JPS6252564B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for raising and lowering table legs, and more particularly, to a device for raising and lowering table legs that can simultaneously raise and lower all the legs of a table with a single touch.

Various types of tables have been known in the past that have table legs that can be folded when stored, but all of them require too much effort to raise and lower the table legs, and the table legs cannot be folded when stored. The legs are not fixed stably and tend to swing easily, and due to loosening and wear caused by long-term use, they tend to wobble, resulting in inconvenience and discomfort during use.

The present invention solves the above-mentioned difficulties, and its purpose is to easily and quickly raise and lower all the legs of a table at the same time with one touch, and to prevent the legs from swinging easily when the legs are in an upright position. Legs are provided near the four corners of the back surface of the table board, which are stably fixed, so that they can be folded down inward, and a vertical guide rail is laid in the vertical direction approximately at the center of the back surface of the table board. A sliding body with a handle is slidably attached to the
Providing a linkage mechanism including a link device that connects the sliding member with a handle and the leg or an auxiliary member of the leg so that the table leg rises and falls as the sliding member with a handle slides along the vertical guide rail, The open end of the support arm of the support frame is attached to the leg or the auxiliary member of the leg so that the support frame locking part can rotate freely toward the back surface of the table board and is biased in the same direction. A locking plate having a locking slope that contacts the support frame locking portion of the support frame is fixedly provided on the back surface of the table board, and the sliding body with a handle is slid along the vertical guide rail to lower the leg. At this time, in order to push the support frame up from the locking plate and release the contact between the support frame and the locking slope of the locking plate, the slider with the handle is slid and pushed onto the link of the linkage mechanism. To provide a table leg raising/lowering device characterized in that a support release means having a moving pushing body is provided, and a sliding body with a handle is moved to simultaneously raise/tighten or lower all the legs.

Embodiments of the present invention will be described in detail below with reference to the drawings.

A pair of table legs 14a and 14b are integrally connected on both sides of the back side of the table board 10 by connecting bars 12 parallel to the table board 10, which are auxiliary members of the legs. It is attached so that it can be laid down.

Further, a long vertical guide rail 18 is laid in the vertical direction approximately at the center of the back surface of the table board 10, and a sliding body 22 with a handle 20 is attached to the vertical guide rail 18 along the first vertical guide rail 18. It is attached so as to be slidable in the vertical direction in the figure.

As this sliding body 22 is slid along the vertical guide rail 18, the table legs 14a and 14b on both sides of the back surface of the table board 10 stand up or fall toward the inside of the table board 10. The connecting bars 12 connecting each pair of table legs on both sides and the sliding body 22 are connected by a connecting mechanism, and in the embodiment shown in the figure, a substantially U-shaped support frame 26 is engaged with the connecting bars 12 on both sides. Support arms 26b at both ends across the stop 26a,
26c is rotatably supported in the direction of the back surface of the table board 10, and a tension coil spring serving as an attraction means is installed in the horizontal direction between the vicinity of the bent portions on both sides of the support frame 26 and the approximately central portion of the back surface of the table board 10. 28a and 28b are stretched.

Further, when the support frame 26 is rotated and lowered to the back surface of the table board 10, the locking portion 26a of the support frame 26
A short horizontal guide rail 30 is laid in the horizontal direction on the back surface of the table board 10 that comes into contact with the table board 10, and a sliding plate 32 is attached to the horizontal guide rail 30 so as to be slidable along the horizontal guide rail 30. A connecting tool 34 having a Z-shaped cross section and serving as part of a connecting means and a part of support release means is fixed to the surface of the moving plate 32 along the sliding direction, and one pressing end 36 of the connecting tool 34 is attached to a table board. 1
The midway support release slope part 38 is sloped inward on the back side of the table board 10, and the top of this slope is connected to the locking slope 5, which will be described later.
It is set slightly higher than the top of 0.

A sliding plate 32 to which this connector 34 is fixed
and a sliding body 22 on the vertical guide rail 18 at the center of the back surface of the table board 10 are connected by a lever 40, and both ends of the lever 40 are connected to the sliding body 22 and the sliding plate 32, respectively. is pivotably mounted along the back surface of the

Further, on the back side of the table board 10, a holding mechanism 42 is provided to releasably fix and hold each connection bar 12 of the table legs so that the table legs do not swing when the table legs are erected. In the embodiment, the support frame locking portion 26a is connected to the table board 1 by straddling the locking portion 26a of the support frame 26.
Leaf springs 44a and 4 that press toward the back surface of 0
4b are provided laterally on the back surface of the table board 10, and the ends of the leaf springs 44a and 44b on the table leg side are fixed to the back surface of the table board 10.

A locking plate 46 having a substantially rectangular cross section is laid in the lateral direction of the back surface of the table board 10 near the leaf springs 44a and 44b, and a long inclined surface 48 of the locking plate 46 is connected to the table board 10. The short locking slope 50 is inclined inwardly, and is sloped so that the more the support frame locking part 26a locks on the base of the locking slope 50 than the upper part, the stronger the leg is supported. In addition, the slope and the material are set so that the support frame locking part 26a and the locking slope 50 will not be disengaged unless the coupling tool 34, which also serves as a support release means, is operated.
6a and is fixed to the back surface of the table board 10.

To raise a table leg using the table leg raising device configured as described above, hold the handle 20 on the back side of the table board 10 with your hand, and move the sliding body 22 along the vertical guide rail 18 to the center of the table board 10. and move. Then, the sliding plates 32 on both sides of the table board 10 slide outward of the table board 10 along the horizontal guide rails 30 via the levers 40, and as a result, the support frame locking portions 26a move against the sliding plates. One pressing end 36 of the connector 34 fixed on the connector 32 is pushed toward the outside of the table board 10, and the table leg 1 on both sides is pushed through the connector bar 12.
4a and 14b stand up.

The table legs 14a and 14b are the table board 10.
The support frame locking portion 26a stands up against the back surface.
are pressed toward the back surface of the table board by the leaf springs 44a and 44b, and are locked to the locking slope 50 of the locking plate 46 on the back surface of the table board 10, so that the table legs 14a and 14b on both sides are connected to the support frame 26 and the connecting crosspiece. 12 to the back surface of the table board 10 so as not to move.

Since a sufficient play space is secured on the side of the support release slope 38 of the pressing end 36 of the connector 34, the leg 14a or 14b swings, and the locking slope 50
If there is even a slight gap between the support frame locking portion 26a and the support frame locking portion 26a, the biasing force of the leaf spring 44a or 44b acts, and the support frame locking portion 26a is immediately pressed closer to the base on the locking slope 50, and the leg The bottom of the table board 10
The swinging of the leg is automatically prevented by pressing it against the back surface or by pressing the leg against a leg fall prevention member 8 that surrounds the leg base and prevents the leg from falling outward. It goes without saying that other elastic materials such as a hinge with a spring or a coil spring may be used in place of the plate springs 44a and 44b.

Further, in order to fold the table legs to the inside of the table board, grasp the handle 20 and move the sliding body 22 at the center of the back surface of the table board 10 upward or downward along the vertical guide rail 18. Then, the sliding plates 32 on both sides of the table board 10 slide toward the inside of the table board 10 along the horizontal guide rails 30 via the levers 40, and as a result, the support frame locking portions 26a on the sliding plates 32 slide. Connector 3
The plate spring 44a is pushed by the support release slope portion 38 of No. 4.
and 44b, the support frame locking portion 26a
floats upward from the back surface of the table board 10, and from the locking slope 50 on the back surface of the table board 10, the support frame locking portion 2
6a comes off and the support frame 26 is pulled inward of the table board 10 by the tension coil springs 28a and 28b on the back side of the table board 10, and the table legs 14a and 14 are connected to the support frame 26 via the connecting bars 12.
b is laid down and folded toward the inside of the table board 10. In this case, the tension coil springs 28a and 28b are omitted, and as shown in FIG.
A tensioning end 37 may be provided on the opposite side of the support frame 6 as an attraction means for abutting on the inside of the support frame locking part 26a and pulling the support frame 26 in the direction of the vertical guide rail. In this case, it may be necessary to make the vertical guide rail 18 somewhat longer.

As a connection mechanism for connecting the sliding body 22 with a handle 20 that moves along the vertical guide rail 18 and the support frame 26, as shown in FIGS. 4 to 6,
The coil springs 28a and 28b are omitted, and the table board 10
Sliding plate 32 attached to the horizontal guide rail 30 on the back side
The surface of the support frame locking portion 26a is connected via, for example, a U-shaped connecting plate 52 as a connecting means, and the support frame locking portion 26a can freely float above the sliding plate 32. Both ends of the connecting plate 52 are connected via a pair of hinges 54a and 54b having two shafts, and the central part of the connecting plate 52 is fixed to the surface of the sliding plate 32, and the lever 40 is rotated. The table legs 14a and 14b may be connected to the sliding body 22 with a handle, and the sliding body 22 with a handle may be slid to directly raise and lower the table legs 14a and 14b without intervening coil springs.

However, in this case, the support frame 26 is securely locked to the locking slope 50 of the locking plate 46 on the back surface of the table board 10, which is the holding mechanism 42, and the support frame locking portion 26a is held along the locking slope 50. For example, a long hole 55 is bored on the lever side between the sliding plate 32 and the end of the lever 40 so that the lever can move up to the base of the locking slope 50, and the shaft on the sliding plate 32 side is inserted into this long hole 55. It is best to insert them loosely and connect them with some play.

FIGS. 6A, B, C, D, and E are explanatory diagrams showing the action when the legs 14a are laid down. When the legs 14a are upright, the support frame 26 is held by the locking plate 46. Legs 14a and 14b
When laying down the handle 20, move it to the vertical guide rail 1.
8 from the center of the table board outward.
As a result, the sliding body 22 moves and the sliding plate 32 moves to the center of the table board via the lever 40. Since the hinge 54a is a two-axis hinge, when the sliding plate 32 is pulled, one axis 55 of the hinge 54a
a is pulled inward of the table board 10 and the hinge 54a
is opened, and the central piece between the shafts 55a and 55b stands up, pushing up the tip of the support frame 26. And the locking plate 4
When the tip of the support frame 26 rises above the top of the support frame 26, the lock between the support frame 26 and the locking plate 46 is released, and as the lever 40 is further pulled, the support frame 26 moves on the slope of the locking plate 46. The legs 14a and 14b are slid and pulled toward the center of the table board, and the legs 14a and 14b are laid down.

Further, as shown in FIGS. 7 to 9, the horizontal guide rail 30, sliding plate 32, connector 34, etc. are omitted, and a slope protrusion 59 is provided directly on the open end of the lever 40 as a support release means. , and lever 40
The middle part of the connecting bar 12 may be connected to the connecting rod 60. In this connection mechanism, when the leg falls down, the support release means is activated and the support frame locking portion 26a is released from the locking slope 50, and then the connection member 12 is connected to the connection bar 12 so that the attracting means in the direction of the fall of the leg is activated. Connecting bar 12 of rod 60
It is necessary to provide a long hole 55 at the side attachment point (see FIG. 9D). However, if an elastic material such as a coil spring is used as the attracting means, the elongated hole 55 is not necessary, and the lever 40 only has the function of pushing the leg to raise the leg. By releasing the support with the protrusion 59, the legs can be folded down. Note that the support release means is interposed between the back surface of the table board 10 and the support frame locking part 26a, and releases the support frame locking part 26a from the locking slope 50 with a component force P' of the force P that moves the handle 20. It refers to something that is done. Alternatively, the connecting beam 12 between the legs may be omitted and the support frame 26 may be directly attached to the legs.
Furthermore, as shown in FIGS. 10 and 11, four independent legs may be hinged so as to undulate toward the approximate center of the back surface of the table board 10. In this case, the support frame locking portion 26a
It is effective to rotatably pivot the support arms 26b, 26c at both ends.

Although the support frame 26 has been described as having a substantially U-shape, it is not necessarily limited to this shape, but may be composed of both support arms 26b, 26c that support the legs and a locking portion 26a that locks onto the table board 10 side. Needless to say, any shape may be used, and any auxiliary member may be interposed between the legs 14a, 14b and the support frame 26. The term "auxiliary member" as used herein is a general term for all members interposed between the leg and the support frame and involved in raising and lowering the leg.

Furthermore, the connection mechanism is not limited to the method described above; in short, the connection mechanism is not limited to the above-mentioned method;
lever 4 by using the component force P' of the force P that moves 0.
It is sufficient that the leg is raised and locked through the 0, and that the leg is released and the leg is lowered at the same time. Furthermore, if the length of the support arms 26b, 26c can be finely adjusted and the position of the locking slope 50 can be finely adjusted, this will not only be effective when assembling the leg raising device, but will also be easier to use during use. It is also effective in correcting deviations, etc.

As described above, by using the table leg raising device of the present invention, you can easily and quickly move all the table legs with one touch by simply holding the handle at the center of the back of the table board and sliding the sliding body up and down along the guide rail. It is possible to lie down or stand up. In addition, when the table leg is erected and the holding mechanism swings, the support frame locking part immediately moves to the base of the locking slope and tightens the leg, making it stable so that the leg does not move easily. This prevents the inconvenience and discomfort caused by the table legs swinging while the table is in use. Furthermore, since the moving distance of the handle on the vertical guide rail is set to be larger than the moving distance of the support release means, for example, the sliding distance of the sliding plate 32 on the horizontal guide rail, the handle for raising and lowering the legs is It has the advantage of being easy to use, even for women and children with limited physical strength, as it requires little force to move.

In addition, when transporting the table with the table legs folded, you can easily hang it by grasping the handle.
Also, if you hang the table by grasping the handle, it will hang low on the side of your body, making it easy to transport.Also, if you pull up the table from either side, you can grasp the handle and pull it upwards. It has great benefits such as being able to be hung and moved.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

The drawings show preferred embodiments of the present invention; FIG. 1 is a bottom view of a table according to an embodiment of the present invention with the legs upright, FIG. 2 is a bottom view of the table with the legs laid down, and FIG. Figures A to C are explanatory diagrams showing the state in which the legs are laid down, Figure 3D is an explanatory diagram showing the state in which the tension coil spring is omitted, and Figures 4 and 5 show other embodiments, with the legs raised up. FIGS. 6A to 6E are explanatory diagrams showing the procedure for laying down the legs of the embodiment shown in FIG. Figures 9A to C are explanatory views showing the embodiment shown in Figure 7 with the legs laid down; Figure 9D is an explanatory diagram showing the connected state of the connecting crosspiece and the connecting rod, and Figures 10 and 11 show still other embodiments, showing the bottom of the table with the legs erected and the legs laid down, respectively. It is a diagram. 8... Leg overturning prevention member, 10... Table board, 12
... Connecting crosspiece, 14a, 14b ... Table leg, 16
a, 16b...hinge, 18...vertical guide rail,
20... Handle, 22... Sliding body, 24... Connection mechanism, 26... Support frame, 26a... Locking part, 26
b, 26c...Support arm, 28a, 28b...Tension coil spring, 30...Horizontal guide rail, 32...
Sliding plate, 34... Connector, 36... Pressing end, 3
7...Tension end portion, 38...Support release slope portion, 40
... Lever, 42 ... Holding mechanism, 44a, 44b
...plate spring, 46 ... locking plate, 48 ... inclined surface,
50... Locking slope, 52... Connection plate, 54a, 5
4b... Hinge, 55... Elongated hole, 56... Attracting means, 57... Support release means, 59... Slope protrusion,
60...Connecting rod.

Claims (1)

[Claims] 1. Legs are provided near the four corners of the back surface of the table board so that they can be folded inward, and a vertical guide rail is laid in the vertical direction approximately at the center of the back surface of the table board, and a sliding body with a handle is attached to this guide rail. Slidably attached,
Providing a linkage mechanism including a link device that connects the sliding member with a handle and the leg or an auxiliary member of the leg so that the table leg rises and falls as the sliding member with a handle slides along the vertical guide rail, The open end of the support arm of the support frame is attached to the leg or the auxiliary member of the leg so that the support frame locking part can rotate freely toward the back surface of the table board and is biased in the same direction. A locking plate having a locking slope that contacts the support frame locking portion of the support frame is fixedly provided on the back surface of the table board, and the sliding body with a handle is slid along the vertical guide rail to lower the leg. At this time, in order to push the support frame up from the locking plate and release the contact between the support frame and the locking slope of the locking plate, the slider with the handle is slid and pushed onto the link of the linkage mechanism. 1. A device for raising and lowering table legs, characterized in that a support release means having a pushing body that is moved is provided, and a sliding body with a handle is moved to simultaneously tighten the raising legs or lower the legs of all the legs.