JP2532212Y2 - Sofa bed - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sofa bed which can also be used as a bed, and more particularly to a sofa bed which has a step lock mechanism and which can be freely changed to a sofa state, an intermediate position and a bed state.

[0002]

2. Description of the Related Art As a sofa bed which can also be used as a bed if necessary, for example, the one shown in FIG. 6 is conventionally known. This sofa bed is provided with a bendable seat frame 24 and a seat frame 2 in a mat 28.
4 has a built-in back frame 25 attached to the rear end so as to be free to tilt. When the sofa bed is reclined, the backrest 27 may be inclined stepwise backward while operating a lock mechanism (not shown), so that the backrest 27 can be tilted to a comfortable position for use.
Reference numeral 26 denotes a stand when used as a sofa.

When this sofa bed is used as a bed, the locking mechanism is released, the backrest 27 is tilted horizontally, and the seat frame 24 that is bent is extended to expand the seat 29 horizontally.

In order to return from the state of the bed to the state of the sofa, this operation is performed in reverse.

[0005]

In the conventional sofa bed described above, if there is a wall or an object behind, the backrest 27 cannot be tilted, so that it cannot be easily reclined or changed into a bed. There was a problem.

Further, if the user is sitting on the sofa, it cannot be transformed into a bed, so it is necessary to operate after standing, and there is a problem that the usability is poor. The present invention has been proposed in order to solve such problems of the conventional technology, and can be easily transformed from a sofa state to a bed state, and this operation can be performed while sitting down. The purpose is to provide a bed.

[0007]

In order to achieve this object, a sofa bed according to the present invention is provided with a back frame rotatably mounted on a rear portion of a seat frame, and a rear frame mounted on a rear portion of the back frame. The outer pipe is rotatably mounted, the wheels are mounted on the legs of the seat frame, the mats are mounted on the seat frame, the back frame, and the rear frame, and a plurality of locking stopper grooves are engraved in the longitudinal direction. The rear end is fastened to the rear side of the rear frame, the inner pipe is slidably inserted into the outer pipe, and a tension coil spring is used to allow the inner pipe to be constantly drawn into the outer pipe. Between the inner pipe and the inner pipe, a wheel is attached to the front leg of the inner pipe, and a slider that slides on the outer circumference of the outer pipe and the inner pipe is fastened to the rear side of the seat frame. pie The slider stopper is attached to the front end of the slider frame, the stopper for engaging and disengaging the stopper groove is attached to the slider, and the operating lever for operating the engagement and disengagement of the stopper with the stopper groove is attached to the seat frame via a coupling mechanism. Configuration.

[0008]

According to the above-described structure, if the stopper is engaged with the stopper groove and locked in a state where the back frame frame and the rear frame frame are bent in a mountain shape, a sofa can be obtained.
After releasing the locked state by the operation lever, move the seat frame forward, reduce the inclination of the chevron of the back frame and the rear frame, and lock the stopper in the stopper groove. You can recline.

When the seat frame is advanced to the full after the locked state is released, the seat frame, the back frame and the rear frame become horizontal, and can be used as a bed. At this time, the forward movement of the slider pulls the inner pipe out of the outer pipe against the tension coil spring, and the spring can store a restoring force when deformed into a sofa state.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of a sofa bed according to the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a plan view of the frame structure of the sofa bed without the mat. In this figure, the rear part of the rear frame 8 pivots around the left and right L-shaped mounting pieces 3 and 3 on the armrest frame 1a bridged below the rear legs of the left and right armrests 1 and 1. Mounted as possible. The rear end of the back frame 7 is rotatably attached to the left and right front end of the rear frame 8 extending in the front-rear direction. The left and right front end of the back frame 7 is the rear end of the seat frame 2. Is mounted so as to be rotatable. Wheels 4 are attached to the lower ends of the left and right legs that fall from the front end of the seat rim frame 2, and the left and right sides of a support frame 2 a laid over the rear of the seat rim frame 2 in the left-right direction. The wheel 4 is also attached to the lower end of the leg. A mat M is mounted on the seat frame 2, the back frame 7, and the rear frame 8.

A step lock mechanism L for locking the back frame frame 7 and the rear frame frame 8 at an angle inclined stepwise.
Is mounted between the support frame 2a and the armrest frame 1a. As shown in FIG. 2, the stage lock mechanism L is connected to the outer pipe 18 on the armrest frame 1a side.
And an inner pipe 19 that slides smoothly inside the outer pipe 18.
A tension coil spring 22 for pulling the inner pipe 19 into the outer pipe 18, the slider 9 on the support frame 1 a side,
A stopper 20 attached to the slider 9 and engaged with the stopper groove 23 of the outer pipe 18;
And an operation system for operating the disengagement. FIG. 3 shows an operation state of the lock mechanism L when used as a bed.

A rear end portion of the outer pipe 18 in which stopper grooves 23 having a semicircular cross section are formed at regular intervals in the longitudinal direction is fixed to a central portion of the armrest frame 1a, and an inner pipe 19 is provided in the outer pipe 1a. It has been inserted. The lower end of the leg 6 that falls on the front end of the inner pipe 19 has a wheel 5
Is attached. At the rear end in the outer pipe 18 and the front end in the inner pipe 19, the inner pipe 19 is
A tension coil spring 22 for urging to be always drawn into the inside is stretched. A slider stopper 12 is attached to a front end of the inner pipe 19.

A support plate 17 is provided on the cylindrical slider 9 which slides on the outer periphery of the outer pipe 18 so as to project right and left upward, and these support plates 17 are fixed to the center of the support frame 2a.
In addition, a slider guide 11 for guiding sliding of the slider 9 is protruded from a lower rear portion of the slider 9. A stopper 20 having a circular cross section is attached to a lower portion of a stopper shaft 21 rotatably supported by the left and right support plates 17. The stopper 20 is connected to an outer pipe through a notch hole 10 cut out at an upper portion of the slider 9. 18 facing the outer circumference. The stopper shaft 21 is connected to the operation lever 15 provided on the right front portion of the seat frame 2 by the arms 13 and 14 and the stopper shaft 21.
Are connected by a link mechanism with an arm (not shown) attached to the arm. When the operation lever 15 is pulled forward (clockwise), the link is pushed out, the stopper shaft 21 rotates clockwise, the stopper 20 comes off the stopper groove 23, and the locked state can be released.

Next, an operation procedure when the sofa bed thus configured is used as a sofa or a bed will be described.

First, when used as a sofa, the connecting portion between the back frame frame 7 and the rear frame frame 8 is lifted upward, and both frame frames 7, 8 are inclined in a mountain shape. At this time, a restoring force is applied to the seat frame 2 by the tension coil spring 22 to move the seat frame 2 rearward. Therefore, the force for lifting the back frame 7 and the rear frame 8 may be small. Seat M
Along with the rearward movement of 1, the slider 9 of the step lock mechanism L slides on the outer pipe 18, and at the position where the movement of the seat M <b> 1 stops, the stopper 20 engages with the stopper groove 23 to be locked. . In this locked state, as shown in FIG. 4, the back frame frame 7 and the rear frame frame 8 are held at an inclined position, and the mat M on the back frame frame 7 becomes the backrest portion M2 and can be used as a sofa.

Next, in order to recline from the sofa state, pull the operation lever 15 toward the front and move the stopper groove 2.
The locked state is released by removing the stopper 20 engaged with the lock 3. In this state, the slider 9 can freely move forward as well. Therefore, if the seat M1 is advanced using the leg force while sitting, the inclination of the back frame frame 7 and the rear frame frame 8 bent in a mountain shape becomes small. The seat back M2 can be inclined at an angle desired by the person sitting on the seat. After the setting is completed, when the operating lever 15 is released from the hand and returned, the stopper 20 is engaged with the stopper groove 23 on the outer pipe 18 and is locked at the comfortable intermediate position.

When used as a bed, the operating lever 15 is pulled forward to release the locked state, and then the seat M
1 to the front M seat, backrest M
2. Make 2 horizontal. At this time, the lock mechanism is not working, but the seat frame frame 2, the back frame frame 7, and the rear frame frame 8 are linear, so that the bed state shown in FIG. 5 can be maintained. During the movement of the seat M1, the slider 9 in contact with the slider stopper 12 is pushed forward, so that the inner pipe 19 is pulled out of the outer pipe 18 against the tension coil spring 22 and is deformed as a sofa. The tensile force is stored in the spring 22. The operation of transforming to the bed state can be performed even while sitting.

[0018]

As described above, according to the present invention, even if there is a wall or the like behind the backrest portion, the sofa can be freely transformed from a sofa to a bed use state, and this operation can be performed while sitting. There is an advantage.

Further, since the transformation from the bed to the sofa can be performed by using the force of the tension coil spring, the operation can be easily performed with a small force.

The step lock mechanism used in the sofa bed of the present invention has the same smooth operation as the stepless lock mechanism, has a compact structure, and has a high structural strength.

The step lock mechanism has an advantage that a design change corresponding to a change in size and weight of the sofa bed can be easily performed.

Furthermore, even if a problem occurs, it is easy to replace only the step lock mechanism, and the maintenance is high.

[Brief description of the drawings]

FIG. 1 is a plan view showing a frame structure of a sofa bed according to the present invention.

FIG. 2 is a longitudinal sectional view of a stage lock mechanism used in the sofa bed.

FIG. 3 is a longitudinal sectional view of a step lock mechanism showing an operation state when the bed is used as a bed.

FIG. 4 is a side view showing a state where the sofa is deformed.

FIG. 5 is a side view showing a state where the bed is deformed.

FIG. 6 is a side view showing a conventional sofa bed.

[Explanation of symbols]

 1 ··· Armrest 1a ··· Armrest frame 2 ··· Seat frame 2a ··· Support frame 3 ··· Mounting pieces 4,5 ··· Wheels 6 ··· Legs 7 ··· Back frame 8 ··· Rear frame 9 ··· Slider 10 ··· Notch 11 ··· Slider guide 12 ··· Slider stopper 13 and 14 ···・ Arm 15 ・ ・ ・ ・ Operation lever 17 ・ ・ ・ ・ Support plate 18 ・ ・ ・ ・ Outer pipe 19 ・ ・ ・ ・ Inner pipe 20 ・ ・ ・ ・ Stopper 21 ・ ・ ・ ・ Stopper shaft 22 ・ ・ ・ ・ Tension coil Spring 23 ··· Stopper groove L ··· Step lock mechanism M ···· Mat M1 ··· Seat M2 ··· Backrest

Claims (1)

(57) [Scope of request for utility model registration] 1. A back frame frame is rotatably mounted on a rear portion of a seat frame frame, a rear frame frame is rotatably mounted on a rear portion of the back frame frame, and wheels are mounted on legs of the seat frame frame. A mat is mounted on the frame frame, the back frame frame and the rear frame frame, and the rear end of the outer pipe having a plurality of locking stopper grooves cut in the longitudinal direction is fixed to the rear side of the rear frame frame. The inner pipe is slidably inserted into the inner pipe, and a tension coil spring that allows the inner pipe to be constantly drawn into the outer pipe is bridged between the outer pipe and the inner pipe. Attach the wheel to the part, fix the slider sliding on the outer circumference of the outer pipe and the inner pipe to the rear side of the seat frame, attach the slider stopper to the front end of the inner pipe, and disengage the slider with the stopper groove. A sofa bed, wherein an operating lever for operating the stopper to be engaged with and disengaged from the stopper groove is attached to the seat frame via a connecting mechanism.