Movable height-adjustable operation platform tool

Abstract

The movable height-adjustable operation platform tool comprises a base, a lifting platform and a hand-cranking hoist, a plurality of universal wheels are installed at the bottom of the base, two parallel sliding rails with sliding grooves are fixed to the upper portion of the base, each sliding rail and the ground are obliquely arranged at an acute angle, and a plurality of first stepping assemblies are fixed to the two sliding rails; two sections of parallel sliding blocks are fixed on the lifting platform, the two sections of sliding blocks are connected with the two sections of sliding rails in a sliding mode, a plurality of second stepping assemblies are fixed on the two sections of sliding blocks, the lifting platform is connected with the base through a gear and rack transmission mechanism, and the gear and rack transmission mechanism is driven by a hand-cranking hoist. The tool facilitates climbing operation of constructors, can improve construction safety of high-place operation, gives consideration to convenience of the constructors to get on and off a platform, is suitable for common lifting operation environments and construction operation on the outer side wall of a large pressure container, and especially suitable for occasions where protrusions are arranged below an operation interface and conventional tools cannot be close to the operation interface. And the method is more competent.

Description

Technical Field

[0001] The invention relates to an operating platform tool, in particular to a movable height-adjustable operating platform tool. Background Art

[0002] As the country attaches more and more importance to production safety, the safety facilities in construction sites are becoming more standardized and strict. For example, if the height is more than 2 meters, it is considered as high-altitude work, and the platform must have guardrails, and the construction workers must wear safety belts. In the manufacturing process of horizontal containers such as ultra-large diameter pipelines or large towers, construction workers often need to perform high-altitude operations when constructing the outer wall of the pressure vessel. At this time, they can only set up scaffolding or use professional aerial work vehicles to meet the construction conditions.

[0003] Although scaffolding can meet the construction requirements, it is time-consuming and inconvenient to move. Although professional aerial platforms are easy to move, conventional aerial platforms can only be lifted vertically, not diagonally, and it is difficult to meet the requirements of the upper and side areas of circular horizontal workpieces (such as Figure 1 As shown, Figure 1 In the figure, 10 is a circular horizontal workpiece, 101 is the upper side area, and 102 is a conventional scaffold or vertical lift vehicle). There is also a crane-like climbing vehicle that can basically meet the construction needs, but its biggest disadvantage is that it is relatively expensive and occupies a large area during use, which sometimes affects other surrounding construction operations. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an economical and practical mobile height-adjustable operating platform tooling, which is convenient for construction workers to work at heights, can improve the construction safety of high-altitude operations, and take into account the convenience of construction workers getting on and off the platform. It is not only suitable for ordinary lifting work environments, but also suitable for construction operations on the outer walls of large pressure vessels, especially in situations where there are protrusions below the operating interface that conventional tooling cannot approach.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a mobile height-adjustable operating platform tooling, including a base, a lifting platform and a hand-cranked hoist, a plurality of universal wheels are installed at the bottom of the base, two parallel slide rails with slide grooves are fixed on the upper part of the base, each slide rail is inclined at an acute angle to the ground, a plurality of groups of first step assemblies are fixed on the two slide rails, and the plurality of groups of first step assemblies are arranged at intervals along the length direction of the two slide rails, two parallel sliders are fixed on the lifting platform, the two sliders are slidably connected to the two slide rails, a plurality of groups of second step assemblies are fixed on the two sliders, and the plurality of groups of second step assemblies are arranged at intervals along the length direction of the two sliders, the lifting platform is connected to the base via a gear rack transmission mechanism, and the gear rack transmission mechanism is driven by the hand-cranked hoist.

[0006] The platform tooling of the present invention utilizes the lifting characteristics of the hand-cranked hoist, combined with the transmission function of the gear rack transmission mechanism, to guide the slider on the lifting platform to slide along the slide rail, thereby completing the oblique lifting action of the lifting platform and realizing the height adjustment function of the lifting platform. The slide rail and the slider also serve as an inclined ladder for the upper and lower platforms. The first step assembly fixed on the slide rail and the second step assembly fixed on the slider are both the tread surface of the step and the reinforcement part of the slide rail and the slider, which is beneficial to improve the reliability of the overall structure of the tooling. The platform tooling of the present invention is convenient for construction personnel to perform high-altitude operations, can improve the construction safety of high-altitude operations, and take into account the convenience of the construction personnel to go up and down the platform.

[0007] The platform tooling of the present invention is small in size in the retracted state and is easy to move. In actual use, the lifting operation is simple, fast and convenient. The inclined slide rail is cleverly used to cooperate with the extension and retraction of the inclined slider to realize the function of the inclined ladder, avoiding the use of the traditional straight ladder form that requires climbing up and down. The setting of the inclined ladder also makes it convenient for operators to go up and down the platform at any time. It is not only suitable for ordinary lifting operation environments, but also suitable for construction operations on the outer wall of large pressure vessels, especially in situations where there are protrusions below the operation interface and conventional tooling cannot approach. It is more competent.

[0008] The platform tooling of the present invention has a simple structure, is economical and practical, has a low manufacturing cost and good durability, is particularly suitable for use in situations where the working environment is complex and there is significant damage to the equipment, and has a much lower failure rate than traditional lifting tooling that uses electric or hydraulic power as the lifting power.

[0009] Preferably, the gear rack transmission mechanism comprises a transmission shaft, two transmission gears and two sections of racks, a section of the rack is fixed tightly to the back of each section of the slider, the transmission shaft is transversely fixed to the upper end of the two sections of the slide rails, a transmission gear is fixed to each of the two ends of the transmission shaft, each transmission gear is meshed with a section of the rack, a lifting sprocket is fixed to one end of the transmission shaft, the lifting chain of the hand-cranked hoist is connected end to end to form a ring after passing through the lifting sprocket, a support rod is connected between the two sections of the slide rails and the base, and the hand-cranked hoist is installed on the support rod. When the platform needs to be lifted, the operator stands on the ground to operate, and uses the hand-cranked hoist's crank handle to transmit power to the lifting sprocket through the lifting chain by using the hand-cranked hoist's labor-saving and self-locking characteristics, driving the transmission shaft and the transmission gear to rotate, and then driving the rack and the slider to move along the slide rail, thereby completing the oblique lifting and lowering action of the platform.

[0010] Furthermore, a self-locking mechanism is provided on the back of each section of the slide rail, and the self-locking mechanism is close to the upper end of the slide rail. The self-locking mechanism is used to prevent the lifting platform from sliding down due to its own weight in the event of a fault. The self-locking mechanism includes a lock tongue, a long handle and a spring. A support is fixed on the back of each section of the slide rail, the lower end of the lock tongue is hinged to the support, the lower end of the lock tongue is fixedly connected to the long handle, the upper end of the lock tongue is inclined toward the rack, and the upper end of the lock tongue is integrally provided with a plurality of teeth adapted to the rack. A notch is provided on the slide rail, and the notch is used to expose a portion of the rack meshed with the plurality of teeth. A pin is fixed on the support, and the spring is wound around the pin. One end of the spring is fixed to the slide rail, and the other end of the spring is fixed to the long handle. When the long handle is rotated until the plurality of teeth are meshed with the rack, the rack is locked; when the long handle is rotated until the plurality of teeth are disengaged from the rack, the lifting platform can be lifted and lowered smoothly. The hand-cranked hoist has good lifting safety characteristics, and with the above-mentioned self-locking mechanism, it can achieve dual protection functions. When the lifting system fails suddenly, the lifting platform will not slide down due to its own weight, which improves the safety and reliability of the tooling and ensures that the tooling is foolproof in terms of safety during use.

[0011] Preferably, two groups of retractable leg assemblies are arranged on one side of the base away from the two sections of the slide rails. The two groups of leg assemblies are arranged in a V shape. Each group of leg assemblies includes a crossbeam, a sleeve and a leg. The sleeve is fixed horizontally on the base. The crossbeam is retractably installed on the inner side of the sleeve. A screw is vertically installed on the outer side of the sleeve. The screw is used to vertically press the crossbeam. A screw sleeve is vertically fixed on the outer end of the crossbeam. The legs are threadedly connected with the screw sleeve. The retractable leg assembly can make the entire tooling structure more compact, more convenient to move, and more widely applicable. In the retracted state of the tooling, the crossbeam can be pushed into the sleeve, leaving only the legs outside; when it is necessary to lift the platform obliquely upward, the two crossbeams can be pulled out of the sleeve to expand the ground area of ​​the entire tooling, so that the vertical line of the outer edge of the lifting platform always falls within the range defined by the base and the legs, ensuring the stability of the platform and preventing the platform from tipping over. The extended length of the crossbeam can be adjusted and fixed accordingly according to the height of the platform and the limitations of the position during use, so as to improve the applicability of the tooling to special environments.

[0012] Preferably, the base is a square base welded from steel sections, the main body of the lifting platform is made of square steel pipes, the two sections of the slide rails are two sections of channel steel with opposite notches, the notches are the slide grooves, the two sections of the sliders are two sections of square steel pipes, the first step assembly and the second step assembly are respectively composed of a number of horizontally arranged square steel pipes, multiple groups of the first step assemblies are respectively welded to the two sections of the slide rails, and multiple groups of the second step assemblies are respectively welded to the two sections of the sliders. The main body of the tooling is made of the above-mentioned light material, which can reduce the load of the lifting system.

[0013] Preferably, a positioning pulley is installed at the lower end of each section of the sliding block, and each positioning pulley is arranged in a slide groove of a section of the sliding rail. The positioning pulley plays the role of limiting and reducing friction resistance.

[0014] Preferably, the two sections of the slide rails are equipped with a first guardrail, the two sections of the slide blocks are equipped with a second guardrail, the lifting platform is equipped with a third guardrail, and an arc guardrail is connected between the second guardrail and the third guardrail. After adopting the above design, all the guardrails of the tooling are enclosed as a whole, which can effectively ensure the safety of workers when operating on the platform.

[0015] Preferably, each section of the slide rail is inclined at an acute angle of 60 to 80 degrees to the ground.

[0016] Compared with the prior art, the present invention has the following advantages: the mobile height-adjustable operating platform tooling of the present invention utilizes the lifting characteristics of the hand-cranked hoist, combined with the transmission function of the gear rack transmission mechanism, to guide the slider on the lifting platform to slide along the slide rail, thereby completing the oblique lifting action of the lifting platform and realizing the height adjustment function of the lifting platform. The platform tooling of the present invention is convenient for construction personnel to climb up and work, can improve the construction safety of high-altitude operations, and takes into account the convenience of the construction personnel's up and down platform functions. It is not only suitable for ordinary lifting work environments, but also suitable for construction operations on the outer wall of large pressure vessels, especially in situations where there are protrusions below the operating interface and conventional tooling cannot approach, it is more competent. The platform tooling of the present invention has a simple structure, is economical and practical, not only has a low manufacturing cost, but also has good durability. It is particularly suitable for use in situations where the working environment is complex and the damage to the equipment is large, and the failure rate is much lower than that of traditional lifting tooling that uses electric or hydraulic power as the lifting power. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the use status of a conventional scaffold or vertical lift vehicle;

[0018] Figure 2 It is a partial cross-sectional side view schematic diagram of the movable height-adjustable operating platform tooling after it is fully raised in the embodiment;

[0019] Figure 3 It is a schematic diagram of the front view of the movable height-adjustable operating platform tooling after it is fully raised in the embodiment;

[0020] Figure 4 It is a partial cross-sectional side view schematic diagram of the movable height-adjustable operating platform tooling in the embodiment when it is fully retracted;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6 This is a schematic diagram of the installation effect of the hand-cranked hoist in the embodiment;

[0023] Figure 7 is a schematic top view of the leg assembly in the embodiment in a retracted state;

[0024] Figure 8 It is a top view schematic diagram of the leg assembly in the embodiment in the extended state;

[0025] Fig. 9 Schematic diagram of the use state of the movable height-adjustable operating platform tooling in the embodiment;

[0026] Figures 1 to 9 The specific reference numerals are as follows:

[0027] 1-base, 11-universal wheel, 2-lifting platform, 21-third guardrail, 22-arc guardrail, 3-hand hoist, 31-lifting chain, 4-slide rail, 41-first step assembly, 42-notch, 43-first guardrail, 5-slider, 51-second step assembly, 52-positioning pulley, 53-support, 54-notch, 55-pin, 56-second guardrail, 61-drive shaft, 62-drive gear, 63-rack, 64-lifting sprocket, 7-support rod, 81-lock tongue, 82-long handle, 83-spring, 84-teeth, 9-leg assembly, 91-crossbeam, 92-sleeve, 93-leg, 94-screw, 95-screw sleeve, 10-annular horizontal workpiece, 101-side upper area, 102-conventional scaffolding or vertical lifting vehicle. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings.

[0029] The movable height-adjustable operating platform tooling of the embodiment, such as Figure 2 to Figure 9 As shown, it includes a base 1, a lifting platform 2 and a hand-cranked hoist 3. Four universal wheels 11 are installed at the bottom of the base 1. Two parallel slide rails 4 with slide grooves are fixed on the upper part of the base 1. Each slide rail 4 is inclined at an acute angle of 70° to the ground. Multiple groups of first step assemblies 41 are fixed on the two slide rails 4. The multiple groups of first step assemblies 41 are evenly arranged at intervals of 20 cm along the length direction of the two slide rails 4. Two parallel sliders 5 are fixed on the lifting platform 2. The two sliders 5 are slidably connected to the two slide rails 4. A positioning pulley 52 is installed at the lower end of each slider 5. Each positioning pulley 52 is arranged in the slide groove of one slide rail 4. Multiple groups of second step assemblies 51 are fixed on the two sliders 5. The multiple groups of second step assemblies 51 are evenly arranged at intervals of 20 cm along the length direction of the two sliders 5. The lifting platform 2 is connected to the base 1 via a gear rack transmission mechanism, and the gear rack transmission mechanism is driven by the hand-cranked hoist 3.

[0030] In this embodiment, the gear rack transmission mechanism includes a transmission shaft 61, two transmission gears 62 and two racks 63. A rack 63 is tightly fixed to the back of each slider 5. The transmission shaft 61 is laterally bridged and fixed to the upper ends of the two slide rails 4. A transmission gear 62 is fixed at both ends of the transmission shaft 61. Each transmission gear 62 is meshed with a rack 63. A lifting sprocket 64 is fixed to one end of the transmission shaft 61. The lifting chain 31 of the hand hoist 3 is connected end to end to form a ring after passing around the lifting sprocket 64. A support rod 7 is connected between the two slide rails 4 and the base 1, and the hand hoist 3 is installed on the support rod 7.

[0031] In this embodiment, a self-locking mechanism is provided on the back of each section of the slide rail 4, and the self-locking mechanism is close to the upper end of the slide rail 4. The self-locking mechanism is used to prevent the lifting platform 2 from sliding down due to its own weight in the event of a fault. The self-locking mechanism includes a lock tongue 81, a long handle 82 and a spring 83. A support 53 is fixed to the back of each section of the slide rail 4. The lower end of the lock tongue 81 is hinged to the support 53, and the lower end of the lock tongue 81 is fixedly connected to the long handle 82. The upper end of the lock tongue 81 is inclined to the rack 63, and the upper end of the lock tongue 81 is integrally provided with a There are three teeth 84, and a notch 54 is opened on the slide rail 4. The notch 54 is used to expose a portion of the rack 63 that meshes with the three teeth 84. A pin 55 is fixed to the support 53, and a spring 83 is wound around the pin 55. One end of the spring 83 is fixed to the slide rail 4, and the other end of the spring 83 is fixed to the long handle 82. When the long handle 82 is rotated until the three teeth 84 are engaged with the rack 63, the rack 63 is locked; when the long handle 82 is rotated until several teeth 84 are disengaged from the rack 63, the lifting platform can be lifted and lowered smoothly.

[0032] In this embodiment, two groups of retractable leg assemblies 9 are provided on the side of the base 1 away from the two sections of slide rails 4. The two groups of leg assemblies 9 are arranged in a V shape. Each group of leg assemblies 9 includes a crossbeam 91, a sleeve 92 and a leg 93. The sleeve 92 is horizontally fixed on the base 1, and the crossbeam 91 is telescopically installed on the inner side of the sleeve 92. A screw 94 is vertically installed on the outer side of the sleeve 92. The screw 94 is used to vertically press the crossbeam 91. A screw sleeve 95 is vertically fixed on the outer end of the crossbeam 91, and the leg 93 is threadedly connected to the screw sleeve 95.

[0033] In this embodiment, the base 1 is a square base 1 welded by steel sections, the main body of the lifting platform 2 is made of square steel pipes, the two sections of the slide rails 4 are 14# channel steels with two sections of notches 42 facing each other, the notches 42 are slide grooves, the two sections of the sliders 5 are two sections of square steel pipes, the first step assembly 41 is composed of three horizontally arranged square steel pipes, the second step assembly 51 is composed of two horizontally arranged square steel pipes, multiple groups of first step assemblies 41 are respectively welded to the two sections of the slide rails 4, and multiple groups of second step assemblies 51 are respectively welded to the two sections of the sliders 5. The main body of the tooling is made of the above-mentioned light materials, and the overall weight does not exceed 150kg. Together with the total weight of the operator and equipment, it can be controlled within 500kg, so the selection of a 2-3 ton hand-cranked hoist 3 can fully meet the design requirements.

[0034] In this embodiment, a first guardrail 43 is installed on the two sections of the slide rail 4, a second guardrail 56 is installed on the two sections of the slide block 5, a third guardrail 21 is installed on the lifting platform 2, and an arc guardrail 22 is connected between the second guardrail 56 and the third guardrail 21.

[0035] The platform tooling utilizes the lifting characteristics of the hand-cranked hoist 3 and the transmission function of the gear rack transmission mechanism to guide the slider 5 on the lifting platform 2 to slide along the slide rail 4, thereby completing the oblique lifting action of the lifting platform 2 and realizing the height adjustment function of the lifting platform 2. The slide rail 4 and the slider 5 also serve as an inclined ladder for the upper and lower platforms 2. The first step assembly 41 fixed on the slide rail 4 and the second step assembly 51 fixed on the slider 5 are not only the tread surface of the step, but also serve as the reinforcement part of the slide rail 4 and the slider 5, which is conducive to improving the reliability of the overall structure of the tooling. The setting of the inclined ladder also makes it convenient for the operator to go up and down the platform 2 at any time. It is not only suitable for ordinary lifting operation environments, but also suitable for construction operations on the outer wall of large pressure vessels, especially in situations where there are protrusions below the operating interface and conventional tooling cannot approach, it is more competent, such as construction operations in the upper side area of ​​annular horizontal workpieces.

Claims

1. A mobile height-adjustable operating platform tooling, characterized in that: It includes a base, a lifting platform and a hand-cranked hoist. A plurality of universal wheels are installed at the bottom of the base. Two parallel slide rails with slide grooves are fixed on the upper part of the base. Each slide rail is inclined at an acute angle to the ground. A plurality of groups of first step assemblies are fixed on the two slide rails. The plurality of groups of first step assemblies are arranged at intervals along the length direction of the two slide rails. Two parallel sliders are fixed on the lifting platform. The two sliders are slidably connected to the two slide rails. A plurality of groups of second step assemblies are fixed on the two sliders. The plurality of groups of second step assemblies are arranged at intervals along the length direction of the two sliders. The lifting platform is connected to the base via a rack and pinion transmission mechanism. The rack and pinion transmission mechanism is driven by the hand-cranked hoist.

2. The movable height-adjustable operating platform tooling according to claim 1, characterized in that: The rack and pinion transmission mechanism includes a transmission shaft, two transmission gears and two sections of racks. A section of the rack is tightly fixed to the back of each section of the sliding block. The transmission shaft is transversely bridged and fixed to the upper ends of the two sections of the sliding rails. A transmission gear is fixed to each of the two ends of the transmission shaft. Each transmission gear is meshed with a section of the rack. A lifting sprocket is fixed to one end of the transmission shaft. The lifting chain of the hand-cranked hoist is connected end to end to form a ring after passing around the lifting sprocket. A support rod is connected between the two sections of the sliding rails and the base, and the hand-cranked hoist is installed on the support rod.

3. The movable height-adjustable operating platform tooling according to claim 2, characterized in that: A self-locking mechanism is provided on the back of each section of the slide rail, and the self-locking mechanism is close to the upper end of the slide rail. The self-locking mechanism is used to prevent the lifting platform from sliding down due to its own weight in the event of a fault. The self-locking mechanism includes a lock tongue, a long handle and a spring. A support is fixed on the back of each section of the slide rail, the lower end of the lock tongue is hinged to the support, the lower end of the lock tongue is fixedly connected to the long handle, the upper end of the lock tongue is inclined toward the rack, and the upper end of the lock tongue is integrally provided with a plurality of teeth adapted to the rack. A notch is provided on the slide rail, and the notch is used to expose a portion of the rack meshed with the plurality of teeth. A pin is fixed on the support, and the spring is wound around the pin. One end of the spring is fixed to the slide rail, and the other end of the spring is fixed to the long handle. When the long handle is rotated until the plurality of teeth are meshed with the rack, the rack is locked; when the long handle is rotated until the plurality of teeth are disengaged from the rack, the lifting platform can be lifted and lowered smoothly.

4. The movable height-adjustable operating platform tooling according to claim 1, characterized in that: Two groups of retractable leg assemblies are arranged on one side of the base away from the two sections of the slide rails. The two groups of leg assemblies are arranged in a V shape. Each group of leg assemblies includes a crossbeam, a sleeve and a leg. The sleeve is horizontally fixed on the base. The crossbeam is telescopically installed on the inner side of the sleeve. A screw rod is vertically installed on the outer side of the sleeve. The screw rod is used to vertically press the crossbeam. A screw sleeve is vertically fixed on the outer end of the crossbeam. The leg is threadedly connected to the screw sleeve.

5. The movable height-adjustable operating platform tooling according to claim 1, characterized in that: The base is a square base welded from steel sections, the main body of the lifting platform is made of square steel pipes, the two sections of the slide rails are two sections of channel steel with opposite notches, the notches are the slide grooves, the two sections of the sliders are two sections of square steel pipes, the first step assembly and the second step assembly are respectively composed of a number of horizontally arranged square steel pipes, multiple groups of the first step assemblies are respectively welded to the two sections of the slide rails, and multiple groups of the second step assemblies are respectively welded to the two sections of the sliders.

6. The movable height-adjustable operating platform tooling according to claim 1, characterized in that: A positioning pulley is installed at the lower end of each section of the sliding block, and each positioning pulley is arranged in a sliding groove of a section of the sliding rail.

7. The movable height-adjustable operating platform tooling according to claim 1, characterized in that: A first guardrail is installed on the two sections of the slide rails, a second guardrail is installed on the two sections of the slide blocks, a third guardrail is installed on the lifting platform, and an arc guardrail is connected between the second guardrail and the third guardrail.

8. The movable height-adjustable operating platform tooling according to claim 1, characterized in that: Each section of the slide rail is inclined at an acute angle of 60 to 80 degrees to the ground.

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