JP2008121204A - Automatic door closing hinge and double hinged door structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic door closing hinge and a double hinged door structure having this automatic door closing hinge, for absorbing a shock by an air damper installable in a double hinged door opening to the inside and outside. <P>SOLUTION: This automatic door closing hinge 1 is formed so that a spherical body 43 is engaged with a position opposed to a cam groove 35 formed in a substantially V shape in an opposed position of an outer peripheral surface of an operation rod in a cylinder 2 and continuing in a peripheral shape, and the spherical body 43 is engaged with a compression ring 4 energized downward by restoring force of a compression coil spring 5, and the movement of the spherical body 43 to the cam groove 35 is interlocked with the vertical movement of the compression ring 4, and is constituted so that a spherical body 65 is engaged with a position opposed to a cam groove 36 of the substantially same shape as the cam groove 35 and formed on the lower side of the cam groove 35, the spherical body 65 is engaged with a piston 6, and the movement of the spherical body 65 to the cam groove 36 is interlocked with the vertical movement of the piston 6. Air on the lower side of the piston 6 in the cylinder 2 is gradually made to flow out in response to lowering of the piston 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automatic door hinge having a buffering function by an air damper, and a double door structure including the automatic door hinge.

  Conventionally, there has been known an automatic door hinge with a buffering function that uses a restoring force of a coil spring to automatically close the open door in a closing direction and uses a hydraulic cylinder to buffer the impact when the door is closed. In recent years, instead of a hydraulic cylinder, an automatic door hinge that is buffered by an air damper has been proposed. In the automatic door hinge, for example, a piston is accommodated in a cylinder provided on one of a pair of slats, and an operation rod having an upper part fixed to the other slat is disposed in the cylinder. A cam groove having an inclined portion formed on the outer periphery of the lower portion is engaged with a sphere that is rotatably arranged at a predetermined position of the piston and protrudes on the inner periphery, and the piston corresponds to the movement of the sphere with respect to the inclined portion of the cam groove. There are some which cushion the shock by the action of air cushion in the cylinder by the return movement of the piston when the door is closed (see Patent Documents 1 and 2).

JP 2002-303072 A JP 2005-113682 A

  By the way, the automatic door hinge that is buffered by the air damper has excellent characteristics such as smooth buffering without polluting the surroundings due to oil leakage. This door is for a single door and cannot be installed on a double door that opens in and out. Therefore, an automatic door hinge that is buffered by an air damper and that can be installed on a double door that opens inside and outside is required.

  The present invention is proposed in view of the above problems, and an object thereof is to provide an automatic door hinge that cushions with an air damper that can be installed on a double door that opens inside and outside, and a double door structure that includes the automatic door hinge. To do.

  The automatic door hinge of the present invention has a cylinder, an operation rod that is pivotably attached to one end of the cylinder and restricted in movement in the longitudinal direction, and a position opposite to the outer peripheral surface of the operation rod in the cylinder. A first cam groove formed in a substantially V shape, a first sphere disposed to engage with a position facing the first cam groove, a first sphere engaged with the first sphere, A compression ring in which movement of the sphere relative to the first cam groove and movement in the longitudinal direction in the cylinder are interlocked, and the compression ring is disposed between the compression ring and the upper end of the cylinder, and the compression ring is disposed on the cylinder. The first coil groove is formed in a substantially V shape so that the upper and lower ends of the compression coil spring urging to the other end face the first cam groove and the upper and lower ends at opposite positions on the outer peripheral surface of the operating rod in the cylinder. A second cam groove disposed on the lower side; A second sphere disposed in engagement with the opposing position of the two cam grooves, a movement of the second sphere with respect to the second cam groove, and a length in the cylinder The piston includes a piston that moves in a direction, and an air damper that gradually flows out air from the bottom of the piston in the cylinder in accordance with the movement of the piston toward the other end.

  Further, the automatic door hinge of the present invention is characterized in that the substantially V-shaped first cam groove and the second cam groove at the opposed positions are continuously formed in a circumferential shape.

  In the automatic door hinge of the present invention, the height difference between the upper and lower ends of the second cam groove is longer than the height difference between the upper and lower ends of the first cam groove.

  Further, the automatic closing hinge of the present invention is provided with an air flow hole at the bottom of the piston, and the air flow hole has a large diameter part on the other end side of the cylinder, a small diameter part on one end side, and a space between the large diameter part and the small diameter part. The valve plate is formed with a gap communicating with the large diameter portion from one end side to the other end side, and can close the small diameter portion, and the other end of the cylinder And an adjustment screw portion capable of adjusting the size of the air flow path formed between the male screw and the female screw by the screwing strength.

  Further, in the double door structure that can be opened and closed inside and outside of the present invention, the automatic closing hinge is installed on the door support or door, and the receiving hinge attached to the automatic closing hinge is installed on the door or door support. Features. The door support portion is appropriate, for example, a pillar or a door frame.

  In the present invention, when the door is opened on the inner side, the first and second spheres move relative to one of the substantially V-shaped inclined portions of the first and second cam grooves, and the door on the outer side. When the door is opened, the first and second spherical bodies move relative to the other substantially V-shaped inclined portion of the first and second cam grooves, so that both doors can be opened and closed inside and outside. Can be automatically closed by a compression coil spring, and the closing operation of the two doors can be buffered by an air cushion action.

  Moreover, the manufacturing process can be simplified by forming the substantially V-shaped first and second cam grooves continuously in a circumferential shape.

  Further, by forming the height difference between the upper and lower ends of the second cam groove longer than that of the first cam groove, the volume of the air pool can be increased, and the cushioning function of the closing operation by the air cushion action can be enhanced. it can.

  In addition, a gap communicating from one end side to the other end side is formed between the valve plate of the air flow hole in the piston bottom portion and the large diameter portion, and the small diameter portion can be closed. By providing an adjustment screw part that can be adjusted by the strength of screwing, it is possible to ensure a smooth opening operation when opening the door, and to easily adjust the air cushion action to an appropriate level, The degree of air cushion action can be stabilized.

  Embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 5, the automatic door hinge 1 of the present embodiment is a cylinder 2 and an operation that is rotatably attached to the cylinder 2 with a part protruding outward from the upper end side of the cylinder 2. A rod 3, a short cylindrical compression ring 4 disposed on the outer periphery of the operation rod and housed in the cylinder 2, a compression coil spring 5 disposed on the compression ring 4 and housed in the cylinder 2, and below the compression ring 4 A piston 6 disposed on the side and housed in the cylinder 2 and an air adjusting unit 7 provided on the lower end side of the cylinder 2 are provided.

  The cylinder 2 has a substantially cylindrical hollow portion 21, and concave grooves 22 are formed in the front and rear positions of the inner surface in the vertical direction. A rectangular mounting plate 23 is integrally formed on the back side of the cylinder 2 so as to protrude to the left and right sides. By inserting a countersunk screw or the like into the mounting hole 24 of the mounting plate 23, the cylinder 2 can be connected to a column or door frame. Etc. can be attached. A cylindrical airtight ring 25 is fitted and fixed to the lower portion of the hollow portion 21.

  The operation rod 3 has a small-diameter portion 31 and large-diameter portions 32 and 33 that are substantially upper. A hexagonal mounting hole 311 in plan view is formed at the upper end of the small-diameter portion 31, and a projecting portion 313 is provided at substantially the center of the small-diameter portion 31 through the mounting pin 312 left and right. The loose insertion ring 314 for buffering the shock is provided on the outer periphery of the small diameter portion 31 so as to be idle. The small-diameter portion 31 is inserted into the insertion hole 341 of the upper cap 34 fixed to the upper end of the hollow portion 21 with a countersunk screw 342, and the loose insertion ring 314 pressed from the upper side by the protruding portion 313 contacts the upper surface of the upper cap 34. Touched. In this state, the upper end surface of the upper large-diameter portion 32 is disposed close to the lower surface of the upper cap 34, and the upper end surface of the loose insertion ring 314 and the large-diameter portion 32 is caught by the upper and lower surfaces of the upper cap 34. Movement in the vertical direction is restricted.

  Cam grooves 35 and 36 that are circumferentially continuous in a plan view are formed in a zigzag on the outer peripheral surface of the lower large-diameter portion 33, and in a state corresponding to when the door is opened in FIG. Each of 35 and 36 has a front center position as an upper end, is formed obliquely downward along the outer peripheral surface to the left and right from the front center position, and is a lower end at a lateral center position 90 degrees left and right from the front center position. Further, it is formed obliquely upward along the outer peripheral surface from the side surface center position serving as the lower end to the rear center position, and is the upper end at the rear center position, and the upper and lower ends of the cam grooves 35 and 36 are formed at corresponding positions. That is, the cam grooves 35 and 36 have an inverted V shape in a front view and a rear view in a state corresponding to an opening, and a V shape in a side view, and vice versa in a state corresponding to a closing door. The length of the upper cam groove 35 is smaller than the length of the lower cam groove 36, and the height difference between the upper end and the lower end of the cam groove 36 is higher than the height difference between the upper end and the lower end of the cam groove 35. It is getting bigger.

  The compression ring 4 is provided with a pin 41 protruding outward at each of the center positions of the front and back surfaces in FIGS. 1 and 2, and the pin 41 is engaged with the concave groove 22 on the inner surface of the cylinder 2. When the pin 41 moves up and down while engaging with the concave groove 22, the compression ring 4 can move up and down without rotating. Further, the compression ring 4 is formed with a substantially hemispherical spherical concave portion 42 at the abutting portion of the inner peripheral surface and the lower end surface at the center position of the left and right side surfaces in FIG. Two spherical bodies 43 are arranged so as to be capable of rolling, respectively. The spherical body 43 is always located at the center position of the left and right side surfaces in FIG. 1 even when the operation rod 3 is rotated by the engagement with the spherical concave portion 42 of the compression ring 4 that cannot rotate. When the operating rod 3 is rotated from the state shown in FIG. 1 to FIG. 5 by an external force, the sphere 43 rolls along the inclination of the cam groove 35 and moves from the lower end to the upper end of the cam groove 35. The compression ring 4 moves upward as a result of the movement. Further, the abutting portion between the inner peripheral surface and the upper end surface of the compression ring 4 is cut into an L shape in a circumferential shape, and is a recess 44 having a height lower than that of the upper end surface.

  The compression coil spring 5 is provided around the outer periphery of the upper portion of the large-diameter portion 32 and the large-diameter portion 33 of the operation rod 3, and the lower end thereof is placed on the lower surface of the concave portion 44 of the compression ring 4, and the upper end thereof is the upper cap. 34 is in contact with the lower surface. When the compression ring 4 is raised by the rotation of the operating rod 3 by the external force, the compression coil spring 5 is compressed by the ascent of the concave portion 44, and when the external force is removed, the concave portion 44 is formed by the restoring extension of the compression coil spring 5. The compression ring 4 urged downward is lowered, the sphere 43 moves relative to the cam groove 35 from the upper end to the lower end of the cam groove 35, and the operation rod 3 rotates from the state shown in FIG. 5 to the state shown in FIG.

  The piston 6 has a substantially bottomed cylindrical shape, and a short cylindrical outer fitting ring 62 is fitted on the upper end of the peripheral wall 61, and outwards at the center positions of the front and rear surfaces in FIGS. The upper end of the peripheral wall 61 of the piston 6 and the outer fitting ring 62 are joined together by a pin 63 protruding in the direction. The pin 63 is engaged with the concave groove 22 on the inner surface of the cylinder 2, and the pin 63 moves up and down while engaging with the concave groove 22, so that the piston 6 and the external fitting ring 62 can move up and down without rotating. It has become. Further, in the vicinity of the upper end of the peripheral wall 61 of the piston 6, an engagement hole 64 is formed so as to penetrate the center position of the left and right side surfaces. Two spheres 65 are arranged so as to be able to roll by engaging with the recesses formed and the cam groove 36 on the lower side of the operating rod 3. The spherical body 65 is always located at the center position of the left and right side surfaces in FIG. 1 even when the operating rod 3 is rotated by the engagement of the concave portion and the cam groove 36 by the engagement hole 64 and the external fitting ring 62. When the operating rod 3 is rotated from the state shown in FIG. 1 to FIG. 4 by an external force, the sphere 65 rolls along the inclination of the cam groove 36, and the cam groove 36 moves from the lower end to the upper end. The piston 6 moves upward as a result of the movement. When the compression coil spring 5 is restored and extended except for the external force, the spherical body 65 moves from the upper end to the lower end of the cam groove 36 with respect to the cam groove 36, and the piston 6 descends from FIG. 4 to the state of FIG. Moving.

  A flange 66 projecting outward is formed at the lower end of the piston 6, and a packing ring 661 is fitted into a circumferential groove formed in the flange 66 in a U-shaped cross section. In the descending operation, it slides while contacting the inner surface of the airtight ring 25 of the cylinder 2. In addition, an air circulation hole is provided at the center position of the bottom 67 of the piston 6, and the air circulation hole has an upper small diameter part 671, a lower large diameter part 672, a diameter larger than the large diameter part 672, and a small diameter part 671. The intermediate part 673 is located between the large diameter part 672 and the intermediate part 673 so as to have a gap in the vertical direction, and the small diameter part 671 can be closed in the vertical direction. However, it is installed so that it can move slightly up and down. When the piston 6 is lifted, the air above the piston bottom 67 flows from the small diameter portion 671, urges the valve plate 674 toward the large diameter portion 672, and flows downward from the partial gap to the bottom 67. Further, when the piston 6 descends, when the air gradually flows out from the air reservoir formed below the piston bottom 67 in FIG. 5 in the hollow portion 21, the sliding contact between the packing ring 661 and the airtight ring 25 makes contact. The state is maintained, and further, the valve plate 674 is urged upward by air and the small-diameter portion 671 is closed by contact, so that airtightness is secured and rapid air outflow upward of the piston bottom 67 is suppressed. .

  The air adjustment unit 7 includes a lower cap 71 and an adjustment screw portion 72. As shown in FIG. 4, the lower cap 71 has a substantially short cylindrical shape, and an air circulation hole 711 composed of an upper small-diameter portion and a lower large-diameter portion is formed in the center. An internal thread is formed on the peripheral surface, and is fixed to the lower end of the hollow portion 21 of the cylinder 2 with a countersunk screw 713. An O-ring 712 is fitted into the circumferential groove on the outer peripheral surface of the lower cap 71, and the O-ring 712 is disposed in contact with the lower inner peripheral surface of the airtight ring 25. The adjustment screw portion 72 is screwed onto a female screw at the lower portion of the large-diameter portion of the air flow hole 711, and an air flow path 721 having a substantially L shape in cross section is formed so as to come out from the upper end to the peripheral surface. A circumferential concave portion 722 is formed at a location where the air flow path 721 passes through the upper end surface of the upper end surface. A valve plate 73 having a minute air flow hole 731 at the center is placed in the recess 722. A ring-shaped spacer 74 having a flange 742 is disposed at the upper end of the large-diameter portion of the lower cap 71, and the spacer 74 has a lower end of the cylindrical portion 741 at the recess 722 of the adjusting screw portion 72 and the valve plate 73. The upper surface of the flange 742 is placed in contact with or close to the upper surface of the large-diameter portion. In the recess 722 of the adjustment screw portion 72, an O-ring 75 is fitted on the outer periphery of the cylindrical portion 741 of the spacer 74, and air outflow between the adjustment screw portion 72 and the spacer 74 is suppressed.

  For example, as shown in FIG. 6, the automatic door hinge 1 is attached to the column 101 by inserting the mounting plate 23 of the cylinder 2 along the side surface of the column and inserting a countersunk screw or the like into the mounting hole 24. Further, a receiving hinge 10 is attached to the upper right corner of the door 102 by being fixed by inserting a countersunk screw into the slat 12 and the door 102. A projection 14 having a hexagonal shape in plan view is formed on the upper end of the mounting hole 13 formed on the lower surface of the base 11 of the receiving hinge 10 so as to protrude downward, and the upper end of the operating rod 3 is inserted into the mounting hole 12. At the same time, the projection 14 is fitted into the mounting hole 311 at the upper end of the operating rod 3, and the receiving hinge 10 is fixedly attached to the operating rod 3. Similarly, the lower right corner of the door 102 and the column corresponding thereto can be similarly provided with a receiving hinge 10 and an automatic door closing hinge 1 or with a hinge for opening both doors that opens and closes normally. In the latter case, an empty hinge that does not have a buffer function or a door closing function may be used.

  In the open state of FIG. 6, the automatic door closing hinge 1 is in the state shown in FIG. When the door 102 is opened, the operation rod 3 rotates, the spheres 43 and 65 roll to move from the lower end to the upper end of the cam grooves 35 and 36, the compression ring 4 rises, and the compression coil spring As 5 is compressed, the piston 6 rises and the door is opened as shown in FIG. When the piston 6 is raised, the air between the lower surface of the operating rod 3 and the cylinder bottom 67 urges the valve plate 674 toward the large diameter portion 672, and the bottom 67 from the gap between the large diameter portion 672 and the valve plate 674. The air pool is formed between the cylinder bottom 67 and the lower cap 71.

  When the hand is released from the door 102 and the external force is removed, the compression coil spring 5 is restored and extended, the compression ring 4 is lowered, and the spheres 43 and 65 roll to start from the upper ends of the cam grooves 35 and 36. Shifting to the lower end, the operating rod 3 is rotated while lowering the piston 6, and the door is closed from FIG. 5 to FIG. When the piston 6 descends, the air in the air pool between the cylinder bottom 67 and the lower cap 71 gradually flows out from the minute air flow holes 731 of the valve plate 73, and the air flow path 721 and the adjustment screw portion 72. Since it is gradually discharged to the outside of the cylinder 2 through the outer peripheral region and the screwing region of the adjusting screw portion 72 and the lower cap 71, a cushioning function by an air cushion is obtained. The rotation of the operation rod 3 proceeds slowly. The degree of buffering by the air cushion can be adjusted by adjusting the strength of the screwing between the adjusting screw portion 72 and the lower cap 71. When the degree of buffering is increased by air outflow and screwing is weakened, in addition to air outflow from the air circulation hole 731, between the upper surface of the large diameter portion of the lower cap 71 and the flange 742 of the spacer 74, Alternatively, from between the spacer 74 and the concave portion 722 of the adjusting screw portion 72, through the outer peripheral region of the adjusting screw portion 72, the screwing region between the adjusting screw portion 72 and the lower cap 71 in which the air flow path is expanded by weak screwing. The air is gradually discharged to the outside of the cylinder 2 at a slightly high outflow speed, and the degree of buffering is reduced.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the cam groove 35 and the cam groove 36 can be formed in two substantially separated V-shapes at opposing positions. Further, the height difference between the upper and lower ends of the cam groove 36 is made longer than that of the cam groove 35 in order to obtain an appropriate automatic closing function and a damper function in accordance with the restoring force of the compression coil spring 5, the outflow amount of air, and the like. In addition, it is good also as a structure shortened on the contrary and the structure set as substantially the same length. Further, the air damper portion of the present invention can employ an appropriate configuration other than the configuration of the cylinder 2, the piston 6 and the air adjustment portion 7 of the above-described embodiment. May be used. In addition, the air damper part by the cylinder 2, piston 6, and the air adjustment part 7 of the said embodiment can be used also for the single door which opens only inside or the outside.

  The present invention can be used as a hinge of a double door that opens inward and outward.

The partially longitudinal explanatory view which shows the state corresponding to the time of opening of the automatic door-closing hinge of embodiment of this invention. The front view which shows the automatic door hinge of FIG. The bottom view which shows the automatic door hinge of FIG. The expanded explanatory view which shows the lower cap periphery of the automatic door hinge of FIG. FIG. 2 is a partially longitudinal explanatory view showing a state corresponding to closing of the automatic door hinge of FIG. 1. The partial front view which shows the double door structure provided with the automatic door hinge of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Automatic closing hinge 2 ... Cylinder 21 ... Hollow part 22 ... Groove 23 ... Mounting plate 24 ... Mounting hole 25 ... Airtight ring 3 ... Operation rod 31 ... Small diameter part 311 ... Mounting hole 312 ... Mounting pin 313 ... Projection part 314 ... Loose ring 32, 33 ... Large diameter portion 34 ... Upper cap 341 ... Insertion hole 342 ... Countersunk screw 35, 36 ... Cam groove 4 ... Compression ring 41 ... Pin 42 ... Spherical recess 43 ... Spherical body 44 ... Depression 5 ... Compression coil spring 6 ... piston 61 ... peripheral wall 62 ... external fitting ring 63 ... pin 64 ... engagement hole 65 ... sphere 66 ... flange 661 ... packing ring 67 ... bottom part 671 ... small diameter part 672 ... large diameter part 673 ... intermediate part 674 ... valve plate 7 ... Air adjusting part 71 ... Lower cap 711 ... Air circulation hole 712 ... O-ring 713 ... Countersunk screw 72 ... Adjusting screw part 7 DESCRIPTION OF SYMBOLS 1 ... Air flow path 722 ... Recessed part 73 ... Valve plate 731 ... Air distribution hole 74 ... Spacer 741 ... Cylindrical part 742 ... Flange 75 ... O-ring 10 ... Receiving hinge 11 ... Base 12 ... Blade board 13 ... Mounting hole 14 ... Projection 101 ... pillar 102 ... door

Claims (5)

A cylinder, an operating rod that is pivotably attached to one end of the cylinder and that is restricted from moving in the longitudinal direction, and is formed in a substantially V-shape at a position opposed to the outer peripheral surface of the operating rod in the cylinder. 1 cam groove, a first sphere that is engaged with and disposed at a position opposite to the first cam groove, and a first sphere that is engaged with the first sphere, A compression ring in which the movement and the movement in the longitudinal direction in the cylinder are interlocked, and a compression ring disposed between the compression ring and the upper end portion of the cylinder and biasing the compression ring toward the other end of the cylinder The first cam groove is formed in a substantially V shape so that the upper and lower ends are aligned with the coil spring and the outer peripheral surface of the operation rod in the cylinder, and the first cam groove is disposed below the first cam groove. The two cam grooves and the opposite position of the second cam groove A second sphere that is engaged with the piston, and a piston that is engaged with the second sphere, and the movement of the second sphere with respect to the second cam groove and the movement in the longitudinal direction within the cylinder are interlocked. And an air damper portion for gradually discharging the air on the other end side from the piston bottom portion in the cylinder in accordance with the movement of the piston to the other end side. 2. The automatic door hinge according to claim 1, wherein the substantially V-shaped first cam groove and the second cam groove at the opposed positions are continuously formed in a circumferential shape. The automatic door hinge according to claim 1 or 2, wherein a difference in height between the upper and lower ends of the second cam groove is longer than a difference in height between the upper and lower ends of the first cam groove. An air flow hole is provided in the bottom of the piston, and the air flow hole includes a large diameter portion on the other end side of the cylinder, a small diameter portion on one end side, and a valve plate between the large diameter portion and the small diameter portion, Is formed with a gap communicating with the large diameter portion from one end side to the other end side, and the small diameter portion can be closed. An automatic door hinge according to any one of claims 1 to 3, further comprising an adjusting screw portion capable of adjusting the size of the air flow path formed between the two by the strength of screwing. The automatic door hinge according to any one of claims 1 to 4 is installed on a door support or door, and a receiving hinge attached to the automatic door hinge is installed on the door or door support. Double door structure that can be opened and closed.

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