JP2006299593A - Door opening auxiliary device of door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for assisting force (opening force) when opening a door attached with a door closer. <P>SOLUTION: An assist driving shaft 129 for moving by interlocking with a pinion shaft 165 of the door closer 102, is fixed to a central part of a spiral spring 121, and an assist arm 124 is hooked on an outside end part 122 of the spiral spring 121. When moving the assist arm 124 by rotating a spring winding mechanism output shaft 125, the spiral spring 121 is wound, and resiliency is stored. When the door 103 starts to open, this resiliency is applied to the assist driving shaft 129, and is also applied to a pinion 164. This force becomes the direction for negating the resiliency of a compression spring 166, and weakens the action of the door closer 102 trying to rotate the pinion shaft 165, to thereby assist the opening force required for opening the door. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique for assisting force when opening a door and reducing labor required for opening the door.

  A door that is installed in an office or a residence is provided with a mechanism called a door closer that automatically closes the door. This door closer is described in Patent Document 1, for example.

  Hereinafter, the structure and mechanism of the closer will be briefly described. First, the door closer body is fixed to the door. There is a rack inside the door closer, and a pinion gear meshes with the rack. The rack is movable in its extending direction, and its movement is limited by a compression spring. The shaft of the pinion gear is fixed to one end of a substantially deformed V-shaped arm that is pivotally supported (supported in a rotatable state) by the closer body, and the other end of this arm is a frame structure of the doorway of the door It is pivotally supported by the body (door frame). The vertices of the substantially deformed V-shaped arm are coupled by a rotatable shaft structure, and the V-shaped angle can be freely changed.

  When the door is opened, the V-shaped angle of the arm opens, and the force that rotates the pinion gear against the closer body works. As a result, the pinion gear rotates, thereby moving the rack in its extending direction. As the rack moves, the compression spring contracts, and a repulsive force is stored in the compression spring.

  When the door is opened to some extent and the hand is released, the compressed compression spring tries to return to its original position and tries to return the rack to its original position. Due to the movement of the rack, the pinion gear rotates in the opposite direction (when opening the door). The rotation of the pinion gear exerts a force to narrow the V-shaped angle of the substantially V-shaped arm, contrary to the previous case. As a result, a force (closing force) for closing the door is applied to the door via the substantially V-shaped arm. Thus, when the hand is released from the open door, the door automatically attempts to close.

  The door closer is a mechanism that automatically closes an opened door, but the closing force becomes a resistance force when the door is opened. In other words, when the door is opened by pushing or pulling the door, it is necessary to overcome the force to close the door closer and move the door. In particular, when the door is completely closed, the boosting mechanism works, and the closing force from the door closer becomes very large.

  The closing force of the closer may be a heavy burden when opening the door. In particular, the elderly, children, injured people, or people with disabilities sometimes find it difficult to open the door.

  As a technique for solving this inconvenience, for example, techniques described in Patent Documents 2 to 5 are known. Patent Document 2 describes a mechanism that assists the opening of a door by applying a force in the direction of pushing the door open by a booster mechanism when a lever-type door knob is turned.

  In Patent Document 3, when a person enters and exits using a sensor, and the person opens the door, the force from the coil spring applied to the rack in the door closer (the restoring force from the compressed state) is canceled out on the rack moving shaft. The structure which applies force from the outside and reduces the closing force of the door closer is described.

  In Patent Document 4, a pinion gear that rotates in synchronization with the pinion gear of the door closer and a slider that meshes with the pinion gear are arranged, and a spring that applies force to the slider in the direction of opening the door during the door opening operation. A configuration is described in which the auxiliary force used is applied and the spring repulsive force does not work when the door is closed by a lock mechanism.

  In Patent Document 5, a motor is attached to a pinion shaft of a door closer via a clutch, and when a door opening operation is detected by a sensor, the clutch is connected to drive the motor, and a force for assisting the door opening is applied to the pinion shaft. The configuration to be added is described.

JP 2000-192726 A Japanese Patent No. 308469 JP 2000-54723 A JP 2004-143812 A JP 2004-244882 A

  However, the technique described in Patent Document 2 requires the door itself to have a new structure. In other words, it is not possible to add parts to products already on the market. For this reason, it is difficult to use this mechanism by partially adding a device to a door that has already been installed or replacing parts. This becomes a factor that increases the price of the product and also prevents the spread of the product.

  The technique described in Patent Document 3 has an advantage that it can be added to the structure of an existing door closer. However, since the force is directly applied to the rack by the solenoid, the power consumption of the solenoid is large and it cannot be said that it is economical. In addition, the solenoid must be controlled in accordance with the open state of the door and the force applied to the door by the operating person, which has the disadvantage of complicated control. Since the opening and closing of the door is performed frequently and roughly, precise control of such a solenoid is undesirable.

  The technique described in Patent Document 4 has an advantage that it can be added to the existing door closer structure. However, since the number of parts is large and the mechanism is complicated, there is dissatisfaction with respect to reliability and large size.

  The technique described in Patent Document 5 has an advantage that it can be added to the existing door closer structure. However, it requires a control system for sensors and motors and a complicated mechanical mechanism such as a clutch.

  Especially in the case of doors, there are many scenes where an excessive force is applied or they are treated roughly, so it is important to have a highly reliable configuration. The techniques described in Patent Documents 3 to 5 are not satisfactory in this respect.

  An object of this invention is to provide the technique which assists opening of a door by a simpler mechanism.

  The first invention includes a rotating shaft, and a spring that stores a repulsive force against the rotation of the rotating shaft, and is fixed to one end of the spring, and can rotate to store the repulsive force. Further, an assist drive shaft that rotates following the opening and closing of the door, a spring winding mechanism output shaft that is supported in a rotatable state with respect to the door body, and an assist arm having one end fixed to the spring winding mechanism output shaft (A) In the closed state of the door, the other end of the assist arm is engaged with the other end of the spring, and the spring winding mechanism output shaft rotates, so that the assist arm rotates and the The spring stores a repulsive force, and (B) when the door is opened, the spring opens the repulsive force and exerts a driving force on the assist drive shaft with the engaging portion with the assist arm as a fulcrum. Characterize Is a door opening assist device of the A.

  1st invention is useful as an apparatus added to a door closer. In this case, the assist drive shaft that rotates following the opening and closing of the door is connected to the pinion shaft of the door closer, and the drive force for assisting the opening force is transmitted from the assist drive shaft to the pinion shaft.

  Hereinafter, the first invention will be described with reference to an example in which a spiral spring is used as a spring. In this case, one end inside the spiral spring is fixed to the assist drive shaft, and the other end engages with the assist arm.

  First, in the closed state of the door, the assist arm is engaged with the other outer end of the spiral spring (the assist arm is hooked on the other end of the spiral spring). In this state, when the output shaft of the spring winding mechanism rotates, the spiral spring is wound and stores a repulsive force.

  When an attempt is made to open the door, the door knob is rotated, and the locked state by the door knob mechanism is released, the spiral spring releases the stored repulsive force with the engaging portion with the assist arm as a fulcrum. That is, the spiral spring exerts a rotational force to rotate the assist drive shaft with the engaging portion with the assist arm as a fulcrum.

  When the assist drive shaft is interlocked with the pinion shaft of the door closer, the rotational force is a force for rotating the pinion shaft of the door closer. Therefore, if the direction of this rotation is set to a direction that matches the direction in which the door is opened, the force that opens the spiral spring will assist the door in the opening direction.

  In this way, when the door is opened, the repulsive force stored in the spiral spring is released, and the released force is applied to the pinion shaft of the door closer and assists in opening the door. This assisting force counteracts and counteracts the force of closing the door of the door closer. In this way, the closing force of the door closer is offset and the burden when opening the door is reduced.

  In addition to the spiral spring described above, a torsion spring or a torsion coil spring can be employed as a spring that includes a rotating shaft and stores a repulsive force against the rotation of the rotating shaft. Since these springs store the force to rotate with respect to the shaft as a repulsive force, they occupy less space than compression springs and tension springs. Further, the occupied space can be reduced as compared with the magnitude of the repulsive force and the stroke size that can be expected to exhibit the repulsive force.

  In addition, the first invention has an advantage that the existing door closer mechanism can be used as it is. That is, since the assist drive shaft that is linked to the pinion shaft of the existing door closer is used as the rotating shaft of the spring, it is not necessary to make a major change to the structure of the existing door closer.

  That is, the door itself does not need to have a new structure. And an opening assistance function can be given by adding components to the goods already on the market. For this reason, goods can be supplied more inexpensively.

  In addition, the first invention includes a rotating shaft, and a spring (for example, a spiral spring) that stores a repulsive force with respect to the rotation of the rotating shaft only needs to be able to store the repulsive force. No complicated control is required for the power source (eg, motor). For this reason, a control mechanism and a structure can be simplified. These advantages can also be obtained in the second invention described later.

  According to a second aspect of the present invention, there is provided a spring having a rotating shaft and storing a repulsive force against rotation of the rotating shaft, and a spring winding mechanism output fixed to one end of the spring and rotating to store the repulsive force. The door includes an assist arm that engages with the other end of the shaft and rotates when the spring releases the repulsive force, and the other end of the assist arm rotates to open the door. It is the door opening assistance apparatus characterized by assisting. According to the second aspect, the repelling force of the spring is released, whereby the assist arm rotates, and the opening operation of the door is assisted by the rotational force.

  In the second invention, the main body of the door opening assisting device is fixed to the door, and a door closer is attached to the door, and the other end of the assist arm pushes the door closer arm to open the door. It is preferable to adopt a mode in which the assistance is performed.

  According to this aspect, the arm of the door closer is pushed by the rotation of the other end of the assist arm. Since the main body of the door opening assisting device is fixed to the door, the force by which this assist arm pushes the door closer arm is a reaction that moves the main body of the door opening assisting device away from the door closer arm. . Thus, an assisting force in the direction in which the door opens is acted by the movement of the assist arm.

  In the second invention, the main body of the door opening assisting device is fixed to the door frame, and the other end of the assist arm pushes the door surface to assist the opening operation of the door. preferable. According to this aspect, the door surface is pushed by the rotation of the other end of the assist arm, and the pushing force exerts an assisting force in the door opening direction.

  The invention described above further includes a lock mechanism for fixing the output shaft of the spring winding mechanism, and (A) when the door is opened, the output shaft of the spring winding mechanism is fixed by the lock mechanism, and (B) the door is closed. At this time, it is preferable that the lock mechanism is released or the engagement of the assist arm is released, and the spring does not exhibit a driving force with respect to the assist drive shaft.

  According to this aspect, when the door is opened in the first invention, the spring winding mechanism output shaft is fixed, thereby fixing the assist arm. Then, the engagement point between the assist arm and the spring becomes a fulcrum, and the repulsive force of the spring becomes a force for effectively rotating the assist drive shaft.

  Further, when the door is closed from the opened state in the first invention, the fixing of the output shaft of the spring winding mechanism is released, so that the function of fixing one end of the spring by the assist arm does not work, and therefore the repulsive force of the spring The drive action on the assist drive shaft due to will not work. As a result, the function of a normal door closer is exhibited when the door is closed.

  Further, when the door is closed from the opened state in the first invention, the assist arm is disengaged from one end of the spring (that is, the engagement state is released), so that the drive action to the assist drive shaft by the repulsive force of the spring is achieved. Stop working. As a result, the normal door closer functions when the door is closed.

  Further, according to this aspect, when the door is opened in the second invention, the spring winding mechanism output shaft is fixed, whereby the force due to the rotation of the assist arm due to the repulsive force of the spring is effectively exhibited, and the assist arm It is possible to effectively assist the opening operation of the door by the movement of.

  In the second aspect of the invention, when the door is closed from the opened state, the fixing of the output shaft of the spring winding mechanism is released, and at this time, the driving force of the assist arm due to the repulsive force of the spring is not exhibited. Therefore, a normal door closer function is exhibited when the door is closed.

  In the second invention, when the door is closed from the open state, the assist arm is disengaged from one end of the spring (that is, the engagement state is released), so that the assist arm driving action by the repulsive force of the spring does not work. . As a result, the normal door closer functions when the door is closed.

  It is preferable that the release of the lock mechanism or the release of the engagement is performed when a predetermined time has elapsed from the start of the door opening operation. According to this aspect, the lock mechanism is released when a certain amount of time has elapsed after the door starts to be opened, and thereafter, the function of automatically closing the door by the function of the door closer functions. In other words, when trying to open the door, the assisting force is activated, and after a predetermined time has elapsed since the attempt to open the door, the assisting force does not work and the force to close the door of the door closer. Will work. Thereby, a door can be opened lightly and the mechanism in which the opened door closes automatically can be obtained.

  The release of the lock mechanism or the release of the engagement may be performed when the door reaches a predetermined open state. In this case, when the door is opened and opened to some extent (for example, when the opening angle from the closed state becomes 70 degrees or more), the lock mechanism is released or the engagement is released, and thereafter the door closer is released. The function to automatically close the door by function works. If the door opens to some extent, even if the function of the door closer works, it does not require much force to open the door. Therefore, even if this structure is used, the door can be opened lightly, and a mechanism for automatically closing the opened door can be obtained.

  In the above-described present invention, when the door is changed from the open state to the closed state, the assist arm is engaged with the end portion of the spring, and the spring winding mechanism output shaft is rotated, and the repulsive force is accumulated in the spring. It is preferable to adopt a configuration that can be used.

  According to this aspect, in a state after the door is opened and then the opened door is closed, an operation for storing a repulsive force in the spring is performed in preparation for the next door opening operation. Thereby, by opening the door, the repulsive force of the spring is released, and even when the driving ability by the spring is lowered, the driving force can be recovered when the door is closed.

  According to the present invention, a technique for assisting door opening by a simpler mechanism is provided. That is, according to the first invention, for example, by applying a driving force to the assist drive shaft that rotates in conjunction with the pinion shaft of the door closer using a spring that stores a repulsive force against the rotation of the rotation shaft, The force to close the door of the door closer is offset. The expression of the repulsive force of the spring and the accumulation of the repulsive force are controlled by the action of an assist arm that engages with one end of the spring. This configuration is very simple and highly reliable because it only needs to prepare a spring, an assist arm, and a drive shaft for rotating the assist arm that accumulates the repulsive force against the rotation of the rotating shaft. can do.

  According to the second aspect of the invention, the assist arm is rotated by the repulsive force of the spring that accumulates the repulsive force with respect to the rotation of the rotating shaft, and the door arm or the door of the door closer is relatively pushed by the movement of the assist arm. Thus, the force of closing the door of the door closer can be canceled and the opening operation of the door can be assisted. This configuration is also very simple and highly reliable because it only needs to prepare a spring, an assist arm, and a drive shaft for rotating the assist arm that accumulates repulsive force against the rotation of the rotating shaft. can do.

(First embodiment)
1-1. Configuration of First Embodiment FIG. 1 is a front view showing an example of a state in which a door opening assist device using the invention is attached to a door. FIG. 2 is a top view showing an example of a state in which the door opening assist device using the invention is attached to the door.

  In FIG. 1, the door opening assist device 101 using the invention, the door closer 102, the door 103, the door frame 104, an arm portion 105 that connects the door closer 102 and the door frame 104, and two pieces constituting the arm portion 105 are illustrated. Arms 106 and 107, a shaft connecting portion 151 that connects the two arms 106 and 107 with a shaft so that the opening angle between them can be freely changed, and a door closer side shaft supporting portion 108 that supports the arm 107 on the door closer 102. , A door frame side pivot support 109 for pivotally supporting the arm 106 to the door frame 104, a door frame side pivot flange 109a for fixing the door frame side pivot support 109 to the door frame 104, a rotation center shaft 110 of the door hinge 111, and a power switch. 112 is shown.

  The door closer 102 includes a rack 161, a pinion 164, a pinion shaft 165 of the pinion 164, and a compression spring 166. The rack 161 is engaged with the pinion 164. The upper part of the pinion shaft 165 is fixed to the arm 107, and the lower part is connected to the assist drive shaft 129.

  In the configuration shown in FIG. 1, the pinion 164 is on the front side of the rack 161. When the pinion 164 rotates clockwise as viewed from above, the rack 161 moves to the right in FIG. 1, and the pinion 164 rotates counterclockwise. 1, the rack 161 moves to the left in FIG.

  When the door 103 is opened, the door closer 102 moves to the other side of the page of FIG. 1, and the opening angle (V-shaped angle) between the arm 106 and the arm 107 increases accordingly. At this time, the arm 107 performs relative rotation in the clockwise direction (when viewed from above) with the door closer-side shaft support portion 108 as an axis. By the relative movement of the arm 107 with respect to the door closer 102, the pinion shaft 165 rotates relatively clockwise as viewed from above. That is, when the door 103 is opened, the pinion shaft 165 relatively rotates clockwise as viewed from above.

  The opening assisting device 101 is fixed to the door 103 as a whole. The door opening assist device 101 includes a spiral spring 121, an outer end 122 of the spiral spring 121, an inner end (center portion) 123 of the spiral spring 121, an assist arm 124, a spring winding mechanism output shaft 125, and a spring winding mechanism output. A driving mechanism 126 for rotating the shaft 125, a motor 127 for supplying a driving force to the driving mechanism 126, a driving control unit 128 for controlling an operation to be described later, an assist driving shaft 129 to which an inner end 123 of the spiral spring 121 is fixed, An assist drive shaft rotation state indicating piece 130 is provided.

  An end 123 on the inner side (center portion) of the spiral spring 121 is fixed to the assist drive shaft 129, and the assist drive shaft 129 is connected to the pinion shaft 165. When the outer end 122 is fixed in a state where the repulsive force is stored in the spiral spring 121, the stored repulsive force works as a force to rotate the pinion shaft 165. By utilizing this action, the opening force of the door 103 is assisted.

  The outer end 122 of the spiral spring 121 is fixed by engaging the assist arm 124 with the end 122. The other end of the assist arm 124 is fixed to the spring winding mechanism output shaft 125.

  In the structure shown in the figure, the spring winding mechanism output shaft 125 and the assist drive shaft 129 are located on substantially the same axis. By doing so, the spiral spring 121 can be efficiently wound by the rotation of the assist arm 124.

  The drive control unit 128 includes a control CPU, a memory circuit, various interface circuits, and a timer circuit. As will be described later, the timer circuit is used to determine the timing for turning off the opening force assist function.

  A lock mechanism that locks the spring winding mechanism output shaft 125 so as not to rotate is included in the drive mechanism 126.

  1 and 2 show a door opening / closing detection sensor 171, an opening force assist end position detection sensor 172, a spring winding angle detection sensor 173, and a zero position detection sensor 174. The door open / close detection sensor 171 detects whether the door 103 is closed or not closed. The opening force assist end position detection sensor 172 detects the degree of opening of the door that terminates the opening force assist function generated by the door opening assist device 101. The spring winding angle detection sensor 173 detects the winding condition of the spiral spring 121. The zero position detection sensor 174 detects whether or not the assist arm 124 is present at a position where the repulsive force is not applied to the spiral spring 121.

  In this configuration, the door 103 is first closed, and the door 103 is fixed to the door frame 104 by a lock mechanism (not shown) (usually provided as a mechanism interlocked with the door knob). The drive shaft 125 is rotated clockwise in FIG. Then, the outer end 122 of the spiral spring 121 is pulled in the clockwise direction, and the spiral spring 121 is wound.

  That is, when the door 103 is closed, the pinion shaft 165 of the door closer 102 cannot rotate, and the assist drive shaft 129 that moves in conjunction with the pinion shaft 165 cannot rotate. In this state, the assist arm 124 is engaged with the outer end 122 of the spiral spring 121, the spring winding mechanism output shaft 125 is rotated, and the assist arm 124 is rotated clockwise. At this time, since the inner end 123 of the spiral spring 121 is fixed, the spiral spring 121 is wound as the assist arm 124 rotates, and a repulsive force is stored in the spiral spring 121.

  When the repulsive force is stored in the spiral spring 121 to some extent, the assist arm 124 is locked by the function of the drive mechanism 126. And the door knob which is not illustrated is operated, the state which fixed the door 103 to the door frame 104 is cancelled | released, and the door 103 begins to open. Then, the repulsive force stored in the spiral spring 121 becomes a driving force for rotating the assist driving shaft 129, which turns the pinion shaft 165 clockwise (or from the viewpoint of FIG. 2) clockwise. . This force is a force that attempts to move the rack 161 to the right in FIG. 1, and this is a direction that counteracts the repulsive force of the compression spring 166. Therefore, the action of the door closer 102 that attempts to rotate the pinion shaft 165 counterclockwise is weakened. Thus, the opening force when opening the door is assisted.

1-2. Operation of First Embodiment First, the function of the door closer 102 will be briefly described. FIG. 1 shows a state where the door 103 is closed. In this state, when the door 103 performs an opening operation around the rotation center axis 110 of the hinge 111, the door 103 rotates in the direction beyond the paper surface of FIG. 1 and opens. At this time, the angle between the arms 106 and 107 opens. Since the pinion shaft 165 is fixed to the arm 107, the pinion shaft 165 rotates in the clockwise direction as viewed from above, and the rack 161 moves in the right direction in FIG. Compress.

  When the hand is released from the door, the rack 161 is pushed in the left direction in FIG. 1 by the repulsive force stored in the compression spring 166, whereby the pinion 164 rotates in the opposite direction. The rotation of the pinion 164 (rotation opposite to that when the door is opened) is counterclockwise when viewed from above, and the arm 107 is moved in a direction in which the angle between the arm 107 and the arm 106 is reduced. It becomes a driving force. Thereby, the force (closing force) which closes the door 103 works. Thus, the automatic closing operation of the door 103 by the door closer 102 is performed.

  Hereinafter, the function of each part in actually opening and closing the door will be described based on specific examples. 3 to 4 are top views showing the open / closed state of the door step by step, and in particular, the transition of the engagement state between the spiral spring and the assist arm in each step is shown. FIG. 5 is a flowchart showing a control procedure of the opening assist device 101 in the opening / closing operation exemplified below.

  First, consider a state where the door 103 is closed while the power switch 112 is OFF. FIG. 3A shows this state. In this state, the spiral spring 121 is not wound when the door 103 is closed. That is, the assist arm 124 is lightly in contact with the outer end 122 (see FIG. 2) of the spiral spring 121 and is weakly engaged, but the assist arm 124 is not particularly in a state where the spiral spring 121 is wound.

  In the state shown in FIG. 3A, when the power switch 112 is turned on (step S701), the assist arm 124 rotates clockwise, and the end of the assist arm 124 is the end 122 of the spiral spring 121 outside. The state of being hooked (see FIG. 1) becomes stronger.

  Here, as shown in FIG. 2, the inner end 123 of the spiral spring 121 is fixed to the assist drive shaft 129, and the assist drive shaft 129 cannot be rotated because the door is closed. Therefore, when the assist arm 124 further rotates clockwise, the spiral spring 121 is wound according to the rotation of the assist arm 124.

  The movement of the assist arm 124 is performed by rotating the motor 127 shown in FIG. 1 and rotating the spring winding mechanism output shaft 125 via the drive mechanism 126.

  In step S701, when the spiral spring 121 starts to be wound, the assist arm 124 rotates clockwise, and the assist arm 124 approaches the spring winding angle detection sensor 173 at a stage where the assist arm 124 rotates to some extent (FIG. 3B). Then, when the assist arm 124 comes closest to the spring winding angle detection sensor 173, a predetermined signal is output from the spring winding angle detection sensor 173, and a state where the spiral spring 121 is wound at a predetermined winding angle is detected. (Step S702).

  After obtaining a state where the spiral spring 121 is wound to some extent, the operation of the assist arm 124 is stopped, and the spring winding mechanism output shaft 125 is locked by the lock mechanism in the drive mechanism 126 (step S702). The assist arm 124 is fixed by locking the spring winding mechanism output shaft 125. In this way, the spring winding operation is finished, and a preparation state (open force holding preparation state) in which the opening force assisting function can be exhibited is obtained (step S702). In this state, the spiral spring 121 is wound and stores a repulsive force.

  When a door knob (not shown) is pressed and the door 103 starts to be opened, the door open / close detection sensor 171 detects it and starts a timer in the drive control unit 128 (step S703).

  When the door knob is pushed in step S703, the opening force assist function by the spiral spring 121 is activated (step S704). That is, the repulsive force of the spiral spring 121 causes a force to rotate the assist drive shaft 129 (see FIG. 1), and a force to rotate the pinion shaft 165 in a direction to cancel the repulsive force of the compression spring 166. . At this time, the outer end 122 of the spiral spring 121 is engaged with the assist arm 124 in a fixed state, and the portion (end 122) cannot move in the direction of releasing the repulsive force. Therefore, the repulsive force of the spiral spring 121 acts as a force (a force for assisting the opening force) to rotate the assist drive shaft 129 with the outer end 122 of the spiral spring 121 as a fulcrum. This force is a force that works in a direction to cancel the force to close the door 103 of the door closer 102, thereby assisting the force to open the door 103.

  As shown in FIG. 4A, when the door 103 is opened, it is determined whether the timer has counted a predetermined set number of seconds (step S705), and the predetermined number of seconds has elapsed. For example, the assist arm 124 is returned to the zero position (position shown in FIG. 3A) (step S706). FIG. 4B shows an intermediate state in the middle of returning the assist arm 124 to the zero position. As the assist arm 124 moves to the zero position, the force for assisting the opening force becomes weaker.

  In step S705, contents for determining whether or not the door angle exceeds the set angle are also described (an example of this determination will be described later).

  When the zero position detection sensor 174 detects that the assist arm 124 has returned to the zero position (step S707), the movement of the assist arm 124 is stopped. In this state, the engagement state of the assist arm 124 to the outer end 122 of the spiral spring 121 is weak. For this reason, the spiral spring 121 is in a state of losing the repulsive force stored. That is, the function of assisting the force of opening the door 103 at the stage where the assist arm 124 stops at the zero position does not work.

  When the door 103 does not need to be opened and the hand is released from the door 103, the door 103 is automatically closed by the action of the door closer 102 (step S708). At this time, the spiral spring 121 does not store a repulsive force and does not function as a spring. Therefore, the door opening assist device 101 does not function, the door closer 102 performs normal operation, and the door 103 is automatically closed.

  When the door open / close detection sensor 171 detects that the door 103 is closed, the winding spring 121 starts to be wound from the state shown in FIG. 3A (step S709). And the process after step S702 is repeated.

1-3. Effect of First Embodiment FIG. 6 shows the relative value of the door angle (0 degree in the closed state, the value increases as the door is opened) on the horizontal axis, and the relative value of the force (operation force) pushing the door. Is measured data with the vertical axis taken. As shown in FIG. 6, when only the door closer is attached to the door (plot point (A)), a large force is required as a force to push the door at the beginning of opening the door (region where the door opening angle is small). The However, when a door opening assist device using the present invention is attached in addition to the door closer (plot point (B)), the force required to start opening the door may be extremely weak. Needless to say, this opening force assisting effect can be similarly obtained when the door is pulled open.

1-4. Another Example of First Embodiment As the determination in step S705, it may be determined whether or not the opening angle of the door 103 exceeds a predetermined value. For example, it is determined whether or not the opening angle of the door 103 exceeds 60 degrees. If the opening angle of the door 103 exceeds 60 degrees, the process proceeds to step 706, and if not, the operation of repeating step S705 is performed. According to this aspect, the function of assisting the opening force is stopped when the door is opened to some extent. The door opening angle is detected by detecting the angular position of the assist drive shaft rotation state indicating piece 130 by the opening force assist end position detection sensor 172. Of course, the opening angle of the door 103 may be measured by other methods.

(Second Embodiment)
2-1. Configuration of Second Embodiment FIG. 7 is a top view (A), a front view (B), and a side view (C) showing an outline of another embodiment. 7 shows a door opening assist device main body (case main body) 801, a motor 802, a speed reducer 803, a control unit 804, a spring winding mechanism output shaft 806, a spiral spring 807, a spiral spring inner end 807a, and a spiral. An outer end 807b of the spring, an assist arm 809, a protrusion 809a fixed to the assist arm 809, a shaft support 810 that rotatably supports one end of the assist arm 809, and a shaft supported rotatably on the other end of the assist arm 809 The roller 811, the spring zero position detection sensor 813, the spring winding angle detection sensor 814, the assist end position detection sensor 815, the spring rotation state instruction piece 816, and the door closer side pivot support portion 108 that pivotally supports the arm 107 on the door closer 102. A shaft support 109 that rotatably supports the arm 106 on the door frame side, and this shaft support 109 is used as a door frame. Substantially triangular flange 109a is shown to be fixed to 04.

  The door opening assisting device main body 801 is fixed to the door surface 103 a of the door 103. A motor 802 and a speed reducer 803 are fixed to the door opening assist device main body 801. Further, the speed reducer 803 is provided with a lock mechanism, and the spring winding mechanism output shaft 806 can be fixed by the lock mechanism. The control unit 804 controls the rotation of the motor 802 and the lock mechanism of the speed reducer 803.

  The spring winding mechanism output shaft 806 is an output shaft of the speed reducer 803 and is rotated by the driving force of the motor 802 and exhibits the ability to wind the spiral spring 807. Further, when the lock mechanism of the speed reducer 803 is turned ON, the spring winding mechanism output shaft 806 is locked so as not to rotate.

  An inner end (end of the central portion) 807 a of the spiral spring 807 is fixed to the spring winding mechanism output shaft 806, and an outer end 807 b of the spiral spring 807 engages with the protrusion 809 b of the assist arm 809.

  One end of the assist arm 809 is rotatably supported by the spring winding mechanism output shaft 806 at the shaft support portion 810, and the roller 811 is rotatably supported by the other end. The periphery of the roller 811 is covered with rubber, and that portion is in contact with the inside of the arm 107.

  The spring zero position detection sensor 813 is a sensor that detects a state where the spiral spring 807 is not wound. This detection is performed when the tip position of the spring rotation state indicating piece 816 fixed to the spring winding mechanism output shaft 806 is close to the sensing element arranged at the tip of the spring zero position detection sensor 813. Examples of the sensing element include a microswitch, a magnetic detection element, and a light detection element.

  The spring winding angle detection sensor 814 is a sensor that detects whether or not the spiral spring 807 is wound to a predetermined degree. Further, the assist end position detection sensor 815 is a sensor that detects the timing when the assist of the opening operation of the door 103 by the function of the spiral spring 807 ends. The detection mechanism in the spring winding angle detection sensor 814 is the same as that in the spring zero position detection sensor 813, and the detection mechanism in the assist end position detection sensor 815 is performed by detecting the proximity of the protrusion 807b.

2-2. Operation of Second Embodiment First, when the door 103 is closed (the state shown in FIG. 7B), the motor 802 is rotated, the spring winding mechanism output shaft 806 is rotated, and the spiral spring 807 is wound. I do. At this time, the outer end 807b of the spiral spring 807 is engaged with the protrusion 809a of the assist arm 809, and the assist arm 809 is in a state where it cannot rotate (turn). Therefore, the spiral spring 807 is wound. Thus, the spring winding mechanism output shaft 806 rotates counterclockwise as viewed from above, and the repulsive force is stored in the spiral spring 807.

  In this state, the repulsive force of the spiral spring 807 is applied to the protrusion 809a of the assist arm 809, and this force rotates the assist arm 809 in the direction indicated by the arrow 817 with the shaft support 810 as an axis. It will be the power to try.

  Since the spring winding mechanism output shaft 806 is fixed to the door surface 103 a via the door opening assisting device main body (case main body) 801, this force is a force for moving the door 103 away from the arm 107. .

  In this state, when the door knob (not shown) is operated to release the lock mechanism (not shown) of the door 103 and rotate the door 103 in the direction of the arrow 819, the arm 106 and the arm 107 pivot the shaft connecting portion 151. It tries to open in the V-shape. At this time, the force by which the roller 811 pushes the arm 107 works. The door opening assisting device main body 801 is subjected to a force to keep itself away from the arm 107 as a reaction of this force. Since the door opening assisting device main body 801 is fixed to the door 103, this reaction becomes a force for opening the door 103. In this way, the assist arm 809 rotates to apply a force that assists the opening operation of the door 103.

  That is, the assist arm 809 tries to rotate about the spring winding mechanism output shaft 806, and this rotational force is transmitted to the arm 107 via the roller 811, and the operation to open the door 103 is assisted as a reaction. The In this manner, the same door opening operation assistance as in the first embodiment is performed.

  The mechanism shown in the present embodiment can perform the same operation as in the first embodiment. That is, it is possible to perform an operation according to the procedure shown in FIG. And the same operation effect as a 1st embodiment can be obtained.

  In the present embodiment, the usage of the spiral spring is different from that in the first embodiment. That is, in the first embodiment, when the end of the spiral spring is fixed by the assist arm and the repulsive force stored in the spiral spring is released, the end of the spiral spring is used as the fulcrum. The assist drive shaft fixed to the section is rotated. The rotation of the assist drive shaft is transmitted to the pinion shaft of the door closer, thereby assisting in the door opening operation.

  On the other hand, in the present embodiment, the inner end of the spiral spring is fixed to the spring winding mechanism output shaft, and the spring winding mechanism output shaft is rotated to wind the spiral spring and to exert a repulsive force on the spiral spring. store. The repulsive force of the spiral spring causes the assist arm engaged with the outer end of the spiral spring to pivot, and the pivoting force is used to push the door closer arm. Assist the operation.

(Third embodiment)
3-1. Configuration of Third Embodiment FIG. 8 is a top view (A) and a front view (B) showing an outline of another embodiment. 8 shows a door opening assist device main body (case main body) 801, a motor 802, a speed reducer 803, a control unit 804, a spring winding mechanism output shaft 806, a spiral spring 807, a spiral spring inner end 807a, a spiral. An outer end 807b of the spring, an assist arm 809, a protrusion 809a fixed to the assist arm 809, a shaft support 810 that rotatably supports one end of the assist arm 809, and a shaft supported rotatably on the other end of the assist arm 809 The roller 811, door knob 812, spring zero position detection sensor 813, spring winding angle detection sensor 814, assist end position detection sensor 815, spring rotation state indicating piece 816, the pressed surface 103 a of the door 103, and the arm 107 rotate to the door closer 102. Door closer side pivot support part 108 that pivots freely, arm 106 can be freely rotated on the door frame side Shaft support 109 which supports, are shown substantially triangular flange 109a for fixing the shaft support 109 to the door frame 104.

  The door opening assisting device main body 801 is fixed to the door frame 104. A motor 802 and a speed reducer 803 are fixed to the door opening assist device main body 801. Further, the speed reducer 803 is provided with a lock mechanism, and the spring winding mechanism output shaft 806 can be fixed by the lock mechanism. The control unit 804 controls the rotation of the motor 802 and the lock mechanism of the speed reducer 803.

  The spring winding mechanism output shaft 806 is an output shaft of the speed reducer 803 and is rotated by the driving force of the motor 802 and exhibits the ability to wind the spiral spring 807. Further, when the lock mechanism of the speed reducer 803 is turned ON, the spring winding mechanism output shaft 806 is locked so as not to rotate.

  An inner end (end of the central portion) 807a of the spiral spring 807 is fixed to the spring winding mechanism output shaft 806, and an outer end 807b thereof is engaged with the protrusion 809a of the assist arm 809.

  One end of the assist arm 809 is pivotally supported by the spring winding mechanism output shaft 806 at the pivotal support portion 810 in a rotatable state. A roller 811 is pivotally supported on the other end of the assist arm 809 in a rotatable state. The periphery of the roller 811 is covered with rubber, and that portion is in contact with the door surface 103a.

  The door knob 812 is used to open and close the door 103. By operating the door knob 812, the door 103 can be rotated about the rotation center axis 110 of the door hinge 111.

  The spring zero position detection sensor 813 is a sensor that detects a state where the spiral spring 807 is not wound. This detection is performed when the tip position of the spring rotation state indicating piece 816 fixed to the spring winding mechanism output shaft 806 is close to the sensing element arranged at the tip of the spring zero position detection sensor 813. Examples of the sensing element include a microswitch, a magnetic detection element, and a light detection element.

  The spring winding angle sensor 814 is a sensor that detects whether or not the spiral spring 807 is wound to a predetermined degree. Further, the assist end position detection sensor 815 is a sensor that detects the timing when the assist of the opening operation of the door 103 by the function of the spiral spring 807 ends. The detection mechanism in the spring winding angle detection sensor 814 is the same as that in the spring zero position detection sensor 813, and the detection mechanism in the assist end position detection sensor 815 is performed by detecting the proximity of the protrusion 807b.

3-2. Operation of Third Embodiment First, when the door 103 is closed (the state shown in FIG. 8B), the motor 802 is rotated, the spring winding mechanism output shaft 806 is rotated, and the spiral spring 807 is wound. I do. At this time, the outer end 807b of the spiral spring 807 is engaged with the protrusion 809a of the assist arm 809, and the assist arm 809 is in a state where it cannot rotate (turn). Therefore, the spiral spring 807 is wound. Thus, the spring winding mechanism output shaft 806 rotates counterclockwise as viewed from above, and the repulsive force is stored in the spiral spring 807.

  In this state, the repulsive force of the spiral spring 807 is applied to the protrusion 809a of the assist arm 809, and this force rotates the assist arm 809 in the direction indicated by the arrow 819 with the shaft support 810 as an axis. It will be the power to try. That is, in a state where the door 103 is closed, a state where the roller 811 pushes the door surface 103a is obtained.

  In this state, if the door knob 812 is operated to release the lock mechanism of the door 103 (not shown) and the door 103 is rotated in the direction of the arrow 819, the above-described force that the roller 811 pushes the door surface 103a is applied. 103 opening operation is assisted. That is, the assist arm 809 tries to rotate about the spring winding mechanism output shaft 806, and the force due to this rotation is transmitted to the door surface 103a via the roller 811, and the operation to open the door 103 is assisted. Is done. In this manner, the same door opening operation assistance as in the first embodiment is performed.

  The mechanism shown in the present embodiment can perform the same operation as in the first embodiment. That is, it is possible to perform an operation according to the procedure shown in FIG. And the same operation effect as a 1st embodiment can be obtained.

  In the present embodiment, the usage of the spiral spring is different from that in the first embodiment. That is, in the first embodiment, when the end of the spiral spring is fixed by the assist arm and the repulsive force stored in the spiral spring is released, the end of the spiral spring is used as the fulcrum. The assist drive shaft fixed to the section is rotated. The rotation of the assist drive shaft is transmitted to the pinion shaft of the door closer, thereby assisting in the door opening operation.

  On the other hand, in the present embodiment, the inner end of the spiral spring is fixed to the spring winding mechanism output shaft, and the spring winding mechanism output shaft is rotated to wind the spiral spring and rebound stored in the spiral spring. By releasing the force, the assist arm engaged with the outer end of the spiral spring is rotated (turned). Then, the door surface is pushed using the force generated by the rotation of the assist arm to assist the door opening operation.

  The present invention can be used as an auxiliary device for assisting an opening force when opening an opening door.

It is a front view which shows the outline | summary of the door which attached the opening assistance apparatus. It is a top view which shows the outline | summary of the door which attached the opening assistance apparatus. It is a top view explaining the effect | action of a door opening auxiliary | assistance apparatus. It is a top view explaining the effect | action of a door opening auxiliary | assistance apparatus. It is a flowchart explaining the control procedure of a door opening auxiliary | assistance apparatus. It is a graph which shows the result of having measured the effect of a door opening auxiliary device. It is the top view (A), front view (B), and side view (C) which show the outline | summary of the door which attached the opening assistance apparatus. It is the top view (A) and front view (B) which show the outline | summary of the door which attached the door opening auxiliary | assistance apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101 ... Door opening auxiliary device, 102 ... Door closer, 103 ... Door, 103a ... Door surface, 104 ... Door frame, 105 ... Arm part, 106 ... Arm, 107 ... Arm, 108 ... Door closer side pivot support part, 109 ... Door frame side Axis support, 109a ... Door frame side support flange, 110 ... Rotation center axis of door hinge 111, 111 ... Door hinge, 112 ... Power switch, 121 ... Spiral spring, 122 ... Outer end of spiral spring, 123 ... Spiral spring Inner end (center portion), 124 ... assist arm, 125 ... spring winding mechanism output shaft, 126 ... drive mechanism, 127 ... motor, 128 ... drive control unit, 129 ... assist drive shaft, 130 ... assist drive shaft rotation state Indicating piece 161 ... rack, 164 ... pinion, 165 ... pinion shaft, 166 ... compression spring, 171 ... door opening / closing detection sensor, 1 2 ... Opening force assist end position detection sensor, 173 ... Spring winding angle detection sensor, 174 ... Zero position detection sensor, 801 ... Door opening assist device main body (case main body), 802 ... Motor, 803 ... Decelerator, 804 ... Control unit, 806 ... spring winding mechanism output shaft, 807 ... spiral spring, 807a ... end inside spiral spring, 807b ... end outside spiral spring, 809 ... assist arm, 809a ... projection 809a, 810 ... shaft Support section, 811... Roller, 812. Door knob, 813. Spring zero position detection sensor, 814. Spring winding angle detection sensor, 815. Assist end position detection sensor, 816.

Claims (10)

A spring having a rotating shaft and storing a repulsive force against the rotation of the rotating shaft;
An assist drive shaft that is fixed to one end of the spring and rotates to store a repulsive force by rotating, and further rotates following the opening and closing of the door;
A spring winding mechanism output shaft supported in a rotatable state with respect to the door body;
An assist arm having one end fixed to the output shaft of the spring winding mechanism,
When the door is closed,
The other end of the assist arm is engaged with the other end of the spring,
By rotating the spring winding mechanism output shaft, the assist arm rotates and the spring stores a repulsive force,
When opening the door,
The door opening assisting device according to claim 1, wherein the spring releases the repulsive force and exerts a driving force with respect to the assist driving shaft with a hooking portion with the assist arm as a fulcrum. When the door is closed from the open state,
2. The door opening according to claim 1, wherein the assist arm is engaged with an end of the spring, and the spring winding mechanism output shaft is further rotated to store a repulsive force in the spring. 3. Door auxiliary device. A spring having a rotating shaft and storing a repulsive force against the rotation of the rotating shaft;
A spring winding mechanism output shaft fixed to one end of the spring and rotating to store a repulsive force by rotating;
An assist arm that engages with the other end of the spring and rotates the other end when the spring releases a repulsive force, and assists in opening the door using the rotation of the other end of the assist arm. A door opening assist device characterized by The main body of the door opening assist device is fixed to the door,
A door closer is attached to the door,
The door opening assist device according to claim 3, wherein the opening of the door is assisted by the other end of the assist arm pressing the arm of the door closer. The main body of the door opening assist device is fixed to the door frame,
The door opening assist device according to claim 3, wherein the other end of the assist arm assists the opening operation of the door by pushing the door surface. When the door is closed from the open state,
The repulsive force is stored in any one of claims 1 to 5, wherein the assist arm is engaged with the end of the spring, and the spring winding mechanism output shaft is further rotated. A door opening assist device as described.   The door opening assisting device according to any one of claims 1 to 6, wherein the spring is a spiral spring, a torsion spring, or a coil spring. A lock mechanism for fixing the spring winding mechanism output shaft;
When opening the door,
The spring winding mechanism output shaft is fixed by the lock mechanism,
With the door open,
The lock mechanism is released or the engagement of the assist arm is released,
The door opening assist device according to any one of claims 1 to 7, wherein the spring does not exhibit a driving force for opening the door.   9. The door opening assist device according to claim 8, wherein the release of the lock mechanism or the release of the engagement is performed at a stage when a predetermined time has elapsed from the start of the door opening operation.   The door opening assist device according to claim 8, wherein the release of the lock mechanism or the release of the engagement is performed when the door reaches a predetermined open state.

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