JP3863705B2 - Casters with resistors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a caster with a resistor capable of giving a resistance that increases stepwise to rotation of a wheel.
[0002]
[Prior art]
Conventionally, in a caster, the rotation of a wheel is restrained by a braking mechanism, and the wheel is stationary.
However, when the caster is used while suppressing the rotational force of the wheels, it cannot be performed by the braking mechanism.
[0003]
[Problems to be solved by the invention]
The present invention was devised in view of the above circumstances, and its main problem is that the rotational performance of the wheel can be varied by changing the resistance given to the wheel stepwise by the tilt angle of the operation lever. It is an object of the present invention to provide a caster with a resistor which is adjusted by lowering the position of the brake shoe when the brake shoe is worn so that the same amount of resistance can be given by operating an operation lever.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides
An operation lever having a base end pivotally attached to the support yoke and extending substantially horizontally, a pressure device having an upper part pivotally attached to the middle of the operation lever, and a pressure applied by tilting the operation lever fixed to the support yoke A caster with a resistor provided with a guide portion that regulates the device to slide up and down,
The operation lever is disposed in the support yoke, and is provided with a lock shaft that is urged toward the proximal end of the operation lever and is slidable within a predetermined range.
Both side walls of the support yoke are provided with lock holes that allow the lock shaft to move in accordance with the tilt stroke of the operation lever and that can be locked to the lock shaft at a plurality of predetermined tilt positions. And
A pressurizing device is pivotally attached to the operation lever, and is vertically attached to the holder portion so as to be slidable with a certain stroke up and down below the holder portion. Divided slider part formed to be height adjustable, and a biasing means such as a spring that is interposed between the upper part of the slider part and the holder part and biases the slider part downward when the operation lever is pushed down And a brake plate portion that is provided so as to be interlocked with a vertical movement of the lower portion of the slider portion and has a brake shoe fixed to a lower end thereof, and a tip is abutted against the side wall of the lower portion of the slider portion, and is held by the brake plate portion. An adjustment member that can move forward and backward to move the lower part of the slurder part laterally to adjust the height of the entire slider part, and is fixed to the brake plate part and the slider part Has become a brake shoe that can be displaced to the lower end position by the height adjustment,
The operation lever is pushed down and tilted, and the brake shoe pressed by the pressurizing device is pressed against the disk formed integrally with the wheel, increasing the resistance stepwise with respect to the rotation of the wheel, leading to braking. Take technical measures.
In the invention of claim 2,
A pair of left and right pressurizing slots is formed in the holder part, and a braking slot that is aligned with the pressurizing slot is formed in the slider part, and the pressurizing slot and the braking slot are The slider part is slidably attached via the pin to be inserted,
Technical measures are taken.
Furthermore, in the invention of claim 3,
A long hole is formed in the middle of the operation lever and outward from the pivot position of the holder portion, and the lock shaft is slidably fitted, and the lock shaft is biased in the direction of the pivot position. ,
A lock hole is formed in both side walls of the support yoke and is fitted to both ends of the lock shaft. The lock hole extends inward along the extending direction of the lock shaft. A technical measure is taken that a plurality of recesses capable of locking the lock shaft are formed side by side.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of a caster with a resistor according to the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 6, the caster with a resistor has an operation lever 2 whose base end is pivotally attached to the support yoke 1 and extends substantially horizontally, and an upper portion is pivotally attached to a middle position of the operation lever 2. The pressure device K is P2 and a guide portion 18 that is fixed to the support yoke 1 and regulates the pressure device K to slide up and down by the tilting of the operation lever 2.
[0006]
In other words, the operation lever 2 has a main portion disposed in the support yoke 1 having a channel-shaped cross section, and a grip 23 at the tip protrudes outward.
The operating lever 2 is provided with a lock shaft 15 that is urged in the proximal direction and is slidable within a predetermined range.
Here, at the midway position of the operation lever 2, a long hole 30 is formed outward from the pivot position P2 of the pressurizing device K, and the lock shaft 15 is slidably fitted.
A coil spring 12 is spanned between the lock shaft 15 and the pivot P2 of the pressurizing device K, and is biased in the direction of the pivot position P2.
[0007]
The lock shaft 15 is movable on both side walls of the support yoke 1 in accordance with the tilt stroke of the operation lever 2 and the operation lever 2 is moved to a plurality of predetermined tilt positions (in the illustrated example, from 0 position to 3). A lock hole 31 that can be locked to the lock shaft 15 is formed at four positions up to the position).
The lock holes 31 are fitted to both ends of the lock shaft 15, and extend inward and perpendicular to the extending direction of the lock hole 31 to lock the lock shaft 15. A plurality of (four) concave portions 32 are formed side by side (see FIG. 6).
[0008]
In this embodiment, the recess 32 is provided with 0 position without resistance (braking release state) and 3 positions of the braking position with the maximum resistance at the both ends of the lock hole 31, and the resistance gradually increases in the middle 1 However, this stage is not limited to the illustrated example and may be set to any number of stages.
Since the lock shaft 15 is always urged toward the center by the urging means such as the spring 12, when the operation lever 2 is engaged with the recess 32 at the 0-3 position, the operation lever 2 is moved by the urging force. Held in the engaged position.
Reference numeral 35 denotes a long hole through which the pivot P2 that is displaced according to the tilt of the operation lever 2 is passed.
[0009]
Next, as is clearer in FIG. 7, the pressurizing device K is fixed up and down with respect to the holder portion 3 pivotally attached to the operation lever 2 and below the holder portion 3. The slider part 8 is slidably attached with a stroke of the upper part 8a and is divided into an upper part 8a and a lower part 8b so as to be in contact with an inclined surface, and is formed to be adjustable in height, and the upper part 8a of the slider part 8 and a holder When the operating lever 2 is pushed down by being interposed between the coil member 11 and the coil spring 11, the coil spring 11 that urges the slider member 8 downward is attached to the lower end of the slider member 8 so as to be interlocked with the vertical movement of the lower part 8b. And a brake plate portion 4 to which a brake shoe 6 is fixed.
[0010]
Here, the holder portion 3 is formed with a pair of left and right pressurizing elongated holes 33, and the slider portion 8 is formed with a braking elongated hole 34 that aligns with the pressurizing elongated hole 33.
The slider portion 8 is slidably attached to the holder portion 3 through a pin 13 fitted into the pressurizing elongated hole 33 and the braking elongated hole 34.
[0011]
Next, the slider portion 8 has an upper portion 8a and a lower portion 8b. The upper portion 8a has an inverted substantially right triangle shape, and the lower portion 8b has a substantially right triangle shape. Thus, the upper and lower inclined surfaces are in contact with no gap.
The brake plate part 4 is provided with an adjusting bolt (hexagonal socket bolt in the illustrated example) 9 as an example of an adjusting member that extends to the side of the lower part 8b of the slider part 8 and whose tip abuts against the side wall of the lower part 8b. It is held so that it can be screwed back.
Reference numeral 5 denotes a nut that is fixed to the angle wall of the brake plate portion 4 and screws the adjustment bolt 9, and 14 is a pin for hooking the lower portion 8 b to the slider portion 8.
The brake plate portion 4 is attached so as to be interlocked with the vertical movement of the lower portion 8b of the slider portion 8 and not interlocked with the movement of the slide in the lateral direction.
The adjusting bolt 9 is protected by a cover portion 10 integrated with the brake plate portion 4, and can be moved forward through the opening 10a by rotating the adjusting bolt 9 with a screwdriver or the like.
[0012]
Therefore, if the lower part 8b is slid in the horizontal direction by the rotation of the adjusting bolt 9, the lower part 8b is lowered by the inclined surface, and the entire height of the slider part 8 can be adjusted (see FIG. 7).
As a result, the brake shoe 6 can be lowered via the brake plate portion 4 in conjunction with the lowering of the lower portion 8b.
Therefore, even when the brake shoe 6 is worn and thinned, the slider portion 8 can be adjusted to be higher so that the lower end of the brake shoe 6 is at the same position as the initial position, so that the amount of displacement by the operation lever 2 is constant. However, regardless of the wear of the brake shoe 6, the position where the brake shoe 6 acts can be maintained constant.
[0013]
On the other hand, a brake disk 24 is integrally fixed to the wheel 26 pivotally supported by the support yoke 1 by a bolt 25 coaxially therewith, and the brake shoe 6 presses the brake disk 24 to rotate it. Is configured to provide resistance.
[0014]
Since the control lever 2 is configured as described above, the operation lever 2 is held at the brake release position where the brake shoe 6 is separated from the brake disc 24 at the 0 position of the lock hole 31 shown in FIG. Rotates freely.
Therefore, when the operation lever 2 is removed from the locking recess 32 at the 0 position and is pushed down to the recess 32 at the 1 position shown in FIG. 2 in the braking direction and tilted, the holder portion 3 and the slider portion 8 are regulated by the guide portion 18. And descend in a vertical position.
[0015]
When the tip of the brake shoe 6 abuts on the brake disc 24 and further descends, only the holder portion 3 is lowered while the slider portion 8 remains in the above posture.
This is because, since the pressurizing long hole 33 of the holder part 3 is lowered, the pin 13 does not collide with the holder part 3 and does not interlock.
As a result, the coil spring 11 is compressed, and the repulsive force acts on the slider portion 8 to become the pressing force of the brake shoe 6 against the brake disc 24.
[0016]
Further, when the operation lever 2 is lowered to the two positions of the lock hole 31, the slider portion 8 is maintained in the above-mentioned posture by the same action as described above, and only the holder portion 3 is lowered.
As a result, the coil spring 11 is further strongly compressed, and the repulsive force increased thereby acts on the slider portion 8 to press the brake shoe 6 against the brake disc 24 more strongly and increase the resistance.
[0017]
When the operating lever 2 is lowered to the third position beyond the two positions of the lock hole 31, the upper end of the pressurizing long hole 33 of the holder portion 3 abuts with the pin 13, and this pin 13 is moved to the lower end of the brake long hole 34. When the pin 13 comes into contact with the lower end, the slider portion 8 is pushed downward together with the holder portion 3.
As a result, the brake shoe 6 strongly presses the brake disc 24 and brakes, so that the wheel 26 is completely braked and stops (see FIG. 3).
Since the reverse operation is performed when the brake is released, the description thereof is omitted.
[0018]
In this way, gradually increasing pressure is applied to the brake disc 24 from the 1st position to the 3rd position of the locking recess 32 in the braking direction, and the resistance to rotation of the wheels 26 is increased stepwise until braking. Can do.
[0019]
【The invention's effect】
In the caster with a resistor according to the present invention, the rotational performance of the wheel can be varied by changing the pressure applied to the wheel. For example, the caster as a suspension of a rehabilitation device or other wheels is given resistance. Therefore, it can be applied as a caster for a bogie that needs to adjust the degree of sliding.
[Brief description of the drawings]
FIG. 1 is a side view of a caster with a resistor in a no-resistance state (0 position).
FIG. 2 is a side view of the caster with the resistor at one position.
FIG. 3 is a side view of a caster with the same resistor in a maximum resistance state (3 positions).
4 is a front view of FIG. 1. FIG.
FIG. 5 is a plan view of FIG. 1;
6 is a side view of FIG. 1. FIG.
FIG. 7 is a partial side view showing the height adjustment of the slide portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support yoke 2 Operation lever 3 Holder part 4 Brake board part 6 Brake shoe 8 Slider part 9 Adjustment bolt 10 Cover part 11 Coil spring 13 Pin 15 Lock shaft 18 Guide part 23 Grip 24 Brake disk 26 Wheel

Claims (3)

An operation lever having a base end pivotally attached to the support yoke and extending substantially horizontally, a pressure device having an upper part pivotally attached to the middle of the operation lever, and a pressure applied by tilting the operation lever fixed to the support yoke A caster with a resistor provided with a guide portion that regulates the device to slide up and down,
The operation lever is disposed in the support yoke, and is provided with a lock shaft that is urged toward the proximal end of the operation lever and is slidable within a predetermined range.
Both side walls of the support yoke are provided with lock holes that allow the lock shaft to move in accordance with the tilt stroke of the operation lever and that can be locked to the lock shaft at a plurality of predetermined tilt positions. And
A pressurizing device is pivotally attached to the operation lever, and is vertically attached to the holder portion so as to be slidable with a certain stroke up and down below the holder portion. Divided slider part formed to be height adjustable, and a biasing means such as a spring that is interposed between the upper part of the slider part and the holder part and biases the slider part downward when the operation lever is pushed down And a brake plate portion that is provided so as to be interlocked with a vertical movement of the lower portion of the slider portion and has a brake shoe fixed to a lower end thereof, and a tip is abutted against the side wall of the lower portion of the slider portion, and is held by the brake plate portion. An adjustment member that can move forward and backward to move the lower part of the slurder part laterally to adjust the height of the entire slider part, and is fixed to the brake plate part and the slider part Has become a brake shoe that can be displaced to the lower end position by the height adjustment,
The operation lever is pushed down and tilted, and the brake shoe pressed by the pressurizing device is pressed against the disc formed integrally with the wheel, and the resistance is gradually increased with respect to the rotation of the wheel, resulting in braking. A caster with a resistor. A pair of left and right pressurization elongated holes are formed in the holder portion, and a brake oblong hole is formed in the slider portion to be aligned with the pressurization oblong hole. The caster with a resistor according to claim 1, wherein the slider portion is slidably attached via a pin to be inserted. A long hole is formed outward from the pivoting position of the holder portion in the middle of the operation lever, and the lock shaft is slidably fitted, and the lock shaft is urged in the direction of the pivot position,
A lock hole is formed in both side walls of the support yoke and is fitted to both ends of the lock shaft. The lock hole extends inward along the extending direction of the lock shaft. The caster with a resistor according to claim 1, wherein a plurality of recesses capable of locking the lock shaft are formed side by side.

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