KR20100022886A

KR20100022886A - Automatic device for fixing a wheel

Info

Publication number: KR20100022886A
Application number: KR1020080081608A
Authority: KR
Inventors: 김정곤
Original assignee: 김정곤
Priority date: 2008-08-20
Filing date: 2008-08-20
Publication date: 2010-03-03

Abstract

PURPOSE: An automatic fixing device for the rotation of a wheel is provided to easily fix the rotation of a wheel. CONSTITUTION: An automatic fixing device(70) for the rotation of a wheel comprises a wheel support body(20), a moving unit(40), and an elastic body(50). The wheel support body is connected to a rotary shaft(12) of a wheel(10). The moving unit covers the wheel support body and is moved up and down to the wheel support body and the wheel. The elastic body is inserted between the top end of the moving unit and the wheel support body. The elastic body rotates the moving unit when a load(68) applied to a leg(60) is removed.

Description

AUTOMATIC DEVICE FOR FIXING A WHEEL}

The present invention relates to a rotating wheel, and more particularly, to a wheel rotation fixing device that can be rotated even if the wheel is automatically fixed when a load is given, if necessary.

In general, a transport device such as a mobile ladder workbench is provided with wheels that can rotate left and right at the bottom. The conveying device provided with such a rotating wheel can freely rotate the wheel from side to side, so that the user can easily move the conveying device in a desired direction.

Referring to FIG. 5, which shows a conventional rotating wheel for clarity, the rotating wheel 90 is generally connected to the rotating shaft 91 around the wheel 93 as if the wheel support 92 surrounds the wheel 93. To support the wheels 93. A leg 94 is connected to an upper end of the wheel support 92 through a ball bearing, a thrust bearing, and the like so that the wheel support 92 can rotate left and right. In particular, the leg 94 is mainly connected to one side of the top of the wheel support 92, not the center of the top of the wheel support 92. This is because when the user applies a force in a direction to move to the conveying device, the rotary wheel 90 is automatically parallel to the moving direction is easy to move.

Conventional rotary wheel 90 can be attached to the lower end of the conveying device as described above to facilitate the movement of the conveying device, but practically has some problems. Rotating wheel 90 is configured to rotate left and right, and also the wheel 93 itself is configured to always rotate. Therefore, when the user is standing on a transport device such as a moving ladder workbench for work, the rotary wheel 90 is configured to always roll, there is a problem that slip easily. In particular, when the floor is inclined, or when the worker who climbs on the conveying device exerts a lateral load on the conveying device by applying a force to the side wall for drilling, etc., the conveying device is more easily slipped and there is a danger of falling of the user. Very high. In addition, due to the anxiety about the slip does not work efficiently.

In order to overcome such a problem, a fixed rotating wheel that can fix the rotation of the wheel was derived. Referring to FIG. 6 showing a stationary rotating wheel, the rotating shaft 96 of the stationary rotating wheel 95 is provided with a rotation fixing means 97. When the fixed rotary wheel 95 is installed at the bottom of the leg of the transport device, the user can move the transport device to a desired position and then secure the wheel 98 by tightening the rotation fixing means 97 so as to stably. Can work. However, each time the moving device is moved, it is not efficient because the user must manually loosen the rotation fixing means 97 connected to the respective rotation wheels 95. In addition, since the fixed rotary wheel 95 is located at the bottom of the transport device leg, there is an inconvenience that the user must sit each time to release the rotation fixing means (97). In particular, even when the user incorrectly selected the working position to move the conveying device again, the rotation fixing means 97 must be released and retightened each time. As such, the conventional rotary wheels 90 and 95 have a problem of slipping easily, or need to be manually re-released and tightened every time the rotation fixing means 97 moves.

Accordingly, an object of the present invention is to provide a wheel rotation fixing device that can easily fix the rotation of the wheel.

Wheel rotation fixing device of the present invention for achieving the above object,

A wheel support radially surrounding a portion of a wheel having a rotating shaft at a center thereof and connected to the rotating shaft;

A moving part formed in a shape surrounding the wheel support, connected to the rotating shaft to move up and down with respect to the wheel and the wheel support by a predetermined distance, and on one side a fixture that can fix the rotation of the wheel when moving downwards of the moving part A moving part provided above the wheel;

And an elastic body inserted between an upper end of the moving part and an upper end of the wheel support.

When a load is applied to the hollow leg connected to the upper end of the moving part, the moving part moves downward by a predetermined distance, and the rotation of the wheel is automatically fixed by contacting the wheel, and when the load applied to the leg is removed. The moving part is configured to move upward by a predetermined distance by the restoring force of the elastic body so that the fastener is separated from the wheel so that the wheel can rotate.

As the wheel rotation fixing device of the present invention configured as described above, the wheel is automatically fixed when a load is applied to the leg, the user does not need to manually operate to fix the wheel is convenient to use.

Preferably, the guide pillar is fixed to the upper end of the wheel support and the elongated guide hole is formed in the upper end of the moving portion is inserted, the movable portion can move up and down along the guide pillar inserted into the guide hole.

Preferably, the leg is disposed so that the guide pillar fixing means can be detached through the leg in a position in contact with the top of the guide pillar,

When a load is applied to the leg, the guide pillar fixing means contacts the upper end of the guide pillar, thereby preventing the downward movement of the moving part provided with the fixture, and the wheel may rotate even when a load is applied.

In particular, the bridge is a rotary pin of the rotation rotatable upwards by a certain height relative to the upper end of the guide pillar across the bridge, the pin is fixed to the long or oval stopper inside the hollow leg,

When the long axis of the stopper is brought into contact with the upper end of the guide pillar by rotating the pivot pin by 90 °, even if a load is applied to the leg, the stopper is brought into contact with the upper end of the guide pillar, thereby preventing the downward movement of the movable part provided with the fastener. The wheel can be rotated, and when the load is applied by rotating the pivot pin 180 ° in the original position, the moving part moves downward to fix the rotation of the wheel automatically.

In practice, the wheel may need to rotate even when a load is applied to the leg. In this case, the guide pillar fixing means or stopper prevents the downward movement of the moving part to allow the wheel to rotate. In addition, since the stopper is fixed to the rotatable pivot pin, the stopper can be easily operated through the rotation of the pivot pin.

Preferably, the pivot pin may be connected to the pivot pin of another wheel rotation fixing device to form a semi-circular, semi-elliptic, or rectangular. As such, by configuring the linear pivot pin to rotate at a predetermined distance with respect to the rotation axis of the pivot pin every two wheel rotation fixing devices, the user can more easily rotate the stopper.

Preferably, the leg may be connected upwardly to the center or one side of the upper end of the moving part so that the moving part rotates 360 ° left and right with respect to the leg. Therefore, when the wheel rotation fixing device of the present invention is used at the bottom of the transporter leg, the moving part can be rotated left and right to easily move the transporter in the desired direction.

In the wheel rotation fixing device of the present invention configured as described above, when a load is applied to the leg, the moving part and the fixture move downward to fix the wheel automatically. Therefore, when the user climbs on the transport device provided with the wheel rotation fixing device, the wheel is automatically fixed, so there is no need for a separate manual operation for fixing the wheel, and thus it is easy to use.

In addition, when the wheel is fixed due to the load of the work tool, etc. placed on the conveying device, the wheel can be rotated at all times by using the guide column fixing means or the stopper. Therefore, the conveying device can be moved with the work tool on it, which is very convenient. The stopper is fixed to the rotatable pivot pin, and the pivot pin is configured to rotate about a certain distance about the rotation axis of the pivot pin every two wheel rotation fixtures, so that the user can easily operate the stopper using the foot. .

In addition, since the moving part can rotate left and right with respect to the leg, if the transport device is configured by the wheel rotation fixing device of the present invention can easily move the transport device in the desired direction.

Hereinafter, the present invention will be described in more detail with reference to specific embodiments with reference to the accompanying drawings.

1 is a perspective view showing a wheel rotation fixing device 70 according to a preferred embodiment of the present invention, showing a rotating state (state in which the wheel can rotate) is not applied to the leg 60. As shown, the wheel 10 in this embodiment is radially surrounded in part by the wheel support 20, the wheel support 20 is connected to the rotary shaft 12 of the wheel. The wheel support 20 is surrounded by a moving part 40, the moving part 40 is also connected to the rotary shaft 12 of the wheel, unlike the wheel support 20 and the rotary shaft 12 to move up and down Longitudinal elongated grooves 46 are formed in the portions to be joined. Therefore, the moving part 40 may move up and down with respect to the wheel support 20 and the wheel 10, unlike the wheel support 20 fixedly connected to the wheel 10.

The moving part 40 is provided with a fastener 44 between the top of the moving part and the wheel 10. The fastener 44 may be made of a material having excellent elasticity and friction such as synthetic rubber to fix the rotating wheel 10, or may be made of another suitable material according to the material of the wheel 10. . In addition, irregularities are formed on the bottom surface of the fixture 44 to increase the frictional force. The fixture 44 is fixed to the moving part 40 and moves up and down together with the moving part 40. Therefore, when the moving unit 40 moves downward, the fixture 44 also moves downward to contact the wheel 10, thereby fixing the rotation of the wheel 10. In the illustrated example, the wheel 10 is rotated so that there is a predetermined distance H between the fixture 44 and the wheel 10.

A hollow leg 60 is connected to the upper end of the moving part 40 upwards. As shown in FIG. 2A to be described below, the leg 60 and the moving part 40 are connected to rotate left and right. Preferably, ball bearings or thrust bearings or the like may be used. The leg 60 is connected to one side rather than the center of the upper portion of the moving part 40. This constitutes the axis of the leg 60 and the rotation center of the wheel 10 eccentrically, so that when the leg 60 moves horizontally, the wheel 10 automatically parallels the horizontal movement direction of the leg 60. To make the horizontal movement easier.

The leg 60 is provided with a linear pivot pin 62 on a predetermined height of the moving part 40. The pivot pin 62 penetrates the hollow leg 60 and has a circular cross section of a predetermined diameter, so that the pivot pin 62 can rotate about the leg 60. As shown in FIG. 2A to be described below, the linear pivot pin 62 is coupled with the stopper 64 inside the hollow leg 60. One side of the rotation pin 62 may be connected to the rotation pin 62 of the other wheel rotation fixing device 70, as shown in Figure 4 to be described below. Since the pivot pin 62 is bent and connected to the pivot pin 62 of the other wheel rotation fixing device 70 to form a rectangular shape, the user can easily rotate the pivot pin 62 with a small force. .

Hereinafter, the internal structure of the wheel rotation fixing device 70 of the present invention through a cross-sectional view in more detail.

Figure 2a is a cross-sectional side view of the wheel rotation fixing device 70 according to a preferred embodiment of the present invention, the rotation state is shown in the figure. As shown, the guide pillar 30 of a cylindrical shape having a constant diameter is fixed to the top of the wheel support 20. The guide pillar 30 is inserted into the guide hole 42 formed on the upper portion of the moving part 40 and serves to guide the moving part 40 to move up and down with respect to the wheel support 20. Guide pillar 30 is inserted into the guide hole 42 is configured to support the wheel 10 via the wheel support 20, it is preferable to manufacture a high-strength material such as high-strength aluminum alloy. The upper end of the guide pillar 30 is formed wider than other portions so as not to be caught by the side of the guide pillar 30 when the stopper 64 is rotated. In addition, the upper end of the guide pillar 30 is formed so wide that the center is pitted, which is to be described later as the stopper 64 is rotated by 90 ° (the wheel can be rotated at all times even if a load is applied) In order to achieve a state), the moving part 40 can easily rotate from side to side with respect to the leg 60.

The guide hole 42 into which the guide pillar 30 is inserted is formed at the upper end of the moving part 40. The guide hole 42 is formed long in the vertical direction so that the moving part 40 can move in a predetermined direction along the guide pillar 30. In addition, the elongated guide hole 42 allows the wheel support 20 to be firmly supported on the upper portion of the moving part 40 through the guide pillar 30.

An elastic body 50 is provided between the upper end of the moving part 40 and the wheel support 20. The elastic body 50 serves to return the moving part 40 to the rotation state when the load 68 applied to the leg 60 is removed. The elastic body 50 may be composed of soft synthetic rubber, a small leaf spring, etc. having excellent restoring force, but is preferably configured in the form of a roll spring surrounding the outer surface of the guide pillar 30. The roll spring is preferably compressed so that the gap between the top of the moving part 40 and the top of the wheel support 20 is minimized when the moving part 40 moves downward to achieve a fixed state (a state in which the wheel cannot rotate). It consists of a roll spring with a small height. The elastic modulus of the elastic body 50 may be appropriately adjusted in some cases. That is, the elastic body 50 is made of a modulus of elasticity that can be compressed to the weight of the user without being deformed to the weight of the transport device itself when manufacturing the transport device using the wheel rotation fixing device 70.

The leg 60 is provided with a linear pivot pin 62 at a predetermined height above the guide pillar 30, and the stopper 64 is fixed to the pivot pin 62 with the pivot pin at the center. As described above, since the rotation pin 62 is configured to be inserted into the hole drilled in the hollow leg 60 and to rotate, the stopper 64 fixed to the rotation pin 62 also includes the rotation pin 62. Can rotate

The stopper 64 fixed to the pivot pin 62 is preferably oval. The other circular stopper 64 rotates by 90 ° so that the wheel rotation fixing device 70 is always rotated or rotated (fixed state). That is, when the long axis of the elliptical stopper 64 is placed in the horizontal direction (A), since the stopper 64 can move freely downward, when the load 68 is applied to the leg 60, the wheel rotation fixing device 70 ) Is in a fixed state, and is placed in rotation when the load 68 is completely removed or only a small load is applied. On the other hand, when the long axis of the elliptical stopper 64 is placed in the vertical direction (B), the long axis of the stopper 64 is brought into contact with the centered upper portion of the guide pillar 30 so that the stopper 64 moves downward. It becomes impossible. Therefore, even when a load 68 is applied to the leg 60, the load 68 is transmitted to the guide pillar 30 through the stopper 64, so that the moving part 40 does not move toward the wheel 10. As a result, the wheel rotation fixing device 70 is in a constant rotation state in which the wheel can always rotate because the fixture 44 is not engaged with the wheel 10 even when a load 68 is applied. In this case, since the long axis surface of the stopper 64 and the recessed central surface of the upper end of the guide pillar 30 both form a circular surface, the stopper 64 contacts the point contact form instead of the surface contact. Accordingly, even in the state of constant rotation, the moving part 40 may freely rotate left and right with respect to the leg 60, so that even when the leg 60 is moved horizontally, the wheel 10 may move in the direction of movement of the leg 60. Can be paralleled automatically.

Hereinafter, look at the operating state of the wheel rotation fixing device 70 of the present invention in more detail through several drawings.

As shown in FIG. 2A, when the long axis of the stopper 64 lies horizontal (A) and no load 68 is applied to the leg 60 or only a small load is applied, the preferred practice of the present invention. Wheel rotation fixing device 70 according to the example is to achieve a rotation state that the wheel can rotate. In this state, the upper end of the moving part 40 is opened to a considerable distance from the upper end of the wheel support 20 by the restoring force of the elastic body 50, and the gap is spaced between the longitudinal groove 46 and the wheel formed in the moving part 40. It is limited by the rotation axis 12 of abutting. Since the moving part 40 and the wheel support 20 are separated from each other by a considerable distance, the fastener 44 fixed to the upper part of the moving part 40 does not come into contact with the wheel 10 and the wheel can rotate.

FIG. 2B is a front view of the wheel rotating fixture of FIG. 2A in a rotating state, and FIG. 2C is a front sectional view of the wheel rotating fixing of FIG. 2A along the line C-C. As shown in Figure 2b, in the rotation state, the fixture 44 attached to the moving part 40 is separated from the wheel 10 by a predetermined distance (H).

Figure 3a is a side cross-sectional view showing a fixed state of the wheel rotation fixing device 70 according to a preferred embodiment of the present invention. As shown, when the long axis of the stopper 64 lies horizontal (A) and the load 68 is applied to the leg 60, the wheel rotation fixing device 70 according to a preferred embodiment of the present invention is fixed State is achieved. Since the long axis of the stopper 64 is horizontally positioned (A), the stopper 64 does not come into contact with the upper end of the guide pillar 30 so that the moving part 40 may move freely downward. In this state, the upper end of the moving part 40 moves downward, compressing the elastic body 50 by the load 68 applied to the leg. Therefore, the fastener 44 fixed to the upper portion of the moving part 40 also moves downward to compress one surface of the wheel 10, so that the wheel cannot rotate. However, when the wheel 10 or the fastener 44 is made of a soft material, the wheel 10 or the fastener 44 may be damaged when an excessive load 68 is given. In order to prevent this, preferably, the longitudinal groove 46 formed in the moving part 40 and the rotating shaft 12 of the wheel abut so as to limit the downward movement distance of the moving part 40.

3B is a front view of the wheel rotation lock of FIG. 3A in a stationary state, and FIG. 3C is a front sectional view of the wheel rotation lock of FIG. 3A along the line D-D. In the fixed state, since the moving part 40 moves downward along the guide pillar 30 inserted into the guide hole 42, as shown in FIG. 3B, the fastener 44 attached to the moving part is wheels 10. Will be compressed.

Finally, when the long axis of the stopper 64 in the vertical (B) in Figure 2a, the wheel rotation fixing device 70 in accordance with a preferred embodiment of the present invention is always rotated. In this state, as described above, the long axis of the vertical elliptical stopper 64 is brought into contact with the recessed upper center portion of the guide pillar 30, so that the stopper 64 cannot move downward. Therefore, even if a load 68 is applied to the leg 60, the moving part 40 and the fixture 44 fixed thereto cannot move toward the wheel 10, thereby achieving a constantly rotating state in which the wheel can always rotate. . In addition, since the long axis surface of the stopper 64 and the recessed center surface of the upper end of the guide pillar 30 are in point contact, the moving part 40 may be freely rotated left and right even at all times.

Such a constant rotation state can be very conveniently used when using a transport device equipped with a wheel rotation fixing device of the present invention. That is, when a work tool, etc. required for work is placed on the support on the top of the transport device, the transport device may not be moved due to the fixed state of the work tool. In this case, by operating the stopper 64 to be in a vertically rotated state by rotating the stopper 64, it is possible to move the conveying device with the work tool, etc., thus increasing usability.

As shown in the front view of FIG. 2B and the front sectional view of FIG. 2C, even in this state, the fastener 44 attached to the moving part 40 is separated from the wheel 10 by a predetermined distance H in a rotational state.

Figure 4 is a perspective view showing a transport device 80 is provided with a wheel rotation fixing device 70 according to a preferred embodiment of the present invention. The conveying device 80 is composed of, for example, a plate-shaped pedestal 66 and several legs 60 fixed below the pedestal, and a wheel rotation fixing device 70 according to a preferred embodiment of the present invention connected to the bottom of the leg. do. As described above, the wheel 80 is automatically fixed when the load 68 is given to the pedestal 66 (for example, when the user is lifted), so that a separate device for fixing the transport device 80 is provided. No manual operation is required.

Wheel rotation fixing device 70 may be provided on all legs 60, but may be provided only on two or more of the legs (60). Even if only two or more wheels 10 are fixed in rotation, the conveying device 80 is safe against horizontal slippage. In addition, the remaining leg 60 can reduce the manufacturing cost by connecting a conventional rotary wheel (90,95), which is relatively inexpensive manufacturing cost.

As described above, one side of the rotation pin 62 provided in the leg 60 is connected to each other with the rotation pin 62 of the other wheel rotation fixing device 70, preferably bent to form a rectangular shape Connected. In order to switch from the rotating state (fixed state) to the always rotating state, the user must turn the rotation pin 62. In this case, when the rotation pin 62 is connected in a rectangular shape, the rotation of the rotation pin becomes easy, so that the user can easily rotate the rotation pin 62 even with a foot.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the above-described embodiments, and the general knowledge in the field of the present invention without departing from the gist of the present invention as claimed in the following claims. Of course, any one having a variety of modifications can be made, of course, such modifications are within the scope of the claims.

1 is a perspective view showing a wheel rotation fixing device according to a preferred embodiment of the present invention,

Figure 2a is a side cross-sectional view showing a rotational state and a constant rotation state of the wheel rotation fixing device according to a preferred embodiment of the present invention,

Figure 2b is a front view showing a state of rotation and constant rotation of the wheel rotation fixing device according to a preferred embodiment of the present invention,

Figure 2c is a front cross-sectional view showing the rotational state and the usual rotational state of the wheel rotation fixing device according to a preferred embodiment of the present invention along the line C-C of Figure 2a,

Figure 3a is a side cross-sectional view showing a fixed state of the wheel rotation fixing device according to a preferred embodiment of the present invention,

Figure 3b is a front view showing a fixed state of the wheel rotation fixing device according to a preferred embodiment of the present invention,

Figure 3c is a front sectional view showing a fixed state of the wheel rotation fixing device according to a preferred embodiment of the present invention along the line D-D of Figure 3a,

Figure 4 is a perspective view showing a transport device provided with a wheel rotation fixing device according to a preferred embodiment of the present invention,

5 is a perspective view of a conventional rotating wheel,

6 is a perspective view showing a conventional fixable rotating wheel.

Claims

A wheel support 20 radially surrounding a portion of the wheel 10 having a rotation shaft 12 provided at a center thereof and connected to the rotation shaft 12;

As the moving part 40 formed to surround the wheel support 20, the wheel 10 and the wheel support 20 is connected to the rotary shaft 12 to move up and down a predetermined distance (H) with respect to the wheel support (20) On one side, the moving part 40 having a fastener 44 that can be fixed to the rotation of the wheel 10 when moving downwards of the moving part 40 with respect to the wheel;

And an elastic body 50 inserted between the upper end of the moving part 40 and the upper end of the wheel support 20.

When a load is applied to the hollow leg 60 connected to the upper end of the moving part, the moving part 40 moves downward so that the fastener 44 contacts the wheel 10 and the rotation of the wheel is automatically fixed. When the load applied to the leg 60 is removed, the moving part 40 moves upward by the restoring force of the elastic body 50 so that the fastener 44 falls from the wheel 10 so that the wheel can rotate. Wheel rotator (70).

The method of claim 1,

The guide pillar 30 is fixed to the upper end of the wheel support 20, the long guide hole 42 is formed in the upper end of the moving part 40 is inserted into the guide pillar 30, the moving part 40 ) Wheel rotation fixing device 70, characterized in that it moves up and down along the guide pillar (30) inserted into the guide hole (42).

The method of claim 2,

In the leg 60, the guide pillar fixing means is disposed at a position in contact with the upper end of the guide pillar 30 so as to be removable through the leg 60,

When a load is applied to the leg 60, the guide pillar fixing means abuts against the upper end of the guide pillar 30 to prevent the downward movement of the moving part 40 provided with the fixture 44, thereby preventing the load from being applied. Wheel rotation fixing device 70, characterized in that the wheel 10 can be rotated even if applied.

The method of claim 2,

A linear pivot pin 62 rotatable upwardly by a predetermined height with respect to the upper end of the guide pillar 30 penetrates across the leg 60 in the leg 60, and the pivot pin 62 is hollow. A long or oval stopper 64 is fixed inside the leg 60,

When the long axis of the stopper 64 is brought into contact with the upper end of the guide pillar 30 by rotating the pivot pin 62 by 90 °, the stopper 64 is guided by the guide pillar 30 even when a load is applied to the leg 60. By contacting the upper end of the) and the downward movement of the moving part 40 is provided with the fastener 44 is blocked, the wheel 10 can be rotated, the rotating pin 62 is rotated to its original position or 180 ° load In the case of applying the wheel 40, the moving part 40 moves downwards, and the rotation of the wheel 10 is automatically fixed.

The method of claim 4, wherein

The rotation pin 62 is a wheel rotation fixing device 70, characterized in that the rotation pin and the semi-circular, semi-elliptic, or rectangular to each other and the rotation of the wheel rotation fixing device.

The method according to any one of claims 1 to 5,

Wheel rotation fixing device, characterized in that the leg 60 is connected upwards to the center or one side of the upper portion of the moving part 40 so that the moving part 40 rotates 360 ° left and right with respect to the leg 60. 70.