JP2006188112A - Vertically movable caster and furniture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertically movable caster constituted of a caster body provided with an engaging part and a supporting body forming and providing a vertical movement controlling groove, capable of projecting and storing the caster in simple structure and usable for small and large furniture, and the furniture using this vertically movable caster. <P>SOLUTION: This vertically movable caster is characteristically furnished with the caster body constituted by projecting and providing a supporting shaft on the caster and the supporting body constituted by forming and providing the vertical movement controlling groove constituted by providing a receiver groove to be engaged with the engaging part when the caster body is moved downward, a supporting groove to be engaged with the engaging groove to project the caster when the caster body is moved upward, a receiver groove to be engaged with the engaging part when the caster body is moved downward again and a storage groove to be engaged with the engaging part so as to store the caster upward when the caster body is moved upward again. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a caster that can move up and down and furniture to which the caster is attached.

  As a conventional technique, a bolt is inserted into a through-hole formed in the mounting plate, and the bolt is screwed to the lifting plate, and one end portion of the first arm is pivotally attached to both ends of the lifting plate. Connecting brackets are arranged on both sides, and the other end of the first arm is pivotally attached to the connecting bracket. Two caster support members are connected to each connection bracket, and the casters are supported by the caster support members. There is provided a furniture moving device in which the support member is pivotally attached to the lower surface of the mounting plate by a pair of second arms so as to move in parallel with the mounting plate and move up and down, and each caster support member and the mounting plate are connected. is there. (See Patent Document 1)

Further, as another conventional technique, an inner leg column having a female screw member fixed to the lower surface of the table and having a female screw at the center thereof is fitted on the lower end portion, and is externally fitted to the inner leg column. In a table height adjusting device comprising: an outer pedestal comprising an upwardly facing male threaded rod; and a caster attached to a lower part of the outer pedestal and pivotable about an axis coaxial with the male threaded rod. Both the male screw rod and the female screw of the female screw member have rough pitches, and the lower end portion of the male screw rod is attached to the bearing member fixed to the lower end portion of the outer pedestal and provided at the lower portion of the bearing member. There is a table height adjusting device characterized in that a caster shaft having a fine pitch at the upper part of the caster is screwed onto a lower female screw portion having a fine pitch. (See Patent Document 2)
JP 2003-225130 A JP 2004-135819 A

The former has a complicated structure and corresponds to heavy furniture, and cannot be used for small furniture (chance) or tables.
In particular, it is a form that cannot be installed in the legs of the table.

  In the latter case, the length of the pedestal of the table is simply adjusted, and it does not have a function of storing casters.

  The present invention has been made in view of the above-mentioned problems, and its purpose is composed of a caster body provided with a locking portion and a support body formed with a vertical movement control groove. The present invention provides a vertically movable caster that can be projected and stored and can be used for small to large furniture and furniture using the vertically movable caster.

In order to achieve the above object, according to the present invention, in a vertically movable caster, a support shaft is projected from the caster, and a caster body provided with a locking portion on the support shaft, and the caster body is moved downward. When the caster body is moved upward, the receiving groove for locking the locking part is moved upward, the support groove for locking the locking part to project the caster is moved again downward, When the caster body is moved upward again, the receiving groove that locks the locking portion is formed with a vertical movement control groove that is provided with a storage groove that locks the locking portion so that the caster can be stored upward. It consists of a support. The locking part is a shaft protruding at least one in the horizontal direction. The support is cylindrical and has a vertical movement control groove formed inside. The vertical movement control groove is provided with a support groove and a storage groove in the upper part and a receiving groove in the lower part. The vertical movement control groove is formed by alternately forming support grooves and storage grooves on the upper side and continuously forming receiving grooves on the lower side. The receiving groove is formed by shifting the vertical axis with respect to the support groove and the storage groove.
Further, the furniture is characterized in that the vertically movable caster according to any one of claims 1 to 6 is attached.

With the above structure, the present invention has the following effects.
In vertically movable casters,
1) The caster body can be projected and stored while having a simple structure consisting of a caster body with a locking portion and a support with a vertical movement control groove. Can be used for furniture.
2) By using the locking portion as a shaft protruding in the horizontal direction, the locking portion can be reliably locked even though it is a simple mechanism.
3) Since the support portion is cylindrical and the vertical movement control groove is formed inside, the lock portion can be reliably locked and fixed at a required position.
4) The vertical movement control groove is formed with a support groove and a storage groove in the upper part and a receiving groove in the lower part, and the receiving groove is formed by shifting the vertical axis with respect to the support groove and the storage groove. By doing so, by moving the caster (caster body) up and down, the locking portion can be automatically rotated and locked and fixed alternately to the support groove and the storage groove.
In furniture,
1) By providing the upper and lower movable casters at the lower four corners of the chest or the legs of the table, when moving, the caster is brought to the required position while protruding, and the caster body is lifted by lifting the chest and table upward. It automatically rotates and is locked in the storage groove, so that a chiffon or table can be placed.
Further, by providing a slip stopper on the lower surface of the furniture, it can be used without being worn by vibration due to an earthquake or the like when the caster body is stored.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (See Figs. 1 to 5)
The vertically movable caster 1 is composed of a caster body 2 and a support 3.
The caster body 2 includes a cylindrical support shaft 2b protruding from a rotatable caster 2a, and an upper horizontal concentric shaft of the support shaft 2b provided with a locking portion 2c using two shafts.
The support 3 is formed in a cylindrical shape, and is formed with a vertical movement control groove 3a on the inner side.
The vertical movement control groove 3a is formed by alternately forming support grooves 3a1 and storage grooves 3a2 inclined upward in the upper part and continuously forming receiving grooves 3a3 inclined downward in the lower part.

Next, the vertical movement control groove 3a of the support 3 in the above embodiment is expanded from 0 ° to 360 °, and the movement of the locking portion 2c (support shaft 2b) will be described. (See Figure 6)
First, it demonstrates as 0 degree-90 degrees a, 90 degrees-180 degrees b, 180 degrees-270 degrees c, 270 degrees-360 degrees d.
At a, the locking portion 2c1 moves from the receiving groove 3a31 to the support groove 3a11 and is locked and fixed. (See Figure 8)
At this time, the caster body 2 (support shaft 2b) protrudes and is supported by the support body 3, so that the caster 2a can move.

  Further, from a to b, the locking portion 2c1 is once moved downward and locked to the receiving groove 3a32, and then the locking portion 2c1 is moved to the storage groove 3a21 and locked. (The state in which the support 3 is raised) (see FIG. 7)

  Next, from b to c, the locking portion 2c1 is once moved downward and locked to the receiving groove 3a33, and then the locking portion 2c1 is moved to the support groove 3a12 and locked. (The state in which the support 3 is lowered) (same as FIG. 8)

  Then, from c to d, after the locking portion 2c1 is once moved downward and locked to the receiving groove 3a34, the locking portion 2c1 is locked and fixed to the storage groove 3a22. (The state in which the support 3 is raised) (same as FIG. 7)

  By repeating these steps, the caster body 2 can be alternately projected and housed.

In addition, the above-mentioned movement is carried out by attaching the vertically movable casters 1 to the four inner sides of the frame W of the furniture K as a movable table provided with a frame W having a wooden lower surface provided with a tatami T on the upper surface, for example. By raising or lowering, the support shaft 2a (locking portion 2c1) of the caster body 2 can be automatically rotated and moved.
In addition, it is also considered to provide a slip stopper SB on the lower surface of the furniture K.

As another embodiment, it may be considered to smoothly move the support shaft 23 by providing a spring S therein.
In each of the above embodiments, the number of locking portions and the number of support grooves, storage grooves, and receiving grooves are not particularly limited, and may be determined as necessary.
Also, the caster is not limited in size, material, etc., but may be a rotary type or a fixed type.
Further, the furniture is not limited to the table, and may be set as necessary, such as a chair or a desk.

  The front view of the caster main body of the up-and-down movable caster which shows 1st Example of this invention.   The top view of the caster main body of the up-and-down movable caster which shows 1st Example of this invention.   The front view of the support shaft of the up-and-down movable caster which shows 1st Example of this invention.   The side view of the support shaft of the up-and-down movable caster which shows 1st Example of this invention.   The top view of the support shaft of the up-and-down movable caster which shows 1st Example of this invention.   The expanded view of the support shaft of the up-and-down movable caster which shows 1st Example of this invention.   The front view when the caster main body of the up-and-down movable caster which shows 1st Example of this invention is accommodated.   The side view when the caster main body of the up-and-down movable caster which shows 1st Example of this invention protrudes.   The perspective view of the principal part of the up-and-down movable caster which shows 2nd Example of this invention.   The center longitudinal section front view of the furniture which shows embodiment of this invention.

Explanation of symbols

1 --- Vertical movable caster 2 --- Caster body 2a--Caster 2b--Support shaft 2c--Locking portion 3 --- Support 3a--Vertical motion control groove K --- Furniture

Claims (7)

  A caster main body with a support shaft protruding from the caster and a locking portion provided on the support shaft, and a receiving groove for locking the locking portion when the caster main body is moved downward, the caster main body upward. When the caster body is moved again, the support groove that locks the locking portion to project the caster is moved again. When the caster body is moved downward again, the receiving groove that locks the locking portion is moved upward again. A vertically movable caster comprising: a support body formed with a vertical movement control groove formed with a storage groove for locking the locking portion so as to store the caster upward when moved.   2. The vertically movable caster according to claim 1, wherein the locking portion is a shaft protruding at least one in the horizontal direction.   The vertically movable caster according to claim 1 or 2, wherein the support is cylindrical and has a vertical movement control groove formed inside.   4. The vertically movable caster according to claim 1, wherein the vertical movement control groove is provided with a support groove and a storage groove in an upper part and a receiving groove in a lower part.   5. The vertical movement control groove is formed by alternately forming a support groove and a storage groove on the upper side, and continuously forming a receiving groove on the lower side. Vertically movable caster.   6. The vertically movable caster according to claim 1, wherein the receiving groove is formed by shifting a vertical axis with respect to the support groove and the storage groove.   A furniture comprising the upper and lower movable casters according to any one of claims 1 to 6.

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