KR20190002775U - Locking apparatus for caster - Google Patents

Abstract

The present invention relates to a caster lock. One aspect of the caster locking device according to an embodiment of the present invention, the hollow is provided on the bottom surface of the product so as to be rotatable about the axis in the vertical direction, the caster is installed on the one side so as to enable rolling movement around the axis in the horizontal direction Housing; A support rod installed to be linearly movable in a vertical direction with respect to the housing, the lower end of which being selectively positioned at a lifting position spaced apart from the ground, and a lower end thereof being supported on the ground; A drive mechanism for driving linear movement of the support rod relative to the housing; And a locking mechanism for limiting linear movement of the support rod with respect to the housing positioned in the lifting position or the lowering position. The caster and the support rod are supported on the ground alternately with each other.

Description

Caster Lock {LOCKING APPARATUS FOR CASTER}

The present invention relates to a caster lock.

Casters enable the movement of products by rolling motion and are used in furniture, medical equipment and the like. Such a caster is generally installed to be rotatable about the axis in the vertical direction for the change of direction while rolling motion about the axis in the horizontal direction for movement. Therefore, in order to stop or fix the product in a predetermined position, not only the rolling motion of the caster but also its rotational motion must be limited, so that the configuration of the device for this is complicated.

Republic of Korea Patent No. 1003903 (Name: Directional caster with brake function) Republic of Korea Patent No. 1357875 (Name: Rotation type caster rotary locking device of the invention)

The present invention is to solve the problems caused by the prior art as described above, an object of the present invention is to provide a caster locking device configured to limit the rolling motion and rotational movement of the caster in a simpler configuration.

One aspect of the caster locking device according to an embodiment of the present invention for achieving the above object is installed on the bottom of the product so as to be rotatable about the axis in the vertical direction, the caster on one side of the axis in the horizontal direction A hollow housing installed to enable rolling motion; A support rod installed to be linearly movable in a vertical direction with respect to the housing, the lower end of which being selectively positioned at a lifting position spaced apart from the ground, and a lower end thereof being supported on the ground; A drive mechanism for driving linear movement of the support rod relative to the housing; And a locking mechanism for limiting linear movement of the support rod with respect to the housing positioned in the lifting position or the lowering position. The caster and the support rod are supported on the ground alternately with each other.

In one aspect of an embodiment of the present invention, the drive mechanism, the main link link pin is connected to the support rod by a main pin; And a driven link member pinned to the housing and the main link member by a driven pin and a connecting pin, respectively. And, when the driving mechanism is driven, the main link member and the driven link member rotate about the main pin and the driven pin, respectively, so that the drive mechanism connects a release position, a reference position, and a lock position. The support rod moves upwardly or downwardly with respect to the housing while moving toward, and moves linearly between the lowered position and the lowered position.

In one aspect of an embodiment of the present invention, the main link member and the driven link member, each of the first and second ends, one side of the main link link member spaced apart from the first and second ends of the main link link member Is pinned to the support rod by the driving pin, and the first end of the driven link member is pinned to the housing by the driven pin, and the second end of the driving link member and the driven link member. The second end of the pin is connected by the connecting pin.

In one aspect of an embodiment of the present invention, the pivot link member comprises: a first link arm defining a first end of the pivot link member; And a second link arm defining a second end of the main link member; And the first and second link arms are inclinedly connected to a predetermined angle, and the connection portions of the first and second link arms are pinned to the support rod by the main pin, and the driving mechanism When positioned at the reference position, the first link arm and the driven link member are located on the same imaginary straight line, and when the drive mechanism is positioned at the released or locked position, the first link arm and the driven link member are It is located on a virtual straight line inclined at a predetermined angle.

In one aspect of an embodiment of the present invention, the drive mechanism further includes a pedal fixed to the coarse link member and receiving an external force for driving the drive mechanism.

In one aspect of an embodiment of the present invention, the locking mechanism restricts movement of the drive mechanism from the release position or the lock position toward the lock position or the release position.

In one aspect of an embodiment of the present invention, the locking mechanism is provided on the connecting pin so that both ends thereof are fixed to the main link member and the driven link member, respectively, and the driving mechanism is positioned at the release position or the lock position. And a torsion spring for imparting an elastic force to the drive mechanism in a direction from the lock position toward the release position or from the release position toward the lock position.

In one aspect of an embodiment of the present invention, the locking mechanism restricts movement of the driving mechanism in a direction from the release position toward the locking position with the driving mechanism positioned at the locking position.

In an aspect of an embodiment of the present invention, the locking mechanism is provided on one side of the housing, and when the driving mechanism moves from the release position to the locking position, at least one of the main link member and the driven link member is supported. It is a stopper.

In the caster locking device according to the embodiment of the present invention, the caster and the support rod are alternately supported on the ground depending on whether or not the support rod linearly moving with respect to the housing is supported on the ground by the drive mechanism. In particular, in the embodiment of the present invention, the driving mechanism for moving the support rod relative to the housing is limited by the locking mechanism while the support rod is spaced from or supported by the ground. Therefore, according to the embodiment of the present invention, the rolling motion of the caster can be selectively allowed with a simpler configuration.

1 is a perspective view showing a caster lock according to an embodiment of the present invention.
Figure 2 is a longitudinal sectional view showing an embodiment of the present invention.
Figure 3 is an operating state showing the release / locking process of the caster by the caster locking device according to an embodiment of the present invention.

Hereinafter will be described in more detail with reference to the accompanying drawings the configuration of the caster locking device according to an embodiment of the present invention.

1 is a perspective view showing a caster locking device according to an embodiment of the present invention, Figure 2 is a longitudinal sectional view showing an embodiment of the present invention.

1 and 2, the caster locking device 1 according to the present embodiment is to selectively allow / restrict rolling motion of the caster 10, and includes a housing 100, a support rod 200, Drive mechanism 300 and locking mechanism. Substantially, in this embodiment, the caster 20 and the support rod 200 are supported on the ground alternately with each other, so that the rolling motion of the caster 20, that is, the product 10 on which the caster 20 is installed Movement is optionally allowed / restricted.

In more detail, the housing 100 is installed on the bottom of the product 10 so as to be rotatable about an axis in a vertical direction. The housing 100 may be formed in a hollow cylindrical shape having a predetermined length in the vertical direction. In addition, the guide boss 11 provided on the bottom surface of the product 10 is inserted into the upper end of the housing 100, so that the housing 100 rotates about an axis in a vertical direction, that is, the guide boss 11. can do.

And one side of the housing 100 is provided with a caster bracket (110). The caster bracket 110 protrudes radially from one side of an outer surface of the housing 100, and the caster bracket 110 is installed in the caster bracket 110 so as to enable rolling movement about an axis in a horizontal direction.

The support rod 200 is installed to be linearly movable in the vertical direction with respect to the housing 100. Substantially, the support rod 200 has a lifting position U (see FIG. 3A) with its lower end spaced from the ground, and a lowering position D with its lower end supported on the ground (FIG. 3C). Is optionally located). When the support rod 200 is positioned at the lifting position U, the caster 20 is supported on the ground, and when the support rod 200 is positioned at the lowering position D, the caster 20 ) Is spaced from the ground. To this end, the support rod 200, for example, the outer diameter may be formed in a hollow cylindrical shape having a value equal to or less than the inner diameter of the housing 100.

In this embodiment, the support flange 210 is provided on the bottom of the support rod 200. The support flange 210 extends radially from the bottom of the support rod 200, and substantially, the bottom of the support flange 210 will be supported on the ground.

On the other hand, the drive mechanism 300 drives for linear movement of the support rod 200 with respect to the housing 100. Substantially, the driving mechanism 300 provides a driving force for linear movement of the support rod 200 relative to the housing 100 by link movement by an external force applied by the user. In this embodiment, the drive mechanism 300 includes a main link member 310 and a driven link member 320.

The main link member 310 is pin-connected to the support rod 200 by a main driving pin 331, and the driven link member 320 is driven to the housing 100 and the main link member 310. The pins 332 and the connecting pins 333 are connected to each other. In the present embodiment, when the drive mechanism 300 is driven, the driving link member 310 and the driven link member 320 is rotated about the driving pin 331 and the driven pin 332, respectively, to drive the drive. The instrument 300 has a release position P1 (see FIG. 3A), a reference position P2 (see FIG. 3B) and a lock position P3 (see FIG. 3C). The support rod 200 moves upwardly or downwardly with respect to the housing 100 while moving in a predetermined trajectory for connecting, and linearly moves between the lifting position U and the lowering position D.

More specifically, the main link member 310 and the driven link member 320 includes first and second ends, respectively. For example, the main link member 310 and the driven link member 320 may be formed in a bar shape having a predetermined length, respectively. Substantially, one side of the driving link member 310 spaced apart from the first and second ends of the driving link member 310 is pinned to the support rod 200 by the driving pin 331. The first end of the driven link member 320 is pin-connected to the housing 100 by the driven pin 332, and the second end of the main link member 310 and the driven link member 320. The second end of the pin is connected to the pin by the connecting pin 333.

Meanwhile, the main link member 310 may include first and second link arms 311 and 312. The first and second link arms 311 and 312 define first and second ends of the main link member 310, respectively, and are also connected to a predetermined angle inclinedly. Connection portions of the first and second link arms 311 and 312 are pinned to the support rod 200 by the main pin 331. In the present embodiment, when the drive mechanism 300 is located at the reference position P2, the first link arm 311 and the driven link member 320 are located on the same imaginary straight line. When the driving mechanism 300 is located at the release position P1 or the lock position P3, the first link arm 311 and the driven link member 320 are inclined at a predetermined angle in a virtual straight line. Is located in.

In addition, the drive mechanism 300 may further include a pedal 340. The pedal 340 is fixed to the coarse link member 310 and the first end of the coarse link member 310, for example, by the user stepping on or lifting the drive mechanism ( Receives an external force for driving 300).

On the other hand, the locking mechanism restricts linear movement of the support rod 200 with respect to the housing 100 located at the lifting position U or the lowering position D. FIG. Substantially, the locking mechanism restricts the movement of the drive mechanism 300 in a state where the support rod 200 is located at the lifting position U or the lowering position D. FIG.

In this embodiment, the locking mechanism restricts the movement of the drive mechanism 300 from the release position P1 or the lock position P3 toward the lock position P3 or the release position P1. For example, a torsion spring may be used as the locking mechanism. The torsion spring 410 is mounted on the connecting pin 333 such that both ends thereof are fixed to the main link member 310, the second link arm 312 and the driven link member 320, respectively. . The torsion springs 410 may be arranged in opposite directions depending on the angles of the main link member 310 and the driven link member 320, that is, the angles of the second link arm 312 and the driven link member 320. An elastic force is applied to the drive mechanism 300. In other words, when the driving mechanism 300 is positioned at the release position P1, the torsion spring 410 may apply an elastic force in a direction from the locking position P3 toward the release position P1. To 300). When the driving mechanism 300 is located at the locking position P3, an elastic force in a direction from the release position P1 toward the locking position P3 is applied to the driving mechanism 300.

In addition, the locking mechanism of the driving mechanism 300 in the direction from the release position P1 toward the locking position P3 in a state where the driving mechanism 300 is located at the locking position P3. You can restrict movement. For example, the stopper 420 may be used as the locking mechanism. The stopper 420 is provided at one side of the housing 100, and when the driving mechanism 300 moves from the release position P1 to the lock position P3, the main link member 310 and At least one of the driven link members 320, for example, one side of the main link member 310 is supported.

Hereinafter will be described in more detail with reference to the accompanying drawings, the operation of the caster locking device according to an embodiment of the present invention.

3 is an operation state diagram showing the release / locking process of the caster by the caster locking device according to an embodiment of the present invention.

Referring to FIG. 3A, the caster 20 is supported on the ground in a state where the support rod 200 is located at the lift position U. As shown in FIG. Therefore, the product 10 can be moved by the rolling motion of the caster 20. In addition, when the support rod 200 is located at the lifting position U, the driving mechanism 300 is located at the release position P1.

On the other hand, in the state in which the drive mechanism 300 is located in the release position P1, the elastic force in the direction from which the drive mechanism 300 faces the release position P1 at the lock position P3 is applied to the torsion spring ( 410 is imparted to the drive mechanism 300. Therefore, despite the weight of the support rod 200 and the support bracket 210, the support rod 200 is maintained in the lifting position U by the elastic force of the torsion spring 410. .

Next, referring to FIGS. 3B and 3C, in the state where the support rod 200 is located at the lifting position U, the driving mechanism is operated by the user stepping on the pedal 340. When the external force is applied to the 300, the drive mechanism 300 is driven to move to the locus connecting the release position (P1), the reference position (P2) and the locking position (P3). When the driving mechanism 300 is positioned at the locking position P3 via the reference position P2 at the release position P1, the support rod 200 linearly moves downward with respect to the housing 100. In the lowered position (D). Therefore, the support rod 200, substantially the support bracket 210 is supported on the ground, and the caster 20 is spaced apart from the ground, thereby limiting the movement of the product 10 in the horizontal direction.

On the other hand, when the drive mechanism 300 moves from the release position P1 to the lock position P3 via the reference position P2, the torsion spring 410 is moved at the release position P1. An elastic force in the direction toward the locking position P3 is applied to the drive mechanism 300. In addition, one side of the drive mechanism 300 moving from the release position P1 to the lock position P3, and substantially one side of the first link arm 311 is supported by the stopper 420. Therefore, even when the weight of the product 10 is applied in the state in which the support bracket 210 is supported on the ground, the support rod 200 is in the lowered position D with respect to the housing 100. The state positioned in the said lowering position D is maintained, without moving to the raising / lowering position U. FIG.

Within the scope of the basic technical idea of the present invention, many other modifications are possible to those skilled in the art, and the scope of the present invention is interpreted based on the attached utility model registration claims. Should be.

10: Product 20: Caster
100: housing 200: support rod
300: drive mechanism 310: main link member
320: driven link member 410: torsion spring
420: stopper

Claims (9)

A hollow housing 100 installed on the bottom of the product 10 so as to be rotatable about an axis in a vertical direction, and on one side of which the caster 20 is rotatably installed about an axis in a horizontal direction;
The support rod is installed to be linearly movable in the vertical direction with respect to the housing 100, and the support rod is selectively positioned at an elevated position U whose lower end is spaced from the ground, and a lowered position D whose lower end is supported on the ground ( 200);
A driving mechanism 300 for driving the linear movement of the support rod 200 with respect to the housing 100; And
A locking mechanism for restricting linear movement of the support rod 200 with respect to the housing 100 located at the lifting position U or the lowering position D; Including,
The caster 20 and the support rod 200 is caster locking device is supported on the ground alternately with each other.
The method of claim 1,
The drive mechanism 300,
A driving link member 310 which is pin-connected to the support rod 200 by a driving pin 331; And
A driven link member 320 pin-connected to the housing 100 and the main link member 310 by a driven pin 332 and a connecting pin 333, respectively; Including,
When the driving mechanism 300 is driven, the driving link member 310 and the driven link member 320 rotate about the driving pin 331 and the driven pin 332, respectively, so that the driving mechanism 300 is driven. The support rod 200 moves upward or downward with respect to the housing 100 while moving to a predetermined trajectory that connects the release position P1, the reference position P2, and the lock position P3 to the lifting position ( Caster lock that moves linearly from U) to the lowered position (D).
The method of claim 2,
The main link member 310 and the driven link member 320 includes a first and a second end, respectively,
One side of the driving link member 310 spaced apart from the first and second ends of the driving link member 310 is pin-connected to the support rod 200 by the driving pin 331,
The first end of the driven link member 320 is pin-connected to the housing 100 by the driven pin 332,
The second end of the main link member 310 and the second end of the driven link member 320, the caster locking device is pin-connected by the connecting pin (333).
The method of claim 3, wherein
The main link member 310,
A first link arm 311 defining a first end of the primary link member 310; And
A second link arm 312 defining a second end of the primary link member 310; Including,
The first and second link arms 311 and 312 are inclinedly connected to a predetermined angle,
Connection portions of the first and second link arms 311 and 312 are pinned to the support rod 200 by the main pin 331,
When the drive mechanism 300 is located at the reference position P2, the first link arm 311 and the driven link member 320 are positioned on the same imaginary straight line, and the drive mechanism 300 is positioned on the same. When positioned in the release position (P1) or lock position (P3), the first link arm (311) and the driven link member 320 is positioned on a virtual straight line inclined at a predetermined angle.
The method of claim 2,
The drive mechanism (300), the caster lock device further comprises a pedal (340) is fixed to the main link member 310, the external force is transmitted for driving the drive mechanism (300).
The method of claim 2,
The locking mechanism,
Caster locking device for restricting the movement of the drive mechanism (300) from the release position (P1) or lock position (P3) toward the lock position (P3) or release position (P1).
The method of claim 6,
The locking mechanism,
Both ends thereof are installed on the connecting pin 333 so as to be fixed to the main link member 310 and the driven link member 320, respectively, and the driving mechanism 300 is the release position P1 or the lock position P3. ), The torsion to give the drive mechanism 300 an elastic force in the direction from the locking position (P3) toward the release position (P1) or from the release position (P1) toward the locking position (P3) Caster lock with spring (410).
The method of claim 2,
The locking mechanism,
Caster lock device for limiting the movement of the drive mechanism 300 in the direction from the release position (P1) toward the lock position (P3) in the state that the drive mechanism 300 is located in the lock position (P3) .
The method of claim 8,
The locking mechanism,
Is provided on one side of the housing 100, when the drive mechanism 300 moves from the release position (P1) to the locking position (P3), of the main link member 310 and the driven link member 320 The caster lock device which is a stopper 420 at least one of which is supported.

Images