JPH0237377Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a study desk, a drafting desk, an OA desk, various tables, etc., whose top plates are attached to the legs so that they can be adjusted vertically. The present invention relates to the structure of a device that can be raised and lowered while keeping the top board balanced so that it does not tilt to the left or right.

[Conventional technology]

In order to prevent the table top from tilting to the left and right with respect to the legs when adjusting the table top so that it can move up and down, the prior art Japanese Utility Model Publication No. 1981-810 discloses that Both the left and right columns projecting downward are fitted into the left and right legs so as to be movable up and down, and 3 pieces 1 are inserted into the upper and lower parts of each of the left and right columns.
A structure is disclosed in which a pair of left and right guide wheels are provided, two flexible winding bodies are wound around these guide wheels in a so-called endless manner, and a part of the winding bodies is fixed to the legs. There is.

[Problem that the invention attempts to solve]

In this way, when the guide wheels are all installed in vertically movable struts, and in order to fix a part of the wrapping body wrapped around these to the leg body, it is necessary to first attach the wrapping body across all of the guide wheels. After wrapping it, it is necessary to insert both struts into both legs, and then fix the wrapping body to the legs.

Until this fixation, the wrapping body is in a loose state with respect to each guide wheel, so it is easy for the wrapping body to come off from each guide wheel, and since there are many guide wheels,
There was a problem that assembly work was difficult.

[Means for solving problems]

Therefore, in the present invention, the upper ends of a pair of left and right legs of a desk, etc. are connected by a horizontal member, and pillars with a hollow cross section are provided on both the left and right legs, respectively, and protrude downward from both the left and right sides of the lower surface of the top plate of the desk, etc. Each of the pillars has a vertical groove that communicates vertically with the inner surface of each leg, and a lower guide wheel is provided at the lower end of both the left and right pillars, while the horizontal A pair of left and right upper guide wheels is provided on each of the left and right sides of the member, and a cable with one end fixed at an appropriate position on each of the pillars is wound around the lower guide wheels of the pillar, and then attached to the outer surface of the vertical groove. The cables are arranged along each other, are wound around both the left and right upper guide wheels, and the other end of the cable is latched to the upper part of the outer surface of the longitudinally grooved groove of the other support.

[Action and effect]

Therefore, as the left and right struts move up and down relative to the left and right legs, the vertical distance between the lower guide wheel at the lower end of one strut and the upper guide wheel at the upper horizontal member expands and contracts by the same amount as that of the other strut. By expanding and contracting the vertical distance between the fixed part of the other end of the cable on the column and the upper guide wheel on the horizontal member, both the left and right columns can be raised and lowered evenly from side to side in a well-balanced manner via the cable wrapped around these guide wheels. , the top plate above it will not tilt to the left or right.

In the present invention, one end of one cable is fixed at an appropriate position such as the upper part of the hollow inside of the right column, and after being wrapped around the lower guide wheel at the lower end of the column, the cable is folded upward. The part of the cable is extended upward along the outer surface of the vertical groove of the right support column, and the midway part of the cable is wrapped around a pair of left and right guide wheels provided on the horizontal member connecting the upper ends of the left and right legs. The other end of the cable is removably locked to the upper part of the column on the outer surface of the vertical groove on the left column, while the other cable starts from the left column and ends at the right column, contrary to the above. As mentioned above, they are arranged symmetrically, so even when the left and right struts are inserted into the bodies of both legs, each cable can be adjusted to a tensioned state at the fixed portion at the upper position of the strut.

Further, since most of the cables are arranged along the outer surface of the longitudinally elongated groove and the lateral members on the outside of the hollow support column, the wiring work for the cables is extremely simple. especially,
Since the locking portion at the other end of each cable is located above the outer surface of each strut, attachment and detachment of the cable becomes easy. If one end of the cable is fixed at a position above the strut, the tension can be adjusted more easily.

Furthermore, since each cable in the present invention is not wound endlessly as in the prior art, the required length of the cable can be shortened.

〔Example〕

Next, an example in which the present invention is applied to a study desk will be described. Reference numeral 1 indicates a top plate, and 2 and 2' indicate a top plate 1.
These are a pair of left and right pillars with a hollow rectangular cross section that protrude downward from both the left and right sides of the lower surface. Both left and right columns 2,
A pair of left and right legs 3 into which 2' is vertically movable;
3' are connected near their upper portions by a horizontal member 4 having an upwardly U-shaped cross section. The upper surface of this horizontal member 4 can be removably covered with a plate-shaped lid 7. Additionally, a sleeve drawer cabinet 5 is provided integrally or separately between the legs 3 and 3' on both the left and right sides, and a book stand 6 can be detachably installed on the top surface of the top plate 1. It is something.

Both leg bodies 3, 3' can be moved without wobbling through conventionally known guide rollers provided on both the left and right columns 2, 2'.
Side plates 9 are slidably abutted on the inner surfaces of the supports 2, 2', and have longitudinal grooves 8, 8 formed on the opposing sides of the support columns 2, 2' to communicate with the left and right opening ends of the horizontal member 4. to be fixed. Therefore, this vertical groove 8
A vertically communicating gap is created between this and the inner surface of the leg body 3.

Reference numeral 10 indicates a balance support device that balances gravity so that the top plate 1 can be moved up and down with a light force.
The balance support device 10 includes a rope 11 whose one end is fixed to the lower end of one of the pillars 2 or 2', and which is disposed upward along the outer surface of the longitudinal groove 8; A guide wheel 12 guided into the horizontal member 4, a lever 13 pivotally mounted within the horizontal member 4 so as to be freely rotatable approximately horizontally, and a telescopic gas spring 14 mounted between the lever 13 and the horizontal member 4. It consists of a pulley group 15 that reduces the load transmitted to the lever 13 by wrapping and guiding the rope 11, and the balance support device 10 can balance or reduce the load of the top plate 1 etc. that moves up and down. Therefore, it can be raised with light force,
It can be lowered. In addition, the pillar 2 and the leg 3
A conventionally known locking device (not shown) that allows the column to be fixed at any height is provided between the
is provided.

The left and right balance lifting device of the present invention includes a pair of left and right cables 17, 18 such as twisted wires or ropes, and lower guide wheels 19a, 19 provided at the lower end of each support.
b. Consists of a pair of left and right upper guide wheels 21a, 21b and upper guide wheels 21c, 21d rotatably supported on a horizontal shaft 20 on the legs 3, 3' near both left and right opening ends in the horizontal member 4. .

Then, one end of one cable 17 is fixed to a vertically adjustable engagement part 22 such as a female screw provided at the upper part of the right column 2', and the cable 17 is hung down to a lower guide wheel at the lower end of the column. After wrapping it around 19a, it is turned upward and placed along the outer surface of the elongated groove 8, which forms the gap between the outer surface of the support 2' and the inner surface of the leg 3'. The cable 17 is wrapped around the upper side of the upper guide wheel 21c facing the outer surface of the vertical groove 8, and then wrapped around the lower side of the upper guide wheel 21a at the end of the left leg 3. Vertical groove 8 in the inserted left column 2
The cable 17 extends upward along the outer surface of the groove 8, and the other end of the cable 17 is fitted into and locked in a locking portion 23 provided at an upper position on the outer surface of the vertically elongated groove 8.

At this time, the locking portion 23 is
As shown in the figure, it has a slot shape with one end open to a locking plate 24 that straddles the vertical groove 8 substantially horizontally,
By forming a communication hole 25 in the longitudinally elongated groove 8 on the back side of the locking plate 24, the cable 1 is locked in the slot-like locking portion 23 of the locking plate 24.
The large-diameter stopper 16 at the other end of the support 7 does not interfere with the inner surface of the leg 3 when the support 2 moves up and down.

The other cable 18 is disposed symmetrically with the cable 17, and one end of the cable 18 is connected to the vertically adjustable engagement portion 2 at the upper position within the left support 2.
2, and after hanging the cable 18 and wrapping it around the lower guide wheel 19b at the lower end of the column, the cable 18 is turned upward to form a vertical groove 8 that forms a gap between the outer surface of the column 2 and the inner surface of the leg 3. along the outer surface of the The cable 18 is wrapped around the upper side of the upper guide wheel 21b facing the outer surface of the vertical groove 8, and then wrapped around the lower side of the upper guide wheel 21d at the end of the right leg 3'. A locking part extends upward along the outer surface of the vertically long groove 8 in the right support 2' fitted into the right strut 2', and a locking part 16 at the other end of the cable 18 is provided at an upper position on the outer surface of the vertically groove 8. 23 to be inserted and locked. In this case, it is better if each stopper 16 is equipped with an adjuster that can adjust the tension of the cable.

According to this configuration, when the locking device (not shown) is released and the top plate 1 is pulled upward, the rope 11 connected to the lower end of the support column 2 is connected to the pulley group 15.
The lever 13 is horizontally rotated via the lever 13, which is balanced with the elastic force of the gas spring 14 and can be raised with a light force.

At the same time, the vertical distance between the lower guide wheels 19a, 19b at the lower ends of both the left and right columns 2, 2' and the upper guide wheels 21c, 21b at the upper part of the legs 3, 3 is shortened, and the cables 17, 18 in that part are relaxed. I try, but
The vertical distance between the locking parts 23, 23, to which the other ends of these cables 17, 18 are locked, and the upper guide wheels 21a, 21d becomes longer, which causes the cables 17, 18 to be pulled. Therefore, both the left and right cables 17 and 18 move with their tensions balanced on both the left and right sides. Therefore, both the left and right columns 2, 2' can be raised and lowered by the same amount, and the top plate 1 above them can also be smoothly moved up and down without tilting to the left or right.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of the main part of FIG. 2, FIG. 2 is a cross-sectional view of the desk seen from the front, and FIG. 3 is a cross-sectional view taken along the - line of FIG. 2. , Figure 4 is a sectional view with the left and right columns raised, Figure 5
1, FIG. 6 is a sectional view taken along the - line in FIG. 1, and FIG. 7 is a sectional view taken along the - line in FIG. 6. 1... Top plate, 2, 2'... Support, 3, 3'... Legs, 4... Horizontal member, 7... Lid, 8, 8... Vertical groove, 10... Balance support device , 17, 18...
... Cables, 19a, 19b ... Lower guide wheel, 21
a, 21c, 21b, 21d...upper guide wheel, 2
2, 22...Engaging part, 23, 23...Locking part, 2
4... Locking plate, 25... Communication hole.

Claims (1)

[Scope of utility model registration request] The upper ends of a pair of left and right legs of a desk, etc. are connected by a horizontal member, and pillars with a hollow cross section that protrude downward on both sides of the lower surface of the top plate of the desk, etc. are fitted into the left and right legs so as to be vertically movable. , in each of the columns, a vertical groove communicating vertically with the inner surface of each leg body is formed, and a lower guide wheel is provided at the lower end of both the left and right columns, while a lower guide wheel is provided on each of the left and right sides of the horizontal member. is provided with a pair of upper guide wheels on the left and right, and a cable with one end fixed at an appropriate position on each of the columns is wrapped around the lower guide wheels of the column, and then arranged along the outer surface of the longitudinal groove. death,
A left-right balance lifting device for a top plate of a desk, etc., which is wound around both the left and right upper guide wheels, and the other end of the cable is locked to the upper part of the outer surface of the longitudinally grooved groove of the other support.