JPS59155209A - Apparatus for erecting table legs - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a table leg raising and lowering device, and more particularly to a table leg raising and lowering device that can simultaneously raise or lower the entire circumference 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, causing inconvenience and discomfort during use.

The present invention solves the above-mentioned difficulties, and its purpose is to raise and lower the entire circumference of the table easily and quickly with one touch, and to prevent the legs from easily swinging when the table legs are erected. 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 sliding body with a handle, and the sliding body with a handle and the leg or the auxiliary member of the leg are attached so that the table leg rises and falls as the sliding body with a handle slides along the vertical guide rail. connected by a connecting mechanism, and the free 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 freely rotate in the direction of the back surface of the table board and is biased in the same direction. Then, the support frame locking portion is releasably brought into contact with a locking slope of a locking plate provided on the back surface of the table face plate in an upright state, and the support frame is locked between the support frame and the back surface of the table board. A support release means for releasing the contact between the locking plate and the locking slope of the locking plate is provided in association with the sliding body with a handle, and the sliding body with a handle is moved to tighten the raising leg or lowering the leg at the same time around the entire circumference. An object of the present invention is to provide a table leg lifting device characterized by the following.

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 attached to both sides of the back surface of the table board 10 by hinges 16a and 16, which are connected together by connecting bars 12 parallel to the table board 10, which are auxiliary members of the legs.
It is attached to the table board 10 so that it can be folded down towards the inside of the table board 10 at b.

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 this vertical guide rail 18
A sliding body 22 with a handle 20 is attached so as to be slidable in the vertical direction in FIG. 1 along the vertical guide rail 18.

As this sliding body 22 is slid along the vertical guide rail 18, the table legs 1 on both sides of the back surface 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 24 so that the legs 4a and 14b stand up or fall down toward the inside of the table board 10,
In the embodiment shown in the figure, the locking portions 26a of the substantially U-shaped support frame 26 are sandwiched between the connecting bars 12 on both sides, and the support arms 26 at both ends are
b.

26c is rotatably supported toward the back surface of the table board 10, and extends horizontally 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. Coil springs 28a and 28b are tensioned.

Further, a short horizontal guide rail 30 is laid in the lateral direction on the back surface of the table board 10 that the locking portion 26a of the support frame 26 comes into contact with when the support frame 26 is rotated and lowered to the back surface of the table board 10. 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 a part of the supporting release means 57 is fixed to the surface of the table board 10 along the sliding direction. It stands up facing upwards on the inside of the support release slope part 3.
8 is inclined inward on the back side of the table board 10, and the top of this slope is set slightly higher than the top of a locking slope 50, which will be described later.

The sliding plate 32 to which the connector 34 is fixed and the 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 on the vertical guide rail 18 at the center of the back surface of the table board 10. A lever 40 is pivotally attached to the slide plate 22 and the sliding plate 32 so as to be rotatable along the back surface of the table plate 10.

Further, on the back surface 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, a leaf spring 4 straddles the locking portion 26a of the support frame 26 and presses the support frame locking portion 26a toward the back surface of the table board 10.
4a and 44b 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.

The table board 10 near the leaf springs 44a and 44b
A locking plate 46 in the shape of a cross-sectional path is laid in the lateral direction of the back surface, and a long inclined surface 48 of the locking plate 46 slopes toward the inside of the table board 10. The slope 50 is sloped so that the more the support frame locking portion 26a locks on the base of the locking slope 50, the more strongly the leg is supported, and the coupling 34, which also serves as the support release means 57, is not operated. The inclination and material are set so that the support frame locking portion 26a and the locking slope 50 will not be disengaged if the support frame locking portion 26a does not come off.

To raise a table leg using the table leg raising device with the above configuration, 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 the support frame locking portions 2 are moved along the horizontal guide rails 30.
6a is pushed by the inner surface of one pressing end 36 of the connector 34 fixed on the sliding plate 32 and pushed outward of the table board 10, and the table legs 14a on both sides are pushed through the connecting bar 12. and 14b stand up.

Then, with the table legs 14a and 14b standing up against the back surface of the table board 10, the support frame locking portion 26a is held against the plate spring 44a.
and 44b toward the back surface of the table board, 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 pushed through the support frame 26 and the connecting crosspiece 12. It is fixed to the back surface of the table board 10 so as not to move.

And the support releasing slope portion 38 of the pressing end 36 of the connector 34
Since a sufficient play space is secured on the side, if the leg 148 or 14b swings and even the slightest gap is created between the locking slope 50 and the support frame locking portion 26a, the urging force of the leaf spring 44a or 44b will be reduced. works, and the support frame locking portion 26a immediately engages the locking slope 5.
0, and press the bottom of the leg against the back surface of the table board 10, or press the leg against the circumferential outside prevention member 8 that surrounds the leg base and prevents the leg from falling to the outside. Automatically prevents rocking. Note that the plate spring 44a
, 44b, it goes without saying that other elastic materials such as a hinge with a spring or a coil spring may be used.

Further, in order to fold the table legs toward the table board side, 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 rails. 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 move on the sliding plates 32. The plate spring 44a is pushed by the support release slope portion 38 of the coupling tool 34.
44b, the support frame locking portion 26a floats upward from the back surface of the table board 10, and the support frame locking portion 26a comes off from the locking slope 50 on the back surface of the table board 10. 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 connecting bar 1
The table legs 14a and 14b, which are connected to the support frame 26 via 2, are collapsed and folded toward the inside of the table board IO. In this case, the tension coil springs 28a and 28b are omitted, and as shown in FIG.
A pulling end portion 37 may be provided as a pulling means 56 for pulling in the direction of the vertical guide rail. In this case, the vertical guide rail 18
It may be necessary to set it somewhat longer.

As shown in FIGS. 4 to 6, a coil spring 28a is used as a connecting mechanism 24 that connects the sliding body 22 with a handle 20 that moves along the vertical guide rail 18 and the support frame 26.
, 28b is omitted, and the horizontal guide rail 3 on the back side of the table board 10 is
The surface of the sliding plate 32 attached to 0 and the support frame locking portion 26a are connected via, for example, a U-shaped connecting plate 52 as a connecting means, and the support frame locking portion 26a is slidable. Both ends of the connecting plate 52 are connected via a pair of hinges 54a and 54b so that the plate 32 can float upward, and the central part of the connecting plate 52 is fixed to the surface of the sliding plate 32, and a handle is attached. The table legs 14a, 14b may be configured to be able to be raised and lowered directly by sliding the attached sliding body 22 without intervening coil springs.

However, in this case, the support frame 26 is reliably 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 moved along the locking slope 50.
For example, a long hole 55 is bored between the sliding plate 32 and the end of the lever 40 on the lever side so that the lever can move up to the base of the locking slope 50, and a shaft on the sliding plate 32 side is inserted into this long hole 55. It is best to connect them with some play by inserting them loosely.

In addition, as shown in FIGS. 7 to 9, the horizontal guide rail 3
0. Sliding plate 32. For example, the connecting member 34 and the like can be omitted and the slope protrusion 59 can be used directly on the release end of the lever 40 as a support release means.
Further, the intermediate part of the lever 40 and the connecting bar 12 may be connected by a connecting rod 60. In this connection mechanism, when the leg falls, the supporting and holding release means are activated to release the support frame locking portion 26a from the locking slope 50, and then the puller Vi56 is actuated on the connecting bar 12 in the direction of the fall of the leg. Connecting rod 1 of connecting rod 60 so that
It is necessary to provide a long hole 55 at the attachment point on the second side (
(See Figure 9(D)). However, if an elastic material such as a coil spring is used as the attracting means 56, the elongated hole 55 is not necessary.
The lever 40 only has the function of pushing the leg to raise the leg, and when the leg falls down, the sliding body 22 with a handle is moved and the support is released by the slope protrusion 59, thereby realizing the falling leg.

Note that the support release means 57 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 by a component force P' of the force P that moves the handle 20. Indicates what is to be removed. Alternatively, the connecting beam 12 between the legs may be omitted and the support frame 26 may be attached directly to the legs, or four independent legs may be attached to the table board 10 as shown in FIGS. 10 and 11.
It may be hinged so as to undulate toward the approximate center of the back surface. In this case, the support arms 26b at both ends are attached to the support frame locking portion 26a,
It is effective if 26C is pivotably mounted.

Although the support frame 26 has been described as having a substantially U-shape, it is not necessarily limited to this shape.
It may have any shape as long as it consists of a locking portion 26a that locks on the table board 10 side, and any auxiliary member may be interposed between the legs 14a, 14b and the support frame 26. Needless to say. 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 24 is not limited to the method described above, and in short, the leg is raised via the lever 40'lr using the component force P° of the force P that moves the handle 20 along the vertical guide rail. It is sufficient as long as it locks together with the lock and tilts the legs at the same time as releasing the lock.Furthermore, the length of the support arms 26b, 26c can be finely adjusted, and the position of the locking slope 5o can be finely adjusted. (Also, it is not only effective when assembling the leg raising/lowering device, but also effective in correcting errors during use.

As described above, by using the table leg raising/lowering device of the present invention, all the table legs can be easily and quickly moved 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. Further, 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, so that 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, and when you hang it by grasping the handle, the table is suspended low on the side of your body, making it easy to carry. It's easy, and no matter which side of the table you're using, you can just grab the handle and pull it up.
It has great benefits such as being able to hang it up and move it.

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 drawings]

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, and Figure 3 (D)
4 and 5 are explanatory diagrams showing a state in which the tension coil springs are omitted, FIGS. 4 and 5 show other embodiments, and FIG. A
) to E) are explanatory diagrams showing the procedure for laying down the legs of the embodiment shown in FIG. 4, and FIGS. 7 and 8 show still other embodiments, with the legs erected. A bottom view of the table showing a state in which it is laid down, FIG. 9 (A) or C) is an explanatory diagram showing a state in which the legs of the embodiment shown in FIG. 7 are laid down, and FIG. FIGS. 10 and 11 are explanatory diagrams showing the connected state of the connecting rods, and are bottom views of the table showing still other embodiments and showing the legs in an erect state and a laid down state, respectively. 8... Circumferential outer side prevention member, 10... Table board. 12...Connecting crosspiece, 14a, 14b...Table leg, 16a, 16b...Hinge, 18...
Vertical guide rail, 20...handle, 22...
-Sliding body, 24...Connection mechanism, 26...Support frame, 26a--Locking part, 26b, 26
c...Support arm, 28a, 28b...Tension, tension coil spring, 30...Horizontal guide rail, 32.
...Sliding plate, -34...Connector, 36...Press end, 37...Tension end, 38...Support release slope part, 40...Lever. 42... Surface holding mechanism, 44a, 44b... Leaf spring, 46... Locking plate, 48... Inclined surface. 50... Locking slope, 52... Connecting plate. 54a, 54b... hinge, 55-... long hole. 56... Attraction means, 57... Support release means. 59...Slope protrusion, 60...Connecting rod. Patent applicant Shinai Giken Co., Ltd. Representative Kuniko Suyama Figure 10 Figure 10 Figure 11 0

Claims (1)

[Claims] 1. Legs are provided near the four corners of the back of the table board so that they can be folded inward, and a vertical guide rail is installed in the vertical direction at approximately the center of the back of the table board, and a sliding body with a handle is installed on this guide rail. is slidably attached, and the sliding body with a handle and the leg or the auxiliary member of the leg are connected by a connecting mechanism so that the table leg rises and falls as the sliding body with a handle slides along the vertical guide rail. , the free 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 is rotatable toward the back surface of the table board and biased in the same direction; The locking portion is releasably brought into contact with the locking slope of the locking plate provided on the back surface of the table face plate in the raised state, and the support frame locking portion and the locking plate are placed between the support frame and the back surface of the table board. A support release means for releasing the contact with the locking slope is provided in association with the sliding body with a handle, and the sliding body with a handle is moved to tighten the raising leg or lower the leg at the same time around the entire circumference. Raising device for table legs.