KR100789228B1 - Hinge Device for Door - Google Patents

Abstract

The present invention relates to a hinge device and a closed door of the door, the technical problem to be solved is to keep the door open and closed state securely at a predetermined position, and also to prevent the door opening by external force when the door is closed. Of course, to provide a door hinge device and a sealed door that is easy to assemble.

To this end, the gist of the solution according to the present invention is a rotation center member fixed to the door frame to become a rotation center axis of the door, a cam member coupled to the rotation center member and rotating together with the door, and the rotation center member At least one door guide member sliding to the cam member to adjust the opening and closing speed of the door, and maintaining a rotation angle of the door, and a door connecting member coupled to the door simultaneously with the cam member. A hinge device for a door is disclosed.

Door, hinge, cam, ball, sliding

Description

Hinge Device for Door

1 is a partial cross-sectional view showing a door hinge device according to an embodiment of the present invention.

2A and 2B are sectional views and a perspective view of the cam member of the hinge device of the door shown in FIG.

3 is a perspective view showing a door hinge device according to another embodiment of the present invention.

4A and 4B are longitudinal and cross-sectional views of FIG. 3.

Figure 5 is a cross-sectional view showing a door hinge device according to another embodiment of the present invention.

Figure 6 is a cross-sectional view showing a closed door according to an embodiment of the present invention.

7 is a cross-sectional view showing a closed door according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100; Door hinge device according to an embodiment of the present invention

110; Rotation center member 111; Door frame bracket

112; Central axis 113; spring

114; Spring seating die 115; Tapered bearing

116; Ball bearing 120; Cam member

121 to 126: first to sixth curved surfaces 130; Door guide member

131; Ball 132; Ball seating die

140; Door connecting member 141; Inner cover for door connection

142; Outer cover for door connection

200; Door hinge device according to another embodiment of the present invention

210; Rotation center member 211; Door frame bracket

212; Central axis 213; Ball bearing

220; Rotary die 221; Inner rotary die

222; Outer rotary die 230; key

240; Door connecting member 241; Opening

250; door

300; Door hinge device according to another embodiment of the present invention

310; Rotation center member 320; Friction member

330; Elastic member 340; Door connection member

410; Door frame 411; 1st step

412; Second step 413; Close contact

420; Hinge 421; Jamming

430; Sealed door 431; Extension protrusion

432; Contact member 433; Jamming groove

510; Hinge 511; Home

512; Auxiliary locking groove 513; key

520; Sealed door 521; Jamming

523; Wooden door (or metal door) 524; Fixing member

530; doorframe

The present invention relates to a hinge device and a closed door of the door, and in more detail, to maintain the door open and closed state at a predetermined position reliably, and also to prevent the door opening by external force when the door is closed, as well as assembly This is a hinge device of a simple door and a sealed door.

In general, most buildings are equipped with doors that can be sealed and opened, so that heating and cooling are properly maintained and intrusion from the outside is prevented. Such a door is normally coupled to a hinge mounted at a predetermined position of the door frame so that the door is opened at a predetermined angle or completely closed.

On the other hand, such a door needs to be kept securely in its closed position as well as in a predetermined angle open state. That is, when the door is closed, it should be kept tightly sealed and soundproof, and when the door is open, it should not be easily closed by wind or other small external force.

To this end, conventional doors are usually equipped with a manual door closing stop device that can be in contact with and separated from the ground at the bottom of the door, or a hydraulic automatic door opening and closing device.

However, the door closing stop device installed in the lower part of the door has to be folded and unfolded by the user one by one, there is a problem inconvenient in use, and the hydraulic automatic door opening and closing device is not only expensive but also has a very difficult installation work. Moreover, the hydraulic automatic door opening and closing device has a problem that as the use time increases, the oil inside may be discharged to the outside or a breakdown may easily occur.

In addition, the doors described above need not be opened not only for reliable sealing but also for external illegal damage. However, in a conventional door, the door locking device is often released by an external force such as a steel rod or a card having a predetermined length from the outside. For example, a steel rod may be inserted between the door and the door frame from the outside, so that the sealed state of the door may be illegally released by the steel rod.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to ensure the opening and closing state of the door reliably at a predetermined position as well as to open and close the door automatically by a small force There is provided a hinge device for a door.

In addition, another object of the present invention is to provide a hinge device for a door that can be completed at a low cost and in an easy way.

In addition, another object of the present invention relates to a sealed door that can prevent the illegal opening of the door by the external force with a sure door closing, and can complete the installation work in an easy way.

Hinge device for a door according to an embodiment of the present invention to achieve the above object is a rotation center member which is fixed to the door frame to become a rotation center axis of the door, and coupled to the rotation center member at the same time the rotary motion At least one door guide member coupled to the rotation center member and sliding to the cam member to adjust the opening and closing speed of the door and maintaining the rotation angle of the door; It may include a door connection member coupled to the door at the same time.

Here, the rotation center member is coupled to the door frame bracket fixed to the door frame, the door frame bracket, at the same time extending a predetermined length in one direction, and coupled to the central axis at the same time, pushing the door guide member to one side And a spring seating die coupled to an end of the central shaft to prevent detachment of the spring.

In addition, a tapered bearing may be further coupled to the central axis between the door frame bracket and the cam member.

In addition, a ball bearing may be further coupled to a central axis between the spring seating die and the door connection member.

In addition, the cam member may be further sliding with the door guide member and a curved surface having a predetermined curvature may be further formed.

Here, the curved surface of the cam member may be formed to be slid along the surface of the door guide member and at the same time sliding stop at 0 °, 90 °, 180 ° or 0 °, -90 °, -180 °.

In addition, the curved surface of the cam member may be formed to slide along the surface of the door guide member and the sliding speed is lowered at a predetermined position.

The curved surface of the cam member may include a first curved surface on which the door guide member is slid and stopped, a second curved surface formed to be inclined at a predetermined angle from the first curved surface, and the door guide member is slid, and a predetermined length from the second curved surface. A third curved surface which is formed to be flat and the door guide member is slid slowly for a predetermined time, a fourth curved surface which is formed to be inclined at a predetermined angle from the third curved surface, and the door guide member is slid, and a predetermined length is flat from the fourth curved surface And a fifth curved surface which is formed to be inclined at a predetermined angle from the fifth curved surface to stop the door guide member, and a sixth curved surface to which the door guide member slides.

The door guide member may include at least one ball slidably mounted to the cam member, and a ball seat die coupled to the rotation center member while the ball is seated.

In addition, the door connection member is coupled to the cam member, and the door connection inner cover in which the door guide member is embedded, and the door connection outer cover which surrounds the door connection inner cover and the door is coupled to one side. It may include.

As described above, the door hinge device according to the embodiment of the present invention has an effect of properly adjusting the opening and closing speed of the door by sliding the cam member and the door guide member. In addition, in the present invention as described above, when the door is initially rotated with a small force, the door automatically rotates the remaining sections, thereby facilitating the use of the door. Moreover, the present invention also has the effect that the use of the door is made convenient by reliably stopping the door at a predetermined angle (sealing angle or opening angle).

In addition, the door hinge device according to another embodiment of the present invention in order to achieve the above object is a rotation center member which is fixed to the door frame to become a rotation center axis of the door, and coupled to the rotation center member at the same time rotates with the door It may include a rotating die for movement, a key for bringing the rotating die into close contact with the rotating center member, and a door connecting member coupled to the outer periphery of the rotating die and coupled to the door.

Here, the rotation center member may include a door frame bracket fixed to the door frame, a center axis coupled to the door frame bracket, a predetermined length extending in one direction, and a ball bearing coupled to the center axis.

In addition, the rotary die is coupled to the outer periphery of the ball bearing, and at the same time coupled to the outer periphery of the inner rotation die and the inner rotation die in close contact with the door frame bracket by the central axis of the door connecting member It may include an outer rotary die located inside.

In addition, the key may be coupled between the inner rotary die and the outer rotary die, such that the inner rotary die is in close contact with the bracket on the outer rotary die.

In addition, an opening may be further formed in the door connection member such that the rotation die and the key are easily coupled to the door connection member.

As described above, the door hinge device according to another embodiment of the present invention has an advantage in that the rotating die can be easily installed on the rotation center member and the door connection member, thereby making the door mounting work convenient. In addition, after the door is mounted on the rotating center member and the rotating die, by simply installing a key, disassembly between the rotating center member, the rotating die, and the door connecting member can be prevented.

In addition, the door hinge device according to another embodiment of the present invention in order to achieve the above object is coupled to the rotation center member and the outer circumference of the rotation center member is fixed to the door frame to be the rotation center of the door, the door A friction member coupled to the opening member so as to slow down the opening, an elastic member surrounding the outer circumference of the friction member, the elastic member closely contacting the rotational center member direction, and the outer member surrounding the outer circumference of the elastic member, It may include a door connecting member is coupled.

Here, the friction member may be any one selected from rubber, urethane or synthetic resin.

In addition, the elastic member may be any one selected from a leaf spring or a coil spring.

In addition, the door connecting member surrounds the elastic member in a circular shape, the door may be coupled to one side.

As described above, the door hinge device according to another embodiment of the present invention is coupled to the outer periphery of the rotation center member so that the friction member and the elastic member can be slowed down when the door is opened or closed. Therefore, it is possible to reduce the risk of finger pinching or other safety accidents in the door.

In order to achieve the above object, a closed door according to the present invention includes a door frame having a predetermined space, a hinge fixed to one side of the door frame, and a closed door fixed to the hinge to seal the door frame, An extension protrusion of a predetermined length may be formed at an end of the closed door in the opposite direction, and an extension member may be formed at the extension protrusion, and a two-step step may be formed at the door frame in which the contact member and the end of the door contact each other.

The second step of the door frame may include a first step of contacting the contact member of the closed door and a second step of contact of the end of the door.

In addition, the second step may have an opening having a predetermined depth, and the contact member may be further formed inside the opening to contact the end of the closed door.

In addition, the contact member may be any one selected from rubber pads or fleece.

In addition, the hinge may be formed with a locking projection spaced apart a predetermined distance along the longitudinal direction, the locking door may be formed with a locking groove spaced a predetermined distance along the longitudinal direction to be coupled to the locking projection of the hinge. .

In this way, in the sealed door according to the present invention, the two-stage step is formed in the door frame, whereby the adhesion between the sealed door and the door frame is further improved. In addition, even if a steel rod or other tool is forcibly inserted between the door frame and the door gap, and external force is applied, the two-step structure does not completely insert the steel rod into the house, thereby preventing illegal opening of the door. have. In addition, by forming the locking projection on the hinge and the locking groove on the closed door, the operation of coupling the closed door to the hinge becomes very easy.

In order to achieve the above object, another closed door of the present invention includes a hinge fixed to the door frame and a closed door fixed to the hinge, and at the same time both sides of the hinge are formed with locking grooves, the closed door The locking protrusion may be formed to be coupled to the locking groove of the hinge.

Here, the closed door may be any one selected from a wooden door or a metal door.

In addition, the sealing door may be fixed to the locking projection with a fixing member.

In addition, an auxiliary locking groove spaced a predetermined distance may be further formed inside the locking groove of the hinge, and a key may be further coupled between the auxiliary locking grooves.

In this way, the other closed door of the present invention can be easily coupled to the hinge by the structure of the locking groove and the locking projection. In addition, an auxiliary locking groove is further formed inside the locking groove of the hinge, and a key is coupled to the auxiliary locking groove so that the locking groove structure of the hinge is not damaged.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a partial cross-sectional view showing a hinge device 100 of a door according to an embodiment of the present invention. 2A and 2B are sectional views and perspective views of the cam member 120 of the hinge device 100 of the door shown in FIG. 1.

As shown, the hinge device 100 of the door according to the embodiment of the present invention includes a rotation center member 110, a cam member 120, a door guide member 130, and a door connection member 140. Include.

The rotation center member 110 is fixed to the door frame to become a rotation center axis of the door. The rotation center member 110 includes a door frame bracket 111, a central axis 112, a spring 113, and a spring seating die 114. The door frame bracket 111 is fixed to one side of the door frame. In addition, the central shaft 112 is coupled to the door frame bracket 111, and extends a predetermined length in one direction (lower direction in the drawing). The spring 113 is coupled to the central shaft 112, and is installed to push the door guide member 130 to one side (the upper direction in the drawing). The spring seating die 114 is coupled to the end of the central shaft 112, and serves to prevent the departure of the spring 113. Here, the tapered bearing 115 is further coupled to the central axis 112 between the door frame bracket 111 and the cam member 120 so that the hinge device 100 according to the present invention is not damaged by the load of the door. Of course, it allows the door to rotate. In addition, the ball bearing 116 is further coupled to the central axis 112 between the spring seating die 114 and the door connecting member 140, so that the door connecting member 140 is easily rotated.

The cam member 120 is coupled to the rotation center member 110 and at the same time rotates with the door. The cam member 120 is further provided with a curved surface of a predetermined curvature so as to slide on the door guide member 130. The curved surface of the cam member 120 is slid in the 0 °, 90 °, 180 ° or 0 °, -90 °, -180 ° directions while being in contact with the door guide member 130, and at the respective angles. It is formed so that it can be stopped. In addition, the curved surface of the cam member 120 may be formed to slide relatively slowly at a predetermined angle when sliding. In this way, the safety of the door is improved by preventing sudden closure of the door. More specifically, the curved surface of the cam member 120 includes first to sixth curved surfaces 121 to 126. The first curved surface 121 is where the door guide member 130 is slid. For example, it is possible that the door is sealed (0 °). The second curved surface 122 is formed to be inclined at a predetermined angle from the first curved surface 121, where the door guide member 130 slides. The third curved surface 123 is formed to be flat in a predetermined length from the second curved surface 122 so that the door guide member 130 slides relatively slowly for a predetermined time. For example, the third curved surface 123 may be formed such that the opening angle (or sealing angle) of the door corresponds to approximately ± 1 to ± 45 °. Therefore, the door is closed at a relatively small speed at the angle. The fourth curved surface 124 is formed to be inclined at a predetermined angle from the third curved surface 123 so that the door guide member 130 slides. The fifth curved surface 125 is formed to be flat in a predetermined length from the fourth curved surface 124, where the door guide member 130 is stopped. For example, the fifth curved surface 125 may be in a state in which the door is opened approximately ± 90 °. In addition, the sixth curved surface 126 is formed to be inclined at a predetermined angle from the fifth curved surface 125 and the door guide member 130 slides. The first to fifth curved surfaces 121 to 125 may be formed at approximately ± 90 °, and the first to fifth curved surfaces 121 to 125 may be repeated four times in a 360 ° range.

The door guide member 130 is coupled to the rotation center member 110 and at the same time sliding to the cam member 120 to control the opening and closing speed of the door, and serves to maintain the rotation angle of the door. More specifically, the door guide member 130 includes at least one ball 131 and a ball seating die 132. The ball 131 is slidably mounted to the cam member 120. In addition, the ball seating die 132 is coupled to the rotation center member 110 at the same time the ball 131 is seated. Moreover, since the ball seating die 132 is always urged upward by the above-mentioned spring 113, the rotation of the door when the ball 131 is located on a predetermined curved surface of the cam member 120 The state (closed or open) is not easily changed by small external forces such as wind. That is, the closed position or the open position of the door is reliably maintained by the spring 113.

The door connecting member 140 is coupled to the cam member 120 at the same time coupled to the door. The door connection member 140 includes an inner cover 141 for door connection and an outer cover 142 for door connection. The door connecting inner cover 141 is coupled to the cam member 120, and the door guide member 130 is embedded therein. In addition, the door connection outer cover 142 surrounds the door connection inner cover 141 and the door is coupled to one side.

In this manner, in the present invention, the door connecting outer cover 142, the door connecting inner cover 141, and the cam member 120 rotate together. Of course, the rotation center member 110 and the door guide member 130 is fixed without being rotated at a predetermined position. Therefore, in the present invention, the cam member 120 and the door guide member 130 are mutually slid, whereby the opening and closing speeds of the doors are appropriately adjusted. In addition, according to the present invention, when the door is initially rotated with a small force, the door automatically rotates the remaining sections, thereby facilitating the use of the door. Moreover, the present invention facilitates the use of the door by reliably stopping the door at a predetermined angle (sealing angle or opening angle).

3 is a perspective view of the door hinge device 200 according to another embodiment of the present invention. 4A and 4B are longitudinal and cross-sectional views of FIG. 3.

As illustrated, the door hinge device 200 according to another embodiment of the present invention includes a rotation center member 210, a rotation die 220, a key 230, and a door connection member 240. .

The rotation center member 210 is fixed to the door frame serves as a rotation center axis of the door. To this end, the rotation center member 210 may include a door frame bracket 211, a central axis 212, and a ball bearing 213. The door frame bracket 211 is fixed to the door frame. In addition, the central shaft 212 is bolted to the door frame bracket 211, and at the same time extends a predetermined length in one direction (lower direction in the drawing). For example, a conventional bolt may be used as the central axis 212, but the type of the central axis 212 is not limited thereto. The ball bearing 213 is coupled to an approximately lower region of the central axis 212. Here, the door frame bracket 211 and the central axis 212 as described above is always fixed regardless of the closing and opening of the door, the ball bearing 213 is to rotate.

The rotary die 220 is coupled to the rotation center member 210 and at the same time serves to rotate with the door. This rotary die 220 largely includes an inner rotary die 221 and an outer rotary die 222. The inner rotary die 221 is coupled to the outer periphery of the central axis 212 and the ball bearing 213 and at the same time is in close contact with the door frame bracket 211 by the key 230 to be described. Of course, such an internal rotary die 221 rotates while contacting the ball bearing 213 when the door is closed and opened. The outer rotary die 222 is coupled to the outer periphery of the inner rotary die 221 and is located inside the door connection member 240.

The key 230 serves to closely contact the rotation die 220 in the direction of the rotation center member 210, more specifically in the direction of the door frame bracket 211. To this end, the key 230 is coupled to a predetermined gap 231 between the inner rotating die 221 and the outer rotating die 222, so that the inner rotating die 221 on the outer rotating die 222, the door frame bracket To be in close contact with the direction (211).

The door connecting member 240 is coupled to the outer periphery of the rotary die 220 and at the same time coupled to the door 250. Of course, the door connecting member 240 rotates in a predetermined direction together with the door 250. Furthermore, the opening 241 having a predetermined size is further formed in the door connecting member 240 so that the rotary die 220 and the key 230 are easily coupled to the door connecting member 240.

Referring to the assembly method for the hinge device 200 of the door having such a structure as follows.

First, the rotation center member 210 is installed in the door frame. That is, the door frame bracket 211 is installed in the door frame, and the center shaft 212 coupled with the ball bearing 213 is coupled to the door frame bracket 211 together. Of course, after the door frame bracket 211 is first installed, the central shaft 212 having the ball bearing 213 may be coupled to the door frame bracket 211.

Subsequently, the door connection member 240 is coupled to the rotation center member 210. That is, the door connecting member 240 is coupled to the outer circumference of the central shaft 212 and the ball bearing 213 of the rotation center member 210.

Subsequently, the rotary die 220 is coupled to the outer circumference of the central shaft 212 and the ball bearing 213 through the opening 241 formed in the door connection member 240. In this manner, the rotary die 220 is rotatable at the outer circumference of the ball bearing 213 together with the door connecting member 240.

Finally, the key 230 is coupled to a gap 231 between the inner rotating die 221 and the outer rotating die 222 of the rotating die 220. As shown in FIG. 4A, the inner rotary die 221 protrudes higher than the central portion of the upper surface, and the outer rotary die 222 has an opposite shape so as to be paired with the inner rotary die 221. Interference can occur between them, so the inner rotation die 221 is lowered (the external abduction die 222 and the vertical height is large enough to accommodate the internal rotation die 221 so that the gap 231 is created. } The inner rotary die 221 is lifted from the outer rotary die 222 and then the key 230 is inserted into the gap 231 after the coupling between the protrusions so as not to interfere with the protrusions. The inner rotary die 221 and the outer rotary die 222 are integrated with each other so as to be integrated into the rotary die 220.

As described above, the door hinge device 200 according to another embodiment of the present invention can easily install the rotary die 220 on the rotation center member 210 and the door connection member 240, so that the door mounting operation is convenient. There is an advantage to being terminated. In addition, after the door is mounted on the rotating center member 210 and the rotating die 220, the key 230 is simply installed to thereby rotate the rotating center member 210, the rotating die 220, and the door connecting member 240. It is possible to prevent the decomposition phenomenon between.

5 is a cross-sectional view showing the hinge device 300 of the door according to another embodiment of the present invention.

As illustrated, the door hinge device 300 according to another embodiment of the present invention includes a rotation center member 310, a friction member 320, an elastic member 330, and a door connection member 340. do.

The rotation center member 310 is fixed to the door frame to become the rotation center axis of the door. Of course, the rotation center member 310 is a natural one is fixed to the door frame bracket not shown.

The friction member 320 is coupled to substantially wrap around the outer periphery of the rotation center member 310, and serves to slow the opening speed of the door. To this end, the friction member 320 may be any one selected from rubber, urethane, synthetic resin, or equivalent thereof having a predetermined friction force, but the material of the friction member 320 is not limited thereto.

The elastic member 330 is coupled to surround the outer periphery of the friction member 320, and serves to closely contact the friction member 320 in the direction of the rotation center member 310. To this end, the elastic member 330 may be any one selected from a leaf spring, a coil spring, or an equivalent thereof, but the type of the elastic member 330 is not limited thereto.

The door connecting member 340 surrounds the outer periphery of the elastic member 330 and the door is coupled to one side, thereby rotating the predetermined angle about the rotation center member 310 along with the door at a central axis. do.

Thus, in the door hinge device 300 according to another embodiment of the present invention, the friction member 320 is frictionally and closely adhered to the rotation center member 310 by a predetermined force when the door is opened or closed. Therefore, the speed of the door is slowed at the time of opening or closing the door, which in turn reduces the risk of finger pinching or other safety accidents.

6 is a cross-sectional view showing a closed door 430 according to an embodiment of the present invention.

As shown, the present invention includes a door frame 410, a hinge 420, and a closed door 430.

The door frame 410 has a predetermined space and is installed in various buildings such as ordinary houses, villas, apartments, and buildings.

The hinge 420 is fixed to one side of the door frame 410, it is natural that the hinge 420 can be adopted all the above-described hinge device (100, 200, 300).

The closed door 430 is coupled to a predetermined area of the hinge 420 and can be rotated by a predetermined angle.

Here, an extension protrusion 431 of a predetermined length is formed at the end of the closed door 430 opposite to the hinge 420. In addition, an inner side of the extension protrusion 431 is formed in close contact member 432 in close contact with the door frame 410. The contact member 432 may be a conventional rubber pad, fleece or equivalent thereof, and the type and material of the contact member 432 are not limited thereto.

In addition, the door frame 410 is formed with a two-stage step to improve the adhesion and prevent external intrusion. The second step may include a first step 411 in contact with the contact member 432 of the sealed door 430 and a second step 412 in contact with an end of the sealed door 430.

In addition, the second step 412 has an opening having a predetermined depth, and the contact member 413 in contact with the end of the closed door 430 is further formed inside the opening. Here, the contact member 413 may be a conventional rubber pad, a fleece, or an equivalent thereof, but the type and material of the contact member 413 are not limited thereto.

In addition, the hinge 420 is formed with a locking projection 421 spaced apart a predetermined distance along the longitudinal direction, the length of the closed door 430 to be coupled to the locking projection 421 of the hinge 420. A locking groove 433 is formed to be spaced apart a predetermined distance along the direction.

Thus, the closed door 430 according to the present invention can be coupled to the hinge 420 in a simple manner. Of course, since the two sealing members 413 and 432 are formed in the sealed door 430 according to the present invention, the adhesion to the door frame 410 is further improved, and the soundproofing effect is also improved. In addition, since the door frame 410 is provided with two-stage steps 411 and 412, it is possible to efficiently prevent intrusion due to illegal door damage from the outside.

7 is a cross-sectional view showing a closed door 520 according to another embodiment of the present invention.

As shown, another embodiment of the present invention includes a hinge 510 and a closed door 520.

The hinge 510 is, of course, fixed to the door frame 530. In addition, the closed door 520 is fixed to the hinge 510. The hinge 510 is a cylindrical body and the end of the door frame 530 is formed at the same distance from the axis of the hinge 510 so that the end of the door frame 530 always has a cylindrical outer circumference even when the hinge 510 is rotated at any angle. Close to.

Here, as the cylindrical normal surface of the hinge 510, engaging grooves 511 are formed on opposite sides of the outer circumferential portion thereof to form a P-shape as a whole, and the hinge 510 is provided on the closed door 520. The locking projection 521 is formed to be coupled to the locking groove 511 of the. Thus, the closed door 520 can be easily coupled to the hinge 510.

In addition, the sealed door 520 may be a wooden door or a metal door 523, but the present invention is not limited thereto. Of course, a locking protrusion 521 may be formed at one side of the wooden door or the metal door 523. In addition, the wooden door or metal door 523 is coupled to the locking projection 521 by a fixing member 524 such as a bolt.

Meanwhile, an auxiliary locking groove 512 spaced a predetermined distance is further formed inside the locking groove 511 of the hinge 510, and a key 513 is coupled between the auxiliary locking grooves 512. Therefore, the structure of the locking groove 511 of the hinge 510 is not easily destroyed by the structure in which the key 513 is coupled.

As described above, the door hinge device according to the embodiment of the present invention has an effect of properly adjusting the opening and closing speed of the door by sliding the cam member and the door guide member. In addition, in the present invention as described above, when the door is initially rotated with a small force, the door automatically rotates the remaining sections, thereby facilitating the use of the door. Moreover, the present invention also has the effect that the use of the door is made convenient by reliably stopping the door at a predetermined angle (sealing angle or opening angle).

In addition, the door hinge device according to another embodiment of the present invention can easily install the rotary die to the rotation center member and the door connecting member has an effect that the mounting operation of the door is convenient. In addition, after the door is attached to the rotating center member and the rotating die, by simply installing a key, there is an effect of preventing disassembly between the rotating center member, the rotating die, and the door connecting member.

In addition, the door hinge device according to another embodiment of the present invention is coupled to the outer periphery of the rotation center member by the friction member and the elastic member, there is an effect that can slow down the speed of the door when opening or closing the door. Therefore, there is an effect that can reduce the risk of fingers or other safety accidents in the door.

In addition, the closed door according to the present invention is formed by the two-stage step in the door frame, there is an effect that the adhesion between the closed door and the door frame is further improved. In addition, even if a steel rod or other tool is forcibly inserted between the door frame and the door gap, and external force is applied, the two-step structure does not completely insert the steel rod into the house, thereby preventing illegal opening of the door. It has an effect. In addition, by forming the locking projection on the hinge and the locking groove on the closed door, there is an effect that the operation of coupling the closed door to the hinge becomes very easy.

Finally, the other closed door of the present invention also has an effect that can be easily coupled to the hinge by the structure of the locking groove and the locking projection. Further, an auxiliary locking groove is further formed inside the locking groove of the hinge, and a key is coupled to the auxiliary locking groove, so that the locking groove structure of the hinge is not easily damaged.

What has been described above is only a few embodiments for implementing the door hinge device and the closed door according to the present invention, the present invention is not limited to the above-described embodiment, as claimed in the following claims Without departing from the gist of the invention, anyone of ordinary skill in the art to which the present invention will have the technical spirit of the present invention to the extent that various changes can be made.

Claims (4)

A rotation center member fixed to the door frame to become a rotation center of the door; A friction member coupled to surround an outer circumference of the rotation center member to slow the opening speed of the door by friction with the outer circumferential surface of the rotation center member; An elastic member wrapped around the outer periphery of the friction member and coupled to the friction member in a direction of the rotation center member; And, At the same time surrounding and coupled to the outer periphery of the elastic member, the door comprises a door connecting member coupled to the door, the door connecting member is a form that surrounds the elastic member in a circular shape, characterized in that the door is coupled to one side Hinge of the door. The hinge device of a door according to claim 1, wherein the friction member is any one selected from rubber, urethane or synthetic resin. The hinge device of a door according to claim 1, wherein the elastic member is any one selected from a leaf spring and a coil spring. delete

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