Anti-skid escalator for middle hole of prefabricated box girder

Abstract

The utility model discloses an anti-slip escalator for a hole in a prefabricated box girder, and belongs to the technical field of road and bridge construction auxiliary devices. The method comprises the following steps: prefabricating a box girder; a box chamber is arranged in the middle of the prefabricated box girder; ladders are arranged at the side ends of the prefabricated box girders; a cantilever-shaped horizontal lapping rod is arranged at the upper part of the middle part of the escalator; the extending end of the horizontal lapping rod extends into the box chamber and then is lapped on the inner bottom surface of the box chamber; a positioning block is further arranged on the side part of the escalator; a connecting rod is detachably mounted on the positioning block; an auxiliary clamping piece is mounted at the other end of the connecting rod; one end of the auxiliary clamping piece is detachably mounted on the prefabricated box girder; the ladder effectively solves the problems that an existing ladder used for climbing to a box chamber of a prefabricated box girder is poor in stability, and large safety risks exist.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for road and bridge construction, specifically to an anti-slip ladder used in the central opening of a precast box girder. Background Technology

[0002] During road and bridge construction or precast box girder processing, workers often need to climb ladders to reach the box chamber (central opening) of the precast box girder for work. Traditional construction ladders are mostly directly attached to the side of the box girder, relying on the friction between the ladder feet and the ground or simple binding for fixation. However, the box chamber is usually located at a height of about 2 meters above the ground or the top of the pier, and the area available for installing the ladder is narrow. This results in poor stability of the current ladders, and there is a significant risk of side slippage and overturning when affected by external factors. This is the main problem that needs to be solved. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an anti-slip ladder for the central opening of a precast box girder, so as to solve the problem that the current ladders used for climbing to the box girder chamber have poor stability and pose a great safety risk.

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] An anti-slip ladder for use in the central opening of a precast box girder; it includes a precast box girder; a box chamber is provided in the middle of the precast box girder; a ladder is provided at the side end of the precast box girder; a cantilevered horizontal support rod is provided at the upper middle position of the ladder; the extended end of the horizontal support rod extends into the box chamber and rests on the inner bottom surface of the box chamber; a positioning block is also provided on the side of the ladder; a connecting rod is detachably installed on the positioning block; an auxiliary clamp is installed at the other end of the connecting rod; one end of the auxiliary clamp is detachably installed on the precast box girder.

[0006] Preferably, a groove is provided on the side end face of the precast box girder; the ladder rests on the precast box girder at a position adjacent to the groove; the upper part of the groove communicates with the box chamber; the auxiliary clamp is a telescopic support rod whose working length can be adjusted according to the use needs; protective top plates are provided at both ends of the auxiliary clamp; the two protective top plates are respectively pressed against the groove walls on both sides of the groove; one end of the connecting rod is connected to the middle of the auxiliary clamp.

[0007] Preferably, anti-slip sleeves are wrapped around each crossarm of the escalator; the upper part of the escalator, from the height of the compartment to the top of the escalator, is an open structure.

[0008] Preferably, there is a pair of horizontal support rods, which are respectively installed on the uprights on both sides of the escalator; positioning holes are also provided on the horizontal support rods.

[0009] Preferably, the positioning block is a block-shaped structure fixed to the side of the escalator; a guide hole is opened in the middle of the positioning block along the horizontal direction, and pin holes are opened on both the positioning block and the connecting rod; one end of the connecting rod is inserted into the guide hole and then detachably connected to the positioning block by a pin.

[0010] Preferably, the connecting rod is an L-shaped folding rod component, one end of which is connected to the middle of the auxiliary clamp.

[0011] The beneficial effects of this utility model are reflected in the following aspects:

[0012] 1. By extending horizontal struts into the bottom of the box girder to form support, and combining them with auxiliary clips in the grooves of the precast box girder, the two form an effective anti-slip constraint structure, which can distribute the force on the escalator and greatly reduce the risk of side slip or overturning. It is especially suitable for narrow installation spaces and high-altitude operation scenarios.

[0013] 2. By using telescopic support rods as auxiliary fasteners, the working length can be flexibly adjusted. Combined with the protective top plates on both sides of the groove, it can adapt to precast box girder structures with different groove widths, enhancing the versatility of the device. At the same time, the connecting rod and the positioning block can be detachably connected by pins, which facilitates quick installation and disassembly and adapts to the dynamic needs of the construction site.

[0014] 3. Install anti-slip sleeves on the crossarms of the escalator to increase friction during climbing and reduce the risk of people slipping; the top area of ​​the escalator adopts an open structure design to provide a more spacious working entrance and make it more convenient to go up and down the escalator.

[0015] 4. Horizontal support rods are symmetrically installed on the uprights on both sides of the escalator and connected to the pre-embedded parts of the chamber through positioning holes to form multi-point fixation;

[0016] 5. This application also has the advantages of simple transportation and assembly processes, which can reduce the time spent working at height and reduce operational risks. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention in an embodiment;

[0018] Figure 2 yes Figure 1 A partially enlarged schematic diagram of the device located in the chamber;

[0019] Explanation of reference numerals in the attached drawings: 1. Precast box girder, 2. Box chamber, 3. Groove, 4. Ladder, 5. Horizontal support rod, 6. Connecting rod, 7. Auxiliary fastener, 8. Anti-slip sleeve, 9. Positioning block. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0021] Example:

[0022] Reference Figure 1 This embodiment provides an anti-slip ladder for use in the central opening of a precast box girder; it includes a precast box girder 1; a box chamber 2 is provided in the middle of the precast box girder 1; a ladder 4 is attached to the side end of the precast box girder 1; a cantilevered horizontal support rod 5 is provided at the upper middle part of the ladder 4; the extended end of the horizontal support rod 5 extends into the box chamber 2 and rests on the inner bottom surface of the box chamber 2; a positioning block 9 is also provided on the side of the ladder 4; a connecting rod 6 is detachably installed on the positioning block 9; an auxiliary clamp 7 is installed at the other end of the connecting rod 6; one end of the auxiliary clamp 7 is detachably installed on the precast box girder 1. The horizontal support rod and the ladder upright are connected by welding or bolts, and an anti-slip rubber pad can be provided at its end to increase the frictional resistance with the inner bottom surface of the box chamber.

[0023] A groove 3 is provided on the side end face of the precast box girder 1; the ladder 4 rests on the precast box girder 1 at a position adjacent to the groove; the upper part of the groove 3 communicates with the box chamber 2; the auxiliary clamp 7 is a telescopic support rod whose working length can be adjusted according to the needs of use; protective top plates are provided at both ends of the auxiliary clamp 7; the two protective top plates are respectively set on the groove walls on both sides of the groove 3; one end of the connecting rod 6 is connected to the middle of the auxiliary clamp 7. The protective top plates at both ends are made of rubber to buffer the pressure and avoid damaging the surface of the groove.

[0024] Anti-slip sleeves 8 are wrapped around each crossarm of escalator 4; the upper part of escalator 4, from the height of the compartment 2 to the top of escalator 4, is an open structure. The anti-slip sleeves are made of corrugated rubber.

[0025] There is a pair of horizontal support rods 5, which are respectively installed on the uprights on both sides of the escalator 4; positioning holes are also provided on the horizontal support rods 5. In this embodiment, a pull rope is also tied to the embedded part of the box chamber, and the other end of the pull rope is connected to the positioning hole.

[0026] The positioning block 9 is a block-shaped structure fixed to the side of the escalator 4; a guide hole is opened in the middle of the positioning block 9 along the horizontal direction, and pin holes are opened on both the positioning block 9 and the connecting rod 6; after one end of the connecting rod 6 is inserted into the guide hole, it is detachably connected to the positioning block 9 by a pin.

[0027] Link 6 is an L-shaped folding rod component, with one end connected to the middle of the auxiliary clamp 7. Reinforcing ribs are used at the corners of this L-shaped folding rod to improve its bending resistance.

[0028] When using the utility model device in this embodiment, the following steps can be followed:

[0029] 1. Place the escalator 4 against the side of the precast box girder 1, and extend the horizontal support rod 5 into the box chamber 2. At the same time, adjust the extended end of the horizontal support rod until it is firmly attached to the bottom surface inside the box chamber.

[0030] 2. Place the auxiliary clip 7 into the groove 3 and rotate it to adjust its length until the protective top plates at both ends are tightly pressed against both sides of the groove;

[0031] 3. Insert the connecting rod 6 into the guide hole of the positioning block 9, align the pin hole, and then insert the pin to fix it;

[0032] 4. Check the stability of the escalator 4. If necessary, tie the pull rope to the embedded parts in the box chamber through the positioning holes on the horizontal support rod 5;

[0033] 5. After construction is completed, disassemble the connecting rods, auxiliary clamps and horizontal support rods in sequence, and then retract the escalator.

Claims

1. A non-slip handrail for use in the central opening of a precast box girder, comprising a precast box girder (1); a box chamber (2) is provided in the middle of the precast box girder (1); characterized in that: A ladder (4) is mounted on the side of the precast box girder (1); a horizontal strut (5) in the shape of a cantilever is set at the upper part of the middle of the ladder (4); the extended end of the horizontal strut (5) extends into the box chamber (2) and rests on the inner bottom surface of the box chamber (2); a positioning block (9) is also set on the side of the ladder (4); a connecting rod (6) is detachably installed on the positioning block (9); an auxiliary clamp (7) is installed at the other end of the connecting rod (6); one end of the auxiliary clamp (7) is detachably installed on the precast box girder (1).

2. The anti-slip ladder for the central opening of a precast box girder according to claim 1, characterized in that: A groove (3) is provided on the side end face of the precast box girder (1); the ladder (4) rests on the precast box girder (1) at a position adjacent to the groove; the upper part of the groove (3) is connected to the box chamber (2); the auxiliary clamp (7) is a telescopic support rod whose working length can be adjusted according to the use needs; protective top plates are provided at both ends of the auxiliary clamp (7); the two protective top plates are respectively pressed on the groove walls on both sides of the groove (3); one end of the connecting rod (6) is connected to the middle of the auxiliary clamp (7).

3. The anti-slip ladder for the central opening of a precast box girder according to claim 1, characterized in that: Anti-slip sleeves (8) are wrapped around each crossarm of the escalator (4); the area from the height of the upper part of the escalator (4) corresponding to the height of the box (2) to the top of the escalator (4) is an open structure.

4. The anti-slip ladder for the central opening of a precast box girder according to claim 1, characterized in that: There is a pair of horizontal support rods (5), which are respectively installed on the uprights on both sides of the escalator (4); positioning holes are also provided on the horizontal support rods (5).

5. The anti-slip ladder for the central opening of a precast box girder according to claim 1, characterized in that: The positioning block (9) is a block structure fixed on the side of the escalator (4); a guide hole is opened in the middle of the positioning block (9) in the horizontal direction, and pin holes are opened on both the positioning block (9) and the connecting rod (6); after one end of the connecting rod (6) is inserted into the guide hole, it is detachably connected to the positioning block (9) by a pin.

6. The anti-slip ladder for the central opening of a precast box girder according to claim 1, characterized in that: The connecting rod (6) is an L-shaped folding rod component, one end of which is connected to the middle of the auxiliary clamp (7).

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