JPH0715455Y2 - Height adjustment table - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjustment table. More specifically, the present invention relates to a table in which the height of the top plate can be manually adjusted and can be folded. In the present specification, the table is a concept including various table- shaped furniture such as an ironing board as well as a dining table and a desk.

[0002]

2. Description of the Related Art Conventionally, it is known that the lower parts of four legs are detachably screwed to the upper part so that they serve as a table and a table. 2 crossed in an X shape
It is also known that the height of the top plate placed on the upper end of the book is changed by standing or lying the legs of the book.

[0003]

The conventional height changing tables described above all require complicated work for changing the height, have a small range of height selection, and cannot be easily changed once the height is determined. . On the other hand, as a height that can be adjusted relatively easily, for example, it has a pair of legs that are pivotally connected to each other so as to intersect in the vicinity of the center, and the upper end of one leg is hinged to the top plate, It is conceivable that a plurality of engaging portions for engaging the upper ends of the other legs are engraved on the back surface of the top plate. However, since this is a structure in which the other leg and the top plate are separated and simply locked, if the top plate is lifted by mistake, the table may be folded. Moreover, since the other leg is offset from the top plate, there is a problem that it becomes unstable.

It is an object of the present invention to provide a height adjustment table which is safe and whose left and right legs are evenly opened and closed with respect to a top plate and whose height adjustment is extremely simple.

[0005]

Means for Solving the Problems The height adjusting table of the present invention comprises a top plate and a pair of legs that are respectively coupled to lower surfaces of both ends of the top plate to support the top plate. each, upper member at the upper end, is rotatably hinged relative to the top plate, together with you slidably housed independently of each other <br/> the lower upper member, the free lower end of the At the end
A pipe-shaped lower member, and a locking mechanism for locking the sliding between the upper member and the lower member at corresponding positions of at least both legs , and the lower members of the pair of legs. It is characterized in that they are rotatably coupled so as to intersect each other.

In such a height changing table, it is preferable to interpose between the upper member and the lower member a spring for urging the upper member and the lower member in the extending direction.

[0007]

In the table of claim 1, the leg (upper member)
The upper end of is hinged to the top plate, so that both legs are not separated from the top plate. Further, if the upper member and the lower member are fixed by the lock mechanism, the length of the leg does not change. Further, since the lower members are rotatably connected to each other, the legs and the top plate form a solid triangle, and thus the height is stably maintained.

On the other hand, when adjusting the height, first
The other leg is unlocked and the leg is extended or contracted to the desired length, and the upper member and the lower member of the leg are connected again by the locking mechanism. Then about the other leg
Adjust in the same way. In this case, as one leg expands and contracts, the angle between the top plate and that leg and the other leg also becomes unique.
Change in conjunction with each other. Therefore, it is easy to extend the legs one by one.
Adjustment of shrinkage can be performed. Further legs and legs
And the angle of the top plate changes to promote the expansion and contraction of the legs. Therefore, height adjustment work can be performed quickly.

In the table of claim 2, since the spring is urged in the direction in which the leg is extended, when the lock is released to change the height, the weight of the top plate is balanced by the urging force of the spring. sell. Therefore, especially when raising the top plate, the labor can be greatly reduced, and the height adjustment work becomes easy.

Further, if the elastic force of the spring is set to be stronger than supporting the weight of the top plate, the top plate rises only by releasing the lock. Therefore, height adjustment work should be done on both locks.
After releasing, push down the tabletop to the desired height and lock it in that position.

The elastic force of the spring increases when the legs are contracted so as to press the spring, that is, when the top plate is lowered. On the other hand, the force of raising the top plate based on the elastic force of the spring (that is, the force of the leg extending) becomes small when the angle formed by the legs and the top plate is small, that is, when the top plate is lowered. Therefore, there is an advantage that the required adjustment force does not change significantly over the entire height adjustment.

A preferred embodiment of the table of the present invention will now be described with reference to the drawings.

FIG. 1 is a partially cutaway front view showing an embodiment of a table of the present invention, FIG. 2 is a front view showing a folded state of the table of FIG. 1, and FIG. 3 is a table of FIG. Fig. 4 is an enlarged view of a main part of the table, Fig. 4 is a bottom view showing the folded state of the table of Fig. 1, Fig. 5 is an enlarged sectional view of the pin joint around Fig. 4, and Fig. 6 is a locking mechanism according to the present invention. FIG. 7 is a sectional view of the lock mechanism of FIG. 6, and FIG. 8 is a perspective view of the table of FIG.

The table shown in FIG. 1 includes a top plate 1 and the top plate 1.
It is composed of a pair of legs 2 and 3 which are provided on the lower surface of and intersect in an X shape.

The legs 2 and 3 are respectively T-shaped as shown in FIG.
It is divided into a letter-shaped upper member 4 and a lower member 5. Upper member 4
The horizontal rod 6 is a round pipe rotatably attached to the L-shaped metal fitting 7 attached to the lower surface of the top plate 1, and the vertical rod 8 is a square pipe.

The horizontal rod 9 of the lower member 5 is a round pipe having a bottomed cylindrical anti-slip 10 at both ends, and the vertical rod 11 is a square pipe slightly larger than the vertical rod 8 of the upper member 4.
The vertical rod 8 of the upper member 4 is slidably inserted in the vertical rod 11 of the lower member 5 in a nested manner.

Further, the lower members 5 of the legs 2 and 3 are
As shown in FIG. 5, they are rotatably connected by a pin joint 12 penetrating them. Each of the vertical rods 8 and 11 is a square pipe for guiding the rotation when they rotate around the pin joint 12, and moreover, the lower member 5 does not rotate about its own axis. It also serves as a detent for the purpose. A sliding member 13 may be inserted between the square pipes.

In the table of FIG. 1, the compression coil spring 16 is inserted inside the vertical rod 11 of the lower member 5 and always urges the lower end 17 of the vertical rod 8 of the upper member 4 upward. Thus each leg 2, 3 Ri Contact <br/> trying Nobiyo always can balance the weight of such top plate 1. The upper member 4
As shown in FIGS. 3 and 5, the lower end 17 is closed to receive the upper end of the compression coil spring (hereinafter, simply referred to as a spring) 16, and further extends below the pin joint 12. Therefore, the slit 1 is formed on the side wall of the vertical rod 8 of the upper member 4 so as not to interfere with the pin joint 12.
8 is formed.

On the other hand, on the lower surface side near the upper end of the lower member 5,
A lock mechanism 19 is mounted as shown in detail in FIGS. The lock mechanism 19 includes a guide 20 attached to the lower member 5, a lock pin 21 slidably provided in the guide 20, and a lock pin 21 which is always provided with a tip 22.
And a spring 23 for urging the side (arrow A). Further, on the lower surface of the vertical rod 8 of the upper member 4, as shown in FIG. 3, six holes 24 into which the tips 22 of the lock pins 21 can be fitted are formed side by side in the longitudinal direction. That is, in this embodiment, the height adjustment position can be selected in five steps, and the hole 24 at the uppermost end is for ensuring the folded state described later.

In the lock mechanism 19, the lock pin 21 is normally urged in the direction of arrow A by the spring 23 , and the tip 22 thereof is the hole 2 of the lower member (outer square pipe) 5.
5 and the upper member extends through the hole 2 4 (inner square pipe) 4, to lock the upper member 4 and lower member 5 so as not to stretch each other. On the other hand, if the lock pin 21 is pulled in the arrow B direction and the tip 22 is pulled out from the hole 24, the upper member 4 can be slid in the arrow C and D directions.

Next, a procedure for adjusting the height of the table constructed as described above will be described.

In a normal state, the lock pin 21 restrains the sliding of the upper member 4 and the lower member 5. Therefore, the distance L1 between the L-shaped metal fitting 7 and the pin joint 12 does not change, and the triangle formed by them is firmly maintained. Therefore, the height of the table is stable. In the state shown by the solid line in FIGS. 1 and 2, the lock pin 21 is
Engages most engagement with the underside of the hole 24 of the upper member 4 and, therefore L-shaped bracket 7 and the distance L1 between the pin joint 12 becomes longest. Therefore, the lengths L of the legs 2 and 3 themselves are the longest, and the angle θ formed by the legs 2 and 3 and the top plate 1 is also the largest. In this case, since the vertical rod 8 of the upper member 4 is in the most extended state from the vertical rod 11 of the lower member 5, the length of the spring 16 is the longest, and therefore, the top plate 1 is to be further raised. The power is small.

In order to lower the top plate 1 from that state, first, the lock pin 21 is pulled out to release the lock. Even in that case, the top plate 1 does not lower freely due to the biasing force of the spring 16. Further, since the pin joint 12 is in contact with the lower end of the slit 18, the pin joint 12 does not rise any more. In this case, the slit 18 and the pin joint 12 also serve as a stopper.

From that state, the top plate 1 is pushed downward against the urging force of the spring 16 (arrow E in FIG. 8), and the lock pin 21 is fitted into the hole 24 again at a desired height to bring it into the locked state. To do. This will cause the table to once again stabilize firmly at that height. When the top plate 1 is pushed down, the spring 16 contracts, so that the urging force thereof gradually increases. However, on the contrary, the angle θ of the legs 2 and 3 with respect to the top plate 1 becomes gradually smaller, so that the force of pushing up the top plate 1 by the spring 16 (upward component force) becomes smaller. Therefore, the two cancel each other out, and the force required to push down the top plate 1 does not increase linearly and does not change significantly in the entire adjustment area. If desired, the spring 16
It is also possible to make the winding pitch non-uniform and to make the relationship between the compression length of the spring and the biasing force non-linear so as to compensate the component of the spring biasing force when the top plate 1 is lowered.

The procedure for lowering the height of the top plate 1 is as described above, but the procedure for raising it is almost the same. That is, the lock is released while suppressing the rising force of the top plate 1, and the spring 1
The top plate 1 may be lifted by the force of 6 (arrow F in FIG. 8) and locked again at a desired height. Alternatively, it may be set to the highest height and then pushed down again to the required height. The height of the top plate 1 can be adjusted by simultaneously changing the angles of the legs 2 and 3 as described above, so that the horizontal rods at the lower ends of the legs 2 and 3 can be opened or closed evenly (arrow G in FIG. 8, H), the center of the leg does not deviate to one side of the top plate 1. However, for example, the table can be turned upside down and adjusted one leg at a time. If the slip stopper 10 is cylindrical, the legs 2,
3 has the advantage that its anti-slip action is maintained regardless of the opening / closing angle.

When the table is to be folded, the lock is released in the same manner as described above, and the top plate 1 as shown in FIG.
The may be so as to press the or in the lower direction legs 2 and 3 are completely folded. In this case, the biasing force of the spring 16 is the largest, but since the top plate 1 and the legs 2 and 3 are substantially parallel to each other, there is almost no force to lift the top plate 1. It should be locked again in this state.

[0027] In the embodiment, the can and at least table has Tsu rising biasing force of the spring 16 is the strength that can sufficiently support the weight of the top plate 1.
However, the present invention is not limited to such a case.
That is, even if the spring 16 does not have a large urging force and the top plate 1 is lowered when the lock is released,
There is a balance effect that can slow down the descent speed and reduce the force to lift the top plate. Also, even if you do not use any springs, left and right are symmetrical with both legs locked
In, compared with the conventional table, the effect of firmly stable at regular height. Moreover, in order to obtain such an action,
Although the individual parts are movably connected at 5 points,
4 parts can be moved in 4 places when the lock mechanism is released
Since it is a link mechanism that is mechanically connected, expansion and contraction operation is easy
is there. Moreover, when the legs are extended and contracted, the angle between both legs
As it opens and closes to facilitate, height adjustment can be performed quickly.
I can.

In the above-described embodiment, the lock pin 21 biased by the spring 23 in the projecting direction is used as the lock mechanism. It can also be composed of a mounted nut and a screw screwed to the nut. This is the vertical rod 8 of the upper member 4 with the tip of the screw.
(Or a vertical hole in it) can be locked or unlocked. In that case, stepless adjustment is possible by locking with frictional force.

In the above embodiment, both legs 2 and 3 have one vertical rod 8 and 11 , but either one or both may have two or more vertical rods. For example, the same effect can be obtained even if both legs are each formed in a U shape.

Contrary to the case of the above embodiment, the vertical rod 11 of the lower member 5 may be inserted in the vertical rod 8 of the upper member 4 in a nested manner.

[0031]

EFFECTS OF THE INVENTION In the table of claim 1, once the height of the top plate is determined, that state is stably maintained.
Furthermore, it is safe because both the left and right legs open and close symmetrically with respect to the top plate. In addition, in order to obtain such an action,
The parts are movably connected at 5 points, but one lock
In the state that the mechanism is released, 4 parts can be moved in 4 places.
It becomes a linked link mechanism. Therefore, the legs can be expanded and contracted and opened and closed at the same time, and there is an advantage that height adjustment work can be performed quickly and easily.

According to the table of claim 2, the spring supports a part or all of the weight of the top plate to balance the weight, so that the work of adjusting the height of the top plate can be further facilitated.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a table of the present invention.

FIG. 2 is a front view showing a folded state of the table shown in FIG.

FIG. 3 is an enlarged view of a main part of the table shown in FIG.

FIG. 4 is a bottom view showing a folded state of the table of FIG.

5 is an enlarged cross-sectional view around the pin joint in FIG.

FIG. 6 is a perspective view showing an embodiment of a lock mechanism according to the present invention.

7 is a cross-sectional view of the lock mechanism of FIG.

FIG. 8 is a perspective view of the table shown in FIG.

[Explanation of symbols]

 1 top plate 2, 3 legs 4 upper member 5 lower member 7 L-shaped metal fitting 12 pin joint 16 compression coil spring 19 lock mechanism

Claims (2)

[Scope of utility model registration request] 1. A top plate and a pair of legs that are respectively coupled to lower surfaces of both ends of the top plate so as to support the top plate. Each of the pair of legs has an upper end rotated with respect to the top plate. An upper member freely hinged to each other and a lower side of the upper member to each other.
Independently with you slidably accommodated, is it a free end lower
A pipe-shaped lower member and a locking mechanism for locking the sliding between the upper member and the lower member at corresponding positions of at least both legs, and A foldable height adjustment table in which members are rotatably coupled so as to intersect each other. 2. A spring for urging the upper member and the lower member in the extending direction is housed inside each of the legs.
Height adjustment tables have Ru claim 1.