Positioning mechanism for civil air defense door frame installation

Abstract

The utility model relates to the technical field of building construction, in particular to a positioning mechanism for civil air defense door frame installation, which comprises a fixed cylinder and a movable column, a cantilever is arranged at the upper end of the movable column, the lower end of the movable column is inserted into the fixed cylinder and slidably connected with the fixed cylinder, a plumb line is arranged at one end of the cantilever far away from the movable column, and a plumb is fixedly connected to the bottom end of the plumb line. A movable pin is arranged on the side edge of the cantilever, a windproof plate is arranged on the side edge of the movable column, the upper end of the windproof plate is rotationally connected with the cantilever through the movable pin, a first magnetic attraction structure is arranged at the end, close to the movable column, of the cantilever, and a second magnetic attraction structure is arranged at the other end of the cantilever. When the perpendicularity of the door frame is judged, the position of the fixed cylinder is adjusted, then the windproof plate is overturned to the windward side of the plumb line, the windproof plate can shield the plumb line, the plumb line and the plumb are prevented from shaking due to wind power after falling down, and then the measurement precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a positioning mechanism for installing a civil air defense door frame. Background Art

[0002] Civil air defense doorframe walls refer to underground protective structures built separately to provide shelter for personnel and supplies, civil air defense command, and medical assistance during wartime, as well as basements built in conjunction with above-ground structures for air defense during wartime. Civil air defense projects are crucial for preventing sudden enemy attacks, effectively sheltering personnel and supplies, and preserving wartime potential. To ensure construction quality, precise measurements are required during installation of civil air defense doorframes, such as using measuring instruments to calibrate the doorframe's mounting points and using a level or plumb line to check and locate the doorframe's vertical alignment.

[0003] Among them, the plumb bob usually consists of a thin wire and a lead cone. A heavy object is hung at the lower end of the thin wire. Due to the effect of gravity, the heavy object will naturally droop, thereby ensuring that the thin wire remains consistent with the direction of gravity, that is, completely perpendicular to the ground. When installing the civil air defense door frame, a plumb bob can be used to check whether the door frame structure is completely perpendicular to the ground. The method is to place the plumb bob on the top of the object to be measured and observe whether the thin wire is completely in line with the surface of the object. Any deviation indicates that the surface is not completely vertical. The plumb bob is a simple, effective and commonly used measuring tool, but in actual use, due to the influence of outdoor weather, it will be subject to strong interference. For example, when encountering strong winds, the wind will blow on the wire, and the shaking of the wire will cause the plumb line to have a slight offset, affecting the accuracy of the measurement results. Utility Model Content

[0004] In response to the above problems, the present invention proposes a positioning mechanism for installing civil air defense door frames to solve the shortcomings of existing positioning mechanisms that when encountering strong winds, the wind will blow on the wire, and the shaking of the wire will cause a slight offset of the plumb line, affecting the accuracy of the measurement results.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a positioning mechanism for installing a civil air defense door frame, comprising a fixed cylinder and a movable column, wherein the lower end of the fixed cylinder is provided with a base, the upper end of the movable column is provided with a cantilever, the lower end of the movable column is inserted into the fixed cylinder and is slidably connected to the fixed cylinder, and a locking mechanism is provided at the connection between the movable column and the fixed cylinder;

[0006] A plumb line is provided at one end of the cantilever away from the movable column, and a plumb bob is fixedly connected to the bottom end of the plumb line;

[0007] A movable pin is provided on the side of the cantilever, and a windbreak plate is provided on the side of the movable column. The upper end of the windbreak plate is rotatably connected to the cantilever through a movable pin. A first magnetic structure is provided at one end of the cantilever close to the movable column for locking the windbreak plate on one side of the movable column, and a second magnetic structure is provided at the other end of the cantilever for locking the windbreak plate on one side of the plumb line.

[0008] A further improvement is that: limiting grooves are provided on two opposite side edges of the movable column, and the limiting grooves are slidably connected to guide edges provided on the inner side of the fixed cylinder.

[0009] A further improvement is that the locking mechanism includes multiple positioning holes opened on the side of the movable column, and the positioning holes are evenly arranged along the length of the movable column. The upper end of the fixed cylinder is equipped with at least one positioning bolt, which penetrates into the fixed cylinder and is threadedly connected to the positioning hole.

[0010] Further improvements are: the first magnetic structure includes a second magnet buckle and a fourth magnet buckle, the second magnet buckle is fixedly connected to one end of the cantilever close to the movable column, the fourth magnet buckle is placed on the upper end of the windproof plate, the fourth magnet buckle is fixedly connected to the side of the windproof plate facing the movable column, and the fourth magnet buckle is attracted to the second magnet buckle.

[0011] Further improvements are: the second magnetic structure includes a first magnet buckle and a third magnet buckle, the first magnet buckle is fixedly connected to the end of the cantilever away from the movable column, the third magnet buckle is placed on the upper end of the windproof plate, the third magnet buckle is fixedly connected to the side of the windproof plate away from the movable column, and the third magnet buckle is attracted to the first magnet buckle.

[0012] A further improvement is that a slot is provided at the lower end of the windproof plate.

[0013] A further improvement is that the base is fixedly connected to the fixed tube, the cantilever is fixedly connected to the movable column, a reinforcing rib is provided at the connection between the base and the fixed tube, and a rib is provided at the connection between the cantilever and the movable column.

[0014] Further improvement is that: side supports are provided on both sides of the base, the side supports are fixedly connected to the base, pins and counterweights are provided on the side supports, the pins are fixedly connected to the upper ends of the side supports, and the side supports are sleeved on the outside of the pins and slidably connected to the pins.

[0015] The beneficial effects of the utility model are:

[0016] The height of the cantilever and the movable column are adjustable, so that the plumb line and plumb bob can meet the positioning requirements of civil defense door frames of different heights, and have a wide range of applications.

[0017] The side of the movable column is equipped with a flippable windbreak. When judging the verticality of the door frame, adjust the position of the fixed tube, and then flip the windbreak to the windward side of the plumb line. The windbreak can block the plumb line to prevent the plumb line and the plumb bob from shaking due to wind after falling, thereby improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 It is a structural diagram of the movable column in the utility model.

[0020] Figure 2 It is a structural diagram of the plumb line in the utility model.

[0021] Figure 3 It is a structural diagram of the windproof plate in the utility model.

[0022] Figure 4 It is a structural diagram of the movable column in the utility model.

[0023] Figure 5 It is a structural diagram of the side support in the utility model.

[0024] Among them: 1. Base; 2. Fixed tube; 3. Cantilever; 4. Plumb line; 5. Plumb; 6. Movable column; 7. Limiting groove; 8. Guide edge; 9. Wind shield; 10. Movable pin; 11. First magnet buckle; 12. Second magnet buckle; 13. Slot; 14. Positioning hole; 15. Positioning bolt; 16. Third magnet buckle; 17. Fourth magnet buckle; 18. Side support; 19. Counterweight; 20. Pin rod. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] according to Figure 1 、 2As shown in Figures 3, 4, and 5, a positioning mechanism for installing a civil air defense door frame is proposed in this embodiment, including a fixed cylinder 2 and a movable column 6. The lower end of the fixed cylinder 2 is provided with a base 1, the upper end of the movable column 6 is provided with a cantilever 3, the lower end of the movable column 6 is inserted into the fixed cylinder 2 and is slidably connected to the fixed cylinder 2, and a locking mechanism is provided at the connection between the movable column 6 and the fixed cylinder 2;

[0027] A plumb line 4 is mounted on the end of the cantilever arm 3, away from the movable column 6. A plumb bob 5 is fixedly attached to the bottom of the plumb line 4. The plumb bob 5 utilizes the directionality of gravity to determine and measure the verticality of the civil air defense door frame during installation. A locking mechanism allows the height of the cantilever arm 3 and the movable column 6 to be adjusted, allowing the plumb line 4 and plumb bob 5 to meet the positioning requirements of civil air defense door frames of varying heights, thus providing a wide range of applications.

[0028] A movable pin 10 is provided on the side of the cantilever 3, and a windproof plate 9 is provided on the side of the movable column 6. The upper end of the windproof plate 9 is rotatably connected to the cantilever 3 through the movable pin 10. The cantilever 3 is provided with a first magnetic structure at one end close to the movable column 6 for locking the windproof plate 9 on one side of the movable column 6, and the other end of the cantilever 3 is provided with a second magnetic structure for locking the windproof plate 9 on one side of the plumb line 4.

[0029] A flippable windbreak plate 9 is provided on the side of the movable column 6. When judging the verticality of the door frame, adjust the position of the fixed tube 2, and then flip the windbreak plate 9 to the windward side of the plumb line 4. The windbreak plate 9 can block the plumb line 4 to prevent the plumb line 4 and the plumb bob 5 from shaking due to wind after falling, thereby improving the measurement accuracy.

[0030] The sliding connection between the movable column 6 and the fixed cylinder 2 is described below.

[0031] The movable column 6 has limit slots 7 formed on two opposing sides thereof, and the limit slots 7 are slidably connected to guide ribs 8 provided on the inner side of the fixed cylinder 2. The movable column 6 inserted into the fixed cylinder 2 is in a sliding connection with the fixed cylinder 2. When the movable column 6 slides up and down along the inner sidewall of the fixed cylinder 2, the guide ribs 8 on the inner side of the fixed cylinder 2 slide along the limit slots 7 on the outer side of the movable column 6. The guide ribs 8 cooperate with the limit slots 7 to limit the movable column 6, thereby improving the stability of the movable column 6 during height adjustment.

[0032] For the specific structure of the locking mechanism, please refer to the following description.

[0033] The locking mechanism includes a plurality of positioning holes 14 opened on the side of the movable column 6. The positioning holes 14 are evenly arranged along the length of the movable column 6. At least one positioning bolt 15 is installed at the upper end of the fixed cylinder 2. The positioning bolt 15 penetrates into the fixed cylinder 2 and is threadedly connected to the positioning hole 14.

[0034] To adjust the height of the cantilever 3, rotate the positioning bolt 15 and unscrew it from the corresponding positioning hole 14 on the outside of the fixed cylinder 2. The lock between the movable column 6 and the fixed cylinder 2 is released, and the movable column 6 is pulled to complete the height adjustment of the cantilever 3. To relock, screw the positioning bolt 15 back into the corresponding positioning hole 14.

[0035] About the first magnetic structure:

[0036] The first magnetic structure includes a second magnet buckle 12 and a fourth magnet buckle 17. The second magnet buckle 12 is fixedly connected to one end of the cantilever 3 close to the movable column 6. The fourth magnet buckle 17 is placed on the upper end of the wind shield 9. The fourth magnet buckle 17 is fixedly connected to the side of the wind shield 9 facing the movable column 6. The fourth magnet buckle 17 is attracted to the second magnet buckle 12.

[0037] When the wind shield 9 is retracted to one side of the movable column 6 , the fourth magnetic buckle 17 on the upper end of the wind shield 9 will be attracted to the second magnetic buckle 12 on the cantilever 3 to lock the wind shield 9 .

[0038] About the second magnetic structure:

[0039] The second magnetic structure includes a first magnet buckle 11 and a third magnet buckle 16. The first magnet buckle 11 is fixedly connected to the end of the cantilever 3 away from the movable column 6. The third magnet buckle 16 is placed on the upper end of the wind shield 9. The third magnet buckle 16 is fixedly connected to the side of the wind shield 9 away from the movable column 6. The third magnet buckle 16 is attracted to the first magnet buckle 11.

[0040] When the wind shield 9 is unfolded to one side of the plumb line 4 , the third magnet buckle 16 on the upper end of the wind shield 9 will be attracted to the first magnet buckle 11 on the cantilever 3 to lock the wind shield 9 .

[0041] In order to facilitate the construction workers to flip the windproof plate 9, a slot 13 is provided at the lower end of the windproof plate 9. When the windproof plate 9 is broken off from the side of the cantilever 3, a finger is buckled into the slot 13 and the windproof plate 9 is pulled.

[0042] In a preferred embodiment, the base 1 is fixedly connected to the fixed tube 2, the cantilever 3 is fixedly connected to the movable column 6, a reinforcing rib is provided at the connection between the base 1 and the fixed tube 2, and a rib is provided at the connection between the cantilever 3 and the movable column 6. The reinforcing rib is welded to the connection between the base 1 and the fixed tube 2, and the rib is also welded to the connection between the cantilever 3 and the movable column 6, thereby increasing the structural strength of the connection between the base 1 and the fixed tube 2 and the cantilever 3 and the movable column 6, thereby improving the stability of the entire frame.

[0043] In order to improve the stability of the fixed cylinder 2 when it is placed, it can also be arranged as follows: side supports 18 are provided on both sides of the base 1, and the side supports 18 are fixedly connected to the base 1. A pin rod 20 and a counterweight block 19 are provided on the side support 18, and the pin rod 20 is fixedly connected to the upper end of the side support 18. The side support 18 is sleeved on the outside of the pin rod 20 and is slidably connected to the pin rod 20.

[0044] A counterweight 19 is placed on the side support 18. The counterweight 19 can increase the weight of the bottom of the base 1 and lower the center of gravity of the positioning mechanism so that the positioning mechanism will not be blown down by the wind when in use.

[0045] How this application works:

[0046] The plumb bob 5 uses the directionality of gravity to determine and measure the verticality of the civil air defense door frame during installation. The locking mechanism adjusts the height of the cantilever 3 and the movable column 6, allowing the plumb line 4 and the plumb bob 5 to meet the positioning requirements of civil air defense door frames of different heights. The side of the movable column 6 is provided with a flippable windshield 9. When determining the verticality of the door frame, adjust the position of the fixed cylinder 2, and then flip the windshield 9 to the windward side of the plumb line 4. The windshield 9 can block the plumb line 4, preventing the plumb line 4 and the plumb bob 5 from shaking due to wind after falling, thereby improving measurement accuracy.

[0047] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A positioning mechanism for installing a civil air defense door frame, comprising a fixed cylinder (2) and a movable column (6), wherein the lower end of the fixed cylinder (2) is provided with a base (1), and the upper end of the movable column (6) is provided with a cantilever (3), characterized in that: The lower end of the movable column (6) is inserted into the fixed cylinder (2) and is slidably connected to the fixed cylinder (2), and a locking mechanism is provided at the connection between the movable column (6) and the fixed cylinder (2); A plumb line (4) is provided at one end of the cantilever (3) away from the movable column (6), and a plumb bob (5) is fixedly connected to the bottom end of the plumb line (4); A movable pin (10) is provided on the side of the cantilever (3), and a windbreak plate (9) is provided on the side of the movable column (6). The upper end of the windbreak plate (9) is rotatably connected to the cantilever (3) through the movable pin (10). The cantilever (3) is provided with a first magnetic structure at one end close to the movable column (6) for locking the windbreak plate (9) on one side of the movable column (6), and the other end of the cantilever (3) is provided with a second magnetic structure for locking the windbreak plate (9) on one side of the plumb line (4).

2. The positioning mechanism for installing a civil air defense door frame according to claim 1, characterized in that: Limiting grooves (7) are provided on two opposite side edges of the movable column (6), and the limiting grooves (7) are slidably connected to guide edges (8) provided on the inner side of the fixed cylinder (2).

3. The positioning mechanism for installing a civil air defense door frame according to claim 1, characterized in that: The locking mechanism comprises a plurality of positioning holes (14) provided on the side of the movable column (6), wherein the positioning holes (14) are evenly arranged along the length direction of the movable column (6), and at least one positioning bolt (15) is provided at the upper end of the fixed cylinder (2), wherein the positioning bolt (15) penetrates into the fixed cylinder (2) and is threadedly connected to the positioning hole (14).

4. The positioning mechanism for installing a civil air defense door frame according to claim 1, characterized in that: The first magnetic attraction structure includes a second magnet buckle (12) and a fourth magnet buckle (17), wherein the second magnet buckle (12) is fixedly connected to one end of the cantilever (3) close to the movable column (6), and the fourth magnet buckle (17) is placed on the upper end of the windproof plate (9). The fourth magnet buckle (17) is fixedly connected to the side of the windproof plate (9) facing the movable column (6), and the fourth magnet buckle (17) is attracted to the second magnet buckle (12).

5. The positioning mechanism for installing a civil air defense door frame according to claim 4, characterized in that: The second magnetic attraction structure includes a first magnet buckle (11) and a third magnet buckle (16), wherein the first magnet buckle (11) is fixedly connected to one end of the cantilever (3) away from the movable column (6), and the third magnet buckle (16) is placed on the upper end of the windproof plate (9), and the third magnet buckle (16) is fixedly connected to the side of the windproof plate (9) away from the movable column (6), and the third magnet buckle (16) is attracted to the first magnet buckle (11).

6. The positioning mechanism for installing a civil air defense door frame according to claim 1, characterized in that: A slot (13) is provided at the lower end of the windproof plate (9).

7. The positioning mechanism for installing a civil air defense door frame according to claim 1, characterized in that: The base (1) is fixedly connected to the fixed cylinder (2), the cantilever (3) is fixedly connected to the movable column (6), a reinforcing rib is provided at the connection between the base (1) and the fixed cylinder (2), and a rib is provided at the connection between the cantilever (3) and the movable column (6).

8. The positioning mechanism for installing a civil air defense door frame according to claim 1, characterized in that: Side supports (18) are provided on both sides of the base (1), and the side supports (18) are fixedly connected to the base (1). A pin rod (20) and a counterweight (19) are provided on the side supports (18), and the pin rod (20) is fixedly connected to the upper end of the side support (18). The side support (18) is sleeved on the outside of the pin rod (20) and is slidably connected to the pin rod (20).

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