JPH0568618A - Moving type table and leg structure - Google Patents

Abstract

PURPOSE:To provide a very simple moving type table which can obtain a very stable installed state and movable state by a simple raising/laying-down and turning operation of a top plate, and also, does not stand in the way of table user's feed by contracting front/rear length and height of a leg base. CONSTITUTION:Leg seats 31, 32 combined with caster bases are supported axially so as to be turnable vertically in the lower parts of the front and the rear ends of leg bases 3 of the left and the right supports for supporting a top plate 5 so that it can be raised and laid down, front and rear casters 1, 2 are attached thereto, and at the time of raising the top plate 5, the front and the rear casters 1, 2 are allowed to descend and brought into contact with the floor surface, while turning upward the front and the rear leg seats 31, 32 combined with caster bases, On the other hand, at the time of laying down horizontally the top plate 5, this table is constituted by providing an interlocking mechanism 40 for turning down-ward the front and the rear leg seats 31, 32 combined with caster bases and bringing them into contact with the floor surface and floating the front and the rear casters.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable table mainly used in a meeting place, a hall, a conference room and the like, and a leg structure used in these movable tables and movable chairs.

[0002]

2. Description of the Related Art In recent years, it has been demanded that a meeting place, a hall, etc., be set up quickly according to the number of people and the purpose of use, and a mobile table which is easy to install and move is often used. In this type of mobile table, the leg structure under the left and right columns is devised to ensure smooth movement and stability when installed on the floor. That is, there are long leg bases in the front-rear direction at the lower ends of the left and right columns that support the top plate, and floor seats are provided at the front and rear ends of the lower parts of these left and right leg bases. Casters are arranged near the inside of the leg seats. These front and rear casters are vertically attached to and supported by an elevating caster base provided in the leg base so as to be vertically movable via an operation lock mechanism.

When the front and rear casters of the leg base are pushed down by the operation lock mechanism via the elevating caster base below the front and rear leg seats of the leg base, the front and rear leg seats of the leg base are floated and held from the floor surface. Only the casters touch the floor, enabling smooth traveling of the entire table. On the contrary, when the lock is released, the front and rear casters are lifted together with the lift caster base by the weight of the entire table, the leg base is lowered, and the front and rear leg seats are grounded on the floor surface, and a stable installation state is obtained.

[0004]

By the way, in the above-mentioned conventional movable table, the elevating caster base is provided in the leg base having front and rear leg seats so as to be movable up and down through the operation lock mechanism. Since the front and rear casters are attached to the front part, a special operation lock mechanism is required to move the front and rear casters up and down, and the structure is complicated and the operation is troublesome.

Further, the casters in front of and behind the leg seats in the front and rear of the leg base must be arranged inside, and the distance between the front and rear casters is short by that much, and the front and rear casters are in contact with the floor surface in a moving state. Lack of time stability. On the contrary, if casters are attached to the front and rear ends of the leg base and the front and rear leg seats are attached to the elevating base so that vertical movement is possible, the front and rear leg seats must be placed inside the front and rear casters. Therefore, the distance between the front and rear leg seats is shortened, and the stability is poor when the front and rear leg seats are grounded on the floor. In other words, the floor grounding positions of the front and rear legs and the floor grounding positions of the front and rear casters are displaced forward and backward, and the distance between the front and rear floor surface grounding positions of the two is different from each other. There was a problem of lack of stability in one of the states. In either case, the longitudinal lengths of the left and right leg bases must be increased to increase stability, and in such a case, there is a problem that the leg bases obstruct the feet of the table user.

Further, the casters are attached vertically to the lifting caster bases in the leg bases, and are vertically moved up and down so that they are grounded on the floor or retracted into the leg bases. , The leg base must have a large enough vertical height to allow the casters in the vertical direction to move in and out. Therefore, the total height of the leg base is high, and there is also a problem that it interferes with the feet of the table user.

The present invention has been made in view of the above circumstances, and its first
The purpose of this is that the configuration is simple and the installation state and the movable state can be obtained by a simple turning operation of the top plate to the overturned state and the upright state, and the front and rear legs are grounded on the floor. In both the installed state and the movable state in which the front and rear casters are in contact with the floor surface, the distance between the front and rear floor surface grounding positions can be set large to maximize the front and rear length of the leg base. It is possible to increase stability by using it, stable installation state and smooth movement are possible, and it is possible to shorten the front and rear length and height of the leg base, which does not interfere with the feet of the table user. It is to provide a simple mobile table. The second purpose is
It is an object of the present invention to provide a leg structure most suitable for realizing the movable table or the like for the first purpose.

[0008]

In order to achieve the first object, the movable table according to the first aspect of the present invention has a pair of left and right leg bases having casters at the front and rear lower portions thereof, respectively, so that columns are erected. The top plate is erected so that it can be erected on the upper parts of the left and right columns, and is pivotally attached to the front and rear ends of the leg base and pivoted downward to project to the lower side of the leg base and to the floor surface. The caster base and leg seats that ground and retreat into the leg base when pivoted upward are provided, and casters are attached to the front and rear caster base and leg seats, respectively. It is mounted so that it projects to the side and is grounded to the floor surface and retracts into the leg base by rotating the leg seat downward, and is linked to the tilting and tilting movement of the top plate when the top plate stands up Rotate the caster base and base seat of the During horizontal overturning of the top plate, characterized in that which is configured by providing an interlocking mechanism which can be rotated around the caster base combined leg seat downward.

In the case of the movable table having the above-mentioned structure, when the top plate on the left and right columns is folded and raised, the front and rear caster base-combined leg seats are rotated upward through the interlocking mechanism interlocked with this. Then, the front and rear casters rotate downward and replace the caster base and leg seats to contact the floor surface. With this, all the front and rear casters of the left and right leg bases are in contact with the floor so that they can move. If the table is pressed lightly in this state, it will be possible to move to the desired place smoothly by the caster running. Since the top plate stands upright in this movable state, it becomes possible to collect and store a plurality of tables in a nesting state in a small space.

In addition, when installed in a conference room or the like, if the top plate is pivotally operated to fall horizontally, the interlocking mechanism interlocked therewith causes the front and rear caster base-combined leg seats to pivot downward, and The caster is rotated upward, and the caster base and the leg seat are grounded on the floor by replacing the casters before and after the caster, and a stable installation state can be obtained.

Further, as described above, by vertically rotating the front and rear caster base-combining leg seats, the front and rear caster base-combining leg seats and the front and rear casters alternate with each other so that they are grounded at the substantially same position on the floor. , The distance between the ground contact points before and after the front and rear caster bases is almost the same in both the installation state where the front and rear caster base seats are in contact with the floor and the movable state where the front and rear casters are in contact with the floor. Even if the front and rear length of the leg base is not too large, the distance can be set to a large value by making the most effective use of the front and rear length of the leg base, and stability can be increased. It is possible to move.

Further, since the front and rear casters move up and down by the rotation of the front and rear caster base-combined leg seats, in the installed state, the front and rear casters recede into the leg base in a state of horizontally jumping up. The vertical height is small, and the height of the leg base in the installed state can be reduced, so that it does not interfere with the feet of the table user.

According to a second aspect of the present invention, the leg structure is axially mounted in the leg base and is pivotally moved downward to project downward from the leg base to be grounded to the floor surface and pivoted upward to pivot the leg base. A caster base-combined leg seat that retreats into the inside is provided, and the caster is also mounted on this caster base-combined leg seat, and when the leg seat is rotated upward, the caster base is projected to the lower side of the leg base to contact the floor surface and below the leg seat. It is characterized in that it is mounted so that it can be retracted into the leg base by turning to.

With such a leg structure, by vertically rotating the caster base-combined leg seat, the front and rear caster base-combined leg seats and the front and rear casters are alternately replaced with each other to ground the floor surface at substantially the same position. Since the casters retreat into the leg base in a state of being flipped up sideways by the upward rotation, it is ideal for realizing the movable table of the first invention described above or other movable coupling chairs, for example. It will be

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, as shown schematically in FIG. 6 and FIG. 7, the overall structure of the movable table is such that columns 4 are erected on a pair of left and right leg bases 3 each having casters 1 and 2 at the front and rear lower parts, respectively. A top plate 5 is supported on the upper part of the support column 4 so as to be able to rise and fall. Also, below the top plate 5, a luggage storage shelf 6 is provided.
And the curtain plate 7 is provided on the front side of the left and right columns 4.

The left and right leg bases 3 are made of aluminum alloy die-cast as shown in FIGS.
It is shaped like a cover that is long in the front-back direction and has a letter shape.
A column connection port 3a is provided near the front end of the upper surface of the leg base 3.

The left and right struts 4 are vertically elongated hollow oval tubes made of steel or the like with the leg base 3, and the lower ends thereof are connected and fixed to the stanchion connection ports 3a near the front end of the upper surface of the leg base 3 and are in a slightly rearward tilted state. The right and left columns 4 are connected to each other by a penetrating member 8. In addition, a housing 4a such as a separately formed head cover is provided on the upper ends of the left and right columns 4.
Is fitted. As shown in FIG. 4, screw holes 4b and 4c are formed in the housing 4a from the inside toward the upper rear portion and the lower front portion.

The top plate 5 is a horizontally long flat plate made of plywood with a decorative finish, and the top plate receiver 1 is provided on the lower surface near the left and right ends.
0 are attached and fixed by screws or the like.
As shown in FIG. 4, the left and right top plate receivers 10 have a cross-section inverted hat shape that is long in the front-rear direction. The pivot 11 is connected to the housing 4 at the upper end of the column 4.
By screwing into the screw hole 4b on the rear side of the upper part of a, the top plate 5 is centered around this pivot 11 as shown in FIG.
It is rotatably supported in a horizontally overturned state and as shown in FIG.

A lock mechanism 12 is provided for locking and holding the top plate 5 in a horizontally overturned state. As shown in FIG. 4, the lock mechanism 12 includes a lock roller 14 mounted by a bolt 13 that is screwed into a screw hole 4c near the lower front part of the housing 4a at the upper end of the column 4, and a shaft near the front end part of the top plate receiver 10. The lock lever 15 is attached so as to rotatably penetrate the portion 15a. A hook portion 15b that engages with the lock roller 14 in a disengageable manner is formed at a base end portion of the lock lever 15. A lock spring 16 such as a torsion coil spring is attached to the shaft portion 15a of the lock lever 15 at one end thereof.
And the other end is locked to the shaft portion 15a by the pin 17, and the lock lever 16 constantly urges the lock lever 15 to rotate in the direction in which the lock lever 15 is engaged with the lock roller 14. There is.

That is, as shown in FIG. 1, when the top plate 5 is tilted and turned horizontally, the lock mechanism 12 automatically engages the hook portion 15b of the lock lever 15 with the lock roller 14 so that the ceiling plate 5 is rotated. When the horizontal state of the plate 5 is held in a locked state, and when the lock lever 15 is pulled up and rotated with a finger against the lock spring 16 from this state, the lock roller 16 moves from the hook portion 1 to the hook portion 1.
5b is disengaged and unlocked, and the top plate 5 can be erected and rotated rearward as shown in FIG.

The lock levers 15 of the lock mechanism 12 are respectively provided on the left and right top plate receivers 10, and the shaft portions 15a of the left and right lock levers 15 are one connecting pipe 18.
Is linked to rotate in conjunction with the lock release operation from either the left or right.

The luggage storage rack 6 is a synthetic resin molded product, and the rack 6 is provided with a pair of front and rear parallel links 20 at both left and right ends as shown in FIGS. 1 to 3, and the upper ends of the parallel links 20 are connected to the top plate. It is attached by pivotally connecting to the left and right shelf link brackets 21 fixed to the lower surface of 5. As shown in FIG. 1, when the top plate 5 is in a horizontal overturned state, the shelf 6 maintains a horizontal state with a space below the top plate 5 due to its own weight, and as shown in FIG. When it is turned upside down, it is folded into a state of being joined to this front side.

Further, as shown in FIGS. 1 to 4, the curtain plate 7 has a horizontally long plate shape similar to the top plate 5, and has a sleeve plate portion 7a protruding rearward at both left and right ends. is there.
A pair of upper and lower curtain plate link receivers 22 are attached to the left and right ends of the rear surface of the curtain plate 7 by means of screws or the like, and the front ends of the left, right, upper and lower links 23, 24 are pivotally connected to them. The rear end of the relatively long upper link 23 is pivotally connected to the hanging tongue piece 10b of the reinforcing plate 10a that is superposed on the left and right top plate receivers 10, and the rear end of the short lower link 24 is It is pivotally connected to the inside of the left and right columns 4. Thus, the curtain plate 7 is attached to the front side of the left and right columns 4. As shown in FIG. 1, the curtain plate 7 is arranged in a vertical state when the top plate 5 is in a horizontal overturned state, and when the top plate 5 is in an upright state as shown in FIG. 2, the curtain plate 7 is slightly pulled up by the upper link 23. It is adapted to be joined to the front side of the left and right support columns 4 in a rearwardly inclined state.

Here, as shown in FIGS. 1 to 3 and FIG.
The front and rear casters 1 and 2 below the left and right leg bases 3 are free casters whose traveling directions can be freely changed.
These front and rear casters 1 and 2 are attached to caster base and leg seats 31 and 32 that are pivotally attached to the left and right leg bases 3 near the front and rear ends via shafts 30 so as to be vertically rotatable.

The front and rear caster base-combined leg seats (hereinafter simply referred to as leg seats) 31 and 32 are in the form of a slightly elongated rhombic piece, as shown in FIG.
The bottom edge is non-slip. This front leg seat 31
Is pierced through the shaft 30 in the left-right direction from the rear side substantially in the middle of the vertical direction, and the shaft 30 is supported by a pair of left and right bearings 33 fixed to the lower edge of the leg base 3 near the front end. It is attached so that it can rotate up and down. This leg seat 31
A caster stem 31a (see FIG. 5) is provided so as to project at a right angle from approximately the center of the rear surface side, and the front caster 1 is attached and supported by this. As shown in FIG. 1, the rear leg seat 32 is attached symmetrically to the front leg seat 31 in the front-rear direction, and the rear caster 2 is attached substantially in the center of the front leg seat 31.

That is, when the front and rear leg seats 31, 32 are in the vertical state in the vertical direction as shown in FIG.
The lower part of 2 protrudes downward from the leg base 3 and grounds stably on the floor surface, and the front and rear casters 1 and 2 are laterally supported in a direction opposite to each other to slightly float from the floor surface. When the seats 31 and 32 are pivoted about the respective shafts 30 so as to jump up in the directions away from each other, the front and rear leg seats 31 and 32 are moved to the leg base 3 as shown in FIG.
It is configured so that it can be accommodated by retracting laterally (sleeping state) inside, and in place of these, the casters 1 and 2 come down and stand upright to contact the floor surface. That is, the front and rear leg seats 31 and 32 are rotated up and down to alternately replace the casters 1 and 2 and to be grounded on the floor surface at substantially the same position.

Further, there is provided an interlocking mechanism 40 for interlocking the leg seats 31 and 32 and the casters 1 and 2 with the operation of raising and lowering the top plate 5 to alternately contact the floor surface. The interlocking mechanism 40 includes a lifting rod 41, a link 42, and front and rear sink rods 43 and 44.

The ascending / descending rod 41 is inserted from inside the leg base 3 into the pillar 4, and the upper end of the interlocking pin 45 is fixed to the top plate receiver 10 so as to be separated from the pivot shaft 11 to the lower front side as shown in FIG. Are connected to. The link 42 is in the shape of a triangular plate, and a shaft 46 extends through a side portion of the leg base 3, and the shaft 46 is supported by a pair of left and right bearings 47 fixed to the front side of the leg base 3 slightly from the middle. It is movably attached. The lower end of the elevating rod 41 is pivotally supported by a pin 48 at the apex portion of the link 42 facing the shaft 46.

The front sink rod 43 is relatively short, and its rear end is pivotally connected to the upper corner of the shaft 46 of the link 42 via a pin 49, and its front end is the front leg seat 31. Is pivotally connected to the upper end of the pin via a pin 50. The rear sink rod 44 is relatively long, and its front end is pivotally connected to the lower corner of the shaft 42 of the link 42 via a pin 51, and its rear end is the rear leg seat. Three
It is pivotally connected to the upper end portion of 2 via a pin 52.

However, in the case of the movable table having such a structure, the lock lever 15 of the lock mechanism 12 is pulled up and rotated by a finger against the lock spring 16 to disengage the hook portion 15b from the lock roller 14. When the lock is released, and in this state, the top plate 5 is folded up and rotated upright on the rear side of the left and right columns 4, the lifting rod 41 of the interlocking mechanism 40 that is interlocked with the left and right columns 4 is pulled up and the link 42 is pulled up.
2, the upper and lower ends of the front and rear leg seats 31 and 32 are pulled by the front and rear sink rods 43 and 44, so that the front and rear leg seats 31 and 32 jump up in a direction away from each other. The casters 1 and 2 in the front and rear come down and stand upright in contact with the floor base 3 while retracting laterally (sleeping state) into the leg base 3 to be housed. Like As a result, all the front and rear casters 1 and 2 of the left and right leg base 3 are brought into contact with the floor surface to be movable. If the table is pressed lightly in this state, it will be possible to move to the desired place smoothly by the caster running.

As described above, when the top plate 5 is erected and rotated, the luggage storage rack 6 is interlocked with the top plate 5 via the parallel link 20 and is tilted to the front side of the erected top plate 5 as shown in FIG. When the curtain plate 7 is brought into the joined state, the curtain plate 7 is pulled up by the upper link 23 and joined to the front side of the left and right columns 4 in a slightly tilted state. As a result, the top plate 5 and the curtain plate 7 stand up parallel to each other so as to sandwich the left and right columns 4 and the shelves 6 from the front and back, so that the front and rear width is small. If the plurality of tables are gathered in a nesting state as shown in FIG. 7B by moving by caster traveling in this state, a large number of tables can be stored and stored in a small space.

In the case of moving to a conference room or the like and installing it, the top plate 5 in the standing state is pulled up on the left and right support columns 4 and is turned and rotated in a horizontal state as shown in FIG. The raising / lowering 41 of the interlocking mechanism 40 is interlocked with this rotation and descends to push down and rotate the link 42. Along with this, the front and rear leg seats 31 and 32 are pushed by the front and rear sink rods 43 and 44, and the front and rear leg seats 31 and 32 rotate downwards to push the front and rear casters 1 and 2 upward. Turn it. With this, the front and rear casters 1 and 2 float up from the floor surface and retreat into the leg base 3 sideways (in a lying state), and the front and rear leg seats 31 and 32 are replaced with the front and rear leg seats 31 and 32.
It will descend more than it will be in the upright position and will be in contact with the floor surface, providing a stable installation condition.

When the top plate 5 falls and turns to the horizontal state, the hook portion 15b of the lock lever 15 automatically engages with the lock roller 14 to hold the horizontal state of the top plate 5 in a locked state. Further, when the top plate 5 is rotated to the horizontal state, the shelves 6 are brought into the horizontal state below the top plate 5 by the weight of the shelves via the parallel links 20, and the curtain plate 7 is moved to the horizontal position.
It is arranged vertically on the front side of the left and right columns 4 via 3, 24. In this way, the original table can be used.

As described above, the front and rear leg seats 31 and 32 are pivotally moved up and down by interlocking with the operation of raising and lowering the top plate 5, whereby the front and rear leg seats 31 and 32 and the front and rear casters 1 and 2 are connected. Since it is grounded on the floor so that it alternates, it requires only a small amount of operating force and does not require the large force required to lift the entire table as in the prior art.

Further, the caster bases supporting the front and rear casters 1 and 2 also serve as the front and rear leg seats, and the caster base-combined leg seats 31 and 32 rotate up and down so that the front and rear casters 1 and 2 are connected. Figure 1 alternating with each other
Also, as shown in FIG. 2, the floor is grounded at approximately the same position,
In both the installation state in which the front and rear caster base dual-use seats 31 and 32 are in contact with the floor surface and the movable state in which the front and rear casters are in contact with the first and second floor surfaces, the front and rear floor surface grounding positions are mutually exchanged. Even if the distances D become substantially equal and the front-back length of the leg base 3 is not excessively large, the distance D can be set to be large by making the most effective use of the front-back length of the leg base 3,
Stability can be increased and stable installation and smooth movement are possible.

Further, since the front and rear casters 1 and 2 are moved up and down by the rotation of the front and rear caster base / leg seats 31 and 32, in the installed state shown in FIG.
Since the 2 retreats into the leg base 3 in a state where the leg base 3 is flipped up in the lateral direction, the vertical height dimension of the leg base 3 can be small,
The height H of the leg base in the installed state can be lowered, and it will not interfere with the feet of the table user.

In the above-described embodiment, the interlocking mechanism 40 is interlocked with the up and down rotation of the top plate 5. However, a shelf that is up and down in association with the top plate 5 is provided, and the rotation of this shelf is performed. The interlocking mechanism may be interlocked with the movement. Further, the leg structure described above can be appropriately applied to, for example, a movable connecting chair in addition to the movable table. Other various changes may be made without departing from the scope of the present invention.

[0038]

Since the present invention is constructed as described above, the construction is simple, and the installation state and the movable state can be obtained by a simple turning operation of the top plate to the upright state and the upside down state. The leg base can be set to a large distance between the ground contact positions before and after the foot base is installed on the floor, and when the front and rear casters are movable on the floor. It is possible to increase the stability by making the most effective use of the front-rear length of the table, stable installation and smooth movement, and the front-rear length and height of the leg base can be shortened. You can get a very simple mobile table that does not get in your way. Since the present invention is configured as described above, it is possible to obtain a leg structure most suitable for realizing the movable table and the like.

[Brief description of drawings]

FIG. 1 is a side view of an installed state showing an embodiment of a movable table according to the present invention.

FIG. 2 is a side view of the movable table in the folding movable state.

FIG. 3 is a front view of the movable table of FIG.

FIG. 4 is an exploded perspective view showing a top plate receiver, a lock mechanism, and a curtain plate on an upper part of a column of the movable table.

FIG. 5 is an exploded perspective view showing the front and rear casters of the movable table, the caster base-combined leg seat, and the interlocking mechanism.

FIG. 6 is a schematic front view of the installation state of the movable table.

FIG. 7 (a) is a schematic side view of the movable table,
(B) is a side view in which a plurality of movable tables are moved to the nesting state.

[Explanation of symbols]

1, 2 ... Caster, 3 ... Leg base, 4 ... Struts, 5 ... Top plate, 31, 32 ... Caster base / leg base, 40 ... Interlocking mechanism.

Claims (2)

[Claims] 1. In a movable table in which pillars are erected on a pair of left and right leg bases having casters at front and rear lower parts, and a top plate is supported on the upper parts of the left and right pillars so as to be able to be tilted, Providing caster base and leg seats that are attached to the front and rear ends of the base, project downward to the lower side of the leg base by turning downward, ground to the floor surface, and retreat into the leg base by turning upward. , The casters on the front and rear caster base dual-purpose seats are respectively projected by the upward rotation of the foot seats so as to project to the lower side of the leg bases and contact the floor surface, and the downward rotation of the foot seats causes the casters to move into the leg bases. The casters are mounted in a retracted state, and when the top plate is erected, the front and rear caster base / leg seats are rotated upward when the top plate is erected and the front and rear casters are horizontally tilted. Base and leg seat down A movable table characterized by being provided with an interlocking mechanism for rotating the table. 2. A caster base which is pivotally mounted in a leg base and projects downward from the leg base so as to come into contact with the floor surface and to retreat into the leg base by an upward pivot operation. A dual-purpose leg seat is provided, and a caster is mounted on the dual-purpose leg seat, and the caster is rotated upward to project to the lower side of the leg base so as to contact the floor surface and to rotate the leg base downward. A leg structure characterized by being configured so that it can be retracted inside.