WO2023119440A1 - アシスト装置 - Google Patents

アシスト装置 Download PDF

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Publication number
WO2023119440A1
WO2023119440A1 PCT/JP2021/047395 JP2021047395W WO2023119440A1 WO 2023119440 A1 WO2023119440 A1 WO 2023119440A1 JP 2021047395 W JP2021047395 W JP 2021047395W WO 2023119440 A1 WO2023119440 A1 WO 2023119440A1
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WO
WIPO (PCT)
Prior art keywords
assist device
attachment
shaft
connection
holder
Prior art date
Application number
PCT/JP2021/047395
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
浩嗣 椎名
裕輝 吉冨
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2023568840A priority Critical patent/JP7690605B2/ja
Priority to PCT/JP2021/047395 priority patent/WO2023119440A1/ja
Publication of WO2023119440A1 publication Critical patent/WO2023119440A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor

Definitions

  • the present invention relates to an assist device.
  • Patent Literature 1 describes a main body of a mobility assistance device having a carriage and drive wheels.
  • Patent Literature 1 discloses a configuration in which a carriage and a main body are connected in a state in which an engagement plate of the main body is inserted into a connection unit bolted to the carriage.
  • Patent Document 2 discloses a power assist device provided with a pair of L-shaped connecting arms in the width direction.
  • a cart and a power assist device are connected by hooking a strut part in the width direction of the cart with a connecting arm that rotates at a fixed position in the width direction.
  • Patent Documents 1 and 2 have a problem of lacking versatility because the assisting device and the article to be assisted are connected by a dedicated connecting component provided in the assisting device. For this reason, in order to connect the assisting device to various articles, it is necessary to separately manufacture a dedicated connection part for each article to be assisted, which is a problem in that it tends to be time-consuming and costly.
  • SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly versatile assisting device whose connection position can be easily changed according to the attachment position of a predetermined article to which an assisting force is to be applied.
  • the assisting device is an assisting device for applying an assisting force for moving a predetermined article when moving the predetermined article, wherein the assisting device includes a driving source for applying the assisting force and a driving force of the driving source. and an inserting portion for inserting a holder portion which is a part of an attachment connected to the predetermined article, wherein the attachment includes the holder portion and a connecting portion connected to the predetermined article. and, wherein the connection portion includes a connection end member, and the connection end member is configured such that a connection position of the connection end member can be changed according to a mounting position on the side of the predetermined article. It is characterized by
  • connection position can be easily changed according to the attachment position on the side of the predetermined article to which the assisting force is to be applied.
  • FIG. 1 is a perspective view of an assist device according to an embodiment of the present invention and a push cart assisted by the assist device.
  • FIG. 2 is a left side view of an assist device and a push cart assisted by the assist device according to the embodiment of the present invention.
  • FIG. 3 is a plan view of an assist device and a push cart assisted by the assist device according to the embodiment of the present invention.
  • FIG. 4 is a perspective view of the assist device as seen from the front.
  • FIG. 5 is a cross-sectional view taken along line VV of FIG.
  • FIG. 6 is a left side view of the assist device with the illustration of the side cover omitted.
  • FIG. 7 is a perspective view of the inside of the main body viewed from the front left.
  • FIG. 1 is a perspective view of an assist device according to an embodiment of the present invention and a push cart assisted by the assist device.
  • FIG. 2 is a left side view of an assist device and a push cart assisted by the assist device according to the embodiment of the present
  • FIG. 8 is a perspective view of the rear frame viewed from the rear left.
  • FIG. 9 is a perspective view of the back frame viewed from the front left.
  • FIG. 10 is a perspective view of the training wheel support member as seen from the front left.
  • FIG. 11 is a diagram showing a state in which the attachment and the assist device are separated.
  • FIG. 12 is a perspective view of the attachment.
  • FIG. 13 is a perspective view of the attachment as seen from the front left.
  • 14 is a cross-sectional view taken along line XIV-XIV of FIG. 13.
  • FIG. FIG. 15 is a left side view of the attachment showing a state where the inserted portion is held at the insertion position.
  • FIG. 16 is a left side view of the attachment showing a state in which the inserted portion is held at the retracted position.
  • FIG. 17 is a bottom view of the attachment.
  • FIG. 18 is a vertical cross-sectional view showing the periphery of the operation member, showing a state in which the operation member has moved to the fixed position.
  • FIG. 19 is a vertical cross-sectional view showing the periphery of the operation member, showing a state in which the operation member has moved to the release position.
  • FIG. 1 is a perspective view of an assist device 1 and a push cart 200 assisted by the assist device 1 according to an embodiment of the present invention.
  • FIG. 2 is a left side view of the assist device 1 and the push cart 200 assisted by the assist device 1 according to the embodiment of the present invention.
  • FIG. 3 is a plan view of the assist device 1 and the push cart 200 assisted by the assist device 1 according to the embodiment of the present invention.
  • the assist device 1 includes a box-shaped main body 2, driving wheels 3 supported by the main body 2, auxiliary wheels 4 supported behind the driving wheels 3, and a handle shaft 5 extending upward from the main body 2. , a handlebar 6 supported by the upper end of the handle shaft 5 , and a grip 7 provided on the handlebar 6 .
  • the assist device 1 is an assist device that assists movement of a predetermined article.
  • the predetermined article is not particularly limited as long as it can be connected to the assist device 1, but a vehicle that has a frame 210 and wheels 220 supported by the frame 210 and that is pushed by a person to rotate the wheels 220 is desirable.
  • a case where the assist device 1 is connected to a large pushcart 200 on which an infant can be placed will be described below as an example of the predetermined article.
  • the pushcart 200 is also called a large cart, a pushcar, a walking cart, or a walking cart.
  • This push cart 200 can carry a plurality of infants, and is used, for example, when a worker such as a nursery teacher moves the infants from a nursery facility to an arbitrary place such as a park.
  • the push cart 200 has a frame 210.
  • the frame 210 is framed in a box shape.
  • the frame body 210 has a lower frame 211 arranged in a rectangular shape on the bottom surface of the push cart 200 .
  • Support frames 212 , 213 , 214 , and 215 extending vertically are provided at the four corners of the lower frame 211 .
  • An upper frame 216 facing the lower frame 211 is supported on top of the support frames 212-215.
  • a housing shape 218 is constructed in which a wall member 217 is appropriately supported and the top is open.
  • the support frames 212 and 213 on the rear side are connected in the horizontal direction (width direction) in a substantially U shape above.
  • the support frames 214 and 215 on the front side are connected in the horizontal direction (width direction) in a substantially U shape above.
  • a gripping frame 219 that curves rearward is supported on the support frames 212 and 213 on the rear side.
  • the grip frame 219 has a substantially U-shape in plan view and protrudes rearward from the support frames 212 and 213 .
  • a pair of main wheels 221 constituting wheels 220 are supported on the lower frame 211 in the width direction. Further, casters 222 constituting wheels 220 are supported at the lower ends of the support frames 212-215.
  • the assist device 1 When the assist device 1 is not connected, when the operator pushes the push cart 200 , the push cart 200 is pushed by holding the grasping frame 219 . As a result, the main wheels 221 and casters 222 rotate, and the push cart 200 moves forward.
  • An assist device 1 can be connected to the rear portion of the push cart 200 .
  • FIG. 4 is a perspective view of the assist device 1 as seen from the front.
  • An attachment 50 for connecting the assist device 1 and the push cart 200 is attached to the assist device 1.
  • the assist device 1 basically means the assist device 1 in which the attachment 50 is not connected.
  • the assist device 1 corresponds to the power unit.
  • the attachment 50 and the assist device 1 are separate bodies. However, in a state where the attachment 50 is attached to the assist device 1, the term "assist device 1" may be used to indicate the entirety of the assist device 1 and the attachment 50.
  • FIG. 1 is a perspective view of the assist device 1 as seen from the front.
  • An attachment 50 for connecting the assist device 1 and the push cart 200 is attached to the assist device 1.
  • the assist device 1 basically means the assist device 1 in which the attachment 50 is not connected.
  • the assist device 1 corresponds to the power unit.
  • the attachment 50 and the assist device 1 are separate bodies. However, in a state where the attachment 50 is attached to the assist device 1, the term "assist device 1" may be used
  • the main body 2 (see FIG. 2) of the assist device 1 has a frame 11 (see FIG. 6).
  • An exterior cover 12 is supported by the frame 11 .
  • the exterior cover 12 has a front cover 12A, a rear cover 12B (see FIG. 1), a pair of left and right side covers 12C and 12D (see FIGS. 1 and 4), and an upper lid 12F.
  • the side covers 12C and 12D have a substantially vertically long rectangular shape with rounded corners when viewed from the side. In other words, the side covers 12C and 12D are vertically elongated and substantially oval-shaped.
  • the lid 12F is curved forward and backward along the outer peripheral shape of the upper portions of the side covers 12C and 12D.
  • an insertion opening 12A1 extending in the width direction is formed in the front cover 12A.
  • the attachment 50 is inserted into the main body 2 through the insertion opening 12A1.
  • a port opening 12A2 extending in the width direction is formed above the insertion opening 12A1.
  • the power supply port 13 is exposed forward from the port opening 12A2.
  • the port opening 12A2 is closed by a plate-shaped shutter 12A3 so as to be openable and closable.
  • the shutter 12A3 is movably supported by the front cover 12A.
  • the power supply port 13 can be protected by the shutter 12A3 when the power supply port 13 is not used.
  • the power supply port 13 has a plurality of output terminals.
  • the power supply port 13 of this embodiment includes a USB port 13A and an AC output terminal 13B.
  • USB is an abbreviation for Universal Serial Bus.
  • AC is an abbreviation for Alternating Current.
  • the power supply port 13 is arranged on the front cover 12A side, but instead of this, the power supply port 13 may be provided on the rear cover 12B side.
  • the electric cable (not shown) connected to the power supply port 13 and the cart 200 are likely to separate. Therefore, it is difficult for the electric cable to interfere with the push cart 200 side, and it is easy to keep the electric cable away from infants.
  • the power supply port 13 is located on the side of the rear cover 12B and on the side of the operator who operates the assist device 1, the operator can easily access the power supply port 13, thereby enhancing convenience.
  • FIG. 5 is a cross-sectional view taken along line VV of FIG.
  • the side covers 12C and 12D have outer peripheral frame portions 12G and 12H having cylindrical cross sections.
  • the outer peripheral frame portions 12G and 12H are made of a softer material than the front cover 12A and the rear cover 12B.
  • the outer peripheral frame portions 12G and 12H are made of urethane resin or PMMA.
  • PMMA is an abbreviation for polymeric methacrylate.
  • the outer peripheral frame portions 12G and 12H protrude outward in the vehicle width direction from the body surfaces 12J and 12K of the side covers 12C and 12D.
  • the ground G0 also means a road surface, a floor surface, and the like.
  • the decorative panels 12M and 12N are detachably fitted into the concave shapes formed by the enclosing shapes of the outer peripheral frame portions 12G and 12H and the body surfaces 12J and 12K.
  • the decorative panels 12M and 12N are provided with patterns, emblems, advertisements, and the like. By exchanging the decorative panels 12M and 12N, the appearance of the assist device 1 can be easily changed.
  • the decorative panels 12M and 12N are curved toward the body surfaces 12J and 12K as they approach the outer peripheral frame portions 12G and 12H.
  • the outer peripheral portions of the decorative panels 12M and 12N are recessed inward in the vehicle width direction from the outer peripheral frame portions 12G and 12H. As shown in FIG.
  • the decorative panels 12M and 12N are hollow between the body surfaces 12J and 12K. Therefore, even if the assist device 1 overturns, the outer peripheral frame portions 12G and 12H are likely to come into contact with the ground G0. In addition, even if the decorative panels 12M and 12N come into contact with each other, they are recessed to easily absorb the impact. Moreover, even if the decorative panels 12M and 12N are damaged, they can be easily replaced.
  • FIG. 6 is a left side view of the assist device 1 with the illustration of the side cover 12C omitted.
  • the frame 11 supports a box-shaped battery housing portion 15 whose top is open.
  • a battery 14 is detachably attached to the battery housing portion 15 .
  • the battery 14 supplies power to the in-wheel motor (driving source) M of the drive wheel 3, the power supply port 13 (see FIG. 4), a control device (not shown), and the like.
  • the in-wheel motor M is an electric motor that is housed inside the drive wheel 3 and has a drive shaft that is coaxial with the axle 3A1 of the drive wheel 3 .
  • An in-wheel motor M for the driving wheel 3 is controlled by a control device (not shown) supported by the main body 2 .
  • the control device includes a CPU, RAM, and ROM.
  • CPU is an abbreviation for Central Processing Unit.
  • ROM is an abbreviation for Read Only Memory.
  • RAM is an abbreviation for Random Access Memory.
  • the processor implements various functions of the assist device 1 by executing a computer program stored in a memory device or the like.
  • the battery housing portion 15 is supported by the lid 12F so that it can be opened and closed.
  • the lid 12F is rotatably supported by a hinge shaft 12F1 on the front side, and is opened as indicated by the chain double-dashed line in FIG. Since the lid 12F is rotated in a direction away from the handle shaft 5, it can be easily rotated largely regardless of whether the handle shaft 5 is present or not. Therefore, an operator can easily access the battery housing portion 15 through the large opening, and easily replace the battery 14 .
  • the lid 12F has a rounded periphery around the hinge shaft 12F1, so that the rounded side can easily approach the pushcart 200 even if the lid 12F opens due to impact or the like.
  • a rear frame 21 is arranged behind the battery housing portion 15 .
  • the handle shaft 5 is rotatably supported by the rear frame 21 .
  • the upper end of the handle shaft 5 supports a handlebar 6 extending in the left-right direction.
  • Handlebars 6 are provided with operable grips 7 .
  • a sensor (not shown) is provided in the grip 7, and an operation of the grip 7, such as gripping the grip 7 by the operator or rotating the grip 7, is detected, and detection information is sent to a control device (not shown). is entered in By operating the grip 7, for example, it is possible to set the magnification of the magnitude of the driving force generated when the assist device 1 is pushed.
  • FIG. 7 is a perspective view of the inside of the main body 2 as seen from the front left.
  • a gear 16 is supported at the lower end of the handle shaft 5 .
  • An endless belt-like belt 17 is wound around the gear 16 .
  • the belt 17 extends forward and is run around by the gear 18 of the driving wheel 3. - ⁇
  • the belt 17 is tensioned by a pulley 19 .
  • the drive wheel 3 has a drive wheel main body 3A.
  • the driving wheel main body 3A is rotatably supported by an axle frame 3B having a substantially U-shaped cross section via an axle 3A1 (see FIG. 6).
  • a wheel steering shaft 3C extending upward is formed on the upper surface of the axle frame 3B.
  • a gear 18 is supported on the wheel steering shaft 3C.
  • An insertion portion 51 into which the attachment 50 is inserted is formed between the battery storage portion 15 and the wheel steering shaft 3C.
  • the insertion portion 51 communicates with the outside through the insertion opening 12A1.
  • An upper guide roller 52 (see FIG. 7) is arranged behind the upper portion of the insertion opening 12A1.
  • the upper guide roller 52 guides the upper surface of the attachment 50 .
  • side guide rollers 53 are arranged in the width direction. The side guide rollers 53 guide the sides of the attachment 50 .
  • a space extending rearward from insertion opening 12A1 and surrounded by upper guide roller 52 and side guide roller 53 forms insertion portion 51 of the present embodiment.
  • the handle shaft 5 is provided at a position separated from the push cart 200, the handle bar 6 can be easily separated from the push cart 200, and the handle bar 6 can be moved as shown by the broken lines and dashed lines in FIGS.
  • the push cart 200 can be prevented from interfering.
  • the insertion opening 12A1 to which the attachment 50 is attached is the front surface of the main body 2 on the hand cart 200 side, and the entire attachment 50 is arranged below the upper end of the main body 2 . Therefore, the body portion 2 of the assist device 1 and the push cart 200 can be brought closer together and connected. In addition, there is no hindrance in handling the handlebar 6.
  • the center position 14A of the battery 14 is set to the rear of the turning shaft center 3C1 in a side view. Specifically, the center position 14A of the battery 14 is arranged between the steering shaft center 3C1 and the auxiliary wheels 4 in a side view. Therefore, the center of gravity is set between the driving wheels 3 and the auxiliary wheels 4 , and the driving wheels 3 and the auxiliary wheels 4 make it easy for the assist device 1 to stand on its own.
  • FIG. 8 is a perspective view of the rear frame 21 as seen from the rear left.
  • FIG. 9 is a perspective view of the rear frame 21 as seen from the front left.
  • the frame 11 has a back frame 21 .
  • the rear frame 21 has a plate-like shape that has a lateral width and extends in the vertical direction.
  • a pair of left and right cutouts 21A are formed in the lower end of the back frame 21 so as to be cut out in an upward rectangular shape.
  • a guide member 22 is supported on the lower rear surface of the rear frame 21 .
  • a through-hole-shaped handle hole 22A extending in the vertical direction is formed in the center portion of the guide member 22 in the width direction.
  • the handle shaft 5 is inserted into the handle hole 22A.
  • the handle shaft 5 is rotatably supported by the guide member 22 .
  • a lift shaft 23 extending in the vertical direction is inserted through the guide hole 22B.
  • the lifting shaft 23 is supported by the guide member 22 so as to be able to move up and down.
  • a training wheel support member 30 is supported at the lower end of the lifting shaft 23 .
  • a fitting hole 32 extending downward is formed in the upper portion of the training wheel support member 30 .
  • a pair of right and left fitting holes 32 are formed.
  • the elevating shaft 23 (see FIGS. 8 and 9) is fitted into the fitting hole 32 .
  • the lifting shaft 23, the training wheel support member 30, and the training wheels 4 can move together in the vertical direction.
  • a wide cover portion 33 extending upward is formed at the rear portion of the fitting hole 32 . The cover portion 33 protects the fitting position between the lifting shaft 23 and the fitting hole 32 from behind.
  • a link support portion 42 is provided below the lock member 41 .
  • the link support portion 42 is fixed to the rear frame 21 .
  • a vertically extending link rotating shaft 43 is rotatably supported by the link supporting portion 42 .
  • the link rotating shaft 43 is vertically longer than the link supporting portion 42 .
  • a radially extending first link 44 is fixed to the upper end of the link rotating shaft 43 .
  • the first link 44 is supported by the link rotating shaft 43 at its longitudinal middle portion.
  • the first link 44 extends radially on both sides of the link rotation shaft 43 .
  • FIG. 11 is a diagram showing a state in which the attachment 50 and the assist device 1 are separated.
  • 12 is a perspective view of the attachment 50.
  • the attachment 50 includes a connecting portion 60 connected to the push cart 200 and a holder portion 70 connected to the connecting portion 60 .
  • the connecting portion 60 and the holder portion 70 are separate bodies.
  • the connection portion 60 includes a pair of left and right hook portions (connection end members) 61 and 62 that are hooked on the pushcart 200, slide rods (shaft portions) 63 and 64 that support the hook portions 61 and 62, a slide rod 63, and a base 65 that slidably supports 64 .
  • FIG. 13 is a perspective view of the attachment 50 as seen from the front left.
  • the connecting portion 60 has a prismatic base portion 65 extending in the width direction.
  • the base portion 65 includes a base portion body 66, a frame portion 67 disposed in front of the base portion body 66, a front cover portion 68 disposed in front of the frame portion 67, and between the front cover portion 68 and the base portion body 66. , and a pressing portion 69 (see FIG. 14) arranged inside the frame shape of the frame portion 67 .
  • the base 65 supports the first slide rod 63 and the second slide rod 64 .
  • the slide rods 63 and 64 are supported by the base portion 65 while penetrating in the width direction.
  • a plurality of slide rods 63 and 64 are supported.
  • the slide rods 63, 64 are alternately arranged vertically.
  • the first slide rod 63 is biased to the left (one side in the width direction) of the second slide rod 64 .
  • One end of the first slide rod 63 supports the hook portion 61, and the other end supports the fixing member 63A.
  • a through hole 63A1 through which the second slide rod 64 is inserted is formed in the fixing member 63A.
  • the second slide rod 64 is configured substantially bilaterally symmetrical with respect to the first slide rod 63 . That is, the second slide rod 64 is biased to the right side (the other side in the width direction) of the first slide rod 63, the hook portion 62 is supported at the other end, and the fixing member 64A is supported at one end. . Also, the first slide rod 63 is inserted through the through hole 64A1 of the fixing member 64A.
  • the slide rods 63 and 64 are supported at both ends in the width direction, they are easily held in parallel and easily slide in the width direction with respect to the base portion 65 . Also, both ends of the slide rods 63 and 64 are prevented from slipping off from the base portion 65 .
  • FIG. 14 is a cross-sectional view taken along line XIV-XIV of FIG. 13.
  • the front cover portion 68 extends in the width direction.
  • the front cover portion 68 is supported by the base body 66 via the frame portion 67 .
  • a protruding portion 68A protruding rearward is formed in the center portion of the front cover portion 68 in the vertical direction.
  • a recessed portion 68B (see FIG. 13) recessed forward is formed in the central portion in the width direction of the projecting portion 68A.
  • Female screw holes 68C extending in the front-rear direction are formed on both sides in the width direction of the recess 68B.
  • a male screw portion 82A (see FIG. 14) of a pressure knob (pressure adjusting member, second fastening member) 82 is fastened to the female screw hole 68C. The pressing knob 82 is inserted through the insertion hole 66A of the base body 66 .
  • a pair of grooves 68D and 68E extending in the width direction are formed on the rear surface of the front cover portion 68 above and above the projecting portion 68A.
  • a pair of grooves 68D and 68E extending in the width direction are formed on the rear surface of the front cover portion 68 below the projecting portion 68A.
  • Each recessed groove 68D, 68E is recessed forward.
  • the first slide rods 63 are arranged in the lower recessed grooves 68D on the upper and lower sides of the projecting portion 68A.
  • a second slide rod 64 is arranged in the upper concave groove 68D.
  • a pressing portion 69 is arranged between the front cover portion 68 and the base body 66 .
  • the pressing portion 69 extends in the width direction.
  • the pressing portion 69 is formed with a recess 69A that is recessed rearward.
  • a projecting portion 68A of the front cover portion 68 is accommodated in the recess 69A.
  • the projecting portion 68A is accommodated in the recessed portion 69A with play in the front-rear direction.
  • a pair of through holes 69B are formed in the width direction of the recess 69A.
  • the through hole 69B has an inner diameter larger than that of the male threaded portion 82A of the pressing knob 82 .
  • the male screw portion 82A of the pressing knob 82 is inserted through the through hole 69B.
  • a large diameter portion 82B is formed in the pressing knob 82 corresponding to the position of the rear surface of the pressing portion 69 .
  • the large diameter portion 82B is formed to have an outer diameter larger than that of the through hole 69B of the pressing portion 69 . Therefore, when the pressing knob 82 is screwed into the female threaded hole 68C of the front cover portion 68, the large diameter portion 82B of the pressing knob 82 presses the pressing portion 69 forward.
  • pressing surfaces 69C are formed above and below the concave portion 67A.
  • the pressing surface 69 ⁇ /b>C comes close to the inner surface of the front cover portion 68 by screwing the male threaded portion 82 ⁇ /b>A, and presses the slide rods 63 and 64 toward the front cover portion 68 .
  • the positions of the slide rods 63 and 64 that are slidable in the width direction are fixed in the width direction.
  • the hook portions 61 and 62 of the connection portion 60 are engaged with the support frames 212 and 213 .
  • the hook portions 61 and 62 of the present embodiment are curved so as to be able to be hooked from the width direction to a rod-shaped member extending in the vertical direction.
  • the left and right positions of the hook portions 61 and 62 are adjusted by sliding the slide rods 63 and 64 with respect to the base portion 65 .
  • the hook portions 61, 62 are hooked on the support frames 121, 213 so as to sandwich the support frames 212, 213 corresponding to the rod-shaped members in the width direction by adjusting the left and right positions.
  • the slide rods 63 and 64 are fixed to the base portion 65 in this state, the left and right positions of the hook portions 61 and 62 are fixed and the hook portions 61 and 62 are connected to the support frames 212 and 213 .
  • the attachment 50 can be connected while adjusting the connection position of the connection portion 60 according to the attachment position on the push cart 200 side, specifically, the lateral width. Also, the attachment 50 can be removed from the push cart 200 by operating the push knob 82 to move the slide rods 63 and 64 . Since the attachment 50 of the present embodiment can easily adjust the spacing between the hook portions 61 and 62 in the width direction, the attachment 50 can be easily attached to articles having various lateral widths. Moreover, since the attachment 50 can be attached to articles having various lateral widths, the assist device 1 can be easily connected to articles having various lateral widths via the attachment 50 .
  • FIG. 15 is a left side view of the attachment 50 showing a state where the inserted portion 72 is held at the insertion position.
  • FIG. 16 is a left side view of the attachment 50 showing a state in which the inserted portion 72 is held at the retracted position.
  • the holder portion 70 has an insertion portion 71 that is substantially L-shaped when viewed from the side. The upper part of the insertion part 71 is inserted into the base part 65 from below. A threaded hole portion 71A (see FIG. 12) is formed in the upper portion of the insertion portion 71 so as to penetrate therethrough in the front-rear direction. A fixed knob 81 is engaged with the screw hole portion 71A.
  • the threaded portion of the fixed knob 81 is screwed into the threaded hole portion 71A through a hole provided on the back surface of the base body 66 .
  • the threaded portion of the fixed knob 81 can enter the recessed portion 68B of the front cover portion 68 when passing through the threaded hole portion 71A.
  • the holder portion 70 is detachably connected to the base portion 65 by the fixing knob 81 .
  • a hinge portion 71C (see FIG. 12) is formed at the bottom of the insertion portion 71 .
  • the hinge portion 71C has a stepped portion 71D whose rear upper portion is notched in a side view. In other words, the stepped portion 71D is cut out in an L shape.
  • the stepped portion 71D includes a first positioning surface 71D1 (see FIGS. 15 and 16) extending in the front-rear direction and a second positioning surface 71D2 (see FIGS. 15 and 16) extending in the vertical direction.
  • the stepped portion 71D is formed with a support piece portion 71E (see FIG. 12) having a shape projecting from the surfaces 71D1 and 71D2.
  • the support piece portions 71E are provided at intervals in the left-right direction.
  • the inserted portion 72 is rotatably supported by the support pieces 71E, 71E.
  • a concave portion 72B is formed on the lower surface of the inserted portion 72. As shown in FIG. The recessed portion 72B extends to the rear of the inserted portion 72 .
  • a protruding portion 72C is provided in the concave portion 72B.
  • the projecting portion 72C is formed at a position corresponding to the contact pin 44A1 (see FIG. 9).
  • a contact bolt 79 is screwed from the front to the projecting portion 72C. By screwing the abutment bolt 79, the amount of protrusion of the abutment bolt 79 with respect to the projecting portion 72C can be adjusted.
  • the rear end of the inserted portion 72 has rounded corners.
  • the inserted portion 72 is inserted into the insertion portion 51 through the insertion opening 12A1. Since the rear end has rounded corners, it is easy to insert the inserted portion 72 into the insertion opening 12A1.
  • a pair of lock holes (second holes) 72A in the width direction are formed in the inserted portion 72 .
  • the lock hole 72A penetrates vertically.
  • FIG. 17 is a bottom view of the attachment 50.
  • FIG. FIG. 18 is a vertical cross-sectional view showing the periphery of the operation member 74, showing a state in which the operation member 74 has moved to the fixed position.
  • FIG. 19 is a vertical cross-sectional view showing the periphery of the operating member 74, showing a state in which the operating member has moved to the release position.
  • a lever housing portion 71B recessed upward is formed in the lower portion of the insertion portion 71 .
  • An operating member 74 is arranged in the lever accommodating portion 71B.
  • the operation member 74 includes a lever portion 74A (see FIG. 17) having a substantially U-shaped cross section when viewed from the bottom.
  • a rotation restricting spring 75 is arranged between the operating member 74 and the insertion portion 71 .
  • the rotation restricting spring 75 is inserted into the lever accommodating portion 71B from the hinge portion 71C.
  • the rotation restricting spring 75 has a shaft tightening portion 75A with an annular cross section C that presses against the rotating shaft 73 .
  • the inner diameter of the shaft tightening portion 75A substantially matches the outer diameter of the rotating shaft 73 of the inserted portion 72 .
  • the inner peripheral surface of the shaft tightening portion 75A can come into contact with the outer peripheral surface of the rotating shaft 73 .
  • the inserted portion 72 can be rotated between the insertion position and the storage position. Further, by rotating the operating member 74 to the fixed position while the inserted portion 72 is moved to the insertion position or the retracted position, the inserted portion 72 can be fixed at those positions.
  • the hinge portion 71C of the insertion portion 71 has a stepped portion 71D, and positioning surfaces 71D1 and 71D2 (see FIGS. 15 and 16) are formed. Therefore, when rotating the inserted portion 72, the inserted portion 72 can be positioned at the insertion position and the retracted position by bringing the inserted portion 72 into contact with the positioning surfaces 71D1 and 71D2.
  • the attachment 50 includes a holder portion 70 and a connection portion 60 connected to the predetermined article 200 side
  • the connection portion 60 includes hook portions 61 and 62 corresponding to the connection end members
  • the hook portions 61 and 62 are configured such that the connecting position of the hook portions 61 and 62 can be changed according to the attachment position on the predetermined article 200 side.
  • the connecting portion 60 includes hook portions 61 and 62 provided at the left and right ends of the first slide rod 63 and the second slide rod 64, respectively. It has a variable length. According to this configuration, since the lengths of the slide rods 63 and 64 in the width direction can be changed with respect to the base portion 65, the left and right positions of the hook portions 61 and 62 can be changed, so that they can be connected to the predetermined article 200 having different left and right widths. can be done.
  • the hook portions 61 and 62 are provided with the hook portions 61 and 62 that can be hooked on the bar-shaped members 212 and 213 . According to this configuration, since the attachment 50 can be connected using the rod-shaped members 212 and 213 , the attachment 50 can be easily connected to various articles having the rod-shaped members 212 and 213 .
  • the holder portion 70 and the connection portion 60 are provided separately, and the holder portion 70 and the connection portion 60 can be integrally configured by the fixing knob 81 . According to this configuration, the holder portion 70 and the connection portion 60 can be separated by removing the fixing knob 81, so that the attachment 50 can be stored compactly.
  • the holder portion 70 includes an inserted portion 72 that is inserted into the insertion portion 51, and an insertion portion 71 that is connected to the connecting portion 60 and supports the inserted portion 72 in a rotatable manner. , provided. According to this configuration, since the inserted portion 72 can be rotated, the posture of the inserted portion 72 can be changed, and the storability of the attachment 50 can be improved.
  • the inserted portion 72 includes a rotating shaft 73 that rotates integrally
  • the insertion portion 71 includes a hinge portion 71C that rotatably supports the rotating shaft 73, and an operating member (cam member) 74 that allows or restricts the rotation of the shaft 73.
  • the operating member 74 includes an operable lever portion 74A. According to this configuration, by operating the lever portion 74A, it is possible to allow the rotation of the inserted portion 72 to change the rotational posture, or to fix the inserted portion 72, so that the storability of the attachment 50 is improved. can be enhanced.
  • a configuration was described in which the auxiliary wheel support member 30 is moved upward by the biasing force of the biasing member 25A.
  • a configuration may be adopted in which a sensor for detecting and an electric cylinder driven by the detection result of the sensor are provided, and the auxiliary wheel support member 30 is moved up and down by the electric cylinder.
  • An electric motor may be used instead of the electric cylinder.
  • the push cart 200 used when taking a walk is exemplified as an example of the predetermined article, but it may be a wheelchair or a cart for carrying luggage, for example.
  • the moving means is a foot pedal, but it may be a lever provided on the upper part of the main body 2 and pushed by hand.
  • tension spring 45 has been described as an example of the second biasing member in the above embodiment, it may be a compression spring.
  • the number of drive wheels 3 and the number of auxiliary wheels 4 of the assist device 1 are not limited to the numbers in the embodiment.
  • two drive wheels may be provided, or a pair of auxiliary wheels 4 may be arranged in front of the drive wheels 3 .
  • the connecting portion 60 is configured to be hooked across the push cart 200 from the width direction, but it is not limited to this.
  • the slide rods 63 and 64 may extend in the vertical direction so that the vertical positions of the hook portions 61 and 62 may be adjusted, and the push cart 200 may be sandwiched from the vertical direction and connected.
  • a configuration in which the slide rods 63 and 64 are arranged and connected in both the width direction and the vertical direction, that is, in a cross shape may be employed.
  • the assist device for applying an assist force for movement to a predetermined article when moving the predetermined article, includes a drive source that applies the assist force and a driving force of the drive source. and an inserting portion for inserting a holder portion which is a part of an attachment connected to the predetermined article, wherein the attachment includes the holder portion and a connecting portion connected to the predetermined article. and, wherein the connection portion includes a connection end member, and the connection end member is configured such that a connection position of the connection end member can be changed according to a mounting position on the side of the predetermined article.
  • An assist device characterized by: According to this configuration, it is possible to provide a highly versatile assisting device in which the connecting position can be easily changed according to the attachment position of the predetermined article to which the assisting force is to be applied.
  • (Arrangement 2) The assist device according to Arrangement 1, wherein the attachment is configured separately from a power unit having the drive source. According to this configuration, the assist device can be stored separately from the predetermined article when the assist device is not used.
  • connection portion includes a shaft portion and the connection end members provided at the left and right ends of the shaft portion, and the length of the shaft portion is variable.
  • connection end member has a hook portion that can be hooked on a rod-shaped member. According to this configuration, since the attachment can be connected using the rod-shaped member, the attachment can be easily connected to various articles having the rod-shaped member.
  • Configuration 5 Any one of configurations 1 to 4, wherein the holder portion and the connection portion are provided separately, and the holder portion and the connection portion can be integrally configured by a fastening member. Assist device as described. According to this configuration, the holder portion and the connection portion can be separated by removing the fastening member, so that the attachment can be stored compactly.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)
PCT/JP2021/047395 2021-12-21 2021-12-21 アシスト装置 WO2023119440A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2023568840A JP7690605B2 (ja) 2021-12-21 2021-12-21 アシスト装置
PCT/JP2021/047395 WO2023119440A1 (ja) 2021-12-21 2021-12-21 アシスト装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/047395 WO2023119440A1 (ja) 2021-12-21 2021-12-21 アシスト装置

Publications (1)

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WO2023119440A1 true WO2023119440A1 (ja) 2023-06-29

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JP (1) JP7690605B2 (enrdf_load_stackoverflow)
WO (1) WO2023119440A1 (enrdf_load_stackoverflow)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5288942A (en) * 1976-01-14 1977-07-26 Koretsuku Kk Freight cart
JPS5578562U (enrdf_load_stackoverflow) * 1978-11-25 1980-05-30
JP2006298157A (ja) * 2005-04-20 2006-11-02 Sanyo Electric Co Ltd カート用補助動力車
JP2014189073A (ja) * 2013-03-26 2014-10-06 Kayaba Ind Co Ltd 台車の駆動アシストユニット

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5288942A (en) * 1976-01-14 1977-07-26 Koretsuku Kk Freight cart
JPS5578562U (enrdf_load_stackoverflow) * 1978-11-25 1980-05-30
JP2006298157A (ja) * 2005-04-20 2006-11-02 Sanyo Electric Co Ltd カート用補助動力車
JP2014189073A (ja) * 2013-03-26 2014-10-06 Kayaba Ind Co Ltd 台車の駆動アシストユニット

Also Published As

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JP7690605B2 (ja) 2025-06-10
JPWO2023119440A1 (enrdf_load_stackoverflow) 2023-06-29

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