JP5198225B2 - Opening assist device - Google Patents

Description

  The present invention relates to a door opening assist device that applies a force in a door opening direction to a door at the beginning of opening.

With the recent increase in size and sealing performance of doors, there has been proposed a door opening assist device that applies a force in the opening direction to the door at the beginning of opening. For example, in the one described in Patent Document 1 below, a spring urges an arm in a door opening direction via a slider, and when the door is opened, the arm protrudes to apply a force in the door opening direction. .
JP 2001-107638 A

  However, since the arm that protrudes when the door is opened is returned to the original position by the motor, a separate return motor is required in addition to the parts such as the arm. Moreover, since it is the structure which arrange | positions a some switch and detects that the door opened by that, the arm protruded to the maximum, etc., a switch is also needed. And since it is the structure which uses a motor and a switch, there exists a problem that wiring construction is needed at the time of construction.

  Therefore, the present invention has been made in view of the above-described conventional problems, and the member for pushing the door in the door opening direction can be returned to the original state without using a motor. Therefore, wiring work at the time of construction is unnecessary. It is an object to provide a door opening assist device.

  The present invention has been made to solve the above problems, and the door opening assist device according to the present invention applies an opening direction force to the door up to a predetermined initial opening angle when the door starts to open. A door assist device that is movably attached to a door frame or door from a retracted position to an extruded position and pushes the door or door frame to apply a force in the door opening direction from the fully closed state to the initial opening angle. The pushing member that moves from the retracted position to the pushing position, the urging means that urges the pushing member toward the pushing position side by the accumulated force, and the opening of the door when the door is opened beyond the initial opening angle. A link mechanism portion that interlocks the push-out member with the moving operation to return the push-out member to the retracted position and stores the urging means, and the push-out member that has returned to the retracted position by the link mechanism portion is the push-out position. And a lock mechanism configured to lock the push-out member so as not to move and to release the lock when the door is fully closed and the door is held by the door frame. To do.

  In the door opening assist device having the above structure, the pushing member is moved to the pushing position by releasing the accumulated force by the urging means up to a predetermined initial opening angle at the initial stage of opening the door. Since a force in the opening direction is applied to the door, the door can be opened with a small force. Subsequently, when the door is opened beyond the initial opening angle, the link mechanism unit returns the push-out member to the retracted position and accumulates the urging means using the rotational operation. In addition, since the locking mechanism locks the push-out member returned by the link mechanism, for example, the push-out member does not move to the push-out position during the closing of the door, and the door is fully closed while the push-out member is returned to the retracted position. Can be closed to the state. When the door is fully closed and the door is held on the door frame by a latch or the like, the lock mechanism portion unlocks the pushing member for the next door opening operation.

The pushing member is rotatably attached to the door end side of the door frame, and the link mechanism portion includes a link bar that is connected to the pushing member and extends toward the door bottom side of the door frame, It is movable along the extending direction and the link bar moves to the door butt side so that the pushing member rotates to the pushing position, and the urging means urges the link bar to the door butt side, initial opening when opening the door or the angle, that is configured to move a predetermined portion of the door trailing side of the door with the contact with the door in the rotational motion to the link bar link bar door leading end side.

  According to this structure, a door can be efficiently extruded because an extrusion member is located in the door tip side of a door frame. In addition, since a predetermined part on the door bottom side of the door comes into contact with the link bar and moves it to the door tip side, the door turning operation is effectively converted into the movement of the link bar to return the pushing member. Can do.

The pusher member is pivotally attached to the door end of the door, the door closer is attached to the door butt side of the door, and the link mechanism is connected to the push member and extends toward the door butt side of the door. The link bar is movable along the extending direction of the link bar, and the link bar is moved to the door bottom side so that the push-out member rotates to the push-out position, and the biasing means is the link bar. When the door is opened beyond the initial opening angle, a member that rotates around the main axis of the door closer comes into contact with the link bar and moves the link bar to the door tip as the door rotates. that is configured to move to the side.

  According to this structure, a door can be efficiently extruded because an extrusion member is located in the door tip side of a door. In addition, since a member that rotates around the main axis of the door closer comes into contact with the link bar and moves it to the door end side, the door turning operation is effectively converted into movement of the link bar through the door closer and pushed out. The member can be returned.

Further, the link member is connected to the extrusion member, and the urging means is configured to urge the extrusion member via the link member, and the connection portion connecting the link member and the extrusion member is connected to the extrusion position. An evacuation path is provided for the moved extruding member to return to the storage position while the link member is stopped, and when the door is closed without further opening from the initial opening angle, the extruding member moves through the evacuation path. that is configured to return to the storage position using.

  According to this configuration, if the door is closed without being opened further than the initial opening angle, the pushing member returns to the storage position by the escape path. Therefore, when the door is not opened further than the initial opening angle, it is not necessary to return the pushing member to the retracted position against the urging means by the door.

  In this case, auxiliary urging means that urges the pushing member directly toward the pushing position without using a link member is provided, and the pushing member that has returned to the retracted position using the evacuation path is used during the next door opening operation. In the above, it is preferable that the auxiliary biasing means can be moved to the pushing position.

  As described above, when the pushing member returns through the evacuation path, the urging means is not stored, so the urging means moves the pushing member to the pushing position as usual during the next door opening operation. I can't let you. However, since the pushing position is moved to the pushing position by the auxiliary biasing means, the pushing member can be moved to the pushing position regardless of the manual operation. Accordingly, the biasing means is stored by the link mechanism by the further opening operation thereafter, and the push-out member is also restored, so that the force in the opening direction is applied to the door as usual at the next opening. Can do.

The lock mechanism portion, that are provided by the delay mechanism for unlocking a delay has been fully closed a predetermined time of the door. By providing the delay mechanism, it is not necessary to adjust and maintain the timing of holding the door by the door frame when fully closed.

  As described above, the door opening assist device according to the present invention restores the pushing member by the link mechanism and stores the biasing means, and the locking mechanism locks the pushing member. No means are required and no wiring work is required during construction.

  Hereinafter, a door opening assist device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a door opening assist device, showing a state in which the door is fully closed, FIG. 2 is an enlarged view of a main part, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 5 shows a state when the door is further opened from FIG. 4, FIG. 6 shows a state when the door is further opened from FIG. 5, and FIG. 7 shows a state when the door is being closed. Show.

  The door 1 is attached to the door frame 3 so as to rotate in the horizontal direction around the rotation shaft 2 in the vertical direction, and is held by the door frame 3 by the latch device in the fully closed state. That is, when the latch 4 of the door 1 is locked to the latch receiver 5 of the door frame 3, the door 1 is held in a fully closed state, and when the latch 4 is released from the latch receiver 5 by a rotation operation of a knob (not shown) or the like, the door. 1 can be opened in the door opening direction.

  The door opening assist device according to the present embodiment is attached to the door frame 3 side and is configured to push the door 1 when the door is opened. The pushing arm 10 is a pushing member, and the pushing arm 10 is energized. A coil spring 11 serving as an urging means for pushing out, a link mechanism for returning the pushing arm 10 and contracting and accumulating the coil spring 11, and a locking mechanism for locking the pushed pushing arm 10 are provided. This will be specifically described below.

  As shown in FIGS. 1 to 4, the door opening assist device includes a rectangular tube-like frame body 12 attached to the door frame 3, and the pushing arm 10 is rotatably attached to the frame body 12. . The pushing arm 10 is located on the door end side of the door frame 3 and is attached to the frame body 12 so as to rotate horizontally around the support shaft 9. In the position, the first arm 13 extending to the opposite side of the door 1 and the second arm 14 extending to the door butt substantially parallel to the door 1 are formed in an L shape in plan view. A roller 15 is attached to the tip of the second arm portion 14 and abuts against the door 1, and when the pushing arm 10 is opened to the pushing position as shown in FIG. 4, the second arm portion 14 is framed. 12 protrudes to the door 1 side and pushes out the door 1. In addition, a straight long hole 16 is formed along the extending direction of the first arm portion 13 on the distal end side of the first arm portion 13 of the pushing arm 10, and a connecting pin 17 passes through the long hole 16. Yes.

  And the pushing arm 10 is connected with the edge part by the side of the door end of the link bar 18 which comprises a link mechanism part with the connection pin 17. FIG. The link mechanism unit includes a link bar 18 housed in the frame body 12, and a pressing arm 19 attached to the door bottom side of the door 1 so as to be able to contact the end of the link bar 18 on the door bottom side. It has. The link bar 18 has a round bar shape, is parallel to the fully closed door 1, and can be translated by a predetermined distance along the extending direction (axial direction). A long hole 20 is formed linearly along the axial direction of the end of the link bar 18 on the door end side, and the connecting pin 17 is engaged with the long hole 20.

  A receiving plate 29 is attached to the end of the link bar 18 on the door butt side, and the coil spring 11 is disposed so as to press the end surface on the door tip side of the receiving plate 29 toward the door butt side. Specifically, the link bar 18 is inserted through the inside of the coil spring 11, and the push bar 10 is urged toward the push position by urging the link bar 18 toward the door bottom. A mechanism for adjusting the urging force of the coil spring 11, that is, the magnitude of the force applied to the door 1, is provided on the door end side of the coil spring 11. That is, a nut 21 is attached to the frame body 12, and a bolt 22 is inserted and screwed into the nut 21. A through hole is formed in the center of the bolt 22, and the link bar 18 passes through the bolt 22. A disk portion 22a is integrally formed at the end of the bolt 22 on the door end side, and a plurality of holes are formed radially on the outer peripheral surface, and the bolt 22 is linked by inserting the tip of the tool into the hole. By rotating around the axis of the bar 18, the coil spring 11 interposed between the door bottom end of the bolt 22 and the receiving plate 29 can be expanded and contracted. Further, the frame 12 is provided with a stopper 23 at a position separated from the receiving plate 29 of the link bar 18 by a predetermined distance toward the door butt side, and the receiving plate 29 of the link bar 18 contacts the stopper 23 as shown in FIG. When contact is made, the further movement of the link bar 18 toward the door bottom is prevented, and the rotation of the push-out arm 10 also stops at that position, that is, the push-out position. The opening angle of the door 1 shown in FIG. 4 is an initial opening angle, and the pushing arm 10 applies a force in the opening direction to the door 1 up to the opening angle. This initial opening angle is generally 10 degrees or less.

  The pressing arm 19 contacts the receiving plate 29 for the first time when the door 1 is further opened from the initial opening angle of FIG. The pressing arm 19 is attached to one surface of the door 1, that is, the surface with which the pushing arm 10 abuts via a bracket 24. The pressing arm 19 is supported by the bracket 24 at the base end portion so as to be rotatable in the horizontal direction, and a roller 25 is attached to the distal end portion thereof. The pressing arm 19 is urged clockwise in FIG. 1 by a spring (not shown), and is normally in contact with the regulating wall 24a of the bracket 24 and is in a standing posture substantially perpendicular to the door 1 in plan view. It rotates together with the door 1 while maintaining the standing posture. Then, when the door 1 is further opened from the state of FIG. 4, the pressing arm 19 abuts against the receiving plate 29 as shown in FIG. In this manner, the pressing arm 19 contacts the receiving plate 29 when the door 1 is opened beyond the initial opening angle, and then the link bar 18 is pressed while contacting the receiving plate 29 while the door 1 rotates by a predetermined angle. By moving to the door end side, the pushing arm 10 is returned to the original position and the coil spring 11 is compressed and stored. In the state of FIG. 5, the push arm 10 is slightly behind the retracted position, but immediately after this, when the pressing arm 19 is separated from the receiving plate 29, the link bar 18 is turned on as shown in FIG. Slightly moves to the door-end side to reach the storage position.

  Next, the lock mechanism unit will be described. As shown in FIG. 6, the lock mechanism is for locking the push-out arm 10 in the retracted position so as not to turn to the push-out position. Specifically, as shown in FIG. 3, a locking pin 30 is attached and fixed to the link bar 18 and protrudes downward from the link bar 18 by a predetermined amount. On the other hand, a lock pin 31 is supported on the frame body 12 so as to be freely retractable toward the door 1 side. The lock pin 31 is supported by an L-shaped bracket 32 in the frame body 12 and is also supported by the rear surface of the frame body 12 so that the lock pin 31 can move back and forth, and its front end is a predetermined amount forward from the front surface of the frame body 12. Protruding. Then, the lock pin 31 is urged by the spring 33 so as to protrude forward, but when the door 1 is fully closed, it is in a sunk state pushed backward by the door 1 as shown in FIG. A notch 34 is formed in the upper part of the center of the lock pin 31, and the rear side of the notch 34 has an inclined surface 35 as shown in FIG. When the door is further opened from the initial opening angle of FIG. 4, the locking pin 30 comes into contact with the inclined surface 35 of the lock pin 31 by the movement of the link bar 18 toward the door end side, and the locking pin 30 is inclined. By pushing 35, the lock pin 31 is moved rearward, and the locking pin 30 eventually passes through the notch 34 as shown in FIG. As shown in FIG. 6, even if the link bar 18 tries to move to the door bottom side by the coil spring 11, the locking pin 30 comes into contact with the side surface of the lock pin 31 on the door tip side, so that the link bar 18 is positioned at that position. Thus, the push-out arm 10 is also locked in the retracted position. After that, as shown in FIGS. 1 and 2, when the door 1 returns to the fully closed state and is held by the door frame 3 by the latch device, the lock of the link bar 18 is released by the door 1 pushing the lock pin 31 backward. Then, the link bar 18 moves to the door bottom side by the stroke of the long hole 20, and the accumulated force of the coil spring 11 is transmitted to the pushing arm 10 through the link bar 18. As shown in FIG. 7, the roller 25 of the pressing arm 19 slightly contacts the edge of the receiving plate 29 in the middle of closing the door, but the pressing arm 19 rotates counterclockwise in the drawing against the biasing force of the spring. Thus, interference with the receiving plate 29 is avoided.

  In the door opening assist device configured as described above, the push arm 10 is returned by the link mechanism and the coil spring 11 is compressed and stored, and is held in that state by the lock mechanism. Electric parts such as a motor and a switch are not necessary, and wiring work at the time of construction is also unnecessary. Further, when the door is fully closed, the lock pin 31 is automatically pushed and the lock is released. Therefore, when the door 1 is opened next time, the pushing arm 10 again applies a force in the door opening direction to the door 1. can do. In addition, since the pushing arm 10 is returned using the pivoting motion of the door 1 beyond the initial opening angle and the coil spring 11 is compressed, there is no need to perform a special operation for returning the pushing arm 10 or the like. . In particular, since the pressing arm 19 is provided on the door bottom side, the strong coil spring 11 can be easily compressed.

  The configuration of the pushing arm 10 can be variously changed. For example, the pushing arm 10 can be rotated in the reverse direction as shown in FIG. The pushing arm 10 shown in FIG. 8 is linear, and rotates counterclockwise from the storage position shown in FIG. 8A to the pushing position shown in FIG. 8B. In the above embodiment, the receiving plate 29 is in contact with the stopper 23, but the pushing arm 10 may be in contact with the stopper 23 as shown in FIG. FIG. 8C shows a locked state in which the link bar 18 is pushed to the door end side and the locking pin 30 of the link bar 18 is locked by the lock pin 31 as in the above embodiment.

  In the above description, the configuration in which the pushing arm 10 is attached to the door frame 3 side has been described. However, the pushing arm 10 may be provided on the door 1 side, and referring to FIGS. Although the description will be given, the same components as those described above will be denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

  As shown in FIGS. 9 to 12, the push arm 10 is rotatably attached to the door 1, and the roller 15 at the tip of the second arm portion 14 pushes the door frame 3, and the reaction opens to open the door 1. It is the structure which gives the force of a direction. As shown in FIG. 11, the first arm portion 13 of the push-out arm 10 is bifurcated up and down, and a link bar 18 is inserted therebetween. A straight elongated hole 16 is formed in the first arm portion 13 of the pushing arm 10 in the same manner as described above. Further, an arc-shaped elongated hole 40 extends from one end of the linear elongated hole 16. It is installed. The arc-shaped elongated hole 40 is an arc centered on the support shaft 9 of the push-out arm 10 and functions as an evacuation path as will be described later. Further, a torsion spring 41 as auxiliary urging means is attached to the support shaft 9 of the pushing arm 10, and the torsion spring 41 pushes the pushing arm 10 with an urging force smaller than a closing force of a door closer described later. Is energized. The urging force of the torsion spring 41 is smaller than that of the coil spring 11 as the main urging means, and the torsion spring 41 directly urges the pushing arm 10 toward the pushing position without passing through the link bar 18.

  On the other hand, a receiving plate 29 is provided at the end of the link bar 18 on the door butt side, but the end surface on the door butt side of the receiving plate 29 is not a flat surface orthogonal to the link bar 18 as described above. The cam surface 29a is formed. Further, a door closer main body 50 is attached to the door 1, and a link mechanism portion is attached to the link 52 attached to the main shaft 51 of the door closer main body 50 and rotating around the main shaft 51 in conjunction with the rotation operation of the door 1. A pressing arm 19 is attached so as to be rotatable in the horizontal direction. The link 52 is formed with a restriction wall 24a as in the bracket 24 described above, and the pressing arm 19 is also urged by a spring (not shown) so as to rotate clockwise toward the restriction wall 24a. Further, when the pressing arm 19 comes into contact with the restriction wall 24a, further rotation is prevented.

  When the door 1 starts to be opened from the fully closed state, as shown in FIG. 12, the pushing arm 10 rotates to the pushing position, and a force in the opening direction is applied to the door 1 up to the initial opening angle. As shown in FIG. 12, when the locking pin 30 abuts on the U-shaped stopper 23, the link bar 18 and the pushing arm 10 stop moving. In this state, the pressing arm 19 comes into contact with the cam surface 29 a of the receiving plate 29.

  When the door 1 is subsequently rotated further, the pressing arm 19 is rotated counterclockwise together with the main shaft 51 of the door closer, and the link bar 18 is moved to the door tip while the pressing arm 19 travels on the cam surface 29a. The coil spring 11 is compressed by moving to the side, and the pushing arm 10 is returned to the retracted position as shown in FIG. Similarly, since the state is held by the lock pin 31, the push-out arm 10 remains locked in the retracted position when the door 1 is further opened from the state shown in FIG.

  On the other hand, if the door 1 is not opened any more from the initial opening angle state shown in FIG. 12, the arc-shaped long hole 40 is formed in the pushing arm 10 as an evacuation path. Even if it is in a stopped state without moving to, the pushing arm 10 is pushed by the closing door 1 and can be returned to the retracted position as shown in FIG. That is, since the connecting pin 17 can move from the linear elongated hole 16 to the arc-shaped elongated hole 40, the pushing arm 10 rotates independently of the link bar 18 and returns to the original retracted position. To do. Since the arc-shaped long hole 40 is formed as an evacuation path in this way, it becomes unnecessary to forcefully push the pushing arm 10 by the door 1 to compress the coil spring 11, and only the pushing arm 10 is used to close the door closer. Can be automatically restored. This can prevent the door 1 from being left open at the initial opening angle.

  In the state of FIG. 14, the door 1 is in the fully closed state, but the link bar 18 has moved to the door bottom side, and the coil spring 11 is also in the extended state and is not stored. Therefore, when the door 1 is opened next time, no force in the door opening direction from the pushing arm 10 is applied. However, since the torsion spring 41 is provided, the pushing arm 10 automatically turns to the pushing position as shown in FIG. 15 without manually turning the pushing arm 10 to the pushing position. Thereafter, when the door 1 is further opened, the pressing arm 19 moves the link bar 18 toward the door tip as usual, so that the coil spring 11 is also energized and the pushing arm 10 returns to the retracted position in conjunction with the link bar 18.

  When the pushing arm 10 is provided with auxiliary biasing means such as a torsion spring 41, a tooth portion is formed on the pushing arm 10, and a gear with a damper that meshes with the tooth portion is provided on the frame body 12. You may make it 10 rotate to an extrusion position slowly.

  In the above embodiment, the lock mechanism may further include a delay mechanism. For example, when the frame body 12 is attached to the door frame 3, a bifurcated plate 60 is attached to the distal end side of the lock pin 31 as shown in FIGS. 16 to 18, and a movable body 61 is provided on one side of the bifurcated plate 60. The movable body 61 is biased by the spring 62 so as to protrude toward the door 1 side. A damper 63 is attached to the frame body 12, and the other side of the bifurcated plate 60 is brought into contact with the damper 63.

  First, as shown in FIG. 16, in the middle of closing the door, the door 1 is not in contact with the movable body 61 of the lock pin 31, and the movable body 61 protrudes toward the door 1 by the spring 62. The locking pin 30 is locked to the lock pin 31 and is in a locked state. Thereafter, when the door 1 is fully closed as shown in FIG. 17, the movable body 61 is pushed in by the door 1 and the spring 62 is compressed, but the bifurcated plate 60 is supported by the damper 63 and maintains its position. When the door 1 is fully closed, the latch 4 is engaged with the latch receiver 5 and the door 1 is held by the door frame 3, but the bifurcated plate 60 is gradually pushed in by the elastic restoration of the spring 62, and the lock pin As shown in FIG. 18, the locking pin 30 is positioned at the notch 34 and the lock by the lock pin 31 is released.

  As described above, the delay mechanism portion having the spring 62 and the damper 63 causes the lock pin 31 to release the lock of the link bar 18 and the push-out arm 10 with a predetermined time delay after the door 1 is fully closed. Sometimes, the latch 4 is securely locked to the latch receiver 5, and it is not necessary to adjust the protruding amount and the mounting position of the lock pin 31 with high accuracy in accordance with the timing of the latch 4.

  In the above-described embodiment, the pressing arm 19 has been described as a rotating type. However, the pressing arm 19 may be configured as a fixed type that does not rotate. However, it is preferable that the pressing arm 19 is of a rotating type because the pressing arm 19 can rotate in a configuration in which the pressing arm 19 abuts against the receiving plate 29 in the middle of closing the door to avoid interference therewith. The pressing arm 19 may be configured not to contact the receiving plate 29 when the door is closed.

  Further, although the rollers 15 and 25 are provided on the pressing arm 19 and the pushing arm 10, the rollers 15 and 25 may be omitted. Moreover, the structure which abbreviate | omits the press arm 19 itself and the door 1 contact | abuts directly to the receiving plate 29 and the link bar 18 may be sufficient. Similarly, the door closer link 52 may directly contact the receiving plate 29 or the link bar 18. Furthermore, a cam surface may be provided on the pressing arm 19 side, and a roller or the like may be provided on the link bar 18 side as a cam follower.

  Furthermore, although the pushing arm 10 or the like is attached to the frame body 12 and the frame body 12 is attached to the door 1 or the door frame 3, it may be attached directly to the door 1 or the like without using the frame body 12.

  Further, in the configuration in which the pushing arm 10 is attached to the door frame 3 as shown in FIGS. 1 and 8, an evacuation path as described above may be provided, or an auxiliary urging means may be provided. Even when the door does not open more than the angle, the pushing arm 10 can be automatically returned to the retracted position by the closing force of the door closer.

It is a top view of the door opening assistance apparatus in one Embodiment of this invention, Comprising: The door has shown the state of full closure. The principal part enlarged view of the door opening assistance apparatus. AA sectional drawing of FIG. It is a top view of the door opening assistance apparatus, Comprising: The door has shown the state opened to the initial opening angle. It is a top view of the door opening assistance apparatus, Comprising: The door further opens from FIG. 4, The link bar has shown the state located most on the door-end side. FIG. 6 is a plan view of the door opening assist device, showing a state in which the door is further opened from FIG. 5 and the pushing arm and the link bar are locked to the lock mechanism. It is a top view of the door opening assistance apparatus, Comprising: The state in the middle of a door closing is shown. It is a principal part enlarged view of the door opening assistance apparatus in other embodiment of this invention, Comprising: (a) is a fully closed state, (b) is a state when a door opens to an initial opening angle, (c). Shows the state in which the push arm and the link bar are locked to the lock mechanism. It is a top view of the door opening assistance apparatus in other embodiment of this invention, Comprising: The door has shown the state of full closure. The principal part enlarged view of the door opening assistance apparatus. BB sectional drawing of FIG. It is a top view of the door opening assistance apparatus, Comprising: The door has shown the state opened to the initial opening angle. FIG. 13 is a plan view of the door opening assist device, showing a state in which the door is further opened from FIG. 12 and the pushing arm and the link bar are locked to the lock mechanism. It is a top view of the door opening assistance apparatus, Comprising: The state when fully closing without opening a door further from the initial opening angle of FIG. 12 is shown. It is a top view of the door opening assistance apparatus, Comprising: The state when the door is opened from FIG. 14 is shown. (A) which shows the door opening assistance apparatus in other embodiment of this invention is principal part sectional drawing (b) is a principal part bottom view, Comprising: The state just before a door closes is shown. (A) which shows the door opening assistance apparatus in other embodiment of this invention is principal part sectional drawing (b), is a principal part bottom view, Comprising: The state at the moment when a door closed is shown. (A) which shows the door opening assistance apparatus in other embodiment of this invention is principal part sectional drawing (b) is a principal part bottom view, Comprising: The state after fixed time progress is shown, after a door closed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 2 Rotating shaft 3 Door frame 4 Latch 5 Latch receiver 9 Support shaft 10 Extrusion arm (extrusion member)
11 Coil spring (biasing means)
12 Frame 13 First Arm 14 Second Arm 15 Roller 16 Long Hole 17 Connecting Pin 18 Link Bar (Link Member, Link Mechanism)
19 Pressing arm (link mechanism)
20 Long hole 21 Nut 22 Bolt 22a Disk part 23 Stopper 24 Bracket 24a Restriction wall 25 Roller 29 Receiving plate 29a Cam surface 30 Locking pin (lock mechanism part)
31 Lock pin (lock mechanism)
32 Bracket 33 Spring 34 Notch 35 Inclined surface 40 Long hole (evacuation route)
41 Torsion spring (auxiliary biasing means)
50 Main body 51 of door closer 51 Main shaft 52 Link 60 Forked plate 61 Movable body (delay mechanism)
62 Spring (delay mechanism)
63 Damper (delay mechanism)

Claims (5)

A door opening assist device that applies a force in the door opening direction to the door to a predetermined initial opening angle when starting to open the door,
It is attached to the door frame or door so that it can move from the storage position to the push-out position. The pushing member that moves, the urging means that urges the pushing member to the pushing position side by the accumulated force, and the pushing member is interlocked with the turning operation of the door when the door is opened beyond the initial opening angle. A link mechanism for returning the pushing member to the retracted position and storing the urging means, and locking the pushing member so that the pushing member returned to the retracted position by the link mechanism does not move to the pushing position. comprising a the door the door is fully closed is held in a door frame and a lock mechanism configured to release the lock, pushing member on the door leading end side of the door frame The link mechanism portion is provided with a link bar that is connected to the push-out member and extends toward the door bottom side of the door frame, and the link bar is movable along the extending direction. The pushing member rotates to the pushing position by moving to the door butt side, and the urging means urges the link bar to the door butt side, and when the door is opened beyond the initial opening angle, A door opening assist device configured to move a link bar toward a door tip side in accordance with a turning operation of the door by contacting a predetermined portion on the door bottom side with the link bar . A door opening assist device that applies a force in the door opening direction to the door to a predetermined initial opening angle when starting to open the door,
It is attached to the door frame or door so that it can move from the storage position to the push-out position. The pushing member that moves, the urging means that urges the pushing member to the pushing position side by the accumulated force, and the pushing member is interlocked with the turning operation of the door when the door is opened beyond the initial opening angle. A link mechanism for returning the pushing member to the retracted position and storing the urging means, and locking the pushing member so that the pushing member returned to the retracted position by the link mechanism does not move to the pushing position. door and a lock mechanism for the door becomes fully closed state is arranged to release the lock by holding a door frame, the extrusion member is rotating in the door leading end side of the door The door closer is attached to the door butt side of the door, and the link mechanism is provided with a link bar that is connected to the pushing member and extends toward the door butt side of the door, the link bar extending in the extending direction. When the link bar moves to the door butt side, the pushing member rotates to the pushing position, and the urging means urges the link bar to the door butt side, and the initial opening angle is When the door is opened as described above, the member that rotates around the main axis of the door closer comes into contact with the link bar and is configured to move the link bar to the door end side in accordance with the rotation operation of the door. The door opening assist device. A door opening assist device that applies a force in the door opening direction to the door to a predetermined initial opening angle when starting to open the door,
It is attached to the door frame or door so that it can move from the storage position to the push-out position. The pushing member that moves, the urging means that urges the pushing member to the pushing position side by the accumulated force, and the pushing member is interlocked with the turning operation of the door when the door is opened beyond the initial opening angle. A link mechanism for returning the pushing member to the retracted position and storing the urging means, and locking the pushing member so that the pushing member returned to the retracted position by the link mechanism does not move to the pushing position. comprising a the door the door is fully closed is held in a door frame and a lock mechanism configured to release the lock, communicating the link member to the extrusion member The urging means is configured to urge the pushing member via the link member, and the pushing member that has moved to the pushing position is connected to the connecting portion that connects the linking member and the pushing member. An evacuation path is provided to return to the storage position while stopped, and when the door is closed without opening further than the initial opening angle, the pushing member can return to the storage position using the evacuation path. It is comprised in the door opening assistance apparatus characterized by the above-mentioned. Auxiliary urging means that urges the pushing member directly toward the pushing position without using a link member is provided, and the pushing member that has returned to the retracted position using the evacuation path is assisted during the next door opening operation. 4. The door opening assist device according to claim 3 , wherein the door opening assist device is configured to be moved to the pushing position by the biasing means. A door opening assist device that applies a force in the door opening direction to the door to a predetermined initial opening angle when starting to open the door,
It is attached to the door frame or door so that it can move from the storage position to the push-out position. The pushing member that moves, the urging means that urges the pushing member to the pushing position side by the accumulated force, and the pushing member is interlocked with the turning operation of the door when the door is opened beyond the initial opening angle. A link mechanism for returning the pushing member to the retracted position and storing the urging means, and locking the pushing member so that the pushing member returned to the retracted position by the link mechanism does not move to the pushing position. comprising a the door the door is fully closed is held in a door frame and a lock mechanism configured to release the lock, the locking mechanism is fully closed office doors Door opening assisting apparatus characterized by comprising a delay mechanism for unlocking a delay time.

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