JP2539983Y2 - Elevating table - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to an elevating table capable of adjusting the height of a table surface by moving the table surface up and down.

[Conventional technology]

For example, in a work table, a cooking table, etc.,
2. Description of the Related Art An elevating table configured to be able to elevate a table surface is known. Such a lifting table is, for example, 4
The table body having the legs (legs) of the book and the table plate having the table surface are formed separately, and the table plate is connected via a telescopic link mechanism in which a pair of link arms are assembled in a substantially X-shape. It is attached to the upper surface of the table body. The table board is moved up and down by the expansion and contraction of the link mechanism, and the height of the table surface with respect to the floor surface or the like is adjusted.

Here, the link mechanism assembled in a substantially X-shape is referred to as a so-called cross-link, and one end of a link arm of the cross-link is pivotally attached to the table plate and the table body, and the other end is a free end. , And is configured to be movable in the guide. The change in the interval between the upper end and the lower end of the cross link due to expansion and contraction is compensated by moving the free end (the other end) of the link arm.

According to the lifting table having such a configuration, the table surface can be appropriately adjusted to a height suitable for the height of the worker, the content of the work, and the like, and the worker can perform the work without forcing the worker to take an excessive posture. Therefore, excessive fatigue of the worker is sufficiently suppressed.

[Problems to be solved by the invention]

By the way, when the table plate is raised, the free end of the link arm moves, and the distance between the upper end and the lower end of the cross link is narrowed, so that the stability of the table plate may be reduced. Therefore, in a known lifting type table, a large crosslink is generally used so that the stability of the table plate can be maintained even when the table plate is raised. However, a large cross link is not preferable because the entire lifting table becomes large and heavy.

The expansion and contraction of the cross link is obtained by moving the free end of the link arm. However, when the free end of the link arm moves, frictional force is generated between the link arm and the guide, so that there is a possibility that smooth expansion and contraction of the cross link may be hindered.

Further, in a known liftable table, since a cross link is interposed between the table body and the table plate, a storage portion for storing the cross link at a position below the table plate is required, for example, in the table body. .
However, since the storage section is usually provided so as to protrude below the table main body, a dead space is formed in the lower space of the table main body, and the lower space cannot be effectively used.

When the table board is raised, cross-links between the table board and the table body are exposed, so that the appearance quality of the liftable table is inevitably deteriorated.

An object of the present invention is to improve the stability of the table surface without increasing the size of the table surface, and to provide a vertically movable table capable of smoothly raising and lowering the table surface.

[Means for Solving the Problems] To achieve this object, according to the present invention, the leg is formed in a telescopic double structure in which the inner leg is slidably housed in the outer leg, A slide device in which the inner rail is slidably incorporated in the outer rail via a rolling element is disposed in the inner leg of the leg. Either the outer rail or the inner rail of the slide device is fixed to the inner leg, and the other is fixed to the outer leg through a cutout of the inner leg.

In addition, a nut is integrally fixed to the rail on the movable side of the table body, out of the outer rail and inner rail of the slide device, and the lead screw supported by the table body can be linked to the driving means. And screwed to the nut.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the lifting table 10 according to the present invention has a leg 12 having a double structure that can be extended and retracted, and a slide device 14 disposed inside an inner leg 18 of the leg. It is configured.

The leg 12 includes, for example, an outer leg 16 and an inner leg slidably housed in the outer leg.
18 and is formed. And leg 12 (12-1
To 12-4) are, for example, as shown in FIG. 2 and FIG.
The upper end of the outer leg 16 is fixed to the table main body 22 and is disposed at each corner of the table main body 22 having the table surface 20 on the upper surface.

As shown in FIGS. 1 and 4, the slide device 14 includes, for example, an outer rail 24 and an inner rail 26, and the inner rail is connected to the outer rail 24 via rolling elements such as steel balls 28 and rollers 30. It is slidably assembled inside.

4, the outer rail 24 and the inner rail 26 are, for example, formed by bending a large and small cross section in a substantially U-shape, and an inner flange 32 is formed at the open end of the outer rail. A flange 34 is formed at each of the open ends. A steel ball 28 is arranged between the inner flange 32 and the flange 34 so as to be separated from each other in the vertical direction on the left and right sides, and the roller 30 is disposed between the outer rail 24 and the inner rail 26. In this configuration, the steel balls 28 and the rollers 30 roll, thereby ensuring, for example, a smooth sliding of the outer rail 24 in the vertical direction with respect to the inner rail 26.

In the embodiment, the steel ball 28, the roller
30 are both interposed between the outer rail 24 and the inner rail 26 as rolling elements. However, the slide device 14
For example, since it is sufficient that the inner rail 26 is slidably incorporated in the outer rail 24, either the steel ball or the roller may be omitted. Further, the outer rail 24 and the inner rail 26 are not limited to the illustrated shapes, and may have other shapes.

As shown in FIGS. 2 and 4, for example, the inner rail 26 of the slide device is fixed to the inner leg 18, and the outer rail 24 is connected to the outer leg 16 through the notch 36 of the inner leg. It is fixed.

As shown in FIGS. 1, 2 and 4, for example, the nut is welded to the side surface of the inner rail 26 or the like.
A lead screw 42 having an upper end and a worm wheel 40 that can be integrally rotated is screwed to a nut. The worm wheel 40 extends upward from the upper end of the outer leg 16, that is, extends into the table body 22.

Then, as shown in FIG. 1 and FIG.
Inside 22, a driving means 44 provided outside the table body, for example, a worm 48 operably connected to an operation handle is connected to a worm wheel of the lead screw 42.
40 is engaged.

The lead screw 42 and the worm 48 are respectively supported by a bracket (not shown) provided on the table main body 22 so as to be immovable in the axial direction. For example, a slide bearing (not shown) may be provided on the upper surface of the worm wheel 40 so as to receive a load acting on the table surface 22 from above. In such a configuration, since the thrust bearing receives the load acting on the table surface 22 from above, the worm wheel 40, that is, the lead screw 42 can be smoothly rotated without being affected by the load.

For example, as shown in FIG. 2, when the operating handle (driving means) 44 is operated to rotate the worm 48 in a predetermined direction in the contracted state of the leg 12, that is, in the lowered position of the table surface 20, the worm wheel 40 rotates with lead screw 42 in the corresponding direction. Then, with the rotation of the lead screw 42, the nut 38 moves downward (screw advance) together with the inner rail 26 of the slide device, and slides the inner rail 24 downward with respect to the outer rail. That is, the leg 12 is extended by the screw 38 being advanced (see FIG. 5).

Here, as can be seen from FIGS. 2 and 5, since the inner leg 18 is installed on the floor surface 50 or the like, when the nut 38 is screwed by the rotation of the lead screw 42, the inner leg 18 is moved to the inner leg. On the other hand, the outer leg 16 and the table main body 22 are raised, and the height of the table surface 20 with respect to the floor surface is adjusted.

Also, as shown in FIG. 5, when the table handle 20 is in the raised position, the operation
When the nut 48 is rotated in the reverse direction, the lead screw 42 is rotated in the reverse direction via the worm wheel 40 to move the nut 38 upward (screw advance). Then, since the lead screw 42 descends in the axial direction with respect to the nut 38, the outer rail 24
Descends with respect to the inner rail 26, and the outer leg 18
Is slid downward with respect to the inner leg 26. That is, the leg 12 is contracted by the reverse rotation of the worm 48, and the table surface 20 is lowered.

In the lifting table 10 of the present invention, as shown in FIG.
-1 to 12-4. In the embodiment of the present invention, the lead screws 42 of the legs 12-1 to 12-4 are operatively connected to the operation handle 44 by the interlocking mechanism 52. The interlocking mechanism 52 includes, for example, a connecting means 54 and a gear means 56.

As can be seen from FIG. 1, in the legs 12-2 to 12-4, similarly to the leg 12-1, the worm wheels 40-2 to 40-4 of the respective legs correspond to the corresponding worms 48-2 to 48-4. Then, first, the worm 48-2 corresponding to the leg 12-2 is connected to the worm 48-2 via the connecting means 54 of the interlocking mechanism connected by the joint 58, for example.
-1, that is, connected to the operation handle 44 so as to be interlockable. As the connecting means 54 of the interlocking mechanism, for example, a flexible shaft having flexibility can be used. In such a configuration, when the operation handle 44 is rotated, the worm 48
-2 rotates together with the worm 48-1 and the torque of the operating handle is simultaneously transmitted to the lead screws 40-1 and 40-2 via the corresponding worm wheels 40-1 and 40-2. Is done.

Next, as shown in FIG. 1, the torque transmitted from the operation handle 44 to the worm 48-2 corresponds to the leg 12-3 via the connecting means 54 and the gear means 56 of the interlocking mechanism, for example. Worm 48-3 and the worm 48-4 corresponding to the leg 12-4. The gear means 56 includes, for example, bevel gears 60, 62 provided rotatably integrally with the worms 48-2, 48-3, and corresponding bevel gears 64, 66 meshed with the bevel gears 60, 62, respectively. It has. And bevel gear
60 is operatively connected to the worm 48-3 corresponding to the leg 12-3 via a connecting means 54 connected by a joint 58, and the bevel gear 66 is connected to the leg 12- via the connecting means. It is linked to the worm 48-4 corresponding to 4.

In such a configuration, when the operation handle 44 is rotated, the worms 48-1 to 48-4 rotate integrally via the interlocking mechanism 52, and the corresponding worm wheels 40-1 to
The rotational force of the operation handle is simultaneously transmitted to the lead screws 40-1 to 40-4 via 40-4. That is, the legs 12-1 to 12-4 expand and contract simultaneously by rotating the operation handle 44, and the table surface 20 is moved up and down in parallel.

The worms 48-2 to 48-4, the connecting means 54, the gear means 56
Like the worm 48-1, the table body 22 cannot be moved in the axial direction by a bracket (not shown) or the like.
Each is supported inside.

As described above, according to the elevating table 10 of the present invention, the leg 12 is formed in a telescopic double structure in which the inner leg 18 is slidably housed in the outer leg 16, and the sliding device 14 is provided. It is located in the inner leg of the leg. In other words, unlike a known configuration in which a table plate formed separately and a cross link interposed between the table bodies and the table plate is supported by the cross link, that is, the table body, the table body having the table surface 20 is provided in the present invention. 22 is supported by the extendable legs 12. Therefore, the table body 22 can be properly supported by the legs 12 at any height of the table surface 20, and the stability of the table surface 20 is improved.

Also, without using a cross link, the table device 20 can be raised and lowered by expanding and contracting the leg 12 in which the slide device 14 is disposed inside the inner leg 18, so that the size of the elevating table 10 can be sufficiently reduced in size and weight. And the appearance quality of the lifting table is improved.

Since the cross link is not used, there is no need to provide a storage portion for the cross link in the table body 22 or the like. Therefore, a dead space is eliminated from the space below the table main body 22, a large space is obtained, and the lower space can be effectively used.

Here, since the slide device 14 has a configuration in which the inner rail 26 is incorporated in the outer rail 24 so as to be slidable in the longitudinal direction via the rolling elements such as the steel balls 28 and the rollers 30 as described above. In addition, it has the property of not causing blur in the rotation direction about the longitudinal direction.

In other words, the outer leg 16 and the inner leg 18 of the leg 12 are supported by the sliding device 14 so as to be extendable and contractible.
According to the present invention in which the slide device is directly operated by screwing and unscrewing of the nut 38 accompanying rotation of the lead screw 42, the outer leg and the inner leg in the rotation direction are reliably prevented from being shaken, and the lead screw The rotation of the nut following the rotation of the nut is reliably prevented by the slide device itself. Therefore, the prevention of the contact between the outer leg 16 and the inner leg 18 ensures smooth and easy expansion and contraction of the leg 12.

Further, by incorporating the outer rail 24 and the inner rail 26 via the rolling elements, rattling of the slide device itself is sufficiently suppressed, so that unlike a known configuration using a cross link having a free end, a table is provided. The backlash of the surface 20 is reliably reduced.

Then, the slide device 14 is moved to the inner leg 18 of the leg.
Since it is arranged inside the outer leg 16, it is sufficient to provide a gap between the outer leg 16 and the inner leg as much as clearance to secure sliding between them, the outer leg,
It is possible to reliably prevent a reduction in appearance quality and a reduction in safety due to the formation of an excessive gap between the inner legs.

In addition, if the operation handle 44 and the lead screw 42 are connected so as to be interlockable by the combination of the worm 48 and the worm wheel 40, the length of the leg 12, that is, the height of the table surface 20 is stepless. Can be adjusted. Therefore, a table surface 20 suitable for the height of the worker
Fine adjustment of the height can be easily performed. Therefore, an optimal working posture can be obtained, and excessive fatigue of workers and the like can be prevented.

Since the worm 48 is provided on the table body side, even if a pressing force is applied to the table surface 20 from above,
The table surface does not descend, and a stable table surface is obtained.

Also, a plurality of legs 12 provided on the table body 22 are provided.
If the lead screws 42-1 to 42-4 of the (12-1 to 12-4) are connected so as to be interlockable by the interlocking mechanism 52, the leg 12- 1 to 12-4 expand and contract simultaneously, and the table surface 20 is raised and lowered in parallel. for that reason,
The height adjustment operation of the table surface 20 can be easily performed.

In the embodiment, the outer rail 24 of the slide device is fixed to the outer leg 16 and the inner rail 26 is fixed to the inner rail 18. Conversely, the inner leg is fixed to the outer leg, and the outer leg is fixed to the inner leg. May be fixed to each other.

Also, fix the outer leg 16 to the table body 22,
The outer leg is configured to slide vertically with respect to the inner leg 18 installed on the floor 50 or the like. However, the present invention is not limited to this. For example, the inner leg 18 may be fixed to the table body 22 and the inner leg may slide with respect to the outer leg 16 installed on the floor 50 or the like.

The connecting means 54 of the interlocking mechanism 52 is embodied as a flexible shaft. However, the present invention is not limited to this. For example, a shaft made of a steel material having low flexibility may be used. However, the connecting means 54
Is a flexible shaft, worms 48-1 to 48-
4. At the time of assembling the gear means 56 and the like, not so high accuracy is required, so that the assembling work can be easily performed, and the working process can be simplified and workability can be improved.

Further, as the gear means 56 of the interlocking mechanism, a combination of a pair of bevel gears is illustrated, but the present invention is not limited to bevel gears, and other gears or the like constitute gear means for transmitting the rotational force of the operation handle 44. You may.

Here, in the embodiment, the operating handle 44 is exemplified as the driving means 44, and is embodied as a configuration for controlling the expansion and contraction of the leg 12 by manual operation. However, the present invention is not limited to this. For example, a motor driven and controlled by an operation switch may be provided as the driving unit 44, and the leg 12 may be expanded and contracted by driving control of the motor.

In addition, although illustrated as a lifting table 10 having four legs 12-1 to 12-4, the present invention is not limited to this, and another number of legs, for example, one to three, or five The same can be applied to a lifting table having legs such as. However, it goes without saying that the interlocking mechanism is omitted in the elevating table having one leg 12.

The lifting table 10 of the present invention is not limited to a work table, a cooking table, and the like, and may be applied to other tables, for example, a living table, a conference table, a dining room table, and the like.

Further, the present invention is not limited to a general table, and the idea of the present invention may be applied to, for example, a learning desk, an office desk, a kotatsu, and the like.

The embodiments described above are intended to explain the present invention, and do not limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are included in the present invention. Needless to say.

[Effect of the invention]

As described above, according to the elevating table according to the present invention, the legs are formed in a telescopic double structure in which the inner leg is slidably housed in the outer leg. That is, the table body having the table surface is supported by the extendable legs, and the table surface is raised and lowered by the expansion and contraction of the legs. Therefore, the table main body can be properly supported by the legs at any height of the table surface, and the stability of the table surface is improved.

In addition, since the slide device is arranged in the inner leg of the leg, and the leg is expanded and contracted by the direct operation of the slide device, the table surface can be raised and lowered. At the same time, the appearance quality of the lifting table is improved.

Further, since the slide device is disposed in the inner leg of the leg, there is no need to provide a storage portion or the like in the table main body, and a large space can be obtained below the table main body, and the lower space can be effectively used.

Further, the outer leg and the inner leg of the leg are extendably supported by a slide device, and the nut is screwed and retracted with the rotation of the lead screw to directly operate the slide device. , The blur of the inner leg can be reliably prevented,
Legs can be smoothly and easily expanded and contracted.

And, since the slide device is arranged in the inner leg, it is sufficient to provide a gap between the outer leg and the inner leg, the clearance being sufficient to secure sliding between the outer leg and the inner leg. , And a decrease in appearance quality and stability due to the formation of the gap can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a liftable table according to the present invention in which a leg and a part of an interlocking mechanism are cut off, FIG. 2 is a schematic cross-sectional view taken along a line II-II in FIG. 3, FIG. Fig. 4 is a schematic perspective view of a lifting table, Fig. 4 is a schematic cross-sectional view of a leg, and Fig. 5 is a partial cross-sectional view of the lifting table in a raised position. 10: Elevating table, 12 (12-1 to 12-4): Leg, 14: Slide device, 16: Outer leg, 18: Inner leg,
20: table surface, 22: table body, 24: outer rail, 26: inner rail, 38: nut, 40 (40-1 to 40-
4): Worm wheel, 42: Lead screw, 44: Operation handle (drive means), 48 (48-1 to 48-4): Worm, 52: Interlocking mechanism.

Claims (1)

(57) [Scope of request for utility model registration] 1. A table body having a table surface on an upper surface, and a double structure in which an inner leg is slidably housed in an outer leg, and one of the outer leg and the inner leg is fixed to the table body so as to be expandable and contractible. The inner rail is slidably assembled in the outer rail with the interposition of the leg and the rolling element, and one of the inner rail and the outer rail is placed in the inner leg and the other is placed in the inner leg. A sliding device fixed to the outer leg through the notch of the inner leg, a nut integrally fixed to the rail on the movable side with respect to the table body, of the outer rail and the inner rail of the sliding device, and screwed to the nut And a lead screw pivotally supported with respect to the table body. Then, the lead screw is made rotatable by a driving means operatively connected to the lead screw, and the table surface is raised and lowered by the screw advancement of the nut accompanying the rotation of the lead screw and the expansion and contraction of the slide device under the screw retreat. Elevating table made possible.