Lifting device

Abstract

The present application aims at suppressing the size increase of an elevator. The elevator comprises a column, an elevator member guided by the column, a motor generating power for elevating the elevator member, a controller controlling the motor, a housing fixed to at least a part of the column and accommodating the motor and the controller, a transmission mechanism transmitting the power of the motor to the elevator member, and a battery mounting portion provided in the housing and mounting a battery pack for supplying power to the motor.

Description

Technical Field

[0001] The technology disclosed in this specification relates to lifting devices. Background Technology

[0002] In the field of lifting devices, lifting devices such as those disclosed in Patent Document 1 are known.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent document 1: Japanese Patent Application Publication No. 2015-110459. Summary of the Invention

[0006] There is an urgent need to curb the large-scale development of lifting devices in order to allow for more flexible operation of them.

[0007] The purpose of the technology disclosed in this specification is to prevent the scaling up of lifting devices.

[0008] This specification discloses a lifting device. The lifting device may include: a column, a lifting component guided by the column, a motor that generates power to raise and lower the lifting component, and a controller that controls the motor. The lifting device may also include: a housing fixed to at least a portion of the column and housing the motor and controller, and a transmission mechanism that transmits the power of the motor to the lifting component. The lifting device has a battery mounting section disposed within the housing and for mounting a battery pack that supplies power to the motor.

[0009] Based on the above configuration, the size of the lifting and suppressing device can be increased. Attached Figure Description

[0010] Figure 1 This is a perspective view of the lifting device as seen from the front, representing the implementation method.

[0011] Figure 2 This is a perspective view of the lifting device as seen from the rear, representing the implementation method.

[0012] Figure 3 This is a front view showing the lifting device of the embodiment.

[0013] Figure 4 This is a rear view showing the lifting device in the embodiment.

[0014] Figure 5 This is a top view showing the lifting device of the embodiment.

[0015] Figure 6 This is a bottom view showing the lifting device in the embodiment.

[0016] Figure 7This is a right view showing the lifting device in the embodiment.

[0017] Figure 8 This is a left view showing the lifting device in the embodiment.

[0018] Figure 9 This is a perspective view taken from the rear, showing a portion of the lifting device according to the embodiment.

[0019] Figure 10 This is a cross-sectional view showing a portion of the lifting device in the embodiment.

[0020] Figure 11 This is a perspective view taken from the rear, showing a portion of the lifting device according to the embodiment.

[0021] Figure 12 This is a perspective view of the stop braking mechanism as shown in the embodiment.

[0022] Figure 13 This is a cross-sectional view showing the stop braking mechanism of the embodiment.

[0023] Figure 14 This is a cross-sectional view showing a portion of the lifting device in the embodiment.

[0024] Figure 15 This is a perspective view of the slider as shown from the rear, representing the implementation method.

[0025] Figure 16 This is a perspective view of the upper end of the column in the embodiment, viewed from above.

[0026] Figure 17 This is a cross-sectional view showing a portion of the lifting device in the embodiment.

[0027] Figure 18 This is a schematic front view illustrating the transmission mechanism of the implementation method.

[0028] Figure 19 This is a perspective view of the lifting device as seen from the front, representing the implementation method.

[0029] Figure 20 This is a cross-sectional view of the upper part of the column in the embodiment.

[0030] Figure 21 This is a cross-sectional view showing the lower part of the column in the embodiment.

[0031] Figure 22 This is a cross-sectional view of the upper part of the column in the embodiment.

[0032] Figure 23 This is a front view showing the upper part of the column in the embodiment.

[0033] Figure 24 This is a cross-sectional view showing a portion of the transmission mechanism in the implementation method.

[0034] Figure 25 This is a cross-sectional view showing a portion of the deceleration mechanism in the embodiment.

[0035] Figure 26 This is a cross-sectional view showing a portion of the deceleration mechanism in the embodiment.

[0036] Figure 27 This is a cross-sectional view showing a portion of the deceleration mechanism in the embodiment.

[0037] Figure 28 This is a perspective view of the locking mechanism of the embodiment, viewed from the rear.

[0038] Figure 29 This is a perspective view of the locking mechanism of the embodiment, viewed from the front.

[0039] Figure 30 This is a perspective view of the locking mechanism of the embodiment, viewed from the front.

[0040] Figure 31 This is a perspective view of the locking mechanism of the embodiment, viewed from the rear.

[0041] Figure 32 This is a perspective view taken from the rear, showing a portion of the locking mechanism in the embodiment.

[0042] Figure 33 This is a perspective view taken from the rear, showing a portion of the locking mechanism in the embodiment.

[0043] Figure 34 This is a diagram of an elevator device showing the locked state of the locking mechanism of the embodiment.

[0044] Figure 35 This is a front view showing the lifting device of the second embodiment.

[0045] Figure 36 This is a front view showing the transmission mechanism of the second embodiment.

[0046] Figure 37 This is a cross-sectional view showing the transmission mechanism of the second embodiment.

[0047] Figure 38 This is a cross-sectional view showing the transmission mechanism of the second embodiment.

[0048] Figure 39 This is a cross-sectional view showing the transmission mechanism of the second embodiment.

[0049] Figure 40This is a perspective view taken from the rear, showing the main parts of the transmission mechanism in the second embodiment.

[0050] Figure 41 This is a perspective view taken from the front, showing the main parts of the transmission mechanism in the second embodiment.

[0051] [Explanation of Labels in the Attached Image]

[0052] 1…Lifting device, 2…Moving frame, 3…Wheel, 3L…Wheel, 3R…Wheel, 4…Small caster, 4L…Small caster, 4R…Small caster, 5…Protective part, 5L…Protective part, 5R…Protective part, 6…Column, 7…Handle, 8…Lifting component, 9…Motor, 10…Controller, 11…Transmission mechanism, 12…Housing, 12A…Intake port, 12B…Exhaust port, 12G…Guide groove, 13…Battery mounting part, 13A…First battery mounting part, 13B…Second battery mounting part, 14…Light unit, 15…Operating device, 15A…Power on / off button, 15B…Up button, 15C…Down button, 15D…Lighting button, 16…Display device, 16A…Power display part, 16B… …Remaining quantity display, 17…stop braking mechanism, 18…locking mechanism, 18A…first locking mechanism, 18B…second locking mechanism, 19…main frame, 19B…rear frame, 19L…left frame, 19R…right frame, 20…subframe, 21…main board (support plate), 21L…main board, 21R…main board, 22…subplate (support plate), 22L…subplate, 22R…subplate, 23…bolt, 24…axle, 25…cover, 25L…cover, 25R…cover, 26…bolt, 27…bracket, 28…screw, 29…screw hole, 30…slider, 30L…left part, 30R…right part, 30T…upper contact part, 30B…lower contact part, 31…arm, 31L…arm, 31R…arm, 32…platform Part, 33…backplate, 34…guide groove, 34L…guide groove, 34R…guide groove, 35…guide opening, 36…roller, 36L…roller, 36R…roller, 37…bolt, 38…screw, 39…battery pack, 39A…first battery pack, 39B…second battery pack, 40…brake component, 40L…brake component, 40R…brake component, 41…brake handle, 41A…cam part, 41B…handle part, 41C…cam surface, 42…brake lever, 42A…screw part, 42B…nut, 42C…nut, 43…brake support component, 43L…left plate part, 43R…right plate part, 43U…upper plate part, 44…cover component, 44A…protrusion, 45…protective part, 46…drive shaft 47…pivot, 48…protective part, 48A…recess, 48B…opening, 49…rotating body, 49A…curved surface, 49B…plane, 49T…hole, 50…lifting pulley, 51…column pulley, 52…cable, 53…drive shaft assembly, 54…bearing, 55…drive shaft assembly, 56…bracket, 57…support plate, 58…bearing, 59…cover, 60…upper limit sensor, 60A…contact, 61…lower limit sensor, 61A…contact, 62…light emitter, 62A…light-emitting element, 62B…circuit board, 63…light-transmitting part, 64…spindle, 64A…thread, 65…reduction mechanism, 66…bearing housing, 66A…first bearing housing, 66B…second bearing housing, 67…gearbox67A… Gearbox 1, 67B… Gearbox 2, 68… Screw, 69… Opening, 70… Stator, 71… Rotor, 72… Rotor core, 73… Rotor drive shaft, 74… Bearing, 75… Bearing, 76… Fan, 77… Fan cover, 78… Input gear, 79… Bearing, 79A… Bearing, 79B… Bearing, 80… Bearing, 81… Bearing, 82… Bushing, 82A… Bushing, 82B… Bushing, 83… First intermediate gear, 84… Second intermediate gear, 85… Output gear, 86… Bearing, 86A… Bearing, 86B… Bearing, 87… One-way bearing (suppression component), 88… Nut, 88A…Cylinder, 88B…Flange, 88C…Threaded Groove, 89…Sleeve, 89A…Cylinder, 89B…Annular, 90…Pin, 91…Recess, 92…Locking Rod, 94…Support Component, 94A…Drive Shaft, 95…Torsion Spring, 96…Locking Pin, 97…First Opening, 98…Second Opening, 99…Bracket, 100…Fixed Cam, 101…Rotating Cam, 102…Locking Pin Rod, 103…Helical Spring, 104…Hook Component, 105…Third Opening, 106…Torsion Spring, 107…Sliding Bearing, 110…Intermediate Drive Shaft, 112…Thread, 114…Threaded Groove, 120… 1. Support component, 121…Flange, 122…Cylinder, 130…Second support component, 131…Flange, 132…Cylinder, 140…Drive-side clutch, 141…First washer, 142…Protrusion, 143…Recess, 150…Driven-side clutch, 151…Second washer, 152…Recess, 153…Protrusion, 160…Outer cylinder, 170…Needle roller bearing, 201…Lifting device, 209…Motor, 211…Transmission mechanism, 264…Main shaft, 264A…Curved surface, 264B…Plane, 264T…Front end, 265…Reduction mechanism, 268…Screw, 270…Stator, 27 1…Rotor, 272…Rotor core, 273…Rotor drive shaft, 274…Bearing, 275A…Bearing, 275B…Bearing, 275R…Anti-slip ring, 276…Fan, 278…Input gear (1st gear), 283…1st intermediate gear (3rd gear), 284…2nd intermediate gear (3rd gear), 284L…Rod, 285…Output gear (2nd gear), 285A…Key, 287…One-way bearing, 300…Clutch section, 671…Slot, AX…Rotating shaft (1st rotating shaft), BX…Rotating shaft (3rd rotating shaft), CX…Rotating shaft (2nd rotating shaft), S…Transporting object. Detailed Implementation

[0053] In one or more embodiments, the lifting device may include: a column, a lifting component guided by the column, a motor that generates power to raise and lower the lifting component, and a controller that controls the motor. The lifting device includes a housing fixed to at least a portion of the column and housing the motor and controller, and a transmission mechanism that transmits the motor's power to the lifting component. The lifting device may have a battery mounting section disposed within the housing and for mounting a battery pack that supplies power to the motor.

[0054] In the above configuration, the motor, controller, and battery mounting section are all housed within the housing. Therefore, the size of the lifting device can be prevented from increasing. Furthermore, since the motor, controller, and battery mounting section are all housed within the housing, the length of the cables connecting these components can be prevented from increasing.

[0055] In one or more embodiments, at least a portion of the lifting component can be raised and lowered at the front of the column. The housing can be fixed to the rear surface of the column.

[0056] In the above configuration, the lifting component can move up and down smoothly.

[0057] In one or more embodiments, the housing may be fixed to the central part of the column in the vertical direction.

[0058] In the above configuration, the user of the lifting device can easily install the battery pack into the battery mounting section located in the housing.

[0059] In one or more embodiments, at least a portion of the transfer mechanism may be housed within the housing.

[0060] In the above configuration, the transmission mechanism is also concentrated in the housing, thus preventing the lifting device from becoming too large. Furthermore, since the transmission mechanism is located near the motor, its complexity and size are also prevented.

[0061] In one or more embodiments, the transmission mechanism may include a speed reduction mechanism for slowing down the rotation of the motor, and the speed reduction mechanism may be housed in the housing.

[0062] In the above configuration, since the reduction mechanism is concentrated in the housing, the size of the lifting device can be prevented. Furthermore, since the reduction mechanism is positioned near the motor, the complexity and size of the reduction mechanism can be prevented.

[0063] In one or more embodiments, the battery mounting portion may be disposed on the outer surface of the housing.

[0064] In the above configuration, the user of the lifting device can easily install the battery pack in the battery mounting section. Furthermore, it helps to prevent the casing from becoming too large.

[0065] In one or more embodiments, the battery mounting section may include a first battery mounting section and a second battery mounting section.

[0066] In the above configuration, the user of the lifting device can install a battery pack in the appropriate battery mounting section of the first battery mounting section and the second battery mounting section according to, for example, the usage of the lifting device.

[0067] In one or more embodiments, a battery pack with a first rated voltage can be installed in the first battery mounting section, and a battery pack with a second rated voltage can be installed in the second battery mounting section.

[0068] In the above configuration, the user of the lifting device can effectively utilize two battery packs with different rated voltages.

[0069] In one or more embodiments, the second battery mounting section may be disposed next to the first battery mounting section.

[0070] In the above configuration, the user of the lifting device can smoothly install the battery pack into either the first battery mounting section or the second battery mounting section.

[0071] In one or more embodiments, the lifting device includes a cover component that covers the second battery mounting portion when the battery pack is installed in the first battery mounting portion, and covers the first battery mounting portion when the battery pack is installed in the second battery mounting portion.

[0072] In the above configuration, the simultaneous installation of two battery packs can be prevented. If two battery packs are installed simultaneously, it could lead to increased complexity in the electronic circuitry or control. By preventing the simultaneous installation of two battery packs, the complexity of the electronic circuitry and control is suppressed. Furthermore, since the battery mounting sections of the first and second battery mounting sections that do not have battery packs installed are covered by the cover component, the battery mounting sections are protected.

[0073] In one or more embodiments, the cover component is slidably supported on the housing.

[0074] In the above configuration, the user of the lifting device can easily cover either the first battery mounting section or the second battery mounting section by means of the sliding cover component.

[0075] In one or more embodiments, the relative positions of the first battery mounting portion and the second battery mounting portion are determined such that when the battery pack is mounted in the first battery mounting portion, it is impossible to mount the battery pack in the second battery mounting portion, and when the battery pack is mounted in the second battery mounting portion, it is impossible to mount the battery pack in the first battery mounting portion.

[0076] In the above configuration, for example, even without the cover component, if a second battery pack is to be installed in a second battery mounting section when the first battery pack is installed in the first battery mounting section, the second battery pack cannot be installed in the second battery mounting section because it will encounter the first battery pack installed in the first battery mounting section. Similarly, if a first battery pack is to be installed in a first battery mounting section when the second battery pack is installed in the second battery mounting section, the first battery pack cannot be installed in the first battery mounting section because it will encounter the second battery pack installed in the second battery mounting section.

[0077] In one or more embodiments, the battery pack can be installed in the battery mounting section by inserting it into the battery mounting section from above.

[0078] In the above configuration, the user of the lifting device can smoothly install the battery pack in the battery mounting section.

[0079] In one or more embodiments, the lifting device includes an operating device disposed in the housing and sending the operating signal of the drive motor to the controller.

[0080] In the above configuration, the operating device is also concentrated in the housing, thus preventing the lifting device from becoming too large. Furthermore, since the operating device is positioned near the controller, the possibility of the cable connecting the operating device and the controller becoming too long can be prevented.

[0081] In one or more embodiments, the operating device includes a button, which may be disposed on the upper surface of the housing.

[0082] In the above configuration, the user of the lifting device can operate the buttons smoothly.

[0083] In one or more embodiments, the buttons may include a raise button for raising the lifting component and a lower button for lowering the lifting component.

[0084] In the above configuration, the user of the lifting device raises and lowers the lifting component by operating the up button and the down button.

[0085] In one or more embodiments, the transmission mechanism may include: a rotating body that rotates by a motor, a lifting pulley rotatably supported on the lifting component, and a cable connecting the rotating body and the lifting pulley. The lifting component can lift and lower by winding and unwinding the cable around the rotating body.

[0086] In the above configuration, the transmission mechanism can properly transmit the power of the motor to the lifting components.

[0087] In one or more embodiments, the transmission mechanism may have a column pulley that is rotatably supported on the upper end of the column. A cable can connect the rotating body to the lifting pulley while it is suspended from the column pulley.

[0088] In the above configuration, the transmission mechanism can properly transmit the power of the motor to the lifting components.

[0089] In one or more embodiments, the lifting device may include a lamp unit disposed at the upper end of the column to illuminate the front of the lifting component.

[0090] In the above configuration, the user of the lifting device can operate the lifting device properly even in the dark, for example.

[0091] In one or more embodiments, the lifting device may include a movable frame connected to the lower end of the column and supporting wheels.

[0092] In the above configuration, the user of the lifting device can move the lifting device smoothly.

[0093] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto. The constituent elements of the embodiments described below can be appropriately combined. In addition, some constituent elements may not be used. In the embodiments, terms such as "front," "rear," "left," "right," "up," and "down" are used to describe the positional relationships of each part. These terms indicate the relative position or direction with respect to the center of the lifting device 1.

[0094] <First Embodiment>

[0095] [Overview of the lifting device]

[0096] Figure 1 This is a perspective view of the lifting device 1 as shown in the embodiment from the front. Figure 2 This is a perspective view of the lifting device 1 as shown in the embodiment, viewed from the rear. Figure 3 This is a front view showing the lifting device 1 of the embodiment. Figure 4 This is a rear view showing the lifting device 1 according to the embodiment. Figure 5 This is a top view showing the lifting device 1 of the embodiment. Figure 6 This is a bottom view of the lifting device 1 in the embodiment. Figure 7 This is a right view showing the lifting device 1 of the embodiment. Figure 8 This is a left view of the lifting device 1 according to the embodiment. Figure 9 This is a perspective view taken from the rear, showing a portion of the lifting device 1 according to the embodiment. Figure 10 This is a cross-sectional view showing a portion of the elevator device 1 in the embodiment, equivalent to... Figure 9 The AA line section is shown in the view.

[0097] The lifting device 1 is used for transporting and lifting the object S. The lifting device 1 includes: a moving frame 2, wheels 3, casters 4 (small wheels), a protective part 5, a column 6, a handle 7, a lifting component 8, a motor 9, a controller 10, a transmission mechanism 11, a housing 12, a battery mounting part 13, a lamp unit 14, an operating device 15, a display device 16, a stop braking mechanism 17, and a locking mechanism 18.

[0098] The movable frame 2 supports the upright 6. The movable frame 2 includes a main frame 19, a sub-frame 20, a pair of main boards 21, and a pair of sub-boards 22.

[0099] The main frame 19 has a rear frame 19B, a left frame 19L, and a right frame 19R. The rear frame 19B extends in the left-right direction. The left frame 19L and the right frame 19R extend in the front-back direction, respectively. The rear frame 19B is configured to connect the rear end of the left frame 19L to the rear end of the right frame 19R. The main frame 19 is constructed of hollow components (tubes) and is made of ferrous metals.

[0100] Subframe 20 is positioned closer to the front than rear frame 19B. Subframe 20 is configured to connect the rear of left frame 19L to the rear of right frame 19R. Subframe 20 extends in the left-right direction. Subframe 20 is constructed of hollow components (tubes) and is made of ferrous metal.

[0101] The main board 21 is supported from below by the rear frame 19B and the sub-frame 20. A pair of main boards 21 are provided. The pair of main boards 21 are arranged in a left-right direction. The main boards 21 include a left main board 21L and a right main board 21R. The main boards 21 are connected to the lower part of the column 6 by bolts 23.

[0102] Sub-board 22 is supported on rear frame 19B. A pair of sub-boards 22 are provided. The pair of sub-boards 22 are arranged in a left-right direction. The sub-board 22 includes a left sub-board 22L and a right sub-board 22R. A main board 21L and a main board 21R are arranged between sub-boards 22L and 22R. Sub-board 22L is arranged to the left of the main board 21L. Sub-board 22R is arranged to the right of the main board 21R.

[0103] Wheels 3 are supported at the rear of the movable frame 2. A pair of wheels 3 are arranged in the left-right direction. Wheels 3 include a left wheel 3L and a right wheel 3R. Wheels 3L and 3R are respectively connected to axle 24. Axle 24 connects the left wheel 3L and the right wheel 3R. Axle 24 is supported on the main plate 21 and the sub-plate 22. Wheels 3 are supported on the movable frame 2 via axle 24. Axle 24 extends in the left-right direction. Wheels 3 are rotatably connected to axle 24. The axis of rotation of wheel 3 extends in the left-right direction. The axis parallel to the axis of rotation of wheel 3 is aligned with the left-right direction. A bearing is arranged between wheel 3 and axle 24.

[0104] Small casters 4 are supported at the front of the movable frame 2. A pair of small casters 4 are arranged in the left-right direction. The small casters 4 include a left small caster 4L and a right small caster 4R. The left small caster 4L is supported at the front end of the left frame 19L. The right small caster 4R is supported at the front end of the right frame 19R. The small casters 4 are covered by a cover 25. The cover 25 includes a left-side cover 25L that covers the left small caster 4L from above and a cover 25R that covers the right small caster 4R from above. The cover 25L is located at the front end of the left frame 19L. The cover 25R is located at the front end of the right frame 19R.

[0105] The protective part 5 is fixed to the sub-plate 22. A pair of protective parts 5 are arranged in the left-right direction. The protective part 5 includes a left protective part 5L and a right protective part 5R. The front part of the left protective part 5L is fixed to the left sub-plate 22L by bolts 26. The rear part of the left protective part 5L is positioned behind the left wheel 3L. The front part of the right protective part 5R is fixed to the right sub-plate 22R by bolts 26. The rear part of the right protective part 5R is positioned behind the right wheel 3R. Both the protective parts 5L and 5R are bent into an L-shape. The rear part of the protective part 5L bends to the left. The rear part of the protective part 5R bends to the right. When the lifting device 1 is to tilt backward, the rear part of the protective part 5 contacts the ground. By having the rear part of the protective part 5 contact the ground, tilting the lifting device 1 backward can be prevented. Furthermore, the protective part 5 can prevent the user of the lifting device 1 from contacting the wheel 3.

[0106] The column 6 is supported by the movable frame 2. The column 6 is supported by the movable frame 2 via the main plate 21 (21L, 21R). More specifically, the movable frame 2 supports the main plate 21 (21L, 21R), and the main plate 21 (21L, 21R) supports the column 6. The column 6 extends vertically. The movable frame 2 is connected to the lower end of the column 6. The column 6 is configured to extend upwards from the movable frame. The column 6 is rotatably connected to the movable frame 2. The column 6 can rotate to tilt forward. The column 6 is made of aluminum. The column 6 is a hollow component. The column 6 is constructed from a drawn aluminum part, making it lightweight.

[0107] The handle 7 is for the user of the lifting device 1 to hold. The handle 7 is fixed to the rear of the column 6. The handle 7 is fixed to the upper part of the column 6 by means of a pair of brackets 27. The brackets 27 are fixed to the column 6 by screws 28. A plurality of screw holes 29 are provided at the rear of the column 6. The plurality of screw holes 29 are arranged in the vertical direction. The height of the handle 7 is adjusted by selecting the screw hole 29 into which the screws 28 are inserted.

[0108] The lifting component 8 is guided by the column 6 while it is raised and lowered. The lifting component 8 has: a slider 30 guided by the column 6, an arm 31 connected to the slider 30, a platform 32 supported on the arm 31, and a back plate 33 fixed to the upper part of the slider 30.

[0109] A guide groove 34 is formed in the column 6. The guide groove 34 includes a guide groove 34L formed on the left surface of the column 6 and a guide groove 34R formed on the right surface of the column 6. A guide opening 35 is formed on the front surface of the column 6. The guide groove 34 and the guide opening 35 extend vertically. The left portion 30L of the slider 30 is opposite to the left guide groove 34L. The right portion 30R of the slider 30 is opposite to the right guide groove 34R. The front portion of the slider 30 is opposite to the guide opening 35. At least one part of the slider 30 is disposed inside the guide opening 35. The slider 30 rotatably supports a roller 36. The roller 36 includes a roller 36L disposed in the left guide groove 34L and a roller 36R disposed in the right guide groove 34R. The roller 36 is capable of rolling in the guide groove 34. By rolling the roller 36 in the guide groove 34, the slider 30 can move smoothly in the vertical direction while being guided by the column 6. The guide groove 34 and the guide opening 35 are formed by drawing aluminum.

[0110] Arm 31 is configured to extend forward from slider 30. A pair of arms 31 are configured in the left-right direction. Arm 31 includes a left arm 31L and a right arm 31R. The rear portion of the left arm 31L is bolted to the left portion 30L of slider 30. The rear portion of the right arm 31R is bolted to the right portion 30R of slider 30. Arm 31 is rotatably connected to slider 30.

[0111] The platform 32 supports the transported object S from below. The transported object S is placed on the platform 32. The platform 32 is supported from the left and right directions by arms 31L and 31R. The platform 32 is positioned closer to the front than the column 6. The platform 32 is connected to the slider 30 via arms 31. The platform 32 is rotatably connected to the slider 30. When the arms 31 rotate relative to the slider 30, the platform 32 rotates together with the arms 31.

[0112] The back plate 33 supports the transported object S from the rear. The back plate 33 is fixed to the upper part of the front surface of the slider 30.

[0113] At least a portion of the lifting component 8 is raised or lowered on the front side of the column 6. At least the front part of the slider 30, the front part of the arm 31, the platform 32, and the back plate 33 are positioned closer to the front of the column 6 and are raised or lowered on the front side of the column 6.

[0114] Motor 9 generates the power to raise and lower the lifting component 8. Motor 9 is an electric motor. Motor 9 is a brushless motor.

[0115] The controller 10 controls the electronic equipment mounted on the lifting device 1. The controller 10 controls at least the motor 9.

[0116] The transmission mechanism 11 transmits the rotational force of the motor 9 to the lifting component 8.

[0117] The housing 12 houses the motor 9 and the controller 10. The housing 12 is made of synthetic resin. The housing 12 houses at least a portion of the transmission mechanism 11. The housing 12 is fixed to at least a portion of the column 6. In this embodiment, the housing 12 is fixed to the rear surface of the column 6 by screws 38. In the vertical direction, the housing 12 is fixed to the central portion of the column 6.

[0118] A battery pack 39 is installed in the battery mounting section 13. The battery pack 39 supplies power to the electronic equipment mounted on the lifting device 1 while installed in the battery mounting section 13. The battery pack 39 supplies power to at least the motor 9. The battery pack 39 can be installed and removed from the battery mounting section 13. The battery pack 39 is a battery pack for power tools. The battery pack 39 is charged while removed from the battery mounting section 13.

[0119] A battery mounting portion 13 is provided on the housing 12. The battery mounting portion 13 is provided on the outer surface of the housing 12. In this embodiment, the battery mounting portion 13 is provided on the right side of the housing 12.

[0120] The lamp unit 14 emits illumination light to the area in front of the lifting component 8. Furthermore, the lamp unit 14 can also illuminate different areas in front of the lifting component 8. The lamp unit 14 is located at the upper end of the column 6.

[0121] The operating device 15 generates an operation signal to drive the motor 9 upon operation by the user of the lifting device 1. The operating device 15 sends the generated operation signal to the controller 10. The operating device 15 is disposed in the housing 12.

[0122] The operating device 15 includes multiple buttons. The buttons are located on the upper surface of the housing 12. The upper surface of the housing 12, where the operating device 15 is located, faces rearward and slopes downward. This makes it easy for the user to operate the operating device 15. In this embodiment, the buttons include: a power on / off button 15A, a raise button 15B for raising the lifting member 8, a lower button 15C for lowering the lifting member 8, and a lighting button 15D for starting or stopping the lamp unit 14.

[0123] The display device 16 includes: a power display 16A that illuminates when the power is on and turns off when the power is off; and a remaining amount display 16B that displays the remaining amount of the battery pack 39. The remaining amount display 16B includes an indicator with multiple light-emitting parts. The more remaining amount, the more light-emitting parts are illuminated, and the less remaining amount, the fewer light-emitting parts are illuminated.

[0124] The stop braking mechanism 17 suppresses the rotation of the wheel 3. The stop braking mechanism 17 includes: a braking member 40 disposed above the wheel 3; a brake handle 41 operated to move the braking member 40 in the vertical direction; a brake linkage 42 connecting the braking member 40 and the brake handle 41; and a brake support member 43 rotatably supporting the brake handle 41. The braking member 40 includes a braking member 40L disposed above the wheel 3L and a braking member 40R disposed above the wheel 3R.

[0125] The locking mechanism 18 locks the rotation of the column 6. The column 6 can rotate in a manner that allows it to tilt forward relative to the movable frame 2. The locking mechanism 18 locks the column 6 so that it does not tilt forward.

[0126] [Battery Installation Section]

[0127] Figure 11 This is a perspective view taken from the rear, showing a portion of the lifting device 1 according to the embodiment. (As shown) Figure 9 as well as Figure 11 As shown, in this embodiment, the battery mounting portion 13 includes a first battery mounting portion 13A and a second battery mounting portion 13B. The second battery mounting portion 13B is disposed next to the first battery mounting portion 13A. In this embodiment, the first battery mounting portion 13A and the second battery mounting portion 13B are disposed along the front-rear direction on the outer surface of the right side of the housing 12. The second battery mounting portion 13B is disposed at a position closer to the rear than the first battery mounting portion 13A.

[0128] The battery pack 39 includes a first battery pack 39A installed in the first battery mounting section 13A and a second battery pack 39B installed in the second battery mounting section 13B. The first battery pack 39A with a first rated voltage is installed in the first battery mounting section 13A. The second battery pack 39B with a second rated voltage is installed in the second battery mounting section 13B. As an example, the first rated voltage of the first battery pack 39A is 36V, and the second rated voltage of the second battery pack 39B is 18V.

[0129] The housing 12 supports a cover component 44, which covers either the first battery mounting portion 13A or the second battery mounting portion 13B. The cover component 44 covers the second battery mounting portion 13B when the first battery pack 39A is installed in the first battery mounting portion 13A, and covers the first battery mounting portion 13A when the second battery pack 39B is installed in the second battery mounting portion 13B. The cover component 44 is slidably supported on the housing 12. A guide groove 12G is formed on the right side of the housing 12, which guides the cover component 44 in the front-rear direction. The guide groove 12G extends in the front-rear direction. The cover component 44 slides in the front-rear direction while being guided along the guide groove 12G. The user of the lifting device 1 can move the cover component 44 in the front-rear direction by grasping the protrusion 44A provided on the cover component 44 with their fingers.

[0130] like Figure 9 As shown, the second battery mounting portion 13B is covered by the cover component 44 as it slides rearward, exposing the first battery mounting portion 13A. The first battery pack 39A is installed in the first battery mounting portion 13A by being inserted from above into the first battery mounting portion 13A.

[0131] like Figure 11 As shown, the first battery mounting portion 13A is covered by the cover component 44 as it slides forward, exposing the second battery mounting portion 13B. The second battery pack 39B is installed in the second battery mounting portion 13B by being inserted from above into the second battery mounting portion 13B.

[0132] Furthermore, in this embodiment, the relative positions of the first battery mounting portion 13A and the second battery mounting portion 13B are determined such that when the first battery pack 39A is installed in the first battery mounting portion 13A, the second battery pack 39B cannot be installed in the second battery mounting portion 13B, and when the second battery pack 39B is installed in the second battery mounting portion 13B, the first battery pack 39A cannot be installed in the first battery mounting portion 13A. Therefore, for example, even without the cover member 44, it is possible to prevent the simultaneous installation of two battery packs 39.

[0133] Furthermore, protective sections 45 are provided at the front and rear of the battery mounting section 13. The protective sections 45 are provided so as to protrude to the right from the outer surface of the right side of the housing 12. The protective sections 45 can prevent objects around the lifting device 1 from contacting the battery pack 39 or the battery mounting section 13.

[0134] [Stop Brake Mechanism]

[0135] Figure 12 This is a perspective view of the stop braking mechanism 17 as shown in the embodiment, viewed from the rear. Figure 13 This is a cross-sectional view showing the stop braking mechanism 17 of the embodiment.

[0136] The stop braking mechanism 17 includes: a braking component 40 disposed above the wheel 3; a brake handle 41 operated to move the braking component 40; a brake linkage 42 connecting the braking component 40 and the brake handle 41; and a brake support component 43 supporting the brake handle 41 in a rotatable manner.

[0137] The brake handle 41 has a cam portion 41A that is rotatably supported on the brake support member 43 by means of a drive shaft 46, and a handle portion 41B.

[0138] The upper end of the brake link 42 is connected to the cam portion 41A via a pivot 47.

[0139] Brake support member 43 is fixed to the rear surface of column 6. Brake support member 43 has: a left plate portion 43L disposed on the left side of cam portion 41A, a right plate portion 43R disposed on the right side of cam portion 41A, and an upper plate portion 43U disposed such that the upper end of left plate portion 43L and the upper end of right plate portion 43R are connected. The left end of drive shaft 46 is supported on left plate portion 43L, and the right end of drive shaft 46 is supported on right plate portion 43R.

[0140] The user of the lifting device 1 can rotate the cam 41A by holding the handle 41B. Figure 12 as well as Figure 13As shown, when the cam portion 41A rotates upward by moving the handle portion 41B upward, the brake linkage 42 descends. If the brake linkage 42 descends, the brake component 40 descends, the brake component 40L contacts the wheel 3L and presses the wheel 3L from above, and the brake component 40R contacts the wheel 3R and presses the wheel 3R from above. This suppresses the rotation of the wheel 3, and the parking brake is activated. Furthermore, when the parking brake is activated, the cam surface 41C of the cam portion 41A contacts the upper plate portion 43U of the brake support component 43, thus preventing accidental rotation of the cam portion 41A when the parking brake is activated.

[0141] like Figure 2 As shown, when the cam portion 41A rotates downwards by moving the handle portion 41B, the brake linkage 42 rises. If the brake linkage 42 rises, the brake component 40 rises and separates from the wheel 3. Thus, the brake is released. Furthermore, as... Figure 13 As shown, a torsion spring 106 is arranged around the drive shaft 46. The torsion spring 106 generates a spring force to move the handle portion 41B downward. In the state where the brake is released, the torsion spring 106 generates a spring force to move the handle portion 41B downward, thus preventing accidental rotation of the cam portion 41A in the state where the brake is released.

[0142] like Figure 13 As shown, a screw portion 42A is provided at the lower part of the brake link 42. Nuts 42B and 42C are arranged around the screw portion 42A. The brake component 40 is fixed to the brake link 42 by means of nuts 42B and 42C. By rotating nuts 42B and 42C, the brake component 40 can move relative to the brake link 42 in the vertical direction. This adjusts the initial position of the brake component 40. By adjusting the initial position of the brake component 40, the operation of the brake in the stop brake mechanism 17 is adjusted.

[0143] Furthermore, a protective portion 48 is disposed between the braking member 40 and the braking support member 43 in the vertical direction. The protective portion 48 is fixed to the rear surface of the column 6. Recesses 48A are formed in the left and right plates of the protective portion 48, respectively. In the brake-released state, at least a portion of the braking member 40 is disposed inside the recesses 48A. In addition, an opening 48B is formed in the upper plate of the protective portion 48, and at least a portion of the brake linkage 42 is disposed in the opening 48B.

[0144] [Transfer Mechanism]

[0145] Figure 14 This is a cross-sectional view showing a portion of the lifting device 1 in the embodiment, equivalent to... Figure 2 BB line section view. Figure 15This is a perspective view of the slider 30 as shown in the embodiment, viewed from the rear. Figure 16 This is a perspective view of the upper part of the column 6 in the embodiment, viewed from above. Figure 17 This is a cross-sectional view showing a portion of the lifting device 1 in the embodiment, equivalent to... Figure 16 CC line section view. Figure 18 This is a schematic front view of the transmission mechanism 11 in an embodiment.

[0146] The transmission mechanism 11 includes: a rotating body 49 that rotates via a motor 9; a lifting pulley 50 rotatably supported on the lifting component 8; a column pulley 51 rotatably fixed to the upper end of the column 6; and a cable 52 suspended between the lifting pulley 50 and the column pulley 51. The cable 52 is movable in the vertical direction. One end of the cable 52 is fixed to a fixing component located at the upper end of the column 6. The other end of the cable 52 is fixed to the rotating body 49.

[0147] like Figure 10 As shown, the rotating body 49 is disposed in the internal space of the column 6. The rotating body 49 is rotatably supported on the column 6.

[0148] The lifting pulley 50 is supported on a drive shaft assembly 53, which is fixed to the slider 30. The drive shaft assembly 53 is arranged to protrude rearward from the front of the slider 30. At least a portion of the drive shaft assembly 53 is disposed in the guide opening 35 of the column 6. The rear end of the drive shaft assembly 53 is disposed in the interior space of the column 6. The lifting pulley 50 is supported on the slider 30 by means of the drive shaft assembly 53. A bearing 54 is disposed around the drive shaft assembly 53. The lifting pulley 50 is rotatably supported on the drive shaft assembly 53 by means of the bearing 54. The lifting pulley 50 is disposed in the interior space of the column 6. The lifting pulley 50 rotates within the interior space of the column 6. In addition, the lifting pulley 50 moves up and down within the interior space of the column 6.

[0149] The column pulley 51 is supported by a drive shaft assembly 55, which is located at the upper end of the column 6. The drive shaft assembly 55 is supported by a bracket 56. The bracket 56 is fixed to a support plate 57, which is also fixed to the upper end of the column 6. The column pulley 51 is supported at the upper end of the column 6 by means of the drive shaft assembly 55, the bracket 56, and the support plate 57. Bearings 58 are arranged around the drive shaft assembly 55. The column pulley 51 is rotatably supported on the drive shaft assembly 55 by means of the bearings 58.

[0150] like Figure 1 As shown, a cover 59 is provided at the upper end of the column 6. The cover 59 is installed at the upper end of the column 6 in such a way as to cover the column pulley 51. Figure 16The upper part of the column 6 indicates the state where the cover 59 has been removed.

[0151] like Figure 18 As shown, one end of cable 52 is fixed to a fixing component, which is located at the upper end of column 6. The other end of cable 52 is fixed to rotating body 49. A first intermediate portion of cable 52 near one end is hung on lifting pulley 50. A second intermediate portion of cable 52 between the first and other ends is hung on column pulley 51. In this embodiment, the lifting component 8 moves up and down by winding and unwinding cable 52 via rotating body 49.

[0152] Figure 19 This is a perspective view of the lifting device 1 as shown in the embodiment. When the motor 9 rotates in one direction and the rotating body 49 rotates in one direction, the rotating body 49 winds the cable 52. The lifting pulley 50 rises as the rotating body 49 rotates by winding the cable 52. The rising of the lifting pulley 50... Figure 19 As shown, the lifting component 8 connected to the lifting pulley 50 rises.

[0153] When motor 9 rotates in the opposite direction and rotating body 49 rotates in the opposite direction, rotating body 49 releases cable 52. As rotating body 49 rotates by releasing cable 52, lifting pulley 50 descends. As lifting pulley 50 descends, ... Figure 1 As shown, the lifting component 8 connected to the lifting pulley 50 descends.

[0154] [Extreme Sensor]

[0155] Figure 20 This is a cross-sectional view of the upper part of the column 6 in the embodiment. Figure 21 This is a cross-sectional view showing the lower part of column 6 in the embodiment. (e.g.) Figure 20 as well as Figure 21 As shown, the slider 30 has an upper contact member 30T and a lower contact member 30B. The upper contact member 30T and the lower contact member 30B are respectively disposed inside the guide opening 35 of the column 6. When the slider 30 is raised or lowered, the upper contact member 30T and the lower contact member 30B rise and fall together with the slider 30 inside the guide opening 35.

[0156] In this embodiment, the lifting device 1 has an upper limit sensor 60 and a lower limit sensor 61.

[0157] The upper limit sensor 60 is disposed at the upper end of the column 6. The upper limit sensor 60 has a contact element 60A, which is disposed at a position that can contact the upper contact member 30T. The upper limit sensor 60, including the contact element 60A, is disposed on the left and right sides of the upper contact member 30T.

[0158] The lower limit sensor 61 is disposed at the lower end of the column 6. The lower limit sensor 61 has a contact 61A, which is disposed at a position that can contact the lower contact member 30B. The lower limit sensor 61, including the contact 61A, is disposed on the left and right sides of the lower contact member 30B, respectively.

[0159] When the lifting component 8 rises, the upper contact component 30T of the slider 30 contacts the contact element 60A of the upper limit sensor 60. The upper limit sensor 60 sends a detection signal to the controller 10 indicating that the upper contact component 30T is in contact with the contact element 60A. The controller 10 stops the motor 9 based on the detection signal from the upper limit sensor 60. Even if the rise button 15B is activated, the controller 10 stops the motor 9 upon receiving the detection signal indicating that the upper contact component 30T is in contact with the contact element 60A.

[0160] When the lifting component 8 descends, the lower contact component 30B of the slider 30 contacts the contact element 61A of the lower limit sensor 61. The lower limit sensor 61 sends a detection signal to the controller 10 indicating that the lower contact component 30B is in contact with the contact element 61A. The controller 10 stops the motor 9 based on the detection signal from the lower limit sensor 61. Even if the descent button 15C is activated, the controller 10 stops the motor 9 upon receiving the detection signal indicating that the lower contact component 30B is in contact with the contact element 61A.

[0161] [Lamp Unit]

[0162] Figure 22 This is a cross-sectional view of the upper part of the column 6 in the embodiment. Figure 23 This is a front view of the upper part of the column 6 in the embodiment.

[0163] The lamp unit 14 emits illumination light to illuminate the front of the lifting member 8. The lamp unit 14 is disposed at the upper end of the column 6. The lamp unit 14 has a light emitter 62 and a light-transmitting member 63. The light emitter 62 includes a light-emitting element 62A and a circuit board 62B on which the light-emitting element 62A is mounted. An example of the light-emitting element 62A is a light-emitting diode. The light-transmitting member 63 is disposed in front of the light emitter 62. The light-transmitting member 63 can be a transparent cover without a lens function or a lens. The light-transmitting member 63 can be formed of a light-diffusing resin. The illumination light emitted from the light-emitting element 62A shines in front of the lamp unit 14 through the light-transmitting member 63.

[0164] [Speed ​​reduction mechanism]

[0165] Figure 24 This is a cross-sectional view showing a portion of the transmission mechanism 11 in the embodiment, equivalent to Figure 9 The DD line section is shown in the view.

[0166] like Figure 24 As shown, housing 12 houses motor 9 and part of transmission mechanism 11. Transmission mechanism 11 includes: a rotating body 49, a main shaft 64 connected to the rotating body 49, and a reduction mechanism 65 that transmits the rotation of motor 9 to main shaft 64.

[0167] The reduction mechanism 65 is housed in the gearbox 67. The motor 9, the reduction mechanism 65, and the gearbox 67 are housed in the housing 12. The motor 9, the bearing housing 66, and the gearbox 67 are fixed together by screws 68. The gearbox 67 is fixed to the rear of the column 6.

[0168] At least a portion of the main shaft 64 is housed in the housing 12. A gearbox 67 is disposed between the main shaft 64 and the housing 12. The rotating body 49 is housed within the interior space of the column 6. An opening 69 is formed at the rear of the column 6. The opening 69 connects the interior space of the column 6 to the exterior space. The main shaft 64 is connected to the rotating body 49 via the opening 69.

[0169] Motor 9 is an internal rotor type brushless motor. Motor 9 has a stator 70 and a rotor 71. The rotor 71 is located inside the stator 70.

[0170] The rotor 71 has a rotor core 72 and a rotor drive shaft 73. The rotor core 72 is disposed around the rotor drive shaft 73. The rotor drive shaft 73 is fixed to the rotor core 72. The rear portion of the rotor drive shaft 73 is rotatably supported by a bearing 74. The front portion of the rotor drive shaft 73 is rotatably supported by a bearing 75. The bearing 74 is supported by a bearing housing 66. The bearing 75 is supported by a gearbox 67.

[0171] The fan 76 is fixed to the rear end of the rotor drive shaft 73. The fan 76 rotates together with the rotor drive shaft 73. The rotation of the fan 76 generates airflow for cooling the motor 9. The upper part of the fan 76 is covered by a fan cover 77. An air intake 12A and an exhaust 12B are provided at the lower part of the housing 12. The air intake 12A is located closer to the front than the exhaust 12B. When the fan 76 rotates, the air around the housing 12 flows into the internal space of the housing 12 through the air intake 12A. The air flowing into the internal space of the housing 12 contacts the stator 70 and rotor 71 of the motor 9 to cool them, and after passing through the fan 76, it is discharged from the internal space of the housing 12 to the external space through the exhaust 12B.

[0172] The input gear 78 is located at the front end of the rotor drive shaft 73. The reduction mechanism 65 is connected to the rotor drive shaft 73 of the motor 9. The reduction mechanism 65 reduces the rotation of the rotor drive shaft 73, causing the main shaft 64 to rotate at a lower rotational speed than the rotor drive shaft 73. The rotating body 49 rotates as the main shaft 64 rotates.

[0173] The main shaft 64 is rotatably supported by bearing 79. Bearing 79 is supported by gearbox 67. Rotating body 49 is rotatably supported by bearings 80 and 81. Bearing 80 is supported by column 6 via bushing 82. Bushing 82 is disposed in opening 69. Bearing 81 is supported by column 6.

[0174] Figure 25 This is a cross-sectional view showing a portion of the deceleration mechanism 65 in the embodiment. Figure 26 This is a cross-sectional view showing a portion of the deceleration mechanism 65 in the embodiment. Figure 27 This is a cross-sectional view showing a portion of the deceleration mechanism 65 in the embodiment.

[0175] In one embodiment, the reduction mechanism 65 includes: a first intermediate gear 83 meshing with an input gear 78; a second intermediate gear 84 rotating together with the first intermediate gear 83; and an output gear 85 meshing with the second intermediate gear 84. The second intermediate gear 84 is rotatably supported on a bearing 86 and a sliding bearing 107.

[0176] The input gear 78 has fewer teeth than the first intermediate gear 83. The second intermediate gear 84 has fewer teeth than the output gear 85.

[0177] When motor 9 starts and rotor drive shaft 73 rotates, input gear 78 rotates. When input gear 78 rotates, first intermediate gear 83 rotates. When first intermediate gear 83 rotates, second intermediate gear 84 rotates. When second intermediate gear 84 rotates, output gear 85 rotates.

[0178] The output gear 85 is positioned around the main shaft 64. The output gear 85 is rotated by the motor 9 via the input gear 78, the first intermediate gear 83, and the second intermediate gear 84.

[0179] The output gear 85 is fixed to the main shaft 64. When the motor 9 causes the output gear 85 to rotate, the main shaft 64 rotates together with the output gear 85.

[0180] The front end of the spindle 64 is fixed to the rear end of the rotating body 49. When the spindle 64 rotates, the rotating body 49 rotates together with the spindle 64.

[0181] Thus, when the rotational force of the rotor drive shaft 73 is transmitted to the main shaft 64 via the reduction mechanism 65 and the main shaft 64 rotates, the rotating body 49 rotates together with the main shaft 64.

[0182] The reduction mechanism 65 has a damping member 87 that dampens the descent of the lifting member 8 when no power is being transmitted from the motor 9 to the lifting member 8. The damping member 87 includes a one-way bearing that is locked when no power is being transmitted. In the following description, the damping member 87 will be appropriately referred to as the one-way bearing 87.

[0183] In one embodiment, the reduction mechanism 65 includes a one-way bearing 87, a nut 88, and a sleeve 89.

[0184] Nut 88 is disposed around spindle 64. Nut 88 is positioned closer to the rear than output gear 85. Nut 88 has a cylindrical portion 88A and a flange portion 88B. Threaded teeth 64A are provided on the outer periphery of spindle 64. Nut 88 has a threaded groove 88C that engages with the threaded teeth 64A of spindle 64.

[0185] The nut 88 is supported on a pin 90, which is movable along the axial direction (i.e., the back-and-forth direction) of the main shaft 64. The pin 90 is located on the output gear 85. The pin 90 is fixed to a portion of the output gear 85. An opening is provided in the flange portion 88B of the nut 88 for the pin 90 to be positioned. The pin 90 guides the nut 88 in the back-and-forth direction. In addition, the output gear 85 is connected to the nut 88 via the pin 90, so the nut 88 rotates together with the output gear 85.

[0186] The sleeve 89 is positioned axially (i.e., in the longitudinal direction) of the main shaft 64, further away from the output gear 85 than the nut 88. That is, the sleeve 89 is positioned closer to the rear than the nut 88. The sleeve 89 is supported on the gearbox 67 by a one-way bearing 87. The sleeve 89 does not move in the longitudinal direction.

[0187] The sleeve 89 has: a cylindrical portion 89A disposed around the cylindrical portion 88A of the nut 88, and an annular portion 89B connected to the rear end of the cylindrical portion 89A.

[0188] Sleeve 89 is supported by one-way bearing 87. One-way bearing 87 is disposed around the cylindrical portion 89A of sleeve 89. One-way bearing 87 is supported by gearbox 67.

[0189] Figure 26This indicates that the power of the motor 9 is transmitted to the lifting member 8, causing the lifting member 8 to rise. The output gear 85 and the nut 88 are connected by a pin 90. When the output gear 85 rotates in one direction, the nut 88 also rotates in the same direction. When the output gear 85 and the nut 88 rotate in one direction, the nut 88 moves axially, causing the nut 88 to separate from the output gear 85 and contact the sleeve 89. That is, the nut 88 moves rearward by rotating around the main shaft 64 and under the action of the thread teeth 64A and the thread groove 88C. By moving the nut 88 rearward and contacting the sleeve 89, the main shaft 64, the output gear 85, the nut 88, and the sleeve 89 become a single unit. In this embodiment, the rear surface of the flange portion 88B of the nut 88 contacts the front end face of the cylindrical portion 89A of the sleeve 89. In addition, when the sleeve 89 rotates in the direction of rising of the lifting member 8, the one-way bearing 87 rotates freely. That is, when the motor 9 rotates, causing the lifting component 8 to rise, the nut 88 moves backward, causing the nut 88 to separate from the output gear 85 and contact the sleeve 89. With the one-way bearing 87 idling, the main shaft 64, output gear 85, nut 88, and sleeve 89 rotate as a whole. Through the rotation of the main shaft 64, the rotating body 49 rotates, causing the lifting component 8 to rise.

[0190] When motor 9 stops and does not cause output gear 85 to rotate, the force that rotates main shaft 64, nut 88, and sleeve 89 in the other direction comes into play, thus locking one-way bearing 87 and restricting rotation of main shaft 64. Therefore, when no power is transmitted from motor 9 to lifting component 8, the descent (falling) of lifting component 8 can be suppressed.

[0191] Figure 27 This indicates that the power of the motor 9 is transmitted to the lifting component 8, causing the lifting component 8 to descend. When the output gear 85 and the nut 88 rotate in the other direction, the nut 88 moves axially, causing the nut 88 to separate from the sleeve 89 and contact the output gear 85. That is, the nut 88 moves forward. By moving forward and contacting the output gear 85, the main shaft 64, the output gear 85, and the nut 88 become a single unit. In addition, the main shaft 64, the output gear 85, and the nut 88 are separate from the sleeve 89. Because the main shaft 64, the output gear 85, and the nut 88 are separate from the sleeve 89, the locking function of the one-way bearing 87 does not affect the rotation of the output gear 85 and the main shaft 64. That is, when the motor 9 rotates, causing the lifting component 8 to descend, the main shaft 64, the output gear 85, and the nut 88 rotate as a single unit in a state where the nut 88 moves forward, separating from the sleeve 89 and contacting the output gear 85 without being affected by the one-way bearing 87. The rotation of the main shaft 64 causes the rotating body 49 to rotate, which in turn causes the lifting component 8 to descend.

[0192] [Locking mechanism]

[0193] Next, refer to Figure 2 , Figure 4 , Figure 6 as well as Figure 28 The locking mechanism 18 will be explained in detail below. Figure 28 This is a perspective view of the locking mechanism 18 as shown in the embodiment, viewed from the rear.

[0194] The locking mechanism 18 locks the rotation of the column 6. The column 6 rotates in a forward tilting manner. The locking mechanism 18 locks the column 6 to prevent it from tilting forward.

[0195] The locking mechanism 18 includes a first locking mechanism 18A and a second locking mechanism 18B. That is, the locking mechanism 18 is a double locking structure. When both the first locking mechanism 18A and the second locking mechanism 18B are released, the column 6 rotates.

[0196] The movable frame 2 has a recess 91. The recess 91 is located closer to the rear than the column 6. In this embodiment, the recess 91 is located on the upper surface of the main board 21.

[0197] The first locking mechanism 18A has a locking rod 92, which is disposed in the recess 91 in a state supporting the column 6. The first locking mechanism 18A is locked by inserting the locking rod 92 into the recess 91.

[0198] In this embodiment, the first locking mechanism 18A includes: a support member 94 rotatably connected to the column 6 and supporting the locking rod 92, and a torsion spring 95 that generates a spring force by pressing the locking rod 92 against the recess 91. A pair of support members 94 are arranged in the left-right direction. A drive shaft 94A is provided to connect the pair of support members 94. The torsion spring 95 is disposed around the drive shaft 94A.

[0199] The second locking mechanism 18B has a locking pin 96. A bracket 99 is fixed to the rear surface of the column 6. The bracket 99 has a first opening 97 for the locking pin 96 to be disposed. The movable frame 2 has a second opening 98 for the locking pin 96 to be disposed. In this embodiment, the second opening 98 is located on the right-side main board 21. The first opening 97 and the second opening 98 are respectively located closer to the rear of the column 6. The second locking mechanism 18B is locked by the locking pin 96 disposed on the first opening 97 and the second opening 98 respectively.

[0200] In addition, the second locking mechanism 18B has a fixed cam 100 supported on the bracket 99 and a locking pin 102 having a rotating cam 101 fixed to the locking pin 96 and in contact with the fixed cam 100.

[0201] Additionally, the second locking mechanism 18B has a helical spring 103 supported on the bracket 99 and generates a spring force so that the locking pin 96 is inserted into the second opening 98.

[0202] The following is for reference Figures 28-34 The method for releasing the locking mechanism 18 is explained. Figure 29 This is a perspective view of the locking mechanism 18 as shown in the embodiment, viewed from the front. Figure 30 This is a perspective view of the locking mechanism 18 as shown in the embodiment, viewed from the front. Figure 31 This is a perspective view of the locking mechanism 18 as shown in the embodiment, viewed from the rear. Figure 32 This is a perspective view taken from the rear, showing a portion of the locking mechanism 18 of the embodiment. Figure 33 This is a perspective view taken from the rear, showing a portion of the locking mechanism 18 of the embodiment. Figure 34 This is a diagram of the lifting device 1 showing the state in which the locking mechanism 18 of the embodiment is released.

[0203] The method for releasing the locking of the first locking mechanism 18A will be described. To release the locking of the first locking mechanism 18A, the locking lever 92 is pulled out from the recess 91. Figure 28 As shown, the lifting component 8 has a hook component 104, which is rotatably connected to the right arm 31L. In this embodiment, the hook component 104 is used to perform the process of pulling the locking lever 92 out of the recess 91. Figure 28 As shown, the height of the lifting component 8 can be adjusted in such a way that the hook component 104 can be hooked onto the locking bar 92.

[0204] Next, as Figure 29 As shown, the arm 31 is rotated rearward so that the hook component 104 can be hooked onto the locking bar 92. Thus, the user of the lifting device 1 can hook the hook component 104 onto the locking bar 92.

[0205] Next, as Figure 30 , Figure 31 as well as Figure 32 As shown, with the hook component 104 engaged with the locking lever 92, the arm 31 rotates forward. The user of the lifting device 1 rotates the arm 31 forward against the spring force of the torsion spring 95. By rotating the arm 31 forward, the locking lever 92 is pulled out of the recess 91.

[0206] The locking mechanism 18A is released by pulling the locking lever 92 out of the recess 91 using the hook component 104. The hook component 104 has the function of releasing the locking mechanism 18A.

[0207] Next, the method for releasing the locking of the second locking mechanism 18B will be described. To release the locking of the second locking mechanism 18B, the locking pin 96 is pulled out from the second opening 98. For example... Figure 33 As shown, in order to pull out the locking pin 96 from the second opening 98, the user rotates the locking pin lever 102 downwards. As the locking pin lever 102 rotates downwards, the engagement state of the fixed cam 100 and the rotating cam 101 changes, causing the rotating cam 101 and the locking pin lever 102 to move to the left. By moving the rotating cam 101 and the locking pin lever 102 to the left, the locking pin 96 is guided to the left by the first opening 97. The locking pin 96 is thus pulled out from the second opening 98 by moving to the left.

[0208] The second locking mechanism 18B has a coil spring 103 that generates a spring force to insert the locking pin 96 into the second opening 98. The user of the lifting device 1 rotates the locking pin lever 102 downward against the spring force of the coil spring 103. By rotating the locking pin lever 102 downward, the locking pin 96 is pulled out from the recess 91.

[0209] The locking of the second locking mechanism 18B is released by pulling the locking pin 96 out of the second opening 98.

[0210] By releasing the locking mechanisms 18A and 18B, as follows: Figure 34 As shown, the user of the lifting device 1 can rotate the column 6 forward. That is, the user of the lifting device 1 can rotate the column 6 by bringing it close to the main frame 19.

[0211] In this embodiment, the main board 21 on the right side of the movable frame 2 has a third opening 105. After the column 6 is rotated in a forward tilting manner, the locking pin 96 is inserted into the third opening 105 by the elastic force of the coil spring 103.

[0212] The base end of the hook component 104 is connected to the arm 31L of the lifting component 8. The front end of the hook component 104 is attached to the locking rod 92. The locking rod 92 is connected to the column 6 via the support component 94. Therefore, as Figure 34 As shown, when the column 6 is rotated in a forward tilting manner, the hook component 104 can prevent the lifting component 8 from moving forward.

[0213] [How to use]

[0214] like Figure 6As shown, the object to be transported, S, is placed on the platform 32. In this embodiment, the platform 32 has a front-to-back dimension of 400 mm and a left-to-right dimension of 480 mm. The maximum load capacity of the lifting member 8 is 50 kg or more and 150 kg or less, preferably 70 kg or more and 120 kg or less. Based on the height of the ground in contact with the wheel 3, the lifting range of the lifting member 8 is 5 mm or more and 1500 mm or less, preferably 10 mm or more and 1200 mm or less. Furthermore, the outer diameter of the wheel 3 is 255 mm, and the outer diameter of the caster 4 is 50 mm.

[0215] Furthermore, in the embodiment, the rated voltage of the battery pack 39 is 14.4V or higher and 120V or lower, preferably 18V or higher and 54V or lower, and more preferably 18V or higher and 36V or lower. A battery pack with a rated voltage of 18V is referred to as a 20Vmax battery pack, a battery pack with a rated voltage of 36V is referred to as a 40Vmax battery pack, and a battery pack with a rated voltage of 54V is referred to as a 60Vmax battery pack.

[0216] The outer diameter of the stator 70 of the motor 9 is 35 mm or more and 100 mm or less, preferably 38 mm or more and 70 mm or less, and more preferably 44 mm or more and 60 mm or less.

[0217] The user of the lifting device 1 can move the lifting device 1 by pushing or pulling it while holding the handle 7.

[0218] When the object S is placed on, for example, a transport vehicle, the user of the lifting device 1 operates the lift button 15B to raise the lifting component 8. Figure 19 As shown, the lifting component 8 rises by operating the up button 15B. In this embodiment, the time required for the lifting component 8 to rise from the lower position to the upper position within its movable range is 12 seconds to 14 seconds. Furthermore, the height from the ground to the lifting component 8 when it is positioned at the lower position is 100 mm. The height from the ground to the lifting component 8 when it is positioned at the upper position is 1050 mm.

[0219] like Figure 34 As shown, the lifting device 1 is foldable. Therefore, the storage space of the lifting device 1 can be reduced.

[0220] [Effect]

[0221] As described above, in this embodiment, the lifting device 1 includes: a column 6, a lifting component 8 guided by the column 6, a motor 9 that generates power to lift the lifting component 8, a controller 10 that controls the motor 9, a housing 12 fixed to at least a portion of the column 6 and housing the motor 9 and the controller 10, a transmission mechanism 11 that transmits the power of the motor 9 to the lifting component 8, and a battery mounting section 13 disposed in the housing 12 and for mounting a battery pack 39 that supplies power to the motor 9.

[0222] In the above configuration, the motor 9, controller 10, and battery mounting section 13 are concentrated in the housing 12. Therefore, it is possible to prevent the lifting device 1 from becoming too large. In addition, since the motor 9, controller 10, and battery mounting section 13 are concentrated in the housing 12, it is possible to prevent the cables connecting these motors 9, controllers 10, and battery mounting sections 13 from becoming too long.

[0223] In this embodiment, at least a portion of the lifting component 8 rises and falls on the front side of the column 6. The housing 12 is fixed to the rear surface of the column 6.

[0224] In the above configuration, the lifting component 8 can move up and down smoothly.

[0225] In this embodiment, the housing 12 is fixed to the center of the column 6 in the vertical direction.

[0226] In the above configuration, the user of the lifting device 1 can smoothly install the battery pack 39 into the battery mounting section 13 provided in the housing 12.

[0227] In one embodiment, at least a portion of the transfer mechanism 11 is housed within the housing 12.

[0228] In the above configuration, since the transmission mechanism 11 is also concentrated in the housing 12, the size of the lifting device 1 can be suppressed. In addition, since the transmission mechanism 11 is arranged near the motor 9, the complexity and size of the transmission mechanism 11 can be suppressed.

[0229] In one embodiment, the transmission mechanism 11 includes a deceleration mechanism 65 that reduces the rotation of the motor 9, and the deceleration mechanism 65 is housed in the housing 12.

[0230] In the above configuration, since the reduction mechanism 65 is concentrated in the housing 12, the size of the lifting device 1 can be suppressed. In addition, since the reduction mechanism 65 is arranged near the motor 9, the complexity and size of the reduction mechanism 65 can be suppressed.

[0231] In this embodiment, the battery mounting part 13 is provided on the outer surface of the housing 12.

[0232] In the above configuration, the user of the lifting device 1 can smoothly install the battery pack 39 into the battery mounting section 13. In addition, it can prevent the casing 12 from becoming too large.

[0233] In one embodiment, the battery mounting section 13 includes a first battery mounting section 13A and a second battery mounting section 13B.

[0234] In the above configuration, the user of the lifting device 1 can install the battery pack 39 on the appropriate battery mounting part 13 of the first battery mounting part 13A and the second battery mounting part 13B according to, for example, the usage of the lifting device 1.

[0235] In one embodiment, a first battery pack 39A with a first rated voltage is installed in the first battery mounting section 13A, and a second battery pack 39B with a second rated voltage is installed in the second battery mounting section 13B.

[0236] In the above configuration, the user of the lifting device 1 can effectively utilize two battery packs 39 with different rated voltages.

[0237] In one embodiment, the second battery mounting section 13B may be disposed next to the first battery mounting section 13A.

[0238] In the above configuration, the user of the lifting device 1 can smoothly install the battery pack 39 in either the first battery mounting section 13A or the second battery mounting section 13B.

[0239] In one embodiment, the lifting device 1 includes a cover member 44, which covers the second battery mounting portion 13B when the first battery pack 39A is installed in the first battery mounting portion 13A, and covers the first battery mounting portion 13A when the second battery pack 39B is installed in the second battery mounting portion 13B.

[0240] In the above configuration, the simultaneous installation of two battery packs 39 can be prevented. Simultaneous installation of two battery packs 39 could potentially complicate the electronic circuitry or control. Since the simultaneous installation of two battery packs 39 can be prevented, the complexity of the electronic circuitry and control can be suppressed. Furthermore, since the battery mounting portions 13 of the first battery mounting portion 13A and the second battery mounting portion 13B that are not fitted with battery packs 39 are covered by the cover member 44, the battery mounting portions 13 can be protected.

[0241] In one embodiment, the cover member 44 is slidably supported on the housing 12.

[0242] In the above configuration, the user of the lifting device 1 can easily cover either the first battery mounting part 13A or the second battery mounting part 13B by means of the sliding cover component 44.

[0243] In this embodiment, the relative positions of the first battery mounting section 13A and the second battery mounting section 13B are determined such that when the first battery pack 39A is installed in the first battery mounting section 13A, the second battery pack 39B cannot be installed in the second battery mounting section 13B, and when the second battery pack 39B is installed in the second battery mounting section 13B, the first battery pack 39A cannot be installed in the first battery mounting section 13A.

[0244] In the above configuration, for example, even without the cover component 44, when the first battery pack 39A is installed in the first battery mounting section 13A, even if it is desired to install the second battery pack 39B in the second battery mounting section 13B, the second battery pack 39B cannot be installed in the second battery mounting section 13B because the second battery pack 39B will encounter the first battery pack 39A installed in the first battery mounting section 13A. Similarly, when the second battery pack 39B is installed in the second battery mounting section 13B, even if it is desired to install the first battery pack 39A in the first battery mounting section 13A, the first battery pack 39A cannot be installed in the first battery mounting section 13A because the first battery pack 39A will encounter the second battery pack 39B installed in the second battery mounting section 13B.

[0245] In one embodiment, the battery pack 39 is installed in the battery mounting section 13 by inserting it into the battery mounting section 13 from above.

[0246] In the above configuration, the user of the lifting device 1 can smoothly install the battery pack 39 into the battery mounting section 13.

[0247] In one embodiment, the lifting device 1 includes an operating device 15, which is disposed in the housing 12 and sends the operating signal of the drive motor 9 to the controller 10.

[0248] In the above configuration, since the operating device 15 is also concentrated in the housing 12, the size of the lifting device 1 can be suppressed. In addition, since the operating device 15 is arranged near the controller 10, the situation where the cable connecting the operating device 15 and the controller 10 becomes longer can be suppressed.

[0249] In one embodiment, the operating device 15 includes a button disposed on the upper surface of the housing 12.

[0250] With the above configuration, the user of the lifting device 1 can operate the buttons smoothly.

[0251] In one embodiment, the buttons include a rise button 15B for raising the lifting member 8 and a fall button 15C for lowering the lifting member 8.

[0252] In the above configuration, the user of the lifting device 1 can raise and lower the lifting component 8 by operating the up button 15B and the down button 15C.

[0253] In this embodiment, the transmission mechanism 11 includes: a rotating body 49 that rotates via a motor 9; a lifting pulley 50 that is rotatably supported on the lifting member 8; and a cable 52 that connects the rotating body 49 and the lifting pulley 50. The lifting member 8 moves up and down by winding and unwinding the cable 52 through the rotating body 49.

[0254] In the above configuration, the transmission mechanism 11 can properly transmit the power of the motor 9 to the lifting component 8.

[0255] In this embodiment, the transmission mechanism 11 has a column pulley 51 that is rotatably supported on the upper end of the column 6. The cable 52 connects the rotating body 49 to the lifting pulley 50 while it is attached to the column pulley 51.

[0256] In the above configuration, the transmission mechanism 11 can properly transmit the power of the motor 9 to the lifting component 8.

[0257] In one embodiment, the lifting device 1 includes a lamp unit 14, which is disposed at the upper end of the column 6 to illuminate the front of the lifting component 8.

[0258] In the above configuration, the user of the lifting device 1 can operate the lifting device 1 properly, even in the dark.

[0259] In one embodiment, the lifting device 1 includes a movable frame 2, which is connected to the lower end of the column 6 and supports the wheels 3.

[0260] In the above configuration, the user of the lifting device 1 can move the lifting device 1 smoothly.

[0261] <Second Implementation>

[0262] The second embodiment will be described. In the following description, the same reference numerals are used for the same or equivalent components as those in the above embodiment, and the description of the components is simplified or omitted.

[0263] In this embodiment, a variation of the transmission mechanism 11 described in the first embodiment will be explained. In the first embodiment, the one-way bearing 87 is disposed on the rotational shaft of the rotating body 49. In the transmission mechanism 211 of this embodiment, the one-way bearing 287 and the clutch portion 300 are disposed on a rotational shaft different from the rotational shaft of the rotating body 49. In this embodiment, the one-way bearing 287 and the clutch portion 300 are disposed on the rotational shaft of the motor 209. By disposing the one-way bearing 287 and the clutch portion 300 on the rotational shaft of the motor 209, when no power is transmitted from the motor 209 to the rotating body 49, it is possible to suppress the application of excessive load to the one-way bearing 287 and the clutch portion 300. By suppressing the application of excessive load to the one-way bearing 287, damage to the one-way bearing 287 and wear of the clutch portion 300 can be suppressed.

[0264] Figure 35 This is a front view showing the lifting device 201 of this embodiment. Similar to the first embodiment described above, the lifting device 201 includes: a movable frame 2, wheels 3, casters 4, a column 6, a handle 7, a lifting component 8, a housing 12, a battery mounting section 13, and a lamp unit 14.

[0265] The housing 12 houses at least a portion of the motor 209 and the transmission mechanism 211. The motor 209 generates power to raise and lower the lifting component 8. The transmission mechanism 211 transmits the rotational force of the motor 209 to the lifting component 8.

[0266] Figure 36 This is a front view showing the transmission mechanism 211 of this embodiment. Figure 37 , Figure 38 as well as Figure 39 These are cross-sectional views showing the transmission mechanism 211 of this embodiment. Figure 37 Equivalent to Figure 36 EE line section view. Figure 38 Equivalent to Figure 36 FF line section view. Figure 39 Equivalent to Figure 36 GG line section view. Figure 40 This is a perspective view taken from the rear, showing the main parts of the transmission mechanism 211 of this embodiment. Figure 41 This is a perspective view taken from the front, showing the main parts of the transmission mechanism 211 of this embodiment.

[0267] The transmission mechanism 211 includes: a main shaft 264 connected to the rotating body 49; a reduction mechanism 265 that transmits the rotation of the motor 209 to the main shaft 264; a one-way bearing 287 that locks when no power is being transmitted from the motor 209 to the rotating body 49; a first bearing housing 66A; a first gearbox 67A positioned forward of the first bearing housing 66A; a second gearbox 67B positioned forward of the first gearbox 67A; and a second bearing housing 66B positioned forward of the second gearbox 67B. Similar to the embodiment described above, the rotating body 49 is disposed within the internal space of the column 6. The other end of the cable 52 is fixed to the rotating body 49.

[0268] Motor 209 is an internal rotor type brushless motor. Motor 209 has a stator 270 and a rotor 271. The rotor 271 is located inside the stator 270.

[0269] Rotor 271 has a rotor core 272 and a rotor drive shaft 273. The rotor core 272 is disposed around the rotor drive shaft 273. The rotor drive shaft 273 is fixed to the rotor core 272. Rotor 271 rotates about a rotation axis AX. The rotation axis AX of rotor 271 extends in the front-rear direction.

[0270] The rotor drive shaft 273 is arranged to extend in the front-to-back direction. The rotor drive shaft 273 rotates about the rotation axis AX (first rotation axis). The rear portion of the rotor drive shaft 273 is rotatably supported by a bearing 274. The front portion of the rotor drive shaft 273 is rotatably supported by a bearing 275A. The bearing 274 is held in a first bearing housing 66A. The bearing 275A is held in a first gearbox 67A. The rear end of the bearing 275A is supported by an anti-detachment ring 275R. The outer periphery of the anti-detachment ring 275R is disposed in a groove 671, which is located on the inner circumferential surface of the first gearbox 67A. The anti-detachment ring 275R can prevent the bearing 275A from falling rearward from the first gearbox 67A.

[0271] Fan 276 is fixed to the rear end of rotor drive shaft 273. Fan 276 rotates together with rotor drive shaft 273. The rotation of fan 276 generates airflow for cooling motor 209.

[0272] The first bearing housing 66A and the first gearbox 67A are fixed together by screws 268. The stator 270 is clamped between the first gearbox 67A and the first bearing housing 66A from the front and rear directions. The stator 270 is fixed to both the first gearbox 67A and the first bearing housing 66A. The second gearbox 67B is connected to the front end of the first gearbox 67A. The first gearbox 67A and the second gearbox 67B are fixed together by screws (not shown). The second bearing housing 66B is fixed to the front end of the second gearbox 67B. The second gearbox 67B and the second bearing housing 66B are fixed together by screws (not shown). The first bearing housing 66A, the first gearbox 67A, the second gearbox 67B, and the second bearing housing 66B are all housed in the housing 12. The reduction mechanism 265 is housed in the second bearing housing 66B and the second gearbox 67B.

[0273] Spindle 264 is connected to rotating body 49. Spindle 264 and rotating body 49 rotate about a rotation axis CX (second rotation axis) different from rotation axis AX. The rear of spindle 264 is rotatably supported by bearing 79A. The front of spindle 264 is rotatably supported by bearing 79B. Bearing 79A is held in second gearbox 67B. Bearing 79B is supported in second bearing housing 66B.

[0274] At least a portion of the rotating body 49 is positioned closer to the front than the spindle 264. The rotating body 49 is fixed to the front end portion 264T of the spindle 264. A hole 49T is provided at the rear of the rotating body 49 for the insertion of the front end portion 264T of the spindle 264. The outer peripheral surface of the front end portion 264T includes a pair of curved surfaces 264A and a pair of flat surfaces 264B. The inner peripheral surface of the hole 49T includes a pair of curved surfaces 49A and a pair of flat surfaces 49B. The front end portion 264T is inserted into the hole 49T such that curved surfaces 264A and 49A are opposed to each other, and flat surfaces 264B and 49B are opposed to each other. This suppresses the relative rotation between the spindle 264 and the rotating body 49. The rotating body 49 rotates together with the spindle 264 about the rotation axis CX.

[0275] The rear end of the rotating body 49 is rotatably supported by the bearing 80. The front end of the rotating body 49 is rotatably supported by the bearing 81. The bearing 80 is supported by the column 6 via a bushing 82A. Figure 24 As shown, an opening 69 is provided in the column 6. The bushing 82A is disposed in the opening 69 of the column 6 in the same manner as the bushing 82 according to the first embodiment described above. The bearing 81 is supported on the column 6 by means of the bushing 82B.

[0276] The transmission mechanism 211 has an intermediate drive shaft 110, which is connected to the rotor drive shaft 273 via a second shim 151, a driven-side clutch 150, a drive-side clutch 140, and a first shim 141. The intermediate drive shaft 110 is positioned closer to the front of the rotor drive shaft 273. The intermediate drive shaft 110 is arranged to extend in the front-rear direction. The intermediate drive shaft 110 rotates about the rotation axis AX by the rotational force of the rotor drive shaft 273. The rear portion of the intermediate drive shaft 110 is rotatably supported by a bearing 275B. The front portion of the intermediate drive shaft 110 is rotatably supported by a needle roller bearing 170. The bearing 275B is held in the second gearbox 67B. The needle roller bearing 170 is held in the second gearbox 67B.

[0277] The reduction mechanism 265 transmits the rotational force of the rotor drive shaft 273 to the main shaft 264. The reduction mechanism 265 reduces the rotation of the rotor drive shaft 273, causing the main shaft 264 to rotate at a lower speed than the rotor drive shaft 273. The rotating body 49 rotates due to the rotation of the main shaft 264. The reduction mechanism 265 is connected to the rotor drive shaft 273 via the intermediate drive shaft 110, the second shim 151, the driven-side clutch 150, the drive-side clutch 140, and the first shim 141.

[0278] The reduction mechanism 265 includes: an input gear 278 (first gear) fixed to the front end of the intermediate drive shaft 110; an output gear 285 (second gear) fixed to the main shaft 264; and a first intermediate gear 283 (third gear) and a second intermediate gear 284 (third gear) that transmit the rotational force of the input gear 278 to the output gear 285. The input gear 278 rotates around the rotation axis AX. The output gear 285 rotates around the rotation axis CX. The first intermediate gear 283 and the second intermediate gear 284 rotate around a rotation axis BX (third rotation axis), which is different from the rotation axes AX and CX, respectively. The rotation axis BX extends in the front-rear direction. The first intermediate gear 283 meshes with the input gear 278. The second intermediate gear 284 meshes with the output gear 285.

[0279] The first intermediate gear 283 and the second intermediate gear 284 are integral. The first intermediate gear 283 and the second intermediate gear 284 rotate together around the rotation axis BX. A rod portion 284L protrudes forward from the front end of the second intermediate gear 284. The first intermediate gear 283 is positioned around the rod portion 284L. The first intermediate gear 283 is fixed to the rod portion 284L. The rear end of the second intermediate gear 284 is rotatably supported by a bearing 86A. The front end of the second intermediate gear 284 is rotatably supported by a bearing 86B. Bearing 86A is held in the second gearbox 67B. Bearing 86B is held in the second bearingbox 66B.

[0280] The output gear 285 is disposed around the main shaft 264. The output gear 285 is fixed to the main shaft 264. A key 285A is provided between the main shaft 264 and the output gear 285. The key 285A is used to inhibit relative rotation between the output gear 285 and the main shaft 264. The output gear 285 and the main shaft 264 rotate together around the rotation axis CX. The output gear 285 is rotated by the motor 209 via the input gear 278, the first intermediate gear 283, and the second intermediate gear 284. When the output gear 285 rotates by the motor 209, the main shaft 264 and the output gear 285 rotate together around the rotation axis CX.

[0281] The output gear 285 has more teeth than the input gear 278. The output gear 285 has more teeth than both the first intermediate gear 283 and the second intermediate gear 284. The first intermediate gear 283 has more teeth than the input gear 278. The first intermediate gear 283 has more teeth than the second intermediate gear 284. The reduction mechanism 265 performs a two-stage reduction in the rotational speed of the intermediate drive shaft 110 to rotate the main shaft 264.

[0282] The one-way bearing 287 inhibits the descent of the lifting component 8 when no power is transmitted from the motor 209 to the lifting component 8. In this embodiment, the one-way bearing 287 is fixed by the flange portion 131 and the flange portion 121 when no power is transmitted from the motor 209 to the main shaft 264, so that the second washer 151, the driven-side clutch 150, the drive-side clutch 140, and the first washer 141 do not rotate relative to each other. That is, the second washer 151, the driven-side clutch 150, the drive-side clutch 140, and the first washer 141 are clamped by the flange portion 131 and the flange portion 121 and integrated. The one-way bearing 287 is disposed on a rotation axis different from the rotation axis CX of the main shaft 264. In this embodiment, the one-way bearing 287 is disposed on the rotation axis AX of the rotor drive shaft 273 and the intermediate drive shaft 110. The one-way bearing 287 includes a one-way clutch capable of engaging the rotor drive shaft 273 with the intermediate drive shaft 110. With the rotor drive shaft 273 and the intermediate drive shaft 110 engaged by means of the second shim 151, the driven clutch 150, the drive clutch 140, and the first shim 141, the intermediate drive shaft 110 and the rotor drive shaft 273 rotate together around the rotation axis AX.

[0283] The one-way bearing 287 includes: a first support member 120 fixed to the rotor drive shaft 273, a second support member 130 fixed to the intermediate drive shaft 110, a drive-side clutch 140 supported on the first support member 120, a driven-side clutch 150 supported on the second support member 130, and an outer cylinder 160 disposed around the drive-side clutch 140 and the driven-side clutch 150.

[0284] A first support member 120 is disposed around the rotor drive shaft 273. The front portion of the rotor drive shaft 273 is pressed into the first support member 120. The first support member 120 rotates together with the rotor drive shaft 273. The first support member 120 has a flange portion 121 and a cylindrical portion 122 protruding forward from the flange portion 121. The flange portion 121 is rotatably supported on a bearing 275A. The rotor drive shaft 273 is rotatably supported on the bearing 275A by means of the first support member 120.

[0285] The second support member 130 is disposed around the front end of the rotor drive shaft 273 and around the intermediate drive shaft 110. The rear end of the intermediate drive shaft 110 is pressed into the second support member 130. The second support member 130 rotates together with the intermediate drive shaft 110. The second support member 130 has a flange portion 131 and a cylindrical portion 132 protruding rearward from the flange portion 131. The flange portion 131 is rotatably supported on the bearing 275B. The intermediate drive shaft 110 is rotatably supported on the bearing 275B by means of the second support member 130.

[0286] The cylindrical portion 132 is disposed around the front end of the rotor drive shaft 273. A threaded tooth 112 is provided on the outer periphery of the front end of the rotor drive shaft 273. A threaded groove 114 is provided on the inner periphery of the cylindrical portion 132. The threaded tooth 112 of the rotor drive shaft 273 engages with the threaded groove 114 of the cylindrical portion 132.

[0287] The drive-side clutch 140 is substantially cylindrical. At least a portion of the drive-side clutch 140 is disposed around the cylindrical portion 122 of the first support member 120. The drive-side clutch 140 is rotatably supported on the cylindrical portion 122 of the first support member 120. A first washer 141 is disposed between at least a portion of the drive-side clutch 140 and the first support member 120. When the lifting member 8 rises, the drive-side clutch 140 rotates together with the rotor drive shaft 273 and the first support member 120 about the rotation axis AX. When the lifting member 8 descends, the drive-side clutch 140 does not rotate.

[0288] The driven-side clutch 150 is substantially cylindrical. At least a portion of the driven-side clutch 150 is disposed around the cylindrical portion 132 of the second support member 130. The driven-side clutch 150 is rotatably supported on the cylindrical portion 132 of the second support member 130. A second washer 151 is disposed between at least a portion of the driven-side clutch 150 and the second support member 130. When the lifting member 8 rises, the driven-side clutch 150 rotates together with the intermediate drive shaft 110 and the second support member 130 about the rotation axis AX. When the lifting member 8 descends, the driven-side clutch 150 does not rotate.

[0289] A one-way bearing 287 is disposed around the drive-side clutch 140 and the driven-side clutch 150. The one-way bearing 287 rotatably supports the drive-side clutch 140 and the driven-side clutch 150. The one-way bearing 287 is held in the first gearbox 67A.

[0290] like Figure 40 as well as Figure 41 As shown, the drive-side clutch 140 has a convex portion 142 protruding forward from the front end of the drive-side clutch 140 and a recessed portion 143 recessed rearward from the front end of the drive-side clutch 140. The driven-side clutch 150 has a recessed portion 152 recessed forward from the rear end of the driven-side clutch 150 and a convex portion 153 protruding rearward from the rear end of the driven-side clutch 150. By having the convex portion 142 disposed inside the recessed portion 152 and the convex portion 153 disposed inside the recessed portion 143, relative rotation between the drive-side clutch 140 and the driven-side clutch 150 can be suppressed. The convex portion 142, the recessed portion 152, the convex portion 153, and the recessed portion 143 each function as anti-rotation devices to suppress relative rotation between the drive-side clutch 140 and the driven-side clutch 150.

[0291] The intermediate drive shaft 110 and the second support member 130 are movable in the longitudinal direction relative to the rotor drive shaft 273 and the first support member 120. The intermediate drive shaft 110 is supported on the needle roller bearing 170 in a manner movable in the longitudinal direction. The driven clutch 150 is supported on the outer cylinder 160 in a manner movable in the longitudinal direction. When the intermediate drive shaft 110 and the second support member 130 move in the longitudinal direction, the driven clutch 150 moves together with the intermediate drive shaft 110 and the second support member 130 in the longitudinal direction. When the intermediate drive shaft 110 and the second support member 130 move in the longitudinal direction, the bearing 275B moves together with the intermediate drive shaft 110 and the second support member 130 in the longitudinal direction.

[0292] The rotor drive shaft 273 is screwed into the second support member 130 via threads 112 and grooves 114. The relative rotation of the rotor drive shaft 273 and the second support member 130 causes the relative rotation of threads 112 and grooves 114. This relative rotation of threads 112 and grooves 114 allows the intermediate drive shaft 110 and the second support member 130 to move relative to the rotor drive shaft 273 and the first support member 120 in the front-rear direction.

[0293] When the motor 209 is driven to rise by the lifting member 8, although the rotor drive shaft 273 rotates when the lifting member 8 rises, the rotation of the flange 131 becomes heavier because the load of the lifting member 8 is added to the flange 131. With the flange 131 rotating under this heavier load, the flange 131 moves rearward toward the motor 209 due to the relative rotation of the thread 112 of the rotor drive shaft 273 and the thread groove 114 of the cylinder 132. When the flange 131 moves toward the motor 209, the second washer 151, the driven clutch 150, the drive clutch 140, and the first washer 141 are clamped together by the flange 131 and the flange 121. The one-way bearing 287 can rotate in the direction of rotation in which the lifting member 8 rises. Therefore, when the motor 209 is driven to rise by the lifting member 8, the second washer 151, the driven clutch 150, the driving clutch 140, and the first washer 141 rotate in an integrated state where they are clamped by the flange portion 131 and the flange portion 121.

[0294] When the motor 209 stops driving and does not cause the output gear 285 to rotate, the load of the lifting member 8 is applied to the flange portion 131. When a load is applied to the flange portion 131, the flange portion 131 moves closer to the motor 209 due to the relative rotation of the threaded teeth 112 of the rotor drive shaft 273 and the threaded groove 114 of the cylinder portion 132. When the flange portion 131 moves closer to the motor 209, the second washer 151, the driven-side clutch 150, the drive-side clutch 140, and the first washer 141 are clamped together by the flange portion 131 and the flange portion 121. Since the one-way bearing 287 does not rotate in the direction of rotation that causes the lifting member 8 to descend, the one-way bearing 287 is locked, thus restricting the rotation of the main shaft 264.

[0295] When the motor 209 is driven to descend by the lifting member 8, the rotor drive shaft 273 rotates in the opposite direction to when the lifting member 8 rises. Through the relative rotation of the threaded teeth 112 of the rotor drive shaft 273 and the threaded grooves 114 of the cylindrical portion 132, the flange portion 131 moves forward, moving away from the motor 209. As the flange portion 131 moves away from the motor 209, it separates from the second washer 151, creating a gap between them. Consequently, the integration of the second washer 151, the driven-side clutch 150, the driving-side clutch 140, and the first washer 141 is released, and each of these components becomes free. In this case, the rotation of the spindle 264 is not affected by the one-way bearing 287, and the rotational force of the motor 209 is transmitted to the spindle 264.

[0296] As explained above, in this embodiment, the one-way bearing 287 is disposed on a rotating shaft AX that is different from the rotating shaft CX of the rotating body 49. By disposing the one-way bearing 287 on the rotating shaft AX of the motor 209, when no power is being transmitted from the motor 209 to the rotating body 49, it is possible to suppress the situation where excessive load is applied to the one-way bearing 287 and the motor 209. In addition, the load (torque) applied from the rotating body 49 to the one-way clutch of the one-way bearing 287 is attenuated by the reduction mechanism 265. Thus, it is possible to suppress the situation where excessive load is applied to the one-way bearing 287.

[0297] Furthermore, in this embodiment, the one-way bearing 287 can also be configured on the rotating shaft BX.

Claims

1. A lifting device, characterized in that, have: Columns; The lifting component is guided by the aforementioned column; A motor that generates the power to raise and lower the aforementioned lifting components; The controller controls the aforementioned motors; A housing, which is fixed to at least a portion of the aforementioned column, and houses the aforementioned motor and the aforementioned controller; A transmission mechanism that transmits the power of the aforementioned motor to the aforementioned lifting component; and A battery mounting section is provided in the aforementioned housing for mounting the battery pack that supplies power to the aforementioned motor. The aforementioned battery mounting section includes a first battery mounting section and a second battery mounting section. The second battery mounting section is located next to the first battery mounting section. The relative positions of the first battery mounting section and the second battery mounting section are determined such that when the battery pack is installed in the first battery mounting section, it is impossible to install the battery pack in the second battery mounting section, and when the battery pack is installed in the second battery mounting section, it is impossible to install the battery pack in the first battery mounting section.

2. The lifting device according to claim 1, characterized in that, At least a portion of the aforementioned lifting components moves up and down on the front side of the aforementioned column. The aforementioned housing is fixed to the rear surface of the aforementioned column.

3. The lifting device according to claim 2, characterized in that, In the vertical direction, the aforementioned shell is fixed to the central part of the aforementioned column.

4. The lifting device according to any one of claims 1 to 3, characterized in that, At least a portion of the aforementioned transmission mechanism is housed within the aforementioned housing.

5. The lifting device according to claim 4, characterized in that, The aforementioned transmission mechanism includes a speed reduction mechanism for reducing the rotation of the aforementioned motor. The aforementioned speed reduction mechanism is housed within the aforementioned housing.

6. The lifting device according to any one of claims 1 to 3, characterized in that, The aforementioned battery mounting portion is located on the outer surface of the aforementioned housing.

7. The lifting device according to claim 1, characterized in that, A battery pack with a first rated voltage is installed in the first battery mounting section mentioned above. A battery pack with a second rated voltage is installed in the aforementioned second battery mounting section.

8. The lifting device according to claim 1, characterized in that, The aforementioned lifting device includes a cover component, which covers the second battery mounting portion when the battery pack is installed in the first battery mounting portion, and covers the first battery mounting portion when the battery pack is installed in the second battery mounting portion.

9. The lifting device according to claim 8, characterized in that, The aforementioned cover component is supported on the aforementioned housing in a slidable manner.

10. The lifting device according to any one of claims 1 to 3, characterized in that, The battery pack is installed in the battery mounting part by being inserted into the battery mounting part from above.

11. The lifting device according to any one of claims 1 to 3, characterized in that, The lifting device is equipped with an operating device, which is located in the housing and sends the operating signal for driving the motor to the controller.

12. The lifting device according to claim 11, characterized in that, The aforementioned operating device includes buttons. The aforementioned button is located on the upper surface of the aforementioned housing.

13. The lifting device according to claim 12, characterized in that, The buttons include a raise button for raising the lifting component and a lower button for lowering the lifting component.

14. The lifting device according to any one of claims 1 to 3, characterized in that, The aforementioned transmission mechanism has: A rotating body that rotates via the aforementioned motor; The lifting pulley is rotatably supported on the aforementioned lifting component; as well as A cable connects the rotating body to the lifting pulley. The lifting component moves up and down by winding and releasing the cable through the rotating body.

15. The lifting device according to claim 14, characterized in that, The aforementioned transmission mechanism has a column pulley, which is rotatably supported on the upper end of the column. The aforementioned cable connects the rotating body to the lifting pulley while it is suspended on the aforementioned column pulley.

16. The lifting device according to any one of claims 1 to 3, characterized in that, It is equipped with a lamp unit, which is disposed at the upper end of the column to illuminate the front of the lifting component.

Images