JP5495302B2 - Motor built-in roller - Google Patents

Description

  The present invention relates to a roller with a built-in motor mainly used for a conveyor and the like, and more specifically, for detecting a rotation angle and a rotation direction with high accuracy and for stopping the roller when the motor is stopped. The present invention relates to a motor built-in roller having a brake function.

  Many rollers used in conveyors have a motor built-in roller in which a motor is arranged inside the roller and the roller is driven to rotate by the motor. By the way, as a configuration for controlling the rotation operation of the motor, a configuration for detecting the rotation angle of the motor using a position detection means is known. For example, Patent Document 1 discloses a transport system using a roller with a built-in motor that detects a rotation angle of a motor using a Hall IC as a position detection unit.

JP 2006-96512 A

  Moreover, in such a motor built-in roller, it can be set as a braking device by arrange | positioning a magnet outside a motor for operation control etc. Specifically, as shown in FIG. 7, first, the rotating shaft of the motor is projected from both ends of the cylindrical case member, and the magnet 102 is attached to one side thereof. Further, two magnets 103 are attached to the opposing inner wall surfaces inside the roller body so that different magnetic poles face each other. And it arrange | positions so that the magnet 102 outside a motor may be located between the two magnets 103 provided in the inner wall surface. By doing so, the two magnetic poles of the magnet 102 attached to the outside of the motor attract each other with the two magnets 103 provided on the inner wall surface, thereby braking the rotational drive of the motor.

Therefore, the present inventors considered using the magnet of the braking device as a position detection magnet in order to increase the efficiency of the roller configuration. Specifically, the Hall IC is installed on the magnet side of the braking device provided outside the motor to detect the magnetic field of the braking device magnet.
However, in this measure, since the magnetic field of the magnet 103 provided on the inner peripheral wall inside the roller body interferes with the Hall element of the Hall IC, the rotation angle of the motor cannot be accurately detected and cannot be implemented.

  As a method of solving this problem, as shown in FIG. 8, a method of arranging magnets so that the magnetic field does not interfere with the Hall IC 101 (Hall element) can be considered. However, with this method, there is a problem that the magnetic force acting in the direction perpendicular to the rotation axis of the motor acts in an oblique direction, causing vibration. There is also a problem that the braking force is weakened by the magnetic force acting in an oblique direction.

  Therefore, the present invention pays attention to the above-mentioned problems of the prior art, and even if a position detecting magnet provided outside the motor is used as a part of the braking device, vibration and braking force do not decrease. An object of the present invention is to provide a roller with a built-in motor.

The invention according to claim 1 for solving the above-mentioned problem is a motor-integrated roller in which a motor is incorporated in a roller body, and a braking force generating permanent magnet that rotates synchronously with a rotor of the motor; Detecting means for detecting a magnetic field, wherein the detecting means is in the vicinity of a permanent magnet for generating a braking force and detects a magnetic field generated by the permanent magnet for generating a braking force to acquire rotation information of the motor A temporary magnet is disposed in the vicinity of the braking force generating permanent magnet, the temporary magnet is an iron piece, and the temporary magnet discontinuously surrounds the braking force generating permanent magnet, a motorized roller, characterized in that the braking force is generated in the rotor due to by that brake function the magnetic force between the temporary magnet and the braking force generating permanent magnets.

In the motor built-in roller of the present invention, the braking force generating permanent magnet rotates synchronously with the rotor of the motor, so that the rotation information of the motor is detected by detecting the magnetic field generated by the braking force generating permanent magnet. be able to. In the roller with a built-in motor according to the present invention, since the detecting means is arranged in the vicinity of the braking force generating permanent magnet, the magnetic field of the braking force generating permanent magnet can be detected more accurately. Therefore, the rotation information of the motor can be detected more accurately than when the detection means detects the magnetic field of the rotor inside the motor.
Here, “rotation information” refers to information related to the rotation operation of the motor, such as the rotation direction and rotation angle of the motor.

  In the motor built-in roller of the present invention, the braking force of the rotor is generated by the magnetic force between the braking force generating permanent magnet and the temporary magnet. That is, the braking force generating permanent magnet can be used for two operations of highly accurate detection of the rotation information of the motor and generation of the braking force of the rotor. Therefore, the number of parts can be reduced as compared with a case where a braking device that generates a braking force and a detection device that detects rotation information of the motor with high accuracy are individually provided.

Here, since the temporary magnet does not spontaneously generate a magnetic field, it does not hinder the detection of the magnetic field of the detection means. Therefore, in the motor built-in roller of the present invention, both the temporary magnet and the detection means can be arranged in the vicinity of the braking force generating permanent magnet.
Therefore, the temporary magnet is arranged so that the detecting means is disposed on the side of the permanent magnet for generating the braking force and the direction of the magnetic force generated between the temporary magnet and the permanent magnet for generating the braking force is perpendicular to the rotation axis of the motor. Can be arranged. Therefore, the rotation information of the motor can be detected with high accuracy, and the vibration of the roller body and the decrease of the braking force due to the inclination of the direction of the magnetic force with respect to the rotation axis can be suppressed.
In addition, in the motor built-in roller of the present invention, the mechanism for generating the braking force and the mechanism for detecting the rotation information of the motor can be collectively arranged at the same place, so that the space inside the motor can be effectively utilized.

  Furthermore, the roller with a built-in motor according to the present invention has an advantage that it is less affected by dirt such as dust, dust, and oil than the optical detection device because the detection device detects a magnetic field (magnetism).

According to a second aspect of the present invention, there is provided a motor built-in roller in which a motor is built in a roller body, the braking force generating permanent magnet rotating synchronously with the rotor of the motor, and a detecting means for detecting a magnetic field. The detecting means detects a magnetic field generated by the braking force generating permanent magnet and acquires rotation information of the motor, and a temporary magnet is disposed in the vicinity of the braking force generating permanent magnet. The temporary magnet is an iron piece, and the temporary magnet discontinuously surrounds a permanent magnet for generating a braking force, and the detecting means is in contact with the temporary magnet and generates the braking force with the temporary magnet. a motorized roller, characterized in that the braking force is generated in the rotor due to by that brake function the magnetic force between the use permanent magnets.

  In the roller with a built-in motor according to the present invention, the temporary magnet does not spontaneously generate a magnetic field, is disposed in the vicinity of the permanent magnet for generating the braking force, and the detection means is in contact with the temporary magnet. Therefore, the detection means can detect the magnetic field of the braking force generating permanent magnet via the temporary magnet. As a result, even when the detection means and the braking force generating permanent magnet are separated, the magnetic field generated by the braking force generating permanent magnet can be detected with high accuracy. Therefore, there are less restrictions on the arrangement of members in the main body of the motor built-in roller, and various designs in the roller main body are possible.

The invention according to claim 3 is a motor built-in roller in which a motor is built in a roller body, and the motor includes a rotor composed of a permanent magnet or a coil, a stator composed of a coil, A brushless motor having a detecting means for detecting a rotation posture of the rotor and generating a signal for switching the direction of the current flowing through the stator, and a braking force generating permanent magnet that rotates synchronously with the rotor The detecting means is for detecting a magnetic field, and the detecting means is in the vicinity of the permanent magnet for generating the braking force, and detects the magnetic field of the permanent magnet for generating the braking force to detect a current flowing through the stator. to generate a signal for switching the direction, and one o'clock magnet is disposed in the vicinity of the braking force generating permanent magnets, the one o'clock magnet is iron piece, the one o'clock magnet, the periphery of the permanent magnet braking force generation not It is intended to enclose the connection, a motorized roller, characterized in that the braking force is generated in the rotor due to by that brake function the magnetic force between the braking force generating permanent magnets and the temporary magnet.

  In the roller with a built-in motor of the present invention, a brushless motor can be used as the built-in motor, and a signal for switching the current flowing through the stator of the brushless motor can be generated based on the information detected by the detecting means. That is, since the operation of the brushless motor is controlled by the detection means provided outside the brushless motor, in addition to the above-described advantages, there is an advantage that the motor operation control can be easily incorporated into a control computer system or the like.

  The invention according to claim 4 is the motor built-in roller according to any one of claims 1 to 3, wherein the detecting means is a Hall IC.

  In the motor built-in roller of the present invention, a Hall IC is used as the detecting means. Therefore, the rotation amount and rotation direction of the motor can be detected in a non-contact state. Therefore, the life of the detection means can be extended compared to the contact type sensor. There is also an advantage that it can be easily incorporated into a circuit.

In the motor built-in roller according to any one of claims 1 to 4, the temporary magnet is an iron piece .

  This makes it possible to use an inexpensive and stable temporary magnet, thereby reducing the manufacturing cost of the motor built-in roller and obtaining a stable braking force.

The invention described in claim 5 is the motor built-in roller according to any one of claims 1 to 4 , wherein a control board is provided in the roller body.
The invention related to the present invention further includes a braking force generating permanent magnet that rotates synchronously with the roller, and a detecting means for detecting a magnetic field, the detecting means being in the vicinity of the braking force generating permanent magnet. The rotation force of the roller is obtained by detecting the magnetic field generated by the permanent magnet for generating the braking force, and a temporary magnet is disposed in the vicinity of the permanent magnet for generating the braking force. This is a roller characterized in that the braking force of the rotor is generated by the magnetic force between the permanent magnet for use.

  The roller of the present invention has a detecting means for detecting the magnetic field of the permanent magnet for generating the braking force and acquiring the rotation information of the roller, and the braking force of the roller is generated by the magnetic force between the permanent magnet for generating the braking force and the temporary magnet. Is generated. In other words, the braking force generating permanent magnet can be used for two operations: detection of roller rotation information and generation of rotor braking force. Therefore, it is possible to reduce the number of parts compared to a case where a braking device that generates a braking force and a detection device that detects rotation information of the motor are provided separately.

  Here, since the temporary magnet does not spontaneously generate a magnetic field, it does not hinder the detection of the magnetic field of the detection means. Therefore, in the roller of the present invention, both the temporary magnet and the detection means can be arranged in the vicinity of the braking force generating permanent magnet. As a result, the distance between the detection means and the braking force generating permanent magnet can be shortened, so that highly accurate detection is possible.

  Another related invention has a braking force generating permanent magnet that rotates synchronously with a roller and a detecting means for detecting a magnetic field, and the detecting means detects a magnetic field generated by the braking force generating permanent magnet. The rotation information of the roller is obtained, and a temporary magnet is disposed in the vicinity of the permanent magnet for generating a braking force, and the detection means is in contact with the temporary magnet, and the temporary magnet and the braking force are generated. The roller is characterized in that the braking force of the rotor is generated by the magnetic force between the permanent magnet.

  In the roller of the present invention, the temporary magnet does not spontaneously generate a magnetic field, is disposed in the vicinity of the permanent magnet for generating braking force, and the detection means is in contact with the temporary magnet. Therefore, the detection means can detect the magnetic field of the braking force generating permanent magnet via the temporary magnet. As a result, even when the detection means and the braking force generating permanent magnet are separated, the magnetic field generated by the braking force generating permanent magnet can be detected with high accuracy. Therefore, there are fewer restrictions when arranging the members in the roller body, and various designs in the roller body are possible.

  Further, the related invention is the above roller, wherein the detection means is a Hall IC.

  Further, the related invention is the above-described roller, wherein the temporary magnet is an iron piece.

  The roller of the present invention has advantages such as extending the life of the detection device, reducing the manufacturing cost, and obtaining a stable braking force for the same reason as the above-described motor built-in roller.

  The roller with a built-in motor according to the present invention can detect the rotation angle of the motor more accurately, and can reduce the vibration of the roller during rotation driving and the decrease in braking force during braking operation. In addition, the number of parts can be reduced as compared with the conventional one, and the space inside the roller can be widely used.

It is sectional drawing which shows the roller with a built-in motor which is 1st embodiment of this invention. It is the perspective view which fractured | ruptured a part which shows the inside of the cylinder 7 of the roller with a built-in motor of FIG. It is AA sectional drawing which shows typically the relationship between the rotating magnet shown in FIG. 1, and a brake piece. It is a block diagram which shows control of the roller with a built-in motor of FIG. It is sectional drawing which shows the motor built-in roller which is 2nd embodiment of this invention. It is a perspective view which shows the free roller which is 3rd embodiment of a reference invention. It is sectional drawing which shows an example of the conventional motor built-in roller. It is sectional drawing which shows an example of the conventional motor built-in roller.

  Next, the motor built-in roller 1 according to the first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of the motor built-in roller according to the present embodiment, but is omitted without hatching. As shown in FIGS. 1 and 2, the roller 1 with a built-in motor according to the present invention includes a cylindrical body 7 having the same shape as the roller body 2 inside a roller body 2 that is a substantially cylindrical member having a space inside. Has been. A drive motor 3 (motor), a control board 18 and a speed reducer 14 are provided inside the cylinder body 7. Further, an output member 8 is provided so as to protrude from one end of the cylindrical body 7. The output member 8 rotates with the operation of the drive motor 3, and the roller body 2 rotates relative to the cylindrical body 7 by the rotation of the output member 8. This will be specifically described below.

  The roller body 2 is a cylindrical member, and is provided with closing members 16 and 22 at both ends. The closing members 16 and 22 are cap-like members that close the openings at the ends of the roller main bodies 2 having different shapes. Specifically, each of the shapes follows the shape of the end portion of the roller body 2, and can be integrally fixed to the end portion of the roller body 2.

  The closing member 16 has a through hole and a step in the central portion. A ball bearing 21, which is a well-known ball bearing, can be inserted into the step, and a shaft portion 23a of a shaft mounting member 23 described later can be inserted into the through hole.

  The closing member 22 has a through hole in the center portion, and a ball bearing 24 that is a well-known ball bearing can be disposed in the vicinity of the through hole, and a fixed shaft 29 can be inserted therethrough.

  The cylindrical body 7 is a cylindrical member that can be inserted into the roller body 2, and a shaft mounting member 23 is integrally provided on one of the end portions. The shaft attachment member 23 is a substantially cylindrical member having a flange-like portion at the end, and has a through-hole through which the cable 15 (electric supply wire) can be inserted.

The drive motor 3 employs a known brushless motor, and has a stator and a rotor (not shown) inside the motor body 3a. The direction of the current flowing through the stator by a semiconductor switch and an external signal is set. It can be changed.
In this embodiment, as shown in FIGS. 1 and 3, the rotating shaft 3b protrudes from both ends of the motor body 3a, and the rotating magnet 4 (controlling) magnetized to four poles is formed at one end of the rotating shaft. A permanent magnet for power generation) is arranged, and a brake piece 5 (temporary magnet) is arranged so as to surround the rotating magnet 4. That is, the brake piece 5 is disposed outside the rotating magnet 4 and inside the cylinder body 7. With this configuration, resistance is given to the rotation of the drive motor 3. That is, the rotating magnet 4 and the brake piece 5 form a cogging brake function that performs a braking function. The brake piece 5 is fixed to the inner wall of the cylinder 7.
Further, by detecting the magnetic field generated by the rotating magnet 4 with two Hall ICs (detecting means) described later, the rotational speed of the driving motor can be recognized as a pulse signal.

  The rotating magnet 4 has a substantially cylindrical shape and has a through-hole into which the rotating shaft of the driving motor 3 can be inserted at the center. The rotating magnet 4 is magnetized to four poles as described above. Specifically, as shown in FIG. 3, two different magnetic poles are magnetized at positions adjacent to each other, and each has two two magnetic poles. As the rotating magnet 4, a suitable one such as an alnico magnet, a ferrite magnet, or a neodymium magnet that generates a magnetic field without receiving a magnetic field or a current is used.

  As shown in FIGS. 1 and 3, the brake piece 5 is a plate-like member bent so as to have a substantially U-shaped cross section, and is an iron piece formed of soft iron. Since the brake piece 5 does not spontaneously generate a magnetic field, it does not hinder the detection of the magnetic field performed by the Hall IC 6 described later.

On the other hand, a speed reducer 14 is disposed at the other end of the rotating shaft 3 b protruding from the motor body 3 a of the drive motor 3, and is connected to the output member 8 via the speed reducer 14.
The speed reducer 14 includes a planetary gear unit 17 having a well-known planetary gear mechanism, and can reduce the rotation of the rotary shaft 3b connected to the center of the planetary gear unit 17 and transmit it to the output member 8. is there. In the motor built-in roller 1 of the present embodiment, the speed reducer 14 has two planetary gear portions 17 and one planetary gear portion 17a having substantially the same configuration arranged in three stages. Thereby, the rotation of the drive motor 3 can be decelerated and the rotation can be stably conducted to the output member 8.

  The output member 8 conducts the rotational force of the driving motor 3 to the roller body 2, and a part of the output member 8 (inner cylinder placement portion 35) is arranged inside the cylinder body 7, and the remaining portion (outer cylinder mounting portion) 36) is located outside the cylinder 7. Specifically, since the inner cylinder placement portion 35 is connected to the speed reducer 14 in a non-contact manner with the cylinder 7, the cylinder 7 is not rotated together with the output member 8 by the rotation of the speed reducer 14. That is, even if the output member 8 rotates, the cylinder 7 does not rotate.

  Further, the outer cylinder mounting portion 36 has an outer diameter slightly larger than that of the cylindrical body 7, and when the output member 8 is disposed inside the roller main body 2, the outer cylinder mounting portion 36 is located inside the roller main body 2. And a mating state. That is, the roller body 2 rotates together with the output member 8. Accordingly, when the reduced rotation of the drive motor 3 is transmitted to the output member 8, the roller body 2 rotates at the reduced speed.

  The control board 18 has a substantially rectangular plate shape and has a control IC mounted thereon. The control board 18 is located in the vicinity of the central axis of the cylinder 7 and is disposed at a position facing the speed reducer 14 with the drive motor 3 interposed therebetween, and is fixed to the cylinder 7 so as not to rotate together with the drive motor 3. ing. In addition, a cable 15 that can be connected to an external power source is connected to the control board 18.

The control board 18 is provided with two Hall ICs 6 at positions facing the rotating magnet 4. It is the same as a well-known Hall IC, and is an element in which a Hall element that is a magnetic sensor and an IC that converts the output signal of the Hall element into a digital signal are integrated.
Therefore, the Hall IC 6 can detect the magnetic field of the rotating magnet 4 attached to the driving motor 3 and transmit the rotation speed of the driving motor 3 to the information receiving unit 25 described later as a pulse signal. By arranging two of these, two-phase pulse signals having different phases are detected. That is, by providing the two Hall ICs 6, it is possible to detect the rotation direction (forward rotation and reverse rotation) of the rotating magnet 4. Therefore, the rotational speed and rotational direction of the driving motor 3 can be detected by the rotating magnet 4 and the two Hall ICs 16.

  And the control board 18 has a structure which can process the information which Hall IC6 output. That is, as shown in FIG. 4, the control board 18 receives an information receiving unit 25 that receives a signal transmitted from the Hall IC 6, and rotation information (a signal transmitted from the Hall IC 6 and received by the information receiving unit 25. And the rotation direction), a comparison correction unit 27 capable of comparing and calculating the rotation information received by the information receiving unit 25 and the rotation information stored in the storage unit 26, and a comparison correction unit 27 And a motor control unit 28 for controlling the driving motor 3 by receiving the signal compared in (1).

  The storage unit 26 stores the rotation information (the number of rotations and the rotation direction) received by the information receiving unit 25. That is, the number of rotations can be accumulated from the information received by the information receiving unit 25, and the calculated number of rotations can be stored together with the rotation direction.

  The comparison correction unit 27 is connected to the information receiving unit 25 and the storage unit 26, and performs calculations using information received from the Hall IC and information stored in the storage unit 26. Then, a signal for causing the drive motor 3 to perform a specific operation and a signal for stopping the drive motor 3 are generated and transmitted to the motor control unit 28.

  The motor control unit 28 receives signals processed by the information receiving unit 25, the storage unit 26, and the comparison and correction unit 27 and issues a command to the driving motor 3.

  Next, the assembly structure of the motor built-in roller 1 of this embodiment will be described.

As shown in FIG. 1, the motor built-in roller 1 has a cylindrical body 7 built in a roller body 2. At this time, the shaft portion 23 a of the shaft mounting member 23 is inserted into the through hole in the central portion of the closing member 16. Since the ball bearing 21 is attached around the through hole of the closing member 16, the shaft portion 23 a is disposed inside the ball bearing 21. Therefore, the closing member 16 can be rotated relative to the shaft portion 23a. Here, since the shaft attachment member 23 is integrally attached to the end of the cylinder 7, the closing member 16 is rotatable relative to the cylinder 7 and the shaft attachment member 23 (shaft portion 23 a). It has become.
A cable 15 is inserted through the through hole in the central portion of the shaft portion 23a, and the cable 15 connects an external power source (not shown) and the control board 18.

  A ball bearing 24 is attached in the vicinity of the through hole of the closing member 22, and a fixed shaft 29 is inserted inside the ball bearing 24. That is, since the fixed shaft 29 is inserted through the through-hole of the closing member 22 via the ball bearing 24, the closing member 22 is attached to be rotatable relative to the fixed shaft 29.

Both the blocking members 16 and 22 are integrally attached to the roller body 2. Further, the shaft portion 23 a and the fixed shaft 29 are disposed at both ends of the roller body 2 and on the central axis of the roller body 2. Therefore, the roller body 2 can rotate relative to the shaft portion 23 a and the fixed shaft 29.
In other words, the motor built-in roller 1 is attached so that the cylindrical body 7, the shaft portion 23a, and the fixed shaft 29 do not rotate even when the roller body 2 rotates.

  As shown in FIG. 1, the output member 8, the speed reducer 14, the drive motor 3, the rotating magnet 4, the brake piece 5, and the control board 18 are arranged in this order from the closing member 22 side. Yes. Specifically, in order, the output member 8 is arranged at an arbitrary interval from the closing member 22. The output member 8 is arranged such that the outer cylinder mounting portion 36 is mounted at a predetermined position of the roller body 2, and the inner cylinder mounting portion 35 is positioned in a non-contact state inside the cylinder body 7 and the speed reducer 14. It is connected. That is, the output member 8 rotates the roller body 2 integrally. In other words, the output member 8 and the cylinder 7 rotate relatively.

  A rotating shaft 3 b is disposed on the shaft of the cylinder 7, and one end of the rotating shaft 3 b is connected to the output member 8 via the speed reducer 14. The other end is provided with a rotating magnet 4 with a driving motor 3 interposed therebetween. The rotating magnet 4 is surrounded by two brake pieces 5.

  A control board 18 having a shape extending from the vicinity of the rotating magnet 4 in the direction of the closing member 16 is disposed. The control board 18 is arranged in parallel with the central axis of the cylindrical body 7. The control board 18 is provided with two Hall ICs 6 on the rotating magnet 4 side. That is, the Hall IC 6 is disposed at a position close to the rotating magnet 4 and can receive a pulse signal accompanying the rotation of the driving motor 3 from the rotating magnet 4.

  Then, the shaft portion 23a and the fixed shaft 29 of the motor-equipped roller 1 are inserted into a fixing member such as a known conveyor device and used.

  Hereinafter, the operation when the roller with built-in motor 1 of the present embodiment is used in a conveyor device or the like will be described.

  First, the drive motor 3 is activated to rotate the rotating shaft 3b. Then, the rotation of the rotating shaft 3 b is transmitted to the output member 8 via the speed reducer 14, and the roller body 2 starts to rotate relative to the shaft portion 23 a, the fixed shaft 29, and the cylindrical body 7. The rotating magnet 4 also starts to rotate relative to the cylinder 7 by the rotation of the rotating shaft 3b.

  At this time, the Hall IC 6 provided in the vicinity of the rotating magnet 4 detects the rotation information (rotating direction and rotating speed) of the rotating magnet 4 and transmits it to the information receiving unit 25 of the control board 18. At this time, since the brake piece 5 arranged in the vicinity of the Hall IC does not spontaneously generate magnetism, detection of the magnetic field of the rotating magnet 4 of the Hall IC 6 is not hindered. Therefore, highly accurate detection can be performed compared with the case where the brake piece 5 is a permanent magnet.

  Then, the information receiving unit 25 that has received the rotation information transmits the rotation information to the storage unit 26, and the storage unit 26 performs an appropriate calculation such as integration of the number of rotations on the received information as necessary, The received information or calculation result is stored.

  The comparison correction unit 27 calculates rotation information transmitted from the information receiving unit 25 or the storage unit 26 to determine whether the roller body 2 is rotating according to a predetermined speed or direction. When it is determined that the roller body 2 is not performing the determined operation, a command for controlling the rotation of the driving motor 3 is transmitted to the motor control unit 28, and the motor control unit 28 rotates the driving motor 3. Adjust the speed.

  As a result, the motor built-in roller 1 can continue to perform a precise operation by operating with fine adjustment.

  Next, a case where the rotational drive of the motor built-in roller 1 is stopped will be described. First, the drive motor 3 is stopped. At this time, since a magnetic force acts between the permanent magnet 4 and the brake piece 5 in the attracting direction, a force is applied from the permanent magnet 4 to the rotation shaft 3b in a direction in which the rotation is stopped. As a result, the rotation of the rotating shaft 3b decelerates with time and eventually stops. Accordingly, the rotational drive of the speed reduction device 14 and the output member 8 also continues to decelerate and stops. Then, the rotation of the roller body 2 interlocked with the output member 8 is similarly stopped.

In the present embodiment, a soft iron piece is used for the brake piece 5, but the brake piece 5 is not limited to this. Iron may be used instead of soft iron, or other materials such as nickel may be used. Moreover, you may use what wound the coil like an electromagnet.
In short, it is sufficient that the attractive force acts between the Hall IC 6 (detection means) and the rotating magnet 4 without obstructing the magnetic detection.

  Moreover, in this embodiment, although the brake piece 5 is bent in circular arc shape, not only circular arc shape but flat form may be sufficient. When the arc is bent, the bending angle can be changed as appropriate. However, when the rotating magnet 4 is magnetized to four poles as in this embodiment, the brake piece 5 is bent at an opening angle of about 120 degrees. This is preferable because the power is increased.

  In the present embodiment, the configuration in which two Hall ICs 6 are provided is shown, but the present invention is not limited to this, and three or more Hall ICs may be provided, or one. Further, the detection means is not limited to the Hall IC 6, and it is sufficient that the rotation information of the drive motor 3 can be acquired by detecting magnetism.

  In the present embodiment, the configuration in which the rotating magnet 4 is magnetized to four poles is shown, but the present invention is not limited to this, and may be four poles or less, such as two poles, or six poles. As such, four or more poles may be used.

In the present embodiment, the rotation speed and direction of the drive motor 3 are controlled by the rotation information acquired by the Hall IC 6, but the control using the rotation information by the control board 18 is not limited to this.
For example, the configuration may be such that the change in the direction of the current flowing in the stator of the driving motor that is a brushless motor is controlled.

  In the present embodiment, the rotating shaft 3b protruding from the motor body 3a of the driving motor 3 is configured such that the same shaft protrudes from a different location, but two different shafts may protrude. In short, the projecting portion may be rotated at the same speed in the same direction during rotation.

  In the present embodiment, a brushless motor is used as the drive motor 3, but the drive motor 3 is not limited to this. For example, a DC motor having a brush may be used.

  Next, the motor built-in roller 40 according to the second embodiment of the present invention will be described with reference to the drawings. In addition, about the same description, such as the structure similar to the motor built-in roller 1 in 1st embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  As shown in FIG. 5, the motor built-in roller 40 according to the second embodiment of the present invention is provided with the Hall IC 6 at a position in contact with the brake piece 5.

  In the present embodiment, the brake piece 5 does not spontaneously generate a magnetic field, and only the rotating magnet 4 spontaneously generates a magnetic field. Therefore, the Hall IC 6 can detect the magnetic field of the rotating magnet 4 without receiving interference of the magnetic field from the brake piece 5. Therefore, the magnetic field of the rotating magnet 4 can be detected with high accuracy even when the Hall IC 6 is located away from the rotating magnet 4.

  Next, an embodiment according to the reference invention will be described. As shown in FIG. 6, the roller 41 according to the third embodiment (reference invention) is provided with a brake piece and a rotating magnet on a roller 41 that does not incorporate a motor.

  The roller 41 is a so-called free roller and includes a Hall IC 6, a roller body 43, a lid member 44, a fixed shaft 45, a brake piece 46, and a rotating magnet 47.

  The roller body 43 is a cylindrical member having a space inside.

  The lid member 44 is a disk-shaped member having a flange portion, and a known bearing is attached in the vicinity of the inner wall of the through hole.

  The fixed shaft 45 is a pipe-shaped member having a circular cross section.

  The brake piece 46 is a temporary magnet formed of soft iron, and is a donut-shaped member having a through hole in the central portion.

  The rotating magnet 47 is a permanent magnet, and is a plate-like member bent into a substantially “U” shape.

  A lid member 44 having a through hole at the center is integrally attached to both ends of the cylindrical roller body 43. A fixed shaft 45 is inserted into the through hole of each lid member 44. That is, it is pivotally supported on the fixed shaft 45 via the lid member 44. In other words, the roller body 43 can rotate relative to the fixed shaft 45.

  Further, one of the fixed shafts 45 is inserted through the through hole of the brake piece 46 at the end located on the inner side of the roller body 43. That is, the brake piece 46 is integrally attached to the fixed shaft 45 so that the brake piece 46 is positioned inside the roller body 43. A rotating magnet 47 is disposed so as to surround the brake piece 46. That is, the rotating magnet 47 is disposed outside the brake piece 46 and inside the roller body 43. With this configuration, resistance is given to the rotation of the roller 41. That is, the brake piece 46 and the rotating magnet 47 form a cogging brake function that performs a brake function. The rotating magnet 47 is fixed to the inner wall of the roller body 43.

  The Hall IC 6 is integrally attached to the outer periphery of the brake piece 46, and by detecting the magnetic field of the rotating magnet 47 provided on the roller body 43, the rotation direction and rotation angle of the roller 41 can be detected. . The Hall IC 6 can transmit the detected information to an external substrate (not shown) via a communication line inserted into the fixed shaft 45.

  According to the present embodiment, the rotation direction and rotation angle of the roller 41 that is a free roller can be detected, and rotation information can be acquired from a roller that is not provided with a motor in a conveyor or the like. In addition, it is possible to brake the roller 41, and it is possible to reduce the occurrence of erroneous detection such as acquiring rotation information of the roller that continues to rotate due to inertia when the conveyor is stopped. Therefore, it becomes possible to perform more precise conveyance control of the conveyor.

In each of the above-described embodiments, an example in which the motor built-in roller and the free roller (reference invention) of the present invention are used for conveyors is shown, but the motor built-in roller and roller of the present invention are not limited thereto. For example, the motor built-in roller or roller of the present invention may be used as a curtain winding roller or scroll motor built-in roller. In short, the motor-equipped roller and the roller of the present invention can be used as long as the cylindrical rotating object is structured to rotate around the shaft portion by an internal driving device or external force.

DESCRIPTION OF SYMBOLS 1 Motor built-in roller 2 Roller body 3 Drive motor 4 Permanent magnet (Permanent magnet for generating braking force)
5 Brake piece (temporary magnet)
6 Hall IC (detection means)

Claims (5)

A motor built-in roller with a motor built in the roller body,
A braking force generating permanent magnet that rotates synchronously with the rotor of the motor; and a detecting means for detecting a magnetic field, the detecting means being in the vicinity of the braking force generating permanent magnet and for generating the braking force. Detecting the magnetic field generated by the permanent magnet to acquire the rotation information of the motor, a temporary magnet is disposed in the vicinity of the permanent magnet for generating the braking force, the temporary magnet is an iron piece, the temporary magnet is , which surrounds the braking force generating permanent magnets discontinuously, characterized in that the braking force is generated in the rotor due to by that brake function the magnetic force between the temporary magnet and the braking force generating permanent magnets Motor built-in roller. A motor built-in roller with a motor built in the roller body,
A braking force generating permanent magnet that rotates synchronously with the rotor of the motor; and a detecting means for detecting a magnetic field, wherein the detecting means detects a magnetic field generated by the braking force generating permanent magnet. The temporary magnet is arranged in the vicinity of the braking force generating permanent magnet, the temporary magnet is an iron piece, and the temporary magnet does not surround the permanent magnet for generating the braking force. is intended to enclose the continuous, characterized in that said detecting means is in contact with the temporary magnet, to generate a braking force of the rotor by by that brake function the magnetic force between the braking force generating permanent magnet and the one o'clock magnet Motor built-in roller. A motor built-in roller with a motor built in the roller body,
The motor detects a rotor configured by a permanent magnet or a coil, a stator configured by a coil, and a signal for switching a direction of a current flowing through the stator by detecting a rotational posture of the rotor. A brushless motor with means,
A permanent magnet for generating braking force that rotates synchronously with a rotor; and the detecting means detects a magnetic field, and the detecting means is in the vicinity of the permanent magnet for generating braking force, and generates the braking force. Detecting a magnetic field of the permanent magnet for generating a signal for switching the direction of the current flowing through the stator, a temporary magnet is disposed in the vicinity of the permanent magnet for generating the braking force, and the temporary magnet is an iron piece, wherein one o'clock magnet, which surrounds the braking force generating permanent magnets discontinuously, generating a braking force of the rotor by by that brake function the magnetic force between the braking force generating permanent magnets and the temporary magnet A roller with a built-in motor.   The motor built-in roller according to any one of claims 1 to 3, wherein the detecting means is a Hall IC. The roller with a built-in motor according to claim 1 , wherein a control board is provided in the roller body.

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