Wheelchair fixing device

Abstract

To provide a wheelchair fixing device capable of releasing fixation of a wheelchair in emergency.SOLUTION: A wheelchair fixing device 1 includes a base part 11, a slide part 22, a hook part 23, a drive mechanism 24, and a detachable connection part 25. The slide part 22 is slidably mounted on the base part 11. The hook part 23 rotates relative to the base part 11 as the slide part 22 slides relative to the base part 11, and locks the anchor bar 140 of the wheelchair 100. The drive mechanism 24 slides the slide part 22. The detachable connection part 25 detachably connects the drive mechanism 24 to the slide part 22. In a state where connection with the slide part 22 of the drive mechanism 24 is released in the detachable connection part 25, the locking of the anchor bar 140 by the hook part 23 can be released.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a wheelchair fixing device.

Background Art

[0002] A welfare vehicle that can accommodate a wheelchair is provided with a fixing device for fixing the wheelchair. The fixing device fixes the wheelchair by locking it with a hook device (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the hook device is driven by an electric motor or the like to lock the wheelchair, there is a risk that the locking cannot be released in an emergency such as a power failure. Therefore, in an emergency, it is required to manually release the locking of the wheelchair by the wheelchair fixing device.

[0005] An object of the present invention is to provide a wheelchair fixing device capable of releasing the fixation of a wheelchair in an emergency.

Means for Solving the Problems

[0006] The wheelchair fixing device according to the first aspect of the present invention includes a base portion, a slide portion, a locking portion, a drive mechanism, and a detachable connecting portion. The slide portion is slidably attached to the base portion. The locking portion rotates with respect to the base portion by the sliding movement of the slide portion with respect to the base portion, and locks the locked portion of the wheelchair. The drive mechanism slides the slide portion. The detachable connecting portion detachably connects the drive mechanism to the slide portion. In a state where the connection between the drive mechanism and the slide portion in the detachable connecting portion is removed, the locking of the locked portion by the locking portion can be released.

Effects of the Invention

[0007] According to the present invention, it is possible to provide a wheelchair fixing device capable of releasing the fixation of the wheelchair in an emergency.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3A

Figure 3B

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8A

Figure 8B

Figure 8C

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0009] Hereinafter, the wheelchair fixing device of the embodiment concerning this invention will be described.

[0010] (Outline of Wheelchair Fixing Device 1) FIG. 1 is a figure which shows the wheelchair 100 which can be fixed by the wheelchair fixing device 1. FIG. 2 is a figure which shows an example of the vehicle 200 equipped with the wheelchair fixing device 1. In this embodiment, the front - rear direction of the vehicle 200 is shown by X, the front direction among the front - rear direction X is shown by X1, and the rear direction is shown by X2. The width direction of the vehicle 200 is shown by Y, the right direction among the width direction Y is shown by Y1, and the left direction is shown by Y2. The height direction of the vehicle is shown by Z.

[0011] As shown in FIG. 1, the wheelchair 100 has a seat portion 110, armrests 120, a footrest 130, and an anchor bar 140. The seat portion 110 is where the user 300 who uses the wheelchair can sit. The armrests 120 are arranged on both the left and right sides of the seat portion 110. The armrests 120 are where the user 300 sitting on the seat portion 110 can place their elbows. The footrest 130 is arranged in front of the front wheels 150. The footrest 130 is where the user 300 sitting on the seat portion 110 can place their feet. The anchor bar 140 is below the seat portion 110 and is arranged to extend along the width direction of the wheelchair 100 between the front wheels 150 and the rear wheels 160. The anchor bar 140 is used when the wheelchair 100 is fixed to the vehicle 200 by the wheelchair fixing device 1. The anchor bar 140 is provided on the seat portion 110 side rather than the respective ground contact surfaces of the front wheels 150 and the rear wheels 160 so as not to interfere with the movement of the wheelchair 100 during the movement of the wheelchair 100. The anchor bar 140 is arranged above the line connecting the lowermost ends of the front wheels 150 and the rear wheels 160 respectively.

[0012] When mounting the wheelchair 100 on the vehicle 200, as shown in FIG. 2, for example, the wheelchair 100 is lifted up to a predetermined height by a lift device 210 arranged on the vehicle 200, and then the wheelchair 100 is moved into the passenger compartment 220 from there. The wheelchair fixing device 1 is used for fixing the wheelchair 100 when the lift device 210 lifts up the wheelchair 100 and for fixing the wheelchair 100 after the wheelchair 100 is moved into the passenger compartment 220. In the present embodiment, the wheelchair fixing device 1 is provided on both the lift device 210 and the passenger compartment 220. Note that when it is possible to mount a plurality of wheelchairs 100 in the passenger compartment 220, the wheelchair fixing device 1 corresponding to the number of wheelchairs 100 is provided in the passenger compartment 220. Also, when mounting the wheelchair 100 in the passenger compartment 220 from the side sliding door on the side of the vehicle 200, the wheelchair fixing device 1 may be provided on a lift device arranged on the side of the vehicle.

[0013] FIG. 3A is a perspective view of the wheelchair fixing device 1 in a state where the hook portion is retracted downward. FIG. 3B is a perspective view of the wheelchair fixing device 1 in a state where the hook portion, which will be described later, is rotated upward. FIG. 4 is a plan view showing the wheelchair fixing device 1 with the upper cover removed.

[0014] The wheelchair fixing device 1 includes a base portion 11, an upper cover 12, and a locking and fixing device 15. The base portion 11 is a substantially plate-shaped member. The base portion 11 is fixed along the floor surface 201 of the vehicle 200. As described above, in the present embodiment, since the wheelchair fixing device 1 is disposed in the lift device 210 and the passenger compartment 220, the base portion 11 is fixed along the floor surface 211 of the lift device 210 and the floor surface 221 of the passenger compartment 220. The base portion 11 may be fastened and fixed to the floor surface 211 of the lift device 210 and the floor surface 221 of the passenger compartment 220 respectively using bolts (not shown), or may be fixed via fixing members (not shown) separately provided on the floor surface 211 of the lift device 210 and the floor surface 221 of the passenger compartment 220 respectively. The base portion 11 is preferably formed of metal to ensure strength. Hereinafter, when not distinguishing between the floor surface 211 of the lift device 210 and the floor surface 221 of the passenger compartment 220, it will be described as the floor surface 201 of the vehicle 200.

[0015] The locking and fixing device 15 is disposed on the base portion 11. The upper cover 12 covers the base portion 11 from above. The material of the upper cover 12 is not particularly limited, and may be metal like the base portion 11 or resin. The locking and fixing device 15 can be housed between the base portion 11 and the upper cover 12.

[0016] (Locking and Fixing Device 15) When fixing the wheelchair 100, the locking and fixing device 15 locks the anchor bar 140 of the above-described wheelchair 100. The locking and fixing device 15 is disposed near the center of the base portion 11 in the front-rear direction X.

[0017] FIG. 5 is a perspective view showing the vicinity of the locking and fixing device 15. FIG. 6 is a cross-sectional view of the vicinity of the locking and fixing device 15 between AA' in FIG. 4. As shown in FIGS. 4 and 5, the locking and fixing device 15 includes a holding bracket 21, a slide portion 22, a pair of hook portions 23, a drive mechanism 24, and a detachable connecting portion 25.

[0018] The holding bracket 21 slidably attaches the slide portion 22 to the base portion 11. The pair of hook portions 23 pivot with respect to the base portion 11 by the sliding movement of the slide portion 22 with respect to the base portion 11, and lock the anchor bar 140 (the portion to be locked) of the wheelchair 100 shown in FIG. 2. The drive mechanism 24 slides the slide portion 22. The detachable connecting portion 25 detachably connects the drive mechanism 24 to the slide portion 22.

[0019] (Holding bracket 21) As shown in FIGS. 4 and 5, the holding bracket 21 is fixed on the base portion 11. The holding bracket 21 holds the slide portion 22 and the drive mechanism 24 on the base portion 11. The holding bracket 21 is provided along the front-rear direction X. The holding bracket 21 is fixed by bolts at the front end on the X1 side, the rear end on the X2 side, and the center in the front-rear direction X.

[0020] As shown in FIGS. 4 to 6, the holding bracket 21 has a motor holding portion 32, a guide portion 33, and a gear support portion 34. The motor holding portion 32 is a portion on the X2 side (rear direction) of the holding bracket 21. A part of the motor holding portion 32 is arranged in a state of being separated upward along the Z direction from the base portion 11 (a state of floating from the base portion 11).

[0021] As shown in FIG. 5, the motor holding portion 32 has a flat portion 32a and a pair of standing portions 32b. The flat portion 32a is parallel to the plane including the front-rear direction X and the width direction Y, and is spaced apart from the base portion 11 in the upward Z direction. The pair of standing portions 32b are arranged to face each other in the width direction Y. The pair of standing portions 32b support the flat portion 32a on the base portion 11. The motor holding portion 32 holds the motor unit 61 of the drive mechanism 24 above the flat portion 32a. The motor unit 61 is fastened and fixed to the motor holding portion 32 with bolts.

[0022] The guide portion 33 is a portion on the frontward X1 side of the holding bracket 21. A part of the guide portion 33 is arranged in a state of being spaced apart from the base portion 11 along the upward Z direction (a state of floating from the base portion 11). As shown in FIG. 4, the guide portion 33 has a flat portion 33a and a pair of standing portions 33b. The flat portion 33a is parallel to the plane including the front-rear direction X and the width direction Y, and is spaced apart from the base portion 11 in the upward Z direction. The pair of standing portions 33b are arranged to face each other in the width direction Y. The pair of standing portions 33b support the flat portion 33a on the base portion 11. A slide groove 36 is formed along the front-rear direction X in the flat portion 33a. The slide groove 36 is formed as an opening portion having an elongated hole shape in plan view, but the shape is not limited to the elongated hole shape as long as the slide portion 22 can be guided along the front-rear direction X. For example, it may be a rectangular shape. The guide portion 33 guides the slide portion 22 along the linear direction (front-rear direction X). The guiding of the slide portion 22 by the guide portion 33 will be described later.

[0023] The gear support portion 34 rotatably supports a gear 62 (described later) of the drive mechanism 24 on the base portion 11. The gear support portion 34 is arranged on the upward Z side of the gear 62. The gear support portion 34 is a portion that connects the motor holding portion 32 and the guide portion 33 in the holding bracket 21. The gear support portion 34 is parallel to the plane including the front-rear direction X and the width direction Y. The flat portion 32a of the motor holding portion 32, the gear support portion 34, and the flat portion 33a of the guide portion 33 are integrally formed with each other.

[0024] (Slide portion 22) FIG. 7 is a plan view for explaining a state in which the slide portion 22 slides by the drive mechanism 24. In FIG. 7, the slide portion 22 in a state of being moved to the forward direction X1 side is shown by a solid line, and the slide portion 22 in a state of being moved to the rearward direction X2 side is shown by a two-dot chain line.

[0025] As shown in FIGS. 5 to 7, the slide portion 22 has a rod 41, a rod support 42, and a convex portion 43. The rod 41 is a rod-shaped member. The rod 41 is arranged along the width direction Y. By the sliding movement of the rod 41, a hook portion 23 described later rotates.

[0026] The rod support 42 supports the rod 41 on the upper side Z of the guide portion 33. The rod support 42 is formed by bending a plate-shaped member. The rod support 42 is arranged below the rod 41. As shown in FIG. 6, the convex portion 43 is arranged at the frontward direction X1 side end of the rod support 42. The convex portion 43 protrudes downward from the rod support 42. The convex portion 43 is inserted into the slide groove 36 of the guide portion 33 from above.

[0027] (Hook portion 23) As shown in FIGS. 4 and 5, a pair of hook portions 23 are arranged in a left-right pair so as to face each other along the width direction Y. The pair of hook portions 23 are configured symmetrically with respect to the center in the width direction Y. The hook portion 23 has a thin plate shape. The hook portion 23 is arranged parallel to a plane including the front-rear direction X and the upper direction Z.

[0028] As shown in FIG. 5, the hook portion 23 is rotatably supported by the base portion 11 via a fixing member 26. As shown in FIG. 4, the fixing members 26 are arranged opposite to each other in the width direction Y. The pair of fixing members 26 are arranged outside the pair of hook portions 23 in the width direction Y. The fixing member 26 has a flat portion 26a parallel to a plane including the front-rear direction X and the upward direction Z. The shaft member 51 penetrates through the flat portion 26a along the width direction Y, and the hook portion 23 is rotatably supported by the shaft member 51. The shaft member 51 is provided at the frontward X1-side end of the flat portion 26a. The hook portion 23 can change its posture over the lying posture and the standing posture by rotating about the shaft member 51 as a rotation axis.

[0029] FIG. 8A is a view showing the state where the hook portion 23 is in the lying posture. FIG. 8B is a view showing the state where the hook portion 23 is in the standing posture. In FIGS. 8A and 8B, the hook portion 23 on the rightward Y1 side is shown.

[0030] The lying posture is a state where the hook portion 23 lies down with respect to the base portion 11. As shown in FIG. 3A, it shows the state where the hook portion 23 is housed in the through portion 12e formed in the upper cover 12. In the lying posture, as shown in FIG. 3A, the upper end 23a of the hook portion 23 is in a state parallel to the front-rear direction X. In the lying posture, the hook portion 23 does not protrude from the upper cover 12 and is housed in the upper cover 12 and the base portion 11.

[0031] The standing posture is a state where the hook portion 23 rotates upward with respect to the base portion 11 as shown in FIG. 8B. In the standing posture, the upper end 23a of the hook portion 23 is in a state of being separated from the base portion 11 more as it goes toward the rearward X2 direction.

[0032] As shown in FIGS. 8A and 8B, a notch portion 52 is formed in the hook portion 23 on the rearward X2 side of the central portion in the front-rear direction X. It is formed from the lower end 23b to the upper end 23a of the hook portion 23 in the lying state. The opening 52a of the notch portion 52 is formed at the lower end 23b.

[0033] When the wheelchair 100 moves forward in the X1 direction from the rear while the hook portion 23 shown in FIG. 8B is in the upright posture, the anchor bar 140 is disposed inside the notch portion 52 while pushing the hook portion 23 upward in the C1 direction. When the hook portion 23 is rotated downward in the C2 direction in this state, as shown in FIG. 8C, the anchor bar 140 can be locked by the hook portion 23.

[0034] On the other hand, by rotating the hook portion 23 upward in the C1 direction from the state of being locked to the anchor bar 140, the locking to the anchor bar 140 can be released. When the wheelchair 100 is moved backward in the X2 direction in this state, the anchor bar 140 can be pulled out from the notch portion 52 while pushing up the hook portion 23.

[0035] As shown in FIGS. 8A to 8C, an opening portion 53 is formed in each of the pair of hook portions 23. As shown in FIG. 8A, the opening portion 53 is formed along the base portion 11 when the hook portion 23 is in the lying posture.

[0036] As shown in FIG. 5, a guide groove 26b is formed in each of the flat portions 26a of the pair of fixing members 26. The guide groove 26b is formed along the front-rear direction X. The guide groove 26b penetrates the fixing member 26 along the width direction Y.

[0037] As shown in FIG. 5, the right end of the rod 41 passes through the opening portion 53 of the hook portion 23 on the right Y1 side and is inserted into the guide groove 26b of the fixing member 26 on the right Y1 side. The left end of the rod 41 passes through the opening portion 53 of the hook portion 23 on the left Y2 side and is inserted into the guide groove 26b of the fixing member 26 on the left Y2 side.

[0038] As shown in FIG. 8A, the opening portion 53 is formed such that, in a state where the hook portion 23 is in a fallen posture, it gradually separates from the base portion 11 along the upward direction Z as it approaches the rear direction X2 side from the central portion in the front-rear direction X, and is formed to gradually separate from the base portion 11 along the upward direction Z as it approaches the front direction X1 side from the central portion in the front-rear direction X. In the present embodiment, the opening portion 53 is formed such that the amount of upward movement from the central portion in the front-rear direction X toward the front direction X1 side is smaller than the amount of upward movement from the central portion in the front-rear direction X toward the rear direction X2 side. With such a shape, when the rod 41 moves to the front direction X1 side in a case where the hook portion 23 is in a fallen posture, it becomes possible to shift the hook portion 23 to an upright posture.

[0039] As shown in FIG. 8A, an auxiliary mechanism 27 is provided adjacent to the central side in the width direction Y of the hook portion 23. The auxiliary mechanism 27 is disposed adjacent to the central portion in the front-rear direction X of the opening portion 53. The auxiliary mechanism 27 includes a biasing member 54, a swing member 55, and a support member 56. The biasing member 54 is disposed across the swing member 55 and the support member 56. When the rod 41 moves to the front direction X1 side, as shown in FIG. 8B, the swing member 55 is pushed down to the front direction X1 side by the rod 41. As a result, the support member 56 is pulled toward the hook portion 23 side via the biasing member 54, and the support member 56 supports the hook portion 23 from below toward the upward direction Z, assisting in maintaining the standby posture of the hook portion 23. On the other hand, when the rod 41 moves to the rear direction X2 side, the support member 56 is pushed down toward the base portion 11 side in response to the rotation of the hook portion 23 to the fallen posture side. As a result, as shown in FIG. 8A, the swing member 55 is pulled toward the support member 56 side via the biasing member 54 and stands upright with respect to the base portion 11.

[0040] (Drive mechanism 24) As shown in FIGS. 4 and 5, the drive mechanism 24 moves the slide portion 22 in the front-rear direction X. The drive mechanism 24 includes a motor unit 61, a gear 62 (rotating member), and a link member 63. The gear 62 rotates by the driving force of the motor 64 of the motor unit 61. The link member 63 connects the gear 62 and the slide portion 22.

[0041] The motor unit 61 has a motor 64 (driving source). The motor unit 61 generates a driving force for moving the slide portion 22 along the front-rear direction X. The motor unit 61 is fastened and fixed to the flat surface portion 32a of the motor holding portion 32 described above by bolts. The output shaft 64a of the motor 64 is disposed downward. In FIG. 7, only the output shaft 64a of the motor unit 61 is shown. As shown in FIG. 7, an output pinion 65 is fixed to the output shaft 64a of the motor 64. The gear 62 rotates in response to the rotation of the output shaft of the motor unit 61. The gear 62 rotates about an axis parallel to the upward direction Z. The gear 62 includes a main body portion 621, a tooth portion 622, and a guide portion 623. The main body portion 621 is a disk-shaped flat plate. As shown in FIGS. 6 and 7, a rotation shaft 624 is inserted through the central portion in the radial direction along the upward direction Z in the main body portion 621. The tooth portion 622 is formed on at least a part of the outer peripheral surface 625 of the main body portion 621 and meshes with the output pinion 65.

[0042] The guide portion 623 is formed by notching the main body portion 621 in an arc shape coaxially with the rotation axis center 62o of the gear 62. The rotation axis center 62o corresponds to the axis of the rotation shaft 624. A regulating member 37 is inserted into the guide portion 623. The regulating member 37 is included in the holding bracket 21. The regulating member 37 is provided so as to protrude from the gear support portion 34 toward the base portion 11. The regulating member 37 is a rod-shaped member. When the gear 62 rotates, the guide portion 623 rotates along the regulating member 37. The length of the guide portion 623 along the rotation direction of the gear 62 is formed according to the amount of posture change between the fallen posture and the standing posture of the hook portion 23. The rotation of the gear 62 is regulated by the contact of the regulating member 37 with both edges in the circumferential direction of the guide portion 623.

[0043] The link member 63 converts the rotational force of the gear 62 into linear motion. As shown in FIG. 7, the link member 63 includes a first end portion 63a, a second end portion 63b, and a central portion 63c. The first end portion 63a of the link member 63 is attached to the gear 62 so as to be rotatable about an axis parallel to the upward Z direction. As shown in FIG. 6, the first end portion 63a of the link member 63 is rotatably attached to the gear 62 from above by a shaft member 66. The first end portion 63a is attached to the outer peripheral portion of the main body portion 621 as shown in FIG. 7. Thereby, the first end portion 63a of the link member 63 rotates about the rotation axis center 62o.

[0044] The second end portion 63b of the link member 63 is rotatably attached to the rod support 42 of the slide portion 22 by a detachable connection portion 25 (described later) so as to be rotatable about an axis parallel to the upward Z direction. The central portion 63c connects the first end portion 63a and the second end portion 63b. Since the second end portion 63b is located on the upward Z side rather than the first end portion 63a, the central portion 63c is inclined so as to go upward in the Z direction as it goes from the first end portion 63a to the second end portion 63b. Note that although the central portion 63c is inclined in the present embodiment, it is only necessary to be able to connect the first end portion 63a and the second end portion 63b according to the vertical mounting positions of the first end portion 63a and the second end portion 63b. For example, the first end portion 63a, the second end portion 63b, and the central portion 63c may be located on the same plane.

[0045] In FIG. 7, the state of the drive mechanism 24 when the slide portion 22 is positioned on the forward X1 side is shown by a solid line, and the state of the drive mechanism 24 when the slide portion 22 is positioned on the rearward X2 side is shown by a two-dot chain line. In the state of the drive mechanism 24 shown by the two-dot chain line, when the output pinion 65 rotates as the motor 64 rotates and the gear 62 rotates in the direction of arrow D2 (see FIG. 7), the first end portion 63a also rotates in the direction of arrow D2, and the second end portion 63b is pushed out toward the forward X1 side. By pushing the second end portion 63b toward the forward X1 side, the slide portion 22 also moves toward the forward X1 side along the slide groove 36. Also, in the state of the drive mechanism 24 shown by the solid line, when the output pinion 65 rotates as the motor 64 rotates and the gear 62 rotates in the direction of arrow D1 (see FIG. 7), the first end portion 63a also rotates in the direction of arrow D1, and the second end portion 63b is pulled toward the rearward X2 side. By pulling the second end portion 63b toward the rearward X2 side, the slide portion 22 also moves toward the rearward X2 side along the slide groove 36.

[0046] (Detachable connecting portion 25) The detachable connecting portion 25 detachably connects the second end portion 63b of the link member 63 to the slide portion 22. FIG. 9 is a cross-sectional view taken along the link member 63 between BB' in FIG. 7. The detachable connecting portion 25 includes a nut member 71 (fixing member), a collar 72, washers 73a and 73b, and a bolt 74 (restricting member).

[0047] The nut member 71 is fixed to the rod support 42 of the slide portion 22. The nut member 71 is provided so as to penetrate the rod support 42. The nut member 71 has a fixed portion 81, a convex portion 82, and a link arrangement portion 83. The fixed portion 81 is fixed to the rod support 42. The fixed portion 81 has a columnar shape. The central axis of the fixed portion 81 is parallel to the upward direction Z. The convex portion 82 is disposed below the fixed portion 81. The convex portion 82 protrudes downward from the fixed portion 81. The convex portion 82 has a columnar shape and is arranged such that its central axis is parallel to the upward direction Z. The central axis of the convex portion 82 coincides with the central axis of the fixed portion 81. As shown in FIG. 6, the convex portion 82 is inserted into the slide groove 36 of the guide portion 33. When the slide portion 22 moves along the front-rear direction X, the convex portion 82 and the convex portion 43 move along the slide groove 36.

[0048] A link member 63 is disposed around the link arrangement portion 83. The link arrangement portion 83 is disposed above the fixed portion 81. The outer shape of the link arrangement portion 83 is columnar. The link arrangement portion 83 is arranged such that its central axis is parallel to the upward direction Z. The central axis of the link arrangement portion 83 coincides with the central axis of the convex portion 82 and the central axis of the fixed portion 81. This central axis is shown as the central axis 71o of the nut member 71. The outer diameter of the link arrangement portion 83 is formed smaller than the outer diameter of the fixed portion 81. The link arrangement portion 83 is inserted downward into a through hole 63d formed along the vertical direction at the second end portion 63b of the link member 63. A bolt hole 84 (hole portion) is formed downward from the upper surface 83a (end surface) in the link arrangement portion 83. The bolt hole 84 is formed along the central axis 71o. A female screw shape is formed on the inner peripheral surface of the bolt hole 84.

[0049] The collar 72 is disposed between the nut member 71 and the link member 63. The collar 72 is disposed on the upper surface 81a of the fixed portion 81 and radially outside the link arrangement portion 83. The upper surface 81a of the fixed portion 81 is a portion radially outside the link arrangement portion 83. The radial direction is perpendicular to the central axis 71o and is the direction approaching and receding from the central axis 71o. The collar 72 has a cylindrical portion 91 and a flange portion 92. The cylindrical portion 91 is disposed radially outside the link arrangement portion 83. The flange portion 92 projects radially outward from the lower end of the cylindrical portion 91. The flange portion 92 is formed over the entire circumference of the lower end of the cylindrical portion 91. The flange portion 92 is disposed on the upper surface 81a of the fixed portion 81. The collar 72 is disposed on the nut member 71 from above the nut member 71 such that the link arrangement portion 83 is inserted inside the cylindrical portion 91.

[0050] The cylindrical portion 91 of the collar 72 is inserted into the through hole 63d of the second end portion 63b of the link member 63 from below, and the second end portion 63b of the link member 63 is disposed above the flange portion 92.

[0051] The washers 73a and 73b are disposed around the link arrangement portion 83 and above the second end portion 63b of the link member 63. The washers 73a and 73b are disposed around the cylindrical portion 91 of the collar 72. In the present embodiment, two washers 73a and 73b are disposed on the second end portion 63b, but the number is not limited to two.

[0052] The bolt 74 is attached to the nut member 71 to prevent the link member 63 from detaching from the link arrangement portion 83. The bolt 74 has an insertion portion 85 and a head portion 86. The insertion portion 85 is cylindrical, and a male screw shape is formed on its outer periphery. The insertion portion 85 is inserted into the bolt hole 84 of the link arrangement portion 83 and engages with the female screw shape on the inner peripheral surface of the bolt hole 84. The head portion 86 is disposed at the upper end of the insertion portion 85. The outer shape of the head portion 86 is formed larger than the through hole 63d of the second end portion 63b. A part of the head portion 86 overlaps with the second end portion 63b of the link member 63 when viewed from the direction along the central axis 71o. For this reason, the upward movement of the second end portion 63b in the Z direction is restricted by the head portion 86. The bolt 74 is fastened and fixed to the link arrangement portion 83 from above the washer 73b after the collar 72, the link member 63, and the washers 73a and 73b are arranged on the nut member 71. Note that the bolt 74 can be attached to or removed from the link arrangement portion 83 using a dedicated tool.

[0053] (Operation) When the hook portion 23 shown in FIG. 3A is in the lying-down posture, the slide portion 22 is arranged at the rear side (see the two-dot chain line shown in FIG. 7).

[0054] From this state, when the motor 64 of the motor unit 61 is driven, the output shaft of the motor 44 rotates in one direction, and the output pinion 65 fixed to the output shaft rotates. Due to the rotation of the output pinion 65, the gear 62 also rotates. In the plan view of FIG. 7, the gear 62 rotates in the direction of arrow D2. Due to the rotation of the gear 62 in the direction of arrow D2, the first end portion 63a of the link member 63 also rotates in the direction of arrow D2. Along with the movement of the first end portion 63a, the second end portion 63b moves toward the front direction X1 side. Due to the movement of the second end portion 63b, the slide portion 22 moves toward the front direction X1 side.

[0055] As shown in FIG. 8B, when the slide portion 22 moves forward in the X1 direction, the rod 41 also moves forward in the X1 direction. As the rod 41 moves forward in the X1 direction, the hook portion 23 assumes an upright posture. At this time, the swing member 55 is pushed down, and the support member 56 supports the hook portion 23 upward in the Z direction from the lower side to maintain the upright posture of the hook portion 23.

[0056] When the wheelchair 100 moves forward in the X1 direction from the rear while the hook portion 23 is in the upright posture, the anchor bar 140 is disposed inside the notch portion 52 while pushing the hook portion 23 upward in the C1 direction.

[0057] Next, when the motor 44 is driven to rotate the gear 62 in the direction of arrow D1 to move the slide portion 22 in the X2 direction, the hook portion 23 is rotated downward in the C2 direction. As a result, as shown in FIG. 8C, the anchor bar 140 of the wheelchair 100 can be locked by the hook portion 23, and the wheelchair 100 can be fixed by the wheelchair fixing device 1.

[0058] When releasing the fixation of the wheelchair 100 by the wheelchair fixing device 1, the motor 44 is rotated to rotate the gear 62 in the direction of arrow D2 to move the slide portion 22 in the X1 direction. By the forward movement of the slide portion 22 in the X1 direction, the hook portion 23 rotates upward in the C1 direction (see FIG. 8C). As a result, the locking of the anchor bar 140 by the hook portion 23 is released. When the wheelchair 100 is moved backward in the X2 direction in this state, the anchor bar 140 can be pulled out from the notch portion 52 while pushing up the hook portion 23.

[0059] (Emergency release) The release of the fixation of the wheelchair 100 in an emergency such as a power failure will be described.

[0060] In an emergency such as a power failure, the connection between the drive mechanism 24 and the slide portion 22 is released by removing the bolt 74 from the nut member 71 at the detachable connection portion 25. As a result, the slide portion 22 can be manually moved back and forth in the X direction.

[0061] FIG. 10 is a diagram showing a state where the bolt 74 is removed from the nut member 71. Since the wheelchair fixing device 1 is stopped with the hook portion 23 locked to the anchor bar 140, in the link member 63 of the wheelchair fixing device 1, a load is applied toward the gear 62 side (see arrow E). However, since the link member 63 is disposed around the nut member 71, no load is applied to the bolt 74, and the bolt 74 can be easily removed from the nut member 71.

[0062] Next, by removing the washers 73a and 73b from around the link arrangement portion 83 and the collar 72, and then removing the second end portion 63b of the link member 63 from around the link arrangement portion 83 and the collar 72, the connection between the drive mechanism 24 and the slide portion 22 can be released. In this state, since the slide portion 22 can be manually moved in the front-rear direction X, by manually moving the slide portion 22 toward the front direction X1 side, the hook portion 23 can be rotated upward, and the locking of the hook portion 23 to the anchor bar 140 can be released.

[0063] (Features, etc.) In the wheelchair fixing device 1 of the present embodiment, in an emergency such as a power failure, the slide portion 22 can be removed from the drive mechanism 24 by the detachable connection portion 25. Therefore, by manually moving the slide portion 22 to rotate the hook portion 23, the locking of the anchor bar 140 of the wheelchair 100 by the hook portion 23 can be released.

[0064] In the wheelchair fixing device 1 of the present embodiment, at the time of power failure, the wheelchair fixing device 1 is stopped with a force applied to the link member 63 in one direction. However, since the link member 63 is disposed around the nut member 71 fixed to the slide portion 22, the force is only transmitted to the nut member 71 and not to the bolt 74. Therefore, the bolt 74 can be easily removed from the nut member 71, and the engagement of the anchor bar 140 of the wheelchair 100 by the hook portion 23 can be released.

[0065] Also, in the wheelchair fixing device 1 of the present embodiment, when the slide portion 22 is slid, the link member 63 has an angular change and its rotational force is also transmitted. However, since the link member 63 is arranged around the nut member 71 fixed to the slide portion 22, the rotational force is only transmitted to the nut member 71 and not to the bolt 74. Therefore, it is possible to prevent the bolt 74 from loosening and coming off the nut member 71.

[0066] (Other embodiments) As described above, one embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.

[0067] (A) In the wheelchair fixing device 1 of the above embodiment, the detachable connecting portion 25 is provided with a collar 72 and washers 73a and 73b. However, either one or both of the collar and the washers may not be provided.

[0068] (B) In the nut member 71 of the detachable connecting portion 25 of the above embodiment, both the fixed portion 81 and the convex portion 82 are circular in plan view. However, they are not limited to being circular.

[0069] (C) The nut member 71 of the detachable connecting portion 25 of the above embodiment is provided with a convex portion 82 inserted into the slide groove 36. However, the convex portion 82 may not be provided. In that case, it is preferable that the rod support 42 is provided with a convex portion inserted into the slide groove 36 in addition to the convex portion 43.

Industrial applicability

[0070] According to the wheelchair fixing device of the present invention, it is possible to release the fixation of the wheelchair in an emergency, and it can be applied to a vehicle or the like capable of mounting the wheelchair.

Explanation of reference numerals

[0071] 1: Wheelchair fixing device 11: Base part 22: Slide part 23: Hook part 24: Driving mechanism 25: Detachable connecting part 100: Wheelchair 140: Anchor bar

Claims

1. A base part, A slide part slidably attached to the base part, A locking part that rotates relative to the base part by the sliding movement of the slide part relative to the base part and locks a locked part of a wheelchair, A drive mechanism that slides the slide part, A detachable connecting part that detachably connects the drive mechanism to the slide part, and In a state where the connection between the drive mechanism and the slide part in the detachable connecting part is removed, the locking by the locking part of the locked part can be released. A wheelchair fixing device.

2. The drive mechanism includes A drive source, A rotating member that rotates by the driving force of the drive source, and A link member that connects the rotating member and the slide part, and The detachable connecting part connects between the link member and the slide part. The wheelchair fixing device according to claim 1.

3. The detachable connecting part includes A fixing member that is inserted through a through hole of the link member and has a link arrangement portion around which the link member is disposed, and is fixed to the slide part, and A regulating member attached to the fixing member to prevent the link member from detaching from the link arrangement portion, and The regulating member is detachable from the fixing member. The wheelchair fixing device according to claim 2.

4. A hole is formed in the link arrangement portion from an end face, A female screw is formed on the inner periphery of the hole, The regulating member includes A male screw that engages with the female screw and an insertion portion that is inserted into the hole, and A head portion fixed to an end of the insertion portion, and The head portion is disposed above the end face in a state where the insertion portion is inserted into the hole, and at least a part of the head portion overlaps the link member when viewed from a direction along the insertion portion. The wheelchair fixing device according to claim 3.

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