JP2010082051A - Wheelchair fixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheelchair fixing device with high stability, preventing a wire from being caught in gears if the wire is loosened. <P>SOLUTION: The wheelchair fixing device 10 includes a base 11; a drum 12 attached to the base and having a wire groove 34; the wire 13 stored in the wire groove 34 and having a hook at the distal end; a drum cover 14 covering the wire groove 34 and having a through-groove 43 for guiding the wire from the wire groove to outside; a drive unit 17 for rotationally driving the drum; and an intermediate gear 16 for transmitting the rotational force of the drive unit to the drum and connecting the driving unit and the drum. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wheelchair fixing device. Specifically, the present invention relates to a wheelchair fixing device that fixes a wheelchair accommodated in an automobile.

JP 2006-239288 A

Patent Document 1 is known as a wheelchair fixing device for fixing a wheelchair accommodated in an automobile.
As shown in FIG. 8, the wheelchair fixing device 100 includes a storage case 101 attached to the floor of a car, a drive motor M incorporated in the storage case, and an output gear 102 attached to the output shaft of the motor M. And intermediate gears 103a and 103b, winding pulleys 104a and 104b connected to the respective intermediate gears 103a and 103b, and turning pulleys 105a and 105b for changing the direction of the wire wound around the winding pulley.
The winding pulleys 104a and 104b are each provided with a spring, and the winding pulley is biased in the winding direction.

However, when the wire is sent out from the take-up pulley to remove the wheelchair from the wheelchair fixing device, momentary loosening of the wire cannot be prevented only by the urging force of the mainspring, and the wire comes off the wire groove of the take-up pulley. Sometimes. Then, there is a problem that the wire jumping out of the wire groove in this manner is caught between the gears and cannot be operated.
An object of the present invention is to provide a wheelchair fixing device having high stability without being caught between gears even when the wire is loosened.

  The wheelchair fixing device of the present invention includes a base, a drum having a wire groove attached to the base, and one end locked to the drum, and the other end connected to the wheelchair. A wire to which a connecting member is attached, a drum cover that is attached to the base and includes a through groove that covers the wire groove and guides the wire from the wire groove to the outside, and a drive device that rotationally drives the drum The rotation force of the drive device is transmitted to the drum, and the drive device and the drum are connected to each other.

(1) Since the wheelchair fixing device of the present invention includes the drum cover that covers the wire groove of the drum, even if the wire loosens momentarily, it does not jump out of the wire groove. Therefore, the wire is not pinched between the gears arranged on the base. Further, since the drum cover includes a through groove that guides the wire from the wire groove to the outside, the wire itself does not get entangled when the wire is loosened.
(2) The drum cover is ring-shaped, and includes an inner peripheral wall and an attachment surface extending in the outer peripheral direction from a lower end thereof, and the through groove is straight from a notch portion in which a part of the inner peripheral wall is notched. When formed in the shape, the wire groove of the drum is covered, and the wire accommodated in the wire groove is led to the outside without being entangled. In addition, the drum cover does not interfere with other parts.
(3) The through-groove comprises two side wall portions arranged on the left and right sides and a top plate portion connecting the upper ends of the side wall portions, and the two side walls when the drum cover is attached to the base. When the part regulates the movement of the wire in the left-right direction and the top plate part and the base regulate the movement of the wire in the vertical direction, the wire can be regulated within a predetermined range, and further contact with the gear of the wire Can be avoided.
(4) When the distance between the top plate portion and the base and the distance between the two side wall portions are larger than the outer diameter of the wire, the wire can be smoothly fed and wound.

  A wheelchair fixing device 10 shown in FIG. 1 includes a plate-shaped base 11, two drums 12 attached to the base, two wires 13 wound around the drums, and two drums covering the drums. The cover 14 includes two pulleys 15 that change the direction of the wires, two intermediate gears 16 provided between the two drums, and a driving device 17 that drives the drums. A hook 13 a for connecting to the wheelchair is provided at the tip of the wire 13. The drive device 17 includes a motor and a speed reducer, and a pinion (not shown) is connected to the output shaft of the speed reducer, and an idle gear 17a is meshed with the pinion.

  As shown in FIG. 2, the base 11 has a rectangular shape. The base 11 has a mounting hole 21 for an automobile formed around the four corners, a drum bearing 22 that protrudes from the left and right upper portions of the base, A drum cover mounting hole 23 formed around the drum bearing 22, a pulley groove 24 formed below the drum bearing, two intermediate gear shafts 25 formed between the drum bearings, and a central portion It consists of an idle gear bearing 26a and a pinion bearing 26b provided so as to protrude, and a drive device mounting portion 27 provided therebelow. The pulley groove 24 is provided with a substantially U-shaped pulley bracket 24a. Further, a stopper pin 25 a is provided so as to protrude adjacent to one intermediate gear shaft 25. The drive device mounting portion 27 is composed of a shaft provided with a hole through which a bolt for fixing the base 11 and the motor is passed, and the height of the motor is regulated by adjusting the height of the shaft. Furthermore, the four sides of the base 11 are bent downward. Therefore, it is fixed in a state where the floor of the automobile and the gap are left open. The base 11 is not particularly limited, but is formed of steel or the like.

  The drum 12 includes a cylindrical drum body 31 shown in FIG. 3 a, a drum gear 32 shown in FIG. 3 c attached to the upper surface of the drum body, and a spiral spring (not shown) housed in the drum body 31. . The drum 12 is attached to a base drum bearing so as to be rotatable in a lateral direction.

  The drum body 31 has a cylindrical shape, and is formed to protrude in the center, a wire groove 34 for winding a wire formed on a side surface, a spring hole 35 for accommodating a central end of a spiral spring formed on the inner periphery. The center shaft 36 is engaged with the drum bearing 22. The drum body 31 is formed with four screw holes 31a and is connected to the drum gear 32 using screws. This screw hole 31a is tapped. Further, the drum body 31 is formed with a wire end locking portion 31b. Since the left and right drum bodies 31 are also used, the wire end locking portions 31b are formed as a pair. The spiral spring biases the drum body 31 in the winding direction of the wire. The center end of the spiral spring is inserted into the spring hole 35 so as to cover the upper portion of the center shaft 36 (on the right side of the center shaft 36 in FIG. 3b), and the base 11 is sandwiched between the imaginary lines in FIG. 3b. . The drum body 31 is connected to the base 11 by inserting a central shaft 36 from the right side of the drum bearing 22 shown in FIG.

The drum gear 32 has a disk shape and includes teeth 37 formed on the outer periphery and four through holes 38 formed on the surface for connection to the drum main body 31. The tops of the teeth 37 are notched obliquely to avoid interference with the toothless portions 16c of the intermediate gear 16 described later. The through-holes 38 are provided alternately four by four with the spot facings opposite. Therefore, the same parts can be used for the left and right drum gears 32.
The drum body 31 and the drum gear 32 are not particularly limited, but are formed of steel, zinc alloy or the like.

As shown in FIGS. 4a, 4b, and 4c, the drum cover 14 has a ring shape, and is formed on the inner peripheral wall 41, the mounting surface 42 extending from the lower end thereof in the outer peripheral direction, and the mounting surface. The through-groove 43 communicated. In the portion of the through groove 43, the inner peripheral wall 41 is notched so as to pass the wire, and is continuous with the through groove 43. The through groove 43 has a substantially U-shaped cross section, and includes a top plate portion 43 a and a pair of side wall portions 43 b extending from the top plate portion 43 a toward the mounting surface 42. A plurality of ribs 42 a are provided between the attachment surface 42 and the inner peripheral wall 41, and a plurality of attachment holes 42 b are formed on the attachment surface 42 for attachment to the base 11.
The drum cover 14 of FIGS. 4a, 4b and 4c covers the drum 12 on the right side of the wheelchair fixing device of FIG. The drum cover that covers the drum 12 on the left side of the wheelchair fixing device in FIG. 1 has the same configuration as the drum cover 14 in FIG. 4, and the position of the through groove 43 is reversed left and right.

The drum cover 14 is attached so as to cover the outer periphery of the drum body 31, and the inner peripheral wall 41 closes the wire groove 34 of the drum body 31. Further, the through groove 43 of the drum cover 14 suppresses left and right vibration of the wire wound around the drum body 31 by the pair of side wall portions 43 b and suppresses vertical vibration by the top plate portion 43 a and the base 11. Therefore, the wire can be smoothly guided to the outside (see FIG. 1).
The drum cover 14 is not particularly limited, but is formed of a synthetic resin such as polyacetal (POM). The mounting surface 42 is notched at a portion where the drum gear 32 and the intermediate gear 16 are engaged with each other.
In the drum 12, the drum body 31 is first attached to the base 11, then the ring-shaped drum cover 14 is attached to the base 11 so as to cover the wire groove 34 of the drum body 31, and the drum gear 32 is attached to the drum body 31. It is assembled and mounted on top.

  As shown in FIGS. 5A and 5B, the pulley 15 has a cylindrical shape and is rotatably attached to the pulley bracket 24a. The pulley 15 includes a wire groove 15a formed on the outer peripheral side surface and a center hole 15b. The pulley 15 is attached perpendicular to the base 11. As a result, the wire 13 coming out of the through groove 43 of the drum cover 14 is changed in the direction perpendicular to the base.

  As shown in FIGS. 6a and 6b, the intermediate gear 16 is cylindrical and has the same effective diameter, and includes teeth 16a formed on the outer periphery and a center hole 16b. The tooth 16a of the intermediate gear 16 includes a toothless portion 16c from which a part of the upper half is removed. An arcuate groove 16d is formed on the lower surface of the intermediate gear. The stopper pin 25a of the base 11 is inserted into the groove 16d. Thereby, the intermediate gear 16 is rotatable within a range in which the stopper pin 25a can reciprocate both ends of the groove 16d. In the present embodiment, the stopper pin 25a is provided only on one intermediate gear 16 (right side in FIG. 1), but may be provided on both. The left and right intermediate gears 16 share the same parts.

  In the present embodiment, two intermediate gears 16 are used. One intermediate gear 16 (right side in FIG. 1) connects the idle gear 17a connected to the driving device 17 and one drum gear 32, and the other intermediate gear 16 (left side in FIG. 1) is the one intermediate gear. 16 and the other drum gear 32 are connected. The drum gear 32 meshes only with the upper half of the intermediate gear 16. That is, the intermediate gear 16 and the drum gear 32 normally mesh smoothly, but when the toothless portion 16c of the intermediate gear comes to the drum gear 32, the connection between the intermediate gear 16 and the drum 12 is temporarily disconnected. At the same time, the end of the groove 16d of the intermediate gear 16 is designed to come into contact with the stopper pin 25a. The intermediate gears 16 mesh with the lower half teeth even in the region of the toothless portion 16c.

  That is, while the intermediate gear 16 is driven to rotate by the driving device 17, the stopper pin 25a and the groove 16d of the intermediate gear 16 come into contact with each other and the intermediate gear 16 is restricted from rotating further in that direction. The connection between 16 and the drum 12 is also disconnected. In this state, the drum 12 is rotatable except that it is biased in the winding direction by a spiral spring. Therefore, by pulling the wire, for example, to hook the wire hook on the wheelchair, the drum 12 can be rotated against the biasing force of the spiral spring, and the wire can be pulled out.

  After the hook is attached to the wheelchair, the excess wire is wound up by the biasing force of the spiral spring. Next, when the intermediate gear 16 (right side in FIG. 1) is rotated clockwise by the driving device 17, a portion with the teeth 16a meshes with one drum gear 32, and one drum 12 (right drum in FIG. 1) is counterclockwise. Rotate around (in the direction of winding the wire). At this time, the other intermediate gear 16 also rotates counterclockwise, and the other drum 12 (left drum in FIG. 1) rotates clockwise (in the direction of winding the wire). Thereby, the wheelchair can be fixed by applying tension to the left and right wires. On the other hand, when the intermediate gear 16 (right side in FIG. 1) is rotated counterclockwise by the driving device 17, the wires 13 are rotated in the opposite directions and the tension can be released.

This wheelchair fixing device 10 is installed on the floor of a vehicle body, and only a wire 13 and a hook 13a are exposed from the floor by covering a cover (not shown). And after accommodating a wheelchair in a vehicle body, the wire 13 is pulled out to the predetermined location of a wheelchair, and the hook 13a is hooked (refer FIG. 7). Next, the drive device 17 pulls the wire 13 strongly to fix the wheelchair. This is used together with a belt 51 or the like that supports the forward and backward movement of the wheelchair.
Therefore, the wheelchair fixing device 10 is configured not to move even when the wire is pulled with a force of 6000 N or less when the wheelchair is fixed.

  In the wheelchair fixing device 10, the drum cover 14 is attached around the drum 12, so that the wire 13 remains between the gears even if a plurality of gears are used and the wire 13 is loosened and comes out of the wire groove. It will not get caught in Further, when the wheelchair is supported, even if the wheelchair is shaken or the wheelchair is swung from side to side and the wire 13 is loosened momentarily, the wire 13 does not come off from the wire groove 34 of the drum 12, so that the stability is good.

1a and 1b are a plan view and a side view showing an embodiment of the wheelchair fixing device of the present invention. 2a is a plan view showing the base of FIG. 1, and FIG. 2b is a sectional view taken along line XX. 3a is a plan view showing the drum body of FIG. 1, FIG. 3b is a cross-sectional view taken along line AA of FIG. 3a, and FIG. 3c is a plan view showing the drum gear of FIG. 4A, 4B, 4C, and 4D are a plan view, a rear view, a side view, and a bottom view showing the drum cover of FIG. 5a and 5b are a side view and a plan view showing the pulley of FIG. 6A and 6B are a plan view and a side view showing the intermediate gear of FIG. It is drawing which shows the handling method of the wheelchair fixing device of this invention. It is a top view which shows the conventional wheelchair fixing device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wheelchair fixing device 11 Base 12 Drum 13 Wire 13a Hook 14 Drum cover 15 Pulley 15a Wire groove 15b Center hole 16 Intermediate gear 16a Tooth 16b Center hole 16c Toothless part 16d Groove 17 Drive unit 17a Idle gear 21 Mounting hole 22 Drum bearing 23 Drum cover mounting hole 24 Pulley groove 24a Pulley bracket 25 Intermediate gear shaft 25a Stopper pin 26a Idle gear bearing 26b Pinion bearing 27 Drive device mounting portion 31 Drum body 31a Screw hole 31b Wire end locking portion 32 Drum gear 34 Wire groove 35 Spring hole 36 Central shaft 37 Teeth 38 Through hole 41 Inner peripheral wall 42 Mounting surface 42a Rib 42b Mounting hole 43 Through groove 43a Top plate portion 43b Side wall portion

Claims (4)

Base and
A drum with a wire groove attached to the base;
The wire is housed in the wire groove, one end is locked to the drum, and the other end has a wire attached with a connecting member for connecting to a wheelchair,
A drum cover that is attached to the base and includes a through groove that covers the wire groove and guides the wire from the wire groove to the outside;
A driving device for rotationally driving the drum;
A wheelchair fixing device comprising a gear for transmitting a rotational force of the driving device to the drum and connecting the driving device and the drum. The drum cover is ring-shaped, and includes an inner peripheral wall and a mounting surface extending from the lower end to the outer peripheral direction,
The wheelchair fixing device according to claim 1, wherein the through groove is formed linearly from a cutout portion formed by cutting out a part of the inner peripheral wall. The through groove is composed of a pair of side wall portions arranged on the left and right sides, and a top plate portion connecting the upper ends of the side wall portions,
2. When the drum cover is attached to the base, the pair of side wall portions restricts the movement of the wire in the left-right direction, and the top plate portion and the base restrict the movement of the wire in the up-down direction. 2. The wheelchair fixing device according to 2. The wheelchair fixing device according to claim 3, wherein an interval between the top plate portion and the base and an interval between the pair of side wall portions are larger than an outer diameter of the wire.