Concrete pouring floor thickness measurer

Abstract

A concrete pouring floor thickness measurer comprises a measuring rod, a floating plate and a driving rod, measuring scales are arranged on the outer side face of the measuring rod, a sleeving groove matched with the measuring rod in size is formed in the middle of the floating plate, a coaxial inserting groove is formed in the measuring rod, and the floating plate is arranged on the outer side of the measuring rod in a sleeving mode through the sleeving groove. A limiting device is arranged between the floating plate and the measuring rod to prevent the floating plate from circumferentially rotating after the floating plate sleeves the measuring rod, and a first magnet is embedded in the inner wall of one side of the sleeving groove of the floating plate; the driving rod is inserted in the slot of the measuring rod, a second magnet matched with the first magnet is embedded in the outer side of the lower end of the driving rod, the second magnet is only arranged on one side of the driving rod, and the outer magnetic pole of the second magnet is different from the inner magnetic pole of the first magnet. On one hand, the device ensures that the scales accurately reflect the floor pouring height, and on the other hand, subsequent reading is facilitated, and the measurement precision is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of detection devices for building construction, and in particular relates to a concrete pouring floor slab thickness measuring device. Background Art

[0002] During the pouring process of reinforced concrete slabs, the thickness of the slabs needs to be measured before the concrete begins to set, so as to check the areas where the thickness of the slabs exceeds the allowable deviation range specified in the specifications and make adjustments to them, so as to control the thickness of the entire slab to be within the allowable deviation range.

[0003] As attached Fig.11 As shown, this is a commonly used measuring device in the prior art, which consists of a measuring rod 1 and a floating plate 2. The side of the measuring rod 1 has a measuring scale 11. When measuring, the measuring rod 1 is inserted into the concrete until the lower end abuts against the template, and then the floating plate 2 is inserted into the measuring rod 1 from the upper end of the measuring rod 1, and the floating plate 2 is allowed to fall on the concrete under the action of gravity. The floating plate 2 will float on the concrete surface due to the buoyancy, and the thickness of the floor slab can be read from the scale corresponding to the upper end of the floating plate 2.

[0004] Since there may be some small debris on the concrete surface, these small debris protrude to the upper surface of the concrete layer, causing the surface to be uneven. Therefore, when the lower surface of the floating plate 2 contacts the upper surface of the concrete, the lower surface of the floating plate 2 will be blocked by the small debris, resulting in the floating plate 2 and the concrete surface cannot be completely fitted, which will cause the measured thickness to be greater than the actual thickness. Therefore, a concrete cast floor thickness measuring device that can solve the above technical problems is urgently needed. Summary of the invention

[0005] The purpose of the present invention is to provide a concrete cast floor slab thickness measuring device to solve the problems existing in the background technology.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A concrete cast floor slab thickness measuring device comprises a measuring rod, a floating plate and a driving rod, wherein the outer side surface of the measuring rod is provided with a measuring scale, the middle part of the floating plate is provided with a sleeve groove matching the size of the measuring rod, a coaxially arranged slot is provided in the measuring rod, the floating plate is sleeved on the outer side of the measuring rod through the sleeve groove, and a limit device is provided between the floating plate and the measuring rod to prevent the floating plate from circumferential rotation after being sleeved on the measuring rod, a first magnet is embedded on the inner wall of one side of the sleeve groove of the floating plate; the driving rod is inserted into the slot of the measuring rod, a second magnet matching the first magnet is embedded on the outer side of the lower end of the driving rod, the second magnet is also only provided on one side of the driving rod, and the outer magnetic pole of the second magnet is different from the inner magnetic pole of the first magnet.

[0008] In this embodiment, the measuring rod includes a first rod body, which is a cylindrical structure. A slot matching the size of the driving rod is provided in the first rod body along the axial direction. The slot is a cylindrical shape concentrically arranged with the first rod body, and the driving rod is a cylindrical shape matching the slot. After being inserted into the slot, the driving rod of this shape can remain relatively concentric with the slot, so that the driving rod can rotate relatively smoothly.

[0009] In this embodiment, the limiting device includes a limiting groove in the floating plate sleeve groove and a first limiting piece that matches the size of the limiting groove. The first limiting piece is fixed to the outside of the first rod body and its length direction is parallel to the axis of the first rod body. The sleeve groove includes a cylindrical groove and a limiting groove. The limiting groove is connected to the cylindrical groove. The cylindrical groove is used to accommodate the first rod body, and the limiting groove is used to accommodate the first limiting piece. When the floating plate is sleeved with the measuring rod through the above-mentioned sleeve groove, the first limiting piece can be located in the limiting groove to limit the circumferential rotation of the floating plate relative to the measuring rod.

[0010] In this embodiment, a spike is fixed at the bottom of the measuring rod for convenient insertion into concrete, so that when the measuring rod is inserted into concrete, the tip of the lower end of the spike can smoothly separate the concrete, so that the measuring rod can be smoothly inserted into the concrete.

[0011] In this embodiment, a locking device for locking the position of the floating plate is also included, the locking device includes an elastic locking tongue, a through groove arranged along the axial direction is opened on the side of the first rod body away from the first limiting member, the through groove connects the slot with the outside, the driving rod is a hollow rod, and a radial sliding groove arranged along the axial direction is opened on the outer side of the driving rod, the radial sliding groove is connected to the inner cavity of the driving rod, the through groove and the radial sliding groove are matched with the size of the elastic locking tongue, the second magnet on the driving rod is fixed on the side away from the radial sliding groove, and the first magnet is embedded in the inner wall of the cylindrical groove and away from the limiting groove;

[0012] An elastic locking tongue is slidably connected in the radial slide groove, and the elastic locking tongue moves radially along the driving rod in the radial slide groove. One end of the elastic locking tongue is connected to the inner wall of the inner cavity of the driving rod through an elastic member. In the locked state, under the elastic force of the elastic member, the elastic locking tongue can pass through the radial slide groove and extend from the through groove. In the contracted state, the elastic member contracts and the elastic locking tongue is received in the radial slide groove.

[0013] In this embodiment, a slide is slidably installed in the inner cavity of the drive rod, and the elastic lock tongue is slidably connected to the slide through the slide rod. The elastic member is a coil spring, which is sleeved on the slide rod. One end of the coil spring is fixed on the elastic lock tongue, and the other end is fixed on the slide.

[0014] In this embodiment, the vertical edge of one end of the outer side of the elastic locking tongue is chamfered to form a guiding bevel. When the driving rod is rotated, the guiding bevel is used to facilitate the disengagement of the elastic locking tongue from the through slot. Specifically, when it is necessary to release the floating plate, the driving rod can be twisted to rotate rightward relative to the measuring rod. When the guiding bevel abuts against the vertical edge of the right end of the inner side of the radial slide groove, the elastic locking tongue will overcome the elastic force of the elastic member under the guiding action of the guiding bevel to force the elastic locking tongue to slide inward, so that the elastic locking tongue can withdraw from the through slot and return to abutting against the inner wall of the slot, so that the floating plate can be released for subsequent measurement.

[0015] In this embodiment, an elastic cover for sealing the through slot is further provided on the outer side of the first rod. The elastic cover can seal the through slot to prevent concrete from flowing into the through slot and affecting the measuring device. With such a configuration, when the elastic locking tongue is inserted into the through slot and abuts against the inner wall of the cylindrical slot, it actually pushes the elastic cover to abut against the inner wall of the cylindrical slot, and the elastic cover can be elastically deformed so as to bulge outward and abut against the inner wall of the cylindrical slot.

[0016] In this embodiment, the elastic cover is made of rubber material. This material has good elasticity, and also has good corrosion resistance and water-proof performance. In addition, the elastic cover can also be used as a friction member to increase the friction coefficient and is located between the cylindrical groove and the elastic locking tongue to improve the fixing effect of the floating plate.

[0017] In this embodiment, a receiving groove for receiving the elastic cover is provided on the side of the first rod body, and the elastic cover is fixed in the receiving groove. Such a configuration can keep the outer side of the first rod body relatively flat so that the floating plate can slide smoothly.

[0018] With the above structure, this device has significant advantages over the prior art. On the one hand, when there are small debris on the concrete surface that lifts up the floating plate, the driving rod can be used to drive the floating plate to vibrate, so that the small debris sinks into the concrete, and the upper surface of the concrete remains flat, thereby ensuring that the scale corresponding to the upper end of the floating plate can more accurately reflect the pouring height of the floor slab, that is, the thickness of the floor slab. On the other hand, after the measurement is completed, the floating plate can be fixed to the outside of the driving rod to maintain the measurement state, which is convenient for subsequent readings, and the floating plate can be lifted to the level of the surveyor's line of sight so that the surveyor can read accurately, thereby improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure enlargement at the center A;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure enlarged at B in the middle;

[0023] Figure 5 It is a structural schematic diagram of the measuring rod of the present invention;

[0024] Figure 6 for Figure 5 A schematic diagram of the structure enlarged at C in the middle;

[0025] Figure 7 It is a structural schematic diagram of the driving rod of the present invention;

[0026] Figure 8 for Figure 7 A schematic diagram of the structure at D in the middle is enlarged;

[0027] Fig. 9 It is a schematic diagram of the connection between the elastic locking tongue, the sliding rod, the elastic member and the sliding frame of the present invention;

[0028] Fig.10 It is a structural schematic diagram of the floating plate of the present invention;

[0029] Fig.11 It is a schematic diagram of the structure of a measuring device in the prior art.

[0030] In the accompanying drawings: 1. measuring rod; 11. measuring scale; 12. slot; 13. first rod body; 131. through slot; 132. elastic covering member; 133. accommodating slot; 14. first limiting member; 15. spike; 2. floating plate; 21. sleeve slot; 211. cylindrical slot; 212. limiting slot; 22. first magnet; 3. driving rod; 31. second magnet; 32. radial slide slot; 33. elastic locking tongue; 331. guide ramp; 332. slide rod; 34. elastic member; 35. slide bracket. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] like Figure 1-10As shown, the concrete cast floor thickness measuring device of this embodiment includes a measuring rod 1, a floating plate 2 and a driving rod 3. The outer side surface of the measuring rod 1 is provided with a measuring scale 11. The middle part of the floating plate 2 is provided with a sleeve groove 21 that matches the size of the measuring rod 1. A coaxially arranged slot 12 is provided in the measuring rod 1. The floating plate 2 is sleeved on the outer side of the measuring rod 1 through the sleeve groove 21, and a limit device is provided between the floating plate 2 and the measuring rod 1 to prevent the floating plate 2 from circumferential rotation after being sleeved on the measuring rod 1. The floating plate 2 is embedded with a first magnet 22 on the inner wall of one side of the sleeve groove 21; the driving rod 3 is inserted into the slot 12 of the measuring rod 1, and a second magnet 31 matching the first magnet 22 is embedded on the outer side of the lower end of the driving rod 3. The second magnet 31 is also only arranged on one side of the driving rod 3, and the outer magnetic pole of the second magnet 31 is different from the inner magnetic pole of the first magnet 22.

[0033] When in use, insert the measuring rod 1 into the concrete until the lower end abuts against the formwork, and then insert the floating plate 2 into the measuring rod 1 from the upper end of the measuring rod 1 through the sleeve groove 21. After inserting, release the floating plate 2, and it will fall on the concrete under the action of gravity. In this way, the floating plate 2 will float on the concrete surface due to the buoyancy. At this time, the pouring height of the floor slab, that is, the thickness of the floor slab, can be read through the measuring scale 11 corresponding to the upper end of the floating plate 2.

[0034] During the above measurement process, if there are small debris on the concrete surface that lifts up the floating plate 2, the floating plate 2 will float on the concrete surface under the action of buoyancy. At this time, the driving rod 3 can be inserted into the slot 12 from top to bottom. When inserting, the second magnet 31 and the first magnet 22 should be on the same side. When it drops close to the first magnet 22, the first magnet 22 and the second magnet 31 will produce magnetic adsorption across the measuring rod 1, that is, the floating plate 2 will be close to the outside of the measuring rod 1. At this time, the driving rod 3 can be lifted up and down relative to the measuring rod 1 in a cycle, so that the floating plate 2 can be driven to oscillate up and down relative to the measuring rod 1, and the floating plate 2 is kept in contact with the concrete during oscillation. When the floating plate 2 is touched, the concrete will be vibrated, which can enhance the fluidity of the concrete and make the protruding small debris sink into the concrete, so that the upper surface of the concrete can be kept flat. After the vibration is completed, the driving rod 3 is rotated 180 degrees relative to the measuring rod 1. Since the floating plate 2 cannot rotate circumferentially relative to the measuring rod 1, the second magnet 31 will be away from the first magnet 22 during the rotation of the driving rod 3, that is, the magnetic attraction between the two will dissipate, so that the floating plate 2 will resume its free activity state, and the floating plate 2 can naturally float on the concrete surface. At this time, the scale corresponding to the upper end of the floating plate 2 is a more accurate floor slab casting height, that is, the thickness of the floor slab.

[0035] Furthermore, the measuring rod 1 includes a first rod body 13, which is a cylindrical structure, and a slot 12 matching the size of the driving rod 3 is axially opened in the first rod body 13, and the slot 12 is a cylindrical shape concentrically arranged with the first rod body 13, and the driving rod 3 is a cylindrical shape matching the slot 12. After being inserted into the slot 12, the driving rod 3 of this shape can remain relatively concentric with the slot 12, so that the driving rod 3 can rotate relatively smoothly.

[0036] The limiting device includes a first limiting member 14 whose size matches the limiting groove 212. The first limiting member 14 is fixed to the outside of the first rod body 13 and its length direction is parallel to the axis of the first rod body 13. The sleeve groove 21 includes a cylindrical groove 211 and a limiting groove 212. The cylindrical groove 211 is used to accommodate the first rod body 13. The limiting groove 212 is connected to the cylindrical groove 211, and the limiting groove 212 is used to accommodate the first limiting member 14. When the floating plate 2 is sleeved with the measuring rod 1 through the sleeve groove 21, the first limiting member 14 can be located in the limiting groove 212 to limit the circumferential rotation of the floating plate 2 relative to the measuring rod 1.

[0037] like Figure 2 As shown, a spike 15 is fixed at the bottom of the measuring rod 1 for easy insertion into concrete, so that when the measuring rod 1 is inserted into the concrete, the tip of the lower end of the spike 15 can smoothly separate the concrete, so that the measuring rod 1 can be smoothly inserted into the concrete.

[0038] like Figure 5 , 6 As shown, it also includes a locking device for locking the position of the floating plate 2, the locking device includes an elastic locking tongue 33, and the first rod body 13 is provided with an axially arranged through groove 131 on a side away from the first limiting member 14, and the through groove 131 connects the slot 12 with the outside, as shown in FIG. Figure 4 , 8 As shown, the driving rod 3 is a hollow rod, and a radial groove 32 arranged along the axial direction is provided on the outer side of the driving rod 3, and the radial groove 32 is communicated with the inner cavity of the driving rod 3, and the through groove 131 and the radial groove 32 are matched with the elastic locking tongue 33 in size, and the second magnet 31 on the driving rod 3 is fixed on the side away from the radial groove 32, and the first magnet 22 is embedded in the inner wall of the cylindrical groove 211 and away from the limiting groove 212;

[0039] An elastic locking tongue 33 is slidably connected in the radial slot 32. The elastic locking tongue 33 moves radially along the driving rod 3 in the radial slot 32. One end of the elastic locking tongue 33 is connected to the inner wall of the inner cavity of the driving rod 3 through an elastic member 34. In the locked state, under the elastic force of the elastic member 34, the elastic locking tongue 33 can pass through the radial slot 32 and extend from the through slot 131. In the contracted state, the elastic member 34 contracts and the elastic locking tongue 33 is stored in the radial slot 32.

[0040] like Fig. 9As shown, specifically, a slide 35 is slidably installed in the inner cavity of the driving rod 3, and the elastic lock tongue 33 is slidably connected to the slide 35 through the slide rod 332. The elastic member 34 is a coil spring, and the coil spring is sleeved on the slide rod 332. One end of the coil spring is fixed on the elastic lock tongue 33, and the other end is fixed on the slide 35. The coil spring cooperates with the slide 35 to apply an elastic force to the elastic lock tongue 33 to move outward.

[0041] Based on the above structure, after the driving rod 3 is inserted into the slot 12 of the measuring rod 1, it has two states: a locked state and a contracted state. In the contracted state, the radial slot 32 and the through slot 131 do not overlap, and the elastic member 34 is compressed under the extrusion of the inner wall of the slot 12. The elastic locking tongue 33 extends out of the radial slot 32 under the push of the elastic member 34 and is slidably connected with the inner wall of the slot 12; in the locked state, the driving rod 3 is rotated so that the radial slot 32 overlaps with the through slot 131. The elastic locking tongue 33 will pass through the radial slot 32 and extend from the through slot 131 under the elastic force of the elastic member 34, and abut against the inner wall of the cylindrical groove 211 of the floating plate 2, thereby limiting the axial sliding of the floating plate 2.

[0042] When the driving rod 3 is inserted into the slot 12, the elastic locking tongue 33 should be pressed inwardly to overcome the elastic force of the elastic member 34 so that the elastic locking tongue 33 is contracted in the radial sliding groove 32, and then the driving rod 3 is inserted into the slot 12. After the driving rod 3 enters the slot 12, the elastic locking tongue 33 moves outward under the elastic force of the elastic member 34. Since the second magnet 31 needs to be aligned with the first magnet 22 when the driving rod 3 drives the floating plate 2 to oscillate, that is, the second magnet 31 needs to be opposite to the first magnet 22, at this time, the driving rod 3 is rotated so that the radial sliding groove 32 is facing away from the through groove 131, that is, the two will not overlap. In this state, the first magnet 22 and the second magnet 31 are on the same side, so that when the driving rod 3 moves axially, the first magnet 22 and the second magnet 31 can attract each other, so that the driving rod 3 drives the floating plate 2 to oscillate.

[0043] After the driving rod 3 drives the floating plate 2 to oscillate, the driving rod 3 is rotated 90 degrees, so that the first magnet 22 is separated from the second magnet 31. In this state, the floating plate 2 will be in a free activity state, and the corresponding scale of the floating plate 2 at this time is a more accurate floor slab casting height, that is, the thickness of the floor slab; then, in the state, the driving rod 3 is rotated 90 degrees again, so that the radial slide groove 32 is aligned with the through groove 131. At this time, the elastic locking tongue 33 will pass through the radial slide groove 32 and extend from the through groove 131 under the elastic force of the elastic member 34, and abut against the inner wall of the cylindrical groove 211 of the floating plate 2, thereby limiting the axial sliding of the floating plate 2, that is, fixing the floating plate 2 on the outside of the driving rod 3. In this way, after the measuring rod 1 is taken out of the concrete, the measuring instrument will maintain the measuring state, so that it is convenient to lift the floating plate 2 to the level of the surveyor's line of sight, so that the surveyor can read accurately, thereby improving the measurement accuracy.

[0044] Furthermore, the vertical edge of the right end of the outer side of the elastic locking tongue 33 is chamfered to form a guiding bevel 331. When the driving rod 3 is rotated, the guiding bevel 331 is used to facilitate the elastic locking tongue 33 to be disengaged from the through slot 131. Specifically, when it is necessary to release the floating plate 2, the driving rod 3 can be twisted to rotate rightward relative to the measuring rod 1. When the guiding bevel 331 abuts against the vertical edge of the right end of the inner side of the radial sliding groove 32, the elastic locking tongue 33 will overcome the elastic force of the elastic member 34 under the guiding action of the guiding bevel 331 to force the elastic locking tongue 33 to slide inward, so that the elastic locking tongue 33 can withdraw from the through slot 131 and return to abutting against the inner wall of the slot 12, so that the floating plate 2 can be released for subsequent measurement.

[0045] Furthermore, an elastic cover 132 for sealing the through groove 131 is also provided on the outer side of the first rod body 13. The elastic cover 132 can seal the through groove 131 to prevent concrete from flowing into the through groove 131 and affecting the measuring device. With such a configuration, when the elastic locking tongue 33 is inserted into the through groove 131 and abuts against the inner wall of the cylindrical groove 211, the elastic cover 132 is actually pushed to abut against the inner wall of the cylindrical groove 211, and the elastic cover 132 can be elastically deformed so as to bulge outwards and abut against the inner wall of the cylindrical groove 211.

[0046] It is worth mentioning that in this embodiment, the elastic cover 132 is made of rubber material, which has good elasticity, corrosion resistance and water-proof performance. In addition, the elastic cover 132 can also be used as a friction member to increase the friction coefficient and is located between the cylindrical groove 211 and the elastic locking tongue 33 to improve the fixing effect of the floating plate 2.

[0047] Furthermore, a receiving groove 133 for receiving the elastic cover 132 is formed on the side of the first rod 13, and the elastic cover 132 is fixed in the receiving groove 133. This arrangement allows the outer side of the first rod 13 to remain relatively flat, so that the floating plate 2 can slide smoothly.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A concrete pouring floor slab thickness measuring device, characterized in that: It includes a measuring rod, a floating plate and a driving rod. The outer side of the measuring rod is provided with a measuring scale. The middle part of the floating plate is provided with a sleeve groove matching the size of the measuring rod. A coaxially arranged slot is provided in the measuring rod. The floating plate is sleeved on the outer side of the measuring rod through the sleeve groove. A limiting device is provided between the floating plate and the measuring rod to prevent the circumferential rotation of the floating plate after being sleeved on the measuring rod. A first magnet is embedded on the inner wall of one side of the sleeve groove of the floating plate; the driving rod is inserted into the slot of the measuring rod, and a second magnet matching the first magnet is embedded on the outer side of the lower end of the driving rod. The second magnet is also only arranged on one side of the driving rod, and the outer magnetic pole of the second magnet is different from the inner magnetic pole of the first magnet.

2. A concrete slab thickness measuring device according to claim 1, characterized in that: The measuring rod comprises a first rod body, which is a cylindrical structure. A slot matching the size of the driving rod is axially provided in the first rod body. The slot is a cylinder concentrically arranged with the first rod body, and the driving rod is a cylinder matching the slot.

3. A concrete slab thickness measuring device according to claim 1, characterized in that: The limiting device includes a limiting groove in the floating plate sleeve groove and a first limiting piece matching the size of the limiting groove. The first limiting piece is fixed on the outside of the first rod body and its length direction is parallel to the axis of the first rod body. The sleeve groove includes a cylindrical groove and a limiting groove. The limiting groove is connected to the cylindrical groove. The cylindrical groove is used to accommodate the first rod body, and the limiting groove is used to accommodate the first limiting piece.

4. A concrete slab thickness measuring device according to claim 1, characterized in that: A spike is fixed at the bottom of the measuring rod for easy insertion into concrete.

5. A concrete slab thickness measuring device according to any one of claims 1 to 4, characterized in that: The locking device is also included for locking the position of the floating plate, the locking device includes an elastic locking tongue, a through groove arranged along the axial direction is opened on the side of the first rod body away from the first limiting member, the through groove connects the slot with the outside, the driving rod is a hollow rod, and a radial sliding groove arranged along the axial direction is opened on the outer side of the driving rod, the radial sliding groove is connected with the inner cavity of the driving rod, the through groove and the radial sliding groove are matched with the size of the elastic locking tongue, the second magnet on the driving rod is fixed on the side away from the radial sliding groove, and the first magnet is embedded in the inner wall of the cylindrical groove and away from the limiting groove; An elastic locking tongue is slidably connected in the radial slide groove, and the elastic locking tongue moves radially along the driving rod in the radial slide groove. One end of the elastic locking tongue is connected to the inner wall of the inner cavity of the driving rod through an elastic member. In the locked state, under the elastic force of the elastic member, the elastic locking tongue can pass through the radial slide groove and extend from the through groove. In the contracted state, the elastic member contracts and the elastic locking tongue is received in the radial slide groove.

6. A concrete pouring floor slab thickness measuring device according to claim 5, characterized in that: A slide is slidably installed in the inner cavity of the driving rod, the elastic lock tongue is slidably connected with the slide through the slide rod, the elastic member is a coil spring, the coil spring is sleeved on the slide rod, one end of the coil spring is fixed on the elastic lock tongue, and the other end is fixed on the slide.

7. A concrete slab thickness measuring device according to claim 5, characterized in that: The vertical edge of one end of the outer side of the elastic locking tongue is chamfered to form a guiding inclined surface.

8. The concrete pouring floor slab thickness measuring device according to claim 5, characterized in that: The outer side of the first rod body is also provided with an elastic covering member for sealing the through groove.

9. A concrete slab thickness measuring device according to claim 8, characterized in that: The elastic covering piece is made of rubber material.

10. The concrete pouring floor slab thickness measuring device according to claim 8, characterized in that: A receiving groove for receiving the elastic cover is formed on the side surface of the first rod body, and the elastic cover is fixed in the receiving groove.

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