KR102022348B1 - A leg for lecture desks - Google Patents

Abstract

The present invention relates to a desk leg for teaching, wherein the desk leg is fixed in a use position where the desk top plate 1 is unfolded, and the desk top plate is movable by a wheel of a wheel caster provided at the bottom of the leg in a storage position where the desk top plate is flipped. A lecture desk leg having a lifting rod 5 provided on a leg portion in accordance with the position of (1) to move up and down, interlocked with a lifting rod 5 that moves up and down in accordance with the position of the desk top plate 1. The stopper 116 in the tubular member 115 mounted in the hole 113 of the wheel caster 100 lowers the leg 2 at a position lower than the wheel 112 of the wheel caster at the bottom of the leg 2. It is configured to move up and down between a fixed support position and a position that is freely movable by the wheel of the wheel caster at a position higher than the wheel 112, and according to the unfolding and storage when using the top plate of the desk Bridge The stopper moves together with the lifting rods that move in and out of the site, and the structure is simplified so that the stopper moves between the lowered and raised positions of the wheel caster, thereby reducing manufacturing costs and improving operation reliability. Stability is improved, and there is no effect of a cup failure.

Description

Lecture Desk Legs {A LEG FOR LECTURE DESKS}

The present invention relates to a lecture desk leg, and more particularly, to a lecture desk leg improved to stably fix a desk leg provided with a wheel at the bottom in response to folding of a top plate when storing a lecture desk.

In general, lecture desks are supplied in large quantities in the same model and low manufacturing costs are required. In addition, the space occupied by one desk can be minimized according to the classroom environment, and a structure that is easy to move and store is required.

Accordingly, it is preferable that the desk top plate and the leg are folded for ease of movement and storage of the lecture desk, and in particular, a wheel is provided at the bottom of the leg for convenience during movement.

In the case of a lecture desk having a leg of such a structure, a problem arises that the desk can be easily moved even with a small force during the lecture, and in particular, when the body is unconsciously leaning on the desk, the desk may move and be injured.

In order to improve such a problem, Korean Patent Publication No. 10-0775626 (Registration Date November 05, 2007) is provided in the lower part of the elevating rod having a vertical displacement in conjunction with the rotation of the desk top plate, and the vertical direction during the elevating. A brake having a locking rod interlocked with a stopper coupled to a lower end thereof, a wheel cover provided with a liftable stopper therein, and a wheel cover rotatably provided on the wheel cover, the gear of which one end of the stopper is selectively caught on an inner circumferential surface thereof Disclosed is a lecture desk, which further comprises a wheel of which wheel is formed.

However, in the conventional patent, there is a problem in that the structure for fixing the wheel in conjunction with the folding of the desk top is complicated, which requires a lot of manufacturing cost and a high occurrence rate of failure.

Korean Registered Patent Publication No. 10-0775626 (Registration date November 05, 2007)

SUMMARY OF THE INVENTION An object of the present invention is to provide a lecture desk leg that is improved to securely fix a leg portion provided at a lower end of a wheel in connection with folding of a desk in a more simplified structure in order to improve the problem of the lecture desk according to the prior art. It is.

In order to achieve the above object, the desk desk for teaching according to the present invention is fixed to a desk leg in a use position where the desk top plate is unfolded, and is movable by a wheel of a wheel caster provided at the bottom of the leg in a storage position where the desk top plate is folded. What is claimed is: 1. A teaching desk leg having a lifting rod provided on a leg to move up and down according to a position of a desk top,

The stopper is fixed to the leg in a lower position than the wheel of the wheel caster at the bottom of the leg in the tubular member mounted in the hole of the wheel caster in conjunction with the lifting rod that moves up and down according to the position of the desk top plate. And provided to move up and down between positions that are freely movable by the wheels of the wheel casters in the raised positions.

The stopper is disposed in the lower portion is movable up and down in the tubular member, the upper portion is accommodated in the housing fixed to the lower end of the leg portion on which the wheel caster is mounted, the upper end of the stopper is connected to the interlocking member provided in the housing The interlocking member is interlocked with and in contact with a lifting rod which is lifted and lowered in the leg portion.

The linkage member is elastically supported by a spring in a groove formed in the housing.

In addition, the tubular member is mounted in a hole formed vertically penetrating between two rotatably provided wheels, the lower end of the housing is screwed with the protruding top of the tubular member, the housing is inserted and fixed to the lower end of the leg portion do.

Lecture desk legs according to the present invention, the stopper is moved between the lowered position and the raised position in conjunction with the elevating rod that is raised and lowered in the leg portion in accordance with the spreading and storage when using the top plate of the desk In order to reduce the manufacturing cost, the reliability of the operation is improved, the stability is improved, and there is no effect of residual failure.

1 is a partial cross-sectional view showing that the lecture desk leg provided in the lower end of the leg according to the present invention.
2 is a perspective view of a wheel provided at the bottom of the lecture desk leg of FIG.
3 is a perspective view seen from the back side of FIG.
4 is an exploded perspective view showing the leg fixing structure of FIG.
5 is a longitudinal cross-sectional view of FIG. 2;
6 is a cross-sectional view of the leg portion of the use state in which the wheel of the desk leg is rotatable and movable.
7 is a cross-sectional view of the leg portion of the use state where the desk legs are fixed.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in more detail the present invention.

1 to 4, the upper end of the leg portion 2 is fixed to the support 5 fixed to the bottom of the desk top 1, and is hinged to be rotatable within the support 5, and the top bottom A cam bracket 3 having upper and lower locking grooves 31 and 32 for restraining folding and unfolding positions on one surface thereof is installed on the support 7 fixed to the upper surface, and the upper and lower locking grooves 31 and 32 are provided by the spring 41. The lever 4 is provided with a locking pin member 6 that is selectively released by the user's pressing operation force in the state of being caught in any one of the), protruding toward the lower side of the desk top plate (1) (11) is fixed, the leg portion (2) is provided in the form of a hollow pipe, the lifting rod (5) inside the elastically vertical displacement while the upper end is elastic the lower end of the contact piece (11) It is supposed to support it.

In the use state illustrated in FIG. 1, the desk top plate 1 lifts the pin member 10 provided at the lower end of the contact piece 11 by pressing the bracket 20 having the groove provided at the top of the lifting rod 5. When the rod is lowered and the lever 4 is operated to release the locking pin member 6 from the locking groove 32 of the cam bracket 3, the upper table of the desk is rotated to the contact piece 11 on the bottom thereof. When the pin member 10 provided is released from the upper end of the elevating rod 5 and the bracket 20 is released, the elevating rod 5 is elevated.

A spring 30 is disposed concentrically under the lifting rod 5, and an upper end of the spring 30 is held by a holder 35 fixed to the lifting rod 5, and a lower end of the spring is a leg. By being held by the holder 36 fixed to the part 2, the lifting rod 5 is elastically interlocked in accordance with the displacement of the desk top plate 1 in the unfolded use position and the rotated storage position as shown in FIG. The structure itself is disclosed in Korean Patent Publication No. 10-0775626 mentioned above.

In the present invention, the stopping device provided to move to the elevated position and lowered position than the lower end of the wheel caster 100 by the elevating rod (5) in conjunction with the use position of the desk top plate (1) as described above 110 is provided.

As shown in FIGS. 1 to 4, the stopper device 110 is a tubular member mounted in a hole 113 vertically penetrating between two wheels 112 rotatably provided in the wheel caster 100. A stopper 116 having a lower portion disposed to be movable up and down at 115, accommodating an upper portion of the stopper, and a protruding upper and lower portions of the tubular member 115 are screwed and inserted into a lower end of the leg portion 2. A fixed housing 120, a spring 117 provided concentrically outside of the stopper 116 in a groove 121 formed in the housing, for example screwed onto the top of the stopper 116 and housing 120 The interlocking member 130 is elastically supported by the spring 117 in the groove 121 and moves up and down in contact with the up and down movement of the elevating rod 5 in contact with the lower end of the elevating rod 5. It includes.

The interlocking member 130 has a through hole 132 formed at the bottom of the groove 131 so that the upper end of the stopper 116 is fitted, and the top of the through hole 132 has a reduced radius, so that the stopper 116 The interlocking member is coupled to the top of the stopper by being fastened to the screw formed on the inner diameter side of the stopper 116 by penetrating the bottom of the interlocking member 130 with the bolt 135 in a state of being caught by the step 133 formed in the through hole. .

The operation of the stopping device 110 according to the present invention will be described with reference to FIGS. 5 and 6 according to the use state of spreading the desk top plate for use of the desk, and the storage state of folding the desk top plate for folding the desk. do.

As described with reference to FIG. 1, in the storage state where the top plate is folded and not used, the lifting rod 5 accommodated at the lower end of the leg part 2 is elevated as shown in FIG. 5 by the elastic force of the spring 30, and accordingly As the interlocking member 130 which is in contact with the lower end of the elevating rod 5 also moves to the elevated position by the spring 117, the stopper 116 connected with the interlocking member 130 is also raised to increase the wheel of the wheel caster 100. Positioned higher than (112) the desk is stored freely movable by the wheel of the wheel caster.

In the state of spreading the upper plate, as shown in Figure 6 as the lifting rod 5 is lowered while pressing the interlocking member 130, the spring 117 while compressing the stopper 116 wheel caster 100 Lower than the wheel 112. As a result, the leg 2 of the desk is not supported by the stopper 116 but the wheel, and cannot move freely.

The lecture desk leg according to the present invention can be applied to the leg portion of the desk to be stably supported by the stopper when the desk is in use, and can be used to fix the desk leg to be easily moved by the wheel during movement.

1: desk top 2: foot
5: lifting rod 100: wheel caster
110: stopping device 112: wheel
113: hole 115: tubular member
116: stopper 117: spring
120: housing 121: groove
130: linkage member

Claims (4)

The desk leg 2 is fixed in the use position where the desk top plate 1 is unfolded, and the desk top plate is movable in the storage position in which the desk top plate is flipped by the wheel of the wheel caster 100 provided at the bottom of the leg 2. A lifting rod 5 provided to the leg 2 according to the position of (1) to move up and down, a housing 120 inserted into and fixed to a lower end of the leg 2, and protruding from the housing 120. The upper part is screwed and the lower part is disposed in the tubular member 115 and the lower part which is mounted in the hole 113 of the wheel caster 100 and the upper and lower movable in the tubular member 115 and the upper part is the leg portion (2) The upper end is in contact with the stopper 116 accommodated in the housing 120 fixed to the lower end of the lower portion, the lifting rod 5 descending in the leg portion 2 and the lower end is connected to the stopper 116 to the housing 120 And provided with an interlocking member 130,
The stopper 116 provided through the tubular member 115 is lowered than the wheel 112 of the wheel caster in conjunction with the lifting rod 5 that moves up and down according to the position of the desk top plate 1, and thus the legs 2. In the desk desk for lecture, which is configured to move up and down between a position for holding and holding a) and a position freely movable by the wheel of the wheel caster at a position higher than the wheel 112,
A radial extension 114 formed in the tubular member 115 is seated and supported by the wheel caster 100 at the top of the hole 113 and the outer peripheral surface of the bottom of the tubular member 115 adjacent to the bottom of the wheel caster 100. C-type washer 119 is coupled to the groove 115 'formed in the tubular member 115 is maintained in the hole 113 of the wheel caster 100,
The interlocking member 130 is elastically supported at its lower end by a spring 117 provided on the radially outer side of the upper end of the stopper 116 in the groove 121 formed in the housing 120,
The through hole 132 is formed in the bottom of the groove 131 formed in the interlocking member 130, and the upper portion of the through hole 132 is formed in the stepped hole 132 formed by reducing the radius of the through hole 132. In the state where the upper end of the inserted stopper 116 is settled, the bolt 135 having a head disposed at the bottom of the groove 131 is screwed and coupled to the stopper 116 through the through hole 132. Lecture desk bridge.












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