A clamp for controlling the spacing of reserved steel bars and the thickness of protective layer in construction joints of floor slabs

Abstract

The invention discloses a clamp for controlling the spacing of reserved steel bars and the thickness of a protective layer at a construction joint of a floor slab, comprising: a sliding assembly, a supporting crossbeam and a bottom rod structure; the sliding assembly is a freely sliding structure, a freely rotatable ball bearing is provided at the bottom of the sliding assembly, the top of the sliding assembly is connected to a flip rod and a rotating head assembly, the rotating head assembly is rotatably connected to a linkage rod, the bottom of the linkage rod is fixedly connected to a telescopic assembly, and the upper and lower ends of a plurality of telescopic assemblies are respectively fixedly connected to the supporting crossbeam; a plurality of protective layer control ends are installed on the outer side of the supporting crossbeam through a sliding groove and a sliding head, and the sliding heads are rotatably connected to a cross arm through a connecting head; the bottom rod structure is arranged below the sliding assembly, the sliding assembly is in sliding contact with the upper side of the bottom rod structure through the ball bearing, a sliding rod of a T-shaped structure is fixed to the top of the bottom rod structure, the sliding assembly is sleeved on the outside of the sliding rod, and a supporting plate and a contact plate are fixed to the bottom of the bottom rod structure through a groove.

Description

Technical Field

[0001] The invention relates to the technical field of building clamps, in particular to a clamp for controlling the spacing of reserved steel bars and the thickness of a protective layer at a construction joint of a floor slab. Background Art

[0002] In existing projects, during the construction process, it is difficult to strictly follow the specification error requirements for the reserved position, spacing and thickness of the protective layer of the construction joint steel bars manually. The actual spacing between the steel bars may exceed the specification requirements, thereby affecting the stability and safety of the structure. Therefore, a clamp is needed to control the spacing of the reserved steel bars and the thickness of the protective layer of the floor slab construction joint. The existing technology is limited to the use of manual positioning, ladder bars or finished concrete pads. The use of manual positioning is easily affected by factors such as the construction environment and the skills of the operators, and the accuracy of the steel bar spacing and the protective layer thickness cannot be ensured. The ladder bars can only be used for wall steel bar control and cannot be adjusted according to the actual spacing of the steel bars. The concrete pads are prone to displacement during installation, and the supporting effect of the pads is unstable. Secondly, as disposable items, the pads cannot be reused, resulting in waste and additional costs. In addition, the spacing of the steel bars and the thickness of the protective layer are not convenient to control, the construction accuracy is limited, and the problem of the steel bar spacing not meeting the design standards is prone to occur. In addition, the installation process is complicated, the construction is relatively complicated, and the labor and time costs are high. Summary of the invention

[0003] The purpose of the present invention is to provide a clamp for controlling the spacing of reserved steel bars and the thickness of protective layer of construction joints of floor slabs, so as to solve the problem of inaccurate control of the spacing of reserved steel bars and the thickness of protective layer of construction joints in existing construction projects.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a clamp for controlling the spacing of reserved steel bars and the thickness of a protective layer in a construction joint of a floor slab, comprising: a sliding assembly, a supporting crossbeam and a bottom rod structure; the sliding assembly is a freely sliding structure, a freely rotatable ball is provided at the bottom of the sliding assembly, the top of the sliding assembly is connected to the flip rod and the rotating head assembly, the rotating head assembly is rotatably connected to the linkage rod, the bottom of the linkage rod is fixedly connected to the telescopic assembly, a plurality of telescopic assemblies are provided, and the upper and lower ends of the plurality of telescopic assemblies are respectively fixedly connected to the supporting crossbeam; a plurality of protective layer control ends are installed on the outer side of the supporting crossbeam through a sliding groove and a sliding head, and the sliding heads are rotatably connected to the cross arm through a connecting head; the bottom rod structure is arranged below the sliding assembly, the sliding assembly is in sliding contact with the upper side of the bottom rod structure through the ball, a sliding rod of a T-shaped structure is fixed to the top of the bottom rod structure, the sliding assembly is sleeved on the outside of the sliding rod, a supporting plate and a contact plate are fixed to the bottom of the bottom rod structure through a groove, the bottom end of the contact plate protrudes from the bottom of the bottom rod structure, and the bottom end of the contact plate is provided with anti-slip teeth.

[0005] In a preferred embodiment, the sliding assembly is an L-shaped structure, and two adjacent sliding assemblies are welded and fixed by connecting rods. Two T-shaped guide rods are fixed to the top of each connecting rod, and a freely pullable fixing rod is inserted into the front end of each sliding assembly.

[0006] In a preferred embodiment, three telescopic assemblies and three fixed rods are provided, the top ends of the three fixed rods are welded and fixed to the moving rod assembly, a pulling piece is fixed to the top end of the moving rod assembly, four L-shaped sliding pieces are welded to the inner bottom of the moving rod assembly, and the sliding pieces are mounted on the outside of the guide rod and can be pulled freely.

[0007] In a preferred embodiment, the flip rod is arranged obliquely, the top end of the flip rod is welded and fixed to the rotating head assembly of the U-shaped structure, and the rotating head assembly is sleeved on the outside of the linkage rod and rotates freely.

[0008] In a preferred embodiment, a T-shaped sliding groove is provided at the top of the supporting beam, an opening is provided at the right end of the sliding groove, a T-shaped sliding head is inserted into the sliding groove and can slide freely inside the sliding groove, a connecting head is fixed on each side of the sliding head, the connecting head is rotatably connected to the cross arm, and the cross arm is a diamond frame structure.

[0009] In a preferred embodiment, among the row of protective layer control ends located at the bottom, three protective layer control ends are height-adjustable structures that can be rotated by bolts, the protective layer control end at the rightmost end of the sliding groove is fixed by bolts, and a pulling plate is fixed to the outside of the sliding head at the leftmost end of the sliding groove, and bolts are inserted into the interior of the pulling plate through threaded holes and fixed by bolts.

[0010] In a preferred embodiment, evenly arranged circular holes are provided at the top of the sliding rod, a movable rod assembly is inserted into the circular hole, the inclined support plate is made of elastic metal material, a counterweight block is fixed to the outer end of the bottom rod structure, and a circular hole is provided in the middle of the counterweight block for inserting a nail for fixing.

[0011] In a preferred embodiment, an outer member structure is fixed to the outer end of the bottom rod structure, an inclined slide groove is provided inside the outer member structure, a wedge-shaped groove is provided at the bottom of the outer member structure, a bottom member structure is slidably embedded inside the wedge-shaped groove, an anti-slip groove is provided at the bottom of the bottom member structure, and an insertion rod of a T-shaped structure is fixed on both sides of the bottom member structure, a cross bar is fixed between the two insertion rods, and the cross bar is inserted into the inclined slide groove.

[0012] In a preferred embodiment, a spring is installed at the top of the outer structure through a round rod, a movable plate is sleeved on the outside of the round rod, the spring continuously pushes the movable plate to move, and a freely pullable insertion rod is slidably inserted into the inside of the movable plate.

[0013] The present invention also provides a method for using the clamp for controlling the spacing of reserved steel bars and the thickness of the protective layer of the floor construction joint, comprising the following steps:

[0014] S1. Construction personnel adjust the position of the protective layer control end according to the designed diameter and spacing of the floor slab reinforcement;

[0015] S2. According to the floor thickness and the spacing between the steel bars, control the loosening of the bolts, pull the sliding head by pulling the plate, adjust the multiple sliding heads equidistantly through the cross arm, and adjust the position of multiple protective layer control ends accurately, and then re-tighten the bolts;

[0016] S3. Install the fixture after stacking the lower layer of steel bars on the floor slab, fix the lower layer of steel bars on the fixture, and make the contact plate contact with the installation position in a non-slip manner. The spring continuously pushes the moving plate to move, so that the crossbar moves inside the inclined slide slot, and the bottom structure moves obliquely;

[0017] S4. If the protection layer control end cannot meet the protection layer control requirements of the lower mesh, the three protection layer control ends can be controlled to rotate and adjust;

[0018] S5. Install the upper steel mesh, tie the steel bars to the corresponding protective layer control end according to the design spacing requirements. When the upper support beam is in use, pull the moving rod assembly and the fixed rod up, so that the sliding assembly can slide and move horizontally. After the displacement, the fixed rod is inserted into the circular hole. When the sliding assembly moves, it drives the flip rod and the rotating head assembly to flip, push the linkage rod to move up and down, and make the telescopic assembly telescope up and down. Adjust the spacing so that the upper protective layer meets the requirements;

[0019] S6. After the floor slab concrete is poured and finally set, remove the fixture and reuse it in the next location.

[0020] Compared with the prior art, the clamp for controlling the spacing of reserved steel bars and the thickness of the protective layer of the floor construction joint of the present invention has the following beneficial effects:

[0021] After the sliding assembly of the present invention is installed in conjunction with the supporting crossbeam and the bottom rod structure, if the spacing between the steel bars needs to be adjusted, the sliding head and the protective layer control end can be pulled together by the pulling plate, and displaced together through the cross arm. Since the cross arms have the same size and model, the spacing of multiple protective layer control ends can be flexibly adjusted, and the spacing is still equal in length, so there is no need to adjust the spacing one by one in turn, thereby improving the flexibility of the actual spacing change of the steel bars during construction, thereby ensuring that the spacing between the steel bars always meets the standard error requirements and preventing the steel bars from being displaced during the installation process.

[0022] After the sliding assembly is used in conjunction with the supporting beam and the bottom rod structure, the sliding assembly can be controlled to slide outward to retract the supporting beam for easy removal and reuse, thereby reducing material waste and costs, improving economy, and having significant technical advantages. It can effectively solve the problem of inaccurate control of the spacing of reserved steel bars and the thickness of the protective layer in construction joints in existing construction projects. At the same time, it can be disassembled and reused, reducing construction complexity and saving labor and time costs.

[0023] When the sliding assembly is in use, it can slide on the top of the sliding rod. The flip rod and the rotating head assembly push the linkage rod and the telescopic rod, which pushes the telescopic assembly to extend, driving the supporting beam to adjust the height, effectively controlling the spacing of the steel bars and the thickness of the protective layer, greatly improving the construction accuracy, and avoiding the problem of the steel bar spacing not meeting the design standards.

[0024] When the clamp is placed and fixed, the pressing support plate and the contact plate are contacted and fixed with the installation position in an anti-slip manner, thereby improving the fixing effect. At the same time, the spring can continuously push the movable plate to move outward, so that the cross bar slides inside the inclined slide groove, so that the bottom structure can move in an inclined state, so that the bottom of the bottom structure contacts the ground, and the anti-slip fixed sliding component can improve the positioning and fixing installation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the three-dimensional structure of the present invention is shown;

[0026] Figure 2 A bottom-up structural schematic diagram of the present invention is shown;

[0027] Figure 3 A schematic diagram of the top view of the structure of the present invention in use state is shown;

[0028] Figure 4 The exploded three-dimensional structure schematic diagram of the present invention is shown;

[0029] Figure 5 A schematic diagram of the exploded three-dimensional structure of the sliding assembly of the present invention is shown;

[0030] Figure 6 The supporting crossbeam of the present invention and a partially enlarged three-dimensional structural schematic diagram are shown;

[0031] Figure 7 A schematic diagram of the three-dimensional structure of the bottom rod structure of the present invention is shown;

[0032] Figure 8 A schematic diagram of a three-dimensional structure using the bottom rod structure of Example 2 of the present invention is shown.

[0033] Description of reference numerals:

[0034] 1. Sliding assembly; 101. Connecting rod; 102. Fixed rod; 103. Moving rod assembly; 104. Sliding piece; 105. Flipping rod; 106. Rotating head assembly; 107. Linking rod; 108. Telescopic assembly; 2. Supporting beam; 201. Sliding groove; 202. Sliding head; 203. Connecting head; 204. Cross arm; 205. Protective layer control end; 206. Pulling plate; 3. Bottom rod structure; 301. Sliding rod; 302. Support plate; 303. Contact plate; 304. Counterweight block; 305. External structure; 306. Moving plate; 307. Inserting rod; 308. Bottom structure. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] like Figures 1 to 8 As shown, the clamp for controlling the spacing of reserved steel bars and the thickness of the protective layer of the construction joint of the floor slab of the present invention comprises: a sliding component 1, a supporting beam 2 and a bottom rod structure 3. The sliding component 1 is a freely sliding structure. The bottom of the sliding component 1 is provided with a freely rotatable ball. The top of the sliding component 1 is connected to the flip rod 105 and the rotating head component 106. The rotating head component 106 is rotatably connected to the linkage rod 107. The bottom of the linkage rod 107 is fixedly connected to the telescopic component 108. In the present embodiment, there are three telescopic components 108. After the sliding component 1 slides, the telescopic component 108 is controlled to extend, and the supporting beam 2 is controlled to freely adjust the height, thereby effectively controlling the spacing of the protective layer. At the same time, the supporting beam 2 can also be controlled to retract, so that the clamp as a whole can be removed for easy reuse to avoid waste. The upper and lower ends of the three telescopic components 108 are respectively welded and fixed to a supporting beam 2. The outer side of the supporting beam 2 is installed with a protective layer control end 205 through a sliding groove 201 and a sliding head 202. The sliding heads 202 are rotatably connected to the cross arm 204 through a connecting head 203, so that multiple protective layer control ends 205 can be adjusted equidistantly, and the spacing can be effectively and quickly adjusted.

[0038] Among the row of protective layer control ends 205 at the bottom, three protective layer control ends 205 are height-adjustable structures that can be rotated by bolts, so that these three protective layer control ends 205 can adjust the lower steel mesh layer. The sliding component 1 is installed above the bottom rod structure 3. The sliding component 1 is in sliding contact with the top of the bottom rod structure 3 through a ball bearing. A T-shaped sliding rod 301 is fixed to the top of the bottom rod structure 3. The sliding component 1 is mounted on the outside of the sliding rod 301 and slides freely. A support plate 302 and a contact plate 303 are fixed to the bottom of the bottom rod structure 3 through a groove. The bottom end of the contact plate 303 protrudes from the bottom of the bottom rod structure 3. The bottom end of the contact plate 303 is provided with anti-slip teeth. After the contact plate 303 is subjected to force, it is anti-slip contacted and fixed to the installation position, so that the clamp as a whole can be stably installed and used.

[0039] In this embodiment, Figure 4 and Figure 5 As shown, the sliding assembly 1 is an L-shaped structure. The three sliding assemblies 1 are welded and fixed by two connecting rods 101, so that the three sliding assemblies 1 can move at the same time. Two T-shaped guide rods are fixed to the top of each connecting rod 101 to control the moving rod assembly 103 and the sliding member 104 to guide the sliding. A freely pullable fixed rod 102 is inserted into the front end of each sliding assembly 1 and inserted into the inside of the round hole at the same time, so that the sliding assembly 1 is fixed after sliding. There are three fixed rods 102 in total. The tops of the three fixed rods 102 are welded and fixed to the moving rod assembly 103. A pull piece is fixed to the top of the moving rod assembly 103 to facilitate the up and down movement of the moving rod assembly 103 and the fixed rod 102. Four L-shaped sliding members 104 are welded to the inner bottom of the moving rod assembly 103. The sliding member 104 is set on the outside of the guide rod and can be pulled freely. The flip rod 105 is set at an angle, and the top of the flip rod 105 is welded and fixed to the rotating head assembly 106 of the U-shaped structure. The rotating head assembly 106 is mounted on the outside of the linkage rod 107 and can rotate freely. The movement of the linkage rod 107 can be controlled by the flip rod 105 and the rotating head assembly 106, so that the telescopic assembly 108 can drive the supporting beam 2 to freely adjust the height for use.

[0040] In this embodiment, Figure 3 and Figure 6As shown, a T-shaped sliding groove 201 is provided at the top of the supporting crossbeam 2, and an opening is provided at the right end of the sliding groove 201 so that the sliding head 202 can be disassembled for easy maintenance. A T-shaped sliding head 202 is inserted into the sliding groove 201 and freely slides and moves inside the sliding groove 201 to drive the protective layer control end 205 to move freely for easy adjustment of the spacing. A connecting head 203 is fixed on each side of the sliding head 202 for rotational connection with a cross arm 204. The connecting head 203 is rotationally connected with the cross arm 204. The cross arm 204 is a diamond frame structure that can be freely rotated and deformed, so that multiple protective layer control ends 205 can be adjusted equidistantly. The protective layer control end 205 at the rightmost end of the sliding groove 201 is fixed by bolts, and the protective layer control end 205 at the rightmost end can be fixed and installed. A pulling plate 206 is fixed on the outside of the sliding head 202 at the leftmost end of the sliding groove 201. Bolts are inserted into the interior of the pulling plate 206 through threaded holes and are fixed by bolts. The protective layer control end 205 can be moved and adjusted in position by pulling the pulling plate 206, and can be fixed by bolts.

[0041] In this embodiment, Figure 7 As shown, the top of the sliding rod 301 is provided with evenly arranged round holes, and the moving rod assembly 103 is inserted into the inside of the round hole to fix the sliding assembly 1 in an appropriate position. The inclined support plate 302 is made of elastic metal material and is used with the help of elastic support contact plate 303. The outer end of the bottom rod structure 3 is fixed with a counterweight block 304 to increase the weight and improve stability. The middle position of the counterweight block 304 is provided with a round hole for inserting a nail for fixing, and the nail can be used for stable fixing.

[0042] The method for using the clamp for controlling the reserved steel bar spacing and the protective layer thickness of the floor slab construction joint of the present embodiment comprises the following steps:

[0043] Step S1. The construction personnel adjust the position of the protective layer control end 205 according to the designed diameter and spacing of the floor slab reinforcement;

[0044] Step S2. According to the floor thickness and the equidistant of the steel bars, the bolts are controlled to be loosened, and the sliding head 202 is displaced by pulling the pulling plate 206, so that the multiple sliding heads 202 are equidistantly adjusted through the cross arm 204, so that the multiple protective layer control ends 205 are accurately adjusted in position for use, and then the bolts are retightened;

[0045] Step S3. After the lower layer of steel bars of the floor slab are stacked, the fixture is installed, the lower layer of steel bars are fixed on the fixture, and the contact plate 303 is in anti-slip contact with the installation position. The spring continuously pushes the moving plate 306 to move, so that the crossbar moves inside the inclined chute, and the bottom structure 308 moves obliquely;

[0046] Step S4. If the protection layer control end 205 cannot meet the protection layer control requirements of the lower mesh, the three protection layer control ends 205 can be controlled to rotate and adjust;

[0047] Step S5. Install the upper steel mesh, tie the steel bars to the corresponding protective layer control end 205 according to the design spacing requirements, and when the upper support beam 2 is used, pull the moving rod assembly 103 and the fixed rod 102 up, so that the sliding assembly 1 can slide and move laterally. After the displacement, the fixed rod 102 is inserted into the circular hole. When the sliding assembly 1 moves, it drives the flip rod 105 and the rotating head assembly 106 to flip, and pushes the linkage rod 107 to move up and down, so that the telescopic assembly 108 can be telescoped up and down, and the spacing is adjusted to make the upper protective layer meet the requirements;

[0048] Step S6. After the floor slab concrete is poured and finally set, the fixture is removed and reused in the next location. At this point, the use process of the device is completed.

[0049] Embodiment 2:

[0050] On the basis of Example 1, Figure 8 As shown, an outer part structure 305 is fixed to the outer end of the bottom rod structure 3, and an inclined sliding groove is opened inside the outer part structure 305. A wedge-shaped groove is provided at the bottom of the outer part structure 305, and a bottom part structure 308 is embedded and slidably installed inside the wedge-shaped groove. An anti-slip groove is provided at the bottom of the bottom part structure 308, and an insertion rod 307 of a T-shaped structure is fixed on both sides of the bottom part structure 308. A cross bar is fixed between the two insertion rods 307, and the cross bar is inserted into the inclined sliding groove and slides inside. A spring is installed at the top of the outer part structure 305 through a round rod, and a movable plate 306 is sleeved on the outside of the round rod. The spring continuously pushes the movable plate 306 to move, and the movable plate 306 is inserted into the inner sliding of the movable plate 306, which can be freely pulled out and can be used at the outer end of the bottom rod structure 3. At the beginning, the spring continuously pushes the movable plate 306 to move outward, so that the cross bar slides and displaces inside the inclined sliding groove, so that the bottom part structure 308 moves obliquely, protruding from the bottom of the bottom rod structure 3 and in non-slip contact with the installation position, thereby improving stability.

[0051] Working principle of the fixture for controlling the spacing of reserved steel bars and the thickness of protective layer in the construction joint of the floor slab of this embodiment:

[0052] Preparation: The construction personnel adjust the position of the protective layer control end 205 according to the designed diameter and spacing of the floor slab reinforcement. According to the thickness of the floor slab and the equal spacing of the reinforcement, the bolts are first controlled to be loose, and the sliding head 202 is pulled by the pulling plate 206 to move, so that multiple sliding heads 202 are adjusted at equal distances through the cross arm 204, so that multiple protective layer control ends 205 are accurately adjusted in position for use, and then the bolts are re-tightened;

[0053] Installation work: first install the clamp after the lower layer of steel bars of the floor slab is stacked, fix the lower layer of steel bars on the clamp, and at the same time make the contact plate 303 contact with the installation position in an anti-slip manner. The spring continuously pushes the movable plate 306 to move, so that the cross bar moves inside the inclined slide groove, and the bottom structure 308 moves obliquely, thereby improving the anti-slip fixing effect and the stability of the installation. If the protective layer control end 205 cannot meet the protective layer control requirements of the lower mesh, the three protective layer control ends 205 can be controlled to rotate and adjust, and then the upper steel mesh is installed. The steel bars are tied to the corresponding protective layer control ends 205 according to the design spacing requirements. When the upper supporting crossbeam 2 is used, the movable rod assembly 103 and the fixed rod 102 can be pulled up to allow the sliding assembly 1 to slide and displace laterally. After the displacement, the fixed rod 102 is inserted into the circular hole. When the sliding assembly 1 moves, it drives the flip rod 105 and the rotating head assembly 106 to flip, and pushes the linkage rod 107 to move up and down, so that the telescopic assembly 108 can be telescoped up and down, and the spacing is adjusted so that the upper protective layer meets the requirements;

[0054] Dismantling work: After the floor slab concrete is poured and finally set, remove the fixture and reuse it in the next location.

[0055] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A clamp for controlling the spacing of reserved steel bars and the thickness of protective layer of floor construction joints, characterized in that: include: A sliding assembly (1), a supporting beam (2) and a bottom bar structure (3); The sliding assembly (1) is a freely sliding structure. A freely rotatable ball is provided at the bottom of the sliding assembly (1). The top of the sliding assembly (1) is connected to the flip rod (105) and the rotating head assembly (106). The rotating head assembly (106) is rotatably connected to the linkage rod (107). The bottom of the linkage rod (107) is fixedly connected to the telescopic assembly (108). A plurality of telescopic assemblies (108) are provided. The upper and lower ends of the plurality of telescopic assemblies (108) are respectively fixedly connected to the supporting crossbeam (2). A plurality of protective layer control ends (205) are installed on the outer side of the supporting crossbeam (2) via a sliding groove (201) and a sliding head (202), and the sliding heads (202) are rotatably connected to the cross arms (204) via a connecting head (203); The bottom rod structure (3) is arranged below the sliding assembly (1); the sliding assembly (1) is in sliding contact with the top of the bottom rod structure (3) via a ball bearing; a sliding rod (301) of a T-shaped structure is fixed to the top of the bottom rod structure (3); the sliding assembly (1) is sleeved on the outside of the sliding rod (301); a support plate (302) and a contact plate (303) are fixed to the bottom of the bottom rod structure (3) via a groove; the bottom end of the contact plate (303) protrudes from the bottom of the bottom rod structure (3), and the bottom end of the contact plate (303) is provided with anti-slip teeth; The sliding assembly (1) is an L-shaped structure. Two adjacent sliding assemblies (1) are welded and fixed via connecting rods (101). Two T-shaped guide rods are fixed to the top of each connecting rod (101). A freely pullable fixed rod (102) is inserted into the front end of each sliding assembly (1). The telescopic assembly (108) and the fixed rod (102) are each provided with three. The top ends of the three fixed rods (102) are welded and fixed to the moving rod assembly (103). A pulling piece is fixed to the top end of the moving rod assembly (103). Four L-shaped sliding members (104) are welded to the inner bottom of the moving rod assembly (103). The sliding members (104) are sleeved on the outside of the guide rods and can be pulled freely. Among the row of protective layer control ends (205) located at the bottom, three protective layer control ends (205) are structures that can be rotated and adjusted in height by bolts, the rightmost protective layer control end (205) in the sliding slot (201) is fixed by bolts, and a pulling plate (206) is fixed to the outside of the sliding head (202) at the leftmost end of the sliding slot (201), and bolts are inserted into the interior of the pulling plate (206) through threaded holes and are fixed by bolts; The top of the sliding rod (301) is provided with evenly arranged circular holes, the inside of which is inserted the moving rod assembly (103), the inclined support plate (302) is made of elastic metal, the outer end of the bottom rod structure (3) is fixed with a counterweight block (304), the outer end of the bottom rod structure (3) is fixed with an outer structure (305), the inside of the outer structure (305) is provided with an inclined sliding groove, the bottom of the outer structure (305) is provided with a wedge-shaped groove, the inside of which is embedded and slidably installed with a bottom structure (308).

2. The fixture for controlling the spacing of reserved steel bars and the thickness of protective layer of the floor construction joint according to claim 1, characterized in that: The flip rod (105) is arranged in an inclined manner, and the top end of the flip rod (105) is welded and fixed to a rotating head assembly (106) of a U-shaped structure, and the rotating head assembly (106) is sleeved on the outside of the linkage rod (107) and rotates freely.

3. The fixture for controlling the spacing of reserved steel bars and the thickness of protective layer of the floor construction joint according to claim 2, characterized in that: A T-shaped sliding groove (201) is provided at the top end of the supporting crossbeam (2), an opening is provided at the right end of the sliding groove (201), a T-shaped sliding head (202) is inserted into the sliding groove (201) and is freely slidable in the sliding groove (201), a connecting head (203) is fixed on each side of the sliding head (202), the connecting head (203) is rotatably connected to a cross arm (204), and the cross arm (204) is a diamond frame structure.

4. The fixture for controlling the spacing of reserved steel bars and the thickness of protective layer of the floor construction joint according to claim 3 is characterized in that: The bottom of the bottom structure (308) is provided with an anti-slip groove, and an insertion rod (307) of a T-shaped structure is fixed on both sides of the bottom structure (308), a cross bar is fixed between the two insertion rods (307), and the cross bar is inserted into the inside of the inclined sliding groove, and a spring is installed on the top of the outer structure (305) through a round rod, and a movable plate (306) is sleeved on the outside of the round rod. The spring is displaced by continuously pushing the movable plate (306), and the inside of the movable plate (306) is slidably inserted with a freely withdrawable insertion rod (307).

5. The method for using the clamp for controlling the spacing of reserved steel bars and the thickness of protective layer of a floor construction joint as described in any one of claims 1 to 4, characterized in that: The following steps are involved: S1. The construction personnel adjust the position of the protective layer control end (205) according to the designed diameter and spacing of the floor slab reinforcement; S2, according to the thickness of the floor slab and the spacing between the steel bars, the bolts are controlled to be loosened, and the sliding head (202) is pulled to move by the pulling plate (206), so that the multiple sliding heads (202) are adjusted at equal distances through the cross arm (204), so that the multiple protective layer control ends (205) are accurately adjusted in position for use, and then the bolts are re-tightened; S3, after the lower layer of steel bars of the floor slab are stacked, the clamp is installed, the lower layer of steel bars are fixed on the clamp, and at the same time, the contact plate (303) is in anti-slip contact with the installation position, and the spring continuously pushes the moving plate (306) to move, so that the cross bar moves inside the inclined slide groove, and the bottom structure (308) moves obliquely; S4, if the protection layer control end (205) cannot meet the protection layer control requirements of the lower mesh, control the three protection layer control ends (205) to rotate and make adjustments; S5, installing the upper steel mesh, tying the steel bars to the corresponding protective layer control end (205) according to the design spacing requirements, when the upper support beam (2) is used, the moving rod assembly (103) and the fixed rod (102) are pulled up, so that the sliding assembly (1) can slide and move laterally, after the displacement, the fixed rod (102) is inserted into the inside of the circular hole, and when the sliding assembly (1) moves, it drives the flip rod (105) and the rotating head assembly (106) to flip, pushing the linkage rod (107) to move up and down, so that the telescopic assembly (108) can be telescoped up and down, and the spacing is adjusted so that the upper protective layer meets the requirements; S6. After the floor slab concrete is poured and finally set, remove the fixture and reuse it in the next location.

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