CN107178304B - A multifunctional safety ladder - Google Patents

Abstract

The invention relates to a multifunctional safety ladder, which comprises a ladder, a bottom plate, a horizontal plate, an electric lifting rod, ladder wheels, a support rod and a main rod slide block. Ladder upper end be equipped with the horizontal plate, the lower extreme is equipped with the bottom plate, the bottom plate lower extreme is equipped with the ladder wheel, the bottom plate upper end is equipped with electric lift pole, electric lift pole be located the right side of ladder, be connected with the mobile jib slider between ladder and the bottom plate, be equipped with the bracing piece between horizontal plate and the ladder. The horizontal plate can always keep parallel to the ground as the angle between the horizontal plate and the ladder is changed along with the ascending and descending of the ladder, the rocker arm is arranged in the horizontal plate, when the ladder needs to lean against a telegraph pole, the rocker arm can automatically pop up to lock the horizontal plate on the telegraph pole, the ladder is prevented from shaking in the use process, and the operation safety of workers is improved.

Description

A multifunctional safety ladder

technical field

The invention belongs to the technical field of electrician auxiliary equipment, and in particular relates to a multifunctional safety ladder.

Background technique

Ladders are the most frequently used auxiliary tools for electric workers. There are many kinds of ladders on the market. The materials are aluminum alloy, stainless steel, fiberglass, iron, bamboo, wood, etc. They are divided into two types from the structure: straight ladders , telescopic ladder, single-sided ladder, double-sided ladder, multi-functional ladder, etc. Restricted by the working environment of electric workers, straight ladders are often used in electric power operations. The ladders used should be firm and complete. The rungs of the ladder should be embedded in the pillars, the distance between the steps should not be greater than 40 cm, and a height limit mark should be set at 1 meter from the top of the ladder. When working with a single ladder, the oblique angle between the ladder and the ground is about 60 degrees, and it is not suitable for binding. When using it horizontally on a pole tower, a special special ladder should be used. Before work, both ends of the ladder should be reliably connected to the fixed object, and generally one person should work on the ladder. When using the ladder on smooth and hard ground, rubber sleeves or rubber pads should be added to the feet of the ladder. When using the ladder on muddy ground, iron points should be added to the feet of the ladder.

On March 23, 2014, China Patent Publication issued a patent for a special ladder for meter box installation with application number 201420130834.X. This patent includes two longitudinal bars and a cross bar at the top. A connecting groove is provided on the rear side of the cross bar at the top. A plate body is hinged through a shaft in the connecting groove. The rear side of the longitudinal rod is provided with an open groove body, the edges of both sides of the groove body are provided with positioning bayonets, the bottom of the groove body is provided with a chute, and the middle of the bottom end of the chute is provided with longitudinal positioning teeth; the connecting rod is movably connected with a clamping device , the clamping device can slide along the connecting rod, the end of the connecting rod is provided with a pulley adapted to the chute, and the center of the pulley is provided with a positioning groove adapted to the positioning teeth. In this patent, the angle between the board body and the vertical rod needs to be adjusted before the ladder is erected, and the angle adjustment range is limited, so that the board body cannot be parallel to the ground. When the ladder needs to be leaned on the utility pole for construction, The ladder cannot be effectively fixed, which brings great potential safety hazards to the user.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a multifunctional safety ladder. The angle between the horizontal plate of the present invention and the ladder can be kept parallel to the ground as the ladder moves up and down. There is a rocker arm inside. When the ladder needs to lean on the utility pole, the rocker arm will automatically pop up and lock the horizontal plate on the utility pole to prevent the ladder from shaking during use and improve the safety of workers.

The technical solution adopted by the invention to solve its existing problems is:

A multifunctional safety ladder, including a ladder. The lower end of the ladder is provided with a bottom plate, the upper end of the ladder is hinged with a horizontal plate, the lower end of the bottom plate is provided with ladder wheels, and the electric lifting rod is arranged on the bottom plate, and the electric lifting rod is located on the right side of the ladder . The ladder includes a main rod and a cross rod. A hand wheel slideway is provided on the outer side above the main rod, and a worm is provided above the inner axial center line of the main rod. The right side of the position below the line is provided with a support rod slideway, and the left side is provided with a lifting rod slideway II. The left side of the bottom plate is provided with a power supply device, the right side of the power supply device is provided with a control device, the right side of the control device is provided with a double output shaft motor I, and the two ends of the double output shaft motor I are provided with There is a bevel gear Ⅰ, the right side of the double output shaft motor Ⅰ is provided with a double output shaft motor Ⅱ, the two ends of the double output shaft motor Ⅱ are provided with a bevel gear Ⅱ, and the two sides of the power supply device are provided with The ladder moving screw, the right end of the ladder moving screw is provided with a screw bevel gear II, the screw bevel gear II is meshed with the bevel gear I, and the right side of the ladder moving screw is provided with a lifting rod moving screw, The right end of the moving screw of the lifting rod is provided with a screw bevel gear I, and the screw bevel gear I is meshed with the bevel gear II, and the inside four corners of the bottom plate are provided with ladder wheel lifting blocks, and the ladder wheel There are threaded holes inside the lifting block, the upper surface of the base plate is provided with a main rod slideway corresponding to the position of the ladder moving screw, and the upper surface of the base plate is provided with a lifting rod slideway I at a position corresponding to the moving screw of the lifting rod. There are control buttons on the side of the bottom plate. The upper end of the electric lifting rod is hinged with a lifting rod slider, and the lifting rod slider is located inside the lifting rod slideway II, and the lower end of the electric lifting rod is provided with a lifting rod moving block, and the lifting rod moving block Located inside the slideway I of the lifting rod, the center of the moving block of the lifting rod is provided with a threaded hole, the threaded hole in the center of the moving block of the lifting rod is threadedly connected with the moving screw of the lifting rod, and the lower part of the moving block of the lifting rod is located on the bottom plate A slip ring is arranged on the bottom surface of the slip ring, and a carbon brush is slid inside the slip ring. The carbon brush is fixedly connected with the electric lifting rod, and the electric lifting rod is electrically connected with the power supply device through the carbon brush and the slip ring. A main rod slider is arranged between the ladder and the bottom plate, the upper end of the main rod slider is hinged with the main rod, the lower end of the main rod slider is arranged inside the main rod slideway, and the main rod slider A fixed turbine shaft is arranged in the middle of the block, and the turbine shaft is meshed with the worm gear. The horizontal plate includes a shell, an intermediate layer is provided in the middle of the shell, an arc-shaped slot is provided at the front end of the shell, a spring seat is provided at the back of the shell above the middle layer, and a spring seat is provided at the back of the shell. There is a fixed co-positioning gear on both sides, the co-positioning gear is meshed with the worm gear, a rocker slideway is provided on both sides of the front end of the housing, and the arc-shaped slot is provided with Pole fastening switch, racks are provided on both sides of the rear end of the pole fastening switch, a spring slot is provided between the two racks, and a spring is provided between the spring slot and the spring seat, The right side of the rack is provided with a rocker limit device, and the rocker limit device includes a gear on the left side and a limit tooth on the right side, and the gear is meshed with the rack. A rocker arm is provided inside the rocker arm slideway, a torsion spring I is provided between the rocker arm and the shell, and a connecting shaft is provided in the center of the torsion spring I, and the connecting shaft passes through the middle layer, so The rocker arm return gear is fixed on the connecting shaft below the middle layer, the connecting shaft is fixedly connected with the rocking arm, the side of the rocking arm is provided with a pawl slideway, and the inside of the pawl slideway is There is a ratchet, the front end of the ratchet is stuck inside the limit tooth, a torsion spring II is arranged between the ratchet and the rocker arm, and a travel switch is arranged at the rear end of the rocker arm. The inside of the shell is located at the center below the middle layer, and a dual-output shaft motor III is provided. Output worms are provided at both ends of the dual-output shaft motor III. When the dual-output shaft motor III is not energized, the output worm The bottom can be rotated freely. The front end of the output worm is meshed with an intermediate gear, and the intermediate gear is meshed with the return gear of the rocker arm. Support rods are hinged on both sides below the horizontal plate, a support rod slider is provided between the support rod and the main rod, one end of the support rod slider is hinged with the support rod, and the support rod slider The other end is arranged inside the slideway of the support rod, and the inside of the slideway of the handwheel is provided with a locking handwheel, and the locking handwheel is threadedly connected with the slide block of the support rod. The dual-output-shaft motor I, dual-output-shaft motor II, dual-output-shaft motor III, travel switch, electric lifting rod, and power supply device are respectively electrically connected to the control device, and realize respective actions through control buttons.

Preferably, the ladder wheel includes a wheel body and a wheel, a rotating shaft is arranged in the middle of the wheel, the wheel is arranged inside the wheel body, and a rotating shaft slide is arranged inside the wheel body above the rotating shaft. Slot, above the inside of the wheel body is provided with a shock absorber chute, between the rotating shaft chute and the shock absorber chute is provided with a shock absorber, and the lower end of the shock absorber is provided with a lower end block, The lower end block is arranged inside the chute of the rotating shaft, the upper end of the shock absorbing rod is provided with an upper end block, the upper end block is located inside the chute of the shock absorbing rod, and the inside of the chute of the shock absorbing rod is located in the upper end block A thrust spring is provided above the wheel body, a connecting rod is provided at the upper end of the wheel body, and a threaded part is provided on the connecting rod, and the threaded part is tightly connected with the threaded hole inside the ladder wheel lifting block.

Preferably, an arc-shaped non-slip rubber is fixed inside the end of the rocker arm.

Preferably, the travel switch can be a direct-acting travel switch or a roller travel switch.

Preferably, the length of the horizontal plate is greater than the thickness of the meter box.

A method for using a multifunctional safety ladder according to claim 1, comprising the following steps:

Step 1, fix the bottom plate:

Drag the multifunctional safety ladder to the construction site, find a good placement area, rotate the ladder wheel, and move up and down through the threaded part of the upper part of the connecting rod in the threaded hole in the ladder wheel lifting block to realize the adjustment of the up and down position of the ladder wheel. Adjust the four The up and down positions of the ladder wheels ensure that the bottom plate and the ground are in a horizontal position.

Step 2, raise the ladder to the designated maintenance position:

Press the control button, drive the double output shaft motor Ⅰ and the double output shaft motor Ⅱ to rotate through the control device, and drive the ladder moving screw and the lifting rod moving screw to rotate, so that the ladder and the electric lifting rod move forward and backward on the bottom plate, and at the same time, it is controlled by the control device The electric mast is raised upwards until the front end of the horizontal plate leans against the wall below the meter box access area. When the electric lifting rod rises upwards, the ladder will rotate along the upper end of the main rod slider. At this time, the turbine shaft fixed on the main rod slider will make the worm inside the ladder rotate, and the worm will mesh with the co-position gear fixed on the horizontal plate. Connected, so the rotation of the worm drives the horizontal plate to rotate around the axis where the horizontal plate is hinged with the ladder, so that the horizontal plate is always parallel to the bottom plate. The rotation of the horizontal plate pushes the support bar slider at the lower end of the support bar to slide in the handwheel slideway. When the operator climbs to the upper end of the ladder, he tightens and locks the hand wheel to prevent the support bar slider from moving during the operation. When the object on the front end of the horizontal plate is not a wall but a utility pole, put the utility pole close to the arc-shaped slot at the front end of the horizontal plate. At this time, the utility pole pushes the pole fastening switch to move backward, and the pole fastening switch The rack on the top drives the rocker arm limit device to rotate, unlocks the locking of the ratchet on the rocker arm, and the rocker arm pops out under the turning force of the torsion spring I and hugs the utility pole tightly. When the worker boards the ladder, the pressure on the wheel is greater than the thrust of the thrust spring, and the wheel body falls to touch the ground, which further improves the stability of the ladder. After reaching the top of the ladder, the worker can put the work tool on the horizontal plate.

Step three, recover the ladder:

After the operation is completed, loosen the locking handwheel and step down the ladder, the pressure on the wheels decreases, which is less than the thrust of the thrust spring, and the wheel body rises and breaks away from the ground. Press the control button to drive the double output shaft motor Ⅲ through the control device, the output worm of the double output shaft motor Ⅲ drives the rocker arm return gear to rotate through the intermediate gear, so that the rocker arm overcomes the turning force of the torsion spring Ⅰ and separates from the utility pole to the inside of the horizontal plate Recycling, when the pawl running to its upper part is stuck inside the upper limit tooth of the rocker arm limit device, the travel switch will act, and the power supply to the double output shaft motor III will be cut off through the control device, and the double output shaft motor III will stop working. Press the control button to drive the dual output shaft motor Ⅰ, dual output shaft motor Ⅱ and the electric lifting rod through the control device, shrink the electric lifting rod and move it to the rightmost end of the lifting rod slideway Ⅰ, and move the main rod slider to The leftmost end of the slideway of the main rod reduces the height of the ladder so that the ladder moves closer to the bottom plate, which facilitates the movement of the multi-purpose safety ladder.

Compared with prior art, the beneficial effect that the present invention has:

(1) In the present invention, as the angle between the ladder and the bottom plate changes, the angle between the horizontal plate and the ladder is automatically changed, so that the horizontal plate is always kept parallel to the ground, ensuring the front end of the horizontal plate and the wall. The degree of fit reduces the difficulty of the operation of the ladder and improves the safety of use.

(2) The ladder wheels of the present invention can be rotated by 90° to realize the transformation from the wheels to the pads. At the same time, the height of each ladder wheel can be adjusted, which facilitates the consignment of the ladder and ensures that the bottom plate is placed horizontally when the ladder is in use. , to give strong support to the ladder to ensure the safety of workers.

(3) The length of the horizontal plate of the present invention is greater than the thickness of the existing electric meter box, which widens the scope of use.

(4) When the present invention needs to work on pole-shaped objects such as utility poles, the utility pole can be placed close to the inside of the arc-shaped slot of the horizontal plate, and the rocker in the horizontal plate will automatically pop up to lock the horizontal plate on the On the utility pole, prevent the ladder from shaking during the worker's operation.

(5) The ladder wheel of the present invention is equipped with a damping rod and a thrust spring inside, which can provide a damping function during the movement of the ladder, and avoid damage to electrical components such as the control device caused by vibration.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a side view of a multifunctional safety ladder of the present invention,

Fig. 2 is the front view of the present invention,

Fig. 3 is a top view of the present invention,

Fig. 4 is a structural diagram of the upper layer of the horizontal plate of the present invention,

Fig. 5 is a structural diagram of the lower layer of the horizontal plate of the present invention,

Fig. 6 is a diagram of the internal structure of the bottom plate of the present invention,

Fig. 7 is the internal structural diagram of the main pole of the ladder of the present invention,

Fig. 8 is an outline drawing of the ladder wheel of the present invention,

Fig. 9 is a sectional view of the ladder wheel of the present invention,

Figure 10 is a sectional view of the A-A plane of the present invention,

Fig. 11 is the sectional view of B-B plane of the present invention,

Fig. 12 is a sectional view of C-C plane of the present invention,

Fig. 13 is a D-D plane sectional view of the present invention,

Fig. 14 is the sectional view of E-E plane of the present invention,

Figure 15 is a sectional view of the F-F plane of the present invention,

Fig. 16 is a schematic diagram of the control system of the present invention.

In the figure: 1-base plate, 1a-power supply device, 1b-control device, 1c-double output shaft motor Ⅰ, 1c1-bevel gear Ⅰ, 1d-double output shaft motor Ⅱ, 1d1-bevel gear Ⅱ, 1e-lift Rod moving screw, 1e1-screw bevel gear Ⅰ, 1f-ladder moving screw, 1f1-screw bevel gear Ⅱ, 1g-control button, 1h-ladder wheel lifting block, 1h1-threaded hole, 1i-main rod slide, 1j-lift rod slideway Ⅰ;

2-ladder, 2a-main rod, 2a1-hand wheel slideway, 2b-horizontal bar, 2c-worm, 2d-support rod slideway, 2e-lifting rod slideway Ⅱ;

3-horizontal plate, 3a-shell, 3a1-spring seat, 3a2-alignment gear, 3a3-rocker slideway, 3a4-arc slot, 3b-intermediate layer, 3c-pole fastening switch, 3c1-rack , 3c2-spring groove, 3d-rocker arm, 3d1-pawl, 3d11-torsion spring Ⅱ, 3d2-torsion spring Ⅰ, 3d3-connecting shaft, 3d4-rocker arm return gear, 3d5-pawl slide, 3e- Spring, 3f-rocker arm limit device, 3f1-gear, 3f2-limit tooth, 3g-travel switch, 3h-double output shaft motor III, 3h1-output worm, 3i-intermediate gear;

4- Electric lifting rod, 4a- Lifting rod slider, 4b- Slip ring, 4c- Lifting rod moving block, 4d- Carbon brush;

5-ladder wheel, 5a-wheel body, 5a1-rotating shaft chute, 5a2-damping rod chute, 5a3-connecting rod, 5b-wheel, 5b1-rotating shaft, 5c-damping rod, 5c1-lower end block, 5c2-upper block, 5d-thrust spring;

6-support rod, 6a-support rod slider, 6b-locking handwheel;

7-main rod slider, 7a-turbine shaft;

Detailed ways

The attached drawing is the best embodiment of the multi-functional safety ladder, and the present invention will be further described in detail below in conjunction with the accompanying drawings.

A multifunctional safety ladder includes a ladder 2. The lower end of the ladder 2 is provided with a bottom plate 1, and the upper end of the ladder is hinged with a horizontal plate 3. The length of the horizontal plate 3 is greater than the thickness of the meter box, so that the horizontal plate 3 can lean on the wall behind the meter box , and put other tools on the platform where the horizontal plate 3 grows out. The lower end of the base plate 1 is provided with a ladder wheel 5, and the above base plate 1 is provided with an electric elevating rod 4, and the electric elevating rod 4 is located on the right side of the ladder 2.

The ladder 2 includes a main rod 2a and a cross bar 2b made of an aluminum alloy square tube. A handwheel slideway 2a1 is provided on the upper side of the main rod 2a, and a position above the axial center line inside the main rod 2a is set There is a worm 2c, the right side of the main rod 2a below the axial center line is provided with a support rod slideway 2d, and the left side is provided with a lifting rod slideway II2e.

The internal left side of the bottom plate 1 is provided with a power supply device 1a. The power supply device 1a includes a storage battery, a transformer and a power socket. When there is no power supply outdoors, the storage battery can be used for power supply, and when there is a power supply, the external power supply can be directly used for power supply. The right side of the power supply device 1a is provided with a control device 1b, the right side of the control device 1b is provided with a double output shaft motor I1c, and the two ends of the double output shaft motor I1c are provided with bevel gears I1c1, and the described The right side of the double output shaft motor I1c is provided with a double output shaft motor II1d, and the two ends of the double output shaft motor II1d are provided with a bevel gear II1d1. The two sides of the power supply unit 1a are provided with a ladder moving screw 1f, and the right end of the ladder moving screw 1f is provided with a screw bevel gear II1f1, and the screw bevel gear II1f1 is meshed with the bevel gear I1c1. The right side of the ladder moving screw 1f is provided with a lifting rod moving screw 1e, and the right end of the lifting rod moving screw 1e is provided with a screw bevel gear I1e1, and the screw bevel gear I1e1 is engaged with the bevel gear II1d1. The inner four corners of the bottom plate 1 are provided with ladder wheel lifting blocks 1h, and the interior of the ladder wheel lifting block 1h is provided with threaded holes 1h1, and the upper surface of the bottom plate 1 is provided with a main rod slideway corresponding to the position of the ladder moving screw rod 1f. 1i, the upper surface of the bottom plate 1 is provided with a lift rod slideway I1j corresponding to the position of the lift rod moving screw 1e, and the side of the bottom plate 1 is provided with a control button 1g.

The ladder wheel 5 includes a wheel body 5a and a wheel 5b. A rotating shaft 5b1 is arranged in the middle of the wheel 5b. The wheel 5b is arranged inside the wheel body 5a. A rotating shaft chute 5a1 is provided above, and a shock absorbing rod chute 5a2 is provided above the inside of the wheel body 5a, and a shock absorbing rod 5c is provided between the rotating shaft chute 5a1 and the shock absorbing rod chute 5a2. The lower end of the damping rod 5c is provided with a lower end block 5c1, the lower end block 5c1 is arranged inside the rotating shaft chute 5a1, and the upper end of the shock absorbing rod 5c is provided with an upper end block 5c2, and the upper end block 5c2 is located at Inside the damping rod sliding groove 5a2, a thrust spring 5d is arranged above the upper end block 5c2 inside the damping rod sliding groove 5a2. The shock-absorbing rod 5c and the thrust spring 5d can provide a shock-absorbing effect during the moving process of the ladder, so as to prevent the vibration from causing damage to the control device and other electrical components. The upper end of the wheel body 5a is provided with a connecting rod 5a3, and the connecting rod 5a3 is provided with a threaded portion 5a31, and the threaded portion 5a31 is tightly connected with the threaded hole 1h1 inside the ladder wheel lifting block 1h.

The electric lifting rod 4 is also called a push rod motor, an electric cylinder and a linear actuator. The electric lifting rod is an electric drive device that converts the rotational motion of the motor into the linear reciprocating motion of the lifting rod. It can be used as an execution machine in various simple or complex technological processes to realize remote control, centralized control or automatic control. Electric lifting rods can be designed with different thrusts according to different application loads. Generally, the maximum thrust can reach 6000N, and the no-load running speed is 4mm~35mm/s. The electric push rod is powered by a 24V/12V DC permanent magnet motor. The power source converts the rotational motion of the motor into linear reciprocating motion. The upper end of the electric lifting rod 4 is hinged with a lifting rod slider 4a, and the lifting rod slider 4a is located inside the lifting rod slideway II 2e, and the lower end of the electric lifting rod 4 is provided with a lifting rod moving block 4c. The rod moving block 4c is located inside the lifting rod slideway I1j, the center of the lifting rod moving block 4c is provided with a threaded hole, and the threaded hole in the center of the lifting rod moving block 4c is threadedly connected with the lifting rod moving screw rod 1e, and the A slip ring 4b is arranged on the bottom surface of the bottom plate 1 below the lifting rod moving block 4c, and a carbon brush 4d is slid inside the slip ring 4b. The carbon brush 4d is fixedly connected with the electric lifting rod 4, and the electric lifting rod 4 is electrically connected with the power supply device 1a through the carbon brush 4d and the slip ring 4b.

A main rod slider 7 is arranged between the ladder 2 and the bottom plate 1, the upper end of the main rod slider 7 is hinged with the main rod 2a, and the lower end of the main rod slider 7 is arranged inside the main rod slideway 1i , The middle of the main rod slider 7 is provided with a fixed turbine shaft 7a, and the turbine shaft 7a is gear meshed with the worm 2c.

The horizontal plate 3 includes a shell 3a, an intermediate layer 3b is provided in the middle of the shell 3a, an arc-shaped slot 3a4 is provided at the front end of the shell 3a, and an arc-shaped slot 3a4 is provided at the rear of the shell 3a above the intermediate layer 3b. The spring seat 3a1, the two sides of the back of the shell 3a are respectively provided with a fixed co-position gear 3a2, the co-position gear 3a2 is meshed with the worm 2c gear, and the two sides of the front end of the shell 3a are respectively provided with a rocker The arm slideway 3a3, the inside of the arc-shaped slot 3a4 is provided with a pole fastening switch 3c, the two sides of the rear end of the pole fastening switch 3c are provided with racks 3c1, and the two racks 3c1 A spring groove 3c2 is arranged in the middle, a spring 3e is arranged between the spring groove 3c2 and the spring seat 3a1, and a rocker arm limiting device 3f is arranged on the right side of the rack 3c1, and the rocker arm limiting device 3f It includes a gear 3f1 on the left side and a limit tooth 3f2 on the right side. The gear 3f1 is meshed with the rack 3c1. The rocker arm slideway 3a3 is provided with a rocker arm 3d inside the end of the rocker arm 3d. An arc-shaped non-slip rubber is fixed, a torsion spring I3d2 is provided between the rocker arm 3d and the shell 3a, and the center of the torsion spring I3d2 is provided with a connecting shaft 3d3, and the connecting shaft 3d3 passes through the middle layer 3b, The rocker arm return gear 3d4 is fixed on the connecting shaft 3d3 below the middle layer 3b, the connecting shaft 3d3 is fixedly connected with the rocker arm 3d, and the side of the rocker arm 3d is provided with a pawl slideway 3d5, The inside of the pawl slide 3d5 is provided with a pawl 3d1, the front end of the pawl 3d1 is stuck inside the limit tooth 3f2, and a torsion spring II 3d11 is provided between the pawl 3d1 and the rocker arm 3d. The rear end of the rocker arm 3d is provided with a travel switch 3g, and the travel switch 3g can be a direct-acting travel switch or a roller travel switch. The action principle of the direct-acting limit switch is similar to that of the button, the difference is that one is manual, and the other is bumped by the bumper of the moving part. When the impact block on the external moving part presses the button to make the contact move, when the moving part leaves, the contact automatically resets under the action of the spring; When the block) is pressed on the roller of the limit switch, the transmission bar rotates together with the rotating shaft, so that the cam pushes the bumper, and when the bumper hits a certain position, the micro switch is pushed to act quickly. After the iron stopper on the roller was removed, the back-moving spring resets the travel switch. This is a single-wheel automatic recovery travel switch. The two-wheel rotary limit switch can not be automatically restored, and it is restored by bumping against another roller when it relies on the moving machine to move in the opposite direction.

The inside of the shell 3a is located at the center below the middle layer 3b and is provided with a double output shaft motor III 3h, and the two ends of the double output shaft motor III 3h are provided with an output worm 3h1, and the output worm 3h1 is located in the double output shaft motor III 3h It can rotate freely without power on. The front end of the output worm 3h1 is meshed with an intermediate gear 3i, and the intermediate gear 3i is meshed with the rocker arm return gear 3d4.

Both sides below the horizontal plate 3 are hinged with support rods 6, a support rod slider 6a is provided between the support rod 6 and the main rod 2a, and one end of the support rod slider 6a is hinged with the support rod 6, The other end of the support bar slider 6a is located inside the support bar slideway 2d, and the inside of the hand wheel slideway 2a1 is pierced with a locking handwheel 6b, and the locking handwheel 6b and the support bar slider 6a threaded connection. The dual output shaft motor I1c, dual output shaft motor II1d, dual output shaft motor III3h, travel switch 3g, electric lifting rod 4, and power supply device 1a are respectively electrically connected to the control device 1b, and realize their respective functions through the control button 1g. action.

A method for using a multifunctional safety ladder, comprising the following steps:

Step 1, fix the bottom plate:

Drag the multifunctional safety ladder to the construction site, rotate the ladder wheel 5 after finding the placement area, and move up and down through the threaded part 5a31 on the upper part of the connecting rod 5a3 in the threaded hole 1h1 in the ladder wheel lifting block 1h to realize the ladder wheel 5 up and down Adjust the position, adjust the up and down positions of the four ladder wheels 5 to ensure that the bottom plate 1 and the ground are in a horizontal position.

Step 2, raise the ladder to the designated maintenance position:

Press the control button 1g, drive the double output shaft motor I1c and the double output shaft motor II1d to rotate through the control device 1b, and drive the ladder moving screw 1f and the lifting rod moving screw 1e to rotate, so that the ladder 2 and the electric lifting rod 4 move forward and backward on the bottom plate 1 Move while controlling the electric lifting rod 4 to rise upwards by the control device 1b until the front end of the horizontal plate 3 leans against the wall below the meter box inspection area. When the electric lifting rod 4 was raised upwards, the ladder 2 would rotate along the upper end of the main rod slider 7. At this time, the turbine shaft 7a fixed on the main rod slider 7 impelled the worm screw 2c inside the ladder 2 to rotate, and the worm screw 2c and the fixed The alignment gear 3a2 on the horizontal plate 3 is meshed and connected, so the rotation of the worm 2c drives the horizontal plate 3 to rotate around the axis where the horizontal plate 3 is hinged with the ladder 2, so that the horizontal plate 3 is always parallel to the bottom plate 1.

The rotation of the horizontal plate 3 pushes the support bar slider 6a at the lower end of the support bar 6 to slide in the handwheel slideway 2a1. When the operator climbs to the upper end of the ladder 2, tighten the locking hand wheel 6b to avoid the movement of the support bar slide block 6a during the operation. When the object that the front end of the horizontal plate 3 relies on is not a wall but an electric pole, the electric pole is close to the arc-shaped draw-in groove 3a4 at the front end of the horizontal plate 3, and the electric pole pushes the electric pole fastening switch 3c to move backward, and the electric pole The rack 3c1 on the rod fastening switch 3c drives the rocker arm limiter 3f to rotate, unlocks the locking of the ratchet 3d1 on the rocker arm 3d, and the rocker arm 3d pops out under the turning force of the torsion spring I 3d2 and hugs the electric pole . When the worker boards the ladder, the pressure on the wheel 5b is greater than the thrust of the thrust spring 5d, and the wheel body 5a falls and touches the ground, which further improves the stability of the ladder. After reaching the top of the ladder, the worker can put the work tool on the horizontal plate 3 superior.

Step three, recover the ladder:

After the operation is completed, unclamp the locking handwheel 6b and walk down the ladder 2, the pressure on the wheel 5b decreases, which is less than the thrust of the thrust spring 5d, and the wheel body 5a rises and breaks away from the ground. Press the control button 1g to drive the double output shaft motor III3h through the control device 1b, and the output worm 3h1 of the double output shaft motor III3h drives the rocker arm return gear 3d4 to rotate through the intermediate gear 3i, so that the rocker arm 3d overcomes the turning force of the torsion spring I3d2 and disengages The utility pole is recovered to the inside of the horizontal plate 3. When the pawl 3d1 running to its upper part is stuck inside the upper limit tooth 3f1 of the rocker arm limit device 3f, the travel switch 3g operates, and the control device 1b cuts off the power to the double output shaft motor III 3h. Power supply, double output shaft motor III 3h stop working. Press the control button 1g to drive the double output shaft motor I1c, double output shaft motor II1d and the electric lifting rod 4 through the control device 1b, contract the electric lifting rod 4 and move it to the rightmost end of the lifting rod slideway I1j, and move the main rod The slide block 7 moves to the leftmost end of the main rod slideway 1i, which reduces the height of the ladder 2, so that the ladder 2 moves closer to the base plate 1, which facilitates the movement of the multi-purpose safety ladder.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and can also be made without departing from the gist of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. Variations.

Claims (6)

1. A multifunctional safety ladder, comprising a ladder (2), is characterized in that: The lower end of the ladder (2) is provided with a base plate (1), the upper end of the ladder is hinged with a horizontal plate (3), the lower end of the base plate (1) is provided with a ladder wheel (5), the base plate (1) ) is provided with an electric elevating rod (4), and the electric elevating rod (4) is located on the right side of the ladder (2), The ladder (2) includes a main pole (2a) and a cross bar (2b), a hand wheel slideway (2a1) is provided on the upper side of the main pole (2a), and the inner axial direction of the main pole (2a) A worm (2c) is provided at a position above the center line, a support rod slideway (2d) is provided on the right side of the main rod (2a) below the axial centerline, and a lifting rod slideway II ( 2e), The left side of the base plate (1) is provided with a power supply device (1a), the right side of the power supply device (1a) is provided with a control device (1b), and the right side of the control device (1b) is provided with dual output Shaft motor I (1c), the two ends of the double output shaft motor I (1c) are provided with bevel gears I (1c1), and the right side of the double output shaft motor I (1c) is provided with a double output shaft motor II (1d), the two ends of the dual output shaft motor II (1d) are provided with bevel gears II (1d1), the two sides of the power supply device (1a) are provided with ladder moving screws (1f), and the ladder The right end of the moving screw (1f) is provided with a screw bevel gear II (1f1), the screw bevel gear II (1f1) meshes with the bevel gear I (1c1), and the ladder moves on the right side of the screw (1f). There is a lifting rod moving screw (1e), and the right end of the lifting rod moving screw (1e) is provided with a screw bevel gear I (1e1), and the screw bevel gear I (1e1) and the bevel gear II (1d1 ) meshing connection, the inside four corners of the bottom plate (1) are provided with ladder wheel lifting blocks (1h), the inside of the ladder wheel lifting block (1h) is provided with threaded holes (1h1), and the bottom plate (1) The main rod slideway (1i) is provided on the surface corresponding to the position of the ladder moving screw (1f), and the lifting rod slideway I (1j) is provided on the upper surface of the bottom plate (1) corresponding to the position of the lifting rod moving screw (1e), The side of the bottom plate (1) is provided with a control button (1g), The upper end of the electric elevating rod (4) is hinged with a elevating rod slider (4a), and the elevating rod slider (4a) is located inside the elevating rod slideway II (2e), and the electric elevating rod (4) The lower end is provided with a lifting rod moving block (4c), and the lifting rod moving block (4c) is located inside the lifting rod slideway I (1j), and the center of the lifting rod moving block (4c) is provided with a threaded hole. The threaded hole in the center of the lifting rod moving block (4c) is threadedly connected with the lifting rod moving screw rod (1e), and the lower part of the lifting rod moving block (4c) is provided with a slip ring (4b) on the bottom surface of the base plate (1), The inside of the slip ring (4b) is slidingly provided with a carbon brush (4d), and the carbon brush (4d) is fixedly connected with the electric lifting rod (4), and the electric lifting rod (4) passes through the carbon brush (4d) ), the slip ring (4b) is electrically connected with the power supply unit (1a), A main rod slider (7) is arranged between the ladder (2) and the bottom plate (1), the upper end of the main rod slider (7) is hinged with the main rod (2a), and the main rod slider (7) The lower end is arranged inside the main rod slideway (1i), and a fixed turbine shaft (7a) is arranged in the middle of the main rod slider (7), and the turbine shaft (7a) and the worm (2c) ) gear meshing connection, The horizontal plate (3) includes a casing (3a), an intermediate layer (3b) is provided in the middle of the casing (3a), an arc-shaped slot (3a4) is provided at the front end of the casing (3a), and the The back of the housing (3a) is located above the middle layer (3b) and is provided with a spring seat (3a1), and the two sides of the back of the housing (3a) are respectively provided with a co-position gear (3a2) fixed therewith, and the co-position The gear (3a2) is meshed with the worm (2c) gear, and a rocker slideway (3a3) is provided on both sides of the front end of the casing (3a), and a pole is provided inside the arc-shaped slot (3a4) fastening switch (3c), the pole fastening switch (3c) is provided with racks (3c1) on both sides of the rear end, and a spring groove (3c2) is provided in the middle of the two toothed racks (3c1). A spring (3e) is provided between the spring groove (3c2) and the spring seat (3a1), and a rocker arm limiter (3f) is provided on the right side of the rack (3c1), and the rocker arm limiter The device (3f) includes a gear (3f1) on the left side and a limit tooth (3f2) on the right side, the gear (3f1) is meshed with the rack (3c1), and the rocker slideway ( 3a3) There is a rocker arm (3d) inside, a torsion spring I (3d2) is arranged between the rocker arm (3d) and the casing (3a), and a connecting shaft ( 3d3), the connecting shaft (3d3) passes through the middle layer (3b), and the rocker return gear (3d4) is fixed on the connecting shaft (3d3) below the middle layer (3b), and the The connecting shaft (3d3) is fixedly connected with the rocker arm (3d), the side of the rocker arm (3d) is provided with a pawl slideway (3d5), and the inside of the pawl slideway (3d5) is pierced with a pawl ( 3d1), the front end of the pawl (3d1) is stuck inside the limit tooth (3f2), and a torsion spring II (3d11) is provided between the pawl (3d1) and the rocker arm (3d), and the The rear end of the rocker arm (3d) is provided with a travel switch (3g), A dual output shaft motor III (3h) is provided inside the housing (3a) at the center below the middle layer (3b), and output worms (3h1) are provided at both ends of the dual output shaft motor III (3h), The output worm (3h1) can rotate freely when the double output shaft motor III (3h) is not energized, the front end of the output worm (3h1) is meshed with an intermediate gear (3i), and the intermediate gear ( 3i) It is meshed with the rocker arm return gear (3d4), Support bars (6) are hinged on both sides below the horizontal plate (3), and support bar sliders (6a) are arranged between the support bars (6) and the main bar (2a). One end of the slider (6a) is hinged to the support rod (6), the other end of the support rod slider (6a) is set inside the support rod slideway (2d), and the inside of the handwheel slideway (2a1) is pierced with Locking the handwheel (6b), the said locking handwheel (6b) is threadedly connected with the support bar slider (6a), The dual output shaft motor I (1c), the dual output shaft motor II (1d), the dual output shaft motor III (3h), the travel switch (3g), the electric lifting rod (4), and the power supply unit (1a) are respectively connected with The control device (1b) is electrically connected, and realizes respective actions through the control button (1g). 2. A multifunctional safety ladder according to claim 1, characterized in that: The ladder wheel (5) includes a wheel body (5a) and a wheel (5b), the middle of the wheel (5b) is provided with a rotating shaft (5b1), and the wheel (5b) is arranged on the wheel body (5a) Inside, the wheel body (5a) is provided with a rotating shaft chute (5a1) above the rotating shaft (5b1), and a damping rod chute (5a2) is provided above the wheel body (5a), A damping rod (5c) is provided between the rotating shaft chute (5a1) and the damping rod chute (5a2), and a lower end block (5c1) is provided at the lower end of the damping rod (5c). The lower end block (5c1) is located inside the rotating shaft chute (5a1), the upper end of the shock absorbing rod (5c) is provided with an upper end block (5c2), and the upper end block (5c2) is located in the shock absorbing rod chute ( 5a2), the inside of the damping rod chute (5a2) is located above the upper end block (5c2) with a thrust spring (5d), and the upper end of the wheel body (5a) is provided with a connecting rod (5a3), so The connecting rod (5a3) is provided with a threaded portion (5a31), and the threaded portion (5a31) is tightly connected to the threaded hole (1h1) inside the ladder wheel lifting block (1h). 3. A multifunctional safety ladder according to claim 1, characterized in that: The inner side of the end of the rocker arm (3d) is fixed with arc-shaped anti-slip rubber. 4. A multifunctional safety ladder according to claim 1, characterized in that: The travel switch (3g) can be a direct-acting travel switch or a roller travel switch. 5. A multifunctional safety ladder according to claim 1, characterized in that: The length of the horizontal plate (3) is greater than the thickness of the meter box. 6. The method for using a multifunctional safety ladder according to claim 1, characterized in that: comprising the following steps: Step 1, fix the bottom plate: Drag the multi-functional safety ladder to the construction site, find the place to place it, and then rotate the ladder wheel (5), and pass the threaded part (5a31) on the upper part of the connecting rod (5a3) into the threaded hole (1h1) in the ladder wheel lifting block (1h). ) to move up and down to realize the adjustment of the up and down positions of the ladder wheels (5), adjust the up and down positions of the four ladder wheels (5), and ensure that the bottom plate (1) and the ground are in a horizontal position; Step 2, raise the ladder to the designated maintenance position: Press the control button (1g), drive the dual output shaft motor Ⅰ (1c) and the dual output shaft motor Ⅱ (1d) to rotate through the control device (1b), and drive the ladder moving screw (1f) and the lifting rod moving screw (1e) to rotate , so that the ladder (2) and the electric lifting rod (4) move back and forth on the bottom plate (1), and at the same time, the control device (1b) controls the electric lifting rod (4) to rise upward until the front end of the horizontal plate (3) leans against the electric meter on the wall below the box access area, When the electric elevating rod (4) rose upwards, the ladder (2) would rotate along the upper end of the main rod slide block (7), and at this moment the turbine shaft (7a) fixed on the main rod slide block (7) impelled the ladder ( 2) The internal worm (2c) rotates, and the worm (2c) meshes with the co-located gear (3a2) fixed on the horizontal plate (3), so the rotation of the worm (2c) drives the horizontal plate (3) around the horizontal plate (3 ) is rotated on the axis hinged with the ladder (2), so that the horizontal plate (3) is always parallel to the bottom plate (1), The rotation of the horizontal plate (3) pushes the support bar slider (6a) at the lower end of the support bar (6) to slide in the hand wheel slideway (2a1). When the operator climbs to the upper end of the ladder (2), tighten the locking hand wheel ( 6b), to avoid movement of the support bar slider (6a) during the operation, When the object on the front end of the horizontal plate (3) is not a wall but an electric pole object, put the electric pole close to the arc-shaped slot (3a4) at the front end of the horizontal plate (3), and the electric pole pushes the electric pole tightly. The fastening switch (3c) moves backward, and the rack (3c1) on the electric pole fastening switch (3c) drives the rocker arm limiter (3f) to rotate, and the ratchet (3d1) on the rocker arm (3d) is released. locked, the rocker arm (3d) pops out under the turning force of the torsion spring I (3d2) and holds the pole tightly, When the worker climbs the ladder, the pressure on the wheel (5b) is greater than the thrust of the thrust spring (5d), and the wheel body (5a) falls and touches the ground, which further improves the stability of the ladder. After reaching the top of the ladder, the worker can move the work The tool is placed on the horizontal plate (3); Step three, recover the ladder: After the operation is completed, loosen the locking handwheel (6b) and step down the ladder (2), the pressure on the wheel (5b) decreases, which is less than the thrust of the thrust spring (5d), and the wheel body (5a) rises and leaves the ground , Press the control button (1g) to drive the double output shaft motor III (3h) through the control device (1b), and the output worm (3h1) of the double output shaft motor III (3h) drives the rocker arm return gear ( 3d4) Rotate so that the rocker arm (3d) overcomes the turning force of the torsion spring I (3d2) and separates from the utility pole to recover inside the horizontal plate (3). (3f) When the upper limit tooth (3f1) is inside, the limit switch (3g) acts, and the power supply to the double output shaft motor III (3h) is cut off through the control device (1b), and the double output shaft motor III (3h) stops working, Press the control button (1g) to drive the dual output shaft motor Ⅰ (1c), dual output shaft motor Ⅱ (1d) and the electric lifting rod (4) through the control device (1b), shrink the electric lifting rod (4) and move it Move to the rightmost end of the lifting rod slideway Ⅰ (1j), move the main rod slide block (7) to the leftmost end of the main rod slideway (1i), lower the height of the ladder (2) so that the ladder (2) moves toward the bottom plate (1) Move closer to facilitate the movement of the multi-purpose safety ladder.