JP4898228B2 - Close assist device - Google Patents

Description

  The present invention relates to a closing assist device that assists in closing and completes closing immediately before closing, and is particularly suitable for a door having airtightness in which packing is provided between the door and the door frame.

  A packing may be provided between the door frame and a door that can be freely opened and closed with respect to the door frame so as to eliminate a gap between the two when the door is closed and to improve airtightness and sound insulation. In this type of highly airtight door, the packing is sandwiched between the door and the door frame immediately before closing. When the door that contacts the packing is further closed, the packing is deformed by a predetermined amount, and the latch bolt can be locked to the strike of the door frame. Therefore, the closing power immediately before closing is larger than that of a normal door by the amount of deformation of the packing. In order to make it possible to close the door against a large closing force, for example, there is a door for a prefabricated refrigerator in which a large latch lever is provided and the door is closed while contributing an inertial force. In addition, in doors and the like that enhance sound insulation in theaters and halls, etc., the rotary handle with a tapered surface is locked while being rotated to a locking part provided on the door frame side, so that the door can be moved by the amount of displacement of the tapered surface. There is also what pushes it to the door frame side.

  However, a highly airtight door that performs a closing operation using inertial force requires a large closing operation force, and has a problem in that an impact at the time of closing increases and noise is generated. In addition, a highly airtight door that obtains a pressing force with a rotary handle has a problem in that the door closing operation direction and the handle rotating operation direction are different, so that the door closing operability is deteriorated.

  The present invention has been made in view of the above circumstances, and provides a closing assist device that can save the door closing operation force and does not require the door closing operation force in different directions. The purpose is to reduce impact and improve operability.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The closing assist device according to claim 1 of the present invention includes a latch, a detection means, an actuator, and a strike.
The detection means detects that the door has moved to the position before it completely closed,
A latch that rotates by an actuator protrudes from the door and enters the strike, and pushes the inner wall of the strike to assist the closing power of the door.

  In this closing assist device, when the door is closed and moved to a position before it is completely closed, the detecting means detects this. By this detection, the latch protrudes from the door by the actuator, pushes the inner wall of the strike, assists the closing power of the door, and brings the door into close contact with the door frame. Thereby, the door closing operation force that is increased by pressing the packing during the closing operation is greatly reduced.

The closing assisting device 100 according to claim 2 includes a housing 11 disposed on the door 71, and
An electric actuator 15 provided in the housing 11 and driven by a signal input from the outside of the housing;
A latch 45 that protrudes from the housing 11 along an arcuate movement locus by an actuation force generated by driving of the electric actuator 15, and draws the strike 75 of the door frame 73;
It is characterized by comprising.

  In the closing assisting device 100, when the door 71 is closed and immediately before closing, the latch 45 protrudes from the door 71 with an arcuate movement trajectory by the operating force obtained by driving the electric actuator 15, and its tip is the door. The door frame 73 is attracted by engaging with the strike 75 of the frame 73. That is, the door 71 is relatively urged to close toward the door frame. Thereby, the door closing operation force that is increased by pressing the packing 77 at the time of closing is greatly reduced.

The closing assisting device 100 according to claim 3 includes biasing means 39a, 39b in which a biasing force is accumulated by driving the electric actuator 15,
A pressing lever 41 that is swung by the urging force of the urging means 39a and 39b and causes the latch 45 to protrude along an arcuate movement locus;
A latching claw 43 for restricting the swinging of the pressing lever 41;
Detection means for detecting the proximity to the door frame 73 when the door is closed;
A release lever 67 that is actuated by proximity detection information by the detection means and releases the rocking restriction of the pressing lever 41 of the latching claw 43;
It is characterized by comprising.

  In the closing assist device 100, when the detection means obtains the proximity detection information to the door frame 73 when the door is closed, the release lever 67 is actuated to restrict the swing of the pressing lever 41. The locking of the claw 43 is released. As a result, the accumulated urging force is applied to the latch 45 via the pressing lever 41.

  The closing assisting device 100 according to claim 4 is characterized in that the detecting means is a trigger 63 that moves backward by contact with the door frame 73 when the door is closed and operates the release lever 67 in the swing restriction release direction. To do.

  In the closing assist device 100, when the door 71 is closed and approaches the door frame 73, the trigger 63 contacts the door frame 73 and moves backward. Along with this backward movement, the release lever 67 is operated, and the latching of the latching claw 43 that restricts the swinging of the pressing lever 41 is released. That is, the approach to the door frame 73 when the door is closed can be configured only by a simple mechanism composed of mechanical elements.

The closing assisting device 200 according to claim 5 includes a housing 91 attached to a surface 71a on the closing direction side of the door 71;
Detecting means 113 for detecting the proximity to the door frame 73 when the door is closed;
An electric actuator 15 provided in the housing 91 and driven by a signal input from the detection means 113;
A latch 101 that protrudes from the housing 91 in an arcuate movement locus by driving the electric actuator 15 and draws the door frame 73;
It is characterized by comprising.

  In the closing assist device 200, when the door 71 is closed and immediately before closing, the latch 101 protrudes from the door 71 with an arcuate movement trajectory by the operating force obtained by driving the electric actuator 15, and its tip is the door. The door frame 73 is drawn by engaging with the frame 73. That is, the door 71 is relatively urged to close toward the door frame. Thereby, the door closing operation force that is increased by pressing the packing 77 at the time of closing is greatly reduced.

  The closing assisting device 200 according to claim 6 is characterized in that the detecting means is a proximity sensor 113 that detects a predetermined distance between the door 71 and the door frame 73.

  In this closing assist device 200, the detection means for detecting the proximity of the door 71 and the door frame 73 is from an electrical proximity sensor 113, such as a magnetic detection sensor, which is different from a trigger mechanism or the like composed of mechanical elements. As a result, it is possible to configure detection means that does not expose the movable part.

  According to the closing assist device of the first aspect of the present invention, the actuator is actuated by detecting the position before the door is completely closed by the detecting means, and the latch protrudes from the door, and at the same time, the inner wall of the strike is pushed. Assist the door closing power and bring the door into close contact with the door frame. Thereby, it is possible to save the door closing operation force that is increased by pressing the packing when the door is closed. In addition, since the door closing operation force is greatly reduced, it is not necessary to close the door by contributing an inertial force, and the impact at the time of closing the door can be reduced.

  According to the closing assisting device according to claim 2, the electric actuator driven by the signal input from the outside of the housing, and the latch that protrudes in the arc-shaped movement locus by the operating force by the driving of the electric actuator and draws the strike of the door frame Since the latch attracts the strike immediately before the door is closed, the door closing operation force that is increased by pressing the packing when the door is closed can be saved. In addition, since the door closing operation force is greatly reduced, it is not necessary to close the door by contributing an inertial force, and the impact at the time of closing the door can be reduced. Furthermore, since the door closing operation force in different directions is unnecessary, the operability when the door is closed can be improved.

  According to the closing assist device of the third aspect, the urging force is accumulated by driving the electric actuator, and the accumulated urging force is released by the proximity detection information of the detecting means and applied to the latch via the pressing lever. Therefore, the latch can be operated by a mechanism comprising mechanical elements, and the reliability of the closing assist operation can be improved.

  According to the closing assisting device of the fourth aspect, since the detecting means is a trigger that moves backward by the contact with the door frame when the door is closed and operates the release lever in the swing regulation releasing direction. Only a simple mechanism consisting of elements can be used, and the start of the latch can be controlled with high reliability.

  According to the closing assist device of the fifth aspect, the detecting means for detecting the proximity to the door frame when the door is closed, the electric actuator driven by the signal input from the detecting means, and the arcuate shape by the driving of the electric actuator. Because it has a latch that protrudes along the movement trajectory and pulls the door frame, just before the door closes, the latch pulls the door frame, saving the door closing operation force that increases by pressing the packing when closing the door. be able to. In addition, since the door closing operation force is greatly reduced, it is not necessary to close the door by contributing an inertial force, and the impact at the time of closing the door can be reduced.

  According to the closing assist device of the sixth aspect, since the detection means is a proximity sensor that detects a predetermined distance between the door and the door frame, the movable part can be touched without exposing the movable part. It is possible to prevent malfunction due to.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a closing assist device according to the present invention will be described in detail with reference to the drawings.
1 is a side view of a closing assisting device according to the present invention, FIG. 2 is a horizontal sectional view of a retracting latch portion of the closing assisting device shown in FIG. 1, and FIG. 3 is an exploded view of the closing assisting device shown in FIG. FIG.
In the closing assist device 100 according to the present embodiment, a housing 11 is built in the end of a door (not shown). The housing 11 is provided with a front panel 13, and the front panel 13 is disposed so as to be exposed at the door of the door. A motor 15 that is an electric actuator is provided inside the housing 11, and the motor 15 is driven by a signal input from the outside of the housing. In the present embodiment, a proximity sensor (not shown) is provided on the door, and the motor 15 is driven to rotate by door frame proximity detection information detected by the proximity sensor. In addition, the signal from the outside may be, for example, a remote control signal from the central control room.

  The motor 15 rotates the worm 19 of the output shaft via the speed reducer 17. The worm 19 is engaged with a gear 25 a of a rotating plate 25 via a first gear 21 and a second gear 23. That is, the rotating plate 25 is rotated via the worm 19, the first gear 21, and the second gear 23 by driving the motor 15. The rotating plate 25 has a pair of convex pieces 27 and 27 projecting radially outward on a concentric circumference. A limit switch 29 is provided in the vicinity of the rotary plate 25, and the convex pieces 27 and 27 press the actuator of the limit switch 29 at a predetermined rotation angle of the rotary plate 25.

  A pair of engagement pins 31, 31 that are at both ends in the diametrical direction are provided on the plate surface of the rotary plate 25 in the same direction as the rotary shaft. A spring compression lever 33 is rotatably provided in the vicinity of the rotary plate 25, and the spring compression lever 33 swings with its proximal end engaged with the engagement pins 31, 31. A connecting bar 35 is provided on the distal end side of the spring compression lever 33 so as to be movable in the left-right direction in FIG. A spring cover 37 is externally attached to one end of the connecting bar 35. Between the spring cover 37 and the connecting bar 35, a first spring 39a and a second spring 39b which are urging means are disposed coaxially.

  The spring compression lever 33 swings to move the spring cover 37 to the right in FIG. The spring cover 37 is moved rightward in FIG. 1 to compress the first spring 39a and the second spring 39b provided therein. The connecting bar 35 is linked to the pressing lever 41 at the tip. The pressing lever 41 is rotatably supported by the housing 11, and a step 41 a on the outer periphery of the base is hooked by a hooking claw 43. The pressing lever 41 is restricted from rotating clockwise in FIG. 1 by the step 41 a being hooked by the hooking claws 43. Thereby, the urging force accumulated by the compression of the first spring 39a and the second spring 39b is held in a state where the connecting bar 35 is pressed rightward.

  As for the press lever 41, the front-end | tip 41b contact | abuts to the drawing latch 45 as a latch. As shown in FIG. 2, the retractable latch 45 engages a rotating shaft 45 a with a long hole 49 formed in the plate portion 47 in the housing 11. In addition, a slide pin 45 b is suspended from the retracting latch 45, and the slide pin 45 b is engaged with a substantially U-shaped guide groove 51 that is curved in the middle of the plate portion 47. A roller 53 is provided at the base of the retracting latch 45 so as to be rotatable about a shaft 45c. The pressing lever 41 has a tip 41 b in contact with the roller 53 through a U-shaped member 55.

  When the pressing lever 41 is rotated clockwise as shown in FIG. 1, the tip 41b presses the roller 53 of the retracting latch 45 via the U-shaped member 55. As a result, the retracting latch 45 has a rotating shaft 45a with a long hole. 2 so that the slide pin 45b moves in the guide groove 51 around the rotation shaft 45a when the rotation shaft 45a reaches the right end of the long hole 49. Is projected from the housing 11 in an arcuate movement trajectory counterclockwise.

  A stopper lever 57 is provided in the vicinity of the rotary plate 25, and the stopper lever 57 engages and holds the spring compression lever 33 in a compressed state with the first spring 39a and the second spring 39b. The stopper lever 57 holding the spring compression lever 33 releases the holding by the clockwise rotation of the pressing lever 41 in FIG.

  The pull-in latch 45 is urged by a helical spring 59 in a direction in which it retracts into the housing 11. Further, the latching claw 43 is urged to rotate in a direction to latch on the pressing lever 41 by a helical spring 61.

  A trigger 63 is provided in the housing 11 as detection means that can move forward and backward from the front panel 13, and the trigger 63 is urged in a direction protruding from the housing 11 by an urging spring 65. The trigger 63 is provided with a collar portion 63a, and one end of a rotatable release lever 67 contacts the collar portion 63a. The release lever 67 restricts the release of the latching claw 43 from the pressing lever 41 by engaging the other end with the latching claw 43. On the other hand, when the trigger 63 is pushed into the housing 11 against the biasing spring 65, the release lever 67 is rotated clockwise in FIG. 1 by the flange portion 63a. The latch of 43 on the pressing lever 41 is released. That is, the trigger 63 detects proximity to the door frame when the door is closed. The pressing lever 41 is rotated clockwise in FIG. 1 by the urging force of the first spring 39a and the second spring 39b when the latching by the latching claw 43 is released.

  As in the present embodiment, the detection means is a trigger 63 that is retracted by contact with the door frame when the door is closed and operates the release lever 67 in the swing restriction release direction, so that the door is closed. When approaching the door frame, the trigger 63 contacts the door frame and moves backward. Along with this backward movement, the release lever 67 is operated, and the latching of the latching claw 43 that restricts the swinging of the pressing lever 41 is released. That is, the approach to the door frame when the door is closed can be configured only by a simple mechanism composed of mechanical elements. As a result, the operation start of the retractable latch can be controlled with high reliability.

  In addition, as a detection means, the proximity sensor which detects the predetermined distance of a door and a door frame may be used. Examples of the proximity sensor include an electrical proximity sensor different from a trigger mechanism composed of mechanical elements, such as a magnetic detection sensor. According to such a proximity sensor, the movable part is not exposed and malfunction due to the touch of the movable part can be made difficult to occur.

Next, the operation of the closing assist device 100 will be described.
FIG. 4 is a diagram for explaining the operation of the electric actuator at the start of operation, FIG. 5 is a horizontal sectional view of the door when the door frame is close, FIG. 6 is a diagram for explaining the operation when the urging means is compressed, and FIG. FIG. 8 is an explanatory diagram of the operation when the release lever is operated, FIG. 9 is an explanatory diagram of the operation when the retracting latch protrudes, FIG. 10 is an explanatory diagram of the operation when the retracting operation of the retracting latch is completed, and FIG. FIG.
As shown in FIG. 4, when an external signal is input, the motor 15 is driven, and the motor 15 is driven to rotate the rotating plate 25 counterclockwise via the worm 19, the first gear 21, and the second gear 23. It is rotated.

  When the rotating plate 25 is rotated counterclockwise, the engaging pins 31 and 31 come into contact with the proximal end of the spring compression lever 33, and the spring compression lever 33 is rotated clockwise. In this state, as shown in FIG. 5, the door 71 is closed to the door frame 73 side. Also during this time, as shown in FIG. 6, when the motor 15 is further driven, the spring cover 37 is moved rightward by the spring compression lever 33, and the first spring 39a and the second spring 39b are compressed. Even in this case, the pressing lever 41 is latched by the latching claw 43 and its rotation is restricted.

  When the door 71 is closed and the trigger 63 comes into contact with the strike 75 provided on the door frame 73 as shown in FIG. 7, the trigger 63 is retracted into the housing 11 by the reaction force from the strike 75. Then, as shown in FIG. 8, the flange 63 a of the trigger 63 presses the release lever 67, and the release lever 67 releases the latching of the latching claw 43 with respect to the pressing lever 41. Thereby, the pressing lever 41 presses the roller 53 of the retracting latch 45 by the urging force of the first spring 39a and the second spring 39b.

  The pull-in latch 45 is protruded from the housing 11 by being pressed by the pressing lever 41. As shown in FIG. 9, the protrusion first moves the rotating shaft 45 a along the long hole 49 upward in FIG. 9, and then slides after the rotating shaft 45 a reaches the upper end of the long hole 49. As the pin 45b moves along the guide groove 51, the retracting latch 45 projects in an arcuate movement locus. As a result, the front end of the retracting latch 45 first comes into contact with the inner wall of the strike 75 and subsequently presses the inner wall, thereby closing the door 71 in the pressing direction of the packing 77 as shown in FIG. It will be. Thereafter, the rotating plate 25 is further rotated counterclockwise by the motor 15, and the engagement between the engagement pins 31, 31 and the spring compression lever 33 is released as shown in FIG.

  In the opening operation of the door 71, when the motor 15 is driven, the rotating plate 25 is rotated clockwise from the state of FIG. 11, and one engaging pin 31 moves the central convex portion 33b of the spring compression lever 33. After pressing and rotating the spring compression lever 33 counterclockwise, the other engagement pin 31 presses the base end 33 c of the spring compression lever 33. At the same time, the wing portion 25b of the rotating plate 25 presses the base end piece 41c of the pressing lever 41, thereby rotating the pressing lever 41 counterclockwise and again latching the stepped portion 41a on the latching claw 43. As a result, the retracting latch 45 is put on standby in the retracted state (the state shown in FIG. 1). In this state, the convex piece 27 operates the limit switch 29, and the drive of the motor 15 is stopped. Alternatively, when the door 71 is opened, the strike 75 moves the retracting latch 45 in the opposite direction to the above, and when the trigger 63 protrudes, the pressing lever 41 rotates counterclockwise, and the stopper lever 57 It leaves | separates from the compression lever 33, and each returns to an initial position with the urging | biasing force of 1st, 2nd spring 39a, 39b.

  Therefore, according to the closing assist device 100, the motor 15 driven by the signal input from the outside of the housing 11 and the strike 75 of the door frame 73 projecting along the arc-shaped movement locus by the operating force generated by the driving of the motor 15. Since the pull-in latch 45 is provided, the pull-in latch 45 pulls the strike 75 immediately before the door is closed, so that the door closing operation force that is increased by pressing the packing 77 when the door is closed can be saved. . Further, since the door closing operation force is greatly reduced, it is not necessary to close the door 71 by contributing an inertial force, and the impact at the time of closing the door can be reduced. Furthermore, since the door closing operation force in different directions is unnecessary, the operability when the door is closed can be improved.

  Further, the urging force is accumulated by driving the motor 15, and the accumulated urging force is released by the proximity detection information of the trigger 63 and is applied to the retracting latch 45 via the pressing lever 41. The retractable latch 45 can be operated, and the reliability of the closing assist operation can be improved.

Next, another embodiment of the closing assist device according to the present invention will be described.
12 is a horizontal sectional view of the closing assist device according to the second embodiment, and FIG. 13 is a front view of the closing assist device shown in FIG. In addition, the same code | symbol is attached | subjected to the member same as the member shown in FIGS. 1-11, and the overlapping description shall be abbreviate | omitted.
The closing assisting device 200 according to this embodiment is provided with the casing 91 exposed on the surface of the door 71 on the closing direction side. A motor 15 is provided in the housing 91, and the motor 15 drives a drive shaft 93 via the speed reducer 17.

  A third gear 95 is fixed to the drive shaft 93, and the third gear 95 meshes with a fourth gear 99 fixed to the rotating plate 97. The rotating plate 97 is rotatably supported by a support shaft 98 provided on the plate portion 47. Therefore, when the motor 15 is driven, the rotating plate 97 is rotated via the third gear 95 and the fourth gear 99. Three engaging pins 31, 31, 31 protrude from the plate surface of the rotating plate 97 at equal intervals in the circumferential direction.

  A retractable latch 101 is rotatably provided in the housing 91 via a support shaft 103 in the same direction as the drive shaft 93 of the motor 15. A drive lever 105 is rotatably supported on the support shaft 103. The drive lever 105 has a stopper piece 105a. The stopper piece 105a abuts against a side portion of the retracting latch 101 and restricts the counterclockwise rotation of the retracting latch 101. Further, the drive lever 105 is rotated counterclockwise in FIG. 12 when the base end 105 b is pressed by the engagement pin 31. A spring 107 as an urging means is extrapolated to the support shaft 103, and the spring 107 urges the retracting latch 101 in a direction to abut against the stopper piece 105a.

  A roller 111 that is rotatable via a shaft 109 is provided at the tip of the retracting latch 101. A proximity sensor 113 similar to the above is provided in the housing 91, and the proximity sensor 113 can detect a predetermined distance from the door frame 73.

Next, the operation of the closing assist device 200 will be described.
FIG. 14 is a horizontal sectional view of the door when the door frame is close, FIG. 15 is an operation explanatory diagram at the start of driving the electric actuator, and FIG. 16 is an operation explanatory diagram in the closed state.
In the closing assist device 200, when the door 71 starts to close, the retracting latch 101 is accommodated in the housing 91 as shown in FIG. As shown in FIG. 15, when the door 71 approaches the door frame 73, the proximity sensor 113 is activated to drive the motor 15. When the motor 15 is driven, the rotary plate 97 is rotated clockwise, the base end 105b of the drive lever 105 is pressed against the engagement pin 31, and the drive lever 105 is rotated counterclockwise.

  As a result, the retracting latch 101 is rotated counterclockwise by the urging force of the spring 107, and the roller 111 is projected from the housing 91 while drawing an arcuate movement locus. In the retracting latch 101 protruding from the casing 91, the roller 111 abuts against the packing holding wall 115 of the door frame 73. Further, when the motor 15 is driven, the drive lever 105 is rotated counterclockwise as shown in FIG. 16, and the retracting latch 101 is also rotated in the same direction, so that the roller 111 holds the packing. The wall 115 is pressed. As a result, the door 71 is closed in a state where the packing 77 is pressed.

  In the opening operation of the door 71, when the motor 15 is driven, the rotating plate 97 is rotated counterclockwise from the state of FIG. 16, and the engaging pin 31 presses the base end 105b of the driving lever 105. Thus, the drive lever 105 and the pull-in latch 101 are rotated clockwise, and the pull-in latch 101 is put on standby in the retracted state (the state shown in FIG. 14).

  Therefore, according to the closing assist device 200, the proximity sensor 113 that detects the proximity to the door frame 73 when the door is closed, the motor 15 that is driven by a signal input from the proximity sensor 113, and the driving of the motor 15 Is provided with a retracting latch 101 that protrudes in an arcuate movement locus and presses the packing holding wall 115 of the door frame 73. The door closing operation force that increases by pressing can be saved. Further, since the door closing operation force is greatly reduced, it is not necessary to close the door 71 by contributing an inertial force, and the impact at the time of closing the door can be reduced.

  In each of the above-described embodiments, the retracting latches 45 and 101 are configured to abut against and press against the inner wall of the strike 75 or the packing holding wall 115, and the detection means serving as the trigger 63 or the proximity sensor 113 is the door 71. It is supposed to detect the proximity of the door frame 73 to the door frame 73, and further, an example of a structure with an electric actuator composed of the motor 15 is shown. However, the present invention is not limited to these configurations. Not only mechanical elements such as triggers and sensors that are electrical configurations, but also other configurations, or a structure that combines these mechanical and electrical structures, and as an actuator, an electric motor In addition to the above, it may be a mechanism composed of other driving sources, and it is also a linear motion other than the rotating actuator such as the motor. Such as actuators, it may be other configurations. And it may be detected not when the door and the door frame are close to each other, but when the door is moved to a position before the door is completely closed, i.e., not close to each other but immediately before closing. You may comprise so that this may be detected in a state and the operation | movement mentioned above may be performed. Further, the latch is not limited to the structure as in each of the above embodiments, and the portion abutting on the latch may be configured as another shape and structure as a latch receiver. In this latch receiver, it is preferable that the closing force is applied to the outdoor side surface in the state where the latch is in contact, and the door closing force is rotated to push the outdoor side surface.

It is a side view of the closing assistance device concerning the present invention. FIG. 2 is a horizontal sectional view of a retracting latch portion of the closing assist device shown in FIG. 1. FIG. 2 is an exploded view of the closing assist device shown in FIG. 1. It is operation | movement explanatory drawing at the time of the operation | movement start of an electric actuator. It is a horizontal sectional view at the time of door frame proximity of a door. It is operation | movement explanatory drawing of a biasing means compression state. It is operation | movement explanatory drawing at the time of trigger contact | abutting. It is operation | movement explanatory drawing at the time of a release lever action | operation. It is operation | movement explanatory drawing at the time of protrusion latching. It is operation | movement explanatory drawing at the time of completion of drawing operation of a drawing latch. It is operation | movement explanatory drawing showing the rotating plate at the time of drawing. It is a horizontal sectional view of the closing assistance device concerning a 2nd embodiment. It is a front view of the closing assistance device shown in FIG. It is a horizontal sectional view at the time of door frame proximity of a door. It is operation | movement explanatory drawing at the time of an electric actuator drive start. It is operation | movement explanatory drawing of a closed state.

Explanation of symbols

11, 91 ... Housing 15 ... Electric actuator (motor)
39a, 39b ... biasing means (first spring and second spring)
41 ... Pressing lever 43 ... Hook 45,101 ... Latch (retraction latch)
63 ... Detection means (trigger)
67 ... Release lever 71 ... Door 71a ... Surface in the closing direction 73 ... Door frame 75 ... Strike 100, 200 ... Closing assistance device 113 ... Detection means (proximity sensor)

Claims (6)

A latch, a detection means, an actuator, and a strike;
The detection means detects that the door has moved to the position before it completely closed,
A closing assisting device characterized in that a latch that is rotated by an actuator protrudes from a door and enters a strike and pushes the inner wall of the strike to assist the closing power of the door. A housing disposed on the door;
An electric actuator installed in the housing and driven by signal input from outside the housing;
A latch that protrudes from the housing in an arcuate movement locus by the actuation force of the electric actuator, and draws the strike of the door frame;
A closing assist device characterized by comprising: A biasing means for storing a biasing force by driving the electric actuator;
A pressing lever that is swung by the urging force of the urging means to project the latch along an arcuate movement locus;
A latching claw for restricting the swing of the pressing lever;
Detection means for detecting proximity to the door frame when the door is closed;
A release lever that operates according to proximity detection information by the detection means and releases the swing restriction of the pressing lever of the latching claw;
The closing assisting device according to claim 2, further comprising:   4. The closing assisting device according to claim 3, wherein the detecting means is a trigger that moves backward by contact with the door frame when the door is closed and operates the release lever in the swing restriction release direction. A housing attached to the surface of the door in the closing direction;
Detection means for detecting proximity to the door frame when the door is closed;
An electric actuator installed in the housing and driven by a signal input from the detection means;
A latch that protrudes from the housing in an arcuate movement locus by driving the electric actuator and draws the door frame;
A closing assist device characterized by comprising:   6. The closing assisting device according to claim 1, wherein the detecting means is a proximity sensor that detects a predetermined distance between the door and the door frame.

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