A construction hoist linkage door system and a construction hoist

Abstract

This invention provides a construction hoist linkage door system and a construction hoist, relating to the field of construction hoists. Addressing the problem of complex and space-consuming mechanical interlocking structures, this invention installs an electromagnet base and electromagnet at the top of the cage door, and an armature at the top of the fence door. Linkage is achieved through the attraction and release of the electromagnet and armature. Compared to the multiple complex parts of mechanical interlocking, the electromagnetic adsorption structure is simple. Electromagnetic adsorption does not require the large space required for component movement that is necessary in mechanical interlocking. The gap between the cage door and the fence door is reduced, decreasing the horizontal space occupied in the fenced area, allowing for a more compact layout of the construction hoist in limited spaces and improving space utilization.

Description

Technical Field

[0001] This invention relates to the field of construction hoists, and more specifically to a construction hoist linkage door system and a construction hoist. Background Technology

[0002] In construction hoists, the cage is driven by a drive system to move along a track to achieve lifting and lowering. A fence is installed at the bottom of the cage to protect the cage when it is at its lowest position. A fence door is installed on the side of the cage door. When the cage door is opened, the fence door can be unlocked and opened. When the cage door is closed or the cage is raised, the fence door remains locked to prevent personnel or objects from entering the fence and interfering with the operation of the cage.

[0003] Currently, by installing a control assembly between the cage door and the fence door, the cage door can move under the drive of the door drive motor. The self-locking hook and interlocking hook of the control assembly can link the cage door and the fence door, enabling them to rise and fall synchronously, thus opening and closing the cage door and the fence door. It uses an interlocking hook and an interlocking crossbar seat to remain locked when the cage door and the fence door are lowered. However, it still uses a mechanical linkage method, and the interlocking structure of the control assembly occupies a significant amount of horizontal space, resulting in a larger gap between the cage door and the fence door, increasing the footprint of the fenced area. Furthermore, the working status identification of the mechanical interlocking structure requires additional detection elements, further increasing the structural complexity of the interlocking position, demanding high precision in parts processing, and consequently increasing the manufacturing and assembly difficulties. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a construction hoist linkage door system and a construction hoist. An electromagnet base and electromagnet are installed at the top of the cage door, and an armature is installed at the top of the fence door. The linkage is achieved through the attraction and release of the electromagnet and the armature. Compared with the multiple complex parts of mechanical interlocking, electromagnetic adsorption has a simple structure. Electromagnetic adsorption does not require the large space for parts to move as in mechanical interlocking. The gap between the cage door and the fence door is reduced, which reduces the horizontal space occupied in the fence area, making the construction hoist layout more compact in limited space and improving space utilization.

[0005] The first objective of this invention is to provide a construction hoist linkage door system, which adopts the following solution: include: The cage door is slidably mounted on the cage. An electromagnet base is installed at the top of the cage door, and an electromagnet is installed on the electromagnet base. The cage door is equipped with a drive motor for driving the cage door to rise and fall relative to the cage. The fence gate is slidably installed on the fence. The fence gate and the cage door are distributed alternately. An armature is installed at the top of the fence gate. The electromagnet base extends above the armature, so that the electromagnet can attract or release the armature, thereby driving the fence gate to rise and fall synchronously with the cage door or the cage door to operate independently.

[0006] Furthermore, a pull rod is slidably installed on the fence gate, and a spring abuts against the fence gate. One end of the pull rod is provided with a stop block, and the other end is connected to an armature.

[0007] Furthermore, the fence gate is provided with a perforated plate. One end of the pull rod passes through the perforated plate and a stop block is provided thereafter. The spring moves upward along the pull rod axis, with one end abutting against the perforated plate and the other end abutting against the armature. When the electromagnet attracts the armature and lifts the pull rod, the stop block abuts against the perforated plate to drive the fence gate to move.

[0008] Furthermore, the electromagnet base includes an L-shaped bent plate, one side of which is connected to the cage door, and the other side extends above the armature and is on which the electromagnet is installed.

[0009] Furthermore, a rib is installed on the bending plate, with one side of the rib connected to one side of the bending plate and the other side connected to the other side of the bending plate.

[0010] Furthermore, the cage is equipped with a first proximity switch and a second proximity switch, and the first cage door is equipped with a first protrusion and a second protrusion. When the cage door is in the closed state, the first protrusion triggers the first proximity switch, and when the cage door is in the open state, the second protrusion triggers the second proximity switch.

[0011] Furthermore, the first proximity switch and the second proximity switch are distributed at intervals along the vertical direction, and the first protrusion and the second protrusion are distributed at intervals along the vertical direction.

[0012] Furthermore, the sliding direction of the cage door is parallel to the sliding direction of the fence door.

[0013] A second objective of the present invention is to provide a construction hoist that utilizes a construction hoist linkage door system as described in the first objective.

[0014] Furthermore, the cage has a box-shaped structure, with the cage door located at one end of the cage, and the fence has a U-shaped structure, with the fence door located on the side of the fence closer to the cage door.

[0015] Compared with the prior art, the advantages and positive effects of this invention are: To address the issue of complex and space-consuming mechanical interlocking structures, an electromagnet base and electromagnet are installed at the top of the cage door, and an armature is installed at the top of the fence door. The linkage is achieved through the attraction and release of the electromagnet and the armature. Compared with the multiple complex parts of mechanical interlocking, the electromagnetic adsorption structure is simple. Electromagnetic adsorption does not require the large space reserved for the movement of parts as in mechanical interlocking. The gap between the cage door and the fence door is reduced, which reduces the horizontal space occupied in the fence area. This allows the construction hoist to be laid out more compactly in a limited space, improving space utilization.

[0016] To address the issue of needing additional detection elements to monitor the working status of mechanical interlocking structures, an electromagnet is used in conjunction with an armature to achieve linkage. The working status of the electromagnet, such as energization and engagement, and de-energization and release, can be directly obtained through parameters such as current and voltage in the detection circuit. This eliminates the need for additional complex mechanical detection elements, simplifies the working status identification process, reduces system complexity and cost, and improves the accuracy and reliability of monitoring.

[0017] The combination of the pull rod and spring on the gate forms an adaptive buffer mechanism. When the electromagnet attracts the armature, the spring is compressed, absorbing the instantaneous impact force during the lifting and lowering of the cage door, preventing damage to parts caused by rigid collisions. When the cage door descends rapidly, pulling the gate along, the spring can mitigate sudden changes in tension through elastic deformation, extending the service life of components such as the pull rod and armature. The cooperation between the stop block and the perforated plate ensures that the pull rod will not disengage when pulling the gate. When the electromagnet attracts the armature and lifts the pull rod, the stop block abuts against the perforated plate, forming a stable force transmission path, ensuring that the gate rises and falls synchronously with the cage door, preventing linkage failure due to pull rod slippage, and improving the stability and reliability of the system operation. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a structural schematic diagram of a construction hoist linkage door system in one or more embodiments of the present invention.

[0020] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0021] Among them, 1. cage; 2. cage door; 3. fence door; 4. pull rod; 5. spring; 6. electromagnet; 7. electromagnet base; 8. drive motor; 9. first proximity switch; 10. first protrusion; 11. second proximity switch; 12. second protrusion; 13. armature. Detailed Implementation

[0022] Example 1 In a typical embodiment of the present invention, such as Figures 1-2 As shown, a construction hoist linkage door system is presented.

[0023] Existing construction hoist linkage door systems mostly employ mechanical linkage. Mechanical interlocking, using self-locking hooks, interlocking hooks, and interlocking crossbar seats, occupies significant horizontal space, resulting in a large gap between the cage door 2 and the fence door 3. This increases the footprint of the fenced area, limiting the site adaptability and space utilization efficiency of the construction hoist. Furthermore, the mechanical interlocking structure requires the cooperation of multiple parts with complex connections, demanding high machining precision and strict control of dimensional tolerances during manufacturing. Precise adjustment of each component's position during assembly further increases manufacturing and assembly difficulty and cost. Additionally, monitoring the working status of the mechanical interlocking structure requires additional detection elements, further increasing structural complexity, cost, and potentially reducing system reliability due to component failure. Therefore, this embodiment provides a construction hoist linkage door system that uses electromagnet 6 and armature 13 to achieve linkage between the cage door 2 and the fence door 3. This allows the cage door 2 to simultaneously lift and open or lower and close the fence door 3 when it is in position, meeting the operational requirements during loading and unloading.

[0024] like Figures 1-2 As shown, the construction hoist linkage door system includes a cage door 2, a fence door 3, and an electromagnet 6. The cage door 2 is slidably installed on the cage 1. The cage door 2 is equipped with a drive motor 8 for driving the cage door 2 to rise and fall relative to the cage 1. It can slide and rise and fall vertically relative to the main body of the cage 1. The fence door 3 is slidably installed on the fence and can slide and rise and fall vertically relative to the main body of the fence. The fence door 3 and the cage door 2 are distributed at intervals.

[0025] An electromagnet base 7 and an electromagnet 6 are installed at the top of the cage door 2, and an armature 13 is installed at the top of the fence door 3. The electromagnet base 7 extends above the armature 13, allowing the electromagnet 6 to attract or release the armature 13. The attraction and release of the electromagnet 6 and the armature 13 achieve linkage, enabling the fence door 3 to rise and fall synchronously with the cage door 2 or for the cage door 2 to operate independently. Compared to the multiple complex parts of mechanical interlocking, the electromagnetic adsorption structure is simple, requiring only an electromagnetic component and an armature 13, reducing the number of parts and connections, and lowering structural complexity.

[0026] Electromagnetic adsorption eliminates the need for the large space required for component movement that mechanical interlocking requires. This significantly reduces the gap between the cage door 2 and the fence door 3, minimizing horizontal space occupation within the fenced area. This allows for a more compact layout of the construction hoist in limited spaces, improving space utilization. The operating status of the electromagnet 6 (energized and de-energized) can be directly obtained from parameters such as current and voltage in the detection circuit, eliminating the need for additional complex mechanical detection components. This simplifies the operating status identification process, reduces system complexity and cost, and simultaneously improves the accuracy and reliability of monitoring.

[0027] like Figure 1 As shown, a pull rod 4 is slidably mounted on the fence gate 3, and a spring 5 abuts against the pull rod 4 and the fence gate 3. One end of the pull rod 4 is equipped with a stop block, and the other end is connected to an armature 13. The pull rod 4 and the spring 5 on the fence gate 3 combine to form an adaptive buffer mechanism. When the electromagnet 6 attracts the armature 13, the spring 5 is in a compressed state, which can absorb the instantaneous impact force during the lifting and lowering of the cage gate 2, avoiding damage to parts caused by rigid collisions. When the cage gate 2 descends, the electromagnet 6 contacts the armature 13 and pushes the pull rod 4 to move to compress the spring 5. The spring 5 can mitigate the rigid collision caused by the sudden change in thrust through elastic deformation, extending the service life of components such as the pull rod 4 and the armature 13.

[0028] The fence gate 3 is equipped with a perforated plate. One end of the pull rod 4 passes through the perforated plate and a stop block is installed thereon. The spring 5 moves upward along the axis of the pull rod 4, with one end abutting against the perforated plate and the other end abutting against the armature 13. When the electromagnet 6 attracts the armature 13 and lifts the pull rod 4, the stop block abuts against the perforated plate to move the fence gate 3. The cooperative design of the stop block and the perforated plate ensures that the pull rod 4 will not disengage when the fence gate 3 is pulled. When the electromagnet 6 attracts the armature 13 and lifts the pull rod 4, the stop block abuts against the perforated plate, forming a stable force transmission path, ensuring that the fence gate 3 rises and falls synchronously with the cage door 2, preventing linkage failure due to the pull rod 4 slipping out, and improving the stability and reliability of the system operation.

[0029] like Figure 2 As shown, the electromagnet base 7 includes an L-shaped bent plate. One side of the bent plate is connected to the cage door 2, and the other side extends above the armature 13 and mounts the electromagnet 6. The L-shaped bent plate extends the mounting position of the electromagnet 6 above the armature 13, ensuring effective attraction between the electromagnet 6 and the armature 13 while making the connection between the electromagnet base 7 and the cage door 2 more compact. Compared with the traditional mechanical linkage structure, this reduces the lateral space occupied, further narrows the gap between the cage door 2 and the fence door 3, and optimizes the space utilization of the construction hoist fence area.

[0030] Ribs are installed on the bending plate, with one side of the rib connected to one side of the bending plate and the other side connected to the other side. The ribs added to the bending plate enhance the overall rigidity of the electromagnet base 7 through the principle of triangular stability. During the frequent engagement and disengagement of the electromagnet 6, the ribs can effectively disperse stress, preventing the bending plate from deforming under stress and affecting the attraction accuracy between the electromagnet 6 and the armature 13, thus ensuring the long-term stable operation of the linkage door system.

[0031] In this embodiment, the L-shaped bending plate enables the electromagnet 6 to be precisely positioned above the armature 13, ensuring that the magnetic force generated by the electromagnet 6 can effectively attract the armature 13, thereby realizing the linkage between the cage door 2 and the fence door 3.

[0032] A first proximity switch 9 and a second proximity switch 11 are installed on the cage 1, and a first protrusion 10 and a second protrusion 12 are installed on the first cage door 2. When the cage door 2 is closed, the first protrusion 10 triggers the first proximity switch 9; when the cage door 2 is open, the second protrusion 12 triggers the second proximity switch 11. The first proximity switch 9 and the second proximity switch 11 on the cage 1, together with the first protrusion 10 and the second protrusion 12 on the cage door 2, enable precise monitoring of the closed and open states of the cage door 2. When the cage door 2 is closed, the first protrusion 10 triggers the first proximity switch 9, sending a "door closed" signal to the control system; when open, the second protrusion 12 triggers the second proximity switch 11, sending a "door open" signal. This dual-position monitoring mechanism avoids misjudgments due to a single sensor malfunction, improving system safety.

[0033] The proximity switches and protrusions are distributed vertically at intervals. On the one hand, this makes full use of vertical space and avoids occupying horizontal space, which meets the requirements of compact system design. On the other hand, the vertical layout makes the monitoring structure less susceptible to interference from external debris, ensuring the accuracy and stability of the monitoring signal.

[0034] The sliding direction of the cage door 2 is parallel to that of the fence door 3, ensuring that the forces acting on both are aligned during the linkage process, reducing friction and mechanical wear caused by inconsistent directions. During synchronous lifting and lowering, parallel sliding reduces the lateral stress between the tie rod 4 and the fence door 3, making the linkage smoother and further improving the system's operating efficiency and service life.

[0035] To determine whether electromagnet 6 is attracted to armature 13, non-contact status identification can be achieved by monitoring the characteristic changes in current and voltage of electromagnet 6.

[0036] In the energized and engaged state, when electromagnet 6 is energized, a current is generated in the coil, forming a magnetic field that attracts armature 13. At this time, the presence of current in the detection circuit (or whether the current reaches a preset threshold) can determine whether electromagnet 6 is in the engaged state.

[0037] In the de-energized release state, when electromagnet 6 is de-energized, the coil current disappears, the magnetic field weakens, and armature 13 is released under the action of external forces such as spring 5. At this time, the current in the circuit is zero (or below the threshold), which indicates that electromagnet 6 is in the released state.

[0038] Example 2 In another typical embodiment of the present invention, such as Figures 1-2 As shown, a construction hoist is provided, which utilizes the construction hoist linkage door system as in Example 1.

[0039] A construction hoist, the core of which lies in utilizing the construction hoist linkage door system as shown in Example 1, The construction hoist cage 1 adopts a box-type structure, which has good stability and load-bearing capacity, providing a safe and reliable transportation space for construction personnel and materials. Its enclosed design effectively prevents personnel or goods from accidentally falling during lifting, improving safety. At the same time, the regular shape of the box-type structure facilitates the installation of the cage door 2 and the arrangement of the sliding track, allowing the cage door 2 to run smoothly along the track. It also precisely cooperates with components such as the electromagnet base 7 and proximity switches in the linkage door system, ensuring accurate identification and control of the opening and closing status of the cage door 2.

[0040] The fence is designed in a U-shape, forming a circular enclosure around the bottom of the gondola 1. This effectively isolates the space under the gondola 1, preventing personnel or objects from entering the danger zone during gondola 1's ascent and descent. The fence door 3 is located near the gondola door 2, corresponding to its position, allowing for synchronized opening and closing via a linkage system. The integrity of the U-shape and the precise layout of the fence door 3 maximize the protective function of the linkage system, ensuring that the fence door 3 is only allowed to open when the gondola 1 is stopped and the gondola door 2 is safely closed, effectively preventing accidents.

[0041] The relative positioning design of the cage door 2 and the fence door 3 allows the electromagnet base 7 to extend above the armature 13, ensuring effective attraction between the electromagnet 6 and the armature 13. When the cage door 2 moves under the drive of the drive motor 8, the electromagnet 6 attracts or releases the armature 13, thereby driving the fence door 3 to rise and fall synchronously, realizing the linkage control between the two. This precise positional correspondence reduces the problems of attraction failure or poor linkage caused by installation deviations, improving the reliability and stability of the linkage door system.

[0042] The combination of the box-type hoisting cage 1 and the loop-shaped fence, along with the control logic of the linkage door system, constructs a dual safety protection mechanism. When the hoisting cage door 2 is closed, the fence door 3 automatically locks, preventing personnel from entering the fenced area; when the hoisting cage door 2 is open, the fence door 3 unlocks simultaneously, facilitating the entry and exit of personnel and materials. The coordinated action of both is ensured by the electromagnetic adsorption and status monitoring structure of the linkage door system (such as proximity switches, pull rods 4, and springs 5), ensuring the timeliness and accuracy of the protective function and providing a solid guarantee for the safe operation of the construction hoist.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction hoist linkage door system, characterized in that, include: The cage door is slidably mounted on the cage. An electromagnet base is installed at the top of the cage door, and an electromagnet is installed on the electromagnet base. The cage door is equipped with a drive motor for driving the cage door to rise and fall relative to the cage. A gate is slidably mounted on a fence, with the gate and cage door spaced apart. An armature is installed at the top of the gate, and an electromagnet base extends above the armature, allowing the electromagnet to attract or release the armature, thus driving the gate to move synchronously with the cage door or for the cage door to move independently. A pull rod is slidably mounted on the gate, with a spring abutting against the gate. One end of the pull rod has a stop block, and the other end is connected to the armature. A perforated plate is provided on the gate, and one end of the pull rod passes through the perforated plate and is positioned at the stop block. The spring moves upward along the pull rod axis, with one end abutting against the perforated plate and the other end abutting against the armature. When the electromagnet attracts the armature and lifts the pull rod, the stop block abuts against the perforated plate, causing the gate to move.

2. The construction hoist linkage door system as described in claim 1, characterized in that, The electromagnet base includes an L-shaped bent plate, one side of which is connected to the cage door, and the other side extends above the armature and is on which the electromagnet is installed.

3. The construction hoist linkage door system as described in claim 2, characterized in that, Ribs are installed on the bending plate, with one side of the ribs connected to one side of the bending plate and the other side connected to the other side of the bending plate.

4. The construction hoist linkage door system as described in claim 1, characterized in that, The cage is equipped with a first proximity switch and a second proximity switch. The first cage door is equipped with a first protrusion and a second protrusion. When the cage door is closed, the first protrusion triggers the first proximity switch. When the cage door is open, the second protrusion triggers the second proximity switch.

5. The construction hoist linkage door system as described in claim 4, characterized in that, The first proximity switch and the second proximity switch are distributed at intervals along the vertical direction, and the first protrusion and the second protrusion are distributed at intervals along the vertical direction.

6. The construction hoist linkage door system as described in claim 4 or 5, characterized in that, The direction of sliding movement of the cage door is parallel to the direction of sliding movement of the fence door.

7. A construction hoist, characterized in that, The construction hoist linkage door system as described in any one of claims 1-6 is used.

8. The construction hoist as described in claim 7, characterized in that, The cage has a box-shaped structure, with the cage door located at one end. The fence has a U-shaped structure, with the fence door located on the side of the fence closest to the cage door.

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