JPH119345A - Device for elevating/lowering top plate of furniture or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the top plate elevating/lowering device of a wagon, by which a mechanism part is not exposed outsides with simple configuration and also a top plate is not elevated/lowered with inclination. SOLUTION: A pair of left and right hollow elevating/lowering rods 5 for supporting the top plate 1 are inserted to vertical direction recessed grooves provided on the opposing inner surfaces of both left and right side plates so as to be freely slidable in a vertical direction and a restraining rod 17 which is internally mounted on the elevating/lowering rod 5 and is provided with tooth-shaped restraining step parts 17a being successive in the vertical direction is pivotally fixed to the guide part of a side plate by a pin 16 penetrating a long guide hole 10 which is piecedly provided in the elevating/lowering rod 5 so as to be extended in the vertical direction. Then, a lock member 14 which is elastically engaged with the restraining step part 17a of the restraining rod 17 is made to be movable against an elasticity by an operation lever 11 arranged in the upper part of the elevating/lowering rod 5 in a separating direction from the restraining step part 17a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for raising and lowering a top plate such as a side table or furniture such as a wagon.

[0002]

2. Description of the Related Art In a learning desk as shown in FIG.
A mouse for operating a personal computer placed on, for example, a desk (B) is placed on the top plate of the movable wagon (A). Thus, the top plate can be raised and lowered to a height at which a person sitting on the chair (C) can easily operate the mouse.

[0003]

In such a conventional apparatus for elevating and lowering the top plate, the elevating mechanism is exposed to the outside,
The structure is complicated, and there has been a problem that the top plate cannot be moved up and down horizontally unless the lock members of the right and left elevating rods supporting the top plate are simultaneously released with both hands.

In view of the above-mentioned conventional problems, the present invention has a simple structure, and furthermore, a mechanism is accommodated in a hollow elevating rod, which is not exposed to the outside, and the top plate is inclined up and down. It is an object of the present invention to provide a wagon top plate elevating device which is prevented from being caused.

[0005]

According to the present invention, the above-mentioned problem is solved as follows. (1) A pair of left and right hollow elevating rods that support the top plate at the top are slidably inserted in the up and down grooves provided in the up and down inner surfaces of the left and right side plates of the furniture body facing each other. A guide portion of the side plate is provided by a pin which is provided inside the elevating rod and has a sawtooth-shaped engaging step portion which is continuous in the vertical direction, and which is penetrated by a vertically extending guide hole formed in the elevating rod. The lock member pivotally attached to the lock rod and elastically engaged with the lock step of the lock rod is elastically moved in a direction in which the lock member is detached from the lock step by an operation lever disposed above the elevating rod. It is possible to move against it.

(2) In the above item (1), the locking rod provided inside the hollow elevating rod is vertically moved so that the horizontal locking surface and the inclined surface extending below the horizontal locking surface form a saw-tooth shape. It is provided with a locking step continuously formed in the direction.

(3) In the above item (2), the locking member is provided with a locking portion which is complementary to one of the horizontal locking surface and the inclined surface of the locking step portion.

(4) In any one of the above items (1) to (3), the operation levers provided on the left and right elevating rods are connected to each other by the connecting rods so that the left and right lock members can be simultaneously moved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, the left and right side plates 3 of a wagon (A) according to an embodiment of the present invention have concave grooves ( 3a) is formed. A guide member (4) is mounted in the groove (3a), and the guide member
The lifting rod (5) is held by (4).

The upper ends of a pair of right and left lifting rods (5) (5)
It is connected by a connecting rod (2), and a top mounting plate (6)
, A top plate (2) is attached.

As shown in FIGS. 3 and 4, the lifting rod (5)
Consists of a hollow member (8) such as a steel pipe with a rectangular cross section,
At its front and rear ends, a sliding member (9) made of a hard synthetic resin material is attached.

On the other hand, as shown in FIGS. 8 and 9, the guide member (4) has a pair of vertically extending guide rails (18) (18) having a shape complementary to the outer shape of the slide member (9). 18) are connected at the upper and lower ends by connecting mounting members (19) and (20), the rail (18) is fitted into the concave groove (3a), and the inside of the side plate (3) is inserted by the wood screw (7). Mounted on the side. As is well shown in FIG. 9, the lifting rod (5) has its sliding member.
(9) is guided by the rail portion (18a), and can slide vertically.

As shown in FIG. 5, the hollow member of the lifting rod (5)
In the interior of (8), there is provided a locking step portion (17a) in which a horizontal locking surface and an inclined surface extending below the horizontal locking surface are formed in the vertical direction so as to form a sawtooth shape. The stop rod (17) was attached to the side plate (3) of the furniture body by penetrating the guide slot (10) formed in the inner side surface of the hollow member (8) by the pin (16) at the lower end thereof. Bolt holes in the connecting attachment member (19) below the guide part (4)
It is pivoted to (21).

The locking rod (17) is arranged so that its locking step (17a) is on the inside and the back of the inner wall of the hollow member (8). The locking step (17a) has its horizontal locking surface,
Lock member (14) complementary to the inclined surface connected to this (14)
(See FIG. 7) is pivotally connected between the inner side walls of the hollow member (8) by a shaft (14a).

The lock member (14) is elastically urged by a spring (15) so as to engage with the locking step (17a) of the locking rod (17).

As shown in FIGS. 5 and 6, the lock member (1
4) is the operating rod attached to the lever arm (14b).
By (13), it is connected to the unlocking operation lever (11) pivotally attached to the upper end of the elevating rod (5).

The operating lever (11) is moved by a connecting shaft (12).
The lifting rod (5), that is, the hollow member (8) is pivotally connected to the connecting shaft (1).
2) connects the operating levers (11) of the left and right lifting rods (5) as shown in FIG.

Next, referring to FIG. 10 and FIG.
The raising / lowering operation of (1), that is, the raising / lowering operation of the raising / lowering rod (5) will be described. First, from the upper limit position where the pin (16) reaches the lower end of the guide slot (10) of the lifting rod (5) shown in FIG.
(11) is pulled up, the lock member (14) is rotated clockwise against the elastic force of the spring (15), and the lock member (14) is locked by the locking step of the locking rod (17). Release from engagement with (17a).

Then, the top plate (1), the lower surface of which is indicated by the reference numeral (22), is gently lowered by supporting it with the hand, and the elevating rod (5)
That is, the top plate (1) can be lowered to a free height as long as the guide slot (10) allows. If the hand is released from the operation lever (11) at any desired height, the locking member ( 14) engages with the nearest locking step (17a) and is locked at that height.

FIG. 10 shows a state in which it is locked at the minimum height. In FIG. 10, reference numeral (23) indicates a wagon (A).
Shows the upper end of.

To raise the top plate (1), simply apply a force to the lower surface of the top plate (2) and lift it.
Even without operating the operation lever (11), the slope of the locking step (17a) of the locking rod (17) slides up against the force of the spring (15) and moves up and down one step at a time. (5) rises.

[0022]

According to the present invention, there is provided a top plate elevating device which can perform a reliable elevating operation with a simple mechanism, and furthermore, this mechanism part is completely housed inside the elevating rod and exposed to the outside. In addition, the appearance is good, and there is no risk of failure of the mechanism due to the external environment.

According to the second aspect of the present invention, the locking rod provided inside the hollow lifting rod is formed such that the horizontal locking surface and the inclined surface connected below the horizontal locking surface form a saw-tooth shape. If it is provided with a locking step continuously formed in the vertical direction, it can be moved to an arbitrary ascending position simply by lifting the top plate, and it can be lowered to a desired height by operating the operation lever Can be.

According to a third aspect of the present invention, when the locking member has a locking portion that is complementary to one of the horizontal locking surface and the inclined surface of the locking step portion, The lifting rod can be locked by securely engaging with the portion.

According to a fourth aspect of the present invention, when the operation levers provided on the left and right elevating rods are connected to each other by a connecting rod so that the left and right lock members can be simultaneously operated, one of the operation levers is provided. By simply operating, the locking of the right and left lifting bars can be released, and the top plate can always be lowered in a horizontal posture.

[Brief description of the drawings]

FIG. 1 is a perspective view of an entire learning desk to which the present invention is applied.

FIG. 2 is a partially cutaway perspective view showing a wagon to which the present invention is applied.

FIG. 3 is a perspective view of the left and right elevating rods and their connecting rods shown in FIG. 2;

FIG. 4 is a transverse sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is an enlarged vertical sectional view of a right and left elevating rod in FIG. 2;

FIG. 6 is an enlarged perspective view of an upper end portion of a left lifting rod.

FIG. 7 is an enlarged perspective view of a lock member housed inside a lifting rod.

FIG. 8 is an enlarged perspective view of a guide portion shown in FIG.

FIG. 9 is an enlarged cross-sectional view of a guide portion and a lifting rod accommodated in a lateral groove of a side plate.

FIG. 10 is an enlarged vertical cross-sectional view of a lifting rod at a lower limit position.

FIG. 11 is an enlarged vertical cross-sectional view of a lifting rod at an upper limit height position.

[Explanation of symbols]

 (A) Wagon (B) Desk (C) Chair (1) Top plate (2) Connecting rod (3) Side plate (4) Guide member (5) Lifting rod (6) Mounting plate (7) Wood screw (8) Hollow member (9) Sliding member (10) Guide slot (11) Operating lever (12) Connecting shaft (13) Operating rod (14) Lock member (14a) Shaft (14b) Lever arm (15) Spring (16) Pin ( 17) Locking rod (17a) Locking step (18) Guide rail (19) (20) Connection mounting member (21) Bolt hole

Claims (4)

[Claims] 1. A pair of left and right hollow elevating rods for supporting a top plate on an upper part are slidable in up and down directions in up and down grooves formed on opposed inner side surfaces of left and right side plates of the furniture body. Inset,
A guide portion of the side plate is provided by a pin which is provided inside the elevating rod and has a sawtooth-shaped engaging step portion which is continuous in the vertical direction, and which is penetrated by a vertically extending guide hole formed in the elevating rod. The lock member pivotally attached to the lock rod and elastically engaged with the lock step of the lock rod is elastically moved in a direction in which the lock member is detached from the lock step by an operation lever disposed above the elevating rod. A top plate elevating device for furniture or the like, characterized in that it can be moved in opposition. 2. A locking rod provided inside a hollow lifting rod,
2. The top plate elevating device for furniture or the like according to claim 1, further comprising a locking step portion formed by forming a horizontal locking surface and an inclined surface connected to a lower side thereof in a vertical direction so as to form a sawtooth shape. 3. The top plate elevating device for furniture or the like according to claim 2, wherein the locking member has a locking portion that is complementary to one of the horizontal locking surface and the inclined surface of the locking step portion. . 4. The top plate for furniture or the like according to claim 1, wherein the operation levers provided on the left and right elevating bars are connected to each other by connecting bars so that the right and left locking members can be simultaneously moved and operated. lift device.