JP2001128741A - Ascending and descending table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ascending and descending table, the top board of which can be raised and lowered by selecting an operation position for other place even if its operation at one place is difficult due to a difference in the dominant arm or an obstacle or the like attributed to a layout. SOLUTION: Raising and lowering mechanisms capable of regulating the height of a top board in synchronization are incorporated in the right and left legs 2 supporting the top board 1 and operating sections 4 to drive the raising and lowering mechanisms are provided on the top face and the front ends of the right and left sides of the top board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting table, and more particularly, to a lifting table capable of adjusting a height of a top plate.

[0002]

2. Description of the Related Art Conventionally, various types of elevating tables capable of adjusting the height of a top plate have been provided. This type of lifting table has a built-in lifting mechanism capable of adjusting the height of the top plate in synchronism with the left and right legs supporting the top plate.

For example, the leg is formed by connecting a lower leg having a ground contact portion and an upper leg provided on the top plate so as to be concentrically slidable, and the elevating mechanism is provided with an adjusting shaft disposed in the leg. The upper part of the body is rotatably connected to the upper end of the upper leg so as to be rotatable in a fixed position, and a screw shaft formed at the lower part of the adjusting shaft is screwed to a nut fixed inside the lower leg.

However, since the operating part for rotating the adjusting shaft constituting the elevating mechanism is fixedly provided at one place on the top plate, it takes time and effort to perform the operation depending on the difference of the dominant arm. Further, depending on the layout, it may be difficult to move up and down due to obstacles or the like.

[0005]

SUMMARY OF THE INVENTION In view of the above situation, the present invention seeks to solve the problem when it is difficult to operate at a certain location due to a difference between the right and left dominant arms and obstacles due to the layout. However, an object of the present invention is to provide an elevating table capable of selecting an operation position in another place and smoothly elevating the top board.

[0006]

According to the present invention, in order to solve the above-mentioned problems, a lifting mechanism capable of adjusting the height of the top plate in synchronism with each other is incorporated in left and right legs supporting the top plate. Then, an elevating table is provided which is provided with an operation unit for driving the elevating mechanism at least on the upper surface part and the front end part on both left and right sides of the top plate. In other words, the operation units are provided at least at a total of four places, that is, an upper surface portion and a front end portion on both the left and right sides of the top plate, and the top plate can be moved up and down regardless of which operation unit is selected.

Here, the leg is formed by connecting a lower leg having a ground contact portion and an upper leg provided on the top plate so as to be concentrically slidable, and the lifting mechanism is provided within the leg. The upper part of the shaft body is rotatably connected to the upper end part of the upper leg so as to be rotatable in a fixed position, and the screw shaft part formed at the lower part of the adjusting shaft body is screwed to a nut part fixed in the lower leg. The upper end of the adjusting shaft faces the upper surface of the top plate to form an operating portion on the upper surface, and the adjusting shaft, the interlocking shaft laterally provided on the lower surface of the top plate, and the operating portion at the front end rearward. In a preferred embodiment, the extended operation shafts are arranged orthogonally to each other, and a gear transmission means is provided at the intersection.

[0008] Further, at least each of the operation parts provided on the upper surface part and the front end part on the right and left sides of the top plate, the top plate rises with respect to the rotation in the normal direction, and the top with respect to the rotation in the reverse direction. More preferably, the gear transmission means is configured so that the plate descends.

[0009] Further, if both ends of the interlocking shaft face both sides of the top plate and the ends are used as operating portions, the operating portions are formed on upper and lower left and right sides of the top plate, front ends and both ends. It will be provided at a total of six places in the section.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 shows an elevating table A according to the present invention, and FIGS.
In the drawing, reference numeral 1 denotes a top plate, 2 denotes a leg, 3 denotes an elevating mechanism, 4 denotes an operation unit, and 5 denotes a gear transmission means.

The elevating table A according to the present invention incorporates elevating mechanisms 3, 3 capable of adjusting the height of the top plate 1 in synchronism with the left and right legs 2, 2 supporting the top plate 1. , At least on the upper and lower surfaces on the left and right sides and the front end of the top plate 1 are provided with operation units 4 for driving the lifting mechanisms 3.

In the present embodiment, the top plate 1 is a wooden plate, and upper ends of the leg portions 2 are fixed to central portions on both sides of the lower surface 6. The leg 2 includes a hollow cylindrical lower leg 7 and a hollow cylindrical upper leg 8 provided below the top plate 1.
Are concentrically slidably connected to each other, and have a ground contact portion 9 extending in the front-rear direction at the lower end of the lower leg 7,
The upper leg 8 has a fixing plate 10 at the upper end, and the fixing plate 10 is attached to the lower surface 6 of the top plate 1. In this embodiment, the upper leg 8 has a structure in which the upper leg 8 is slidably fitted inside the lower leg 7. A cap 11 serving also as a slider is attached to the upper edge of the lower leg 7, and Spacer 12 doubles as slider on lower edge
So that the upper leg 8 moves up and down smoothly with respect to the lower leg 7.

The elevating mechanism 3 connects the upper part of the adjusting shaft 13 disposed in the leg 2 to the upper end of the upper leg 8 so as to be rotatable in a fixed position, and is formed at the lower part of the adjusting shaft 13. Nut part 1 with fixed screw shaft part 14 fixed in lower leg 7
5 is screwed.

[0014] More specifically, the adjusting shaft 13 is shown in FIG.
As shown in FIG. 5, the screw shaft portion 14 is formed in substantially the lower half, the shoulder portion 16 is formed in the upper end portion, and the operation portion 4 for engaging the operation handle 17 is formed in the upper end. The nut portion 15 is fixed in the upper end of a square pipe-shaped fixing member 18, and a fixing piece 19 at the lower end of the fixing member 18 is screwed to a bottom plate (not shown) of the lower leg 7 from below. I have.

As shown in FIGS. 5 and 6, with the thrust bearing 20 abutted on the shoulder 16 of the adjusting shaft 13, the gear transmission means is placed in the upper end of the upper leg 8 and above it. 5 is inserted from below through a synthetic resin bearing 24 into a shaft hole 23 of a horizontally fixed receiving plate 22 leaving a space portion 21 in which the adjusting shaft 1 is mounted.
3, a first helical gear 25 is fixedly connected to be rotatable in a fixed position. The fixing of the first helical gear 25 to the adjusting shaft 13 is performed by a pin 26 penetrating both.

The fixing plate 10 has an opening 27 provided therein.
At the upper end of the upper leg 8 and is fixed slightly above the receiving plate 22. That is, the upper end of the upper leg 8 protrudes above the fixing plate 10, and the gear transmission means 5 including the first helical gear 25 is built in the space 21 in the protruding portion. It is.

In order to interlock the lifting mechanisms 3 incorporated in the left and right legs 2, 2, an interlocking shaft 28 provided on the lower surface 6 of the top plate 1 is provided with a gear transmitting means 5 for each leg 2. Solid built-in shaft 2 connected to said adjusting shaft 13 via
8A and a hollow connecting shaft 28B connecting the two built-in shafts 28A, A. The built-in shaft 28A penetrates into and out of the upper leg 8 at substantially the same height as the first helical gear 25 so as to be orthogonal to the adjusting shaft 13 on the front side. Bearings 29, 30
And the first helical gear 25 in between.
A second helical gear 31 meshing with the front side of the helical gear is fixed with a pin 32 in the same manner as described above.

Further, an operation shaft 33 having a front end side operation portion 4 at a front end is disposed on both sides of the lower surface 6 of the top plate 1 in the front-rear direction, and a rear end of the operation shaft 33 is disposed. The fixed plate 10
Is inserted into the upper leg 8 from the front so as to be orthogonal to the built-in shaft 28A on the lower side at a position along the lower surface of the shaft, and a third helical gear 34 is fixed to the rear end thereof with the pin 35 in the same manner as described above. The third helical gear 34 is meshed with the lower side of the second helical gear 31. The front portion of the receiving plate 22 corresponding to the portion where the third helical gear 34 is provided is notched. Furthermore, in the present embodiment, since the cross-sectional shape of the leg 2 is an oval extending in the front-rear direction, the restricting piece 36 is fixed to the front inside the upper end of the upper leg 8, and the operating shaft is attached to the restricting piece 36. The body 33 is penetrated, and the third helical gear 34 is
To ensure smooth rotation. The front end of the operating shaft 33 is rotatably supported by a bearing 37 fixed to the top plate lower surface 6.

On the lower surface 6 of the top plate 1, a portion corresponding to the upper end of the upper leg 8 is formed with a concave portion 38 for receiving an upper portion from the fixing plate 10.
A concave groove 39 for accommodating the interlocking shaft 28 is formed between the concave portions 38. The fixing plate 10 is attached to the lower surface 6 of the top plate 1 by a suitable fixing means such as a screw while receiving the upper end of the upper leg 8 having the gear transmission means 5 built in the recess 38.

Here, the strength of the top plate 1 is reduced by forming the concave grooves 39. To compensate for the reduced strength and further reinforce it, FIGS. 2, 3, 6, and 8 are used.
As shown in FIG. 7, a steel channel member 40 having fixing portions 40B and 40B along both sides of a receiving portion 40A having a U-shaped cross section is fitted into the receiving portion 40A in the concave groove 39, and both fixing portions are formed. 40B, 40B are attached to the lower surface 6 of the top plate by appropriate fixing means such as screwing or bonding.
In the present embodiment, the fixing portions 40B, 40B are also positioned on the steps 41, 41 formed on the lower surface 6 of the top plate so as not to protrude from the lower surface 6. After accommodating the interlocking shaft 28 in the accommodating portion 40A of the channel member 40, a steel cover member 42 having a U-shaped cross section opened upward is fitted into the accommodating portion 40A.
A is closed so that the lower surface 6 has no irregularities. Incidentally, the structure in which the cover member 42 is fitted to the channel member 40 is constituted by a plurality of engagement holes 43,.
Are formed, and projections 44,... Are formed on both outer surfaces of the cover member 42 corresponding to the engagement holes 43, and are prevented from coming off by the engagement between the engagement holes 43 and the projections 44.

Here, when the channel member 40 and the cover member 42 are integrated, the channel member 40 and the cover member 42 have a hollow pipe shape, so that the bending strength is extremely high. Further, in the present embodiment, the channel member 40 is formed of a steel plate having a large thickness, for example, 1.6 mm thick. Note that the cover member 42 has a plate thickness of 0.1 mm.
8 mm.

As described above, the adjusting shaft 13, the interlocking shaft 28 laterally provided on the lower surface 6 of the top plate 1, and the operating shaft 33 are orthogonally arranged, and the gear transmission means 5 is provided at the intersection. And the gear transmission means 5 comprises a first helical gear 25, a second helical gear 31, and a third helical gear. Therefore, each of the operation units 4,... Provided on the upper surface portion and the front end portion on the left and right sides of the top plate 1 raises the top plate 1 with respect to the rotation in the normal rotation direction, and moves the top plate 1 with respect to the rotation in the reverse rotation direction. The gear transmission unit 5 is configured so that the top plate 1 descends. The upper end of the adjusting shaft 13 faces the upper surface from the through hole 45 of the top plate 1 to form an operating portion 4 on the upper surface, and the front end of the operating shaft 33 faces the front from the bearing 37 and the front end. The operation unit 4 of the unit. In addition, the through hole 4 of the top plate 1
5 is fitted with a cap 46 having a lid that can be opened and closed,
The operating part 4 of the adjusting shaft 13 is located in the cap 46.

In the present embodiment described above, the operation section 4 is provided at a total of four places, that is, the upper surface section and the front end section on both the left and right sides of the top plate 1, and any one of the operation sections 4,. It is also possible to adjust the top plate 1 up and down. That is, when the operating handle 17 is connected to the operating portion 4 of the one of the right and left adjusting shafts 13 and rotated, the adjusting shaft 13 is directly rotated and the rotational force is transmitted from the first helical gear 25 to the first helical gear 25. (2) The interlocking shaft 28 is rotated via the helical gear 31, and the other adjustment shaft body 13 is rotated from the other second helical gear 31 via the first helical gear 25 in conjunction with the other. is there. Since the adjusting shafts 13 on both the left and right sides rotate in the same direction, the adjusting shafts 13 are vertically displaced relative to the nut portion 15 fixed to the lower leg 7, so that the height of the top plate 1 can be adjusted. When the operation handle 17 is connected to the operation portion 4 of one of the left and right operation shafts 33 and rotated, the rotational force is changed from the third helical gear 34 to the second helical gear 31 and the first helical gear. The power is transmitted to the adjusting shaft 13 via the gear 25,
The rotational force is transmitted from the second helical gear 31 to the interlocking shaft 28, and the other adjusting shaft 13 rotates in conjunction with the other, similarly to the above.

Further, although not shown, the interlocking shaft 2
8 are opposed to both sides of the top plate 1 and the ends are used as operation portions, so that the operation portions 4,.
The upper and lower ends, the front end, and both ends are provided at a total of six locations. Further, the example in which the helical gear is used as the gear transmission means 5 has been described, but a bevel gear may be used. Furthermore, it is also possible to configure by a rotation transmitting means that does not use a gear. The operation handle 17 is pivotally attached to the operation unit 4 so as to be foldable. When the operation handle 17 is not used, the operation handle 17 is housed in the front end portion of the top plate 1 in the lower rear direction, and is mounted on the upper surface portion. In that case, it is also possible to provide it on the upper surface and store it in the accommodation hole.

The procedure for assembling the lifting table A according to the present invention is as follows. First, the adjusting shaft 13, the built-in shaft 28 A and the operating shaft 33 are mounted on the upper leg 8 of the leg 2, and the first lottery is attached to each. After assembling the helical gear 25, the second helical gear 31, and the third helical gear 34 in advance, screw the screw shaft portion 14 of the adjusting shaft 13 to the nut portion 15 fixed to the fixing member 18 to a predetermined depth. Combine. At this time, as shown in FIG.
In a state where the hole 48 formed at the tip of the screw shaft portion 14 is located in the opening 47 formed on the side surface of the screw 8, a retaining pin 49 is fitted into the hole 48 or a screw is screwed into the hole 48 when excessively rising. It has a stopper. Then, the upper leg 8 is inserted into the lower leg 7 and the fixing member 18 is inserted into the lower leg 7 and fixed to the bottom surface. Then, after the channel member 40 is mounted in the concave groove 39 of the top plate 1 and each leg 2 is fixed at a predetermined position on the lower surface 6 of the top plate 1, the end of the channel member 40 overlaps the fixing plate 10. Therefore, the strength is increased. Then, the bearing body 37 is attached to the lower surface 6 of the top plate, the connecting shaft 28B is connected between the two built-in shafts 28A, 28A, and finally the cover member 42 is mounted.

Since there is no protrusion on the lower surface 6 of the top plate 1, a drawer (not shown) can be attached to the lower surface 6.

In another embodiment shown in FIG. 9, the shape of the top plate 1 is an irregularly shaped top plate, and in the illustrated example, the top plate 1 is a ring-shaped equally divided shape in plan view. That is, the front and rear edges of the top plate 1 are arcs and both side edges are straight. In this case, the legs 2, 2 are provided along both side edges, but the orthogonal state of the adjusting shaft 13, the interlocking shaft 28, and the operating shaft 33 is maintained. When a plurality of such lifting tables A,... Are combined, a large circular table as shown in FIG. 9 can be obtained, and the height of each top plate 1 can be set freely.
For example, a physically handicapped person and a healthy person sitting in a wheelchair can simultaneously take a seat.

[0028]

The lifting table according to the first aspect of the present invention has a built-in lifting mechanism capable of adjusting the height of the top plate in synchronism with the left and right legs supporting the top plate. ,
Since the operation unit for driving the elevating mechanism is provided at least on the upper surface portion and the front end portion on both the left and right sides of the top plate, the operation portion includes:
It is provided at least at the upper and lower sides on both sides of the top plate and at the front end, so that the top plate can be adjusted up and down regardless of which operation unit is selected. Even when it is difficult to operate at a certain place with an object or the like, it is possible to select an operation position at another place and smoothly move the top plate up and down.

According to the second or third aspect, each of the operation parts provided on the upper surface portion and the front end portion on the left and right sides of the top plate raises the top plate with respect to the rotation in the normal direction, and moves the top plate in the reverse direction. Since the top plate can be lowered with respect to the rotation, the operation of lifting and lowering the top plate can be performed without fail.

According to the fourth aspect, since the operation portions are provided at a total of six locations including the upper surface portion on the left and right sides of the top plate, the front end portion, and both end portions, the operability is further improved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a lifting table according to the present invention.

FIG. 2 is an exploded perspective view of the whole.

FIG. 3 is an exploded perspective view of the same main part.

FIG. 4 is an exploded perspective view showing a part of a lifting mechanism.

FIG. 5 is a vertical sectional side view of a main part.

FIG. 6 is a longitudinal sectional front view of a main part.

FIG. 7 is a vertical sectional plan view of a main part.

FIG. 8 is a partial vertical cross-sectional side view showing an accommodated state of an interlocking shaft.

FIG. 9 is a simplified plan view of a use state showing another embodiment.

[Explanation of symbols]

Reference Signs List A Lifting table 1 Top plate 2 Leg 3 Lifting mechanism 4 Operation unit 5 Gear transmission means 6 Lower surface 7 Lower leg 8 Upper leg 9 Grounding unit 10 Fixing plate 11 Cap 12 Spacer 13 Adjusting shaft 14 Screw shaft 15 Nut 16 Shoulder Part 17 Operation handle 18 Fixing member 19 Fixing piece 20 Thrust bearing 21 Space part 22 Receiving plate 22 Receiving plate 23 Shaft hole 24 Bearing 25 First helical gear 26 Pin 27 Opening 28 Interlocking shaft 28A Built-in shaft 28B Connection shaft 29, REFERENCE SIGNS LIST 30 bearing 31 second helical gear 32 pin 33 operating shaft body 34 third helical gear 35 pin 36 restricting piece 37 bearing body 38 concave section 39 concave groove 40 channel member 40A receiving section 40B fixing section 41 step section 42 cover member 43 Engagement hole 44 Projection 45 Through hole 46 Cap 47 Opening 48 hole

Claims (4)

[Claims] 1. A left and right leg supporting a top plate has a built-in lifting mechanism capable of adjusting the height of the top plate in synchronization with each other,
An elevating table provided with an operation unit for driving the elevating mechanism at least on the upper surface part and the front end part on both left and right sides of the top plate. 2. The leg according to claim 1, wherein said leg comprises a lower leg having a ground contact portion and an upper leg provided on said top plate so as to be slidable concentrically, and said elevating mechanism comprises an adjusting shaft disposed in said leg. The upper part of the body is connected to the upper end of the upper leg so as to be rotatable in a fixed position, and a screw shaft formed at the lower part of the adjusting shaft is screwed into a nut fixed inside the lower leg. The upper end of the adjusting shaft faces the upper surface of the top plate to form an operating portion on the upper surface, and the adjusting shaft, the interlocking shaft laterally provided on the lower surface of the top plate, and the rear extending from the operating portion at the front end. 2. The elevating table according to claim 1, wherein the operating shaft bodies are arranged orthogonally to each other, and a gear transmitting means is provided at the intersection. 3. An operation unit provided at least on the upper surface portion and the front end portion on both the left and right sides of the top plate, wherein the top plate rises with respect to rotation in the normal direction and rotates with respect to rotation in the reverse direction. The gear transmission means is constituted so that a plate descends.
The lifting table described. 4. The operation unit according to claim 1, wherein both ends of the interlocking shaft face both sides of the top plate, and the ends are used as operation parts.
Or the lifting table according to 2.