KR200223101Y1 - Pivot-hinge for door - Google Patents

Abstract

The present invention relates to a pivot hinge for a door, and provides a pivot hinge for a door that stops or automatically closes an open door at a predetermined angle as well as function as a pivot hinge. That is, a pivot hinge for the door to be opened and closed by fixing one side of the door to the door frame, the upper hinge is installed on the upper side of one side of the door frame and the corresponding door; And a lower hinge installed at one lower portion of the door frame corresponding to the upper hinge and a lower portion of the door corresponding to the upper hinge, wherein the lower hinge is fixedly installed below the lower portion of the one side of the door frame and has a fitting groove toward the door. A lower fixing plate formed; A door check part inserted into a lower portion of the door facing the lower fixing plate and fitted into a fitting groove of the upper fixing plate, wherein the door check part comprises: a main body installed in a thickness direction of the door; A shaft gear embedded in the main body and axially supported by the fixed shaft, the shaft gear protruding below the main body, the fixed shaft being internal and having a fitting shaft fitted into the fitting groove of the lower fixing plate; A rotary gear embedded in the main body, the gear teeth being formed at one side to be engaged with the shaft gear, and the protrusions being formed at the side opposite to the side where the gear teeth are formed; A stop gear embedded in a main body of the side of the rotary gear in which the gear teeth are formed and engaged with the gear teeth of the rotary gear to pause the rotary gear; And a hydraulic cylinder embedded in the main body, the hydraulic cylinder having a cylinder rod for automatically closing the open door by pushing the protrusion with a predetermined force.

Description

Pivot-hinge for door

The present invention relates to a pivot hinge for a door, and more particularly, to a pivot hinge for a door having a door check to stop or automatically close the open door at a predetermined angle.

The pivot hinge for the door is a means for fixing one axis of the door, such as an iron door and a fire door, to the door frame to open and close the door. If necessary, an automatic closing device such as a door closer that automatically closes the open door may be installed on the door, and a fixture may be provided at the bottom of the door to open the door at an angle for ventilation purposes. You can also install. Of course, both have doors installed.

That is, in the related art, in order to automatically close the door or maintain the opened state, the automatic closing device and the stator as described above must be separately installed. Since the self-closing device and the fixing stand protrude out of the door, it may not look good and may cause a safety accident in which the person who enters the door falls over the fixing stand. And since the fixed stand is operated by foot, there is a problem with high failure rate.

On the other hand, a pivot hinge that solves such a problem is disclosed, for example, in Korea Patent Publication No. 118391 (1999.01.11). That is, the automatic closing device and the stopper device are installed together in the pivot hinge. By the way, the automatic closing device to close the door using the elastic force of the spring, if the door is released after opening the door at a predetermined angle, because the door is initially rotated quickly by the elastic force of the spring, the door hit the door frame and hit the door Alternatively, the door frame may be damaged and a safety accident may occur. In addition, since the stopper is coupled to the stopper device to stop the door, the door cannot be stopped except where the stopper device is installed.

Accordingly, it is an object of the present invention to provide a pivot hinge for a door to stop or automatically close an open door at a predetermined angle.

1 is a view showing a state in which the pivot hinge for the door is installed in the door frame according to an embodiment of the present invention,

Figure 2 is a perspective view showing a door check of the door pivot hinge according to an embodiment of the present invention,

3 is a plan view showing a state in which the door check unit of FIG.

Figure 4 is an operating state diagram of the lower hinge including the door check of Figure 2, an operating state diagram showing a state in which the open door is automatically closed,

FIG. 5 is an operation state diagram of the lower hinge including the door check unit of FIG. 2, and FIG.

6 is an operating state diagram of the lower hinge including the door check of Figure 2, an operating state diagram showing a state in which the fixed door is closed again,

Figure 7 is a plan view showing a door check of the door pivot hinge according to another embodiment of the present invention.

Description of the main parts of the drawing

10: upper hinge 12: upper fixing plate

14: rotating plate 20: lower hinge

22: lower fixing plate 24: door check

30: body 40: shaft gear

50: rotation gear 60: stop gear

70: hydraulic cylinder 80: adjustment bolt

92: door frame 94: door

100: pivot hinge for door

In order to achieve the above object, a pivot hinge for the door to be opened and closed by fixing one side of the door to the door frame, the upper hinge is installed on the upper side of one side of the door frame and the corresponding door; And a lower hinge installed at one lower portion of the door frame corresponding to the upper hinge and a lower portion of an entrance door corresponding thereto.

The lower hinge is fixed to the lower portion of the lower side of the door frame, the lower fixing plate formed with a fitting groove toward the door; And a door check part inserted into and installed at a lower portion of the door facing the lower fixing plate and fitted into a fitting groove of the upper fixing plate.

The door check unit,

A main body installed in the thickness direction of the door; A shaft gear embedded in the main body and axially supported by the fixed shaft, the shaft gear protruding below the main body, the fixed shaft being internal and having a fitting shaft fitted into the fitting groove of the lower fixing plate; A rotary gear embedded in the main body, the gear teeth being formed at one side to be engaged with the shaft gear, and the protrusions being formed at the side opposite to the side where the gear teeth are formed; A stop gear embedded in a main body of the side of the rotary gear in which the gear teeth are formed and engaged with the gear teeth of the rotary gear to pause the rotary gear; And a hydraulic cylinder embedded in the main body, the hydraulic cylinder having a cylinder rod for automatically closing the open door by pushing the protrusion with a predetermined force.

In the door pivot hinge according to the present invention, a ball bearing is installed at the end of the cylinder rod in contact with the projection of the rotary gear, the projection of the rotary gear and the end of the cylinder rod is connected by a spring.

The diameter of the rotary gear according to the present invention is larger than the diameter of the shaft gear. It further includes an adjustment bolt fastened through the body opposite the projection of the rotary gear in contact with the cylinder rod.

The pivot pivot for the door according to the present invention, the central portion is inserted into the rotation shaft of the stop gear, one side connected to the central portion is caught on the inner surface of the main body, and the other side connected to the central portion and the spring fastened to the hole formed in the stop gear ; An adjustment lever configured to move the stop gear toward the rotary gear, one side of which is coupled to a rotating shaft of the stop gear, the control lever configured to protrude out of the main body, and an insertion part connected to the control part and inserted into an insertion hole formed in the stop gear; It includes more. In particular, when the stopper is turned to rotate toward the rotary gear, the spring is compressed and the stop gear is engaged with the rotary gear to stop the door. If the door is rotated slightly, the spring is released and the stop gear moves to its original position. And the door is closed.

And, the pivot pivot for the door according to the present invention, the central portion is inserted into the rotation shaft of the stop gear, one side connected to the central portion is caught on the inner surface of the main body, the other side connected to the central portion is fastened to the hole formed in the stop gear Springs; An adjustment lever for moving the stop gear toward the rotary gear, comprising an adjustment lever exposed on the side of the main body, and an adjustment lever composed of a spring wire connecting the adjustment part and the stop gear, and adjusting the stop gear to rotate toward the rotation gear. When the part is pulled, the spring is compressed and the stop gear is engaged with the rotary gear to stop the door, and when the door is rotated slightly, the spring is released and the stop gear moves to the original position and the door is closed.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 is a view showing a state in which the pivot hinge 100 for the door according to an embodiment of the present invention is installed in the door frame 92. 2 is a perspective view showing the door check part 24 of the door pivot hinge according to the embodiment of the present invention. 3 is a plan view illustrating a state in which the door check part 24 of FIG. 2 is installed below the door 94.

1 to 3, the door 94 is installed to open and close at one side of the door frame 92 by the pivot hinge 100 for the door. The pivot hinge 100 includes an upper hinge 10 installed at an upper portion of one side of the door frame 92 and an upper portion of the door 94 corresponding thereto, and a lower portion of one side of the door frame 92 and a lower portion of the door 94 corresponding thereto. Consists of a lower hinge 20 installed in. Thus, the door 94 is opened and closed with the upper hinge 10 and the lower hinge 20 in the door frame 92.

The upper hinge 10 is fixed to the upper side of the door frame 92, is installed on the upper fixing plate 12 and the upper fixing plate 12, the upper fixing plate 12 facing the upper fixing plate 12 is formed in the downward direction, the upper fixing plate It is composed of a pivot plate (14) is inserted into the axial hole of the (12) is pivoted to enable the rotational movement of the door (94).

The lower hinge 20 is fixedly installed on the lower side of the door frame 92, and installed in the lower fixing plate 22 having a fitting groove formed toward the door 94 and the lower side of the door 94 facing the lower fixing plate 22. And, it includes a door check unit 24 is fitted to the fitting groove of the lower fixing plate. Particularly, the door check part 24 according to the present invention basically serves as a pivot hinge installed under the door 94 so that the door 94 opened at a predetermined angle can be automatically closed. The door 94 opened at an angle may be fixed so as not to close.

The door check part 24 will be described in more detail. The door check part 24 includes a main body 30 installed in the thickness direction of the door 94, a shaft gear 40 embedded in the main body 30, and rotation. Gear 50, stop gear 60 and hydraulic cylinder 70.

The shaft gear 40 is supported by the fixed shaft 41, the fitting shaft 42 of the shaft gear protruding below the main body 30 is fitted and fixed to the fitting groove of the lower fixing plate. Thus, the door 94 rotates the shaft gear 40 and the pivot 13 of the upper hinge to the shaft, the shaft gear 40 does not rotate. At this time, the fitting shaft 42 of the shaft gear serves as a pivot corresponding to the pivot of the upper hinge.

The rotary gear 50 is supported by the rotary shaft 51, the gear teeth 52 are formed in the direction facing the shaft gear 40 so as to be engaged with the shaft gear 40, the gear teeth 52 The protrusion 53 is formed on the opposite side to which the side is formed.

On the other hand, since the door 94 is typically rotated and opened up to 90 degrees to 180 degrees around the shaft gear 40, by reducing the rotation angle of the rotary gear 50 meshed with the shaft gear 40 of the projection 53 In order to reduce the rotation distance, the diameter of the rotary gear 50 is formed larger than the diameter of the shaft gear 40. At this time, the rotation angle of the rotary gear 50 can be adjusted by adjusting the gear ratio of the rotary gear 50 and the shaft gear 40.

The hydraulic cylinder 70 includes a cylinder body 71 and a cylinder rod 72 which protrudes from the cylinder body 71 and is in mechanical contact with the protrusion 53, wherein the cylinder rod 72 is a protrusion 53. Push to a predetermined force to automatically close the open door 94. At this time, in order to prevent damage due to mechanical contact between the cylinder rod 72 and the protrusion 53, a ball bearing 73 is installed at the end of the cylinder rod 72, the cylinder in the process of opening and closing the door 94 In order to prevent the rod 72 and the protrusion 53 from moving together to prevent the cylinder rod 72 from escaping from the protrusion 53, the ends of the cylinder rod 72 and the protrusion 53 are connected by a spring 74. have.

The stop gear 60 is a means for stopping the door 94 opened at a predetermined angle in the state, and is incorporated in the main body 30 on which the gear teeth 52 of the rotary gear are formed, and the gear of the rotary gear. The rotary gear 50 is paused in engagement with the teeth 52. After the spring 62 is inserted into the rotation shaft 61 of the stop gear, one end is caught by the inner surface of the main body 30 and the other is connected to the fitting hole 63 formed in the stop gear 60. The adjustment lever 64 for adjusting the stop gear 60 is exposed to one side of the door 94. One side of the adjustment lever 64 is coupled to the rotary shaft 61 of the stop gear and protrudes out of the main body 30, and a fitting hole connected to the adjuster 65 and formed in the stop gear 60 ( And an insertion portion 67 inserted into the 66.

Therefore, when the adjustment part 65 of the adjustment lever is rotated so that the stop gear 60 rotates toward the rotation gear 50, the stop gear 60 meshes with the rotation gear 50 to temporarily stop the rotation gear 50 to enter the door. 94 is stopped at a predetermined angle. At this time, since the spring 62 is compressed, when the stop gear 60 is released from the rotary gear 50, the spring 62 is released and the stop gear 50 is restored to its original position and the door 94 is It will close automatically.

In order to prevent the cylinder rod 72 from pushing the protrusion 53 of the rotary gear to minimize the load on the rotary gear 50 and to prevent the rotary gear 50 from rotating more than necessary, the cylinder rod 72 is contacted. The adjustment bolt 80 is fastened through the main body 30 to the opposite side of the projection 53 of the rotating gear. In addition, the adjustment bolt 80 is installed after the door check unit 24 according to the present invention in the lower portion of the door 94, the shaft (42) of the shaft gear is stable to the fitting groove 21 of the lower fixing plate. To be inserted. That is, since the fitting shaft 42 is fixed in the state in which the adjustment bolt 80 is completely fastened, the deviation between the fitting shaft 42 and the fitting groove 21 is small, so that the fitting shaft 42 is fitted into the fitting groove 42. Cannot be inserted directly into). Therefore, when the adjusting bolt 80 is loosened, the cylinder rod 72 pushes the protrusion 53 further, so that a gap is generated between the shaft gear 40 and the rotary gear 50, so that the fitting shaft 42 is fitted. It can be easily fitted into the groove 21.

Then, after the shaft gear 40, the rotary gear 50, the stop gear 60, the hydraulic cylinder 70, etc. are installed in the main body 30, the cover 32 is sealed with the main body 30, and the main body 30 and The bush is interposed to suppress mechanical friction between the inner surface of the lid 32 and the shaft gear 40 and the rotary gear 50.

Referring to FIG. 4, a state in which the door 94 opened at a predetermined angle is automatically closed will be described. The cylinder rod 72 pushes the protrusion 53 with a predetermined force to maintain the door 94 in a closed state. When the door 94 is pushed with a predetermined force and opened at a predetermined angle, the rotary gear 50 is engaged with the shaft gear 40 to rotate so that the protrusion 53 of the rotary gear moves the cylinder rod 72 to the cylinder body ( 71). When the force that pushes the door 94 with a predetermined force is removed, the cylinder rod 72, which has entered the cylinder body 71, is pushed out and the protrusions 53 are pushed to their original positions. To close automatically. That is, the force pushing the door 94 is accumulated in the hydraulic cylinder 70, and the door 94 is automatically closed again by the accumulated force. In addition, the entrance and exit door 94 may be smoothly closed by adjusting the speed of entering and exiting the cylinder rod 72 of the hydraulic cylinder, and the adjustment of the speed of closing the door 94 by the cylinder rod 72 of the hydraulic cylinder may be adjusted. Detailed description is omitted because it is a technique well known to those skilled in the art.

Next, a state in which the door 94 is opened at a predetermined angle will be described with reference to FIG. 5. In the state where the door 94 is opened at a predetermined angle, the adjustment lever 64 is rotated to rotate the stop gear 60. The door 94 is stopped by engaging the gear 50 to prevent rotation of the rotary gear 50. At this time, when the stop gear 60 is engaged with the rotary gear 50 to rotate, the spring 62 connected to the stop gear 60 is compressed.

Next, referring to FIG. 6, the operation relationship in which the door 94 fixed at a predetermined angle closes again will be described. When the door 94 is rotated a little more, the engaged state of the rotary gear 50 and the stop gear 60 is achieved. As it is released, the rotary gear 60 returns to its original position as the compressed spring 62 is released, and the door 94 is automatically closed by the hydraulic cylinder 70.

7 is a perspective view illustrating the door check part 124 of the door pivot hinge according to another embodiment of the present invention. Referring to FIG. 7, a gear blade 154 is formed on the projection 153 of the rotary gear, and the cylinder rod 172 having the gear blade 173 formed to correspond to the gear blade 154 is engaged and stops. Except that the control lever 164 for adjusting the gear 160 is exposed to the side of the main body has the same configuration as the door check unit 24 shown in FIG. The adjustment lever 164 is composed of an adjustment unit 165 exposed on the side of the body 130, a spring wire 167 connecting the adjustment unit 165 and the stop gear 160, the spring wire 167 One end of is fastened to the hole 166 away from the rotation shaft 161 of the stop gear. Accordingly, when the adjustment unit 165 is pulled, the stop gear 160 is engaged with the rotation gear 150 to prevent rotation of the rotation gear 150. When the adjustment unit 165 is released, the spring wire 167 is extended. As the contraction, the control unit 165 is restored to its original position. At this time, the adjusting unit 165 is formed on the side of the main body 130 that can be exposed to one side of the door.

On the other hand, embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to aid understanding, and are not intended to limit the scope of the present invention. It is apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

Therefore, according to the structure of the present invention, the door check unit can automatically close the door that is opened at a predetermined angle or stop the door that is opened at a predetermined angle in addition to the function as a conventional pivot hinge.

Claims (6)

As a pivot hinge for the door that can be opened and closed by fixing one side of the door to the door frame, An upper hinge installed at an upper portion of one side of the door frame and an upper portion of an entrance door corresponding thereto; And a lower hinge installed at one lower portion of the door frame corresponding to the upper hinge and a lower portion of an entrance door corresponding thereto. The lower hinge, A lower fixing plate fixedly installed below one side of the door frame and having a fitting groove toward the door; And a door check part inserted into and installed at a lower portion of the door facing the lower fixing plate and fitted into a fitting groove of the upper fixing plate. The door check unit, A main body installed in the thickness direction of the door; A shaft gear embedded in the main body and axially supported by the fixed shaft, the shaft gear protruding below the main body, the fixed shaft being internal and having a fitting shaft fitted into the fitting groove of the lower fixing plate; A rotary gear embedded in the main body, the gear teeth being formed at one side to be engaged with the shaft gear, and the protrusions being formed at the side opposite to the side where the gear teeth are formed; A stop gear embedded in a main body of the side of the rotary gear in which the gear teeth are formed and engaged with the gear teeth of the rotary gear to pause the rotary gear; And a hydraulic cylinder embedded in the main body, the hydraulic cylinder having a cylinder rod that automatically closes the open door by pushing the protrusion with a predetermined force. 2. The pivot hinge for a door according to claim 1, wherein a ball bearing is installed at the end of the cylinder rod in contact with the protrusion of the rotary gear, and the protrusion of the rotary gear and the end of the cylinder rod are connected by a spring. The pivot hinge for the door according to claim 1, wherein the diameter of the rotary gear is larger than the diameter of the shaft gear. 2. The pivot hinge for a door according to claim 1, further comprising an adjustment bolt fastened through the main body opposite to the projection of the rotary gear in contact with the cylinder rod. According to claim 1, wherein the central portion is inserted into the rotation shaft of the stop gear, one side connected to the central portion is caught on the inner surface of the main body, the other side connected to the middle core portion and the spring fastened to the hole formed in the stop gear; ; An adjustment lever for moving the stop gear toward the rotary gear, one side of which is coupled to a rotation shaft of the stop gear and protrudes out of the main body, and an insertion inserted into a fitting hole formed in the stop gear and connected to the control part; Further comprising a control lever consisting of; When the stopper is turned to rotate toward the rotary gear, the spring is compressed while the stop gear is engaged with the rotary gear to stop the door, and when the door is slightly rotated, the spring is released and the And the stop gear moves to its original position and the door is closed. According to claim 1, wherein the central portion is inserted into the rotation shaft of the stop gear, one side connected to the central portion is caught on the inner surface of the main body, the other side connected to the middle core portion and the spring fastened to the hole formed in the stop gear; ; A control lever for moving the stop gear toward the rotary gear, the control lever being exposed to a side surface of the main body, and a control lever composed of a spring wire connecting the control unit and the stop gear; When the stopper is pulled to adjust the rotating gear toward the rotary gear, the spring is compressed while the stop gear is engaged with the rotary gear to stop the door, and when the door is slightly rotated, the spring is released and the And the stop gear moves to its original position and the door is closed.