JP2022070517A - Door closure assist apparatus - Google Patents

Abstract

To allow a position of an engaging member of a trigger to be easily adjusted in three dimension directions in a door closure assist apparatus that assists a closing operation of a door by engaging a retracting arm of an apparatus body attached to a door frame and one of rotating doors and a trigger attached to another.SOLUTION: A support member 40 in which a base member 34 attached to a door as a trigger so as to adjust a horizontal direction position, a slide member 35 attached to the base member 34 so as to move in a vertical direction, and a trigger shaft (engagement member) 33 engaged with a retracting arm of an apparatus body are fixed adapts a trigger body 36 assembled to an attachment member 39 attached to the slide member 35 so as to move in a longitudinal direction, thereby easily adjusting a position of the trigger shaft 33 with respect to the door in three-dimensional directions.SELECTED DRAWING: Figure 15

Description

The present invention relates to a door closing assisting device that assists a door closing operation by pulling the door to a door frame in the process of closing a rotary door provided at an entrance / exit of a building or a room.

In recent years, there have been an increasing number of cases where door closers that can slowly and automatically close open doors are installed for rotary (hinge type) doors that open and close openings such as entrances and exits of buildings and rooms. There is. A commonly known door closer connects the upper frame of a door frame and the upper end of the door with a connecting arm, and controls the opening and closing operation of the door by the action of a spring and hydraulic pressure. However, when such a door closer is installed, the opening and closing of the door often feels heavy, and the hinge that supports the door is constantly loaded, so abnormal noise from the hinge mounting part when opening and closing the door and Problems such as broken hinges may occur.

On the other hand, in Patent Document 1 and the like, the door frame is composed of a device main body attached to one of the door frame and a door rotatably provided for the door frame, and a trigger attached to the other, and the door is closed. At that time, a door closing assist device has been proposed in which the pull-in arm of the main body of the device engaged with the trigger rotates in the process to pull the door toward the door frame.

Unlike the door closer described above, the door closing assist device having the above configuration does not have a connecting arm connecting the door frame and the door, and controls the movement of the door only in the area where the door is close to the closing position to some extent. It has become like. Therefore, if the opened door is manually closed to some extent, the door can be closed slowly and automatically from that point, and the door can be opened and closed relatively lightly because the entire opening and closing operation of the door is not controlled. In addition, since the load on the hinge is small, abnormal noise when opening and closing the door and damage to the hinge are unlikely to occur.

Japanese Unexamined Patent Publication No. 2010-95979

By the way, in the door closing assist device of Patent Document 1, the device main body is fixedly attached to the upper frame of the door frame and the trigger is fixedly attached to the upper end portion of the door, and the trigger shaft provided on the trigger is attached to the device main body. By engaging with the engaging groove of the retractable arm provided, the opening / closing operation of the door is controlled.

However, the trigger shaft is retracted due to the dimensional error of the door frame and door, the dimensional error of each part of the door closing assist device, the error of the mounting position of the device body to the door frame, the error of the mounting position of the trigger to the door, etc. It may not be possible to engage smoothly with the engagement groove of the door. In such a case, remove the once installed trigger or device body, and adjust the mounting position of the trigger or device body until smooth engagement between the trigger shaft and the engagement groove of the retractable arm is obtained. It takes a lot of time and effort to make adjustments.

Therefore, the present invention is a door that assists the closing operation of the door by engaging the pull-in arm of the apparatus main body attached to one of the door frame and the rotary door with the engaging member of the trigger attached to the other. In the closing assist device, it is an object to make it possible to easily adjust the position of the engaging member of the trigger in the three-dimensional direction.

In order to solve the above problems, the present invention comprises a door frame, a device main body attached to one of the doors rotatably provided with respect to the door frame, and a trigger attached to the other. The device body comprises a body case and a retractable arm that is rotatably supported by the body case and engages with the trigger, and when the door is closed, it engages with the trigger in the process. In the door closing assist device in which the door is pulled toward the door frame by rotating the pull-in arm of the device main body, the trigger is attached to the door frame or the door so that the position in the left-right direction can be adjusted. , A slide member that is movably attached to the base member in the vertical direction, and a trigger body that is fixed to the engaging member that engages with the retractable arm of the device body and is movably attached to the slide member in the front-rear direction. The configuration is.

According to the above configuration, it is fixed to the trigger body by combining the left-right position adjustment of the trigger base member, the vertical position adjustment of the slide member with respect to the base member, and the front-back direction position adjustment of the trigger body with respect to the slide member. The position of the engaging member that engages with the retractable arm of the device body can be easily adjusted in the three-dimensional direction.

Here, as a specific configuration of the trigger, as the base member of the trigger, one having a horizontally elongated hole extending in the left-right direction and being attached to the door frame or the door with a trigger fixing screw passed through the horizontally elongated hole is adopted. Then, the mounting position of the base member on the door frame or the door can be adjusted in the left-right direction simply by loosening the trigger fixing screw.

Further, regarding the slide member, one of the base member and the slide member of the trigger is provided with a vertically elongated hole extending in the vertical direction, and the other is provided with a through hole overlapping the vertically elongated hole, and is passed through the vertically elongated hole and the through hole. The position of the slide member is set to the base member by adopting a configuration in which the slide member is attached to the base member by the vertical adjustment screw and the vertical adjustment nut fixed to the peripheral edge of the through hole and screwed to the vertical adjustment screw. Can be adjusted in the vertical direction.

The trigger body of the trigger is held by a mounting member that is immovably attached to the slide member in the front-rear direction, a support member to which the engagement member is fixed, and the attachment member that is immovable and rotatably held in the front-rear direction. The support member is provided with a front-rear adjusting screw that is screw-coupled to the support member, and the support member can be adjusted in the front-rear direction with respect to the slide member so that the support member moves in the front-rear direction by rotation of the front-rear adjustment screw. be able to.

As described above, the door closing assist device of the present invention makes it possible to easily adjust the position of the engaging member of the trigger that engages with the retractable arm of the device body in the three-dimensional direction. Even if there is a problem with the engagement between the trigger engagement member and the retractable arm when the trigger is installed, the engagement member and the retractable arm can be smoothly engaged by simply adjusting the position of the trigger engagement member. Can be corrected to.

A perspective view from below showing the installation state of the door closing assist device of the embodiment. Cross-sectional plan view of the door closing assist device of FIG. 1 (state in the middle of closing the door) An exploded perspective view of the main body of the device of FIG. (A) is a perspective view of the assembled state of the retractable arm of FIG. 3, and (b) is a sectional view taken along the line IV-IV of (a). A cross-sectional plan view showing an enlarged main part of the main body of the apparatus of FIG. A cross-sectional plan view showing a state in which the retractable arm is rotated in the retractable direction corresponding to FIG. A cross-sectional plan view showing a state of the door closing assisting device when the door is closed corresponding to FIG. A cross-sectional plan view illustrating a method of adjusting the pressing force of the arm pressing spring of FIG. FIG. 8 is a perspective view from below showing the pressing force adjusting operation of the arm pressing spring. (A) and (b) are explanatory views of the operation when the door is closed when the pull-in arm is in the pull-in position, respectively. Sectional drawing along the XI-XI line of FIG. Sectional drawing along line XII-XII of FIG. An exploded perspective view of the trigger shown in FIG. 1 as viewed from the front side. An exploded perspective view of the main part of the trigger in FIG. 13 as viewed from the rear side. An exploded perspective view of the trigger shown in FIG. 13 as viewed from the rear side while being assembled. (A) is a front view when the trigger is in the standard position of FIG. 1, and (b) and (c) explain a method of adjusting the position of the trigger shaft in the left-right direction and the up-down direction from the state of (a), respectively. Front view A cross-sectional view illustrating a method of adjusting the position of the trigger shaft in the front-rear direction corresponding to FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, this door closing assist device is installed for a hinged door D that opens and closes the doorway of a room in a house, and is installed on the upper frame of a door frame F provided on the periphery of the doorway. It includes a device main body 1 to be attached and a trigger 31 attached to an upper end portion of a door D rotatably provided on one vertical frame of the door frame F via a hinge (not shown). The door frame F is provided with a portion having no door stop S in the upper corner on the opposite side of the hinge, and the device main body 1 can be attached to this portion. Further, in the following description, the side of the door frame F facing the other vertical frame of the door frame F is defined as one end side, and the opposite side thereof is defined as the other end side.

As shown in FIGS. 2 and 3, the device main body 1 is rotatably supported by a horizontally long main body case 2 composed of a metal upper case 2a and a lower case 2b, and the main body case 2, and will be described later. It is provided with a retractable arm 3 that can be engaged with the trigger 31, an urging mechanism 4 that urges the retractable arm 3 in its rotation surface, and a braking mechanism 5 that brakes the rotation of the retractable arm 3.

The main body case 2 contains parts such as a pull-in arm 3, an urging mechanism 4, and a braking mechanism 5, and the upper case 2a and the lower case 2b are integrated by a plurality of case fixing screws 6. Then, a plurality of case mounting screws 7 (a plurality of case mounting screws 7) penetrating the entire case in a posture in which the longitudinal direction is parallel to the upper frame of the door frame F and the retractable arm 3 is retracted from the opening on the front surface (the surface facing the closed door D). It is attached to the lower surface of the upper frame of the door frame F by (not shown in FIG. 3). The case fixing screw 6 is screwed into the tubular casing spacer 8 fixed to the lower case 2b from the upper surface side of the upper case 2a, and the case mounting screw 7 is a cylindrical shape arranged between the upper and lower cases 2a and 2b. It is screwed into the upper stile of the door frame F while being passed through the spacer 9 for mounting screws. Further, a notch continuous with the opening on the front surface is formed on the lower surface of the main body case 2 in the same shape as the upper surface, and when the door D is closed, the retracting arm 3 partially forms a part of the trigger 31 on the lower surface of the main body case 2. It can be pulled down to the bottom of the main body case 2 without interfering with the case 2.

As shown in FIGS. 4A and 4B, the retractable arm 3 has an arm body 10 whose base end side is rotatably supported by the main body case 2 and which engages with the trigger 31 on the tip side, and an arm. It is composed of a slide piece 11 having a triangular shape in a plan view and which is attached to the tip end side of the main body 10, and a slide piece pressing spring 12 that urges the slide piece 11 to the base end side of the arm main body 10. The arm body 10 and the slide piece 11 are made of resin.

The tip end side portion of the arm main body 10 is provided with a slide piece guide portion 10a that guides the movement of the slide piece 11 along the arm main body 10 in a flat plate shape having a substantially trapezoidal shape in a plan view on one side in the width direction. Further, the slide piece guide portion 10a is provided with a spring pocket 10b extending in the longitudinal direction of the arm body 10 and accommodating the slide piece pressing spring 12.

The slide piece 11 is opened at the center position in the vertical direction on the side surface facing the center side in the width direction and the side surface facing the proximal end side of the arm body 10, and a part of the slide piece guide portion 10a is inserted into the plan view triangle. It has a shaped slit 11a and a spring holding hole 11b extending from a side surface (slit closing surface) facing the tip end side of the arm body 10 to a position overlapping the spring pocket 10b. When assembling the slide piece 11 to the arm body 10, the slide piece pressing spring 12 is arranged in the spring pocket 10b of the arm body 10, and then the slide piece 11 is provided with a slit 11a on the side of the arm body 10. It may be pushed in while being elastically deformed from the position facing the slide piece guide portion 10a until the slide piece pressing spring 12 is held by the spring holding hole 11b.

The slide piece 11 assembled to the arm body 10 is pressed against the bottom surface of the spring holding hole 11b by the slide piece pressing spring 12 to be urged toward the base end side of the arm body 10, and the wall of the slit closing surface is the slide piece. It comes into contact with the guide portion 10a and is restricted from moving toward the base end side of the arm body 10. As a result, when the slide piece 11 receives a force in the direction of compressing the slide piece pressing spring 12, the slide piece 11 is guided by the slide piece pressing spring 12 and the slide piece guide portion 10a and slides toward the tip end side of the arm body 10. (See FIGS. 10 (a) and 10 (b)).

By assembling the slide piece 11, the retractable arm 3 is formed with an engaging groove 3a for engaging with the trigger 31 on the lower surface side of the tip end side portion of the arm main body 10. The engaging groove 3a has a straight portion whose one end opens at the tip of the retractable arm 3 and extends in the longitudinal direction, and an introduction portion which opens from the other end side of the straight portion to the front side of the retractable arm 3.

On the other hand, the base end side portion of the arm main body 10 supports a rotating shaft portion 10c rotatably inserted into the rotating shaft hole 2c of the main body case 2 and both ends of the pressure receiving pins 13 arranged in the vertical direction. A pair of upper and lower connecting portions 10d and connecting portions 10e that support both ends of the connecting pins 14 similarly arranged in the vertical direction are provided.

The rotation around the rotation shaft portion 10c of the arm main body 10 is performed by the stopper 2d protruding inward from the upper and lower surfaces of the main body case 2 and the casing spacer 8 near one end (left end in FIG. 2) of the main body case 2. The retractable arm 3 is rotatable between the standby position corresponding to the open state of the door D and the retractable position corresponding to the closed state of the door D. The stopper 2d abuts on the same side as the tip side that extends long with respect to the rotation center of the arm body 10 in order to make the arm body 10 less likely to bend. Further, an annular groove is formed around the rotating shaft portion 10c, and an inwardly annular convex portion formed by burring the peripheral edge portion of the rotating shaft hole 2c is fitted into the annular groove. The lubricant (not shown) is held so that the retractable arm 3 can rotate stably.

The pressure receiving portion 10d of the arm body 10 receives pressing force from the urging mechanism 4 via the pressure receiving pin 13 and the pressure receiving roller 15 slidably fitted in the axial center portion thereof. .. Further, the connecting portion 10e is connected to the braking mechanism 5 by an oval-shaped joint metal fitting 16 through which the connecting pin 14 and its axially central portion are passed through a hole on one side.

The urging mechanism 4 holds an arm pressing spring 17 (which generates an urging force along the longitudinal direction) arranged along the longitudinal direction of the main body case 2 and both ends of the arm pressing spring 17, respectively. The first spring case 18 and the second spring case 19 are provided with a cam member 20 that abuts on the second spring case 19 on the side opposite to the arm pressing spring 17, and the arm pressing spring 17 holds the first spring case 18. By pressing the pressure receiving roller 15 attached to the pull-in arm 3 via the pull-in arm 3, the pull-in arm 3 is urged in the rotating surface thereof.

In the first spring case 18, one end of the arm pressing spring 17 is inserted into the spring insertion hole 18a provided on the surface facing the second spring case 19, and the retracting arm is formed by the pressing surface 18b provided on the opposite side. It is in contact with the pressure receiving roller 15 of 3. On the other hand, in the second spring case 19, the other end of the arm pressing spring 17 is inserted into the spring insertion hole 19a provided on the surface facing the first spring case 18, and the inclined cam surface provided on the opposite side thereof. It is in contact with the cam member 20 at 19b. The inclined cam surface 19b of the second spring case 19 is formed so as to be inclined with respect to the longitudinal direction of the main body case 2 in a plan view. Further, in both spring cases 18 and 19, the band-shaped protrusions 18c and 19c formed on the upper and lower surfaces thereof are slidably fitted into the upper and lower guide grooves 2e1 and 2e2 extending in the longitudinal direction of the main body case 2, respectively. ing.

The cam member 20 has an inclined cam surface 20a that is in sliding contact with the inclined cam surface 19b of the second spring case 19, and rectangular plate-shaped protrusions 20b formed on the upper and lower surfaces are respectively in the width direction of the main body case 2. It is slidably fitted in the upper and lower guide grooves 2f extending to. Then, the spring adjusting screw 21 that penetrates the cam member 20 in the front-rear direction (the width direction of the main body case 2) is rotatably housed in the hollow portion that opens on the surface of the cam member 20 opposite to the inclined cam surface 20a. It is screwed to the adjusting nut 22. The tip of the spring adjusting screw 21 abuts on the outer peripheral surface of the above-mentioned mounting screw spacer 9 arranged near the other end of the apparatus main body 1, and the short side of the screw holder 23 whose head is L-shaped in a plan view. It is housed in the main body case 2 in a state of being passed through the portion, and can be rotated from the outside in the width direction of the main body case 2 through a hole formed in the front surface of the main body case 2.

The braking mechanism 5 includes a linearly moving damper 24 arranged along the longitudinal direction of the main body case 2, a damper holder 25 for holding the tubular portion 24a of the damper 24 so as to be movable in the axial direction, and a shaft of the damper 24. It is provided with a side view U-shaped damper cap 26 that engages with the tip of the portion 24b, and a cushioning spring 27 that is arranged between the bottom surface of the tubular portion 24a of the damper 24 and the damper holder 25. The damper 24 brakes the rotation of the retractable arm 3 via the damper cap 26 and the joint fitting 16. The damper 24 is used in which the resistance when the shaft portion 24b is immersed in the tubular portion 24a and the resistance when the shaft portion 24b is projected are adjusted to substantially the same level.

The damper holder 25 includes a base end portion 25a through which the spacer 9 for mounting screws is passed, and upper and lower arm portions 25b extending from the base end portion 25a in parallel with the damper 24 and sandwiching the tubular portion 24a of the damper 24. The base end portion 25a is provided with a hole in the side wall facing the cam member 20 to bring the tip end portion of the spring adjusting screw 21 into contact with the mounting screw spacer 9. Then, the protrusions 25c formed on the upper surface of the upper arm portion 25b and the lower surface of the lower arm portion 25b are fitted into the positioning holes 2g of the main body case 2, so that the entire damper holder 25 is positioned. ing.

The damper cap 26 has an engaging hole 26a into which the tip end portion of the shaft portion 24b of the damper 24 is inserted. Further, a plurality of protrusions 26b formed on the upper and lower surfaces thereof are slidably fitted in the upper and lower guide grooves 2h extending in the longitudinal direction of the main body case 2, respectively. Then, the connecting pin 28 penetrates the upper and lower arms of the U-shape, and the axially central portion of the connecting pin 28 is passed through the hole on the other side of the joint fitting 16 described above, whereby the damper cap 26 is passed. Is connected to the retractable arm 3. Both ends of the connecting pin 28 protruding from the upper and lower surfaces of the damper cap 26 between the protrusions 26b are formed to have a small diameter so as to fit in the guide groove 2h of the main body case 2.

The device main body 1 of this door closing assisting device has the above configuration, and as shown in FIGS. 1 and 2, one end surface of the main body case 2 has a slight gap in the upper end portion of the other vertical frame of the door frame F. The retractable arm 3 is attached to the upper stile of the door frame F in a posture in which the retractable arm 3 appears and disappears toward the door D.

On the other hand, as shown in FIGS. 1 and 2, the trigger 31 includes a cover 32 and a trigger shaft 33 projecting from the upper surface of the cover 32, and when the door D is in a region close to the closed position to some extent. , The trigger shaft 33 is attached to the upper end portion of the door D opposite to the hinge of the door D so as to engage with the engagement groove 3a formed in the retractable arm 3 of the apparatus main body 1.

Next, the operation of this door closing assisting device will be described. First, as shown in FIG. 1, when the door D is opened and the retractable arm 3 of the apparatus main body 1 is not engaged with the trigger 31, the retractable arm 3 is in the standby position (in a state of being pulled out from the main body case 2). ) It is held. As shown in FIG. 5, the pull-in arm 3 is held in this way because the pressure receiving roller 15 of the pull-in arm 3 and the pressing surface 18b of the first spring case 18 of the urging mechanism 4 rotate the pull-in arm 3. A straight line (a straight line extending parallel to the urging direction of the arm pressing spring 17 from the rotation center O) A, which is a set of thought points of the urging mechanism 4 with respect to the moving center O, is above the drawing (with the braking mechanism 5 of the pull-in arm 3). The pull-in arm 3 is abutted on the connecting side), and a counterclockwise moment is applied by the urging force from the urging mechanism 4, and the counterclockwise rotation is restricted by the stopper 2d of the main body case 2. (See FIG. 2).

Then, when the opened door D is rotated in the closing direction, the trigger shaft 33 of the trigger 31 comes into contact with the tip of the retractable arm 3 of the apparatus main body 1 as shown in FIG. 2 in the process (1). The portion enters the straight portion of the engaging groove 3a). At this time, the tip of the pull-in arm 3 is pressed by the trigger shaft 33 and slightly rotated clockwise, and the contact point between the pressure receiving roller 15 of the pull-in arm 3 and the first spring case 18 of the urging mechanism 4 becomes. Overcome the thought point (straight line A) of the urging mechanism 4.

Then, the holding of the retractable arm 3 in the standby position is released, and as shown in FIG. 6, the first spring case 18 is moved to one end side of the device main body 1 by the urging force of the arm pressing spring 17 of the urging mechanism 4. At the same time as moving, the retractable arm 3 rotates clockwise (retracting direction). Along with this, the trigger shaft 33 moves (pulls in) relative to the back side of the straight line portion of the engagement groove 3a of the pull-in arm 3, so that the door D automatically rotates around the hinge integrally with the trigger 31. It moves and is drawn to the door frame F. After that, as shown in FIG. 7, the pull-in arm 3 comes into contact with the casing spacer 8 at the pull-in position in the main body case 2 and stops, and the door D also stops at the closed position.

Here, the rotation of the retractable arm 3 from the standby position to the retractable position is braked by the action of the braking mechanism 5 connected to the connecting portion 10e of the retractable arm 3. That is, when the retractable arm 3 rotates clockwise from the standby position, the connecting portion 10e of the retracting arm 3 passes through the connecting pin 14 and the joint metal fitting 16, and the damper cap 26 of the braking mechanism 5 and the shaft portion 24b of the damper 24 The rotation of the retractable arm 3 is decelerated due to the resistance of the shaft portion 24b of the damper 24 to the immersion of the shaft portion 24a into the tubular portion 24a. As a result, even when a strong force in the closing direction is applied to the door D by human hands or the like, the door D closes slowly and does not generate an impact sound when it comes into contact with the door stop S of the door frame F. ing.

Moreover, in this door closing assist device, even if the force applied to the door D in the closing direction is small, the retracting arm 3 is surely retracted when the trigger shaft 33 comes into contact with the tip of the retracting arm 3. It is designed to rotate to.

That is, as shown in FIG. 5, the pressing surface 18b of the first spring case 18, which is the contact portion of the urging mechanism 4 with the retracting arm 3, is the arm holding surface 18b1 orthogonal to the urging direction of the urging mechanism 4. And an inclined surface 18b2 that is continuous with the arm holding surface 18b1 and is inclined in a direction away from the rotation center O of the retracting arm 3, and is in contact with the pressure receiving roller 15 of the retracting arm 3 that is in the standby position on the arm holding surface 18b1. It is formed so as to be in contact with each other and the thought point (straight line A) of the urging mechanism 4 is located in the middle of the inclined surface 18b2. Therefore, in the process of closing the door D, when the trigger 31 comes into contact with the pull-in arm 3 in the standby position and the pull-in arm 3 is slightly rotated, the pressure receiving roller 15 immediately causes the inclined surface of the first spring case 18. It comes into contact with 18b2, and the resistance to the rotation of the pull-in arm 3 becomes small. As a result, the contact point between the pressure receiving roller 15 and the first spring case 18 is a thought point (straight line) as compared with the case where the contact surface with the pull-in arm of the urging mechanism is formed only on the surface orthogonal to the urging direction. It is easier to get over A).

Further, in the braking mechanism 5 for braking the rotation of the retractable arm 3, a space is provided on the right side of the tubular portion 24a of the damper 24, and the cushioning spring 27 is arranged in the space to rotate the retractable arm 3 in the retractable direction. At the beginning of the movement, the braking action of the damper 24 hardly occurs, and the retracting arm 3 is braked by the cushioning spring 27 so as to brake the axial movement of the damper cap 26 and the damper 24 pushed by the connecting portion 10e of the retracting arm 3. The rotation resistance of the is reduced.

Therefore, even if a force such that the trigger shaft 33 lightly contacts the retractable arm 3 is applied to the open door D, the holding of the retractable arm 3 in the standby position is released, and the retractable arm 3 is moved in the retractable direction. The door D can be closed reliably and smoothly by rotation.

Then, when the door D in the closed state is opened as shown in FIG. 7, the operation is the reverse of the above-mentioned closing operation. That is, when the closed door D is rotated in the opening direction, the trigger shaft 33 moves relative to the tip end side of the linear portion of the engaging groove 3a of the retracting arm 3, so that the retracting arm 3 rotates counterclockwise. I will do it. After that, the pull-in arm 3 comes into contact with the stopper 2d at the standby position and stops, and is held by the urging mechanism 4 in that state. When the retractable arm 3 is stopped, the trigger shaft 33 is disengaged from the engaging groove 3a of the retractable arm 3, and the door D is independently rotated and released from the retractable arm 3.

Further, in this embodiment, as shown in FIGS. 8 and 9, the spring adjusting screw 21 of the urging mechanism 4 is inserted through the hole on the front side of the main body case 2 with the hand driver while the device main body 1 is attached to the door frame F. The urging force of the urging mechanism 4 can be adjusted by rotating with H (the arrow in FIG. 8 indicates the adjusting operation in the direction of increasing the urging force).

That is, the spring adjusting screw 21 is held by the front wall of the main body case 2 and the spacer 9 for mounting screws so as not to be movable in the axial direction, and the adjusting nut 22 screwed to the spring adjusting screw 21 is turned to the cam member 20. Since it is stored immovably, when the spring adjusting screw 21 is rotated, the adjusting nut 22 and the cam member 20 are integrally moved in the axial direction of the spring adjusting screw 21 (the width direction of the main body case 2). At the same time, the second spring case 19 having the inclined cam surface 19b that is in sliding contact with the inclined cam surface 20a of the cam member 20 moves in the longitudinal direction of the main body case 2. As a result, the amount of compression of the arm pressing spring 17 changes, and the urging force of the urging mechanism 4 is adjusted.

Then, by rotating the spring adjusting screw 21 to adjust the urging force of the urging mechanism 4 as described above, the closing operation of the door D is reliably assisted regardless of the weight of the door D, and It is possible to prevent the door D from feeling too heavy when it is opened.

Moreover, in this door closing assist device, the spring adjusting screw 21 is provided so as to extend in the width direction of the horizontally long case body 2, and the rotation operation thereof is performed from the front side of the door frame F with the door D open. Since this can be done, it is easier to adjust the urging force than when the spring adjusting screw provided so as to extend in the longitudinal direction of the case body is rotated from a direction parallel to the upper frame of the door frame.

Further, in this door closing assist device, when the door D is opened, the retractable arm 3 is normally held in the standby position, but the retractable arm 3 that has been erroneously received some force rotates and is in the retractable position. Even if the door D is held in the door D, the door D can be normally closed as shown below.

That is, when the door D is open and the retracting arm 3 is in the retracting position, when the door D is closed, the trigger shaft 33 of the trigger 31 that rotates integrally with the door D is cut on the lower surface of the main body case 2. From the notch position, as shown in FIG. 10 (a), it enters the introduction portion of the engaging groove 3a of the pull-in arm 3 and comes into contact with the slide piece 11, and then the slide piece is pressed as shown in FIG. 10 (b). While sliding the slide piece 11 toward the tip end side of the retracting arm 3 against the elastic force of the spring 12, it enters the straight portion of the engaging groove 3a. Then, when the entire trigger shaft 33 enters the straight portion of the engaging groove 3a, the slide piece 11 returns to the original position by the elastic force of the slide piece pressing spring 12 (state in FIG. 7), and the door D is in the same manner as usual. It will be closed.

Next, the detailed structure of the trigger 31 and the method of adjusting the position of the trigger shaft 33 will be described. As shown in FIGS. 11 and 12 (the above-mentioned cover 32 is omitted), the trigger 31 includes a base member 34 attached to the door D, a slide member 35 attached to the base member 34, and the apparatus main body 1 as described above. The trigger shaft 33 as an engaging member that engages with the pull-in arm 3 of the above is fixed, and the trigger main body 36 is attached to the slide member 35.

As shown in FIGS. 13 and 15, the base member 34 is a plate-shaped member formed in a substantially U-shape in front view, and is laterally left and right on both the left and right sides of a rectangular notch 34a opening on the upper side thereof. An elongated horizontally elongated hole 34b is formed, and a vertically elongated hole 34c extending in the vertical direction is formed below the notch 34a. Further, both the left and right edge and the lower edge have a bent edge portion that bends toward the rear surface, and the rear surface has a plurality of vertical ribs 34d having a height lower than that of the bent edge portion, and each horizontally elongated hole 34b. An annular protrusion 34e is provided that protrudes from the peripheral edge at substantially the same height as the bent edge portion. A notch 34f for engaging with a protrusion (not shown) of the cover 32 is formed on the lower edge portion.

The slide member 35 is a metal plate having a front view shape corresponding to the base member 34, having a thickness within the difference between the heights of the left and right sides and the lower edge portion of the base member 34 and the height of the ribs 34d, and is left and right. A substantially rectangular window 35a into which the annular protrusion 34e on the rear surface side of the base member 34 enters is opened on both side portions. Then, it is incorporated in the rear surface side of the base member 34 and can be moved in the vertical direction by being guided by the left and right bent edges and ribs 34d of the base member 34. It is prevented from coming off in the vertical direction.

The central portion in the width direction of the slide member 35 is a step portion slightly protruding toward the front surface between the two ribs 34d extending downward from the lower edge of the notch 34a of the base member 34, and the base member 34. A through hole 35b is formed so as to overlap the vertically elongated hole 34c of the above. Then, the vertical adjustment nut 37 is fixed to the through hole 35b from the rear surface side, and the vertical adjustment screw 38 is vertically elongated from the front surface side of the base member 34 with the slide member 35 incorporated in the rear surface side of the base member 34. The slide member 35 is attached to the base member 34 so as to be adjustable in the vertical direction by passing it through 34c and screwing it to the vertical adjusting nut 37.

Further, on the left and right sides of the slide member 35, a mounting piece 35c that slightly protrudes toward the front side at the edge of a substantially rectangular notch in the center in the width direction and a handle that extends from the notch toward the window 35a. A stop groove 35d is formed, and the trigger main body 36 can be detachably attached to the attachment piece 35c and the locking groove 35d as described later.

As shown in FIG. 14, the trigger body 36 has a mounting member 39 attached to the slide member 35, a support member 40 to which the trigger shaft 33 is fixed, and a support member 40 held by the mounting member 39 and screw-coupled to the support member 40. It is provided with a front-rear adjusting screw 41, and an upper lid 42 and an inner lid 43 for the support member 40.

The mounting member 39 of the trigger body 36 is a substantially U-shaped resin member that opens forward in a plan view and downward in a front view. A horizontal guide groove 39a for guiding the support member 40 is provided on the inner side surfaces of the left and right arm portions, and a mounting piece 35c of the slide member 35 is provided on both side surfaces of the base end portion connecting both arm portions. Each mounting groove 39b is formed, and a locking piece 39c to be fitted into the locking groove 35d of the slide member 35 is provided at the lower end of each mounting groove 39b. Further, the base end portion holds the head of the front-rear adjusting screw 41 in a recess 39d that opens downward and front-back so as not to be movable in the front-rear direction and rotatably, and the front-rear adjusting screw 41 is rotated from the rear surface side. It can be operated. Further, on the upper surfaces of both arms, a band-shaped protrusion 39e for preventing the support member 40 from coming off forward is provided, as will be described later.

On the other hand, the support member 40 of the trigger body 36 has a shape in which the entire support member 40 is fitted inside the mounting member 39 except for the rectangular plate-shaped front portion, and is slidable on both side surfaces thereof in the guide grooves 39a of the mounting member 39. A guide portion 40a to be fitted is provided, and a screw hole 40b into which the front-rear adjusting screw 41 is screwed is formed in the rear end surface. Further, a vertical through hole 40c for fixing the trigger shaft 33 is provided in the central portion, and a screw hole 40d for fixing the upper lid 42 and the inner lid 43 is provided on the upper surface of the rear end portion.

The upper lid 42 and the inner lid 43 are substantially rectangular flat plate-shaped members, respectively, and have holes for passing the trigger shaft 33 and the lid fixing screw 44, as well as protrusions 42a protruding laterally from the rear end portion. 43a is provided.

The trigger shaft 33 is composed of a shaft main body 45 which is a resin tubular member, a core metal 46 inserted into the shaft main body 45, and a tubular trigger shaft spacer 47 fitted to the outer periphery of the lower half of the shaft main body 45. Become. The shaft body 45 is formed with a plurality of slits 45a extending in the axial direction from the lower end surface, and an annular protrusion 45b is provided on the inner peripheral surface of the lower end portion so as to be orthogonal to the slit 45a. Then, by press-fitting the core metal 46 from the upper end side of the shaft body 45, the lower end portion of the shaft body 45 is once expanded in diameter, and then the annular protrusion 45b is provided at the lower end portion of the core metal 46. The shaft body 45 and the core metal 46 are integrated by being fitted into the shaft body 45. Further, a flange portion 45c for preventing the shaft main body 45 from coming off from the trigger shaft spacer 47 is provided at the central portion in the axial direction of the shaft main body 45.

In this embodiment, the shaft body is provided with a slit at the lower end portion so that the core metal can be easily inserted and fixed, but the outer surface can be made vertically symmetrical by eliminating the slit. If the shape is vertically symmetrical, the workability of inserting and fixing the core metal is slightly inferior, but it is possible to prevent mistakes in assembly in the vertical direction during assembly, and it can be reused by turning it upside down when a problem occurs due to aging deterioration. ..

Further, the spacer 47 for the trigger shaft moves the trigger shaft 33 engaged with the pull-in arm 3 to the left, right, front and back so that the trigger shaft 33 surely pulls out the pull-in arm 3 to the standby position when the door D is opened. It plays a role in suppressing shaking. If the spacer 47 for the trigger shaft is made of resin, the friction with the trigger shaft 33 is smaller than that of the spacer 47 made of metal, and the trigger shaft 33 rotates freely and smoothly engages with the retractable arm 3. It is preferable because it becomes like this.

To assemble the trigger body 36, first, the support member 40 is fitted into the mounting member 39 from the front side while the head of the front / rear adjusting screw 41 is held in the recess 39d of the mounting member 39, and the front / rear adjusting screw 41 is rotated. Then, it is screw-coupled to the screw hole 40b of the support member 40. After that, the trigger shaft 33 is inserted into the through hole 40c of the support member 40 from above. At this time, the trigger shaft 33 has the lower end surface of the trigger shaft spacer 47 in contact with the stepped portion formed on the inner circumference near the lower end of the through hole 40c, and the flange portion 45c of the shaft body 45 is the trigger shaft spacer 47. It is prevented from coming off by contacting the upper end surface. Then, the inner lid 43 and the upper lid 42 may be covered in order, and the lid fixing screw 44 may be screwed into the screw hole 40d of the support member 40 from the upper surface side of the upper lid 42.

Further, when the trigger body 36 assembled in this manner is attached to the slide member 35, the rear end portion of the trigger body 36 is arranged above the center portion in the width direction of the slide member 35 as shown in FIG. The mounting member 39 is pushed into the slide member 35 while being elastically deformed, the mounting piece 35c of the slide member 35 enters the mounting groove 39b of the mounting member 39, and the locking piece 39c of the mounting member 39 is the locking groove of the slide member 35. It may be fitted into 35d. As a result, the trigger body 36 is detachably attached to the slide member 35.

The trigger 31 of this door closing assist device has the above configuration, and the end surface of the bent edge portion of the base member 34 is brought into contact with the door D in a state where the base member 34, the slide member 35, and the trigger main body 36 are integrated. Then, by passing the trigger fixing screw 48 from the front side through the horizontally elongated hole 34b of the base member 34 and the window 35a of the slide member 35 and screwing it into the door D, the entire body except the cover 32 is attached to the door D. Then, after this attachment work, the cover 32 that covers the front surface side is locked by using the notch 34f provided in the bent edge portion on the lower side of the base member 34.

As described below, the trigger 31 can adjust the position of the trigger shaft 33 in the three-dimensional direction while being attached to the door D (with the cover 32 removed).

That is, as shown in FIG. 16A, when the trigger 31 is attached to the door D in the standard position, if the two trigger fixing screws 48 are loosened, the entire trigger 31 becomes the oblong hole 34b of the base member 34. It is possible to move in the left-right direction with respect to the door D within the range of the length dimension. FIG. 16 (b) shows a state when the entire trigger 31 is moved to the left from the state of FIG. 16 (a). By loosening the trigger fixing screw 48 and moving the entire trigger 31 in the left-right direction and then tightening the trigger fixing screw 48 again, the position of the trigger shaft 33 in the left-right direction can be adjusted.

Further, if the vertical adjustment screw 38 is loosened from the state shown in FIG. 16A, the slide member 35 can move in the vertical direction with respect to the base member 34 integrally with the trigger main body 36. FIG. 16 (c) shows a state when the slide member 35 and the trigger main body 36 are moved upward from the state of FIG. 16 (a). By loosening the vertical adjusting screw 38 and moving the slide member 35 and the trigger body 36 in the vertical direction and then tightening the vertical adjusting screw 38 again, the vertical position of the trigger shaft 33 can be adjusted. At the time of this vertical adjustment, the slide member 35 is guided by the left and right bending edges of the base member 34 and moves in the vertical direction, so that the position shift of the trigger shaft 33 in the horizontal direction can be almost caused. not.

On the other hand, when adjusting the position of the trigger shaft 33 in the front-rear direction, first, the trigger body 36 is removed from the slide member 35. In this removal work, contrary to the above-mentioned mounting work, the locking piece 39c of the mounting member 39 is disengaged from the locking groove 35d of the slide member 35, and the mounting piece 35c of the slide member 35 is ejected from the mounting groove 39b of the mounting member 39. As described above, the mounting member 39 may be pulled up while being elastically deformed. Then, as shown in FIG. 17, the front / rear adjusting screw 41 is rotated by the hand driver H from the rear surface side of the removed trigger main body 36. Then, since the front-rear adjustment screw 41 is held by the mounting member 39 so as not to be movable in the axial direction, the support member 40 screwed to the front-rear adjustment screw 41 moves in the axial direction, that is, in the front-rear direction of the front-rear adjustment screw 41. The arrow in FIG. 17 indicates an adjustment operation in the direction of retracting the support member 40). After changing the position of the trigger shaft 33 fixed to the support member 40 in the front-rear direction with respect to the mounting member 39, the trigger body 36 is attached to the slide member 35 again to adjust the position of the trigger shaft 33 in the front-rear direction. can do.

Even if the front-rear adjusting screw 41 is mistakenly excessively rotated when the trigger shaft 33 is moved forward, the screw connection between the support member 40 and the front-rear adjusting screw 41 is not released. The protrusions 42a and 43a on both sides of the upper lid 42 and the inner lid 43 come into contact with the strip-shaped protrusions 39e on the upper part of the mounting member 39, respectively, and the support member 40 stops. There is no dropout of 41.

As described above, this door closing assisting device includes a base member 34 that is attached to the door D so as to be adjustable in the left-right direction as a trigger 31, and a slide member 35 that is attached to the base member 34 so as to be movable in the vertical direction. Since the trigger shaft 33 that engages with the retractable arm 3 of the main body 1 is fixed and consists of the trigger main body 36 that is movably attached to the slide member 35 in the front-rear direction, the position of the trigger shaft 33 with respect to the door D is tertiary. It can be easily adjusted in the original direction.

Therefore, even if a problem occurs in the engagement between the trigger shaft 33 and the retractable arm 3 when the device main body 1 is installed on the door frame F and the trigger 31 is installed on the door D, only a simple position adjustment of the trigger shaft 33 is required. , The trigger shaft 33 and the retractable arm 3 can be corrected so as to be smoothly engaged with each other.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

For example, in the above-described embodiment, the device main body is installed in the door frame and the trigger is installed in the door, but conversely, the device main body may be installed in the door and the trigger may be installed in the door frame.

Further, in the trigger, in the embodiment, a vertically elongated hole is provided in the base member for vertical adjustment, and a through hole is provided in the slide member so as to overlap the vertically elongated hole. However, the arrangement of the vertically elongated hole and the through hole may be reversed. ..

1 Device body 2 Body case 3 Pull-in arm 3a Engagement groove 4 Basis mechanism 5 Braking mechanism 10 Arm body 31 Trigger 33 Trigger shaft (engagement member)
34 Base member 34b Horizontal hole 34c Vertical hole 35 Slide member 35b Through hole 36 Trigger body 37 Vertical adjustment nut 38 Vertical adjustment screw 39 Mounting member 40 Support member 41 Front and rear adjustment screw 48 Trigger fixing screw D Door F Door frame S Door stop

Claims (4)

It consists of a door frame, a device main body attached to one of the doors rotatably provided with respect to the door frame, and a trigger attached to the other, and the device main body is attached to the main body case and the main body case. It is provided with a retractable arm that is rotatably supported and engages with the trigger, and when the door is closed, the retractable arm of the device body engaged with the trigger rotates in the process, thereby In the door closing assist device that draws the door to the door frame,
The trigger engages with a base member that is adjustablely attached to the door frame or door in the left-right direction, a slide member that is vertically movable to the base member, and a retractable arm of the apparatus body. A door closing assisting device comprising a trigger body to which a member is fixed and attached to the slide member so as to be movable in the front-rear direction. The door closing assist according to claim 1, wherein the base member of the trigger has a horizontally elongated hole extending in the left-right direction, and is attached to the door frame or the door by a trigger fixing screw passed through the horizontally elongated hole. Device. One of the base member and the slide member of the trigger is provided with a vertically elongated hole extending in the vertical direction, and the other is provided with a through hole overlapping the vertically elongated hole. The door closing assisting device according to claim 1 or 2, wherein the slide member is attached to a base member by a vertical adjusting nut fixed to a peripheral edge of a hole and screwed to a vertical adjusting screw. The trigger body of the trigger is held by a mounting member that is immovably attached to the slide member in the front-rear direction, a support member to which the engagement member is fixed, and the mounting member that is immovably and rotatably held in the front-rear direction. 6. Door closing assistance device.

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