JP2001191709A - Lock device of caster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock device of a caster capable of braking a wheel and locking a frame when fixing a carriage and capable of regularizing the direction of the wheel while rotating the wheel. SOLUTION: This caster 10 composed of a fixed baseplate 12 fixed to an installing shaft 11 and a frame 21 being rotatably installed on the installing shaft 11 and journaling a wheel 23, is provided with a locking recessed part 14 arranged in the fixed baseplate 12, a braking plate 34 installed on the frame 21, a braking pedal 31 for bringing the braking plate 34 into pressure contact with the wheel at stepping-down time, a lock plate 42 having a locking projection 43 locked on the locking recessed part 14 and a lock pedal 41 for locking the locking projection 43 on the locking recessed part 14 at stepping-down time, and the frame 21 is locked on the fixed baseplate 12 when stepping down the lock pedal 41, and the frame 21 is locked on the fixed baseplate 12 and the wheel 23 is also braked when stepping down the lock pedal 41 and the braking pedal 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for a caster mounted on a bogie or the like, and more particularly to a lock device for a caster capable of braking the rotation of a wheel and locking the direction of the wheel.

[0002]

2. Description of the Related Art As a caster mounted on a truck or the like, there is known a caster in which a fixed base plate is mounted on a mounting shaft, and a frame supporting wheels is rotatably mounted on the fixed base plate. When the brake lever is depressed, the brake plate is pressed against the wheels to fix the bogie.

[0003] Further, there is also known an apparatus in which a locking recess is provided in a fixed base plate when the bogie is fixed to lock the rotation of the fixed base plate at the same time as braking the wheels.

[0004]

As described above, the structure in which the frame is rotatable is extremely effective for turning the direction when transporting a bogie, but is effective when the road is inclined. There is a problem that the traveling direction of the bogie fluctuates.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to fix a bogie to brake a wheel and lock a frame, and to rotate a wheel. It is an object of the present invention to provide a lock device for a caster that can keep the direction of wheels constant.

[0006]

According to the first aspect of the present invention, a description will be given with reference numerals used in the embodiments.
1 and a frame 21 that is rotatably attached to the mounting shaft 11 and rotatably supports the wheels 23, a locking recess 14 provided on the fixed base plate 12. A brake plate 34 attached to the frame 21, a brake pedal 31 rotatably mounted on the frame 21 and pressing the brake plate 34 against wheels when depressed, and a pivotable plate on the frame 21. And a locking plate 42 having a locking projection 43 at its tip for locking to the locking concave portion 14. The locking plate 42 is rotatably mounted on the frame 21 and is rotated when depressed. A lock pedal 41 for locking the locking projection 43 to the locking recess 14, and locking the frame 21 with respect to the fixed base plate 12 when the lock pedal 41 is depressed; Having features the frame 21 when depressed the Kupedaru 41 and brake pedal 31 was adapted to brake the wheels 23 while locked to the fixed base plate 12.

According to a second aspect of the present invention, the lock pedal 41
The brake pedal 31 is provided so as to surround the brake pedal 31.
It is characterized in that it is rotatably provided on the same axis as the.

According to a third aspect of the present invention, when the brake pedal 31 is depressed in conjunction with one of the lock pedal 41 and the brake pedal 31, the brake pedal 31 is depressed when the lock pedal 41 is restored. It is characterized in that an interlocking part 45 that returns at the same time is provided.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a caster lock device according to an embodiment of the present invention.

First, in FIGS. 1 and 2, a fixed base plate 12 is integrally fixed to a lower end of a mounting shaft 11 of a caster 10, and a frame 21 is rotatably mounted through a thrust bearing 13. I have. The frame 21 has a U-shape, and a wheel 23 is rotatably supported by a shaft portion 22 at a lower end.

A locking plate 15 having a number of locking recesses 14 formed on the outer peripheral portion between the fixed base plate 12 and the thrust bearing 13.
Are fixed integrally.

One end of the brake pedal 31 is rotatably connected to the center of a shaft 32 provided on the frame 21.
A shaft 33 is provided on the frame 21 in parallel with the shaft 32. As shown in FIG. 4, a braking plate 34 made of an elastic material is supported on the shaft 33. The brake pedal 31 is integrally formed with a brake cam 35 at a position corresponding to the brake plate 34. When the brake pedal 31 is depressed, the brake cam 35 contacts the brake plate 34 and
Is pressed against the wheel 23.

The lock pedal 41 is disposed around the brake pedal 31 so as to surround it, and is rotatably mounted on the shaft 32 of the frame 21 at both sides thereof.

The lock plate 42 has a central portion located on both sides of the brake plate 34 and is rotatably mounted on the shaft 33. A plurality of, for example, three locking projections 43 at the tip end are engaged with the locking plate 15. Stop recess 1
Lock to 4. A lock plate 42 is provided on the lock pedal 41.
The cam 44 corresponding to the lock pedal 4 is formed.
When 1 is depressed, the locking plate 42 is rotated in the direction of arrow A.

The lock pedal 41 is provided with an interlocking part 45 projecting below the brake pedal 31.

Although not shown, a stopper is formed between the lock pedal 41 and the frame 21 when the lock pedal 41 is depressed.

In this embodiment, as shown in FIG. 3, the lock pedal 41 and the brake pedal 31 are returned in the used state, and the locking projection 43 is pulled out of the locking recess 14 of the locking plate 15. In the detached state, the brake plate 34
3 away.

When the lock pedal 41 is depressed, as shown in FIG. 1, the cam 44 rotates, the lock plate 42 rotates in the direction of arrow A, and the locking projection 43 engages with the locking recess 14 of the locking plate 15.
To lock. Thereby, the frame 21 is fixed to the fixed base plate 12.
Locked to. However, since the brake plate 34 is separated from the wheel 23, the wheel 23 rotates in a certain direction.

When releasing the lock, the lock pedal 4
If 1 is lifted upward, the cam 44 returns, the locking projection 43 is pulled out of the locking recess 14, and the frame 21 rotates freely.

Next, when the brake pedal 31 is depressed, as shown in FIG. 4, the brake cam 35 comes into contact with the brake plate 34 and presses the brake plate 34 against the wheel 23 to brake the wheel. Also,
Since the lock pedal 41 is also depressed via the interlocking portion 45 together with the brake pedal 31, the frame 21 is also fixed to the fixed base plate 1.
Locked to 2. Note that the interlocking portion 45 is not always necessary, and the lock pedal 41 is arranged so as to surround the brake pedal 31, so that when the brake pedal 31 is depressed, the lock pedal 41 can be depressed at the same time.

If the lock pedal 41 is lifted upward,
The brake pedal 31 is also returned via the interlocking unit 45, and returns to the original state.

According to the above embodiment, the following effects can be obtained. (1) Since the lock pedal 41 can be operated independently of the brake pedal 31, the wheels can be fixed and rotated in a fixed direction, and the direction can be easily stabilized when traveling on a slope or the like. It is. (2) Since the lock pedal 41 is arranged around the brake pedal 31 so as to be rotatable coaxially, both pedals can be depressed simultaneously, and the caster 10 can be easily locked. (3) Interlocking part 4 between lock pedal 41 and brake pedal 31
5, the two pedals can return at the same time.

[0023]

According to a first aspect of the present invention, there is provided a caster comprising a fixed base plate fixed to a mounting shaft and a frame rotatably mounted on the mounting shaft and supporting wheels. A locking recess provided, a brake plate attached to the frame, a brake pedal that is rotatably mounted on the frame and presses the brake plate against a wheel when stepped on, and is rotatable with the frame. A locking plate having a locking projection at the tip portion that locks into the locking recess, and a locking plate that is rotatably mounted on the frame and turns the locking plate when stepped on to lock the locking projection. A lock pedal that locks in the locking recess, wherein the frame is locked to the fixed base plate when the lock pedal is depressed, and the frame is fixed when the lock pedal and the brake pedal are depressed. Since the wheels are locked against the base plate and the wheels are braked, there is an effect that it is possible to easily switch between locking the casters and fixing and rotating the wheels in a fixed direction when traveling on a slope or the like. It is.

According to the second aspect of the present invention, since the lock pedal is provided so as to surround the brake pedal and is rotatably provided on the same axis as the brake pedal, both pedals can be depressed simultaneously, and the caster can be locked. This has the effect of being simple.

According to a third aspect of the present invention, there is provided an interlocking unit which, when depressing the brake pedal, depresses the lock pedal in conjunction with one of the lock pedal and the brake pedal, and simultaneously returns the brake pedal when the lock pedal is returned. With the provision, the effect that both pedals can be returned at the same time is exerted.

[Brief description of the drawings]

FIG. 1 is a front view of a caster locking device according to an embodiment of the present invention, taken along line II in FIG. 2 with a lock pedal depressed.

FIG. 2 is a plan view.

FIG. 3 is a front view in a use state.

FIG. 4 is a front view taken along the line IV-IV in a state where a lock pedal and a brake pedal are depressed in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Caster 11 Mounting shaft 12 Fixed base plate 14 Locking recess 15 Locking plate 21 Frame 23 Wheel 31 Brake pedal 34 Brake plate 41 Lock pedal 42 Lock plate 43 Locking projection 45 Interlocking part

Claims (3)

[Claims] 1. A caster comprising: a fixed base plate fixed to a mounting shaft; and a frame rotatably mounted on the mounting shaft and supporting a wheel, wherein: a locking recess provided in the fixed base plate; A brake plate attached to the frame, a brake pedal that is rotatably mounted on the frame and presses the brake plate against a wheel when depressed, A lock plate having a locking projection for locking to the locking recess; and a lock plate rotatably mounted on the frame to rotate the lock plate when stepped on to lock the locking projection to the locking recess. A lock pedal, wherein the frame is locked to the fixed base plate when the lock pedal is depressed, and the frame is fixed to the fixed base plate when the lock pedal and the brake pedal are depressed. Caster locking device being characterized in that so as to brake the wheel as well as click. 2. The caster lock device according to claim 1, wherein the lock pedal is provided so as to surround the brake pedal and is rotatably provided on the same axis as the brake pedal. 3. The vehicle according to claim 1, wherein the lock pedal is provided with an interlocking part which is depressed in conjunction with the depression of the brake pedal, and which simultaneously returns the brake pedal when the lock pedal is returned. The caster locking device according to claim 1 or 2, wherein