Protective assembly for concrete prefabricated stairs

Abstract

The utility model discloses a protective assembly for concrete precast stairs, which relates to the technical field of concrete precast stairs and comprises a fixed support and a driving gear, a transmission shaft is arranged in a bearing at the middle end of the bottom of the fixed support in a penetrating manner, a crank handle is mounted at the bottom end of the transmission shaft, and the driving gear is arranged outside the transmission shaft. A first driven gear and a second driven gear are arranged on the two sides of the driving gear correspondingly, a first positive and negative tooth lead screw is arranged in the middle of the first driven gear in a penetrating mode, and a second positive and negative tooth lead screw is arranged in the middle of the second driven gear in a penetrating mode. According to the protection assembly for the concrete prefabricated stair, the multiple protection rods which are the same as the first protection rods in structure are distributed at the rear end of the rhombic guardrail frame, the first protection rods are driven by the lead screw nuts to do linear displacement in the opposite or opposite directions along the exteriors of the first positive and negative tooth lead screw and the second positive and negative tooth lead screw, and the rhombic guardrail frame can be deformed; therefore, the protection assembly can be adjusted in the length direction, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated concrete stairs, in particular to a protective assembly for prefabricated concrete stairs. Background Art

[0002] With the market demand for prefabricated stairs, the frequency of use of prefabricated stairs in different occasions is also increasing. Concrete prefabricated stairs are generally fixed to the wall on one side. After installation, in order to ensure the safety of subsequent construction, protective components are needed to protect the other side of the stairs.

[0003] For example, the utility model with application number CN201921423008.3 discloses a prefabricated assembled concrete staircase protection device. The movable design of the protective guardrail of the staircase body of the utility model can not only protect the staircase body, but also adjust the protective guardrail when transporting goods, so that it is convenient to transport and transfer the goods; according to the specific size of the goods, the protective guardrail can be rotated 90 degrees outward or inward, so that the L-shaped rod is engaged with the limit groove, so as to facilitate the transfer of goods. However, the length of the protective component of the prefabricated concrete staircase is not variable, and there are certain disadvantages when adapting to prefabricated concrete stairs of different lengths.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a protective component for precast concrete stairs is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a protective assembly for a prefabricated concrete staircase to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective component for precast concrete stairs, comprising a fixed bracket and a driving gear, a transmission shaft is passed through a bearing at the middle end of the bottom of the fixed bracket, and a hand crank is installed at the bottom end of the transmission shaft, the driving gear is arranged on the outside of the transmission shaft, and a driven gear 1 and a driven gear 2 are respectively arranged on both sides of the driving gear, a forward and reverse screw rod 1 is passed through the middle of the driven gear 1, a forward and reverse screw rod 2 is passed through the middle of the driven gear 2, and the outsides of the forward and reverse screw rods 1 and 2 are both connected with screw nuts, a protective rod 1 is provided at the front end of the screw nut, and the front end of the protective rod 1 is rotatably connected to a rhombus guardrail frame through a rotating shaft, and the rear end of the rhombus guardrail frame is also connected to protective rods 2 and 3.

[0007] Furthermore, mounting seats are provided on both sides of the exterior of the fixing bracket, and the mounting seats are in a right-angle structure.

[0008] Furthermore, the transmission shaft, the forward and reverse screw rods 1 and the forward and reverse screw rods 2 are parallel to each other, and both ends of the forward and reverse screw rods 1 and the forward and reverse screw rods 2 are rotatably connected to the fixed bracket.

[0009] Furthermore, the screw nuts are symmetrically distributed about the center position of the positive and negative thread screws, and a total of four screw nuts are provided.

[0010] Furthermore, the protection bar one, the protection bar two and the protection bar three are parallel to each other, and the protection bar two and the protection bar three are symmetrically distributed about the center position of the diamond-shaped guardrail frame.

[0011] Furthermore, a laser ranging sensor is installed at one end of the second protection rod, and an alarm is installed at one end of the third protection rod.

[0012] Furthermore, a controller is installed on the inner surface of the fixed bracket, and the controller is electrically connected to a laser ranging sensor and an alarm.

[0013] The utility model provides a protective assembly for a prefabricated concrete staircase, which has the following beneficial effects:

[0014] 1. A plurality of protection rods having the same structure as the protection rod 1 are distributed at the rear end of the diamond-shaped guardrail frame of the utility model. The protection rod 1 is driven by the screw nut to make linear displacements in opposite directions along the outside of the positive and negative screw rods 1 and the positive and negative screw rods 2, respectively, so that the diamond-shaped guardrail frame can be deformed to cause the protection component to be adjusted in the length direction, thereby increasing practicality.

[0015] 2. The signal output end of the laser distance measuring sensor of the utility model is connected to the signal input end of the controller so that the laser distance measuring sensor can feed back the measured distance value between the laser distance measuring sensor and the alarm to the controller. When the set value is reached, the controller controls the alarm to sound, reminding the worker to release the hand crank, thereby accurately adjusting the length of the protective component to better adapt to concrete prefabricated stairs of different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a protective assembly for a prefabricated concrete staircase of the utility model;

[0017] Figure 2 It is a schematic structural diagram of a positive and negative threaded rod 1 and a positive and negative threaded rod 2 of a protective assembly for a prefabricated concrete staircase of the utility model;

[0018] Figure 3 The utility model is a three-dimensional structural schematic diagram of a driving gear, a driven gear 1 and a driven gear 2 of a protective assembly for a precast concrete staircase.

[0019] In the figure: 1. Fixed bracket; 2. Mounting seat; 3. Transmission shaft; 4. Hand crank; 5. Driving gear; 6. Driven gear one; 7. Forward and reverse screw rod one; 8. Driven gear two; 9. Forward and reverse screw rod two; 10. Screw nut; 11. Guard rod one; 12. Diamond guardrail frame; 13. Guard rod two; 14. Laser ranging sensor; 15. Guard rod three; 16. Alarm; 17. Controller. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0021] like Figures 1 to 3 As shown, a protective assembly for a prefabricated concrete staircase comprises a fixed bracket 1 and a driving gear 5, mounting seats 2 are arranged on both sides of the outside of the fixed bracket 1, and the mounting seats 2 are in a right-angled structure, a transmission shaft 3 is passed through a bearing at the middle end of the bottom of the fixed bracket 1, and a hand crank 4 is installed at the bottom end of the transmission shaft 3, the driving gear 5 is arranged on the outside of the transmission shaft 3, and a driven gear 1 6 and a driven gear 2 8 are respectively arranged on both sides of the driving gear 5, a forward and reverse threaded screw rod 1 7 is passed through the middle of the driven gear 1 6, a forward and reverse threaded screw rod 2 9 is passed through the middle of the driven gear 2 8, and the outer sides of the forward and reverse threaded screw rods 1 7 and the forward and reverse threaded screw rods 2 9 are both connected with screw nuts 10, and the front of the screw nuts 10 A protective rod 11 is provided at the end, and the front end of the protective rod 11 is rotatably connected to a diamond-shaped guardrail frame 12 through a rotating shaft, and the rear end of the diamond-shaped guardrail frame 12 is also connected to a protective rod 2 13 and a protective rod 3 15, the transmission shaft 3, the positive and negative threaded screw rod 1 7 and the positive and negative threaded screw rod 2 9 are parallel to each other, and both ends of the positive and negative threaded screw rod 1 7 and the positive and negative threaded screw rod 2 9 are rotatably connected to the fixed bracket 1, the screw nuts 10 are symmetrically distributed about the center position of the positive and negative threaded screw rod 1 7, and a total of four screw nuts 10 are provided, the protective rod 11, the protective rod 2 13 and the protective rod 3 15 are parallel to each other, and the protective rod 2 13 and the protective rod 3 15 are symmetrically distributed about the center position of the diamond-shaped guardrail frame 12.

[0022] The specific operation is as follows: a plurality of protection rods with the same structure as the protection rod 11 are distributed at the rear end of the diamond guardrail frame 12. The protection rod 11 is driven by the screw nut 10 to make linear displacements in opposite directions along the outside of the positive and negative screw rods 1 7 and the positive and negative screw rods 2 9, respectively, so that the diamond guardrail frame 12 can be deformed to cause the protection component to be adjusted in the length direction, thereby increasing practicality.

[0023] like Figure 1As shown, a laser ranging sensor 14 is installed at one end of the protective rod 2 13 , an alarm 16 is installed at one end of the protective rod 3 15 , a controller 17 is installed on the inner surface of the fixed bracket 1 , and the controller 17 is electrically connected to the laser ranging sensor 14 and the alarm 16 .

[0024] The specific operation is as follows: the signal output end of the laser ranging sensor 14 is connected to the signal input end of the controller 17, so that the laser ranging sensor 14 can feed back the measured distance value between the laser ranging sensor 14 and the alarm 16 to the controller 17. When the set value is reached, the controller 17 controls the alarm 16 to sound an alarm, reminding the worker to release the hand crank 4, thereby accurately adjusting the length of the protective component to better adapt to concrete prefabricated stairs of different lengths.

[0025] In summary, when the protective assembly for the precast concrete staircase is used, the length of the protective assembly is first adjusted according to the length of the precast concrete staircase, that is, the hand crank 4 is used to drive the transmission shaft 3 and the driving gear 5 to rotate, and the driving gear 5 drives the driven gear 1 6 and the driven gear 2 8 to drive the positive and negative threaded screw 1 7 and the positive and negative threaded screw 2 9 to rotate, so that the screw nut 10 on the upper side of the positive and negative threaded screw 1 7 and the positive and negative threaded screw 2 9 and the screw nut 10 on the lower side of the positive and negative threaded screw 1 7 and the positive and negative threaded screw 2 9 each drive a protective rod 11 to move in opposite directions;

[0026] As the guardrail 11 is displaced, the diamond guardrail frame 12 will be deformed, so that the diamond guardrail frame 12 changes the distance between the guardrail 2 13 and the guardrail 3 15. At this time, the laser rangefinder sensor 14 emits a laser pulse to the target alarm 16, and the measured distance value between the alarm 16 is fed back to the controller 17. When the set value consistent with the length of the precast concrete stairs is reached, the controller 17 controls the alarm 16 to sound an alarm, reminding the worker to loosen the hand crank 4 so that the position of the screw nut 10 is fixed, thereby achieving precise control of the length of the protection component and ensuring the compatibility of the protection component with the precast concrete stairs. Finally, the mounting seat 2 and the fixing bracket 1 are installed on the side of the precast concrete stairs away from the wall to protect the precast concrete stairs and improve safety.

[0027] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A protective assembly for a prefabricated concrete staircase, comprising a fixed bracket (1) and a driving gear (5), characterized in that: A transmission shaft (3) is inserted into the bearing at the middle end of the bottom of the fixed bracket (1), and a hand crank (4) is installed at the bottom end of the transmission shaft (3). The driving gear (5) is arranged outside the transmission shaft (3), and a driven gear (6) and a driven gear (8) are respectively arranged on both sides of the driving gear (5). A positive and negative threaded rod (7) is inserted in the middle of the driven gear (6), and a positive and negative threaded rod (9) is inserted in the middle of the driven gear (8), and the positive and negative threaded rod (7) and the positive and negative threaded rod (9) are both connected to the outside of the positive and negative threaded rod (7) and the positive and negative threaded rod (9). A protective rod (11) is arranged at the front end of the screw nut (10), and the front end of the protective rod (11) is rotatably connected to a rhombus guardrail frame (12) through a rotating shaft, and the rear end of the rhombus guardrail frame (12) is also connected to a protective rod (13) and a protective rod (15).

2. A protective assembly for precast concrete stairs according to claim 1, characterized in that: Mounting seats (2) are arranged on both sides of the exterior of the fixing bracket (1), and the mounting seats (2) are in a right-angle structure.

3. A protective assembly for precast concrete stairs according to claim 1, characterized in that: The transmission shaft (3), the first positive and negative threaded rod (7) and the second positive and negative threaded rod (9) are parallel to each other, and both ends of the first positive and negative threaded rod (7) and the second positive and negative threaded rod (9) are rotatably connected to the fixed bracket (1).

4. A protective assembly for a precast concrete staircase according to claim 1, characterized in that: The screw nuts (10) are symmetrically distributed about the center position of the positive and negative thread screw (7), and a total of four screw nuts (10) are provided.

5. The protective assembly for precast concrete stairs according to claim 1, characterized in that: The first protection rod (11), the second protection rod (13) and the third protection rod (15) are parallel to each other, and the second protection rod (13) and the third protection rod (15) are symmetrically distributed about the center position of the diamond-shaped guardrail frame (12).

6. The protective assembly for precast concrete stairs according to claim 1, characterized in that: A laser distance sensor (14) is installed at one end of the second protection rod (13), and an alarm (16) is installed at one end of the third protection rod (15).

7. A protective assembly for a precast concrete staircase according to claim 6, characterized in that: A controller (17) is installed on the inner surface of the fixed bracket (1), and the controller (17) is electrically connected to a laser distance measuring sensor (14) and an alarm (16).

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