Foldable forced centering mark suitable for limited space

Abstract

The utility model discloses a foldable forced centering sign suitable for limited space, which comprises a placing frame and an inclined support frame, the inclined support frame is used for supporting or suspending the placing frame to be in a horizontal state, one side of the placing frame and one side of the inclined support frame are rotatably mounted on the abdominal wall of a tunnel through a hinge base, and the other side of the placing frame and the other side of the inclined support frame are hinged to the hinge base. The other sides of the connecting rods are detachably connected together; an instrument platform used for installing a forced centering mark or measuring equipment is arranged on the placing frame, and a centering screw is vertically arranged on the instrument platform; the inclined supporting frame is provided with a lap joint part for the placement frame to abut against, the bottom of the placement frame is provided with a plurality of adjusting clamping grooves used for adjusting the abutting position, the lap joint part is provided with a clamp used for being clamped into the clamping grooves, and the inclined supporting frame and the placement frame are further provided with a locking mechanism used for fixing the lap joint state. And the evacuation platform can be folded in a non-measurement period, so that the evacuation platform can pass conveniently, and the passage of personnel and equipment on the evacuation platform is prevented from being hindered.

Description

Technical Field

[0001] This utility model relates to the field of measurement equipment installation technology, specifically to a foldable forced centering marker suitable for limited spaces. Background Technology

[0002] In the construction and maintenance of tunnel engineering, accurate control surveying is crucial for ensuring the construction quality, safety, and long-term stability of the tunnel. Forced centering markers, as a key component of control surveying, ensure that measuring instruments can be accurately centered on the measuring points, thereby minimizing measurement errors and providing high-precision measurement data for tunnel engineering.

[0003] However, existing mandatory centering signs in tunnels generally have a significant problem: in practical applications, these signs are usually fixed and extend outwards. This structural feature, especially in tunnels with limited space and evacuation platforms, significantly hinders the passage of personnel and equipment. In emergency situations requiring evacuation, the extended mandatory centering signs can become obstacles, affecting evacuation efficiency and potentially leading to falls, collisions, and other safety accidents, posing a potential risk to the safe operation of the tunnel. Furthermore, during routine tunnel maintenance work, maintenance personnel and related equipment moving on the evacuation platform are easily interfered with by the extended signs, reducing the efficiency of maintenance work. Utility Model Content

[0004] This utility model aims to solve the technical problems existing in the prior art. In particular, it innovatively proposes a foldable forced centering sign suitable for limited spaces, which can be folded to facilitate the passage of evacuation platforms, thereby overcoming the defect of existing forced centering signs in tunnels that affect the passage of evacuation platforms.

[0005] To achieve the above objectives, this utility model provides a foldable forced centering marker suitable for limited spaces, comprising a placement frame and an inclined support frame. The inclined support frame is used to support or pull the placement frame in a horizontal state. One side of both the placement frame and the inclined support frame is rotatably mounted on the tunnel wall via a hinged base, and the other side is detachably connected together. The placement frame is provided with an instrument platform for installing forced centering markers or measuring equipment, and the instrument platform is vertically provided with centering screws.

[0006] The inclined support frame is provided with an overlapping part for the placement frame to rest against. The bottom of the placement frame is provided with several adjustment slots for adjusting the overlapping position. The overlapping part is provided with a clip for locking into the slot. The inclined support frame and the placement frame are also equipped with a locking mechanism for fixing the overlapping state.

[0007] In the above solution: the bottom of the placement frame is serrated, forming several adjustment slots, and the clips of the overlapping part are also serrated. Adjustment can be made through the serrations, resulting in a smaller and more precise adjustment range per unit.

[0008] In the above solution: the inclined support frame is located below the placement frame, the overlapping part is the end of the inclined support frame on the other side, and the clip is also located on the end of the inclined support frame on the other side. This ensures that the forced centering mark or measuring equipment is unobstructed, while also reducing the installation height of the inclined support frame, reducing the climbing height for workers, and improving installation efficiency.

[0009] In the above scheme: the locking mechanism includes two parallel legs, and the inclined support frame and the placement frame are both provided with two insertion holes for the locking mechanism to be inserted. The two legs of the locking mechanism are respectively inserted into the two insertion holes to lock the overlapping state.

[0010] In the above solution: the insertion hole of the placement rack is a strip-shaped hole, and the support leg of the locking mechanism that is inserted into the strip-shaped hole is a screw, and the screw is equipped with a clamping nut, which is used to clamp the placement rack against the locking mechanism. The position of the locking mechanism support leg can be adjusted through the strip-shaped hole, thereby ensuring that it can match the tilt angle of the inclined support frame to ensure that the instrument platform is in a horizontal state. The use of the clamping nut for fixing can prevent the support leg of the locking mechanism from sliding in the strip-shaped hole. The other support leg is not threaded and only needs to be inserted into the insertion hole of the inclined support frame, which is convenient and quick, and the screw inserted into the placement rack is clamped by the clamping nut, so it will not slip out.

[0011] In the above solution: the inclined support frame is fixed with straps for folding the inclined support frame and the placement frame after disassembly. The straps can bind the inclined support frame and the placement frame together, preventing swaying under the influence of factors such as vehicle traffic and airflow disturbance in the tunnel, thereby eliminating potential interference with the passage of the evacuation platform.

[0012] In the above scheme: the hinged base is fixed to the abdominal wall by expansion bolts, and the hinged base is provided with hinged lugs for installing the placement frame or the inclined support frame. The placement frame and the inclined support frame are rotatably connected to the hinged lugs by a rotating shaft.

[0013] In the above scheme: at least two levels are set on the instrument platform, one of which extends forward and backward, and the other extends left and right. This satisfies the need for leveling in both forward and backward and left and right directions.

[0014] In the above scheme: the two levels are arranged adjacently in an L-shape; the instrument platform is provided with a groove for mounting the levels, and the levels are embedded in the instrument platform. The adjacent arrangement allows for quick checking of whether the levels are leveled front-to-back or left-to-right, while the embedded installation protects the wall from external impacts.

[0015] In the above scheme: the instrument platform is provided with threaded holes for installing centering screws, and the centering screws extend from the bottom of the instrument platform to the top of the instrument platform.

[0016] In summary, the beneficial effects of this utility model are as follows: The detachable placement frame and inclined support frame can be stacked together during use to form an installation bracket for installing forced centering markers or measuring equipment. After use, they can be folded away for easy passage on evacuation platforms, significantly improving tunnel safety in emergency evacuation situations. They also facilitate the passage of personnel and equipment during routine maintenance, reducing traffic interference and improving work efficiency. The serrated adjustment slots ensure the placement frame is adjusted to a horizontal position as much as possible, meeting the installation requirements of measuring equipment and ensuring measurement accuracy. This is suitable for control measurement operations in confined spaces such as tunnels, effectively improving tunnel operational safety and the reliability of measurement work. Operation is simple; just rotate the placement frame and inclined support frame to the appropriate angle and then lock them using the locking mechanism to prevent accidental rotation, ensuring the stability of the marker during measurement and thus ensuring measurement accuracy. Attached Figure Description

[0017] Figure 1 This is a front view of Embodiment 1 of this utility model.

[0018] Figure 2 This is a right view of Embodiment 1 of this utility model.

[0019] Figure 3 This is a top view of Embodiment 1 of this utility model.

[0020] Figure 4 This is a schematic diagram of the first embodiment of this utility model in use.

[0021] Figure 5 This is a schematic diagram of the folding process in Embodiment 1 of this utility model.

[0022] Figure 6 This is a schematic diagram of the locking mechanism of this utility model.

[0023] Figure 7 This is a schematic diagram of Embodiment 2 of this utility model.

[0024] Figure 8 This is a front view of Embodiment 3 of this utility model.

[0025] Figure 9 This is a right view of Embodiment 3 of this utility model. Detailed Implementation

[0026] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0027] Example 1

[0028] like Figures 1-6 As shown, a foldable forced centering marker suitable for confined spaces is installed on the tunnel's abdominal wall. It includes a placement frame 3 and an inclined support frame 4. The placement frame 3 has an instrument platform 1 for installing the forced centering marker or measuring equipment, and a centering screw 12 is vertically installed on the instrument platform 1. The inclined support frame 4 supports the placement frame 3, keeping the instrument platform 1 horizontal. Both the placement frame 3 and the inclined support frame 4 are rotatably mounted on the tunnel's abdominal wall via hinged bases 2 on one side, while the other side is detachably connected, allowing them to be separated and folded when not in use without obstructing the passage of the evacuation platform 8. Straps 6 are fixed to the inclined support frame 4 for securing the inclined support frame 4 and the placement frame 3 when folded.

[0029] The inclined support frame 4 is provided with an overlapping part for the placement frame 3 to rest against. The bottom of the placement frame 3 is provided with several adjustment slots 7 for adjusting the overlapping position. The overlapping part is provided with a clip for being inserted into the slot 7. The inclined support frame 4 and the placement frame 3 are also equipped with a locking mechanism 5 for fixing the overlapping state.

[0030] To ensure unobstructed access for the mandatory centering marker or measuring equipment, the inclined support frame 4 in this embodiment is positioned below the placement frame 3. This also reduces the installation height of the inclined support frame 4, decreasing the climbing height for workers and improving installation efficiency. The overlapping portion is the other end of the inclined support frame 4, and the clip is also located on the other end of the inclined support frame 4. The inclined support frame 4 abuts against the bottom side of the placement frame 3 through its other end, achieving inclined support for the placement frame 3. The bottom of the placement frame 3 is serrated, forming several adjustment slots 7, and the clips at the overlapping portion are also serrated.

[0031] The hinged base 2 is fixed to the abdominal wall by expansion bolts 21. The hinged base 2 is provided with hinge lugs 22 for mounting the placement frame 3 or the inclined support frame 4. Both the placement frame 3 and the inclined support frame 4 are rotatably connected to the hinge lugs 22 via pivots. In this embodiment, the placement frame 3 includes a pair of crossbars 32 spaced apart front to back. One end of each crossbar 32 is fixed to the hinge lugs 22 via the same pivot, and the other end is fixed to the bottom side of the instrument platform 1. In this embodiment, the inclined support frame 4 is U-shaped, and its two legs are also fixed to the hinge lugs 22 via the same pivot.

[0032] The locking mechanism 5 includes two parallel legs, also in the shape of a chamfer. Both the inclined support frame 4 and the placement frame 3 have insertion holes for the two legs of the locking mechanism 5 to be inserted. The two legs of the locking mechanism 5 are inserted into the two insertion holes respectively, achieving locking of the overlapping state. In this embodiment, the insertion hole of the placement frame 3 is a strip-shaped hole 31, and the leg of the locking mechanism 5 used to insert into the strip-shaped hole 31 is a screw 51, with a locking nut 52 threaded onto the screw 51. The position of the legs of the locking mechanism 5 can be adjusted through the strip-shaped hole 31, thereby ensuring that it matches the tilt angle of the inclined support frame 4 to ensure that the instrument platform 1 is in a horizontal state. The locking nut 52 is used for fixing, preventing the legs of the locking mechanism 5 from sliding within the strip-shaped hole 31. The other leg is not threaded; it only needs to be inserted into the insertion hole of the inclined support frame 4, which is convenient and quick. Furthermore, the screw 51 inserted into the placement frame 3 is secured by the locking nut 52, preventing slippage. Ideally, there should be two locking nuts 52, which clamp the crossbar 32 between them to achieve fixation and improve locking stability. Furthermore, the unthreaded support leg of the locking mechanism 5 should be shorter than the length of the screw 51.

[0033] The instrument platform 1 is provided with threaded holes for mounting centering screws 12, which extend from the bottom of the instrument platform 1 to the top. To ensure that the forced centering mark or measuring equipment is installed in a horizontal position, at least two levels 11 are provided on the instrument platform 1. One of the levels 11 extends forward and backward, while the other extends left and right. The two levels 11 are arranged adjacent to each other in an L-shape. The instrument platform 1 has grooves near its edge for mounting the levels 11. The levels 11 are embedded in the instrument platform 1, and the edge mounting of the levels 11 prevents them from being blocked by the measuring equipment, making it easy to view the levels 11.

[0034] During installation, the installation position of the forced centering marker is determined according to the measurement plan. First, align the two hinged bases 2 with the preset positions on the tunnel's belly wall and install them using expansion bolts 21. Then, install the placement frame 3 and the inclined support frame 4 on the corresponding hinged bases 2, ensuring that the rotating shaft is installed horizontally so that the placement frame 3 and the inclined support frame 4 can rotate smoothly. After installation, check whether the serrations of the upper and lower parts can be precisely aligned. If there is any deviation, adjust it promptly.

[0035] In use, rotate the placement frame 3 and the inclined support frame 4, and place the placement frame 3 onto the inclined support frame 4. Adjust the position of the inclined support frame 4 until the instrument platform 1 is level. Then, insert the two legs of the specific locking mechanism 5 into the insertion hole and the slotted hole 31 to fix the placement frame 3 and the inclined support frame 4, preventing accidental rotation, ensuring the stability of the mark during measurement, and thus ensuring measurement accuracy. When fixing, the matching bolts 52 can be used to tighten them, thereby fixing the legs in the slotted hole 31.

[0036] Mount the base of the measuring instrument onto the instrument platform 1 using the centering screw 12, and adjust the leveling screws of the measuring instrument to ensure that the measuring instrument is positioned level.

[0037] Example 2

[0038] like Figure 7 As shown, the difference between this embodiment and embodiment one is that the insertion holes on the inclined support frame 4 and the placement frame 3 are all round holes, and this embodiment is equipped with locking mechanisms 5 with different opening sizes. When in use, the corresponding locking mechanism 5 is selected according to the installation position of the inclined support frame 4 and the placement frame 3, so that the two legs of the locking mechanism 5 can be directly inserted into the insertion holes on the inclined support frame 4 and the placement frame 3, making the installation convenient and quick.

[0039] Example 3

[0040] like Figure 8 , 9 As shown, the difference between this embodiment and Embodiment 1 is that the inclined support frame 4 is located above the placement frame 3, which is suitable for situations where there is limited installation space, such as when placing or installing other facilities below the installation point of the forced centering sign or measuring equipment. The width of the front and rear extension of the placement frame 3 is smaller than the width of the U-shaped opening of the inclined support frame 4, and when overlapping, the placement frame 3 is located within the area enclosed by the inclined support frame 4. When folding, the inclined support frame 4 can be rotated downwards, the placement frame 3 can be rotated upwards, and then tied together with the straps 6.

Claims

1. A foldable forced centering sign suitable for limited spaces, characterized in that: It includes a placement frame (3) and an inclined support frame (4). The inclined support frame (4) is used to support or pull the placement frame (3) in a horizontal state. One side of the placement frame (3) and the inclined support frame (4) are rotatably installed on the tunnel wall via a hinged base (2), and the other side is detachably connected together. The placement frame (3) is provided with an instrument platform (1) for installing forced centering marks or measuring equipment. The instrument platform (1) is vertically provided with centering screws (12). The inclined support frame (4) is provided with an overlapping part for the placement frame (3) to rest against. The bottom of the placement frame (3) is provided with several adjustment slots (7) for adjusting the overlapping position. The overlapping part is provided with a clip for being inserted into the slot (7). The inclined support frame (4) and the placement frame (3) are also equipped with a locking mechanism (5) for fixing the overlapping state.

2. A foldable forced centering marker suitable for limited spaces according to claim 1, characterized in that: The bottom of the placement rack (3) is serrated, forming several adjustment slots (7), and the clips of the overlapping part are also serrated.

3. A foldable forced centering sign suitable for limited spaces according to claim 2, characterized in that: The inclined support frame (4) is located below the placement frame (3), the overlapping part is the end of the inclined support frame (4) on the other side, and the clip is also located on the end of the inclined support frame (4) on the other side.

4. A foldable forced centering marker suitable for limited spaces according to claim 1, characterized in that: The locking mechanism (5) includes two parallel legs. The inclined support frame (4) and the placement frame (3) are both provided with two insertion holes for the two legs of the locking mechanism (5) to be inserted. The two legs of the locking mechanism (5) are respectively inserted into the two insertion holes to lock the overlapping state.

5. A foldable forced centering sign suitable for limited spaces according to claim 4, characterized in that: The insertion hole of the placement rack (3) is a strip hole (31), and the support leg of the locking mechanism (5) for inserting into the strip hole (31) is a screw (51), and the screw (51) is equipped with a clamping nut (52), which is used to clamp the placement rack (3) against the locking mechanism (5).

6. A foldable forced centering marker suitable for limited spaces according to claim 1, characterized in that: The inclined support frame (4) is fixed with straps (6) for disassembling and folding the inclined support frame (4) and the placement frame (3).

7. A foldable forced centering marker suitable for limited spaces according to claim 1, characterized in that: The hinged base (2) is fixed to the abdominal wall by expansion bolts (21). The hinged base (2) is provided with hinged lugs (22) for installing the placement frame (3) or the inclined support frame (4). The placement frame (3) and the inclined support frame (4) are rotatably connected to the hinged lugs (22) by a rotating shaft (23).

8. A foldable forced centering marker suitable for limited spaces according to claim 1, characterized in that: The instrument platform (1) is provided with at least two levels (11), one of which extends forward and backward, and the other extends left and right.

9. A foldable forced centering marker suitable for limited spaces according to claim 8, characterized in that: The two levels (11) are arranged close to each other and in an L-shape; the instrument platform (1) is provided with a groove for mounting the level (11), and the level (11) is embedded in the instrument platform (1).

10. A foldable forced centering marker suitable for limited spaces according to claim 1, characterized in that: The instrument platform (1) is provided with a threaded hole for installing a centering screw (12), which extends from the bottom of the instrument platform (1) to the top of the instrument platform (1).

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