Anti-extrusion and anti-pinch device for cage door of construction elevator
By installing light-sensitive switches and micro-switches on the construction elevator cage door, and using the coordination of movable blocks and baffles, the problem of light curtain sensing is easily affected and the detection range is small, achieving higher safety and sensitivity.
Patent Information
- Application Number
- CN202421701302.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-18
AI Technical Summary
The existing electric cage doors of construction lifts are easily disturbed by light curtain sensing, and the detection range is small, resulting in dangers when small objects such as fingers, feet, iron rods, etc. appear in positions that cannot be sensed by the light curtain.
An anti-extrusion and anti-clip device for cage doors of construction lifts is designed. By installing a light-sensitive switch and a micro-switch in the installation groove, and using the cooperation of the movable block and the baffle, the light-sensitive switch or micro-switch is triggered to prevent the cage door from falling.
The device improves safety through a dual guarantee mechanism, ensuring that the cage door can stop falling and rise in time when an object is detected, avoiding potential dangers.
Smart Images
Figure CN222860905U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of elevators, in particular to an anti-squeezing and anti-pinching device for a cage door of a construction elevator. Background Art
[0002] Construction elevators are often referred to as construction lifts. There are many types of construction elevators. According to their operation mode, there are two types: with or without counterweight. According to their control mode, they are divided into manual control type and automatic control type. Most of the construction elevators currently used on the market are counterweight-free. The drive system is placed above the cage. On the one hand, it can reduce the noise in the cage and increase the clearance in the cage. At the same time, it also makes the transmission more stable and the mechanism vibration is smaller. The counterweight-free design also simplifies the installation process. In order to facilitate the control and intelligence of the construction elevator, the construction elevator can also be installed with a frequency converter, which is energy-saving and can be steplessly adjusted. It runs more smoothly and is more comfortable to ride. The construction elevator with a leveling device is more convenient to control and can stop more accurately at the floor where it needs to stop. The installation of a floor call device can make the information flow during use more convenient and make management more convenient.
[0003] Most of the existing electric cage doors of elevators use light curtains to sense whether objects are at the cage door. However, light curtain sensing is easily interfered with and has a small detection range. It is easy to cause danger when small objects such as fingers, feet, iron bars, etc. appear in a position that the light curtain cannot sense. Utility Model Content
[0004] The purpose of the utility model is to provide an anti-extrusion and anti-pinch device for a construction elevator cage door, so as to solve the problems proposed in the above-mentioned background technology that the light curtain sensing is easily disturbed, the detection range is small, and danger may easily occur when small objects such as fingers, feet, iron bars, etc. appear in the position that the light curtain cannot sense.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-squeezing and anti-pinch device for a cage door of a construction elevator, comprising a car and a cage door slidably connected thereto, a mounting groove being installed at the bottom end of the cage door, a mounting hole being provided on the bottom surface of the mounting groove, a movable box being fixedly connected below the mounting groove, a plurality of movable grooves being provided on the bottom surface of the movable box, a movable block being provided inside the movable groove, and a first baffle being fixedly connected to the top end of the movable block;
[0006] A light-sensing switch is installed inside the installation hole.
[0007] Preferably, a micro switch is installed at the bottom end of the mounting groove.
[0008] Preferably, cushion blocks are fixedly connected to both sides of the bottom end of the movable box, and the height of the cushion blocks is greater than the height of the movable block.
[0009] Preferably, the first baffle plate at the top end of the movable block moves in the movable box, and the length and width of the first baffle plate are smaller than the length and width of the movable box.
[0010] Preferably, a second baffle is fixedly connected to the bottom end of the movable block.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The photosensitive switch can be installed in the installation groove through the installation hole, and installed in the movable groove through the movable block. The second baffle can touch an object when the cage door falls, so that the first baffle is lifted up, triggering the photosensitive switch, and transmitting the signal to the control system to stop the cage door from falling and rising. When the photosensitive switch fails, the first baffle can lift up and trigger the microswitch. The double protection greatly improves the safety. The cushion block can limit the cage door when it falls completely to prevent the cage door from touching the bottom and causing the baffle to be lifted up and unable to fall. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;
[0014] Figure 2 It is a schematic diagram of the exploded structure of the installation slot and the movable box of the utility model;
[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the installation slot and the movable box of the utility model.
[0016] Numbers in the figure: 1. Car; 2. Cage door; 3. Mounting groove; 4. Mounting hole; 5. Movable box; 6. Movable groove; 7. Movable block; 8. First baffle; 9. Photosensitive switch; 10. Micro switch; 11. Pad; 12. Second baffle. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] See also Figure 1-3As shown, the utility model provides a technical solution: an anti-extrusion and anti-pinch device for a cage door of a construction elevator, comprising a car 1 and a cage door 2 slidably connected thereto, a mounting groove 3 is installed at the bottom end of the cage door 2, a mounting hole 4 is opened on the bottom surface of the mounting groove 3, a movable box 5 is fixedly connected below the mounting groove 3, a plurality of movable grooves 6 are opened on the bottom surface of the movable box 5, a movable block 7 is arranged inside the movable groove 6, and a first baffle 8 is fixedly connected to the top of the movable block 7;
[0019] A photosensitive switch 9 is installed inside the mounting hole 4. When the movable block 7 touches a foreign object, it can lift the first baffle 8, triggering the photosensitive switch 9 to transmit a signal to the control system, so that the cage door 2 stops falling and rises.
[0020] Furthermore, a micro switch 10 is installed at the bottom of the installation groove 3. When the light switch 9 fails, the first baffle 8 lifts up to trigger the micro switch 10, which provides double protection and greatly improves safety.
[0021] Furthermore, pads 11 are fixedly connected to both sides of the bottom of the movable box 5. The height of the pads 11 is greater than the height of the movable block 7. The pads 11 can limit the cage door 2 when it is completely dropped to prevent the cage door 2 from touching the bottom, thereby making the first baffle 8 lifted and unable to fall.
[0022] Furthermore, the first baffle 8 at the top of the movable block 7 moves in the movable box 5, and the length and width of the first baffle 8 are smaller than those of the movable box 5, which can prevent the first baffle 8 from being stuck with the movable box 5 and affecting the triggering effect.
[0023] Furthermore, a second baffle 12 is fixedly connected to the bottom end of the movable block 7. The second baffle 12 can make the movable block 7 contact a larger area of foreign matter, making the detection more sensitive.
[0024] Working principle: First, move an anti-extrusion and anti-pinch device for a construction elevator cage door to the working position. When in use, the first step is to weld the movable block 7 to the first baffle 8 and put it into the movable groove 6, and then weld the second baffle 12 to the bottom of the movable block 7. The second step is to install the photosensitive switch 9 in the mounting hole 4 and the microswitch 10 on one side. The third step is to install the movable box 5 at the bottom of the cage door 2 through the mounting groove 3, and connect the switch circuit to the control system. The fourth step is that the cage door 2 falls, and when the second baffle 12 touches the object and is lifted up, the photosensitive switch 9 is triggered, and the signal is transmitted to the control system, and the cage door 2 stops descending and rises, thus completing the use process of an anti-extrusion and anti-pinch device for a construction elevator cage door.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An anti-extrusion and anti-pinch device for a construction elevator cage door, comprising a car (1) and a cage door (2) slidably connected thereto, characterized in that: The bottom end of the cage door (2) is provided with a mounting groove (3), the bottom surface of the mounting groove (3) is provided with a mounting hole (4), a movable box (5) is fixedly connected below the mounting groove (3), a plurality of movable grooves (6) are provided on the bottom surface of the movable box (5), movable blocks (7) are provided inside the movable grooves (6), and a first baffle (8) is fixedly connected to the top of the movable block (7); A light-sensing switch (9) is installed inside the installation hole (4).
2. The anti-extrusion and anti-pinch device for a construction elevator cage door according to claim 1, characterized in that: A micro switch (10) is installed at the bottom end of the installation groove (3).
3. The anti-extrusion and anti-pinch device for a construction elevator cage door according to claim 1, characterized in that: Cushion blocks (11) are fixedly connected to both sides of the bottom end of the movable box (5), and the height of the cushion blocks (11) is greater than the height of the movable block (7).
4. The anti-extrusion and anti-pinch device for a construction elevator cage door according to claim 1, characterized in that: The first baffle (8) at the top end of the movable block (7) moves in the movable box (5), and the length and width of the first baffle (8) are smaller than the length and width of the movable box (5).
5. The anti-extrusion and anti-pinch device for a construction elevator cage door according to claim 4, characterized in that: A second baffle (12) is fixedly connected to the bottom end of the movable block (7).