JPH1016505A - Furniture moving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely perform such operation as a caster, through which a lower base touches the ground, is pushed downward so as to float the lower base from the ground by operating a handle with foot, using weak force. SOLUTION: A leg part 5 has at its lower end a box-shaped lower base 4, which looks in the longitudinal direction and which opens downward. In addition, an arm 18, which looks in the longitudinal direction and on the undersurface of both forward and afterward ends of which are provided a pair of casters 19, is arranged within the lower base 4 in a freely movable manner in the vertical direction. Moreover, a toggle pin 20, which connects in a freely rotatable manner the lower part of an upper link 21, which is pivotally mounted onto a lateral pin 10 whose upper end is fixed within the leg part 5, to the upper part of a lower link 22, which is fixed to a lateral revolving shaft 24 whose lower end is pivotally mounted onto the intermediate part of the arm 18, is arranged within the leg part 5. Lastly, a handle 25 for expanding/ contracting the toggle link 20 in the vertical direction is prepared.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving device for moving furniture such as a connecting chair installed in a theater or a hall, a table installed in a conference room or the like as required. About.

[0002] In particular, the present invention provides a caster which is provided so as to be able to enter and exit below a lower base such as furniture, and projects the caster below a lower base landing on the floor so that the lower base can be moved from the floor. The present invention relates to a furniture and other moving device that floats and moves furniture and the like.

[0003]

2. Description of the Related Art In a theater, a hall, a conference room or the like, a movable connecting chair or a movable table is often installed so that the layout can be changed depending on the type of the event. As a device for moving these movable furniture, casters are provided on the legs of the furniture such as connecting chairs and tables so that the casters can enter and exit downward from a lower base that lands on the floor. The furniture is fixed on the floor by retracting it on the base and the lower base lands on the floor.When moving, the lower base is raised from the floor by projecting the casters below the lower base. For moving furniture and the like, for example, Japanese Patent Publication No. Sho 56-44422 and Japanese Patent Publication No. 62-20
921).

Japanese Utility Model Publication No. Sho 56-44422 discloses
The up and down moving member with the caster is moved up and down by a cam that works with the lever, and when moving, the caster is protruded downward from the base by the lever operation, and the base is lifted from the floor. .

[0005] Japanese Patent Publication No. Sho 62-20921 discloses
When the chair was lifted upward, the caster and the arm to which the caster was attached were lowered by its own weight, and the caster was projected downward from the base and lowered, and the restraining cam worked to maintain that lowered state. I have.

[0006]

However, since the overall weight of the connecting chair and the like is large, the cam described in Japanese Utility Model Publication No. Sho 56-44422 has a shape of a cam which is substantially parallel with different distances between parallel sides. While the lever is operated and the cam rotates and switches to a different side, the vertical movement member and the corner of the cam are in contact with each other. When used, the corners of the cam may be worn, and reliable switching may not be possible.

[0007] In the Japanese Patent Publication No. 62-20921, the connecting chair is heavy and the holding place is low.
There is a problem that it is difficult to lift and the workability is poor because the place where the hand is hung is not stable.

SUMMARY OF THE INVENTION An object of the present invention is to operate a handle with a foot to push a caster below a lower base that is landing on the floor, and to lift the lower base from the floor with a small force, easily, safely, and safely. It is an object of the present invention to provide a moving device for furniture and the like that can be surely performed.

[0009]

The present invention employs the following means in order to achieve the above object. (1) A caster provided on a leg portion of a furniture or the like, which can enter and exit downward, is projected downward from a ground contact portion of the leg portion so that the leg portion can be lifted off the floor and the furniture or the like can be moved. In a moving device for furniture or the like, the legs are
At the lower end thereof, an arm having a box-shaped lower base which faces in the front-rear direction and opens downward, and which faces in the front-rear direction and is provided with a pair of casters on the lower surface of both front and rear ends thereof, is attached to the lower base. And a lower end of an upper link pivotally attached to a left-right pin fixed in the leg, and a lower end pivotally attached to an intermediate portion of the arm. A toggle link, which is rotatably connected to an upper part of a lower link fixed to a horizontal rotation shaft, is disposed in the leg portion, and a handle for bending and extending the toggle link in a vertical direction is operated. By
The caster can be moved in and out of the lower base below the grounding portion.

(2) In the above item (1), a pair of guide rods are vertically suspended on the upper surface of the lower base, and the front and rear portions of the arm are penetrated by the guide rods. Are disposed in the lower base so as to be vertically movable.

(3) In the above item (1) or (2), when the toggle link including the upper link and the lower link is extended in the vertical direction by operating the steering wheel, the upper link and the lower link have a top dead center. By turning over to the opposite side in the front-rear direction and abutting against a stopper fixed to the lower base, it is possible to maintain the vertically extended state.

(4) In any one of the above items (1) to (3), the handle for bending and extending the toggle link in the vertical direction is attached to the rotary shaft fixing the lower end of the lower link of the toggle link. Fix it.

(5) In any one of the above items (1) to (4), the ground portion of the lower base is an adjuster whose height can be adjusted vertically.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a moving device for furniture or the like according to the present invention is implemented in a connecting chair having three seats will be described with reference to FIGS. 1 to 3, (1)
Is a connecting chair for three people, and is constituted by connecting three chairs alone (2) in a horizontal line, and below the left and right ends of the connecting chair (1), a hanging part (3) And a lower base (4) fixed to the lowermost end thereof are provided with two legs (5) (5).

Each chair alone (2) has a fixed backrest (6),
The seat 7 is provided so as to be able to stand up, and armrests 8 are provided on both sides thereof (only one armrest is provided between the chairs).

Inside each leg (5) is provided a moving device (9) according to the invention. The detailed structure of the moving device 9 will be described with reference to FIG.

The hanging part (3) is a hollow rectangular steel pipe, and has a pin (10) facing left and right and a stopper pin (1) inside.
1) is fixed.

The lower base (4) is formed in a box shape that faces in the front-rear direction and opens downward, and has a connection portion with the hanging portion (3). base
The internal space of (4) communicates with each other.

At the front and rear ends of the upper surface inside the lower base (4), guide rods provided with heads (12) and (12) at the lower end and a spring washer (13) having a buffering action wound thereon.
(14) (14) is provided vertically, and a substantially vertical slit (16) is provided in the center of the outer plate (15) of the lower base (4).
(17) are height-adjustable adjusters provided at two locations in front and behind the lower end of the lower base (4).

Reference numeral (18) denotes an arm made of a rectangular steel pipe and pointing in the front-rear direction. The guide rods (14), (14) are inserted into mounting holes (18a) provided at both front and rear ends and vertically penetrating therethrough. Accordingly, the lower base (4) is disposed so as to be vertically movable, and casters (19) (19) are attached to the front and rear surfaces of the lower surface.

Reference numeral (20) denotes a toggle link, which is an upper link (21) bent in a U-shape and two lower links (22) and (2).
2) is rotatably connected by a pin (23), and is disposed in the leg (3). The upper end of the upper link (21) is rotatably connected to the pin (10). Attached to.

The lower ends of the lower links (22) and (22) are connected to the arms (18).
Is fixed to a left-right rotating shaft (24) rotatably pivoted at an intermediate portion in the front-rear direction.

The rotating shaft (24) passes through the slit (16),
It extends outside the lower base (4) (left and right outward directions (see FIG. 1) when the connecting chair (1) is viewed from the front), and at its outer end,
A handle (25) for bending and extending the toggle link (20) in the vertical direction is fixed.

The handle (25) has a handle (26) extending back and forth from the rotary shaft (24), and two handles (27) that can be turned by stepping on both the front and rear. ) (28).

Next, the connected chair constructed as described above.
The operation of the moving device (9) (9) of (1) will be described. The state of FIG. 4 is a state where the connecting chair (1) is installed on the floor surface and can be used. That is, the caster (19) does not protrude below the adjuster (17), so that the adjuster (17) lands firmly on the floor, and fixes the connecting chair (1) so as not to move.

On the other hand, the state of FIG.
(1) is in a movable state. That is, casters (19)
(19) pops out below the adjuster (17) and the lower base
Since (4) is lifted off the floor, the casters (19) and (19) are in contact with the floor to support the weight of the connecting chair (1). Therefore,
When the two moving devices (9) and (9) at both ends of the connecting chair (1) are in this state, the connecting chair (1) can be moved by pushing or pulling.

4, the handle (25) is in a state where the front handle (27) is raised and the rear handle (28) is lowered. The lower link (22) (22) of the toggle link (20) is rotated via the rotary shaft (24) to which the handle (25) is connected, and the toggle link (20) is bent in the shape of Is contracted vertically.

The upper end of the upper link (21) of the toggle link (20) is held by a hanging part (3) via a pin (10), and the lower links (22) and (22) are vertically movable. Since the toggle link (20), which is fixed to the rotating shaft (24) held by the arm (18), contracts in the vertical direction, the arm (18) is moved through the rotating shaft (24).
You have lifted.

Since the casters (19) and (19) are attached to the arm (18), the casters (19) and (19) are also lifted up to be higher than the lower end of the adjuster (17), and ) Is in contact with the floor and supports the weight of the connecting chair (1).

When the foot is released from the handle (25), the arm (18)
Falls by its own weight, and the casters (19) and (19) come into contact with the floor, but do not support the weight of the connecting chair (1). It cannot be demonstrated.

Next, an operation method for changing the installation state shown in FIG. 4 to a movable state will be considered. In the state shown in FIG. 4, the user puts his / her foot on the handle (27) on the front side of the handle (25) and turns the handle (25) downward on the front side. As a result, the lower links (22) and (22) of the toggle link (20) also rotate in the same direction via the rotation shaft (24), that is, counterclockwise in the drawing.

In this case, the distance between the center of the rotating shaft (24) serving as a fulcrum of rotation and the handle (27) and the pin (23) (the upper link (21) and the lower link (22) (22) are connected) The distance to the pin (which is a pin) is much smaller as is apparent from the figure, so that the stepping force generates a larger force to rotate the pin (23). Lateral force as a component of the force to rotate the pin (23) (toggle link (2
The intermediate connection portion (0) (lateral force applied to the pin (23)) also increases.

According to the principle of the toggle link mechanism,
The lateral force on the pin (23) creates a greater force to extend the toggle link (20) in the vertical direction.
The force to extend the toggle link (20) in the vertical direction is the upper link
The opening angle between (21) and the lower links (22) and (22) increases,
The closer to 80 °, the larger.

As a result, the toggle link (20) lowers the arm (18) via the rotating shaft (24), and the caster (19)
After (19) comes into contact with the floor, the weight of the connecting chair (1) (strictly speaking, since the connecting chair (1) has two moving devices on the left and right, the force applied to one moving device) Is about half the weight of the connecting chair (1).), The connecting chair (1) is lifted, and the adjuster (17) is lifted off the floor.

When the handle (25) is fully rotated, the rotation of the toggle link (20) reaches the top dead center (the opening angle between the upper link (21) and the lower links (22), (22)). The arm (18) continues to descend while receiving resistance from the spring washer (13) when the top dead center is exceeded.
(22) When (22) abuts against a stopper pin (11) provided on the hanging part (3), the rotation of the handle (25) and the toggle link (20) and the lowering of the arm (18) are prevented. (State of FIG. 5).

In this state, even if the foot is released from the handle (27),
Since the toggle link (20) has already rotated past the top dead center, the toggle link (20) does not return even if the weight of the connecting chair (1) tries to shrink the toggle link (20) in the vertical direction. The state where the casters (19) and (19) lift the connecting chair (1) is maintained.

For one moving device (9), a connecting chair
After lifting (1) and making it movable, the same operation is performed on the other moving device (9), and if it is made movable, the whole connected chair (1) can be moved. it can.

Next, consider an operation in which after the connecting chair (1) is moved, the connecting chair (1) is placed on the floor so as not to move without permission. In the state of FIG. 5, the handle (27) (2) of the handle (25)
Step 8). In this case, the toe of the foot is put on the handle (28), and the heel of the foot is put on the front handle (27). Then, a force is applied to the handle (28) with the toe of the foot to rotate the handle (25) in the clockwise direction in the figure.

The rotation of the handle (25) is performed by rotating the lower links (22) and (22) of the toggle link (20) in the same direction (the direction of separating the lower link (22)) from the stopper pin (11) via the rotation shaft (24). Rotate.
Since the toggle link (20) crosses over the top dead center and starts to bend in a U-shape, that is, it contracts in the vertical direction, the arm (18)
Moves upward with respect to the lower base (4) and casters (19)
(19) will be withdrawn. Conversely, the lifted connecting chair (2) begins to fall toward the floor,
Eventually, the floating adjuster (17) lands on the floor, supporting the weight of the connecting chair (1), and becomes fixed (the state of FIG. 4).

It should be noted here that the toggle link
After (20) exceeds the top dead center, the toggle link (20) shrinks only by the weight of the connecting chair (1). For this purpose, turn the handle (25) clockwise while holding down the handle (27) on the front side of the handle (25) with the heel of your foot to apply the brakes so that the connecting chair (1) does not drop to the floor. Need to be moved.

The connecting chair embodying the present invention described above.
Since the moving device (9) of (1) uses a toggle link mechanism that bends and expands in the vertical direction, the connecting chair (1) is easily, easily and securely lifted by the force of the foot to make it movable. Or can be placed in the installed state.

Also, since the arm (18) and the toggle link (20) are housed inside the leg (5), the user's feet and the like are not caught between them, which is safe. is there.

As a structure for holding the arm (18) having the casters (19) and (19) on the lower base (4) so as to be movable up and down,
Since the guide rods (14) and (14) are used, the structure is simple. However, the present invention is not limited to this structure.

The handle (25) for bending and extending the toggle link (20) in the vertical direction is fixed to the rotating shaft (24) fixing the lower end of the lower link (22). This has the effect of reducing the size and making the device compact.

[0045]

According to the present invention, the following effects can be obtained. (a) Since the toggle link mechanism that bends and expands in the vertical direction is used, it is possible to easily, easily, and securely lift furniture such as a connected chair or a table and put it in a movable state or put it in an installed state with the force of feet. it can.

(B) Since the arm and the toggle link are housed inside the legs, the feet and the like of the user are not caught between them, which is safe (claim 1).

(C) According to the second aspect of the present invention, the front and rear movements of the arm are guided by passing the two front and rear portions of the arm through the guide rod, so that the vertical movement of the arm is stabilized.

(D) According to the third aspect of the present invention, the moving device is maintained so that the caster is located below the ground contact portion of the leg even if the handle is not pressed with the foot or the like. Easy to use.

(E) According to the fourth aspect of the present invention, the number of parts is reduced by devising a handle mounting structure for bending and extending the toggle link in the vertical direction.
The structure can be simplified and the device can be made compact.

(F) According to the fifth aspect of the invention, the height of furniture or the like can be adjusted.

[Brief description of the drawings]

FIG. 1 is a front view of an articulated chair provided with an embodiment of the present invention.
(One chair on the left is in a standing position).

FIG. 2 is a side view showing a state where the connecting chair provided with the embodiment of the present invention shown in FIG. 1 is installed on the floor.

FIG. 3 is a side view showing a movable state of the connecting chair shown in FIG. 1;

FIG. 4 is a side view showing a state where the chair is installed on a floor of a main part of the connection chair shown in FIG.

5 is a side view showing a movable state of a main part of the connection chair shown in FIG. 1;

6 is a cross-sectional plan view of a main part of the connection chair shown in FIG. 1;

FIG. 7 is a sectional view taken along line AA of FIG. 4;

[Explanation of symbols]

 (1) Connecting chair (2) Chair alone (3) Hanging part (4) Lower base (5) Leg (6) Backrest (7) Seat (8) Armrest (9) Moving device (10) Pin (11) Stopper Pin (12) Head (13) Spring washer (14) Guide rod (15) Outer plate (16) Slit (17) Adjuster (18) Arm (18a) Mounting hole (19) Caster (20) Toggle link (21) Upper link (22) Lower link (23) Pin (24) Rotary axis (25) Handle (26) Handle (27) (28) Handle

Claims (5)

[Claims] 1. A caster provided on a leg portion of furniture or the like, which can enter and exit downward, protrudes downward from a ground contact portion of the leg portion, thereby lifting the leg portion from the floor and moving the furniture or the like. In a moving device for furniture or the like, the legs are directed to the lower end thereof in the front-rear direction,
An arm having a box-shaped lower base that opens downward, facing in the front-rear direction, and provided with a pair of casters on the lower surface of both front and rear ends thereof, is disposed inside the lower base so as to be vertically movable, And the lower end of the upper link, the lower end of which is pivotally attached to the left and right pins fixed in the legs, and the lower end,
A toggle link rotatably connected to an upper portion of a lower link fixed to a left-right rotation shaft pivotally attached to an intermediate portion of the arm is disposed in the leg, and the toggle link is vertically moved. A moving device for furniture and the like, wherein a caster can be moved in and out of a lower portion of a ground contact portion of a lower base by operating a handle for bending and extending operation. 2. A pair of guide rods are vertically suspended on the upper surface of a lower base while being spaced apart from each other, and the front and rear portions of the arm are passed through the guide rod, and the arm is moved up and down into the lower base. The moving device for furniture or the like according to claim 1, wherein the moving device is arranged freely. 3. A toggle link comprising an upper link and a lower link, when the handle is operated in a vertical direction by operating a handle, the upper link and the lower link rotate past the top dead center to the opposite side in the front-rear direction, and The moving device for furniture or the like according to claim 1 or 2, wherein a state in which the stopper is fixed to the base can be maintained in a vertically extended state by contacting the stopper. 4. A handle for bending and extending the toggle link in a vertical direction is fixed to a rotating shaft fixing a lower end of a lower link of the toggle link. A moving device such as furniture according to any one of the above. 5. The moving device for furniture or the like according to claim 1, wherein the ground portion of the lower base is an adjuster whose height can be adjusted vertically.