JP3546969B2 - table - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a table that can be suitably used, for example, for meetings, training, and the like.
[0002]
[Prior art]
2. Description of the Related Art A conventional table includes, for example, a deck-top type mobile desk disclosed in Japanese Utility Model Publication No. 4-2579. The mobile desk includes a support leg, a caster mounted on a lower part of the front and rear, the caster being disposed on the support leg so as to be movable up and down, connecting means disposed on the support leg so as to be movable up and down, A shelf or a deck linked to the connecting means so as to be rotatably supported by the legs and to move the connecting means up and down with the rotation.
When the deck (or shelf) is turned from the folded position to the horizontal position, the movable table is moved to a stationary state by moving the caster upward. When the deck is turned to the folded position from this state, When the caster moves down in conjunction therewith, it becomes movable.
Therefore, the mobile table in which the deck is folded and stored can be immobilized by rotating the deck to the horizontal position after being moved to the placement location, while being movable when retracted when the deck is folded. , Can be moved to the storage location.
[0003]
[Problems to be solved by the invention]
In the mobile desk, since the deck is turned to the horizontal position and becomes immobile at the same time, even if it is desired to adjust the arrangement while the deck is in the horizontal position in the aligning work, the work cannot be performed. For this reason, the deck must be folded again and re-arranged, or the entire desk must be lifted to adjust the arrangement, which is inconvenient.
Further, for example, it is conceivable to combine a caster that moves up and down by operating the operation lever disclosed in Japanese Utility Model Laid-Open No. 1-145227 with a deck overturning table. According to this, when the operating lever is operated in the horizontal position of the deck to make it movable, the arrangement can be adjusted, and the deck can be immobilized and fixed. However, since the rotation of the deck and the vertical movement of the caster are irrelevant, for example, during storage, in addition to the operation of folding the deck, the operation of moving the caster down by the operation lever is required, and the storing operation becomes complicated. Such a problem remains.
[0004]
The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a table that enables adjustment of arrangement while keeping a deck horizontal and that can be stored by a simple operation. To provide.
[0005]
[Means for Solving the Problems]
The invention of claim 1 that solves the above-mentioned problem is as follows.
In a deck overturning type table in which a deck is rotatably provided to a horizontal position and a folded position via a rotation shaft on a support leg,
An elevating caster having a caster that is provided on the support leg so as to be vertically movable and that protrudes and retracts on the ground surface of the support leg by the vertical movement thereof;
A caster position switching mechanism that switches the elevating caster between a lowered position and a raised position,
The caster position switching mechanism includes a link mechanism that links the rotating shaft and the elevating caster so that the elevating caster is moved up and down based on the rotation of the rotating shaft, and is capable of rotating the rotating shaft. With a simple operation lever,
The operation lever is provided so as to be switchable between a movable position where the elevating caster is at a lowered position and an immovable position at which the elevating caster is at a raised position in the horizontal position of the deck,
The link mechanism includes an elevating body coupled to the elevating caster, a rotatable link integrally rotatably coupled to the rotatable shaft, and a pin rotatably coupled to the elevating body and the rotatable link. And a connection link operably connected to the operation lever, which is operated at the time of a switching operation from a movable position to an immobile position to raise and lower the elevating caster from a lower position to an upper position, and from the immobile position of the operation lever. Activated at the time of the switching operation to the movable position to lower the elevating caster from the raised position to the lowered position, and also operate at the time of rotation of the deck from the horizontal position to the folded position when the elevating caster is at the raised position. Lowering the elevating caster to the lowered position, and rotating the deck from the horizontal position to the folded position when the elevating caster is in the lowered position; and It has a configuration which is not actuated upon rotation in the horizontal position from the Ritatami position
It is a table characterized by the following.
[0006]
[Action]
According to the table of the first aspect of the present invention, by operating the operation lever of the caster position switching mechanism from the movable position to the immovable position in the horizontal position of the deck , the link mechanism operates to raise the elevating caster from the lowered position. It is immovable because it is raised and lowered to the position.
Conversely, when the operation lever of the caster position switching mechanism is switched from the immobile position to the movable position, the link mechanism is operated to move the elevating caster from the ascending position to the descending position, so that the movable state is established.
Further, when the deck is turned from the horizontal position to the folded position in the immobile state, that is, when the elevating caster is in the ascending position, the link mechanism operates to move the elevating caster to the lowering position, so that the movable state is established.
Further, when the deck is turned from the horizontal position to the folded position while the movable state is in the lowered position, the link mechanism is not actuated, and the lift caster is not raised in the lowered position.
Further, when the deck is turned from the folded position to the horizontal position while the movable state is in the lowered position, the link mechanism is not actuated, and the vertical caster is not moved up in the movable state.
Also, as in the invention of claim 2,
The table according to claim 1,
The rotating shaft and the operation lever are connected to the rotating shaft, a driven bevel gear fixed on the connecting shaft, and rotatably supported on the deck, and It is preferable that the driving side bevel gear is connected to the operation lever and meshes with the driven side bevel gear so as to be interlockable therewith.
[0007]
【Example】
[Example 1]
First Embodiment A first embodiment will be described with reference to FIGS.
FIG. 2 shows a left side view of the table. The table has a pair of inverted T-shaped supporting legs 1 on both left and right sides, and a deck overturning type in which a deck 2 is provided on the supporting legs 1 via a rotating shaft 3. The deck 2 can be locked by a deck fixing device (not shown) between a horizontal position shown by a solid line in FIG. 2 and a folded position shown by a two-dot chain line in FIG. 2, and the other position is released by releasing the lock. Can be repositioned. A curtain plate 4 is attached to a front surface of the support leg 1, and a shelf plate 5 is attached to a lower surface of the deck 2.
[0008]
Reference is made to FIG. 1 showing an exploded perspective view of a main part of the table in addition to FIG. Each leg 1 comprises a lower portion 1a having a substantially inverted U-shaped cross section at the lower portion and a substantially elliptic cylindrical vertical portion 1b fixed vertically thereon. A height-adjustable adjuster 6 is screwed to the bottom at the front and rear ends of the horizontal portion 1a. The surface that is coplanar with the bottom surface of the adjuster 6 corresponds to the ground surface of the support leg 1 according to the present invention. On the upper end of the vertical portion 1b of the support leg 1, a deck mounting member 8 having a substantially double cylindrical shape is fitted externally and fixed by welding or the like.
[0009]
On the other hand, on the lower surface of the deck 2, a pair of left and right substantially channel-shaped deck receiving frames 9 are screwed. The deck receiving frame 9 is fitted to the deck mounting member 8 so as to straddle the deck mounting member 8 and is rotatably mounted by the rotary shaft 3.
[0010]
Next, the configuration of the main part will be described in detail with reference to FIGS. 1 and 2 and FIG. 3 showing a side sectional view of the support leg 1. An elevating caster 10 is provided in the support leg 1 so as to be vertically movable. The elevating caster 10 includes a horizontal mounting plate 10a that moves up and down in the horizontal portion 1a of the support leg 1, a vertical bar 10b that is vertically fixed on the horizontal mounting plate 10a, and screws on front and rear lower surfaces of the horizontal mounting plate 10a. And casters 11 before and after. The vertical bar 10b is loosely inserted into the through holes 12a, 13a of the bushes 12, 13 fitted and screwed in the upper and lower ends of the vertical portion 1b of the support leg 1.
[0011]
1 and 3, the caster 10 is moved up and down by a caster position switching mechanism 15 described below, and the lower end of the caster 11 protrudes and retracts on the grounding surface of the support leg 1. The caster position switching mechanism 15 has a link mechanism 16 incorporated in a space surrounded by the deck mounting member 8 and the deck receiving frame 9 as a main component.
[0012]
The link mechanism 16 includes an elevating body 16a coupled to the upper end of the vertical rod 10b of the elevating caster 10, a rotating link 16b fitted to the rotating shaft 3, an elevating body 16a and the rotating link 16b. It comprises a connecting link 16c connected by a first pin 17 and a second pin 18, respectively. More specifically, the turning link 16b and the turning shaft 3 are integrally turned by inserting a square shaft section having a square cross section provided on the turning shaft 3 into a square hole 19 formed in the turning link 16b. Move. As shown in FIG. 1, a square hole 20 a formed in the end surface of the cylindrical bearing member 20 is fitted into the tip of the square shaft portion of the rotating shaft 3. The round shaft portion of the rotating shaft 3 and the bearing member 20 are rotatably fitted in the shaft hole of the deck receiving frame 9, and can be rotated independently of the rotation of the deck 2. .
[0013]
When the link mechanism 16 is in the state shown by the solid line in FIG. 3, the elevating caster 10 is located at the lowered position, and the lower end of the caster 11 is in a movable state exposed below the ground surface of the support leg 1. In this movable state, when the rotating link 16b rotates about 90 ° clockwise together with the rotating shaft 3 as shown by a two-dot chain line in the same figure, it moves up and down via the connecting link 16c and the elevating body 16a. The caster 10 is switched to the raised position, and the lower end of the caster 11 is immobilized below the grounding surface of the support leg 1. From this immovable state, the rotating link 16b rotates about 90 ° in the counterclockwise direction in the figure together with the rotating shaft 3, and when the solid state shown in the figure is reached, the lifting caster 10 is switched to the lowered position as described above and becomes movable. .
[0014]
The support leg 1, the elevating caster 10, the link mechanism 16, and the like configured as described above are arranged symmetrically on both the left and right sides of the table, and therefore, the description of the right side portion is omitted.
[0015]
In FIG. 1, both ends of a cylindrical connecting shaft 21 are fitted and screwed to a bearing member 20 fitted to the left and right rotating shafts 3, respectively. A driven bevel gear 23 is fixed to the center of the connecting shaft 21.
On the other hand, a bracket 24 is screwed to the lower surface of the deck 2. A drive-side bevel gear 22 meshing with the driven-side bevel gear 23 is rotatably supported on the bracket 24 by a spindle screw 22a. An operation lever 25 is connected to the drive side bevel gear 22 coaxially with the spindle screw 22a, and the operation end of the operation lever 25 is directed toward the rear of the table, that is, toward the seat. As shown in FIG. 4, the peripheral portion of the operation lever 25 is shown in a plan view, and the operation lever 25 can be rotated within a range between a position indicated by a solid line and a position indicated by a two-dot chain line. The rotation range is set to, for example, about 80 to 85 °.
[0016]
As shown in FIG. 1, a lever shaft 27a of a fixing release lever 27 of a deck fixing device (not shown) is rotatably attached to a front end portion of the deck mounting member 8. The lever shaft 27a is connected to a connection shaft 29 via a bearing member 28, as in the case of the rotation shaft 3. A connecting piece 31 protrudes from the inner surface of each support leg 1, and both ends of a rectangular tube-shaped transverse member 32 are fitted to the connecting piece 31 of each support leg 1 and fastened with a bolt nut or the like. Have been.
[0017]
Next, the operation of the caster position switching mechanism 15 will be described with reference to the explanatory diagram of FIG. 5 (a) to 5 (c), the left half is shown in a schematic diagram corresponding to the left side surface of the support leg, and the right half is shown in a rear view of the deck, that is, a schematic diagram viewed from the seating side. is there.
As shown in FIG. 5A, in a state where the deck 2 is in the horizontal position and the operation lever 25 is in the movable position, the ascent / descent caster 10 is switched to the lowered position via the link mechanism 16 in the movable state. .
In the movable state, when the operation lever 25 is rotated to the left immobile position in FIG. 5A, the connection shaft 21 and the rotation shaft 3 rotate through the engagement of the bevel gears 22 and 23, and As a result, as shown in FIG. 5B, the elevating caster 10 is switched to the ascending position via the link mechanism 16 and becomes immobile. In the immobile state, if the operation lever 25 is rotated to the movable position, the up-and-down caster 10 is switched to the lowered position again as shown in FIG.
[0018]
Further, when the deck 2 is folded in the immobile state (see FIG. 5B), the connecting shaft 21 and the rotating shaft 3 rotate in conjunction with the rotation of the deck 2, and as a result, FIG. As shown in c), the elevating caster 10 is switched to the lowered position via the link mechanism 16 and becomes movable. More specifically, the operation end of the operation lever 25 is moved toward the immovable side (to the left in FIG. 5B) through the engagement rotation of the drive side bevel gear 22 with respect to the driven side bevel gear 23 by the folding rotation of the deck 2. Although the torque to be moved acts, a further rotation of the operation lever 25 is prevented by a stopper (not shown) for restricting the rotation range of the operation lever 25, so that the drive side bevel gear 22 and By rotating the connecting shaft 21 and the rotating shaft 3 simultaneously with the rotation of the driven bevel gear 23, the elevating caster 10 is switched to the lowered position as described above and becomes movable.
[0019]
When the deck 2 is turned to the horizontal position in the folded state of the deck 2 (see FIG. 5C), the operating lever 25 is engaged with the driven bevel gear 23 through the meshing rotation of the driven bevel gear 22 with respect to the driven bevel gear 23. A torque is applied to move the operation end toward the movable side (to the right in the figure), and the operation lever 25 is rotated to the movable position, but the link mechanism 16 is not operated, and thus the horizontal direction of the deck 2 is maintained. It becomes movable at the position (see FIG. 5A). At this time, the reason why the operation lever 25 rotates without operating the link mechanism 16 is that in order for the link mechanism 16 to operate from the solid line state to the two-dot chain line state in FIG. The second pin 18 located below the straight line L connecting the axes of the two must move upward of the straight line, requiring a large amount of torque as compared with the torque required for turning the operation lever 25. This is because the torque required for this operation acts as a force that does not rotate the rotating shaft 3.
[0020]
In the movable state (see FIG. 5A), when the deck 2 is folded, the operation lever 25 is rotated by the rotation of the deck 2 through the meshing rotation of the driven bevel gear 22 with respect to the driven bevel gear 23. Then, a torque is applied to move the operation end in the immobile direction (leftward in the figure), and the operation lever 25 rotates to the immobile position, but the link mechanism 16 is not operated, and thus the deck 2 is moved. It is folded and becomes movable (see FIG. 5C). Also in this case, the operation lever 25 rotates without operating the link mechanism 16 for the same reason as when the deck 2 rotates to the horizontal position.
[0021]
According to the above-mentioned table, it is possible to adjust the arrangement by making the deck 2 in a movable state by the caster position switching mechanism 15 while keeping the deck 2 in the horizontal position, and it is possible to immobilize the deck 2 by the switching mechanism 15 and to fix it. . Further, when the deck 2 is folded, a movable state is obtained in conjunction therewith, so that the storing operation can be easily performed.
Even if the deck is folded in the immovable state, the next time the deck 2 is turned to the horizontal position, the deck 2 becomes movable in conjunction therewith, so that the arrangement operation can be easily performed.
[0022]
[Example 2]
Example 2 will be described with reference to FIG. 6 showing a left side view of the table and FIG. 7 showing an exploded perspective view of the table. In this example, a part of the first embodiment is modified. Therefore, the modified part will be described in detail, and the parts that are considered to be the same as or equivalent to the first embodiment will be given the same reference numerals, and redundant description will be omitted. .
In this example, the operating lever 25 is integrally provided on the rotating shaft 3. By directly rotating the rotating shaft 3 by the operating lever 25, the lifting caster 10 can be moved up and down. It was done.
[0023]
The operation of the caster position switching mechanism 15 of the present example will be described with reference to the explanatory diagram of FIG. 8 shown in the same manner as FIG.
As shown in FIG. 8A, in a state where the deck 2 is in the horizontal position and the operation lever 25 is in the movable position in which the operation end is directed downward, the elevating caster 10 is lowered via the link mechanism 16. It is in the movable state switched to.
In the movable state, when the operation end of the operation lever 25 is rotated to the upper immobile position, the connection shaft 21 and the rotation shaft 3 are rotated, and as a result, as shown in FIG. The up-and-down caster 10 is switched to the ascending position via, and becomes immobile. In the immobile state, if the operation lever 25 is rotated to the movable position, the up-and-down caster 10 is switched to the lowered position again in the reverse order as shown in FIG.
[0024]
In the immobile state (see FIG. 8B), when the deck 2 is folded, the operation lever 25, the connecting shaft 21 and the rotating shaft 3 rotate in conjunction with the rotation of the deck 2, and As a result, as shown in FIG. 8C, the elevating caster 10 is switched to the lowered position via the link mechanism 16 and becomes movable.
When the deck 2 is turned to the horizontal position in the folded state of the deck 2 (see FIG. 8C), the deck 2 is movable in the horizontal position (see FIG. 8A). At this time, only the deck 2 rotates and the link mechanism 16 is not operated.
[0025]
When the deck 2 is folded in the movable state (see FIG. 8A), the deck 2 is folded and becomes movable (see FIG. 8C). In this case as well, the link mechanism 16 is not operated only by rotating the deck 2.
[0026]
According to the above table, the same operation and effect as those of the first embodiment can be obtained. Further, according to the present embodiment, the bevel gears 22 and 23 and the bracket 24 of the operation lever 25 in the first embodiment are eliminated, so that the number of parts can be reduced.
[0027]
【The invention's effect】
According to the table of the present invention, when the deck is in the horizontal position, the caster position switching mechanism is made movable so that the arrangement can be adjusted while the deck is kept horizontal. In addition, since the movable state can be obtained in conjunction with the folding of the deck, the storing operation can be easily performed.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a main part of a table according to a first embodiment.
FIG. 2 is a left side view of the table.
FIG. 3 is a side sectional view of a support leg.
FIG. 4 is an explanatory plan view showing a peripheral portion of an operation lever.
FIG. 5 is an operation explanatory view of a caster position switching mechanism.
FIG. 6 is a left side view of a table according to the second embodiment.
FIG. 7 is an exploded perspective view of a main part of the table.
FIG. 8 is an operation explanatory view of a caster position switching mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support 2 Deck 10 Elevating caster 11 Caster 15 Caster position switching mechanism

Claims (2)

In a deck overturning type table in which a deck is rotatably provided to a horizontal position and a folded position via a rotation shaft on a support leg,
An elevating caster having a caster that is provided on the support leg so as to be vertically movable and that protrudes and retracts on the ground surface of the support leg by the vertical movement thereof;
A caster position switching mechanism that switches the elevating caster between a lowered position and a raised position,
The caster position switching mechanism includes a link mechanism that links the rotating shaft and the elevating caster so that the elevating caster is moved up and down based on the rotation of the rotating shaft, and is capable of rotating the rotating shaft. With a simple operation lever,
The operation lever is provided so as to be switchable between a movable position where the elevating caster is at a lowered position and an immovable position at which the elevating caster is at a raised position in the horizontal position of the deck,
The link mechanism includes an elevating body coupled to the elevating caster, a rotatable link integrally rotatably coupled to the rotatable shaft, and a pin rotatably coupled to the elevating body and the rotatable link. And a connection link operably connected to the operation lever, which is operated at the time of a switching operation from a movable position to an immobile position to raise and lower the elevating caster from a lower position to an upper position, and from the immobile position of the operation lever. Activated at the time of the switching operation to the movable position to lower the elevating caster from the raised position to the lowered position, and also operate at the time of rotation of the deck from the horizontal position to the folded position when the elevating caster is at the raised position. Lowering the elevating caster to the lowered position, and rotating the deck from the horizontal position to the folded position when the elevating caster is in the lowered position; and It has a configuration which is not actuated upon rotation in the horizontal position from the Ritatami position
A table, characterized in that: The table according to claim 1,
The rotating shaft and the operating lever are connected to the rotating shaft, a driven bevel gear fixed on the connecting shaft, and rotatably supported on the deck, and A table connected to an operation lever and operatively linked to a drive side bevel gear meshing with the driven side bevel gear.

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