JPH04331602A - Interlocking operation system for caster - Google Patents

Abstract

PURPOSE:To improve the operability of the lock of a caster by interlockingly operating a lock system via only a depressing action. CONSTITUTION:The first gear 3 is pivotally fitted to the rotary shaft of a cam member 12 for operating a lock system provided on a caster 2 of a bed and the like, the second gear 4 is engaged with the first gear 3, the first depressing operation lever 5 is fitted to the rotary shaft of the first gear 3, and the second depressing operation lever 6 is fitted to the second gear 4. The second depressing operation lever 6 is connected by a depressing lever 7 directed in the width direction of the bed. The lock and lock release of a wheel can be performed by only a depressing action, the operability is remarkably improved, and it can be sufficiently coped with in emergency.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlocking lock operation mechanism for casters, which is adapted to be used with a bed, etc., and in which the lock mechanism is operated by simply stepping on the caster.

0002

2. Description of the Related Art For example, many casters for movement attached to the legs of a bed or the like are equipped with a locking mechanism. That is, this locking mechanism has a brake piece that comes into contact with the wheel to lock the wheel, an actuating rod that presses the brake piece, and a cam member that presses and operates the actuating rod. The rotating shaft of the pedal is directly connected to the moving shaft.

0003

[Problems to be Solved by the Invention] According to this type of pedal, when the actuating rod is actuated to lock the wheels, it is done by depressing the foot pedal, but when the lock is released, the wheel is locked by pressing the foot pedal. Either the pedal must be lifted in the opposite direction, or a separate pedal must be provided to release the lock. In this case, when locking the wheels, the treadle-type pedal is strongly stepped on, so a large amount of force is required to lift the treadle-type pedal in the opposite direction, making it difficult to operate. Additionally, if a lock release pedal is provided, the lock release pedal is normally provided on the opposite side of the position where the lock operation pedal is provided, that is, on the inside of the bottom of the bed. Therefore, you have to move each time you want to unlock it. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an interlocking lock operation mechanism for casters that allows wheels to be locked and unlocked by simply stepping on the wheel.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a system in which a first gear is mounted on a rotating shaft of a cam member for operating a locking mechanism provided on casters of a bed, etc. At the same time, a first tread operation lever is attached, an interlocking mechanism for interlocking the locking mechanism of another caster is attached to the first gear, a second gear is meshed with the first gear, and the second gear is engaged with the first gear. A second pedal operation lever is attached to the rotating shaft of the two gears, and the second pedal operation levers are connected to each other. Further, the caster is applied to a bed or the like, and the first pedal operation lever and the second pedal operation lever are provided so as to face downward and outward from the main body of the bed or the like.

[0005]

[Operation] When locking the casters on a bed or the like, depress the second pedal operation lever. Then,
The second gear rotates, and the first gear rotates in the opposite direction to the second gear to actuate the locking mechanism via the cam member to lock the wheel. At this time, the first pedal operation lever is displaced upward. On the other hand, when unlocking, the locking mechanism is unlocked by depressing the first pedal operation lever, and the second pedal operation lever is interlockedly displaced upward. The first step-in operation rod and the second step-in operation rod are provided toward the lower outer side of the main body of the bed or the like, and the operation positions are close to each other, so that they can be easily operated.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a caster interlocking lock operation mechanism according to the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 indicates a caster interlock lock operation mechanism applied to a bed, etc., and this interlock lock operation mechanism 1 is used to lock a lock mechanism (described later) provided on casters 2 of the bed etc. belongs to. That is, the interlocking lock operation mechanism 1
A first gear 3 is rotatably mounted on a rotating shaft (described later) of a cam member (described later) for operating a locking mechanism provided on casters 2 of a bed, etc., and a second gear 3 is attached to the first gear 3. gears 4 are meshed together, and a first pedal operation lever 5 is attached to the rotating shaft of the first gear 3, while a second pedal operation lever 6 is attached to the second gear 4, and this second pedal operation lever 5 is attached to the rotation shaft of the first gear 3. The operating rod 6 is a caster 2 facing in the width direction of the bed.
It is equipped with a treadle 7 that connects the two to each other. It should be noted that the first pedal operation lever 5 and the second pedal operation lever 6 are provided so as to face downward and outward from the main body of the bed or the like. Here, to explain the locking mechanism provided on the caster 2, the locking mechanism 8 is as shown in FIG.
A brake piece 10 that contacts the wheel 9 that constitutes the caster 2;
It includes an actuating rod 11 for pressing the brake piece 10 against the wheel 9, and a cam member 12 for pressing the actuating rod 11 against spring force. As shown in FIG. 3, the cam member 12 has a shaft member 15 of a transmission rod 14 forming an interlocking link 13 passing through the first gear 3 on a surface facing in the width direction of the bed. It has a configuration in which the first pedal operation lever 5 is pivoted on the outside. The interlocking link 13 is an interlocking rod 1 that connects the casters 2 located in the longitudinal direction of the bed so as to be interlockable via a transmission rod 14.
6.

Interlocking interlocking lock operation mechanism 1 according to the present invention
is constructed as described above, and its operation will be explained next. When locking the casters 2 on a bed or the like, as shown in FIG.
Step into it. Then, the second gear 4 rotates, and the first gear 3 rotates in the opposite direction to the second gear 4, operating the locking mechanism 8 via the cam member 12 to lock the wheel 9. As the first gear 3 rotates, the locking mechanism 8 of the caster 2 located in the longitudinal direction of the bed also rotates via the interlocking link 13.
locked. At this time, the first pedal operation lever 5 is displaced upward (see FIG. 5). On the other hand, when unlocking, as shown in FIG. 6, the locking mechanism 8 is unlocked by depressing the first pedal operation lever 5. Furthermore, as the first gear 3 rotates, the lock mechanism 8 of the other caster 2 located in the longitudinal direction of the bed is also unlocked via the interlocking link 13, and the second pedal operation lever 6 is interlockedly displaced upward ( (See Figure 7). In this way, the locking mechanism 8 of the caster 2 is locked or unlocked by depressing the second operating lever 6 in the case of locking operation, and by stepping on the first operating lever 6 in case of unlocking. This can be achieved by depressing the depressing operation lever 5. Moreover, the first tread operation lever 5 and the second
The pedal operation lever 6 is oriented toward the bottom and outside of the main body of the bed, etc.
Since they are located close to each other, it does not take much effort to change the pedals, greatly improving operability.

[0008]

[Effects of the Invention] As described above, according to the present invention, the wheels can be locked and unlocked by simply pressing the pedal, so the operability is greatly improved and it is possible to fully respond to emergency situations. There are big advantages.

[0009]

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory view showing one embodiment of a caster interlocking lock operation mechanism according to the present invention.

FIG. 2 is an explanatory cross-sectional view showing an example of the locking mechanism of the caster shown in FIG. 1;

FIG. 3 is a perspective explanatory view of essential parts of the interlocking lock operation mechanism shown in FIG. 1;

FIG. 4 is a diagram illustrating a locking operation of the caster interlocking locking mechanism according to the present invention.

FIG. 5 is a diagram illustrating the positions of a first pedal operation lever and a second pedal operation lever during the operation shown in FIG. 4;

FIG. 6 is a diagram illustrating a lock release operation of the caster interlocking lock operation mechanism according to the present invention.

7 is a diagram illustrating the positions of the first pedal operation lever and the second pedal operation lever during the operation shown in FIG. 6. FIG.

[Explanation of symbols]

1
Interlocking lock operation mechanism 2
Caster 3
1st gear 4

2nd gear 5
1st pedal operation lever 6
2nd pedal operation lever

Claims (2)

[Claims] 1. A caster equipped with a locking mechanism interlocked by rotation of a cam member, in which a first gear is pivotally attached to the rotation shaft of the cam member and a first pedal operation lever is attached, while the first gear is attached to the rotation shaft of the cam member. An interlocking mechanism for interlocking the locking mechanism of the other caster is attached to the first gear, a second gear is meshed with the first gear, and a second pedal operation rod is attached to the rotation shaft of the second gear. Also, a caster interlocking lock operation mechanism characterized in that the second pedal operation levers are connected to each other. [Claim 2] The caster according to claim 1 is applied to a bed, etc., and the first pedal operation lever and the second pedal operation lever are provided so as to face downward and outward from the main body of the bed, etc. A caster interlocking lock operation mechanism featuring: