KR102573169B1 - A caster for furniture - Google Patents

Abstract

The present invention relates to a caster that stably fixes furniture such as a desk or chair and moves it smoothly.
The present invention implements a new type of caster capable of fixing the wheel to the upper or lower limit position with a simple button operation and maintaining the free rising and falling state of the wheel, so that when using furniture such as a chair or desk Of course, convenience can be pursued when moving, while the durability of the button can be maintained firmly even during frequent operation by adding metal reinforcing plates to both sides of the button, which has a structure that enables slide operation. In addition, casters for furniture that can ensure smooth operation of buttons are provided.

Description

Casters for furniture {A CASTER FOR FURNITURE}

The present invention relates to a caster for furniture, and more particularly, to a caster that stably fixes and smoothly moves furniture such as a desk or chair.

Chairs, desks, tables, etc., which are usually used in schools, libraries, academies, offices, etc., are bulky and heavy, so it is difficult to move them for reasons such as cleaning.

For this reason, most of them drag on the floor, causing a lot of noise, and desks and chairs are often worn and damaged by friction.

For example, when a desk or chair is moved, the bottom surfaces of the legs directly contact the floor, so noise is generated due to the contact between the bottom surfaces of the legs and the floor when moving while the legs are in contact with the floor.

This noise acts as a serious stress to others when considering the characteristics of the place where the desk or chair is used, and in addition, there is a great concern that the floor, that is, the surface of the home or office flooring, is scratched and damaged by friction with the legs. there is.

In addition, furniture such as tables and chairs as well as desks and chairs are not often moved, but when moving to reorganize furniture, it is very heavy, so if the bottom of the legs is dragged on the floor during the moving process, the legs of the furniture may be damaged or twisted. there is a problem.

Therefore, in recent years, many products in which casters are installed on the legs of tables and chairs as well as desks and chairs are being released.

In the case of a product equipped with such a caster device, there is an advantage in that it requires less force during movement, there is no fear of noise or damage, and the fear of scratching the floor can be completely eliminated.

However, in the case of conventional casters mounted on furniture such as desks or chairs, loads are applied to parts such as bearings or shafts during use, resulting in poor durability and functionality, and in severe cases, poor operation.

In addition, in order to fix it in one place, there are disadvantages in terms of structure or manufacturability, such as having to additionally mount a separate stopper, and there is a disadvantage in that manufacturing cost increases.

In addition, there are cases in which various functions are required depending on the use of the product. In this case, there is a disadvantage in that several chairs such as a chair with a fixed function, a chair with a moving function, and a chair with a fixed function when sitting are required to be purchased.

Registered Patent Publication No. 10-1037763 Registered Patent Publication No. 10-1450158 Registered Patent Publication No. 10-1557992 Registered Patent Publication No. 10-2267115

Therefore, the present invention has been devised in view of this point, and a new type of caster capable of fixing the wheel to the upper or lower limit position with a simple button operation and maintaining the free rising and falling state of the wheel By implementing the present invention, an object of the present invention is to provide a caster for furniture that can pursue convenience when moving as well as when using furniture such as a chair or desk.

In addition, another object of the present invention is to maintain the durability of the button firmly even during frequent operation by attaching a reinforcing plate made of metal to both sides of the button having a structure capable of slide operation, and in addition, smooth operation of the button An object of the present invention is to provide a caster for furniture that can secure the castle.

To achieve the above object, the caster for furniture provided by the present invention has the following characteristics.

The caster for furniture includes a housing having vertical long holes on both side walls, a cover closing the lower part of the housing, a connecting rod vertically installed on an upper surface of the rear end of the housing and connected to the furniture side, and a long hole of the housing horizontally. A pair of wheels supported at both ends of the penetrating shaft and capable of moving up and down and rotating, and a pair of wheels located inside the housing and installed in a structure capable of sliding forward and backward so that the front and rear ends can selectively protrude out of the housing, including wheels. As a means for regulating the vertical position of the shaft, a frame member having a space in which the shaft can relatively move back and forth and up and down, and a button having an shaft support member formed at an upper and lower intermediate height from the inner front side of the frame member, and inside the housing In addition to being installed, it includes a shaft support that is movable up and down together with the shaft while being elastically supported by an upper spring while being coupled to the shaft.

Therefore, the caster for furniture can fix the wheel to the upper limit position or the lower limit position by sliding the button back and forth, and can freely maintain the wheel in a raised or lowered state.

Further, the frame members of the button may be formed of a pair vertically disposed parallel to both sides at a predetermined left and right interval.

The caster for furniture may further include a reinforcing frame member made of a metal material having the same shape as the frame member as a means installed on one side of the frame member of the button to reinforce the rigidity of the frame member.

Here, the reinforcing frame member may include a reinforcing shaft supporting member installed on one side of the shaft supporting member in the frame member.

The caster for furniture provided by the present invention has the following effects.

First, a new caster is applied that can fix the wheel to the upper limit position relative to the housing position and the lower limit position relative to the housing position through the slide operation of the button, and maintain the free rise and fall of the wheel. By doing so, there is an effect of pursuing convenience when moving as well as when using furniture such as a chair or desk.

Second, by adding reinforcing plates made of metal material to both sides of the button, durability of the button can be firmly maintained even during frequent operation, and smooth operability of the button can be secured.

1 to 3 are perspective views illustrating casters for furniture according to an embodiment of the present invention;
4 to 6 are cross-sectional views showing a state of use of a caster for furniture according to an embodiment of the present invention.

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

1 to 3 are perspective views illustrating a caster for furniture according to an embodiment of the present invention.

As shown in FIGS. 1 to 3 , the caster for furniture has a structure capable of fixing the wheels to an upper limit position or a lower limit position by sliding a button back and forth, and maintaining the wheels in a freely raised and lowered state. will lose

To this end, the caster for furniture includes a housing 11 as a means for providing an installation space for buttons and the like.

The housing 11 is in the form of a case made of plastic material or the like with a hollow inside and a hole in the bottom, and long holes 10 in the form of long up and down tears are formed on both side walls, and buttons 18 are formed on the front and rear parts. ), button holes 23 for penetrating, that is, button holes 13 with open bottoms are formed, respectively, and a cylindrical connecting rod coupling part 24 for fastening the connecting rod 13 is formed on the inner rear end side. .

At this time, the connecting rod connecting portion 24 is opened upward so that the connecting rod 13 can enter and be fastened to the connecting rod connecting portion 24 through this place.

In addition, a spring support pin 25 is formed on the inner upper side of the housing 11, and the upper end of the spring 19 can be inserted into and supported by the spring support pin 25 thus formed.

In addition, the caster for furniture includes a cover 12 as a means for closing the lower portion of the housing 11 .

The cover 12 is in the form of a rectangular plate made of plastic material, etc., and is installed in a structure in which it is fitted into the lower open portion of the housing 11 and is screwed to the housing 11 through two places at the front and rear. .

In addition, the caster for furniture includes a connecting rod 13 as a means for connecting the caster side and the furniture side.

The connecting rod 13 is in the form of a rod made of a metal material, etc., and is coupled to the connecting rod connecting portion 24 formed on the side of the housing 11 through the lower end and coupled to the furniture (not shown) side through the upper end. installed in the structure

At this time, it is preferable that the connecting rod 13 adopts a bolt shape having a screw thread formed on the outer circumferential surface so as to be coupled to the connecting rod coupling part 24 of the housing 11 and the furniture side in a screw fastening structure.

In addition, the caster for furniture includes a circular wheel 15 as a means for moving furniture.

The wheels 15 are formed as a pair and are disposed on both side surfaces of the housing 11, and in this state are supported on both ends of a shaft 14 passing through the long hole 10 of the housing 11 horizontally, moving and rotating up and down. installed in this possible structure.

Here, the wheel 15 can be rotated together with the shaft 14, or the shaft 14 can be left as it is and only the wheel 15 can be rotated. The joint between the shaft 14 and the wheel 15 It is preferable to rotate only the wheel 15 through a bearing (not shown).

In addition, the caster for furniture includes a button 18 as a means for regulating the vertical position (vertical movement) of the wheel 15 .

The button 18 is in the form of a rectangular flat block having a space penetrating through the thickness at the middle of the length and width (eg, a space where a shaft support, a connecting rod coupling part, etc. can be located), and the front surface of the housing 11 It is installed in a structure capable of sliding back and forth while being positioned inside the housing 11 by horizontally penetrating the button hole 23 formed on the side and the rear side.

The front end and the rear end of the button 18 installed in this way are exposed to the outside, and when a user presses the button 18 by hand, the front end and the rear end can selectively protrude out of the housing 11 .

On both sides of the button 18, there is a space 29 in which the shaft 14 can move back and forth and up and down, for example, when the button 18 is pushed back and forth, the position of the shaft 14 in place is relatively A rectangular frame member 16 having a space 29 that allows it to be moved is formed in a structure in which it is erected vertically.

Here, the frame members 16 may be formed as a pair vertically disposed side by side while facing each other at a predetermined left and right interval.

Further, in the front of the space 29 of the frame member 16, a shaft supporting member 17 is formed horizontally at an intermediate height.

At this time, the shaft support member 17 has a length extending to about the middle of the front-to-back distance in the space 29 of the frame member 16, and accordingly, the space 29 of the frame member 16 is the shaft support member 17, it can be made up of a “⊃”-shaped space 29, and eventually the axis 14 located in the space 29 of the frame member 16 also moves along the “⊃”-shaped locus. can be moved to

In addition, the caster for furniture includes a shaft supporter 20 and a spring 19 as means for elastically supporting the vertical movement of the shaft 14 .

The shaft support 20 is formed in the form of a square housing having an open top, a spring seating groove 26 formed therein, and a shaft through-hole 27 horizontally penetrating at the lower end.

The shaft support 20 is installed inside the housing 11 and is coupled to the shaft 14 using the shaft through hole 27 so as to be movable up and down together with the shaft 14 .

The spring 19 is installed in a structure in which upper and lower ends are supported in the spring support pin 25 on the upper inner circumference of the housing 11 and the spring seating groove 26 of the shaft support 20.

The spring 19 installed in this way always exerts a force that pushes the shaft support 20 downward, and accordingly, the entire shaft 14 and the wheel 15 including the shaft support 20 are always pressed downward As a result, the button 18 is positioned forward and the wheel 15 can always be positioned lower than the housing 11 under the condition that no external force is applied, such as when the user sits on a chair.

In addition, the caster for furniture includes a reinforcing frame member 21 as a means for reinforcing the rigidity of the button 18, particularly the overall rigidity of the frame member 16 including the shaft supporting member 17.

The reinforcing frame member 21 is installed on one side, for example, the outer side of the frame member 16 to reinforce the rigidity of the frame member 16, and at this time, the reinforcing frame member 21 ) is made of a metal material forming the same shape as the frame member 16, for example, a square frame shape.

This reinforcing frame member 21 can be installed in a structure in which it is inserted and seated in a member seating groove 28 on one side of the frame member 16.

And, the reinforcing frame member 21 is formed with a reinforcing shaft supporting member 22 installed on one side of the shaft supporting member 17 in the frame member 16 to increase the rigidity of the shaft supporting member 17 serves to reinforce it.

As an example, the reinforcing shaft supporting member 22 is formed horizontally at an upper and lower middle height in front of the inner space of the reinforcing frame member 21, and the reinforcing shaft supporting member 22 at this time is a frame member It has a length that extends to about the middle of the space between the front and rear, and is closely disposed on the side surface of the shaft support member 17 in the frame member 16 to strengthen the rigidity of the shaft support member 17.

By reinforcing the reinforcing frame member 21 and the reinforcing shaft supporting member 22 in the frame member 16 and the shaft supporting member 17 in this way, even when a load such as a user sitting on a chair is applied to the caster side, a sturdy Structural rigidity can be maintained, and as a result, it is possible to secure excellent operability as well as solid durability of the caster.

4 to 6 are cross-sectional views showing a state of use of a caster for furniture according to an embodiment of the present invention, which shows a state of use of a caster installed in a chair among furniture items.

As shown in FIG. 4, when the user does not sit on a chair while the button 18 is pushed forward, the housing 11 rises upward by the force exerted by the spring 19 and falls from the floor. In addition, while the wheel 15 is in a relatively lowered state, it comes into contact with the floor.

At this time, the shaft 14 moving together with the wheel 15 is positioned downward in the space behind the frame member 16 of the button 18.

Accordingly, when the user pushes or pulls the chair, the chair can be easily moved through the rolling motion of the wheels 15 .

When a user sits on a chair while pushing the button 18 forward, the housing 11 descends as a load is applied to the chair, and the cover 12 touches the floor. The load is applied to the rest of the parts other than the wheel 15, for example, the housing 11 and the cover 12.

At this time, the shaft 14 moving together with the wheel 15 is positioned upward in the space behind the frame member 16 of the button 18.

Accordingly, in the case of using a chair, the wheels 15 are not affected by the load at all, and eventually the wheels 15 and the like can be protected from fatigue and loads caused by the load, so that the wheels 15, etc. It is possible to extend the durability life of the caster by increasing the durability of the caster.

As shown in FIG. 5, here shows a state in which the chair is used while the wheel 15 is lowered, that is, the wheel 15 is fixed with the wheel 15 in contact with the floor.

That is, when the user pushes the button 18 protruding forward backward in a state where the user is not sitting on a chair (eg, a state where no load is applied), the axis 14 enters the front of the space of the frame member 16 and It is located below the support member 17, and in this state, even when the user sits on the chair, the shaft 14 is constrained within the frame member 16, that is, the housing 11 including the frame member 16 and the like While the whole is constrained to the shaft 14, the downward movement of the housing 11 and the chair is fixed.

Accordingly, even if the user sits on the chair, the entire chair including the housing 11 does not go down, and in this state, the user can move the chair using the wheels 15 even while sitting on the chair. do.

As shown in FIG. 6, here shows a state in which the chair is used in a state in which the wheel 15 is raised, that is, the housing 11 and the cover 12 are fixed in a state in which they are in contact with the floor.

That is, when the user pushes the button 18 protruding forward while sitting on a chair (for example, a load is applied to the chair), the shaft 14 enters the front of the space of the frame member 16 and Located above the supporting member 17, even when the user gets up from the chair in this state, the shaft 14 is constrained within the frame member 16, that is, the housing 11 including the frame member 16 and the like As the whole is constrained to the shaft 14, the upward movement of the housing 11 and the chair is fixed.

Accordingly, even if the user stands up from the chair, the entire chair including the housing 11 does not go up, and the housing 11 and the cover 12 remain in contact with the floor. In a fixed state, the user can use the chair.

If the chair is fixed to the floor in this way, even when the user is not sitting on the chair, the chair will not move until the user forcibly moves it, and the chair will not move even if the chair is knocked carelessly. , the chair can be stably fixed and used.

As an example, in the case of sitting on a chair and conducting experiments in a laboratory or science room that handles chemicals, etc., it is more effective to fix the chair so that it does not move. If you fix it to the floor while doing it, you can work more safely and efficiently.

As such, in the present invention, a new caster capable of selectively maintaining a state in which the wheel is raised above the housing, a state in which the wheel is placed below the housing, and a state in which the wheel moves freely up and down by simply manipulating the button back and forth. By providing a chair, you can use it in various places, such as where you need a chair with wheels or a chair without wheels, according to the situation at the time, and move furniture as well as when using furniture such as chairs and desks. Convenience can be achieved, and by reinforcing the metal material on the side of the button that receives a lot of load, the durability of the button can be firmly maintained even when a load is applied, and smooth operation of the button can be secured.

10 : long hole
11: housing
12 : cover
13: connecting rod
14: axis
15: wheel
16: frame member
17: shaft support member
18 : button
19 : Spring
20: shaft support
21: reinforcement frame member
22: shaft support member for reinforcement
23 : button hole
24: connector joint
25: spring support piece
26: spring seating groove
27: shaft through hole
28: member seating groove

Claims (4)

A housing 11 having vertical long holes 10 on both side walls;
a cover 12 closing the lower portion of the housing 11;
a connecting rod 13 installed vertically on the upper surface of the rear end of the housing 11 and connected to the furniture side;
A pair of wheels 15 capable of moving up and down and rotating while being supported on both ends of the shaft 14 passing through the long hole 10 of the housing 11 horizontally;
In addition to being located inside the housing 11, the front and rear ends are installed in a structure capable of sliding forward and backward so that the front and rear ends can selectively protrude out of the housing 11, thereby regulating the vertical position of the shaft 14 including the wheels 15. button 18 to do;
A shaft support 20 installed inside the housing 11 and coupled to the shaft 14 while being elastically supported by an upper spring 19 and movable up and down together with the shaft 14;
Including, the wheel 15 can be fixed to the upper limit position or the lower limit position through the front and rear slide operation of the button 18, and the wheel 15 can be freely raised and lowered,
On both sides of the button 18, a rectangular frame member 16 having a space 29 in which the axis 14 can relatively move back and forth and up and down is formed in a vertically erect structure, and the frame member 16 ) is made of a pair that is vertically disposed side by side while facing each other at regular left and right intervals, and the shaft support member 17 is horizontal at the upper and lower intermediate heights to the front in the space 29 of the frame member 16 It is formed, but the shaft supporting member 17 has a length extending to about the middle of the space 29 of the frame member 16, and thus the space 29 of the frame member 16 is an axis Being partitioned by the support member 17, it can be made of a “⊃”-shaped space 29, and eventually the shaft 14 located in the space 29 of the frame member 16 also follows a “⊃”-shaped locus. A caster for furniture, characterized in that it can be relatively moved along.
delete The method of claim 1,
As a means installed on one side of the frame member 16 of the button 18 to reinforce the rigidity of the frame member 16, a reinforcing frame member made of a metal material while forming the same shape as the frame member 16 ( 21) caster for furniture, characterized in that it further comprises.
The method of claim 3,
The reinforcing frame member (21) includes a reinforcing shaft supporting member (22) installed on one side of the shaft supporting member (17) of the frame member (16).

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