JPH0438759Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a sofa/bed device that can mutually convert between a sofa and a bed.

[Technical background of the invention and its problems]

In general, a sofa bed device has a cushion material on the upper surface side, and this cushion material is connected to a seat frame covered with an exterior material by a hinge mechanism so that the back frame can be held at a predetermined rotation angle. It becomes.

By the way, in a bed device that doubles as a sofa with this structure, the back frame can be folded horizontally to convert it into a bed, so that when the user reads or eats on the bed, for example, it is desirable to have a comfortable posture with the upper body upright. There are cases. In order to comfortably raise the upper body, a portion of the floorboard supporting the pinerest can be raised and lowered by a link mechanism. A so-called raised bed is known. However, in the conventional sofa-bed devices, no one has been developed that can be used as a back-up bed when converted into a bed.

[Purpose of invention]

The object of this invention is to provide a sofa bed device that can be used as a so-called back-up bed when converted into a bed.

[Summary of the idea]

This invention consists of a seat frame, a back frame connected to one end of the seat frame so that it can be held at a predetermined rotation angle, and a predetermined rotation angle on both sides of the seat frame and the back frame in the width direction. The device includes side frames that are connected to each other so that they can be held at an angle, a cushion material that is provided over the entire upper surface side of each of the frames, and an exterior fabric that covers the cushion material.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. The sofa/bed device shown in FIG. 2 includes a base body 1. On the upper surface of this base 1, a first
A mounting frame 2 is mounted and fixed with screws 3. A seat frame 4 formed into a rectangular frame shape using a rectangular cylindrical pipe is fixedly attached to the upper surface of the first mounting frame 2 . Further, a second mounting frame 5 is connected to one longitudinal side of the first mounting frame 2 by a pair of first hinge mechanisms 6 . A back frame 7 formed into a rectangular frame shape using a rectangular pipe is fixedly attached to the upper surface of the second mounting frame 5. The seat frame 4 and the back frame 7 are formed to have approximately the same size, and a side frame 8 is connected to each end of each frame in the longitudinal direction by a pair of second hinge mechanisms 9. has been done. The side frame 8 is connected to the seat frame 4 by a rectangular cylindrical pipe.
It is formed into a rectangular frame shape that is smaller than the back frame 7. Further, opposing sides of each pair of side frames 8 provided at both ends of the seat frame 4 and the back frame 7 are formed into oblique sides 11 that are inclined in a direction that separates from each other toward the free end side. has been done.

A large number of band-shaped belts 12 made of flexible material such as cloth or rubber are stretched in a lattice pattern on the upper surface of each of the frames 4, 7, and 8. On these belts 12 are each frame 4,
A cushion material 13 made of urethane foam or the like is attached to cover the entire surface of the parts 7 and 8. This cushion material 13 has an outer material 14 and a lining material 15.
It is covered and held by an exterior material 16 consisting of.

As shown in FIG. 3, the first and second hinge mechanisms 6, 9 have a first arm 18 and a second arm 19, one end of which is pivotally connected by a support shaft 17.
Teeth 21 are formed at one end of the first arm 18;
A stopper 22 that meshes with the teeth 21 is pivotally attached to one end of the second arm 19 by a pin 23, and is biased by a spring 24 in a direction that meshes with the teeth 21. A cam plate 25 is rotatably attached to the support shaft 17. The outer peripheral surface of the cam plate 25 has a concave portion 26 and a convex portion 27 at a predetermined angle in the circumferential direction.
is formed. The support shaft 1 of the convex portion 27
The radial dimension from 7 is larger than the radial dimension of the tooth 21. Further, at one end of the first arm 18, the stopper 22 is attached to the tooth 21.
An engaging body 28 is provided that faces the recess 26 in the engaged state. According to this structure, the first arm 18 can be held at a predetermined rotation angle with respect to the second arm 19 by the engagement between the teeth 21 and the stopper 22. Moreover, if the first arm is rotated in the direction shown by the arrow in FIG. The stopper 2 is attached to the convex portion 27 of 25.
2 rides on and disengages from the tooth 21, the first arm 18 can be freely rotated in the direction opposite to the arrow. Rotation in this direction occurs when the engaging body 28 comes into contact with the other end of the recess 26 and the cam plate 25
until the stopper 22 disengages from the convex portion 27 of the cam plate 25 and engages with the tooth 21, that is, until the first arm 18 becomes approximately horizontal with respect to the second arm 19. can be moved. Therefore, the back frame 7 can be held at a predetermined rotation angle with respect to the seat frame 4, and each side frame 8 can be held at a predetermined rotation angle with respect to the seat frame 4.
It can be held at a predetermined rotation angle with respect to the back frame 7.

According to the sofa/bed device having such a structure, the device can be used as a sofa by raising the back frame 7 at a predetermined angle with respect to the seat frame 4 as shown in FIG. Furthermore, when using the sofa as a sofa, if each side frame 8 is raised on the upper side of the seat frame 4 and the front side of the back frame 7 as shown in the same figure, the user can approach these side frames 8. You can rest on it and take a comfortable position. At this time, since the opposite sides of each pair of side frames 8 located at both longitudinal ends of the seat frame 4 and the back frame 7 are formed as oblique sides 11, these oblique sides 11 are aligned. Each pair of side frames 8 can be rotated satisfactorily.

Furthermore, if the back frame 7 is laid down horizontally with respect to the seat frame 4 as shown in FIG. 5, the plane formed by these frames 4 and 7 can be used as a bed surface. When using the bed as a bed, if the pair of side frames 8 located at one longitudinal end of the seat frame 4 and the back frame 7 are raised to a predetermined angle as shown by the chain lines in the figure, the user can By leaning on these pair of side frames 8, the user can easily take a posture with the upper body raised. In other words, it can be used as a bed with a raised back. Furthermore, if the pair of side frames 8 located at the other end of the seat frame 4 and the back frame 7 in the longitudinal direction are rotated and raised, the user's feet can be raised by these side frames 8. Because it supports you, it is effective in recovering from fatigue.

Further, since side frames 8 are provided at both widthwise ends of the seat frame 4 and the back frame 7, when used as a bed, each side frame 8 allows a large or elongated bed surface to be formed. It becomes possible to form. If a long bed surface can be formed by the side frames 8, it is possible to increase the freedom in setting the length dimensions of the seat frame 4 and the back-raising bed 7. Note that, if the side frames 8 are not used for a user to lean on when converted into a sofa, it is not necessary to form the oblique sides 11 on each side frame 8. That is, the side frame 8 may have a square frame shape.

[Effect of idea]

As described above, this invention connects the back frame to one end of the seat frame so that it can be held at a predetermined rotation angle, and also connects the back frame to one end of the seat frame so that it can be held at a predetermined rotation angle. Connected frames. Therefore, according to such a structure, when the back frame is folded down so as to be almost horizontal with the seat frame and used as a bed, the user cannot rotate and raise the side frames and lean against them. For example, you can easily take a posture with your upper body upright, which is very convenient when reading or eating on the bed. In addition, since the side frames are rotatably provided at both ends of the seat frame and the back frame in the width direction, the length of the bed surface when used as a bed can be made sufficiently long by these side frames. I can do it. In other words,
Since a bed surface of sufficient length can be obtained without any major restrictions on the length dimensions of the seat frame and the back frame, the degree of freedom in designing each part can be increased. Further, a band-shaped belt extending over the entire frame is stretched over each frame, and a sheet-shaped cushion material having approximately the same size as the entire frame is provided on this belt. Therefore, when used as a bed, a good bed surface can be obtained without grooves being formed at the locations corresponding to the joining portions of each frame.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a partially sectional plan view when the back frame is laid down horizontally, Fig. 2 is a vertical sectional view, and Fig. 3 is a partially sectional view of the hinge mechanism. FIG. 4 is a perspective view of the sofa, and FIG. 5 is a perspective view of the bed. 4... Seat frame, 6, 9... Hinge mechanism,
7... Back frame, 8... Side frame, 13
...Cushion material, 16...Exterior material.

Claims (1)

[Scope of utility model registration request] A seat frame, a back frame connected to one end of the seat frame so that it can be held at a predetermined rotation angle, and a back frame that can be held at a predetermined rotation angle at both widthwise ends of the seat frame and the back frame, respectively. a side frame connected to the seat frame, a belt-like belt stretched across the seat frame, the back frame, and the side frame; and the overall size of each frame provided on the belt-like belt. A sheet of cushion material of approximately the same size,
A bed device that can be used as a sofa and is characterized by comprising an exterior fabric coated with this cushion material.