JPH0518475Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a hinge that rotatably connects and supports a pair of plate bodies.

(Prior Art) This type of hinge is used for folding doors for furniture, for example, as described in Japanese Utility Model Application Publication No. 60-68268, where opposing edges of a pair of door bodies are connected by hinges. They are rotatably connected, and sliding bodies that slide along the upper and lower edges of the furniture body are attached to the upper and lower parts of each outer end of the connected door bodies, and both door bodies are parallel to each other. The front side of the furniture body is closed in this state, and the front side of the furniture body is opened by sliding the sliding body and folding both door bodies at the hinge portion.

As described in the above publication, the conventional hinge includes a rectangular plate-shaped hinge body that is screwed to the back of each door body, and a hinge shaft that rotatably connects the two hinge bodies. Both door bodies are rotatably connected and supported around the hinge axis. Also, a cam member disposed outside the hinge shaft and integrally coupled to one hinge body, a contact member slidably disposed on the other hinge body and having an end abutting the cam member, and this abutment member. It is equipped with a coil spring that presses the contact member toward the cam member, so that the furniture body can be held in a closed state by both door bodies, that is, both door bodies can be held in a parallel state.

(Problem to be solved by the invention) By the way, especially in the case of large and heavy door bodies, it is necessary to maintain the pair of door bodies in a closed state.
Requires very large holding force.

However, in conventional hinges, the end of the contact member pressed by the coil spring is in direct pressure contact with the cam member, so if the holding force is increased, the contact pressure between the cam member and the contact member becomes extremely large. When the spring member and the contact member slide as the two hinge bodies open and close, the sliding resistance is extremely large, making it difficult to open and close the door smoothly, and reducing the durability of the cam member and the contact member. There is a problem of low sex.

The present invention was developed in view of the above points, and provides a hinge with a durable structure that allows the hinge bodies to open and close smoothly even if the holding force when the two hinge bodies are expanded is increased. The purpose is to

[Structure of the idea]

(Means for Solving the Problems) The present invention provides a pair of hinge bodies 12a, 12b fixed to opposing edges of a pair of plate bodies 3, 3, respectively.
, a hinge shaft 20 rotatably connecting the two hinge bodies 12a, 12b, and a pressing shaft portion 33, 33 disposed on the one hinge body 12a at the end thereof.
A pair of torsion coil springs 30a and 30b provided with
And this pair of torsion coil springs 30a, 30b
A roller 35 is rotatably fitted between both ends of the pressing shaft portions 33, 33 and integrally connected, and a roller 35 is disposed on the other hinge body 12b and is pressed by the pair of torsion coil springs 30a, 30b. The cam 25 is provided with a cam 25 that is in pressure contact with a roller 35 to maintain the expanded state when the two hinge bodies 12a, 12b are expanded.

(Function) In the present invention, the roller 35 presses the shaft portions 33, 33 of the pair of torsion coil springs 30a, 30b.
A pair of torsion coil springs 30 connected between both ends of
The combined pressing forces of a and 30b are transmitted to the cam 25.

As the hinge bodies 12a and 12b open and close, the rollers 35, which are rotatable on the pressing shafts 33 and 33, roll while transmitting a pressing force to the cam 25. When both hinge bodies 12a, 12b are expanded, the pressing force transmitted to the cam 25 causes
The expanded state is elastically maintained.

(Embodiment) Hereinafter, the configuration of an embodiment of the present invention will be described with reference to the drawings.

In Fig. 5, reference numeral 1 denotes a furniture body with a storage space inside, and a folding door 2 on the front side of the furniture body 1.
2 are arranged so that they can be opened and closed. This folding door 2
The door bodies 3, 3 as a pair of plates connected by a hinge 11, which will be described later, are rotatably connected, and one side of the folding door 2 is connected to the side plate 1 of the furniture body 1.
A is rotatably fixed to the folding door 2 by slide hinges 4, 4, and at the top and bottom of the other side of the folding door 2,
Rails 5, 5 provided on the upper and lower edges of the furniture body 1
Sliding bodies 6, 6 that move along are provided, and when the door bodies 3, 3 are parallel to each other, they close the front surface of the furniture body 1, and when the door bodies 3, 3 are folded, the furniture body 1 is closed. The front is now open.

A hinge 1 that rotatably connects the door bodies 3, 3.
1 has a pair of disc-shaped hinge bodies 12a, 12b, as shown in FIGS. Edge portions 14a,
14b is provided, and the hinge bodies 12a, 12
Mounting surfaces 15a, 15b on the back side of b and edge 14a,
14b (for example, 5 mm as shown in FIG. 3) is the embedding dimension in the door bodies 3, 3.

Further, at the opposing edges of both hinge bodies 12a, 12b, rising parts 13a, 13b and edges 14a, 14b are notched linearly, and a connecting edge is formed where the hinge bodies 12a, 12b are joined in a parallel state. 16a and 16b are provided, and the hinge body 12
Bearing holes 17a at both ends facing the connecting edge 16a of a.
Bearing parts 18b, 18b are provided with bearing parts 18a, 18a having bearing holes 17a, and bearing holes 17b, 17b are provided at inner positions of the bearing parts 18a, 18a facing the connecting edge 16b of the hinge main body 12b.
are provided, and both bearing portions 18a, 18
Collars 19 and 19 are respectively interposed between the collars 19 and 19, and the hinge shaft 20 is inserted into the bearing holes 18a and 18b, so that the hinge bodies 12a and 12b are rotatably connected.

Note that the center of the hinge shaft 20, that is, the bearing hole 17
The centers of a and 17b are perpendicular to the connecting edges 16a and 16b, and the width B (shown in FIG. It is arranged at a position within a range of ~3 mm.

The hinge shaft 20 between the bearing parts 18b, 18b includes
A camshaft 21 made of synthetic resin, for example, is arranged. The camshaft 21 has a cylindrical portion 22 that is rotatably fitted to the outer periphery of the hinge shaft 20, and has both ends of the cylindrical portion 22 in contact with the hinge main body 12b. Stoppers 23, 23 are provided to prevent rotation in the clockwise direction (Figure 3), and a hinge body 12b is provided at the center of the cylindrical portion 22.
contacting the connecting edge 16b of the cylindrical portion 22
A stopper 24 is provided to prevent rotation in the counterclockwise direction (in the figure), and a substantially chevron-shaped cam is provided at the center of the cylinder portion 22 on the opposite side to the stoppers 23 and 24, and is slightly displaced toward the hinge body 12a. 25 are provided. This cam 25 is connected to the hinge body 12a.
One side 25a facing the hinge body 12b is formed into a substantially flat surface having a recess 25b, and the other side 25 facing the hinge main body 12b
c is formed into a circular arc surface. Note that a stopper 24 is provided at the center of the connecting edge 16a of the hinge body 12a.
A notch 26 is provided to prevent interference.

A support portion 28 having support holes 27, 27 adjacent to both bearing portions 18a, 18a of the hinge body 12a,
28 are provided respectively, and these support parts 28, 28
A spring body 30 is disposed between them by a support shaft 29 having a spring action and having a C-shaped cross section and inserted into the support holes 27 and crimped. This spring body 30 consists of a pair of torsion coil springs 30a and 30b,
The torsion coil springs 30a, 30b have respective ends 31, 31 in contact with the hinge main body 12a, and are provided with coil parts 32, 32 that fit on the outer periphery of the support shaft 29 from the respective ends 31, 31, Pressing shaft portions 33, 33 are provided from the coil portions 32, 32, which are bent parallel to and opposite to the camshaft 21, and have elastic force in the direction of the camshaft 21.

Further, a roller 35 formed of, for example, synthetic resin and having a fitting hole 34 is rotatably fitted between the ends of the pressing shaft portions 33, 33 of the torsion coil springs 30a, 30b, and integrally connected. Supported. The roller 35 elastically contacts the cam 25, and while in contact with one side 25a of the cam 25, the connecting edges 16a, 16b of both hinge bodies 12a, 12b contact, and both hinge bodies 12
a and 12b are maintained in a parallel state. Note that the coil portion 3 of the spring body 30 is located between the support portions 28 and 28.
An escape hole 36 is formed to prevent interference with the spring bodies 2 and 32, and an inclined portion 37 is provided from the escape hole 36 onto the hinge main body 12a, with which the ends 31, 31 of the spring body 30 come into contact.

Further, mounting holes 38 are formed in three locations in each of the hinge bodies 12a and 12b, and
A plurality of thin portions 39 are formed on the outer periphery of the rising portion 13a of the hinge body 12b, and thin portions 40 are formed at several locations in the center and peripheral portion of the hinge body 12b.

Next, the operation of this embodiment will be explained.

A pair of door bodies 3, 3 rotatably connected by a hinge 11 has hinge bodies 12 at two or more places on the back surfaces 3b, 3b of the edges 7, 7 to be connected.
A recess 8 having a circular inner diameter and a depth of width A (for example, 5 mm as shown in FIG. 3), into which the outer periphery of parts a and 12b can be fitted;
8 are formed respectively, and arcuate surface portions 9, 9 are formed on the surfaces 3a, 3a side of the edges 7, 7, respectively.

Then, align the edges 7, 7 of the door bodies 3, 3, fit the hinge bodies 12a, 12b of each hinge 11 into the respective recesses 8, 8 of the edges 7, 7, and make the plurality of mounting holes 38. A set screw 41 is screwed in through the hinge 11, and each hinge 11 connects and fixes both door bodies 3, 3. In this fixed state of the hinge 11, the center of the hinge shaft 20 is located at the middle position between the edges 7, 7 of the door bodies 3, 3, and the width B (as shown in FIG. )
For example, they are placed at a position separated by 1 mm.

When the door bodies 3, 3 are parallel, that is, both hinge bodies 12a, 12b of the hinge 11 are parallel, the roller 35, which is pressed by the pair of torsion coil springs 30a, 30b, touches one side 25 of the cam 25 of the cam shaft 21.
By elastically abutting against a, the door bodies 3, 3 are held in their parallel state. Therefore, the door bodies 3, 3 are held in a state in which the front surface of the furniture body 1 is closed by the hinge 11.

When the door bodies 3, 3 are folded so that the back surfaces 3b, 3b sides are aligned, the roller 35 rolls toward the top of the one side 25a of the cam 25, and the roller 35 climbs over the one side 25a. When the cam 25 comes into contact with the other side portion 25c formed in an arcuate surface, the cam 25 is rotated counterclockwise in FIGS. 22. When this roller 33 is in contact with the cylindrical part 22, the roller 35 is only in pressure contact with the cylindrical part 22, so the roller 35 rolls on the circumferential surface of the cylindrical part 22 and folds the door bodies 3, 3. Can be folded.

Note that the rollers 35 connect both ends of the pressing shaft portions 33, 33 of the pair of torsion coil springs 30a, 30b, and the pair of torsion coil springs 30a, 3
Since the pressing force of 0b is collectively transmitted to the cam 25, a large holding force can be obtained to hold the door bodies 3, 3 in a parallel state.

Moreover, even if the holding force is increased, the pressing shaft portions 33, 33 of the pair of torsion coil springs 30a, 30b
The roller 35, which is freely rotatable, comes into contact with the cam 25, and as the hinge bodies 12a and 12b open and close, the roller 35 rolls against the cam 25, so the resistance between the roller 35 and the cam 25 is small. The opening and closing operations of both hinge bodies 12a and 12b can be performed smoothly, and the durability of the cam 25 is greatly improved.

In addition, when the door bodies 3, 3 are folded, the door body 3,
The gap C between the edges 7, 7 of 3 (shown in FIG. 4) has a maximum value twice the width B. This is hinge shaft 2
This is because the center of 0 is displaced by the width B from one door body 3 and the other door body 3. For example, if the width B is 1 mm, the gap C will be 2 mm at maximum, and this gap C With the value of
Even if it is placed in between, it will not get caught in between, so it is safe and will not get caught.

Further, since the edges 7, 7 of the door bodies 3, 3 are formed with arcuate surface portions 9, 9, fingers are prevented from being caught between the edges 7, 7 of the door bodies 3, 3.

In addition, the hinge shaft 20 and the back surface 3b of the door body 3, 3,
The reason why the width B with respect to 3b is set in the range of 1 to 3 mm is to take into account warping, etc. of the door bodies 3, 3, and even if the dimensional accuracy of the edges 7, 7 of the door bodies 3, 3 is accurate. For example, the width B may be set close to 0 mm.

Further, the hinge 11 has hinge bodies 12a, 1
2b into the recesses 8, 8 of the door bodies 3, 3, the hinge shaft 20 of the hinge 11 is positioned.
center and edges 7, 7 of both door bodies 3, 3 and back surface 3
b, 3b and the position between the edges 7, 7 of both door bodies 3, 3 are in a predetermined arrangement. especially multiple hinges 1
1 along the edges 7, 7 of the door bodies 3, 3.

Furthermore, in the embodiment, the hinge bodies 12a, 1
Although the outer periphery of the hinge body 2b and the recesses 8, 8 of the door bodies 3, 3 may be square instead of circular, the hinge body 12
By making the outer periphery of a, 12b and the recesses 8, 8 circular, the recesses 8, 8 can be easily formed by a single operation of pressing and cutting with a cutting tool such as an end mill. .

Further, in the above embodiment, the door bodies 3, 3 of a folding door of furniture are shown as a pair of plate bodies to which the hinge 11 is attached, but it is not limited to the door bodies 3, 3 of a folding door. Any plate body that can be moved may be used.

[Effect of idea]

According to the present invention, the rollers connect both ends of the pressing shaft portions of the pair of torsion coil springs, and the combined pressing force of the pair of torsion coil springs is transmitted to the cam, so that the pair of hinge bodies can be expanded. A large holding force can be obtained to maintain the state. Moreover, even if the holding force is increased, the rotatable roller on the pressing shaft of the pair of torsion coil springs will come into contact with the cam, and the roller will roll against the cam as both hinge bodies open and close. , the resistance between the roller and the cam is small, the opening and closing operations of both hinge bodies can be performed smoothly, and the durability of the cam can be greatly improved. Furthermore, since the pair of torsion coil springs are provided as separate parts and connected by rollers, the torsion coil springs can be manufactured easily and at low cost.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the hinge of the present invention in a used state, Fig. 2 is a side view thereof, Fig. 3 is a cross-sectional view taken from - of Fig. 2, and Fig. 4 is a cross-section of the hinge in its movable state. FIG. 5 is a perspective view of furniture showing an example in which the hinge is used. 3... Door body as a plate body, 12a, 12b...
Hinge body, 20... Hinge shaft, 25... Cam,
30a, 30b...Torsion coil spring, 33...
Pressing shaft portion, 35...roller.

Claims (1)

[Claims for Utility Model Registration] A pair of hinge bodies fixed to opposing edges of a pair of plates, a hinge shaft rotatably connecting the two hinge bodies, and a hinge shaft disposed on the one hinge body. a pair of torsion coil springs each having a pressing shaft at its end; a roller rotatably fitted between both ends of the pressing shaft of the pair of torsion coil springs and integrally connected; and the other one. 1. A hinge comprising: a cam disposed on the hinge body, in which a roller pressed by the pair of torsion coil springs comes into pressure contact, and maintains the expanded state when both hinge bodies are expanded.