JP2009297267A - Hand drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hand drying device the long life of which can be attempted by controlling deterioration by reducing excessive load on a motor pivot and raising the durability of a nozzle movable means in the nozzle movable means using a mechanism in which rotational movement is converted into linear reciprocating motion. <P>SOLUTION: The hand drying device is obtained in which at least two or more bearings 24, which connect a crank pivot 15 and the motor pivot 13 in series and freely rotatably hold the crank pivot 15, are included and the long of which life can be attempted by controlling deterioration by excessive load on the motor pivot 13 and raising the durability of the nozzle movable means 9. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a hand dryer.

  An example of a conventional hand dryer using a movable nozzle is described in Patent Document 1, for example. FIG. 12 shows the configuration of a conventional hand dryer. According to this, the nozzle 101 that blows out the jet is moved in parallel with the direction in which the hand is inserted using the driving means 102, and when the hand is inserted, the jet coming out of the nozzle hits the wrist, At the same time, by moving the nozzle and applying a jet to the fingertip, water droplets attached to the hand can be dried in a short time.

Moreover, the example of the mechanism which converts the conventional rotary motion into a reciprocating motion is described in patent document 2, for example. FIG. 13 shows a conventional configuration. According to this, the motor 104 provided with the motor rotating shaft 103, the eccentric board 106 provided on the motor rotating shaft 103 and provided with the eccentric pin 105, the slide portion 107 configured to be reciprocated up and down, and the slide portion Since the connecting rod 108 that connects the 107 and the eccentric pin 105 is provided, the slide portion 107 reciprocates via the connecting rod 108 by the rotation of the motor 104.
Japanese Patent No. 3794333 JP-A-5-57671

  A problem with such a conventional hand dryer using a movable nozzle is to ensure the durability of the movable part and to improve the maintainability.

  In addition, in a mechanism that converts rotational motion into linear reciprocating motion, the inertial force generated by the reciprocating motion is transmitted to the motor rotation shaft and becomes a repeated load in the radial direction, which promotes deterioration of the motor and shortens its life. There is a problem of end.

  The present invention solves such a conventional problem, and in a nozzle movable means using a mechanism for converting a rotary motion into a linear reciprocating motion, deterioration is reduced by reducing an excessive load on the motor rotation shaft. An object of the present invention is to provide a hand drying device that can suppress, improve the durability of the nozzle moving means, and extend the life of the hand drying device.

  The hand drying device of the present invention is substantially perpendicular to the main body that forms the outline of the device, the hand drying chamber having a space in which a hand can be inserted, and the direction in which the hand is inserted into the wall surface of the hand drying chamber. A plurality of nozzles arranged in a direction and generating a jet for applying to the inserted hand, a blowing duct for guiding high-pressure air to the nozzle, and a high-pressure blower for blowing high-pressure air to the blowing duct, A motor having a motor rotation shaft as a nozzle moving means for reciprocally moving the nozzle, a crank rotation shaft rotating by the rotation of the motor, a crank having an eccentric pin on the opposite side of the motor, and a nozzle substantially perpendicularly A guide plate capable of reciprocating movement; a link connecting the guide plate and the eccentric pin; and a structure in which the guide plate reciprocates together with the nozzle when the motor rotates, Characterized in that the chromatography data rotating shaft bearing for rotatably holding and crankshaft rotational axis and connected in series with at least two or more. According to the present invention, in the nozzle movable means using the crank mechanism, the deterioration of the nozzle movable means is improved by suppressing the deterioration due to the excessive load on the motor rotation shaft, and the life of the hand dryer is extended. A hand-drying device is obtained.

  Further, the present invention is characterized in that shaft runout permitting means is provided which allows shaft runout between the motor rotary shaft and the crank rotary shaft to transmit rotation.

  Further, as shaft runout allowing means, rubber is interposed in a connecting portion between the motor rotating shaft and the crank rotating shaft.

  In addition, the motor holding portion is characterized by an elastic structure in which the motor is integrated with the housing portion that holds the outer ring of the bearing.

  In addition, a main body that forms the outline of the device, a hand drying chamber having a space for inserting a hand, and a plurality of devices arranged in a substantially perpendicular direction with respect to the direction in which the hand is inserted into the wall of the hand drying chamber are inserted and inserted. Motor rotation as a nozzle moving means that includes a nozzle that generates a jet to be applied to the hand, a blowing duct that guides the high pressure air to the nozzle and a high pressure blower that blows high pressure air to the blowing duct, and moves the nozzle back and forth. A motor having a shaft, a crank rotating shaft that rotates by rotation of the motor, a crank having an eccentric pin on the opposite side of the motor, a guide plate that can reciprocate substantially perpendicularly to the nozzle, and a guide plate and eccentricity A link for connecting the pins is provided, and the guide plate reciprocates together with the nozzles by rotating the motor. The guide plate is positioned at the opposite side of the eccentric pin about the crank rotation axis. Characterized by being installed Taweito.

  Further, the centrifugal force generated from the counterweight is characterized by being smaller than the maximum value of the inertial force generated by the reciprocating movement of the guide plate.

  Further, the centrifugal force generated by the counterweight is made smaller than the sum of the maximum value of the inertial force generated when the guide plate reciprocates and the maximum value of the inertial force due to the reciprocating movement of the nozzle. And

  In addition, the guide plate is formed in a plate shape having a plurality of guide plate support surfaces, the guide plate support surfaces are provided on both surfaces at symmetrical positions, and a plurality of rollers are installed so as to be tangent to the guide plate support surface. It is a configuration that enables reciprocal movement of the plate, and the roller that is tangent to at least one of the guide plate support surfaces is configured to apply pressure in a direction perpendicular to the reciprocating direction of the guide plate. To do.

  The roller also includes a roller rotation shaft, and the roller support member that supports the roller includes a support hole portion that supports the roller rotation shaft, a support shaft that is parallel to the roller rotation shaft, and a support shaft that is based on the support hole portion. A coil spring is provided at a symmetrical position, and a force in the rotational direction is generated around the support shaft by the expansion and contraction force of the coil spring to press the roller against the guide plate support surface.

  Further, the present invention is characterized in that there is provided an inter-support surface distance expanding means for generating a force in a direction in which the distance between the support surfaces of the guide plate support surfaces disposed on both sides of the guide plate is symmetrical.

  In addition, when an abnormality is detected by the abnormality detecting means, the abnormality detecting means for detecting an abnormality occurring in the nozzle moving means and a control means for receiving the detection signal from the abnormality detecting means and controlling the rotation and stop of the motor are provided. The rotation of the motor is stopped.

  In addition, a vibration detecting means capable of detecting the vibration of the nozzle moving means is provided as an abnormality detecting means, and when the vibration value detected by the vibration detecting means exceeds a preset value, the rotation of the motor is stopped by the control means. It is characterized by.

  In addition, a current value detection means for measuring the current value input to the motor is provided as an abnormality detection means, and the current value detected by the current detection means is more than twice the current value generated when operating normally. In this case, the motor is stopped by the control means.

  In addition, the main body is provided with a display unit for displaying an abnormality on the outside, and when the rotation of the motor stops due to the occurrence of the abnormality, the display unit displays the abnormality.

  In addition, when the abnormality is not detected by the abnormality detection means when the power supplied to the motor is shut off and then turned on again after the rotation of the motor stops, the rotation of the motor is restored by the control means. .

  Further, the present invention is characterized in that a frame for supporting the nozzle moving means is provided, and the nozzle moving means and the blowing duct can be separated by making the frame detachable from the blowing duct.

  Further, the present invention is characterized in that a housing unit in which a motor, a crank, a bearing, a housing part, and a motor holding part are assembled is configured so that the housing unit can be detachably fixed to a mount.

  According to the present invention, in the hand dryer provided with the nozzle moving means for moving the nozzle by the mechanism for converting the rotational movement into the linear reciprocating movement, an excessive load is not applied to the motor rotation shaft of the motor provided in the nozzle moving means. It is possible to provide a hand drying device that can improve the durability by suppressing the deterioration of the motor, improve the durability of the nozzle moving means, and extend the life of the hand drying device.

  The invention according to claim 1 of the present invention includes a main body that forms an outline of the apparatus, a hand drying chamber having a space in which a hand can be inserted, and a plurality of substantially perpendicular directions with respect to a direction in which a hand is inserted into the wall of the hand drying chamber A nozzle that is arranged and generates a jet to be applied to the inserted hand, a blowing duct that guides the high-pressure air to the nozzle and a high-pressure blower that blows high-pressure air to the blowing duct, and the nozzle is reciprocated. A motor equipped with a motor rotating shaft as a moving nozzle moving means, a crank rotating shaft that rotates by the rotation of the motor, a crank equipped with an eccentric pin on the opposite side of the motor, and a reciprocating movable substantially perpendicular to the nozzle A guide plate and a link for connecting the guide plate and the eccentric pin, and the guide plate reciprocates together with the nozzle when the motor rotates. At least two bearings connected to the row and rotatably holding the crank rotation shaft are provided, and the inertial force generated by the reciprocating motion of the guide plate is the reaction force of the plurality of bearings provided on the crank rotation shaft. Since it is supported by force, it has an effect that it is possible to make it difficult to transmit a radial load repeatedly due to inertial force to the motor rotation shaft.

  According to a second aspect of the present invention, there is provided shaft runout permitting means for transmitting the rotation while allowing shaft runout between the motor rotating shaft and the crank rotating shaft, and is generated by reciprocating motion of the guide plate. Even when the crank rotation shaft is displaced in the radial direction due to inertial force, the shaft runout allowing means can suppress the generation of a load on the motor rotation shaft.

  The invention according to claim 3 of the present invention is such that rubber is interposed in the connecting portion between the motor rotating shaft and the crank rotating shaft as the shaft runout allowing means, and the motor rotating shaft and the crank rotating shaft are made flexible by the rubber. The rotational force can be transmitted while allowing the shaft runout.

  According to a fourth aspect of the present invention, the motor holding portion has an elastic structure in which the motor is integrated with the housing portion that holds the outer ring of the bearing, and the shaft rotation of the motor rotating shaft and the crank rotating shaft is prevented. Even if it occurs, the motor holding portion is elastically deformed, so that the rotational force can be transmitted while allowing shaft runout.

  The invention according to claim 5 of the present invention includes a main body that forms an outline of the apparatus, a hand drying chamber having a space for inserting a hand, and a direction substantially perpendicular to the direction in which the hand is inserted into the wall surface of the hand drying chamber. A plurality of nozzles that are arranged and generate a jet to be applied to the inserted hand; a blowing duct that guides the high-pressure air to the nozzle; and a high-pressure blower that blows high-pressure air to the blowing duct. A motor having a motor rotation shaft as a nozzle moving means for reciprocating movement, a crank rotation shaft rotating by the rotation of the motor, a crank having an eccentric pin on the opposite side of the motor, and reciprocating movement substantially perpendicular to the nozzle The guide plate is provided with a link connecting the guide plate and the eccentric pin, and the guide plate reciprocates together with the nozzle when the motor rotates. A counterweight is installed at a position on the opposite side of the center pin. By counteracting the inertial force generated by the reciprocating motion of the guide plate with the centrifugal force generated by the counterweight, the counterforce generated on the crank rotation shaft by the inertial force. The force can be reduced, and the load transmitted to the motor rotation shaft connected to the crank rotation shaft can be reduced.

  Further, the invention according to claim 6 of the present invention is such that the centrifugal force generated from the counterweight is smaller than the maximum value of the inertial force generated by the reciprocating movement of the guide plate. The inertial force that is generated fluctuates in the magnitude of the inertial force that is generated during one revolution of the crank, whereas the centrifugal force that is generated by the counterweight has a constant centrifugal force at any rotation angle. Therefore, if the centrifugal force is equal to or less than the inertial force, the inertial force can be canceled by the centrifugal force regardless of the rotation angle of the crank, and the reaction force generated on the crank rotation shaft by the inertial force can be reduced. The load transmitted to the motor rotation shaft connected to the crank rotation shaft can be reduced, and the load transmitted to the motor rotation shaft connected to the crank rotation shaft can be reduced. It has the effect that it is possible.

  In the invention according to claim 7 of the present invention, the centrifugal force generated by the counterweight is the maximum value of the inertial force generated when the guide plate reciprocates and the maximum value of the inertial force due to the reciprocating motion of the nozzle. Even if an inertial force due to the reciprocating movement of the nozzle is generated in the crank rotation shaft, the centrifugal force by the counterweight is made smaller than the sum of the inertial force of the guide plate and the nozzle. The inertia force can be canceled by the force, and the reaction force generated on the crank rotation shaft by the inertia force can be reduced to reduce the load transmitted to the motor rotation shaft.

  In the invention according to claim 8 of the present invention, the guide plate is formed in a plate shape having a plurality of guide plate support surfaces, the guide plate support surfaces are provided on both sides in a symmetrical position, and are tangent to the guide plate support surface. In this way, the guide plate can be reciprocally moved by installing a plurality of rollers, and the roller tangent to at least one of the guide plate support surfaces is perpendicular to the reciprocating direction of the guide plate. It is configured to apply pressure, and when the guide plate reciprocates, vibration due to rattling in a direction perpendicular to the reciprocation direction does not occur, and the guide plate can be smoothly reciprocated. Therefore, the load on the motor rotation shaft due to the occurrence of vibration can be reduced.

  According to a ninth aspect of the present invention, the roller includes a roller rotation shaft, and the roller support member that supports the roller includes a support hole that supports the roller rotation shaft, and a support shaft that is parallel to the roller rotation shaft. A coil spring is provided at the symmetrical position of the support shaft with the support hole as a base point, and a force in the rotational direction is generated around the support shaft by the expansion and contraction force of the coil spring to press the roller against the guide plate support surface. Since a constant pressure can be applied in a direction perpendicular to the reciprocating direction of the guide plate by the coil spring, vibration due to rattling is not generated, and the guide plate can be smoothly reciprocated. Has the effect of being able to.

  The invention according to claim 10 of the present invention further includes a support surface distance expanding means for generating a force in a direction to increase the distance between the support surfaces of the guide plate support surfaces arranged on both sides at the symmetrical position of the guide plate. The distance between the support surfaces can be increased by applying pressure to the roller in a direction perpendicular to the reciprocating direction, and the guide plate can be smoothly reciprocated without vibration due to rattling. Therefore, it is possible to reduce the load on the motor rotation shaft due to the occurrence of vibration.

  The invention according to claim 11 of the present invention comprises an abnormality detecting means for detecting an abnormality occurring in the nozzle moving means, and a control means for receiving a detection signal from the abnormality detecting means and controlling the rotation and stop of the motor, When an abnormality is detected by the abnormality detection means, the rotation of the motor is stopped, and the nozzle moving means is not deteriorated by the abnormality.

  The invention according to claim 12 of the present invention comprises a vibration detection means capable of detecting the vibration of the nozzle moving means as the abnormality detection means, and when the vibration value detected by the vibration detection means is equal to or greater than a preset value, The control means stops the rotation of the motor, and has the effect that an excessive load is not generated on the nozzle moving means due to abnormal vibration.

  The invention according to claim 13 of the present invention includes current value detection means for measuring the current value input to the motor as abnormality detection means, and occurs when the current value detected by the current detection means operates normally. When the current value is twice or more than the current value, the rotation of the motor is stopped by the control means, so that an abnormal torque is not generated in the motor, and an excessive load is generated in the nozzle moving means. Has the effect of not.

  According to the fourteenth aspect of the present invention, the main body is provided with a display unit for displaying an abnormality to the outside, and when the rotation of the motor stops due to the occurrence of an abnormality, the display unit displays the abnormality. It has an effect that the necessity of maintenance can be recognized.

  According to the fifteenth aspect of the present invention, when the abnormality is not detected by the abnormality detection means when the power supplied to the motor is shut off and then turned on again after the rotation of the motor is stopped, the motor is controlled by the control means. Rotating the power supply again and confirming the operation and stop of the nozzle moving means, it is possible to determine that the motor has stopped due to a temporary abnormality or false detection. Have.

  According to a sixteenth aspect of the present invention, there is provided a frame for supporting the nozzle moving means, wherein the nozzle moving means and the blowing duct can be separated by making the frame detachable from the blowing duct. When the movable means is maintained, the maintenance work can be easily performed by easily separating the movable means from the duct.

  The invention according to claim 17 of the present invention comprises a housing unit in which a motor, a crank, a bearing, a housing part, and a motor holding part are assembled, and the housing unit can be detachably fixed to a gantry. When performing maintenance of the nozzle moving means, the housing unit can be detached from the gantry, so that the maintenance work can be easily performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 4. 1 is a cross-sectional perspective view showing the configuration of the hand dryer, FIG. 2 is a detailed cross-sectional view showing the configuration of the nozzle 3, FIG. 3 is a front view showing the configuration of the nozzle moving means 9, and FIG. The cross-sectional perspective view which shows is shown.

  The main body 1 fixed to the wall surface is provided with a hand drying chamber 2 as a space in which a user can insert a wet hand, and is formed of, for example, ABS or PP for applying a jet to the inserted hand. A plurality of cylindrical nozzles 3 are provided on the side surface of the hand drying chamber 2 in a state in which a plurality of cylindrical nozzles 3 are arranged in a direction substantially perpendicular to the hand insertion direction.

  In addition, the main body 1 includes a blower 4 as a high-speed turbo blower that generates high-pressure air, and a blowout duct 5 that guides an air flow blown from the blower 4 to the nozzle 3.

  On the other hand, the lower surface of the main body 1 is provided with a suction port 6 for taking in air from the outside, and a suction duct 7 for guiding air taken from the outside into the blower 4 from the suction port 6, so that the blower 4 can be connected from the suction port 6. Air can be blown to the nozzle 3 via the relay.

  Next, the reciprocally movable configuration of the nozzle 3 will be described.

  The nozzle 3 and the blowing duct 5 are connected by, for example, a silicon sheet material as the nozzle elastic holding member 8 so that the end of the nozzle 3 becomes a free end, and the nozzle 3 is externally guided while guiding air without leakage. It can be tilted by the force from. In the vicinity of the nozzle 3, for example, a plate-shaped guide plate 10 is supported by a plurality of rollers 11 so as to be linearly movable as nozzle moving means 9 that reciprocally moves the nozzle 3, and a plurality of opening holes 12 provided in the guide plate 10. When the guide plate 10 reciprocates, the opening hole 12 and the nozzle 3 interfere with each other, and the nozzle 3 is configured to repeatedly tilt in the reciprocating direction of the guide plate 10. On the other hand, the nozzle moving means 9 has a motor 14 having a motor rotation shaft 13 (DC motor as an example) and a crank rotation shaft 15 connected in series to the motor rotation shaft 13, and is opposite to the motor 14. A crank 16 having an eccentric pin 17 at an eccentric position parallel to the crank rotation shaft 15 on the side, and one end of the eccentric pin 17 and the link 18 are rotatably connected, and the other end of the link 18 and the guide plate 10 are provided. By being connected to the link connecting shaft 19, it is a mechanism for converting the rotational motion of the motor 14 into the reciprocating motion of the guide plate 10.

  Further, a control means 20 (a circuit board on which a microcomputer is mounted as an example) for controlling the operation of the motor 14 of the blower 4 and the nozzle moving means 9 is installed in the main body 1, and a hand is inserted into the hand drying chamber 2. A hand detecting means 21 (infrared sensor as an example) is installed to detect that this is done and send a detection signal to the control means 20.

  Further, in order to collect water droplets separated from the hand inserted in the hand drying chamber 2, a drain pipe 22 is connected from a hole opened in the bottom surface of the hand drying chamber 2, and a water receiver 23 installed on the lower surface of the main body 1. The water is guided up to.

  With these configurations, a series of situations of manual drying will be described.

  When the user inserts a hand into the hand drying chamber 2, the hand detection means 21 detects the hand and sends a detection signal to the control means 20, and the control means 20 operates the motor 14 of the blower 4 and the nozzle moving means 9. Let Outside air is taken in from the suction port 6 by the air flow generated by the blower 4, air is supplied to the blower 4 via the suction duct 7, and the air that has been pressurized by the blower 4 and becomes high pressure is discharged from the blowout duct 5. It is guided by the nozzle 3 and sprayed into the hand drying chamber 2. In addition, the nozzle 14 is reciprocally moved by the rotation of the motor 14 of the nozzle moving means 9, and the jet flow ejected from the nozzle 3 is reciprocated, thereby eliminating unevenness in drying by uniformly hitting the hand. And it has a high quick-drying property. The water droplet separated from the hand adheres to the wall surface of the hand drying chamber 2 and travels downward by gravity, and then is collected in the water receiver 23 through the drain pipe 22 from the hole on the bottom surface of the hand drying chamber 2.

  In the above configuration, when the nozzle moving means 9 is operated, the acceleration of the guide plate 10 is changed by the reciprocating motion of the guide plate 10, so that an inertial force Fa is applied to resist it. This inertial force Fa is expressed by the product of the weight ma of the guide plate 10 and the acceleration a. The maximum acceleration occurs at the moment (dead center) when the guide plate 10 changes the moving direction, and the inertial force Fa also becomes maximum. These inertial forces Fa are transmitted to the eccentric pin 17 via the link 18 and are generated as repeated radial loads in the radial direction with respect to the crank rotation shaft 15. This radial load is applied to the crank rotation shaft 15. Since the load is applied to the motor rotating shaft 13 by being transmitted to the connected motor rotating shaft 13, abnormal rotation of the motor 14 is generated and the deterioration of the motor 14 is promoted. Will be reduced.

  In order to avoid this, in the first embodiment of the present invention, by providing two bearings 24 (for example, deep groove ball bearings) for supporting the crank rotation shaft 15, a radial load applied to the crank rotation shaft 15 is applied to the bearing 24. This makes it possible to improve the durability of the motor 14 and extend the life of the hand dryer by making it difficult to transmit the radial load to the motor rotating shaft 13. At this time, if the bearing 24 is supported by a single piece, a bending moment is generated with the bearing 24 as a fulcrum due to the inertial force Fa acting on the eccentric pin 17, and an axial runout of the crank rotation shaft 15 occurs with the bearing 24 as a fulcrum. In order to accelerate the deterioration of the motor 14, shaft runout is transmitted to the motor rotating shaft 13 connected to the crank rotating shaft 15 so that deterioration of the motor 14 is accelerated. It is necessary to reduce shaft runout. Further, it is desirable to select and use a size of the bearing 24 that can sufficiently support a radial load.

  Further, as a means for reducing the load on the motor rotating shaft 13, there is a method of installing a shaft runout permitting means 25. The shaft runout accepting means 25 allows the shaft runout of the crank rotation shaft 15 to rotate to the motor rotary shaft 13. By transmitting this, it becomes difficult for the shaft runout to be transmitted to the motor rotating shaft 13, and the load on the motor rotating shaft 13 can be reduced.

  FIG. 5 shows an example of the shaft runout permission means 25. A hole 26 is provided in the same axial direction from the shaft end of the crank rotation shaft 15, and a cylindrical rubber 27 (urethane rubber as an example) is inserted into the hole 26, and the motor rotation shaft 13 is formed of the rubber 27. The rubber 27 is interposed between the crank rotation shaft 15 and the motor rotation shaft 13 by being inserted into the center hole 28. As a result, even if the crank rotation shaft 15 and the motor rotation shaft 13 cause, for example, radial shaft runout or shaft runout to be in a twisted position, the rubber 27 is deformed by the elasticity of the rubber 27 to cause shaft runout. Since the rotation can be transmitted while reducing the load applied to the motor rotating shaft 13, the durability of the nozzle moving means 9 can be improved and the life of the hand dryer can be extended.

  FIG. 6 shows another example of the shaft runout permission means 25. A cylindrical housing portion 29 that holds the outer ring of the bearing 24 and the motor 14 are integrated by a motor holding portion 30. The motor holding part 30 is formed of an elastic body (chloropyrene rubber as an example), and has an elastic structure by being fixed to the motor 14 by screws and further to the housing part 29. With this configuration, when the crank rotation shaft 15 and the motor rotation shaft 13 that are coaxial with the housing portion 29 are connected and shaft runout occurs in the crank rotation shaft 15, even if the shaft runout is transmitted to the motor rotation shaft 13, the motor The holding portion 30 is elastically deformed, so that the load on the motor rotation shaft 13 due to shaft runout can be reduced, while maintaining the same axis as the crank rotation shaft 15 and transmitting the rotation.

  Also, as shown in the front view of the crank 16 shown in FIG. 7, a fan-shaped counterweight 31 is installed at a position opposite to the eccentric pin 17 with the crank rotation shaft 15 as the center. Since Fr is generated to cancel the inertial force Fa and the radial load generated on the crank rotation shaft 15 can be reduced, the same effect is obtained.

  Hereinafter, the relationship between the centrifugal force Fr of the counterweight 31 and the inertial force Fa will be described.

  In FIG. 8A, the origin of the XY coordinate system is the crank rotation axis 15, the reciprocating direction of the guide plate 10 is the X axis, and the direction perpendicular to the reciprocating direction of the guide plate 10 is the Y axis. A locus of the magnitude of the inertial force acting around is shown as a load curve by a solid line in FIG. The load acting on the crank rotation shaft 15 includes an inertial force Fa and a centrifugal force Fp based on the centrifugal motion of the eccentric pin 17 and the link 18. The position where the inertial force Fa coincides with the X axis becomes a dead point where the moving direction of the guide plate 10 is changed and becomes a maximum value, while the centrifugal force Fp is always constant regardless of the rotation angle of the crank rotation shaft 15. Since force acts in the centrifugal direction, when these loads are combined, the locus becomes an elliptical load curve that is long in the X-axis direction and short in the Y-axis direction. Therefore, since the maximum value extending in the X-axis direction of the load curve is the maximum load acting on the crank rotation shaft 15, it is necessary to reduce this maximum load.

  Therefore, the counterweight 31 is installed in the direction opposite to the eccentric pin 17 of the crank 16 to generate the centrifugal force Fr in the direction opposite to the direction in which the inertial force Fa and the centrifugal force Fp work, and canceling these loads, The maximum load acting on the rotating shaft 15 can be reduced. However, while the direction in which the maximum load is generated is the X-axis direction, the centrifugal force Fr is generated not only in the X-axis direction but also in the Y-axis direction. Therefore, the centrifugal force Fr applied in the Y-axis direction becomes the centrifugal force Fp. If exceeded, the centrifugal force Fr becomes a force more than canceling out the centrifugal force Fp, and a load in the opposite direction is generated.

  Therefore, as an example, an index for setting the centrifugal force Fr by the counterweight 31 is set to be equal to or less than the inertial force Fa, which has an effect of reducing the maximum value of the inertial force Fa acting in the X-axis direction. At that time, the load in the Y-axis direction exceeds the centrifugal force Fp and a load in the opposite direction is generated by the centrifugal force Fr. However, since the load is equal to or less than the maximum value of the inertial force Fa, the counterweight 31 is compared with that before installation. There is an effect of reducing the maximum load acting on the crank rotation shaft 15. Desirably, the centrifugal force Fr is set to ½ of the inertial force Fa, and is indicated by a broken line in FIG. When the resultant force of the centrifugal force Fr by the load curve shown by the solid line in FIG. 8 (a) and the counterweight 31 shown by the broken line is shown in FIG. 8 (b), the load curve becomes almost circular and in the X-axis direction. The acting inertia force Fa is ½, and the load acting in the opposite direction more than canceling the centrifugal force Fp in the Y-axis direction is also ½ or less of the inertia force Fa, so the load acting on the crank rotation shaft 15. The effect of reducing the maximum value is high, the load transmitted to the motor rotating shaft 13 can be reduced, the durability of the nozzle moving means 9 can be improved, and the life of the hand dryer can be extended.

  Furthermore, when the weight of the nozzle 3 is sufficiently small, for example, to be 5% or less with respect to the weight of the guide plate 10, the centrifugal force Fr may be set as described above. If the inertial force Fb due to the reciprocating motion of the nozzle 3 cannot be ignored, the inertial force applied in the X-axis direction of the crank rotation shaft 15 must be considered as the resultant force of the inertial forces Fa and Fb. The centrifugal force Fr generated by 31 should also be set to be equal to or less than the resultant force of the inertial forces Fa and Fb. Desirably, the centrifugal force Fr is ½ of the resultant force of the inertial forces Fa and Fb, the resultant force of the inertial forces Fa and Fb acting in the X-axis direction is ½, and a load curve in the Y-axis direction. Since the load acting in the opposite direction more than canceling the load is also ½ or less of the resultant force of the inertial forces Fa and Fb, the effect of reducing the maximum value of the load acting on the crank rotation shaft 15 is high. effective.

  Further, as one of the factors that deteriorate the durability of the nozzle moving means 9, there is rattling when the guide plate 10 reciprocates, and the guide plate 10 vibrates due to rattling, and this vibration causes the crank rotation shaft to vibrate. 15 shaft vibrations are generated and transmitted to the motor rotation shaft 13 to become a load, and the durability of the nozzle moving means 9 is deteriorated.

  In order to avoid this, as an example of a method for suppressing the rattling of the guide plate 10, as shown in FIG. 3, the guide plate support surface 32 is provided in a symmetrical and parallel position on both side surfaces of the guide plate 10. By arranging the four rollers 11 so as to face each other so as to be tangent to the support surface 32, the guide plate 10 is supported so as to be able to reciprocate. As shown in FIG. 2, the guide plate support surface 32 has a convex cross section, and the roller 11 tangent to the guide plate support surface 32 has a concave cross section so that the guide plate 10 reciprocates. Movements other than the direction of movement are restricted. As shown in FIG. 9, the roller 11 tangent to one of the guide plate support surfaces 32 has a roller rotation shaft 33, and a support hole 34 that supports the roller rotation shaft 33 and the roller rotation shaft 33. It is held by a roller support member 36 having a support shaft 35. The roller 11 holding member is provided with a coil spring 37 that generates tension in a direction in which the roller 11 is pressed against the guide plate support surface 32 with the support shaft 35 as the center of rotation. Therefore, even if the guide plate 10 reciprocates, rattling does not occur, and vibration due to rattling can be reduced. Therefore, the shaft runout of the crank rotation shaft 15 due to vibration can be reduced, and the load transmitted to the motor rotation shaft 13 is reduced. Therefore, the durability of the nozzle moving means 9 is improved and the life of the hand dryer is extended. Can do.

  As another example, a detailed perspective view showing the configuration of the guide plate 10 is shown in FIG.

  A plate spring as a support surface distance increasing means 38 for increasing the distance between the support surfaces of the guide plate support surface 32 is installed between the support surfaces, and the plate spring is compressed by the roller 11 fixed in contact with the guide plate support surface 32. Then, by being supported in a state where the distance between the support surfaces is reduced, a force is generated in a direction in which the guide plate support surface 32 is always expanded by the restoring force of the leaf spring, and pressure is applied to the roller 11. Thereby, even if the guide plate 10 reciprocates, rattling does not occur, vibration due to rattling can be reduced, and the same effect is obtained.

  Further, as shown in FIG. 3, as an example of an abnormality detecting means for detecting an abnormality occurring in the nozzle moving means 9, a vibration detecting means 39 is provided in the vicinity of the nozzle 3 moving device, and vibrations generated while the nozzle 3 is moving can be detected. When the vibration value detected by the vibration detection means 39 exceeds a preset value (for example, twice the vibration value generated when operating normally), a detection signal is sent to the control means 20, By stopping the rotation of the motor 14 by the control means 20, it is possible to eliminate problems caused by moving in the abnormal state, improve the durability of the nozzle moving means 9, and extend the life of the hand dryer.

  Further, as another abnormality detection means, as shown in FIG. 3, the current detection means 40 for detecting the current value input to the motor 14 of the nozzle moving means 9 is provided, and the current value input to the motor 14 is normal. Since the rotational torque generated in the motor 14 increases and the load on the motor 14 increases, the rotation of the motor 14 is stopped in a similar manner. effective.

  Further, in order to notify the outside that the rotation of the motor 14 has stopped due to these abnormality detections, maintenance is required by installing a display unit 41 (an LED lamp as an example) on the main body 1 as shown in FIG. By recognizing that there is, maintenance and inspection of the nozzle moving means 9 can improve the durability of the nozzle moving means 9 and extend the life of the hand dryer.

  In addition, after the rotation of the motor 14 is stopped due to an abnormality, when the abnormality detection unit does not detect the abnormality when the power to the motor 14 is turned on again, the rotation of the motor 14 is restored by the control unit 20. Therefore, a case where the nozzle is stopped due to a sudden event (for example, detection of vibration abnormality due to a collision between the main body 1 and an external object) and no abnormality occurs in the nozzle moving means 9 is excluded. As a result, the hand dryer can be used as long as no abnormality occurs, and the life of the hand dryer can be extended.

  Further, as shown in FIG. 11, a base 42 for supporting the nozzle movable means 9 is provided, and the base 42 is screwed to the blowing duct 5 so as to be detachable. Maintenance work can be easily performed by easily separating from the blowout duct 5, and the durability of the nozzle moving means 9 can be improved by periodically maintaining the nozzle moving means 9, thereby extending the life of the hand dryer. Can do.

  Further, the housing unit 43 is assembled by assembling the motor 14, the crank 16, the bearing 24, the housing part 29, and the motor holding part 30, and the housing unit 43 and the mount 42 are configured to be detachable by screwing, When performing maintenance of the nozzle moving means 9, it becomes easier to perform maintenance work by separating the housing unit 43, and the same effect can be further enhanced by periodically maintaining the nozzle moving means 9.

  The present invention can also be applied to applications such as a drying device that blows off water droplets using a jet and dries, and an air blow device that blows off dust and the like.

Sectional perspective view which shows the structure of the hand-drying apparatus of Embodiment 1 of this invention. Detailed sectional view showing the configuration of the nozzle Front view showing the configuration of the nozzle moving means Cross-sectional perspective view showing the configuration of the nozzle moving means Detailed cross-sectional view showing an example of coaxial run-out permitting means Detailed sectional view showing another example of coaxial deflection allowing means Front view showing the crank and counterweight (A) XY coordinate graph showing the load curve acting on the crank rotation shaft (b) XY coordinate graph showing the resultant force of the inertial force and centrifugal force acting on the crank rotation shaft Detailed sectional view showing the configuration of the roller support member Detailed perspective view showing the configuration of the guide plate Detailed perspective view showing attachment / detachment state of the nozzle moving means Detailed perspective view showing the configuration of a conventional hand dryer Sectional view showing the configuration of a conventional reciprocating mechanism

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Hand drying chamber 3 Nozzle 4 Blower 5 Outlet duct 9 Nozzle movable means 10 Guide plate 11 Roller 13 Motor rotating shaft 14 Motor 15 Crank rotating shaft 16 Crank 17 Eccentric pin 18 Link 20 Control means 24 Bearing 25 Shaft allowance means 27 Rubber 29 Housing portion 30 Motor holding portion 31 Counter weight 32 Guide plate support surface 33 Roller rotation shaft 34 Support hole portion 35 Support shaft 36 Roller support member 37 Coil spring 38 Distance between support surface expansion means 39 Vibration detection means 40 Current detection means 41 Display Unit 42 Base 43 Housing Unit

Claims (17)

A main body that forms an outer shell of the apparatus, a hand drying chamber having a space in which a hand can be inserted, and a plurality of hands inserted in a substantially perpendicular direction with respect to a direction in which the hand is inserted into the wall surface of the hand drying chamber. A nozzle that generates a jet to be applied to the nozzle, a blowing duct that guides the nozzle to the nozzle with high-pressure air, and a high-pressure blower that blows high-pressure air to the blowing duct, as nozzle moving means that reciprocally moves the nozzle A motor having a motor rotation shaft, a crank rotation shaft rotating by the rotation of the motor, a crank having an eccentric pin on the opposite side of the motor, and a guide plate reciprocally movable substantially perpendicular to the nozzle And a link that connects the guide plate and the eccentric pin, and the guide plate reciprocates together with the nozzle when the motor rotates. Click rotary shaft and the motor rotary shaft hand dryer having at least two bearings for rotatably holding and coupled in series the crankshaft rotation axis. 2. The hand dryer according to claim 1, further comprising a shaft misalignment allowing means for transmitting rotation while allowing a shaft misalignment between the motor rotating shaft and the crank rotating shaft. The hand-drying device according to claim 1 or 2, wherein rubber is interposed in a connecting portion between the motor rotation shaft and the crank rotation shaft as the shaft deviation allowance means. The hand dryer according to any one of claims 1 and 2, wherein the motor holding portion has an elastic structure in which the housing portion holding the outer ring of the bearing and the motor are integrated. A main body that forms an outer shell of the apparatus, a hand drying chamber having a space in which a hand can be inserted, and a plurality of hands inserted in a substantially perpendicular direction with respect to a direction in which the hand is inserted into the wall surface of the hand drying chamber. A nozzle that generates a jet to be applied to the nozzle, a blowing duct that guides the nozzle to the nozzle with high-pressure air, and a high-pressure blower that blows high-pressure air to the blowing duct, and nozzle moving means that reciprocally moves the nozzle A motor having a motor rotation shaft, a crank rotation shaft rotating by the rotation of the motor, a crank having an eccentric pin on the opposite side of the motor, and a guide plate reciprocally movable substantially perpendicular to the nozzle And a link that connects the guide plate and the eccentric pin, and the guide plate reciprocates together with the nozzle when the motor rotates. Click rotary shaft the eccentric pin hand dryer in which the counterweight is placed at a position on the opposite side of the center of. 6. The hand dryer according to claim 5, wherein the centrifugal force generated from the counterweight is smaller than the maximum value of the inertial force generated by the reciprocating movement of the guide plate. The centrifugal force generated by the counterweight is smaller than the sum of the maximum value of the inertial force generated when the guide plate reciprocates and the maximum value of the inertial force due to the reciprocating movement of the nozzle. Item 7. The hand drying apparatus according to any one of Items 6. The guide plate is formed in a plate shape having a plurality of guide plate support surfaces, the guide plate support surfaces are provided on both sides at symmetrical positions, and a plurality of rollers are installed so as to be tangent to the guide plate support surface. A configuration in which the guide plate is reciprocally movable, and a roller that is tangent to at least one of the guide plate support surfaces is configured to apply pressure in a direction perpendicular to the reciprocating direction of the guide plate. The hand dryer according to any one of claims 1 to 7. The roller includes a roller rotation shaft, and the roller support member for supporting the roller includes a support hole portion for supporting the roller rotation shaft, a support shaft parallel to the roller rotation shaft, and the support hole portion as a base point. 9. The hand according to claim 8, wherein a coil spring is provided at a symmetrical position of the support shaft, and a force in a rotational direction is generated around the support shaft by the expansion and contraction force of the coil spring to press the roller against the guide plate support surface. Drying equipment. 9. The hand dryer according to claim 8, further comprising means for enlarging the distance between the support surfaces that generates a force in a direction in which the distance between the support surfaces of the guide plate support surfaces disposed on both sides of the guide plate is symmetrical. When an abnormality is detected by the abnormality detecting means, the abnormality detecting means for detecting an abnormality occurring in the nozzle moving means, and a control means for receiving a detection signal from the abnormality detecting means to control rotation and stop of the motor. The hand dryer according to claim 1, wherein the rotation of the motor is stopped. A vibration detecting means capable of detecting the vibration of the nozzle moving means as an abnormality detecting means is provided, and when the vibration value detected by the vibration detecting means exceeds a preset value, the control means stops the rotation of the motor. Item 11. The hand dryer according to Item 11. A current value detecting means for measuring a current value input to the motor is provided as an abnormality detecting means, and the current value detected by the current detecting means is more than twice the current value generated when operating normally. The hand dryer according to claim 11, wherein the rotation of the motor is stopped by the control means. The hand dryer according to any one of claims 11 to 13, wherein a display unit for displaying an abnormality is provided in the main body, and when the rotation of the motor is stopped due to an abnormality, the display unit displays the abnormality. 12. The motor rotation is restored by the control means when the abnormality detection means detects no abnormality when the power supplied to the motor is cut off and then turned on again after the motor rotation stops. 14. The hand dryer according to any one of 14 above. 16. The structure according to claim 1, further comprising a gantry that supports the nozzle movable means, wherein the nozzle movable means and the blowout duct can be separated by making the cradle detachable from the blowout duct. Hand dryer. The hand dryer according to claim 16, wherein a housing unit in which a motor, a crank, a bearing, a housing part, and a motor holding part are assembled is configured, and the housing unit can be detachably fixed to a mount.

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