JP3075113U - Wheelchair brake adjuster - Google Patents

Abstract

(57) [Problem] To provide a wheelchair brake adjusting device that is easy to manufacture, eliminates vibration during running, and allows a user to easily change a brake position depending on a use environment. SOLUTION: A brake adjusting device for a wheelchair characterized in that a brake mounting member having a long hole and a brake presser with a handle are clamped by a lever having an eccentric sliding portion and a support shaft.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a wheelchair brake adjusting device.

[0002]

[Prior art]

 Wheelchair brakes fix the wheelchair so that the user can get on and off the wheelchair safely when parking or stopping on a slope such as a slope, and it is an important component of the wheelchair components used in daily life. One of the parts. Since the quality of the brakes depends on the position of the brake, the position of the brake is preferably adjustable.

[0003] Such wheelchair brake adjustment devices have been proposed in the past. 10A and 10B are diagrams showing an example thereof, wherein FIG. 10A is a right side view of a conventional wheelchair brake adjusting device, and FIG. 10B is a left side view.

In the conventional wheelchair brake adjusting device shown in FIG. 10, a long hole 43 provided in a plate-shaped member 42 for mounting a brake presser 41 with a handle and a brake presser 41 for a brake with a handle are provided. The bolt 44 is inserted into the hole for the bolt and screwed with a nut 45. For this reason, if the nut 45 is loosened, the brake retainer 41 with handle can slide along the long hole 43, and is adjusted to an arbitrary position, and is fixed by tightening the nut 45.

[0005] However, the above-described conventional wheelchair brake adjustment device requires a tool to loosen the bolt and nut for position adjustment. In this case, it was not possible to make an immediate adjustment when the braking performance deteriorated significantly, such as when the tires got wet due to changes in the weather or when the air pressure of the tires decreased. For this reason, the wheelchair started to move when getting in and out of the wheelchair, and could fall or fall, possibly causing an accident or injury.

As a device for overcoming such difficulties, the following conventional wheelchair brake adjusting device is known. FIGS. 11A and 11B show an example thereof, wherein FIG. 11A is a perspective view of a conventional wheelchair brake adjusting device, and FIG. 11B is an exploded perspective view of FIG. This has a sliding portion 53 having the same shape as the cross-sectional shape of the brake case 52 having a substantially box-shaped cross-sectional shape, and a brake presser 51 with a handle is screwed to the sliding portion 53. Further, the brake adjusting device is provided with an adjusting knob 55 at one end of the male screw shaft 54. By turning the adjustment knob 55, the sliding portion 53 slides in the brake case 52 and can be adjusted to an arbitrary position.

[0007]

[Problems to be solved by the invention]

 However, in the conventional brake position adjusting device shown in FIG. 11, since the brake presser 51 with a handle is screwed into the sliding portion 53, if the clearance between the sliding portion 53 and the brake case 52 is excessively taken, In particular, the upper end portion of the handle portion 51a vibrates, which causes abnormal noise during running and causes screws to fall off.

In order to reduce the vibration of the brake presser 51 with handle, the clearance between the sliding portion 53 and the brake case 52 must be minimized while considering the sliding of the sliding portion 53. There must be. For this reason, each member requires accuracy. Therefore, the productivity was low and the product price was high.

It is an object of the present invention to solve these problems. More specifically, an object of the present invention is to provide a wheelchair brake adjusting device that reduces the vibration of a brake retainer with a handle and improves productivity.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the wheelchair brake adjusting device of the present invention is provided with an elongated hole 6a in the brake mounting member 6 and a sliding portion 5 substantially in the sliding direction, as shown in FIGS. The vertically mounted lever mounting portion 5a is inserted so that the press contact surface 5b obliquely provided in the pressure direction and the press contact surface 6b obliquely provided in the pressure direction of the brake mounting member 6 are in contact with each other. Further, the lever mounting portion 5a is formed by penetrating a hole 1a in the brake holding tool 1 with a handle, and the lever 2 with the support shaft 3 eccentric is provided in the lever mounting portion 5a so as to be able to slide. .

With such a configuration, when the lever 2 is manually operated, the sliding portion 5 is responsive to the lever 2, and is brought into contact with the pressure contact surface 5 b obliquely provided at the same inclination with respect to the pressure direction. The surface 6b is strongly pressed and the brake position can be fixed.

In other words, by obliquely providing the press contact surface, which is the key to fixing the brake position according to the present invention, the press contact area can be increased, and the fixing strength is improved.

As shown in FIG. 7, in the wheelchair brake adjusting device, instead of the lever mounting portion 5a, an adjusting knob mounting portion 5c in which a male screw is threaded is provided, and the adjusting knob mounting portion 5c is provided with a screw. An adjustment knob 22 having a hole 22a is provided.

With this configuration, when the adjustment knob 22 is manually tightened, the brake position can be fixed similarly to the above-described wheelchair brake adjustment device of the present invention.

As shown in FIGS. 8 and 9, in the wheelchair brake adjusting device of the present invention described above, instead of the adjusting knob mounting portion 5a, the sliding portion 33 is substantially perpendicular to the sliding direction. An adjusting knob 32 having a male screw portion 32a is provided through the screw hole 33a. Further, the present invention is characterized in that a mounting portion 34a with the tip of the male screw portion 32a is provided on the brake mounting member 34.

With this configuration, when the adjustment knob 32 is manually tightened, the tip of the adjustment knob 32 comes into contact with the gantry portion 34a, and the sliding portion 33 responds to the adjustment knob 32, and the press-contact surface 33b and the press-contact surface 34b is pressed to fix the brake position.

Further, in the wheelchair brake adjusting device of the present invention, the brake position can be fixed even if the above-mentioned press contact surface is vertically provided in the sliding direction.

[0018]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 6 show a wheelchair brake adjusting device to which the first embodiment of the present invention is applied. This wheelchair brake adjusting device includes a brake mounting member 6 fixed to a wheelchair, a brake presser 1 with a handle slidably fixed to the brake mounting member 6, a brake mounting member 6 and a brake with a handle. It has a sliding portion 5 provided with a lever mounting portion 5a protrudingly provided so as to sandwich the holding member 1 from both side surfaces, and a lever 2 in which the support shaft 3 is eccentric. Although not shown in the present example, in order to prevent rotation of the brake presser 1 with handle, the side of the presser 1 with handle 1 that comes into contact with the brake mounting member 6 has a long hole 6a. The provision of the slidably protruding projection constitutes a wheelchair brake.

In the present invention, one of the long holes 6a provided in the brake mounting member 6 is provided obliquely with respect to the longitudinal direction of the lever mounting portion 5a which is parallel to the pressure direction when the brake position is fixed. The pressure contact surface 6b is provided, and the lever mounting portion 5a is inserted into the long hole 6a so that the pressure contact surface 5b of the sliding portion 5 which is similarly inclined is fitted to the pressure contact surface 6b. Further, the lever mounting portion 5a is inserted into the hole 1a of the brake retainer 1 with a handle, and is fixed to the support shaft 3 of the lever 2 by the bolt shaft 4. That is, the lever 2 with the eccentric shaft 3 is slid to one side, so that the press-contact surface 5b of the sliding portion 5 and the lever 2 via the lever mounting portion 5a allow the brake mounting member 6 and the brake presser 1 with handle to be held. Can be pinched. In this example, as shown in FIG. 4, the press contact surface 5b and the press contact surface 6b are inclined at about 45 degrees with respect to the pressure direction. This is performed in order to further increase the surface pressure of the press contact surface 5b and the press contact surface 6b, and does not particularly limit the angle. The length of the lever 2 and the adjustment knob of each embodiment described later are not limited. The angle may be determined in consideration of the size and shape of the object and the force applied during operation. Further, even if the press contact surface 5b and the press contact surface 6b are vertically provided in the pressure direction, the same effect can be obtained although the surface pressure is reduced. This also applies to an embodiment described later.

The wheel having such a configuration has the following advantages as compared with a wheelchair brake which is fixed or moved by a conventional bolt and nut as shown in FIG. In other words, the brake position can be fixed and moved immediately by simply operating the eccentric lever 2 of the support shaft 3, so that when the air pressure of the wheel (tire) to be locked is decreasing, or when the wheel is raining, When the brake work is deteriorated due to wet tires, the brake work can be adjusted immediately without using tools.

Also, as compared with a conventional wheelchair brake that engages with the rotation of the male screw shaft 54 as shown in FIG. There are advantages such as: That is, since the sliding portion 5 is brought into surface contact with the brake mounting member 6 by operating the lever 2 when the brake position is fixed, the clearance between the brake case 52 and the sliding portion 53 is reduced as in a conventional wheelchair brake. However, it is not necessary to perform precision processing to suppress the vibration of the brake retainer with handle 51, and the vibration of the brake retainer with handle 1 can be eliminated, so that the manufacturing cost can be reduced and the product unit price can be reduced. I can do it.

FIG. 7 is a diagram showing a wheelchair brake adjusting device to which the second embodiment of the present invention is applied. Also in this embodiment, the brake holding tool 1 with handle, the sliding portion 5 and the brake mounting member 6 are used. In this embodiment, instead of the lever mounting portion 5a, an adjusting knob mounting portion 5C in which a male screw is threaded is used. , And an adjustment knob 22 having a screw hole 22a instead of the lever 2.

In the present invention, the adjusting knob mounting portion 5C obtained by threading the male screw of the sliding portion 5 is inserted into the elongated hole 6a and the hole 1a of the brake presser 1 with handle as in the above embodiment. Further, the screw is inserted into the screw hole 22a of the adjustment knob 22.

With such a configuration, the same effect as in the above embodiment can be obtained by tightening or loosening the adjustment knob 22.

FIGS. 8 and 9 show a wheelchair brake adjusting device to which a third embodiment of the present invention is applied. In this embodiment, an adjusting knob 32 having an external thread portion 32a, a brake presser 31 with a handle, a sliding portion 33 having a stay 33b for mounting the brake presser 31 with a handle, and a brake having a gantry portion 34a. It is composed of a mounting member 34.

In the present invention, the brake retainer 31 with a handle is operably mounted on the stay 33 b of the sliding portion 33, and the sliding portion 33 is loosely inserted into the brake mounting member 34. Further, the male screw portion 32a of the adjustment knob 32 is screwed into the screw hole 33a formed through the sliding portion 33.

With such a configuration, by tightening the adjustment knob 32, the tip of the male screw portion 32a comes into contact with the gantry portion 34a. When the adjustment knob 32 is further tightened, the sliding portion 33 responds, and with the contact surface between the gantry portion 34a and the tip of the male screw portion 32a as a fulcrum, the brake mounting member 34 is formed by the crimping surface 33b of the sliding portion 33. The pressing surface 34b is pressed and fixed. Further, by loosening the adjustment knob 32, the pressure applied to the crimping surface 34b of the brake mounting member 34 is released, and the sliding portion 33 becomes slidable, so that the brake position can be adjusted. Further, since the manufacturing cost can be reduced for the same reason as in the above-described embodiment, the product unit price can be reduced.

[Effects of the Invention] By using the present invention, when the tire pressure is low or the braking ability is deteriorated in rainy weather, etc., the brake position can be adjusted immediately without preparing tools, and the brake can be adjusted. It is possible for the user to get on and off the wheelchair safely because it is possible to keep the dominance of the vehicle in the best condition.

Further, when the brake position is fixed, the brake mounting member and the holding member for the brake with the handle are sandwiched between the lever and the sliding portion, so that the holding member for the brake with the handle vibrates like a conventional brake. Noise and vibration during running can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wheelchair brake adjusting device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the wheelchair brake adjusting device shown in FIG. 1;

FIG. 3 is a right side view of the wheelchair brake adjusting device shown in FIG. 1;

FIG. 4 is a sectional view of a portion A in FIG. 3;

FIG. 5 is a front view of the wheelchair brake adjusting device shown in FIG. 1;

FIG. 6 is a side view showing a use state of the wheelchair brake adjusting device shown in FIG. 1;

FIG. 7 is an exploded perspective view of a wheelchair brake adjusting device according to a second embodiment of the present invention.

FIG. 8 is an exploded perspective view of a wheelchair brake adjusting device according to a third embodiment of the present invention.

FIG. 9 is a front view of the wheelchair brake adjusting device shown in FIG. 8;

FIG. 10 is a right and left side view showing one conventional wheelchair brake.

FIG. 11 is a perspective view and an exploded perspective view showing two conventional wheelchair brakes.

[Explanation of symbols]

1, 31, 41 Holder for brake with handle 1a Hole 2 Lever 3 Support shaft 4 Bolt shaft 5, 33 Sliding part 5a Lever mounting part 5b, 6b, 32b, 34b Pressure contact surface 5c Adjusting knob mounting part 6, 34 Brake mounting Member 6a, 43 Long hole 22, 32 Adjusting knob 22a Screw hole 32a Male screw part 33b Stay 34a Mount part 42 Plate member 44 Bolt 45 Nut 46 Wheelchair frame

Claims (4)

[Utility model registration claims] 1. A sliding part for attaching a brake presser with a handle to a brake mounting member having a long hole,
A pressure contact surface of the brake mounting member and the sliding portion is inclined with respect to the pressure direction, and a lever mounting portion is provided on the sliding portion substantially perpendicular to the sliding direction to support the lever mounting portion. A wheelchair brake adjusting device comprising a lever having an eccentric shaft. 2. A wheelchair brake adjusting device according to claim 1, further comprising: an adjusting knob mounting portion formed by threading a male screw in place of said lever mounting portion, wherein said adjusting knob mounting portion has a screw hole. A wheelchair brake adjusting device comprising: 3. The wheelchair brake adjusting device according to claim 1, wherein a screw hole substantially perpendicular to a sliding direction is formed in the sliding portion instead of the lever mounting portion, and a male screw is formed in the screw hole. A brake adjustment device for a wheelchair, comprising: an adjustment knob having a portion; and a pedestal portion provided with a tip of the male screw portion on the brake mounting member. 4. The wheelchair brake adjusting device according to claim 1, wherein the pressure contact surface is vertically provided in a pressure direction.