JP2928112B2 - Bed leg - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed leg for easily sliding and moving a bed when necessary.

[0002]

2. Description of the Related Art There are cases where it is desired to move a bed for cleaning or other purposes. However, it is usually not easy to move the bed alone because the weight of the bed itself is large. In particular, it is difficult to move a bed while a bedridden or sick person remains on the bed. For this reason, casters in which a caster is attached under a leg of a bed to facilitate movement of the bed are often used. However, casters use large-diameter wheels, so the height of the bed is high.In addition, when moving, the wheels may turn in the free direction and not move smoothly as desired, or when used at home, Since the contact area of the wheel is small (it becomes linear), there are problems such as damage to the tatami mat and the floor, and it is not always satisfactory.

[0003]

Therefore, the present invention is extremely simple in structure, can smoothly move the bed in the desired direction, and can be installed at a low mounting height. An object of the present invention is to provide a bed leg that does not damage the surface.

[0004]

According to the present invention, in order to solve the above-mentioned problems, according to the first aspect of the present invention, there is provided a shaft portion which is suspended from a lower portion of a leg of a bed, A sliding member having a sliding ground surface formed at a lower end of the portion; a sliding member that covers the sliding member and is fitted to the shaft portion so as to be able to move up and down; a non-slidable ground surface is formed at a lower end; A leg body that can be displaced below the ground contact surface, and lifting means for vertically moving the leg body so as to be vertically displaced with respect to the sliding member;
An operating member operable to operate the lifting / lowering means to vertically displace the leg seat body, wherein the lifting / lowering means is screwed into a shaft, and screwed into the screw. an operating member having the inner peripheral screws which consists of a pivotally linked leg seat body to the operation member takes the following technical means of. Further, in the invention of claim 2, wherein the lifting means comprises a spring for upwardly urging the Ashiza body, Misao
A technical means is provided in that it comprises a cam means formed on an abutment surface between the working member and the leg seat body and displacing the leg seat body downward.

[0005]

When the user wants to move the bed, the operating member is turned in a predetermined direction to displace the sliding member below the level of the non-slidable fixing surface fixed to the lower end of the leg body. Thus, the bed can be supported only by the sliding member, and in this state, the bed can be easily slid in any direction. When the bed is to be fixed at a predetermined position, the sliding member is displaced by rotating the operating member in the opposite direction so that the sliding member is higher than the level of the non-sliding fixing surface at the lower end of the leg seat body. Is supported only by the leg body, so that the bed can be stably fixed at a predetermined position.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bed leg according to the present invention; FIG. 1 shows a first embodiment of a bed leg attached to a lower portion of a bed leg, particularly showing a state in which the position of the bed is fixed. FIG. 2 shows the bed leg of FIG. FIG. 3 shows a state when the bed is moved on the bed leg of FIG. 1 when viewed from above.

[0007] This bed leg uses screw advance / retreat as a lifting / lowering means, and has a screw body 11 protruding downward at the lower end, and is connected to the lower part of the bed leg. A leg connecting member 12, a column member 13 protruding downward from a lower end of the screw body 11, and a sliding member 14 detachably fitted to the lower end of the column member 13.
And an operating member 17 which is screwed with the screw body 12 so as to be rotatable therearound, and which has a fitting projection 16 formed on the lower surface thereof to form an annular groove 15 on the peripheral surface thereof, and a fitting of the operating member 17. A leg body 19 having an engaging portion 18 that engages with the joint projection 16
And a non-slidable fixing member 20 fixed to the lower end of the leg body 19.

More specifically, a thread groove 12 a is formed on the peripheral surface of the screw body 11 of the leg connecting member 12,
a has a flange portion 12b that protrudes in the circumferential direction at the upper end. The support member 13 protrudes coaxially downward from the lower end of the screw body 11, and an annular groove 13a is formed on the peripheral surface near the protruding end.

The sliding member 14 has an outer peripheral surface having a recess 14 at the center.
a is formed in a substantially hemispherical shape, and a support member 1
A cylindrical body 14b into which the third member 3 is inserted is projected upward, and an annular rib 14c provided on the inner surface thereof is fitted to the annular groove 13a of the column member 13 so as to be fixed to the column member 13. The support member 13 can be detached from the support member 13 by releasing the engagement with the annular groove 13a. Further, the sliding member 14 is subjected to a lubrication treatment such as Teflon processing so that the lower surface (ground contact surface) is easily slipped on a floor or a fold made of a plate, a synthetic resin or the like, or is entirely made of a material having a high lubricity. ing.

The operating member 17 has a substantially cylindrical shape (in the illustrated example, the inner cylindrical body and the outer cylindrical body are integrated), and a thread groove on the peripheral surface of the screw body 11 is formed on the inner wall surface. 12a
A screw groove 17a screwed with the screw body 11 is formed, and by rotating around the screw body 11, the screw body 11 can be moved up and down. In order to facilitate the rotation of the operation member 17, for example, four arm-shaped projections 17b extending in directions different from each other by 90 degrees as shown in FIG. 2 may be provided. A circular recess 17c is formed on the upper surface of the operation member 17 to be fitted with the flange portion 12b at the upper end of the screw groove 12a, and a fitting projection 16 forming an annular groove 15 on the outer peripheral surface is formed on the lower surface so as to project downward. Have been.

The leg body 19 has a cylindrical shape (or a substantially eight-shaped cross section) that expands downward, and is provided below the operating member 17 so as to cover the sliding member 14, and has an upper edge portion. The annular engaging portion 18 extends horizontally inward, and the annular engaging portion 18 is slidably engaged with the annular groove 15 of the fitting projection 16 of the operation member 17. That is, the operation member 17 can freely rotate on the annular engagement portion 18. Thus for rotating the operating member 17 smoothly, it may be a plurality of steel bearing balls 21 interposed annularly between the lower surface and the annular engagement portion 18 near the upper surface of the operating member 17 as shown .

The non-slidable fixing member 20 is formed of an annular block made of a non-slip material such as soft resin or rubber, and is fixed from the lower end to the inner surface of the leg body 19. As shown in the figure, the lower surface 20a of the non-slippery fixing member 20 may be formed in an uneven shape in order to make the non-slippery fixing member more slippery.

Next, the operation of the bed leg seat having the above configuration will be described. In the state of FIG. 1, the operation unit
Due to the rotation of the member 17, the entire leg connecting member 12, the support member 13, and the sliding member 14 move upward integrally, and therefore, the non-sliding fixing member 20 comes into contact with the floor surface and becomes less slippery. Is in a fixed state.

When it is desired to move the bed from this fixed state, first, when the operating member 17 is rotated in a predetermined direction, the leg connecting member 12 and the column member 1 are connected via the screw body 11.
3 and the entire sliding member 14 begin to move integrally downward, the sliding member 14 comes into contact with the floor surface 22, further pulls the non-slidable fixing member 20 upward from the floor surface, and at the same time, the flange of the leg connecting member 12. Since the lower surface of the portion 12b is in contact with the lower surface of the circular recess 17c on the upper surface of the operation member 17, the non-slidable fixing member 20 is prevented from further rising. Thus, since the bed is supported only by the sliding member 14, the bed can be easily moved in any direction by simply pushing.

After the bed has been moved to the predetermined position,
By rotating the operation member 17 in the opposite direction, the sliding member 14 is moved up again and returned to the state shown in FIG. 1, whereby the bed can be fixed at a predetermined position.

FIG. 4 shows a second embodiment of the bed leg. This bed leg shows a different embodiment in which the leg base body 19 urged upward by a spring is displaced up and down by a cam, instead of a structure in which the leg base body 19 is moved up and down by screw advance / retreat by screws. That is, the leg connecting member 12 is
The lower part has a small diameter, the hollow shaft part 12c protrudes, and a sliding member 14 serving as a shoe is fixed to the tip. In the illustrated example, the sliding member 14 is covered at its lower end with a slippery cap whose outer surface is a slidable grounding surface.

An operating member 27 serving as a handle is rotatably fitted to the shaft portion 12c below the flange portion 12b. Further, the leg seat body 19 is formed of a frusto-conical cylindrical body that expands downward and has a non-slidable fixing member 20 fitted and fixed in a ring shape along the outer periphery below.

The lower edge of the center of the operating member 27 is shown in FIG.
A cam surface 270 indicating a main part is formed. The cam surface 270 is a surface that is uneven up and down.
The side transitioning from 71 to the convex portion 272 is obliquely inclined. The top surface 19a of the leg seat body 19, which is urged upward, abuts against the cam surface 270. That is, the coil spring S is externally fitted to the shaft portion 12c in a compressed state between the inner hollow back surface of the top surface 19a of the leg body 19 and the upper end surface of the leg body 19.

With the above configuration, the operating member 2
7 is rotated by a predetermined angle to align the concave portion 271 with the top surface 19A of the leg seat body 19, the leg body 19 rises by the urging force of the coil spring S, and its bottom surface is displaced to a position higher than the bottom surface of the sliding member 14. Therefore, only the bottom surface of the sliding member 14 contacts the floor surface. Thereby, it is possible to slide on the installation surface via the sliding member 14. Conversely, the operating member 27 is further pivoted by a predetermined angle so that the convex portion 272 is
When it is aligned with the top surface 19 a of the sliding member 14, the leg body 19 is lowered by being pressed by the convex portion 272, and its bottom surface is displaced below the bottom surface of the sliding member 14. As a result, the bottom surface of the sliding member 14 is held hollow, and only the bottom surface of the leg body 19 is grounded.

In the present invention, the structure for vertically moving the leg seat body up and down with respect to the sliding member is not limited to the above-mentioned embodiment, and known lifting means can be used. Others
In short, it goes without saying that various design changes can be made without departing from the scope of the present invention.

[0021]

As described above in detail, according to the bed leg of the present invention, the operation is simply performed by moving the sliding member up and down. It can be fixed stably. Further, the mounting height can be suppressed low, and the height of the bet can be set low. Also, unlike casters, since the contact area with the installation surface is large, even when used at home, the floor surface and tatami mats are not easily damaged. Further, the movement of the bed can be performed easily and smoothly, and particularly when the bed is moved over a short distance, the bed can be slid more stably than the caster, which is extremely useful.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a bed leg according to a first embodiment of the present invention in a state where the bed is fixed in position.

FIG. 2 is a plan view of the bed leg shown in FIG. 1 when viewed from above.

FIG. 3 is a sectional view of a main part when the position of the bed of the bed leg shown in FIG. 1 is moved.

FIG. 4 is a sectional view of a bed leg for a second embodiment.

FIG. 5 is a partial view illustrating a cam surface.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Screw body 12 ... Leg connection member 13 ... Post member 14 ... Sliding member 15 ... Annular groove 16 ... Fitting projection 17 , 27 ... Operating member 18 ... Engaging part 19 ... Leg seat body 20 ... Non-sliding fixing member 21 ... Steel bearing ball

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-107034 (JP, A) JP-A-63-122407 (JP, A) JP-A-59-53201 (JP, A) 70402 (JP, U) Fully open 48-56163 (JP, U) Fully open, 49-139149 (JP, U) Fully open, 53-64057 (JP, U) Fully open, 56-93306 (JP, U) 3-22003 (JP, Y2) 48-12308 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60B 33/00-33/08 A47B 91/06

Claims (2)

(57) [Claims] A shaft portion hanging down from the shaft portion and connected to a lower portion of a leg of the bed; a sliding member having a sliding ground surface formed at a lower end of the shaft portion; A leg body that is fitted to the shaft part so as to be able to move up and down freely, a non-slidable ground surface is formed at a lower end, and the ground surface is displaceable below the ground surface of the sliding member; and the leg body is a sliding member. Lifting means for raising and lowering so as to be displaced up and down, and an operating member operable to operate the lifting and lowering means to displace the leg seat body up and down, wherein the lifting and lowering means is and characterized a screw which is engraved on the shaft portion, and the operating member having the inner peripheral screws screwed into the screw, that it is from the pivotally linked leg seat body operating member Bed legs. 2. A shaft portion hanging down from the shaft portion and connected to a lower portion of a leg of the bed, a sliding member having a sliding ground surface formed at a lower end of the shaft portion, and a cover member covering the sliding member. A leg body that is fitted to the shaft part so as to be able to move up and down freely, a non-slidable ground surface is formed at a lower end, and the ground surface is displaceable below the ground surface of the sliding member; and the leg body is a sliding member. Lifting and lowering means for raising and lowering so as to be displaced up and down, and an operating member operable to operate the lifting and lowering means to displace the leg seat body up and down, wherein the lifting and lowering means comprises: 2. A spring for urging the leg body upward, and cam means formed on an abutting surface between the operating member and the leg body to displace the leg body downward. The leg for a bed according to 1.