Prefabricated stair positioning and supporting device

Abstract

The utility model discloses a prefabricated stair positioning and supporting device which comprises a lower stair and an upper stair, a positioning and supporting assembly is installed between the lower stair and the upper stair, the positioning and supporting assembly comprises two jacks, supporting rods are fixedly installed at the output ends of the jacks, and supporting top blocks are installed at the top ends of the supporting rods. The jack is placed on a lower stair, an inclined supporting face is arranged on the supporting top block and tightly attached to the bottom wall of an upper stair, clamping plates are symmetrically arranged at the two ends of the supporting top block, and a movable groove is formed in the supporting top block. In the working process, the inclined supporting face of the arranged supporting top block is tightly attached to the bottom wall of the upper stair, the two ends of the supporting top block are arranged on the two sides of the upper stair respectively, and after the double-thread screw is rotated through the motor, the two clamping plates are driven to be close to each other, so that the two clamping plates are tightly attached to the two sides of the upper stair, and the positioning and supporting effect is improved; and meanwhile, stairs with different widths can be conveniently positioned.

Description

Technical Field

[0001] The utility model belongs to the technical field of precast stairs, and particularly relates to a positioning and supporting device for precast stairs. Background Technique

[0002] According to the patent document with the authorization announcement number of "CN219732893U" and the invention name of "a supporting and limiting device for precast stairs", it is recorded in the specification that the number of cross bars is at least four, and the vertical bars are connected to the cross bars through buckles. By setting up the support frame, it is convenient to support the upper precast stairs before pouring the concrete of the platform slab, so that the upper precast stairs can be lapped on the platform slab, which is convenient to control the elevation between the platform slab and the upper precast stairs during the subsequent pouring of the platform slab concrete, and improves the construction quality; by setting up the limiting parts, it is convenient to fix the upper precast stairs on the support frame. By setting up the U-shaped parts and L-shaped clamping parts, it is convenient to clamp the lower surface and the upper surface of the upper precast stairs respectively, and by setting the L-shaped clamping part to clamp at the concave corner of the upper surface of the upper precast stairs, the firmness of the clamping is improved, and problems such as inclination and displacement of the upper precast stairs are avoided. The use effect is good and the practicability is strong, but there are still the following defects:

[0003] The U-shaped parts and the L-shaped clamping parts are not convenient to rotate and adjust the direction, so it is not convenient to clamp the L-shaped clamping parts at the concave corners of the upper surfaces of different upper precast stairs. Content of the Utility Model

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a positioning and supporting device for precast stairs, which effectively solves the problem that the U-shaped parts and the L-shaped clamping parts are not convenient to rotate and adjust the direction, affecting the installation.

[0005] To achieve the above object, the utility model provides the following technical solution: a positioning and supporting device for precast stairs, including a lower staircase and an upper staircase, and a positioning and supporting component is installed between the lower staircase and the upper staircase;

[0006] The positioning and supporting component includes two jacks. A support rod is fixedly installed on the output end of the jack. A support top block is installed at the top end of the support rod. The jacks are placed on the lower staircase. An inclined support surface is arranged on the support top block, and the inclined support surface is in close contact with the bottom wall of the upper staircase.

[0007] Preferably, clamping plates are symmetrically arranged at both ends of the support top block. An activity groove is opened inside the support top block. Two activity plates are slidably installed inside the activity groove. Connecting rods are installed on the sides of the two activity plates away from each other. The connecting rods penetrate to the outside of the support top block, and the two connecting rods are respectively fixedly connected to the two clamping plates.

[0008] Preferably, a side box is installed on one side of the movable slot, the movable plate is slidably connected to the side box, a double-headed screw is rotatably installed inside the side box, two movable plates are respectively threadedly connected to two threaded grooves with opposite opening directions on the double-headed screw, one end of the double-headed screw is fixedly connected to the output shaft of the motor, the motor is fixedly installed on the side box, and the rotation of the double-headed screw drives the two clamping plates to approach each other to clamp both sides of the staircase tightly.

[0009] Preferably, rod grooves are formed in the clamping plates, a cross bar is arranged between the two clamping plates, end screws are symmetrically installed at both ends of the cross bar, the end screws are inserted into the rod grooves, nuts are threadedly installed on the end screws, and the two nuts are respectively in contact with the sides of the two clamping plates away from each other.

[0010] Preferably, guiding grooves are symmetrically formed in the cross bar, guiding rods are movably installed inside the guiding grooves, one ends of the two guiding rods are fixedly connected to a positioning block, end plates are installed at the other ends of the guiding rods, springs are symmetrically installed on the side of the end plate close to the cross bar, and the springs are fixedly connected to the cross bar.

[0011] Preferably, a screw barrel is installed on the cross bar, the screw barrel is located between the two guiding grooves, a pushing screw is threadedly installed inside the screw barrel, and one end of the pushing screw is in contact with the positioning block.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] During the work, the inclined supporting surface of the supporting top block is closely attached to the bottom wall of the staircase, and both ends of the supporting top block are respectively arranged on both sides of the staircase. After the double-headed screw is rotated by the motor, the two clamping plates are driven to approach each other, so that the two clamping plates are closely attached to both sides of the staircase, improving the positioning and supporting effect, and at the same time facilitating the positioning of staircases with different widths.

[0014] During the work, when the two clamping plates approach each other, the end screws at both ends of the cross bar are respectively inserted into the rod grooves on the two clamping plates, and then the nuts are tightened and fixed. Since the end screws are rotatably connected to the rod grooves, it is convenient to adjust the positioning block to correspond to the stair corner of the staircase, and by turning the pushing screw, the positioning block is pushed into the stair corner, which is convenient for positioning the staircase. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.

[0016] In the drawings:

[0017] Figure 1 is a schematic structural diagram of a positioning and supporting device for a precast staircase of the present utility model;

[0018] Figure 2 Schematic structural diagram of the positioning and supporting component of the present utility model;

[0019] Figure 3 Schematic structural diagram of the supporting top block of the present utility model;

[0020] Figure 4 Schematic structural diagram of the cross bar of the present utility model.

[0021] In the figure: 1, lower staircase; 2, upper staircase; 3, positioning and supporting component; 301, jack; 302, support rod; 303, supporting top block; 304, movable groove; 305, movable plate; 306, connecting rod; 307, clamping plate; 308, side box; 309, double-headed screw; 310, motor; 311, rod groove; 312, cross bar; 313, end screw; 314, nut; 315, screw barrel; 316, pushing screw; 317, guiding groove; 318, guiding rod; 319, positioning block; 320, end plate; 321, spring. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1 is given by Figures 1-4 The present utility model relates to a precast staircase positioning and supporting device, including a lower staircase 1 and an upper staircase 2, and a positioning and supporting component 3 is installed between the lower staircase 1 and the upper staircase 2;

[0024] The positioning and supporting assembly 3 includes two jacks 301. A support rod 302 is fixedly installed on the output end of the jack 301. A support top block 303 is installed at the top of the support rod 302. The jack 301 is placed on the lower staircase 1. An inclined support surface is provided on the support top block 303, and the inclined support surface is in close contact with the bottom wall of the upper staircase 2. Clamping plates 307 are symmetrically arranged at both ends of the support top block 303. An activity groove 304 is formed inside the support top block 303. Two activity plates 305 are slidably installed inside the activity groove 304. Connecting rods 306 are installed on the sides of the two activity plates 305 away from each other. The connecting rods 306 penetrate to the outside of the support top block 303, and the two connecting rods 306 are respectively fixedly connected to the two clamping plates 307. A side box 308 is installed on one side of the activity groove 304. The activity plate 305 is slidably connected to the side box 308. A double-headed screw rod 309 is rotatably installed inside the side box 308. The two activity plates 305 are respectively threadedly connected to two thread grooves with opposite opening directions on the double-headed screw rod 309. One end of the double-headed screw rod 309 is fixedly connected to the output shaft of the motor 310. The motor 310 is fixedly installed on the side box 308. The rotation of the double-headed screw rod 309 drives the two clamping plates 307 to approach each other to tightly clamp both sides of the upper staircase 2. The inclined support surface of the support top block 303 is in close contact with the bottom wall of the upper staircase 2, and both ends of the support top block 303 are respectively arranged on both sides of the upper staircase 2. After the motor 310 rotates the double-headed screw rod 309, it drives the two clamping plates 307 to approach each other, so that the two clamping plates 307 are in close contact with both sides of the upper staircase 2, improving the positioning and supporting effect, and at the same time facilitating the positioning of staircases with different widths.

[0025] The clamping plate 307 is provided with a rod groove 311. A cross bar 312 is arranged between the two clamping plates 307. End screws 313 are symmetrically installed at both ends of the cross bar 312. The end screws 313 are inserted into the rod groove 311. Nuts 314 are threadedly installed on the end screws 313. The two nuts 314 are respectively in contact with the sides of the two clamping plates 307 away from each other. Guide grooves 317 are symmetrically formed on the cross bar 312. Guide rods 318 are movably installed inside the guide grooves 317. One ends of the two guide rods 318 are fixedly connected to a positioning block 319. An end plate 320 is installed at the other end of the guide rod 318. Springs 321 are symmetrically installed on the side of the end plate 320 close to the cross bar 312. The springs 321 are fixedly connected to the cross bar 312. A screw cylinder 315 is installed on the cross bar 312. The screw cylinder 315 is located between the two guide grooves 317. A push screw 316 is threadedly installed inside the screw cylinder 315. One end of the push screw 316 is in contact with the positioning block 319. When the two clamping plates 307 approach each other, the end screws 313 at both ends of the cross bar 312 are respectively inserted into the rod grooves 311 on the two clamping plates 307. Then the nuts 314 are tightened and fixed. Since the end screw 313 is rotatably connected to the rod groove 311, it is convenient to adjust the positioning block 319 to correspond to the stair corner of the upper staircase 2. Turning the push screw 316 to push the positioning block 319 into the stair corner facilitates the positioning of the staircase.

[0026] Working principle: During operation, first, the jack 301 is fixedly arranged on the lower staircase 1. The jack 301 is activated, so that the inclined support surface on the support top block 303 contacts the bottom wall of the upper staircase 2, thereby supporting the upper staircase 2. At the same time, the two clamping plates 307 are respectively located on both sides of the upper staircase 2;

[0027] The cross bar 312 is arranged between the two clamping plates 307. The motor 310 is activated, so that the double-headed screw 309 rotates, causing the two clamping plates 307 to approach each other and contact the side wall of the upper staircase 2, and the end screws 313 at both ends of the cross bar 312 are inserted into the rod grooves 311 on the two clamping plates 307;

[0028] The cross bar 312 is rotated so that the positioning block 319 faces the stair corner on the upper staircase 2. The push screw 316 is turned. Since the push screw 316 is threadedly connected to the screw cylinder 315, the push screw 316 moves towards the positioning block 319, pushing the positioning block 319 to closely adhere to the stair corner, thereby further positioning and supporting the staircase.

Claims

1. A prefabricated stair positioning support device, comprising a descending staircase (1) and an ascending staircase (2), characterized in that: A positioning support assembly (3) is installed between the descending staircase (1) and the ascending staircase (2); The positioning support assembly (3) comprises two jacks (301), a support rod (302) is fixedly mounted on the output end of the jack (301), a support top block (303) is mounted on the top end of the support rod (302), the jack (301) is placed on the lower staircase (1), and an inclined support surface is arranged on the support top block (303), and the inclined support surface is in close contact with the bottom wall of the upper staircase (2).

2. A prefabricated stair positioning support device according to claim 1, characterized in that: Clamps (307) are symmetrically arranged at both ends of the supporting top block (303), a movable groove (304) is opened inside the supporting top block (303), two movable plates (305) are slidably installed inside the movable groove (304), and connecting rods (306) are installed on the sides of the two movable plates (305) away from each other, and the connecting rods (306) penetrate to the outside of the supporting top block (303), and the two connecting rods (306) are fixedly connected to the two clamps (307) respectively.

3. A prefabricated stair positioning support device according to claim 2, characterized in that: A side box (308) is installed on one side of the movable groove (304), and the movable plate (305) is slidably connected to the side box (308). A double-headed screw (309) is rotatably installed inside the side box (308). The two movable plates (305) are respectively threadedly connected to two thread grooves on the double-headed screw (309) with opposite directions. One end of the double-headed screw (309) is fixedly connected to the output shaft of the motor (310). The motor (310) is fixedly installed on the side box (308). The double-headed screw (309) rotates to drive the two clamping plates (307) to approach each other and press the two sides of the upper staircase (2) tightly.

4. A prefabricated stair positioning support device according to claim 2, characterized in that: The clamping plate (307) is provided with a rod groove (311), a cross bar (312) is provided between the two clamping plates (307), end screw rods (313) are symmetrically installed at both ends of the cross bar (312), the end screw rods (313) are inserted into the rod groove (311), nuts (314) are threadedly installed on the end screw rods (313), and the two nuts (314) are respectively in contact with the sides of the two clamping plates (307) that are away from each other.

5. A prefabricated stair positioning support device according to claim 4, characterized in that: The cross bar (312) is symmetrically provided with guide grooves (317), and guide rods (318) are movably installed inside the guide grooves (317). One end of each of the two guide rods (318) is fixedly connected to a positioning block (319), and an end plate (320) is installed at the other end of the guide rod (318). A spring (321) is symmetrically installed on one side of the end plate (320) close to the cross bar (312), and the spring (321) is fixedly connected to the cross bar (312).

6. A prefabricated stair positioning support device according to claim 5, characterized in that: A screw barrel (315) is installed on the cross bar (312), and the screw barrel (315) is located between the two guide grooves (317). A pushing screw rod (316) is installed on the internal thread of the screw barrel (315), and one end of the pushing screw rod (316) is in contact with the positioning block (319).

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