JP2002309839A - Door operating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door operating apparatus which automatically returns a door to a closed position or an opened position, and prevents the door from producing impact sound at the time of opening or closing operation. SOLUTION: According to the door operating apparatus, the door 3 for opening/closing an entrance 2 of a panel 1 has its one side portion supported by a second hinge 10b and a third hinge 10c. The second hinge 10b is formed of a hinge with a built-in damper, which applies a braking force to the door 3 when the door 3 approaches an opening/closing terminal zone, and the third hinge 10c is formed of a hinge with a built-in cam mechanism which automatically returns the door 3 to the closed position or the opened position. When the door 3 is automatically returned to the closed position or the opened position by the hinge with the built-in cam mechanism, the hinge with the built-in damper mechanism functions to apply a braking force to the door 3 in the closing/ opening terminal zone of the door 3, to thereby prevent the door from producing impulse sound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door opening / closing device for opening / closing an entrance formed in a panel with a door.

[0002]

2. Description of the Related Art A hinge with a built-in cam mechanism, which has a built-in cam mechanism as a hinge for freely opening and closing a door and which automatically returns the door to a closed position or an open position by the cam mechanism, has been known. ing. The cam mechanism built-in hinge is widely used for opening and closing a door of a public toilet.

[0003]

In a door opening / closing device in which a door is supported by a hinge with a built-in cam mechanism so that the door can be opened and closed, the door is automatically closed. Inconveniences such as generating a loud impact sound by colliding with the contact portion, or causing the overcoat layer to peel or break due to impact when the panel is a decorative panel with an overcoat layer formed of melamine resin or the like Occurs.

[0004] When the door is suddenly opened, an impact force is applied to the hinge attachment portion, which may damage the hinge attachment portion.

On the other hand, when the door is automatically opened, an impact force is applied to the hinge attachment portion when the door is opened, and the hinge attachment portion is damaged, or when the door is suddenly closed, The inconvenience of generating an impact sound occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to automatically return an opening / closing door to a closed position or an open position, and to provide an impact even when the door is automatically closed or opened, or when it is opened and closed vigorously manually. An object of the present invention is to provide a door opening / closing device that does not generate sound.

[0007]

According to the present invention, there is provided a panel having an entrance and an exit,
A door for opening and closing the doorway of the panel; and a plurality of hinges for rotatably supporting one side of the door. At least one of the plurality of hinges is a terminal area for opening and closing the door. A hinge with a built-in damper that applies a braking force by a damper action, and at least one of the remaining hinges is a hinge with a built-in cam mechanism that automatically returns the door to a closed position or an open position by a cam action. It was adopted.

As described above, the door is supported by the hinge with the built-in damper mechanism and the hinge with the built-in cam mechanism so as to be openable and closable, so that the hinge with the built-in cam mechanism automatically moves the door to the closed position or the open position. Can be returned.

Further, the hinge with a built-in damper mechanism applies a braking force to the door by a damper action of the damper mechanism in a terminal region of the opening and closing movement of the door, thereby preventing the door from impacting against the panel. Therefore, it is possible to prevent an impact sound from being generated or an impact force from being applied to the hinge attachment portion.

In the door opening / closing apparatus according to the present invention, as a hinge with a built-in damper mechanism, a fulcrum shaft provided on an upper portion of the rotor is slidably inserted into a bearing cylinder of a movable hinge member attached to the door, and is prevented from rotating. Then, the rotor is inserted into a bottomed barrel portion of a fixed hinge member attached to a panel to form a damper chamber filled with a viscous fluid in the bearing barrel portion of the fixed hinge member. A damper blade that is rotatable in the room is provided, and the rotational resistance of the damper blade in the rotation stroke in the terminal region in the rotation stroke is larger than the rotational resistance in the intermediate region. And a flow rate regulating means for regulating the flow rate of the viscous fluid to the low pressure chamber.

Here, a pair of grooves in the axial direction in which the groove depth gradually increases toward the above-mentioned end surface is formed at both ends on the inner periphery of the protrusion formed between both end surfaces in the circumferential direction of the damper chamber. And a pair of needle valves which are inserted into each groove and are in contact with the outer periphery of the rotor while being arranged in the shallow groove portion, and a circumferential groove formed on the outer periphery of the rotor, wherein the circumferential groove is formed. May have a circumferential length that allows the high-pressure chamber and the low-pressure chamber to communicate with each other in the intermediate region of the rotation stroke of the damper blade and blocks the communication in the terminal region.

In the door opening / closing device according to the present invention, the movable hinge member attached to the door, the fixed hinge member attached to the panel, and the bearing cylinder provided on each hinge member are provided as the cam mechanism built-in hinge. A mating slide bearing, and a fulcrum shaft that is inserted into both slide bearings and supports the movable hinge member and the fixed hinge member so as to be relatively rotatable, is provided on the opposed end faces of the pair of slide bearings in the circumferential direction. One having an inclined cam surface can be used.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the panel 1 has an entrance 2 and one side of a door 3 that opens and closes the entrance 2 has a first hinge 10 provided at intervals in the vertical direction.
a is supported by the third hinge 10c so as to be freely opened and closed.

FIGS. 2 and 3 show the details of the second hinge 10b which supports the center of the door 1 so that it can be opened and closed. The second hinge 10b is a hinge with a built-in damper mechanism that applies a braking force in an end region of the opening and closing movement of the door 3.

The second hinge 10b has a movable hinge member 11 attached to the door 3 and a fixed hinge member 12 attached to the panel 1. The movable hinge member 11 is screwed to the door 3 around the outer periphery of the bearing tube 13. A mounting piece 14 to be stopped is formed.

A sliding bearing 15 with a flange is fitted inside the bearing cylinder 13. The slide bearing 15 is prevented from rotating with respect to the bearing cylinder 13, and a fulcrum shaft 17 provided at the upper end of a rotor 16 is slidably inserted into the slide bearing 15 and is prevented from rotating.

In preventing rotation of the fulcrum shaft 17, here,
The fulcrum shaft 17 is formed with a square shaft portion 17a, while the sliding bearing 15 is formed with a square hole portion 15a into which the square shaft portion 17a is fitted.
And the fulcrum shaft 17 is prevented from rotating by the engagement between the square hole 15a and the square shaft 17a.

The fixed hinge member 12 has a mounting piece 19 which is screwed to the panel 1 on the outer periphery of the bearing cylinder 18. The bearing cylinder 18 has a bottom, and the rotor 16 is inserted into the bearing cylinder 18.

A damper chamber 20 is formed in the bearing cylinder 18, and the damper chamber 20 is filled with a viscous fluid.
The rotor 16 has an engagement groove 21 at the upper part of the outer periphery, and an O-ring 22 attached to the engagement groove 21 is in close contact with the inner periphery of a seal ring 23 press-fitted into the opening of the damper chamber 20 to allow the viscous fluid to flow outside. To prevent leakage. The rotor 16 is provided with damper blades 24 extending in the axial direction. The damper blades 24 are provided at both circumferential end surfaces 20 a, 20 a of the damper chamber 20.
A small leak gap 25 is provided between the outer peripheral surface of the damper chamber 20 and the inner peripheral surface of the damper chamber 20.

The rotation stroke of the damper blade 24 is substantially equal to the opening / closing angle of the door 3. When the door 3 closes the entrance 2, the damper blade 24 is moved to the one end face 20 of the damper chamber 20.
a, and the door 3 contacts the other end surface 20b of the damper chamber 20 in a state where the door 3 opens the entrance 2.

In the damper chamber 20, the damper blades 2
During the rotation of the damper blade 4 in the forward and reverse directions, a high-pressure chamber is formed on the front side in the rotation direction of the damper blade 24, and a low-pressure chamber is formed on the rear side in the rotation direction. Between the high and low pressure chambers,
A flow control mechanism 30 is provided to control the flow of the viscous fluid from the high-pressure chamber to the low-pressure chamber.

The flow rate regulating mechanism 30 includes a pair of axial grooves 31a, 31b formed at both ends on the inner periphery of the protruding portion 26 between both end surfaces 20a, 20b in the circumferential direction of the damper chamber 20;
It comprises a pair of needle valves 32a, 32b incorporated in each of the axial grooves 31a, 31b, and a circumferential groove 33 formed on the outer periphery of the rotor 16.

The pair of axial grooves 31a and 31b have a gradually increasing groove depth toward the end surfaces 20a and 20b of the damper chamber 20. The needle valves 32a, 32b incorporated in the axial grooves 31a, 31b are connected to the axial grooves 31a, 31b.
The needle valves 32a and 32b are movable within a range in which the needle valves 32a and 32b are in contact with both circumferential ends of the b.
The needle valve 32a is disposed in the shallow groove portion of the base valve 31b,
The reference numeral 32b contacts the outer periphery of the rotor 16.

The circumferential groove 33 connects the high-pressure chamber on the front side in the rotation direction of the damper blade 24 and the low-pressure chamber on the rear side in the rotation direction of the damper blade 24 in an intermediate region in the rotation stroke of the damper blade 24, and both chambers in the end region of the rotation stroke. It has a circumferential length that blocks communication between them.

Here, in FIG. 3 (I), one of the damper chambers 20 partitioned by the damper blades 24 is denoted by A,
Assuming that the other chamber is B, when the damper blade 24 rotates in the direction indicated by the arrow in the figure, the B chamber is a high-pressure chamber, and the A chamber is a low-pressure chamber. The high pressure chamber and the low pressure chamber are damper blades 2
4 is switched according to the rotation direction. That is, when the damper blade 24 rotates in the direction opposite to the arrow, the chamber A becomes a high-pressure chamber and the chamber B becomes a low-pressure chamber.

When the rotor 16 rotates in the direction indicated by the arrow in FIG. 3 (I), the needle valve 32b on the chamber B side rotates the rotor 16
The viscous fluid in the chamber B, which is a high-pressure chamber, smoothly flows from the circumferential groove 33 to the chamber A, which is a low-pressure chamber, and the rotational resistance applied to the damper blades 24 is small.
6 rotates smoothly.

When the damper blades 24 reach the terminal region as shown in FIG.
The communication between the chambers is interrupted, and the viscous fluid in the chamber B gradually flows from the leak gap 25 formed between the damper blade 24 and the inner peripheral surface of the damper chamber 20 to the chamber A. A large rotational resistance is applied to the blade 24, and a braking force is applied to the rotor 16 by the rotational resistance, so that the rotor 16 rotates at a low speed.

FIG. 4 shows the details of the third hinge 10c for supporting the lower end of the door 3 so that it can be opened and closed. This third hinge 10
c comprises a hinge with a built-in cam mechanism for automatically returning the door 3 to the closed position. The third hinge 10c includes a movable hinge member 41 attached to the door 3 and a fixed hinge member 42 attached to the panel 1. Since the movable hinge member 41 and the fixed hinge member 42 have the same configuration, the movable hinge member 41 will be described below, and the same reference numerals will be given to the same components as those of the movable hinge member 41. Description is omitted.

The movable hinge member 41 has a bearing cylinder 43, and a mounting piece 44 screwed to the door 3 is formed on the outer periphery of the bearing cylinder 43. A sliding bearing 45 is fitted inside the bearing cylinder 43, and the sliding bearing 45 is prevented from rotating with respect to the bearing cylinder 43.

The sliding bearing 45 is provided coaxially with two cam cylinders 46 and 47 having different diameters, and cam surfaces 46a and 47a which are inclined in the circumferential direction are formed on the tip surfaces of the cam cylinders 46 and 47, respectively. The cam surface 46a formed on the large-diameter cam cylinder 46 and the cam surface 47a formed on the small-diameter cam cylinder 47 are 180 ° out of phase in the circumferential direction.

The lower end of a fulcrum shaft 48 is inserted into a slide bearing 45 provided on the fixed hinge member 42. The fulcrum shaft 48 is fixed to a sliding bearing 45, and the upper portion thereof is slidably inserted into a sliding bearing 45 provided on the movable hinge member 41, and the fulcrum shaft 48 allows the movable hinge member 41.
And the fixed hinge member 42 are relatively rotatably supported.

In the third hinge 10c having the above structure, when the door 3 is opened in a state where the third hinge 10c rotatably supports the door 3, the movable hinge member 41 is fixed around the fulcrum shaft 48. The rotation relative to the hinge member 42 is performed. At this time, the cam surfaces 46a and 47a of the slide bearing 45 provided on the movable hinge member 41 are connected to the cam surfaces 46a and 47a of the slide bearing 45 provided on the fixed hinge member 42.
Move along. Therefore, the door 3 moves upward while rotating in the opening direction.

When the door 3 is opened at a predetermined angle and the rotational operation force on the door 3 is released after the door 3 is opened, the weight of the door 3 acts on the contact portions of the cam surfaces 46a and 47a which abut each other. The cam surfaces 46a, 47a of the slide bearing 45 provided on the fixed member 41 move along the cam surfaces 46a, 47a of the slide bearing 45 provided on the fixed hinge member 42, and the door 3 rotates and descends to the closed position. Returned automatically.

FIG. 5 is a first view of the first side supporting the upper side of the door 3.
The hinge 10a is shown. The first hinge 10a is a sliding hinge. The first hinge 10a has a movable hinge member 51 attached to the door 3 and a fixed hinge member 52 attached to the panel 1. Both hinge members 51 and 52 form an attachment piece 54 on the outer periphery of the bearing cylinder 53. A sliding bearing 55 is fitted in each bearing cylinder 53 to prevent rotation, and the upper part of a fulcrum shaft 56 whose lower end is supported by the sliding bearing 55 on the fixed hinge member 52 side is placed on the movable hinge member 51 side. 55, the movable hinge member 51 is rotatable,
And it is supported movably in the axial direction.

The door opening / closing device shown in the embodiment has the above structure. When the door 3 is opened, the door 3 is rotated in the opening direction by the cam action of the third hinge 10c having a cam mechanism built-in hinge. Move upward.

When the door 3 moves upward, the first hinge 1
The movable hinge member 51a moves in the axial direction along the fulcrum shaft 56, and the movable hinge member 11 in the second hinge 10b also moves in the axial direction along the fulcrum shaft 17, thereby moving the door 3 upward. Does not inhibit

By the rotation of the door 3, the rotor 16 of the second hinge 10b comprising the hinge with a built-in damper shown in FIG. 3 rotates in the direction shown by the arrow in FIG. At this time, since the circumferential groove 33 formed in the rotor 16 is in a state of communicating the chamber A and the chamber B, the hydraulic oil in the chamber B smoothly flows into the chamber A, and the rotational resistance applied to the rotor 16 is small. The door 3 opens smoothly.

When the door 3 reaches the terminal region of the opening movement, as shown in FIG. 3 (II), the circumferential groove 33 formed in the rotor 16 blocks the communication between the chamber A and the chamber B. The viscous fluid flows from the leak gap 25 formed between the outer peripheral surface of the damper blade 24 and the inner peripheral surface of the damper chamber 20 to the chamber A. For this reason, the damper blade 2
4 is given a relatively large rotational resistance, and a braking force is applied to the door 3.

Therefore, even if the door 3 is vigorously opened, the speed of the door 3 is decelerated in the opening end region, so that an impact force is not applied to the hanging side of the door 3. it can.

The door 3 is opened to a predetermined position, and the door 3 is opened.
Is released, the weight of the door 3 is applied to the contact portion between the cam surfaces 46a and 47a in the third hinge 10c, so that the cam surface 46 on the movable hinge member 41 side.
a and 47a are cam surfaces 46a on the fixed hinge member 42 side,
Moving along 47a, the door 3 rotates in the closing direction.

At this time, the needle valve 32b on the chamber B side shown in FIG. 3 (III) moves to the deep groove portion of the axial groove 31b,
The viscous fluid in the chamber flows from the gap 27 formed between the outer peripheral surface of the rotor 16 and the inner peripheral surface of the protruding portion 26 to the chamber B, and the flow of the viscous fluid causes the needle valve 32a in the chamber A to move in the axial groove 31a. Move toward the shallow groove of.

Almost at the same time when the needle valve 32a comes into contact with the outer peripheral surface of the rotor 16, the circumferential groove 33 connects the chamber A and the chamber B, and the viscous fluid in the chamber A passes through the chamber B through the circumferential groove 33. , And the door 3 smoothly rotates in the closing direction and descends.

When the door 3 reaches the end region of the closing movement, the circumferential groove 33 cuts off the communication between the chamber A and the chamber B, and the viscous fluid sealed in the chamber A imparts rotational resistance to the damper blade 24, While the braking force is applied to the door 3, the viscous fluid in the chamber A flows into the chamber B from the leak gap 25 formed between the outer peripheral surface of the damper blade 24 and the inner peripheral surface of the damper chamber 20, and the door 3 is slowly moved. Return to the closed position with the condition.

As described above, since the door 3 which automatically returns to the closed position is decelerated in the closing end area, the panel 1 is closed.
There is no inconvenience that the door 3 collides with the door stop surface by impact, and it is possible to prevent the generation of a collision sound.

In the embodiment, the upper part of the door 3 is supported by the first hinge 10a formed of a sliding hinge, but the first hinge 10a is omitted, and the second hinge 10b formed of a hinge with a built-in damper and the cam are used. The door 3 may be supported by a third hinge 10c formed of a hinge with a built-in mechanism.

Although the door 3 is automatically returned to the closed position by the third hinge 10c, the door 3 may be automatically returned to the open position by the third hinge 10c.

[0047]

As described above, according to the present invention, the door for opening / closing the doorway is provided with a damper built-in hinge for applying a braking force in the end region of the opening / closing operation, and the door is automatically moved to the closed position or the open position by the cam action. The door is automatically supported by a hinge with a built-in cam mechanism, so that the door can be automatically returned to the open or closed position, and the door can be opened and closed vigorously during automatic closing or automatic opening or manually. When the door is opened, the door is decelerated by the damper action in the end area of the opening and closing movement, so that it is possible to prevent the generation of an impact sound. Further, it is possible to prevent the impact force from being applied to the hanging side of the door.

[Brief description of the drawings]

FIG. 1 is a front view of a door opening and closing device according to the present invention.

FIG. 2 is an enlarged sectional view showing details of a second hinge shown in FIG. 1;

FIG. 3 (I) is a sectional view taken along the line III-III in FIG. 2;
(II) and (III) are sectional views showing the operation step by step.

FIG. 4 is an enlarged sectional view showing details of a third hinge shown in FIG. 1;

FIG. 5 is an enlarged sectional view showing details of a first hinge shown in FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 panel 2 doorway 3 door 10b second hinge (hinge with built-in damper mechanism) 11 movable hinge member 12 fixed hinge member 13 bearing cylinder 16 rotor 17 fulcrum shaft 18 bearing cylinder 20 damper chamber 20a, 20b end face 24 damper blade 26 protrusion Part 10c Third hinge (hinge with built-in cam mechanism) 41 Movable hinge member 42 Fixed hinge member 43 Bearing cylinder part 46a, 47a Cam surface 48 Support shaft

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhisa Horikawa 2-12-21 Shimanouchi, Chuo-ku, Osaka-shi F-term in Shibutani Co., Ltd. (reference) 3J105 AA14 AB02 AB13 AB24 AC10 BA07 BB14 BB15 BB16 BB26 BC02 BC54 DA50

Claims (4)

[Claims] 1. A panel having a doorway, a door for opening and closing the doorway of the panel, and a plurality of hinges rotatably supporting one side of the door, wherein at least one of the plurality of hinges is provided. One of the hinges is a damper built-in type that applies a braking force by a damper action in a terminal area of the opening and closing movement of the door, and at least one of the remaining hinges is automatically moved to a closed position or an open position by a cam action. Door opening / closing device with a built-in return cam mechanism. 2. The damper mechanism built-in type hinge slidably inserts a fulcrum shaft provided on an upper part of a rotor into a bearing cylinder part of a movable hinge member attached to a door, and stops the rotor from rotating. A damper chamber filled with a viscous fluid is formed in the bearing cylinder part of the fixed hinge member, which is rotatable in the outer periphery of the rotor. Viscosity from the high-pressure chamber on the front side in the rotation direction of the damper blade to the low-pressure chamber on the rear side in the rotation direction so that the rotation resistance in the terminal region in the rotation stroke of the damper blade is greater than the rotation resistance in the intermediate region in the rotation stroke of the damper blade 2. The door opening / closing device according to claim 1, wherein the door opening / closing device has a configuration in which a flow amount regulating means for regulating a flow amount of the fluid is provided. 3. A pair of grooves in the axial direction in which the depth of the groove gradually increases toward the end face at both ends on the inner periphery of the protrusion formed between both end faces in the circumferential direction of the damper chamber. When,
A pair of needle valves inserted into each groove and in contact with the outer periphery of the rotor while being arranged in the shallow groove portion; and a circumferential groove formed on the outer periphery of the rotor, wherein the circumferential groove is a damper. 3. The door opening / closing device according to claim 2, wherein the high-pressure chamber and the low-pressure chamber communicate with each other in an intermediate region in a rotation stroke of the blade, and have a circumferential length that blocks the communication in a terminal region. 4. A hinge having a cam mechanism built-in type comprising: a movable hinge member attached to a door; a fixed hinge member attached to a panel; and a slide bearing fitted in a bearing cylinder provided on each hinge member. A fulcrum shaft which is inserted into the sliding bearings and rotatably supports the movable hinge member and the fixed hinge member, wherein a cam surface inclined in the circumferential direction is formed on opposite end surfaces of the pair of sliding bearings. Item 4. The door opening and closing device according to any one of Items 1 to 3.