JPH048603A - Moving body with caster - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to moving objects with casters, such as tables and chairs.

(Conventional technology) In order to make the connected chairs used in large tables and halls easy to move and to ensure stable installation, casters are used to make them movable, and sometimes they are installed on the legs. There is one that allows you to set it directly in contact with the floor.

Connected chairs are often used in theater halls and the like, but in halls used for multiple purposes, the arrangement of the chairs is often changed. In such a case, according to the above-mentioned connected chair, when moving, the casters can be taken out from the legs and run on the floor, and when installing the chair, the legs can be set in contact with the floor at the place where the chair is placed. Replacement can be done easily.

Tables, chairs, etc. that are configured to be easily moved and installed in this way include those that have casters attached to a frame in contact with the floor so that they can be moved up and down, and that can be moved and installed by operating the casters up and down, or A frame that supports the leg support is housed in the leg and is always in contact with the floor, and when the table or chair is lifted, the frame rises relatively and the casters come into contact with the floor, making it possible to move. and so on.

(Problem to be solved by the invention) However, in conventional moving devices for tables, chairs, etc., levers and handles must be manually operated when the casters are taken out from the legs, so it is difficult to operate the casters by hand. There is a danger when handling it as it may get caught.
Furthermore, if casters are simply attached to the frame so that they can be raised and lowered, there are problems in that handling is cumbersome and the caster attachment has weak strength at the position.

In addition, when a table or chair is lifted up to make it run, it is less reliable to set it to the running state, the casters are always exposed, which makes it unsightly, and the casters can cause noises caused by feet hitting the casters. There are problems with this, such as the fact that it can cause problems and be dangerous.

Therefore, the present invention has been made to solve the above-mentioned problems, and has the following objectives: 1. It is possible to quickly handle the vehicle without operating a lever or handle, and to ensure that the vehicle is in a running state. The purpose of the installation is to provide moving objects with casters, such as tables and chairs, that can be stably installed in a certain position.

(Means for solving problems) The present invention has the following configuration to achieve the above object.

That is, a leg having a grounding part, a caster rotatably supported by the leg in a vertical plane so as to project downwardly from the grounding part via an arm member, and a link mechanism linking the arm members. Through the link mechanism and the arm member, when the ground contact part of the leg is always in contact with the floor surface, the caster is biased in a direction to press against the floor surface, and when the table, chair, etc. is lifted, the ground contact part of the leg is pressed against the floor surface. a biasing means for urging the caster to protrude downward from the grounding part when the caster is lifted from the floor; a locking means for locking the movable part at a position where the caster protrudes below the grounding part; and the locking means. The present invention is characterized in that a lock release means for releasing the lock by the means is provided.

Further, the link mechanism pivotally supports a rotating plate on a side surface of the leg, and links each end of the rotating plate to a position offset from a support axis of the arm member for the leg, A link plate is provided for swinging both the arm members inwardly or both outwardly in accordance with the rotation of the rotary plate, and the link mechanism includes a One end is pivotally supported at a position offset from the support shaft relative to the leg, and the other end is linked to each other by a support shaft pin, and the support shaft pin is provided to be movable up and down within a predetermined range in the vertical direction, so that the support shaft pin can be moved up and down. It is characterized by being provided with a link plate that allows the arm members to swing both inwardly or outwardly in accordance with the movement of the arm members.

(Function) In the installed state, the casters are always urged in a direction to press the floor surface by the urging means, and are housed without protruding downward from the ground contact part due to the weight of the table, chair, etc. When the legs are lifted, the casters protrude downward from the ground contact part due to the biasing force of the biasing means, and are locked in the protruding state by the locking means so as not to be drawn into the membrane by the weight of the chair, etc., and enter the running state. When the lock is released by the lock release means at the installation position, the casters are pulled in by the weight of the chair, etc., and the installation is in the installation position.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[First Embodiment] FIGS. 1 and 2 are explanatory diagrams showing a first embodiment of a moving body with casters according to the present invention. Figure 1 shows the floor surface 10.
Fig. 2 shows the running condition.

The main body of the table or connected chair is supported by leg supports 12. A fixed frame 14 for supporting the leg support 12 is installed horizontally at the lower end of the leg support 12 in contact with the floor surface. Fixing metal fittings 16 for fixing the fixed frame 14 on the floor are provided on the front and lower surfaces of the fixed frame 14, and the fixing metal fittings 16 have insertion holes 18 for inserting fixing bolts for fixed installation.
will be established.

Reference numeral 20 denotes a frame provided to surround the upper and outer surfaces of the fixed frame 14. Frame 20 is leg support 1
An adjuster 22 for adjusting the height is provided on the lower surface of the front Mt of the frame 2°. frame 20
The lower surface of is an open surface.

Note that the adjuster 22 is used when tables, chairs, etc. are placed on the floor in a predetermined arrangement in a lobby or the like, and in this case, the fixing fittings 16 for fixing to the floor are unnecessary. Further, the adjuster 22 is not used when connecting chairs are installed and used in a theater hall or the like. In this case, frame 2
0 serves as a protective cover for casters, etc.

Next, the support structure of the casters will be explained.

The casters 24a, 24b are housed in the frame 20 on the outside of the front and rear ends of the fixed frame 14, and arm members 26a, 26 are formed in a U-shape and extend over the upper surface of the fixed frame 14.
A caster support shaft is fixed and attached to the extending end of b.

The support shaft 28 is provided to penetrate the side surface of the fixed frame 14 near the front and rear ends of the fixed frame 14, and the arm members 26a, 26b are pivotally supported by the support shaft 28 and are rotatable in a vertical plane. Become.

Further, at the center position in the longitudinal direction of both sides of the fixed frame 14, a rotating plate 30 is rotatably supported by a support shaft 29. The rotating plate 30 is made of an elongated plate and rotates with the side wall of the leg support 12. The moving plate 30 is always biased counterclockwise by a spring 32, which is biasing means, and is engaged between the upper edges of the moving plate 30.

The arm members 26a, 26 are provided at both ends of the rotary plate 30.
Link plates 34a and 34b are provided for link engagement with b.

The link plates 34a and 34b are provided on both sides of the fixed frame 14 like the rotating plate 30, and the arm member 26 is provided on each side.
a and 26b, respectively. Link board 34
The engagement positions between a and 34b and the arms 26a and 26b are set at positions slightly deviated upward from the support shaft 28, as shown in the figure.

Note that the link plates 3 arranged on both sides of the fixed frame 14
A stopper plate 36 is fixed to the upper edge of 4 across the fixed frame 14.

38 is a lock release lever pivotally supported on the support shaft 29. The lock release lever 38 is also formed of a plate, and its rotation surface is on the same plane as the link plates 34a and 34b. One end of the support shaft 29 extending in the direction of the link plate 34b extends to a position where it abuts the side surface of the edge of the link plate 34b, and the other end protrudes to the outside through a slit provided on the upper surface of the frame 20. 38a is an operation plate for rotating the lock release lever 38.

Next, the operation of the above embodiment will be explained.

FIG. 1 shows a state in which the fixed frame 14 and the adjuster 22 of the frame 20 are in contact with the floor surface 10 and support the leg support 12 with the table or chair installed. The casters 24a, 24b rotate around the support shaft 28 and are lifted up, and the six casters 24a, 24b housed in the frame 20 are lifted up by the rotation of the arm members 26a, 26b around the support shaft 28. The height position relative to the fixed frame 14 changes. When the rotating plate 30 rotates clockwise, the engaging portions of the arm members 26a and 26b with the link plates 34a and 34b are pulled toward the leg support 12, and one arm member 26a rotates counterclockwise. Then, the other arm member 26b rotates clockwise, and the casters 24a and 24b are lifted up and housed in the frame 20.

In this stored state of the casters, the rotating plate 30 is always urged to rotate counterclockwise by the spring 32, and the casters 24a and 24b are always kept on the floor by this urging force and their own weight. Being forced. By pressing the casters 24a, 24b against the floor surface 10 during storage in this manner, it is possible to prevent the casters 24a, 24b from swinging, thereby preventing the generation of abnormal noises due to the movement of the casters. be able to. In a hall or the like where a quiet environment is required, it is very effective to be able to prevent the occurrence of abnormal sounds and noises in this way.

When the table or chair is lifted in the state shown in FIG. 1, the leg support 12, fixed frame 14, and frame 20 are lifted, and the casters 24a and 24b are lowered by their own weight and the biasing force of the spring 32. That is, the arm member 26a rotates clockwise, the arm member 26b rotates counterclockwise, and the casters 24a, 24b extend below the frame 20.

In this embodiment, the spring force of the spring 32 is applied to the casters 24a, 24b, so that the casters 24a, 24b are
4b is made to come out, so the casters 24a,
It has the feature of ensuring that 24b is set to the running state.

In FIG. 2, the casters 24a and 24b are lowered and the rotating plate 30
．． Link plates 34a, 34b, arm members 26a, 26b
are in a straight line. Here, when the rotating plate 30 and the link plates 34a, 34b pass the horizontal position, the arm members 26a, 26b start rotating in the opposite direction. If no regulating force is applied to the link plates 34a, 34b in this state, the arm members 26a, 26b will continue to rotate in the opposite direction, but the stopper plate 3 provided on the link plate 34b
6 comes into contact with the upper surface of the fixed frame 14, stopping the rotating plate 3o at a position slightly past the horizontal state, thereby preventing the arm members 26a, 26b from further rotating in the opposite direction.

When the rotating plate 30 passes the horizontal position, the casters 24a,
A load from a table or the like applied to 24b acts to rotate arm member 26a counterclockwise and arm member 26b clockwise, and causes rotation plate 30 to rotate counterclockwise. Since it acts to move the rotary plate 30, unless an external force is applied to reverse the rotary plate 30, the rotary plate 30 is maintained as it is, and the casters 24a and 24b are locked in the protruding state. The spring 32 acts to maintain this non-returning state.

Due to the above action, when the leg support 12 is lifted, the casters 24a and 24b automatically lower to the lowest position (rotating plate 3
0 becomes horizontal) and is maintained in its protruding state, and the fixed frame 14 and the frame 2o are raised from the floor surface 10 as shown in FIG.

After moving to a predetermined position in the running state shown in FIG. 2, when installing, step on the operation plate 38a of the lock release lever 38 with your foot to house the casters 24a, 24b in the frame 20 and set them. The lock release lever 38 rotates the link plate 34b by lever action, and from the locked position where the rotation plate 30 has passed the horizontal state, it is forcibly reversed in the opposite direction so that the casters 24a, 24b can be stored. It acts like a switch.

The casters 24a, 24b, arm members 26a, 26b, and other members are arranged symmetrically with respect to the leg support 12,
When the lock release lever 30 is stepped on, the casters 24a and 24b are housed in the frame 20 by the weight of the table, chair, etc., and the fixed frame 14 is installed on the floor 10 on the spot.

Note that when the lock release lever 38 is installed with a table or the like on the floor, the operation plate 38a comes to rest in contact with the upper surface of the frame 20, and when the table or the like is lifted, the link plate 3
4b, and the operation plate 38a is lifted from the upper surface of the frame 20.

[Second Embodiment] FIGS. 3 and 4 are explanatory diagrams showing a second embodiment of a moving body with casters.

Fig. 3 shows the installed state, and Fig. 4 shows the running state.

In this embodiment, instead of using the rotary plate 30 in the first embodiment, the ends of the link plates 34a and 34b are pivotally supported by a support pin 40, and a support pin 40 is provided on the side surface of the leg support 12. A long hole 42 to be inserted therethrough is bored in the vertical direction, and the spindle pin 40 is provided to slide vertically within the long hole 42.

Therefore, as shown in FIG.
2, that is, link plates 34a, 34b
If the arm members 26a, 26 are bent, the arm members 26a, 26
b is pulled in the direction of the leg support 12, and the casters 24a,
24b is lifted. As in the previous embodiment, the spring 32 constantly pulls down the spindle pin 40 and biases the casters 24a, 24b in the direction of pressing the casters 24a, 24b against the floor surface.

Due to this biasing force and their own weight, the casters 24a and 24b come into contact with the floor surface 10 in the stored state. This prevents abnormal noises from occurring during storage.

When the leg support 12 is lifted, the casters 24a and 24b descend and protrude from the frame 20. FIG. 4 shows a state in which the link plates 34a, 34b are in a position slightly beyond the horizontal position, and the stopper plate 36 is in contact with the upper surface of the fixed frame 14 and locked. Since the load applied to the casters 24a, 24b acts in a direction that presses the stopper plate 36 against the fixed frame 14, the casters 24a, 24b are locked in the protruding state.

The spring 32 moves the caster 2 due to its spring force.
4a and 24b are reliably brought out to the running state, and
It functions to reliably maintain the above-mentioned locked state.

The lock release lever 38 is pivotally supported by a pin 38b on the side surface of the fixed frame 14, and the action portion for releasing the lock comes into contact with the lower surface of the link position of the link plates 34a, 34b.

When releasing the lock, by stepping on the lock release lever 38, the link portions of the link plates 34, a, 34b are forcibly reversed above the horizontal position, and the casters 24a
, 24b are housed in the frame and the installation is complete.

[Third and Fourth Embodiments] FIGS. 5 and 6 are explanatory diagrams showing third and fourth embodiments of the moving body with casters.

In these third and fourth embodiments, the link mechanism in each of the above embodiments is simplified, and whereas in the above embodiments the arm members 26a and 26b were pivotally supported on the fixed frame 14, the fixed frame 14 It is characterized in that each member such as arm members 26a and 26b is attached to the frame 20 without the need for a frame 20.

As mentioned above, the fixed frame 14 is used when fixing the legs to the floor by tightening bolts, etc., so when simply placing a table, chair, etc. on the floor, the frame 20 is used as the leg and the fixed frame 14 is used. It is also possible to configure a structure in which a link mechanism or the like is attached to the frame 20 without the need for a link mechanism. This configuration can be applied as is to the first and second embodiments. Therefore, the fixed frame 14 and the frame 20 can be collectively regarded as legs that support a table, a chair, etc.

In the embodiment shown in FIG. 5, the arm members 26a and 26b are linked together by one link plate 34, and the casters 24a and 24b are constantly urged by a spring 32 to press against the floor surface. Casters 24a, 24b
Casters 24a serve as locking means at the protruding position.
, 24b protrudes, by mechanical means such as engaging a pin in a link mechanism.

In the embodiment shown in FIG. 6, a gas spring 35 is used to link arm members 26a and 26b. The gas spring 35 is always connected to the arm members 26a and 26b.
is biased in the direction of opening.

The casters 24a and 24b are configured to be locked in a protruding state.

All of the embodiments described above have the advantage that the number of members can be reduced by simplifying the operating members that act on the arm members 26a and 26b.

Although the preferred embodiment of the moving body with casters has been described above, the moving body with casters according to the present invention can be similarly applied not only to tables, chairs, etc., but also to objects that can be moved and installed. , chairs, etc., can also be applied to various products.

Further, since the caster-equipped mobile body of the above embodiment supports the casters by the link mechanism as described above, it has sufficient durability even when applied to heavy tables, chairs, etc. In addition, the installation is characterized by having casters sometimes housed within the membrane, which is superior in terms of appearance and safety.

The present invention has been variously explained above using preferred embodiments, but the present invention is not limited to these embodiments.
Of course, many modifications can be made without departing from the spirit of the invention.

(Effects of the Invention) According to the moving body with casters according to the present invention, by lifting the legs, the casters reliably protrude from the ground contact part and become ready to run. By housing the casters within the membrane, tables, chairs, etc. can be moved and installed without operating levers or handles, allowing extremely efficient and safe handling.

In addition, since the casters are installed with the casters pressing against the ground surface, there are no abnormal noises caused by the swinging of the casters.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams showing the first embodiment of a moving body with casters and its operation, FIGS. 3 and 4 are explanatory diagrams showing the second embodiment and its operation, and FIG. 5 is an explanatory diagram showing the second embodiment and its operation. Embodiment 3, FIG. 6 is an explanatory diagram of the fourth embodiment. 12... Leg support, ]4... Fixed frame, 20
---Frame, 24a, 24b---Casters,
26a, 26b...Arm member, 28...Spindle,
30... Rotating plate, 34. 34a, 34b... Link plate, 35... Gas spring, 36... Stopper plate, 38... Lock release lever, 38a.
...Operation plate, 40... Support pin, 42... Long hole. 1st]・1

Claims (1)

[Scope of Claims] 1. A leg having a grounding part; a caster supported by the leg so as to be rotatable in a vertical plane so as to protrude below the grounding part via an arm member; and between the arm members. Through the link mechanism and the arm member, when the ground contact part of the leg is always in contact with the floor, the caster is urged in the direction of pressing against the floor, and the table, chair, etc. is lifted. and a biasing means for urging the casters to protrude downward from the grounding part when the grounding part of the leg lifts up from the floor surface, and locking the movable part at a position where the caster projects downward from the grounding part. A moving body with casters, comprising: a locking means; and a lock release means for releasing the lock by the locking means. 2. The link mechanism pivotally supports a rotating plate on a side surface of the leg, and links each end of the rotating plate to a position offset from a support axis of the arm member for the leg; 2. The moving body with casters according to claim 1, further comprising a link plate for swinging both the arm members inwardly or outwardly in accordance with the rotation of the rotating plate. 3. The link mechanism supports one end of the arm member at a position offset from the support shaft for the leg, and the other end is linked to each other by a support pin, and the support pin is moved within a predetermined range in the vertical direction. 2. The moving body with casters according to claim 1, further comprising a link plate which is movable up and down and swings both the arm members inwardly or outwardly in accordance with the up-and-down movement of the support pin.