JP2866062B2 - caster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caster.

[0002]

2. Description of the Related Art Conventionally, furniture such as tables, sofas, and display cases, and home electric appliances such as refrigerators are used when rearranging the furniture and cleaning the floor on which the furniture and the like are placed. There have been casters attached to the lower ends of legs of furniture and the like and lower surfaces of furniture and the like for convenience of movement. When moving the furniture etc., this caster is in a state where the wheels of the caster freely rotate and become movable, and
When furniture or the like is moved to a predetermined position, lock the wheel so that the furniture or the like does not move from the predetermined position, and move a lock lever near the wheel to make the caster immovable. , Some with a lock mechanism.

[0003]

In this conventional caster with a lock mechanism, when locking or unlocking the caster, the position of the lock lever is checked, and the lock is locked using a person's hand or foot. The lever had to be operated. Furniture and the like, for example,
When the device is placed in contact with the wall surface of the room and the caster with the lock mechanism is mounted on the wall surface side, it is difficult to operate the lock lever. Also, when furniture etc. do not have legs and casters are directly attached to the lower surface, there is not much distance between the lower surface of furniture etc. and the floor surface, so casters with locking mechanism are attached to the front side Even when the lock lever is operated, it is difficult to operate the lock lever.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and an object of the present invention is to make it possible to easily move without a troublesome operation such as a lock lever operation. It is an object of the present invention to provide a caster capable of switching between a state and an immovable state.

[0005]

A caster according to the present invention has the following configuration to achieve the above object.
That is, the invention according to claim 1 is attached to a lower end portion of furniture or the like, is movable on a floor surface on which the furniture or the like is placed, and has an inclined surface on an upper side, A caster body that can move on the floor, and a support that is attached to a lower end of the furniture or the like and that allows or guides the caster body to be able to move up and down, and is mounted on the inclined surface, It is composed of a movable body that can descend from its upper part to its lower part by its own weight. Here, the support has a protruding piece that protrudes above a movable body located below the inclined surface. Then, when the movable body is located below the inclined surface and the lower surface of the projecting piece contacts the movable body, the lower end of the caster body is located below the lower end of the support. Further, when the movable body moves from the lower part of the inclined surface and comes off the lower surface of the protruding piece, the caster body is moved upward until its lower end is at least as high as the lower end of the support. Can be moved.

The casters are mounted on the lower end of furniture or the like such that the inclined surface of the caster body is lowered toward one end of the furniture or the like, and the furniture or the like is placed on the floor. At this time, if the movable body is located below the inclined surface of the caster body, the lower surface of the protruding piece contacts the movable body,
The lower end of the caster body is located below the lower end of the support and is in contact with the floor. That is, in this case, the casters are movable on the floor.

Here, when one end of furniture or the like is lifted upward until the inclined surface of the caster body becomes horizontal and further inclined in the opposite direction, the support is also lifted along with it, and the caster body is lifted by its own weight. , And a gap is generated between the movable body and the lower surface of the protruding piece. Then, the movable body moves on the inclined surface in the upward direction due to its own weight, and comes off the lower surface of the projecting piece. Therefore, when furniture or the like is quickly lowered, the caster body pressed by the floor surface moves relatively upward before the movable body returns to the lower part of the inclined surface, that is, below the protruding piece. Then, the movable body is blocked by the protruding pieces and cannot reach the lower part of the inclined surface. Then, the caster body is pressed against the floor surface until the lower end of the caster body and the lower end of the support body are at the same height, that is, until the lower end of the support body abuts on the floor surface. Move upward. As a result, the caster is supported by the support that is in contact with the floor surface, and cannot move on the floor surface.

Next, from this state, when the one end of the furniture or the like is lifted up again so that the inclined surface of the caster body does not reach the horizontal level, the support is also lifted along with it, and the caster body is lifted by its own weight. , Fall relatively.
Then, the movable body is released from the block of the projecting piece of the support, and moves to a lower part of the inclined surface of the caster body by its own weight. Therefore, when furniture or the like is lowered, the lower end of the caster body contacts the floor surface, the lower surface of the protruding piece of the support comes into contact with the movable body, and the caster is in the movable state.

Further, as in the second aspect of the present invention, the inclined surface may extend only in one direction from a lower portion thereof and reach an upper portion thereof. Thereby, the lower part and the upper part of the inclined surface can be respectively located on both side portions of the caster body, so that the caster body can be made smaller.

Further, as in the third aspect of the present invention, the inclined surface may extend radially from a lower portion to reach an upper portion formed so as to surround the entire periphery of the lower portion. Thereby, the directionality of the inclined surface of the caster body is lost.

According to a fourth aspect of the present invention, the inclined surface moves further upward than a position where the movable body moves from a lower portion of the inclined surface and is just off the lower surface of the projecting piece. It is desirable to have an upper part of the slope so that it is possible. Thus, the time during which the movable body descends from the upper part to the lower part of the inclined surface can be lengthened. Therefore, when the caster is set to be immovable, it is easy to lower the protruding piece of the support body faster than the movable body descends from the upper part to the lower part of the inclined surface.

Further, as in the invention as set forth in claim 5, the inclined surface may have an upper portion whose inclination is gentler than that of other portions. Here, the upper portion means the upper portion and its vicinity (the same applies hereinafter). Thereby, in order to move the caster from the movable state to the immovable state, lift one end of the furniture or the like and move the movable body to the upper part of the inclined surface of the caster body, and then lower the lifted furniture or the like. The movable body located at the upper part, which has a gentle inclination, starts to descend toward the lower part of the inclined surface with a delay. Therefore, it is possible to lower the projecting piece of the support more easily than before the movable body descends from the upper part to the lower part of the inclined surface.

According to a sixth aspect of the present invention, the inclined surface has a frictional resistance between an upper surface of the inclined surface and the movable body, and a frictional resistance between the other inclined surface and the movable body. It may be larger than the frictional resistance. Thereby, in order to move the caster from the movable state to the immovable state, lift one end of the furniture or the like and move the movable body to the upper part of the inclined surface of the caster body, and then lower the lifted furniture or the like. Since the frictional resistance between the upper surface of the inclined surface and the movable body is large, the movable body located at the upper portion starts to descend toward the lower portion of the inclined surface with a delay. For this reason, faster than the movable body descends from the upper part of the slope to the lower part,
It is easier to lower the protruding piece of the support.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a caster according to the present invention will be described below with reference to the drawings. The casters include, for example, furniture (desks, tables, sofas, display cases, beds, etc.), household appliances (refrigerators, etc.), furniture including pianos and other heavy objects (hereinafter, simply referred to as furniture, etc.). Attached to the lower end of the Here, the lower end indicates the lower end of the leg when the furniture or the like has a leg, and indicates the lower surface of the furniture or the like when the furniture or the like does not have a leg.

FIGS. 1 to 8 show a first embodiment of a caster according to the present invention. FIGS. 1 and 3 show a state in which the casters 3 are attached to the lower ends 1 b of the legs 1 a of the table 1 shown by the two-dot chain line and are placed on the floor 2 shown by the one-dot chain line. The caster 3 includes a caster body 4, a support 5, and a movable body 6. The caster body 4 includes a main body 4a and wheels 4b. The main body 4a has a cylindrical lower portion 4c that opens downward.
And a large-diameter cylindrical upper part 4d concentric with the cylinder of the lower part 4c are integrally formed. A step 4e is formed at the boundary between the lower part 4c and the upper part 4d. On the upper surface of the upper portion 4d, grooves 4f are formed on both sides and open upward, and the bottom surface of the groove 4f is an inclined surface 4g which is linearly inclined in the direction of both sides. . A shaft member 4h is attached to the lower portion 4c by caulking or the like so as to cross the inside of the cylinder, and a spherical body 4j having a through hole 4i formed in the center of the shaft member 4h. Is fitted and fixed. The wheel 4b is rotatably fitted to the spherical body 4j via a metal (not shown). Therefore, the wheel 4b is rotatable around an axis perpendicular to the axis of the shaft member 4h (for example, an axis perpendicular to the floor surface 2) at a fixed angle, that is, until the wheel 4b comes into contact with the shaft member 4h. Also, it is freely rotatable around the axis of the wheel 4b. Thus, the caster body 4 is
On the floor 2, the wheels 4b rotate around an axis perpendicular to the floor 2, thereby changing the direction in which the wheels 4b face. Also, when the wheels 4b rotate around the axis, the caster body is rotated. 4
Becomes movable.

In the illustrated embodiment, the center axis of rotation of the wheel 4b about an axis perpendicular to the floor surface 2 and the center axis of rotation of the wheel 4b about the axis. , The caster body 4 and the caster body 4
The size of the support body 5 for housing the casters 3 can be reduced, and the size of the entire caster 3 can be reduced. However, the structure of the mounting structure of the wheel 4b can be appropriately changed, and it is needless to say that the structure is not limited to the structure shown in the illustrated embodiment.

On the other hand, the support 5 is a cylindrical support member 5a.
And a lid member 5b attached to the support member 5a by welding or the like so as to cover the upper surface of the support member 5a. The lower part 5c of the support member 5a is thicker inward than the upper part 5d, and a step 5e is formed at the boundary between them. The caster body 4 is housed in the support member 5a from above. The inside of the upper part 5d of the support member 5a can be slidably contacted with the upper part 4d of the caster body 4, and an allowance / guide surface 5f that guides the caster body 4 movably up and down.
Further, the step 4e of the caster body 4 opposes the step 5e of the support member 5a, and restricts the downward movement of the caster body 4 with respect to the support 5. At this time, the caster body 4 is prevented from rotating around the axis of the cylindrical support member 5a.
a through the outer peripheral surface of the upper part 5d,
And a fastening screw attached so as to reach the outer peripheral surface of the upper part 4d. Then, the lid member 5b
Has, for example, a square plate shape, and has a support member 5a
At the corners of a square projecting from the outer peripheral surface of the table 1, through holes 5g and 5g penetrating vertically are provided for attaching the support 5 to the lower end 1b of the leg 1a of the table 1 with screws or the like. Further, the lid member 5b is
The caster 4 is integrally provided with a protruding piece 5h that protrudes above the movable body 6 located at a lower portion 4k of the inclined surface 4g.
The lower surface 5i of the protruding piece 5h has a conical concave shape so as to easily hold the movable body 6 at that position when it comes into contact with the movable body 6 located at the lower part 4k of the inclined surface 4g. Here, the movable body 6 is made of, for example, a sphere such as a steel ball, and is mounted on the inclined surface 4g in the groove 4f of the caster body 4 housed in the support body 5, and the upper part of the inclined surface 4g by its own weight. 4m
It can be lowered by rolling from to the lower part 4k. The inclined surface 4g extends only in one direction from the lower part 4k and reaches the upper part 4m. Further, the inclined surface 4g is inclined so that the movable body 6 can move from a lower portion 4k of the inclined surface 4g of the caster body 4 and can move further upward than a position just off the lower surface 5i of the projecting piece 5h. It is set to be sufficiently long so as to have the upper part 4m of the surface 4g.

The dimensions of the caster body 4, the support body 5 and the movable body 6 are determined when the movable body 6 is located at the lower part 4k of the inclined surface 4g and the lower surface 5i of the projecting piece 5h contacts the movable body 6. The lower end 4n of the caster body 4, that is, the lower end 4n of the wheel 4b, is set to be lower than the lower end 5j of the support 5, that is, the lower end 5j of the support member 5a (see FIG. 1). Furthermore, their dimensions are such that the movable body 6 is
When the caster body 4 moves from the lower portion 4k of the g and comes off the lower surface 5i of the projecting piece 5h, the caster body 4 is allowed and guided by the support member 5a until its lower end 4n is at least as high as the lower end 5j of the support 5. It is set so that it is allowed or guided by the surface 5f and can move upward (see FIG. 3).

Next, the operation and effect of the caster 3 shown in the first embodiment will be described. The caster 3 is attached to the lower end 1b of the leg 1a of the table 1 by a screw or the like via the cover member 5b of the support body 5, for example. Then, the table 1 is placed on the floor surface 2. At this time,
The inclined surface 4g of the caster body 4 is positioned at one end 1c of the table 1.
So that it is oriented downward. Here, when the movable body 6 abuts on the support member 5a and is located at the lower part 4k of the inclined surface 4g of the caster body 4, the lower surface 5i of the protruding piece 5h abuts on the movable body 6 and the caster body The lower end 4n of the support 4 is located below the lower end 5j of the support 5 and is in contact with the floor surface 2. That is, in this case, the casters 3 are movable on the floor 2 (see FIG. 1).

From this state, one end 1c of the table 1 is
When the inclined surface 4g of the caster body 4 becomes horizontal, and is further lifted up until it is inclined in the opposite direction, the support body 5 is also lifted with it, and the caster body 4 is allowed to move by its own weight, thereby allowing and guiding the support body 5. 5f, the step 4e of the caster body 4 is moved to the step 5e of the support 5.
The movable body 6 and the projecting piece 5
A gap is generated between the lower surface 5h and the lower surface 5i. Then, the movable body 6
Moves the inclined surface 4g toward the upper part 4m by its own weight, and comes off the lower surface 5i of the protruding piece 5h. Then, the movable body 6 comes into contact with the support member 5a and reaches the upper portion 4m of the inclined surface 4g (see FIGS. 4 and 5). Therefore, when the table 1 is quickly lowered, the caster body 4 pressed by the floor surface 2 before the movable body 6 returns to the lower part 4k of the inclined surface 4g, that is, below the protruding piece 5h, allows the support body 5 to move. Guideway 5
f moves relatively upward. Then, the movable body 6 is blocked by the protruding piece 5h and cannot reach the lower part 4k of the inclined surface 4g. At this time,
Since the inclined surface 4g is set to be sufficiently long, the time during which the movable body 6 descends from the upper part 4m to the lower part 4k of the inclined surface 4g can be lengthened, and the movable body 6 can move to the lower part 4k of the inclined surface 4g. It is easy to lower the protruding piece 5h of the support 5 earlier than it reaches. Then, until the lower end 4n of the caster body 4 and the lower end 5j of the support 5 have the same height,
That is, until the lower end 5j of the support 5 contacts the floor surface 2,
The caster body 4 is pushed by the floor surface 2 and moves relatively upward with respect to the support body 5. As a result, the casters 3 are supported by the support 5 in contact with the floor 2, and
Above, it becomes immovable (see FIG. 3). Further, if the other end side of the table is operated in the same manner, the caster on the other end side can also be made immovable.

Then, from this state, when the end 1c of the table 1 is again lifted to such an extent that the inclined surface 4g of the caster body 4 does not reach the horizontal level, the support body 5 is also lifted along with it, and the caster body 4 is lifted accordingly. With its own weight, it is allowed or guided by the allowance / guide surface 5f of the support 5,
It goes down relatively. Then, the movable body 6 is released from the block of the protruding piece 5h of the support body 5 and moves toward the lower part 4k of the inclined surface 4g of the caster body 4 by its own weight (see FIG. 6). When the movable body 6 comes into contact with the support member 5a and reaches the lower part 4k of the inclined surface 4g, the table 1 is lowered, and the lower end 4n of the caster body 4 comes into contact with the floor surface 2 and the projecting piece 5h of the support body 5 The lower surface 5i contacts the movable body 6,
The caster 3 is in the movable state described above (see FIG. 1). Further, if the other end of the table 1 is operated in the same manner, the casters 3 on the other end can also be made movable. Thus, table 1
The caster 3 can be switched between a movable state and a non-movable state by a simple operation of raising and lowering one end 1c of the caster 3.

Here, the inclined surface 4g is not linear,
By bending as shown in FIG. 7 or forming an arc as shown in FIG. 8, the inclination of the upper part including the upper part 4m and its vicinity is gentler than the inclination of the other parts. It may be formed. Thus, in order to move the caster from the movable state to the immovable state, the one end 1c of the table 1 is lifted to move the movable body 6 to the upper part 4m of the inclined surface 4g of the caster body 4, and then lifted. When the table 1 is lowered, the movable body 6 located in the upper part having a gentle inclination starts to descend toward the lower part 4k of the inclined surface 4g with a delay. For this reason,
Since it is easier to lower the protruding piece 5h of the support 5 earlier than the movable body 6 descends from the upper part 4m to the lower part 4k of the inclined surface 4g, the casters 3 can be more securely.
Can be made immovable. Also, inclined surface 4
By partially changing the surface roughness or using a different material, the frictional resistance between the upper part of the inclined surface 4g and the movable body 6 is larger than the frictional resistance between the other part and the movable body 6. It may be formed to be large. By doing so, the inclined surface 4
The same operation and effect as when the inclination of g is changed can be produced.

FIGS. 9 and 10 show a second embodiment of the caster according to the present invention. FIG. 9 and FIG.
The caster 11 is attached to the lower end 1b of the leg 1a of the table 1 shown by a two-dot chain line, and is placed on the floor 2 shown by a one-dot chain line. The caster 11 includes a caster body 12, a support 13 and a movable body 14. The caster body 12 includes a main body 12a and a ball member 12b. The main body 12a is formed integrally with a cylindrical lower part 12c and a large-diameter disk-shaped upper part 12d concentric with the cylinder of the lower part 12c. A step portion 12e is formed at a boundary between the lower portion 12c and the upper portion 12d. The upper part 12
On the upper surface of d, an inclined surface 12f is formed which is concentric with the disk-shaped lower portion 12c and is depressed and inclined in a conical shape. Further, a recessed portion 1g is formed in a lower portion 12g of the inclined surface 12f so that a movable body 14 described later is easily held by the lower portion 12g.
2h are formed. A substantially hemispherical concave portion 12i is formed on the lower surface of the lower portion 12c, and the above-mentioned spherical member 12b is inserted so as to partially protrude from the lower surface, and the entrance of the concave portion 12i is caulked. Has been locked. The ball member 12b is freely rotatable in any direction with respect to the main body 12a. Thus, the caster body 12 can move in any direction on the floor surface 2.

On the other hand, similarly to the support 5 shown in the first embodiment, the support 13 is attached to the cylindrical support member 13a and the support member 13a by welding or the like so as to cover the upper surface of the support member 13a. And a lid member 13b to be attached. The lower portion 13c of the support member 13a is
It is thicker inward than d, and a step 13e is formed at the boundary between them. The caster body 12 is housed in the support member 13a from above. The lower portion 13c of the caster body 12 can slidably contact the inside of the lower portion 13c of the support member 13a, and serves as an allowance / guide surface 13f for allowing or guiding the caster body 12 to be able to move up and down. The step 12 e of the body 12 is opposed to the step 13 e of the support 13 and restricts the downward movement of the caster body 12 with respect to the support 13. The lid member 13b has a circular plate shape, and a male screw portion 13g for attaching the support 13 to the lower end 1b of the leg 1a of the table 1 is formed at the center of the upper surface. Further, the lid member 13b
From the center of the lower surface, the inclined surface 12f of the caster body 12
And a protruding piece 13h that protrudes above the movable body 14 located at the lower portion 12g of the body. Here, the movable body 14
Consists of a sphere such as a steel ball as in the first embodiment,
The inclined surface 12 of the caster body 12 housed in the support 13
f on the inclined surface 12f by its own weight.
It is possible to descend by rolling from j to the lower part 12g. The inclined surface 12f extends radially from the lower part 12g and reaches the upper part 12j formed so as to surround the entire periphery of the lower part 12g.

The dimensions of the caster body 12, the support body 13 and the movable body 14 are the same as in the first embodiment, with the movable body 14 positioned at the lower part 12g of the inclined surface 12f and the lower surface 13i of the projecting piece 13h. Is in contact with the movable body 14, the lower end 12 k of the caster body 12, that is, the lower end 12 k of the spherical member 12 b is connected to the lower end 13 k of the support 13, that is, the support member 1.
It is set to be located below the lower end 13k of 3a (see FIG. 9). Furthermore, their dimensions are
Moves from the lower part 12g of the inclined surface 12f,
3h, the caster body 12
However, the lower end 12 k is at least the lower end 13 of the support 13.
It is set so that it is allowed or guided by the allowance / guide surface 13f of the support member 13a and can move upward until it reaches the same height as k (see FIG. 10).

The operation and effect of the caster shown in the second embodiment are almost the same as those of the first embodiment.
Only different parts will be described. Since the caster body 12 includes the ball member 12b, the caster 11 can move in any direction. In addition, since the inclined surface 12f of the caster body 12 extends radially from the lower portion 12g, it has no directionality, and when mounting the caster 11 to the lower end 1b of the leg 1a of the table 1, it is necessary to consider the direction. There is no. On the other hand, when compared with the inclined surface 4g shown in the first embodiment extending only in one direction from the lower portion 4k, the lower surface 12f of the inclined surface 12f shown in the second embodiment is different.
When the length from g to the upper part 12j is the same as that of the first embodiment, the caster body 12 becomes large. Conversely, in the caster 3 shown in the first embodiment, the lower part 4k and the upper part 4m of the inclined surface 4g are respectively located on both side portions of the caster body 4, so that the caster body 4 is made smaller. be able to.

Note that the present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, instead of the inside of the upper part 5d of the support member 5a, the lower part 4c of the caster body 4 can slidably contact the inside of the lower part 5c of the support member 5a, and the caster body 4 can be moved up and down. It may be allowed to function as an allowance / guide surface for permitting or guiding the vehicle. Further, the supports 5, 1
The support members 5a and 13a of the third embodiment are not formed in a cylindrical shape so as to surround the caster bodies 4 and 12, but may be formed in the caster bodies 4 and 12 by forming holes vertically penetrating therethrough. The support member 5 extends downward from the lid members 5b and 13b.
a, 13a may be protruded, and the side surfaces thereof may be allowed / guide surfaces. Also, if the allowance / guide surfaces 5f, 13f of the supports 5, 13 are sufficiently long and the casters 4, 12 do not fall off the supports 5, 13 when the one end 1c of the table 1 is lifted, the casters 4 , 12 and steps 5e, 13e of the supports 5, 13
May not be required. Further, in the caster 3 shown in the first embodiment, when the movable body 6 is located at the lower part 4k and the upper part 4m of the inclined surface 4g, the movable body 6 is in contact with the support member 5a. 4 inclined surface 4g
A wall may be provided on both sides, and the movable body 6 may contact the wall. Also, the movable bodies 6 and 14 need not be spherical, but may be those that can descend from the upper parts 4m and 12j of the inclined surfaces 4g and 12f to the lower parts 4k and 12g by their own weights, for example, slide on the inclined surfaces 4g and 12f. May be used.

[0028]

As is clear from the above, the caster according to the present invention has the following effects.

According to the first aspect of the present invention, it is possible to switch between a movable state and an immovable state by a simple operation of raising and lowering one end of furniture or the like to which the caster is attached. Can be.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the size of the caster can be reduced.

According to the third aspect of the present invention, in addition to the effect of the first aspect, it is not necessary to consider the direction when the caster is mounted on furniture or the like.

According to the fourth aspect of the present invention, in addition to the effect of any one of the first to third aspects, the caster can be reliably made immovable.

According to the caster described in claim 5 or claim 6, in addition to the effect of claim 4, it is possible to more reliably make the caster immovable.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a caster according to the present invention, in a state where the caster is movable.

FIG. 2 is also a bottom view.

FIG. 3 is a vertical sectional view showing a state in which the casters cannot be moved.

FIG. 4 is a vertical cross-sectional view showing a state in which one end of a table is lifted when a caster is immobilized.

FIG. 5 is a front view showing the entire table when one end of the table is lifted when the casters are immovable.

FIG. 6 is a vertical cross-sectional view showing a state where the movable body is moving toward the lower part of the inclined surface by lifting one end of the table when the caster is made movable.

FIG. 7 is a view corresponding to FIG. 4, showing another example of the inclined surface.

FIG. 8 is a view corresponding to FIG. 4, showing another example of the inclined surface.

FIG. 9 is a longitudinal sectional view showing a second embodiment of the caster according to the present invention, in a state where the caster is movable.

FIG. 10 is a longitudinal sectional view showing a state in which the casters cannot move.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Table (furniture etc.) 1b Lower end (lower end part) 2 Floor surface 3 Caster 4 Caster body 4g Inclined surface 4k Lower part 4m Upper part 4n Lower end 5 Support 5h Projection piece 5i Lower surface 5j Lower end 6 Movable body 11 Caster 12 Castor body 12f Inclined Surface 12g Lower part 12j Upper part 12k Lower end 13 Support body 13h Projecting piece 13i Lower surface 13k Lower end 14 Movable body

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-7-298939 (JP, A) JP-A-8-11503 (JP, A) JP-A-2-31525 (JP, U) JP-A-49 129830 (JP, U) Jiko 35-2837 (JP, Y1) Jiko 44-27932 (JP, Y1) Jiko 45-25936 (JP, Y1) Jiko 50-11485 (JP, Y1) 51-25096 (JP, Y2) JP 6-36466 (JP, Y2) JP 5-17121 (JP, B2) JP 4-48446 (JP, B2) (58) Fields surveyed (Int.Cl. ⁶ , DB name) B60B 33/06 B60B 33/00 A47B 91/00

Claims (6)

(57) [Claims] 1. A caster which is attached to a lower end portion of furniture and the like and is movable on a floor surface on which the furniture and the like are placed. A caster body that can move upward, a support member that is attached to a lower end portion of the furniture or the like and that allows or guides the caster body to be movable up and down, A movable body that can be lowered from the upper part to the lower part of the inclined surface, wherein the support includes a protruding piece that protrudes above the movable body located at the lower part of the inclined surface; When the lower surface of the protruding piece abuts on the movable body, the lower end of the caster body is located below the lower end of the support, and the movable body is located on the lower surface of the inclined surface. From the bottom of the The caster, wherein when it comes off, the caster body can move upward until its lower end is at least as high as the lower end of the support. 2. The device according to claim 1, wherein the inclined surface extends only in one direction from a lower part thereof and reaches an upper part thereof.
Caster described in. 3. The caster according to claim 1, wherein the inclined surface extends radially from a lower portion of the caster, and reaches an upper portion formed to surround the entire circumference of the lower portion. 4. The upper surface of the inclined surface is provided so that the movable body can move from a lower portion of the inclined surface and move further upward than a position just off the lower surface of the projecting piece. The caster according to any one of claims 1 to 3, wherein the caster is provided. 5. The inclined surface has an upper portion inclined,
The caster according to claim 4, wherein the inclination of the other part is gentler. 6. The inclined surface, wherein the frictional resistance between the upper surface of the inclined surface and the movable body is greater than the frictional resistance between the other inclined surface and the movable body. The caster according to claim 4, wherein