JPH0631969Y2 - Sofa bed undulating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an undulating device for a sofa bed which can be converted into a bed form and a sofa form in which a part of the floor part is raised to be a backrest part or an armrest part.

(Prior art and its problem) As a typical sofa bed of the related art, a floor frame portion in a bed form is divided into an undulating frame serving as a sofa-shaped backrest portion and a main body frame serving as a seat portion, and both frames are pivotally supported. While being pivotally connected by a pin, it can be stably held by converting to both of the above-mentioned forms through a multistage locking lever mechanism or ratchet mechanism interposed between both frames, and further to a sofa form with different backrest angles. There is something I did.

However, in such a sofa bed, as shown in FIG. 7, since the sofa-shaped backrest portion A is bent at a steeper angle than the rear end portion of the seat portion B and rises linearly, In addition to the poor feeling of use in the sofa form, when the entire floor frame part is covered integrally with the cover C by covering the cushion material, the bent part D of the cover C shrinks to the front side in the sofa form. There is a drawback that it is very easily damaged because it is greatly stretched on the rear surface side. Further, although a means for attaching a patch cloth to the bent portion D has been conventionally used for the purpose of reducing the damage of the cover C, it takes time and cost, and the appearance is deteriorated.

In view of the above-mentioned circumstances, the present invention has a sofa-like backrest portion that gently rises curvilinearly with respect to a seat portion, and is excellent in the feeling of use in the sofa-like portion. An object of the present invention is to provide a sofa bed undulating device in which a sofa-shaped bent portion is hard to be damaged even when it is covered and a conventional patch cloth is unnecessary.

(Means for Solving the Problems) The undulating device for a sofa bed according to the present invention is, as a means for achieving the above object, a bed frame-shaped floor frame portion which is located between the main body frame, the undulating main frame, and the middle thereof. A plurality of stages which are divided into a sub-frame, a first bracket having a locking pin is fixed to one of the main body frame and the undulating main frame, and a second bracket is fixed to the other, and which engage with the locking pin. A third bracket fixed to the undulating sub-frame is pivotally connected at one end to one end of a posture conversion lever having an engaging portion of the second bracket along the longitudinal direction, and the third bracket has a second end at the second end. It is pivotally connected to the bracket and is pivotally connected to the first bracket at an intermediate position higher than the one end, and one end is pivotally connected to a lower position than the third bracket connection part of the first bracket and the other end. Is the third bracket station of the second bracket A structure including a connecting link pivotally mounted at a position higher than the connecting portion and a spring member for urging the posture changing lever toward the engagement side with the locking pin is adopted.

(Operation) When the posture changing lever is engaged with the locking pin of the first bracket at the bed-form engaging portion, the undulating main frame and the undulating sub-frame lie down to maintain the bed form together with the main body frame. .

Then, when the engagement position of the lever shifts to the sofa-shaped engagement portion, the third bracket pivots from the bed shape to the upright side about the pivotal attachment portion with the first bracket, and the undulating sub-frame Although it rises at a predetermined inclination angle, since the second bracket is connected to the first bracket by two X-shaped intersecting links consisting of the third bracket and the connecting link, the undulating main frame is undulating. Get up with an even larger inclination angle than the sub-frame.

Therefore, in the sofa form, the backrest and the like bend and stand up in two steps, that is, two joints, from the seat, and in the product in which the entire floor frame is covered with a cushion material and covered integrally with the cover, the bent portion is in a resting posture. The curve is gentle and suitable for, and the contraction on the front side and the extension on the rear side of the bent portion are widely dispersed without being locally concentrated as in a conventional joint.

The posture changing lever may be an existing one, and may have three or more stages of engaging portions in order to change the degree of inclination of the backrest or the like in the sofa form in multiple stages.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a bed-shaped floor frame portion installed on an underframe 2, and is a body frame 1a fixed to the underframe 2 and corresponding to a seat portion B in the sofa line of a virtual line shown in the figure. And an undulating main frame 1b corresponding to the upper portion of the backrest portion A and an undulating subframe 1c located between them and also corresponding to the lower portion of the backrest portion A. Therefore, in the longitudinal direction in the bed form, the main body frame 1a has the first
The brackets 3 and 3, the second brackets 4 and 4 on the undulating main frame 1b, and the third brackets 5 and 5 on the undulating sub-frame 1c.
Each pair is fixed on both sides.

As shown in FIGS. 2 to 5, these first to third brackets 3 to 5 project laterally from the vertical pieces 3a, 4a, 5a and their lower edges by punching and bending a steel plate material or the like. The mounting piece 3b, 4b, 5b is formed in an L shape in a front view, and the mounting piece 3b, 4b, 5b is provided with a bolt insertion hole 6 for fixing to each of the frames 1a to 1c of the floor frame portion 1.
(See FIG. 5). Then, on one surface side of the vertical piece 3a of the first bracket 3, a band-shaped piece 7a bent stepwise is arranged slightly obliquely and fixed at the upper part, and between the lower part of the band-shaped piece 7a and the vertical piece 3a. A locking pin 8 is installed on the above, and the strip-shaped piece 7a constitutes a holding guide 7 of the posture changing lever 9 which engages with the locking pin 8.

The posture changing lever 9 is an existing three-stage switching type, and is made of a sawtooth-shaped metal strip plate in which first to third engaging portions 9a to 9c are sequentially cut out along the lower edge. The pivot pin 1 is provided at each of the positions of the second and third engaging portions 9b and 9c.
Return guide claw 10 swingably mounted via 0a
Protrudes and engages with any of the first to third engaging portions 9a to 9c in a state of being loosely fitted and inserted into the holding guide 7. The lever 9 cannot move to the right in FIGS. 2 to 4 in each engaged state, but when pulled to the left, the lever 9 engages based on the tooth shape between the engaging portions. The position is sequentially displaced from the first engaging portion 9a to the second engaging portion 9b to the third engaging portion 9c. Also,
When the lever 9 is pulled to the left in the engaged state at the third engaging portion 9c, the locking pin 8 crosses the return guide claw 10 because the notch of the engaging portion 9c is wide. When it moves relatively to the right and then the lever 9 is pushed to the right,
The second and third engaging portions 9b, 9c are pressed by the locking pin 8 to the swing limit in the clockwise direction in the drawing, and the return guide claw 1 is provided.
Since it is closed by 0 to form a gentle mountain shape, the locking pin 8 moves over the second and third engaging portions 9b and 9c without engaging them and relatively moves to the first engaging portion 9a. To meet. Reference numeral 10b is a cover plate that covers both guide claws 10, 10, and the swinging limit of the guide claw 10 in the clockwise direction in the figure is set by the contact between the upper edge of the guide claw 10 and the upper shoulder of the guide claw 10. .

Then, the posture changing lever 9 is provided on the one end side, that is, the second side.
It is pivotally connected to one end portion of the third bracket 5 via a pivot pin 11a on the left end side in FIGS. 4 to 4, and is engaged between the tip side of the pivot portion and the upper portion of the third bracket 5. The pulling force of the attached coil spring 12 biases the coil spring 12 in a direction in which the engagement with the locking pin 8 is strengthened.

Further, the third bracket 5 has a pivot pin 1 at the other end.
While being pivotally connected to the second bracket 4 via 1b,
It is pivotally connected to the first bracket 3 via a pivot pin 11c at an intermediate portion located at a position higher than the connecting portion with the posture changing lever 9.

Further, one end of the connecting link 13 is connected to the position higher than the pivot pin 11a of the first bracket 3 via the pivot pin 11d, and the other end of the connecting link 13 is more than the pivot pin 11c of the second bracket 4. It is connected to the low position via a pivot pin 11e. Therefore, the first bracket 3 and the second bracket 4 are connected by two links formed by the connection link 13 and the third bracket 5 that intersect in an X shape.

The connecting structure including the first to third brackets 3 to 5, the connecting link 13, and the posture changing lever 9 is provided in the same shape on both left and right sides of the sofa bed.

In the sofa bed having the above structure, when in the bed form, the undulating main frame 1b and the undulating subframe 1c are both arranged horizontally as shown in FIG. 2, and the posture changing lever 9 is locked at the first engaging portion 9a. It is engaged with the pin 8. However, when the backrest portion A (see FIG. 1) is raised from this bed form, the undulating main frame 1b and the undulating subframe 1c are separated as shown in FIG. 3 due to the positional relationship of the four pivot pins 11b to 11e. The former is activated in such a manner that the degree of inclination is larger than that of the latter, and at the same time, the posture changing lever 9 is pulled to the left in the drawing, and the locking pin 8 is disengaged from the first engaging portion 9a and the second engaging portion 9b. To form a first sofa with a large chair and a large backrest. Next, when the backrest portion A is further raised, similarly, the undulating main frame 1b and the undulating subframe 1c are activated in such a manner that the inclination degree of the former is increased, and the posture changing rehearse 9 is further pulled as shown in FIG. The engaging pin 8 is engaged with the third engaging portion 9c, so that a second sofa configuration having a long chair type and a small back tilting is formed.

Thus, in both the first and second sofa configurations described above, the backrest portion A is held by the engagement of the posture changing lever 9 and the locking pin 8 so that it cannot be tilted backward, but the backrest portion 2 has two steps from the rear end of the seat portion B. In other words, since it bends at two joints and rises and the lower part is more sloping than the upper part, when the entire floor frame part 1 is integrally covered with a cover C containing a cushion material, the seat part B to the backrest part A The curved part is curved gently.

On the other hand, in order to switch from the sofa form to the bed form, the backrest portion A may be further raised as compared with the second sofa form, and then the backrest portion A may be pushed down. That is, by the above-mentioned raising operation, the return guide claws 10, 10 interfere with each other and engage with the first engaging portion 9a to return to the bed shape shown by the solid line in FIG. 2 and FIG.

In the present invention, contrary to the above embodiment, a structure in which the first bracket 3 is fixed to the undulating main frame 1b and the second bracket 4 is fixed to the main body frame 1a can be adopted. Alternatively, another spring member such as an octopus spring may be used, and the angle of the backrest portion in the sofa form can be adjusted to one step or three steps or more by setting the number of steps of the engaging portion of the posture changing lever 9. May be.

Further, the undulating device of the present invention is not limited to the sofa-shaped backrest, and, for example, as shown in FIG. 6, the both ends in the longitudinal direction in the bed-shaped solid line shown in FIG. The armrests E, E of the sofa bed using a separate backrest A as E can be applied to the undulating operation part in various types of sofa beds. Furthermore, the body frame of the floor frame is not limited to the fixed type,
For the purpose of improving the appearance and sitting comfort of the sofa bed, for example, the structure may be such that it can be displaced or slightly tilted with respect to the underframe.

(Effects peculiar to the invention) According to the hoisting device of the present invention, since the portion of the sofa-shaped backrest or the like which is undulated along with the conversion of the bed-like shape undulates due to the bending of two joints, the above-mentioned backrest in the sofa-like shape. The parts and the like rise gently in a curved line with respect to the seat part, and are excellent in the feeling of use in the sofa form, and when the entire floor frame part is entirely covered with a cover, the bent part in the sofa form is less likely to be damaged. It is possible to provide a sofa bed which does not require such a cloth and has a good appearance, and in which the above-mentioned undulating motion can be easily performed by one-touch operation by causing or pushing down the backrest or the like. Furthermore, the undulating device of the present invention has the advantages that it is structurally extremely simple, has excellent operational reliability, and is inexpensive to manufacture.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a frame structure of a sofa bed to which an undulating device according to an embodiment of the present invention is applied, FIG. 2 is a side view of the undulating device in the bed form of the sofa bed, and FIG. Similarly, a side view of the same device in the first sofa form, FIG. 4 is a side view of the same device in the second sofa form, FIG. 5 is a plan view of the same device, and FIG. 6 is another sofa to which the present invention is applied. FIG. 7 is a front view showing a bed, and FIG. 7 is a side view of a conventional sofa bed. 1 ... Floor frame part, 1a ... Main body frame, 1b ... Undulating main frame, 1
c ... undulating subframe, 3 ... first bracket, 4 ... second bracket, 5 ... third bracket, 8 ... locking pin, 9
...... Posture conversion lever, 9a to 9c ...... Engagement part, 11a to
11e ... Locking pin, 12 ... Coil spring (spring member), 13 ... Connection link.

Claims (1)

[Scope of utility model registration request] 1. A bed-shaped floor frame portion is divided into a main body frame, an undulating main frame, and an undulating sub-frame located between them, and a locking pin is provided on one of the main body frame and the undulating main frame. The first bracket is fixed and the second bracket is fixed to the other, and the undulating sub-frame is attached to one end side of the posture changing lever having a plurality of stages of engaging portions engaging with the locking pin along the longitudinal direction. The fixed third bracket is pivotally connected at one end, the third bracket is pivotally connected at the other end to the second bracket, and the third bracket is pivotally connected to the first bracket at an intermediate position higher than the one end. A connecting link which is connected to the first bracket at a lower position than the third bracket connecting part of the first bracket and the other end is at a higher position than the third bracket connecting part of the second bracket. Energize the posture conversion lever toward the engagement side with the locking pin Hoisting device sofa bed formed by and a spring member.