JP4394089B2 - Door opening and closing device - Google Patents

Description

  The present invention is provided between a door that is swingable around a vertical axis and a fixing member for supporting the door, and is stored when the door is opened when the door is changed from an open state to a closed state. The present invention relates to a door opening and closing device provided with a door closer for operating the door to the closing side using the generated energy.

  Many door opening and closing devices have been proposed that automatically open and close using the driving force of an electric motor. For example, connect the other end of the fixed side arm, one end of which is connected to the upper end of a vertically long rectangular door frame via a bracket, and the other end of the door side arm, which is connected to the door side, via a pin. The other end of the door side arm is connected to the upper end of a rotating shaft protruding up and down from the casing constituting the door closer body provided on the door side to form a door closer, and the lower end of the rotating shaft The door is connected to an electric motor with a speed reduction mechanism disposed below the rotating shaft through a connecting means, and includes an energization control circuit for the electric motor to control energization to the electric motor. Can be opened and closed using the driving force of the electric motor (see, for example, Patent Document 1).

Moreover, in the thing of the said patent document 1, since the electric motor which has the output shaft which rotates concentrically is interlockingly connected with the lower end of the rotating shaft of a door closer, an electric motor will protrude large below the door closer. . In order to solve this problem, the housing that is placed in contact with the bottom of the casing constituting the door closer main body is formed in a horizontally long and flat shape, and the speed reduction mechanism and the electric motor are arranged in the housing in the horizontal direction and are below. The protrusion to the side can be reduced (see, for example, Patent Document 2).
JP 2000-96915 A (see FIG. 1) Japanese Patent Laid-Open No. 2003-106047 (see FIGS. 1 and 2)

In the configuration of the above two patent documents, the rotation shaft of the door closer body and the electric motor are linked by a large number of gears constituting the speed reduction mechanism, so that only vibration and noise during driving are large. In addition, it must be periodically treated with a lubricating oil, which is disadvantageous in terms of cost.
In any case, since the electric motor and the speed reduction mechanism including a large number of gears must be assembled with high accuracy on the rotation shaft of the door closer body, the assembling work is troublesome.

  In view of the above-mentioned situation, the present invention intends to solve the problem of providing a door opening / closing device that can suppress vibration and noise during driving to a small extent and that is advantageous in terms of assembly that does not require assembly accuracy. And

In order to solve the above-mentioned problem, the door opening and closing device of the present invention is provided between a door that can swing and open around a vertical axis and a fixing member for supporting the door. A door closer for operating the door to the closing side using the energy stored when the door is opened in accordance with the change to the closed state, and a rotation shaft of the door closer linked to the opening / closing operation of the door so as to be integrally rotatable. An attached driven pulley, a string-like body having one end wound around the driven-side pulley, and a drive-side pulley around which the other end of the string-like body is wound and driven and rotatable by a driving device, When opening the door, by driving the driving device and rotating the driving pulley, the string-like body wound around the driven pulley is pulled out and wound around the driving pulley. The rotation shaft A structure for rotating the release side, the length of the string-like body wound around at least one of said drive pulley and the driven pulley is set to a length exceeding one turn of the pulley, said drive pulley In addition, the width of the driven pulley is set to a dimension in which a plurality of the string-like bodies cannot be wound in a parallel state .
Even if the drive pulley that can be driven and rotated by the drive device is not attached to the preset installation position with high precision, the error in the installation position is a string. Not only can it be absorbed by the body, but large vibrations and loud noises are not generated when the drive device is driven when the door is opened.
As described above, when the driving device is driven to rotate the driving pulley, the string-like body wound around the driven pulley is pulled out and taken up by the driving pulley, so that the rotating shaft is opened to the door. It will be rotated to the open side.
As the material of the string-like body, synthetic resin is optimal in terms of vibration and noise, but metal wire or the like may be used.
The length of the string-like body wound around at least one of the driving pulley and the driven pulley is set to a length exceeding one turn of the pulley. The length exceeding one turn of the pulley here is the length before winding without adding the length of the string-like body necessary for rotating the rotating shaft to open the door, for example, the driven side In the state where the string-like body wound around the pulley is wound around the driving pulley, the length of the length wound up to more than one turn of the pulley is added.
Further, the widths of the driving pulley and the driven pulley are set to dimensions that cannot be wound up in a state where a plurality of the string-like bodies are arranged in parallel.

  A flange portion protruding in the radial direction of the pulley is provided on each outer peripheral edge on both sides in the rotational axis direction of each of the driving pulley and the driven pulley, and at least one of the two flange portions of each pulley is provided with the string. You may make it provide the through-hole set to the magnitude | size which can penetrate a shape body.

  A tension mechanism may be provided between the driven pulley and the driving pulley for preventing slack of the string-like body that occurs between them.

  The driving pulley may be disposed at the same height as the driven pulley at the top of the door, and the driving device may be disposed immediately below the driving pulley.

  The driving pulley and the driven pulley may be arranged so that their axes are parallel to each other, and the string-like body may be wound around the pulleys so as to rotate in reverse.

  The tension mechanism is composed of an arm disposed between the pulleys and urged to rotate in one direction, and rollers attached to both ends of the arm, and a string-like body positioned between the two rollers. At least one of the rollers may be pressed against the string-like body to prevent the string-like body from slackening.

In the door opening / closing range, the rotation center of the driven pulley may be set such that the outer peripheral edge where the rotation radius of the displaced driven pulley is maximized is not located on the wall surface side .

By constructing the other end of the string-like body, one end of which is wound around a driven pulley attached to the rotating shaft so as to be rotatable together, around the driving pulley, the electric motor and the rotating shaft of the door closer are connected to a large number of gears. This eliminates the need for precise positioning required when interlocking with the, so that the assembling work can be facilitated. In addition, with the configuration in which the string-like body is simply wound around both pulleys, the vibration and noise generated when the string-like body is wound up (during driving) are as much as possible compared to the vibration and noise generated when the gears are engaged. In addition, the periodic maintenance (adding lubricating oil, etc.) required in the case of gears becomes unnecessary, which is not only advantageous in terms of use, A pulley with less vibration is more advantageous in terms of durability due to vibration generated when the gears mesh.
Further, for example, compared to the case of a configuration driven by a chain interlocking mechanism, the configuration with the string-like body has an advantage that the flexibility is high and the degree of design freedom can be increased.
Further, by forming the string-like body from a synthetic resin, it is further advantageous in terms of reducing vibration and noise or reducing the pulley diameter compared to a metal wire or the like. By constructing the string-like body from a bundle of a large number of high-strength fibers (polymer fibers) such as aramid fibers, it is possible to improve the durability of the pulley diameter as compared with the synthetic resin. There is an advantage that the size can be further reduced.

  The length of the string-like body wound around at least one of the driving pulley and the driven pulley is set to a length exceeding one turn of the pulley, thereby fixing the end of the string-like body to the driving pulley. Even if the drive pulley is extended to the maximum, it is possible to maintain a state where a string-like body having a length exceeding one turn of the pulley is wound, It is possible to avoid the hanging string-like body from being unwound along with the driving of the driving pulley, and the assembling work can be performed more quickly than the configuration in which the end of the string-like body is fixed.

  Maintaining the winding state (posture) in the same state by setting the widths of the driving pulley and the driven pulley to a dimension in which a plurality of string-like bodies cannot be wound in a parallel state. Thus, the string-like body can be wound and pulled out smoothly and reliably, and the durability and operation stability can be improved. At this time, if the string-like body having a length exceeding one turn of the pulley is maintained while the string-like body is pulled out, the tension of the string-like body applied between the pulleys is maintained. Thus, it is possible to reliably prevent the wound string-like body from being unwound by the tightening force (frictional force) acting on the portion where the string-like bodies overlap each other.

  A flange portion protruding in the radial direction of the pulley is provided on each outer peripheral edge on both sides in the rotational axis direction of each of the driving pulley and the driven pulley, and at least one of the two flange portions of each pulley is provided with the string. By providing a through-hole that is set to a size that allows the string-like body to pass therethrough, the string-like body can be fixed to the flange portion by passing the string-like body through the through-hole, and the string-like body is fixed. There is an advantage that can be done quickly. In addition, when the through holes are provided in both flange portions, the string-like body can be penetrated from either side, and the assembly of the pulley is not affected by the assembly (mounting) direction of the pulley. Work can be done quickly.

  If a tension mechanism is provided between the driven pulley and the driving pulley to prevent the slack of the string-like body generated between them, the door is opened by driving the driving pulley, for example. Even if the door is opened at a speed higher than the opening speed by manual force during operation, or even if the electric motor stops during operation due to a power failure or failure, it occurs in the string. The slack can be absorbed by the tension mechanism, the winding of the string-like body between the pulleys can always be stably performed, and the winding-up failure of the string-like body does not occur for a long period of time. Can be used well.

  By arranging the driving pulley at the same height as the driven pulley at the upper part of the door and arranging the driving device directly below the driving pulley, the driving device largely protrudes downward. Can be suppressed.

  By arranging the driving pulley and the driven pulley so that their axes are parallel to each other and winding the string-like body so that the pulleys rotate in reverse to each other, The tension mechanism can be placed closer to the line connecting the center lines of both pulleys than the one wound around the pulley from the same side, so that the entire device can be prevented from being enlarged in the horizontal direction. .

  The tension mechanism is composed of an arm disposed between the pulleys and urged to rotate in one direction, and rollers attached to both ends of the arm, and a string-like body positioned between the two rollers. Even when the slack of the string-like body is large by preventing at least one of the rollers from being pressed against the string-like body, the arm rotates and presses the two rollers against the string-like body. Thus, the large slack can be reliably absorbed and the winding operation between the pulleys can be performed satisfactorily.

In the door opening / closing range, by setting the rotation center of the driven pulley so that the outer peripheral edge where the rotation radius of the displaced driven pulley is maximized is not located on the wall surface side, The driven pulley can be arranged close to the door, the amount of protrusion from the door can be suppressed, and the overall size of the apparatus can be further reduced.

  1 and 2 (a) and 2 (b) show a door opening and closing device for automatically opening and closing the door 1 using the electric force of an electric motor M as a driving device. This is provided between the door 1 that can swing and open around the vertical axis X and a door support door frame 2 that is a fixing member for supporting the door 1. The door closer 3 for operating the door 1 to the closing side using the energy stored when the door is opened in accordance with the change from the door to the closed state, and the rotation axis of the door closer 3 interlocked with the opening / closing operation of the door 1 4, a driven pulley 5 that is attached to the driven pulley 5, a string-like body 6 having one end wound around the driven-side pulley 5, and the other end of the string-like body 6 is wound around the pulley 5. When the door 1 is opened, the driven pulley 5 is driven by rotating the drive pulley 7 by driving the electric motor M. The wound string-like body 6 is pulled out and the By winding the dynamic pulley 7, the rotary shaft 4 and it is capable of rotating to the door opening side. In FIG. 1, a door opening position opened 90 degrees indicated by a one-dot chain line and a door opening position opened 180 degrees indicated by a two-dot chain line from a door closing position indicated by a solid line are shown. Is not to be done.

The door closer 3 is a circular bar-shaped link with one end connected to the upper end of the vertically long rectangular door frame via a bracket 8 (consisting of a number of members so that the length can be adjusted). 9, a door-side swing arm 10 having one end connected to the other end of the link 9, and a door closer body 12 having the rotating shaft 4 to which the other end of the swing arm 10 is connected. However, other configurations may be used.
The door closer body 12 has a rectangular parallelepiped shape that is long in the horizontal direction and has a box-shaped casing 13 that is open on the door surface side, the rotary shaft 4 that passes through a pair of upper and lower plates constituting the casing 13, and the casing. 13, a general oil type for converting the energy stored when the door 1 is opened to the rotational force of the rotary shaft 4 when the door 1 is closed when the door 1 is changed from the open state to the closed state. Conversion mechanism (not shown).

The oil type conversion mechanism includes a piston and a coil spring for energizing the piston in a cylinder chamber provided in the interior of the door closer body 12 along the longitudinal direction thereof. The energy accumulated by compressing is used for the operation force toward the closing side of the door 1. The closing speed of the door 1 can be adjusted by changing the oil flow rate by adjusting the size of the cross-sectional area of the oil passage provided in the cylinder with a speed adjusting screw or the like. Instead of the oil type, a mechanical type without oil may be used, and the configuration for operating the door 1 to the closed side may be any configuration.

  Both the swing arm 10 and the driven pulley 5 are attached to the rotary shaft 4 by fitting vertically in the axial direction thereof, and the driven pulley 5 protrudes upward from the casing 13. The outer end of the door side arm 10 can be externally fitted to the upper end of the rotary shaft 4 protruding from the driven pulley 5 so as to be integrally rotatable. ing. Accordingly, by driving the electric motor M, the driven pulley 5 is rotated via the string-like body 6 to rotate the rotating shaft 4, so that the swing arm 10 is rotated around the vertical axis Y of the rotating shaft 4. The door 1 can be opened to 90 degrees or 180 degrees (maximum opening) as shown in FIG. 1 while the link 9 is swung around the vertical axis W of the bracket 8 in conjunction with this. It can be done.

  As shown in FIGS. 2 and 3, the electric motor M is composed of a DC guard motor including a motor body 14 and a speed reduction mechanism portion 15 connected to the motor body 14. Also good. Then, with the output shaft 16 of the electric motor M facing upward, the speed reduction mechanism portion 15 is moved upward through a through-hole formed in the lower plate portion of the U-shaped support member 17 that opens to the door side, The lower end of the upper plate portion of the support member 17 is fixed with four bolts 11 in a state where the upper end (tip) of the speed reduction mechanism portion 15 is abutted, and the through plate hole formed in the upper plate portion is used for the fixing. The output shaft 16 protrudes upward. The drive-side pulley 7 is externally fitted to the output shaft 16 so as to be integrally rotatable. One end of the string-like body 6 is wound around the drive-side pulley 7, and the other end of the string-like body is connected to the drive-side pulley. 7 is wound around the driven pulley 5 at the same height in the vertical direction. Here, the driving pulley 7 and the driven pulley 5 are arranged so that their axes are parallel to each other, and the pulleys 7 and 5 are arranged at the same height position, but the position in the vertical direction ( The height may be changed.

The string-like body 6 includes aramid fibers, which are high-strength fibers (polymer fibers), such as many kevlars (trade name registered by DuPont), and a circular cross section (such as a square or an ellipse). However, it may be made of various fibers, synthetic resins, or the like. By using such a string-like body, not only can it be unnecessary to periodically inject the lubricant required when it is constituted by a metal gear, a metal chain, etc., but the deterioration of the lubricant There is an advantage that it is not necessary to consider problems such as metal corrosion. The string-like body 6 having the above configuration is particularly advantageous with respect to vibration and noise, but may be a metal wire or the like. The aramid fiber has high tensile strength and frictional resistance so that other fibers cannot be tracked, and can support a weight of 320 kg with a thread having a cross-sectional area of 1 mm ² and a specific gravity of 1.45. Since the strength is small and much stronger than metal when compared in strength, even a single string-like body 6 can be provided with sufficient strength.
FIG. 9 shows a specific configuration of the string-like body 6. That is, a cylindrical cover 6A in which a large number of fibers (for example, polyester fibers) 6a having a larger elasticity than the aramid fibers 6b are knitted into a mesh shape so that the aramid fiber bundle 6B obtained by bundling a large number of aramid fibers 6b does not fall apart. It shows what has been covered with.

  As shown in FIGS. 2A, 2B and 3, the support member 17 and the casing 13 are attached to a horizontally long vertical plate 18, and the vertical plate 18 is attached to the upper end of the inner surface (back surface) of the door 1. In addition, the support member 17 is arranged on the vertical axis side of the door 1 and arranged as close to the vertical axis side as possible so as not to obstruct as much as possible. It may be. K shown in FIG. 2B is a cover for covering the electric motor M, the door closer body 12, the two pulleys 5, 7 and the string-like body 6.

  As shown in FIGS. 4 and 5, flanges 7A, 7A and 5A, 5A projecting in the radial direction of the pulleys are provided on the outer peripheral edges on both sides in the rotational axis direction of the driving pulley 7 and the driven pulley 5, respectively. A plurality of the string-like bodies 6 are in a parallel state with the winding width P of the driving pulley 7 and the driven pulley 5 formed between the flange portions 7A, 7A and 5A, 5A. It is set to a dimension that cannot be wound, that is, a width dimension that is equal to or slightly larger than the width (thickness) of one string-like body 6, and the string-like body 6 is attached to the driving pulley 7 and the driven pulley 5. As shown in FIG. 4, the length to be wound while being stacked in one row may be a length of one and a half turns (may be more than one and a half turns, or in some cases, a length slightly exceeding one turn may be sufficient. ) To set the driving pulley 7 and the driven Even if the end of the string-like body 6 is not fixed to the pulley 5, the string-like bodies (half-length string-like bodies) are formed by the tension of the string-like body 6 applied between the pulleys 7 and 5. Winding around the driving pulley 7 and the driven pulley 5 by the tightening force (frictional force) acting on the length of the overlapped portion (the overlapping portion is preferably half or more, but it may be overlapped as much as possible) It is possible to reliably prevent the formed string-like body 6 from unraveling. The length of one and a half turns is a length that does not add the length of the string-like body 6 necessary for rotating the rotary shaft 4 to open the door 1, that is, in a state where no winding is performed. For example, in a state where the string-like body 6 wound around the driven pulley 5 is wound around the drive-side pulley 7, the string-like body 6 wound up to a length exceeding one and a half turns of the pulley 7 The length of is an extra plus length.

  Further, as shown in FIG. 5, through-holes 5K and 7K are set in the flanges 5A, 5A, 7A and 7A of the pulleys 5 and 7 so as to be able to penetrate the string-like body 6. Then, just passing the string-like body 6 through one of the through-holes 5K, 5K, 7K, 7K 5K, 7K, the through-holes 5K, 7K in the direction orthogonal to the direction in which the string-like body 6 is wound. So that the string-like body 6 is not pulled by being pulled into the pulley. The through holes may be formed not on the flange portions but on the body portions 5B and 7B around which the through holes are wound. Also, as shown in FIG. 6, a C-shaped (any shape) locking member 19 is attached to the string-like body 6 protruding from the through holes 5K, 7K, and the string-like body 6 It may be possible to reliably prevent movement from the through holes 5K and 7K into the pulley. Even when the locking member 19 is attached, if the length for winding the string-like body 6 around the pulley is set to a length exceeding one turn as described above, the string-like body 6 is attached to the locking member 19. The tensile force does not act, and it can be used satisfactorily for a long time.

  As shown in FIGS. 7A to 7C, the string-like body 6 is wound around the drive side pulley 7 so that the drive side pulley 7 and the driven side pulley 5 are rotated in the opposite directions. The string-like body 6 is configured to go back and forth between the side of the outer peripheral edge that approaches the door 1 and the side of the outer peripheral edge of the driven pulley 5 that moves away from the door 1. A tension mechanism 20 is applied to the string-like body 6 located from the door side so that the slack of the string-like body 6 generated between the driven pulley 5 and the driving pulley 7 can be prevented. I have to. As described above, the tension member 20 is partly or entirely inserted into the space formed between the pulleys 7 and 5 by slanting the string-like body 6 between the pulleys 7 and 5. There is an advantage that the apparatus can be downsized accordingly, but both the pulley 7 from the same side, for example, the door side 1, so that both the driving pulley 7 and the driven pulley 5 rotate in the same direction. , 5 may be configured so that the string-like body 6 is wound around each.

As shown in FIGS. 2 (a) and 2 (b), the tension mechanism 20 is disposed between the pulleys 7 and 5 and close to the drive pulley 7, and is urged to rotate in one direction. Rollers 22 and 23 in which locking grooves 22A and 23A are formed on outer peripheral surfaces to which flat plate-like rectangular arms 21 in plan view and string-like bodies 6 attached to both ends of the arms 21, respectively, are locked. Thus, at least one roller 22 is pressed against the string-like body 6 positioned between the two rollers 22 and 23 to prevent the string-like body 6 from slackening.
Further, the central portion of the arm 21 in the longitudinal direction is attached to the upper end protruding portion of the support shaft 24 provided in a state of penetrating the support member 17 in the vertical direction so as to rotate integrally around the vertical axis V, and The shaft 24 is mounted on the shaft 24 and disposed in the support member 17, and the both ends of the support shaft 24 are locked and held across the upper end of the support shaft 24 and the lower portion of the support member 17. A coil spring 25 is provided so as to urge counterclockwise, and the arm 21 is configured to urge counterclockwise in a plan view. However, other configurations may be used.

  As shown in FIG. 2A and FIGS. 7A to 7C, the rotation center 5S of the driven pulley 5 is moved from the start of feeding of the string-like body 6 wound around the pulley 5 to the end of feeding. (The rotation angle from 0 degree of rotation corresponding to the door closing position in FIG. 7 (a) to 120 degree rotation angle corresponding to the maximum door opening position in FIG. 7 (c)) excludes the feeding radius. It is deviated so as to be larger than the non-feeding-out radius (a rotation angle irrelevant to opening and closing of the door from 121 degrees to 360 degrees). The feeding radius refers to feeding of the string 6 of the driven pulley in a rotation range (basically a range of up to 180 degrees) in which the driven pulley 5 is rotated to feed the string of the driven pulley. The length (radius) of the straight line connecting the side start end and the rotation center, and the non-feeding radius means the radius of the driven pulley 5 other than the rotation range (here, 0 to 120 degrees). The rotation radius L from the displaced rotation center 5S is longer than the rotation radius L1 when the rotation center is the center of the circle. In this way, by gradually increasing the rotational torque of the driven pulley 5 from the start of rotation, it is possible to cope with the tensile force of the string-like body 6 that increases with the rotation of the driven pulley 5, The force for rotating the driven pulley 5 during the period from the start to the end of the body 6 can be rotated with a substantially uniform pulling force. Specifically, as shown in FIGS. 8A and 8B, the rotation radius L becomes maximum when the rotation angle L is rotated by a predetermined angle (approximately 25 degrees in the drawing) from the start of rotation. It is possible to prevent the rotational torque (rotational force) from maximizing and the pulling force of the string-like body 6 from increasing as the driven pulley 5 rotates. This is because the rotational radius L is inversely proportional to the rotational force, and therefore the tensile force of the string-like body 6 is determined by setting the rotational radius L in accordance with the torque curve of the driven pulley 5 required for the rotation of the rotating shaft 4. Can be made substantially uniform or gradually increased in the range from the start of rotation (door closed position) to the end of rotation (maximum open position of the door). Here, it is described that the door 1 is set to the maximum opening degree by using the electric force of the electric motor M up to 120 degrees, but actually the driven pulley 5 is set to 50 degrees (the door 1 at this time) as described later. May be rotated by using an electric force up to 35 degrees), and the angle at which the driven pulley 5 is driven to rotate may be any number.

  Further, in the rotation range of the driven pulley 5 corresponding to the maximum opening position of the door shown in FIGS. 7 (a) to 7 (c) corresponding to the closed position of the door 1, the displaced driven pulley 5 is displaced. Rotation of the driven pulley 5 so that the outer peripheral edge where the rotation radius L is maximum is not located on the wall surface (rear surface) side of the door 1, that is, on the side away from the wall surface of the door 1. By setting the center 5S, the driven pulley 5 is prevented from protruding greatly from the door 1 to the side away from the door 1 side.

  A rotary encoder 26 for detecting the rotational displacement (rotation angle) of the rotary shaft 4 and grasping the opening / closing position (opening / closing angle) of the door 1 is provided. As shown in FIGS. 2B and 12, the rotary encoder 26 is attached to the lower end of the rotary shaft 4 so as to rotate integrally, and has a plurality of light transmitting notches 27A formed on the outer peripheral edge. A plate-shaped slit plate 27, a light emitting diode that irradiates light toward the notch of the slit plate 27, and a phototransistor for receiving light from the light emitting diode are placed opposite to each other with the slit plate 27 interposed therebetween. It is comprised from the U-shaped support member 28 supported in the state. Therefore, by detecting the number of times the light from the blocked light emitting diode is received by the phototransistor through the notch and the time until the light is received, the rotation angle and the rotation speed are detected in addition to the rotation position of the rotation shaft 4 Be able to. The support member 28 is attached to an L-shaped plate 29 fixed to the lower surface of the casing 13. Instead of the rotary encoder 26, a potentiometer may be used.

In addition to the rotary encoder 26, a limit switch 30 is provided as a contact type sensor for detecting that the rotary shaft 4 has rotated a set angle (here, 90 degrees). The limit switch 30 is attached to a vertical plate portion 29A constituting the plate 29 in a state where the limit switch 30 is positioned in the vicinity of the slit plate 27, and a protruding piece 27T integrally formed at one place on the outer peripheral edge of the slit plate 27. Is brought into contact with the switch portion 30A of the limit switch 30 by the rotation of the slit plate 27, thereby detecting that the rotating shaft 4 has rotated the set angle (here, 90 degrees).
Instead of the protruding piece 27T, as shown in FIGS. 13A and 13B, another plate-like contact member 31 can be attached to the rotary shaft 4 so as to be integrally rotatable.

  By reducing the supply voltage to the electric motor M based on the detection information of the rotary encoder 26 and the limit switch 30 to change the driving speed of the electric motor M (low speed), or by applying a brake to the electric motor M A control device (not shown) is provided with control means for holding the door 1 in the open position by balancing with the energy to the closing side of the door 1 by the door closer 3 acting on the rotating shaft 4. The drive control will be described. For example, when the rotation angle of the rotary shaft 4 from the rotary encoder 26 is detected, it corresponds to a preset maximum opening angle of the door 1 (for example, 35 degrees, but may be set any number of times). When the rotary encoder 26 detects that the rotation angle of the rotating shaft 4 (in this case, approximately 50 degrees is determined by the lengths of the link 9 and the swing arm 10), for example, electric By lowering the output voltage to the motor M or applying a brake to the electric motor M, the door closer 3 of the door 1 acting on the rotating shaft 4 is balanced with the energy to the door 1 closing side, and the door 1 is moved to its open position. Can be positioned at. For example, when the door 1 cannot be stopped at the open position due to erroneous detection or disconnection of the rotary encoder 26, that is, the drive speed of the electric motor M cannot be changed, or the electric motor M is braked. If the limit switch 30 detects that the rotation shaft 4 has rotated 90 degrees or more, the driving of the electric motor M is forcibly stopped or the driving speed of the electric motor M is again detected. Or the brake can be applied to the electric motor M.

  More specifically, first, an output signal when a door opening switch (not shown) is operated to the open side, or a non-contact type sensor (not shown) that detects that a person approaches the door 1. ) Is input to the control device, a drive signal to the open side is output to the electric motor M. Then, as shown in FIG. 10 (a), the driving pulley 7 in the rotational position corresponding to the closed position of the door 1 is driven to rotate counterclockwise in plan view. If the string-like body 6 is slack (loosened) at the start of the driving rotation, the roller 22 of the tension mechanism 20 can press the string-like body 6 to eliminate the slack, as shown in FIG. I am doing so. When the drive rotation is continued and the driven pulley 5 rotates by 50 degrees, an ON signal is output from the rotary encoder 26 to the control device, and it is determined that the door 1 is opened to the open position of 35 degrees. By reducing the output voltage to the electric motor M as described above and controlling the driving speed of the electric motor M, the electric motor M is balanced with the energy toward the closing side of the door 1 by the door closer 3 acting on the rotating shaft 4. Thus, the rotation of the rotating shaft 4 stops (see FIG. 10C). When the door 1 located at 35 degrees is forced to swing open with a manual operation force to an angle exceeding 35 degrees, that is, 180 degrees, the driving pulley 7 is stopped. Even if the driven pulley 5 is further rotated (the driven pulley 5 rotates 120 degrees at this time) and the string-like body 6 is fed out, as shown in FIG. When the two rollers 22 and 23 constituting the mechanism 20 press the string-like body 6, the large slack generated in the string-like body 6 can be eliminated.

  11 (a), (b), and (c), when the electric motor M is not driven or when a power failure occurs, the door 1 is opened to the maximum open position (180 degrees in this case) only with manual force. It shows the state to go. In this case as well, the driven pulley 5 rotates and the string-like body 6 is fed out while the driving pulley 7 is stopped, but the arm 21 is biased in accordance with the feeding length. The slack of the string-like body 6 can be absorbed by the contact action of the two rollers 22 and 23. A point A shown in FIGS. 10 and 11 is given on the drawing in order to clarify the rotational position of the driving pulley 7, and FIGS. 10 (a) and 10 (b) and FIGS. FIGS. 10B and 10C show the state immediately before the drive side pulley 7 rotates, and FIGS. 10C and 10D show the state where the drive side pulley 7 has rotated 50 degrees.

  For example, when the door 1 is closed immediately or after a set time from the state in which the door 1 is opened at the set angle (35 degrees in this case) by the electric motor M and the open position is maintained as described above, for example, The switch 6 is turned to the driven pulley 5 side by rotating the electric motor M in the reverse direction by pressing a switch or detecting that a person has moved away from the door 1 by a non-contact sensor or the like. By extending or stopping the driving of the electric motor M, the door 1 is swung to the closed position using the energy accumulated in the door closer body 12. At this time, when the electric motor M is in a stopped state due to a power failure or failure, or when the rotational speed of the driving pulley 7 by the electric motor M is slower than the rotational speed of the driven pulley 5, the tension mechanism 20 Thus, the slack of the string-like body 6 can be absorbed.

Further, when the door 1 is closed, when the electric motor M is switched to the stop state as described above without being driven in reverse, as shown in FIG. 14, the output shaft of the electric motor M and the driving pulley 7 are used. If an electromagnetic (or hydraulic) clutch 32 for intermittently transmitting power to the rotary shaft 4 is provided, and the clutch 32 is controlled to be in a disengaged state, a driven Since the resistance force by the electric motor M generated when the side pulley 5 rotates can be eliminated, there is an advantage that the door 1 can be swung quickly.
In FIG. 14, the electric motor M is attached to the upper part of the back surface of the door 1 in such a manner that the longitudinal direction thereof is along the left-right width direction of the door 1, and the driven pulley is attached to the rotating shaft 4 of the door closer body 12 in an integrally rotated state. A pulley 33 for guiding the other end side of the string-like body 6 having one end wound around 5 to the lower side, and a driving pulley 7 around which the string-like body 6 guided by the pulley 33 is wound, An output shaft 34 of the clutch 32 connected to the output shaft of the electric motor M is attached to rotate integrally. The pulley 33 includes a wheel 33A for locking and guiding the string-like body 6, and a bifurcated support member 33B that rotatably supports the wheel 33A. The support member 33B houses the clutch 32. A casing 35 is attached to the casing 35 so as to be rotatable around a horizontal axis Z parallel to the horizontal width direction of the door 1. As shown in FIG. 14, the electric motor M protrudes greatly downward by arranging the electric motor M at a position substantially the same height as the door closer body 12 with the longitudinal direction of the electric motor M extending along the left-right width direction of the door 1. The installation space in the vertical direction can be kept small.

  By the way, when the electric motor M is configured to stop energization of the electric motor M by a signal from the rotary encoder 26 when the door 1 reaches a set angle, the door 1 is closed by the door closer 3. A mechanism for preventing rotation on the output shaft side on the motor side that is not energized by energy to the side is provided, and the mechanism is configured by a worm gear or the like provided on the electric motor M side. The door 1 can be kept in a state where the door 1 is opened at a predetermined angle. A brake motor may be used instead of the worm gear or the like. Alternatively, although not shown, a one-way clutch in which an outer race is fixed to the housing may be assembled to the shaft of the electric motor M or the output shaft (the one-way clutch prevents reverse rotation to the side opposite to the drive side). So it has the same effect as a brake). The one-way clutch may be used as a bearing of the electric motor M or the output shaft.

It is a top view which shows the state which located the door in two open positions. The door opening / closing apparatus is shown, (a) is a plan view thereof, and (b) is a front view thereof. It is a side view of an electric motor. It is a top view of a pulley. It is the sectional view on the AA line in FIG. It is sectional drawing which shows the principal part of a pulley. The drive pulley is driven and rotated, (a) shows the state immediately before the drive rotation, (b) shows the pulley rotated by 50 degrees, and (c) shows the pulley rotated 120 degrees. Shows the state. (A) is a plan view of the driven pulley with the rotational axis displaced, (b) is a graph showing the relationship between the rotational radius and the door opening angle, and a standard with the displaced pulley and the center of the circle as the rotational axis. Two of the pulleys are shown. It is a vertical perspective view of a string-like body. It is a top view which shows the state which rotated the drive side pulley by the predetermined angle, (a), (b) shows the state immediately before drive rotation, (c), (d) is the state which rotated and rotated the pulley 50 degree | times. Is shown. (A), (b), (c) is a top view which shows the state by which the drive side pulley is a stop state and the driven pulley is rotationally operated. It is the BB sectional view taken on the line in FIG. 12A and 12B show another embodiment, in which FIG. 12A shows a state where the limit switch is OFF, and FIG. 12B shows a state where the limit switch is ON. It is a perspective view of another door opening / closing apparatus.

Explanation of symbols

1 Door 2 Door frame (fixing member)
3 door closer 4 rotating shaft 5 driven pulley 5A flange 6 string 6A cover 6a fiber 6b aramid fiber 6B aramid fiber bundle 7 driving pulley 7A flange 8 bracket 9 link 10 swing arm 11 bolt 12 door closer body 13 casing 14 Motor body 15 Deceleration mechanism 16 Output shaft 17 Support member 18 Vertical plate 19 Locking member 20 Tension mechanism 21 Arm 22, 23 Roller 22A, 23A Locking groove 24 Support shaft 25 Coil spring 26 Rotary encoder 27 Slit plate 27T Projection piece 28 Support Member 29 Plate 29A Vertical plate part 30 Limit switch 30A Switch part 31 Contact member 32 Electromagnetic clutch 33 Pulley 33A Wheel 33B Support member 34 Output shaft 35 Casing K Cover M Electric motor (drive device)
V, W, X, Y, Z axis

Claims (9)

It is provided between a door that can swing open and close around the vertical axis and a fixing member that supports the door, and the energy stored when the door is opened due to the change from the open state to the closed state. A door closer for operating the door to the closed side by using, a driven pulley attached to the rotating shaft of the door closer interlocking with the opening / closing operation of the door, and one end wound around the driven pulley. And the other end of the string-like body is wound around, and a drive-side pulley that can be driven and rotated by a drive device. When the door is opened, the drive device is driven. By rotating the driving pulley, the string-like body wound around the driven pulley is pulled out and wound around the driving pulley, thereby rotating the rotating shaft to the door opening side .
The length of the string-like body wound around at least one of the driving side pulley and the driven side pulley is set to a length exceeding one turn of the pulley, and the width of the driving side pulley and the driven side pulley is set. A door opening and closing device characterized in that a plurality of the string-like bodies are set in a parallel state and cannot be wound up . A flange portion protruding in the radial direction of the pulley is provided on each outer peripheral edge on both sides in the rotational axis direction of each of the driving pulley and the driven pulley, and at least one of the two flange portions of each pulley is provided with the string. The door opening and closing device according to claim 1 , further comprising a through-hole set to a size capable of penetrating the shaped body. The door opening and closing device according to claim 1 or 2 , further comprising a tension mechanism between the driven pulley and the driving pulley for preventing the slack of the string-like body generated between the driven pulley and the driving pulley. Placing the drive pulley so that the driven pulley and the same height position at the top of the door, to any one of claims 1 to 3 comprising by arranging a drive device to a position directly below the drive pulley The door opening and closing device described. The drive-side pulley and the driven-side pulley are arranged so that their axes are parallel to each other, and the string-like body is wound around the pulley so that the pulleys rotate in reverse with each other. The door opening and closing device according to 3 . The tension mechanism is composed of an arm disposed between the pulleys and urged to rotate in one direction, and rollers attached to both ends of the arm, and a string-like body positioned between the two rollers. The door opening and closing device according to claim 3 or 5 , wherein at least one roller is pressed against the string-like body to prevent the string-like body from slackening. The rotation center of the driven pulley is set so that the outer peripheral edge where the rotational radius of the displaced driven pulley is maximized is not positioned on the wall surface side in the door opening / closing range . The door opening and closing device according to any one of 4 . The door opening and closing device according to any one of claims 1 to 7 , wherein the string-like body is made of a synthetic resin. The door opening and closing device according to any one of claims 1 to 8 , wherein the string-like body is a bundle of many high-strength fibers.

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