WO2012141212A1

WO2012141212A1 - Seat with wheels

Info

Publication number: WO2012141212A1
Application number: PCT/JP2012/059897
Authority: WO
Inventors: 伸幸板東
Original assignee: トヨタ車体株式会社
Priority date: 2011-04-13
Filing date: 2012-04-11
Publication date: 2012-10-18
Also published as: CN103561708B; JP2012217760A; JP5553054B2; CN103561708A

Abstract

Braking levers (76) are provided on rear wheel stays (42) that support the rear wheels (40). Said braking levers (76) are incorporated in braking devices (70) that function when the rear wheels (40) are in the use position and are equipped with braking parts (76b) as braking members. When the rear wheels (40) are stored in the upper storing position, the controlling parts (76c) of said braking levers (76) are configured so as to be pressed against the rear wheels (40) as controlling members to control the rotation of the rear wheels (40).

Description

Wheel seat

The present invention relates to a wheeled seat that can be used as a wheelchair outside a car.

A wheeled seat described in Japanese Patent Application Laid-Open No. 2005-034326 includes a seat body on which a user is seated and wheels provided on the front and rear of the seat body. The wheeled seat can be used as a wheelchair outside the passenger compartment, and when used as a wheelchair, the front and rear wheels can be moved to the upper deployed position. When a wheeled seat is installed in a vehicle interior and used as a vehicle seat, the front and rear wheels are stored in a lower storage position. By storing the wheel in the upper storage position, the seat body can be installed directly at the installation location in the vehicle interior without using the wheel. Thereby, the height which installs a sheet | seat main body can be made low. By aligning the height of the seating surface with the wheeled seat and the other seat, the user seated on the wheeled seat becomes the same height as the user seated on the other seat, and the feeling of alienation is reduced.

Generally, a wheel is provided with a bearing for receiving an axle and a gear for an electric motor. There is play in the bearings and gears, and the wheels can move in the range of play. Conventionally, the wheel does not contact the installation position when the seat is installed in the interior of the automobile. For this reason, the wheel may vibrate in the range of play between the bearing and the gear while the automobile is running, and may generate vibration noise.

Therefore, there is a need for a wheeled seat that can suppress the vibration of the wheel at the storage position.

According to one characteristic of the present invention, the wheeled seat can be used as a wheelchair outside the automobile, and includes a seat body, wheels, a storage permitting structure, and a regulating member. The wheels are arranged before and after the seat body. The retractable structure allows the wheel to move to the deployed position so that the seat is used as a wheelchair, and allows the wheel to move to the retracted position so that the seat is used as an automobile seat. The restricting member is provided on the seat body and restricts the rotation of the wheel at the retracted position.

Since the retractable structure allows the wheel to be stored in the storage position and the restriction member provided in the seat body restricts the rotation of the wheel stored in the storage position, the vibration of the wheel is suppressed.

It is a top view of the vehicle provided with the vehicle seat which concerns on embodiment of this invention. FIG. 2 is a side view of the automobile seat in the direction II of FIG. 1 when the wheeled seat is directed to the door opening. It is a side view of a car seat in a state where a wheeled seat is moved toward the outside of a passenger compartment by a third slide mechanism. It is a side view of a car seat in a state where a wheeled seat is lowered out of a passenger compartment by a second slide mechanism. FIG. 5 is a front view of the second slide mechanism, taken along line VV in FIG. 3. It is a side view near the 2nd slide base. It is a perspective view of the left four-joint link mechanism and the guide cam as seen from the seated person. It is a side view of a four-bar linkage mechanism and a guide cam. It is a side view of a 3rd slide mechanism and a wheeled seat. It is the front view which looked at the 3rd slide mechanism from the arrow X direction in FIG. It is a whole side view of a wheeled seat in the state separated from a sheet moving device. It is a perspective view of a sheet moving device. It is a perspective view of a sheet connection base. It is a top view of a seat frame. It is a side view of a seat frame, and is a longitudinal cross-sectional view of a left side frame part. It is a side view of the action | operation part of the brake device of the state which expand | deployed the wheel to the expansion | deployment position. It is a side view of the action | operation part of the brake device of the state which stored the wheel in the storing position. It is a side view which shows the connection state of the brake wire seen from the arrow XVIII direction in FIG. It is a side view of the lever part of a brake device. It is a side view of the brake device in a wheeled seat. It is a top view of the sheet | seat for motor vehicles which shows the state with which the sheet | seat with a wheel was connected with the sheet | seat connection base. It is a side view of the car seat which shows the state where the seat with wheels was connected with the seat connection base. FIG. 22 is a side view taken along the line XXIII-XXIII in FIG. 21, showing a state of engagement of the rear connection engagement member with the rear connection member. FIG. 22 is a side view taken along the line XXIV-XXIV in FIG. 21, showing a state in which the connecting convex portion of the second slide base has entered the connecting concave portion of the seat frame.

One embodiment for carrying out the present invention will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat 1 according to the present embodiment is a passenger seat of a vehicle M. Vehicle seats include seats other than passenger seats such as driver seats and second row seats of one-box cars.

The automobile seat 1 includes a wheeled seat 10 and a seat moving device 100 as shown in FIGS. The wheeled seat 10 includes front and rear wheels. The wheeled seat 10 can be used as a wheelchair on which a non-caregiver is seated outside the passenger compartment, and can be used as a seat for a passenger to sit inside the passenger compartment. The seat moving apparatus 100 can move the wheeled seat 10 from the vehicle interior to the vehicle interior or from the vehicle interior to the vehicle interior through the door opening K of the automobile M while the seated person is seated. The wheeled seat 10 is installed in the vehicle interior in a state of being connected to the seat moving device 100.

The sheet moving apparatus 100 includes a first slide mechanism 110, a rotation mechanism 120, an elevating mechanism 159, and a third slide mechanism 140, as shown in FIGS. The first slide mechanism 110 moves the wheeled seat 10 in the vehicle front-rear direction. The rotation mechanism 120 rotates the wheeled seat 10 between the vehicle front direction and the door opening direction which form approximately 90 °. The elevating mechanism 159 moves the wheeled seat 10 facing the door opening K downward while moving it toward the outside of the passenger compartment. The third slide mechanism 140 further moves the lowered wheeled seat 10 horizontally toward the outside of the passenger compartment.

The first slide mechanism 110 has a fixed base 111, a guide rail 112, and a first slide base 113 as shown in FIGS. The fixed base 111 is attached to the floor F of the automobile M. The guide rails 112 are attached to the upper surface of the fixed base 111 in the vehicle front-rear direction and in parallel with each other. The first slide base 113 is provided on the fixed base 111 so as to be slidable in the vehicle front-rear direction via the guide rail 112.

Between the fixed base 111 and the first slide base 113, a first slide motor 114a, a screw shaft 114b, and a nut 114c engaged with the screw shaft 114b are interposed. The first slide motor 114 a and the screw shaft 114 b are attached to the fixed base 111. The nut 114 c is attached to the first slide base 113. When the first slide motor 114a operates, the screw shaft 114b rotates. As a result, the first slide base 113 moves to the front or rear of the vehicle (in the direction perpendicular to the paper surface in FIGS. 2 to 4).

The rotation mechanism 120 includes the first slide base 113, an outer ring 121 and an inner ring 122 that are coaxially and rotatably combined with each other, and an intermediate base 131. The outer ring 121 is fixed to the upper surface of the first slide base 113, and the inner ring 122 is fixed to the lower surface of the intermediate base 131. On the upper surface of the first slide base 113, an electric motor for rotation driving (rotary motor 123) is attached. The rotation output from the rotary motor 123 is transmitted to the inner ring 122 via a gear transmission mechanism (not shown). As a result, the intermediate base 131, the lifting mechanism 159, and the wheeled seat 10 rotate together.

As shown in FIGS. 5, 6, and 7, the lifting mechanism 159 includes the intermediate base 131, the second slide mechanism 130, a pair of left and right four-bar linkage mechanisms 133, and a lifting base 135. ing.

The second slide mechanism 130 includes the intermediate base 131, a slide rail 160 attached to the intermediate base 131 in parallel with each other, and a second slide base 132 that can slide with respect to the intermediate base 131. The second slide base 132 is slidably supported via a slide rail 160. The slide rails 160 are positioned parallel to each other along the vehicle front-rear direction when the wheeled seat 10 faces the front of the vehicle, and when the wheeled seat 10 faces the door opening K, the slide rails 160 are arranged along the vehicle width direction. Located almost parallel. The second slide base 132 is rotatably provided with two guide rollers 161 on each side. Each guide roller 161 is supported by the slide rail 160 so as to be able to roll. Thus, the second slide base 132 is supported so as to be slidable with respect to the intermediate base 131.

A second driving device 170 is interposed between the intermediate base 131 and the second slide base 132. The second driving device 170 has a second slide motor 171 and a screw shaft 172. The second slide motor 171 is attached to the lower surface of the second slide base 132. The screw shaft 172 is rotatably supported on the lower surface of the second slide base 132. A nut 173 that meshes with the screw shaft 172 is attached to the upper surface of the intermediate base 131. For this reason, when the second slide motor 171 is rotated forward or reversely and the screw shaft 172 is rotated with the wheel seat 10 facing the door opening K, the second slide base 132 is moved outward or inward of the passenger compartment. Slide (to the left and right in FIGS. 2 to 4).

Each four-bar linkage mechanism 133 is attached to a side portion of the second slide base 132 as shown in FIGS. Each four-bar linkage mechanism 133 includes an inner link arm 133a and an outer link arm 133b. The inner and

outer link arms

133a and 133b are connected to the side portion of the second slide base 132 through

pivots

133c and 133d, respectively, so as to be rotatable up and down. As the second slide base 132 moves from the vehicle interior to the vehicle interior or vice versa, the left and right four-bar linkage mechanisms 133 move together as the second slide base 132 moves from the vehicle interior to the vehicle interior. The rotation front ends of the inner and

outer link arms

133a and 133b are rotatably connected to the side portion of the elevating base 135 via

support shafts

133e and 133f, respectively.

As shown in FIGS. 5 and 7, each inner link arm 133a has a structure in which two arm plates are fixed at left and right positions at a predetermined interval. Between the two arm plates, a guide roller 134 is rotatably attached at a position near the support shaft 133c. Each guide roller 134 is supported on the upper surface of a guide cam 139 attached to the left and right of the intermediate base 131 so as to be able to roll. On the upper surface of each guide cam 139, a substantially horizontal horizontal guide surface 139a and an inclined inclined guide surface 139b are formed. The inclined guide surface 139b is formed at the distal end portion of the guide cam 139 that faces the outside of the passenger compartment when the wheeled seat 10 faces the door opening K. The inclination of the inclined guide surface 139b is an inclination that goes down at the front end facing the outside of the passenger compartment.

At the stage where the guide roller 134 of the inner link arm 133a rolls along the horizontal guide surface 139a, the four-bar linkage mechanism 133 moves in a substantially horizontal state (without rotating up and down). Therefore, the elevating base 135 and the wheeled seat 10 move substantially horizontally without being displaced up and down. On the other hand, when the guide roller 134 rolls along the inclined guide surface 139b, the inner link arm 133a and the four-bar linkage mechanism 133 rotate upward or downward. Thereby, the elevating base 135 and the wheeled seat 10 are raised or lowered. FIG. 4 shows a state in which both the four-bar linkage mechanism 133 has moved to the outside of the passenger compartment and the wheeled seat 10 has been lowered to the lowest position.

As described above, the four-bar linkage mechanism 133 moves in the vehicle width direction while rotating up and down, so that the seating posture of the wheeled seat 10 is always maintained without tilting, and the inner and outer link arms 133a, The distance between fulcrums 133b is set appropriately. That is, the four-bar linkage mechanism 133 is a four-bar parallel link mechanism.

The 3rd slide mechanism 140 is arrange | positioned between the front-end | tip parts of the four-bar linkage mechanism 133 on either side, as FIG.9 and FIG.10 shows. The third slide mechanism 140 includes the above-described lifting base 135, a pair of left and right slide rails 141, and a seat coupling base 151. Each slide rail 141 is attached to the lower surface of the seat connection base 151. Two guide rollers 136 are rotatably attached to the left and right sides of the elevating base 135. Each guide roller 136 is supported on the slide rail 141 so as to be able to roll. Accordingly, the seat coupling base 151 is supported so as to be slidable with respect to the lifting base 135. The wheeled seat 10 is connected to the seat moving device 100 via the seat connection base 151.

A third driving device 150 is interposed between the elevating base 135 and the seat coupling base 151. The third driving device 150 includes a third slide motor 152 attached to the lower surface of the seat coupling base 151 and a screw shaft 153 that is rotated by the third slide motor 152. A nut 154 that engages with the screw shaft 153 is attached to the upper surface of the elevating base 135. Therefore, when the third slide motor 152 is activated and the screw shaft 153 is rotated with the wheel seat 10 facing the door opening K, the seat coupling base 151 is moved in the vehicle width direction (see FIG. 9). Therefore, the wheel seat 10 slides in the vehicle width direction in two stages by the second slide mechanism 130 and the third slide mechanism 140.

As shown in FIGS. 2, 3, 8, and 9, a pair of front main engagement portions 137 are provided at the front left and right positions of the lower surface of the elevating base 135. When the second slide base 132 and the four-bar linkage mechanism 133 are returned to the vehicle interior, the front main engagement portion 137 engages with the front end portion of the intermediate base 131 as shown in FIGS. To do. Thereby, the displacement of the raising / lowering base 135, the four-bar linkage mechanism 133, and the wheeled seat 10 in the lifting direction is restricted. However, the restriction by the front main engagement portion 137 functions only when the wheeled seat 10 moves in a direction different from the moving direction during normal use, such as when the vehicle receives a front collision. For this reason, the front main engagement portion 137 does not hinder the moving operation of the lifting base 135 by the lifting mechanism 159 during normal use of the automobile seat 1.

The wheeled seat 10 is detachably connected (mounted) to the upper surface of the seat connection base 151. The wheeled seat 10 can be used alone as a wheelchair outside the passenger compartment by being separated from the seat moving device 100. 11 and 12 show a state in which the wheeled seat 10 is separated from the seat moving device 100. FIG. Hereinafter, the wheeled seat 10 will be described.

The wheeled seat 10 includes a seat body 11, a pair of front wheels 30, and a pair of rear wheels 40, as shown in FIGS. The seat body 11 includes a seat cushion 11a, a seat back 11b, and a seat frame 20 that supports them. The pair of front wheels 30 and rear wheels 40 are provided symmetrically on the left and right of the seat frame 20. As shown in FIG. 20, a pair of handle portions 22 that are gripped when the caregiver moves the wheeled seat 10 are provided on the left and right of the upper portion of the seat back 11 b. A battery 26 for supplying electric power to an electric device such as a motor provided on the wheeled seat 10 is mounted on the back surface of the seat back 11b.

The front wheel 30 and the rear wheel 40 are provided so that they can be stored in the upper storage positions. FIG. 11 shows a support structure for the front and

rear wheels

30, 40 as viewed from the seated person.

Side frame portions

20L and 20R are provided on the left and right side portions of the seat frame 20 in parallel with each other. A front wheel stay 32 is supported on the front portions of the left and right

side frame portions

20L and 20R via a support shaft 31 so as to be vertically rotatable. A front wheel holder 33 that can swing freely is attached to the lower end of the front wheel stay 32. The front wheel 30 is rotatably supported by the front wheel holder 33. The left and right front wheel stays 32 are connected to each other by a connection bar (not shown). For this reason, the left and right front wheels 30 are integrally stored in the upper storage position and are deployed in the lower deployment position.

A rear wheel stay 42 is supported at the rear of both side portions of the seat frame 20 via a support shaft 41 so as to be rotatable up and down. The rear wheel 40 is rotatably supported by the rotating tip portion of the rear wheel stay 42. Similarly to the front wheel stay 32, the left and right rear wheel stays 42 are connected to each other by a connection bar (not shown). For this reason, the left and right rear wheels 40 are also integrally stored in the upper storage position and are deployed in the lower deployment position.

Each of the left and right rear wheels 40 incorporates an electric motor (hereinafter referred to as an in-wheel motor 45) that drives them. The rotation speed and rotation direction of each in-wheel motor 45 are controlled independently from each other by a control unit (not shown). When the in-wheel motor 45 drives the rear wheel 40, the wheeled seat 10 can be self-propelled. That is, the left and right rear wheels 40 are drive wheels. Further, the control unit independently controls the rotation speed and the rotation direction of both in-wheel motors 45, whereby the wheeled seat 10 can be moved forward, backward, and turned left and right. By operating an operation panel (not shown), these controls are performed through the control unit. The control unit is electrically connected to an in-wheel motor 45 for driving rear wheels, a battery 26 and an operation panel (not shown). When the operation panel is operated, the left and right in-wheel motors 45 are controlled to rotate independently from each other using the battery 26 as a power source by a control unit connected thereto.

A slide bracket 51 is provided on each of the left and right

side frame portions

20L and 20R of the seat frame 20 so as to be movable within a certain range along the

side frame portions

20L and 20R. A window portion 20a is provided on the lower surface of each

side frame portion

20L, 20R, and the slide bracket 51 protrudes downward through the window portion 20a.

The slide bracket 51 and the front wheel stay 32 are connected by a front wheel connecting arm 34. In other words, the front end portion of the front wheel connecting arm 34 is connected to the bracket portion 32a of the front wheel stay 32 via the support shaft 35 so as to be rotatable up and down. On the other hand, the rear end portion of the front wheel connecting arm 34 is connected to the slide bracket 51 via the support shaft 52 so as to be vertically rotatable. The slide bracket 51 and the rear wheel stay 42 are connected by a rear wheel connecting arm 43. In other words, the front end portion of the rear wheel connecting arm 43 is connected to the slide bracket 51 via the support shaft 52 so as to be vertically rotatable. On the other hand, the rear end portion of the rear wheel connecting arm 43 is connected to the upper portion of the rear wheel stay 42 via a support shaft 44 so as to be rotatable up and down.

As shown in FIG. 11, the support shaft 35 on the front side of the front wheel connection arm 34 is set on the rotation tip side of the support shaft 31 of the front wheel stay 32, and the support shaft 44 of the rear wheel connection arm 43 is The rear wheel stay 42 is set on the rotating front end side with respect to the support shaft 41. For this reason, as indicated by the solid line in the figure, when the slide bracket 51 moves to the front side (left side in the figure), the front wheel stay 32 and the rear wheel stay 42 rotate downward, thereby causing the front wheel 30 and The rear wheel 40 is deployed at the lower deployment position. Conversely, as indicated by a two-dot chain line in the figure, when the slide bracket 51 moves to the rear side (right side in the figure), the front wheel stay 32 and the rear wheel stay 42 rotate upward, thereby The front wheel 30 and the rear wheel 40 are stored in the upper storage position.

Storing the front wheel 30 and the rear wheel 40 allows them to be stored as much as possible within a range that does not disturb the seated person. Thereby, when the seat 10 with a wheel is moved to a vehicle interior, it can be installed lower. Therefore, since the so-called hip point of the seated person can be set low, the feeling of alienation experienced by the seated person in the passenger compartment can be eliminated.

As shown in FIG. 14, the seat frame 20 is provided with a wheel storage mechanism 50 for storing the front and

rear wheels

30, 40 to the storage position and for expanding them to the expansion position. The slide bracket 51 is moved back and forth by the wheel storage mechanism 50. The wheel storage mechanism 50 includes a drive motor 56 attached to the front portion of the seat frame 20 as a drive source. The drive motor 56 includes

output shafts

56a and 56b protruding in the left and right directions (lower and upper in FIG. 14). The left and

right output shafts

56a and 56b rotate forward or reverse integrally. Screw shafts 53 are arranged along the left and right

side frame portions

20L and 20R of the seat frame 20. The rotational power output from the left and

right output shafts

56a and 56b is transmitted to the left and right screw shafts 53 by the intermediate transmission block 57 attached to the front corner of the seat frame 20, respectively. Each screw shaft 53 is mounted with a nut block 55 engaged therewith.

A slider 60 is accommodated inside the left and right

side frame portions

20L and 20R of the seat frame 20 so as to be movable in the front-rear direction. The nut block 55 is fixed to the slider 60. A highly slidable liner 60a is interposed between the lower surface of the slider 60 and the lower portions of the

side frame portions

20L and 20R and between the upper surface of the slider 60 and the upper portions of the

side frame portions

20L and 20R. ing. By this liner 60a, both sliders 60 can move smoothly without rattling inside the

side frame portions

20L and 20R.

When the drive motor 56 is started and both the

output shafts

56a and 56b are rotated, the rotation output is transmitted to the screw shaft 53 through the intermediate transmission block 57, respectively. Thereby, both screw shafts 53 rotate in the forward and reverse directions in synchronization. As both screw shafts 53 rotate synchronously, both sliders 60 move together in the front-rear direction. Thereby, the slide bracket 51 moves back and forth within the range of the window portion 20a. As both slide brackets 51 move back and forth, the front and

rear wheels

30 and 40 are deployed to the deployed position and stored in the retracted position.

In this way, not only the front wheel 30 but also the rear wheel 40 is stored rearward with respect to the rotation support shaft 41 of the rear wheel stay 42, so that the front wheel 30 and the rear wheel 40 are respectively located in the longitudinal direction of the seat frame 20. It can be stored in the range from the rear to the rear. Thereby, since the front wheel 30 and the rear wheel 40 can be stored in a portion that is relatively unobtrusive when viewed from the seated person, they can be stored by being displaced to a position higher than the conventional one. Thereby, the storage space of the front and

rear wheels

30, 40 required below the seat frame 20 in the stored state can be made smaller than before.

Conventionally, the rear wheel has a configuration in which the rear wheel stay supported rotatably at the rear portion of the seat frame is rotated forward (in the clockwise direction in FIG. 11) and stored. It is configured to be stored in front of the moving support shaft, that is, in front of the seat frame. For this reason, the rear wheel cannot be stored at a very high position with respect to the seat frame because it is necessary not to obstruct the seated person when sitting or transferring. Therefore, it is necessary to store it while keeping it in a position that protrudes greatly below the seat frame, and as a result, a large storage space is required below the seat frame. In addition, since the rear wheel, which is usually set to have a larger diameter than the front wheel, is stored forward as viewed from the seated person, a large storage space under the seat frame is also required in this respect.

The stored front wheel 30 and rear wheel 40 are taken out downward when the drive motor 56 of the wheel storage mechanism 50 operates in the reverse direction. When the drive motor 56 rotates in the reverse direction, both the nut blocks 55 and the slider 60 move forward, whereby the slide bracket 51 moves forward. When the slide bracket 51 moves forward, both connecting

arms

34 and 42 move forward. As a result, the rear wheel stay 42 rotates downward about the support shaft 41, and the front wheel stay 32 rotates downward about the support shaft 31. Thus, the front and

rear wheels

30 and 40 are deployed at the lower deployment position.

Next, as shown in FIGS. 16 to 20, the wheeled seat 10 includes a brake device 70 that is used when used alone as a wheelchair outside the passenger compartment. The brake device 70 includes a seat body side mechanism 70A provided on the seat cushion 11a or the seat frame 20 side, and a wheel stay side mechanism 70B provided on the rear wheel stay 42 side. Of these, the seat main body side mechanism 70 A includes a lever portion 71 and a pair of left and right operating portions 72. Details of the lever portion 71 are shown in FIG. 19, and details of the operating portion 72 are shown in FIGS. 16 and 17.

First, the operation part 72 is provided in the same configuration at the rear part of the left and right

side frame parts

20L, 20R of the seat frame 20 corresponding to both the rear wheels 40. Below, the action | operation part 72 provided in the left side frame part 20L of the seat frame 20 is demonstrated. FIG. 16 shows the actuating portion 72 in a state where the wheel is deployed to the deployed position.

The operation lever 74 of the seat body side mechanism 70A is provided at the rear portion of the left frame portion 20L of the seat frame 20 so as to be rotatable up and down around the support shaft 75. In FIG. 16, the operating lever 74 located at the non-braking position is indicated by a solid line, and the operating lever 74 located at the braking position is indicated by a two-dot chain line. The actuating lever 74 is biased in a direction (counterclockwise direction in the drawing) that rotates from the braking position to the non-braking position by a torsion spring 75a as an urging member. The actuating lever 74 includes an input part 74 b that receives force from the

brake wires

78 and 79 and an actuating part 74 a that applies force to the brake lever 76 as transmission members.

On the other hand, on the upper part of the rear wheel stay 42, a brake lever 76 of the wheel stay side mechanism 70B is provided so as to be rotatable up and down around a support shaft 77. In FIG. 16, the braking lever 76 positioned at the non-braking position is indicated by a solid line, and the braking lever 76 positioned at the braking position is indicated by a two-dot chain line. The brake lever 76 is urged in a direction (clockwise direction in the drawing) to rotate from the brake position to the non-brake position by a torsion spring 77a as an urging member. The brake lever 76 includes a pin portion 76a as a transmission member that receives a force from the operation lever 74, a brake portion 76b as a brake member that is pressed so as to stop the rotation of the rear wheel 40 in the deployed position, and a rear portion in the retracted position. And a restricting portion 76c as a restricting member pressed against the rear wheel 40 so as to restrict the rotation of the wheel 40. The pin portion 76a projects from one end of the brake lever 76 inward in the seat width direction (the depth direction in the figure), and includes an operation portion 74a of the operation lever 74 and a pin portion 76a of the brake lever 76. Are in contact.

When the operating lever 74 rotates against the torsion spring 75 a toward the braking position side (clockwise direction in the drawing) around the support shaft 75, the operating portion 74 a of the operating lever 74 applies a force to the pin portion 76 a of the braking lever 76. . As a result, the braking lever 76 rotates against the torsion spring 77a to the braking position side (counterclockwise direction in the drawing) around the support shaft 77. As indicated by a two-dot chain line in the figure, when the operating lever 74 further rotates to reach the braking position, the braking lever 76 rotates to the braking position. The braking portion 76b of the braking lever 76 is pressed against the rear wheel 40, and a braking force for stopping the rotation of the rear wheel 40 is applied.

One end of each of the two

brake wires

78 and 79 is connected to the input portion 74b of the operating lever 74 as a transmission member of the brake device 70. One brake wire 78 is routed around the lever portion 71. The other brake wire 79 is connected to a brake lever 22a operated by a caregiver. The brake lever 22a is provided on the handle portion 22 described above. By operating the brake lever 22a, the rear wheel 40 can be braked. Both

brake wires

78 and 79 are inserted into the wire covers 78a and 79a. One end of each of the wire covers 78a and 79a is fixed to a fixing plate 20b provided on the left side frame portion 20L of the seat frame 20.

The lever portion 71 is provided at the front portion of the right frame portion 20R of the seat frame 20, and a brake lever 73 as an operation member is disposed at a position where the seated person can operate with the right hand. Reference numeral 80 in FIG. 19 indicates a lever portion base. The lever base 80 is fixed to the front portion of the right frame portion 20R. The lever lever 80 supports the brake lever 73 and the link lever 81. The brake lever 73 is rotatably supported by the lever base 80 via a support shaft 82. The brake lever 73 is biased by a torsion spring (not shown) in a non-braking position direction (clockwise in FIG. 19) that rotates in the forward direction of the seated person. On the other hand, the link lever 81 is rotatably supported by the lever base 80 via a support shaft 83 at the front portion (left side in FIG. 19) of the brake lever 73. The brake lever 73 and the link lever 81 are connected by a connecting lever 84. One end of the connecting lever 84 is rotatably connected to the link lever 81 via a support shaft 84a, and the other end is rotatably connected to the brake lever 73 via a support shaft 84b. A bracket portion 81 a is provided as a transmission member of the brake device 70 at the rotating tip portion of the link lever 81. The other end portion of the brake wire 78 routed from the operating portion 72 is connected to the bracket portion 81a. The other end portion of the wire cover 78 a through which the brake wire 78 is inserted is fixed to a bracket portion 80 a provided on the lever portion base 80.

When the brake lever 73 is tilted against the urging force of the torsion spring by manual operation from the non-braking position indicated by the solid line in FIG. 19 to the braking position indicated by the two-dot chain line, the support shaft 84b of the connecting lever 84 is It moves to the opposite side across the line L connecting the support shaft 82 and the support shaft 84a. In FIG. 19, a line connecting the support shaft 82 and the support shaft 84a after the brake lever 73 is tilted to the braking position is indicated by a reference numeral L '. In other words, each

support shaft

82, 83, 84a, 84b constitutes a so-called turnover mechanism. For this reason, when the brake lever 73 is tilted from the non-braking position to the braking position, the link lever 81 rotates to the left in FIG. 19 via the connecting lever 84, so that the brake wire 78 is pulled in the same direction. When the brake wire 78 is pulled, the operating lever 74 rotates in the clockwise direction in FIG. 16 against the torsion spring 75a. As a result, the braking portion 76b of the braking lever 76 is pressed against the rear wheel 40 as described above, and a braking force is applied to the rear wheel 40. This braking state is maintained when the brake lever 73 is locked at the braking position by the turnover mechanism.

The brake wire 79 as a transmission member connected to the left and right operating levers 74 is connected to a brake lever 22a provided at the upper back of the seat back 11b. For this reason, when the caregiver performs a braking operation on the left and right brake levers 22a with the hand holding the handle portion 22 (when the left and right brake levers 22 are turned counterclockwise in FIG. 20), both the brake wires 79 are pulled. The actuating lever 74 rotates in the clockwise direction in FIG. 16, so that a braking force is applied to the rear wheel 40. The seated person or the caregiver releases the tension of the brake wire 78 by tilting the brake lever 73 positioned at the braking position in the non-braking position direction (the front side when viewed from the seated person), and twists the operating lever 74. It can be returned to the position shown by the solid line in FIG. 16 by the spring 75a. As a result, the braking portion 76b of the braking lever 76 moves away from the rear wheel 40, resulting in a non-braking state in which the braking state of the rear wheel 40 is released.

FIG. 17 shows the operating portion 72 in a state where the rear wheel 40 is stored in the storage position. When the wheel storage mechanism 50 is activated and the rear wheel 40 is stored in the storage position, the brake lever 76 that has been in contact with the operation lever 74 follows the rotation of the rear wheel stay 42 as shown in FIG. The pin portion 76a of the brake lever 76 moves away from the operating portion 74a of the operating lever 74. That is, the transmission function from the seat main body side mechanism 70A including the actuating lever 74 to the wheel stay side mechanism 70B including the brake lever 76 is canceled, and the seat occupant or the caregiver operates any of the brake levers 73 and 22a. The wheel 40 is in a state where no braking force is applied. On the other hand, since the brake lever 76 is urged in the clockwise direction in the drawing as described above, it rotates in this urging direction, and the restricting portion 76c of the brake lever 76 is applied to the rear wheel 40 as shown in FIG. Pressed. That is, the torsion spring 77a always urges the braking lever 76 in a direction to press the braking lever 76 against the rear wheel 40. When the rear wheel 40 is stored in the retracted position, the torsion spring 77a receives the urging force of the torsion spring 77a. The state where the restricting portion 76c is pressed against the rear wheel 40 is maintained. In this way, when the restricting portion 76c of the brake lever 76 is pressed against the rear wheel 40, the rotation of the rear wheel 40 is restricted.

Conversely, when the wheel retracting mechanism 50 is activated to deploy the rear wheel 40 to the deployed position, the brake lever 76 moves clockwise in the figure around the support shaft 41 as the rear wheel stay 42 rotates, The operating portion 74 a of the operating lever 74 contacts the pin portion 76 a of the braking lever 76. That is, the transmission function from the seat main body side mechanism 70 A including the operation lever 74 to the wheel stay side mechanism 70 B including the brake lever 76 is restored. On the other hand, the brake lever 76 rotates counterclockwise in the figure against the urging force of the torsion spring 77a, and the restricting portion 76c of the brake lever 76 is separated from the rear wheel 40 as shown in FIG. That is, the operating portion 74 a of the operating lever 74 holds the restricting portion 76 c away from the rear wheel 40 via the pin portion 76 a of the braking lever 76.

As shown in FIGS. 15 and 22, a pair of front side connecting members 210 that project downward are provided at the left and right positions of the front portion of the lower surface of the seat frame 20. Corresponding to the front side connection member 210, a pair of front side connection engagement members 155 are provided at the left and right positions of the front portion of the upper surface of the sheet connection base 151, as shown in FIGS. The front connection member 210 is provided with an engagement groove 210a into which the corresponding front connection engagement member 155 can be fitted and engaged. The engaging groove 210a is formed by being cut in a substantially arcuate path from the lower part of the front side connecting member 210 to the front side obliquely upward. When the wheeled seat 10 is coupled to the seat coupling base 151, as shown in FIG. 22, the front coupling engagement member 155 is fitted into the engagement groove 210a, so that the sheet coupling base 151 of the wheeled seat 10 is fitted. The position in the front-rear direction with respect to is mainly regulated.

As shown in FIG. 21, a pair of rear connection members 211 are attached to the left and right positions of the rear portion of the lower surface of the seat frame 20. Corresponding to each rear connection member 211, a pair of rear connection engagement members 156 are provided on the rear surface of the upper surface of the sheet connection base 151, as shown in FIGS. 13 and 21. When the wheeled seat 10 is connected to the seat connection base 151, the rear connection engagement member 156 engages with the corresponding rear connection member 211, so that the wheeled seat 10 is mainly in the front-rear direction with respect to the seat connection base 151. The position of is regulated.

As shown in FIG. 7 and FIG. 22, a front engagement portion 201 is provided on the upper portion of the rotation tip portion (portion near the support shaft 133 f) of the link arm 133 b outside the four-bar linkage mechanism 133. . Corresponding to the front engagement portion 201, an arm engagement portion 210b that can be engaged with the front engagement portion 201 is provided at the rear portion of the front connection member 210 so as to protrude rearward.

As shown in FIGS. 7, 21, and 22, a rear engagement portion 200 is provided on the outer surface of the rotation base end portion (portion near the support shaft 133 d) of the outer link arm 133 b. As shown in FIG. 21, both the rear engagement portions 200 are provided symmetrically with each other. The rear engagement portion 200 extends in the direction of the turning tip of the outer link arm 133b. An engagement claw 200 a is formed at the lower end of each rear engagement portion 200. Corresponding to the rear engagement portion 200, engagement holes 61 that can be engaged with the rear engagement portion 200 are provided at positions near the rear end of the bottom portion of the slider 60.

Furthermore, a connecting recess 212 is provided between the rear connecting members 211 at the rear portion of the lower surface of the seat frame 20. Corresponding to the connection recess 212, a connection convex portion 213 that can enter the connection recess 212 is provided at the center of the second slide base 132.

When the wheeled seat 10 is coupled to the seat coupling base 151 of the seat moving device 100, the front coupling engagement member 155 is fitted into the engagement groove 210a of the front coupling member 210 as described above, and the rear coupling member The rear connection engaging member 156 engages with 211. As a result, the wheeled seat 10 is positioned mainly in the front-rear direction with respect to the seat coupling base 151, and the relative displacement in the same direction is restricted.

When the second slide base 132 is moved backward in the vehicle interior direction by the second slide mechanism 130 in this connected state, the four-bar linkage mechanism 133 is retracted while being tilted upward, and the vehicle seat 10 is lifted while the wheeled seat 10 is raised. Returned in the direction. After the second slide base 132 reaches the retracted end in the vehicle interior direction, the third slide mechanism 140 causes the seat coupling base 151 to retract relative to the lift base 135 in the vehicle interior direction. When the seat connection base 151 is moved backward, the wheeled seat 10 moves toward the vehicle interior with respect to the second slide base 132 and the four-bar linkage mechanism 133. FIG. 22 shows a state in which the wheeled seat 10 has moved. At this time, the arm engaging portion 210b of the front side connecting member 210 engages with the front side engaging portion 201 of the outer link arm 133b. Further, the rear engagement portion 200 enters the slider 60 from behind. Further, the connecting convex portion 213 of the second slide base 132 enters the connecting concave portion 212.

When the arm engaging part 210b engages with the front engaging part 201, the front part of the seat cushion 11a with the wheel, in particular, the seat cushion 11a is restricted from being lifted from the seat moving device 100. Thus, for example, even when a large inertial force acting in the direction of lifting the front portion of the seat cushion 11a is applied to the wheel seat 10 due to a large impact load generated when the vehicle receives a rear impact, for example, The displacement of the sheet 10 (the inclination in the backward inclination direction) can be reliably regulated.

When the rear engagement portion 200 enters the slider 60, the rear portion of the seat cushion 11a in the wheeled seat 10 is restricted from being lifted from the seat moving device 100. Thereby, for example, even when a large inertial force acts on the wheel seat 10 in the direction of lifting the rear portion of the seat cushion 11a due to a large impact load generated when the vehicle receives a front collision, the wheel seat 10 displacements (tilt in the forward tilt direction) can be reliably regulated.

Each pair of the arm engaging portion 210b and the front engaging portion 201, the slider 60 and the rear engaging portion 200, and the connecting concave portion 212 and the connecting convex portion 213 are in contact with each other, with a slight gap therebetween. It will be in the state that is located. In the latter state, the wheeled seat 10 comes into contact only when it is slightly displaced in a direction different from the moving direction in a normal use state due to a large inertial force or vehicle vibration. For this reason, in a normal use state, they do not interfere with each other, and the smooth movement of the wheeled seat 10 with respect to the seat moving device 100 is performed.

As shown in FIG. 13, a male-side power connector 158 is disposed on the upper surface of the sheet connection base 151. Corresponding to the male-side power connector 158, a female-side power connector 25 is disposed on the lower surface side of the seat frame 20 of the wheeled seat 10 as shown in FIG. When the wheeled seat 10 is coupled to the seat coupling base 151 of the seat moving device 100, the male power connector 158 and the female power connector 25 are electrically connected. When the male power connector 158 and the female power connector 25 are connected, power is supplied from the seat moving device 100 side to the wheeled seat 10 side. The supplied electric power activates an electric device such as the wheel storage mechanism 50 included in the wheeled seat 10 and charges the battery 26 mounted on the back surface of the seat back 11b.

Next, as shown in FIGS. 12, 21, and 22, a front wall portion 21 that straddles between the front end portions of the left and right side frame portions 20 L and 20 R is provided at the front portion of the wheeled seat 10. . A buffer block 23 is attached to each of the left and right positions on the rear surface of the front wall portion 21. A footrest 27 on which a seated person puts his / her foot is provided at each of the left and right positions on the front surface of the front wall portion 21. As shown in FIG. 22, the rear surface (contact surface) of each buffer block 23 is inclined so that the protruding size from the front wall portion 21 toward the rear becomes smaller toward the upper portion. On the other hand, a pair of contact protrusions 157 are attached to the left and right positions of the front surface of the seat connection base 151 corresponding to the buffer block 23. Elastic rubber is used for both contact protrusions 157.

FIG. 11 shows a state in which the wheeled seat 10 used as a wheelchair outside the passenger compartment moves backward and approaches the seat coupling base 151. When the wheeled seat 10 is further retracted from the approaching state and the seat coupling base 151 is relatively moved toward the lower side of the seat frame 20, each abutment convex portion 157 comes into contact with the corresponding buffer block 23. As a result, the wheeled seat 10 is temporarily positioned with respect to the seat connecting base 151 in the longitudinal direction of the seat. When the seat connection base 151 rises from the temporary positioning state, the wheeled seat 10 is connected to the seat connection base 151.

The user (a seated person, a caregiver, etc.) of the vehicle seat 1 can use the wheeled seat 10 as a wheelchair outside the vehicle interior by moving the wheel seat 10 from the vehicle interior to the vehicle interior in the following procedure. When the seat body 11 is facing the front of the vehicle in the vehicle interior such as when the vehicle is running, the seat coupling base 151 is positioned at the retracted end with respect to the lifting base 135 in the third slide mechanism 130.

At this time, the front main engagement portion 137 of the elevating base 135 is engaged with the front end of the intermediate base 131, and the arm engagement portion 210b of the wheeled seat 10 is the front engagement portion 201 of the outer link arm 133b. Is engaged. As a result, for example, even when a large impact load is applied to the seat body 11 due to the rear impact of the vehicle, the front portion of the wheeled seat 10 is restricted from being lifted from the seat moving device 100. Thereby, it is suppressed that the seated person of the seat main body 11 inclines backward.

At this time, the rear engaging portion 200 of the outer link arm 133b has entered the slider 60, and the connecting projection 213 of the second slide base 132 has entered the connecting recess 212. Thus, for example, even when a large impact load (so-called seat belt load) is applied to the seat body 11 due to a frontal collision, the rear portion of the wheeled seat 10 is restricted from being lifted from the seat moving device 100. Accordingly, the front turning of the seat body 11 to the seated person is suppressed.

On the other hand, the movement of the seat coupling base 151 and the seat body 11 (the wheeled seat 10) outward in the vehicle width direction (moving forward as viewed from the seated person) is allowed. In particular, the engaging claw 200 a of the rear side engaging portion 200 that has entered the slider 60 is not engaged with the slider 60. For this reason, at the time of normal use in which an impact load is not applied to the seat body 11, the seated person or the caregiver can perform the moving operation of the wheeled seat 10 without performing any special unlocking operation. The engaging claw 200a engages with the engaging hole 61 of the slider 60 only after an impact load is applied to the sheet main body 11 and the rear portion of the sheet main body 11 is lifted, and the displacement of the sheet main body 11 in an inappropriate direction is ensured. regulate.

First, the first slide motor 114a of the first slide mechanism 110 is operated to move the seat body 11 forward of the vehicle. At the same time, the rotation motor 123 of the rotation mechanism 120 is operated to rotate the seat body 11 until it faces the door opening K as shown in FIG.

Next, the third slide motor 152 of the third slide mechanism 140 is actuated to slide the seat connection base 151 outward from the passenger compartment. As a result, the seat body 11 moves horizontally outward from the passenger compartment and reaches the state shown in FIG.

Next, the second slide motor 171 of the second slide mechanism 130 is operated to move the second slide base 132 outward from the passenger compartment. As a result, the four-bar linkage mechanism 133 moves outward from the passenger compartment. At this time, the guide roller 134 attached to the inner link arm 133a rolls on the inclined guide surface 139b of the guide cam 139, so that the four-bar link mechanism 133 moves not only outside the vehicle compartment but also downward (FIG. 4). Tilts counterclockwise). As a result, the elevating base 135 and the wheeled seat 10 move out of the passenger compartment as shown in FIG. 4 and descend to a position lower than the position in the passenger compartment.

Next, the wheel retracting mechanism 50 in the wheeled seat 10 is operated, and the front and

rear wheels

30 and 40 are deployed to the lower deployment position. At this time, the operation transmission functions of the seat body side mechanism 70A and the wheel stay side mechanism 70B of the brake device 70 are linked.

Next, the second slide base 132 is further moved outward from the passenger compartment, and the elevating base 135 is further lowered to lower the wheeled seat 10 so that the front and

rear wheels

30 and 40 are grounded. Next, when the elevating base 135 is further lowered, the seat coupling base 151 is detached downward from the seat frame 20. As a result, the wheeled seat 10 is separated from the seat moving device 100.

The wheeled seat 10 separated from the seat moving device 100 can be used as a wheelchair. The wheeled seat 10 can be driven by driving the rear wheel 40 by operating the operation panel. When used as a wheelchair, the brake device 70 can be operated by tilting the brake lever 73 forward while the seated person is sitting. When the seated person tilts the brake lever 73 forward, the brake wire 78 is pulled and the operation lever 74 rotates. As the operation lever 74 rotates, the brake lever 76 rotates and is pressed against the rear wheel 40 to apply a braking force to the rear wheel 40 (a brake is applied). When the brake lever 73 is locked at the braking position by a so-called turnover mechanism, the braking state of the rear wheel 40 is maintained. When the seated person returns the brake lever 73 to the near side, the brake wire 78 is loosened, and the operating lever 74 and the brake lever 76 are returned to the non-braking position by the biasing force of the respective torsion springs 77a. Thereby, the rear wheel 40 is allowed to rotate, and the wheeled seat 10 can be moved.

A handle portion 22 that is gripped when the caregiver moves the wheeled seat 10 is provided at each of the left and right positions on the upper back of the seat back 11b. Each handle portion 22 is equipped with a brake lever 22a. The brake lever 22 a is connected to the operating lever 74 via a brake wire 79. The operating lever 74 can also be operated by the caregiver operating the brake lever 22a, whereby the rear wheel 40 can be braked.

For example, when the carer moves the wheeled seat 10 as a wheelchair in a direction to go down a slope, the caregiver adjusts the force of pressing the brake lever 76 against the rear wheel 40 by operating the brake lever 22a with an appropriate force. The wheeled seat 10 can be moved slowly. Furthermore, the caregiver can rotate the left and right rear wheels 40 at different rotational speeds by operating the left and right brake levers 22a with different magnitudes of force, thereby changing the traveling direction of the wheeled seat 10. Can do.

The user can return the wheeled seat 10 used as a wheelchair to the passenger compartment by the following procedure. First, the seat connection base 151 of the seat moving device 100 is moved to the lowest position outside the passenger compartment, and the wheeled seat 10 is moved backward to approach the seat connection base 151.

Next, the wheeled seat 10 is further retracted, and the seat connection base 151 is relatively entered below the seat frame 20. When the seat coupling base 151 enters between the positioning wall portions 28 (see FIG. 12) of the seat frame 20, the wheeled seat 10 is positioned with respect to the seat coupling base 151 in the left-right direction as viewed from the seated person. When the seat connection base 151 reaches almost directly below the seat frame 20, a temporary positioning state in which the contact protrusion 157 comes into contact with the buffer block 23 is brought about.

Next, the seat connecting base 151 is slightly raised by retreating the second slide base 132 in this state. As a result, the seat connection base 151 gradually approaches the seat frame 20. At this time, the front ends (seat connection base 151) of both the four-bar linkage mechanisms 133 are displaced along an arcuate locus. The rear surface of the buffer block 23 with which the abutting convex portion 157 abuts is inclined so that the protruding dimension becomes smaller toward the upper part, and the engaging groove 210a into which the front side coupling engaging member 155 enters is along an arcuate path. Is formed. For this reason, when the seat coupling base 151 is raised, the horizontal displacement of the seat coupling base 151 with respect to the wheeled seat 10 is allowed.

When the seat connection base 151 approaches the seat frame 20, the front side connection engagement member 155 reaches the inner part of the engagement groove 210a. Further, when the rear connection engagement member 156 provided on the seat connection base 151 side is engaged with the rear connection member 211 of the rear portion of the seat frame 20, the wheeled seat 10 is mainly moved in the front-rear direction with respect to the seat connection base 151. Connected in a positioned state. At this time, the female-side power connector 25 is connected to the male-side power connector 158, whereby power is supplied to the wheeled seat 10.

Next, when the second slide base 132 is further retracted toward the vehicle interior, both the four-bar linkage mechanisms 133 are returned to the vehicle interior while being tilted upward. Thereby, the seat 10 with a wheel raises.

Simultaneously, the wheel retracting mechanism 50 is operated to move the slider 60 in the rearward direction of the wheeled seat 10 (rightward in FIG. 11). Thereby, the slide bracket 51 moves together with the slider 60 in the rearward direction of the wheeled seat 10, and the front wheel connecting arm 34 and the rear wheel connecting arm 43 are also displaced in the rearward direction. As a result, the front wheel stay 32 rotates upward and the front wheel 30 is stored in the storage position, and the rear wheel stay 42 rotates upward and the rear wheel 40 is stored in the storage position. In FIG. 11, the stored front and

rear wheels

30 and 40 are indicated by a two-dot chain line.

At this time, as the rear wheel stay 42 rotates, the operation transmission function from the seat body side mechanism 70A of the brake device 70 to the wheel stay side mechanism 70B is released. Further, the brake lever 76 of the wheel stay side mechanism 70B is pressed against the rear wheel 40 by the urging force.

The wheeled seat 10 continues to rise after the front and

rear wheels

30 and 40 are completely stored, thereby reaching the rising end as shown in FIG. At this time, the second slide base 132 reaches the retracted end on the vehicle interior side, and thus both the four-bar linkage mechanism 133 reaches the retracted end.

Next, the third slide motor 152 of the third slide mechanism 140 is operated in the reverse direction to slide the seat coupling base 151 toward the lift base 135 toward the vehicle interior. As a result, the seat body 11 is returned horizontally toward the vehicle interior. At this time, the arm engaging portion 210b is engaged with the front engaging portion 201 of the outer link arm 133b, and the rear engaging portion 200 enters from the rear portions of both sliders 60, respectively.

At this time, as shown in FIG. 22, the engagement claw 200 a of the rear engagement portion 200 does not yet engage with the engagement hole 61 provided in the slider 60, but the third slide mechanism 140. The slide operation by is allowed. Further, when the wheeled seat 10 is returned horizontally toward the vehicle interior by the third slide mechanism 140, the connecting convex portion provided on the second slide base 132 is provided in the connecting concave portion 212 provided on the rear portion of the seat frame 20. 213 enters the state.

Thus, when the wheeled seat 10 is returned to the vehicle interior, the arm engaging portion 210b of the front connecting member 210 is engaged with the front engaging portion 201 of the outer link arm 133b. Thereby, the displacement of the front-side lifting direction of the wheeled seat 10 is regulated.

Also, when the rear engagement portion 200 enters from the rear portion of the slider 60, the displacement of the wheel seat 10 mainly in the rearward direction is restricted. Thereby, when a large impact load (seat belt load) is applied to the seat main body 11 such as when the vehicle receives a front collision, the displacement in the lifting direction from the seat main body 11 and the seat occupant's seat moving device 100 is restricted. Is done.

After the wheeled seat 10 is returned to the vehicle interior, the rotation motor 123 rotates reversely, and the first slide motor 114a operates in the reverse rotation direction, so that the seat body 11 slides toward the rear side of the vehicle, thereby opening the door opening. It is rotated from the direction toward K to the direction toward the front of the vehicle. When the seat body 11 is directed to the front of the vehicle and returned to the rear end position of the sliding range in the vehicle front-rear direction, the operation of returning the wheeled seat 10 to the vehicle interior is completed.

As described above, the wheeled seat 10 includes the seat body 11 and the rear wheels 40 (wheels) disposed in front of and behind the seat body 11, and can be used as a wheelchair outside the vehicle compartment. Furthermore, the wheeled seat 10 has a storage allowing structure for allowing the rear wheel 40 to move to the storage position, and when the wheeled seat 10 is used as a car seat, the rear wheel 40 can be moved to the storage position. When used as a wheelchair, it can be moved to the deployed position.

The wheeled seat 10 includes a regulating portion 76c (regulating member) provided in the seat body 11. The restricting portion 76c (the restricting member) restricts the rotation of the rear wheel 40 moved to the storage position. Thereby, generation | occurrence | production of the vibration of the rear-wheel 40 is suppressed. Therefore, even when the wheeled seat 10 is installed in the passenger compartment of the automobile and used as the automobile seat 1, the generation of vibration noise from the rear wheel 40 during the traveling of the automobile is suppressed, and discomfort that can be given to passengers. Can be reduced.

The regulating portion 76c regulates the rotation of the rear wheel 40 by coming into contact with the stored rear wheel 40. Therefore, it is possible to suppress the vibration of the rear wheel 40 by a simple means of contacting the restricting portion 76c.

A brake device 70 having a function of applying a braking force to the rear wheel 40 in the deployed position is provided on the seat body. The restricting portion 76c is incorporated in the brake device 70 as a part of the brake lever 76 that is a functional member of the brake device 70, and has a holding structure provided in the brake device 70 when the rear wheel 40 is in the retracted position. It is held at a position where it abuts against the rear wheel 40. Therefore, the restriction part 76c and the existing brake lever 76 can be shared.

The restricting portion 76c is held at a position away from the rear wheel 40 by the holding structure when the rear wheel 40 is in the deployed position. For this reason, when using the wheeled seat 10 as a wheelchair, the restricting portion 76 c does not interfere with the rotation of the rear wheel 40.

When the rear wheel 40 is in the retracted position, a torsion spring 77a that urges the restricting portion 76c in a direction to contact the rear wheel 40 is provided. That is, the restricting portion 76c is biased by the torsion spring 77a, and when the rear wheel 40 is stored in the retracted position, the braking lever 76 is pressed against the rear wheel 40 by this biasing force. Therefore, the generation of vibration noise from the rear wheel 40 can be suppressed by using the urging force applied to the restricting portion 76c.

The rear wheel 40 is provided with an in-wheel motor 45 (drive source), and is a drive wheel that is driven by the in-wheel motor 45 when in the deployed position. Therefore, vibration generated from the in-wheel motor 45 can be suppressed when the rear wheel 40 is in the retracted position. The vibration may be generated by the presence of backlash (play) set on the gears of the in-wheel motor 45. Since the vibration caused by the backlash is a slight vibration, in order to suppress this, the restricting portion 76c does not necessarily have to be pressed against the rear wheel 40, and may simply be brought into contact therewith.

Although the embodiment of the present invention has been described with reference to the above-described structure, it will be apparent to those skilled in the art that many substitutions, improvements, and changes can be made without departing from the object of the present invention. Accordingly, aspects of the invention may include all alterations, modifications, and variations that do not depart from the spirit and scope of the appended claims. For example, the form of the present invention is not limited to the special structure described above, and can be modified as follows.

The wheeled seat 10 can be configured not only to move between the interior and exterior of the vehicle interior by the seat moving device 100 but also to be installed in the vehicle interior by human work.

Storing and removing the front and

rear wheels

30 and 40 may be not only an electric retractable type that electrically operates the slide bracket 51 using the wheel retracting mechanism 50 but also a manually retractable type that manually operates the slide bracket 51.

The front wheel connecting arm 34 and the rear wheel connecting arm 43 are illustrated as being configured to be connected to the common slide bracket 51, but are configured to be connected to two slide brackets provided at intervals before and after the slider 60. Also good. For example, the front wheel connecting arm can be pivotally connected to the front slide bracket, and the rear wheel connecting arm 43 can be pivotally connected to the rear slide bracket.

The wheels used as drive wheels may be configured not only to be directly driven by an in-wheel motor, which is a built-in electric motor, but also to be indirectly driven by a power transmission mechanism. The power transmission mechanism can include, for example, an axle that serves as a common rotating shaft for both the left and right wheels, and a gear train that transmits power from the electric motor to the axle.

Regarding the brake device 70, the operation lever 74 and the brake lever 76 may be configured to be slidable linearly as well as a configuration that allows rotation between the non-braking position and the braking position. In the latter case, for example, when the operating lever slides to the braking position side, it comes into contact with the braking lever, and when the operating lever slides further to the braking position side, the braking lever receives the force and slides to the braking position side and pushes it to the rear wheel. The configuration can be applied. The actuating lever and the braking lever can be configured to be biased so as to slide to the non-braking position by a biasing member such as a spring.

The transmission member between the brake lever 73 and the operation lever 74 in the seat body side mechanism 70A may be not only the brake wire 78 but also a belt, a chain, a rod, or a link lever. The brake lever 73 is not only configured to be provided separately from the operating lever 74 via the transmission member, but is also formed integrally with the operating lever 74 so that the user can operate the operating lever 74 substantially directly. Also good.

The brake lever 76 of the wheel stay side mechanism 70B is not limited to being directly pressed against the wheel, but may be configured to be indirectly pressed through another member such as a brake pad.

Similarly to the brake lever 76 of the rear wheel 40, by setting a brake lever that is pressed against the front wheel 30, the rotation of all the front and

rear wheels

30, 40 can be stopped. Further, a configuration in which a braking lever is provided only for the front wheel 30 can also be adopted.

The brake device 70 may have a so-called disc brake configuration including a disk that rotates integrally with the wheel. The braking of the rotation of the wheel can be performed by a braking member such as a braking lever being pressed against the disc or sandwiched.

The restricting portion 76c is not only configured to be integrally formed as a part of the braking lever 76 (the restricting portion 76c) together with the braking portion 76b, but is also configured as a part of the operating lever 74 that is a transmission member. Also good. The actuating lever 74 can be configured to be moved by an urging member such as a torsion spring 75a and pressed against the wheel.

The restricting member is not limited to the structure that is integrally incorporated as a part of the functional members (brake lever 76, operating lever 74, etc.) of the brake device 70, and is not related to the function of the brake device 70, such as the seat frame 20. It can also be set as the structure formed as a member or its part.

A detection device for detecting the storage state of the wheel is provided in the seat 10 with the wheel, and an actuator for moving the regulating member and pressing the wheel against the wheel is provided in the seat body 11, and the detection device detects that the wheel is in the storage position. It may be configured to operate sometimes. The detection device includes a detection switch and a detected member attached to one and the other of the seat frame 20 and the wheel stays 32 and 42, respectively, and the detection switch detects the detected member when the wheel moves to the storage position. can do.

As long as the rotation of the wheel can be restricted, the restricting member may be configured to simply abut in addition to the structure pressed against the wheel. Moreover, it can also be set as the structure which regulates rotation of a wheel by providing the disc which rotates integrally with a wheel, and a control member pinching | interposing a disc.

The regulating member may be configured to regulate the rotation of not only the rear wheel 40 but also the front wheel 30 or the front and

rear wheels

30 and 40.

The wheel whose restriction member restricts the rotation does not necessarily have to be a drive wheel driven by a power source such as an in-wheel motor. For example, when the wheel includes an axle and a bearing that receives the axle, the rattling of the wheel within the range of play that exists between the axle and the bearing can be restricted by the restricting member. That is, the rattling of the wheel that can be regulated may be not only in the rotational direction but also in the radial direction and the rotational axis direction.

Claims

A wheeled seat that can be used as a wheelchair outside a car,
The seat body,
Wheels disposed before and after the seat body;
A storage allowing structure for allowing the wheel to move to a deployed position so as to use the seat as the wheelchair and to allow the wheel to move to a retracted position so as to use the seat as a seat of the automobile;
A wheeled seat provided with a restricting member provided on the seat body and restricting the rotation of the wheel at the retracted position.
The wheeled seat according to claim 1,
The restriction member is a wheeled seat that restricts rotation of the wheel by contacting the wheel.
The wheeled seat according to claim 2,
A brake device provided on the seat body and applying a braking force to the wheel at the deployed position;
The brake device holds the restricting member and the restricting member when the wheel is in the retracted position and holds the restricting member at a position away from the wheel when the wheel is in the deployed position. A wheeled seat provided with a holding structure that holds it at a position where it abuts against the wheel.
The wheeled seat according to claim 3,
The brake device is a wheeled seat including a braking member that is formed integrally with the restriction member and that applies a braking force to the wheel when the wheel is in the deployed position.
The wheeled seat according to any one of claims 2 to 4,
A wheeled seat provided with a biasing member that biases the restricting member in a direction in contact with the wheel when the wheel is in the retracted position.
The wheeled seat according to any one of claims 1 to 5, further comprising a drive source for driving the wheel at the deployed position.