Novel safe labor-saving hole cover plate

Abstract

The utility model relates to the technical field of the hanging hole cover plate, provide a new type of safe labor-saving hanging hole cover plate which is convenient and labor-saving, occupies small hanging hole space, the guardrail height is in the safe height position when opening, the structure is stable and compact and the manufacturing cost is low, the new type of safe labor-saving hanging hole cover plate comprises: the frame fixed in the periphery of the hanging hole, front and back telescopic folding guardrails, left and right opening and closing folding cover plates. The first folding cover plate of the left and right opening and closing folding cover plates is connected together through the gear and lever counterweight device on the counterweight power installation seat of the frame fixed in the periphery of the hanging hole. The upper fixed seat of the hydraulic support rod on the first folding cover plate of the left and right opening and closing folding cover plates is connected with the lower fixed seat of the hydraulic support rod on the frame fixed in the periphery of the hanging hole through the hydraulic support rod, the first folding cover plate of the left and right opening and closing folding cover plates and the second folding cover plate are connected together through the pin shaft, the support guide wheels at both ends of the second folding cover plate are always on the roller support rail of the left and right opening and closing folding cover plate.

Description

Technical Field

[0001] This utility model relates to the technical field of lifting hole cover plates, and discloses a new type of safe and labor-saving lifting hole cover plate. Background Technology

[0002] In some construction projects, such as power plants and large warehousing centers, multi-story buildings typically have hoisting holes on each floor for lifting large equipment or bulk goods. These hoisting holes must be equipped with hoisting hole covers (which function as covers when closed and safety railings when open). Currently, conventional hoisting hole covers have several drawbacks, including occupying too much space within the hoisting hole, requiring excessive railing height when open, being laborious to open or close, and having a complex structure. Summary of the Invention

[0003] The purpose of this utility model is to improve upon the many technical defects of the existing system and provide a new type of safe and labor-saving lifting hole cover that is easy to operate and saves effort, occupies little space in the lifting hole, has a guardrail height at a safe height when opened, has a stable and compact structure, and has low manufacturing cost.

[0004] This utility model is achieved through the following technical solution: a novel safe and labor-saving lifting hole cover plate, characterized in that it includes: a frame fixed around the lifting hole, a front and rear telescopic folding guardrail, and a left and right opening and closing folding cover plate. The front and rear telescopic folding guardrail is connected to the front and rear fixed frames of the frame through a hinge structure. The front and rear telescopic folding guardrail can be manually pulled open to a predetermined height and can be flush with the ground when retracted. The left and right opening and closing folding cover plate is connected to the frame around the lifting hole through a gear meshing structure and realizes opening and closing. The lower gear is connected to a lever counterweight device, and the upper gear is connected to the lower crossbeam of the first folding cover plate of the left and right opening and closing folding cover plate. The first folding cover plate and the second folding cover plate of the left and right opening and closing folding cover plate are connected by a hinge structure.

[0005] The novel safe and labor-saving lifting hole cover is characterized in that: the frame fixed around the lifting hole has evenly distributed counterweight assist mounting seats on the left and right inner sides and hydraulic support rod lower fixing seats for supporting the cover plate; several evenly distributed hinged flip-up kick plates are provided on the front, back, left and right outer sides of the frame; telescopic folding guardrail support seats and roller support tracks for opening and closing the left and right folding cover plates are provided on the front and back inner sides of the frame; and the vertical tube of the telescopic folding guardrail support seat has an elongated hole.

[0006] The novel safe and labor-saving lifting hole cover is characterized in that: the front and rear telescopic folding guardrail is hinged, and the left and right ends of the vertically telescopic horizontal guardrail are provided with guide wheels and telescopic locking pins for fixing. The guide wheels are installed in the support tube of the front and rear telescopic folding guardrail. The lower end of the support tube of the front and rear telescopic folding guardrail is provided with a limiting shaft. The limiting shaft is installed in the elongated hole provided in the support tube of the telescopic folding guardrail support seat. The support tube of the front and rear telescopic folding guardrail can be folded at 90 degrees.

[0007] The novel safe and labor-saving lifting hole cover is characterized in that: the left-right opening and closing folding cover includes a first folding cover, a second folding cover, and a lever counterweight device; the first folding cover of the left-right opening and closing folding cover is connected to the lever counterweight device via a gear on the counterweight assist mounting seat fixed on the frame around the lifting hole; the upper fixing seat of the hydraulic support rod on the first folding cover of the left-right opening and closing folding cover is connected to the lower fixing seat of the hydraulic support rod fixed on the frame around the lifting hole via the hydraulic support rod; the first folding cover and the second folding cover are connected together by a pin; and the support guide rollers at both ends of the second folding cover are always on the roller support track of the left-right opening and closing folding cover.

[0008] The novel safe and labor-saving lifting hole cover is characterized in that: the first and second folding covers of the left and right opening folding cover are locked together by a gear and rack transmission guide device when the cover is closed; the first folding cover of the left and right opening folding cover is provided with evenly distributed gear and rack transmission guide devices; the second folding cover of the left and right opening folding cover is provided with a rack guide limiting locking hole; the first folding cover of the left and right opening folding cover is provided with a flexible drag chain for dragging; the first folding cover of the left and right opening folding cover is provided with an adjustment block to prevent gravity-induced flexural rebound; each of the two lower ends of the second folding cover of the left and right opening folding cover is provided with a supporting guide roller; the second folding cover of the left and right opening folding cover is locked together by a gear and rack transmission guide device when the cover is closed; and an anti-gravity-induced flexural rebound rod is provided at the middle position of the second folding cover of the left and right opening folding cover.

[0009] The beneficial effects of this new type of safe and labor-saving lifting hole cover can be understood from the above: First: The lever counterweight device is set up and the counterweight can be adjusted according to the weight of the cover plate, which greatly reduces the difficulty and impact of opening and closing the cover plate.

[0010] Second: The lever counterweight device and hydraulic support rod are parallel to the cover plate and vertical below the cover plate when the cover plate is open, which greatly reduces the space occupied by the lifting hole.

[0011] Third: The left-right split-opening folding cover structure ensures that the height of the cover in the open state meets the specified safety requirements. The supporting guide rollers on the second folding cover are always positioned on the roller support tracks on the inner front and rear sides of the frame, ensuring the stability of the cover during opening and closing.

[0012] Fourth: The hydraulic support rods evenly distributed on the first folding cover plate not only play a role in gravity balance during opening and closing, but also play a supporting role in the closed state, preventing the first folding cover plate from flexibly sagging in the middle.

[0013] Fifth: The anti-gravity flexural device installed between the first and second folding covers of the left and right opening folding covers is designed to prevent the second folding cover from flexing and sagging in the middle.

[0014] Sixth: The gear and rack transmission guide device set between the left and right folding covers realizes the locking function between the covers, which greatly enhances the overall load-bearing capacity of the covers. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention in the open state; Figure 2 This is a three-dimensional schematic diagram of the present invention in the closed state; Figure 3 This is the front view of the present invention in the open state; Figure 4 This is a bottom view of the present invention in its open state; Figure 5 This is a left view of the present invention in the open state; Figure 6 This is the front view of the present invention in the closed state; Figure 7 This is a bottom view of the present invention in its closed state; Figure 8 This is a left view of the present invention in its closed state; Figure 9 This is a three-dimensional schematic diagram of the frame around the hanging hole of this utility model (1); In the figure, (1) the frame around the hoisting hole, (2) the front and rear telescopic folding guardrail, (3) the left and right opening and closing folding cover plate, (11) the counterweight assist mounting base, (12) the lower fixing base of the hydraulic support rod, (13) the kick plate, (14) the telescopic folding guardrail support base, (15) the roller support track, (16) the long hole, (21) the horizontal upper guardrail, (22) the guide wheel, (23) the telescopic locking pin, (24) the support riser, and (25) the support riser. Limiting shaft, (31) first folding cover plate, (32) second folding cover plate, (33) lever counterweight device, (111) gear, (311) upper fixed seat of hydraulic support rod, (312) hydraulic support rod, (321) pin shaft, (322) support guide roller, (323) gear and rack transmission guide device, (324) rack guide limiting locking hole, (313) flexible drag chain, (314) springback adjustment block, (325) springback rod. Detailed implementation method:

[0016] To clearly illustrate the technical features of this solution, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings: The new type of safe and labor-saving lifting hole cover plate includes: a frame (1) fixed around the lifting hole, a front and rear telescopic folding guardrail (2), and a left and right opening and closing folding cover plate (3). The front and rear telescopic folding guardrail (2) is connected to the front and rear fixed frames of the frame (1) through a hinge structure. The front and rear telescopic folding guardrail (2) can be manually pulled open to a predetermined height and can be flush with the ground when retracted. The left and right opening and closing folding cover plate (3) is connected to the frame (1) around the lifting hole through a gear meshing structure and realizes opening and closing. The lower gear is connected to the lever counterweight device (33), and the upper gear is connected to the lower crossbeam of the first folding cover plate (31) of the left and right opening and closing folding cover plate (3). The first folding cover plate (31) and the second folding cover plate (32) of the left and right opening and closing folding cover plate (3) are connected through a hinge structure.

[0017] The novel safe and labor-saving lifting hole cover plate is characterized in that: the frame (1) fixed around the lifting hole is provided with evenly distributed counterweight assist mounting seats (11) on the left and right inner sides and hydraulic support rod lower fixing seats (12) for supporting the cover plate; several evenly distributed hinged flip-up kick plates (13) are provided on the front, back, left and right outer sides of the frame (1); telescopic folding guardrail support seats (14) and roller support rails (15) for opening and closing the cover plate are provided on the front and back inner sides of the frame; and the vertical tube of the telescopic folding guardrail support seat (14) is provided with a long strip hole (16).

[0018] The novel safety and labor-saving lifting hole cover plate is characterized in that: the front and rear telescopic folding guardrail (2) is hinged, and the horizontal horizontal guardrail (21) that can be vertically telescopic is provided with guide wheels (22) and telescopic locking pins (23) for fixing at the left and right ends. The guide wheels (22) are installed in the support tube (24) of the front and rear telescopic folding guardrail. The lower end of the support tube (24) of the front and rear telescopic folding guardrail (2) is provided with a limiting shaft (25). The limiting shaft (25) is installed in the elongated hole (16) provided in the tube of the support seat (14) of the telescopic folding guardrail. The support tube (24) of the front and rear telescopic folding guardrail (2) can be folded at 90 degrees.

[0019] The novel safety and labor-saving lifting hole cover plate is characterized in that: the left and right opening folding cover plate (3) includes a first folding cover plate (31), a second folding cover plate (32), and a lever counterweight device (33). The first folding cover plate (31) of the left and right opening folding cover plate (3) is connected to the lever counterweight device (33) through a gear (111) on the counterweight assist mounting seat (11) fixed on the frame (1) around the lifting hole. The first folding cover plate (3) of the left and right opening folding cover plate (3) is connected to the lever counterweight device (33) through a gear (111) on the counterweight assist mounting seat (11) fixed on the frame (1) around the lifting hole. The upper fixed seat (311) of the hydraulic support rod on 31) is connected to the lower fixed seat (12) of the hydraulic support rod on the frame (1) fixed around the lifting hole through the hydraulic support rod (312). The first folding cover (31) and the second folding cover (32) of the left and right opening and closing folding cover (3) are connected together by the pin (321). The support guide rollers (322) at both ends of the second folding cover (32) are always on the left and right opening and closing folding cover roller support track (15).

[0020] The novel safety and labor-saving lifting hole cover is characterized in that: the first folding cover (31) and the second folding cover (32) of the left and right opening folding cover (3) are locked together by a gear and rack transmission guide device (323) when the cover is closed; the first folding cover (31) of the left and right opening folding cover (3) is provided with evenly distributed gear and rack transmission guide devices (323); the second folding cover (32) of the left and right opening folding cover (3) is provided with a rack guide limiting locking hole (324); and the first folding cover (31) of the left and right opening folding cover (3) is provided with a drag bar. Using a flexible cable chain (313), the first folding cover (31) of the left and right opening folding cover (3) is provided with an adjustment block (314) to prevent gravity-induced flexural rebound. The lower ends of the second folding cover (32) of the left and right opening folding cover (3) are each provided with a support guide roller (322). When the cover is closed, the second folding cover (32) of the left and right opening folding cover (3) is locked by a gear and rack transmission guide device (323). The middle position of the second folding cover (32) of the left and right opening folding cover (3) is provided with a rod (325) to prevent gravity-induced flexural rebound.

Claims

1. A novel, safe, and labor-saving lifting hole cover, characterized in that: include: The system includes a frame fixed around the lifting hole, front and rear telescopic folding guardrails, and left and right opening folding covers. The front and rear telescopic folding guardrails are connected to the front and rear fixed frames of the frame via hinges. The front and rear telescopic folding guardrails can be manually pulled open to a predetermined height and retracted to be flush with the ground. The left and right opening folding covers are connected to the frame around the lifting hole via a gear meshing structure and can be opened and closed. The lower gear is connected to a lever counterweight device, and the upper gear is connected to the lower crossbeam of the first folding cover of the left and right opening folding covers. The first folding cover and the second folding cover of the left and right opening folding covers are connected via hinges.

2. The novel safe and labor-saving lifting hole cover plate according to claim 1, characterized in that: The frame fixed around the hoisting hole has evenly distributed counterweight assist mounting seats on the left and right inner sides and hydraulic support rod lower fixing seats for supporting the cover plate. Several evenly distributed hinged flip-up kick plates are provided on the front, back, left and right outer sides of the frame. The front and back inner sides of the frame have telescopic folding guardrail support seats and roller support tracks for opening and closing the left and right folding cover plates. The vertical tube of the telescopic folding guardrail support seat has an elongated hole.

3. The novel safe and labor-saving lifting hole cover plate according to claim 1, characterized in that: The aforementioned telescopic folding guardrail is hinged, and the horizontal guardrail that can be vertically extended and retracted is equipped with guide wheels and telescopic locking pins for fixing at the left and right ends. The guide wheels are installed inside the support tube of the telescopic folding guardrail, and the lower end of the support tube of the telescopic folding guardrail is equipped with a limiting shaft. The limiting shaft is installed in the elongated hole provided in the support tube of the telescopic folding guardrail support seat. The support tube of the telescopic folding guardrail can be folded at 90 degrees.

4. The novel safe and labor-saving lifting hole cover plate according to claim 1, characterized in that: The left-right opening and closing folding cover includes a first folding cover, a second folding cover, and a lever counterweight device. The first folding cover is connected to the lever counterweight device via a gear on the counterweight assist mounting seat fixed to the frame around the lifting hole. The upper fixing seat on the hydraulic support rod of the first folding cover is connected to the lower fixing seat on the hydraulic support rod fixed to the frame around the lifting hole via the hydraulic support rod. The first folding cover and the second folding cover are connected together by a pin. The support guide rollers at both ends of the second folding cover are always on the roller support track of the left-right opening and closing folding cover.

5. The novel safe and labor-saving lifting hole cover plate according to claim 1, characterized in that: The first and second folding covers of the left-right opening and closing folding cover are locked together by a gear and rack transmission guide device when the covers are closed. The first folding cover of the left-right opening and closing folding cover is provided with evenly distributed gear and rack transmission guide devices. The second folding cover of the left-right opening and closing folding cover is provided with rack guide limiting locking holes. The first folding cover of the left-right opening and closing folding cover is provided with a flexible drag chain for dragging. The first folding cover of the left-right opening and closing folding cover is provided with an adjustment block to prevent gravity-induced flexural rebound. Each side of the lower end of the second folding cover of the left-right opening and closing folding cover is provided with a support guide roller. The second folding cover of the left-right opening and closing folding cover is locked together by a gear and rack transmission guide device when the covers are closed. The second folding cover of the left-right opening and closing folding cover is provided with a rod to prevent gravity-induced flexural rebound at the middle position.

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