JP5853535B2 - bed - Google Patents

Description

  The present invention relates to a bed in which casters can be attached to legs.

  2. Description of the Related Art As a conventional bed, there is known a leg caster structure including a caster main body including wheels and an attachment shaft, a caster main body attachment portion, and an attachment box for attachment to the leg portion. The bed is configured by fitting the mounting box to a horizontally extending cylindrical opening leg, aligning the mounting hole formed in the leg with the fixing hole drilled in the mounting box. The caster body can be attached to the leg by inserting a screw from the outside of the part to the inside of the attachment box and screwing the leg and the attachment box (for example, Patent Document 1).

JP-A-9-240204

  However, in patent document 1, the opening part of a leg part will be exposed before a caster attachment. For this reason, it will be in the state where the design property is not good by bare, and the countermeasure for preventing an injury is needed when a user hits.

  In addition, when the leg part is a general distribution square pipe, the accuracy of the R part of the corner part of the square pipe is lower than that of the other parts. The clearance between the pipe and the mounting box is increased. For this reason, there is a difference between the position of the mounting hole drilled in the square pipe and the position of the fixing hole drilled in the mounting box, and there is a problem that it takes time and effort to align the mounting hole and the fixing hole.

  Therefore, the present invention has been made in view of the above problems, and has designability and safety even when non-casters are mounted, and the caster mounting can be performed by suppressing the positional deviation between the mounting holes and the fixing holes. The purpose is to provide an easy bed.

The problem-solving means of the present invention includes a caster having a wheel and a mounting shaft, a square pipe having a cylindrical opening having a mounting hole formed at a mounting position of the caster, and the square pipe having the opening. A bed comprising a caster fixing adapter, wherein the caster fixing adapter closes the fixing hole for fixing the mounting shaft and the opening, and positions the fixing hole in the longitudinal direction of the square pipe. guide and the cap, the inner surface of the square pipe has a guide mechanism for at least one of the positioning of the vertical and horizontal directions of the fixing hole, wherein the guide mechanism includes a side surface of the caster fixed adapter projections der has a first protrusion that are a part is positioned in the vertical direction of the upper end, the bent portion formed on the side of the caster fixing adapter Ri said A second protrusion which in the right direction positioning, of a structure having at least any one.

  Moreover, it is good for the said projection part to set it as the structure by which a corner | angular part exhibits circular arc shape.

  The mounting shaft may have a male screw portion, the fixing hole may have a female screw portion, and the male screw portion and the female screw portion may be screwed together to fix the caster. .

  In the bed of the present invention, since the caster fixing adapter includes the end cap, the opening of the square pipe is closed even when the caster is attached, and safety and design are obtained. Furthermore, the caster fixing adapter allows the end cap to be positioned in the longitudinal direction of the square pipe by attaching the end cap to the opening of the square pipe, and the guide mechanism guides the inner surface of the square pipe so that Positioning in at least one of the direction and the left-right direction. Therefore, the positional deviation between the mounting hole and the fixing hole can be suppressed, and the caster can be easily attached.

  In addition, since the guide mechanism is a protrusion formed by bending the side surface of the caster fixing adapter, the guide mechanism can be easily processed without increasing the number of parts.

  Moreover, since the corner | angular part of a projection part exhibits circular arc shape, when attaching the adapter for caster fixation to the opening part of a square pipe, a projection part can guide the inner surface of a square pipe smoothly.

  Further, the caster can be easily attached and detached without increasing the number of parts by screwing the male screw part of the mounting shaft and the female screw part of the fixing hole to fix the caster.

It is a perspective view of the bed of the present invention. It is an assembly drawing of the leg part of the bed shown in FIG. FIG. 3 is a perspective view of a caster fixing adapter shown in FIG. 2. It is AA sectional drawing of the state which attached the adapter for caster fixation shown in FIG. 3 to the opening part of the square pipe.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a perspective view of a bed 1 of the present invention. The bed 1 is composed of legs 2, a headboard 3, a foot board 4, and a floor plate 5 that can be raised and lowered. The leg 2 includes a square pipe 10, a caster 20 attached to the square pipe 10, and a caster fixing adapter 30 attached to the square pipe 10.

  FIG. 2 is an assembly view of the leg 2 of the bed 1 of the present invention. The square pipe 10 is made of metal and is a general-purpose product that is generally distributed, and has a cylindrical shape and an opening 11. A mounting hole 12 is formed at a position where the caster 20 is attached. The caster 20 is a general-purpose caster including a wheel 21 and an attachment shaft 22, and a male screw portion 23 is formed on the attachment shaft 22. The caster fixing adapter 30 includes a screw hole 32 (fixed hole) in which a female screw portion 31 is formed and screwed with the male screw portion 23, and closes the opening portion 11 to position the square pipe 10 in the longitudinal direction of the screw hole 32. A first protrusion 34 (guide mechanism) that guides the end cap 31 and the inner surface 13 of the square pipe 10 to position the screw hole 32 in the vertical direction, and a second protrusion that positions the screw hole 32 in the left-right direction. 35 (guide mechanism).

  FIG. 3 is a perspective view of the caster fixing adapter 30 of the present invention. The second protrusion 35 is formed by bending right and left so that the side surface 36 of the caster fixing adapter 30 is guided by the inner surface 13 of the square pipe 10. A corner 37 of the first protrusion 34 and a corner 38 of the second protrusion 35 have an arc shape. The screw hole 32 is a metal cylindrical body fixed to the bottom surface of the caster fixing adapter 30, and has an internal thread portion 31 formed therein, and is screwed with the external thread portion 23 to attach the mounting shaft 22 of the caster 20. Fix it. In addition, although the screw hole 32 is the structure which forms the internal thread part 31 inside a cylindrical body, you may form an internal thread part by burring process.

  FIG. 4 is a cross-sectional view taken along the line AA of the caster fixing adapter 30 attached to the opening 11 of the square pipe 10. The first protrusion 34 avoids the R portion above the square pipe 10 and positions the screw hole 32 in the vertical direction with a predetermined gap from the upper surface of the inner surface 13. Similarly, the second projecting portion 35 avoids the R portion of the square pipe 10 and positions the screw hole 32 in the left-right direction with a predetermined gap from the right side surface and the left side surface of the inner surface 13. The screw hole 32 is positioned coaxially with the mounting hole 12 by the first protrusion 34, the second protrusion 35, and the end cap 31.

  Hereinafter, attachment of the caster fixing adapter 30 to the square pipe 10 and attachment of the casters 20 in the above configuration will be described. First, the caster fixing adapter 30 is inserted from the opening 11 of the square pipe 10. The caster fixing adapter 30 has a bottom surface on which the screw hole 32 is provided. While the caster fixing adapter 30 is guided by the first protrusion 34 and the second protrusion 35, the inner surface 13 of the square pipe 10 is inserted in the longitudinal direction until the end cap 33 contacts the opening 11 of the square pipe 10. Is done.

  Then, with the end cap 33 and the opening 11 in contact with each other, the mounting shaft 22 of the caster 20 is inserted into the mounting hole 12 from below the square pipe 10 upward. At this time, the mounting hole 12 and the screw hole 32 are coaxial. The caster 20 is fixed by rotating the mounting shaft and screwing the male screw portion 23 and the female screw portion 31 together.

  Hereinafter, the effect in this invention is demonstrated.

  In the bed 1, since the caster fixing adapter 30 includes the end cap 33, the opening 11 of the square pipe 10 is closed even before the caster is attached (non-caster attachment), and safety and design are obtained. Furthermore, the caster fixing adapter 30 positions the square pipe 10 in the longitudinal direction of the screw hole 32 by attaching the end cap 33 to the opening 11 of the square pipe 10, and the first projection 34 and the second projection 35 is guided by the inner surface 13 of the square pipe 10, whereby the screw hole 32 is positioned in the vertical direction and the horizontal direction. Therefore, the positional deviation between the mounting hole 12 and the screw hole 32 can be suppressed, and the caster 20 can be easily attached.

  Further, by forming the second protrusion 35 by bending the side surface 36 of the caster fixing adapter 30, the second protrusion 35 can be easily processed without increasing the number of parts.

  Further, since the corner portions 37 and 38 of the first projection portion 34 and the second projection portion 35 have an arc shape, when the caster fixing adapter 30 is attached to the opening portion 11 of the square pipe 10, the corner pipe 10 smoothly Guided by the inner surface 13.

  In addition, the caster 20 can be easily attached and detached without increasing the number of parts by adopting a structure in which the caster 20 is fixed by screwing the male threaded portion 23 of the mounting shaft 22 and the female threaded portion 31 of the screw hole 32. become.

1 bed 10 square pipe 11 opening 12 mounting hole 20 caster 21 wheel 22 mounting shaft 23 male screw part 30 caster fixing adapter 31 female screw part 32 screw hole (fixing hole)
33 End cap 34 First protrusion (guide mechanism)
35 Second protrusion (guide mechanism)

Claims (3)

A caster having wheels and a mounting shaft;
A square pipe having a hole in the mounting position of the caster and having an opening,
A bed having a caster fixing adapter attached to the opening of the square pipe,
The caster fixing adapter is:
A fixing hole for fixing the mounting shaft;
An end cap for closing the opening and positioning the fixing hole in the longitudinal direction of the square pipe;
A guide mechanism that guides the inner surface of the square pipe and positions at least one of the fixing hole in the vertical direction and the horizontal direction;
The guide mechanism is
A first protrusion that is a part of an upper end of a side surface of the caster fixing adapter and that is positioned in the vertical direction;
A second protrusion for positioning protrusions der Ri the lateral direction with the bend formed on the side surface of the caster fixing adapter,
A bed having at least one of the following .   The bed according to claim 1, wherein the protrusion has an arc shape at a corner. The mounting shaft has a male thread portion,
The fixing hole has a female screw portion,
The bed according to any one of claims 1 and 2, wherein the male screw part and the female screw part are screwed together to fix the caster.

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