JP2011116566A - Motor built-in roller and motor unit for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor built-in roller which allows easy assembly of a roller conveyor device. <P>SOLUTION: The roller with built-in motor 3 has a cylindrical roller body 11 in which a motor 12 and a reduction gear 13 are built. The motor built-in roller 3 has fixed shafts 20, 21 protruded from both ends of the roller body 11. One fixed shaft 20 is hollow-shaped in which a fixed side connector piece 25 is built. A free side connector piece 33 is connected to the fixed side connector piece 25. An inner screw (shaft side engaging part) 24 is provided on the fixed shaft 20 for preventing the fall-off of the free side connector piece 33. A screw forming part 37 of the free side connector piece 33 engages with the shaft side engaging part 24. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a motor built-in roller in which a motor is built in a roller body. The present invention also relates to a motor unit constituting a motor built-in roller.

A motor built-in roller is known as a component of a roller conveyor device. As disclosed in Patent Document 1, the motor built-in roller has a motor and a speed reducer built in the roller body, and the outer roller body rotates by driving the internal motor.
FIG. 24 is a cross-sectional view of the motor built-in roller disclosed in Patent Document 1.
In the known motor built-in roller 100, a fixed shaft 110 passes through the roller body 101. In addition, lid members 102 are provided at both ends of the roller body 101, and both ends 105 and 106 of the fixed shaft 110 protrude from the lid member 102. One fixed shaft end 105 has a hollow shape, and an electric cable 107 is inserted through the fixed shaft end 105, and power is supplied to the motor 103 built in the roller body 101 via the electric cable 107.
In some cases, a connector piece 111 is provided at the tip of the electric cable 107 for the purpose of facilitating electric wiring. Patent Document 1 described above discloses a configuration example in which the connector piece 111 is provided at the tip of the electric cable 107.

  In Patent Document 1, the connector piece 111 is provided at the tip of the electric cable 107. However, Patent Documents 2 and 3 disclose a motor built-in roller having a structure in which the connector piece is incorporated in a fixed shaft. According to the configurations of Patent Documents 2 and 3, a connector piece is built in the hollow portion of the fixed shaft of the roller with a built-in motor, and a separately prepared connector piece is connected to the fixed shaft to perform power feeding and signal transmission / reception.

Further, Patent Document 4 discloses more specifically a configuration in which the connector piece is incorporated into the fixed shaft.
That is, the motor built-in roller disclosed in claim 1 of Patent Document 4 is
A fixed roller shaft;
A generally cylindrical drum rotatably held about the axis of the fixed roller shaft;
An electric drive unit held on a roller shaft and provided in the cylindrical drum so as not to be interlocked with the rotation of the drum around the roller shaft;
A recess formed at one end of the roller shaft;
A first electrical connector provided in a recess formed at one end of the roller shaft and electrically connected to the electrical drive unit;
A second power supply connected to the power supply and configured to conform to the first connector and connected to the first connector to allow the electric drive unit to be energized. A motor-equipped pulley or roller having a connector.

FIG. 25 is a cross-sectional view of the motor built-in roller disclosed in Patent Document 4.
In the motor built-in roller disclosed in Patent Document 4, a fixed shaft 121 passes through the roller body 120, and a motor 122 serving as an electric drive unit is held on the fixed shaft 121.
In other words, in the motor built-in roller disclosed in Patent Document 4, the fixed shaft 121 passes through the roller body 120, and the rotor 123 of the motor 122 is attached to the fixed shaft 121. The stator 125 of the motor 122 is also fixed to the fixed shaft 121.
As described above, in the motor built-in roller disclosed in Patent Document 4, all the members of the motor 122 serving as the electric drive unit are in a position surrounding the fixed shaft 121, and the term “held on the roller shaft and An electric drive unit provided in the cylindrical drum so as not to be interlocked with the rotation around the roller axis of the drum is realized.

Patent Documents 5 and 6 disclose a motor unit that constitutes a motor built-in roller by being combined with a roller body.
The motor units disclosed in Patent Documents 5 and 6 are an integrated motor and speed reducer, and a motor built-in roller of any length is completed by inserting the motor unit into a separately prepared roller body. Is. The motor unit disclosed in Patent Documents 5 and 6 has a cylindrical case, a fixed short shaft projects from one end side thereof, and an output member is provided on the other end side.
That is, the motor units disclosed in Patent Documents 5 and 6 have a cylindrical case, and the fixed short axis is fixed integrally to the end of the case. In the motor units disclosed in Patent Documents 5 and 6, the fixed short shaft is a very short shaft and is only fixed integrally with the case, and the end of the fixed short shaft is the opening of the case. Broken at the edge. For this reason, the fixed short axis does not penetrate the case, and the fixed short axis does not exist inside the case. A motor and a speed reducer are built in the space in the case. The output shaft of the speed reducer protrudes from the other end side of the case, and an output member is attached.

The motor units disclosed in Patent Documents 5 and 6 are inserted into a separately prepared roller body, and the output member is engaged with the inner surface of the roller body.
The fixed short shaft of the motor unit is supported by the opening end of the roller body via a bearing, and the tip of the fixed shaft protrudes from the roller body to serve as the fixed shaft of the motor built-in roller itself.

  A separate short shaft is rotatably attached to the other end side of the roller body, and this short shaft is used as a fixed shaft on the other end side of the motor built-in roller itself.

In the motor built-in roller employing the motor unit of Patent Documents 5 and 6, the fixed shaft does not penetrate the roller body. That is, in the motor built-in roller employing the motor units of Patent Documents 5 and 6, the fixed shafts at both ends are short in length and are only provided at both ends of the roller body.
More specifically, one fixed shaft supports only one end of the roller body and one end of the case of the motor unit. The other fixed shaft supports only the other end of the roller body. In the motor built-in roller employing the motor unit of Patent Documents 5 and 6, the electric drive unit is not held on the roller shaft, and does not have the configuration requirements of Patent Document 4.

  In Patent Document 7, the conveyor device is divided into zones, each zone is provided with a sensor for detecting the presence of the object to be conveyed, the object to be conveyed exists in its own zone, and the object to be conveyed exists in the front zone. A conveyor device is disclosed that drives a roller with a built-in motor when conditions such as not being met are met. In the conveyor device disclosed in Patent Document 7, the roller with a built-in motor is driven only when necessary. Therefore, in the conveyor apparatus disclosed in Patent Document 7, the motor built-in roller frequently repeats starting and stopping.

JP 2004-18184 A Japanese Utility Model Publication No. 63-133515 Japanese Utility Model Publication No. 63-133516 US Pat. No. 5,442,248 JP 2002-145438 A US Pat. No. 6,672,449 JP 2005-67811 A

The present inventors modified the motor built-in roller having a structure incorporating the motor unit as described in Patent Documents 5 and 6 above, and prototyped a configuration in which the connector piece was built in one of the fixed shaft ends 105 and 106.
Here, since the motor built-in roller described in Patent Documents 5 and 6 employs a motor unit, the compatibility of parts is high, and as described above, an effect of completing a motor built-in roller of an arbitrary length. There is.

That is, in the motor built-in roller that does not employ a motor unit, as shown in Patent Documents 1, 2, 3, and 4, the fixed shaft penetrates the roller body. In addition, the dimensions of each part will change. Therefore, when adopting a structure in which the fixed shaft penetrates the roller body, if an order is received for a motor built-in roller with a non-standard length, the length of each part must be redesigned and parts must be manufactured individually.
On the other hand, the motor built-in roller employing the motor unit of Patent Documents 5 and 6 can be completed by inserting the motor unit into the roller body, and is not restricted by the length of the roller body. From this, it is possible to manufacture a roller with a built-in motor having an arbitrary length.
In addition, a motor built-in roller having an arbitrary thickness can be manufactured by changing the diameter of the output member.

Then, the inventors improved the motor built-in roller employing the motor unit disclosed in Patent Documents 5 and 6, and prototyped a configuration in which the connector piece was incorporated into the fixed short shaft. However, the prototype motor built-in roller has an unexpected defect.
That is, the prototype motor built-in roller has a fixed side connector piece built in the fixed short shaft of the motor unit, and the free side connector piece is connected to the fixed side connector piece of the fixed short shaft. The free-side connector piece sometimes comes off while being incorporated into a conveyor.

When this cause was examined, the motor built-in roller employing the motor unit is compared with the motor built-in roller having a structure in which the fixed shaft penetrates the roller body as disclosed in Patent Documents 1, 2, 3, 4 and the like. The vibration of the fixed shaft is large, and the free side connector piece comes off because the fixed shaft vibrates.
That is, as shown in FIG. 26, the motor built-in roller receives a rotational force A due to conveyance and a vertical load B due to the gravity of the conveyed object.

  The fixed shaft bears the reaction force C of the rotational force A caused by the conveyance. Here, in the motor built-in roller having a structure in which the fixed shafts of Patent Documents 2, 3, 4 and the like pass through the roller body, the fixed shafts at both ends equally bear the reaction force C described above. In contrast, in a motor built-in roller using a motor unit, a reaction force C is applied only to a fixed shaft on one side. Therefore, in the motor built-in roller using the motor unit, the reaction force applied to the fixed shaft on the side where the connector is attached is large.

  In the motor built-in roller employing the motor unit, the fixed shaft only supports the end of the case of the motor unit, and the motor and the speed reducer are held by the case, so the transmission path of the reaction force C is long. . Therefore, a large amount of energy is accumulated until the motor is started and the rotational force is first transmitted to the fixed shaft. More specifically, in the motor built-in roller employing the motor unit, the reaction force C is transmitted to the fixed shaft via a number of parts, but there is a gap in each part little by little. Therefore, when the motor starts, the gap between each part is clogged and power is transmitted to the next part, and the gap between the parts engaged with the part is clogged and power is transmitted to the next part, and this operation is repeated. The reaction force C is transmitted to the fixed shaft. Therefore, the kinetic energy of each component is accumulated until the rotational force is first transmitted to the fixed shaft after the motor is started, and this force is applied to one fixed shaft in an impact.

  Furthermore, since the motor built-in roller bends as shown in FIG. 27 due to the load B due to the gravity of the conveyed object, the fixed shaft also swings in the vertical direction. However, the motor built-in roller using the motor unit The amount of bending is large, and the amount of rocking of the fixed shaft is large. That is, in the motor built-in roller disclosed in Patent Documents 1, 2, 3, 4 and the like, the fixed shaft penetrates or is connected in the axial direction. It is carried by both the case body and the fixed shaft. On the other hand, in a motor built-in roller using a motor unit, since there is a hollow area where no built-in object exists in a part of the axial direction in the roller body, the load B due to the gravity of the conveyed object is It is added only to the main body. Therefore, the motor built-in roller using the motor unit has a large amount of bending and a large amount of swinging of the fixed shaft.

In recent years, as described in Patent Document 7, an increasing number of conveyor devices have a structure in which a motor-incorporated roller is driven only when necessary. Repeat frequently. For this reason, the fixed shaft vibrates strongly on a daily basis, and the free-side connector comes off.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a motor built-in roller and a motor unit for the motor built-in roller having a structure in which the connector is not easily detached.

  According to a first aspect of the present invention for solving the above-described problem, the fixed shaft protrudes from the roller body, and a motor is built in the roller body. By rotating the motor, the roller body becomes the fixed shaft. In the motor built-in roller that rotates, at least one of the fixed shafts is hollow, a fixed connector piece is provided in the fixed shaft or at the fixed shaft end, and a separately prepared free connector piece is used as the fixed connector piece. By connecting, the inside and outside of the roller body can be electrically connected, and the fixed shaft or the fixed-side connector piece is provided with a shaft-side engaging portion that prevents the free-side connector piece from falling off. This is a roller with a built-in motor, wherein a part of the roller can be mechanically engaged with the shaft side engaging portion.

In the roller with a built-in motor of the present invention, a fixed-side connector piece is provided in the fixed shaft or at the fixed shaft end. Therefore, if even the fixed shaft of the motor built-in roller can be passed through the hole of the frame, the free side connector piece can be connected to the fixed side connector piece of the fixed shaft to supply power to the internal motor.
Further, the roller with a built-in motor according to the present invention is provided with a shaft side engaging portion for preventing the free side connector piece from falling off, and a part of the free side connector piece can be mechanically engaged with the shaft side engaging portion. Even if the fixed shaft vibrates, the free-side connector piece does not come off.

  The invention according to claim 2 includes a free-side connector piece, the fixed-side connector piece is provided in a fixed shaft, an axial-side engaging portion is formed on the inner surface of the fixed shaft, and an outer peripheral portion of the free-side connector piece The connector-side engagement portion is provided on the shaft, and the shaft-side engagement portion and the connector-side engagement portion are engaged to attach the free-side connector piece to the fixed shaft. This is a motor built-in roller.

In the motor built-in roller of the present invention, the shaft side engaging portion is formed on the inner surface of the fixed shaft. For example, an internal screw or a protrusion can be used for the shaft side engaging portion.
On the other hand, a connector side engaging portion is provided on the outer periphery of the free side connector piece. For example, an external screw or a claw can be employed for the connector-side engaging portion (claims 3 and 4).
In the motor built-in roller according to the present invention, the free-side connector piece can be attached to the fixed shaft by engaging the shaft-side engaging portion and the connector-side engaging portion. On the contrary, it will not come off.
Further, in the motor built-in roller of the present invention, a connector side engagement portion is provided on the outer periphery of the free side connector piece, and there is a shaft side engagement portion on the inner surface of the fixed shaft, and both are engaged. The outer shape of the free-side connector piece is small. Therefore, for example, the shaft end of the fixed shaft of the roller with a built-in motor can be accommodated inside the frame pieces, and the free side connector piece can be inserted into the hole of the frame from the outside of the frame to connect both connectors.

  The invention described in claim 5 is characterized in that the motor built in the roller body has a plurality of coils, and a part or all of a circuit for supplying current to the coils is built in the roller body. The motor built-in roller according to any one of claims 1 to 4.

The motor built-in roller of the present invention is a motor built-in roller having a structure called a substrate built-in type, and a part or all of a circuit for supplying a current to the coil is built in the roller body. For example, in the case of a brushless motor, a current is supplied to each coil in order to generate a rotating magnetic field and an alternating magnetic field therein. For example, when there are an A coil, a B coil, and a C coil inside, first, a current is supplied only to the A coil, then a current is supplied only to the B coil, then a current is supplied only to the C coil, and then A It is necessary to switch the energization circuit so that current flows only through the coil. In the motor built-in roller of the present invention, for example, this switching circuit is built in the roller body.
In the roller with a built-in motor according to the present invention, part or all of the circuit for supplying current to the coil is built in the roller body, so that the number of power lines and signal lines for conducting the inside and outside of the roller body is small. Therefore, the fixed shaft does not get crowded.

The invention according to claim 6 includes the roller body, a motor unit, a lid member, a roller inner shaft support member, and a body side short shaft member,
The motor unit includes a cylindrical case, a fixed short shaft projecting from one end of the case, a fixed shaft holder that holds the base end of the fixed short shaft at the end of the case, and a case A drive side shaft that protrudes from the other end of the motor, a motor stator and a rotor, the motor stator is fixed to the inner surface of the case, and the motor rotor is rotatable at the center of the stator The rotating force of the rotor is transmitted to the drive side shaft, the fixed short shaft is held by the fixed shaft holder and protrudes from one end side of the case, and the fixed connector piece is attached to the fixed short shaft. Provided,
The motor unit is in a roller body, and a protruding portion of the fixed side short shaft of the motor unit is rotatably supported by the roller body through a lid member, and the free end side of the fixed side short shaft is a roller body. Projecting from one end of the motor to constitute the fixed shaft of the motor built-in roller,
The driving side shaft of the motor unit is inside the roller body and is held on the central axis of the roller body by a roller inner shaft support member, and the driving side shaft is rotated with the roller body by the roller inner shaft support member. Connected together,
6. The motor built-in roller according to claim 1, wherein a main body side short shaft member is attached to the other end side of the roller main body so as to be rotatable with respect to the roller main body.

  The motor built-in roller of the present invention uses a motor unit.

  According to a seventh aspect of the present invention, there is provided a motor according to any one of the first to sixth aspects, wherein a hollow region where no built-in object exists is present in a partial region of the roller body in the axial direction. Built-in roller.

  The present invention is a structure of a motor built-in roller recommended when the total length is long.

  The invention according to claim 8 is a motor unit for a motor built-in roller constituting a motor built-in roller inserted into a roller body, and a cylindrical case, a fixed short shaft projecting from one end side of the case, A fixed shaft holder that securely holds the proximal end of the fixed short shaft at the end of the case, a drive side shaft that protrudes from the other end of the case, a motor stator and a rotor, A motor stator is fixed to the inner surface of the motor, and a rotor of the motor is rotatably held at the center of the stator. The rotational force of the rotor is transmitted to the drive side shaft, and the fixed side short shaft is fixed. A free-side connector prepared separately, which is held by a shaft holder and protrudes from one end of the case, the fixed short shaft is hollow, and a fixed connector piece is provided in the fixed short shaft or at the fixed short shaft end. One piece of the fixed connector piece By connecting, the inside and outside of the case can be electrically connected, and the fixed side short shaft or the fixed side connector piece is provided with a shaft side engaging portion for preventing the free side connector piece from falling off. A motor unit for a roller with a built-in motor, wherein a part of the piece is mechanically engageable with a shaft side engaging portion.

The present invention relates to a motor unit for a roller with a built-in motor, which can be inserted into a roller body having an arbitrary length and thickness, and completes a roller with a built-in motor having an arbitrary length and thickness. Can do.
In addition, the motor unit for a roller with a built-in motor according to the present invention is provided with a shaft-side engaging portion that prevents the free-side connector piece from falling off, and a part of the free-side connector piece can be mechanically engaged with the shaft-side engaging portion. Therefore, even if the fixed shaft vibrates, the free-side connector piece does not come off.

  The roller with a built-in motor according to the present invention has a power feeding part for feeding power to the internal motor on the fixed shaft, so that it is easy to take the power feeding part out of the area surrounded by the frame pieces. There is an effect that the work is easy. Moreover, the roller with a built-in motor of the present invention has an effect that the free-side connector is difficult to come off and there is little failure.

It is a front view of the roller with a built-in motor of the embodiment of the present invention. It is sectional drawing of the roller with a built-in motor of FIG. It is a disassembled perspective view of the roller with a built-in motor of FIG. It is sectional drawing of the motor unit incorporated in the roller with a built-in motor of FIG. It is a perspective view of the edge part of a motor built-in roller of FIG. 1, and a free side connector piece. It is sectional drawing of the edge part of the motor built-in roller of FIG. 1, and a free side connector piece, and both show the state which left | separated. It is sectional drawing of the edge part of the motor built-in roller of FIG. 1, and a free side connector piece, and shows the state in which both were joined. It is a disassembled perspective view of the edge part of the roller with a built-in motor of FIG. It is a circuit diagram of the roller with a built-in motor of FIG. It is a perspective view of the edge part of a motor built-in roller in other embodiment of this invention, and a free side connector piece. It is a perspective view of the edge part of a motor built-in roller and free side connector piece in other embodiment of this invention. It is sectional drawing and the one part enlarged view of the roller with a built-in motor in other embodiment of this invention. It is a front view of the free side connector piece employ | adopted by embodiment shown in FIG. It is a top view of the free side connector piece of FIG. It is a right view of the free side connector piece of FIG. It is front sectional drawing of the free side connector piece of FIG. It is a plane sectional view of the free side connector piece of FIG. It is a cross-sectional perspective view of the edge part of the motor built-in roller of embodiment shown in FIG. 12, and a perspective view of a free side connector piece. It is sectional drawing of the fixed axis | shaft of the roller with a built-in motor of embodiment shown in FIG. It is a perspective view of the fixed axis | shaft of the roller with a built-in motor of embodiment shown in FIG. It is a disassembled perspective view of the fixed axis | shaft of the roller with a built-in motor of embodiment shown in FIG. It is sectional drawing of the edge part of a motor built-in roller of FIG. 12, and a free side connector piece, and both show the state which left | separated. It is sectional drawing of the edge part of a motor built-in roller of FIG. 12, and a free side connector piece, and both show the state joined. It is sectional drawing of the roller with a built-in motor disclosed by patent document 1. FIG. It is sectional drawing of the roller with a built-in motor disclosed by patent document 4. It is explanatory drawing explaining the force applied to a motor built-in roller. It is explanatory drawing explaining the deformation | transformation state of a roller with a built-in motor when a to-be-conveyed object is mounted in the roller with a built-in motor.

Embodiments of the present invention will be further described below.
In the motor built-in roller 3 of the present embodiment, a fixed-side connector piece 25 is built in one fixed shaft 20, and by connecting a free-side connector piece 33 to the fixed-side connector piece 25, power feeding and signal line connection are performed. The basic structure of the motor built-in roller 3 will be described prior to these descriptions.

  FIG. 1 shows a motor built-in roller 3 according to an embodiment of the present invention. The motor built-in roller of this embodiment has a cylindrical roller main body 11 and a motor 12 and a speed reducer 13 are built in the same, as is well known. However, the motor built-in roller 3 of the present embodiment has a motor 12, a speed reducer 13, and a circuit board 15 as a unit. That is, the motor built-in roller 3 of the present embodiment is a roller body 11 in which a motor unit for motor with built-in roller (hereinafter simply referred to as a motor unit) 1 is built. As shown in FIG. 4, the motor unit 1 includes a motor 12, a speed reducer 13, and a circuit board 15 housed in a cylindrical case 2.

3 and 4, reference numeral 1 denotes a motor unit according to an embodiment of the present invention.
As shown in FIG. 4, the motor unit 1 of the present embodiment includes a case 2, a fixed short shaft 4 protruding from the case 2, a drive unit 5 and a circuit board 15 built in the case 2, and a drive unit 5. The driving side shaft 8 is rotated by receiving power and protrudes from the case 2.
That is, the motor unit 1 of the present embodiment is covered with the cylindrical case 2. A drive unit 5 is housed inside the case 2. The drive unit 5 is specifically a motor 12 and a speed reducer 13.

On the other hand, the drive side shaft 8 is exposed at one end of the case 2, and the fixed side short shaft 4 is exposed at the other end.
The drive side shaft 8 and the fixed side short shaft 4 described above are attached to the end of the case 2 by a drive side shaft holder 7 and a fixed shaft holder 10, respectively.

That is, the case 2 is a cylinder made of metal, and both ends are open. The drive side shaft holder 7 is formed of resin or the like. The drive-side shaft holder 7 has a substantially cylindrical shape, and has an outer diameter equal to the inner diameter of the case 2 and is integrally fitted into one end portion (left end in FIG. 4) of the case 2.
The drive side shaft holder 7 has a bearing 14 inside. The inner diameter of the bearing 14 of the drive side shaft holder 7 is equal to that of the drive side shaft 8 and is held so as not to prevent the output shaft 6 from rotating. That is, the output shaft 6 rotates relative to the case 2.

On the other hand, the fixed shaft holder 10 also has a substantially cylindrical shape and is fitted into the end of the case 2 (the right end in FIG. 4).
The fixed shaft holder 10 integrally fixes the fixed side short shaft 4 to the case 2, and the inner diameter thereof is equal to the inner diameter of the fixed side short shaft 4. That is, the fixed shaft holder 10 is an integral part of the fixed side short shaft 4 and the case 2 and does not have a bearing.

  The fixed short shaft 4 is an end of the motor unit 1 and is provided on the central shaft, and is fixed to the case 2 integrally by a fixed shaft holder 10. The fixed side short shaft 4 is hollow inside, and a fixed side connector piece 25 to be described later is incorporated in the inside.

  The drive unit 5 includes the motor 12 and the speed reducer 13 as described above. The motor 12 is a brushless motor including a stator 18 and a rotor 19. In the present embodiment, the stator 18 is integrally fixed to the inner surface of the case 2. A rotor 19 of the motor is rotatably held at the center of the stator 18. In the present embodiment, a rotor holding member 29 is integrally provided on the inner surface of the case 2, and the rotor 19 of the motor is rotatably held at the center of the stator 18 via the rotor holding member 29. .

In the present embodiment, a permanent magnet is used for the rotor 19. The stator 18 is a coil.
A Hall element or the like is used as the magnetic pole detection device.

The circuit board 15 has a built-in switching circuit and includes a part of a circuit that supplies current to the coil of the stator 18.
That is, the motor employed in this embodiment is a brushless motor, and the stator 18 has three coils W1, W2, and W3 as shown in the circuit diagram of FIG. Further, Hall elements H1, H2, and H3 for detecting the rotational position of the permanent magnet that is the rotor 19 are provided.
In order to generate a rotating magnetic field inside the coils W1, W2, and W3, a switching circuit that sequentially supplies current to the coils W1, W2, and W3 is provided. The switching circuit is housed in the circuit board 15. ing.

  The speed reducer 13 is located between the motor 12 and the drive side shaft 8 and is used to reduce the rotational speed of the motor 12 and transmit it to the output shaft 6.

The layout of each member in the case 2 is as shown in FIG. 4. The fixed short shaft 4 is fixed to one end of the case 2 by the fixed shaft holder 10, and the fixed short shaft 4 is at the end of the case 2. It is interrupted and does not enter the back of case 2.
A circuit board 15 is disposed behind the fixed shaft holder 10. Further, a motor 12 and a speed reducer 13 are provided in the back of the circuit board 15. The output shaft of the speed reducer 13 protrudes from the other end side of the case 2 as the drive side shaft 8.

The motor unit 1 has been described above. Next, the motor built-in roller 3 in which the motor unit 1 is incorporated will be described.
In addition to the motor unit 1 described above, the motor built-in roller 3 includes a roller body 11, a roller inner shaft support member 23, and lid members 16 and 17 (FIG. 3).

Here, the roller body 11 is a cylinder having both ends opened. The roller inner shaft support member 23 is integrally provided inside the roller main body 11 as shown in FIG. 3, and a hexagonal opening 34 is provided at the center.
One lid member 16 is formed by integrating a cylindrical roller body fitting member 52, two bearings 54, and a body-side short shaft member 53 as shown at the left end of FIG. The other lid member 17 has a structure as shown at the right end of FIG. 2, in which the roller body fitting member 55 and the bearing 22 are integrated.

In the motor built-in roller 3 of the present embodiment, the motor unit 1 is inserted into the roller body 11, and the drive side shaft 8 of the motor unit 1 is engaged with the opening 34 of the roller inner shaft support member 23. In the motor built-in roller 3 of the present embodiment, lid members 16 and 17 are attached to both ends of the roller body 11. Specifically, as shown in FIGS. 2 and 3, a cover member in which a roller body fitting member 55 and a bearing 22 are integrated on one end side of the roller body 11 (on the fixed short shaft 4 side of the motor unit 1). 17 is attached.
At this time, the stationary short shaft 4 of the motor unit 1 is inserted into the inner ring of the bearing 22, and the circular cross section of the base end portion of the stationary short shaft 4 is brought into contact with the inner ring of the bearing 22.
As a result, the free end side of the fixed short shaft 4 protrudes from the roller body 11. In the present embodiment, the distal end side of the fixed short shaft 4 protruding from the roller body 11 constitutes one fixed shaft 20 of the motor built-in roller 3 itself.

On the other hand, on the other end side of the roller body 11, the roller body fitting member 52, the lid member 16 in which the bearing 54 and the body-side short shaft member 53 are integrated are attached.
In the present embodiment, the main body side short shaft member 53 of the lid member 16 constitutes the other fixed shaft 21 of the motor built-in roller 3 itself.

When overviewing the motor built-in roller 3 of the present embodiment, the fixed shafts 20 and 21 do not penetrate the roller body 11 in the motor built-in roller 3 of the present embodiment. That is, in the motor built-in roller 3, the fixed shafts 20 and 21 at both ends are short in length and are only provided at both ends of the roller body 11. More specifically, one fixed shaft 20 supports only one end of the roller body 11 and one end of the case 2 of the motor unit 1. The other fixed shaft 21 supports only the other end of the roller body 11.
In the present embodiment, the fixed shaft 20 only supports the end of the case 2 of the motor unit 1, and the motor 12 and the speed reducer 13 are held by the case 2.

  Further, in the motor built-in roller 3 of the present embodiment, a hollow region 44 where no built-in material exists is present in a partial region in the axial direction in the roller body 11.

  Returning to the overall description of the motor built-in roller 3, the motor built-in roller 3 employed in this embodiment has the fixed shafts 20 and 21 protruding from both ends of the roller body 11 as described above. More specifically, in the motor built-in roller 3, lid members 16 and 17 are attached to both ends of the roller body 11, and fixed shafts 21 and 20 protrude from the lid members 16 and 17. A bearing 22 is interposed between the fixed shafts 20 and 21 and the roller body 11, and the roller body 11 rotates relative to the fixed shafts 20 and 21. One fixed shaft 20 is chamfered on one surface and has a “D” cross-sectional shape.

In the motor built-in roller 3, as shown in FIGS. 5, 6, and 7, the fixed shaft (fixed-side short shaft) 20 on the motor unit 1 side has a hollow shape, and the fixed-side connector piece 25 is incorporated therein. .
The fixed connector piece 25 is a female connector having five holes as shown in the figure, and the outer shape is a cylindrical shape having a flange 26 at the center.
On the other hand, the fixed shaft 20 has a hole 28 communicating in the axial direction and is hollow inside. The inner diameter of the fixed shaft 20 is large on the protruding side and small on the roller body 11 side. That is, a stepped portion 27 is formed inside the fixed shaft 20.
Further, an inner screw (shaft side engaging portion) 24 is formed on the inner surface of the fixed shaft 20 on the protruding side (large diameter side).

The fixed connector piece 25 is inserted into the hole 28 in the fixed shaft 20 together with the sleeve 30. That is, the sleeve 30 is attached to the outer periphery of the rear end side (the side without the pin hole) of the fixed connector piece 25 and is inserted into the hole 28 in the fixed shaft 20 with the pin hole side facing outward. In the hole 28 of the fixed shaft 20, one end surface of the sleeve 30 is in contact with the stepped portion 27 of the hole 28, and the flange 26 of the fixed connector piece 25 is in contact with the other end surface of the sleeve 30. Therefore, the flange 26 of the fixed connector piece 25 is in contact with the stepped portion 27 of the hole 28 via the sleeve 30 and is positioned in the axial direction.
Further, an adhesive (not shown) is filled between the fixed connector piece 25, the hole 28 in the fixed shaft 20, and the sleeve 30, so that the fixed connector piece 25 is not detached outside.

  Inside the roller body 11, a lead wire 31 extending from the rear end of the fixed connector piece 25 is connected to the circuit board 15, and power is supplied from the circuit board 15 to the motor 12. In the present embodiment, since the motor built-in roller 3 is a substrate built-in type, the number of lead wires is five. However, when the present invention is applied to a motor built-in roller having a structure not incorporating the circuit board 15. The number of lead wires is required more, and the number of pin holes in the fixed-side connector piece 25 needs to be increased accordingly.

In the motor built-in roller 3 of this embodiment, the free-side connector piece 33 is connected to the fixed-side connector piece 25 described above.
The free side connector piece 33 is a 5-pin male side connector.
As shown in FIGS. 5 and 6, the free-side connector piece 33 includes a connector main body 35 and a screw ring 36.
The screw ring 36 is provided on the outer peripheral portion of the connector main body 35 and is rotatable with respect to the connector main body 35, but moves integrally in the axial direction.
The screw ring 36 includes a screw forming portion 37 and a knob portion 38, and the knob portion 38 has a diameter larger than that of the screw forming portion 37.
An outer screw (connector side engaging portion) is formed on the outer periphery of the screw forming portion 37. The outer diameter of the knob 38 is equal to the outer diameter of the fixed shaft 20, and the outer peripheral surface is knurled.

In the motor built-in roller 3 of this embodiment, the free-side connector piece 33 and the fixed-side connector piece 25 can be connected by inserting the connector main body 35 of the free-side connector piece 33 into the hole 28 of the fixed shaft 20. .
When the screw ring 36 is rotated with the connector main body 35 of the free-side connector piece 33 inserted into the hole 28 of the fixed shaft 20, an external screw (male screw) provided on the screw ring 36 is inserted into the hole 28 of the fixed shaft 20. It engages with an internal screw 24 provided on the. Here, the screw ring 36 is rotatable with respect to the connector main body 35, but moves integrally in the axial direction, so that the external screw (male screw) of the screw ring 36 is engaged with the internal screw 24 of the fixed shaft 20. When the screw ring 36 is rotated in this state, the free-side connector piece 33 moves to the hole 28 side of the fixed shaft 20. Further, since the free-side connector piece 33 is screw-engaged with the fixed shaft 20, the free-side connector piece 33 will not be detached from the fixed shaft 20.

In the present embodiment, the fixed connector piece 25 is housed in the hole 28 of the fixed shaft 20 as shown in FIG. 5, but the fixed connector piece 25 may be provided on the end surface of the fixed shaft 20.
10 and 11 are perspective views of an end portion of a motor built-in roller and a free-side connector piece according to another embodiment of the present invention.
In the motor built-in roller shown in FIG. 10, the surface of the main body portion of the fixed shaft 20 and the fixed-side connector piece 25 are on the same surface. In the motor built-in roller shown in FIG. 11, the fixed-side connector piece 25 protrudes from the surface of the main body portion of the fixed shaft 20.

The free-side connector piece 33 of the above-described embodiment is engaged with the fixed shaft 20 by a screw, but other engaging means can be employed.
Hereinafter, the structure which engages the free side connector piece 62 with a nail | claw is demonstrated.
The motor built-in roller 60 shown in FIG. 12 is the same as the previous embodiment except for the structure inside the fixed shaft 61 and the free-side connector piece 62. Therefore, the same number is attached | subjected to the same member and the overlapping description is abbreviate | omitted.

In the motor built-in roller 60 of the present embodiment, as shown in FIG. 20, the fixed shaft 61 has a hexagonal outer shape, is hollow inside, and has a fixed connector piece 75 built-in.
The fixed connector piece 75 is a female connector having five holes as shown in FIG. The shape of the fixed-side connector piece 75 differs between the front end portion side 76 and the rear end portion side 77. That is, the tip end side 76 is provided with the five holes described above on the end face. The tip end side 76 is generally cylindrical, but two sides are chamfered.
The rear end side 77 of the fixed connector piece 75 is cylindrical. On the peripheral surface of the fixed-side connector piece 75, two connector-side contact projections 78 are provided between the front end portion side 76 and the rear end portion side 77 at positions facing each other.

On the other hand, the fixed shaft 61 has a hexagonal outer shape, has a hole 86 communicating in the axial direction, and is hollow inside.
An annular groove 63 is provided inside the fixed shaft 61 and in the vicinity of the opening end as shown in FIG. Therefore, a step portion is provided inside the fixed shaft 61, and a projection (shaft side engaging portion) 67 is formed on the inner surface of the open end.
A slit 81 extending in the axial direction is provided at the opening end of the fixed shaft 61 as shown in FIGS.

  The fixed connector piece 75 is inserted into the hole 86 in the fixed shaft 61 together with the sleeve 82. The sleeve 82 has a tube portion 83 as shown in FIG. 21, and is provided with a sleeve side abutting projection 85 on the side surface of the tube portion 83 and at the end in the length direction.

  The fixed connector piece 75 is fitted with a sleeve 82 on the outer periphery on the rear end side (the side without the pin hole), and is inserted into the hole 86 in the fixed shaft 61 with the pin hole side facing outward. In the hole 86 of the fixed shaft 61, the sleeve side contact protrusion 85 of the sleeve 82 enters the slit 81 of the hole 86, the sleeve side contact protrusion 85 contacts the back end of the slit 81, and the sleeve 82 is fixed to the fixed shaft 61. It is positioned in the inner hole 86.

  Further, the connector-side contact protrusion 78 of the fixed-side connector piece 75 is in contact with the end surface of the sleeve 82, and the fixed-side connector piece 75 is positioned in the hole 86 in the fixed shaft 61.

On the other hand, the free-side connector piece 62 has a substantially “L” -shaped main body 65 as shown in the figure, and a connecting portion 80 is provided on the side of the main body. Further, the cord 68 extends in a direction of 90 degrees with respect to the connecting portion 80.
The connection part 80 is a base block part 66 with five pins protruding therefrom. A cylindrical engagement cylinder 69 is provided around the base block portion 66. The front end of the engagement cylinder 69 protrudes forward from the base block portion 66.

  A groove 64 is provided on the side surface of the main body, and an engagement piece 70 is attached to the groove 64. The engaging piece 70 is made of an elastic material such as spring steel, and has a substantially “U” shape in plan view. That is, the engagement piece 70 has a shape formed by folding back one band-shaped member, and has a shape in which a pair of parallel pieces 71 are joined at an intermediate portion and the other end side of the parallel pieces 71 is opened as a free end. is doing. Therefore, each parallel piece 71 is cantilevered, and both free end sides bend. That is, it can bend in the direction in which the interval between the parallel pieces 71 increases or decreases.

The tip of each parallel piece 71 is slightly tapered. A claw 72 is provided in the vicinity of the tip of each parallel piece 71 toward the outside.
As described above, each parallel piece 71 is cantilevered and the free ends of both can be bent, so that the above-described claw 72 has a degree of freedom in the spreading direction and the adjacent direction.

Also in the motor built-in roller 60 of the present embodiment, the free-side connector piece 62 is connected to the fixed-side connector piece 75.
That is, the connecting portion of the free connector piece 62 is inserted into the hole 86 of the fixed shaft 61. As a result, the pin of the free connector piece 62 is inserted into the pin socket of the fixed connector piece 75 in the fixed shaft 61. Further, the engagement cylinder 69 of the free connector piece 62 is engaged with the outer peripheral portion of the fixed connector piece 75.
Further, the claw 72 provided on the engagement piece 70 of the free-side connector piece 62 enters the fixed shaft 61, and the claw 72 engages with the protrusion 67 provided on the inner side of the fixed shaft 61.

That is, when the free-side connector piece 62 is brought into contact with the fixed shaft 61 and the free-side connector piece 62 is pressed against the fixed shaft 61, the parallel piece 71 of the engagement piece 70 is bent and the interval between the claws 72 is reduced. It enters into the hole 86 of the fixed shaft 61. Since the groove 63 is provided in the hole 86 of the fixed shaft 61 and the diameter thereof is increased, the parallel piece 71 expands due to its elasticity, and the claw 72 engages with the protrusion 67.
Therefore, the free-side connector piece 62 is engaged with the fixed shaft 61 by the claw 72, and the free-side connector piece 62 is not detached from the fixed shaft 61.

  In the embodiment described above, the claw 72 of the free-side connector piece 62 is engaged with the inside of the fixed shaft 61. However, the present invention is not limited to this structure, and is engaged with the outside of the fixed shaft. May be.

  The present invention can also be applied to a motor built-in roller having a structure without a motor unit.

3 Motor built-in roller 11 Roller body 12 Motor 15 Circuit board 20, 21 Fixed shaft 24 Inner screw (shaft side engaging portion)
25 Fixed-side connector piece 30 Sleeve 33 Free-side connector piece 35 Connector body 36 Screw ring 37 Screw forming portion (connector-side engaging portion)
53 Main body side short shaft member 60 Motor built-in roller 61 Fixed shaft 62 Free side connector piece 64 Groove 66 Foundation block portion 67 Protrusion (shaft side engaging portion)
69 Engagement cylinder 70 Engagement piece 71 Parallel piece 72 Claw 75 Fixed side connector piece 78 Connector side contact protrusion 81 Slit 82 Sleeve 85 Sleeve side contact protrusion W1, W2, W3 Coil

Claims (8)

  A fixed shaft protrudes from the roller body, and a motor is built in the roller body, and the roller body rotates with respect to the fixed shaft by rotating the motor. At least one of the fixed shafts is hollow. Yes, a fixed connector piece is provided in the fixed shaft or at the fixed shaft end, and a separately provided free connector piece can be electrically connected to the inside and outside of the roller body by connecting to the fixed connector piece; The fixed shaft or the fixed-side connector piece is provided with a shaft-side engaging portion that prevents the free-side connector piece from falling off, and a part of the free-side connector piece can be mechanically engaged with the shaft-side engaging portion. A roller with a built-in motor.   Including a free-side connector piece, the fixed-side connector piece is provided in a fixed shaft, a shaft-side engaging portion is formed on the inner surface of the fixed shaft, and a connector-side engaging portion is provided on the outer peripheral portion of the free-side connector piece The motor built-in roller according to claim 1, wherein the shaft-side engaging portion and the connector-side engaging portion are engaged to attach the free-side connector piece to the fixed shaft.   The roller with a built-in motor according to claim 1, wherein the connector side engaging portion is a claw having elasticity, and the shaft side engaging portion is a protrusion that engages with the claw.   4. The motor built-in roller according to claim 1, wherein the connector side engaging portion is a male screw, and the shaft side engaging portion is a female screw.   The motor built in the roller body has a plurality of coils, and a part or all of a circuit for supplying current to the coils is built in the roller body. The motor built-in roller as described in 1. The roller main body, a motor unit, a lid member, a roller inner shaft support member, and a main body side short shaft member,
The motor unit includes a cylindrical case, a fixed short shaft projecting from one end of the case, a fixed shaft holder that holds the base end of the fixed short shaft at the end of the case, and a case A drive side shaft that protrudes from the other end of the motor, a motor stator and a rotor, the motor stator is fixed to the inner surface of the case, and the motor rotor is rotatable at the center of the stator The rotating force of the rotor is transmitted to the drive side shaft, the fixed short shaft is held by the fixed shaft holder and protrudes from one end side of the case, and the fixed connector piece is attached to the fixed short shaft. Provided,
The motor unit is in a roller body, and a protruding portion of the fixed side short shaft of the motor unit is rotatably supported by the roller body through a lid member, and the free end side of the fixed side short shaft is a roller body. Projecting from one end of the motor to constitute the fixed shaft of the motor built-in roller,
The driving side shaft of the motor unit is inside the roller body and is held on the central axis of the roller body by a roller inner shaft support member, and the driving side shaft is rotated with the roller body by the roller inner shaft support member. Connected together,
6. The motor built-in roller according to claim 1, wherein a main body side short shaft member is attached to the other end side of the roller main body so as to be rotatable with respect to the roller main body.   The motor built-in roller according to claim 1, wherein a hollow region where no built-in object exists is present in a partial region in the axial direction in the roller body.   In a motor unit for a motor built-in roller constituting a motor built-in roller inserted into a roller body, a cylindrical case, a fixed short shaft protruding from one end side of the case, and a base end portion of the fixed short shaft A fixed shaft holder that is fixedly held at the end of the case, a drive side shaft that protrudes from the other end of the case, a motor stator and a rotor, and the motor stator is fixed to the inner surface of the case Further, the rotor of the motor is rotatably held at the center of the stator, the rotational force of the rotor is transmitted to the drive side shaft, and the fixed side short shaft is held by the fixed shaft holder and is connected to one end of the case. The fixed side short shaft is hollow, the fixed side short shaft is hollow, a fixed side connector piece is provided in the fixed side short shaft or the fixed side short shaft end, and a separately prepared free side connector piece is connected to the fixed side connector piece By The fixed side short shaft or the fixed side connector piece is provided with a shaft side engaging portion for preventing the free side connector piece from falling off, and a part of the free side connector piece is A motor unit for a roller with a built-in motor, which is mechanically engageable with a shaft-side engaging portion.

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