Anti-loosening and anti-overload device for elevator

Abstract

The anti-loosening and anti-overload device comprises a rope hitch plate, a plurality of rope hitch rods are connected to the rope hitch plate in a sliding mode, the lower ends of the rope hitch rods are used for being connected with a traction rope, the upper ends of the rope hitch rods are connected with an induction plate, the middle of the induction plate is connected with an overload detection element, and a rope loosening detection element is arranged above one side of the induction plate. The induction plate is used for driving the overload detection element to move downwards to collide with the rope hitch plate after the elevator is overloaded and driving the induction plate to move upwards to trigger the rope loosening detection element after the hoisting rope is loosened. According to the utility model, overload detection and rope loosening detection of the elevator can be stably realized.

Description

Technical Field

[0001] The utility model relates to the field of elevators, in particular to an elevator anti-loosening and anti-overload device. Background Art

[0002] Currently, there are two ways for the elevator industry to detect elevator overload. The first is to set the elevator car floor as a movable car floor. When the load in the car is overweight, the elevator car floor is subjected to force and produces micro-deformation. The corresponding sensor detects the deformation amplitude to realize the overload detection function. The second is to install a detection sensor on the outside of the traction rope rope end assembly. When the elevator is overloaded, the traction rope over-tightens the rope end assembly, causing the rope end assembly to deform. The detection sensor is then used to detect the deformation amount to realize the overload detection function. However, the defect of this detection method is that since the existing rope end assembly is an integrated structure and is connected to each traction rope at the same time, when the elevator is slightly overloaded, the deformation of the rope end assembly is relatively small, which can easily cause errors in the detection results.

[0003] On the other hand, existing elevators also have a travel switch installed on the outside of the rope assembly to detect slack or breakage of the traction ropes. When any traction rope becomes loose or broken, the traction force on the rope assembly decreases, causing it to move upward and strike the travel switch, thus realizing the detection function. However, because the rope assembly is pulled by multiple traction ropes at the same time, the displacement of the rope assembly after any traction rope is released is relatively small, making it difficult to stably trigger the travel switch, resulting in relatively poor detection effect.

[0004] Therefore, the existing elevator overload detection method and loose rope detection method have the problem of poor detection stability. Utility Model Content

[0005] The purpose of the utility model is to provide an elevator anti-loosening and anti-overload device, which can stably realize overload detection and loose rope detection of the elevator.

[0006] The technical solution of the utility model is: an elevator anti-loosening and anti-overload device, including a rope end plate, a plurality of rope end rods are slidably connected to the rope end plate, the lower end of the rope end rod is used to connect the traction rope, the upper end of the rope end rod is connected to a sensing plate, the middle part of the sensing plate is connected to an overload detection element, and a loose rope detection element is provided above one side of the sensing plate; the sensing plate is used to drive the overload detection element to move downward to collide with the rope end plate after the elevator is overloaded, and to drive the sensing plate to move upward to trigger the loose rope detection element after the traction rope is loose.

[0007] In the aforementioned elevator anti-loosening and anti-overload device, the overload detection element is an automatic reset type elevator travel switch, and the contact of the overload detection element extends vertically downward and to the outside of the induction plate.

[0008] In the aforementioned elevator anti-loosening and anti-overload device, the loose rope detection element is a photoelectric switch, an opening is formed in the middle of the loose rope detection element for the induction plate to pass through, and a trigger part for passing through the opening is provided on one side of the induction plate.

[0009] In the aforementioned elevator anti-loosening and anti-overload device, a limit plate is connected to the rope end rod below the induction plate, and a compression spring is provided between the limit plate and the rope end plate and is sleeved on the outside of the rope end rod.

[0010] In the aforementioned elevator anti-loosening and anti-overload device, one end of the rope end plate is sleeved on the rope end rod through the hole body, and nuts threadedly connected to the rope end rod are provided on the upper and lower sides of the rope end plate. The nuts on both sides are used to squeeze and fix the rope end plate on the rope end rod.

[0011] In the aforementioned elevator anti-loosening and anti-overload device, a dust cover is provided on the outside of the rope end plate, and the dust cover is placed on the rope end plate through angle brackets on all sides. The top two sides of the dust cover are connected to the rope end plate through tension springs, and the loose rope detection element is fixed on the inner side of the dust cover.

[0012] In the aforementioned elevator anti-loosening and anti-overload device, a rubber pad is provided on the inner wall of the dust cover above the rope head rod.

[0013] Compared with the prior art, the present invention has the following characteristics:

[0014] (1) The present invention uses a novel structure that cooperates with the rope end plate, the rope end rod and the induction plate, so that each rope end rod can be raised and lowered individually on the rope end plate, and the induction plate can be raised and lowered synchronously with the rope end rod; on this basis, through the setting of the overload detection element and the loose rope detection element, when the elevator has an overload problem, the rope end rod can drive the overload detection element to move downward to collide with the rope end plate under the traction action of the traction rope, thereby realizing the overload detection function; and when the traction rope has a loose rope or broken rope problem, the corresponding rope end rod and the induction plate can be moved upward to trigger the loose rope detection element, thereby realizing the loose rope detection function; that is, the stability of overload detection and loose rope detection can be effectively improved;

[0015] (2) By defining the matching structure of the loose rope detection element and the trigger part, the loose rope detection element and the rope end rod can be separated on the left and right sides, so that when the rope end rod and the induction plate are bounced together, it will not cause collision with the loose rope detection element, thereby improving its structural stability;

[0016] (3) On the basis of the above, through the structural coordination of the dust cover and the tension spring, when the rope end rod moves upward to contact the dust cover at the moment of rope breaking, the dust cover can be driven to rise together, so that on the one hand, the dust cover is used to limit and buffer the rope end rod to prevent the rope end rod from deviating outward, and on the other hand, the rope end rod and the dust cover can be kept in the continuous triggering state of the trigger part on the loose rope detection element during the process of rising together, that is, the problem of the loose rope detection element being unable to be stably triggered due to the induction plate passing through the loose rope detection element instantaneously due to the excessive rising speed is avoided, thereby further improving the loose rope detection stability of the utility model;

[0017] Therefore, the utility model can stably realize overload detection and loose rope detection of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the utility model;

[0019] Figure 2 It is a side view of the utility model;

[0020] Figure 3 This is a schematic diagram of the distribution of the sensor plate and the loose rope detection element when viewed from above.

[0021] The marks in the accompanying drawings are: 1-rope end plate, 2-rope end rod, 3-sensing plate, 4-overload detection element, 5-loose rope detection element, 6-limiting plate, 7-compression spring, 8-nut, 9-dust cover, 10-tension spring, 11-rubber pad, 301-trigger part, 901-angle bracket. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0023] Embodiment. An elevator anti-loosening and anti-overloading device is composed of Figure 1 As shown, it includes a rope end plate 1 installed on the top of the motor shaft, and multiple rope end rods 2 are slidably connected to the rope end plate 1. The lower end of the rope end rod 2 is used to connect the traction rope, and each traction rope is separately connected to a rope end rod 2. The upper end of the rope end rod 2 is connected to a sensing plate 3. The sensing plates 3 of different rope end rods 2 are separated from each other. The cross-sectional shape of the sensing plate 3 is L-shaped, and an overload detection element 4 is connected to the middle of the sensing plate 3. A loose rope detection element 5 is provided above one side of the sensing plate 3; the sensing plate 3 is used to drive the overload detection element 4 to move downward to collide with the rope end plate 1 after the elevator is overloaded, and to drive the sensing plate 3 to move upward to trigger the loose rope detection element 5 after the traction rope is loose.

[0024] The overload detection element 4 is an automatic reset type elevator travel switch, and the contact of the overload detection element 4 extends vertically downward and to the outside of the induction plate 3.

[0025] The loose rope detection element 5 is a photoelectric switch. An opening is formed in the middle of the loose rope detection element 5 for the sensor plate 3 to pass through. One side of the sensor plate 3 extends outward and forms a trigger portion 301 for passing through the opening.

[0026] A limit plate 6 is connected to the rope end rod 2 below the induction plate 3 , and a compression spring 7 is provided between the limit plate 6 and the rope end plate 1 and is sleeved on the outside of the rope end rod 2 .

[0027] One end of the rope end plate 1 is sleeved on the rope end rod 2 through the hole body, and nuts 8 threadedly connected to the rope end rod 2 are provided on the upper and lower sides of the rope end plate 1. The nuts 8 on both sides are used to squeeze and fix the rope end plate 1 on the rope end rod 2.

[0028] The outside of the rope end plate 1 is provided with a dust cover 9, and the four sides of the dust cover 9 are placed on the rope end plate 1 through angle brackets 901 and wrap all the rope end plates 1. The top sides of the dust cover 9 are connected to the rope end plate 1 through tension springs 10, and the loose rope detection element 5 is fixed on the inner side wall of the dust cover 9; when the upper end of the rope end rod 2 is in contact with the top of the dust cover 9, the trigger part 301 is located in the opening of the loose rope detection element 5 and keeps triggering the loose rope detection element 5.

[0029] A rubber pad 11 is provided on the inner wall of the dust cover 9 above the rope end rod 2.

[0030] Working Principle of the Utility Model: During use, the bottom of each rope end rod 2 is connected to a traction rope, enabling the traction rope to independently drive the rope end rod 2 to move up and down. When the elevator car is overloaded, the traction rope exerts a downward traction force on the rope end rod 2, causing the rope end rod 2 to move downward with the induction plate 3. When the overload detection element 4 descends with the induction plate 3 until it contacts the rope end plate 1, the overload detection element 4 triggers and sounds an alarm, realizing the overload detection function. Furthermore, the operator can adjust the height of the induction plate 3 using the nut 8, so that the overload detection element 4 remains in a stable triggering state when the elevator is overloaded.

[0031] When any traction rope is loose or broken, the rope end rod 2 corresponding to the traction rope rises rapidly after losing traction, and drives the trigger part 301 to move into the opening of the loose rope detection element 5 during the rising process, thereby triggering the loose rope detection element 5 to realize the loose rope detection function.

[0032] When the rope end rod 2 is in an over-pressed state before the rope is loosened or broken, the rope end rod 2 will rise rapidly due to the rebound force of the compression spring 7 after the rope breaks, and drive the trigger part 301 to instantly pass through the opening of the rope loosening detection element 5. The dust cover 9 and the tension spring 10 are arranged so that the rope end rod 2 can push the dust cover 9 after the rapid rise and drive the dust cover 9 to rise together; when the dust cover 9 and the rope end rod 2 are in a mutually abutting state, the trigger part 301 is located in the opening of the detection element 5, so that the rope loosening detection element 5 can remain in the triggered state during the rope end rod 2's rise, thus ensuring its detection stability.

Claims

1. An elevator anti-loosening and anti-overload device, characterized by: The invention comprises a rope end plate (1), a plurality of rope end rods (2) are slidably connected to the rope end plate (1), the lower ends of the rope end rods (2) are used to connect the traction rope, the upper ends of the rope end rods (2) are connected to a sensing plate (3), the middle part of the sensing plate (3) is connected to an overload detection element (4), and a loose rope detection element (5) is provided above one side of the sensing plate (3); the sensing plate (3) is used to drive the overload detection element (4) to move downward to collide with the rope end plate (1) after the elevator is overloaded, and to drive the sensing plate (3) to move upward to trigger the loose rope detection element (5) after the traction rope is loosened.

2. The elevator anti-loosening and anti-overload device according to claim 1, characterized in that: The overload detection element (4) is an automatic reset type elevator travel switch, and the contact of the overload detection element (4) is vertically downward and extends to the outside of the induction plate (3).

3. The elevator anti-loosening and anti-overload device according to claim 1, characterized in that: The loose rope detection element (5) is a photoelectric switch. An opening is formed in the middle of the loose rope detection element (5) for the sensing plate (3) to pass through. A trigger part (301) for passing through the opening is provided on one side of the sensing plate (3).

4. The elevator anti-loosening and anti-overload device according to claim 1, characterized in that: A limit plate (6) is connected to the rope end rod (2) below the induction plate (3), and a compression spring (7) sleeved on the outside of the rope end rod (2) is provided between the limit plate (6) and the rope end plate (1).

5. The elevator anti-loosening and anti-overload device according to claim 1, characterized in that: One end of the rope end plate (1) is sleeved on the rope end rod (2) through the hole body, and nuts (8) for threaded connection with the rope end rod (2) are provided on the upper and lower sides of the rope end plate (1). The nuts (8) on both sides are used to squeeze and fix the rope end plate (1) on the rope end rod (2).

6. The elevator anti-loosening and anti-overload device according to claim 1, characterized in that: A dust cover (9) is provided on the outside of the rope end plate (1), and the four sides of the dust cover (9) are placed on the rope end plate (1) via angle brackets (901). The top two sides of the dust cover (9) are connected to the rope end plate (1) via tension springs (10), and the loose rope detection element (5) is fixed on the inner side of the dust cover (9).

7. The elevator anti-loosening and anti-overload device according to claim 6, characterized in that: A rubber pad (11) is provided on the inner wall of the dust cover (9) above the rope end rod (2).

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