Safety device for lifting channel of construction hoist

Abstract

The utility model relates to a safety device for a lifting channel of a building hoist, and belongs to the technical field of building hoisting and transporting machinery. The device comprises a transverse connecting rod, an amplification driving lever, a strong magnetic sheet, an induction type proximity switch and two mounting supports, the two mounting supports are arranged on two sides of the transverse connecting rod, the amplification driving lever is mounted on the mounting supports, the strong magnetic sheet is mounted on one side of the bottom of each mounting support, and the induction type proximity switch is mounted on the other side of each mounting support. The two-way protection device is safe and reasonable in structural design, more sensitive and reliable, capable of acting in two directions, free of protection blind areas and capable of meeting use requirements.

Description

Technical Field

[0001] The utility model relates to a safety device, in particular to a safety device for a lifting passage of a construction elevator, and belongs to the technical field of building hoisting and transporting machinery. Background Art

[0002] A construction elevator is a lifting and transportation machinery used in the construction of high-rise buildings, bridges, chimneys and other buildings (structures). Its operating safety is directly related to the safety of construction workers and goods; and the operation of the lifting channel is an important link among many safety factors that cannot be ignored.

[0003] During the lifting operation of the construction elevator, if an obstacle enters the lifting channel, it will bring great safety hazards to the lifting operation of the elevator, especially for the currently emerging intelligent control construction elevators without professional drivers. Therefore, a safety device for the operation of the lifting channel is needed, so that when the elevator is lifting in the lifting channel, once an obstacle enters the lifting channel, the lifting operation of the cage can be stopped in time to avoid the cage hitting the obstacle and causing losses.

[0004] At present, many manufacturers have developed safety devices for elevator hoistways with various structural types. However, the following problems are common: (1) The action is not sensitive enough. The mechanical contact limit switch with spring combination used by most manufacturers is prone to failure due to the fatigue characteristics of the spring. (2) The protection direction is limited. For example, the upper protection function can only work when the cage moves upward and hits an obstacle, but not when it moves downward. Because the construction environment is very complex, there is a probability that a rod will extend under the protective device when the cage stops running. If the cage starts to move downward at this time, the upper protection function will fail, or a limit switch needs to be added to play a protective role. (3) There are blind spots in protection: such as the "A construction elevator lifting channel detection device" disclosed in CN221027040U and the "A construction elevator anti-collision device" disclosed in CN212101523U. Although the protection function of two-way action is guaranteed by the combination of wire rope around the pulley, if the obstacle acts on the pulley supporting the wire rope or the rack on which the pulley is installed, there is still a lack of response, causing the cage to continue to run and collide with the obstacle.

[0005] Therefore, it is particularly necessary to develop an anti-collision safety device with a more sensitive and reliable structural design, which can act in both directions and has no blind spots. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a construction elevator lifting channel safety device which has a safe and reasonable structural design, is more sensitive and reliable, can act in both directions and has no blind spots for protection.

[0007] The technical solution adopted by the utility model to solve the above-mentioned problem is: the lifting channel safety device of the construction elevator includes a horizontal connecting rod and two mounting supports, and the two mounting supports are arranged on both sides of the horizontal connecting rod. It is characterized in that it also includes an amplifying lever, a strong magnetic sheet and an inductive proximity switch. The mounting support is equipped with an amplifying lever, a strong magnetic sheet is installed on one side of the bottom of the mounting support, and an inductive proximity switch is installed on the other side of the mounting support.

[0008] Preferably, the amplifying lever of the utility model comprises a short side foot and a long side foot connected to each other, the short side foot is connected to the horizontal connecting rod, and the long side foot is fixed by magnetic attraction through a strong magnetic sheet.

[0009] Preferably, the amplifying lever of the utility model further comprises a connecting rod hole and a protruding small round hole, the short side foot is connected to the horizontal connecting rod through the connecting rod hole, and the protruding small round hole can be connected to a wire rope.

[0010] Preferably, the width of the long side leg of the utility model covers the sensing end of the inductive proximity switch.

[0011] Preferably, the amplifying lever of the utility model rotates around the axis of the mounting support.

[0012] Compared with the prior art, the utility model has the following advantages and effects: the overall structural design is reasonable, safe and reliable, the manufacturing and installation are more convenient, the detection is more sensitive and reliable, it can act in both directions and there is no blind spot in protection; once the inductive proximity switch cannot sense the entity, it becomes disconnected, and the disconnection information is transmitted to the control center for power-off emergency stop processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall installation structure of an embodiment of the utility model.

[0014] Figure 2 It is an enlarged structural schematic diagram of a single mounting seat of an embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the amplifying lever in the embodiment of the utility model.

[0016] Figure 4 It is a structural schematic diagram of the practical application of the embodiment of the utility model.

[0017] In the figure: horizontal connecting rod 1, enlarged lever 2, mounting support 3, strong magnetic sheet 4, inductive proximity switch 5; short side leg 21, long side leg 22, connecting rod hole 23, protruding small round hole 24, wire rope S. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0019] Example

[0020] See also Figures 1 to 4 The lifting channel safety device of the construction elevator in this embodiment includes a horizontal connecting rod 1, an amplifying lever 2, a strong magnetic sheet 4, an inductive proximity switch 5 and two mounting supports 3. The two mounting supports 3 are arranged on both sides of the horizontal connecting rod 1. The amplifying lever 2 is installed on the mounting support 3, and a strong magnetic sheet 4 is installed on one side of the bottom of the mounting support 3. The inductive proximity switch 5 is installed on the other side of the mounting support 3.

[0021] Two mounting brackets 3 are fixed by bolts on the two corners of the cage top guardrail close to the building (structure). An amplifying lever 2 is installed on the mounting bracket 3, a strong magnetic sheet 4 is installed on one side under the mounting bracket 3, and an inductive proximity switch 5 is installed on the other side (i.e. opposite to the strong magnetic sheet 4); the amplifying lever 2 rotates around the axis of the mounting bracket 3.

[0022] The amplifying lever 2 in this embodiment has two side legs of different lengths, similar to an L-shape, and the amplifying lever 2 includes a short side leg 21, a long side leg 22, a connecting rod hole 23 and a protruding small round hole 24; wherein the short side leg 21 is connected to the horizontal connecting rod 1 through the connecting rod hole 23, and the protruding small round hole 24 can be connected to the wire rope S.

[0023] The long side leg 22 in this embodiment is magnetically fixed by the strong magnetic sheet 4, and the width of the long side leg 22 covers the sensing end of the inductive proximity switch 5; the inductive proximity switch 5 is in a normally closed state, and once it cannot sense an entity, it becomes a disconnected state, and the disconnection information is transmitted to the control center for power-off emergency stop processing.

[0024] In this embodiment, both ends of the cross-link 1 are connected to the enlarged levers 2 at both ends. The two ends can be connected by threads, or small holes at different distances can be opened and fixed with cotter pins. The cross-link 1 is not limited to a fixed length, and can also be connected in sections to adapt to cages of different widths.

[0025] Working principle: When the cage is in operation, if an obstacle extends into the lifting channel of the cage, it will first hit the horizontal connecting rod 1, and the horizontal connecting rod 1 will drive the amplifying lever 2 to rotate; because the amplifying lever 2 has two side feet of different lengths, the short side foot 21 is connected to the horizontal connecting rod 1, thereby driving the long side foot 22 to rotate, playing the role of information amplification and ensuring the sensitivity of detection. The long side foot 22 rotates out of the sensing area of ​​the inductive proximity switch 5, so that the inductive proximity switch 5 cannot sense the object, and is in a circuit-breaking state, ensuring that the cage is powered off and stops running. Since the short side foot 21 of the amplifying lever 2 is higher than the mounting support 3, if the obstacle is running in the direction just above the mounting support 3, it must first contact the short side foot 21 of the amplifying lever 2, thereby driving the amplifying lever 2 to rotate, and so on; finally, the contact blind area of ​​the two mounting supports 3 is avoided; this detection area can basically meet the needs of most construction sites.

[0026] In addition, if the cage side also needs to have the lifting channel safety protection function on site, it only needs to connect the protruding small round holes 24 of the front and rear amplifying levers 2 through the connecting wire rope S to meet the lifting and anti-collision protection function of the side. Figure 4 shown.

[0027] Through the above description, those skilled in the art can already implement it.

[0028] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A construction elevator hoistway safety device, comprising a transverse connecting rod (1) and two mounting supports (3), wherein the two mounting supports (3) are arranged on both sides of the transverse connecting rod (1), characterized in that: It also includes an amplifying lever (2), a strong magnetic sheet (4) and an inductive proximity switch (5). The amplifying lever (2) is mounted on the mounting support (3), a strong magnetic sheet (4) is mounted on one side of the bottom of the mounting support (3), and an inductive proximity switch (5) is mounted on the other side of the mounting support (3).

2. The construction elevator hoistway safety device according to claim 1 is characterized in that: The amplifying lever (2) comprises a short side foot (21) and a long side foot (22) which are connected to each other. The short side foot (21) is connected to the horizontal connecting rod (1), and the long side foot (22) is fixed by magnetic attraction via a strong magnetic sheet (4).

3. The construction elevator hoistway safety device according to claim 2 is characterized in that: The amplifying lever (2) further comprises a connecting rod hole (23) and a protruding small round hole (24); the short side foot (21) is connected to the transverse connecting rod (1) via the connecting rod hole (23); and the protruding small round hole (24) can be connected to a steel wire rope.

4. The construction elevator hoistway safety device according to claim 2 is characterized in that: The width of the long side leg (22) covers the sensing end of the inductive proximity switch (5).

5. The construction elevator hoistway safety device according to claim 1 is characterized in that: The amplifying lever (2) rotates around the axis of the mounting support (3).

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