KR20040095594A - Hinge for Auto Closing Door - Google Patents

Abstract

PURPOSE: A hinge for an auto-closing door is provided to keep a door open by having a piston guide member which stops the ascent of a piston temporarily. CONSTITUTION: The hinge(200) for an auto-closing door comprises a housing(220) forming external appearance and housing internal components, an upper cap(210) coupled to make the upper side of the housing(220) closed up tightly, a hinge shaft(230) installed to be projected partially to the outside of the upper cap(210) and rotated by opening and closing a door, a piston guide member(240) fixed to an inner side(211) of the upper cap(210), a piston(260) moved vertically along a slit(241) formed on the piston guide member(240), a spring(270) providing elasticity from the base of the piston(260) as an elastic member, a flow control bar(280) coupled to the lower side of the piston in a lower cylinder space where the spring(270) is located to move a fluid of an upper cylinder space to a lower cylinder space, and a lower cap(290) coupled to make the lower side of the housing(220) closed up tightly and coupled to make a portion of a flow control bolt(282) exposed to the outside.

Description

Hinge for Auto Closing Door

The present invention relates to a versatile hinge device, and more particularly, to a hinge for an automatic closing door that can keep the door open while easily controlling the closing speed of the swing door.

When the door is opened after the passer-by through the door, the air-conditioning effect of the room is reduced, causing a lot of energy loss, and the soot or dust in the outside flows into the room, thereby deteriorating the indoor environment.

In order to make up for such drawbacks, hinges for self-closing doors have been developed and installed in doors. The hinge for the automatic closing door closes the open door by providing a force in the direction in which the door is closed, even if the person pushes the door and enters the door.

Such a technology related to the hinge for the automatic closing door is known from the Republic of Korea Patent Publication No. 2003-62930.

1 is a perspective view showing a hinge for a self-closing door according to the prior art, Figure 2 is an exploded perspective view showing a hinge for a self-closing door shown in Figure 1, Figure 3 is a hinge for a self-closing door shown in Figure 1 It is sectional drawing cut out in the longitudinal direction.

As shown in FIGS. 1 to 3, the hinge 100 for the self-closing door described in Korean Patent Laid-Open Publication No. 2003-62930 has a housing 120 that forms an exterior and a part of an upper surface of the housing 120. The hinge shaft 130, which is internally protruded, the piston 160 coupled to be movable up and down at the bottom of the hinge shaft 130, and guides the piston 160 to move up and down inside the housing 120. Flow control rod coupled to the lower portion of the piston 170 in the lower cylinder space in which the insert ring 140, the elastic member providing elasticity at the bottom of the piston 160, the spring 170 is installed 180 and a lower cap 190 installed on the lower surface of the housing 120 to seal the inside thereof.

In addition, in the hinge 100 for the self-closing door illustrated in FIG. 1, the drive shaft 132 of the protruding hinge shaft 130 is inserted into the door mounting plate D and the door frame mounting plate F sequentially. At this time, the door mounting plate (D) is integrally fixed to the upper surface of the housing 100, the door frame mounting plate (F) is integrally coupled to the drive shaft 132, the hinge shaft ( The rotation force acts on the drive shaft 132 of 130.

In addition, the drive shaft 132 of the hinge shaft 130 is inserted into the housing 120 so as to protrude to the upper surface of the housing 120, and the spline shaft 134 of the hinge shaft 130 is the piston 160. ) Is engaged inside. In addition, the piston 160 is moved up and down according to the guide of the piston housing 140 in accordance with the rotation of the hinge shaft (130).

In this case, the inner surface of the piston housing 140 is coupled to the outer surface of the spline boss of the piston 160, the outer surface is processed in a multi-faceted interview with the upper inner surface 121 of the housing 120. In addition, an insert ring 141 is inserted into a ring groove formed in the inner surface of the housing 120 at the lower portion of the piston housing 140, so that the piston housing 140 is inserted into the housing 120 by the insert ring 141. It is fixed without falling down.

The hinge for the self-closing door having such a configuration is operated as follows when the door is opened by the person.

The hinge shaft 130 fixed to the door frame has a rotational motion relative to the housing 120 fixed to the door as the door is opened. Then, the piston 160 is lowered along the serration of the piston housing 140 in accordance with the rotation of the hinge shaft 130 in the state engaged with the spline shaft 134 of the hinge shaft 130. Then, the descending piston 160 compresses the spring 170 located in the lower cylinder space of the housing 120. At this time, the fluid filled in the lower cylinder space is moved to the upper cylinder space through the fluid outlet and the throttle hole formed in the piston 160.

And, the hinge for the automatic closing door is operated as follows when the door is closed after the person passes.

After the person passes, no external force is applied to the door, and the hinge 100 for the self-closing door is operated by the elastic force of the compressed spring 170. Then, the piston 160 located above the spring 170 gradually rises and pressurizes the fluid filled in the upper cylinder space. At this time, the fluid is blocked by the check ball 162 located in the throttle hole, and moves downward along the flow path formed in the hydraulic control rod (180). Then, the hinge 100 for the automatic closing door is changed in the moving speed of the piston 160 according to the cross-sectional area of the flow path formed in the hydraulic control rod 180, the rotational speed of the hinge shaft 130 is changed, the closing speed of the door Adjusted.

As such, the hinge 100 for the self-closing door is moved up and down along the slewing groove of the piston housing 140 in a state where the piston 160 is engaged with the spline shaft 134 of the hinge shaft 130, The door opens and closes. However, in the prior art automatic closing door hinge 100, there is no means for fixing the door so that it is not closed in the state in which the door is opened to the maximum (that is, the point where the piston is located at the bottom dead center, see FIG. 3). That is, the hinge 100 for the automatic closing door of the prior art is immediately lowered by the spring force of the spring 170 when the piston 160 descends as the door is opened by an external force, and the external force is removed. Since it rises, there is a problem that the door cannot be kept open. Therefore, the hinge 100 for the automatic closing door of the prior art is a situation that requires additional fixing means for keeping the door open.

The present invention is provided to solve the problems of the prior art as described above, while providing a hinge for an automatic closing door having a fixing means for keeping the door open while the closing speed of the door is easily controlled. The purpose is.

1 is a perspective view showing a hinge for a self-closing door according to the prior art,

Figure 2 is an exploded perspective view showing a hinge for the automatic closing door shown in Figure 1,

3 is a cross-sectional view of the hinge for the self-closing door shown in Figure 1 cut in the longitudinal direction,

Figure 4 is an exploded perspective view showing a hinge for an automatic closing door according to an embodiment of the present invention,

5 is a cross-sectional view showing a hinge for an automatic closing door according to the present invention in a state where the door is open,

6 is a cross-sectional view showing a hinge for an automatic closing door according to the present invention in a state in which the door is closed.

♠ Explanation of symbols on the main parts of the drawing ♠

100, 200: hinge for automatic closing door 210: upper cap

120, 220: housing 130, 230: hinge shaft

160, 260: piston 240: piston guide member

The hinge for the self-closing door of the present invention for achieving the object as described above is a housing that forms an appearance, a hinge axis which is internally protruded so that a portion protrudes into the upper portion of the housing, and is engaged with the lower portion of the hinge axis for vertical movement. A piston, a spring providing elasticity in the lower part of the piston, a fluid respectively filled in the upper and lower cylinder spaces of the housing, and a flow path formed so that the fluid is discharged into the lower cylinder space and controlling the closing speed of the door. It includes a control rod and a lower cap for sealing the interior of the housing. The piston includes a piston boss engaged with the spline shaft of the hinge shaft, and a piston head coupled to a lower portion of the piston boss and in close contact with an inner surface of the housing. A guide pin is coupled to the upper portion of the piston boss so as to protrude in the outer axial direction, and the guide pin of the piston boss is inserted into the piston guide member for guiding the vertical movement of the piston. The piston guide member is integrally coupled to an inner portion of the upper cap in a tubular shape in which an upper and lower side is opened, and a slit portion is formed from a lower side to an upper side, which is one end in a longitudinal direction thereof, and the guide pin is connected to the slit portion. It is moved up and down, and the locking jaw is cut off in one circumferential direction at the lower end side of the slit so that the lowered piston is not moved upward.

In the following, with reference to the accompanying drawings a preferred embodiment of the hinge for an automatic closing door according to the present invention will be described in detail.

Figure 4 is an exploded perspective view showing a hinge for a self-closing door according to an embodiment of the present invention, Figure 5 is a cross-sectional view showing a hinge for a self-closing door according to the present invention in a state that the door is open, Figure 6 It is sectional drawing which shows the hinge for automatic closing doors which concerns on this invention in the state in which a door is closed by hydraulic pressure.

As shown in Figures 4 to 6, the hinge 200 for the self-closing door of the present invention has a circular tubular housing 220 that forms the exterior and accommodates the internal components, and the upper portion of the housing 220 The upper cap 210 is coupled to seal the surface, the hinge shaft 230, which is internally protruded to the outside of the upper cap 210 and rotates according to the opening and closing of the door, and the upper cap 210. The piston guide member 240 fixedly coupled to the inner portion 211, the piston 260 moved up and down along the slit portion 241 formed in the piston guide member 240, and the bottom surface of the piston 260 A spring 270 that is an elastic member providing elasticity and a flow control rod coupled to the lower side of the piston 260 in the lower cylinder space where the spring 270 is located to move the fluid in the upper cylinder space to the lower cylinder space ( 280 and the lower surface of the housing 220 to be sealed. The sum is, part of the flow control bolt 282 for adjusting the flow rate of the fluid includes a bottom cap 290 is coupled to be exposed to the outside.

In particular, the hinge 200 for the automatic closing door of the present invention, the piston 260 is moved up and down along the slit portion 241 of the piston guide member 240, the locking step 242 of the piston guide member 240 As the guide roller 264 of the piston 260 is caught, the piston 260 does not move upward. In such a configuration, the present invention can be kept in the open state because the piston 260 located in the lower portion is not moved to the upper by the locking step 242.

In the present invention as described above, the upper cap 210 is fastened to the upper surface side of the housing 220 for receiving the internal components. The upper cap 210 has a shaft through-hole formed in the center of the cross section so that the drive shaft 232 of the hinge shaft 230 protrudes, and the piston housing 240 to the inner portion 211 by a method such as fit fit. Inserts are combined. In addition, the upper cap 210 is tabbed on its outer surface to be coupled to the upper side of the housing 220, the coupling hole 212 is formed so that the door mounting plate (D) is coupled to the upper side.

The housing 220 to which the upper cap 210 is coupled is manufactured by extrusion molding or injection molding in a circular tube shape, and is tabbed so that the upper side thereof engages with the tabbed upper cap 210.

And, the door mounting plate (D) is fitted to the drive shaft 232 of the protruding hinge shaft 230, the door mounting plate (D) is fixedly coupled to the upper cap 210, the door mounting plate (D) The door frame mounting plate F is integrally engaged with and coupled to the upper portion of the inserted driving shaft 232. In such a configuration, the hinge 200 for the automatic closing door makes the hinge shaft 230 rotate relative to the housing 220 as the door is opened and closed.

The hinge shaft 230 is installed so that a part thereof protrudes through the shaft through hole of the upper cap 210. The hinge shaft 230 is connected to the drive shaft 232 protruding to the outside of the upper cap 210 and the spline shaft 234 is formed in order. A portion of the outer circumferential surface of the driving shaft 232 is formed as a hexagonal surface to which the door frame mounting plate F is fitted, and a shaft guider 231 protruding along the outer circumferential surface at the boundary between the driving shaft 232 and the spline shaft 234. Is formed. The hinge shaft 230 is inserted into the housing 220 in a state in which the quad ring 235 and the bearing 236 of the synthetic resin material having a ring shape are fitted to the drive shaft 232, respectively. At this time, the quad ring 235 and the bearing 236 reduce the vibration and friction caused by the rotation of the hinge shaft 230.

The piston guide member 240 is integrally coupled to the inner portion 211 of the upper cap 210. The piston guide member 240 is formed in a position in which the slit portions 241 are symmetrical with each other from the lower side to the upper side, which is one end in the longitudinal direction, in the tubular shape in which the upper and lower sides are open. In addition, the piston guide member 240 is formed by cutting the locking jaw 242 in one circumferential direction at the lower end side of the slit part 241, and the piston 260 is no longer lowered or rotated as a portion not cut at the lower end. Stop 243 is formed to prevent.

The piston 260 is a piston boss 261 engaged with the spline shaft 234 of the hinge shaft 230, and a piston head 262 coupled to the lower portion of the piston boss 261 and in close contact with an inner surface of the housing 220. It is composed of In addition, a spline groove that is engaged with the spline shaft 234 is formed on the inner circumferential surface of the piston boss 261, and the piston guide pin 263 is coupled to the upper portion of the piston boss 261 so as to protrude in the outer axial direction. In addition, the guide roller 264 is rotatably fitted to the guide pin 263, and the guide pin 263 into which the guide roller 264 is inserted is inserted into the slit portion 241 of the piston guide member 240. In addition, a fluid outlet 265 is formed in the piston boss 261 so that the fluid filled in the spline groove flows out into the upper cylinder space.

The piston head 262 of the piston 260 is formed with a throttle hole used as a passage for fluid to move from the lower cylinder space to the upper cylinder space, and the flow control rod 280 is inserted into and coupled to the central portion 266 of the end face. do. The diameter of the throttle hole decreases as it progresses from the top to the bottom, and a check ball 267 for selectively blocking the flow of the fluid is located inside the throttle hole. That is, the check ball 267 closes the throttle hole by the pressure of the fluid to be moved from the upper cylinder space to the lower side when the piston 260 rises, and the upper side in the lower cylinder space when the piston 260 descends. Is pushed upwards by the fluid to be moved.

The coil-shaped spring 270, which is an elastic member, is installed under the piston 260 to provide elasticity to the piston 260, and a flow control rod 280 coupled to the piston 260 is positioned at the center thereof.

Flow rate control rod 280 is formed in the inner center along the longitudinal direction, the lower portion is fixed to the lower cap 290 sealing the lower surface of the housing 220. In addition, the flow rate of the flow control rod 280 has a flow amount per unit time of the fluid less than the throttle hole, and has a constant diameter and has a streamline shape in which the diameter gradually widens from the top to the bottom. A discharge path 281 is formed in the flow control rod 280 so that the fluid filled in the flow passage flows into the lower cylinder space, and the flow control bolt 282 is inserted into the flow passage of the flow control rod 280.

The flow control bolt 282 is formed so that the end thereof corresponds to a streamlined shape of the flow path, is inserted and coupled to the flow path of the flow control rod 280, and the head is screwed to protrude outward. Then, the flow control bolt 282 is moved up and down according to the rotation operation of the user, thereby adjusting the flow amount of the fluid.

The lower cap 290 is coupled to the lower portion of the housing 220 to accommodate the internal components, the head portion of the flow control bolt 282 protrudes to the central portion 291.

Hereinafter will be described the operating relationship of the hinge for the automatic closing door of the present invention configured as described above.

When the door is opened by the person, the hinge 200 for the self-closing door of the present invention as shown in FIG.

The hinge shaft 230 is rotated relative to the housing 220 as the door is opened while the housing 220 is fixed to the door. Then, the piston 260 meshes with the spline shaft 234 of the hinge shaft 230 and descends along the slit portion 241 formed in the piston guide member 240. Then, the descending piston 260 compresses the spring 270, and the fluid filled in the lower cylinder space moves to the upper cylinder space through the fluid outlet 265 and the throttle hole of the piston 260. In addition, after the door is opened at a predetermined angle, that is, after the piston 260 is lowered by a certain distance, the piston 260 leaves the slit portion 241 and covers the locking step 242. Therefore, the hinge 200 for the self-closing door of the present invention, since the piston 260 does not rise even if no external force acts on the door after the person passes, the door is kept open.

In the state in which the door is opened after the person passes, the hinge 200 for the self-closing door of the present invention operates as shown in FIG. 6.

When the person wants to close the door after passing, the external force is transmitted to the hinge shaft 230 by slightly pushing the door. Then, the piston 260 engaged with the hinge shaft 230 is out of the locking jaw 242 as the guide roller 242 is rotated flexibly, and the slit portion 241 is opened by the elastic force of the compressed spring 270. To rise accordingly. At this time, the fluid filled in the upper space of the piston 260 is blocked by the throttle hole by the check ball 267, and is discharged to the lower cylinder space along the flow path formed in the hydraulic control rod 280.

At this time, since the flow amount of the fluid can be controlled by the flow control bolt 282, the present invention is to reduce the ascending speed of the piston 260 and the rotational speed of the hinge shaft 230 compared to when the door is opened do. Then, the door is closed without the action of the external force in accordance with the rotation of the hinge shaft 230.

As described in detail above, the hinge for the self-closing door of the present invention has an advantage of maintaining the door in the open state because it has a piston guide member that can temporarily prevent the rise of the piston, unlike the prior art. . For this reason, the door provided with the hinge for the self-closing door of the present invention is automatically closed even when no external force is applied, and is maintained in an open state so that a person can freely enter and exit as needed.

Although the technical idea of the hinge for the automatic closing door of the present invention has been described above with reference to the accompanying drawings, this is intended to illustrate the best embodiment of the present invention by way of example and not to limit the invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (3)

A housing forming an exterior, a hinge shaft internally protruded so that a part of the housing protrudes, a piston engaged with the lower portion of the hinge shaft for vertical movement, a spring providing elasticity at the lower portion of the piston, and the housing A fluid is respectively filled in the upper and lower cylinder space of the, the flow path is formed so that the fluid is discharged to the lower cylinder space, the automatic closing door including a flow control rod for controlling the closing speed of the door, and a lower cap for sealing the inside of the housing In the dragon hinge, The piston includes a piston boss engaged with the spline shaft of the hinge shaft, and a piston head coupled to a lower portion of the piston boss and in close contact with an inner surface of the housing; A guide pin is coupled to an upper portion of the piston boss so as to protrude in an outer axial direction, and a guide pin of the piston boss is inserted into a piston guide member for guiding a vertical movement of the piston; The piston guide member is integrally coupled to the inner side of the upper cap in a tubular shape in which the upper and lower sides are open, and a slit portion is formed from the lower side, which is one end along the longitudinal direction, to the upper side, and the guide pin is vertically moved along the slit portion. The hinge for the self-closing door, characterized in that the locking jaw is cut off in one circumferential direction at the lower end side of the slit portion so that the lowered piston is not moved upward. The hinge of claim 1, wherein a guide roller is rotatably fitted to the guide pin and is inserted into the slit part. 3. The hinge of claim 1 or 2, wherein the piston guide member is provided one at a position in which the slit portions are symmetrical to each other.