Door opening and closing device of elevator platform

Abstract

The utility model provides a door opening and closing device of an elevator platform, an elevator is provided with a working platform, a movable door of the working platform is connected with a mounting frame, and an opening and closing assembly and a locking assembly are arranged in a matched mode; the opening and closing assembly comprises an air cylinder, and the air cylinder drives the movable door to have a door closing state for closing the working platform and a door opening state for opening the working platform. The locking assembly comprises an electric push rod and a locking hole which are matched with the movable door, and in the door closing state, the electric push rod extends into the locking hole to enable the movable door to be kept in the door closing state. In the device, the opening and closing assembly enables the movable door to be opened and closed under the driving of the air cylinder, and the locking assembly enables the movable door to be further locked when the movable door is closed, so that the safety of the working platform is ensured; and the air cylinder and the electric push rod can be remotely controlled through circuit signals, or automatic opening and closing and state monitoring of the movable door are further achieved through programming, and remote control through a control platform and monitoring of a production site are facilitated.

Description

Technical Field

[0001] The utility model relates to a door opening and closing device for a hoist platform. Background Art

[0002] Material hoists are commonly used equipment in material transfer and production sites. During use, the protective doors of the unloading platform are often not closed or not closed tightly, creating hidden dangers on the edges, threatening the safety of operators and causing safety accidents.

[0003] In the pharmaceutical field, a lifting work platform is needed to lift some materials or equipment. Although the existing work platforms are equipped with movable doors, most of them are opened and closed manually, and they cannot be linked with other equipment. Moreover, their safety depends entirely on the memory of the staff. If they are lifted up without closing the door, the movable door may collide with the goods in the platform, or the items in the door may fall, causing personal or property losses, seriously affecting production safety.

[0004] The applicant previously disclosed a hoist with an automatic opening and closing platform (CN202022201010.5), which includes a column, a power source, a lifting mechanism, a working platform and a control box. The working platform can be lifted and lowered on one side of the column through the lifting mechanism. The lifting mechanism is connected to the power source. The working platform is provided with a movable door. The working platform is provided with a push rod mechanism that can open or close the movable door. The movable door is provided with a door opening detection mechanism and a door closing detection mechanism. The column is provided with a lower limit detection mechanism and a floor position detection mechanism. The control box is respectively connected to the power source, the push rod mechanism, the door opening detection mechanism, the door closing detection mechanism, the lower limit detection mechanism and the floor position detection mechanism. It has high safety. Through the detection of door closing detection and other detections and the interlocking of the action of the working platform rising and falling, it avoids equipment damage and personnel safety problems caused by misoperation or detection switch failure. It has a high degree of automation. The whole process can be controlled by program without manual operation.

[0005] On this basis, the inventor designs the door opening and closing device of the elevator platform to make it more practical. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a door opening and closing device for a hoist platform. The technical solution adopted by this utility model is as follows:

[0007] A door opening and closing device for a hoist platform, the hoist comprises a column, a power source, a lifting mechanism, and a working platform, the lifting mechanism drives the working platform to be raised and lowered relative to the column, the lifting mechanism is connected to the power source, the working platform is provided with a movable door, the movable door is connected to a mounting frame on the working platform, and is cooperated with an opening and closing component and a locking component; the opening and closing component comprises a cylinder arranged between the movable door and the mounting frame, the cylinder drives the movable door to have a closed state of closing the working platform, and an open state of opening the working platform; the locking component comprises an electric push rod and a locking hole arranged between the movable door and the movable door, or, between the movable door and the mounting frame, in the closed state, the electric push rod extends into the locking hole to keep the movable door in the closed state.

[0008] Preferably, the movable door comprises a first movable door and a second movable door which cooperate with each other, the first movable door and the second movable door are connected to a mounting frame on the working platform, and the first movable door and the second movable door are cooperatively provided with an opening and closing assembly and a locking assembly; the opening and closing assembly comprises a cylinder, and the cylinder drives the first movable door and the second movable door to have a relatively closed door-closing state, and a relatively open door-opening state; the locking assembly comprises an electric push rod arranged on the first movable door and a locking hole arranged on the second movable door, and in the closed door state, the electric push rod extends into the locking hole to keep the first movable door and the second movable door in the closed door state.

[0009] Furthermore, an opening and closing assembly is arranged between the mounting frame and the side where the first movable door and the second movable door are far away from each other, and a locking assembly is arranged on the side where the first movable door and the second movable door are close to each other.

[0010] Alternatively, the locking assembly includes an electric push rod arranged on the movable door and a locking hole arranged on the mounting frame. When the door is in a closed state, the electric push rod extends into the locking hole to position and cooperate the movable door and the mounting frame to maintain the closed state.

[0011] Preferably, the mounting frame is rotatably connected to one side of the movable door via a hinge component, so that the movable door can rotate relative to the mounting frame to switch between an open and closed state.

[0012] Preferably, the hinged component includes a short rod and a long rod which are vertically arranged on the movable door, and a first hinged component and a second hinged component which respectively cooperate with the short rod and the long rod to form a hinge; and the bottom of the long rod is positioned on the bottom plate of the working platform; the short rod is located above the long rod, respectively realizing the upper and lower hinges of the side of the movable door and the mounting frame, and one end of the long rod extends into the bottom plate of the working platform to further position it for stability.

[0013] Preferably, the opening and closing assembly comprises a crank and a rocker driven by a cylinder, one end of the rocker is connected to the crank, and the other end is fixedly connected to the side of the movable door.

[0014] Preferably, a proximity switch is provided in the locking hole, and the proximity switch cooperates with the electric push rod. The electric push rod stops moving after hitting the proximity switch, so that the movable door is locked in a closed state; when opening the door, the electric push rod retracts away from the proximity switch, and the cylinder deflates to cause the crank rocker to move to achieve the door opening effect.

[0015] The beneficial effects of the utility model are as follows: the device is equipped with an opening and closing component and a locking component on the movable door and the working platform. The opening and closing component enables the movable door to be opened and closed under the drive of the cylinder, and the locking component further locks the movable door when it is in the closed state, thereby ensuring the safety of the working platform; and both the cylinder and the electric push rod can be remotely controlled through circuit signals, or further realized through programming to realize automatic opening and closing and status monitoring of the movable door, which is conducive to remote control and monitoring of the production site through the control platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0017] Figure 1 This is a schematic diagram of the assembly structure of the mounting frame and the movable door in Example 1;

[0018] Figure 2 Schematic diagram of the door opening state (A) and the door closing state (B) in Example 1;

[0019] Figure 3 This is a schematic diagram of the closed state of the first movable door and the second movable door in Example 1;

[0020] Figure 4 The side view (C) of the cylinder, crank and rocker, and the top view (D) of the cylinder, crank and rocker in Example 1;

[0021] In the figure, 1-movable door, 101-first movable door, 102-second movable door, 21-electric push rod, 22-proximity switch, 31-cylinder, 32-crank, 33-rocker, 34-cylinder bracket, 41-short rod, 42-long rod, 5-mounting frame, 51-first hinged component, 52-second hinged component. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0023] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0024] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0025] Example 1

[0026] like Figure 1-4 As shown, a door opening and closing device for a hoist platform, the hoist includes a column, a power source, a lifting mechanism, and a working platform, the lifting mechanism drives the working platform to be raised and lowered relative to the column, the lifting mechanism is connected to the power source, the working platform is provided with a movable door, the movable door is connected to the mounting frame on the working platform, and is cooperated with an opening and closing component and a locking component; the opening and closing component includes a cylinder 31 arranged between the movable door 1 and the mounting frame 5, the cylinder 31 drives the movable door 1 to have a closed state of closing the working platform, and an open state of opening the working platform; the locking component includes an electric push rod 21 and a locking hole arranged between the movable door and the movable door, or, between the movable door and the mounting frame, when in the closed state, the electric push rod 21 extends into the locking hole to keep the movable door in the closed state.

[0027] The movable door includes a first movable door 101 and a second movable door 102 that cooperate with each other. The first movable door 101 and the second movable door 102 are connected to the mounting frame on the working platform, and the first movable door 101 and the second movable door 102 are cooperated with each other to be provided with an opening and closing assembly and a locking assembly; the opening and closing assembly includes a cylinder 31, and the cylinder 31 drives the first movable door and the second movable door to have a relatively closed door-closing state, and a relatively open door-opening state; the locking assembly includes an electric push rod 21 arranged on the first movable door and a locking hole arranged on the second movable door. In the closed door state, the electric push rod 21 extends into the locking hole to keep the first movable door and the second movable door in the closed door state.

[0028] Furthermore, an opening and closing assembly is arranged between the side where the first movable door 101 and the second movable door 102 are far away from each other and the mounting frame 5 , and a locking assembly is arranged on the side where the first movable door 101 and the second movable door 102 are close to each other.

[0029] The above-mentioned mounting frame 5 is rotatably connected to one side of the movable door 1 through a hinged component, so that the movable door 1 can rotate relative to the mounting frame 5 to realize the switching of the open and closed door states; the hinged component includes a short rod 41 and a long rod 42 vertically arranged on the movable door 1, and a first hinged component 51 and a second hinged component 52 respectively cooperating with the short rod 41 and the long rod 42 to form a hinge; and the bottom of the long rod 42 is positioned on the bottom plate of the working platform; the opening and closing assembly includes a crank 32 and a rocker 33 driven by a cylinder 31, one end of the rocker 33 is connected to the crank 32, and the other end is fixedly connected to the side of the movable door 1.

[0030] Furthermore, a proximity switch 22 is provided in the locking hole, and the proximity switch 22 cooperates with the electric push rod 21, so that the electric push rod stops moving forward and is positioned after hitting the proximity switch, keeping the door closed; when the door needs to be opened, the electric push rod is driven to retract, and after the electric push rod is away from the proximity switch, the cylinder is deflated to cause the crank rocker to move and open the door.

[0031] Door closing state: The cylinder air intake pushes the crank and the rocker forward, and the movement of the crank and the rocker drives the first movable door and the second movable door to rotate relative to the mounting frame (it can also be set to a translational door closing form by adjusting the connecting piece) and close. After closing, the electric push rod on the first movable door is started to extend into the locking hole on the second movable door. When the electric push rod touches the proximity switch, it stops moving forward, reaching the door locking state (locked door closing state);

[0032] Door opening state: the electric push rod is started and retracted until the door lock state is released, the cylinder is deflated to move the crank rocker and drive the first movable door and the second movable door to open.

[0033] The switching between the door closing state and the door opening state is remotely controlled by the circuit, so that the staff can realize the state switching only on the operating table. Furthermore, the door opening state and the locking state of the hoist platform can be monitored by the proximity switch to realize intelligent monitoring of safe production.

[0034] Example 2

[0035] The difference between Example 2 and Example 1 is that the locking assembly includes an electric push rod 21 arranged on the movable door 1 and a locking hole arranged on the mounting frame. When the door is closed, the electric push rod 21 extends into the locking hole to position and cooperate with the movable door and the mounting frame to maintain the closed state.

[0036] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A door opening and closing device for a hoist platform, the hoist comprising a column, a power source, a lifting mechanism, and a working platform, the lifting mechanism driving the working platform to be able to rise and fall relative to the column, the lifting mechanism being connected to the power source, and the working platform being provided with a movable door, characterized in that: The movable door is connected to the mounting frame on the working platform and is provided with an opening and closing component and a locking component; The opening and closing assembly comprises a cylinder (31) arranged between the movable door (1) and the mounting frame (5), wherein the cylinder (31) drives the movable door (1) to have a closed state in which the working platform is closed, and an open state in which the working platform is opened; The locking assembly comprises an electric push rod (21) and a locking hole arranged between the movable doors, or between the movable door and the mounting frame. When the door is in a closed state, the electric push rod (21) extends into the locking hole to keep the movable door in the closed state.

2. The door opening and closing device of a hoist platform according to claim 1, characterized in that: The movable door comprises a first movable door (101) and a second movable door (102) which cooperate with each other, the first movable door (101) and the second movable door (102) are connected to a mounting frame on the working platform, and the first movable door (101) and the second movable door (102) are cooperatively provided with an opening and closing component and a locking component; The opening and closing assembly comprises a cylinder (31), wherein the cylinder (31) drives the first movable door and the second movable door to have a relatively closed door state and a relatively open door state; The locking assembly comprises an electric push rod (21) arranged on the first movable door and a locking hole arranged on the second movable door. When the doors are in a closed state, the electric push rod (21) extends into the locking hole to keep the first movable door and the second movable door in a closed state.

3. The door opening and closing device for a hoist platform according to claim 1, characterized in that: The locking assembly comprises an electric push rod (21) arranged on the movable door (1) and a locking hole arranged on the mounting frame. When the door is in a closed state, the electric push rod (21) extends into the locking hole to position and match the movable door and the mounting frame, thereby maintaining the closed state.

4. The door opening and closing device for a hoist platform according to claim 2, characterized in that: An opening and closing component is arranged between the side where the first movable door (101) and the second movable door (102) are far away from each other and the mounting frame (5), and a locking component is arranged on the side where the first movable door (101) and the second movable door (102) are close to each other.

5. The door opening and closing device for a hoist platform according to claim 2 or 3, characterized in that: The mounting frame (5) is rotatably connected to one side of the movable door (1) via a hinged component, so that the movable door (1) rotates relative to the mounting frame (5) to achieve switching between an open and closed state.

6. The door opening and closing device for a hoist platform according to claim 5, characterized in that: The hinged component comprises a short rod (41) and a long rod (42) vertically arranged on the movable door (1), and a first hinged component (51) and a second hinged component (52) respectively cooperating with the short rod (41) and the long rod (42) to form a hinge; and the bottom of the long rod (42) is positioned on the bottom plate of the working platform.

7. The door opening and closing device for a hoist platform according to claim 5, characterized in that: The opening and closing assembly comprises a crank (32) and a rocker (33) driven by a cylinder (31); one end of the rocker (33) is connected to the crank (32), and the other end is fixedly connected to the side of the movable door (1).

8. The door opening and closing device for a hoist platform according to claim 5, characterized in that: A proximity switch (22) is arranged in the locking hole, and the proximity switch (22) cooperates with the electric push rod (21).

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