Buckling and pressing type connecting piece and steel bar truss floor support plate

Abstract

The buckling and pressing type connecting piece comprises an upper main body used for installing a steel bar truss and a lower main body used for installing a bottom formwork, an installing groove is formed in the center of the upper main body, one side of the installing groove is sunken towards the groove wall to form a buckling groove with a transverse opening, and the other side of the installing groove is provided with an elastic clamping wall; the elastic clamping wall and the groove wall of the other side of the installation groove form a vertically-opened pressing connection groove, and the two lower chord steel bars of the steel bar truss are contained in the buckling connection grooves or the pressing connection grooves in the corresponding sides respectively. During installation, one lower chord steel bar is contained in the buckling groove through the installation groove, then the other lower chord steel bar is pressed downwards into the pressing groove, and when the elastic clamping wall bears downward pressure, the elastic clamping wall elastically deforms in the direction away from the pressing groove, so that the size of the pressing groove opening is increased, and the lower chord steel bars pass through the pressing groove opening. Installation of the steel bar truss and the buckling and pressing type connecting piece can be achieved without other equipment, manual installation is facilitated, and the installation efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of building materials, and in particular to a buckled connector and a steel truss floor deck. Background Art

[0002] At present, most of the assembled steel truss floor decks on the market use metal connectors to connect the steel trusses and floor decks together. In order to ensure the stable support of the steel trusses, the metal connectors and the steel trusses are welded. However, the welding process requires finished spot welding equipment, and the production workshop needs to match the large-capacity transformer required by the spot welding equipment (generally not less than 350KVA). Not only is the production cost high, but the assembly is complicated and the production cycle is long. In addition, the finished product cannot be assembled at the construction site. In order to save transportation time, if a factory area is rented around the construction site, it is also necessary to consider whether the factory area has a transformer with the capacity required by the finished spot welding equipment, and it is difficult to rent the factory area. Utility Model Content

[0003] In view of the above problems, an embodiment of the present application is proposed. One purpose of the embodiment of the present application is to propose a connector with reliable connection strength, no need for equipment assistance, easy manual assembly, and high assembly efficiency.

[0004] To achieve this purpose, the present application embodiment adopts the following technical solutions:

[0005] A buckle-type connector, comprising an upper body and a lower body, wherein the upper body is used to install a steel bar truss, and the lower body is used to install a bottom formwork;

[0006] A mounting groove is provided in the center of the upper body, and groove walls on both sides of the mounting groove are first guide surfaces inclined from the groove opening of the mounting groove toward the inside of the mounting groove;

[0007] One side of the installation groove is recessed toward the groove wall to form a buckle groove with a transverse opening, and the groove top wall of the buckle groove is a second guide surface inclined from the installation groove to the buckle groove;

[0008] The groove bottom wall on the other side of the installation groove is provided with an elastic clamping wall extending away from the lower body, and the elastic clamping wall and the groove wall on the other side of the installation groove form a vertically opened crimping groove;

[0009] The two lower chord steel bars of the steel bar truss are respectively accommodated in the buckle groove or the crimping groove on the corresponding side.

[0010] Preferably, the elastic card wall comprises:

[0011] A supporting wall is disposed on the bottom wall of the mounting groove; and

[0012] A clamping wall, one end of which is connected to the end of the supporting wall away from the bottom wall of the mounting groove, and the other end is located in the crimping groove, an acute angle is formed between the supporting wall and the clamping wall, and the clamping wall can be elastically rotated relative to the supporting wall;

[0013] The side wall of the clamping wall located in the crimping groove is a third guide surface inclined from the notch of the crimping groove toward the inside of the crimping groove.

[0014] Preferably, the bottom wall of the crimping groove is an arc bottom wall matching the lower chord steel bar, and the end of the clamping wall located in the crimping groove is an arc surface that is cocircular with the bottom wall of the crimping groove, and the arc surface abuts against the lower chord steel bar.

[0015] Preferably, the distance between the top end of the circular arc bottom wall and the bottom end of the circular arc bottom wall is greater than the radius of the circular arc bottom wall and smaller than the diameter of the circular arc bottom wall;

[0016] The distance between the top end of the arc bottom wall and the arc surface is smaller than the diameter of the arc bottom wall.

[0017] Preferably, the side groove wall of the buckle groove is a circular arc groove wall matching the lower chord steel bar, and the center of the circular arc groove wall and the center of the circular arc bottom wall are located on the same horizontal line.

[0018] Preferably, the distance between the center of the circular arc groove wall and the center of the circular arc bottom wall is smaller than the distance between the centers of the two lower chord steel bars of the steel bar truss.

[0019] Preferably, the top wall of the buckling groove is tangent to the arc groove wall.

[0020] Preferably, a first reinforcing rib connected to the bottom wall of the mounting groove is provided on a side of the elastic clamping wall away from the crimping groove.

[0021] Preferably, a plurality of weight-reducing holes are provided at intervals on the bottom wall of the mounting groove between the elastic clamping wall and the crimping groove.

[0022] Preferably, the lower body comprises:

[0023] A connecting platform extending along the bottom wall of the upper body in a direction away from the upper body, the connecting platforms are provided on both sides of the bottom wall of the upper body, and a mounting hole is provided in the center of the connecting platform;

[0024] A plurality of second reinforcing ribs are evenly distributed in the circumferential direction of the connecting platform, and the side of the second reinforcing rib away from the connecting platform is flush with the side of the upper body.

[0025] Preferably, the mounting groove is located between the axes of the two mounting holes.

[0026] Preferably, the lower body further comprises:

[0027] Support plates, along the width direction of the upper body, are provided on both sides of the connecting platform, and the outer side surfaces of the support plates are flush with the outer side surfaces of the upper body;

[0028] The second reinforcing rib located between the support plate and the connecting platform is connected to the support plate at a side away from the connecting platform.

[0029] Preferably, the lower body comprises:

[0030] Enclosing walls, both sides of the bottom wall of the upper body are surrounded by the enclosing walls to form a cement installation groove, and the outer side surface of the enclosing wall is flush with the side surface of the upper body on the corresponding side;

[0031] A connecting platform is provided on the bottom of the cement installation groove, and a mounting hole is provided in the center of the connecting platform; and

[0032] A cement pad is arranged in the cement installation groove, and a mounting through hole coaxial with the mounting hole is arranged in the center of the cement pad.

[0033] Another object of the embodiments of the present application is to provide a steel truss floor deck that has reliable connection strength, is easy to assemble, and can be assembled without auxiliary equipment.

[0034] To achieve this purpose, the present application embodiment adopts the following technical solutions:

[0035] A steel bar truss floor deck, comprising:

[0036] A steel truss, a bottom plate, and a buckle-type connector located between the steel truss and the bottom plate and connecting the steel truss and the bottom plate;

[0037] The snap-on connector is the snap-on connector mentioned above.

[0038] The technical solution provided by the embodiment of the present application is that a mounting groove is provided in the center of the upper body, one side of the mounting groove is recessed toward the groove wall to form a horizontally open buckle groove, and the other side of the mounting groove has an elastic clamping wall, and the elastic clamping wall and the groove wall on the other side of the mounting groove form a vertically open crimping groove. When the steel truss is installed on the buckle-type connector, the lower chord steel bar on one side can be first placed in the buckle groove through the mounting groove, and then downward pressure is applied to the lower chord steel bar on the other side. The lower chord steel bar transfers the pressure to the elastic clamping wall, causing the elastic clamping wall to deform elastically, thereby increasing the size of the crimping groove, allowing the lower chord steel bar to pass through, thereby completing the installation of the steel truss in the buckle-type connector. The installation of the steel truss and the buckle-type connector can be achieved without the help of other equipment, which is not only convenient for manual installation, but also has high installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 A structural schematic diagram of a buckle-type connector is provided for an embodiment of the present application;

[0041] Figure 2 for Figure 1 Three views of;

[0042] Figure 3 for Figure 1 A magnified view of the structure on both sides;

[0043] Figure 4 It is a structural schematic diagram when the lower chord steel bar is pressed into the pressing groove;

[0044] Figure 5 It is a structural schematic diagram when the lower chord steel bar is pressed into the pressing groove;

[0045] Figure 6 A schematic diagram of the structure of another type of crimping connector when the lower chord steel bar is pressed into the crimping groove;

[0046] Figure 7 A structural schematic diagram of another buckle-type connector is provided for an embodiment of the present application;

[0047] Figure 8 for Figure 7 A front view of

[0048] Fig. 9 for Figure 7 Three views of;

[0049] Fig.10 A schematic structural diagram of a steel truss floor deck provided in one embodiment of the present application.

[0050] In the figure:

[0051] 1. Steel bar truss; 11. Upper chord steel bar; 12. Lower chord steel bar; 13. Web bar steel bar;

[0052] 2. Snap-on connector; 21. Upper body; 211. Mounting groove; 2111. First guide surface; 212. Snap-on groove; 2121. Circular arc groove wall; 2122. Second guide surface; 213. Elastic clamping wall; 2131. Support wall; 2132. Clamping wall; 21321. Third guide surface; 214. Press-on groove; 2141. Circular arc bottom wall; 215. Weight-reducing hole; 216. First reinforcing rib; 22. Lower body; 221. Connecting platform; 2211. Mounting hole; 222. Second reinforcing rib; 223. Support plate; 224. Cement mounting groove; 225. Enclosing wall;

[0053] 3. Bottom template. DETAILED DESCRIPTION

[0054] The inventor of the present application has conducted a detailed study on the connectors used to connect the steel truss to the bottom template, from the structural composition to the assembly of the steel truss floor deck. Although the strength of the metal connector is relatively high, the use of welding to connect the steel truss to the metal connector requires welding equipment and a transformer matched with the welding equipment, which makes the assembly operation of the steel truss floor deck difficult, the assembly cost is high, and the location of the finished product assembly is limited. In addition, in order to prevent the metal connector from leaking out after the bottom template is disassembled and to avoid the metal connector from being corroded, it is also necessary to inject plastic parts at the connection between the metal connector and the bottom template, which makes the manufacturing process of the metal connector cumbersome. Although the plastic connector has good corrosion resistance and does not need to be compounded with other materials, the structure of the existing plastic connector is that two horizontally opened clamping grooves are provided on the top of the connector facing each other. It is necessary to reduce the distance between the two lower chord steel bars of the steel truss so that the bottom of the steel truss passes through the installation groove at the top of the connector so that the two lower chord steel bars are accommodated in the clamping groove on the corresponding side. This method still requires the help of equipment, and human power is almost unable to compress the two lower chord steel bars of the steel truss and make them elastically deform. Therefore, the plastic connectors of the above structure still have the problems of difficult assembly operation of the steel truss floor deck, high assembly cost, and limited assembly location.

[0055] Based on this, the inventor tried to optimize the structure of the plastic connector, changing one of the horizontally opened snap-in grooves for accommodating the lower chord steel bar to a vertically opened crimping groove, and the other horizontally opened snap-in groove is a buckle groove. When connecting the steel truss, one of the lower chord steel bars can be placed in the buckle groove first, and pressure is applied to the other lower chord steel bar, so that the lower chord steel bar squeezes the groove wall of the crimping groove, forcing the groove wall on one side of the crimping groove to undergo elastic deformation, and the opening of the crimping groove is increased to allow the lower chord steel bar to pass through and snap into the crimping groove. Although this method allows workers to connect the steel truss with the buckle-type connector without the help of external equipment, during installation, the lower chord steel bar needs to be aligned with the opening of the crimping groove before applying downward pressure F to the lower chord steel bar, so as to ensure that the groove wall of the crimping groove will not be fatigued and fractured as much as possible. This requires that the lower chord steel bar installed in the buckle groove can be accurately installed in place, so as to ensure that the other lower chord steel bar can be aligned with the notch of the crimping groove. In addition, the groove wall of the crimping groove needs to have a structure to guide the lower chord steel bar to enter, so that the force applied by the lower chord steel bar to the groove wall of the crimping groove is the force to open the groove opening. It is understandable that if the lower chord steel bar is not aligned with the groove opening of the crimping groove, the downward pressure F applied to the lower chord steel bar at this time will not necessarily act accurately on the two groove walls of the crimping groove, but may act on the top of the groove wall of the crimping groove, causing the groove wall of the crimping groove to roll inwardly. At this time, the groove wall of the crimping groove will cover the groove opening of the crimping groove, which will not only damage the buckle-type connector, but also cause installation failure.

[0056] In view of this, the inventors increased the strength of the crimping groove wall without affecting the elastic deformation, and set a direction to guide the lower chord steel bars into the crimping groove structure, and are committed to developing a crimping connector that is easy for workers to install with high precision and has a high installation success rate, thereby obtaining the following embodiments of the present application.

[0057] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only the parts related to the present application, rather than all structures, are shown in the accompanying drawings.

[0058] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0061] Embodiment 1:

[0062] like Figure 1 to Figure 3As shown, this embodiment provides a buckle-type connector 2, which includes an upper body 21 and a lower body 22, wherein the upper body 21 is used to install the steel bar truss 1, and the lower body 22 is used to install the bottom template 3, so as to realize the connection between the bottom template 3 and the steel bar truss 1. Among them, a mounting groove 211 is provided in the center of the upper body 21, and the groove walls on both sides of the mounting groove 211 are first guide surfaces 2111 inclined from the groove opening of the mounting groove 211 to the inside of the mounting groove 211, and one side of the mounting groove 211 is recessed toward the groove wall to form a horizontally opened buckle groove 212, and the groove top wall of the buckle groove 212 is a second guide surface 2122 inclined from the mounting groove 211 to the buckle groove 212. The lower chord steel bar 12 installed in the buckling groove 212 is convenient to enter the installation groove 211 under the guidance of the first guide surface 2111, and enters the buckling groove 212 under the guidance of the second guide surface 2122, and abuts against the groove side wall of the buckling groove 212, so as to ensure the accurate installation of the lower chord steel bar 12 in the buckling groove 212. The groove bottom wall on the other side of the installation groove 211 has an elastic clamping wall 213 extending away from the lower body 22, and the elastic clamping wall 213 and the groove wall on the other side of the installation groove 211 form a vertically opened crimping groove 214. Under the action of the first guide surface 2111, the notch of the crimping groove 214 is in an open state. Even if the lower chord steel bar 12 installed in the buckling groove 212 is not accurately abutted against the groove side wall of the buckling groove 212 and there is a certain error, the notch of the crimping groove 214 in the open state can accommodate the above error. At this time, the lower chord steel bar 12 abuts against the first guide surface 2111 and can move along the first guide surface 2111, thereby facilitating the lower chord steel bar 12 to enter the crimping groove 214, thereby ensuring the probability of successful installation and reducing the probability of damaging the buckled connector 2 during installation.

[0063] Please refer to Figure 4When the lower chord steel bar 12 enters the crimping groove 214, it will abut against the first guide surface 2111 and the elastic clamping wall 213, and the pressure F applied to the lower chord steel bar 12 will be transmitted to the first guide surface 2111 and the elastic clamping wall 213 by the lower chord steel bar 12. At this time, since the first guide surface 2111 is an inclined surface, the direction of the force Q applied by the lower chord steel bar 12 to the first guide surface 2111 is perpendicular to the first guide surface 2111, so Q will be decomposed into a downward pressure Q1 and a thrust Q2 that pushes the first guide surface 2111 to move away from the crimping groove 214. If the elastic clamping wall 213 is vertical, there is no force point between the lower chord steel bar 12 and the elastic clamping wall 213, so they can only abut and cannot transmit force to the elastic clamping wall 213. Therefore, the elastic clamping wall 213 cannot be elastically deformed, and only the side wall of the installation groove 211 can be elastically deformed. However, if the side wall strength of the installation groove 211 is relatively weak and can be deformed under the action of the thrust Q2, then when the lower chord steel bar 12 is accommodated in the crimping groove 214, the side wall of the crimping groove 214 (the side wall of the installation groove 211) cannot play a good limiting role for the lower chord steel bar 12, and it is very likely that the lower chord steel bar 12 will deform under the outward force exerted by the side wall of the crimping groove 214 by the lower chord steel bar 12. Therefore, the two side walls of the installation groove 211 need to have a certain thickness to ensure good limiting of the lower chord steel bar 12.

[0064] Then, after the steel bar truss 1 is installed on the upper body 21, the two lower chord steel bars 12 will give outward pressure to the two side walls of the installation slot 211 (described in detail below). Therefore, in order to ensure the good limiting effect of the side walls of the crimping slot 214 (the side walls of the installation slot 211), the thickness of the two side walls of the installation slot 211 is relatively thick, so the force driving the elastic deformation of the wall of the installation slot 211 becomes larger, which is difficult to achieve by manpower. Then, in this case, only the elastic card wall 213 can be elastically deformed to allow the lower chord steel bar 12 to pass through, so in some embodiments of the present application, please refer to Figure 5 , one possible structure of the elastic clamping wall 213 is that the clamping wall 2132 is set on the bottom wall and is inclined from the crimping groove 214 toward the installation groove 211. When the lower chord steel bar 12 enters the crimping groove 214, a force R perpendicular to the elastic clamping wall 213 is applied to the elastic clamping wall 213, and R is decomposed into a downward pressure R1 and a thrust R2 that pushes the elastic clamping wall 213 to move away from the crimping groove 214. Under the action of the thrust R2, the elastic clamping wall 213 is elastically deformed so that the lower chord steel bar 12 enters the crimping groove 214. However, since the force applied to the lower chord steel bar 12 during the manual installation operation is not fixed, if the pressure applied to the lower chord steel bar 12 is too large, it may exceed the elastic deformation range of the elastic clamping wall 213 when it is transmitted to the elastic clamping wall 213, causing the elastic clamping wall 213 to be permanently deformed or damaged. Risk.

[0065] Based on this, in the embodiments of this application, please refer to Figure 1 to Figure 3 Another structure that can be realized of the elastic card wall 213 is that the elastic card wall 213 includes a supporting wall 2131 and a clamping wall 2132, wherein the supporting arm is vertically arranged on the bottom wall of the mounting groove 211, one end of the clamping wall 2132 is connected to the end of the supporting wall 2131 away from the bottom wall of the mounting groove 211, and the other end is located in the crimping groove 214, and there is an acute angle between the supporting wall 2131 and the clamping wall 2132, the clamping wall 2132 can be elastically rotated relative to the supporting wall 2131, and the side wall of the clamping wall 2132 located in the crimping groove 214 is a third guide surface 21321 inclined from the notch of the crimping groove 214 to the inside of the crimping groove 214. When the lower-chord steel bar 12 enters the crimping groove 214, the lower-chord steel bar 12 abuts against the third guide surface 21321, which applies a thrust to the third guide surface 21321 to move in the direction away from the crimping groove 214. At this time, the clamping wall 2132 will produce elastic deformation at the end connected to the support wall 2131, so that the clamping wall 2132 elastically rotates in the direction of the support wall 2131, thereby expanding the notch of the crimping groove 214 to facilitate the entry of the lower-chord steel bar 12, and after the lower-chord steel bar 12 enters the crimping groove 214, the clamping wall 2132 returns to its original state. At this time, the end of the clamping wall 2132 located in the crimping groove 214 abuts against the lower-chord steel bar 12 to limit the position of the lower-chord steel bar 12. When the lower chord steel bar 12 enters the crimping groove 214, it is the clamping wall 2132 that is deformed, not the supporting wall 2131, so the connection between the supporting wall 2131 and the bottom wall will not break, which can ensure the stability of the connection between the entire elastic clamping wall 213 and the bottom wall. In addition, assuming that the thrust applied by the lower chord steel bar 12 to the clamping wall 2132 is relatively large, since there is an acute angle between the clamping wall 2132 and the supporting wall 2131, the angle of rotation of the rotating wall can only be the above-mentioned acute angle, and it will fit with the supporting wall 2131. At this time, the size of the notch of the crimping groove 214 is larger than the diameter of the lower chord steel bar 12, so that in actual operation, the clamping wall 2132 will not rotate to fit with the supporting wall 2131, thereby ensuring that the end of the clamping wall 2132 connected to the supporting wall 2131 will not be permanently deformed.

[0066] For further information, please refer to Figure 1 to Figure 3 The thickness of the clamping wall 2132 is smaller than the thickness of the supporting wall 2131. Therefore, the force exerted on the clamping wall 2132 to rotate relative to the supporting wall 2131 is smaller than the force required for the supporting wall 2131 to rotate relative to the bottom wall of the installation groove 211, thereby reducing the force applied by workers to the lower chord steel bars 12 and further facilitating manual assembly.

[0067] Of course, it is also possible that the workers may apply a relatively large pressure to the steel truss 1 during assembly, resulting in the risk of deformation of the support wall 2131 relative to the bottom wall of the installation groove 211. In some embodiments of the present application, please refer to Figure 7 A first reinforcing rib 216 connected to the bottom wall of the mounting groove 211 is provided on the side of the elastic card wall 213 away from the crimping groove 214. The first reinforcing rib 216 is a triangular rib with better stability. The length of the side where the first reinforcing rib 216 is connected to the elastic card wall 213 is the same as the height of the support wall 2131, thereby further increasing the strength of the support.

[0068] Since the top wall of the buckle groove 212 is a cantilever structure, the cantilever has a certain thickness to ensure sufficient cantilever bearing capacity to resist the upward tension of the lower chord steel bar 12. It can be understood that when pouring concrete on the floor deck, its construction load (including the dead weight of wet concrete) acts on the bottom formwork 3, and then the construction load is transferred to the steel truss 1 through the connector 2, and the steel truss 1 then transfers the construction load to the supports (beams, shear walls, etc.) at both ends, so the steel truss 1 will apply an upward tension to the bottom formwork 3, and the tension is transferred to the steel truss 1 through the buckle connector 2, so that the steel truss 1 will apply an upward tension to the top wall of the buckle groove 212.

[0069] Please refer to Figure 6 In order to ensure that the buckle-type connector 2 and the steel truss 1 will not shift relative to each other after being connected, the horizontal distance between the center lines of the two lower chord steel bars 12 of the steel truss 1 is W2, and the horizontal distance between the center lines of the crimping groove 214 and the buckling groove 212 is W1, 3mm≤W2-W1≤7mm, so that when the two lower chord steel bars 12 of the steel truss 1 are accommodated in the crimping groove 214 or the buckling groove 212 on the corresponding side, the steel truss 1 is in a slight elastic compression state, so that the two lower chord steel bars 12 of the steel truss 1 have a tendency to move in the opposite direction, and form two outward thrusts N of the same size and opposite directions, and an upward pressure P, but for each buckle-type connector 2, the two thrusts of the same size and opposite directions acting on it at the same time can offset each other. In fact, the snap-on connector 2 provided in the embodiment of the present application has a self-balancing effect. The snap-on connector 2 balances the two outward thrusts of the two lower chord steel bars 12 of the steel truss 1. Therefore, the two thrusts will not be transmitted to the bottom template 3 through the snap-on connector 2, avoiding the bottom template 3 from being stretched and deformed to affect the supporting effect. In addition, it can also avoid the phenomenon that the fasteners connecting the bottom template 3 with the snap-on connector 2 will cause difficulties in subsequent disassembly due to the shear force. The upward pressure P will offset the downward tightening force given to the snap-on connector 2 by the fasteners. In addition, when the lower chord steel bars 12 apply a force to the groove walls on both sides of the installation groove 211, the friction between the steel truss 1 and the connector can be increased to ensure that the steel truss 1 and the connector will not shift after installation.

[0070] In order to maximize the friction between the steel truss 1 and the connecting member, so as to increase the position stability between the steel truss 1 and the connecting member, in some embodiments of the present application, please refer to Figure 1 to Figure 3 , the bottom wall of the crimping groove 214 is an arc bottom wall 2141 that matches the lower chord steel bar 12, and the end of the clamping wall 2132 located in the crimping groove 214 is an arc surface that is cocircular with the bottom wall of the crimping groove 214, and the arc surface abuts against the lower chord steel bar 12. When the lower-turned steel bar is in the crimping groove 214, the lower chord steel bar 12 can maintain an abutting state with the arc bottom wall 2141 and the arc surface, so that the contact area between the lower-turned steel bar and the groove wall of the crimping groove 214 is maximized. Similarly, the side groove wall of the buckle groove 212 is an arc groove wall 2121 that matches the lower chord steel bar 12. In order to ensure that after the steel bar truss 1 is connected to the buckle-type connector 2, the two lower chord steel bars 12 of the steel bar truss 1 are on the same horizontal line to avoid the steel bar truss 1 from being skewed, the center of the arc groove wall 2121 and the center of the arc bottom wall 2141 are on the same horizontal line.

[0071] In order to increase the position of the lower chord steel bar 12 by the groove wall of the crimping groove 214 when the lower chord steel bar 12 is located in the crimping groove 214, in some embodiments of the present application, please refer to Figure 1 to Figure 3 The distance between the top end of the arc bottom wall 2141 and the bottom end of the arc bottom wall 2141 is greater than the radius of the arc bottom wall 2141 and smaller than the diameter of the arc bottom wall 2141, so that the distance between the top end of the arc bottom wall 2141 and the arc surface on the clamping wall 2132 is smaller than the diameter of the arc bottom wall 2141. The top end of the arc bottom wall 2141 can also limit the position of the lower chord steel bar 12, so that the lower chord steel bar 12 will not fall out of the crimping groove 214.

[0072] Further, in order to ensure aesthetics, in some embodiments of the present application, please refer to Figure 1 to Figure 3 The angle of the first guide surface 2111 located in the crimping groove 214 relative to the vertical plane is the same as the angle of the third guide surface 21321 relative to the vertical plane. At this time, the first guide surface 2111 and the third guide surface 21321 are symmetrical relative to the vertical plane passing through the axis of the lower chord steel bar 12.

[0073] In some embodiments of this application, please refer to Figure 1-2 A plurality of weight-reducing holes 215 are provided on the bottom wall of the mounting groove 211 between the elastic card wall 213 and the crimping groove 214. This can not only reduce the material of the buckle-type connector 2 and save costs, but also reduce the weight of the buckle-type connector 2 and facilitate transportation.

[0074] In some embodiments of the present application, a possible structure of the lower body 22 is as follows: Figure 1 to Figure 3The lower body 22 includes a connecting platform 221 and a second reinforcing rib 222, wherein the connecting platform 221 extends along the bottom wall of the upper body 21 in a direction away from the upper body 21, and connecting platforms 221 are provided on both sides of the bottom wall of the upper body 21, and a mounting hole 2211 is provided in the center of the connecting platform 221. The fastener passes through the bottom template 3 and is screwed into the mounting hole 2211. Compared with the case without the mounting hole 2211, the installation torque of the fastener can be reduced, which is convenient for the installation of the fastener. The connecting platform 221 is evenly distributed with a plurality of second reinforcing ribs 222 in the circumference, which can not only ensure the strength of the connecting platform 221, but also save materials and have a smaller weight compared with the structure in which the circumference of the connecting platform 221 is flush with the circumference of the upper body 21. Furthermore, the side of the second reinforcing rib 222 away from the connecting platform 221 is flush with the side of the upper body 21, making the buckle-type connector 2 more beautiful as a whole.

[0075] Furthermore, the wall thickness of the connecting platform 221 is greater than or equal to 3 mm, so as to ensure that the fastener is screwed into the mounting hole 2211 to form a certain pulling force, thereby ensuring the strength of the connection between the downward pressing connector and the bottom template 3.

[0076] Please refer to Figure 1 to Figure 3 There may be multiple second reinforcing ribs 222, and the multiple second reinforcing ribs 222 may be arranged in a "cross" shape or a "M" shape with the connecting platform 221 as the center, as long as the connecting platform 221 can be stably supported, and this application does not make any specific limitation on this.

[0077] Further, in order to strengthen the supporting force of the second reinforcing rib 222 on the connecting platform 221, in some embodiments of the present application, please refer to Figure 1 to Figure 3 The lower body 22 also includes a support plate 223. Along the width direction of the upper body 21, support plates 223 are provided on both sides of the connecting platform 221. The outer side of the support plate 223 is flush with the outer side of the upper body 21. The second reinforcing rib 222 located between the support plate 223 and the connecting platform 221 is connected to the support plate 223 at the side away from the connecting platform 221. That is to say, at this time, one end of the second reinforcing rib 222 is connected to the connecting platform 221, and the other end is connected to the support plate 223. Compared with the structure with only the second reinforcing rib 222, the supporting strength of the connecting platform 221 is higher, and the side of the buckle-type connector 2 is also made as a whole. The support plate 223 can cover the second reinforcing rib 222, so that it is more beautiful.

[0078] When the bottom template 3 can be removed from the connecting piece, the poured floor slab needs to be puttyed to achieve surface leveling. However, after the bottom template 3 is removed, the bottom surface where the connecting piece and the bottom template 3 are in contact will be exposed. Since the snap-on connecting piece 2 is made of plastic, the plastic material is not conducive to the adsorption of putty. Therefore, during the process of brushing putty on the floor slab, the putty at the connecting piece is at risk of falling off. If the putty at the connecting piece falls off, it will affect the leveling effect of the bottom of the floor slab.

[0079] To solve the above problems, please refer to Figure 7 to Figure 9 In some embodiments of the present application, another possible implementation of the lower body 22 is that the lower body 22 includes an enclosure wall 225, a connection platform 221 and a cement pad. The two sides of the bottom of the upper body 21 are surrounded by enclosure walls 225 to form a cement installation groove 224. The outer side of the enclosure wall 225 is flush with the side of the upper body 21 on the corresponding side, making the appearance of the connector more beautiful. The bottom wall of the cement installation groove 224211 is provided with a connection platform 221, and the center of the connection platform 221 has a mounting hole 2211. The cement pad is arranged in the cement installation groove 224211. The center of the cement pad is provided with a mounting hole coaxial with the mounting hole 2211. The fastener passes through the bottom template 3 and the mounting hole and can be screwed into the mounting hole 2211 to realize the detachable connection between the bottom template 3 and the buckle type connector 2. The cement pad can be directly injected into the mold connected to the cement installation groove 224211 by injecting concrete, and the mold can be removed after the concrete solidifies. The operation is simple and the cost is low. When the concrete poured on the floor deck of the steel truss 1 solidifies to the designed strength and the bottom formwork 3 is removed, the side of the cement pad that is in contact with the bottom formwork 3 is exposed. Since the material is concrete, which is the same as the material of the floor, it not only has a good ability to absorb putty, but also makes the putty scraped on the floor have a uniform adsorption force on the entire floor, and there will be no local putty falling. In addition, since the cement pad can wrap the connecting platform 221, the cement pad can be bonded to the connecting platform 221 after drying, ensuring that the cement pad will not fall off from the cement installation groove 224211.

[0080] It is understandable that in order to ensure that the cement pad is in contact with the bottom template 3, please refer to Figure 7 to Figure 9 , the cement pads of the embodiment of the present application protrude from the enclosure wall 225. Since there are cement pads or connecting platforms 221 on both sides of the lower body 22, when the bottom formwork 3 is connected with the buckle-type connector 2, the center of the lower body 22 is empty. After pouring concrete on the steel truss 1 floor deck, the concrete can flow through the center of the lower body 22, thereby ensuring that the buckle-type connector 2 is well wrapped by the concrete, avoiding leakage from other places except the surface that fits the bottom formwork 3 after the bottom formwork 3 is removed, and avoiding floor quality problems. The protruding part can be between 2mm and 4mm.

[0081] Furthermore, in some embodiments of the present application, a structure of the cement pad can be realized as follows: the area of ​​the fitting surface between the cement pad and the bottom formwork 3 is larger than the area of ​​the cement pad in the cement mounting groove 224211. In this case, the cement pad is trapezoidal, which can not only ensure the aesthetics while allowing the bottom formwork 3 to apply stable supporting strength to the snap-on connector 2, but also when the concrete completely wraps the cement pad, it can reflect that the snap-on connector 2 has been wrapped by the concrete, and the snap-on connector 2 will not leak out, thereby preventing the snap-on connector 2 from being corroded by the outside.

[0082] In some embodiments of this application, please refer to Figure 7 to Figure 9 The height of the connecting platform 221 is greater than the height of the enclosing wall 225, so that the connecting platform 221 protrudes from the cement installation groove 224211, thereby providing better skeleton support for the cement pad during pouring and solidification. In addition, the distance between the connecting platform 221 and the bottom template 3 is closer, which is more conducive to the connection strength between the bottom template 3 and the connecting piece.

[0083] In some embodiments of this application, please refer to Figures 1 to 9 The mounting groove 211 is located between the axes of the two mounting holes 2211. When the bottom template 3 and the snap-on connector 2 are connected together using fasteners, since the fasteners are located on the two side groove walls of the mounting groove 211, the two side groove walls of the mounting groove 211 not only have a certain thickness but also have a relatively high height. Therefore, the length of the mounting hole 2211 can be greater than the height of the connecting platform 221, so that the fasteners can pass through the connecting platform 221 and be screwed on the side groove walls of the mounting groove 211, thereby increasing the connection strength between the bottom template 3 and the snap-on connector 2.

[0084] Embodiment 2:

[0085] Please refer to Fig.10The present embodiment provides a steel bar truss 1 floor deck, which includes a steel bar truss 1, a bottom template 3, and a buckle-type connector 2 as provided in the first embodiment. The two lower chord steel bars 12 of the steel bar truss 1 are respectively clamped in the buckle groove 212 or the crimping groove 214 on the corresponding side, and the bottom template 3 is connected to the buckle-type connector 2 through a fastener. When the steel bar truss 1 is installed on the buckle-type connector 2, the lower chord steel bar 12 on one side is first installed in the buckle groove 212 under the guidance of the first guide surface 2111 and the second guide surface 2122. At this time, the lower chord steel bar 12 on the other side is located at the notch of the crimping groove 214. The operator applies downward pressure to the steel bar truss 1, and the lower chord steel bar 12 on the other side slides into the crimping groove 214 along the first guide surface 2111. In this process, no external equipment is required, and manual assembly can be achieved. Not only is the assembly easy, the production cycle is short, and the finished product can also be assembled on the construction site, saving transportation time and shortening the project cycle. In addition, if you rent a factory near the construction site, you do not need to consider whether the factory has the transformers required for the finished spot welding equipment, so renting a factory is easy.

[0086] Please refer to Fig.10 The steel truss 1 floor deck includes a plurality of steel trusses 1 evenly spaced apart on the bottom formwork 3. The steel trusses 1 also include: upper chord steel bars 11 and web bars 13. The lower chord steel bars 12 are located below the upper chord steel bars 11 and have lower chord steel bars 12 on both sides. The two ends of the web bars 13 are respectively connected to the upper chord steel bars 11 and the lower chord steel bars 12. According to different needs, steel trusses 1 of different specifications can be selected. The specifications of the upper chord steel bars 11, lower chord steel bars 12 and web bars 13 of steel trusses 1 of different specifications may also be different. For example, the diameter of the lower chord steel bar 12 can be selected according to different needs. Different sizes within the range of 6-14 mm. The crimping groove 214 and the buckling groove 212 of the buckle-type connector 2 need to match the model of the lower chord steel bar 12. The types of upper chord steel bars 11, lower chord steel bars 12 and web steel bars 13 of steel bar trusses 1 of different specifications may also be different, and the types of upper chord steel bars 11, lower chord steel bars 12 and web steel bars 13 of the same steel bar truss 1 may also be different. For example, the steel bars may be plain round steel bars, ribbed steel bars, etc.

[0087] Please refer to Fig.10 Each steel bar truss 1 corresponds to a plurality of buckle-type connectors 2, and the plurality of buckle-type connectors 2 are evenly spaced along the axial direction of the lower chord steel bar 12. Thus, the bottom formwork 3 can provide uniform and strong support for the poured concrete.

[0088] Further, in some embodiments of the present application, Fig.10As shown, the steel bar truss 1 floor deck also includes a fastener, which can pass through the bottom template 3 and be screwed into the mounting hole 2211 to connect the bottom template 3 with the buckled connector 2. The fastener can be a screw, a bolt, etc., as long as it can connect the bottom template 3 with the connector and can be removed from the bottom template 3, and this embodiment does not make specific limitations.

[0089] The material of the bottom template 3 of the embodiment of the present application can include but is not limited to galvanized sheet, galvanized alloy sheet, patterned steel sheet, bamboo plywood, wooden template, wood-plastic board, injection molding board, aluminum alloy template, corrugated steel sheet, fiber cement board, cement pressure board. Among the above-mentioned many materials of the bottom template 3, the thickness of the metal material is 1mm-2mm, and the thickness of the non-metal material is 15mm-25mm to ensure the strength of the support.

[0090] The following is an introduction to the production and use process of the steel truss 1 floor deck provided in the embodiment of the present application:

[0091] S10, using steel bars to build a framework, and forming a steel bar truss 1 by welding.

[0092] S20, forming the bottom mold, automatically drilling holes using mechanical equipment, and connecting the buckle-type connector 2 to the bottom mold after drilling through fasteners.

[0093] S30, placing the lower chord steel bars 12 on one side into the buckle groove 212, and then applying downward pressure to the steel truss 1 to press the lower chord steel bars 12 on the other side into the pressing groove 214, and the detachable bottom mode steel truss 1 floor deck is completed.

[0094] S40, laying the detachable bottom model steel truss 1 floor deck in the designated area, and pouring concrete. After pouring, the steel truss 1 provides support rigidity for the bottom form, and the threaded connection between the fasteners and the buckled connector 2 bears the concrete deadweight and construction load.

[0095] S50, after the concrete solidifies to the required level, the fasteners on the bottom formwork 3 are dismantled and the bottom formwork 3 is removed.

[0096] If the steel bar truss 1st floor deck is not removable, then the above steps do not need to be performed in S50.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A buckle type connector, characterized in that: It comprises an upper body and a lower body, wherein the upper body is used to install the steel bar truss, and the lower body is used to install the bottom formwork; A mounting groove is provided in the center of the upper body, and groove walls on both sides of the mounting groove are first guide surfaces inclined from the groove opening of the mounting groove toward the inside of the mounting groove; One side of the installation groove is recessed toward the groove wall to form a buckle groove with a transverse opening, and the groove top wall of the buckle groove is a second guide surface inclined from the installation groove to the buckle groove; The groove bottom wall on the other side of the installation groove is provided with an elastic clamping wall extending away from the lower body, and the elastic clamping wall and the groove wall on the other side of the installation groove form a vertically opened crimping groove; The two lower chord steel bars of the steel bar truss are respectively accommodated in the buckle groove or the crimping groove on the corresponding side.

2. The press-fit connector according to claim 1, characterized in that: The elastic card wall comprises: A supporting wall is disposed on the bottom wall of the mounting groove; and A clamping wall, one end of which is connected to the end of the supporting wall away from the bottom wall of the mounting groove, and the other end is located in the crimping groove, an acute angle is formed between the supporting wall and the clamping wall, and the clamping wall can be elastically rotated relative to the supporting wall; The side wall of the clamping wall located in the crimping groove is a third guide surface inclined from the notch of the crimping groove toward the inside of the crimping groove.

3. The press-fit connector according to claim 2, characterized in that: The bottom wall of the crimping groove is an arc bottom wall matching the lower chord steel bar, the end of the clamping wall located in the crimping groove is an arc surface that is cocircular with the bottom wall of the crimping groove, and the arc surface abuts against the lower chord steel bar.

4. The press-fit connector according to claim 3, characterized in that: The distance between the top end of the circular arc bottom wall and the bottom end of the circular arc bottom wall is greater than the radius of the circular arc bottom wall and smaller than the diameter of the circular arc bottom wall; The distance between the top end of the arc bottom wall and the arc surface is smaller than the diameter of the arc bottom wall.

5. The press-fit connector according to claim 3, characterized in that: The side groove wall of the buckle groove is a circular arc groove wall matching the lower chord steel bar, and the center of the circular arc groove wall and the center of the circular arc bottom wall are located on the same horizontal line.

6. The press-fit connector according to claim 5, characterized in that: The distance between the center of the circular arc groove wall and the center of the circular arc bottom wall is smaller than the distance between the centers of the two lower chord steel bars of the steel bar truss.

7. The press-fit connector according to claim 5, characterized in that: The groove top wall of the buckling groove is tangent to the arc groove wall.

8. The press-fit connector according to claim 1, characterized in that: A first reinforcing rib connected to the bottom wall of the installation groove is provided on one side of the elastic clamping wall away from the crimping groove.

9. The press-fit connector according to claim 1, characterized in that: A plurality of weight-reducing holes are arranged at intervals on the bottom wall of the mounting groove between the elastic clamping wall and the crimping groove.

10. The press-fit connector according to any one of claims 1 to 9, characterized in that: The lower body comprises: A connecting platform extending along the bottom wall of the upper body in a direction away from the upper body, the connecting platforms are provided on both sides of the bottom wall of the upper body, and a mounting hole is provided in the center of the connecting platform; A plurality of second reinforcing ribs are evenly distributed in the circumferential direction of the connecting platform, and the side of the second reinforcing rib away from the connecting platform is flush with the side of the upper body.

11. The press-fit connector according to claim 10, characterized in that: The mounting groove is located between the axes of the two mounting holes.

12. The press-fit connector according to claim 10, characterized in that: The lower body also includes: Support plates, along the width direction of the upper body, are provided on both sides of the connecting platform, and the outer side surfaces of the support plates are flush with the outer side surfaces of the upper body; The second reinforcing rib located between the support plate and the connecting platform is connected to the support plate at a side away from the connecting platform.

13. The press-fit connector according to any one of claims 1 to 9, characterized in that: The lower body comprises: Enclosing walls, both sides of the bottom wall of the upper body are surrounded by the enclosing walls to form a cement installation groove, and the outer side surface of the enclosing wall is flush with the side surface of the upper body on the corresponding side; A connecting platform is provided on the bottom of the cement installation groove, and a mounting hole is provided in the center of the connecting platform; and A cement pad is arranged in the cement installation groove, and a mounting through hole coaxial with the mounting hole is arranged in the center of the cement pad.

14. A steel bar truss floor deck, characterized in that: include: A steel truss floor deck, a bottom plate, and a buckle-type connector located between the steel truss and the bottom plate and connecting the steel truss and the bottom plate; The snap-on connector is the snap-on connector according to any one of claims 1 to 13.

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