Foldable electric telescopic ladder for tobacco barns

Abstract

The utility model relates to a folding electric telescopic ladder for tobacco house convenient to adjust height, including chassis, vertical frame, inclined shelf, chassis is a plurality of chassis unit power drive mechanism and is spliced by detachable insertion mode, forms the structure of adjustable length, can install vertical frame on every chassis unit through detachable insertion mode, and the height of vertical frame on each chassis unit is different, inclined shelf is telescopic long frame, and it sets up obliquely, and is supported through vertical frame of different height, and the highest vertical frame is the height of the ladder, according to the height of the ladder needed, selects the corresponding highest vertical frame, and adaptively stretches inclined shelf to corresponding length, still splices the chassis of corresponding length, forms the splicing structure of adjustable height of ladder, is equipped with ladder step piece on inclined shelf, and ladder step piece can slide up and down along inclined shelf through power drive mechanism, forms the ladder step structure that need not person to climb, the utility model reaches the beneficial effect is: can adjust height, and the versatility is strong, and the climbing is easy, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the technical field of ladders for tobacco rooms, and in particular to a foldable electric telescopic ladder for tobacco rooms that is easy to adjust in height. Background Technology

[0002] Liangshan Prefecture in Sichuan Province is one of the important tobacco-producing areas in the province. After the tobacco leaves are harvested, the main stem diameter needs to be cut open and the leaves hung in rows to dry. During the hanging process, the heights of the different rows are different, so stairs are needed to hang the tobacco leaves in the higher rows at the appropriate heights.

[0003] Currently, the most commonly used staircase is the A-frame ladder, frequently seen in building construction. However, the hanging height of tobacco in different tobacco drying rooms varies, with some hanging it particularly high. This results in different heights of A-frame ladders being used for each tobacco drying room—necessitating the custom-made A-frame ladders of specific heights (i.e., the A-frame ladders are not very versatile), leading to high costs. Furthermore, each row of tobacco leaves is quite heavy, and it is very strenuous for people to climb up the A-frame ladder while holding the tobacco leaves at both ends.

[0004] Therefore, our company has developed a highly versatile folding telescopic ladder that can easily hang tobacco leaves. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a foldable electric telescopic ladder for smoke rooms that is easy to adjust in height, thus solving the problems of the current A-frame ladders being unable to adjust in height and the difficulty of climbing and separating.

[0006] The purpose of this utility model is achieved through the following technical solution: a foldable electric telescopic ladder for tobacco rooms with adjustable height, including a base frame, a vertical frame, and a diagonal frame; The base frame is composed of multiple base frame units spliced ​​together by a detachable plug-in method to form an adjustable length structure; Each of the aforementioned base frame units can be fitted with a vertical frame via a detachable insert method, and the height of the vertical frame on each base frame unit is different; The inclined frame is a telescopic long frame that is inclined and supported by vertical frames of different heights, with the highest vertical frame being the height of the ladder. Based on the required ladder height, select the tallest vertical frame, and adaptably stretch the diagonal frame to the corresponding length, and also splice the corresponding length of the base frame to form a splicing structure with adjustable ladder height; The inclined frame is equipped with step components, which can slide up and down along the inclined frame through a power drive mechanism, forming a step structure that does not require people to climb.

[0007] As a preferred technical solution of this application, the inclined frame has a sliding groove, and the step component is installed in accordance with the sliding groove through an auxiliary wheel; the step component is connected to the first pull rope, and the first pull rope is connected to the forward and reverse self-locking motor after passing around the pulley; the forward and reverse self-locking motor is fixed on the base frame, and the pulley is fixed at the higher end when the inclined frame is tilted.

[0008] Furthermore, when the inclined frame is set at an angle, a fall arrestor is fixedly installed at its higher end, and the fall arrestor is connected to the ladder step via a second pull rope.

[0009] As a preferred technical solution of this application, the inclined frame is welded from rectangular steel pipes. The inclined frame is a rectangular frame formed by inserting two U-shaped frames. The two U-shaped frames are inserted to different depths, thus forming an adjustable telescopic structure for the length of the inclined frame. A round steel pipe section is welded to the lower inclined surface of the inclined frame. Multiple support holes B are opened at the upper end of the vertical frame. Support pins are inserted into the round steel pipe section and the support holes B to form a support and locking structure between the vertical frame and the inclined frame.

[0010] Furthermore, the lower end of the vertical frame is a plug A, and the base frame has a corresponding socket A, which is inserted and fixed into the plug A.

[0011] As a preferred technical solution of this application, in the base frame: the base frame unit is a horizontal rectangular frame with rollers at the bottom, and one end of it has a socket B and the other end has a plug B along its left and right length direction; multiple base frame units are spliced ​​together left and right through the socket B and the plug B, and the plug B and the socket B are locked together through the corresponding pin holes B and pins B.

[0012] As a preferred technical solution of this application, the step component is equipped with a lifting pedal switch and a lowering pedal switch, both of which are electrically connected to the power drive mechanism through a control panel.

[0013] Furthermore, a relay switch A is provided on the line connecting the lifting pedal switch and the control panel. The relay switch A is electrically connected to the upper limit switch A, which is installed at the upper end of the inclined frame. A relay switch B is provided on the line connecting the lowering pedal switch and the control panel. The relay switch B is electrically connected to the lower limit switch B, which is installed at the lower end of the inclined frame.

[0014] As a preferred technical solution of this application, a handrail is fixed on the step component.

[0015] This utility model has the following advantages: (1) Height adjustable, highly versatile (no special customization required); When different smoke rooms have different heights, a ladder can be assembled to the required height using extendable diagonal frames, adjustable base frames, and vertical frames of different heights, without the need for special customization; (2) Climbing is easy; The sliding mechanism of the tobacco rack is driven by a self-locking motor, which makes it easy and convenient for people to climb (suitable for saving effort when hanging tobacco leaves). (3) Low cost; The entire ladder is made using a steel pipe welding machine, and only a forward and reverse self-locking motor needs to be purchased. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 To use the vertical plane as the section plane Figure 1 A structural diagram of the rear part after being cut into two parts; Figure 3 for Figure 2 Enlarged view of AA; Figure 4 for Figure 2 Enlarged image of BB; Figure 5 for Figure 2 A schematic diagram of the structure after removing the first and second pull ropes; Figure 6 This is an exploded view of the present invention (with the first and second pull ropes removed). Figure 7 This is a schematic diagram of the upper part of the inclined frame; Figure 8 This is a schematic diagram of the vertical frame structure; Figure 9 This is a structural schematic diagram of the base frame unit; In the diagram: 10-base frame, 11-base frame unit, 12-roller, 20-vertical frame, 30-slanted frame, 31-slide groove, 32-round steel pipe section, 40-step component, 41-first pull rope, 42-pulley, 43-positive and negative self-locking motor, 44-fall arrestor, 45-second pull rope, 46-handrail frame. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0018] It should be noted that the vast majority of tobacco leaves purchased by tobacco companies are dried tobacco leaves acquired from individual tobacco farmers. Farmers typically harvest tobacco leaves from the fields and then dry them in tobacco barns through methods such as air-drying, sun-drying, or baking. During the drying process in the barns, the tobacco leaves need to be hung in multiple rows at different heights. Since some rows are quite high, A-frame ladders are usually required. However, because the height of each tobacco barn varies, the height of the hung tobacco leaves also differs. Therefore, commercially available A-frame ladders (with a fixed height) are not suitable for each household's tobacco barn (farmers often custom-make special A-frame ladders). Furthermore, the process of hanging the tobacco involves people holding each row of leaves at both ends and then climbing the A-frame ladders—a particularly strenuous task.

[0019] Therefore, this solution offers the following approach: design the A-frame ladder as an assembly structure, which can be assembled to form different heights to meet the needs of hanging cigarettes in different smoke rooms (high versatility); in addition, design the ladder to automatically rise and fall, so that people do not need to climb—it can automatically rise and fall, thereby reducing the labor intensity of people.

[0020] The present invention will be further illustrated below through specific embodiments (it should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of the present invention can be combined with each other).

[0021] See Figures 1-9 As shown, this specific embodiment provides a height-adjustable folding electric telescopic ladder for smoke rooms, including a base frame 10, a vertical frame 20, and a diagonal frame 30; The base frame 10 can be a single base frame unit 11 or multiple base frame units 11 assembled by a detachable plug-in method, thus forming a structure with an adjustable length of the base frame; and, on each base frame unit 11, a vertical frame 20 is also installed by a detachable plug-in method, and the height of the vertical frame 20 on each base frame unit 11 is different. The inclined frame 30 is a telescopic long frame. The inclined frame 30 is set at an angle so that the lower end (lower end) of the inclined frame 30 is fixed to one end of the base frame 10 (for example, it can be a welding machine). When the inclined frame 30 is tilted, it is supported by vertical frames 20 of different heights. The height of the ladder is determined by the height of the highest vertical frame 20. Therefore, depending on the situation of different smoke rooms and the required height for hanging cigarettes, the corresponding ladder height is selected, that is, the highest vertical frame 20 is selected, and the inclined frame 30 is stretched to the corresponding length, and the corresponding length of the base frame 10 is spliced ​​together to form a ladder of the corresponding height. In addition, a sliding step 40 is provided on the inclined frame 30. The step 40 can slide up and down along the inclined frame 30 through a power drive mechanism. People can step on the step 40 to achieve lifting and lowering without having to climb, which is very simple and convenient.

[0022] Furthermore, in this embodiment, a lift pedal switch and a lower pedal switch are installed on the step component 40. Both the lift pedal switch and the lower pedal switch are electrically connected to the power drive mechanism via a control panel. During operation, when a person steps on the lift pedal switch, the step component 40 slides upward along the inclined frame 30—achieving an effect similar to climbing a ladder; when a person steps on the lower pedal switch, the step component 40 slides downward along the inclined frame 30—achieving the effect of climbing down a ladder.

[0023] It should be noted that, in order to save costs and simplify the structure as much as possible, the base frame 10, vertical frame 20, and diagonal frame 30 are all welded from rectangular steel pipes.

[0024] The following section provides further explanation of the structure of the diagonal frame and the installation of the diagonal frame and the vertical frame.

[0025] See Figure 5 , Figure 6 , Figure 7 The inclined frame 30 is a rectangular steel tube, comprising two U-shaped frames, which are inserted together to form a rectangular frame (i.e., the inclined frame 30). By inserting the two U-shaped frames to different depths, an adjustable telescopic structure is formed. Furthermore, the front and rear steel tubes of the inclined frame 30 have recessed grooves on opposite sides—these grooves are sliding grooves 31, within which the step member 40 slides.

[0026] For example, in the two U-shaped frames of the inclined frame 30: (1) the lower U-shaped frame includes a front steel pipe and a rear steel pipe, which are inclined and connected at their lower ends by a horizontal steel pipe; (2) the upper U-shaped frame includes a corresponding front steel pipe and a rear steel pipe, which are inclined and connected at their upper ends by a corresponding horizontal steel pipe. The front and rear steel pipes of the upper U-shaped frame are made of smaller steel pipes (or extruded into even smaller steel pipes). The lower ends of the front and rear steel pipes of the upper U-shaped frame are adapted to be inserted into the upper ends of the front and rear steel pipes of the lower U-shaped frame to form a telescopic structure.

[0027] See Figure 6 and Figure 7 The installation structure of the inclined frame 30 and the vertical frame 20 is as follows: round steel pipe sections 32 are welded to the lower surface of the upper end of the front and rear steel pipes in the lower U-shaped frame, and corresponding round steel pipe sections 32 are welded to the lower surface of the upper end of the front and rear steel pipes in the upper U-shaped frame; multiple support holes B are opened at the upper end of each vertical frame 20, and support pins are inserted into the round steel pipe sections 32 and the support holes B, thus forming a support and locking structure between the vertical frame and the inclined frame.

[0028] The following section provides further explanation of the structure of the base frame and the installation of the base frame and the vertical frame.

[0029] See Figure 5 , Figure 6 The base frame structure is as follows: the base frame unit 11 is a horizontal rectangular frame, with rollers 12 at the bottom of the base frame unit 11, and corresponding sockets B and plugs B at the left and right ends of the base frame unit 11, respectively. When multiple base frame units 11 are spliced ​​together, the multiple base frame units 11 are connected left and right through the sockets B and plugs B (the sockets B are the original end face shape of the rectangular steel pipe, and the plugs B are pressed into a smaller rectangular cross section, the two are interference fit - but can be disassembled).

[0030] Furthermore, the installation structure of the vertical frame and the base frame is as follows: the lower end of the vertical frame 20 is a plug A (the plug A is a steel pipe with its end face extruded into a smaller rectangle), and a short steel pipe section is welded vertically upward on the base frame 10. The upper end of the short steel pipe section is the socket A (the corresponding short steel pipe is welded to form a corresponding socket). The plug A and the socket A are inserted into each other.

[0031] The following section provides further explanation of the installation of the ladder components on the inclined frame.

[0032] See Figure 2 , Figure 3 , Figure 4 , Figure 7 The inclined frame 30 has recessed grooves 31 on its front and rear opposing surfaces. The step component 40 is fitted into the grooves 31 via auxiliary wheels. The step component 40 is connected to a first pull rope 41, which is then connected to a forward / reverse self-locking motor 43 after passing over a pulley 42. The forward / reverse self-locking motor 43 is fixed to the base frame 10, and the pulley 42 is fixed to the higher end of the inclined frame 30 when it is tilted. During operation, the forward / reverse self-locking motor 43 drives the step component 40 to slide up and down along the grooves 31 of the inclined frame 30.

[0033] Further, see Figure 2 When the inclined frame 30 is set at an angle, a fall arrestor 44 is also fixedly installed at its higher end (the fall arrestor itself is existing equipment and can be purchased directly). The fall arrestor 44 is connected to the step component 40 via the second pull rope 45. During operation, this prevents the step component 40 from falling sharply due to the failure of the forward and reverse self-locking motor 43, thus improving safety.

[0034] It should be noted that the step components can have various structures (as long as they can achieve the functions of this solution). For example, it can include a front inclined plate and a rear inclined plate, with the two inclined plates positioned opposite each other, their upper ends connected by multiple upper connecting rods, and their lower ends connected by multiple lower connecting rods; a horizontal step frame (made of multiple steel pipes welded into a rectangular frame) is provided at the lower end of the two inclined plates, and the lower connecting rods pass through the step frame (the step frame can be directly welded to the front and rear inclined plates), and the front and rear sides of the step frame are respectively welded and fixed to the corresponding front and rear inclined plates by reinforcing rods. Furthermore, one end of the first pull rope is connected to the upper connecting rod, and the other end passes over a pulley and is connected to the positive and negative self-locking motor; one end of the second pull rope is connected to another upper connecting rod, and the other end is connected to the fall arrestor. In addition, auxiliary wheels are installed on the upper and lower ends of the outer side of the front inclined plate, and corresponding auxiliary wheels are also installed on the upper and lower ends of the outer side of the rear inclined plate, with the auxiliary wheels matching the sliding grooves of the inclined frame. In addition, corresponding lifting and lowering pedal switches are installed on the step frame.

[0035] It should be noted that the length and shape of each base plate unit in this solution may differ (as long as they can achieve the function of this solution).

[0036] In this design, a relay switch A (normally closed switch) is installed on the line connecting the lifting pedal switch and the control panel. Relay switch A is electrically connected to upper limit switch A, which is installed at the upper end of the inclined frame. When the step moves upward, it touches upper limit switch A just before reaching its upper limit. Upon receiving the signal, upper limit switch A transmits it to relay switch A, causing relay switch A to open, thus preventing the step from rising further (avoiding the situation where releasing the lifting pedal switch too late would cause the first pull rope to be continuously pulled upward by the motor, potentially damaging the motor). Similarly, a relay switch B is installed on the line connecting the lowering pedal switch and the control panel. Relay switch B is electrically connected to lower limit switch B, which is installed at the lower end of the inclined frame 30. Likewise, when the step moves downward, it touches upper limit switch B just before reaching its lower limit. Upon receiving the signal, lower limit switch B transmits it to relay switch B, causing relay switch B to open, thus preventing the step from descending further (avoiding the situation where releasing the lowering pedal switch too late would cause the first pull rope to be continuously released by the motor).

[0037] In this design, a handrail frame 46 is fixed on the step component 40. When a person stands on the step component, they can hold onto the handrail frame 46 to avoid losing their balance.

[0038] The above embodiments only illustrate preferred implementation methods, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A height-adjustable folding electric telescopic ladder for use in smoke rooms, characterized in that: Includes base frame (10), vertical frame (20), and diagonal frame (30); The base frame (10) is formed by splicing multiple base frame units (11) through a detachable plug-in method to form a structure with adjustable length; Each of the base frame units (11) can be equipped with a vertical frame (20) by a detachable insertion method, and the height of the vertical frame (20) on each base frame unit (11) is different; The inclined frame (30) is a telescopic long frame that is inclined and supported by vertical frames (20) of different heights. The highest vertical frame (20) is the height of the ladder. Based on the required ladder height, select the highest vertical frame (20), and adaptably stretch the diagonal frame (30) to the corresponding length, and also splice the corresponding length of the base frame (10) to form a splicing structure with adjustable ladder height; A step component (40) is provided on the inclined frame (30). The step component (40) can slide up and down along the inclined frame (30) through a power drive mechanism to form a step structure that does not require people to climb.

2. The height-adjustable folding electric telescopic ladder for smoke rooms according to claim 1, characterized in that: The inclined frame (30) has a sliding groove (31), and the step piece (40) is installed in conjunction with the sliding groove through auxiliary wheels; The step component (40) is connected to the first pull rope (41), and the first pull rope (41) passes around the pulley (42) and is connected to the forward and reverse self-locking motor (43); the forward and reverse self-locking motor (43) is fixed on the base frame (10), and the pulley (42) is fixed at the higher end when the inclined frame (30) is tilted.

3. The height-adjustable folding electric telescopic ladder for smoke rooms according to claim 2, characterized in that: When the inclined frame (30) is set at an incline, a fall arrestor (44) is fixedly installed at its higher end. The fall arrestor (44) is connected to the step component (40) via a second pull rope (45).

4. The height-adjustable folding electric telescopic ladder for smoke rooms according to any one of claims 1 to 3, characterized in that: The inclined frame (30) is welded from rectangular steel pipes. The inclined frame (30) is a rectangular frame formed by inserting two U-shaped frames. The two U-shaped frames are inserted to different depths, thus forming an adjustable telescopic structure for the length of the inclined frame. A round steel pipe section (32) is welded to the lower inclined surface of the inclined frame (30), and multiple support holes B are opened at the upper end of the vertical frame (20). Support pins are inserted into the round steel pipe section (32) and the support holes B to form a support and locking structure between the vertical frame and the inclined frame.

5. The height-adjustable folding electric telescopic ladder for smoke rooms according to claim 4, characterized in that: The lower end of the vertical frame (20) is a plug A, and the base frame (10) has a corresponding socket A. The plug A is inserted and fixed to the socket A.

6. The height-adjustable folding electric telescopic ladder for smoke rooms according to claim 1, characterized in that: In the aforementioned base frame (10): The base unit (11) is a horizontal rectangular frame with rollers (12) at its bottom. It has a socket B at one end and a plug B at the other end along its left and right length. Multiple base units (11) are inserted into each other through the socket B and the plug B.

7. The height-adjustable folding electric telescopic ladder for smoke rooms according to claim 1 or 2, characterized in that: The step component (40) is equipped with a lifting pedal switch and a lowering pedal switch. Both the lifting pedal switch and the lowering pedal switch are electrically connected to the power drive mechanism through the control panel.

8. The height-adjustable folding electric telescopic ladder for smoke rooms according to claim 7, characterized in that: The circuit connecting the lifting pedal switch and the control panel is equipped with a relay switch A, which is electrically connected to the upper limit switch A. The upper limit switch A is installed at the upper end of the inclined frame (30). The circuit connecting the lowering pedal switch and the control panel is equipped with a relay switch B. The relay switch B is electrically connected to the lower limit switch B, which is installed at the lower end of the inclined frame (30).

9. The height-adjustable folding electric telescopic ladder for smoke rooms according to claim 1, characterized in that: A handrail (46) is fixed on the step component (40).

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