower chord, or the lower end of the first diagonal member is connected to the upper end of a first vertical member connected to the second lower chord. The lower end of the first vertical member is connected to the second lower chord. The lower end of the first diagonal member is lower than the first upper chord.

Description

Technical Field

[0001] This utility model relates to the field of building construction equipment technology, and in particular to a truss that is easy to extend and build. Background Technology

[0002] During the construction of cast-in-place concrete beams, a support frame system is required to support the cast-in-place formwork. This support frame system mainly uses Bailey bridge trusses as support beams. Columns are installed below the support beams composed of Bailey bridge sections to support them, and the support beams typically extend beyond the columns. In actual construction, the length of the support beams sometimes does not correspond properly to the position of the columns, resulting in the support beams not extending to the columns. Adding a Bailey bridge section would result in excessive length, and the upper part of the Bailey bridge section would interfere with the external environment, thus creating obstacles to construction. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a truss that is easy to extend and build, overcoming the shortcomings of the existing technology.

[0004] The technical solution adopted in this utility model is a truss that is easy to extend and build, including a main truss and a first extension frame disposed at one end of the main truss. The main truss includes a first upper chord and a first lower chord that are spaced apart, and a support member disposed between the first upper chord and the first lower chord and fixedly connected to the first upper chord and the first lower chord. The first extension frame includes a second lower chord and a first diagonal member. The second lower chord is connected to the first lower chord by a pin. The upper end of the first diagonal member is connected to the first upper chord or the support member. The lower end of the first diagonal member is connected to the second lower chord, or the lower end of the first diagonal member is connected to the upper end of a first vertical member connected to the second lower chord. The lower end of the first vertical member is connected to the second lower chord. The lower end of the first diagonal member is lower than the first upper chord.

[0005] This utility model also includes a second extension frame, which includes a third upper chord and a third lower chord arranged vertically at intervals. The third upper chord and the third lower chord are fixedly connected by two second vertical bars. The third lower chord is connected to the second lower chord, and the third upper chord is connected to the lower end of the first diagonal bar.

[0006] This utility model provides two intersecting reinforcing bars between the third upper chord and the third lower chord. The two ends of the reinforcing bars are fixedly connected to the connection points between the third upper chord and the second vertical bar, and the connection points between the third lower chord and the second vertical bar, respectively.

[0007] The reinforcing rod of this utility model includes a long rod and two short rods. The two short rods are respectively located on both sides of the long rod and are fixedly connected to the middle of the long rod to form an intersection.

[0008] In this invention, the lower surfaces of the first lower chord and the second lower chord are coplanar after they are connected.

[0009] The lower surfaces of the first lower chord, the second lower chord, and the third lower chord of this invention are coplanar after they are connected.

[0010] The first extension frame of this utility model further includes a crossbar, one end of which is fixedly connected to the connection part of the first diagonal bar and the first vertical bar, and the other end of which is connected to the support member.

[0011] The first extension frame of this utility model further includes a second diagonal bar, one end of which is fixedly connected to the connection part of the first diagonal bar and the first vertical bar, and the other end of which is fixedly connected to the connection part of the support member and the second lower chord.

[0012] The reinforcing rod of this utility model also includes a third vertical rod. One end of the third vertical rod is located between the angle between the short rod and the long rod and is fixedly connected to the short rod and the long rod. The other end of the third vertical rod is fixedly connected to the third upper chord rod.

[0013] The main truss, the first extension frame, and the second extension frame of this utility model are connected to form a component. There are two components, which are arranged one in front of the other and are fixedly connected to each other by multiple connecting rods.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model extends the main truss by setting up a first extension frame. Specifically, the second lower chord of the first main truss is connected to the first lower chord by a pin. The upper end of the first diagonal member is connected to the first upper chord or a support member, and the lower end of the first diagonal member is connected to the second lower chord. Alternatively, the lower end of the first diagonal member is connected to the upper end of the first vertical member connected to the second lower chord, and the lower end of the first vertical member is connected to the second lower chord. The inclined first diagonal member achieves the extension of the main truss, allowing the main truss to rest on the columns without occupying the upper space of the main truss. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a structural schematic diagram from another perspective of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figures 1 to 2As shown, the truss for easy extension and construction described in this embodiment includes a main truss 1 and a first extension frame 2 disposed at one end of the main truss 1. The main truss 1 includes a first upper chord 11 and a first lower chord 12 spaced apart, and a support member 13 disposed between the first upper chord 11 and the first lower chord 12 and fixedly connected to the first upper chord 11 and the first lower chord 12. The first extension frame 2 includes a second lower chord 21 and a first diagonal member 22. The second lower chord 21 is connected to the first lower chord 12 by a pin. The upper end of the first diagonal member 22 is connected to the first upper chord 11 or the support member 13, and the lower end of the first diagonal member 22 is connected to the second lower chord 21 or the lower end of the first diagonal member 22. The upper end of the first vertical rod 23, which is connected to the second lower chord 21, is connected to the second lower chord 21; the lower end of the first diagonal rod 22 is lower than the first upper chord 11; the lower surfaces of the first lower chord 12 and the second lower chord 21 are coplanar after they are connected; the first extension frame 2 also includes a horizontal rod 24, one end of which is fixedly connected to the connection between the first diagonal rod 22 and the first vertical rod 23, and the other end of which is connected to the support member 13; the first extension frame 2 also includes a second diagonal rod 25, one end of which is fixedly connected to the connection between the first diagonal rod 22 and the first vertical rod 23, and the other end of which is fixedly connected to the support member 13; the first extension frame 2 also includes a second diagonal rod 25, one end of which is fixedly connected to the connection between the first diagonal rod 22 and the first vertical rod 23, and the other end of which is fixedly connected to the support member 13. The first extension frame 2 is fixedly connected to the support member 13 and the second lower chord 21 at their connection points. In this embodiment, the connection between the first extension frame 2 and the main truss 1 has the following embodiments: Embodiment 1: The second lower chord 21 and the first lower chord 12 are connected by a pin; the upper end of the first diagonal member 22 is connected to the first upper chord 11; and the lower end of the first diagonal member 22 is connected to the second lower chord 21. Embodiment 2: The second lower chord 21 and the first lower chord 12 are connected by a pin; the upper end of the first diagonal member 22 is connected to the first upper chord 11; the lower end of the first diagonal member 22 is connected to the upper end of the first vertical member 23 connected to the second lower chord 21; and the lower end of the first vertical member 23 is connected to the second lower chord 21. Example 3: The second lower chord 21 and the first lower chord 12 are connected by a pin. The upper end of the first diagonal bar 22 is connected to the support member 13, and the lower end of the first diagonal bar 22 is connected to the second lower chord 21. Example 4: The second lower chord 21 and the first lower chord 12 are connected by a pin. The upper end of the first diagonal bar 22 is connected to the support member 13, and the lower end of the first diagonal bar 22 is connected to the upper end of the first vertical bar 23 connected to the second lower chord 21. The lower end of the first vertical bar 23 is connected to the second lower chord 21. The inclined first diagonal bar 22 realizes the extension of the main truss 1, which can allow the main truss 1 to be placed on the column, while not occupying the upper space of the main truss 1.When there is an obstacle or a cantilevered cast-in-place beam near or directly above the column, the inclined first diagonal bar 22 can avoid the cantilevered obstacle or cast-in-place beam, while allowing the second lower chord 21 to fall above the column. The main truss 1 extends to the column through the force of the second lower chord 21.

[0019] This embodiment also includes a second extension frame 3, which includes a third upper chord 31 and a third lower chord 32 arranged vertically at intervals. The third upper chord 31 and the third lower chord 32 are fixedly connected by two second vertical rods 33. The third lower chord 32 is connected to the second lower chord 21, and the third upper chord 31 is connected to the lower end of the first diagonal rod 22. Two intersecting reinforcing rods 34 are provided between the third upper chord 31 and the third lower chord 32. The two ends of the reinforcing rods 34 are fixedly connected to the connection points of the third upper chord 31 and the second vertical rod 33, and the third lower chord 32 and the second vertical rod 33, respectively. Each reinforcing rod 34 includes a long rod 35 and two short rods 36. The two short rods 36 are respectively located on both sides of the long rod 35 and fixedly connected to the middle of the long rod 35, thus forming an intersection. The reinforcing rod 34 also includes a third vertical rod 37. One end of the third vertical rod 37 is located between the angle between the short rod 36 and the long rod 35 and is fixedly connected to both the short rod 36 and the long rod 35. The other end of the third vertical rod 37 is fixedly connected to the third upper chord 31. The first lower chord 12... The second lower chord 21 and the third lower chord 32 are connected and their lower surfaces are coplanar. In this embodiment, the combination of the reinforcing rod 34 with the third upper chord 31 and the third lower chord 32 increases the load-bearing capacity of the second extension frame 3. The third lower chord 32 is connected to the second lower chord 21, and the third upper chord 31 is connected to the lower end of the first diagonal rod 22, thereby connecting the second extension frame 3 with the first extension frame 2, and finally extending the main truss 1 together. Through the two-section extension of the first extension frame 2 and the second extension frame 3, the extension can be carried out by using only the first extension frame 2 or by using the first extension frame 2 and the second extension frame 3 together, depending on the actual required length. The choice is flexible and the application range is wide.

[0020] As a preferred embodiment: the main truss 1, the first extension frame 2, and the second extension frame 3 are connected to form a component. There are two components, which are arranged one in front of the other and are fixedly connected to each other by multiple connecting rods 4. In this embodiment, the arrangement of the two components one in front of the other increases the stress performance of the overall truss in the front-back direction.

Claims

1. A truss that is easy to extend and construct, characterized in that, The system includes a main truss (1) and a first extension frame (2) disposed at one end of the main truss (1). The main truss (1) includes a first upper chord (11) and a first lower chord (12) spaced apart, and a support member (13) disposed between the first upper chord (11) and the first lower chord (12) and fixedly connected to the first upper chord (11) and the first lower chord (12). The first extension frame (2) includes a second lower chord (21) and a first diagonal member (22). The second lower chord (21) is connected to the first lower chord (12) by the first upper chord (11) and the first lower chord (12). The chord (12) is connected by a pin. The upper end of the first diagonal bar (22) is connected to the first upper chord (11) or the support (13). The lower end of the first diagonal bar (22) is connected to the second lower chord (21), or the lower end of the first diagonal bar (22) is connected to the upper end of the first vertical bar (23) connected to the second lower chord (21). The lower end of the first vertical bar (23) is connected to the second lower chord (21). The lower end of the first diagonal bar (22) is lower than the first upper chord (11).

2. The truss that is easy to extend and construct as described in claim 1, characterized in that, It also includes a second extension frame (3), which includes a third upper chord (31) and a third lower chord (32) arranged vertically at intervals. The third upper chord (31) and the third lower chord (32) are fixedly connected by two second vertical rods (33). The third lower chord (32) is connected to the second lower chord (21), and the third upper chord (31) is connected to the lower end of the first diagonal rod (22).

3. The truss that is easy to extend and construct as described in claim 2, characterized in that, Two cross-shaped reinforcing bars (34) are provided between the third upper chord (31) and the third lower chord (32). The two ends of the reinforcing bars (34) are fixedly connected to the connection parts of the third upper chord (31) and the second vertical bar (33) and the connection parts of the third lower chord (32) and the second vertical bar (33), respectively.

4. The truss that is easy to extend and construct as described in claim 3, characterized in that, The reinforcing rod (34) includes a long rod (35) and two short rods (36). The two short rods (36) are respectively located on both sides of the long rod (35) and are fixedly connected to the middle of the long rod (35) to form a cross.

5. The truss that is easy to extend and construct as described in claim 1, characterized in that, After the first lower chord (12) and the second lower chord (21) are connected, their lower surfaces are coplanar.

6. The truss that is easy to extend and construct as described in claim 2, characterized in that, After the first lower chord (12), the second lower chord (21) and the third lower chord (32) are connected, their lower surfaces are coplanar.

7. The truss structure as described in claim 1, characterized in that, The first extension frame (2) also includes a crossbar (24), one end of which is fixedly connected to the connection part of the first diagonal bar (22) and the first vertical bar (23), and the other end of which is connected to the support member (13).

8. The truss that is easy to extend and construct as described in claim 1, characterized in that, The first extension frame (2) also includes a second diagonal bar (25), one end of which is fixedly connected to the connection part of the first diagonal bar (22) and the first vertical bar (23), and the other end of which is fixedly connected to the connection part of the support member (13) and the second lower chord bar (21).

9. The truss that is easy to extend and construct as described in claim 4, characterized in that, The reinforcing rod (34) also includes a third vertical rod (37), one end of which is located between the angle between the short rod (36) and the long rod (35) and is fixedly connected to the short rod (36) and the long rod (35), and the other end of which is fixedly connected to the third upper chord rod (31).

10. The truss for easy extension and construction as described in claim 2, characterized in that, The main truss (1), the first extension frame (2), and the second extension frame (3) are connected to form a component. There are two components, which are arranged one in front of the other and are fixedly connected to each other by multiple connecting rods (4).

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