Elevator car top guardrail with four-sided protection

Abstract

This utility model proposes a four-sided protective car top railing for elevators. The car top railing is installed on the top of the elevator car and includes a rear railing, two side railings, and a front railing. The two side railings and the rear railing are respectively located on the sides and rear of the car. The two side railings and the rear railing are both straight frame structures and are connected to the top of the car by connectors. The front railing is located on the front of the car and, together with the rear railing and the two side railings, forms a protective space. The front railing is equipped with a removable crossbar for entry and exit, and the removable crossbar is detachable from the front railing. The railing is a four-sided protective structure. The rear railing and the two side railings can adopt conventional railing structures. The front railing has a removable crossbar. The open portion of the removable crossbar can be used for personnel entry and exit. After the entry and exit are completed, the removable crossbar can be reinstalled to maintain an effective protective space, thus complying with safety design specifications.

Description

Technical Field

[0001] This utility model relates to an improvement of the safety device for elevator maintenance, specifically a car top guardrail for four-sided protection of elevators. Background Technology

[0002] According to the "Elevator Supervision and Periodic Inspection Rules TSG T7001-2023", "If the horizontal net distance between the outer edge of the car top and the shaft wall is greater than 0.3m, a guardrail shall be installed on the car top." Traditionally, elevator car tops only have guardrails on the sides and rear. The front side is generally not equipped with a guardrail for the convenience of elevator maintenance personnel. Therefore, elevators with a horizontal net distance greater than 0.3m between the front edge of the car top and the shaft wall do not meet the acceptance requirements. This case addresses this issue by designing a four-sided protective car top guardrail. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a car top guardrail for elevators with four-sided protection.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: the car top protection railing is installed as a whole on the top of the elevator car. The car top protection railing includes a rear guardrail, two side guardrails, and a front guardrail. The two side guardrails and the rear guardrail are respectively set on the two sides and the rear side of the car. The two side guardrails and the rear guardrail are both straight railing structures and are connected to the top of the car by connectors. The front guardrail is set on the front side of the car and together with the rear guardrail and the two side guardrails, it forms a protective space. The front guardrail is provided with a removable crossbar for entry and exit. The removable crossbar is detachable from the front guardrail. The railing is a four-sided protective structure. The rear guardrail and the two side guardrails can adopt conventional guardrail structures. The front guardrail has a removable crossbar. The open part of the removable crossbar can be used for personnel to enter and exit. After the entry and exit is completed, the removable crossbar is reinstalled to maintain an effective protective space, so as to comply with the safety design specifications.

[0005] Furthermore, the front guardrail includes side posts, a central post, and a horizontal railing. The side posts are respectively located at both ends of the front guardrail and connected end-to-end to the horizontal railing. Two central posts are provided, forming a width for entry and exit. There is no horizontal railing between the upper parts of the central posts. The easily detachable horizontal railing has legs at both ends and inserts into the inner holes of the central posts, closing the width between the central posts. The space between the central posts forms for entry and exit. The easily detachable horizontal railing has a direct plug-in structure, making it practical, convenient, and reliable.

[0006] Furthermore, the central column is a square tube with an open upper end. The easily detachable crossbar includes a crossbar and legs. The legs are perpendicular to the crossbar and welded to both ends. The legs are also square tubes, with their outer diameter matching the inner diameter of the central column. A through locking hole is provided between the central column and the legs, into which a large round-head knurled nut or wing nut and a bolt are screwed. Both the central column and the legs of the easily detachable crossbar use square tube structures and a mating fit, ensuring reliable connection. To improve locking quality, a locking hole is provided, along with easily detachable large round-head knurled nuts or wing nuts, enhancing ease of use.

[0007] Furthermore, an automatic reset switch is fixed on the central column. This automatic reset switch is connected to the elevator control circuit and is located below the removable horizontal bar. When the removable horizontal bar is inserted into the central column, it presses against the automatic reset switch and triggers it. The automatic reset switch is mounted on the central column via a fixing bracket, which provides a vertically fixed base for the switch. The automatic reset switch is connected to the elevator control circuit. When personnel need to enter or exit, the removable horizontal bar is removed, triggering the automatic reset switch. This disconnects the elevator's operating circuit, putting the elevator into a locked protection state, allowing personnel to safely enter and exit. After entering or exiting, the removable horizontal bar is reinstalled, triggering the automatic reset switch, reconnecting the elevator's operating circuit, and allowing the elevator to enter maintenance mode.

[0008] Furthermore, the rear guardrail is fixedly connected to the side guardrails via connecting plates. These connecting plates are welded to the edges of the rear or side guardrails and fixed to adjacent rear or side guardrails via bolts. The use of connecting plates to connect and fix the rear and side guardrails facilitates installation.

[0009] Compared with the prior art, this utility model has the following advantages and effects: This design is a guardrail structure on the top of an elevator car, which has a good four-sided protection effect, meets the safety design specifications, and is structurally safe and reliable, easy to use, and linked with the elevator's safety circuit to improve the safety of maintenance work. Attached Figure Description

[0010] Figure 1 This is a top-down view of the overall structure of the car roof guardrail.

[0011] Figure 2 yes Figure 1 A partially enlarged structural diagram.

[0012] Figure 3 This is a structural diagram of the front guardrail.

[0013] Figure 4 yes Figure 3A partially enlarged structural diagram.

[0014] Figure 5 This is a schematic diagram of the rear guardrail structure. The side guardrails can use the same structure as the rear guardrail.

[0015] In the diagram: 1. Elevator car; 2. Rear guardrail; 3. Side guardrails; 4. Front guardrail; 5. Removable crossbar; 6. Central column; 7. Crossbar; 8. Support leg; 9. Locking hole; 10. Large round-head knurled nut or wing nut; 11. Automatic reset switch; 12. Fixed bracket; 13. Connecting plate. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0017] An elevator car top guardrail with four-sided protection is provided. The car top guardrail is installed on the top of the elevator car 1. The car top guardrail includes a rear guardrail 2, two side guardrails 3, and a front guardrail 4. The two side guardrails 3 and the rear guardrail 2 are respectively set on the two sides and the rear side of the car. The two side guardrails 3 and the rear guardrail 2 are both straight railing structures and are connected to the top of the car by connectors. The front guardrail 4 is set on the front side of the car and forms a protective space together with the rear guardrail 2 and the two side guardrails 3. The front guardrail 4 is provided with a removable crossbar 5 for entry and exit. The removable crossbar 5 is detachable from the front guardrail 4.

[0018] The front guardrail 4 includes side posts, a central post 6, and a horizontal railing 7. The side posts are respectively set at both ends of the front guardrail 4 and connected to the horizontal railing 7 end to end. There are two central posts 6, forming a width distance for entry and exit. There is no horizontal railing 7 between the upper parts of the central posts 6. The removable horizontal railing 5 has legs 8 at both ends and is inserted into the inner hole of the central post 6. The removable horizontal railing 5 closes the width distance between the central posts 6.

[0019] The central column 6 is a square tube with an open upper end. The easily detachable crossbar 5 includes a crossbar and legs 8. The legs 8 are perpendicular to the crossbar and welded to both ends. The legs 8 are also square tubes with an outer diameter that matches the inner diameter of the central column 6. A through locking hole 9 is provided between the central column 6 and the legs 8. A large round-head knurled nut or wing nut 10 and a bolt are screwed into the locking hole 9.

[0020] An automatic reset switch 11 is fixed on the central column 6. The automatic reset switch 11 is connected to the elevator control circuit. The automatic reset switch 11 is located at the lower part of the removable crossbar 5. When the removable crossbar 5 is inserted into the central column 6, it presses against the automatic reset switch 11 and triggers it. The automatic reset switch 11 is installed on the central column 6 through a fixing bracket 12. The fixing bracket 12 is fixed on the central column 6 and provides a vertically fixed base surface for the automatic reset switch 11.

[0021] The rear guardrail 2 and the two side guardrails 3 are fixedly connected by a connecting plate 13. The connecting plate 13 is welded to the edge of the rear guardrail or the two side guardrails 3 and fixedly connected to the adjacent rear guardrail 2 or the two side guardrails 3 by bolts.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary rather than restrictive in all respects. The scope of this invention is defined by the claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description method is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A four-sided protective roof guard for an elevator, which roof guard is installed as a whole on the roof of an elevator car (1), characterized in that: The car roof guardrail includes a rear guardrail (2), two side guardrails (3) and a front guardrail (4). The two side guardrails (3) and the rear guardrail (2) are respectively set on the two sides and the rear side of the car. The two side guardrails (3) and the rear guardrail (2) are both straight railing structures and are connected to the top of the car by connectors. The front guardrail (4) is set on the front side of the car and forms a protective space together with the rear guardrail (2) and the two side guardrails (3). The front guardrail (4) is provided with a removable crossbar (5) for entry and exit. The removable crossbar (5) and the front guardrail (4) are detachable.

2. The four-sided protected roof balustrade for an elevator according to claim 1, characterized in that: The front guardrail (4) includes side posts, a central post (6), and a horizontal railing (7). The side posts are respectively set at both ends of the front guardrail (4) and connected to the horizontal railing (7) end to end. The central post (6) is set as two posts, forming a width distance for entry and exit. There is no horizontal railing (7) between the upper parts of the central posts (6). The removable horizontal railing (5) has legs (8) at both ends and is inserted into the inner hole of the central post (6). The removable horizontal railing (5) closes the width distance between the central posts (6).

3. The four-sided protected roof hoistway enclosure for an elevator according to claim 2, characterized in that: The central column (6) is a square tube with an open surface at the upper end. The removable crossbar (5) includes a crossbar and a support (8). The support (8) is perpendicular to the crossbar and welded to both ends. The support (8) is also a square tube with an outer diameter that matches the inner diameter of the central column (6). A through locking hole (9) is provided between the central column (6) and the support (8). A large round-head knurled nut or wing nut (10) and a bolt are screwed into the locking hole (9).

4. The four-sided protective roof hoistway enclosure for an elevator according to claim 2, characterized in that: An automatic reset switch (11) is fixed on the central column (6). The automatic reset switch (11) is connected to the elevator control circuit. The automatic reset switch (11) is located at the lower part of the removable crossbar (5). When the removable crossbar (5) is inserted into the central column (6), it presses against the automatic reset switch (11) and triggers it. The automatic reset switch (11) is installed on the central column (6) through a fixing bracket (12). The fixing bracket (12) is fixed on the central column (6) and provides a vertically fixed base surface for the automatic reset switch (11).

5. The four-sided protective roof hoistway enclosure for an elevator as defined in claim 1, wherein: The rear guardrail (2) and the side guardrails (3) are fixedly connected by a connecting plate (13). The connecting plate (13) is welded to the edge of the rear guardrail or the side guardrails (3) and fixedly connected to the adjacent rear guardrail (2) or the side guardrails (3) by bolts.

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