Opening and closing device for reserved hole of construction platform

Abstract

The utility model discloses an opening and closing device for a reserved hole of a construction platform. The opening and closing device comprises a supporting piece, a bending piece and a movable cover plate. The two ends of the supporting piece are fixed to the edge of the reserved hole so as to be arranged in the reserved hole in a crossing mode. The bending piece comprises a first bending piece and a second bending piece; the first bending piece and the second bending piece are respectively provided with a first end part and a second end part which are opposite to each other; the first end parts of the first bending piece and the second bending piece are rotationally connected to the supporting piece, so that the first bending piece and the second bending piece have rotational degrees of freedom in a vertical plane; and the second end parts of the first bending piece and the second bending piece are hinged to the bottom of the movable cover plate. The spatial position relation of the first bending piece and the second bending piece at the second end part is the same as that at the first end part; the first bending piece and the second bending piece have the same equivalent length; and the first bending piece and the second bending piece are bent towards the opening direction of the movable cover plate. The device avoids kicking risks when in a closed state and provides a hardware basis for compact placement after opening.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment for building engineering, and in particular to an opening and closing device for a reserved opening in a construction platform. Background Technology

[0002] In construction engineering, the walkways of protective platforms are important passageways for construction workers. To meet the needs of specific work processes, such as allowing workers to enter the space below the platform for tasks like locking the formwork base or removing side formwork, pre-reserved openings are made at corresponding locations on the platform. To ensure safe passage and the integrity of the platform, these openings must be covered with movable covers under normal circumstances. The traditional solution is to weld hinges directly to the edge of the opening and install a movable cover (usually made of 2.5mm thick checkered steel plate) on the hinge. When it is necessary to enter the space below for work, the worker lifts this hinged cover.

[0003] However, this traditional method has significant drawbacks. First, when the cover is closed and in its normal passageway state, the hinges welded to the platform inevitably protrude upwards from the walkway surface. People walking on the walkway are highly susceptible to tripping over these protruding hinges, posing a significant safety risk. Second, when the cover is opened, due to the hinge structure, it often only hovers at a certain angle above the opening, unable to be stably and horizontally placed beside the reserved opening. This not only occupies valuable passageway or work space but also hinders the passage, work, and material stacking of surrounding workers, affecting construction efficiency. Utility Model Content

[0004] The main technical problem to be solved by this utility model is to provide an opening and closing device for a reserved opening in a construction platform, which avoids the risk of kicking when closed and provides a hardware basis for compact placement when opened.

[0005] To solve the above-mentioned technical problems, this utility model provides an opening and closing device for a reserved opening in a construction platform, including a support component, a bending component, and a movable cover plate;

[0006] The two ends of the support member are fixed to the edge of the reserved opening so as to span the reserved opening; the bending member includes at least a first bending member and a second bending member; the first bending member and the second bending member each have a first end and a second end; the first end of the first bending member and the second bending member are rotatably connected to the support member so as to have rotational freedom in the vertical plane; the second end of the first bending member and the second bending member are hinged to the bottom of the movable cover plate;

[0007] The spatial positional relationship between the first bent component and the second bent component at the second end is the same as that at the first end; the first bent component and the second bent component have equal equivalent lengths;

[0008] The first bending member and the second bending member are bent in the opening direction of the movable cover plate.

[0009] In a preferred embodiment, the first bending member and the second bending member are staggered along the length of the support member.

[0010] In a preferred embodiment, the support member is at least configured with a first clearance through hole and a second clearance through hole offset in the length direction; the first end of the first bent member is rotatably connected to the first clearance through hole; and the first end of the second bent member is rotatably connected to the second clearance through hole.

[0011] In a preferred embodiment, the connection points of the first bending member, the second bending member, and the support member are horizontally spaced along the spanning direction of the support member.

[0012] In a preferred embodiment, the first bending member and the second bending member are respectively connected to two sides of the support member.

[0013] In a preferred embodiment, the bending angles of the first bending member and the second bending member are configured such that when the first bending member and the second bending member move to abut against the top of the side member of the reserved opening, the bending segment of the first bending member and the second bending member near the second end is horizontal.

[0014] In a preferred embodiment, the movable cover plate has a first hinge portion fixed at its bottom, and the first or second bent member has a second hinge portion at its second end; either the first hinge portion or the second hinge portion is constructed as a pivot, and the other is constructed as a bushing; the first hinge portion and the second hinge portion are rotatably connected through the shaft hole cooperation between the pivot and the bushing.

[0015] In a preferred embodiment, the first bending member, the second bending member, and the movable cover plate are connected in the same way.

[0016] In a preferred embodiment, the support member is made of steel plate or steel rod.

[0017] In a preferred embodiment, the movable cover plate is made of steel plate or composite plate.

[0018] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0019] The device provided by this utility model has significant technical advantages in terms of structural layout and movement effect. When the movable cover is in the closed state, the aforementioned bending component, support base, and various connecting components are all located in the concealed space below the movable cover. The upper surface of the movable cover has no protruding parts and remains flush with the construction platform, fundamentally eliminating the safety hazard of construction personnel tripping. Secondly, in the open state, due to the ingenious bending design of the bending component, it successfully avoids the side components of the opening, and the movable cover can be stably flipped onto the construction platform on the side of the opening. It occupies little space, has a compact layout, and will not hinder normal operations or material stacking around the opening. In addition, the application of the parallelogram structure ensures that the movable cover maintains a stable horizontal shape at the target position and ensures smooth and reliable operation. The device has a simple structure, is easy to manufacture, install, and operate, and provides an optimal solution for the opening and closing design of reserved openings on construction platforms. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the device when the movable cover is closed in an embodiment of the present invention, taken from a first perspective.

[0021] Figure 2 This is a perspective view of the device when the movable cover is closed in an embodiment of the present invention, from a second perspective.

[0022] Figure 3 This is a three-dimensional schematic diagram of the device during the flipping process of the movable cover plate in the embodiment of this utility model from a first perspective.

[0023] Figure 4 This is a perspective view of the device from a second angle when the movable cover plate is located at the target position in an embodiment of the present invention.

[0024] Figure 5 This is a side view of the device when the movable cover is closed in an embodiment of this utility model;

[0025] Figure 6 This is a side view of the device during the flipping process of the movable cover plate in an embodiment of this utility model;

[0026] Figure 7 This is a side view of the device when the movable cover is in the target position in an embodiment of the present invention;

[0027] Figure 8 This is a top view of the device when the movable cover is closed in an embodiment of this utility model.

[0028] The markings in the figure are as follows: 1-support member, 11-first clearance through hole, 12-second clearance through hole, 2-bent member, 21-first bent member, 22-second bent member, 23-first end, 24-second end, 3-movable cover plate, 31-first connection point, 32-second connection point, 4-reserved opening, 5-side component. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted 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; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] like Figures 1 to 8 As shown, this embodiment of the utility model provides an opening and closing device for a reserved opening in a construction platform, which is used for opening and closing the movable cover plate 3 at the reserved opening in the construction platform. The device includes a support member 1, a bending member 2, and a movable cover plate 3.

[0033] The support member 1 serves as the basic support structure for the device. Both ends of the support member 1 are fixed to the side members 5 at the edge of the reserved opening 4, spanning across the reserved opening 4. Preferably, to ensure sufficient support rigidity and load-bearing capacity, the support member 1 is made of steel plates or structural steel members (such as square steel pipes or I-beams) with a certain thickness and strength. At least two clearance through holes are spaced apart along the spanning direction (i.e., the length direction) of the support member 1, respectively defined as the first clearance through hole 11 and the second clearance through hole 12. Preferably, the first clearance through hole 11 and the second clearance through hole 12 are spaced apart horizontally.

[0034] As a movement guide for the movable cover plate 3, the bending member 2 assembly includes at least two independent bending members 2, namely a first bending member 21 and a first bending member 22. Each bending member 2 has a first end 23 and a second end 24. The first end 23 of the bending member 2 is rotatably connected to the support member 1 through a corresponding clearance through hole. Specifically, the first end 23 of the first bending member 21 is rotatably connected to the first clearance through hole 11 using a connecting element such as a pin, snap ring, or nut, so that the first bending member 21 can rotate freely in the vertical plane with the first clearance through hole 11 as the center. The second end 24 of the first bending member 22 is rotatably connected to the second clearance through hole 12 in the same manner. In this embodiment, to reduce interference during rotation, the first bending member 21 and the first bending member 22 are respectively connected to two sides of the support member 1.

[0035] The movable cover plate 3 is used to cover the opening and is typically a steel plate or composite plate slightly larger than the reserved opening 4. The second end of the first bent member 21 is hinged to the first connection point 31 at the bottom of the movable cover plate 3. Similarly, the second end 24 of the first bent member 22 is hinged to the second connection point 32 at the bottom of the movable cover plate 3. As a mature prior art, there are various ways to hinge the first bent member 21, the first bent member 22, and the movable cover plate 3. The hinge method in this embodiment will be described using the first bent member 21 as an example. Referring to the hinge shaft structure, the movable cover plate 3 is provided with a first hinge part at the first connection point 31, and the first bent member 21 is provided with a second hinge part at the second end 24. Either the first hinge part or the second hinge part is constructed as a pivot, while the other is constructed as a bushing, and the two achieve relative rotation through the engagement of the shaft hole. In this embodiment, the hinge method between the first bent member 22 and the movable cover plate 3 is the same as that of the first bent member 21.

[0036] The conditions for setting the first connection point 31 and the second connection point 32 should be met: the relative spatial position of the first bent component 21 and the first bent component 22 at the second end 24 should match their relative spatial position at the first end 23. Furthermore, the first bent component 21 and the first bent component 22 should have at least the same equivalent length, which is the net distance from the first end 23 to the second end 24 of the bent component 2. In this way, the first bent component 21 and the first bent component 22 not only have parallel rotation planes to ensure smooth rotation of the movable cover plate 3, but also, from a horizontal projection perspective, the first clearance through hole 11, the second clearance through hole 12, the first point, and the second point constitute a virtual parallelogram with variable height. Since the first clearance through hole 11 and the second clearance through hole 12 are at the same height, the movable cover plate 3 remains horizontal regardless of how the first bent component 21 and the first bent component 22 rotate synchronously.

[0037] It should be noted that keeping the movable cover plate 3 horizontal is only for achieving a better movement effect of the device, and is not a necessary technical feature for solving the above-mentioned technical problems. In other embodiments, the first bending member 21 and the first bending member 22 are arranged opposite to the support member 1. In other words, the vertical projections of the first bending member 21 and the first bending member 22 on the vertical plane where the support member 1 is located coincide. Although this structure cannot ensure that the movable cover plate 3 remains horizontal when flipping, after the movable cover plate 3 reaches the target position, it can still be relatively fitted with the side construction platform through simple manual intervention. Therefore, this structure still provides a hardware basis for achieving compact placement of the movable cover plate 3.

[0038] The first bending member 21 and the first bending member 22 bend in the opening direction of the movable cover plate 3. When the operator lifts the movable cover plate 3, the first bending member 21 and the first bending member 22 rotate around their connection points on the support member 1, pushing the movable cover plate 3 upward. As the height of the movable cover plate 3 increases, the first bending member 21 and the first bending member 22 gradually unfold. When the movable cover plate 3 is flipped to near the target position, the bending member 21 bends around the side member 5 of the reserved opening 4, avoiding the side member 5 from obstructing the movement of the bending member 2, so that the movable cover plate 3 can be relatively fitted (not absolutely fitted due to the obstruction of the bending rod) on the side construction platform after reaching the target position. To achieve a better fit for the movable cover 3, the bend angle of the first bending member 21 or the first bending member 22 has the following characteristics: when the first bending member 21 or the first bending member 22 moves to the target position to abut against the top of the side member 5, the bend segment of the first bending member 21 or the first bending member 22 near the second end 24 is horizontal. The aforementioned target position is the position when the movable cover 3 is fully opened.

[0039] In summary, the technical advantages of the device are mainly reflected in its structural layout and movement effect. When the movable cover plate 3 is in the closed state, the aforementioned bending component 2, support base, and various connecting components are all located in the concealed space below the movable cover plate 3. The upper surface of the movable cover plate 3 has no protruding parts and remains flush with the construction platform, fundamentally eliminating the safety hazard of construction personnel tripping. Secondly, in the open state, due to the ingenious bending design of the bending component 2, it successfully avoids the side component 5 of the opening, and the movable cover plate 3 can be stably flipped onto the construction platform on the side of the opening. It occupies little space, has a compact layout, and will not hinder normal operations or material stacking around the opening. In addition, the application of the parallelogram structure ensures that the movable cover plate 3 maintains a stable horizontal shape at the target position and ensures smooth and reliable operation. The device has a simple structure, is easy to manufacture, install, and operate, and provides an optimal solution for the opening and closing design of the reserved opening 4 on the construction platform.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Any technically equivalent modifications made based on the content of this specification shall fall within the protection scope of the present invention.

Claims

1. A device for opening and closing a reserved opening in a construction platform, characterized in that: Includes support components, bending components, and movable cover plates; The two ends of the support member are fixed to the edge of the reserved opening so as to span the reserved opening; the bending member includes at least a first bending member and a second bending member; the first bending member and the second bending member each have a first end and a second end; the first end of the first bending member and the second bending member are rotatably connected to the support member so as to have rotational freedom in the vertical plane; the second end of the first bending member and the second bending member are hinged to the bottom of the movable cover plate; The spatial positional relationship between the first bending member and the second bending member at the second end is the same as that at the first end; the first bending member and the second bending member have equal equivalent lengths; the first bending member and the second bending member are bent in the opening direction of the movable cover.

2. The opening and closing device for a reserved opening in a construction platform according to claim 1, characterized in that: The first bent component and the second bent component are staggered along the length of the support component.

3. The opening and closing device for a reserved opening in a construction platform according to claim 2, characterized in that: The support member is at least constructed with a first clearance through hole and a second clearance through hole offset in the length direction; the first end of the first bent member is rotatably connected to the first clearance through hole; the first end of the second bent member is rotatably connected to the second clearance through hole.

4. A device for opening and closing a reserved opening in a construction platform according to any one of claims 2 or 3, characterized in that: The connection points of the first bending member, the second bending member and the support member are arranged horizontally at intervals along the spanning direction of the support member.

5. The opening and closing device for a reserved opening in a construction platform according to claim 1, characterized in that: The first bending member and the second bending member are respectively connected to the two sides of the support member.

6. The opening and closing device for a reserved opening in a construction platform according to claim 1, characterized in that: The bending angles of the first bending member and the second bending member are configured such that when the first bending member and the second bending member move to abut the top of the side member of the reserved opening, the bending segment of the first bending member and the second bending member near the second end is horizontal.

7. The opening and closing device for a reserved opening in a construction platform according to claim 1, characterized in that: The movable cover plate has a first hinge portion fixed at the bottom, and the first or second bent member has a second hinge portion at the second end; either the first hinge portion or the second hinge portion is constructed as a rotating shaft, and the other is constructed as a bushing; the first hinge portion and the second hinge portion are rotatably connected through the shaft hole cooperation between the rotating shaft and the bushing.

8. The opening and closing device for a reserved opening in a construction platform according to claim 7, characterized in that: The first bending component, the second bending component, and the movable cover plate are connected in the same way.

9. The opening and closing device for a reserved opening in a construction platform according to claim 1, characterized in that: The support components are made of steel plates or steel rods.

10. The opening and closing device for a reserved opening in a construction platform according to claim 1, characterized in that: The movable cover plate is made of steel plate or composite plate.

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