JPH10211025A - Foldable desk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a top plate from rapid descending to prevent a desk from damages and a user from injury, by equipping a rotation resistant means to damp the rotation of the top plate in a foldable desk with the top plate pivotally attached to a support column and rotatable between a horizontal use condition and a folded storage condition. SOLUTION: When the top plate of this foldable desk is to be rotated from the vertical folded storage position to the horizontal use position, a damper main body 7 forming an oil room 10 to store a wing part 11 is rotated, centering on a rotation shaft 4 as shown by the arrow mark. At this time, since oil moves through an oil passage 10a from a part of the oil room to the other in a condition that a check valve 12 is closed, the rotation centering on the rotation shaft 4 is damped and performed under imparting rotation resistance to the top plate 1. On the other hand, when the top plate is rotated from the horizontal use condition to the vertical folded storage condition, the damper main body 7 rotates to the wing part 11, but, since the check valve 12 is opened and then the major portion of oil moves by passing through the valve, no rotation resistance is given to quickly rotate the top plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding table having a top plate which is pivotally mounted between a horizontal use state and a substantially vertical folded storage state, and which is pivotally mounted on a column.

[0002]

2. Description of the Related Art In a conventional folding table of this type,
When the top plate rotates from a horizontal state or a vertical state to a different state with respect to the support, gravity acts in any direction, and the top plate descends.

[0003]

Therefore, the user of the folding table has to rotate the top plate to a different state while supporting the lowering of the top plate by gravity by hand.
If the hand is not supported, the tabletop will descend suddenly, and an impact load will be applied to the tabletop, the support, the locking device, etc., and the table will be damaged, There was a risk of being injured when a part of the body was pinched. In addition, when the top board is lowered by gravity, it is necessary to support the weight of the top board by hand, which causes a problem that a burden is imposed on the user.

[0004] In order to solve the above-mentioned problems, the present invention is intended to prevent the top plate from suddenly descending due to gravity without rotating the top plate. The purpose is to provide a table.

[0005]

According to the present invention, the above-mentioned problem is solved as follows. (1) In a folding table having a top plate pivotally mounted on a column so as to be rotatable between a horizontal use state and a substantially vertically folded storage state, the rotation of the top plate around the pivot portion is performed. Rotation resistance means for buffering is provided.

(2) In the above item (1), the rotation resistance means is provided such that the damper body in which oil is sealed is attached to one of the support and the top plate, and the rotation resistance means is provided by the oil of the damper body. Is attached to the other end.

(3) In the above item (2), the rotary shaft is provided with a wing extending in the radial direction, and the damper body has an oil chamber partitioned by the wing except for a narrowed oil flow path. .

(4) In the above item (3), there is provided a means for making the rotation resistance by the rotation resistance means different depending on the rotation direction.

(5) In the above item (4), the means for making the rotation resistance different depending on the rotation direction is a check valve provided on the wing portion.

[0010]

1 to 5 show an embodiment of a folding table according to the present invention. A top plate (1) of the folding table is provided on a stand (2) with casters. The shaft (4) is pivotally mounted on the upper end of the support (3), and can be turned from the substantially vertically folded storage state shown in FIG. 4 to the horizontal use state shown in FIG. 5, or vice versa. In the case of this embodiment, as is apparent from FIG.
As shown in FIG. 4, when the top plate (1) is turned horizontally, gravity acts to gradually turn downward as shown in FIG. Tend to.

According to the present invention, as shown in FIG.
Near the upper end of (3), a shaft hole (6) for fixing the shaft (4)
Are drilled. The shaft hole (6) has, for example, a shape in which the upper and lower sides of a circle are cut in parallel, and a shaft (4) having a cross section of the same shape is relatively non-rotatably mounted.

The shaft (4) serves as a rotating shaft of a cylindrical damper body (7) whose operation will be described in detail with reference to FIGS. 2 and 3, and the damper body (7) is provided with mounting portions on both sides thereof. (7a) is attached to an L-shaped mounting bracket (5) by bolts (8).

The mounting bracket (5) is mounted on the back surface of the top plate (1) by bolts (9).

As shown in FIGS. 2 and 3, the damper main body (7) has a sealed oil chamber that forms a fan shape around the rotation shaft (4).
In this oil chamber (10) filled with hydraulic oil, a wing (11) extending in the radial direction from the rotation shaft (4) has an oil passage ( It is arranged so as to leave 10a) and partitions the oil chamber (10). The damper body (7) having the oil chamber (10) and the rotating shaft (4) having the wings (11) constitute a rotating resistance means.

The wing (11) is provided with a check valve (12),
In the case of this embodiment, the oil flow in the counterclockwise direction shown in FIG. 3 is allowed, but the oil flow therethrough is not allowed in the clockwise direction shown in FIG.

The operation of this embodiment will be described. When the top plate (1) is rotated from the vertical folding storage position shown in FIG. 4 to the horizontal use position shown in FIG. Since the wing (11) is fixed to the column (3) so as not to rotate, the damper body (7) forming the oil chamber (10) for accommodating the wing (11) is As shown by the arrow in FIG.
Rotate around (4).

At this time, while the check valve (12) is closed, the oil flows only through the narrowed oil passage (10a) of the wing (11) partitioning the oil chamber (10). Move from one side of (10) to the other. Therefore, even if the load of the top plate (1) acts,
The rotation about (4) is buffered, and the top plate (1) slowly rotates while being provided with the rotation resistance until the horizontal use state.

When turning from the horizontal use state to the vertical folded storage state, as shown in FIG. 3, the damper body (7) turns with respect to the wing (11). At this time, check valve
(12) is opened, and most of the oil moves therethrough, so that little rotation resistance is given and the top plate (1) can be quickly rotated.

In the above-described embodiment, the top plate is lifted from the horizontal use state to the vertical folded storage state. Conversely, the top plate is lowered from the horizontal use state. Some are folded down to be in a vertically folded and stored state. In this case, since gravity acts when the vertical folding storage state is set, the rotation resistance means acts at this time.

[0020]

According to the present invention, it is possible to prevent the top plate from suddenly descending due to gravity without having to support the hand when rotating the top plate.
It is possible to prevent a part of the user's body from being caught between the parts of the table and to cause an injury, and to reduce a burden on the user when the top plate is rotated by gravity.

According to the second aspect of the present invention, the rotation resistance means is mounted on one of the support and the top plate with a damper body filled with oil therein, and is rotated by the oil of the damper body. If the rotating shaft to which the resistance is applied is configured to be attached to the other, an appropriate cushioning property is given by oil braking.

According to a third aspect of the present invention, the rotary shaft has a wing extending in the radial direction, and the damper body is
If an oil chamber partitioned by the wings is provided while leaving a narrowed oil flow path, compact and effective rotation resistance means around the rotation axis is formed.

According to the fourth aspect of the present invention, if means for varying the rotation resistance by the rotation resistance means according to the rotation direction is provided, the rotation in the direction opposite to the direction in which the rotation is urged by gravity is provided. At the time of movement, the top plate can be moved lightly during rotation.

According to a fifth aspect of the present invention, when the means for varying the rotational resistance according to the rotational direction is a check valve provided on the wing portion, the rotational resistance is applied or not. , Can be automatically switched according to the direction of rotation.

[Brief description of the drawings]

FIG. 1 shows an upper part of a column on one side of a folding table according to an embodiment of the present invention and a rotation resistance means attached thereto.
FIG. 3 is a partial perspective view showing a part of the top plate in a disassembled state.

FIG. 2 is an enlarged vertical cross-sectional view of the assembled turning resistance means, illustrating the turning in the direction in which the turning resistance is applied.

FIG. 3 is an enlarged vertical cross-sectional view of the assembled turning resistance means, illustrating the turning in a direction in which no turning resistance is applied.

FIG. 4 is a side view of an embodiment of the folding table according to the present invention in which the top plate is in a vertically folded storage state.

FIG. 5 is a side view of an embodiment of the folding table according to the present invention in a state where the top plate is used horizontally.

[Explanation of symbols]

 (1) Top plate (2) Footrest (3) Post (4) Rotating shaft (5) Mounting bracket (6) Shaft hole (7) Damper body (7a) Mounting part (8) (9) Bolt (10) Oil chamber (10a) Narrowed oil path (11) Blade (12) Check valve

Claims (5)

[Claims] 1. A folding table having a top plate pivotally mounted on a column so as to be rotatable between a horizontal use state and a substantially vertical folded storage state, wherein the rotation of the top plate around the shaft attachment portion is performed. A folding table provided with rotation resistance means for buffering movement. 2. A rotation resistance means, wherein a damper body in which oil is sealed is attached to one of a support and a top plate, and a rotation shaft to which rotation resistance is given by oil of the damper body is provided. 2. The folding table according to claim 1, wherein the folding table is attached to the other side. 3. A rotary shaft having a wing extending radially, and a damper body having an oil chamber partitioned by the wing except for a narrowed oil flow path. Folding table. 4. A device according to claim 2, further comprising means for varying the rotation resistance by the rotation resistance means depending on the rotation direction.
The folding table as described. 5. The folding table according to claim 4, wherein the means for varying the rotation resistance according to the rotation direction is a check valve provided on the wing.