Lifting platform device

Abstract

To provide a lifting platform device that suppresses shaking of a work platform when support legs move up and down.SOLUTION: A lifting platform device comprises: a carriage section 2 equipped with wheels 8; a lifting mechanism 4 equipped with a work platform 5; a frame body 6 equipped with support legs 7; a pressing section provided on the lifting mechanism 4 for pressing the frame body 6; and a plurality of rollers provided on the frame body 6. The wheel-side frame body, which is the portion of the frame body on the side of the wheels 8, is configured to be pressed by the plurality of rollers. This configuration enables the work platform to be raised and lowered without rattling and suppresses shaking of the work platform.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lifting platform device. [Background technology]

[0002] BACKGROUND ART Conventionally, there is a lifting platform device provided with support legs for preventing the work platform from tipping over when it is raised (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-277967 Summary of the Invention [Problem to be solved by the invention]

[0004] The problem with Patent Document 1 is that the support legs tend to wobble when they move up and down.

[0005] SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a lifting platform device that suppresses shaking of the work platform when the support legs move up and down. [Means for solving the problem]

[0006] The present invention is characterized by comprising a cart section with wheels, a lifting device with a workbench, a frame body with support legs, a pressing section provided on the lifting device for pressing the frame body, and a plurality of rollers provided on the frame body, wherein the frame body on the wheel side can be pressed by the plurality of rollers. [Effects of the Invention]

[0007] According to the lifting platform device of the present invention, shaking of the work platform due to the up and down movement of the support legs is suppressed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front perspective view showing a lowered state of the lifting platform device according to the first embodiment of the present invention. [Figure 2] FIG. 10 is a rear perspective view showing the lifting platform device in a lowered state. [Figure 3] FIG. 10 is a side view showing the lifting platform device in a lowered state. [Figure 4] FIG. [Figure 5] FIG. 10 is a perspective view showing the boarding state with the door in the sloped position. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. 10 is a front perspective view showing a lowered state of the lifting platform device according to the second embodiment of the present invention. [Figure 13] FIG. 10 is a rear perspective view showing the lifting platform device in a lowered state. [Figure 14] FIG. 4 is a cross-sectional view showing the lifting platform device in a lowered state according to the first embodiment. [Figure 15] FIG. [Figure 16] FIG. [Figure 17] FIG. [Figure 18] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below do not limit the content of the present invention as defined in the claims. Furthermore, not all of the configurations described below are necessarily essential requirements of the present invention. [Example]

[0010] In this embodiment, a first embodiment of the lifting platform device of the present invention will be described below with reference to Figures 1 to 11. The lifting platform device 1 of this embodiment includes a carriage 2, a lifting drive device 3 disposed inside the carriage 2, and a work platform 5 supported by a lifting device 4 with a multi-stage mast disposed above the carriage 2.

[0011] The bogie section 2 comprises a rectangularly assembled frame body 6, four support legs 7 which are support parts erected downward at the four corners of the frame body 6, four wheels 8 which are wheel parts arranged below the frame body 6, two front and rear connecting rods 9 which are connecting parts connecting the left and right wheels 8, and four lift arms 10A, 10B connected to the frame body 6.

[0012] The support legs 7 are so-called outriggers, and have the function of suppressing the swinging of the lifting platform device 1 during operation. The support legs 7 can also be pulled out in the left and right directions, and when used in the pulled-out state, the lifting platform device 1 can be made more stable.

[0013] Each of the connecting rods 9 is provided with a side connecting rod 11 that connects the left and right ends of the connecting rods 9 to each other.

[0014] The rectangular lower portion 6A of the frame 6 is provided with a rectangular wheel-side frame 12 that is made up of a connecting rod 9 and a side connecting rod 11 and can move up and down freely. A plurality of guide portions 13 made of resin blocks are arranged on the inner surface of the wheel-side frame 12.

[0015] Next, the lift arms 10A and 10B will be described.

[0016] The front lift arm 10A has a linear configuration, and is rotatably connected to a bearing portion 14 provided on the frame body 6 via a mounting shaft 15 with the bearing portion 14 sandwiched therebetween.

[0017] The end of the lift arm 10A opposite to the bearing portion is rotatably connected to the front portion of a connecting body 16 via a mounting shaft 17.

[0018] The rear lift arm 10B has an L-shaped configuration, and is rotatably connected to a bearing portion 18 provided on the frame body 6 via a mounting shaft 19 with the bearing portion 18 sandwiched therebetween.

[0019] A resin roller 20 is attached to the end of the lift arm 10B opposite the bearing portion 18 via a fulcrum shaft 21. This resin roller 20 can be pressed through an opening 22 formed in the upper part of the frame body 6.

[0020] The bent portion 23 of the lift arm 10B is rotatably connected to the rear portion of the connector 16 via a mounting shaft 24.

[0021] The connecting body 16 is provided with resin rollers 25 and 26 at the front and rear ends, respectively.

[0022] When the support leg 7 is raised or lowered, the pressing portion 27 provided at the bottom of the second mast 4A of the lifting device 4 comes into contact with the upper surface of the resin roller 20 of the rear lift arm 10B, and as the lift arms 10A and 10B rotate, the connecting body 16 moves on the side connecting rods 11, pressing each side connecting rod 11 at two points with the two resin rollers 25 and 26, causing the side connecting rods 11 to move up and down without rattling. In addition, the lower part of the frame 6 is guided vertically by the guide portion 13 of the wheel-side frame 12, preventing the work platform 5 from shaking.

[0023] The workbench 5 has a rectangular work floor 28 and handrails 29 erected so as to surround the periphery of the work floor 28. An opening 30 is provided in front of the handrail 29, and a right front post 31 and a left front post 32 that form the opening 30 are provided with a door 33 that can open and close the opening 30.

[0024] The upper ends of the right frame 34 and the left frame 35 of the door 33 are connected to the right front post 31 and the left front post 32 so as to be vertically slidable and rotatable.

[0025] The door 33 has grips 36 and 37 at the top of the right and left frames 34 and 35, respectively.

[0026] Steps 38 are provided at the bottom of the right frame 34 and left frame 35 of the door 33. The planar direction of the step 38 is inclined relative to the right frame 34 and left frame 35, making it easier for workers to climb up and down in the sloped state described below.

[0027] The right frame 34 and the left frame 35 of the door 33 are provided at their lower ends with downwardly extending restricting protrusions 40 that can be engaged with restricting recesses 39 formed in the front part of the work floor 28 .

[0028] The front of the upper step of the handrail 29 is provided in a flip-up type, and a restricting part 42 is provided for restricting the flip-up action of the flip-up part 41.

[0029] The regulating portion 42 has an engaging groove 43 formed in the lower part of the flip-up portion 41, a hook-shaped engaging piece 44 that can be engaged with the engaging groove 43, a regulating operation rod 45 that is rotatably attached to the right front end pillar 31 to attach the engaging piece 44, and a regulating pressing portion 46 that is provided on the frame body 6 for pushing up the regulating operation rod 45.

[0030] To release the restriction on the pop-up portion 41, the workbench 5 is lowered and the restriction action rod 45 presses against the restriction pressing portion 46, and the locking piece 44 rotates from the locked state with the locking groove 43 to the unlocked state, and the restriction on the pop-up portion 41 is released.

[0031] In this embodiment, the device comprises a cart section 2 equipped with wheels 8, a lifting mechanism 4 equipped with a workbench 5, a frame body 6 equipped with support legs 7, a pressing section 27 equipped on the lifting mechanism 4 for pressing the frame body 6, and a plurality of rollers 25, 26 equipped on the frame body 6, and the plurality of rollers 25, 26 are capable of pressing the wheel side frame body 12, which is the frame body on the wheel 8 side, so that the workbench can be raised and lowered without rattling and shaking of the workbench can be suppressed.

[0032] Furthermore, in this embodiment, the guide portion 13 that guides the carriage portion 2 so that it can move up and down in a direction parallel to the lifting direction is provided, so that the shaking of the workbench 5 can be further suppressed.

[0033] In this embodiment, the workbench 5 is provided with a handrail 29 erected on the workbench 5, an opening 30 formed in the handrail 29, and a door 33 provided in the opening 30, and the door 33 is switchable between a closed state in which the opening 30 is closed and a sloped state in which the opening 33 is opened and the workbench 5 is erected on the installation surface, thereby making it easier to get on to the workbench 5.

[0034] In addition, in this embodiment, the door 33 is provided with a regulating protrusion 40 as a regulating part at the lower end, and the workbench 5 is provided with a regulating recess 39 as a regulating holding part that holds the regulating protrusion 40, thereby preventing the door 33 from inadvertently switching to a sloped state.

[0035] In addition, in this embodiment, a part of the handrail 29 is a flip-up handrail equipped with a flip-up section 41 that can be rotated upward, and a regulating section 42 is provided as a regulating means that allows the flip-up section 41 to be rotated only when the work platform 5 is in the lowered state, thereby preventing the flip-up section 41 from flipping up when the lifting platform device is in the raised state.

[0036] In addition, in this embodiment, the regulating section 42 comprises a regulating operation rod 45 provided on the handrail 29, a regulating pressing section 46 provided on the trolley section 2 that presses the regulating operation rod 45, a locking piece 44 that can rotate in accordance with the up and down movement of the regulating operation rod 45, and a locking groove 43 as a locking receiving section in which the locking piece 44 can be locked, thereby making it possible to reliably prevent the pop-up section from bouncing up using a simple mechanism. [Example]

[0037] In this embodiment, a second embodiment of the lifting platform device of the present invention will be described below with reference to FIGS.

[0038] In this embodiment, the support posts 47 at the four corners of the handrail 29 of the workbench 5 are equipped with upward extension bars 48 built into the support posts 47. These upward extension bars 48 are made of PVC pipes or steel pipes and are intended to protect the heads of workers working on the workbench 5. They are pulled out upward from the hollow support posts 47 and positioned and fixed above the support posts 47 by fixing means 49 such as pins. Various types of pins can be used in addition to spring-type ones such as plungers.

[0039] Furthermore, the pressing portion 51 provided on the lifting device 50, which is a scissors link mechanism, and the rear lift arm 10B' are linearly configured and are rotatably connected to the bearing portion 18 provided on the frame 6 via a mounting shaft 27 with the bearing portion 18 sandwiched between them. The end of the lift arm 10B opposite the bearing portion 18 is attached to the connecting body 16 via a mounting shaft 52.

[0040] The connecting body 16 has a pressure receiving portion 54 at the middle thereof, which has a resin roller 53 at its upper end. The pressure receiving portion 54 can be pressed through an opening 55 formed in the upper part of the frame body 6.

[0041] When the support legs 7 are raised or lowered, the pressure portion 51 of the lifting device 50 comes into contact with the pressure receiving portion 53, and as the lift arms 10A and 10B rotate, the connecting body 16 moves on the side connecting rods 11, pressing each of the side connecting rods 11 at two points with the two resin rollers 25 and 26, causing the side connecting rods 11 to move up and down without rattling. In addition, the lower part of the frame 6 is guided vertically by the guide portion 13 of the wheel-side frame 12, preventing the workbench 5 from shaking.

[0042] In this embodiment, the device comprises a cart section 2 equipped with wheels 8, a lifting mechanism 50 equipped with a workbench 5, a frame body 6 equipped with support legs 7, a pressing section 51 equipped in the lifting mechanism 50 for pressing the frame body 6, and a plurality of rollers 25, 26 equipped in the frame body 6, and the plurality of rollers 25, 26 are capable of pressing the wheel side frame body 12, which is the frame body on the wheel 8 side, so that the workbench can be raised and lowered without rattling and shaking of the workbench can be suppressed.

[0043] Furthermore, in this embodiment, the guide portion 13 that guides the carriage portion 2 so that it can move up and down in a direction parallel to the lifting direction is provided, so that the shaking of the workbench 5 can be further suppressed.

[0044] In addition, in this embodiment, an upward extension bar 48, which is a rod-shaped body that can be freely raised and lowered, is provided at the upper end of the support post 47 that constitutes the handrail 29, thereby providing protection for workers working on the workbench 5.

[0045] In the above-described embodiments, the number and positions of the pressing portions and the number and positions of the resin rollers can be changed as appropriate. Also, the configuration of the lifting device can be changed as appropriate. [Explanation of symbols]

[0046] 1 Lifting platform device 2 Bogie section 4 Lifting device 6 Frame 7 Support legs 8 wheels 12 Wheel side frame body 13 Information Department 25 Resin roller (front of connecting body) 26 Resin roller (rear of connecting body) 27 Pressing section (second mast) 50 Lifting device

Claims

1. a carriage portion provided with wheels; a lifting device equipped with a work platform; a frame body having support legs; a pressing portion provided in the lifting device and configured to press the frame body; a plurality of rollers provided on the frame body, A lifting platform device characterized in that the plurality of rollers are capable of pressing the frame body on the wheel side.

2. The lifting platform device is characterized by comprising a guide portion that can guide the carriage portion in a direction parallel to the lifting direction.

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