JPH0511766Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a foldable top table that can be suitably used as a reception table or the like set in a banquet hall.

[Prior Art] Conventionally, as shown in FIG. 6 and FIG. 7, this type of table has a top plate c and a top plate c, which is made up of a pair of top plate elements a and b that are foldably connected to the bottom side. ,
This top plate c includes a pair of legs d and e pivotally attached to the lower surface side of each top plate element a and b, and a link mechanism f that maintains these legs d and e in an upright position at all times. , when folding the top plate c, the legs d,
A structure in which e can be approached by substantially parallel movement is known. The lower end of each of the legs d and e is bent outward, and a wheel g such as a caster is attached to the tip of the lower end to facilitate transportation. That is, as shown in Fig. 7, this type of table is stored in a warehouse or the like with its top plate c folded, and when necessary,
Since it is common to pull it out and use it in a banquet hall or the like, it is essential to provide wheels g such as the casters.

[Problem that the invention attempts to solve] However, if such a wheel g is provided,
There is a problem in that it is difficult to securely fix the table when setting it up in a banquet hall or the like. That is,
Such a table is installed in a predetermined position with the wheels g locked, but simply locking the wheels g tends to cause the stability of the table to be lost due to rattling of the locking mechanism. There is. In addition, when used in a hotel banquet hall, etc., it is necessary to arrange and clear a large number of tables in a short period of time, so it is necessary to lock and release the individual wheels of each table. This is very troublesome and is often used without the lock operation. As a result, a problem has arisen in which the table moves inappropriately during use.

In addition, due to the structure of such a device, it is necessary to bend the lower end of each leg d and e outward and provide a wheel at the tip, so the wheel mounting portion protrudes below the foot when in use. , there is also the problem that it gets in the way.

The present invention aims to solve the above problems.

[Means for solving the problem] In order to achieve this purpose, the present invention
The following configuration is adopted.

In other words, the foldable top table according to the present invention includes a top plate in which a pair of top plate elements are arranged in a row so as to be foldable toward the bottom side, and a top plate that is pivoted to the bottom side of each top plate element of the top plate. The device comprises a pair of legs and a link mechanism that maintains the legs in an upright position at all times, and is configured so that the legs can move approximately parallel to each other when the top plate is folded. , a base body having a wheel located between the two leg bodies, each lower end being pivoted to two lower connecting points sandwiching the center of the base body, and each upper end being diagonally outward and upwardly relative to the lower connecting point. a pair of support link members pivotally connected to the upper connection points of each of the legs, and a pair of support link members whose lower ends are pivoted near the lower ends of the support link members and whose upper ends are mutually pivoted. and a guide means provided at the center of the base body for guiding the upper end pivot point of the attitude control link member so that it can move only in the vertical direction, and using a top plate. The supporting link member is dimensioned so that the lower surface of the wheel is located above the lower end surfaces of both legs when the wheel is unfolded.

[Operation] With such a configuration, when the pair of top plate elements is folded downward, the pair of legs move in parallel and move toward each other. the result,
The expansion angle between the pair of support link members whose upper ends are connected to the legs gradually becomes smaller, and both support link members begin to stand up. As a result, the base body is pressed against the floor surface through the wheels, and the legs are lifted upward and floated from the floor surface. At this time, the distance between the lower ends of the pair of attitude control link members connected to the vicinity of the lower ends of each support link member becomes smaller, and both of these attitude control link members also stand up. The upper end pivot point of the link member for both attitude control is
The guide means provided on the base body guides it upward without shifting left and right. Therefore, both of the support link members are
They will rotate at the same angular velocity, and the legs and the top plate will be lifted and folded directly above the base. Therefore, in this state, the entire table can be moved to an appropriate position by the rolling action of the wheels.

When the top plate element is opened from such a folded state, the legs are moved apart and lowered due to the reverse operation. Therefore, when the top plate element is unfolded to a level state, the lower surface of the wheel is located above the lower end surface of the leg, so that the leg is in contact with the floor surface. The wheels of the base will be lifted off the floor as they will receive the full load. Therefore, the entire table can be positioned and installed on the floor in a stable manner without locking the wheels.

In such a state of use, the base body is located between the legs. Therefore,
The wheel mounting portion no longer protrudes beneath the user's feet.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 5.

Similar to the conventional table, this table includes a top plate 2 which is made up of a pair of top plate elements 1L and 1R arranged in a row so as to be foldable toward the bottom side, and each top plate element 1L and 1R of this top plate 2. Pair of legs 3 pivoted on the bottom side
L, 3R, and a link mechanism 4 that always maintains these leg bodies 3L, 3R in an upright position.

To be more specific, the top plate 2 is, for example, circular. Therefore, each of the top plate elements 1L, 1R is
It has a semicircular arc shape with straight sides 11L and 11R corresponding to the diameter of the top plate 1, and its lower surface 12L,
12R has channel-shaped frames 13L, 13R with one end located on the straight sides 11L, 11R. And both the top plate elements 1L, 1R
One end 13La, 13 of the frames 13L, 13R
By hinged Ra together via the shaft 14,
Both top plate elements 1L and 1R can be folded downward.

The legs 3L, 3R are pipe-shaped, and their upper ends are connected to the frames 13 of the corresponding top plate elements 1L, 1R.
It is rotatably attached to L and 13R via shafts 31L and 31R. As shown in FIGS. 1 and 4, the link mechanism 4 is connected to the top plate element 1L,
A hollow hanging member 41 whose upper end is connected to the shaft 14 connecting the elements 1R, and a hollow hanging member 41 which is provided parallel to the frames 13L, 13R of the top plate elements 1L, 1R, and whose inner end is connected to the lower end of the hanging member 41. It comprises a pair of link members 44L, 44R which are pivotally connected via a shaft 42 and whose outer ends are connected to the corresponding legs 3L, 3R via shafts 43L, 43R. The link mechanism 4 includes an elastic biasing mechanism 5 for biasing the top plate 2 in the folding direction, and a mechanism for holding the top plate 2 in the unfolded position against the biasing force of the elastic biasing mechanism 5. A locking mechanism 6 is attached.

As shown in FIGS. 4 and 5, the elastic biasing mechanism 5 includes a piston member 51 inserted vertically slidably into the hanging member 41, and the hanging member 4.
A compression spring 52 is housed inside the frame 1 and urges the piston member 51 downward, and a lower protruding end 51a of the piston member 51 is connected to the frame 1
A pair of link members 5 connected to 3L and 13R
3L and 53R, both the frames 1 are
3L and 13R are biased in the direction of folding the top plate.

As shown in FIG. 1, the lock mechanism 6 includes a rotating shaft 61 which is rotatably attached to the lower protruding end 51a of the piston member 51 and has an operating lever portion 61a at its end; The piston member 51 is equipped with a locking pawl 62 fixed to the holder and a locking pin 63 protruding from the outer surface of the hanging member 41. By unfolding the top plate 2 to the use position, the piston member 51 can be moved. The locking claw 62 can be engaged with the locking pin 63 at the position where it is most recessed into the hanging member 41.

The parts described above have the same structure as the conventional one, but the table of the present invention further includes a base body 7 located between the legs 3L and 3R, and a base body 7 located between the legs 3L and 3R. Each lower end 8 on the base 7
1L and 81R are pivotally connected, respectively, and the upper ends 82L and 82
A pair of supporting link members 8L, 8R are pivotally connected to the legs 3L, 3R, and lower ends 91L, 91R are attached to these supporting link members 8L, 8R.
a pair of attitude control link members 9L, 9R with their upper ends 92L, 92R pivoted to each other;
The guide means 10 is provided at the center of the base body 7 and guides the upper end pivot points of the posture control link members 9L, 9R so as to be movable only in the vertical direction.

As shown in FIGS. 1 and 2, the base 7 has
Linear sides 11L, 11R of the top plate elements 1L, 1R
Two horizontal structural members 71 arranged in a direction perpendicular to the horizontal structural member 71 are connected via a horizontal member 72, and casters 73, which are wheels, are provided at both ends of the lower surface of each horizontal structural member 71.

As shown in FIGS. 1 and 4, the pair of supporting link members 8L and 8R have lower ends 81L and 8R, respectively.
81R are connected to the two lower connecting points 74L, 74R sandwiching the center of the horizontal structural member 71 of the base 7, and their respective upper ends 82L, 82R are diagonally outwardly and upwardly connected to the lower connecting points 74L, 74R. The upper connecting points 32L, 32 of each of the legs 3L, 3R located at
It is pivoted at R, and when the table is in use, it assumes an inverted V-shaped posture.

Paired posture control link members 9L and 9R
As shown in FIGS. 1 and 4, each lower end 9
1L and 91R are pivoted to the lower ends of the corresponding support link members 8L and 8R, and the upper ends 92L and 9
2R are pivotally connected to each other via a shaft 93 forming an upper pivot point. However, these link members 9
L and 9R are set so as to form an opening angle of about 90° with respect to each other when the table is folded.

As shown in FIGS. 1 and 4, the guide means 10 includes a guide plate 102 having a vertical slit 101 erected in the center of the horizontal structure 71 of the base 7. A shaft 9 that pivotally connects the attitude control link members 9L and 9R to each other.
3 is slidably inserted. The width of the slit 101 gradually decreases upward, and is set so that the gap between the shaft 93 and the slit 101 can be reduced to approximately zero in the folded state.

If the configuration is like this, the operation lever 6
When the rotating shaft 61 is rotated by the operation 1a and the locking pawl 62 is released from the locking pin 63, the shaft 14 provided on the frame hinge part of the top plate 2 is moved upward by the biasing force of the compression spring 52. At the same time as being pressed, the frames 13L and 13R are pulled downward via the link members 53L and 53R,
A force in the folding direction is applied to the top plate 2. When the top plate elements 1L and 1R are folded downward by adding appropriate human operating force to this force,
The pair of legs 3L and 3R performs an approaching motion while moving substantially in parallel. As a result, the expansion angle between the supporting link members 8L, 8R, which form a pair in which the upper ends 82L, 82R are connected to the legs 3L, 3R, becomes gradually smaller.
8R stands up. Therefore, as shown in FIG.
, the leg bodies 3L and 3R are lifted upward and floated from the floor surface F. At that time, a pair of attitude control link members 9 connected to the lower end portions of each of the support link members 8L and 8R
The distance between the lower ends of L and 9R also becomes smaller, and these two attitude control link members 9L and 9R also stand up, but these two attitude control link members 9L,
The shaft 93 forming the upper end pivot point of 9R is guided upward by the slit 101 of the guide means 10 provided in the base 7 so as not to shift laterally. Therefore, both support link members 8L, 8R
are rotated at the same angular velocity with respect to the base body 7, and as shown in FIG.
L, 3R and the top plate 2 are lifted directly above the base 7 and folded. Therefore, in this state, the entire table can be moved to an appropriate position by the rolling action of the caster 73. In this state, it is in a compact posture, making it suitable for storage.

From this folded state, the top plate element 1L,
As you open 1R, the operation is the opposite of the previous one,
The legs 3L, 3R descend while separating. Therefore, as shown in FIGS. 1 and 4, when the top plate elements 1L and 1R are expanded to a flush use state and the locking pawl 62 is engaged with the locking pin 63, , the lower surface 73a of the wheel 73 is located above the lower end surface 3a of the legs 3L, 3R (see FIG. 4). That is, the supporting link members 8L, 8 are arranged so that they have such a positional relationship.
The dimension of R is set. As a result, the leg 3
L and 3R come into contact with the floor surface F and receive the full load, and the wheels 73 of the base body 7 rise above the floor surface F. Therefore, even without locking the wheels 73, the entire table can be positioned and installed on the floor F so that it will not easily move. Therefore, with such a structure, the stability of the entire table will not be impaired due to rattling of the locking mechanism of the caster.

In such a state of use, the base 7
is located between the legs 3L and 3R. Therefore, it is possible to solve the conventional problem that the part to which the caster is attached is easily touched by the user's feet, making it extremely easy to use.

Note that the shape of the top plate is, of course, not limited to a circular shape, and can be modified in various ways without departing from the spirit of the present invention.

[Function] Since the present invention has the above-described configuration, it can be installed and used in a stable state without rattling on the floor without special wheel locking operations, etc. Therefore, it is possible to provide a folding table that is easy to use, since the transport wheel portion does not sometimes protrude under the user's feet.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention; Figure 1 is a front view, Figure 2 is a side view, Figure 3 is a front view showing the folded state, and Figure 4 shows the main parts. A schematic front view and FIG. 5 are action explanatory views. FIG. 6 is a front view of a conventional example, and FIG. 7 is a front view of the conventional example in a folded state. 1L, 1R...Top plate element, 2...Top plate, 3L,
3R...Leg body, 3a...Lower end surface, 4...Link mechanism, 7...Base body, 8L, 8R...Support link member, 9L, 9R...Posture control link member,
10... Guide means, 73... Wheels, 73a... Lower surface.

Claims (1)

[Claims for Utility Model Registration] A top plate consisting of a pair of top plate elements that are foldably connected to the bottom side, and a pair of legs pivoted to the bottom side of each top plate element of the top plate. and a link mechanism that maintains both legs in an upright position at all times, and is configured such that when the top plate is folded, the legs move approximately parallel to each other so that they can approach each other. A base body having a wheel located in the middle, and each leg having its lower end pivotably connected to two lower connecting points sandwiching the center of the base body, and each leg having its upper end positioned diagonally outward and upwardly with respect to the lower connecting point. A pair of support link members pivotally connected to the upper connection points of the body, and a pair of posture control members with the lower ends pivoted near the lower ends of each support link member and the upper ends mutually pivoted. a link member, and a guide means provided at the center of the base body for guiding the upper end pivot point of the attitude control link member so as to be movable only in the vertical direction, with the top plate unfolded to the use position. The folding top table is characterized in that the dimensions of the supporting link member are set so that the lower surface of the wheel is located above the lower end surfaces of both legs.