JPH0616002A - Brake mechanism of a caster - Google Patents

Abstract

PURPOSE:To enable pedals to be operated from the same direction by arranging a brake release pedal and a brake pedal in front in front of and above a frame and arranging a mesh claw of a brake body below radial slits of a seat bottom. CONSTITUTION:An engaging unit 5 having radial slits 4 is provided at the bottom of a base seat 1 provided with a rotatable frame 2, and a brake release pedal 6, a brake pedal 7 and a brake body 8 are mounted swingably in front of and above the frame 2. The brake release pedal 6 having a press part 6b is journalled on a shaft (a) to the upper cover 2b of the frame 2, and the brake pedal 7 having a press part 7a is journalled on a shaft (b). The brake pedal 7 and the brake body 8 are journalled on a shaft (c) so that the shaft (b) may be movable to both sides of the straight line L connecting the shaft (a) to the shaft (c), the brake body 8 is capable of making contact with a wheel 3 at its contact part 8a, and an engaging claw 8 of the other end of the brake body 8 is arranged below radial slits 4 together with a spring 10. This results in operating the pedals from the same direction and preventing contact of pedals with each other in the case when a caster approaches.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking mechanism for casters used in transport machinery, shopping carts and other transport vehicles, and more particularly to a caster capable of simultaneously braking the rotation of a frame and the rotation of wheels. The present invention relates to the braking mechanism.

[0002]

2. Description of the Related Art Conventionally, in this type of caster braking mechanism, as shown in FIGS. 13 and 14, for example, a frame 2 is pivotally mounted on a pedestal 20, and wheels 3 are rotatably mounted on the frame 2. It is pivotally supported. Then, the front gate-shaped braking body 23 having the contact portion 21 and the bent opposite leg portion 22 is straddled over the wheel 3 with the steel wire, and the contact portion 21 is slid into the braking body engaging groove 24 of the frame 2. The lower end of the opposite leg 22 is coupled to the frame 2 at a position offset from the axial support of the axle 25 of the operation pedal 19 which is swingably attached to the frame 2 about the axle 25. There is. In addition, on the upper part of the wheel 3 between the frames 2,
A frame swivel prevention plate 29, which pivotally connects one end to a part of the contact portion 21 and disengages the engaging claw 26 at the other end from the radial cut groove 28 on the holding body 27, is swingably mounted around the pin 30. ing.

In the conventional caster braking mechanism constructed as described above, the brake pedal 23 is pulled down under the guidance of the brake body engaging groove 24 by stepping on the operation pedal 19 to move the contact portion 21 to the outside of the wheel 3. It is brought into contact with a part of the circumference, and further, the opposing leg portion 22 is pulled in to extend and deform the bent portion to apply contact pressure by the spring action to brake the rotation of the wheel 3, and at the same time, the engaging claw 2 of the frame turning prevention plate 29.
6 is engaged with the radial notch 28 on the holder 27 to prevent the frame 2 from pivoting.

[0004]

However, in the above-mentioned conventional braking mechanism for casters, since the operation pedal 19 is provided from the front side to the side of the frame 2, the operation portions 19a and 19b thereof have the axial center of the axle 25. About 180 °
There is a problem that the operation pedal 19 is in an open position and the operation pedal 19 cannot be operated from the same direction, which makes the operation very troublesome.

When the conventional caster braking mechanism is applied to a caster of a shopping cart or the like, the operation pedals 19 project to the front and side of the frame 2, so that many shopping carts are stacked. There is a problem that the casters approach each other when they are stored together, and their operation pedals 19 come into contact and malfunction. Therefore, the present invention has been made to solve the problems of the conventional braking mechanism for casters.

[0006]

Therefore, in the caster braking mechanism of the present invention, a caster having wheels 3 rotatably mounted on a frame 2 pivotally mounted below a pedestal 1 is mounted on a lower portion of the pedestal 1. An engagement portion 5 having a radial cut groove 4 is provided, a brake release pedal 6 and a brake pedal 7 are arranged on an upper front portion of the frame 2, and a braking body 8 is swingably attached to an inner upper portion of the frame 2. The brake release pedal 6 is provided with a contact portion 6a with the frame 2, one end is used as a pressing portion 6b, the brake release pedal 6 is pivotally supported on the frame 2, and the brake pedal 7 is positioned below the shaft support point a. One end is pivotally supported, the braking pedal 7 is pivotally supported at one end of the braking body 8, and the other end of the braking pedal 7 is a pressing portion 7a.
A shaft fulcrum b between the brake release pedal 6 and the brake pedal 7 is movable to both sides of a straight line L connecting the shaft fulcrum a and the shaft fulcrum c between the brake pedal 7 and the brake body 8, and a contact portion is provided at one end of the brake body 8. 8a
Is provided, the contact portion 8a is arranged above the wheel 3, the engaging claw 8b is provided at the other end of the braking body 8, and the engaging claw 8b is arranged below the radial cut groove 4. .

Further, the caster braking mechanism according to the present invention includes a frame 2 which is pivotally mounted below a base 1.
In the caster to which the wheel 3 is rotatably attached, the engaging portion 5 in which the radial cut groove 4 is formed in the lower portion of the pedestal 1
And a brake release pedal 6 and a brake pedal 7 are provided on the front upper part of the frame 2, a brake body 8 is swingably mounted on the inner upper part of the frame 2, and a contact portion 6a is provided on the brake release pedal 6. , One end of which serves as a pressing portion 6b, the brake release pedal 6 is pivotally supported on the frame 2, and one end of the brake pedal 7 is pivotally supported at a position below the pivotal support point a. A grounding portion 7b for contacting the contact portion 6a is provided, the braking pedal 7 is pivotally supported on one end of the braking body 8, and the other end of the braking pedal 7 serves as a pressing portion 7a. The fulcrum b is a straight line L connecting the fulcrum a and the fulcrum c of the braking pedal 7 and the braking body 8.
Of the braking body 8 is provided with a contact portion 8a, and the contact portion 8a is arranged above the wheel 3,
An engaging claw 8b is provided at the other end of the braking body 8, and the engaging claw 8b is arranged below the radial cut groove 4.

Further, the caster braking mechanism of the present invention includes a frame 2 which is mounted below the base 1 so as to be rotatable.
In the caster to which the wheel 3 is rotatably attached, the engaging portion 5 in which the radial cut groove 4 is formed in the lower portion of the pedestal 1
Is provided, the brake release pedal 6 and the brake pedal 7 are arranged in the front upper part of the frame 2, the brake body 8 is swingably attached to the inner upper part of the frame 2, and one end of the brake release pedal 6 serves as a pressing portion 6b. Further, set the brake release pedal 6 to the frame 2
And one end of the braking pedal 7 is pivoted below the pivot point a, the braking pedal 7 is pivotally supported on one end of the braking body 8, and the other end of the braking pedal 7 is a pressing portion 7a. Further, the braking pedal 7 is provided with an abutting portion 7c for contacting the braking body 8, and the shaft fulcrum b between the brake release pedal 6 and the braking pedal 7 is the shaft fulcrum a.
And a contact portion 8a is provided at one end of the braking body 8 and the contact portion 8a is arranged above the wheel 3, An engaging claw 8b is provided at the other end of the braking body 8, and the engaging claw 8b is arranged below the radial cut groove 4.

[0009]

The caster braking mechanism of the present invention, having the above-mentioned means, has the following action. First, since the brake release pedal 6 and the brake pedal 7 are attached to the upper front part of the frame 2, the pedals can be operated from the same direction.

Further, since the brake release pedal 6 and the brake pedal 7 are attached to the upper front part of the frame 2,
When the casters approach each other, their pedals do not touch.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a brake mechanism for casters according to the present invention will be described below with reference to the drawings shown as embodiments. 1 to 4 show a first embodiment of a caster provided with a braking mechanism of the present invention, in which a wheel 3 is rotatably attached to a frame 2 rotatably attached below a pedestal 1. An engaging portion 5 having a radial cut groove 4 is provided in a lower portion of the pedestal 1, and a brake release pedal 6 and a braking pedal 7 are provided in an upper front portion of the frame 2. A braking body 8 is swingably attached to the upper inside of the frame 2. Reference numeral 1a is a support shaft fixed to the pedestal 1 as needed.

The brake release pedal 6 is provided with an abutting portion 6a with which the projection 2a of the frame 2 is abutted, and one end thereof is pressed by a pressing portion 6a.
b. Further, the brake release pedal 6 pivotally supports the central portion of the brake release pedal 6 on the upper cover 2b of the frame 2 and pivotally supports one end of the brake pedal 7 below the pivotal support point a. The brake pedal 7 has a substantially central portion pivotally supported on one end of a braking body 8 and the other end serving as a pressing portion 7a.

The brake release pedal 6 and the brake pedal 7
The axis fulcrum b of and is movable to both sides of the straight line L connecting the axis fulcrum a of the brake release pedal 6 and the frame 2 and the axis fulcrum c of the brake pedal 7 and the braking body 8. The braking body 8 is provided with a contact portion 8a at one end thereof, the contact portion 8a is disposed above the wheel 3, and an engaging claw 8b is provided at the other end thereof, and the engaging claw 8b is formed in a radial cut in the lower portion of the pedestal 1. It is arranged below the groove 4. Further, the braking body 8 is swingably attached to the frame 2 by pivotally supporting the substantially central portion of the braking body 8 to the upper inside portion of the frame 2 with a pin 9, and one end of the engaging claw 8b side is lowered by a spring 10. Always pressed in the direction. Further, the contact portion 8a is formed into a bifurcated shape having a substantially C-shape in the front-rear direction, so that the contact portion 8a can be rotated regardless of whether the wheel 3 is normally or reversely rotated.
The wheel 3 is designed to be easily grounded.

FIGS. 5 to 8 show a second embodiment of the caster having the braking mechanism of the present invention, and like the above-mentioned embodiment, a frame 2 pivotally mounted below the pedestal 1 is provided.
The wheel 3 is rotatably attached to the. An engaging portion 5 having a radial cut groove 4 is provided in a lower portion of the pedestal 1, and a brake release pedal 6 and a braking pedal 7 are provided in an upper front portion of the frame 2. A braking body 8 is swingably attached to the upper inside of the frame 2. 1
Reference numeral a is a support shaft fixed to the pedestal 1 if necessary.

The brake release pedal 6 is provided with an abutting portion 6a and the other end as a pressing portion 6b. Further, the brake release pedal 6 has a substantially central portion at the upper cover 2b of the frame 2.
In addition to being pivotally supported, one end of the braking pedal 7 is pivotally supported at a position below the pivotal support point a. The brake pedal 7 has a substantially central portion pivotally supported on one end of a braking body 8 and the other end serving as a pressing portion 7a. Further, the contact portion 6a of the brake release pedal 6 comes into contact with the brake pedal 7 to stop the contact portion 6a.
b is provided.

The brake release pedal 6 and the brake pedal 7
The axis fulcrum b of and is movable to both sides of the straight line L connecting the axis fulcrum a of the brake release pedal 6 and the frame 2 and the axis fulcrum c of the brake pedal 7 and the braking body 8. The braking body 8 is provided with a contact portion 8a at one end thereof, the contact portion 8a is disposed above the wheel 3, and an engaging claw 8b is provided at the other end thereof, and the engaging claw 8b is formed in a radial cut in the lower portion of the pedestal 1. It is arranged below the groove 4. Further, the braking body 8 is swingably attached to the frame 2 by pivotally supporting the substantially central portion of the braking body 8 to the upper inside portion of the frame 2 with a pin 9, and one end of the engaging claw 8b side is lowered by a spring 10. Always pressed in the direction. Further, the contact portion 8a is formed into a bifurcated shape having a substantially C-shape in the front-rear direction, so that the contact portion 8a can be rotated regardless of whether the wheel 3 is normally or reversely rotated.
The wheel 3 is designed to be easily grounded.

FIGS. 9 to 12 show a third embodiment of the caster having the braking mechanism of the present invention. Like the above-mentioned embodiment, the wheels are mounted on the frame 2 which is pivotally mounted below the base 1. 3 is rotatably attached. An engaging portion 5 having a radial cut groove 4 is provided in a lower portion of the pedestal 1, and a brake release pedal 6 and a braking pedal 7 are provided in an upper front portion of the frame 2. A braking body 8 is swingably attached to the upper inside of the frame 2. In addition,
Reference numeral 1a is a support shaft fixed to the pedestal 1 as needed.

The brake release pedal 6 has a pressing portion 6b at one end. Further, the brake release pedal 6 pivotally supports the central portion of the brake release pedal 6 on the upper cover 2b of the frame 2 and pivotally supports one end of the brake pedal 7 below the pivotal support point a. The brake pedal 7 has a substantially central portion pivotally supported on one end of a braking body 8 and the other end serving as a pressing portion 7a. Further, the brake pedal 7 is provided with a contact portion 7c with which the brake body 8 is abutted.

The brake release pedal 6 and the brake pedal 7
The axis fulcrum b of and is movable to both sides of the straight line L connecting the axis fulcrum a of the brake release pedal 6 and the frame 2 and the axis fulcrum c of the brake pedal 7 and the braking body 8. The braking body 8 is provided with a contact portion 8a at one end thereof, the contact portion 8a is disposed above the wheel 3, and an engaging claw 8b is provided at the other end thereof, and the engaging claw 8b is formed in a radial cut in the lower portion of the pedestal 1. It is arranged below the groove 4. Further, the braking body 8 is swingably attached to the frame 2 by pivotally supporting the substantially central portion of the braking body 8 to the upper inside portion of the frame 2 with a pin 9, and one end of the engaging claw 8b side is lowered by a spring 10. Always pressed in the direction. Further, the contact portion 8a is formed into a bifurcated shape having a substantially C-shape in the front-rear direction, so that the contact portion 8a can be rotated regardless of whether the wheel 3 is normally or reversely rotated.
The wheel 3 is designed to be easily grounded.

The caster braking mechanism of the present invention constructed as described above is operated as follows. First, in the first embodiment, in the state shown in FIG. 3, the contact portion 8a of the braking body 8 separates from the wheel 3 and the braking body 8
Of the engaging claw 8b is separated from the radial cut groove 4 of the pedestal 1, and in this state, one end of the engaging claw 8b side is constantly pressed downward by the spring 10, so that the braking body 8 swings. The braking mechanism is released and the casters do not brake.

Therefore, by pressing the pressing portion 7a of the braking pedal 7 from the released state of FIG. 3, the braking pedal 7 is rotated to the state shown in FIG. By this rotation, the shaft fulcrum b moves from the inner side to the outer side of the straight line L, the brake release pedal 6 rotates, the pressing portion 6b rises, and the contact portion 6 moves.
Since a hits the protrusion 2a of the frame 2, the braking pedal 7 stops at this position. Since one end of the braking body 8 is lowered by the rotation of the braking pedal 7, the contact portion 8a at one end of the braking body 8 contacts the surface of the wheel 3 and the rotation of the wheel 3 is braked. On the other hand, since the other end of the braking body 8 is raised by the rotation of the braking pedal 7, the engaging claw 8b at the other end of the braking body 8 is attached to the base 1.
It is caught in the radial notch 4 and the turning of the frame 2 is braked.

Next, by pressing the pressing portion 6b of the braking release pedal 6 from the braking state of FIG. 4, the braking release pedal 6 is rotated to the original state as shown in FIG. By this rotation, the shaft fulcrum b moves from the outer side to the inner side of the straight line L, the braking pedal 7 rotates, the pressing portion 7a rises, and the braking pedal 7 presses the pressing portion 6b of the braking release pedal 6.
The brake release pedal 6 stops at this position because the end of the brake hits. Then, the rotation of the brake pedal 7 raises one end of the braking body 8, so that the contact portion 8a at one end of the braking body 8 is separated from the surface of the wheel 3, and the braking of the rotation of the wheel 3 is released. On the other hand, since the other end of the braking body 8 is lowered by the rotation of the braking pedal 7, the engaging claw 8b at the other end of the braking body 8 is separated from the radial cut groove 4 of the pedestal 1, and the turning of the frame 2 is braked. It will be canceled.

In the second embodiment, as shown in FIGS. 7 and 8, the operating state is almost the same as that of the first embodiment. However, in the second embodiment, the braking state is changed from the released state of FIG. When the brake pedal 7 is rotated to the state shown in FIG. 8 by pressing the pressing portion 7a of the pedal 7, this rotation causes the shaft fulcrum b to move from the inner side to the outer side of the straight line L, so that the brake release pedal 6 moves. This is different from the first embodiment in that the brake pedal 7 stops at this position because the contact portion 6a comes into contact with the ground contact portion 7b of the brake pedal 7 as the pressing portion 6b moves up and the contact portion 6a rotates.

Also in the third embodiment, as shown in FIGS.
As shown in FIG. 2, the operation state is almost the same as that of the first embodiment, but in the third embodiment, the pressing portion 7a of the brake pedal 7 is pressed from the released state of FIG.
When the braking pedal 7 is rotated to the state shown in Fig. 5, this rotation moves the shaft fulcrum b from the inner side to the outer side of the straight line L, the braking release pedal 6 is rotated, and the pressing portion 6b is raised and the braking is performed. Since the contact portion 7c of the pedal 7 contacts the braking body 8, the braking pedal 7 stops at this position, which is a difference from the first embodiment.

[0025]

Since the caster braking mechanism of the present invention is constructed as described above, it has the following effects. First, the caster braking mechanism of the present invention is
Since the brake release pedal 6 and the brake pedal 7 are attached to the upper front part of the frame 2, the pedals can be operated from the same direction, which makes the operation very easy.

Further, when the caster braking mechanism of the present invention is applied to a caster of a shopping cart,
Since the brake release pedal 6 and the brake pedal 7 are attached to the upper front part of the frame 2, even if the casters come close to each other when the shopping carts are stacked and stored, those pedals do not come into contact with each other. , The braking mechanism no longer malfunctions.

[Brief description of drawings]

FIG. 1 is a side view of a caster having a braking mechanism according to a first embodiment of the present invention.

FIG. 2 is a plan view of a caster including a braking mechanism according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a state where the braking of the braking mechanism shown in the first embodiment of the present invention is released.

FIG. 4 is an explanatory view showing a braking state of the braking mechanism shown in the first embodiment of the present invention.

FIG. 5 is a side view of a caster having a braking mechanism according to a second embodiment of the present invention.

FIG. 6 is a plan view of a caster having a braking mechanism according to a second embodiment of the present invention.

FIG. 7 is an explanatory view showing a state in which the braking of the braking mechanism shown in the second embodiment of the present invention is released.

FIG. 8 is an explanatory view showing a braking state of the braking mechanism shown in the second embodiment of the present invention.

FIG. 9 is a side view of a caster having a braking mechanism according to a third embodiment of the present invention.

FIG. 10 is a plan view of a caster having a braking mechanism according to a third embodiment of the present invention.

FIG. 11 is an explanatory view showing a state where the braking of the braking mechanism shown in the third embodiment of the present invention is released.

FIG. 12 is an explanatory view showing a braking state of the braking mechanism shown in the third embodiment of the present invention.

FIG. 13 is a front view of a caster including a conventional braking mechanism.

FIG. 14 is an explanatory view showing an operating state of a conventional caster braking mechanism.

[Explanation of symbols]

 1 pedestal 2 frame 3 wheel 4 radial notch 5 engaging part 6 braking release pedal 6a abutting part 6b pressing part 7 braking pedal 7a pressing part 7b grounding part 7c abutting part 8 braking body 8a contacting part 8b engaging claw a Shaft fulcrum b Shaft fulcrum c Shaft fulcrum L Straight line

Claims (3)

[Claims] 1. A caster in which a wheel (3) is rotatably attached to a frame (2) pivotably attached below a pedestal (1), and a radial cut groove (4) is provided in a lower portion of the pedestal (1). The engaging portion (5) formed with the above is provided, the brake release pedal (6) and the brake pedal (7) are arranged on the front upper part of the frame (2), and the braking body (8) is arranged on the inner upper part of the frame (2). Is swingably attached, and the brake release pedal (6) is attached to the contact portion (6) with the frame (2).
a) is provided, one end is used as a pressing portion (6b), the brake release pedal (6) is pivotally supported on the frame (2), and one end of the brake pedal (7) is located below the pivot support point (a). Is pivotally supported, the braking pedal (7) is pivotally supported at one end of the braking body (8), and the other end of the braking pedal (7) is used as a pressing portion (7a). The braking release pedal (6) and the braking pedal (7) ) And the shaft fulcrum (b) are movable to both sides of a straight line (L) connecting the shaft fulcrum (a) and the shaft fulcrum (c) of the braking pedal (7) and the braking body (8), 8) is provided with a contact portion (8a) at one end thereof, the contact portion (8a) is arranged above the wheel (3), and an engaging claw (8b) is provided at the other end of the braking body (8). A braking mechanism for casters, characterized in that the engaging claws (8b) are arranged below the radial cut grooves (4). 2. A caster in which wheels (3) are rotatably mounted on a frame (2) pivotably mounted below a pedestal (1), and radial notch grooves (4) are formed on a lower portion of the pedestal (1). The engaging portion (5) formed with the above is provided, the brake release pedal (6) and the brake pedal (7) are arranged on the front upper part of the frame (2), and the braking body (8) is arranged on the inner upper part of the frame (2). The swing release pedal (6) is provided with an abutment portion (6a), one end of which is used as a pressing portion (6b), and the brake release pedal (6) is pivotally supported on the frame (2). , One end of the brake pedal (7) is supported below the shaft fulcrum (a), and the brake pedal (7) is in contact with the contact portion (6a) of the brake release pedal (6) and is in contact with the ground (7b). And the brake pedal (7) is pivotally supported on one end of the brake body (8) to control the brake pedal (7). The other end of the pedal (7) is used as a pressing portion (7a), and the shaft fulcrum (b) between the brake release pedal (6) and the brake pedal (7) is the shaft fulcrum (a), the brake pedal (7), and the brake body. (8) is movable to both sides of a straight line (L) connecting the shaft fulcrum (c) to (8), a contact portion (8a) is provided at one end of the braking body (8), and the contact portion (8a) is connected to the wheel (3). ), The braking body (8)
The caster braking mechanism is characterized in that an engaging claw (8b) is provided at the other end of the and the engaging claw (8b) is arranged below the radial cut groove (4). 3. A caster in which a wheel (3) is rotatably attached to a frame (2) pivotably attached below the pedestal (1), and a radial cut groove (4) is provided in a lower portion of the pedestal (1). The engaging portion (5) formed with the above is provided, the brake release pedal (6) and the brake pedal (7) are arranged on the front upper part of the frame (2), and the braking body (8) is arranged on the inner upper part of the frame (2). Is swingably attached, one end of the brake release pedal (6) is used as a pressing portion (6b), the brake release pedal (6) is pivotally supported on the frame (2), and a position lower than the shaft fulcrum (a) is provided. One end of the braking pedal (7) is pivotally supported, the braking pedal (7) is pivotally supported at one end of the braking body (8), and the other end of the braking pedal (7) is used as a pressing portion (7a). An abutment portion (7c) with the braking body (8) is provided in (7), and the brake release pedal (6 The axis fulcrum (b) of the brake pedal (7) and the brake pedal (7) can be moved to both sides of the straight line (L) connecting the axis fulcrum (a) and the axis fulcrum (c) of the brake pedal (7) and the brake body (8). And a contact portion (8a) is provided at one end of the braking body (8), and the contact portion (8a) is arranged above the wheel (3).
The caster braking mechanism is characterized in that an engaging claw (8b) is provided at the other end of the and the engaging claw (8b) is arranged below the radial cut groove (4).