JP5535580B2 - Automatic door hinge - Google Patents

Description

The present invention relates to a door hinge that can automatically close a door in an open state or open a door in a closed state automatically.

Conventionally, in automatic door hinges used for opening and closing doors such as entrance doors and conference room doors, the structure is complicated, and hydraulic and pneumatic piston cylinders are included inside, so it is expensive and large overall, and it is expensive. In addition, it is difficult to use as an interior door in an apartment or the like because of its appearance and high price, and in the case of using a hydraulic piston cylinder, there are problems such as oil leaks and surroundings.

Patent Document 1 proposes that a cam groove mechanism formed on a cam bush and a hydraulic damper may be used in combination or only a cam bush may be used.

Japanese Patent No. 3485383

However, the above-mentioned Patent Document 1 has the inconvenience that it is necessary to prepare various types of cassette-type dampers having different urging forces depending on the weight of the door. In reality, in addition to the weight of the door, ventilation conditions and Since the situation changes depending on the sealed room, etc., adjustments at the site will be necessary.
The present invention adjusts the weight of the door by adjusting the start of the closing operation by urging the compression coil spring, and adjusting the speed of closing the door by the cam groove angle formed in the cam bush and the cam pin tracing the cam groove. Therefore, providing the door closing speed does not change even if the door weight changes, and providing a hinge function that can be easily used as the automatic door opening hinge using the same function as necessary. It is in.

According to the present invention, the relationship between the restoring force against the bias of the compression coil spring, the inclination angle of the cam groove formed in the cam bush, and the thickness of the cam pin that traces it is such that the strength and size can be adapted to each purpose. The above problem has been solved by providing that the damper is configured to have an appropriate door closing speed regardless of the weight, especially in the function part of the damper of the inclination angle of the cam groove. It is.

When using an automatic door hinge, if it is too large, the appearance of the entire door is impaired, and it is often attached to the center of the function, but the product of the present invention has a slim diameter of 17 mm. For this reason, there is an effect that it can be used for a door with an emphasis on design without impairing the design feeling of the entire door.

Moreover, since the upper door side and the lower frame side of the pair of hinges are separated during installation, the thickness of the hinges does not overlap with each other, just like a general flag hinge. Since it is attached separately on the side and the frame side, and only the door side is inserted later, it is easy to attach and saves the cost and time of installation.

Furthermore, since the number of parts is small, there is an effect that it can be made inexpensive and there is no need to worry about oil leakage.

In addition, the automatic door opening function can be easily made as necessary.

Names and exploded views of each part of the automatic door hinge Sectional view showing the closed state of the automatic door hinge Sectional view showing the opened state of the automatic door hinge (a), (b), (c), (d) are a side view, a longitudinal sectional view, a bottom view, and a side development view of a cam bush used for an automatic door hinge. FIG. 5 is an explanatory view showing an open / closed state of the door.

Hereinafter, a description will be given based on the drawings. FIG. 1 is a name and exploded view of each member, FIG. 2 is a cross-sectional view showing a closed state of an automatic door hinge, FIG. 3 is a cross-sectional view showing an open state of an automatic door hinge, and FIGS. ), (C), (d) are a side view, a longitudinal sectional view, a bottom view and a side development view of a cam bush used for an automatic opening / closing door hinge, and FIG. 5 is an explanatory view showing an open / closed state of the door.

In these drawings, E indicates a door, and F indicates a door frame to which the door E is attached. Reference numeral 1 denotes an upper hinge member attached to the door E. The upper hinge member 1 includes a blade plate 15 and a shaft cylinder 19 formed integrally with one end of the blade plate 15. The blade 15 is provided with a plurality of mounting holes 17 for screwing the door E.

Reference numeral 2 denotes a lower hinge member attached to the door frame F, which is composed of a blade plate 16 and a shaft cylinder 20 formed integrally with one end of the blade plate 16. The blade plate 16 is provided with a plurality of mounting holes 18 for screwing the door frame F.

Reference numeral 7 denotes a washer fixedly attached to the upper end of the shaft cylinder 20.

Reference numeral 10 denotes a cam bush attached to the shaft cylinder 20, and the cam bush 10 has a cylindrical shape as shown in FIG. 3B, and the cylinder 5 has a shaft 5 (corresponding to the shaft core in the present invention). And the cam pin 11 is inserted in the hole 21 provided in the shaft 5. The cam bush 10 is attached so as to be movable up and down along a groove provided inside the shaft cylinder 20.

Further, when the cam bush 10, the shaft 5 and the cam pin 11 are inserted into the shaft cylinder 20, the ball bearing 9 and the ball bearing receiver 8 are attached to the ball bearing receiver 23 provided on the shaft 5 side in order to reduce friction. The shaft cylinder 20 is inserted from below.

A compression coil spring 12 is inserted into the shaft cylinder 20 and is mounted on the shaft cylinder 20 together with 13 washers and 14 pressure adjusting screws.

Reference numeral 4 denotes a bearing mounted in the shaft cylinder 19. The bearing 4 is configured to be integrated with the upper hinge member 1 by inserting the protruding portion of the bearing 4 together in a groove provided inside the shaft cylinder 19 to restrict rotation.

Reference numeral 6 denotes a bush that reduces friction generated when the upper hinge member 1 and the lower hinge member 2 are rotated around the shaft 5.

Reference numeral 3 denotes an end cap attached to the shaft cylinder 19 and the shaft cylinder 20. The end cap 3 is attached to prevent the entry of dust and the like and improve the appearance of the appearance when the automatic opening / closing door hinge is completely attached.

Next, the operation will be described. As shown in FIG. 2, when the door is in the closed state, the cam pin 11 attached to the shaft 5 is positioned at the bottom of the cam groove 22. When this shifts to the open state, the shaft 5 rotates in conjunction with the rotational movement of the upper hinge member 1. At that time, the cam pin rotates while being traced in the cam groove 22, and the cam bush 10 is pushed downward. This condition is the open state in FIG.

At this time, the compression coil spring 12 is pushed down by the cam bush 10, and the restoring force of the compression coil spring 12 generates an action force opposite to the movement from the closed state to the open state. As a result, the door is closed.

At this time, the change of the angle of the cam groove 22 has the following effects on the opening and closing of the door.
The cam pin 11 is positioned at 10a in FIG. 4 (d) in a state opened 90 degrees from the closed state. This state is a position where the door is temporarily fixed when the door is opened 90 degrees, and is necessary when the door is attached or for maintaining the opened state. Next, the state from 85 degrees to 21 degrees is a section in which the cam pin 11 is located at 10b and is constituted by a straight cam groove 22, which allows the door to be closed without resistance. Next, in the state of 20 ° to 0 °, the cam pin 11 is located at 10c, and the latch provided on the door is securely stored in the strike provided on the door frame. Suddenly, the closing power is strengthened.

Thus, by changing the inclination angle and shape of the cam groove 22, the opening / closing angle can be increased and the speed can be adjusted.

Further, the closing force of the door can be adjusted by the pressure adjusting screw 14 at the lower part of the compression coil spring 12. When the pressure adjusting screw attached to the shaft cylinder 20 is tightened, the compression coil spring is compressed and the door can be closed with a stronger force.

When the automatic opening / closing door hinge is in the open state, the compression coil spring 12 is pushed down by the cylindrical cam 10. At this time, the upper hinge member 1 is rotated 90 degrees, inserted into the shaft 5, and closed. When it is in the completed state, the door can be opened automatically.

1. Upper hinge member
2, Lower hinge member
3, end cap
4, bearing
5, axis
6, bush
7, washer
8, ball bearing receiver
9, ball bearing
10, cam bush
11, cam pin
12, compression coil spring
13, washer
14, pressure adjusting screw
15, 16, slats
17, 18, mounting hole
19, 20, shaft cylinder
21, hole
22, cam groove
23, ball bearing receiver

Claims (4)

An automatic opening / closing door hinge comprising a pair of upper hinge member and lower hinge member each having a blade plate and a cylindrical shaft cylinder integrally formed,
A cylindrical cam bush formed by opening a cam groove having an inclined shape in the peripheral surface in the shaft cylinder of the lower hinge member is moved up and down along the groove recessed in the shaft cylinder. Insert and install as possible,
Insert and install the bearing in a state where the rotation is restricted in the shaft of the upper hinge member,
A shaft core having a lower end portion engaged with a cylindrical hole provided in the center of the cam bush is disposed, and a cam pin inserted into the lower end portion of the shaft core is engaged with the cam groove, thereby And the shaft of the lower hinge member are engaged, and the upper end portion of the shaft core protruding upward from the shaft tube in which the cam bush is inserted is inserted into the bearing in a state where rotation is restricted, Engaging the shaft core and the shaft of the upper hinge member;
A compression coil spring that is urged downward by the cam bush with the cam pin as a fulcrum is mounted in the shaft of the lower hinge member,
In the cam bush, both the upper end portion and the lower end portion of the cam groove are formed so as to change the inclination angle and obliquely downward with the linear inclined central portion,
By releasing the pair of upper and lower hinge members from the closed state, the cam pin located at the lower end portion of the cam groove rotates to the upper end portion while rotating along the peripheral surface of the cam bush. As the cam bush moves relatively downward by moving, the compression coil spring is extended to be in an open state,
By closing the pair of upper and lower hinge members from the open state, the cam pin positioned at the upper end of the cam groove moves to the lower end to use the cam pin as a fulcrum. By urging the bush in the upward direction, the pair of the pair of the cam groove is caused by the damper function due to the cam pin moving along the inclination of the linear center portion of the cam groove and the return operation by the restoring force of the compression coil spring. An automatic opening / closing door hinge characterized by being in a closed state while suppressing the closing operation of an upper hinge member and a lower hinge member. The cam groove, the angle of the open state of the pair of upper hinge member and a lower hinge member is stationary in opening angle of about 90 degrees by positioning the cam pin to tilt part of the diagonally downward of the upper end tentative It has a stop function, and the transition to the tacking function is released closing direction by moving the said cam pin from above end at opening angle of approximately 85 degrees to the linear slope portion of the central portion, about 85 The damper function is activated by positioning the cam pin on the linear inclined portion in the central portion at an opening angle of from about 21 degrees to about 21 degrees, and the opening angle of about 20 degrees to 0 degrees where the function of becoming a fully closed state works. automatic door hinge according to claim 1, characterized in that it is configured to be fully closed state by locating the cam pin to tilt part of the obliquely below the lower end. The automatic opening / closing door hinge according to claim 1 or 2, wherein a diameter of each shaft cylinder of the upper hinge member and the lower hinge member is 15 mm to 20 mm. When the bearing of the upper hinge member is inserted into the upper end portion of the shaft core protruding from the shaft tube of the lower hinge member, the pair of blades are opened 90 degrees around the shaft core. The automatic opening / closing door hinge according to any one of claims 1 to 3, wherein the automatic opening / closing door hinge can be configured as an automatic opening hinge by inserting the restoring force of the compression coil spring in the opening direction.

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