JP2002512331A - Hinged automatic door closing machine - Google Patents

Abstract

(57) [Abstract] The hinge type automatic door closing machine includes a cylindrical housing 1 mounted on a door via a door mounting plate 6, and a hinge shaft 3 mounted on a door frame via a door frame mounting plate 7. Having. The hinge shaft 3 is inserted into the cylindrical housing 1. The door closing machine has a piston which is movable about a hinge axis 3 and is vertically movable while being locked to the housing 1 for rotational movement. When the housing 1 rotates, the piston moves up and down according to the rotation direction of the housing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to an automatic door closing machine, and more particularly to a hinged automatic door closing machine using a hydraulic mechanism for increasing the effect of opening and closing a door and providing convenience to a user.

[0002]

[Prior art]

Generally, conventional hinged automatic door closing machines for automatically closing doors,
A coil spring having an elastic force for determining a closing speed and a latching speed of the door is provided. However, in automatic door closing machines, a fixed lever or the like connected to a coil spring is usually used to adjust the closing and latching speed of the door, and it is not easy to change the elastic coefficient of the coil spring. , The entire door closing machine is bulky. To circumvent this problem, various types of door closing machines have been proposed.

FIG. 1 shows Korean Patent Application No. 97-7637 entitled “Hinges for Doors”. As shown, the hinge comprises a housing 500 attached to the door 1, a drive member 400 disposed above the stroke control portion and the buffer unit 600 integrally formed with the inner surface of the internal void portion of the housing 500, The door frame 2 is disposed on the driving member 400 at a position within the internal cavity of the housing.
And a slider 700 which is fitted in the stroke control portion and moves up and down. The slider 700 can move up and down along the hinge axis 300 by screwing with the hinge axis 300. As the slider 700 descends, it compresses the lower spring. The buffer unit 600 for avoiding the impact of a slam when the door 1 closes uses the air pressure generated by the restoring force of the lower spring of the slider 700.

[0004] Although the above-described conventional door closing machines can perform the tasks assigned to them, there is still a need for further improved door closing machines. In particular,
Since the buffer unit has many parts mechanically combined with each other,
It is troublesome to manufacture these components and combine them into a unit. Furthermore, due to the limited space in the housing, the impact of a slam cannot be completely avoided with air pressure. Furthermore, according to the structure of the buffer unit, it is difficult to adjust its buffering power.

[0005]

Summary of the Invention

Therefore, a first object of the present invention is to avoid the impact of a slam in place of the mechanical buffer unit used in the prior art, and to easily adjust the buffering force, and thus to open and close the door. It is an object of the present invention to provide a hinged automatic door closing machine that is configured to use a hydraulic mechanism that increases the effect of the present invention and provides convenience to a user.

[0006] The above and other objects of the present invention are to provide a cylindrical housing integrally formed with a hydraulic control body on one side, a connector having a cap shape and engaged around an upper portion of the housing, and a door. A door mounting plate attached to the upper end surface of the housing and combined with the housing; a door frame mounting plate attached to the door frame, meshed around the connector using screws, and fixed to the connector by a nut; and A hinge shaft rotatably mounted in the door frame and fixed to the door frame via a connector, a piston engaged with the hinge shaft and vertically moving in a fluid-filled cylinder chamber to function as a check valve; and a piston. And a spring for applying a restoring force to raise the piston, and penetrating through three passages and a hydraulic control body. This is accomplished by providing a hinged automatic door closure having a pair of control valves for controlling the flow of fluid through a passageway.

[0007] The above and other objects and features of the present invention will become apparent from the following description of preferred embodiments in combination with the accompanying drawings.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

Next, a preferred embodiment of the hinge type automatic door closing machine of the present invention will be described with reference to FIGS.

FIG. 2 is an exploded perspective view of the embodiment according to the present invention. As shown, the hinge type automatic door closing machine of the present embodiment includes a cylindrical housing 1 integrally formed with a hydraulic control body 2 on one side, and a semicircular wall protrudes from an upper portion of the housing 1. On its inner surface, inner spline teeth 1a are provided. A hinge shaft 3 is rotatably mounted in the housing 1. The hinge type automatic door closing machine according to the present embodiment further includes a connector 5, a flange 5 a is provided at a lower end thereof, a screw 5 b is formed in a side portion, and a hexagonal hole into which an upper portion of the housing 1 is inserted. 5c extends through the connector 5. The door closing machine according to the present embodiment is further mounted on a door frame 30 which is mounted on the upper end surface of the door 20 and has spline teeth 6a formed around the protruding portion, and is mounted on the door frame 30 using screws. A door frame mounting plate 7 meshed around the connector 5 and secured to the connector 5 by a nut 8.

FIG. 3 is a sectional view of the housing 1. As shown, the hinge shaft 3 is rotatably mounted in the housing 1. The hinge shaft 3 includes a helical shaft 3b formed on the lower side of a shaft flange 3a located at an intermediate portion, a hexagonal portion 3c having a hexagonal cross section fitted into a hexagonal hole 5c of the connector 5, and a nut formed on an upper portion. 16 screw 3d. A bush 9 and a packing 10 are arranged on an upper surface of the hinge shaft 3 which comes into contact with the housing 1.

Since the piston 11 is engaged with the spiral shaft 3b and the key 11a is held between the outer surface of the piston 11 and the key groove 1b formed on the inner surface of the housing 1, the spiral shaft 3b The piston moves up and down in the fluid-filled cylindrical chamber 1c in accordance with the rotation direction of. A central passage 11 b through which the fluid flows into the piston 11 when the piston 11 descends is formed through the lower end of the piston 11. To prevent the fluid from flowing back through the central passage 11b into the cylinder chamber 1c when the piston 11 rises, a ball 14 is held above the central passage 11b so as to function as a check valve. A spring 12 for applying an elastic force is held below the piston 11. A cap 13 is engaged with the lower end of the housing 1.

It is preferable to make the helix angle of the helix shaft 3b as large as possible.

A plurality of grooves 3 e are provided along the outer peripheral surface of the hinge shaft 3, and in order to fix the hinge shaft 3 to the housing 1, bolts can be aligned with the grooves 3 e. Through the screw hole 1d provided through the housing 1.

A passage 2 a extends through a hydraulic control body 2 integrally formed with the housing 1. In order to allow the inside of the housing 1 to communicate with the passage 2a, three passages 1e are provided through the housing. The upper two of them are pistons 1 when they stay at top dead center.
1 are located above and below the lower plate, respectively, and the remaining passages are
Is located in the lower part. A pair of control valves 4 are mounted on the upper and lower portions of the hydraulic control body 2, respectively, for controlling the fluid flow through the passage 1e.

Referring to FIGS. 4 and 5, the control of the flow through the passage 1e is performed by rotating the adjustment rod 4a of the control valve 4 in the passage 2a. That is, the adjustment rod 4a is provided with a vertical flat surface 4b that defines a constant space in the passage 2a that allows the fluid to flow.

Referring to FIG. 6 and FIG. 7, the hinge type automatic door closing machine of the present embodiment configured as described above is assembled as follows.

First, mounting plates 6 and 7 are attached to door 20 and door frame 30, respectively.
Attach to Next, after fitting the connector 5 into the mounting plates 6 and 7,
A nut 8 is screwed around the connector 5. Next, the hinge shaft 3 protruding from the housing 1 is inserted into the connector 5. In this step, the inner spline teeth 1a of the housing 1 and the spline teeth 6a of the door mounting plate 6 mesh with each other.
Finally, the nut 16 is screwed onto the screw of the hinge shaft 3.

Before inserting the hinge shaft 3 into the connector 5, it is preferable to lower the piston 11 to a certain distance from its top dead center. This is done by rotating the hinge shaft 3 by a predetermined angle or a turning amount to lower the piston 11, and then inserting the bolt through one of the screw holes 1d into one of the grooves 3e so that the hinge shaft 3 is moved relative to the housing 1. Can be done by locking. When the bolt is removed from the groove 3e after all the assembly steps are completed, the door 20 comes into close contact with the door frame 30 by the restoring force of the spring 12 pushed down by the piston 11.

In the hinged automatic door closing machine of the present embodiment assembled as described above, when the operator opens the door 20, the hinge shaft 3 is connected to the door frame 30 via the connector 5 and the door frame mounting plate 7. , The housing 1 does not rotate, but rotates because the housing 1 is fixed to the door 20 via the inner spline teeth 1 a and the door mounting plate 6. At that time, the piston 11 locked to the housing with respect to the rotational movement by the key 1b rotates around the helical shaft 3b and descends to push down the fluid and the spring 12. That is, the operator opens the door 20 against an appropriate force, ie, a force that pushes down on the spring 12 and the fluid.

When the piston 11 descends, the fluid in the cylinder chamber 1c is introduced into the space inside the piston 11 through the central passage 11b. The fluid introduced into the piston 11 is then introduced into the upper two passages 1e through various gaps, for example, the gap between the helical shaft 3b and the inner surface of the piston 11, and further into the passage 2a. At that time, the opening speed of the door 20 can be adjusted by rotating the adjustment rod 4a to control the cross-sectional area where the fluid flows in the passage 2a.

When the operator closes the door 20, the reverse rotation of the housing 1 can raise the piston 11 and return the spring 12. The central passage 11b is closed by the ball 14, and the fluid filling the inside or outside of the upper part of the piston 11 can flow only through the passage 2a, so that the piston 11 rises slowly. As a result, the door 20 closes at a slow constant speed. The closing speed of the door 20 can be adjusted as in the case of opening the door.

When the piston 11 reaches the top dead center, the piston moves to the central passage 1 of the three passages 1e.
block e. As a result, it becomes more difficult for the fluid to flow into the passage 2a.
A door that is closing at a slow, constant speed rotates at a lower speed. This is necessary to reduce the impact or noise that may occur when the door 20 contacts the door frame 30. In this structure, the door 20 first closes at a predetermined constant rotational speed, and then decelerates immediately before contacting the door frame 30.

FIG. 8 shows a modification of the present embodiment. As shown, the contact between the hinge shaft 3 and the piston 11 is made by the helical slide surfaces 31 and 111 formed on the lower end of the hinge shaft 3 and the upper surface of the piston 11 and fitted to each other. In this variant, when the housing 1 rotates, the piston 11 descends with its helical slide surface 111 displaced from the helical slide surface 31. The members other than the hinge shaft and the piston are the same as those in the above embodiment.

FIG. 9 shows another modification of the present embodiment. As shown, contact between the hinge shaft 3 and the piston 11 is caused by the lower end of the hinge shaft 3 and the piston 11 respectively.
This is done by the inclined sliding surfaces 32 and 112 formed on the upper surface and fitted together. In this modification, when the housing 1 rotates, the piston 11
Its inclined slide surface 112 descends while sliding on the inclined slide surface 31.
The members other than the hinge shaft and the piston are the same as those in the above embodiment.

On the other hand, in order to make the housing applicable to the existing door, the housing 1
It is configured to protrude from zero, but when applied to a new door being manufactured,
It is also possible to hide the housing so that it is not visible from the outside.

According to the present invention configured as described above, a proper closing and latching speed of the door can be obtained because the piston can be moved in the vertical direction under the appropriate pressure of the fluid. Further, the present invention allows for easy adjustment of closing and latching speeds with only a few simple operations. Further, the door closing machine according to the present invention can be easily applied to an existing door without significantly impairing the appearance, and can be mounted in a minimum space.

Although the present invention has been shown and described with reference to preferred embodiments, workers skilled in the art will recognize various changes and modifications without departing from the spirit and scope of the invention as defined in the claims. It will be appreciated that

[Brief description of the drawings]

FIG. 1 is a sectional view of a conventional hinged door closing machine.

FIG. 2 is an exploded perspective view of a hinge type automatic door closing machine according to an embodiment of the present invention.

FIG. 3 is a sectional view of a hinge type automatic door closing machine according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a partial sectional view of a control rod of the hinge type automatic door closing machine according to one embodiment of the present invention.

FIG. 6 is a perspective view showing a hinge type automatic door closing machine according to one embodiment of the present invention applied to a door.

FIG. 7 is a sectional view of a hinge type automatic door closing machine according to an embodiment of the present invention.

FIG. 8 is a sectional view of a hinge type door closing machine according to a modification.

FIG. 9 is a sectional view of a hinged door closing machine according to another modification.

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Claims (7)

[Claims] 1. A cylindrical housing integrally formed with a hydraulic control body on one side, a connector having a cap shape and engaging around an upper portion of the housing, and a connector attached to an upper end surface of a door. A door mounting plate combined with the housing; a door frame mounting plate attached to a door frame, meshed around the connector using screws, and secured to the connector by nuts; A hinge shaft fixedly attached to the door frame via the connector, the hinge shaft being engaged with the hinge shaft, and a relative rotation of the hinge shaft moving up and down in the cylinder chamber filled with fluid to check A piston functioning as a valve; a spring disposed below the piston to apply a restoring force to raise the piston; A hinge-type automatic door closing machine, comprising: a pair of control valves for controlling a flow of a fluid through three passages and one passage penetrating the hydraulic control body. 2. The door according to claim 1, wherein a semicircular wall having inner spline teeth on the inner surface protrudes from an upper portion of the housing, and the door mounting plate fixed to a door has spline teeth. 2. The hinge type automatic door closing machine according to 1. 3. The piston moves up and down according to the direction of rotation so that the piston and a spiral shaft formed below the hinge shaft mesh with each other by helical engagement. 2. The hinged automatic door closing machine according to 1. 4. A plurality of grooves are formed along an outer peripheral surface of the hinge shaft, and a plurality of grooves are formed through the housing at positions that can be aligned with the grooves to fix the hinge shaft to the housing. The hinge type automatic door closing machine according to claim 1, wherein a bolt is inserted into the provided screw hole. 5. The control valve according to claim 1, wherein the control valve includes an adjusting rod having a vertical flat surface that defines a space through which the fluid can flow in a passage formed through the hydraulic control body. The hinge type automatic door closing machine according to claim 1. 6. The contact between the hinge shaft and the piston is provided by a helical slide surface which is formed on the lower end of the hinge shaft and the upper surface of the piston and is fitted to each other. Item 4. The hinge type automatic door closing machine according to item 1. 7. The contact between the hinge shaft and the piston is provided by inclined sliding surfaces formed on the lower end of the hinge shaft and the upper surface of the piston and fitted to each other. Item 2. An automatic hinged door closing machine according to Item 1.