JP2001130206A - Caster mounting structure of furniture or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a caster installed on a leg lever of furniture, shopping cart and the like from being fallen down and facilitate the removal of the caster and a caster receiver from the leg lever. SOLUTION: In this caster mounting structure, a caster receiver 3 is fitted into a lower end opening 4 in a leg lever 2 and a screw lever 12 provided on a caster 1 is screwed in a vertical screw hole 7 in the caster receiver 3. The caster receiver 3 is formed in a plastic formed product by connecting integrally with the upper surface of a locking flange 5 in contact with the edge of a lower end opening 4 in the leg lever 2 so as to vertically provide a base part 6 fitted into the opening 4, forming a vertical screw hole 7 leading from the lower surface of the locking flange 5 to near the upper end of the base part 6, and providing a plurality of split grooves 8 leading from the upper end of the base part 6 to the upper face of the locking flange 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caster mounting structure mounted on a lower end of a leg of a furniture or a shopping cart, and more particularly, to a caster mounting structure for preventing the caster from falling off from the leg. .

[0002]

2. Description of the Related Art As a mounting structure of a caster at a lower end of a leg rod of furniture or the like, a structure shown in FIG. 9 is known. This is because a caster receiver (c) made of plastic or the like is pressed into a lower end opening (b) of a leg (a) of furniture or the like from below, and a mounting hole (d) provided in the caster receiver (c) is provided. )
Then, the caster (e) is attached to the leg (a) by inserting or screwing the vertical rotation shaft (f) of the caster (e).

[0003]

However, in such a conventional mounting structure, the caster receiving member (c) is simply press-fitted into the leg rod (a), and the wheels of the caster (e) are mounted. Since the rotation support shaft (g) is deviated from the center axis of the leg (a), the lower end of the leg (a) can be opened by long-term use.
The caster (e) falls off from the leg (a) due to the expansion of (b) or the reduction of the fitting fitting (h) of the caster receiver (c) to the leg (a). Sometimes.

SUMMARY OF THE INVENTION [0004] The present invention can effectively prevent a caster from falling off from a leg, and can easily remove a caster or a caster receiver from a leg when it is necessary to remove the caster or a caster receiver. An object is to provide a caster mounting structure.

[0005]

According to the present invention, the above-mentioned problem is solved as follows. (1) A caster in which a caster receiver is fitted into the lower end opening of a leg rod in furniture or the like, and a screw rod of the caster is screwed into a vertical screw hole provided in the caster receiver. In the mounting structure, a caster receiving member is integrally connected from an upper surface of a stopper flange abutting on a lower end opening edge of a leg rod to erect a base fitted into the opening, and a lower surface of the stopper flange. Further, a vertically integrated screw hole is formed to reach the vicinity of the upper end of the base, and a plurality of split grooves are provided from the upper end of the base to the upper surface of the stopper flange.

(2) In the above item (1), the connecting portion is provided with an annular groove so that the base portion is thin at the connecting portion with the stop flange.

(3) In the above item (1), it is assumed that the diameter of the base is gradually reduced so that the lower half of the base is directed toward the connecting portion with the stop flange.

(4) In any one of the above items (1) to (3), the base portion has a plurality of vertical ridges protruding from an outer surface thereof.

(5) In the above item (4), the outwardly projecting width of the ridge protruding from the outer surface of the base of the caster receiver is larger at the upper end than at the lower end located on the stop flange side. Alternatively, the protrusion width of the ridge is the same, and the diameter of the base of the caster receiver is increased at the upper end from the lower end located on the locking flange side.

(6) In any one of the above items (1) to (5), when the upper surface of the stopper flange of the caster receiver is brought into contact with the lower edge opening edge of the leg which is inclined with respect to the floor surface. The upper surface is inclined so that the lower surface of the collar is horizontal, and a base substantially perpendicular to the upper surface is erected on the upper surface, and substantially perpendicular to the lower surface, near the upper end of the base from the lower surface. A vertical screw hole is provided to reach.

[0011]

1 (a) to 1 (d) are drawings for explaining a caster mounting structure of the present invention.
(a) The figure shows before the caster (1) is mounted on the leg (2).
(b) is a state in which the caster receiver (3) is being fitted to the leg (1), and (c) is a state in which the caster receiver (3) has been fitted to the leg (1). (d) is a side view showing a state in which the caster (1) is completely attached to the leg (1) via the caster receiver (3), and the lower part of the leg (1) is partially broken. Shown.

The caster (1) is a caster receiver (3)
And is attached to the leg rod (2) via.

The leg (2) is usually made of a round tube or a square tube, and its lower end is open (4).

FIG. 2 is a front view of the caster receiver (3) when the leg rod (2) is a round tube, FIG. 3 is a plan view thereof, and FIG.
Is the caster receiver (3) when the leg (2) is a square tube
FIG. 5 is a plan view of FIG.

The caster receiving member (3) is formed from the upper surface of a stopper flange (5) that can abut the edge of the lower end opening (4) of the leg rod (2).
This is a plastic molded product in which a base (6) that can fit inside (4) is integrally erected.

A vertical screw hole (7) extending from the lower surface of the collar (5) to the vicinity of the upper end of the base (6) is formed in the collar (5) and the base (6).
And a plurality of split grooves (8) extending from the upper end of the base (6) to the upper surface of the retaining collar (5) are provided.

An annular groove (9) is provided in the base (6) at a portion where the base (6) is connected to the collar (5).

The upper end of the base (6) is chamfered (10). The upper end of the outer surface of the base (6) excluding the chamfer (10) extends vertically from the upper end of the annular groove (9). A plurality of ridges (11) are provided.

In order to attach the caster receiver (3) to the leg (2), first, as shown in FIG. 1, the outer diameter of the leg (2) including the ridge (11) must be equal to the opening (4) of the leg (2). The caster receiver (3) having a diameter substantially equal to or slightly larger than the diameter of the caster holder (3) is obtained by narrowing the upper end of the base (6) by the width of the dividing groove (8) (FIG. (B)). Connect the base (6) of the tool (3) to the lower end opening (4) of the leg (2).
Then, until the upper surface of the flange portion (5) comes into contact with the edge of the lower end opening (4), it is fitted (FIG. (C)).

At this time, since the base portion (6) is thin due to the presence of the annular groove (9) at the connecting portion with the stop collar (5), the base portion (6) is held between the right and left by a finger. When pressed, the base
(6) is bent at the part of the dividing groove (8), and the upper end thereof can be easily narrowed.

Further, the presence of the chamfer (10) on the upper edge of the base (6) facilitates the initial work of fitting the caster receiver (3) to the leg (2).

After fitting the caster receiver (3) to the leg (2), the caster (1) is mounted on the leg (2) via the caster receiver (3).

The caster (1) has an upwardly projecting screw rod (1).
When the screw rod (12) is screwed into the screw hole (7) of the caster receiver (3) from below, the caster receiver
The upper end of the base (6) of (3) is gradually expanded in diameter.

In response to the diameter increase, the side surface of the base portion (6) or the ridge (11) protruding from the side surface is strongly pressed against the inner surface of the lower end opening (4) of the leg rod (2). Are, casters (1)
Is firmly attached to the leg (2) via the caster receiver (3) (FIG. (D)).

The width of the plurality of ridges (11) protruding from the outer surface of the base (6) of the caster receiver (3) in the outward direction is adjusted to the lower end positioned on the side of the stopper (5). If the screw rod (12) of the caster (1) is screwed into the screw hole (7) of the caster receiver (3), the ridge (11) will be larger than the upper end. The force pressed against the inner surface of the lower end opening (4) of the rod (2) is further increased, and the caster (1) can be firmly attached to the leg rod (2).

The protrusions (11) have the same width in the outward direction, and the base (6) of the caster receiver (3) is connected to the stop flange (5).
The same effect can be obtained even if the diameter is increased at the upper end from the lower end located on the side.

On the other hand, when it is desired to remove the caster receiver (3) from the leg (2), for example, the caster (1) is
When the caster receiver (3) fitted to the leg (2) is once removed during the work of attaching to the (2), or after the caster (1) is attached to the leg (2) and used for a long time, The operation for removing the caster receiver (3) for repair or the like can be easily performed.

That is, as shown in FIG.
Loosen the screw rod (12) into the screw hole (7) in (1), and caster receiver for the lower end opening (4) of the leg rod (2).
When the caster (1) is pulled downward in a state where the gripping degree of (3) is reduced (FIG. (A)), the caster receiver (3) is moved to the upper end of the threaded rod (12) of the caster (1). Can be easily removed from the leg rod (2) in the state of being screwed into (FIG. (B)).

FIG. 7 is a caster receiver according to the present invention.
It is a front view which shows another embodiment of (3), and is a drawing corresponding to FIG.

As shown in the figure, the lower half of the base (6) is tapered so that its diameter gradually decreases toward the connecting portion (13) with the stop collar (5).

With this configuration, the work of fitting the caster receiving member (3) to the lower end opening (4) of the leg (2) becomes easy, and the caster receiving member (3) is connected to the leg (2). ) Can be easily removed.

The caster mounting structure of the present invention can be applied not only when the legs of furniture or the like are perpendicular to the floor, but also when they are inclined with respect to the floor. it can.

FIG. 8 is a side view showing one embodiment.

As shown in the figure, the upper surface (14) of the stopper collar (5) of the caster receiver (3) is provided with a leg rod inclined with respect to the floor surface (15).
When the upper surface (14) is inclined with respect to the lower surface (16) so that the lower surface (16) of the stop flange (5) is horizontal when the lower end opening (4) is brought into contact with the edge of (2). A base (6) is erected substantially perpendicular to the upper surface (14), and a vertical screw hole (7) perpendicular to the lower surface (16) is formed from the lower surface (16). It is provided over the upper end of the base (6).

Further, the caster receiver (3) is provided with a leg rod (2).
In order not to rotate around the axis of the stop flange (5)
An upwardly engaging projection (17) is provided at an appropriate position on the upper surface of the leg, and the upwardly extending notch (18) is provided at the lower end of the leg rod (2).
It can fit inside.

By adopting such a form, the caster
The screw rod (12) in (1) is always perpendicular to the floor surface, and the caster (1) rotates smoothly around the screw rod (12), so that the direction can be easily changed.

[0037]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, it is possible to effectively prevent the caster from falling off from the leg rod. Therefore, when moving or using furniture, shopping carts, etc., the casters collide with walls, pillars, shoes, etc., and fall off. It is possible to prevent the casters from easily falling off. In addition, since the casters and the caster receivers can be easily removed from the leg rods, repairs and replacement of the casters and the caster receivers can be efficiently performed.

According to the second aspect of the present invention, since the base portion is thin at the connection portion with the stop collar portion, the upper end of the base portion can be easily narrowed, and the caster receiving member can be easily connected to the leg rod. The work of fitting into the lower end opening of the can be efficiently performed.

According to the third aspect of the invention, the same effects as those of the second aspect of the invention can be obtained.

According to the fourth aspect of the present invention, since the plurality of ridges are pressed against the inner surface of the lower end opening of the leg with a certain degree of elasticity, the caster receiving member is less likely to fall off from the leg. Even if the lower end opening is widened over time, the ridges are enlarged in a range where the elasticity acts, thereby preventing the caster receiver from falling off.

According to the fifth aspect of the present invention, in response to the threaded rod of the caster being screwed into the screw hole of the caster receiver, the caster receiver is more firmly opened at the lower end of the leg rod. The casters are effectively prevented from falling off from the legs.

According to the sixth aspect of the present invention, the caster mounting structure of the present invention is applied to the case where the lower part of the leg is inclined outward so as to prevent furniture or a shopping cart from falling down. be able to.

[Brief description of the drawings]

FIG. 1 is a view for explaining a caster mounting structure of the present invention. FIG. 1 (a) is an exploded view of a leg rod, a caster receiver, and a caster, and FIG. 1 (b) is a caster. The drawing in which the receiving tool is being fitted to the leg rod, (c) is a state in which the caster receiving tool has been fitted to the leg rod, and (d) is a drawing in which the caster is fitted to the leg rod via the caster receiving tool. It is a drawing showing the state where attachment was completed.

FIG. 2 is a side view of a caster receiver according to the present invention.

FIG. 3 is a plan view of the caster receiver shown in FIG.

FIG. 4 is a side view of a caster receiver according to another embodiment of the present invention.

FIG. 5 is a plan view of the caster receiver shown in FIG.

FIG. 6 is an explanatory view in a case where a caster and a caster receiver are removed from a leg rod in the present invention.

FIG. 7 is a side view of a caster receiver according to another embodiment of the present invention.

FIG. 8 is a view illustrating an embodiment of a caster receiver used when the present invention is applied to a leg rod inclined with respect to a floor surface.

FIG. 9 is a drawing showing a conventionally known caster mounting structure.

[Explanation of symbols]

 (1) Caster (2) Leg rod (3) Caster holder (4) Opening (5) Stop collar (6) Base (7) Screw hole (8) Split groove (9) Ring groove (10) Chamfer (11) Ridge (12) Screw rod (13) Connecting part (14) Upper surface (15) Floor surface (16) Lower surface (17) Engagement projection (18) Notch facing upward (a) Leg rod (b) Opening (c) Caster Receiver (d) Mounting hole (e) Caster (f) Vertical rotating shaft (g) Rotating support shaft (h) Mounting fitting portion

Claims (6)

[Claims] 1. A caster mounting in which a caster receiving member is fitted into a lower end opening of a leg rod, and a screw rod of the caster is screwed into a vertical screw hole provided in the caster receiving member. In the structure, the caster receiving member is integrally connected from the upper surface of the stopper flange abutting on the lower edge opening edge of the leg rod to form a base fitted into the opening, and the lower surface of the stopper flange is provided. While forming a vertical screw hole reaching the vicinity of the upper end of the base, from the upper end of the base,
A caster mounting structure for furniture or the like, characterized in that it is an integrally molded plastic product provided with a plurality of split grooves reaching the upper surface of the stop flange. 2. The caster mounting structure for furniture or the like according to claim 1, wherein the base portion has an annular groove provided in the connecting portion so as to be thin at the connecting portion with the stop flange. 3. The caster mounting structure for furniture and the like according to claim 1, wherein the base portion has a lower half portion whose diameter is gradually reduced toward a connecting portion with the stop flange. 4. The caster mounting structure for furniture or the like according to claim 1, wherein the base has a plurality of vertical ridges projecting from an outer surface thereof. 5. A projecting width of the ridge protruding from the outer surface of the base of the caster receiving member in an outward direction is set to be larger at an upper end than at a lower end located on a stop flange side, or the ridge is formed. The caster mounting structure for furniture or the like according to claim 4, wherein the projection width of the casters is the same, and the diameter of the base of the caster receiver is increased from the lower end located on the stop flange side to the upper end. 6. When the upper surface of the stopper collar of the caster receiver is brought into contact with the lower edge opening edge of the leg that is inclined with respect to the floor surface,
The upper surface is inclined so that the lower surface of the retaining collar is horizontal, and a base portion that is substantially perpendicular to the upper surface is erected on the upper surface, and substantially perpendicular to the lower surface, from the lower surface near the upper end of the base portion. The caster mounting structure for furniture and the like according to any one of claims 1 to 5, wherein a vertical screw hole is provided to reach the vertical direction.