JP3796471B2 - Table, chair and bed with caster support mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is table with casters supporting mechanism for supporting the key Yasuta relates chairs and couch.
[0002]
[Prior art]
Conventionally, some conference and work tables are provided with casters so that they can be moved easily. Some of these tables use a known caster with a lock mechanism in order to fix the table at a predetermined position.
[0003]
The lock mechanism restricts the rotation of the wheel by operating the lever to place the table in a fixed state, and allows the wheel to rotate by operating the lever to release the fixed state of the table.
[0004]
In addition, there is an apparatus in which the table is switched between a fixed state and an unfixed state by an adjuster device provided on a leg portion for each caster. (For example, refer to Patent Document 1.)
[0005]
[Patent Document 1]
Japanese Patent No. 3012502 [0006]
[Problems to be solved by the invention]
However, in the case of a table provided with casters with a lock mechanism, it is necessary to operate the lock mechanism for each caster, and there is a problem that the table cannot be easily switched between a fixed state and an unfixed state.
[0007]
In the case of a table provided with an adjuster device, it is necessary to operate the adjuster device for each caster.
The present invention has been made in order to solve the above-described problems, and the object of the present invention is to provide a non-fixed state in which a supported body provided with casters can be moved by a caster and a fixed state in which the caster cannot be moved. table with casters supporting Organization that allows for switching between a state more easily, and to provide a chair and a bed.
[0008]
[Means for Solving the Problems]
To solve the above problems, a first aspect of the present invention, a pair of right and left round the support and the supported body, the caster while being rotatably supported by the upper and lower direction relative to the leg portion of the supported member A movable arm , a connecting rod connected to both the rotating arms, and the both rotating arms are rotated up and down by a manual lifting operation of the supported body, and the support portion of the caster The caster can be switched between a non-use position for supporting the supported body and a use position for the caster to support the supported body, and the caster is urged and not used when the supported body is lifted manually. The urging means for moving from the position to the use position and the support position of the caster is switched from the use position to the non-use position against the urging force of the urging means in the manually lifted state of the supported body. The caster support mechanism consisting of a capacity of depression means and summarized in that provided in the front and rear of the leg.
[0009]
According to the invention described in claim 1, in the fixed state in which the support is supported on the floor by the legs, when lifting the end portion of the supported member by manually rotating the leg portion of the support rotatably supported by a pair of pivot arms are pivoted by the biasing force of the biasing means, a pair of casters ing and non-fixed state is switched to the use position from the non-use position. In this state, when the stepping operation means is operated with the end of the supported body being manually lifted, the caster switches from the use position to the non-use position against the urging force of the urging means. is Ru.
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, the operating means is a caster housing pedal provided on the leg portion so as to be pivotable in the vertical direction. In this state, the pedal that has been stepped on rotates both the rotating arms via a connecting rod so that both casters are switched from the use position to the non-use position .
[0012]
The invention according to claim 3, in the invention of claim 1 or claim 2, wherein the caster is in the non-use position, the at least half of the portion is stored in the interior of the leg portion Rukoto Features.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIGS. 1A and 1B, the table (supported body) 10 includes a top plate 11, a column 12, and a leg base (leg portion) 13.
[0021]
The top plate 11 is formed in a substantially rectangular shape. The support column 12 is formed in an octagonal column shape, and its upper end is fixed to the center of the lower surface of the top plate 11.
As shown in FIG. 2, the leg base 13 includes a substantially rectangular central portion 13a and a pair of side portions 13b provided on both sides of the central portion 13a. The lower end of the support column 12 is fixed at the center of the upper surface of the central portion 13a.
[0022]
Each side portion 13 b is provided with an adjuster (height adjuster) 14 at each position corresponding to each corner of the top plate 11.
The adjuster 14 is a known height adjuster, and supports the table 10 with respect to the floor F at four locations. The adjuster 14 supports the table 10 in an unmovable state.
[0023]
Note that the height of the top plate 11 can be adjusted by a lifting mechanism (not shown) provided in the column 12.
As shown in FIG. 1B and FIG. 3, four casters 15 are built in the leg base 13. Each caster 15 is provided to correspond to each adjuster 14. Each caster 15 is stored inside the side portion 13b when not in use, and the four adjusters 14 are grounded to the floor surface F. At this time, the table 10 is in a fixed state where it cannot be moved by the casters 15.
[0024]
In addition, as shown in FIGS. 1A and 4, each caster 15 is disposed below the footrest 13 and floats the adjuster 14 from the floor surface F to place the table 10 at the four locations on the floor surface F. Support on top. At this time, the table 10 is in a non-fixed state that can be moved by the casters 15.
[0025]
As shown in FIG. 5A, FIG. 6A, and FIG. 7A, each caster 15 is supported by a caster support mechanism 16 with respect to the table 10, respectively.
[0026]
The caster support mechanism 16 can switch the support position of the caster 15 between a storage position (non-use position) shown in FIG. 5A and a use position shown in FIG. In the retracted position, the caster 15 is not grounded to the floor surface F, and the grounding surface 14 a of the adjuster 14 is grounded to the floor surface F. In the use position, the caster 15 is grounded to the floor surface F, and the grounding surface 14a of the adjuster 14 is not grounded to the floor surface F. That is, the table 10 is in a fixed state when each caster 15 is in the storage position, and the table 10 is in an unfixed state when the caster 15 is in the use position.
[0027]
As shown in FIGS. 3 and 4, the caster support mechanism 16 is provided inside the side portion 13 b. The side part 13b is comprised from the upper board 17, the side board 18, the reinforcement rib 19, etc., and the lower surface is open | released. Two caster support mechanisms 16 are provided on each side portion 13b.
[0028]
The caster support mechanism 16 includes a pair of support members 20a and 20b, a rotation shaft 21 rotatably supported by both the support members 20a and 20b, and a rotation arm 22 fixed to the rotation shaft 21. ing.
[0029]
Both supporting members 20a and 20b are fixed in a state where they abut against the lower surface 17a of the upper plate 17 and the inner surface of the side plate 18.
As shown in FIGS. 5 (a), 6 (a) and 7 (a), the pivot shaft 21 has a central axis closer to the lower surface 17a of the upper plate 17 than the lower end of the side portion 13b. It is provided at the position where it is located.
[0030]
The rotating arm 22 includes a first arm portion 22a and a second arm portion 22b connected in an “L” shape. The end of the first arm portion 22a is fixed to the rotating shaft 21, and the second arm portion 22b. A caster 15 is fixed to the end portion of the. The rotating arm 22 is fixed to the rotating shaft 21 so that the second arm portion 22b extends from the end of the first arm portion 22a to the inside of the side portion 13b.
[0031]
The caster 15 includes a support portion 15a that is rotatably fixed to the rotating arm 22, a bearing portion 15b that is integrated with the support portion 15a, and a pair of wheels 15c that are rotatably supported by the bearing portion 15b. I have. The caster 15 is supported with respect to the rotation shaft 21 so that the rotation axis of the support portion 15 a is orthogonal to the center axis of the rotation shaft 21.
[0032]
As shown in FIG. 5 (a), when the rotary arm 22 is in the retracted position, the second arm portion 22b faces obliquely upward toward the inside of the side portion 13b. The caster 15 is supported so as to be higher than the ground contact surface 14 a of the adjuster 14. The caster 15 is positioned when the wheel 15 c comes into contact with the lower surface 17 a of the upper plate 17 in the retracted position. In addition, the caster 15 is in a state where almost the entire caster 15 is stored inside the side portion 13b.
[0033]
Further, as shown in FIG. 6A, when the rotary arm 22 is in the use position, the lower end of the wheel 15c is lower than the ground contact surface 14a of the adjuster 14 by making the second arm portion 22b substantially vertical. Thus, the caster 15 is supported. The caster 15 is positioned in the use position by the first arm portion 22a of the rotating arm 22 coming into contact with the contact plate 27 fixed to the lower surface 17a of the upper plate 17 in a substantially horizontal state.
[0034]
As shown in FIGS. 3 and 4, two left and right caster support mechanisms 16 located on the long side are connected to the opposing long sides of the table 10, and the support positions of the left and right casters 15 are connected. A stepping shaft (connecting rod) 23 for switching between the storage position and the use position is provided.
[0035]
The step-down shaft 23 is provided to connect the rotating arms 22 of the two caster support mechanisms 16 and rotate both the rotating arms 22 in the same state. Each end of the stepping shaft 23 is fixed to a connecting portion between the first arm portion 22 a and the second arm portion 22 b with respect to the rotating arm 22. One end of a tension coil spring (biasing means) 24 provided for each caster support mechanism 16 is connected to the stepping shaft 23.
[0036]
As shown in FIGS. 5A, 6A and 7A, one end of the tension coil spring 24 is locked to a locking shaft 25 fixed to the lower surface 17a of the upper plate 17. The other end is locked to the stepping shaft 23. The locking shaft 25 is provided on the outer side of the side portion 13 b with respect to the rotation shaft 21.
[0037]
The tension coil spring 24 provided in this way urges the rotation shaft 21 outward, and rotates the rotation arm 22 so that the caster 15 moves to the use position side.
[0038]
Further, as shown in FIG. 5A, when the caster 15 is in the retracted position, the stepping shaft 23 is arranged below the central portion 13a as shown in FIG. 5B. Further, as shown in FIG. 6A, when the caster 15 is in the use position, the stepping shaft 23 is arranged outside the central portion 13a as shown in FIG. 6B. .
[0039]
As shown in FIG. 2, caster accommodation pedals 26 as operation means are provided on the respective side portions of the central portion 13 a corresponding to both long sides of the top plate 11 .
[0040]
As shown in FIGS. 3, 4, 5 (b), 6 (b), and 7 (b), the caster accommodation pedal 26 is connected to the central portion 13 a so as to be rotatable. And a pedal portion 26b supported by the connecting portion 26a. The pedal portion 26b is fixed to the connecting portion 26a on the back side of the lower surface, and a stepping surface 26c is provided on the front side of the upper surface.
[0041]
As shown in FIG. 5A, when the caster 15 is in the retracted position, the caster accommodating pedal 26 has the upper surface of the central portion 13a in contact with the lower surface of the pedal portion 26b as shown in FIG. 5B. The rotation is restricted, and the stepping surface 26c becomes a stepping position in which the stepping surface 26c faces obliquely upward toward the outside of the top plate 11.
[0042]
On the other hand, as shown in FIG. 6 (a), when the caster 15 is in the use position, the caster accommodating pedal 26 has a stepping shaft 23 that contacts the lower surface of the pedal portion 26b as shown in FIG. 6 (b). In contact with each other, the stepping surface 26c becomes an initial position that is substantially horizontal.
[0043]
Further, when the caster housing pedal 26 is depressed while the caster 15 is in the use position, the caster 15 is moved downward as shown by the arrow G in FIG. The left and right pivot arms 22 are pivoted down. 7 (a) and 7 (b), when the caster accommodating pedal 26 is depressed to the depressed position, the rotation axis H of the wheel 15c is on the side of the center axis I of the rotation shaft 21. The caster 15 is disposed at a retractable position disposed inside the portion 13b. The caster 15 supported at the retractable position moves from the retractable position to the retracted position side by being pressed against the floor surface F as the table 10 is lowered. Then, as shown in FIG. 5A, the caster 15 is in the storage position when the table 10 is completely lowered, and puts the table 10 in a fixed state.
[0044]
Next, the operation of the present embodiment configured as described above will be described.
In order to change the table 10 from the fixed state to the non-fixed state, first, as shown in FIG. 8, the user S moves the end of one of the long sides of the top plate 11 on the long side. Lift up.
[0045]
Then, as shown by an arrow J in FIG. 5A, the left and right casters 15 on the long side are rotated downward from the retracted position by the urging force of the tension coil spring 24 and its own weight.
[0046]
Here, when the end of the top plate 11 is lifted until the caster 15 that has moved downward does not come into contact with the floor surface F, as shown by the arrow K in FIG. The caster 15 rotates beyond the retractable position to the use position side.
[0047]
When the end of the top plate 11 is lowered from this state, as shown in FIG. 6A, the wheel 15c comes into contact with the floor surface F, and the caster 15 is disposed at the use position.
Then, among the two long sides of the top plate 11, lifting the end portion of the other long side, similarly, it switches the position of use the left and right caster 15 of the long side from the storage position.
[0048]
As a result, the table 10 in the fixed state is in the non-fixed state supported by the four casters 15.
In order to change the table 10 from the non-fixed state to the fixed state, first, as shown in FIG. 9, the user S puts the end of the top plate 11 with one foot T placed on the caster accommodating pedal 26. Lift the part. At this time, the toes are placed on the caster accommodation pedal 26 with the heel of the foot T attached to the floor F as a fulcrum.
[0049]
Then, since the end of the top plate 11 is lifted while the stepping shaft 23 is pressed by the caster accommodation pedal 26, the left and right turning arms 22 are turned, as shown by an arrow L in FIG. In addition, the left and right casters 15 on the long side are rotated from the use position to the retracted position side against the urging force of the two tension coil springs 24.
[0050]
Further, when the end of the top plate 11 is lifted, the caster accommodation pedal 26 is depressed to the depressed position as shown in FIG. 7 (b), and as shown in FIG. Arranged at a retractable position.
[0051]
From this state, when the end of the top plate 11 is lowered while the caster accommodating pedal 26 is depressed, the left and right casters 15 disposed at the retractable position are grounded to the floor surface F, and FIG. As indicated by an arrow M in a), the storage position moves to the storage position side.
[0052]
When the left and right adjusters 14 come into contact with the floor surface F, as shown in FIG. 5A, the left and right casters 15 are arranged at the storage position.
Next, the end of the top plate 11 is lifted with the toes placed on the caster accommodating pedals 26 on the other long side of the top plate 11, and the left and right casters 15 are similarly connected. Switch from the use position to the storage position.
[0053]
As a result, the non-fixed table 10 is in a fixed state supported by the four adjusters 14.
Next, effects of the present embodiment described in detail above will be listed.
[0054]
(1) When the rotating arm 22 supported so as to be rotatable with respect to the table (supported body) 10 is manually rotated and the caster 15 is supported at the non-use position, the table 10 becomes a leg base (leg portion). ) Is in a fixed state supported by 13. Further, when the rotating arm 22 is rotated and the caster 15 is supported at the use position, the table 10 is in an unfixed state in which the table 10 is supported by the caster 15. When the rotating arms 22 of the left and right casters 15 provided on one of the long sides of the top plate 11 are simultaneously rotated by manual operation, the support positions of the casters 15 on both the left and right sides are the use position and the non-use position. Switch at the same position in use.
[0055]
As a result, it is possible to more easily switch between a non-fixed state in which the caster 15 can move and a fixed state in which the caster 15 does not work.
(2) lifting the end of the top plate 11 of the caster receptacles pedal 2 6 standstill state, it is actuated stepping axis (communicating Yuibo) 23, pivot arm 22 of the left and right caster support mechanism 16 is simultaneously times Is operated. Then, the support positions of the left and right casters 15 are switched from the use position to the storage position (non-use position). Therefore, the supporting position of the caster 15 can be switched by stepping on the caster accommodation pedal 26 with the foot T while lifting the top plate 11 by hand.
[0056]
For this reason, compared with the case where the operation of lifting the top plate 11 and the operation of rotating both the left and right rotating arms 22 are both performed by hand, the switching from the non-fixed state to the fixed state can be performed more simply. Can do.
[0057]
(3) Since the tension coil spring (biasing means) 24 urges the caster 15 to move to the use position side, the end of the top plate 11 is lifted so that the caster 15 does not contact the floor surface F. If the movement is not restricted, switching from the storage position to the use position is automatically performed. Therefore, switching from the fixed state to the non-fixed state can be performed more easily.
[0058]
(4) The caster support mechanism 16 places the caster 15 below the adjuster 14 to be in the use position, so that the table 10 is in an unfixed state, and is placed above the adjuster 14 to be in the storage position. Thus, the table 10 is in a fixed state. For this reason, when the table 10 is in a fixed state, the height of the leg base 13 is lowered. Therefore, the leg stand 13 does not interfere with the foot pedal of the wheelchair when used in a wheelchair, and the table 10 can be sufficiently approached to the top plate 11 while being in the wheelchair.
[0059]
Moreover, since the top plate 11 is supported by the center of the upper surface of the flat footrest 13 by the single support column 12 that supports the center of the lower surface, there is nothing that interferes with the wheelchair. For this reason, since it can approach from the top plate 11 from any direction, it becomes more convenient.
[0060]
(5) When switching the table 10 from the non-fixed state to the fixed state, when only the left and right casters 15 on either long side of the top plate 11 are switched from the use position to the storage position, the top plate 11 Will be tilted. For this reason, it becomes obvious at a glance that all four casters 15 are not in the storage position and the table 10 is not in a fixed state.
[0061]
On the other hand, in the case of a table having a conventional caster with a lock mechanism, the lever for operating the lock mechanism is small, and the lever is near the floor surface F away from the user's line of sight. It is difficult to determine whether it is locked or unlocked. For this reason, although the lock mechanisms of all four casters are not in the locked state, the table may be mistaken for the fixed state. In this case, for example, when an elderly person tries to stand up on the table top or walks around, the table that is not completely fixed may move unexpectedly.
[0062]
On the other hand, in the present embodiment, although the table 10 is seemingly fixed, there is no case where the table 10 is not completely fixed.
(6) When the caster 15 is in the storage position, almost the entire caster 15 is stored in the leg base 13. For this reason, it looks good when the table 10 is in a fixed state.
[0063]
Next, embodiments other than the one embodiment will be listed.
[0066]
In the embodiment, each side portion 13b has a portion of the upper plate 17 opened, and the upper portion of the caster 15 in the storage position (non-use position) is higher than the upper surface of the upper plate 17 from the opening. It is good also as composition which becomes.
[0067]
The present invention is not limited to the table 10 provided with the substantially rectangular top plate 11, and may be implemented on a table provided with a top plate such as an ellipse, a circle, or a triangle.
The present invention is not limited to the table caster support mechanism, and may be implemented in, for example, a chair caster support mechanism or a bed caster support mechanism.
[0071]
【The invention's effect】
According to the first aspect of the present invention, it is possible to more easily switch between a non-fixed state in which the supported body provided with the casters can be moved by the casters and a fixed state in which the casters cannot be moved. It becomes possible.
[0072]
According to the second aspect of the present invention, in the state in which the supported body is lifted manually, the both rotating arms are rotated via the connecting rod by the pedal that has been stepped on, and the two casters are moved away from the use position. It can be easily switched to the use position.
According to invention of Claim 3 , the appearance of the table in a fixed state improves.
[Brief description of the drawings]
FIGS. 1A and 1B are schematic side views showing a table of this embodiment.
FIG. 2 is also a schematic plan view.
FIG. 3 is a schematic bottom view of the same.
FIG. 4 is a schematic bottom view of the same.
5A is a schematic side view showing a caster support mechanism, and FIG. 5B is a schematic side view showing a caster accommodation pedal.
6A is a schematic side view showing a caster support mechanism, and FIG. 6B is a schematic side view showing a caster accommodation pedal.
7A is a schematic side view showing a caster support mechanism, and FIG. 7B is a schematic side view showing a caster accommodation pedal.
FIG. 8 is a schematic side view of a table showing a use state.
FIG. 9 is a schematic side view of the table.
[Explanation of symbols]
10 ... as the supported body table, 11 ... top plate, 13 ... isosceles as legs, 15 ... caster, 16 ... caster support mechanism, 22 ... pivot arm depression axis as 23 ... communicating Yuibo, 24 ... extension coil spring as biasing means, key Yasuta accommodating pedal as 26 ... depression means.

Claims (3)

A supported body;
A pair of right and left pivot arm supporting the caster while being rotatably supported respectively in a vertical direction with respect to the leg portion of the supported member,
A connecting rod connected to the pivot arm;
Both the rotating arms are rotated up and down by a manual lifting operation of the supported body, the support position of the caster, the non-use position where the leg portion supports the supported body, and the caster the supported body. Switchable to the use position to support ,
An urging means for urging the caster to move it from a non-use position to a use position in a state where the supported body is lifted manually;
A caster support mechanism comprising a stepping operation means capable of switching the support position of the caster from the use position to the non-use position against the urging force of the urging means in a state in which the supported body is lifted manually. A table, a chair, and a bed provided with a caster support mechanism, which are provided before and after the legs . The operating means is a caster-accommodating pedal provided on the leg portion so as to be capable of rotating in the vertical direction, and when the supported body is lifted manually, the pedal that is stepped on is operated via a connecting rod. The table, chair and bed provided with a caster support mechanism according to claim 1, wherein both the pivot arms are pivoted to switch both casters from the use position to the non-use position. 3. The table, chair, and bed provided with a caster support mechanism according to claim 1, wherein at least half of the caster is stored in the leg in the non-use position. 4. .

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