JP2000060683A - Sofa bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably hold a body in each form of a bed or a sofa by crossing two members having two nodes and set the interval of the nodes equal, setting a pair of each two ends of the four ends symmetrical to the two members, and forming a four-rod link constitution connected by pins with the node intervals set to equal. SOLUTION: Four-rod links 12, 23 supported by legs of each part in the developed state have their connecting members attached into an inverse V shape so as to bear the vertical load and exhibit the function as a bed and a same kind of furniture. When the front end of the front part 1 is raised, it is turned around the four-rod link 12 so as to be utterly turned over and stacked on the middle part 2 without any clearance. The four-rod link is characterized in that when e front part 1 is turned around, the connecting material is separated therefrom and the end of the front part 1 having the connecting material attached thereto is raised high so that every parts are closely stacked thereon without getting stuck nor collided. Lastly, it turns to be in a state of the front part 100 and four-link 120.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention can be folded from a bed or couch into a sofa or a chair,
Further, it relates to a sofa bed having a rigid frame among the sofa beds capable of the reverse conversion.

[0002]

2. Description of the Related Art Among so-called sofa beds up to now, a sofa bed having a rigid frame is divided into two pieces by dividing the bed in the direction of the short side (hereinafter referred to as width). It is divided into parts and one of them is raised to make a backrest, and the long side direction (hereinafter referred to as the length) becomes an extremely long sofa as it is, or the length is divided into three parts, both ends With respect to the stationary central part, one part was raised to serve as a backrest, and the other part was connected with a skin material or a cushioning material and turned upside down to be horizontal and used as a seat surface.

[0003]

In the conventional so-called sofa bed, the length of the so-called sofa bed is raised or reduced as a backrest, but the height is increased. It was extremely inconvenient to store and carry when not using it at all. In addition, since a skin material and a cushioning material are used as a turning mechanism when folded to form a seat surface, the folding operation and the functions before and after folding are not stable and uncertain. The present invention, in such a case,
The parts are stacked to form a smaller, more compact figure, and the above-mentioned drawbacks are eliminated.In addition, the bed and sofa are held securely and stably in each form, and even during the conversion process, they can be smoothly operated with a simple operation. The goal is to create a working sofa bed.

[0004]

[Means for Solving the Problems] As a method of connecting a plurality of parts constituting a bed, not a rotatable pin connection but two members having connection points at both ends and having an equal distance between the connection points. Cross each other, and each of the 4 ends, 2 ends, 1
A four-link mechanism (hereinafter simply referred to as a four-link) having a pair of two members symmetrically and pin-coupled with the same distance between the coupling points is used as at least a part thereof. Used. If the crossing members of the four links are referred to as crossing members and the members having both ends thereof pin-joined are referred to as binding members, two binding members of at least one of the four links respectively form a bed. It is attached to two adjacent parts. At this time, the angle formed by each of the straight lines passing through the two bonding points on the same bonding material should not be practically 180 ° in the most opened state.

In this way, if the other end of one part of the bed whose one ends are connected by the four links is lifted and swung to be fixed releasably, it becomes a backrest.
If it turns further, it can be completely turned inside out to form a seating surface. Since the above-mentioned four links have the lengths of the two kinds of members appropriately determined, the four links can be mounted below the surface of the bed, but the four links can swing the single-axis pin connection. Unlike movement, the combination of two cross members and the function of four connecting points at both ends,
When the two parts are put together and the connecting materials are separated from each other with the turning, even if the two parts are turned, they do not get stuck or collide with each other, and they make a turning motion as if centering around the surface thereof. Generally, four links are symmetrically provided on the left side as well, but if the angles of the connecting materials are determined, the shape of the four links and the position of each part are uniquely determined. As long as the torsional rigidity is secured, the left and right movements are the same, and there is no need to specifically interlock the cross members, so that the turning is extremely smooth and stable. In both the bed and the sofa, the body is held securely and stably.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows, by solid lines, a state in which the bed or couch is unfolded, a state in which the sofa is folded by a chain line, and a state in which the sofa is folded and stored. Since this embodiment is bilaterally symmetric, the right half will be mainly described. Although it is composed of three parts, a front part 1, a middle part 2 and a rear part 3, it may be two parts in a couch or the like. The front part 1 and the middle part 2 are connected by four links 12, and the middle part 2 and the rear part 3 are connected by four links 23, respectively. Each of the front portion 1, the middle portion 2, and the rear portion 3 is made of a rigid frame such as wood and a cushioning material and a skin material. In particular, the front portion 1 also has a cushioning material and a skin material on the back surface. Front part 1
And the rear part 3 has one pair each and the middle part 2 has two pairs of short legs.

FIG. 2 shows a specific shape of the four links 23 in a state where the rear portion 3 is raised to the backrest angle. The four links 12 are also the same except that the members have different lengths and there is no fixing mechanism at a predetermined angle. The link 235 and the link 237, which are the connecting materials of the four links 23, are the crossing materials, and the link 23.
6, both ends of the link 238 are pin-joined to form the frame 3 respectively.
1, attached to the frame 21. The joints at both ends of the link 238, together with the corresponding joints of the links 235 and 237, become shafts and pipes elongated to some extent to withstand the lateral force applied to the rear portion 3. . This is exactly the same for the four links 12 in that, in the expanded state in which the angle formed by the straight lines passing through the respective connection points of the link 235 and the link 237 is maximized, as shown in FIG. . A button 239 is incorporated in the link 238 and directly connected to a pin which is always pushed by a spring toward a hole array 240 formed in a part of the link 237, and the pin is pulled out by a sliding operation. Then, the rear part 3 can be fixed and released at a predetermined angle. Various other fixing / releasing mechanisms are already known.

In the embodiment constructed as described above, it is supported by the legs of each part in the expanded state, and the four links 12, 4 are provided.
Since both of the links 23 have their connecting members attached in an inverted V shape, they can withstand a vertical load and realize a function as a bed or similar furniture. Front part 1
When the front end of is lifted up, it swivels around the four links 12 and is completely turned upside down, so that it overlaps the middle portion 2 without any gap. As described above, as a characteristic of the four links, as the front part 1 is swung, the bonding material is separated, so that the end part of the front part 1 to which the bonding material is attached rises higher, and which part is attached They do not collide with each other and stack without any gap. And finally, the front parts 100 and 4 drawn by chain lines in FIG.
This is the state of the link 120. In FIG. 1, if the rear end of the rear portion 3 is pulled up to the position of the rear portion 300, the four links 231 are formed, and if fixed by the fixing mechanism, the backrest is formed. Rear part 300 and middle part 2 if designed properly
Alternatively, it can be brought into close contact with the front part 100 without a gap.
That is, it becomes a sofa together with the front part 100. The button 239 of the fixing mechanism is slid against the built-in spring to pull out the pin directly connected from the row of holes 240, and further tilted to rear part 3
After the state of 01, the state of the rear part 302 and the four links 233 is established. At this time, the front part 1 and the rear part 3 were initially horizontal.
As mentioned above, due to the characteristics of the four links,
It is stacked on the middle part 2 in order without any gaps, and has the smallest volume. In order to develop the bed from the minimum volume or the state of the sofa, the reverse operation of the above operation may be performed in the reverse order.

[0009]

The present invention has the following effects. Four
With this link, you can easily fold a bed or furniture of similar function to a sofa or chair with a simple operation, and vice versa, ensuring a stable body in both bed and sofa configurations. A sofa bed with a minimum volume can be realized by holding and holding the backrest, and the parts are stacked in order.

[Brief description of drawings]

FIG. 1 is a right side view of an unfolded sofa bed. The chain line indicates the folded state.

[Figure 2] 4 when the sofa bed is folded into a sofa
The partial expanded perspective view near this link 231.

[Explanation of symbols]

1,100 front 12,120 4 links 2 Chubu 21 frames 23, 231, 233 4 links 235, 236, 237, 238 links 3, 300, 301, 302 Rear 31 frames

Claims (3)

[Claims] 1. A bed surface is composed of a plurality of divided parts, and at least two of these parts each having a rigid frame are provided, and two 4 ends of two rigid members intersecting each other are provided at 2 ends. A bed or a furniture having a similar function, which is connected to another rigid member by a four-link mechanism pinned to each other (hereinafter, simply referred to as four links) so as to be able to swivel with each other. 2. The bed according to claim 1, further comprising a mechanism for releasably fixing the relative angles of the plurality of portions to a predetermined angle, or furniture having a similar function. 3. Of the four links, the maximum angle is set so that the angle formed by the two straight lines forming the pin connection points at each end of a pair of links that do not intersect is 180 ° in practice. The bed according to claim 1 or 2, which is attached in an inverted V-shape, or furniture having a similar function even when it becomes.