A quick connection device for steel bar truss and bottom plate

Abstract

The invention discloses a quick connection device for a steel bar truss and a base plate, the quick connection device comprises a support plate, a fixing hole is provided at the center of the support plate, a rotating fastening device is provided in the fixing hole, the rotating fastening device comprises a rotator and a fastener, the fastener is connected to the steel bar truss, the outer shell of the rotator is fixed in the support plate, a rotating shaft is provided in the rotator, a first return spring is sleeved on the rotating shaft, the rotating shaft is rotated after the first return spring is compressed by the rotating shaft, and the top of the rotating shaft is connected to the steel bar truss through the fastener. The beneficial effect is: the rotating fastening device is inserted into the fixing hole of the support plate, and the fastener and the rotator are used to realize the quick connection of the steel bar truss and the base plate. Compared with the existing screw fixing direction, it has the advantage of fast installation speed. At the same time, the support plate increases the contact area between the connecting piece and the base plate, and can more firmly fix the base plate to the bottom of the steel bar truss, providing a safer and more secure fixing method for the initial construction of the floor deck.

Description

Technical Field

[0001] The invention belongs to the connection technology of a steel truss and a bottom plate of a floor deck, and in particular relates to a quick connection device of the steel truss and the bottom plate. Background Art

[0002] A truss formed by connecting the upper chord, lower chord and web of steel bars by resistance spot welding is called a steel truss. A combined load-bearing plate formed by connecting the steel truss and the bottom plate by resistance spot welding is called a steel truss floor deck. With the rise of prefabricated houses, the bottom plate in the floor deck has begun to be replaced by fiberboard or other new non-metallic materials. In this way, the connection between the bottom plate and the steel truss is achieved by welding a thin iron sheet at the bottom of the steel truss, and then fastening the fiberboard or other new non-metallic materials to the thin iron sheet by self-tapping screws. Since the screw head area of ​​the self-tapping screw is small, the gripping force of the bottom plate is not enough to bear the weight of people walking on it or the weight of poured concrete, and the risk of the bottom plate falling off is prone to occur. The current popular practice is to increase the density of the self-tapping screws, so as to improve the gripping force from point to surface. Then, with the large-scale use of self-tapping screws, it is necessary to tighten the self-tapping screws manually, which is labor-intensive, time-consuming and labor-intensive. Summary of the invention

[0003] The objective of the present invention is to solve the technical problems in the prior art that the self-tapping screws have a small screw head area, the gripping force on the base plate is insufficient to bear the weight of people walking on it or the weight of poured concrete, and the risk of the base plate falling off is easy to occur; and the large-scale use of self-tapping screws requires manual tightening of the self-tapping screws, which is labor-intensive and time-consuming.

[0004] In order to achieve the above object, the present invention provides a quick connection device between a steel bar truss and a bottom plate.

[0005] The specific technical solution adopted by the present invention is:

[0006] A quick connection device for a steel bar truss and a base plate, the quick connection device includes a support plate, a fixing hole is provided in the center of the support plate, a rotating fastening device is provided in the fixing hole, the rotating fastening device includes a rotator and a fastener, the fastener is connected to the steel bar truss, the outer shell of the rotator is fixed in the support plate, a rotating shaft is provided in the rotator, a first return spring is sleeved on the rotating shaft, the rotating shaft is rotated after the first return spring is compressed by the rotating shaft, and the top of the rotating shaft is connected to the steel bar truss through the fastener to fix the base plate between the support plate and the truss.

[0007] Furthermore, the fastener is provided with a flange or a notch. When the rotating shaft is rotated after compressing the first return spring, the flange or the notch is clamped together with the steel truss, and the top of the first return spring that tightens the fastener on the steel truss is limited to the bottom of the fastener, and the bottom of the first return spring is limited in the rotator.

[0008] Furthermore, the steel bar truss is provided with a groove, and the fastener is provided with a flange. When the rotating shaft is rotated after compressing the first return spring, the flange is clamped together with the groove.

[0009] Furthermore, the fastener is provided with a circular ring, and a spiral clamping interface is provided on the wall of the circular ring. When the rotating shaft is rotated after compressing the first return spring, the spiral clamping interface is clamped on the steel bar truss.

[0010] Furthermore, the fastener is provided with a pair of jaws, which are symmetrically hinged on a cylindrical core shaft. The core shaft is provided with the rotating shaft, and a cam is fixed on the rotating shaft. When the cam rotates, the jaws are pushed to close, and the first return spring is sleeved on the cam shaft.

[0011] Furthermore, a pair of push rods are symmetrically provided on both sides of the cam, one end of the push rod is connected to the cam, and the other end is connected to the bottom of the clamping jaw, and the core shaft is also provided with a second return spring for keeping the clamping jaw open.

[0012] Furthermore, the rotator is provided with a tubular shell, and the shell is provided with a clamping protrusion. When the quick connection device is inserted into the fixing hole, the clamping protrusion clamps the shell into the fixing hole of the support plate.

[0013] Furthermore, the clamping protrusion is provided with multiple layers to adjust the gap between the support plate and the steel bar truss.

[0014] Furthermore, the inner wall of the shell is provided with an internal thread, and the rotating shaft is provided with an external thread matching with the thread, and the internal thread matches with the external thread so that the rotating shaft can rise or fall when rotating.

[0015] Furthermore, the first return spring is arranged between the external thread and the fastener.

[0016] The positive effect of the present invention is that the fastening device is inserted into the fixing hole of the support plate by rotating it, and the fastener and the rotator are used to realize the rapid connection between the steel truss and the base plate. Compared with the existing screw fixing direction, it has the advantage of fast installation speed. At the same time, the support plate increases the contact area between the connecting part and the base plate, and can more firmly fix the base plate to the bottom of the steel truss, providing a safer and more secure fixing method for the initial construction of the floor deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a first embodiment of a quick connection device for a steel bar truss and a bottom plate of the present invention;

[0018] Figure 2 yes Figure 1 The three-dimensional schematic diagram of the first embodiment of a quick connection device between a steel truss and a bottom plate of the present invention is shown in FIG.

[0019] Figure 3 yes Figure 2 A schematic diagram of the structure of a rotator of a first embodiment of a quick connection device between a steel truss and a bottom plate of the present invention is shown in FIG.

[0020] Figure 4 yes Figure 3 A bottom view of the rotating shaft of the rotator of the first embodiment of a quick connection device between a steel truss and a bottom plate of the present invention is shown in FIG.

[0021] Figure 5 It is a schematic diagram of a second embodiment of a quick connection device between a steel bar truss and a bottom plate of the present invention;

[0022] Figure 6 It is a schematic diagram of a third embodiment of a quick connection device for a steel bar truss and a bottom plate of the present invention;

[0023] Figure 7 yes Figure 6 Enlarged view of point E in the middle;

[0024] Figure 8 It is a schematic diagram of the cam and push rod structure of a third embodiment of a quick connection device between a steel truss and a bottom plate of the present invention;

[0025] Legend: 1—upper chord reinforcement, 2—web reinforcement, 3—lower chord reinforcement, 4—connecting seat, 401—transverse notch, 402—first protrusion, 403—second protrusion, 404—longitudinal notch, 5—bottom plate, 6—baffle, 601—top surface of baffle, 7—support plate, 8—accommodation groove, 9—rotating shaft, 901—rotating shaft flange, 10—rotating shaft end, 1001—mounting hole, 1002—hexagonal end, 11—housing, 1101—convex spring, 1102 —card convex groove, 1103—card convex, 1104—card convex hinge shaft, 1105—limiting protrusion, 12—first return spring, 13—circular ring, 1301—card interface, 14—clamping claw, 1401—second return spring, 1402—clamping claw hinge shaft, 1403—core shaft, 1404—oblique groove, 1405—third return spring, 1406—limiting pad, 1407—cam, 1408—push rod. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0030] Embodiment 1

[0031] A quick connection device for a steel bar truss and a bottom plate, the quick connection device comprises a support plate 7, a fixing hole is provided at the center of the support plate 7, a rotating fastening device is provided in the fixing hole, the rotating fastening device comprises a rotator and a fastener, the fastener is connected to the lower chord steel bar 3 of the steel bar truss, the outer shell 11 of the rotator is fixed in the fixing hole of the support plate 7, a rotating shaft 9 is provided in the rotator, a first return spring 12 is sleeved on the rotating shaft 9, the rotating shaft 9 is rotated after the first return spring 12 is compressed by the rotating shaft 9, the top of the rotating shaft 9 is connected to the lower chord steel bar 3 of the steel bar truss through the fastener, the bottom plate 5 between the support plate 7 and the steel bar truss is fixed, the support plate 7 is fixed in the receiving groove 8 of the bottom plate 5, the fastener is provided with a flange Or notch, when the shaft compresses the first return spring and then rotates the shaft, the flange or notch is clamped together with the steel truss, and the top of the first return spring 12 that is tightened on the steel truss is limited at the bottom of the fastener, and the bottom of the first return spring 12 is limited in the rotator, and the fastening device is inserted into the fixing hole of the support plate 7 by rotating it. The fastener and the rotator are used to achieve a quick connection between the steel truss and the base plate. Compared with the existing screw fixing direction, it has the advantage of fast installation speed. At the same time, the support plate increases the contact area between the connecting part and the base plate, and can more firmly fix the base plate to the bottom of the steel truss, providing a safer and more secure fixing method for the initial construction of the floor deck.

[0032] Specifically, Figure 1 , Figure 2 and Figure 3As shown, the steel bar truss includes an upper chord steel bar 1 and a lower chord steel bar 3, the upper chord steel bar 1 and the lower chord steel bar 3 are welded together through the web 2, the lower chord steel bar 3 is welded to the first protrusion 402 and the second protrusion 403 of the connecting seat 4, the connecting seat 4 is provided with a longitudinal notch 404 and a transverse notch 401 at the first protrusion 402 and the second protrusion 403, the fixing device includes a baffle 6, and a shaft flange 901 fixed on the shaft 9, when in use, the shaft flange 901 rises upward under the push of the shaft 9, passes through the transverse notch 401, rotates 90 degrees clockwise, and is then clamped in the longitudinal notch 404, because the housing 1 1 is fixed together with the support plate 7, so when the rotating shaft 9 fixes the housing 11 on the lower chord steel bar 3, the support plate is also fixed, and the bottom plate 5 located between the support plate 7 and the steel bar truss is also fixed to the bottom of the lower chord steel bar 3, wherein, when the rotating shaft flange 901 rises upward under the push of the rotating shaft 9, passes through the transverse notch 401, rotates 90 degrees clockwise and is clamped in the longitudinal notch 404, the first return spring 12 is compressed, the top surface 601 of the baffle is tightly attached to the bottom surface of the connecting seat 4, and the first return spring 12 firmly presses the shaft flange 901 in the longitudinal notch 404 to prevent it from detaching.

[0033] Embodiment 2

[0034] A quick connection device for a steel bar truss and a bottom plate, the quick connection device comprises a support plate 7, a fixing hole is provided at the center of the support plate 7, a rotating fastening device is provided in the fixing hole, the rotating fastening device comprises a rotator and a fastener, the fastener is connected to the lower chord steel bar 3 of the steel bar truss, the outer shell 11 of the rotator is fixed in the fixing hole of the support plate 7, a rotating shaft 9 is provided in the rotator, a first return spring 12 is sleeved on the rotating shaft 9, the rotating shaft 9 is rotated after the first return spring 12 is compressed by the rotating shaft 9, the top of the rotating shaft 9 is connected to the lower chord steel bar 3 of the steel bar truss through the fastener, the bottom plate 5 between the support plate 7 and the steel bar truss is fixed, the support plate 7 is fixed in the receiving groove 8 of the bottom plate 5, the fastener is provided with a flange Or notch, when the shaft compresses the first return spring and then rotates the shaft, the flange or notch is clamped together with the steel truss, and the top of the first return spring 12 that is tightened on the steel truss is limited at the bottom of the fastener, and the bottom of the first return spring 12 is limited in the rotator, and the fastening device is inserted into the fixing hole of the support plate 7 by rotating it. The fastener and the rotator are used to achieve a quick connection between the steel truss and the base plate. Compared with the existing screw fixing direction, it has the advantage of fast installation speed. At the same time, the support plate increases the contact area between the connecting part and the base plate, and can more firmly fix the base plate to the bottom of the steel truss, providing a safer and more secure fixing method for the initial construction of the floor deck.

[0035] Specifically, Figure 5As shown, the steel truss includes an upper chord steel bar 1 and a lower chord steel bar 3, which are welded together through the web reinforcement 2. A circular ring 13 is provided on the top of the rotating shaft 9, and a spiral clamping interface 1301 is provided on the wall of the circular ring 13. When the rotating shaft 9 compresses the first return spring 12 and then rotates the rotating shaft 9, the spiral clamping interface 1301 is clamped on the steel truss, wherein the blind end position of the spiral clamping interface 1301 is higher than the middle section thereof, so that when the first return spring 12 tightens the circular ring 13 on the lower chord steel bar 3, the circular ring 13 cannot automatically detach from the lower chord steel bar 3. Since the outer shell 11 is fixed together with the support plate 7, the support plate is also fixed after the rotating shaft 9 fixes the outer shell 11 on the lower chord steel bar 3, and the bottom plate 5 located between the support plate 7 and the steel truss is also fixed to the bottom of the lower chord steel bar 3.

[0036] Embodiment 3

[0037] A quick connection device for a steel bar truss and a bottom plate, the quick connection device comprises a support plate 7, a fixing hole is provided at the center of the support plate 7, a rotating fastening device is provided in the fixing hole, the rotating fastening device comprises a rotator and a fastener, the fastener is connected to the lower chord steel bar 3 of the steel bar truss, the outer shell 11 of the rotator is fixed in the fixing hole of the support plate 7, a rotating shaft 9 is provided in the rotator, a first return spring 12 is sleeved on the rotating shaft 9, the rotating shaft 9 is rotated after the first return spring 12 is compressed by the rotating shaft 9, the top of the rotating shaft 9 is connected to the lower chord steel bar 3 of the steel bar truss through the fastener, the bottom plate 5 between the support plate 7 and the steel bar truss is fixed, the support plate 7 is fixed in the receiving groove 8 of the bottom plate 5, the fastener is provided with a flange Or notch, when the shaft compresses the first return spring and then rotates the shaft, the flange or notch is clamped together with the steel truss, and the top of the first return spring 12 that is tightened on the steel truss is limited at the bottom of the fastener, and the bottom of the first return spring 12 is limited in the rotator, and the fastening device is inserted into the fixing hole of the support plate 7 by rotating it. The fastener and the rotator are used to achieve a quick connection between the steel truss and the base plate. Compared with the existing screw fixing direction, it has the advantage of fast installation speed. At the same time, the support plate increases the contact area between the connecting part and the base plate, and can more firmly fix the base plate to the bottom of the steel truss, providing a safer and more secure fixing method for the initial construction of the floor deck.

[0038] Specific as Figure 6 and 7As shown, the steel bar truss includes an upper chord steel bar 1 and a lower chord steel bar 3, which are welded together through a web rib 2, and the fastener is provided with a pair of clamping jaws 14, and the clamping jaws 14 are symmetrically hinged on a cylindrical mandrel 1403 through a clamping jaw hinge shaft 1402, and a second return spring 1401 is provided on the mandrel 1403 for keeping the clamping jaw in an open state, and a rotating shaft 9 is provided in the mandrel 1403, and an inclined groove 1404 is provided on the top of the rotating shaft 9. When the rotating shaft is rotated, the inclined groove 1404 moves upward and pushes the bottom of the clamping jaw 14 to use the clamping jaw hinge shaft 1402 as a fulcrum and away from the mandrel 1403 through the inclined surface. In this way, the top of the clamp 14 is moved inward, and the lower chord steel bar 3 is fixed in the restricted space formed by the clamp 14 and the core shaft 1403, so that the rotating fastening device is fixed on the lower chord steel bar 3, wherein the inclined groove 1404 is provided with a third reset spring, which is used to keep the clamp 14 from being closed during installation, so as to avoid the clamp being unable to be installed on the lower chord steel bar 3. Since the shell 11 is fixed together with the support plate 7, when the rotating shaft 9 fixes the shell 11 on the lower chord steel bar 3, the support plate is also fixed, and the bottom plate 5 located between the support plate 7 and the steel truss is also fixed to the bottom of the lower chord steel bar 3.

[0039] In particular, such as Figure 8 As shown, a cam 1407 is fixed on the rotating shaft 9. When the cam 1407 rotates, it pushes the clamping jaw 14 to close. Specifically, the first return spring 12 is sleeved on the cam 1407, and a pair of push rods 1408 are symmetrically provided on both sides of the cam 1407. One end of the push rod 1408 is connected to the cam 1407, and the other end is connected to the bottom of the clamping jaw 14. There is also a second return spring 1401 on the core shaft 1 to keep the clamping jaw open.

[0040] 1—upper chord steel bar, 2—web reinforcement, 3—lower chord steel bar, 4—connecting seat, 401—transverse notch, 402—first protrusion, 403—second protrusion, 404—longitudinal notch, 5—bottom plate, 6—baffle, 601—top surface of baffle, 7—support plate, 8—accommodating groove, 9—rotating shaft, 901—rotating shaft flange, 10—rotating shaft end, 1001—mounting hole, 1002—hexagonal end, 11—housing, 1101—convex spring, 1102 —card convex groove, 1103—card convex, 1104—card convex hinge shaft, 1105—limiting protrusion, 12—first return spring, 13—circular ring, 1301—card interface, 14—clamping claw, 1401—second return spring, 1402—clamping claw hinge shaft, 1403—core shaft, 1404—oblique groove, 1405—third return spring, 1406—limiting pad, 1407—cam, 1408—push rod.

[0041] Embodiment 4

[0042] Based on any one of the embodiments 1 to 3, Figure 3 As shown, the rotator is provided with a tubular shell 11, and a latching protrusion 1103 is provided on the shell 11. The latching protrusion 1103 is hinged in a latching protrusion groove 1102 on the shell wall through a latching protrusion hinge shaft 1104. A latching protrusion spring 1101 is provided at the bottom of the latching protrusion 1103, so that the latching protrusion is always in a state of protruding outward. A limiting protrusion 1105 is provided at the lower part of the latching protrusion. When the quick connecting device is inserted into the fixing hole, the support plate 7 is fixed between the latching protrusion 1103 and the limiting protrusion 1105, and the latching protrusion 1103 clamps the shell 11 in the fixing hole of the support plate 7.

[0043] Furthermore, the clamping protrusion 1103 is provided with multiple layers to adjust the gap between the support plate and the steel bar truss.

[0044] Furthermore, the rotating shaft 9 is provided with a rotating shaft end 10, such as Figure 4 As shown, the shaft end 10 is provided with a hexagonal end 1002, and a mounting hole 1001 is provided at the bottom of the hexagonal end 1002. The mounting hole 1001 is provided with threads or filling materials. When decoration is carried out, the fixing bolts or expansion screws used for hanging can be fixed in the mounting hole 1001 to realize the punch-free operation of decoration and avoid damage to the load-bearing plate during the decoration process. At the same time, since the shaft end 10 is connected to the lower chord steel bar 3, such a fixed hanging method is more secure and reliable than traditional collision bolts.

[0045] The foregoing has broadly outlined some aspects and features of various embodiments, which should be interpreted as merely illustrative of various potential applications. Other beneficial results may be obtained by applying the disclosed information in different ways or by combining various aspects of the disclosed embodiments. Other aspects and a more comprehensive understanding may be obtained by a detailed description of the exemplary embodiments in conjunction with reference to the accompanying drawings, within the scope defined by the claims.

[0046] The above embodiments have been described in detail. Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, reductions, and substitutions made by relevant technicians within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A quick connection device for a steel bar truss and a bottom plate, characterized in that: The quick connection device comprises a support plate, a fixing hole is provided in the center of the support plate, a rotating fastening device is provided in the fixing hole, the rotating fastening device comprises a rotator and a fastener, the fastener is connected to the steel truss, the outer shell of the rotator is fixed in the support plate, a rotating shaft is provided in the rotator, a first return spring is sleeved on the rotating shaft, the rotating shaft is rotated after the first return spring is compressed by the rotating shaft, the top of the rotating shaft is connected to the steel truss through the fastener, the bottom plate between the support plate and the truss is fixed, the fastener is provided with a flange or a notch, when the rotating shaft is rotated after the first return spring is compressed by the rotating shaft, the flange or the notch is clamped together with the steel truss, the top of the first return spring that tightens the fastener on the steel truss is limited at the bottom of the fastener, and the bottom of the first return spring is limited in the rotator; the steel truss comprises an upper chord steel bar and a lower chord steel bar, the upper chord steel bar and the lower chord steel bar are connected by web reinforcement The lower chord steel bar is welded together with the first protrusion and the second protrusion of the connecting seat. The connecting seat is provided with a longitudinal notch and a transverse notch on the first protrusion and the second protrusion. The fixer includes a baffle and a shaft flange fixed on the shaft. The shaft flange rises upward under the push of the shaft, passes through the transverse notch, rotates 90 degrees clockwise and is clamped in the longitudinal notch. The outer shell and the support plate are fixed together. When the shaft fixes the outer shell on the lower chord steel bar, the support plate is also fixed. The bottom plate located between the support plate and the steel truss is also fixed to the bottom of the lower chord steel bar. Among them, when the shaft flange rises upward under the push of the shaft, passes through the transverse notch, rotates 90 degrees clockwise and is clamped in the longitudinal notch, the first return spring is compressed, and the top surface of the baffle is tightly attached to the bottom surface of the connecting seat. The first return spring presses the shaft flange into the longitudinal notch to prevent it from detaching.

2. A quick connection device for a steel bar truss and a bottom plate according to claim 1, characterized in that: The rotator is provided with a tubular shell, and a clamping protrusion is provided on the shell. When the quick connection device is inserted into the fixing hole, the clamping protrusion clamps the shell into the fixing hole of the supporting plate.

3. A quick connection device for a steel bar truss and a bottom plate according to claim 2, characterized in that: The clamping protrusion is provided with multiple layers to adjust the gap between the supporting plate and the steel bar truss.

4. A quick connection device for a steel bar truss and a bottom plate according to claim 3, characterized in that: The inner wall of the shell is provided with an internal thread, and the rotating shaft is provided with an external thread matched with the thread. The internal thread and the external thread match to enable the rotating shaft to rise or fall when rotating.

5. A quick connection device for a steel bar truss and a bottom plate according to claim 4, characterized in that: The first return spring is arranged between the external thread and the fastener.

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