JPH11113681A - Joint device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint device with a simple structure which enables fixing of a rotor at three positions with respect to a base plate. SOLUTION: A base plate 1 is provided with a dummy hole 3(3a) at a position corresponding to the apex of an isosceles triangle 2 and a rotary plate 11 is provided with a triangular guide hole 13. With the guide hole 13 matching the dummy hole 3a at the topmost part of the base plate 1, the rotary plate 11 is put on the base plate 1 to be sandwiched by keep plates 21 so that the rotary plate 11 is assembled rotatably on a pin 4a passing through the dummy hole 3a. When an attitude is taken to let the shaft center 12 of the rotary plate 11 pass through the dummy hole 3a at the topmost part of the base plate 1, the pin 4a is fitted into a round groove 14 at the topmost part of the guide hole 13 and turned vertical to the longitudinal direction of the base plate 1 to be retained on the base plate 1. The round groove 14 of the rotary plate 11 is gotten off the pin 4a from this state to be turned clockwise or counterclockwise. In this manner, the round groove 14 is turned by 90 in either way to be horizontal and contacts a pin 4b to stop.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting two members so as to be able to mutually bend.

[0002]

2. Description of the Related Art Furniture requires a space-saving operation when it is stored, or a folding operation is required when using the furniture. For example, the angle of a backrest with respect to a seat can be adjusted. Some of such structures, such as seat chairs, have a mechanism that allows folding between members. Various types of folding mechanisms have become widespread, and for example, there is a joint fitting disclosed in Utility Model Registration No. 1906671.

As shown in FIG. 4, this device has a substrate 31, a rotating plate 41, and a holding plate 61, both of which are formed of a steel plate. The rotating plate 41 is rotatably connected by the inserted rotating shaft 34. 31a and 41a are the substrates 31 respectively.
And a mounting portion for the rotating plate 41.

At one end in the longitudinal direction of the rotating plate 41, a ratchet tooth 42 is provided in the width direction, and a claw 43 meshing with the ratchet tooth 42 is attached to the substrate 31 before the rotating shaft 34. It is swingably attached via a pin 32. Reference numeral 62 denotes a holding plate for the oil supplied to the fitting.

[0005] At both corners of the edge of the rotating plate 41,
The first projection 42a which pushes down the tip of the claw 43 and the claw 43
Is provided.

Reference numeral 33 denotes a spring rod 33 having both ends arranged in parallel through a U-shaped bent portion. One end of the spring rod 33 is provided on the base plate 31 and the other end thereof is provided on a concave portion 43 a at the peripheral edge of the claw 43. When the first projection 42a pushes down the claw 43, the first spring rod 3 is moved upward.
The other end of 3 is stopped to prevent the return rotation of the claw 43,
Further, a stopper device 35 for stopping the other end of the spring rod 33 so as to keep the engagement between the second protrusion 42b and the claw 43 is provided.

The stopper device 35 has a triangular window 35a formed in the substrate 31, and the spring rod 33 is formed in the triangular window 35a.
Through the parallel portion at both ends of the triangular window 35
a at the opposite corner of the pin 32, and
The other of the parallel portions of the spring rod 33 is fitted and locked in 3a, and the other parallel portion of the spring rod 33 is moved between two upper and lower corners on the pin 32 side of the triangular window 35a to move the upper corner. Is configured to stop when the parallel portion abuts. Reference numeral 33a denotes a bent portion of the spring rod 33 for retaining.

In the joint having such a configuration, the rotating plate 41
Is rotated in the direction in which it rises, the other end of the spring rod 33 is pushed back in the direction of one end while the pawl 43 is pressed down by the ratchet teeth 42 and the pawl 43 is rotated. When the ratchet tooth 42 is overcome, the spring rod 3
The state in which the pawl 43 is returned and rotated by 3 to engage the next tooth portion with the pawl 43 is repeated.

Then, as shown in FIG. 5, when the first projection 42a reaches the nail 43 and pushes the nail 43 down, the nail 4
3, the other end of the spring rod 33 is stopped by the stopper device 35, and the return rotation of the claw 43 is stopped to release the engagement of the claw 43 with the ratchet teeth 42 as shown in FIG. Therefore, the turning plate 41 can turn in the falling direction.

Immediately before the rotation of the rotating plate 41 in the falling direction is completed, the second projection 42b abuts on the claw 43 and forcibly returns and rotates it as shown in FIG. The other end of the rod 33 is also lowered so as to be disengaged from the stopper device 35, and the pawl 43 is provided with a rotational property in a direction in which the pawl 43 meshes with the ratchet teeth 42.

[0011]

The present invention proposes a joint for providing a sofa bed having a new function as described below. Therefore, first, the sofa bed 50 will be described with reference to FIG.

When the sofa bed 50 is normally used as a sofa, the armrest 51 has a posture as shown in FIG. 8 (a).
As shown in FIG. 8B, one of the armrests 51 is positioned inside (the seat 52).
Side) to make a pillow, and the other to the outside to make it flush with the seat 52, and use that part as a mounting surface for the foot. In the figure, reference numeral 54 denotes a leg of the sofa bed 50.

At the time of shipping or moving, both the armrests 51 are folded outward as shown in FIG. 8 (c) so as to be easily folded and transported, and the backrest 53 is a known folding type. It can be stably stacked low and low by removing the seat 52, both armrests 51, 51 and the backrest 53 so that they are flush with each other by the mechanism, and the legs 54 are removed.

For this purpose, as a joint tool provided on the armrest 51, the rotating body can be moved to three positions, a position corresponding to the armrest 51, a position corresponding to the pillow, and a position corresponding to the footrest, What has the function of fixing the posture at each position is required.

Such a function can be performed by the joint fitting as in the above-mentioned conventional example or an improved type thereof. However, such a function that the turning plate has a fine angle adjustment during turning is possible. No mechanism is required, and a simple configuration with a small number of parts is desired.

An object of the present invention is to provide a joint that can be applied to the armrest of a sofa bed as described above, and does not use a complicated mechanism that allows the rotating body to finely adjust the angle during rotation. It is another object of the present invention to provide a device that can be fixed at three positions with respect to the above and that can realize such a function with a simple configuration.

[0017]

In order to achieve the above-mentioned object, the present invention provides an articulated tool in which a substrate and a rotating body are overlapped, and the rotating body rotates around a rotating shaft provided in the overlapping portion. Stop means such that the axis defined by the rotating body is turned clockwise and counterclockwise by a predetermined angle from a reference direction defined on the substrate and stops. Is provided on the substrate, and the locking means for locking the substrate in the reference direction is provided over the substrate and the rotating body.

In the joint device having such a configuration, the rotating body is
The axis is locked in a state facing the reference direction set on the substrate, and stops in each of the directions rotated by a predetermined angle clockwise and counterclockwise from that direction.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. This section addresses embodiments of the articulation that attaches to a sofa bed as described above. At that time, the relative angle between the base plate of the joint and the rotating body at the three positions can be variously set depending on the shape and arrangement relationship of the joint and the exterior member.
An example in which the substrate is locked in a reference direction set on the substrate and stopped at positions rotated by 90 ° clockwise and counterclockwise from the reference direction.

The joint device 10 shown in FIG. 1 has a base plate 1 formed of a longitudinal steel plate, a turning plate 11 rotatably attached to the base plate 1, and a holding plate 21.

The substrate 1 has a base 2 at its longitudinal side edge.
At the positions corresponding to the vertices 2a (top) and the vertices 2b (both ends of the base 2c) of the isosceles triangle 2 in which c is set in parallel, the fool holes 3a, 3b, 3b (hereinafter, representatives) having the same size are respectively provided. In this case, an idiot hole 3) is provided. Further, at a part of the same side edge of the board 1, a plate body projects perpendicularly to the plate surface, and the plate body serves as a mounting portion 5 to a framework of a sofa bed, and a mounting hole 5a is provided.
Is provided.

As shown in FIG. 1B, the rotary plate 11 is provided with a guide hole 13 at an end on the side attached to the substrate 1. The guide hole 13 has a “diaper shape” with the axis 12 of the rotating plate 11 defined as a line running parallel to the longitudinal direction passing through the center of the rotating plate 11 in the width direction and having a symmetric axis. In this conical shape, a hole 13a having the same size as the fool hole 3 of the substrate 1 is provided at the position of each vertex of a base triangle having a predetermined size.
Adjacent ones of 3a are formed by being connected by a curve 13b which is in contact with each circumference, and have a diaper shape as a whole. This diaper-shaped guide hole 13
Each vertex is a round groove 14 based on the hole 13a.

This joint tool 10 having the above members
The turning plate 11 is superimposed on the substrate 1 so that the guide hole 13 is aligned with the fool hole 3a at the position of the uppermost vertex 2a of the isosceles triangle 2 set on the substrate 1. A pressing plate 21 made of a rectangular steel plate having the same size as the fool hole 3 and having a fool hole 23 of the same arrangement is stacked on the rotating plate 11 side, and riveting is performed on the fool hole at a corresponding position between the substrate 1 and the pressing plate 21. Pin 4 is inserted and its end is swaged, and three plates 1, 11, 2 are inserted between the swaged portion and the head.
It was assembled by restraining No. 1. As a result, the rotating plate 11 of the joint 10 is
Is rotatable around a pin 4a passing through a fool hole 3a at a vertex 2a.

In such a joint 10, as shown in FIG. 2, the rotation plate 11 has an axis 12 perpendicular to the base 2c of the isosceles triangle 2 of the substrate 1 (see FIG. 1). Further, when the posture that passes through the uppermost vertex 2a (see FIG. 1) is taken, the pin 4a passing through the fool hole 3a of the substrate 1 fits into the round groove 14 at the uppermost position of the guide hole 13, and 1
Are locked to the substrate 1 in a direction perpendicular to the longitudinal direction of the substrate.

Then, the rotating plate 11 is displaced upward from the vertically oriented state to remove the round groove 14 at the uppermost position of the guide hole 13 from the pin 4a passing through the fool hole 3a of the substrate 1,
If the rotating plate 11 is rotated clockwise or counterclockwise, in each case, the fool holes 3b at both ends 2b (see FIG. 1) of the base 2c of the isosceles triangle 2 of the substrate 1 are both present. Stops by contacting the pin 4b passing through
It is oriented 90 degrees from the vertical position, that is, in the horizontal direction.

In order to perform such an operation, an isosceles triangle defining the positions of the above-mentioned substrate 1 and the holes 3 and 23 of the holding plate 21 and a round groove 14 of the rotating plate 11 are formed. The shape specification of the isosceles triangle defining the position of the hole 13a is determined so as to take the above-described posture of the locking and stopping of the rotating plate 11 with respect to the substrate 1.

As shown in FIG. 3, the joint device 10 having the above-described structure is attached to the front and rear at both ends of the frame 52a of the seat of the sofa bed 50 by the attachment portion 5 of the base plate 1, and An armrest frame 51a is attached to the joints 10, 10. And the frame 51a
Is provided with an armrest 51b.

Sofa bed 50 with all exteriors
As described above, when one of the armrests 51 is tilted to the seat side 52 to form a pillow, and the other is tilted outward to form a footrest portion, the armrest 51 can be used for a bed for napping and resting (see FIG. 8 described above). ).

At the time of transportation, the legs 54 are removed, and both armrests 5
When the first member 1 is turned outward and turned in the horizontal direction, the seat 52 and the armrest 51 are flush with each other and can be compactly stacked (see FIG. 8).

As described above, according to the joint device 10 of this embodiment, the pivoting member is not a complicated mechanism capable of finely adjusting the angle during the rotation, but is locked at three positions with respect to the substrate. With the function that can be stopped, the above-mentioned flexible use of the sofa bed 50 and compact packing during transportation can be realized with a simple configuration.

[0031]

Since the present invention is constructed as described above, the rotating body is stopped at a reference direction and at a predetermined angle clockwise and counterclockwise from the reference direction. Can be easily configured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment.

FIG. 2 is a front view showing the operation of the embodiment.

FIG. 3 is a schematic perspective view showing a framework of a sofa bed to which the embodiment is attached.

4 (a) is a perspective view and FIG. 4 (b) is a front view showing a conventional example.

FIG. 5 is a front view showing the operation of the conventional example.

FIG. 6 is a front view showing the operation of the conventional example.

FIG. 7 is a front view showing the operation of the conventional example.

8 (a) to 8 (c) are schematic views showing an application example of the present invention.

[Explanation of symbols]

 Reference Signs List 1 board 2 isosceles triangle 3, 23 fool hole 4 pin 5 mounting part 10 joint 11 rotating plate 12 axis 13 guide hole 14 round groove 21 holding plate 50 sofa bed 51 armrest 52 seat 53 backrest 54 legs

Claims (1)

[Claims] A rotating body is overlapped with a substrate, and the rotating body is rotatable around a rotating shaft provided in the overlapping portion, and an axis defined by the rotating body is positioned on the substrate. Stop means is provided on the substrate for stopping in a direction rotated by a predetermined angle clockwise and counterclockwise from the reference direction determined in the above, and is stopped by the substrate in the reference direction. Joint means provided with a locking means extending between the substrate and the rotating body.