Foundation pit safety protection device for building construction site

Abstract

The utility model relates to the technical field of safety protection equipment, in particular to a building construction site foundation pit safety protection device. Comprising a central cylinder, waterproof cloth and a plurality of fixed supporting columns, the fixed supporting columns are of hollow structures, and the bottom ends of the multiple fixed supporting columns are all connected with pointed ends. The multiple fixed supporting columns are arranged around the central axis of the center cylinder in an annular array mode, and first connecting rods and second connecting rods are rotationally connected between the fixed supporting columns and the center cylinder. The waterproof cloth is provided with a hook-and-loop fastener thorn face, a first hook-and-loop fastener loop face and a second hook-and-loop fastener loop face, the end of the waterproof cloth is arranged in the fixing supporting column on any side, and the fixing supporting column is provided with a through hole allowing the waterproof cloth to penetrate out. An elastic reset mechanism used for achieving automatic winding of the waterproof cloth is further installed on the fixed supporting column. According to the technical scheme, installation and folding work can be conveniently carried out, the occupied space is small, the weight is light, transportation is convenient, the manufacturing cost is low, and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of safety protection equipment technology, and in particular to a safety protection device for foundation pits at construction sites. Background Technology

[0002] When constructing highways, it is often necessary to build the foundation, which usually involves digging several foundation pits on the ground. To prevent people and vehicles from accidentally entering, safety protection devices for the foundation pits need to be installed.

[0003] In existing technologies, protective plates are typically used to surround the pit to prevent unauthorized personnel from entering the pit. However, the large size of the plates makes the overall transportation and installation of the equipment inconvenient, and the cost of using them is also high. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background technology by proposing a safety protection device for foundation pits at construction sites.

[0005] The technical solution of this utility model is a safety protection device for foundation pits at construction sites, comprising:

[0006] Multiple fixed supports, each with a hollow structure, and each fixed support has a pointed end connected to its bottom.

[0007] A central cylinder, with multiple fixed supports arranged in a circular array around the central axis of the central cylinder, and a first connecting rod and a second connecting rod rotatably connected between the fixed supports and the central cylinder;

[0008] The waterproof fabric has a hook and loop fastener, a first hook and loop fastener, and a second hook and loop fastener. The end of the waterproof fabric is located inside a fixed support on either side. The fixed support has a perforation for the waterproof fabric to pass through. The fixed support is also equipped with an elastic reset mechanism for automatically rewinding the waterproof fabric.

[0009] Preferably, the second connecting rod has an elongated hole along its length, and a rotating rod is rotatably mounted on the second connecting rod, with the rotating shaft of the second connecting rod located inside the elongated hole.

[0010] Preferably, reflective strips are installed on the waterproof fabric.

[0011] Preferably, the elastic reset mechanism includes a take-up shaft and a measuring tape spring. The take-up shaft is rotatably mounted inside the corresponding fixed support. One end of the waterproof cloth is connected to the take-up shaft. An outer cover is provided at the upper end of the fixed support. The measuring tape spring is mounted inside the outer cover. One end of the measuring tape spring is connected to the take-up shaft.

[0012] Preferably, a limiting rod is provided at the outer end of the waterproof fabric. The length of the limiting rod is greater than the length of the perforation or the width of the limiting rod is greater than the width of the perforation, whichever requirement is met.

[0013] Preferably, the central cylinder, the fixed support, the first connecting rod, and the second connecting rod form a parallelogram structure.

[0014] Preferably, the safety protection device for the foundation pit at the construction site also includes a threaded ring, and the upper part of the central cylinder is provided with a threaded part that mates with the threaded ring.

[0015] Preferably, an annular groove is provided on the outer side of the fixed support, and the height of the annular groove is equal to the width of the waterproof cloth.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention sets up multiple fixed pillars and uses a first connecting rod and a second connecting rod to connect the central cylinder and the fixed pillars, thereby enabling the device to be easily folded. Furthermore, by setting up a waterproof cloth to protect the perimeter of the device, the size of the device is further reduced, and the weight of the device is greatly reduced, making the device easy to transport. Attached Figure Description

[0017] Figure 1 and Figure 2 All of these are schematic diagrams of the structure of this utility model.

[0018] Figure 3 This is a cross-sectional view of the fixed support column in this utility model.

[0019] Reference numerals: 1. Central cylinder; 2. Fixed support; 201. Perforation; 202. Annular groove; 3. Waterproof cloth; 41. First connecting rod; 42. Second connecting rod; 421. Long strip hole; 5. Rotating rod; 6. Pointed end; 7. Reflective strip; 8. Hook and loop fastener; 91. First hook and loop fastener; 92. Second hook and loop fastener; 10. Threaded ring; 11. Threaded part; 12. Rewinding shaft; 13. Outer cover; 14. Measuring tape spring; 15. Limiting rod. Detailed Implementation

[0020] Example 1

[0021] like Figures 1-3 As shown in the figure, the safety protection device for foundation pits at construction sites proposed in this embodiment includes a central cylinder 1, a waterproof cloth 3, and multiple fixed support columns 2.

[0022] The fixed support 2 has a hollow structure, and the bottom ends of multiple fixed support 2 are connected to pointed heads 6. Multiple fixed support 2 are arranged in a circular array around the central axis of the central cylinder 1. The fixed support 2 and the central cylinder 1 are rotatably connected by a first connecting rod 41 and a second connecting rod 42. The central cylinder 1, fixed support 2, first connecting rod 41 and second connecting rod 42 form a parallelogram structure. The above structure ensures that the fixed support 2 is always parallel to the central cylinder 1.

[0023] The waterproof fabric 3 is provided with a hook and loop fastener 8, a first hook and loop fastener 91, and a second hook and loop fastener 92. The end of the waterproof fabric 3 is located inside a fixed support 2 on either side. The fixed support 2 has a through hole 201 for the waterproof fabric 3 to pass through. Furthermore, the fixed support 2 is equipped with an elastic reset mechanism for automatically retracting the waterproof fabric 3. The elastic reset mechanism includes a winding shaft 12 and a measuring tape spring 14. The winding shaft 12 is rotatably mounted inside the corresponding fixed support 2. One end of the waterproof fabric 3 is connected to the winding shaft 12. An outer cover 13 is provided at the upper end of the fixed support 2. The measuring tape spring 14 is installed inside the outer cover 13, and one end of the measuring tape spring 14 is connected to the winding shaft 12. When the waterproof fabric 3 is pulled out, if the waterproof fabric 3 is released at this time... The waterproof cloth 3, driven by the spring force of the measuring tape spring 14, drives the winding shaft 12 to reverse, automatically storing the waterproof cloth 3 inside the fixed support 2. An annular groove 202 is provided on the outer side of the fixed support 2. The height of the annular groove 202 is equal to the width of the waterproof cloth 3. The annular groove 202 is used to limit the waterproof cloth 3 and prevent it from slipping. A limiting rod 15 is provided at the outer end of the waterproof cloth 3. The length of the limiting rod 15 is greater than the length of the perforation 201 or the width of the limiting rod 15 is greater than the width of the perforation 201, which meets either requirement. The purpose of the limiting rod 15 is to prevent the outer end of the waterproof cloth 3 from being rolled up to the inside of the fixed support 2. A reflective strip 7 is installed on the waterproof cloth 3. The reflective strip 7 can serve as a reflective warning at night.

[0024] Specifically, before enclosing the pit, the device needs to be deployed, driving multiple fixed supports 2 to deploy simultaneously, so that the first connecting rod 41 and the second connecting rod 42 are both perpendicular to the central cylinder 1. The first connecting rod 41 and the second connecting rod 42 are set to reduce the inner gap of the device to prevent personnel from falling into the pit. The central cylinder 1 is placed above the center of the pit, and the multiple fixed supports 2 are all located on the outside of the pit. Then, the upper end of the fixed support 2 is struck with a tool so that the pointed end 6 at the bottom extends into the soil, thereby completing the fixing of the fixed support 2. The above is the main structure installation work of the device. Next, the waterproof cloth 3 wrapped inside the fixed support 2 is pulled out so that the waterproof cloth 3 covers the outside of the multiple fixed supports 2. When the waterproof cloth 3 is in a taut state, the hook and loop fastener 8 is attached to the first hook and loop fastener 91, thereby realizing the end-to-end connection of the waterproof cloth 3. The waterproof cloth 3 can protect the perimeter of the device and prevent non-professionals from entering the inside of the deep pit.

[0025] The following is the disassembly process of the device: Pull the pointed ends 6 at the bottom of the multiple fixed pillars 2 out of the soil, and then rotate the first connecting rod 41 and the second connecting rod 42 so that the multiple fixed pillars 2 move closer to the central cylinder 1 in sync, so as to reduce the gap between the central cylinder 1 and the fixed pillars 2, thereby reducing the space occupied by the entire device. Then, wrap the waterproof cloth 3 around the outer surface of the multiple fixed pillars 2. After the waterproof cloth 3 is about to be wrapped, stick the hook and loop side 8 to the second hook and loop side 92 together, which can be used to fix the folded device.

[0026] In summary, this technical solution facilitates installation and folding, occupies little space, is lightweight, easy to transport, has low manufacturing costs, and is highly practical.

[0027] Example 2

[0028] like Figure 2 As shown in the figure, this embodiment proposes a safety protection device for foundation pits at construction sites. Compared with the first embodiment, in this embodiment, a long hole 421 is provided on the second connecting rod 42 along its length direction, and a rotating rod 5 is rotatably installed on the second connecting rod 42. The rotating shaft of the second connecting rod 42 is located inside the long hole 421. In the initial state, the rotating rod 5 is completely placed inside the long hole 421. After the main structure of the device is installed, the rotating rod 5 is driven to rotate from the inside of the long hole 421, thereby further reducing the inner gap of the device.

[0029] Example 3

[0030] like Figure 1As shown, the safety protection device for foundation pits at construction sites proposed in this embodiment, compared with the first embodiment, further includes a threaded ring 10. The upper part of the central cylinder 1 is provided with a threaded part 11 that cooperates with the threaded ring 10. After the device is installed, the threaded ring 10 is rotated to make it threadedly connected with the threaded part 11. When the threaded ring 10 is rotated to the set position, the threaded ring 10 contacts the multiple first connecting rods 41, which can limit the first connecting rods 41 and prevent the first connecting rods 41 from rotating.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A safety protection device for foundation pits at construction sites, characterized in that, include: Multiple fixed pillars (2), each fixed pillar (2) has a hollow structure, and each fixed pillar (2) has a pointed end (6) connected to its bottom. A central cylinder (1) is provided, and multiple fixed support columns (2) are arranged in a circular array around the central axis of the central cylinder (1). The fixed support columns (2) are rotatably connected to the central cylinder (1) by a first connecting rod (41) and a second connecting rod (42). Waterproof fabric (3) is provided with hook and loop fastener (8), first hook and loop fastener (91) and second hook and loop fastener (92). The end of the waterproof fabric (3) is located inside the fixed support (2) on either side. The fixed support (2) is provided with a through hole (201) for the waterproof fabric (3) to pass through. The fixed support (2) is also equipped with an elastic reset mechanism for automatically rewinding the waterproof fabric (3).

2. The safety protection device for foundation pits at construction sites according to claim 1, characterized in that, The second connecting rod (42) has an elongated hole (421) along its length direction. A rotating rod (5) is rotatably mounted on the second connecting rod (42). The rotating shaft of the second connecting rod (42) is located inside the elongated hole (421).

3. The safety protection device for foundation pits at construction sites according to claim 1, characterized in that, Reflective strips (7) are installed on the waterproof fabric (3).

4. A safety protection device for foundation pits at construction sites according to claim 1, characterized in that, The elastic reset mechanism includes a take-up shaft (12) and a measuring tape spring (14). The take-up shaft (12) is rotatably installed inside the corresponding fixed support (2). One end of the waterproof cloth (3) is connected to the take-up shaft (12). An outer cover (13) is provided at the upper end of the fixed support (2). The measuring tape spring (14) is installed inside the outer cover (13). One end of the measuring tape spring (14) is connected to the take-up shaft (12).

5. A safety protection device for foundation pits at construction sites according to claim 4, characterized in that, A limiting rod (15) is provided at the outer end of the waterproof cloth (3). The length of the limiting rod (15) is greater than the length of the perforation (201) or the width of the limiting rod (15) is greater than the width of the perforation (201). Either requirement is met.

6. A safety protection device for foundation pits at construction sites according to claim 1, characterized in that, The central cylinder (1), the fixed support column (2), the first connecting rod (41), and the second connecting rod (42) form a parallelogram structure.

7. A safety protection device for foundation pits at construction sites according to claim 1, characterized in that, It also includes a threaded ring (10), and the upper part of the central cylinder (1) is provided with a threaded part (11) that mates with the threaded ring (10).

8. A safety protection device for foundation pits at construction sites according to claim 1, characterized in that, An annular groove (202) is provided on the outer side of the fixed support (2), and the height of the annular groove (202) is equal to the width of the waterproof cloth (3).

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