JP2007297781A - Equipment for stopping fall of shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide equipment for stopping the fall of a shutter, which can accurately brake the fall and obtain a stable braking force while hardly causing aged deterioration, when the shutter falls because a motor and a motor brake break down in case a trouble occurs. <P>SOLUTION: This equipment comprises: a speed-increasing gear 4 which is connected to a rotating shaft of a drum 102, so as to increase and output the rotational speed of the rotating shaft; a brake unit 5 which is frictionally engaged with the rotating shaft of the speed-increasing gear 4 so as to brake the rotation of the speed-increasing gear; a speed detector 5 for detecting the output speed of the speed-increasing gear 4; and a control unit 113 which detects the abnormal fall of the shutter on the basis of the output speed detected by the speed detector 5, so as to operate the brake unit 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shutter fall stop device in a shutter device in which a sheet-like shutter is wound around a drum and the drum is rotated to raise and lower the shutter.

  2. Description of the Related Art Conventionally, a shutter device that is provided at an entrance of a factory or a warehouse and opens and closes the entrance is known. Also, as a shutter device, there is a drum around which a sheet-like shutter is wound in order to open and close the entrance and exit, and the sheet-like shutter is sent to the entrance and exit by rotating the drum in both forward and reverse directions. It is known that the doorway is closed and the doorway is opened by winding a sheet-like shutter around a drum.

  The shutter device described above includes a drive motor for rotating the drum, a motor brake for braking the rotation of the drive motor, and a drive control device for controlling the drive of the drive motor and the motor brake. (For example, refer to Patent Document 1).

  In addition, in some cases, a lifting device for a driven body such as a shutter is provided with a governor brake that operates in conjunction with the fall of the driven body and brakes the fall of the driven body in case of failure. (For example, refer to Patent Document 2).

The governor brake generally includes a rotating shaft that rotates as the driven body drops, and a brake shoe that protrudes outward under the centrifugal force generated by the rotation of the rotating shaft. It is configured to frictionally engage the contact portion (brake surface) to suppress the rotation of the drive motor and to brake the fall of the driven body.
JP-A-2005-240416 Japanese Patent Laid-Open No. H07-102805

  However, a shutter device equipped with a governor brake wears and changes with time in the friction engagement portion of the governor brake, so that it is complicated to maintain a predetermined brake repeatedly and increases costs. There was a risk of impairing productivity. Further, since the governor brake is actuated through centrifugal force, it is difficult to actuate the brake with high accuracy corresponding to the rotational speed of the drum.

  Accordingly, the present invention provides a shutter that can accurately brake the fall when the drive motor and the motor brake break down due to a trouble, and can obtain a stable braking force with little change over time. An object is to provide a fall stop device.

  In order to achieve this object, the invention according to claim 1 is a shutter fall stop device, which is connected to a rotating shaft of a drum that winds up a sheet-like shutter, and increases the rotating speed of the rotating shaft. Output speed increaser, a brake unit that frictionally engages the rotation shaft of the speed increaser to brake the rotation of the speed increaser, a speed detector that detects an output speed of the speed increaser, and the speed detector And a control device for detecting an abnormal drop of the shutter and operating the brake unit based on the output speed detected in step (b).

  According to the shutter stop device of the first aspect, the speed increasing device that increases the rotational speed of the rotating shaft of the drum and outputs the speed increasing device, and the frictional engagement with the rotating shaft of the speed increasing device to rotate the speed increasing device. A brake unit for braking the speed increaser, a speed detector for detecting the output speed of the speed increaser, and detecting an abnormal drop of the shutter based on the output speed detected by the speed detector, and operating the brake unit Since the control device is provided, it is possible to brake the shutter with high accuracy according to the rotational speed of the drum and stop the falling of the shutter.

  In addition, according to the shutter fall stop device of the first aspect, since the rotational torque of the drum is reduced through the speed increaser, braking by the brake unit can be surely exhibited. In addition, the speed at which the brake is operated by the brake unit can be set in advance every time the shutter is raised and lowered, and the brake operation and the shutter stoppage can be further accurately obtained.

  Next, according to a second aspect of the present invention, there is provided the shutter drop stop device according to the first aspect, wherein a driving motor for rotating the drum is driven at one end of the rotating shaft of the drum, and a rotational speed of the driving motor. And a motor brake connected to the rotation shaft of the drive motor and braking the rotation of the drive motor. The speed increase is provided at the other end of the rotation shaft of the drum. The speed detector, the speed detector, and the brake unit are integrally connected.

  According to the shutter stop device of claim 2, at one end of the rotating shaft of the drum, a driving motor that rotationally drives the drum, a speed reducer that reduces the rotational speed of the driving motor and increases the rotational torque, A motor brake that is connected to the rotation shaft of the drive motor and brakes the rotation of the drive motor. A speed increaser, a speed detector, and a brake unit are integrally connected to the other end of the rotation shaft of the drum. Therefore, when rotating the drum, the rotational driving force of the motor can be decelerated via the speed reducer and the rotational torque can be increased to rotate the drum, and when stopping the fall of the shutter, the speed increaser The above-described increased rotational torque can be reduced through the rotation of the drum, so that the rotation of the drum can be reliably stopped.

  According to the shutter fall stop device of the second aspect, the drive motor and the speed reducer are disposed at one end of the rotating shaft of the drum, and the speed increaser, the brake unit, and the speed are disposed at the other end of the rotating shaft of the drum. Since the fall stop device such as the detector is provided, the balance is better than that provided only in one of the axial directions, and the brake by the brake unit can be operated effectively.

  In addition, the shutter fall stop device according to claim 1 or 2, as in the invention according to claim 3, is configured such that the speed increaser is connected to the output shaft and rotates together with the output shaft. An internal gear coaxially disposed on the gear and the sun gear via a gap, a planetary gear disposed in the gap and meshing with the sun gear and the internal gear, and the planetary gear rotatably supported And a carrier rotatably supported coaxially with the sun gear, and the rotating shaft of the drum is connected to the carrier and is configured to rotate together with the carrier. The rotational speed of the rotating shaft of the drum can be reduced, the rotating torque can be reduced and transmitted to the output shaft, and the brake can be actuated on the output shaft so that the ratio of the number of gear teeth is achieved.

  The shutter fall stop device according to the present invention includes a speed increasing device that increases the rotational speed of the rotating shaft of the drum and outputs the same, and a brake unit that frictionally engages the rotating shaft of the speed increasing device and brakes the rotation of the speed increasing device. A speed detector for detecting the output speed of the speed increaser, and a control device for detecting an abnormal drop of the shutter and operating the brake unit based on the output speed detected by the speed detector; Therefore, it is possible to brake accurately and stop the shutter from falling according to the rotational speed of the drum.

  Also, the shutter fall stop device of the present invention can reduce the rotational torque of the drum through the speed increaser, so that the braking of the rotation by the brake unit can be surely expressed, and each time the shutter is raised and lowered, The speed at which the brake is operated can be set in advance, and the operation of the brake and the stop of the shutter falling can be obtained with higher accuracy.

  In addition, the shutter fall stop device of the present invention includes a drive motor that rotationally drives the drum at one end of the rotating shaft of the drum, a speed reducer that reduces the rotational speed of the drive motor and increases the rotational torque, A motor brake that is connected to the rotation shaft and brakes the rotation of the drive motor, and a speed increaser, a speed detector, and a brake unit are integrally connected to the other end of the rotation shaft of the drum. When rotating the drum, the rotational driving force of the motor can be decelerated through the speed reducer and the rotational torque can be increased to rotate the drum. Therefore, the rotation of the drum can be stopped reliably.

  In addition, the shutter fall stop device of the present invention has a drive motor and a speed reducer disposed at one end of a drum rotation shaft, and a speed increaser, a brake unit, a speed detector and the like are dropped at the other end of the drum rotation shaft. Since the stop device is provided, the balance is better than that provided only in one of the axial directions, and the brake by the brake unit can be operated effectively.

  Further, according to the shutter stop device of the present invention, as in the invention according to claim 3, the speed increaser is connected to the output shaft and rotates together with the output shaft, and the sun gear via a gap. An internal gear arranged coaxially, a planetary gear arranged in a gap and meshing with the sun gear and the internal gear, and the planetary gear rotatably supported and coaxially supported with the sun gear. And a drum rotating shaft connected to the carrier and configured to rotate together with the carrier, so that the drum rotates so that the ratio of the number of teeth of the sun gear and the internal gear is obtained. The rotational speed of the shaft can be reduced and transmitted to the output shaft to reduce the rotational torque, and the brake can be actuated on this output shaft.

  Next, a driving apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of a shutter device equipped with a shutter fall stop device according to an embodiment to which the present invention is applied, and FIG. 2 is a cross-sectional view showing the structure of the fall stop device in the embodiment. FIG. 3 and FIG. 3 are flowcharts showing the operation procedure of the fall stop device of the present embodiment.

  As shown in FIG. 1, the shutter device 101 is provided at the upper end of the opening of the entrance / exit, and rotates when the rotational driving force of the drive motor 106 is transmitted (rotates in the R direction in FIG. 1). 102, a sheet-like shutter 103 that is wound around the drum 102 and slides up and down along the opening as the drum 102 rotates, and a drive that controls the rotation of the drum 102 based on a command signal input from an operator In the event that the control device 104 and the drive control device 104 break down, a fall stop device 105 that operates in conjunction with the fall of the shutter 103 and brakes the fall of the shutter 103 is provided.

  In addition, the shutter device 101 has, on the one end side of the rotating shaft of the drum 102, a speed reducer 107 that reduces the rotating speed of the driving motor 106 and increases the rotating torque together with the driving motor 106, and the rotating shaft of the driving motor 106. A motor brake 108 that brakes the rotation of the drive motor 106 is connected to the motor 107b.

  The drive control device 104 includes a start switch 109, a speed setting unit 110 for setting the rotation speed of the drum 102, a lift switch 111 for switching the lift of the shutter 103, and a brake switch 112 for switching the operation and stop of the motor brake 108. Etc.

  The fall stop device 105 is connected to the rotating shaft of the drum 102, and the speed increasing device 4 that increases the rotational speed of the rotating shaft and outputs it, and frictionally engages the output shaft of the speed increasing device 4 and A brake unit 6 that brakes rotation, a speed detector 5 that detects the output speed of the speed increaser 4, and an abnormal drop of the shutter 102 is detected based on the output speed detected by the speed detector 5. 6 and a control device 113 for operating 6.

  The control device 113 includes a speed detection unit 114 that calculates a speed based on a pulse signal input via the speed detector 5, and the speed detected by the speed detection unit 114 exceeds a preset speed range. In this case, a notifying unit 115 for notifying abnormality and a brake driving circuit 116 for driving the brake unit 6 are provided.

  Next, as shown in FIG. 2, the fall stop device 105 is connected to the input shaft 2, and the speed increaser 4 that increases the rotational speed of the input shaft 2 and transmits it to the output shaft 3, and the output shaft 3 and a speed detector 5 that detects the rotational speed of the output shaft 3, and based on the rotational speed of the output shaft 3 detected through the speed detector 5, frictionally engages the output shaft 3 to brake the rotation of the output shaft 3. The input shaft 2 is integrally connected to the rotating shaft of the drum 102.

  The electromagnetic brake 6 includes a brake case 6a, a yoke (electromagnet) 6b fixed to the brake case 6a, an electromagnetic coil 6c housed in the yoke 6b, a disc brake 6d fixed to the output shaft 3, and a disc brake 6d. An armature (braking plate) 6e disposed between the yoke 6b and slidably supported in the axial direction, and a side plate 6f.

  In the electromagnetic brake 6, an armature 6 e is biased toward a disc brake 6 d by a coil spring (not shown) housed in a yoke 6 b, and the yoke 6 b and the side plate 6 f are applied to the brake case 6 a via bolts 7. The electromagnetic coil 6c is connected to the control device 113 through a cable 6g.

  When the armature 6e is frictionally engaged with the disc brake 6d by the biasing force of the coil spring to brake the rotation of the output shaft 3 and the electromagnetic coil 6c is energized via the control device 113, the electromagnetic brake 6 is A magnetic force is generated in the yoke 6b, and the yoke 6b attracts the armature 6e to separate it from the disc brake 6d, thereby releasing the braking of the rotation of the output shaft 3.

  Next, the speed detector 5 is an electrostatic capacity type encoder, which is fixed to the output shaft 3 and is opposed to the rotor 5a via a gap and a rotor 5a that rotates integrally with the output shaft 3. And a stator 5b fixed to the brake case 6a. The rotor 5a is provided with a plurality of first electrodes 5c with a predetermined gap along the circumferential direction. A second electrode 5d facing the electrode 5c with a predetermined gap is provided.

  Then, the speed detector 5 detects the static electricity between the first electrode 5c and the second electrode 5d when the first electrode 5c and the second electrode 5d face each other as the rotor 5a rotates. On the other hand, when the first electrode 5c and the second electrode 5d are not opposed to each other, the capacitance between the first electrode 5c and the second electrode 5d is minimized, and the stator 5b is configured to detect this change in capacitance, convert it into a pulse signal, and output it to a control device (not shown) via a cable 5e.

  In the speed detector 5, the first electrodes 5c are arranged in two rows in the radial direction of the rotor 5a, and the electrodes in the first row and the second row are each 1/4 in the circumferential direction. Capacitance that is shifted by the pitch and that develops between the second electrode and the first and second electrodes of the first electrode 5c as the rotor 5a rotates. Detecting and outputting the pulse train corresponding to the first electrode and the pulse train corresponding to the second electrode to the control device 113 described above.

  And the control apparatus 113 is comprised so that the rotation direction of the rotor 5a can be detected by comparing the 1st pulse train of the 1st electrode 5c with the 2nd pulse train.

  Next, the brake case 6 a is fixed to the intermediate case 8 via the bolt 13, and the intermediate case 8 is fixed to the speed increaser case 9 via the bolt 14. The output shaft 3 is rotatably supported by the intermediate case 8 via the bearing 10 and the bearing 11, and the tip of the speed increaser 4 is rotatably supported by the carrier 43 via the bearing 12. It is supported. A sealing member 17 is attached to the insertion portion of the output shaft 3 with respect to the intermediate case 8.

  Next, the speed increaser 4 includes a sun gear 40 that is connected to the output shaft 3 and rotates together with the output shaft 3, an internal gear 41 that is coaxially disposed in the sun gear 40 via a gap, and the gap A planetary gear 42 disposed and meshed with the sun gear 40 and the internal gear 41, a carrier 43 that rotatably supports the planetary gear 42 and is rotatably supported coaxially with the sun gear 40, and the center of the carrier 43 The second sun gear 44 fixed to the carrier 43 and rotated together with the carrier 43, the second internal gear 45 disposed coaxially with the second sun gear 44 via a gap, and the second sun gear disposed in the gap. 44 and a second planetary gear 46 that meshes with the second internal gear 45, and a second carrier 47 that rotatably supports the second planetary gear 46 and is rotatably supported coaxially with the second sun gear 44. The second carrier 47 is connected to the input shaft 2 It is rotated together with the input shaft 2, and is configured to transmit the rotation to the output shaft 3 at a reduced speed.

  The internal gear 41 is engaged with the intermediate case 8 via the positioning pins 48 and is fixed to the speed increasingr case 9.

  The carrier 43 is fixed by inserting a connection pin 49 and rotatably supports the planetary gear 42 via the connection pin 49. Further, the carrier 43 is rotatably supported by the speed increaser case 9 via a bearing 50. Between the planetary gear 42 and the intermediate case 8 in the axial direction, a slide plate 51 that is positioned in the axial direction and reduces the frictional force is mounted.

  One end of the second sun gear 44 is fixed to the carrier 43, and the other end is rotatably supported by the second carrier 47 via the bearing 20.

  The second internal gear 45 is positioned on the speed increaser case 9 via the positioning pins 52, and its outer peripheral portion is fixed to the speed increaser case 9.

  The second carrier 47 is fixed with the second connecting pin 53 inserted therethrough, and supports the second planetary gear 44 via the second connecting pin 53 in a rotatable manner. The second carrier 47 is rotatably supported by the speed increaser case 9 via a bearing 54.

  Next, a cover 55 is fixed to the end of the speed increasing gear case 9 on the input shaft 2 side via a bolt 56, and a sealing member 57 is attached to the outer periphery of the input shaft 2 and the inner periphery of the cover 55. ing. In addition, a slide plate 58 is mounted between the carrier 43 and the second carrier 47 to position each other in the axial direction and suppress the generation of frictional force.

  Next, the operation procedure of the fall stop device of the present embodiment will be described with reference to FIG. The control device 113 in the fall stop device includes a CPU, a ROM, a RAM, and the like, and the CPU cooperates with the ROM and the RAM to execute the following processing procedure.

  First, this procedure starts when the operator operates the start switch 109 via the drive control device 104 and the start signal is input to the control device 113. Simultaneously with the start, the previous speed data stored in the ROM, RAM or the like is initialized.

  Next, in S101 (S represents a step), the speed set value set via the speed setting unit 110 is acquired, and the process proceeds to S102. In S102, the up / down direction set via the up / down changeover switch 111 is obtained. The process proceeds to S103, where the brake unit 5 is released (that is, the braking of the brake in the brake unit 6 is released).

  Next, in S104, the rotational speed of the output shaft 3 of the speed increaser 5 is detected via the speed detector 114, and the process proceeds to S105.

  Next, in S105, it is determined whether or not the detected rotation speed is within a predetermined value range. The predetermined value is stored in advance in the ROM of the control device 113 for each speed setting value set via the speed setting unit 110 and each raising / lowering direction set via the up / down changeover switch 111, and the CPU sets the predetermined value. Obtain and determine the value.

  Next, when the detection speed is in the predetermined value range in S105 (Yes), the process proceeds to S106, and it is determined whether or not a stop signal is input. The stop signal is input to the control device 113 when the operator turns off the start switch 109. Further, the allowable range for raising and lowering the shutter 103 is determined in advance via the drive control device 104, and a stop signal is also input to the control device 113 when the lower limit and the upper limit of the allowable range are reached.

  Next, in S106, if the stop signal is not input (No), the process proceeds to S104, and S104 to S106 are repeated. If the stop signal is present in S106 (Yes), the process proceeds to S108 and the brake unit 6 performs braking. Activate and end this procedure.

  On the other hand, if the detected speed is not within the range of the predetermined value in S105 (No), the process proceeds to S107, a signal indicating abnormality is displayed on the notification unit 115, and then the process proceeds to S108 to activate the brake by the brake unit. The processing procedure ends.

  Hereinafter, the operation and effect of the shutter fall stop device 105 of the embodiment having the above-described configuration will be described.

  The shutter fall stop device 105 of the present embodiment includes a speed increasing device 4 that increases the rotational speed of the rotating shaft of the drum 102 and outputs it, and a friction engagement with the rotating shaft of the speed increasing device 4 to rotate the speed increasing device. Based on the output speed detected by the speed detector 5 and the speed detector 5 for detecting the rotational speed of the output shaft 3 of the speed increaser 4, the abnormal fall of the shutter 103 is detected. The control unit 113 for operating the brake unit 6 is provided, so that the brake 103 can be braked with high accuracy according to the rotational speed of the drum 102 and the fall of the shutter 103 can be stopped.

  Further, in the shutter fall stop device 105 of the present embodiment, since the rotational torque of the drum 102 is reduced via the speed increaser 4, braking by the brake unit 6 can be surely exhibited, and the shutter 103 can be lifted and lowered. The speed at which the brake unit 6 is actuated can be set in advance for each descent, and the operation of the brake unit 6 and the stop of dropping of the shutter 103 can be obtained with higher accuracy.

  Further, the shutter fall stop device 105 of the present embodiment has a driving motor 106 that rotates the drum 102 at one end of the rotating shaft of the drum 102, and a deceleration that increases the rotational torque by reducing the rotational speed of the driving motor 106. And a motor brake 108 that is connected to the rotation shaft of the drive motor 106 and brakes the rotation of the drive motor. The speed increaser 4, the speed detector 5, and the other end of the rotation shaft of the drum 102 are provided. Since the brake unit 6 is integrally connected, when rotating the drum 102, the rotation of the drive motor 106 can be decelerated via the speed reducer 107, and the drum 102 can be rotated by increasing the rotational torque. When stopping the dropping of the shutter 103, the increased rotational torque is reduced via the speed increaser 4, and the rotation of the drum 102 can be reliably stopped.

  Further, in the shutter fall stop device 105 of the present embodiment, the drive motor 106 and the speed reducer 107 are disposed at one end of the rotating shaft of the drum 102, and the speed increasing device 4 and the brake unit are disposed at the other end of the rotating shaft of the drum 102. 6. Since the speed detector 5 and the like are provided, the brake unit 6 can be operated effectively with a better balance than those provided only in one of the axial directions.

  Further, the shutter fall stop device 105 of the present invention decelerates so that the rotational speed of the input shaft 2 becomes the ratio of the number of teeth of the second internal gear 45 and the second sun gear 44, and then this decelerated. The rotational speed can be reduced so as to be the ratio of the number of teeth of the internal gear 41 and the sun gear 40, and the rotational torque can be reduced and transmitted to the output shaft 3 for each.

  As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example, It can take a various aspect.

It is a block diagram showing the whole structure of the shutter apparatus provided with the fall stop apparatus of the shutter of one Example to which this invention was applied. It is sectional drawing showing the structure of the fall stop apparatus in the Example. It is a flowchart showing the operation | movement procedure of the fall stop apparatus of a present Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Brake unit, 2 ... Input shaft, 3 ... Output shaft, 4 ... Speed up gear, 5 ... Speed detector resistance, 5a ... Rotor, 5b ... Stator, 5c ... First electrode, 5d ... Second Electrode, 5e ... cable, 6 ... electromagnetic brake, 6a ... brake case, 6b ... yoke (electromagnet), 6c ... electromagnetic coil, 6d ... disc brake, 6e ... amateur (brake plate), 6f ... side plate, 6g ... cable, 7, 13, 14, 56 ... bolt, 8 ... intermediate case, 9 ... gearbox case, 10, 11, 12, 20, 50 ... bearing, 17 ... sealing member, 40 ... sun gear, 41 ... internal gear, 42 ... planetary gear, 43 ... carrier, 44 ... second sun gear, 45 ... second internal gear, 46 ... second planetary gear, 47 ... second carrier, 48, 52 ... positioning pin, 49 ... connecting pin, 51, 58 ... Slide plate, 5 2nd connecting pin, 55 ... cover, 57 ... sealing member, 101 ... shutter device, 102 ... drum, 103 ... shutter, 104 ... drive control device, 105 ... fall stop device, 106 ... drive motor, 107 ... speed reducer, DESCRIPTION OF SYMBOLS 108 ... Motor brake, 109 ... Start switch, 110 ... Speed setting part, 111 ... Elevation changeover switch, 112 ... Brake switch, 113 ... Control apparatus, Speed detection part 114, Notification part 115, Brake drive circuit 116.

Claims (3)

A speed increasing device connected to a rotating shaft of a drum that winds up a sheet-like shutter, and increasing the rotational speed of the rotating shaft and outputting the increased speed;
A brake unit that frictionally engages the rotation shaft of the gearbox and brakes the rotation of the gearbox;
A speed detector for detecting the output speed of the speed increaser;
Based on the output speed detected by the speed detector, a control device that detects an abnormal drop of the shutter and operates the brake unit;
A device for stopping and dropping a shutter. At one end of the rotating shaft of the drum,
A drive motor for rotating the drum;
A speed reducer that reduces the rotational speed of the drive motor and increases the rotational torque;
A motor brake connected to the rotation shaft of the drive motor and braking the rotation of the drive motor;
Is provided,
At the other end of the rotating shaft of the drum,
The speed increaser, the speed detector, and the brake unit are integrally connected,
The shutter stop device for a shutter according to claim 1. The gearbox is
A sun gear connected to the output shaft and rotating together with the output shaft;
An internal gear coaxially disposed in the sun gear via a gap;
A planetary gear disposed in the gap and meshing with the sun gear and the internal gear;
A carrier that rotatably supports the planetary gear and is rotatably supported coaxially with the sun gear;
With
The rotating shaft of the drum is connected to the carrier and is configured to rotate with the carrier.
The shutter fall stop device according to claim 1 or 2, wherein:

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