JP3987416B2 - Caster mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a caster mounting structure that is provided at the lower end of a leg tube of furniture, a shopping cart, or the like and that allows the furniture or the like to be stably rotated or moved.
[0002]
[Prior art]
Conventionally, the caster mounting structure is generally such that a caster holder made of plastic or the like is press-fitted into an open end of furniture or the like, and a vertical support shaft in the caster is inserted into an installation hole provided in the caster holder, or A caster is attached by screwing (for example, Utility Model Document 1).
However, the above-described mounting structure is applied only to a leg tube that is substantially perpendicular or parallel to the floor surface.
[0003]
The reason is that when the caster vertical support shaft is inserted into the caster support attached to the leg pipe inclined with respect to the floor surface, the caster vertical support shaft tilts in the same direction as the leg pipe. This is because the rotation around the vertical support shaft is hindered and the caster cannot change direction.
[0004]
However, when the leg tube is limited to be perpendicular or parallel to the floor surface, the degree of freedom in designing the leg portion is limited. In addition, when the leg tube is limited to a vertical one with respect to the floor surface, the space between the front and rear leg tubes and casters cannot be widened, so that the stability of furniture and the like is deteriorated.
[0005]
In response to this problem, the applicant of the present application has previously proposed a caster mounting structure that can be applied to a leg pipe inclined with respect to the floor surface (utility model document 2).
That is, as shown in FIG. 10, the upper surface of the caster support (04) fitted in the lower end opening (03) of the leg pipe (02) inclined with respect to the horizontal floor surface (01) When (05) is brought into contact with the lower end surface (06) of the leg tube (02), the upper surface (05) is inclined so that the lower surface (07) is horizontal, and at an appropriate position on the upper surface (05). Provided with a flange portion (010) having an engaging projection (08) and a mounting hole (09) that is perpendicular to the lower surface (07) from the lower surface (07), the caster support (04) An upward notch (012) provided in the lower end opening (03) of the inclined leg tube (02) and provided with the engaging projection (08) at the lower end (011) of the leg tube (02) By fitting and locking in, the caster support (04) is attached to the leg pipe (02) with its lower surface (07) horizontal, and the support hole (09) is vertically supported on the caster. A caster mounting structure in which a shaft (013) is inserted and mounted.
[0006]
However, according to this device, when the inclination angle of the leg tube (02) is larger than a certain level, the lower end opening (014) of the mounting hole (09) protrudes from the lower surface (07) of the flange (010). It cannot be applied.
[0007]
[Utility model document 1]
Japanese Utility Model Publication No. 55-32509 [Utility model document 2]
Japanese Utility Model Publication No. 8-5630 [0008]
[Problems to be solved by the invention]
In view of the above-described situation, the present invention can support furniture including leg tubes having a large inclination angle with respect to the floor surface so as to be able to move stably and smoothly, and the degree of freedom in designing the leg portions of the furniture. An object of the present invention is to provide a caster mounting structure capable of increasing the height.
[0009]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) A caster receiver comprising a shaft portion that is inserted into a lower end opening of a leg tube that is inclined with respect to the floor surface, and a flange that is extended from the lower end surface of the shaft portion and has a diameter larger than that of the shaft portion. An engagement protrusion is extended from the lower part of the end face on the shaft part side of the flange part toward the shaft part, and a caster attachment surface is formed by the engagement protrusion and the lower part of the flange part. A mounting hole that is orthogonal to the surface and extends from the caster mounting surface to the inside of the shaft portion is provided so that at least a part of the mounting hole is located in the engaging projection, and the lower end opening of the leg tube that inclines the shaft portion The caster receiver is fitted into the upper notch provided on the lower side of the lower end of the leg tube and locked, so that the caster holder is substantially the same as the floor surface. Install in parallel to the leg tube, and insert the vertical support shaft of the caster into the mounting hole. Attached has the caster mounting structures characterized by.
[0010]
(2) In the above item (1), there is a space portion on the peripheral surface of the shaft portion by providing the shaft portion with a plurality of axial groove portions in the peripheral surface and radially recessed around the axis. Form into shape.
[0011]
(3) In the above item (1) or (2), a through hole is provided in the leg tube, and the set screw is screwed into the shaft portion through the through hole.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of a table having the caster mounting structure of the present invention, FIG. 2 is an enlarged front view of the caster receiver in the table caster mounting structure shown in FIG. 1, and FIG. 3 is a plan view of the caster receiver. 4 is a right side view of the caster holder, FIG. 5 is a vertical cross-sectional view taken along the line V-V in FIG. 3, FIG. 6 is a vertical cross-sectional view taken along the line VI-VI in FIG. FIG. 8 is an upper perspective view of the caster receiver, and FIG. 9 is a lower perspective view of the caster receiver and the leg tube.
[0013]
The caster support (1) used in the caster mounting structure of the present invention includes a shaft portion (4) fitted into a lower end opening (3) of a leg tube (2) inclined with respect to the floor surface, It is formed by a flange (6) having a diameter larger than that of the shaft (4) and extending from the lower end surface (5) of the shaft (4).
[0014]
As shown in FIGS. 8 and 9, the shaft portion (4) has a shape in which a plurality of grooves (4a) in the axial direction are formed on the peripheral surface so as to be radially recessed around the axis, and the shaft portion (4) is formed. The caster holder (1) is attached to the leg pipe (2) by being inserted into the lower end opening (5) of the leg pipe (2), and the caster (7) is attached to the lower end of the caster holder (1) (see FIG. 2), it is formed in a sufficient length so as not to cause backlash.
[0015]
Specifically, the shaft portion (4) includes five rectangular shaft plate pieces (8a), (8b), (8c), (8d), and (8e) each having a required length in the axial direction. , One each on the left and right, one on the upper side, two on the lower side in parallel, with one long side edge of each shaft plate piece (8) abutting, so that it is almost cross-shaped, generally radial It is formed in a shape that can be equated with the arrangement.
[0016]
A thick disc-shaped flange portion (6) having a diameter larger than that of the shaft portion (4) extends from the lower end surface (5) of the shaft portion (4).
A wedge-shaped engagement protrusion (10) extends from the lower part of the end surface (9) on the shaft (4) side of the flange (6) toward the shaft (4).
The engaging projection (10) and the lower part of the flange (6) are formed as one plane parallel to the floor surface, and the caster mounting surface (11) is formed with this plane.
[0017]
The caster mounting surface (11) is provided with a mounting hole (12) extending perpendicularly from the caster mounting surface (11) to the inside of the shaft portion (4).
As shown in FIGS. 2, 3, and 9, the mounting hole (12) is provided so that at least a part thereof is positioned in the engagement protrusion (10). By doing so, the shaft portion (4) of the caster receiver (1) according to the present invention is fitted into the lower end opening (3) of the leg tube (2) having a large inclination angle with respect to the floor surface, and the caster receiver is inserted. Even when the tool (1) is mounted, the mounting hole (12) can be held perpendicular to the floor surface.
[0018]
Therefore, by inserting and attaching the vertical support shaft (13) of the caster (7) to the mounting hole (12), the vertical support shaft (13) becomes perpendicular to the floor surface, and the caster (7) The rotation around the vertical support shaft (13) is not obstructed at all, and the direction of the caster can be easily changed.
[0019]
When the caster holder (1) is attached to the leg tube (2), the engaging projection (10) of the caster holder (1) is provided upward on the lower side of the lower end of the leg tube (2). The leg tube is fitted and locked in the notch (14) and positioned so that the caster support (1) does not rotate, and the caster mounting surface (11) is substantially parallel to the floor surface. Attach to (2).
[0020]
Next, as shown in FIGS. 2, 5, and 9, the locking formed between the lower two shaft plate pieces (8 c) and (8 d) in the shaft portion (4) of the caster receiver (1). The caster support (1) is pulled off from the leg tube (2) by inserting the set screw (17) into the hole (15) through the through hole (16) provided in the leg tube (2). Fasten so that there is no.
[0021]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(1) According to the invention described in claim 1, even in the case of a leg tube having a large inclination angle with respect to the floor surface, the vertical support shaft of the caster can be held perpendicular to the floor surface, and the vertical of the caster The rotation around the spindle is not hindered.
Therefore, it is possible to support furniture and the like having leg tubes with a large inclination angle so that they can be moved stably and smoothly, and the design of leg portions of furniture and the like can be freely performed without being restricted by the inclination angle of the leg tube. It can be carried out.
[0022]
(2) According to the invention described in claim 2, since the space portion is present on the peripheral surface of the shaft portion of the caster holder, the frictional resistance when the shaft portion is inserted into the lower end opening of the leg tube is small. Therefore, a relatively long shaft portion can be formed.
By adopting a long shaft part, even when the inclination angle of the leg tube is large and a large load is applied to the shaft part, it is possible to stably hold the caster support on the leg tube and effectively prevent rattling and the like. it can.
[0023]
(3) According to the invention described in claim 3, it is possible to effectively prevent the caster receiver from falling off the leg tube.
[Brief description of the drawings]
FIG. 1 is a perspective view of a table provided with a caster mounting structure of the present invention.
FIG. 2 is an enlarged front view of a caster receiving member in the caster mounting structure of the table shown in FIG.
FIG. 3 is also a plan view of a caster receiver.
FIG. 4 is a right side view of the caster receptacle.
5 is a vertical cross-sectional view taken along the line V-V in FIG. 3;
6 is a longitudinal sectional view taken along line VI-VI in FIG. 2;
7 is a view taken along arrows VII to VII in FIG. 2;
FIG. 8 is a top perspective view of a caster receiver.
FIG. 9 is a lower perspective view of a caster receiver and a leg tube.
FIG. 10 is a view showing a conventional caster mounting structure.
[Explanation of symbols]
(1) Caster bracket
(2) Leg tube
(3) Lower end opening
(4) Shaft
(4a) Groove
(5) Lower end surface
(6) Buttocks
(7) Caster
(8) Shaft plate
(9) End face
(10) Engagement protrusion
(11) Caster mounting surface
(12) Mounting hole
(13) Vertical spindle
(14) Upward notch
(15) Locking hole
(16) Through hole
(17) Set screw
(01) Floor
(02) Leg tube
(03) Lower end opening
(04) Casters
(05) Top view
(06) Lower end surface
(07) Bottom
(08) Engagement protrusion
(09) Mounting hole
(010) Buttocks
(011) Lower end
(012) Upward notch
(013) Vertical support shaft
(014) Lower end opening

Claims (3)

The said cage | basket in the caster holder provided with the axial part inserted in the lower end opening part of the leg pipe which inclines with respect to a floor surface, and the collar part extended from the lower end surface of this axial part and larger diameter than a shaft part. An engagement protrusion is extended from the lower part of the end face of the shaft part side toward the shaft part, and a caster attachment surface is formed by the engagement protrusion and the lower part of the flange part, and is orthogonal to the caster attachment surface Then, an attachment hole extending from the caster attachment surface to the inside of the shaft portion is provided so that at least a part of the attachment hole is located in the engagement protrusion, and is fitted into the lower end opening of the leg tube that inclines the shaft portion. By inserting and engaging the engagement protrusion into an upward cutout provided on the lower side of the lower end of the leg tube, the caster support is made with the caster mounting surface substantially parallel to the floor surface. Attach to the leg tube, and insert the vertical support shaft of the caster into the mounting hole. Caster mounting structure, characterized in that the. The shaft portion is formed in a shape in which a space portion is present on the peripheral surface of the shaft portion by providing a plurality of axial groove portions on the peripheral surface in a radial manner around the axis. The caster mounting structure according to Item 1. The caster mounting structure according to claim 1 or 2, wherein a through hole is provided in the leg pipe, and a set screw is screwed into the shaft portion through the through hole.

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