JP3485383B2 - Self-closing hinge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-closing hinge for automatically closing an open door.

[0002]

2. Description of the Related Art As a conventional self-closing hinge as described above,
A first cam having a first cam surface with a predetermined inclination angle is attached to the shaft cylinder of the lower blade plate body so as to project, and a second cam having a second cam surface with the same inclination angle as the first cam surface is attached to the upper portion. A configuration in which the first cam is provided in the shaft cylinder of the blade plate main body and is inserted into the shaft cylinder of the upper blade plate main body to bring the first cam and the second cam into contact with each other is, for example, Japanese Utility Model Publication 7-2935. It is disclosed in the publication.

This self-closing hinge has a first cam surface and a second cam surface.
When the door is opened from the closed state where the door is in surface contact with the cam surface, the first cam and the second cam are changed from surface contact to point contact. Therefore, when the turning force in the opening direction of the door is released with the door opened, the weight of the door is added to the second cam, so that the second cam surface comes into surface contact with the first cam surface. That is, the door rotates in the closing direction. The door is closed when the second cam surface is in surface contact with the first cam surface and the force for rotating the door due to the weight of the door stops acting.

[0004]

According to the conventional self-closing hinge, the second cam traces the first cam surface even when the door is swung, so that the first and second cams have the same structure. Machining is difficult, and it is difficult to make the door turn slowly.

The present invention has been made in order to solve the above-mentioned inconvenience, and is an automatic system which can smoothly rotate a door with a simple structure and can easily provide the door with rotation speed. It provides a closed hinge.

[0006]

SUMMARY OF THE INVENTION A self-closing hinge according to the present invention has a pair of hinge members each having a shaft cylinder, and a shaft member of the one hinge member in the axial direction of the shaft cylinder. Move
Can mounted, a cam bushing cam groove is provided with an inclined portion on the outer periphery which faces the circumferential and axial tube of the other hinge member, mounted on the shaft cylinder of the other hinge member, cam
When the piston is connected to the bush via the rod,
The compression coil spring that urges the cam bush downward.
A damper having a externally attached to the barrel of the other hinge member, with attached stop lid to the barrel through the upper cover of the barrel and damper, the tip portion engages with the cam groove cam pin with the door, by opening the pair of hinge members from the closed state relatively elevated mosquito <br/> Mubusshu is urged downward direction by the compression coil spring, a pair of hinge members are closed , Closing motion of a pair of hinges
It is to brake the work .

[0007] In self-closing hinge described above, the countries Mupin, the the outer periphery of the barrel provided with a flange portion abutting desirable.

[0008]

When one of the hinge members of the present invention is attached to the door and the other hinge member is attached to the door frame and the door is opened, the pair of hinge members relatively rotate and the cam pin causes the inclined portion of the cam groove. Is traced in the direction away from the shaft cylinder of one hinge member, the biasing force is accumulated in the compression coil spring. Therefore, when releasing the turning force to open the door, by the urging force of the compression coil spring thus the cam pin traces a direction toward the inclined portion to the barrel of one of the hinge members, the door is closed to Rutotomoni, closed Braking the performance
Is Ru.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below based on the drawings . 1 is a sectional view showing a closed state of the automatic closing hinge, FIG. 2 is a cross-sectional view showing the open state of the automatic closing hinge, FIG. 3 (a), (b) ,
(C), (d) is a side view of the cam bushing for use in automatic closing hinge, vertical sectional view, a bottom view and a side development view, FIG. 4
FIG. 7 is an explanatory diagram showing an open / closed state of a door.

In these figures, D indicates a door and F indicates a door frame to which the door D is attached. Reference numeral 1 denotes an upper hinge member attached to the door D, which is composed of a blade plate 2 and a shaft cylinder 4 integrally formed at one end of the blade plate 2. And
The vane plate 2 is provided with a plurality of mounting holes 3 for fixing screws to the door D. Further, the cylindrical portion 4 is provided with two screw holes 5 into which a set screw 27 described later is screwed, at 180-degree intervals.

Reference numeral 11 denotes a lower hinge member attached to the door frame F, which is composed of a blade plate 12 and a shaft cylinder 14 integrally formed at one end of the blade plate 12. And
The vane plate 12 has a mounting hole 1 for fixing a screw to the door frame F.
A plurality of 3 are provided. Further, in the cylindrical portion 14, a screw hole 15 into which a male screw 73 of a cam pin 71 described later is screwed,
Two are provided at 180 degree intervals.

Reference numeral 21 denotes a cam bush attached to the shaft cylinder 4, and a large diameter portion 2 accommodated in the shaft cylinder 4 in a fitted state.
2 and a cylinder 32 that projects downward from the shaft cylinder 4 and will be described later.
The small-diameter portion 24 that rotatably fits inside the small-diameter portion 33 of the
And a through hole 26 is provided at the center. Further, on the outer circumference of the large-diameter portion 22, two screw holes 23 into which the set screws 27 with hexagonal holes are screwed are provided at 180-degree intervals.

The outer circumference of the small-diameter portion 24 is shown in FIG.
As shown in (d), it rises vertically from the lower end at the vertical portion 25a, rises to the upper left at the first inclined portion 25b, then extends horizontally to the left at the horizontal portion 25c, and extends to the upper left at the second inclined portion 25d. Then, the cam groove 25 that rises to the upper left at the third sloped portion 25e having a steeper angle than the second sloped portion 25d becomes 1
Two are provided at intervals of 80 degrees.

Reference numeral 31 denotes a damper attached to the shaft cylinder 14, which comprises a cylinder 32, a rod 40, a compression coil spring 48, a piston 49, a steel ball 54, a lid 56, and an orifice pin 60. There is. The cylinder 32 is composed of a small diameter portion 33 accommodated in the shaft cylinder 14 in a fitted state and a large diameter portion 38 protruding downward from the shaft cylinder 14.

The small diameter portion 33 has a cam pin 71.
Through-holes 34, which penetrate in the fitted state,
The partition wall 35 is provided with a through hole 36 at the center of the inner periphery below the through hole 34, and a locking recess 37 for locking one end of the compression coil spring 48 is formed at the lower side. It is provided. Further, the large-diameter portion 38 is provided with two through holes 39 through which a set screw 59 penetrates at the lower end portion at 180-degree intervals. The cylinder 32 has a partition wall 35.
The upper lid including the above and the lower case are integrally formed.

The above-mentioned rod 40 has the cam bush 21.
And a large-diameter portion 43 that protrudes to the lower side of the cam bush 21 and penetrates the partition wall 35 of the cylinder 32 and extends indoors. A male screw 42 is formed on the outer periphery of the small diameter portion 41 protruding from the cam bush 21.

Further, in the large diameter portion 43, from the lower end to the partition wall 3
Within the range up to 5, a hole 44 is provided in the center, a plurality of radial holes 45 communicating with the hole 44 are provided, and a male screw 46 is formed on the outer periphery of the lower end. The rod 40 has a male screw 42 in a state where the upper end of the large diameter portion 43 is in contact with the lower end of the cam bush 21 via a flat washer or the like.
Cam bush 21 by means of two nuts 47 screwed into
Attached to.

The above-mentioned piston 49 is accommodated in the large-diameter portion 38 of the cylinder 32, and has a screw hole 50 which is screwed into the male screw 46 of the rod 40 at the center, and a through hole 51 which penetrates in the axial direction. An accommodation portion 52, which is formed at the lower end portion of the through hole 51 and accommodates the steel ball 54 that opens and closes the through hole 51, and a locking recess 53 that locks the other end of the compression coil spring 48 are provided. . The steel ball 54 is supported by the retaining ring 55 that engages with the piston 49 so that the steel ball 54 does not fall out of the housing portion 52.

The above-mentioned lid 56 closes the lower end of the cylinder 32, has a through hole 57 having a female screw portion on the lower side at the center thereof, and a set screw 59 on the outer periphery.
Two screw holes 58 into which are screwed are provided at 180-degree intervals. The above-described orifice pin 60 is formed with a male screw that is screwed into the female screw portion of the through hole 57 of the lid 56.
The tip portion penetrating through is fitted into the hole 44 of the rod 40.

The gap between the hole 44 of the rod 40 and the orifice pin 60 functions as an orifice, and the orifice pin 60 adjusts the orifice to
The braking force can be adjusted. And the cylinder 32
Silicon oil 61 as a viscous fluid is filled in the upper chamber and the lower chamber defined by the small diameter portion 33, the partition wall 35, the large diameter portion 38, the piston 49, and the lid 56.

Reference numeral 71 denotes a cam pin, which is composed of a shaft portion 72 and a flange portion 74, and a male screw 73 which is screwed into the screw hole 15 of the shaft cylinder 14 is formed on the shaft portion 72. The tip portion penetrating the cylinder 32 is engaged with the cam groove 25 of the cam bush 21 in a fitted state. Although the reference numerals are omitted, the cylinder 32 and the rod 4
0, the piston 49, the contact portion with the lid 56, and the contact portion with the lid 56 and the orifice pin 60, silicone oil 61
An O-ring is provided to ensure watertightness so as not to leak water.

Next, the operation will be described. Note that FIG.
As shown by the solid line, when the door D is in the closed state where both blade plates 2 and 12 are substantially in contact with each other, each part is in the state shown in FIG. 1, and the cam pin 71 is the third inclined part of the cam groove 25. 25
It is located at e. In this state, when the door D is rotated to open, that is, when the solid line door D in FIG. 4 is rotated clockwise, the cam pin 71 becomes the fixed side and the cam bush 21 becomes the rotating side. , The cam pin 71 is the third
Since the engagement position is moved from the inclined portion 25e to the second inclined portion 25d, the door D rotates while slightly rising.

When the door D rises in this way, the piston 4
9 also rises, the compression coil spring 48 is compressed, and the volume of the upper chamber between the partition wall 35 and the piston 49 decreases, so that the silicone oil 61 passes from the upper chamber to the lower chamber through the through hole 51. Then, the turning force for opening the door D is not braked. Then, when the cam pin 71 moves the engagement position from the second inclined portion 25d to the horizontal portion 25c, the door D does not move up even if it is rotated, and even if the turning force for opening the door D is released, the door D The turning force for closing the door D does not act, and the open state of the door D can be maintained as shown by the chain double-dashed line in FIG.

When the door D is maintained in the open state in this way, each part changes from the state shown in FIG. 1 to the state shown in FIG.
The range in which this door D can be kept open is
The door D is opened from 98 degrees, and it is indicated by a chain double-dashed line in FIG.
It is set in the range of 70 degrees.

Next, when the door D in the open state described above is rotated to close it, that is, the door D indicated by a chain double-dashed line in FIG. 4 is rotated counterclockwise, the cam pin 71 causes the horizontal portion 25c. After moving the engagement position from the second inclined portion 25d to the second inclined portion 25d, the engagement position is moved from the second inclined portion 25d to the third inclined portion 25e. Then, the cam pin 71 has the horizontal portion 2
When going from 5c to the second inclined portion 25d and the third inclined portion 25e, the door D rotates while slightly descending.

When the door D descends in this way, the piston 4
Since 9 also descends, the compression coil spring 48 expands and the volume between the partition wall 35 and the piston 49 increases, so that the silicone oil 61 tries to flow from the lower chamber to the upper chamber. However, since the through hole 51 of the piston 49 is closed by the steel ball 54, the silicone oil 61 is
Flowing from the lower chamber to the upper chamber through the gap between the hole 44 of the rod 40 functioning as an orifice and the orifice pin 60, the hole 44 and the hole 45, the turning force for closing the door D is put into a braking state.

Even when the door D is released from the hand when the cam pin 71 starts to engage with the second inclined portion 25d, the weight of the door D and the biasing force of the compression coil spring 48 cause the cam pin 71 to move to the second position. Since the inclined portion 25d is engaged with the third inclined portion 25e, the door D is automatically closed. And the third
Since the inclination angle of the inclined portion 25e is steeper than the inclination angle of the second inclined portion 25d, the closed state of the door D can be reliably maintained.

When the door D is closed in this way, each part changes from the state shown in FIG. 2 to the state shown in FIG. And the door D
It is the cam pin 71 that brakes the turning force that closes the
Is engaged with the second inclined portion 25d and the third inclined portion 25e, that is, the range in which the door D rotates in the closing direction from the opening degree of 98 degrees to the closed state.

[0029] As described above, the cam pin to cams groove 25 7
Since 1 is engaged, even if the door D is rapidly opened and closed, the cam pin 71 does not come out of the cam groove 25.
It is possible to reliably brake the revolving power when closing, and to obtain a damper effect. The cam pin 71 that traces the cam groove 25 needs to have strength. Since the cam pin 71 also functions as a mounting screw for mounting the damper 31 to the shaft cylinder 14, the number of parts and the number of mounting steps can be reduced. it can.

Further, since the two cam pins 71 are arranged at an interval of 180 degrees, it is possible to secure further strength, and the damper 3
1 can be firmly attached to the barrel 14. Further, the cam pin 71 is provided with a flange portion 74, and the flange portion 74 is brought into contact with the outer circumference of the shaft cylinder 14, whereby the gravity of the door D, the twisting force due to the rotation of the door D, and the biasing force of the compression coil spring 48 are exerted. Even if it works, the shaft portion 72 is not supported in the axial direction of the barrel 14, so that the cam pin 71 can be maintained in a stable state.

The lower side, that is, the cam bush 21
Rotate the nut 47 close to to rotate the rod 40,
Alternatively, the urging force of the compression coil spring 48 can be changed by directly rotating the rod 40 and changing the relative position between the rod 40 and the piston 49.
The operability according to the weight of the door D can be obtained. Further, since the cassette-type damper 31 is attached to the shaft cylinder 14 by the cam pin 71, the shaft cylinder 1 is compared with the case where the damper is structured by using the shaft cylinder 14 as a cylinder.
Since it is not necessary to perform processing such as welding and sealing on 4, it can be manufactured at low cost.

Further, since the damper 31 is a cassette type, various kinds of compression coil springs 48 having different biasing forces for closing the door D are prepared, and the damper 31 is selected in consideration of the weight of the door D. By doing so, as mentioned above,
The operability that is not affected by the weight of the door D can be obtained without adjusting the biasing force of the compression coil spring 48 on site. Then, a cam groove 25 is formed in the cam bush 21,
Since the door D can be smoothly rotated by engaging the cam pin 71 with the cam groove 25, the structure for smoothly rotating the door D becomes simple.

Further, since the cam bush 25 may be formed with the cam groove 25, the machining of the cam is facilitated, and the rotation of the door D can be easily adjusted, and the cam pin 71 is provided with the cam groove 25. Can be traced easily, so that the shape of the cam groove 25 can be made flexible.

[0034] Figure 5 is a sectional view showing the open state of the automatic closing hinge, FIG. 6 is a perspective view of the cam bushing for use in automatic closing hinge, identical to the same or corresponding parts in FIG. 1 to FIG. 4 The reference numerals are given and the description is omitted. Incidentally, those which close the door by the biasing force of the compression coil spring.

In FIGS. 5 and 6, reference numeral 23A denotes a guide groove, which is provided on the outer circumference of the large-diameter portion 22 of the cam bush 21.
Two are provided at 0 degree intervals. And the guide groove 23A
Is formed to have a predetermined length in the axial direction by the diameter of the set screw 27, and the set screw 27 can be engaged and moved in a fitted state. The other portions are configured in the same manner as FIGS.

Next, regarding the operation, the part different from the previous operation will be described. First, when opening the door D in the closed formation state, the engagement position between the cam groove 25 of the cam pin 71 is changed. Since the cam bush 21 is provided with the guide groove 23A, the cam bush 21 rises, so that the set screw 27 relatively descends in the cam groove 23A.
With the door D maintained open, the state shown in FIG. 5 is obtained. Also,
When the door D in the open state is closed, the cam bush 21
Is lowered, the set screw 27 relatively rises in the cam groove 23A, and the door D is closed.

As described above, this self-closing hinge has
However, the same effect as that of the self-closing hinge of FIGS. 1 to 4 can be obtained. Then, the guide groove 2 is formed on the cam bush 21.
3A is provided and the cam bush 21 is moved up and down so that the set screw 27 relatively moves up and down in the cam groove 23A. Therefore, even if the door D is opened and closed, it does not move up and down. In the closed state, the upper end of the door D and the door frame F
There is no need to provide a gap between them, and the appearance does not feel uncomfortable, and both shaft cylinders 4 and 14 can be brought into contact with each other.

[0038] Although described in example mounting the dampers 31 as cassette type, engaged without using the damper 31, the mounting member corresponding to the upper cover to the barrel 14 by the cam pin 71, the cam pin 71 in the cam groove 25 The door D is closed by its own weight, the upper lid is attached to the shaft cylinder 14 with the cam pin 71, the cam pin 71 is engaged with the cam groove 25, and a compression coil spring is provided by a locking member corresponding to the rod 40 and the piston 49. 48 is loaded, and the door D is loaded by its own weight and the biasing force of the compression coil spring 48, or the compression coil spring 48.
It may be configured to be closed by the urging force of.

The damper may be constructed by using the shaft cylinder 14 as a case instead of the cassette type damper. The shape of the cam groove 25 is the same as that of the above-described example except for the first
The inclined portion 25b is eliminated and the vertical portion 25a is directly connected to the horizontal portion 25.
The door D may be connected to c, may be a single inclined part that rises to the upper left from the vertical part 25a at a predetermined inclination angle, or may have a shape that allows the door D to be opened and closed by 180 degrees or more by changing the lengths of the two vertical parts 25a.

[0040]

As described above, according to the present invention, the cam pin tracing the cam groove needs to have strength, and this cam pin also has the function of a mounting screw for mounting the cylinder on the barrel. The number of points and the number of mounting steps can be reduced. In addition, in the shaft tube of one hinge member,
A cam bush is attached so that it can move in the axial direction of the shaft cylinder.
Therefore, even if you open and close the door, it will not move up and down, so close the door.
In the assembled state, a gap is provided between the upper end of the door and the door frame
There is no need for it, and there is no discomfort in the appearance. By providing a flange portion on the cam pin and bringing the flange portion into contact with the outer circumference of the barrel, the shaft portion of the cam pin is not supported in the axial direction of the barrel, so that the cam pin can be maintained in a stable state. it can.

Further, since the door can be smoothly rotated by forming the cam groove in the cam bush and engaging the cam pin with the cam groove, the structure for smoothly rotating the door becomes simple. . Further, since it is only necessary to form the cam groove on the cam bush, it becomes easy to process the cam,
The door can be swung easily and the cam pin can easily trace the cam groove, so that the cam groove can be freely shaped.

[Brief description of drawings]

1 is a cross-sectional view showing a closed state of the automatic closed hinge.

2 is a sectional view showing the open state of the automatic closed hinge.

[3] (a), (b), (c), (d) is a side view of the cam bushing for use in automatic closing hinge, vertical sectional view, a bottom view and a side development view.

FIG. 4 is an explanatory diagram showing an open / closed state of a door.

5 is a cross-sectional view showing the open state of the automatic closed hinge.

6 is a perspective view of the cam bushing for use in automatic closed hinge.

[Explanation of symbols]

1 Upper hinge member 2,12 blades 3,13 Mounting hole 4,14 cylinder 5,15 screw hole 11 Lower hinge member 21 cam bush 23A guide groove 25 cam groove 25a vertical part 25b First inclined portion 25c horizontal part 25d Second inclined part 25e Third inclined portion 27 Set screw 31 damper 32 cylinders 40 rod 42 male screw 44 holes 45 holes 47 nuts 48 compression coil spring 49 pistons 55 retaining ring 56 lid 60 Orifice pin 61 Silicon oil 71 cam pin 72 Shaft 74 Flange

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Claims (2)

(57) [Claims] 1. A pair of hinge members each having a shaft tube, and a shaft member of one of the hinge members, which is moved in the axial direction of the shaft tube.
Rotatably mounted, a cam bushing cam groove is provided with an inclined portion on the outer periphery facing the inside barrel periphery of the other hinge member, mounted within the barrel of the other hinge member, said cam
When the piston is connected to the bush via the rod,
A compression coil for urging the cam bush downward
A damper having a spring, mounted from the outside barrel of the other hinge member, through the top cover of the barrel and the damper with attached stop the upper lid on the barrel, the cam groove distal portion And a cam pin that engages with the cam pin, the cam bush that is relatively raised is released by opening the pair of hinge members from the closed state.
The pair of hinge members are closed and the closing operation of the pair of hinges is braked by being urged downward by a spring .
It is a self-closing hinge. 2. The self-closing hinge according to claim 1, wherein the cam pin is a flange portion that abuts an outer circumference of the barrel.
The a, self-closing type butterfly numbers, characterized in that.