Construction hoist car structure and method

Abstract

The invention relates to the technical field of building hoist car structures and discloses a building hoist car structure and method. The two sides of a car are open. One side of the lengthened frame is used for being detachably connected with the open side of the lift car to lengthen the lift car; a driving mechanism is arranged at the top in the door frame, the output end of the driving mechanism is connected with a transversely-arranged connecting shaft, the two ends of the connecting shaft are matched with chains through chain wheels, a box door capable of being opened in a sliding mode in the vertical direction of the door frame is arranged on the outer side of the door frame, and the ends of the chains are connected with the box door. A pressing plate is arranged at the bottom of the box door; a fixed shaft is arranged at the bottom of the outer side of the door frame, one end of the flap door sleeves the fixed shaft through a sleeve, and a movable rod matched with the pressing plate is arranged on the sleeve; by additionally arranging the linkage small flap gate, the cost for lapping an outer frame of a building is saved; the lift car can be used in two sizes by adding the lengthened frame; the driving structure is installed in the lift car, and damage caused by falling objects from high altitudes can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of construction elevator car structures, in particular to a construction elevator car structure and method. Background Art

[0002] With the rapid development of prefabricated buildings and high-rise and super-high-rise structures, construction elevators are playing an increasingly prominent role in vertical transportation systems. In recent years, to meet the dual requirements of construction efficiency and safety management, the industry has generally integrated intelligent technologies such as PLC control, variable frequency drives, automatic leveling, and remote monitoring into elevator cage roofs, creating the so-called "intelligent cage roof integrated drive platform." This solution has achieved certain results in improving automation and reducing manual intervention, but it has also gradually exposed associated drawbacks, primarily in the following three areas: 1. Limited reuse: Existing intelligent elevators often use fixed cage structures, with internal spaces and door systems designed for a single cargo size or standard construction hopper. Changes during construction (e.g., due to significant size differences in curtain wall units, steel components, or electromechanical equipment) require the entire cage to be replaced. This results in long equipment transfer cycles and high renovation costs, making it impossible to achieve the high reuse requirement of "one machine for multiple uses."

[0003] 2. Reliance on external scaffolding, which is not economical. Traditional construction elevators require double-row or cantilevered scaffolding along the facade of the building to provide guide rail attachment points and personnel passages. However, the erection period of external scaffolding is long and the amount of consumables is large. With the increase in labor and steel costs, the cost of external scaffolding has accounted for 25% to 35% of the cost of elevator use. Some developers even require the cancellation of external scaffolding for cost control. However, the existing cage top centralized drive structure is difficult to meet the stability and safety regulations under scaffolding-free working conditions due to the concentrated force on the guide rails and the limited spacing between attachment points, making it difficult to implement the solution.

[0004] 3. The centralized drive system on the cage top is easily damaged and requires frequent maintenance. Currently, mainstream smart machines integrate the motor, reducer, brake, sprocket / rack transmission mechanism, and electrical control box on the cage top. Concrete slurry, mortar particles, metal welding slag, etc. at the construction site are very likely to fall from a height and directly impact the drive assembly and chain, causing the following problems: (1) The seals of the motor housing and brake fail, the insulation level decreases, and the failure rate increases; (2) The chain grease is contaminated by cement, causing increased wear and tear, requiring manual maintenance every 15 to 20 days; (3) Deformation and cracks caused by the impact of falling objects from high altitude shorten the life of the entire machine from the designed 8 years to 4 to 5 years, significantly increasing the owner's depreciation and replacement costs. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a construction elevator car structure and method. By adding an extended frame, the car can transport large-volume goods. By adding a linked small flap door, the cost of splicing the building's external frame can be saved and construction efficiency can be improved. The drive structure is installed inside the car to effectively protect the drive structure.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, a construction elevator car structure comprises: a car, the sides of which are open; An extension frame, one side of which is used for detachable connection with the open side of the car to achieve car lengthening; The door frame is used for detachable connection with the other side of the extended frame or the open side of the car. A driving mechanism is provided on the top of the door frame. The output end of the driving mechanism is connected to a horizontally arranged connecting shaft. The two ends of the connecting shaft cooperate with the chain through a sprocket. A box door that can be opened by vertically sliding along the door frame is provided on the outside of the door frame. The end of the chain is connected to the box door, and a pressure plate is provided at the bottom of the box door; one group of door frames is provided with a fixed shaft at the bottom of the outside, and one end of the flap door is connected to the fixed shaft through a sleeve. The sleeve is provided with a movable rod that cooperates with the pressure plate. When the box door is opened upward, the pressure plate leaves the movable rod and the flap door opens.

[0007] As a further implementation, the cross-sectional shape of the extension frame is the same as that of the car; and both sides of the extension frame are connected to the door frame and the car respectively through fixing members.

[0008] As a further implementation method, the door frame has a frame structure, which is composed of columns on both sides and a beam connecting the two ends of the columns; the driving mechanism includes a motor installed in the middle position of the top beam; the two ends of the connecting shaft pass through the bearing seat at the top of the column and extend to the inner position of the column and then the sprocket is installed; the connecting shaft cooperates with the output end of the motor to drive the sprocket to rotate.

[0009] As a further implementation method, a slide is vertically provided on the inner side of the column, and a counterweight block is slidably set on the slide. One end of the chain is connected to the counterweight block, and the other end passes around the sprocket and is fixedly connected to the door near the bottom.

[0010] As a further implementation method, an upper limit plate and a lower limit plate are respectively provided on the inner side of the box door near the top and near the bottom; an upper limit switch is provided near the top of the column, and a lower limit switch is provided below the upper limit switch; the stroke control of the box door opening and closing is achieved through the cooperation of the corresponding limit plates and limit switches.

[0011] As a further implementation method, the inner sides of the two groups of columns are open, and a folding edge is provided on the side away from the car, and lower guide wheels are provided on both sides of the box door, which cooperate with the folding edge through the guide wheels; support frames are provided at both ends of the top surface of the top crossbeam of the door frame, and upper guide wheels are provided on the support frames, and the upper guide wheels are used to cooperate with the side of the box door.

[0012] As a further implementation method, support plates are provided at the bottom of the two groups of columns on the side away from the car, fixed shafts are installed between the support plates, the flap door rotates with the fixed shaft through a sleeve, and the movable rod is provided directly below the pressure plate. When the box door is closed, the pressure plate presses down the movable rod, and the flap door rotates and moves close to the box door to be retracted.

[0013] As a further implementation method, the length of the flap door is adapted to the width of the door frame; the flap door is provided on the door frame on the side of the car close to the building, and the flap door is not provided on the door frame on the side away from the building.

[0014] As a further implementation method, a guide wheel is provided on the side of the counterweight block, and the guide wheel cooperates with the slideway, so that the weight of the counterweight block is less than the weight of the box door.

[0015] In a second aspect, a method for operating a construction elevator car structure, using any of the above-described construction elevator car structures, comprises the following steps: The extended frame is installed between the door frame and the car to improve the transportation capacity of the car; when the car is lifted to the specified position, the driving mechanism drives the connecting shaft to rotate, and the connecting shaft drives the door to open and close through the sprocket and chain. When the door is opened, the pressure plate is separated from the movable rod, and under the action of gravity, the flap door rotates to a horizontal state on the fixed shaft through the sleeve. When the door is closed, the pressure plate presses down the movable rod, and the flap door rotates to a nearly vertical state on the fixed shaft through the sleeve.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention can select the extension frame to be connected between the door frame and the car according to the volume of the transported goods, so that the lengthened car can transport larger goods, realizing the high reuse demand of "one machine for multiple uses"; in addition, the box door is linked with the flap door, and the flap door can be synchronously driven to expand and retract by the pressure plate when the box door is opened and closed. The expanded flap door reduces the distance between the door frame and the building to a safe range, and there is no need to set up scaffolding outside the building. It can meet the stability and safety specifications under scaffolding-free working conditions and reduce construction costs.

[0017] 2. The drive structures of the present invention, such as the motor, sprocket, connecting shaft, and chain, are arranged inside the car. Concrete slurry, mortar particles, and metal welding slag at the construction site will not collide with the drive structure when they fall, effectively ensuring the service life of the drive structure.

[0018] 3. The two ends of the chain of the present invention are respectively connected to the counterweight block and the box door. The weight of the counterweight block is less than the weight of the box door. The purpose is to reduce the power of the motor and protect the motor. The setting of the limit switch and the limit plate can ensure that the box door can be opened and closed smoothly. The setting of the guide wheel can ensure that the box door can be smoothly raised and lowered in the vertical plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of a construction elevator car after lengthening in an embodiment of the present invention; Figure 2 This is a front view of the door frame structure in an embodiment of the present invention; Figure 3 is a side view of the door frame structure in a closed state according to an embodiment of the present invention; Figure 4 is a side view of the door frame structure in the open state according to an embodiment of the present invention; Figure 5 This is a partially enlarged schematic diagram of the upper portion of the door frame structure in an embodiment of the present invention; Figure 6 This is a partially enlarged schematic diagram of the lower portion of the door frame structure in an embodiment of the present invention; Figure 7 It is a partial top view schematic diagram of the door frame structure in an embodiment of the present invention.

[0021] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0022] 1. Door frame, 2. Extension frame, 3. Car, 4. Motor, 5. Connecting shaft, 6. Bearing seat, 7. Sprocket, 8. Backstop, 9. Round nut, 10. Limit switch, 11. Limit switch, 12. Chain, 13. Guide wheel, 14. Counterweight, 15. Slide, 16. Door, 161. Upper limit plate, 162. Lower limit plate, 163. Lower guide wheel, 164. Pressure plate, 165. Connecting frame, 166. Connecting cylinder; 17. Flap door, 171. Support plate, 172. Fixed shaft, 173. Movable rod, 18. Support frame, 181. Upper guide wheel. DETAILED DESCRIPTION

[0023] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0024] Example 1 In a typical embodiment of the present invention, referring to Figure 1-Figure 7 As shown, a construction elevator car structure includes a car 3, an extension frame 2 and a door frame 1.

[0025] The car 3 is a box structure with open sides for installing door frames 1. Two sets of door frames 1 are installed on the open sides of the car 3. The door frame 1 on one side is used for people and goods to enter; the door frame 1 on the other side is close to the building. When the door is opened, people and goods can be transferred from the car 3 to the corresponding floor of the building.

[0026] When the size of the goods to be transported is large and the size of the car 3 is not sufficient to transport the large-sized goods, the extension frame 2 can be used to lengthen the car 3 so that the car 3 can transport large-sized goods and meet the customer's needs for transporting large-volume goods. The speed can be adjusted according to the weight of the goods, thereby improving the reuse rate of the equipment.

[0027] like Figure 1 As shown, the cross-section of the car 3 of this embodiment is rectangular. In order to achieve a detachable connection between the extended frame 2 and the open side of the car 3, the cross-sectional shape of the extended frame 2 is the same as the cross-sectional shape of the car 3. The extended frame 2 is a rectangular frame structure, and its four sides are correspondingly connected to the open edges of the car 3. The open side of the car 3 is provided with mounting holes, and corresponding mounting holes are also provided on the extended frame 2. The mounting holes cooperate with bolts to achieve the installation of the extended frame 2 on the car 3.

[0028] It is understood that the door frame also has a frame-like structure, with dimensions corresponding to the dimensions of the car 3 opening. The door frame is also provided with mounting holes for connecting to the side of the extension frame 2 away from the car 3 to close the car opening. The arrangement of the mounting holes on the car 3, the extension frame 2, and the door frame 1 can be determined according to the specific situation, and corresponding mounting holes must be provided on all four sides.

[0029] If the installation space of the construction hoist is limited, or the volume of the loaded cargo is relatively small, the extension frame 2 can be removed and the door frame 1 can be directly connected to the open side of the car 3. Of course, it is also possible to add an extension frame 2 only on one side of the car as needed.

[0030] like Figure 2 As shown, the door frame 1 of this embodiment is a rectangular frame structure, which is welded by columns on both sides and beams (top beam and bottom beam) connecting the two ends of the columns.

[0031] The drive mechanism and the corresponding sprockets and chains are all arranged inside the door frame 1, which solves the problem of easy wear and frequent maintenance of the centralized drive on the cage top, and avoids the problem of chain damage caused by falling objects and cement debris.

[0032] like Figure 2As shown, a drive mechanism is provided at the top of the door frame 1. The drive mechanism includes a motor 4 mounted in the middle of the top crossbeam. Motor 4 is secured to the middle of the bottom surface of the top crossbeam via a mounting bracket. A connecting shaft 5 is provided at the top of the column, below the top crossbeam and parallel to it.

[0033] The output end of the motor 4 and the middle position of the connecting shaft 5 are matched through a bevel gear set to drive the connecting shaft 5 to rotate. The top positions of the left and right columns are provided with bearing seats 6 through a fixed frame structure. The two ends of the connecting shaft 5 pass through the bearing seats 6 and extend to the inner position of the top of the column and then the sprocket 7 is installed; the connecting shaft 5 is fixed to the sprocket 7 through a stop washer 8 and a round nut 9, and the sprocket 7 cooperates with the chain 12.

[0034] The outer side of the door frame (i.e. the side of the door frame away from the car 3) is provided with a box door 16 that can be opened by sliding vertically along the door frame. The box door is a plate-like structure, such as Figure 6 and Figure 7 As shown, the inner side of the column is open and a slide 15 is provided vertically. A counterweight 14 is slidably provided on the slide. A guide wheel 13 is provided on the side of the counterweight 14. The guide wheel 13 cooperates with the slide to enable the counterweight 14 to slide up and down along the slide 15. In other examples, the counterweight 14 can also cooperate with the slide 15 through a slider.

[0035] like Figure 3 and Figure 7 As shown, one end of the chain 12 is connected to the top of the counterweight 14, and the other end is fixedly connected to the box door 16 near the bottom after passing through the sprocket 7. A connecting tube 166 is provided on the inner side of the box door 16 near the bottom. The chain is fixed on the connecting tube 166 and can be fixed by welding or other detachable fixing methods. There is no specific limitation.

[0036] The motor 4 drives the sprocket 7 to rotate through the connecting shaft 5, and the sprocket 7 drives the box door 16 to rise and open through the chain 12. Figure 3 and Figure 4 As shown, when the box door 16 rises, the counterweight 14 correspondingly descends along the slide 15 , and when the box door 16 is closed, the counterweight 14 correspondingly rises along the slide 15 .

[0037] The weight of the counterweight 14 in this embodiment is less than the weight of the door 16 . The purpose of providing the counterweight 14 is to reduce the power of the motor 4 and protect the motor 4 .

[0038] In a preferred example, a guard is added at the position of the chain and sprocket, and the guard is installed on the inner side of the column to effectively protect the drive structure.

[0039] like Figure 7As shown, the left and right columns are provided with folding edges 101 on the side away from the car and in the direction of approaching each other, and the left and right sides of the box door 16 near the lower end are provided with lower guide wheels 163 through a connecting frame 165. The lower guide wheels 163 cooperate with the folding edges 101 to guide the box door 16 when opening and closing.

[0040] like Figure 5 As shown, support frames 18 are provided at both ends of the top surface of the top crossbeam of the door frame. Upper guide wheels 181 are provided on the side close to each other. The upper guide wheels are used to cooperate with the left and right sides of the door to guide the door 16 when it is opened and closed. The upper guide wheels 181 and the folding edges and lower guide wheels 163 ensure that the door 16 can be raised and lowered smoothly in the vertical plane.

[0041] like Figure 5 and Figure 6 As shown, an upper limit plate 161 and a lower limit plate 162 are respectively provided on the inner side of the door (i.e., near the inner side of the car) near the top and bottom. An upper limit switch 10 is provided near the top of the column, and a lower limit switch 11 is provided below the upper limit switch 10. The corresponding limit plates and limit switches cooperate to achieve travel control of the door opening and closing.

[0042] Specifically, when the box door 16 rises to open, the lower limit plate 162 rises until it touches the lower limit switch 11, and the motor 4 stops working; when the box door 16 descends to close, the upper limit plate 161 descends to touch the upper limit switch 10, at which time the box door 16 is closed in place and the motor 4 stops working.

[0043] like Figure 6 As shown, a pressure plate 164 is provided at the bottom end of the door. The pressure plate 164 is vertically arranged, parallel to the door 16, and located on the side of the door 16 away from the building (inside).

[0044] A support plate is provided on the outer side of the bottom of the two groups of columns away from one end of the car, that is, a support plate 171 is provided on the side of the two columns away from each other, and a fixed shaft 172 is installed between the support plates. A sleeve is provided on the fixed shaft 172, and the sleeve is welded to one long side of the rectangular flap door 17. A plurality of groups of movable rods 173 are welded in parallel on the sleeve along the length direction of the sleeve. The movable rod 173 is located on the inner side of the box door 16 and below the pressure plate.

[0045] The flap door 17 can rotate on the fixed shaft 172 through the sleeve. The angle between the movable rod 173 and the flap door 17 is an obtuse angle, so that the flap door 17 can be rotatably arranged outside the box door 16.

[0046] When the door is closed, the pressure plate presses down the movable rod, and the movable rod drives the flap door to rotate counterclockwise through the sleeve. After the door is closed, the flap door is close to the door 16, and the flap door is retracted. Figure 6When the door is opened, the pressure plate leaves the movable rod, the flap door opens, and the unfolding work is completed, as shown in the figure. Figure 4 shown.

[0047] It is understandable that the length of the flap door is adapted to the width of the door frame; since the flap door 17 is provided to meet the requirement of not overlapping the external frame of the building, after the flap door 17 is unfolded, the distance between the door frame 1 and the building can be shortened.

[0048] In this example, the box door is linked to the flap door. When the box door 16 is opened and closed, the flap door can be synchronously driven to expand and retract through the pressure plate. The expanded flap door 17 reduces the distance between the door frame 1 and the building to a safe range. There is no need to set up scaffolding outside the building. The stability and safety specifications under scaffolding-free working conditions can be met, reducing construction costs.

[0049] It is understandable that it is only necessary to set a flap door on the door frame of the car 3 on the side close to the building, and the flap door, support plate 171, and rotating shaft 172 structure are not set on the door frame of the car 3 away from the building.

[0050] Example 2 In a typical embodiment of the present invention, referring to Figure 1-Figure 7 As shown, a working method of a construction elevator car structure, using the construction elevator car structure of embodiment 1, includes the following steps: When transporting small-volume goods, only the door frames 1 need to be connected on both sides of the car 3. When larger-volume goods need to be transported, the door frame 1 on the open side of the car 3 is removed, and the extension frame is installed between the door frame and the car using bolts and other fixings to lengthen the car 3 and improve the car's transportation capacity; so that the car 3 can transport larger-volume goods.

[0051] When the car rises to the specified height under the drive mechanism, the motor 4 drives the connecting shaft 5 to rotate, which in turn rotates the sprocket 7. The chain 12 pulls the door 16 upward, and the counterweight 14 correspondingly descends along the slide 15, completing the door opening step. When the lower limit plate 162 rises until it touches the lower limit switch 11, the motor 4 stops.

[0052] When the door is opened, the pressing plate is separated from the movable rod, and under the action of gravity, the flap door 17 is rotated to a horizontal state on the fixed axis by the sleeve. At this time, people and goods can arrive at the corresponding floor of the building from the car 3.

[0053] When the door is closed, the motor reverses, the door descends, and the upper limit plate 161 descends to touch the upper limit switch 10. At this time, the door 16 is fully closed and the motor 4 stops. During the door's descent, the pressure plate presses down the movable rod, and the flap door rotates on the fixed axis through the sleeve to a nearly vertical state.

[0054] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A construction elevator car structure, characterized in that: include: a car, the sides of which are open; An extension frame, one side of which is used for detachable connection with the open side of the car to achieve car lengthening; The door frame is used for detachable connection with the other side of the extended frame or the open side of the car. A driving mechanism is provided on the top of the door frame. The output end of the driving mechanism is connected to a horizontally arranged connecting shaft. The two ends of the connecting shaft cooperate with the chain through a sprocket. A box door that can be opened by vertically sliding along the door frame is provided on the outside of the door frame. The end of the chain is connected to the box door, and a pressure plate is provided at the bottom of the box door; one group of door frames is provided with a fixed shaft at the bottom of the outside, and one end of the flap door is connected to the fixed shaft through a sleeve. The sleeve is provided with a movable rod that cooperates with the pressure plate. When the box door is opened upward, the pressure plate leaves the movable rod and the flap door opens.

2. A construction elevator car structure according to claim 1, characterized in that: The cross-sectional shape of the extended frame is the same as that of the car; both sides of the extended frame are connected to the door frame and the car through fixing pieces respectively.

3. A construction elevator car structure according to claim 1, characterized in that: The door frame has a frame structure, which consists of columns on both sides and a beam connecting the two ends of the columns; the driving mechanism includes a motor installed in the middle position of the top beam; the two ends of the connecting shaft pass through the bearing seats at the top of the column and extend to the inner position of the column and then the sprocket is installed; the connecting shaft cooperates with the output end of the motor to drive the sprocket to rotate.

4. A construction elevator car structure according to claim 3, characterized in that: A slide is vertically provided on the inner side of the column, and a counterweight is slidably arranged on the slide. One end of the chain is connected to the counterweight, and the other end is fixedly connected to the box door near the bottom after passing through the sprocket.

5. A construction elevator car structure according to claim 3, characterized in that: An upper limit plate and a lower limit plate are respectively provided on the inner side of the box door near the top and near the bottom; an upper limit switch is provided near the top of the column, and a lower limit switch is provided below the upper limit switch; the stroke control of the box door opening and closing is achieved by cooperating with the corresponding limit plates and limit switches.

6. A construction elevator car structure according to claim 5, characterized in that: The inner sides of the two groups of columns are open, and a folding edge is set on the side away from the car. Lower guide wheels are provided on both sides of the box door, which cooperate with the folding edge through the guide wheels; support frames are provided at both ends of the top surface of the top crossbeam of the door frame, and upper guide wheels are provided on the support frames, and the upper guide wheels are used to cooperate with the side of the box door.

7. A construction elevator car structure according to claim 3, characterized in that: A support plate is provided at the bottom of the two groups of columns on the side away from the car, and a fixed shaft is installed between the support plates. The flap door rotates with the fixed shaft through a sleeve, and a movable rod is provided directly below the pressure plate. When the box door is closed, the pressure plate presses down the movable rod, and the flap door rotates and moves close to the box door to be retracted.

8. A construction elevator car structure according to claim 7, characterized in that: The length of the flap door is adapted to the width of the door frame; the flap door is provided on the door frame on the side of the car close to the building, and the flap door is not provided on the door frame on the side away from the building.

9. A construction elevator car structure according to claim 4, characterized in that: A guide wheel is provided on the side of the counterweight block, and the guide wheel cooperates with the slideway, so that the weight of the counterweight block is less than the weight of the box door.

10. A working method for constructing an elevator car structure, characterized in that: The construction elevator car structure according to any one of claims 1 to 9 is adopted, comprising the following steps: The extended frame is installed between the door frame and the car to improve the transportation capacity of the car; when the car is lifted to the specified position, the driving mechanism drives the connecting shaft to rotate, and the connecting shaft drives the door to open and close through the sprocket and chain. When the door is opened, the pressure plate is separated from the movable rod, and under the action of gravity, the flap door rotates to a horizontal state on the fixed shaft through the sleeve. When the door is closed, the pressure plate presses down the movable rod, and the flap door rotates to a nearly vertical state on the fixed shaft through the sleeve.

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