A steel bar mesh support device

Abstract

The present invention relates to a reinforcing mesh support device, which includes a bottom plate, a retaining member and a support member. A connection hole is eccentrically provided on the bottom plate. The lower end of the connection column of the retaining member extends into the connection hole, and the upper end is fixedly connected with a retaining tube. A through hole is provided in the lower part of the retaining tube, and a through hole is provided on the peripheral wall of the retaining tube above the through hole. The opening of the through hole faces the central axis of the bottom plate. The retaining tube is connected to the support member through the through hole. The support member includes a support body, a connecting plate and a slider. The central axis of the support body coincides with the central axis of the bottom plate. A connecting plate is connected to the peripheral wall of the support body. The other end of the connecting plate passes through the through hole and is connected to a slider that is located in the retaining tube and is in sliding contact with the inner wall of the retaining tube. The height of the slider is less than the height of the through hole. The present invention is a reinforcing mesh support device that minimizes waste as much as possible and ensures the design performance of the reinforcing mesh on the premise of meeting the support requirements of the reinforcing mesh.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering construction, and particularly relates to a steel bar mesh support device. Background Art

[0002] In construction engineering, for the construction and forming of cast-in-place reinforced concrete slabs, before pouring concrete, it is necessary to use supports (or called stools) to prop up the upper steel bar mesh in advance, so that it is suspended at a certain height and maintains the required distance from the lower steel bar mesh.

[0003] However, since most steel bar stools are simply fabricated and processed by steel bar workers on site, there are often problems such as poor processing quality, insufficient strength, and poor stability of the steel bar stools, resulting in poor effect of supporting and positioning the upper steel bars, problems of steel bar collapse and inaccurate positioning of the distance between the upper and lower steel bars. Moreover, the steel bar stools need to be buried in the concrete layer during construction, causing a large amount of waste. According to the Construction Project Quantity Bill Pricing Specification GB50500 - 2013, Article 19 on Page 52: The support steel bars and double-layer steel bars in fixed positions in cast-in-place components, and the "iron horses" for double-layer steel bars, the anchoring steel bars extending out of the components, the hooks of precast components, etc. are incorporated into the steel bar engineering quantity. However, there is no specific theoretical basis and data so far, no general calculation standard and specification, and it is often based on design experience and intuition, which is also likely to increase the construction calculation errors of both the construction party and the construction unit.

[0004] In order to save materials, many construction parties have started to use plastic stools and recyclable stools to achieve the preliminary support of the steel bar mesh, such as the appearance patent for the floor slab steel bar support stool with the application number CN201430139019.5, and the patent for a reusable construction steel bar stool with the publication number CN208792628U. However, the plastic stools have low strength and cannot bear the load brought by the walking and working of construction workers on the steel bar mesh before pouring. And the recyclable stools no longer support the steel bar mesh after recycling. After the concrete is poured, the upper steel bar mesh is prone to sink without support, the distance between the upper and lower steel bar meshes decreases, reducing the effective load design value of the concrete slab, and the concrete slab is prone to cracking, which will bring more serious safety hazards.

[0005] Therefore, on the premise of ensuring the essence of the support, minimizing waste as much as possible, ensuring the design performance of the steel bar mesh, and ensuring the construction quality are the fundamental design of the current steel bar mesh support device. Summary of the Invention

[0006] To solve the above problems, the present invention provides a steel bar mesh support device, aiming to provide a steel bar mesh support device that minimizes waste as much as possible and ensures the design performance of the steel bar mesh on the premise of meeting the support requirements of the steel bar mesh.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] A steel bar mesh support device, comprising a bottom plate, a holding member and a support member, wherein the bottom plate is detachably connected to the holding member, and the holding member is detachably connected to the support member;

[0009] A connecting hole is eccentrically provided on the bottom plate. The holding member includes a connecting column and a holding tube. The connecting column extends into the connecting hole and is in sliding contact with the connecting hole up and down. A holding tube is fixedly connected to the upper end of the connecting column. A through hole penetrating the inner and outer walls of the holding tube is provided at the lower part of the holding tube. The opening width of the through hole is the same as the inner diameter of the holding tube. A through hole is provided on the peripheral wall of the holding tube above the through hole. The through hole is vertically communicated with the through hole and the opening faces the central axis of the bottom plate. The opening width of the through hole is smaller than the inner diameter of the holding tube;

[0010] The support member includes a support body, a connecting plate and a slider. The support body is located above the bottom plate. The central axis of the support body is vertically aligned with the center of the bottom plate. A connecting plate is connected to the peripheral wall of the support body. The other end of the connecting plate passes through the through hole and is connected to the slider inside the holding tube. The slider is in sliding contact with the inner wall of the holding tube. The height of the slider is smaller than the height of the through hole.

[0011] The bottom plate, the connecting plate and the slider are all made of concrete. The holding member is made of steel. The support body is a concrete column.

[0012] The length of the holding tube is greater than the length of the support body.

[0013] A core rod is fixed at the center of the support body. The core rod is a threaded steel bar and is coaxial with the support body. The upper and lower ends of the core rod are flush with the upper and lower end faces of the support body respectively.

[0014] Binding wires are wound around the upper and lower ends of the peripheral wall of the core rod. The middle part of the binding wire is wound around the peripheral wall of the core rod. The two ends of the binding wire respectively penetrate the peripheral wall of the support body and extend out of the support body.

[0015] A depression is provided at the center of the upper surface of the bottom plate. The depth of the depression is greater than 2 mm.

[0016] At least three limiting members are threadedly connected to the outer peripheral wall of the holding tube. The limiting member is formed by bending a rectangular plate body into a "C" shape and having internal threads on the inner wall. The "C" shape opening width of the limiting member is the same as the opening width of the through hole.

[0017] The "C" shape opening of the limiting member is screwed onto the holding tube with the opening of the through hole misaligned.

[0018] Among the multiple limiting members, at least two limiting members are located above the connecting plate. A bearing member is provided on the holding pipe between the two uppermost limiting members. The bearing member includes a sliding column and a carrier. The sliding column is located inside the holding pipe and is in sliding contact with the inner wall of the holding pipe. The outer wall of the sliding column is connected to the carrier through a connecting plate passing through the through hole. The carrier is formed by bending a rectangular plate into a "U" shape. The carrier is horizontally sleeved on the outer periphery of the upper end of the support body, and the opening faces away from the holding pipe. The upper surface of the carrier is flush with the upper end surface of the support body.

[0019] Through the above technical solutions, the beneficial effects of the present invention are as follows:

[0020] The holding member, limiting member, and bearing member of the present invention are all reusable parts, while the bottom plate and support member are fabricated on-site before construction. This not only saves materials and avoids waste but also maintains the distance between the upper and lower layers of steel mesh sheets, preventing the upper steel mesh sheet from sinking during pouring, ensuring the designed performance of the steel mesh sheet, and guaranteeing the construction quality.

[0021] The bottom plate and support member of the present invention are fabricated on-site or delivered to a prefabrication manufacturer for production. Compared with bending and forming after cutting in the prior art, the core rod of the present invention only needs to be cut, which can ensure the design accuracy to the greatest extent, reduce the error between the upper and lower layers of steel mesh sheets to the millimeter level, and avoid the problems of poor quality, insufficient strength, and poor stability of the steel stools simply fabricated on-site, resulting in poor support and positioning of the upper steel bars.

[0022] Only the core rod of the present invention remains as a metal product in the cast-in body finally, and the rest are all concrete products, which reduces waste to the greatest extent, ensures the quality of design and construction, and can avoid the phenomenon of extending the construction settlement period due to the construction calculation errors of both the construction party and the construction unit.

[0023] The present invention is simple to use, convenient to operate, and stable in support, and is suitable for construction use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is a sectional view taken along the A-A direction of the present invention;

[0026] Figure 3 is a schematic structural diagram of the bottom plate of the present invention;

[0027] Figure 4 is a top view (enlarged) of the holding member of the present invention;

[0028] Figure 5 is a sectional view of the holding member of the present invention;

[0029] Figure 6 It is a schematic structural view of the support member of the present invention;

[0030] Figure 7 It is a sectional view of the support member of the present invention (the core rod is not sectioned);

[0031] Figure 8 It is a schematic structural view of the bearing member of the present invention;

[0032] Figure 9 It is a view of the using state of the present invention (before pouring).

[0033] The reference numerals in the drawings are: 1, bottom plate; 2, retaining member; 3, support member; 4, connecting hole; 5, connecting column; 6, retaining tube; 7, through hole; 8, penetrating hole; 9, support body; 10, connecting plate; 11, slider; 12, binding wire; 13, depression; 14, limiting member; 15, bearing member; 16, sliding column; 17, carrier; 18, connecting plate; 19, core rod. Specific Embodiments

[0034] The present invention will be further described below in conjunction with the drawings and specific embodiments:

[0035] It should be noted that the directional terms such as "front", "rear", "left", "right", "up", "down", "bottom surface" and "top surface" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively.

[0036] As Figures 1 to 9 shown, a steel bar mesh support device includes a bottom plate 1, a retaining member 2 and a support member 3. The bottom plate 1 is detachably connected to the retaining member 2, and the retaining member 2 is detachably connected to the support member 3;

[0037] The bottom plate 1 is a plate made of concrete. The bottom plate 1 is a plate-shaped body in the shape of a rectangle, square, circle, triangle or other shapes. An eccentric connection hole 4 is provided on the bottom plate 1. The connection hole 4 is a hole in the shape of a square, rectangle, triangle or other non-circular shapes. The retaining member 2 includes a connection column 5 and a retaining tube 6. The connection column 5 is a columnar body whose shape matches the shape of the connection hole 4. The connection column 5 extends into the connection hole 4 and is in sliding contact with the connection hole 4 up and down. After the connection column 5 extends into the connection hole 4, it cannot rotate and can only slide up and down. The height of the connection column 5 is less than or equal to the thickness of the bottom plate 1. The upper end of the connection column 5 extends out of the connection hole 4 and is fixedly connected with a retaining tube 6. The retaining tube 6 is a circular tube body with a closed lower end, an open upper end and an external thread provided on the outer peripheral wall. The diameter of the lower end surface of the retaining tube 6 is greater than the diameter of the circumscribed circle of the horizontal cross-section of the connection column 5. A through hole 7 penetrating the inner and outer walls of the retaining tube 6 is provided in the lower part of the retaining tube 6. The opening width of the through hole 7 is the same as the inner diameter of the retaining tube 6, and the two side walls of the through hole 7 are tangent to the inner wall of the retaining tube. A through hole 8 is provided on the peripheral wall of the retaining tube 6 above the through hole 7. The through hole 8 penetrates the inner and outer walls of the retaining tube 6. The through hole 8 is vertically communicated with the through hole 7 and the opening faces the central axis of the bottom plate 1. The through hole 8 penetrates the inner and outer walls of the retaining tube 6. The upper end of the through hole 8 penetrates the upper end surface of the retaining tube 6 and the lower end penetrates the top surface of the through hole 7. The opening width of the through hole 8 is less than the inner diameter of the retaining tube 6;

[0038] The support member 3 includes a support body 9, a connecting plate 10 and a slider 11. The support body 9 is a columnar body. The support body 9 is located above the bottom plate 1. The central axis of the support body 9 is vertically aligned with the central axis of the bottom plate 1. A connecting plate 10 is connected to the peripheral wall of the support body 9. The connecting plate 10 is a vertical plate body. The other end of the connecting plate 10 passes through the through hole 8 and is connected to the slider 11 inside the retaining tube 6. The slider 11 is in sliding contact with the inner wall of the retaining tube 6. The slider 11 is a cylinder. The diameter of the slider 11 matches the inner diameter of the retaining tube 6. The height of the slider 11 is less than the height of the through hole 7.

[0039] The bottom plate 1, the connecting plate 10 and the slider 11 are all made of concrete. The retaining member 2 is made of steel. The support body 9 is a concrete column.

[0040] The length of the retaining tube 6 is greater than the length of the support body 9.

[0041] A core rod 19 is fixed at the center of the support body 9. The core rod 19 is a threaded steel bar. The core rod 19 is coaxial with the support body 9, and the upper and lower ends of the core rod 19 are flush with the upper and lower end surfaces of the support body 9 respectively. In the prior art, the diameter of the steel bars used for the steel saddle supporting the upper steel mesh is consistent with the diameter of the steel bars used for the steel mesh, and the steel saddles are all formed by bending longer steel bars, which invisibly leads to waste of steel bars and insufficient supporting force. The present invention uses a support body made of concrete, which can increase the supporting force and increase the load. The core rod only enhances the bending deflection of the support body, improves the impact resistance of the support body, and avoids breakage due to vibration. Therefore, the use of small-diameter steel bars can still achieve the corresponding effect, that is: the support body of the present invention only uses small-diameter steel bars as core rods, which can also effectively support the upper and lower layers of steel mesh.

[0042] The upper and lower ends of the peripheral wall of the core rod 19 are wrapped with binding wires 12, and the middle part of the binding wires 12 is wrapped around the peripheral wall of the core rod 19. Concrete is poured outside the core rod 19 with the binding wires 12, and the concrete poured outside the core rod 19 constitutes the support body 9 outside the core rod 19. The two ends of the binding wires 12 respectively penetrate the peripheral wall of the support body 9 and extend out of the support body 9. The binding wires are used to bind the upper and lower layers of steel mesh so that the spacing between the upper and lower layers of steel mesh is consistent and they are firmly connected to the support body 9.

[0043] A depression 13 is provided at the center of the upper surface of the base plate 1, and the depth of the depression 13 is greater than 2 mm, so that there is a gap between the steel bars on the lower steel mesh and the bottom surface of the depression 13, which facilitates the binding wire 12 to pass through the depression 13 and bypass the steel bars to smoothly bind the support body and the lower steel mesh.

[0044] At least three limit members 14 are threadedly connected to the outer wall of the retaining tube 6. The limit members 14 are rectangular plates bent into a "C" shape and have internal threads on the inner wall. The "C"-shaped opening width of the limit members 14 is consistent with the width of the through hole 8. The limit members 14 play a role in limiting and fixing, avoiding a reduction in the bending strength due to the through holes on the retaining tube 6, improving the bending resistance and load of the retaining tube 6, and ensuring sufficient strength.

[0045] The "C"-shaped opening of the limit member 14 is staggered with the through hole 8 and is screwed on the retaining tube 6. When the "C"-shaped opening of the limit member 14 is opposite to the through hole 8 of the retaining tube 6, the retaining tube 6 can be pulled out upward so that the retaining tube 6 can be reused, while the support body 9 is retained to support the upper steel mesh, thereby avoiding sinking of the upper steel mesh due to loss of support and ensuring the spacing between the upper and lower steel mesh layers.

[0046] Among the multiple limiting members 14, at least two limiting members 14 are located above the connecting plate 10. A bearing member 15 is provided on the holding tube 6 between the two uppermost limiting members 14. The bearing member 15 includes a sliding column 16 and a carrier 17. The sliding column 16 is located inside the holding tube 6 and is in sliding contact with the inner wall of the holding tube 6. The outer wall of the sliding column 16 is connected to the carrier 17 through a connecting plate 18 passing through the through hole 8. The carrier 17 is formed by bending a rectangular plate into a "U" shape. The carrier 17 is horizontally sleeved on the outer periphery of the upper end of the support body 9, and the opening faces away from the holding tube 6. The connecting plate 18 is connected to the middle of the carrier 17. The two ends of the carrier 17 are respectively located on both sides of the upper end of the support body 9. The upper surface of the carrier 17 is flush with the upper end surface of the support body 9. The carrier 17 and the support body 9 jointly support the upper layer of steel mesh, making the upper layer of steel mesh more stable. Before pouring, when workers walk and operate on the upper layer of steel mesh, the upper layer of steel mesh will not sink.

[0047] According to the construction requirements, use molds to mass-produce the bottom plate and the support members. Determine the thickness of the bottom plate 1 based on the protective layer thickness, and determine the length of the support body 9 based on the distance between the two layers of steel mesh. Pour concrete to make the bottom plate 1, cut the core rod 19, wind binding wire around the core rod 19, and pour concrete to form the support body 9 outside the core rod 19.

[0048] The limiting member 14 is always connected to the holding tube 6 of the present invention. By rotating the limiting member 14, the position of the limiting member 14 can be adjusted, so that multiple limiting members are relatively evenly connected to the peripheral wall of the holding tube 6 without affecting the connecting plate 10 and the connecting plate 18.

[0049] In use, first place the bottom plate 1 under the lower steel mesh. The lower surface of the bottom plate 1 contacts the foundation surface or the formwork surface, so that the center of the bottom plate 1 is located below the intersection of the steel bars of the lower steel mesh, and the connection holes 4 on the bottom plate 1 are vertically aligned with the mesh holes of the steel mesh. Then keep the tube 6 passing through the mesh holes of the steel mesh, and insert the connection column 5 into the connection hole 4, so that the through hole 8 is aligned with the central axis of the bottom plate 1, and the central axis of the support body 9 is vertically aligned with the center of the bottom plate 1. Adjust the opening direction of the limiting member 14 on the holding tube 6 so that the "C"-shaped opening of the limiting member 14 faces the through hole 8 of the holding tube 6. The slider 11 enters the holding tube 6 from the upper end of the holding tube 6 and slides downward until the lower end of the support body 9 contacts the steel bars of the lower steel mesh. Use a binding hook to tie the binding wire 12 at the lower end of the core rod to the lower steel mesh. Adjust the opening direction of the limiting member 14 again so that except for one limiting member 14 at the uppermost position, the "C"-shaped openings of the other limiting members 14 are misaligned with the through hole 8 of the holding tube 6. At this time, the support member 3 is held by the holding tube 6, and the support body 9 is connected to the lower steel mesh. Insert the sliding column 16 of the carrier 15 into the holding tube 6 from the upper end of the holding tube 6 and slide downward until it contacts the second limiting member 14 screwed onto the outer periphery of the holding tube 6 from top to bottom. Rotate this limiting member 14 so that the upper surface of the carrier 17 is flush with the upper surface of the support body 9. Rotate the limiting member 14 above the carrier 15 so that the two limiting members 14 at the uppermost position clamp the carrier 15. Then lay the upper steel mesh so that the intersection of the steel bars of the upper steel mesh is located at the upper end of the support body 9 and is supported by the support body 9 and the carrier 17. Use the binding wire 12 at the upper end of the core rod to tie the upper steel mesh. At this time, the upper steel mesh is fixed, and even if workers walk and work on the upper steel mesh, the upper steel mesh will not sink due to trampling.

[0050] Before pouring, except for one limiting member 14 adjacent to the upper part of the carrier 15 and one limiting member 14 adjacent to the upper part of the support member 3 that are not rotated, the remaining limiting members 14 are all rotated so that the "C"-shaped openings face the through hole 8 of the holding tube 6. The carrier 15 slides downward, away from the upper steel mesh, and then lifts the holding member 2 upward through the mesh holes of the upper steel mesh and then moves away from the central axis of the bottom plate 1. Since the sliding column 16 on the carrier 15 is located in the holding tube 6, when the holding member 2 moves away from the central axis of the bottom plate 1, the synchronous belt separates from the carrier 15, and the slider 11 of the support member 3 exits the holding tube 6 from the through hole 7. The holding member 2 and the carrier can be removed synchronously for repeated use, and only the support member 3 is retained between the upper and lower steel meshes to maintain the spacing between the upper and lower steel meshes.

[0051] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various deformations of the technical solutions of the present invention can be made without departing from the spirit of the present invention, that is, within the scope of disclosure.

Claims

1. A steel bar mesh support device, characterized in that, It includes a bottom plate (1), a holding member (2) and a support member (3). The bottom plate (1) is detachably connected to the holding member (2), and the holding member (2) is detachably connected to the support member (3). An eccentric connection hole (4) is provided on the bottom plate (1). The holding member (2) includes a connection column (5) and a holding tube (6). The connection column (5) extends into the connection hole (4) and is in sliding contact with the connection hole (4) up and down. A holding tube (6) is fixedly connected to the upper end of the connection column (5). A through hole (7) penetrating the inner and outer walls of the holding tube (6) is provided in the lower part of the holding tube (6). The opening width of the through hole (7) is the same as the inner diameter of the holding tube (6). A through hole (8) is provided on the peripheral wall of the holding tube (6) above the through hole (7). The through hole (8) is vertically communicated with the through hole (7) and the opening faces the central axis of the bottom plate (1). The opening width of the through hole (8) is smaller than the inner diameter of the holding tube (6). The support member (3) includes a support body (9), a connecting plate (10) and a slider (11). The support body (9) is located above the bottom plate (1). The central axis of the support body (9) is vertically aligned with the center of the bottom plate (1). A connecting plate (10) is connected to the peripheral wall of the support body (9). The other end of the connecting plate (10) passes through the through hole (8) and is connected to the slider (11) inside the holding tube (6). The slider (11) is in sliding contact with the inner wall of the holding tube (6). The height of the slider (11) is smaller than the height of the through hole (7). At least three limiting members (14) are threadedly connected to the outer peripheral wall of the holding tube (6). The limiting member (14) is formed by bending a rectangular plate body into a "C" shape and having internal threads on the inner wall. The opening width of the "C" shape of the limiting member (14) is the same as the opening width of the through hole (8).

2. The steel bar mesh support device according to claim 1, characterized in that, The bottom plate (1), the connecting plate (10) and the slider (11) are all made of concrete. The holding member (2) is made of steel. The support body (9) is a concrete column body.

3. A steel bar mesh support device according to claim 1, characterized in that, The length of the holding tube (6) is greater than the length of the support body (9).

4. The steel bar mesh support device according to claim 1, characterized in that, A core rod (19) is fixed at the center of the support body (9). The core rod (19) is a threaded steel bar and is coaxial with the support body (9). The upper and lower ends of the core rod (19) are flush with the upper and lower end faces of the support body (9).

5. The steel bar mesh support device according to claim 4, characterized in that Binding wires (12) are wound around the upper and lower ends of the peripheral wall of the core rod (19). The middle part of the binding wire (12) is wound around the peripheral wall of the core rod (19). The two ends of the binding wire (12) respectively penetrate the peripheral wall of the support body (9) and extend outside the support body (9).

6. The reinforcing mesh support device according to claim 1, characterized in that, A depression (13) is provided at the center of the upper surface of the bottom plate (1). The depth of the depression (13) is greater than 2 mm.

7. A steel bar mesh support device according to claim 1, characterized in that, The "C" shape opening of the limiting member (14) is screwed onto the holding tube (6) with the opening of the through hole (8) misaligned.

8. The steel bar mesh support device according to claim 1, characterized in that, Among the multiple limiting members (14), at least two limiting members (14) are located above the connecting plate (10). A bearing member (15) is provided on the holding tube (6) between the two uppermost limiting members (14). The bearing member (15) includes a sliding column (16) and a bearing body (17). The sliding column (16) is located inside the holding tube (6) and is in sliding contact with the inner wall of the holding tube (6). The outer wall of the sliding column (16) is connected to the bearing body (17) through a connecting plate (18) passing through the through hole (8). The bearing body (17) is formed by bending a rectangular plate into a "U" shape. The bearing body (17) is horizontally sleeved on the outer periphery of the upper end of the support body (9), and the opening faces away from the holding tube (6). The upper surface of the bearing body (17) is flush with the upper end surface of the support body (9).

Images