Cam type automatic opening and closing device of construction hoist landing door
By using a cam-type automatic switching device on the construction elevator floor door, the automatic switching function is realized using the mechanical structure, the existing electronic control methods are solved, and the cost-effective automatic switching effect is achieved.
Patent Information
- Application Number
- CN202421665275.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The automatic switching devices of existing construction elevator floor doors mainly adopt electronic control method, which is costly and has problems such as equipment failure and complex maintenance.
It adopts a cam-type automatic switching device, which is composed of a mechanical structure, including a bump, a cam, a long rod, a baffle and a pulley, and automatically switches the layer door through a mechanical mechanism.
The automatic switching function of the construction elevator layer door is realized, which reduces costs, simplifies the equipment structure and maintenance process, and improves the reliability and service life of the equipment.
Smart Images
Figure CN222960937U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction hoists, and particularly relates to a cam-type automatic opening and closing device for a construction hoist landing door. Background Art
[0002] A construction hoist is a manned and cargo-carrying construction machine widely used in various constructions, mainly for the interior and exterior decoration of high-rise buildings, the construction of buildings such as bridges and chimneys. In the prior art, the automatic opening and closing function of a construction hoist landing door is usually realized by a combination of devices such as an electromagnet, a human body infrared sensor, and a door closer. When a person approaches the landing door, the human body infrared sensor senses the signal and sends it to the control system. After receiving the signal, the control system controls the electromagnet to be energized, so that the electromagnet contacts the middle position at the upper end of the landing door, thereby keeping the landing door in an open state. When a person leaves the landing door, the human body infrared sensor senses the signal again and sends it to the control system. After receiving the signal, the control system controls the electromagnet to be de-energized, and at this time, the door closer drives the landing door to close automatically. Therefore, most of the commonly used automatic opening and closing door methods in the prior art are electrically controlled methods, which have a high cost. Content of the Utility Model
[0003] To solve the above technical problems, the utility model provides a cam-type automatic opening and closing device for a construction hoist landing door, which is composed of a mechanical structure and can realize the automatic opening and closing of the construction hoist landing door.
[0004] The utility model adopts the following technical solutions:
[0005] A cam-type automatic opening and closing device for a construction hoist landing door is installed between the discharge door and the landing door of the construction hoist, and includes a bump, a cam, a long rod, a baffle, and a pulley. An installation rod is provided on the landing door, and a first spring is provided on the installation rod. One end of the first spring has a steel wire rope. A pulley is provided at the position directly below the installation rod and at the door frame of the landing door. The steel wire rope passes around the pulley and is connected to the landing door. The bump is located on the discharge door. The baffle is connected to the hoist and is located on one side of the discharge door. A second spring is provided on the discharge door, and one end of the second spring abuts against the bump. A chute matching the bump is provided on the cam, and the long rod is arranged on the cam.
[0006] Preferably, the chute is a spiral groove provided on the surface of the cam.
[0007] Preferably, one end of the long rod has a roller.
[0008] Preferably, the automatic opening and closing device has a first state. In the first state, the bump is located in the installation groove of the discharge door, and the bump presses on the second spring. The baffle is located on one side of the discharge door to limit the outward movement of the bump.
[0009] Preferably, the automatic switch device has a second state. In the second state, the discharge door moves relative to the baffle, the baffle releases the restriction on the collision block, and the collision block slides in the chute, causing the long rod to rotate and push the landing door open.
[0010] Preferably, in the second state, the landing door is in a stretched state by pulling the first spring through the steel wire rope.
[0011] Compared with the prior art, the utility model has the following advantages: The utility model provides an automatic switch device for a landing door of a construction hoist, which includes a collision block, a cam, a long rod, a baffle and a pulley. During operation, the discharge door moves relative to the baffle, the baffle releases the restriction on the collision block, and the collision block slides in the chute, causing the long rod to rotate and push the landing door open. It is composed of a mechanical structure and can realize the automatic opening and closing of the landing door of the construction hoist. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic structural diagram of the automatic switch device.
[0013] Figure 2 It is a schematic structural diagram of the discharge door and the baffle part.
[0014] Figure 3 It is a schematic structural diagram of the landing door and the long rod part.
[0015] Figure 4 It is a schematic structural diagram of the landing door.
[0016] Figure 5 It is a schematic structural diagram of the door frame.
[0017] In the figure, discharge door 1, landing door 2, collision block 3, cam 4, chute 4-1, long rod 5, baffle 6, pulley 7, first spring 8, steel wire rope 9, door frame 10, roller 11, second spring 12. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] In order to facilitate the understanding of the technical solution of the utility model, the following is a detailed description in combination with the attached drawings and specific embodiments.
[0019] Embodiment 1
[0020] As Figures 1-5As shown in the figure, a cam-type automatic switch device for the landing door of a construction hoist is installed between the discharge door 1 and the landing door 2 of the construction hoist. It includes a bumper 3, a cam 4, a long rod 5, a baffle 6 and a pulley 7. There is a mounting rod on the landing door 2, and a first spring 8 is provided on the mounting rod. One end of the first spring 8 has a steel wire rope 9. There is a pulley 7 at the position directly below the mounting rod and at the door frame 10 of the landing door 2. The steel wire rope 9 passes around the pulley 7 and is connected to the landing door 2. The bumper 3 is located on the discharge door 1. The baffle 6 is connected to the hoist and is located on one side of the discharge door 1. There is a second spring 12 on the discharge door 1, and one end of the second spring 12 abuts against the bumper 3. The cam 4 has a chute 4-1 matching the bumper 3, and the long rod 5 is arranged on the cam 4.
[0021] The chute 4-1 is a spiral groove provided on the surface of the cam 4.
[0022] One end of the long rod 5 has a roller 11.
[0023] The automatic switch device has a first state. In the first state, the bumper 3 is located in the mounting groove of the discharge door 1, and the bumper 3 presses on the second spring 12. The baffle 6 is located on one side of the discharge door 1 to limit the outward movement of the bumper 3.
[0024] The automatic switch device has a second state. In the second state, the discharge door 1 moves relative to the baffle 6, and the baffle 6 releases the restriction on the bumper 3. The bumper 3 slides in the chute 4-1, causing the long rod 5 to rotate and push the landing door 2 open. And the landing door 2 pulls the first spring 8 through the steel wire rope 9 and is in a stretched state.
[0025] The first state is the state where the landing door 2 is not opened. When the landing door 2 needs to be opened, the discharge door 1 moves upward relative to the baffle 6, and the baffle 6 releases the restriction on the bumper 3. The bumper 3 moves outward under the action of the second spring 12. The bumper 3 slides in the chute 4-1, causing the cam 4 to rotate, thereby driving the long rod 5 to rotate and abut against the landing door 2, and then pushing the landing door 2 open. When the landing door 2 is pushed open, the first spring 8 is pulled through the steel wire rope 9 and is in a stretched state. When the discharge door 1 moves downward relative to the baffle 6, the discharge door 1 drives the bumper 3 to move downward. After the bumper 3 contacts the baffle 6, it retracts into the discharge door 1 under the action of the baffle 6 and compresses the first spring 7. When the bumper 3 passes through the chute 4-1, it drives the cam 4 to rotate. The rotation of the cam 4 drives the long rod 5 to retract. The first spring 8 resets and pulls the landing door 2 back to close through the steel wire rope 9.
[0026] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is subject to the scope defined by the claims. Several improvements and refinements made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A cam type automatic opening and closing device for a construction elevator landing door, characterized in that: The utility model is installed between the discharge door (1) and the floor door (2) of the construction elevator, and comprises a bumper (3), a cam (4), a long rod (5), a baffle (6) and a pulley (7). The floor door (2) is provided with a mounting rod, the mounting rod is provided with a first spring (8), one end of the first spring (8) is provided with a steel wire rope (9), a pulley (7) is provided just below the mounting rod and at the door frame of the floor door (2), the steel wire rope (9) is connected to the floor door (2) after passing through the pulley (7), the bumper (3) is located on the discharge door (1), the baffle (6) is connected to the elevator and is located on one side of the discharge door (1), the discharge door (1) is provided with a second spring, one end of the second spring is against the bumper (3), the cam (4) is provided with a slide groove (4-1) matching the bumper (3), and the long rod (5) is arranged on the cam (4).
2. A cam type automatic opening and closing device for a construction elevator landing door according to claim 1, characterized in that: The slide groove (4-1) is a spiral groove arranged on the surface of the cam (4).
3. The cam type automatic opening and closing device for the floor door of a construction elevator according to claim 1 is characterized in that: One end of the long rod (5) is provided with a roller.
4. The cam type automatic opening and closing device for the floor door of a construction elevator according to claim 1 is characterized in that: The automatic switch device has a first state. In the first state, the bumper (3) is located in the installation groove of the discharge door (1), and the bumper (3) is pressed on the second spring. The baffle (6) is located on one side of the discharge door (1) to limit the bumper (3) from moving outward.
5. The cam type automatic opening and closing device for the floor door of a construction elevator according to claim 4 is characterized in that: The automatic switch device has a second state. In the second state, the discharge door (1) moves relative to the baffle (6), the baffle (6) releases the restriction on the collision block (3), and the collision block (3) slides in the slide groove (4-1), causing the long rod (5) to rotate and push the layer door (2) to open.
6. The cam type automatic opening and closing device for the floor door of a construction elevator according to claim 5, characterized in that: In the second state, the landing door (2) pulls the first spring (8) through the steel wire rope (9) to be in a tensioned state.