JP2009126377A - Braking mechanism for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a braking mechanism for a vehicle such as a carriage and a wheelchair. <P>SOLUTION: A brake shoe 19 is installed on a brake control rod 15 that is turnable in such a way as to be capable of abutting on a wheel. A right and left control rod 10 and a forward-backward control rod are coupled to each other by a connector by which both the right and left control rod 10 and the forward-backward control rod 30 are turnable as either one of them is turned. As the right and left control rod 10 is rotated, the brake control rod 15 is turned, and the brake shoe is abutted on the wheel to brake it. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a brake mechanism for a vehicle such as a carriage or a wheelchair.

Conventionally, taking a cart for carrying luggage as an example, 3 to 4 wheels are attached, and the luggage is carried almost horizontally by pushing the handle.
However, if a cart is placed on an inclined road or the like, the cart travels on an inclined road, so a brake is required as a safety device, but many of them are mechanisms that press the wheels themselves, and the braking performance is insufficient. It may become. Thus, as an example of a carriage having a brake mechanism that can be stopped reliably, Japanese Patent Laid-Open No. 2002-81474 is disclosed.

JP 2002-81474 A

Japanese Patent Laid-Open No. 2002-81474 discloses an example of a carriage with a brake. This brake operation is performed via a step on the rear side of the carriage.
However, depending on the carriage, it may be convenient to operate on the left and right sides, that is, on either side of the four directions in addition to the front and rear of the carriage.
Therefore, the present application provides a vehicle that can perform a brake operation from both the front and rear sides and the left and right sides.

The means of the present invention will be described based on an embodiment. The vehicle according to claim 1 is a vehicle having at least front and rear wheels, and a brake shoe 19 that can contact the wheels is provided on a rotatable brake operating rod 15. It is installed.
Further, when either one of the left and right operation rods 10 and the front and rear operation rods 30 is rotated, both the left and right operation rods 10 and the front and rear operation rods 30 are coupled by a rotatable connecting body. As the left and right operating rods 10 rotate, the brake operating rod 15 rotates, and the brake shoes come into contact with the wheels to form a brake.

The connecting body 35 attached to the vehicle of claim 2 includes a U-shaped Y transmission arm 37 that is inclined to the front / rear operation rod 30 and is rotatably attached to a fixed base 36, and the left / right operation rod. 10 is composed of a bar-shaped X transmission arm 38 fixed to the base 10. By inserting the X transmission arm 38 into the Y transmission arm 37, when either the left / right operation rod 10 or the front / rear operation rod 30 is rotated, both the X transmission arm 38 and the Y transmission arm 37 are moved. It rotates and the structure of this connection body 35 is simple.
Further, in the vehicle according to claim 3, the convex mirror cam 16 is attached to the left and right operating rod 10, and the rotating rod 18 that can contact the convex mirror cam 16 is attached to the brake operating rod 15, so The movement turns the rotary rod 18.
According to a fourth aspect of the present invention, an intermediate wheel is provided between the front and rear wheels, and the intermediate wheel is braked by a brake shoe.

  Brake operation can be performed from the front and rear sides of the vehicle as well as from the left and right sides.

Referring to FIG. 1 showing a plane from which a base plate of a carriage is removed, FIG. 2 showing an AA arrow view of FIG. 1, and FIG. 3 showing an BB arrow view of FIG. explain.
The main body 1 of the carriage is composed of a rectangular frame frame 2, and a base plate made of thin steel plate or resin is fixed on the frame frame 2.
Further, a wheel plate 4 is attached to extend to the frame 2, a front wheel plate 4 a of the free wheel is attached to the front wheel plate 4, and a rear wheel 3 b of the free wheel is attached to the rear wheel plate 4. . Further, between the front wheel 3a and the rear wheel 3b, an intermediate wheel 3c is attached to a wheel plate 4 together with a brake mechanism described later.

Below the frame 2 and in the left and right direction, left and right operation rods 10 are rotatably attached via left and right support members 10a, and right and left petals 11 and left petals are attached to both ends of the left and right operation rods 10, respectively. 12 is attached.
When the left side of the right petal 11 is stepped on, the intermediate wheel 3c is braked by the rotation of the left and right operation rod 10, and when the right side is stepped on, the brake is released. On the other hand, when the right side of the left petal 12 is stepped on, the intermediate wheel 3c is braked by the rotation of the left and right operation rod 10, and when the left side is stepped on, the brake is released.

Next, the brake mechanism will be described with reference to FIG. 2 (see arrows A to A in FIG. 1). A brake operation rod 15 is disposed below the left and right operation rods 10. Is arranged so as to be pivotable from the frame 2 to a support 10a that is suspended.
A convex mirror cam 16 is attached to the left and right operation rods 10 below the intersection of the left and right operation rods 10 and the below-mentioned front and rear operation rods 30. The convex mirror cam 16 attached to the left and right operation rod 10 rotates.

On the other hand, a rotary rod 18 provided with an adjusting screw 18a is attached at a position corresponding to the convex mirror cam 16 so as to be able to contact the brake operating rod 15.
Therefore, depending on the position of the convex mirror cam 16, the brake operating rod 15 rotates clockwise or counterclockwise.
Also, the brake operating rod 15 is provided with a brake shoe 19 that acts as a brake by pressing the intermediate wheel 3c via an attachment member 19a. By the clockwise rotation of the brake operating rod 15, The brake is applied, and the brake is released by turning counterclockwise.

  The brake operating rod 15 is provided with a lower spring mounting body 17a projecting rearward, while an upper spring mounting body 17b is fixed to the wheel plate 4 of the intermediate wheel 3c on the frame frame 2. A spring 20 is stretched between the lower spring mounting body 17a and the upper spring mounting body 17b, and when the brake shoe 19 is released from the brake state, the spring 20 is attached to the intermediate wheel 3c. This spring 20 is not always necessary.

On the other hand, a front / rear operation rod 30 is rotatably attached via a front / rear support body (not shown) in the front / rear direction (perpendicular to the left / right operation rod 10) below the frame 2. A front petal 31 and a rear petal 32 are attached to both ends of the operation rod 30.
Further, the front / rear operation rod 30 and the left / right operation rod 10 are connected by a connecting body 35 at a substantially central portion of the frame 2.
The connecting body 35 includes a U-shaped Y transmission arm 37 inclined to the front / rear operation rod 30 and rotatably attached to a fixed base 36, and a rod-shaped X transmission arm fixed to the left / right operation rod 10. This rod-shaped X transmission arm 38 is inserted into the U-shaped Y transmission arm 37.

The Y transmission arm 37 can be rotated with respect to the base 36 (or the front / rear operation rod 30) because the front / rear operation rod 30 and the left / right operation rod 10 rotate with respect to each other. This is to cope with moving.
Accordingly, when the front / rear operation rod 30 is rotated, the Y transmission arm 37 is rotated. This rotation rotates the X transmission arm 38 and the left / right operation rod 10 is rotated. That is, when either the front / rear operation rod 30 or the left / right operation rod 10 is rotated, the front / rear operation rod 30 and the left / right operation rod 10 are both rotated.
Then, the rotation of the left and right operation rod 10 rotates the convex mirror cam 16 and also rotates the brake operation rod 15 via the rotation rod 18 so that the brake shoe 19 performs a brake operation or a release operation.

  That is, when the left side of the front petal 31 is stepped on, the front / rear operation rod 30 is rotated to brake the intermediate wheel 3c, and when the right side is stepped on, the brake is released. Further, when the right side of the rear petal 32 is stepped on, the front / rear operation rod 30 is rotated to brake the intermediate wheel 3c, and when the left side is stepped on, the brake is released.

As described above, the right side petal 11 and the left side petal 12, the front side petal 31 and the rear side petal 32 are arranged on each side of the frame frame 2. Brake operation is possible.
Instead of the petal, the left and right operation rods 10 and the front and rear operation rods 30 may be rotated.
The Y transmission arm 37 is attached to the front / rear operation rod 30 and the X transmission arm 38 is attached to the left / right operation rod 10, but the Y transmission arm 37 is attached to the left / right operation rod 10 and the X transmission arm 38 is moved back and forth. The structure attached to the operating rod 30 may be sufficient.

Next, the brake operation of the above configuration will be described.
First, when the left side of the right petal 11 is stepped on, the left / right operation rod 10 rotates clockwise. The convex mirror cam 16 is turned to the top by the rotation of the left and right operation rods 10, the brake operation rod 15 is rotated clockwise, and the brake shoe is pressed toward the intermediate wheel 3c to be braked. become.
On the other hand, if the right side of the right side petal is stepped on, the reverse action will occur, and the top of the convex mirror cam 16 will be disengaged, and the tension of the spring 20 will cause the brake operating rod 15 to rotate counterclockwise. Then, the brake shoe is detached from the intermediate wheel 3c and the brake is released. The same applies to the left side petal 12.

Next, when the left side of the front petal 31 is stepped on, the front / rear operation rod 30 (X transmission arm 38) rotates counterclockwise, and the Y transmission arm 37 (left / right operation rod 10) is rotated clockwise by the connecting body 35. Rotate.
As a result, the convex mirror cam 16 attached to the left and right operating rods 10 becomes the top, and the brake operating rod 15 is rotated clockwise to press the brake shoe toward the intermediate wheel 3c and the brake is applied.
On the other hand, when the right side of the front petal 31 is stepped on, the brake shoe is detached from the intermediate wheel 3c and the brake is released, acting reversely to the above. The same applies to the rear petal 32.

As described above, the present invention enables the brake operation from either the front, rear, left, or right side of the vehicle. However, the present invention may be configured so that the operation can be performed only on one side of the front and rear, or one of the left and right sides.
In the present invention, the left and right operating rods 10 and the front and rear operating rods 30 rotate with respect to each other via the connecting body 35, but may be configured with other transmission mechanisms using worm gears or the like. In addition, the present application is a structure in which an intermediate wheel is provided between the front and rear wheels, and the brake mechanism is attached to the intermediate wheel by a brake shoe, but the brake mechanism is attached to either or both of the front and rear wheels. There may be.

It is a figure which shows the plane which removed the base plate of the trolley | bogie. It is a figure which shows the AA arrow of FIG. It is a figure which shows the BB arrow of FIG.

Explanation of symbols

1 Main body 3a of the bogie 3a Front wheel 3b Rear wheel 3c Intermediate wheel 10 Left and right operation rod 15 Brake operation rod 16 Convex mirror cam 18 Rotation rod 19 Brake shoe 30 Front and rear operation rod 35 Linkage body 37 Y transmission arm 38 X transmission arm

Claims (4)

A vehicle having at least front and rear wheels,
Attach a brake shoe that can contact the wheel to a rotatable brake operation rod,
A rotatable left and right operation rod is provided perpendicular to the rotatable front and rear operation rod,
When either one of the left and right operation rods and the front and rear operation rods rotate, both the left and right operation rods and the front and rear operation rods are coupled by a rotatable connecting body,
A vehicle in which the brake shoe comes into contact with a wheel to become a brake by the rotation of the brake operation rod through the rotation of the left and right operation rods. The connecting body is composed of a U-shaped Y transmission arm that is tilted to the front and rear operation rods and rotatably attached to a fixed base, and a rod-shaped X transmission arm that is fixed to the left and right operation rods.
The vehicle, wherein the X transmission arm is inserted into the Y transmission arm.   3. The vehicle according to claim 1, wherein a convex mirror cam is attached to the left and right operating rods, and a rotating rod capable of contacting the convex mirror cam is attached to the brake operating rod. The vehicle according to any one of claims 1 to 3, wherein an intermediate wheel is provided between the front and rear wheels, and the intermediate wheel is braked by a brake shoe.