JP3524736B2 - Folding bed equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding bed apparatus capable of folding a frame in two.

[0002]

Bed devices are inconvenient because they occupy a large indoor space when not in use. Therefore, various bed devices have been developed that do not occupy a large indoor space when not in use. One of them is a bed device in which the bed frame can be folded into a mountain shape from a middle portion in the longitudinal direction when not in use.

As such a bed device, the actual device is KOKAI Shosho 50.
The structure shown in Japanese Patent No. 22890 is known. The bed apparatus disclosed in this publication has an underframe (frame) divided into two. One end of these underframes is foldably connected by a supporting leg. Wheels are provided at the other end of one underframe, and the other end of the other underframe is rotatably connected to the floor plate via a supporting leg.

Springs are stretched between the supporting legs connecting one end of the pair of underframes and the other end of each underframe, and urge the pair of underframes in the direction of folding in a mountain shape. There is. The biasing force of this spring and the weight of the underframe are almost balanced. As a result, the pair of underframes are held in a substantially horizontal state, but when folding, by lifting the part of the supporting leg that connects one end of the pair of underframes, the restoring force of the spring causes a slight force It can be folded into a shape.

When the pair of underframes are folded, one underframe with wheels is moved in a direction of joining to the other underframe standing upright almost vertically on the floor board. Can be folded such that their lower surfaces face each other.

When the pair of underframes is deployed substantially horizontally, a bedclothes such as a mattress is placed on the upper surface of each underframe, and the weight of the bedding causes the pair of underframes to move in the standing direction due to the restoring force of the spring. It does not rotate easily.

However, if the pair of underframes are simply held horizontally by the balance between the restoring force of the spring and the weight of the underframe, the underframe will move upward when an inadvertent external force is applied to the underframe. Not only may it rotate, but it may be difficult to use because the horizontal state is not stable.

When the underframe is folded, the restoring force of the spring biasing the underframe in the folding direction becomes almost zero. Therefore, since the folded state of the underframe is not reliably maintained, it may be displaced from the standing state in the fall direction due to an inadvertent external force.

[0009]

As described above, the conventional folding bed apparatus is maintained in a state in which the pair of frames are deployed horizontally or in a state in which they are erected substantially vertically and folded. Since it was not so, there were times when the stability in each state was poor.

According to the present invention, the pair of frames are in a horizontally expanded state or in a substantially vertically standing and folded state,
It is an object of the present invention to provide a foldable bed apparatus capable of reliably maintaining the state and easily releasing the state.

[0011]

According to a first aspect of the present invention, in a folding bed apparatus capable of being folded in half from a midway portion in a longitudinal direction, a first supporting leg is rotatably provided at one end portion. A first frame, a second frame having a second support leg movably provided at one end, and the other ends of the first frame and the second frame. The pair of links each having one end connected to each other, and the other end of each of the pair of links rotatably connected to each other with the same fulcrum, and the first and second support legs include the first and second frames. An intermediate support leg that supports the frame in a substantially horizontal state and is foldable with the other end of the link as a fulcrum such that the first frame and the second frame face each other at their lower surfaces. Is rotatably connected to the first support leg and the other end is rotatably attached to the intermediate support leg. The first connecting bar is connected to the first connecting bar, and one end is rotatably connected to the second supporting leg and the other end is rotatably connected to the intermediate supporting leg. And prevents the intermediate support leg, the first support leg and the second support leg from rotating while the first and second frames are substantially horizontal, and prevents the first and second frames from rotating. When the frame is folded, a second connecting bar for rotating the first supporting leg and the second supporting leg relative to each frame, the first frame and the second frame. And a first slide member rotatably connected to the other end of one of the first frame and the second frame. The first slide member is rotatably connected to the other end of the other of the first frame and the second frame. A second slide member which is slidably connected and slides relative to the first slide member by folding the first frame and the second frame; and the first frame. And a second frame in a horizontally expanded state and in a folded state, the first slide member and the second slide member are provided with a stopper capable of non-slidingly coupling.

According to a second aspect of the present invention, in the first aspect of the present invention, the first slide member has a first portion along the circumferential direction at an end thereof.
The second slide member is slidably inserted into the tubular member and has a stopper groove and one end along the circumferential direction corresponding to the first arc groove. The stopper is composed of a shaft-shaped member having an L-shaped groove formed of a straight groove extending in the axial direction and communicating with the stopper groove. The stopper is an annular member rotatably fitted to the cylindrical member, and the annular member. The first slide member and the second slide member are prevented from sliding by being inserted in the L-shaped groove from the first arc groove provided in the member and positioned in the stopper groove, and at the same time, It is characterized by comprising a locking shaft that allows the first slide member and the second slide member to slide by rotating the annular member and positioning it in the linear groove.

According to the inventions of claim 1 and claim 2,
When the first frame and the second frame are horizontally unfolded and folded, the first slide member and the second slide member provided on these frames are coupled so as not to slide. Therefore, the unfolded state and the folded state of the pair of frames can be reliably maintained.

According to the second aspect of the invention, it is possible to prevent the first slide member and the second slide member from sliding, or to easily perform the operation for allowing the slide.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The folding bed apparatus of the present invention shown in FIG. 1 has a bed frame 1. The bed frame 1 is divided into a first frame 2 and a second frame 3. Each frame 2, 3 has a rectangular frame member 2a, 3a, and each frame member 2a, 3a has a net 2
b and 3b are stretched.

First brackets 4 are vertically provided on both ends in the width direction of the lower surface of one end of the first frame 2, and the pair of first brackets 4 have an inverted U shape. Both ends of the first support leg 5 are rotatably connected. Band-shaped horizontal members 6 are provided at the lower ends of both ends of the first support leg 5 along the longitudinal direction of the bed frame 1, and stoppers are provided on the lower surfaces of both ends of the horizontal member 6, respectively. A pair of first casters 7 is provided.

Second brackets 8 are vertically provided at both ends in the width direction of the lower surface of one end of the second frame 3, respectively.
Both ends of a second support leg 9 having an inverted U shape are rotatably connected to the second bracket 8. This second
Second casters 11 are provided on the lower surfaces of both ends of the support leg 9 respectively.

The above-mentioned first frame 2 and second frame 3
One ends of links 12 and 13 are fixed to the lower surfaces of the other end portions of the frame members 2a and 3a on both sides in the width direction, respectively.
The other ends of the links 12 and 13 are superposed, and the superposed portions are rotatably connected to both ends of an intermediate support leg 14 formed of a pipe material in a substantially U-shape by a first support shaft 15. Has been done. Therefore, the first frame 2 and the second frame 3 are rotatably connected by the first support shaft 15 via the links 12 and 13.

One ends of the first connecting bar 16 and the second connecting bar 17 are rotatably connected to the middle portion of the intermediate support leg 14 in the width direction. The other end of the first connecting bar 16 is rotatably connected to the middle portion of the first supporting leg 5 in the width direction, and the other end of the second connecting bar 17 is the second supporting leg 9. Is rotatably connected to a middle portion in the width direction.

Therefore, the intermediate supporting leg 14 is rotated by the pair of connecting bars 16 and 17 in a direction in which the intermediate supporting leg 14 falls from the standing state with respect to the frames 2 and 3 as shown in FIG. 2A. Have been blocked. Further, the pair of connecting bars 16 and 17 rotate the first frame 2 and the second frame 3 about the first support shaft 15 as a fulcrum as shown in FIG. 2 (b). The first support leg 5 and the second support leg 9 are rotated relative to the frames 2 and 3 when folded.

As a result, even if the first frame 2 and the second frame 3 rotate, the casters 7 and 11 of the supporting legs 5 and 9 are surely grounded to the floor. It can be maintained. That is, when the first frame 2 and the second frame 3 are folded or unfolded from the folded state, these frames 2 and 3 are caster 7,
It can be easily moved by 11.

Further, a hook 21 is provided in the middle of the intermediate support leg 14 in the width direction. One end of the first coil spring 22 and one end of the second coil spring 23 are connected to one end and the other end of the hook 21, respectively. The other end of the first col spring 22 is connected to a first reinforcing plate 24 installed on the other end of the first frame 2, and the second coil spring 23 is connected.
The other end of the second frame 3 is connected to a second reinforcing plate 25 that is erected on the other end of the second frame 3.

The above-mentioned first frame 2 and second frame 3
When and are in a horizontal state, the first coil spring 22
And the second coil spring 23 is pulled. As a result, the first frame 2 and the second frame 3 are separated from each other by the restoring force of the coil springs 22 and 23.
It is urged in a rotation direction in which one end side rises with 5 as a fulcrum.

The urging force of the coil springs 22 and 23 is almost equal to the weight of the frames 2 and 3 and the weights of the first and second mattresses 26 and 27 placed on the frames 2 and 3, respectively. They are in balance. Therefore, as shown in FIG. 2 (a), the first frame 2 and the second frame 3 in the horizontal state are light due to the restoring force of the first and second coil springs 22 and 23. Then, as shown in FIG. 2B, it can be rotated in the standing direction.

When the frames 2 and 3 are folded at the other ends of the first frame 2 and the second frame 3, the frames 2 and 3 are folded. Mattress 26, 27
Locking members 28 and 29 are provided to prevent the falling. further. A handle member 31 is provided on one side in the width direction of the second frame 3 to lift the first frame 3 when the bed frame 1 is folded.

As shown in FIGS. 3 to 5, one end of a tubular member 35 serving as a first slide member has a second end on one widthwise side of the other end of the first frame 2. It is rotatably connected by a support shaft 36. One end face of the tubular member 35 is closed, the other end face is open, and a peripheral wall of the other end is provided with a first arc groove 37 along the circumferential direction.

One end of a shaft-shaped member 38 as a second slide member is rotatably connected to the other end of the second frame 3 in the width direction by a third support shaft 39. ing. The shaft-shaped member 38 is hollow, and the stopper groove 41a and the shaft-shaped member 38 along the circumferential direction are provided on the other end side.
L-shaped groove 41 consisting of a straight groove 41b which extends in the axial direction of and has one end communicating with one end of the stopper groove 41a.
Has been drilled.

The other end of the shaft member 38 is slidably inserted into the tubular member 35. Further, a stopper 42 is provided on the outer circumference of the tubular member 35.
The stopper 42 includes an annular member 42a rotatably fitted to the outer peripheral surface of the tubular member 35 along the circumferential direction, a locking shaft 42b screwed to the annular member 42a, and the locking shaft 42b. The knob 42c is attached to one end.
The locking shaft 42b extends from the circular arc groove 37 to the L-shaped groove 4
1, the stopper groove 41a or the straight groove 4
It can be located at 1b.

The first frame 2 of the bed frame 1
When the second frame 3 and the second frame 3 are lying horizontally, the arcuate groove 37 of the tubular member 35 and the stopper groove 41 of the shaft member 38 face each other. Therefore, at this time, the locking shaft 42b of the stopper 42 penetrates the circular arc groove 37 of the tubular member 35 and the stopper groove 41a of the shaft member 38, and the stopper 42 is rotated in that state. If the locking shaft 42b is moved to the other end side of the stopper groove 41a, that is, to the end portion side not communicating with the linear groove 41b, the shaft-shaped member 38 is relatively moved with respect to the tubular member 35 by the locking shaft 42b. It is prevented from sliding.

If the stopper 42 is rotated and the locking shaft 42b is positioned at one end of the stopper groove 41a,
This locking shaft 42b moves from the stopper groove 41a to the straight groove 41b.
It becomes possible to move relatively to. Therefore, the shaft member 38 can be slid with respect to the tubular member 35.

According to the foldable bed apparatus having the above construction, the first frame 2 and the second frame 3 of the bed frame 1 are laid down substantially horizontally when in use. In that state, as shown in FIG. 3A, the tubular member 35 provided on the second frame 3 is inserted into the tubular member 35 provided on the first frame 2 to form a tubular shape. Since the stopper groove 41a of the shaft-shaped member 38 faces the circular arc groove 37 of the member 35, the annular member 42a of the stopper 42 is rotated to lock the locking shaft 42.
b is the other end of the stopper groove 41a, that is, the L-shaped groove 4
Located at the bent end of 1.

As a result, the locking shaft 42b engages with the stopper groove 41a and prevents the shaft-shaped member 38 from sliding relative to the cylindrical member 35, so that the first frame.
The frame 2 and the second frame 3 are the first and second coil springs 2.
Even if the frames 2 and 23 are urged in the upright direction, the frames 2 and 3 are prevented from rotating in the upright direction by an unexpected external force.

When the bed frame 1 is folded, the stopper 42 is rotated so that the locking shaft 42b is engaged with the stopper groove 41.
It is positioned so that it can be moved to the other end side of a, that is, to the straight groove 41b. In this state, the second frame 3 is rotated in the upright direction and folded by the handle member 31 provided on the second frame 3.

At this time, as shown in FIG. 2B, the first
The supporting leg 5 of the first frame is connected by the first connecting member 16 to the first frame.
Since the second supporting leg 9 is rotated relative to the second frame 3 by the second connecting member 17, the bed frame 1 is rotated relative to the second frame 3. The grounded state of the first caster 7 and the second caster 11 is reliably maintained when folding the. In addition, bed frame 1
When folding, the first caster 7 is disabled to run. Thereby, when folding, the second frame
The frame 3 travels in a direction approaching the first frame 2.

When the pair of frames 2 and 3 are folded, the locking shaft 42b slides in the linear groove 41b, so that the pair of links 12 and 13 changes from the state shown in FIG. 3A to the state shown in FIG. 3B.
As shown in FIG. 3, the locking shaft 42b slides in the linear groove 41b until the linear member 41 moves from the cylindrical member 35 to the shaft-shaped member 3 until it becomes substantially straight.
8 slides in the direction in which the first and second frames 2 and 3 are folded, and the first and second links 12 and 1 are folded.
Since the shaft 3 has an inverted V shape, the shaft member 38 slides in the direction in which the shaft member 38 enters the tubular member 35.

When the pair of frames 2 and 3 are folded substantially vertically as shown in FIG. 3 (c), the tubular member 3 is formed.
The relative positional relationship between the shaft 5 and the shaft-shaped member 38 is the same as in the state of FIG. That is, the circular arc groove 37 of the tubular member 35.
And the stopper groove 41 of the shaft-shaped member 38 coincide with each other.

In this state, the stopper 42 is operated so that the locking shaft 42b is moved from the end of the linear groove 41b to the stopper groove 41a.
The cylindrical member 35 and the shaft-shaped member 38 are slidably coupled to each other by shifting to the end portion.

Therefore, by folding the bed frame 1, even if the restoring forces of the first and second coil springs 22 and 23 become zero, the locking shaft 42b of the stopper 42 causes the tubular member 35 and the axial shape of the shaft. Since relative sliding with the member 38 is blocked, even if an unexpected external force is applied to the bed frame 1, the first frame 2 and the second frame 3
And do not move in the direction of probation. That is, the folded state can be reliably maintained.

When the folded frame 1 is unfolded for use, the stopper 42 is rotated and the locking shaft 4 is rotated.
2b is moved to a position where it can slide from the stopper groove 41a to the linear groove 41b.

Then, the second frame 3 is replaced with the first frame.
As shown in FIG. 2A, the first frame 2 and the second frame 2 are moved from the state shown in FIG. 2C to the state shown in FIG. -Mum 3 is first, second
The coil springs 22 and 23 are laid down substantially horizontally against the restoring force.

When the first frame 2 and the second frame 3 fall down substantially horizontally, the arc groove 37 and the stopper groove 41a.
And face each other. Therefore, if the stopper 42 is rotated to move the locking shaft 42b from the linear groove 41b to the end of the stopper groove 41a, the tubular member 35 and the shaft member 38 are held so as not to slide, and the bed frame is fixed. The frame 1 can be held without rattling due to careless external force.

As described above, the first frame 2 and the second frame 3 of the bed frame 1 are provided with these frames 2,
The cylindrical member 35 and the shaft member 38 that slide relative to each other in accordance with the folding or unfolding of the member 3 are provided, and the relative sliding of these members 35 and 36 during the unfolding and the folding is prevented by the stopper 4
I made it possible to stop by 2.

Therefore, the folded bed frame 1
Even if an inadvertent external force is applied to the expanded bed frame 1 or the expanded bed frame 1, the external force causes the first frame 2 and the second frame 3
It is possible to prevent rattling and rattling in the standing direction or the falling direction.

Moreover, when the stopper 42 is operated, the annular member 42a is rotated and the locking shaft 42b is moved to the stopper groove 41.
Since it only has to be located at one end or the other end of a, it can be performed easily and quickly.

Although the shaft-shaped member and the tubular member are given as the first slide member and the second slide member in the above-mentioned one embodiment, the slide members are not limited thereto, and they can be slidably engaged with each other. For example, a channel member having a U-shaped cross section may be used, and any shape may be used as long as they can be slidably engaged with each other.

Further, the stopper does not have to be rotatably provided on the slide member. For example, the first slide member and the second slide member are formed with the engagement holes corresponding to each other, and the engagement holes have the shaft-like shape. You may make it insert a stopper.

[0047]

According to the first and second aspects of the present invention, the first frame and the second frame are provided in a horizontally expanded state and a folded state in these frames. The first slide member and the second slide member thus formed can be coupled so as not to slide.

Therefore, even if an inadvertent external force is applied to the pair of frames in the unfolded or folded state, the pair of frames move to impair the unfolded or folded state. Absent.

According to the invention of claim 2, the first slide member and the second slide member are a tubular member and a shaft member slidably inserted in the tubular member, and the stopper is the tubular member. A ring-shaped member rotatably fitted to the ring-shaped member, and an arcuate groove formed in the tubular member and the shaft-shaped member and a locking shaft inserted into the L-shaped groove provided in the ring-shaped member. did.

Therefore, in order to prevent the relative sliding of the cylindrical member and the shaft-shaped member by the stopper, or to release the blocked state, it is sufficient to rotate the annular member, and the operation is simple and easy. Can be done quickly.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of an embodiment of the present invention.

FIG. 2A is a side view showing a state where the bed frame is horizontally expanded, FIG. 2B is a side view showing a state where the bed frame is in the middle of folding, and FIG. 2C is a side view showing a state where the bed frame is also folded.

3A to 3C are side views of a portion of a link that also connects a pair of bed frames.

FIG. 4 is an exploded perspective view of the stopper.

FIG. 5A is a sectional view taken along the axial direction of the stopper that is also assembled, and FIG. 5B is a sectional view taken along the radial direction.

[Explanation of symbols]

2 ... the first frame 3 ... the second frame 5 ... First support leg 9 ... Second support leg 12 ... first link 13 ... second link 14 ... Intermediate support leg 16 ... First connection bar 17 ... Second connection bar 22 ... First coil spring 23 ... Second coil spring 35 ... Cylindrical member (first slide member) 38 ... Second slide member 42 ... Stopper 42a ... Annular member 42b ... Locking shaft

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-9-149842 (JP, A) JP-A-61-249412 (JP, A) JP-A-7-163426 (JP, A) JP-A-5- 33952 (JP, A) Actual Kaihei 2-61251 (JP, U) Registered utility model 3043546 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47C 17/00-25/02 A47C 29/00 A47C 27/00-27/22 A47C 31/00-31/12 A61G 7/00-7/10 A47B 91/00-97/08 A47B 1/00-41/06

Claims (2)

(57) [Claims] 1. A foldable bed apparatus capable of being folded in two from a midway portion in a longitudinal direction, wherein a first frame having a first supporting leg rotatably provided at one end, and a first frame at the one end. A second frame in which a second support leg is movably provided; and a pair of links whose one ends are connected to the other ends of the first frame and the second frame, respectively. The other ends of the pair of links are rotatably connected with the same fulcrum and are rotatably connected to support the first and second frames in a substantially horizontal state with the first and second support legs. An intermediate support leg in which the first frame and the second frame are foldable with the other end of the link as a fulcrum so that their lower surfaces are opposed to each other, and one end thereof is rotatable with respect to the first support leg. And a second connecting bar, the other end of which is rotatably connected to the intermediate support leg.
One end is rotatably connected to the second support leg and the other end is rotatably connected to the intermediate support leg, and the first connection bar connects the first and second connection legs. When the intermediate support leg, the first support leg and the second support leg are prevented from rotating while the frame is substantially horizontal, and the first and second frames are folded, the first support leg is folded. Support legs and second
For rotating the supporting legs of the frame relative to each frame
Connecting bar, a spring biasing the first frame and the second frame in the folding direction, and the other end of one of the first frame and the second frame. A first slide member that is rotatably connected to the first portion, and the first slide member that is rotatably connected to the other end of the other of the first frame and the second frame. A second slide member which is slidably connected to the member and slides relative to the first slide member by folding the first frame and the second frame; and the first frame. A stopper capable of slidably coupling the first slide member and the second slide member in a state where the frame and the second frame are horizontally expanded and folded. Foldable bed device. 2. The first slide member is a tubular member having a first arc groove along the circumferential direction formed at an end thereof, and the second slide member is slidably inserted into the tubular member. A stopper groove along the circumferential direction corresponding to the first circular arc groove and an axial member having an L-shaped groove formed of a linear groove along the axial direction with one end communicating with the stopper groove, The stopper is an annular member rotatably fitted on the tubular member, and the stopper is inserted into the L-shaped groove from the first arc groove provided in the annular member and positioned in the stopper groove. The first slide member and the second slide member are prevented from sliding, and the annular member is rotated to be positioned in the linear groove, so that the first slide member and the second slide member slide. Locking shaft that enables Folding bed according to claim 1, wherein the consist.