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CN-121992913-A - Double joists

CN121992913ACN 121992913 ACN121992913 ACN 121992913ACN-121992913-A

Abstract

The application relates to a double joist, which relates to the field of building components and comprises two joist bodies, wherein each joist body comprises a vertical plate and a transverse plate with upper and lower surfaces connected, a plurality of screw rods are inserted onto the two joist bodies together, a sleeve is sleeved on each screw rod, nuts are connected onto both ends of each screw rod in a threaded manner, clamping pieces for limiting the nuts are connected onto side walls, away from each other, of the two vertical plates in a sliding manner, a circle of ring steel is connected onto each upper transverse plate, a gear positioned in the ring steel is connected onto the upper surface of the upper transverse plate in a rotating manner, a transmission rack arranged vertically is connected onto the clamping pieces, the transmission gear penetrates through the upper transverse plate and is meshed with the gear, a driving rack penetrates through the upper transverse plate and is inserted onto the upper transverse plate in a sliding manner, the driving rack is positioned between the two vertical plates and is meshed with the gear, a driving assembly for driving the driving rack to move along the vertical direction is arranged on the sleeve, and the driving assembly has a self-locking function. The application has the effect of stabilizing the structure of the double joists.

Inventors

  • ZHANG WEI

Assignees

  • 万鸣建筑材料有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (8)

  1. 1. The double joist comprises two I-shaped beam bodies (1) which are parallel to each other, wherein each beam body (1) comprises a vertical plate (12) and a transverse plate (11) connected with the upper surface and the lower surface of the vertical plate (12), a plurality of screw rods (3) are inserted onto the two beam bodies (1) together, a sleeve (2) positioned between the two beam bodies (1) is sleeved on each screw rod (3), nuts (31) are connected with two ends of each screw rod (3) in a threaded manner, and the two beam bodies (1) are positioned between the two nuts (31), and the double joist is characterized in that clamping pieces (4) for limiting the nuts (31) are connected onto side walls, away from each other, of the two vertical plates (12) in a sliding manner, and the sliding directions of the clamping pieces (4) are arranged along the vertical direction; All be connected with round ring steel (5) on diaphragm (11) of top, the rotation of diaphragm (11) upper surface of top is connected with gear (7) that are arranged in ring steel (5), be connected with vertical transmission rack (6) on fastener (4), transmission rack (7) run through diaphragm (11) of top and with gear (7) meshing, run through and slip grafting have initiative rack (8) with transmission rack (6) one-to-one on diaphragm (11) of top, initiative rack (8) are located between two risers (12), initiative rack (8) also meshes with gear (7), be equipped with drive assembly (9) that drive initiative rack (8) moved along vertical direction on sleeve (2), drive assembly (9) have the auto-lock function.
  2. 2. The double joist according to claim 1 wherein the clip member (4) comprises a horizontally disposed support plate (41), the support plate (41) is slidably connected with the riser (12), the sliding direction of the support plate (41) is along the vertical direction, the support plate (41) is located below the upper transverse plate (11), a side plate (42) is fixedly connected to one side of the support plate (41) away from the riser (12), and the lower surface of the side plate (42) is gradually inclined downwards along the direction away from the riser (12).
  3. 3. The double joist according to claim 2, wherein the side wall of the support plate (41) close to the vertical plate (12) is fixedly connected with a T-shaped sliding block (411), the vertical plate (12) is provided with a sliding groove (121) matched with the sliding block (411), the length direction of the sliding groove (121) is arranged along the vertical direction, and the sliding block (411) is slidably inserted into the sliding groove (121).
  4. 4. A double joist according to any one of claims 1 to 3 wherein the drive assembly (9) comprises a limit spring (92) connected with the lower end face of the driving rack (8), the upper end of the limit spring (92) is fixed with the lower surface of the upper transverse plate (11), the lower end of the driving rack (8) is hinged with a hinge rod (93), one end of the hinge rod (93) far away from the driving rack (8) is hinged with a connecting block (94), one end of the hinge rod (93) close to the connecting block (94) is inclined towards the direction far away from the vertical plate (12), a fixing block (95) is connected to the connecting block (94) in a sliding manner, the fixing block (95) and the connecting block (94) can move relatively in the vertical direction, the fixing block (95) is connected with the sleeve (2) in a sliding manner, the fixing block (95) and the sleeve (2) move relatively in the horizontal direction, a fixing groove (22) matched with the fixing block (95) is further formed in the sleeve (2), and the fixing block (95) and the sleeve (2) are fixed.
  5. 5. The double joist according to claim 4, wherein the connecting block (94) is a T-shaped connecting block (94), the fixing block (95) is provided with a connecting groove (951) adapted to the connecting block (94), the length direction of the connecting groove (951) is arranged along the vertical direction, and the connecting block (94) is slidably inserted into the connecting groove (951).
  6. 6. The double joist according to claim 4, wherein the sleeve (2) is provided with a sliding groove (21) adapted to the fixing block (95), the sliding groove (21) is arranged along the arrangement direction of the two joist bodies (1) along the length direction, and the fixing block (95) is slidably inserted into the sliding groove (21).
  7. 7. A double joist according to claim 4, wherein said fixing block (95) is in an interference fit with said fixing groove (22).
  8. 8. The double joist according to claim 4, wherein the lower end of the driving rack (8) is fixedly connected with a supporting plate (91), the diameter of the supporting plate (91) is larger than the diameter of the circumcircle of the driving rack (8), a limit spring (92) is sleeved on the driving rack (8), and the lower end of the limit spring (92) is fixed with the upper surface of the supporting plate (91).

Description

Double joists Technical Field The application relates to the field of building components, in particular to a double joist. Background The double joist is a common building member of factory building, generally comprises two H-shaped beam bodies which are parallel to each other, the two beam bodies are connected and fixed through three groups of bolts and nuts, the three groups of bolts and nuts are arranged along the length direction of the beam bodies, each bolt corresponds to two nuts, the bolts penetrate through the two beam bodies, the two ends of each bolt are connected with the nuts in a threaded manner, the two beam bodies are located between the two nuts, sleeves located between the two beam bodies are sleeved on the bolts, and the two ends of each sleeve are in contact with the corresponding beam bodies. Because the production environment of factory building is vibrations usually, leads to roof beam body, bolt and nut also to vibrate, and the nut can take place not hard up with the bolt under the effect of vibrations, leads to the structure of double joist unstable. Disclosure of Invention In order to make the structure of the double joist more stable, the application provides the double joist. The application provides a double joist which adopts the following technical scheme: The double joists comprise two H-shaped beam bodies which are parallel to each other, wherein each beam body comprises a vertical plate and a transverse plate with upper and lower surfaces connected with each other, a plurality of screw rods are inserted onto the two beam bodies together, a sleeve between the two beam bodies is sleeved on each screw rod, nuts are connected to two ends of each screw rod in a threaded manner, the two beam bodies are positioned between the two nuts, clamping pieces for limiting the nuts are connected to side walls, away from each other, of the two vertical plates in a sliding manner, and the sliding directions of the clamping pieces are arranged along the vertical direction; The upper transverse plate is connected with a circle of ring steel, the upper surface of the upper transverse plate is rotationally connected with a gear positioned in the ring steel, the clamping piece is connected with a vertically arranged transmission rack, the transmission gear penetrates through the upper transverse plate and is meshed with the gear, the upper transverse plate is penetrated through and is in sliding connection with a driving rack in one-to-one correspondence with the transmission rack, the driving rack is positioned between the two vertical plates and is meshed with the gear, the sleeve is provided with a driving assembly for driving the driving rack to move along the vertical direction, and the driving assembly has a self-locking function. Through the technical scheme, in an initial state, the driving assembly limits the limiting piece through the driving rack, the gear and the driven rack, the limiting piece is located on the upper portion of the vertical plate, the position of the vertical plate for installing the nut is exposed, the situation of blocking the nut is reduced, when the bolt, the sleeve and the nut are installed, the driving assembly is controlled to work, the driving rack moves upwards, the driving rack drives the gear to engage, the gear drives the driving rack and the clamping piece to move downwards until the clamping piece moves in place, the clamping piece limits and clamps the nut, at the moment, the driving assembly is self-locking, so that the clamping piece keeps the position of the nut at the moment, the situation that the nut is loose due to vibration of the beam body, the screw and the nut is reduced, and the structure of the double-joist is more stable. Optionally, the chucking spare includes the extension board that the level set up, extension board and riser sliding connection, and the slip direction of extension board sets up along vertical direction, and the extension board is located the diaphragm below of top, and one side fixedly connected with curb plate of extension board keeping away from the riser, the lower surface of curb plate is along keeping away from the direction of riser and slope down gradually. Through adopting above-mentioned technical scheme, during initial state, extension board and curb plate are close to the diaphragm of top, screw up the back in place when the nut, the terminal surface that the riser was kept away from to the nut and the lower surface contact of curb plate slope, and the terminal surface that the riser was kept away from to the nut is located the lower surface middle part of curb plate slope, along with extension board and curb plate down move, when the curb plate moved the lateral wall that is close to the riser and contacted with the nut, the curb plate supports tightly with the nut to can carry out spacingly to the nut. Optionally, fixedly connected with T-shaped slider on the lateral wall that the extension board is close