JP2015214379A - Roller with built-in motor, power transmission member, and manufacturing method of roller with built-in motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission member and a roller with built-in motor which can be securely fixed to a roller body even if the roller body has manufacturing variations.SOLUTION: A roller 1 with built-in motor has a built-in power transmission member 2 which transmits torque of a power unit to a roller body 11. The power transmission member 2 is constituted of an elastic ring 5 and an engaging member 6, in which the engaging member 6 is installed to the elastic ring 5. An outer diameter A of the elastic ring 5 in a natural state is smaller than an inner diameter B of the roller body 11. A circumscribed circle C of the opening 7 of the elastic ring 5 is smaller than a circumscribed circle D of the engaging member 6. When the engaging member 6 is inserted into the opening 7, the outer diameter of the elastic ring 5 is expanded and swollen, and the outer diameter A of the elastic ring 5 becomes larger than the inner diameter B of the roller body 11.

Description

  The present invention relates to a motor built-in roller provided with a power transmission member. The present invention also relates to one of the components constituting the motor built-in roller, and to a power transmission member that transmits the power of the motor to the roller. The present invention also relates to a method for manufacturing a roller with a built-in motor.

  A motor built-in roller is known as a component of a roller conveyor device. In the motor built-in roller, a motor and a speed reducer are built in a roller body, and an outer roller body is rotated by driving an internal motor. More specifically, the motor built-in roller is provided with a power transmission member that transmits the power of the motor to the roller body, and the rotational force of the motor is transmitted to the roller body through the power transmission member. ing.

  By the way, various types of power transmission members for transmitting power to the roller body have been known. A power transmission member having a structure in which the power transmission member is integrally fixed to the inner wall of the roller main body is often used from the viewpoint of power transmission efficiency, ease of processing of parts, and the like (for example, Patent Document 1). Conventionally, as a method for fixing the power transmission member to the roller body, the following method has been generalized.

  That is, as a power transmission member, a press-fitting type that press-fits and fixes the power transmission member to the roller body is known. In addition, there is an other member intervention fixed type in which the power transmission member is disposed in the roller body and fixed through a pin or the like. Further, there is a caulking fixing type in which a power transmission member is arranged in the roller body and a part of the roller body is caulked and fixed inside. Furthermore, there is a composite fixing type that combines any one of the press-fit fixing type, the other member intervention fixing type, and the caulking fixing type.

JP 2002-145438 A US Pat. No. 7,207,433 US Pat. No. 8,381,901

Among the methods described above, the press-fitted and fixed power transmission member has a simple structure and is easy to assemble.
However, the press-fitted and fixed power transmission member has a problem in that the power transmission member cannot be fixed to the roller body due to variations in manufacturing of the roller body, particularly the inner diameter of the roller body, or the power transmission capacity to the roller body is insufficient. May be.
That is, when the inner diameter of the roller body is somewhat large, the contact force between the roller body and the power transmission member becomes insufficient, and the power transmission member is idled in the roller body.
On the other hand, when the inner diameter of the roller body is somewhat small, the power transmission member cannot be press-fitted into the roller body. In particular, when the inner diameter of the roller main body is somewhat small, it is difficult for the handle portion to enter, and the power transmission member is damaged when it is forced into the roller body.

  Accordingly, in view of the problems of the prior art, the present invention provides a power that can be securely fixed to the roller body even if there are variations in the production of the roller body, and that can increase the efficiency of work during the manufacturing. An object is to provide a transmission member and a roller with a built-in motor. It is another object of the present invention to provide a preferable method for manufacturing a motor built-in roller.

  An aspect provided to solve the above problems includes a hollow roller body, a power unit including a motor, and a power transmission member. The power unit and the power transmission member are incorporated in the roller body, and the power unit rotates. In the motor built-in roller in which the force is transmitted to the roller body through the power transmission member, the power transmission member has an elastic ring and an engagement member, and the elastic ring can be expanded and contracted and has an opening at the center. The opening has a ring-side engaging portion, and the diameter of the circumscribed circle of the elastic ring approximated to a natural state or a circle is smaller than the inner diameter of the roller body, and the engaging member is an outer engaging portion. And the inner engagement portion, and the engagement member is attached to the opening of the elastic ring, the outer engagement portion is engaged with the ring-side engagement portion, and the elastic ring in a state where the engagement member is attached The circumscribed circle diameter of the roller body A roller with a built-in motor, wherein the power portion engages with the inner engagement portion of the engagement member inside the roller main body, and the outer peripheral surface of the elastic ring is in contact with the inner peripheral surface of the roller main body. It is.

The power transmission member employed in this aspect includes an elastic ring and an engagement member. The diameter of the circumscribed circle in the natural state of the elastic ring or the state approximated to a circle is smaller than the inner diameter of the roller body. Here, “a state approximated to a circle” is, for example, a case where the elastic ring is soft and the regularity cannot be maintained in a natural state, or an elliptical shape or the like in a natural state but is inserted into a roller body. It is assumed to be applied to objects that conform to the inner shape of the main body. When such an object is employed as an elastic ring, the shape when inserted into the roller body is assumed, and the diameter of the circumscribed circle is compared with the inner diameter of the roller body.
In any case, the circumscribed circle of the elastic ring is smaller than the inner diameter of the roller body, and can be easily inserted into the roller body when the elastic ring is in a natural state or the like.
Then, with the part or all of the elastic ring inserted into the roller body, the engaging member is attached to the opening of the elastic ring. As a result, the elastic ring expands in diameter and comes into close contact with the roller body.
And a power transmission member is moved to the predetermined position of a roller main body as needed. Further, the power portion is engaged with the inner engagement portion of the engagement member.
When the motor of the power unit rotates, the rotational force is transmitted to the engaging member, and the engaging member rotates. Further, since the outer engagement portion of the engagement member is engaged with the ring side engagement portion, the elastic ring rotates together with the engagement member. Further, the elastic ring is in contact with the inner peripheral surface of the roller body, and the rotation of the elastic ring is transmitted to the roller body.
According to this aspect, even if there is a manufacturing variation in the size of the roller body, the power transmission member can be easily and reliably attached.

  Another aspect includes a hollow roller body, a power unit including a motor, and a power transmission member. The power unit and the power transmission member are built in the roller body, and the rotational force of the power unit is a power transmission member. In the motor built-in roller that is transmitted to the roller body via the power transmission member, the power transmission member has an elastic ring and an engagement member, and the elastic ring can be expanded and contracted, and has an opening in the center. Has a ring-side engaging portion, and the diameter of the circumscribed circle of the elastic ring is large enough to be easily inserted into the roller body, and the engaging member has an outer engaging portion and an inner engaging portion. The engagement member is attached to the opening of the elastic ring, the outer engagement portion is engaged with the ring-side engagement portion, and the diameter of the circumscribed circle of the elastic ring in the state where the engagement member is attached is The inner diameter of the roller body is larger than the inner diameter of the roller body. Power unit is engaged with the inner engaging portion of the engaging member is a motorized roller, wherein the outer peripheral surface of the elastic ring is in contact with the inner peripheral surface of the roller body in.

In the motor built-in roller of this aspect, the diameter of the circumscribed circle of the elastic ring is large enough to be easily inserted into the roller body. Here, “easy to insert” means “can be inserted” without using a hydraulic device or a pneumatic device.
If the diameter of the circumscribed circle of the elastic ring is smaller than the inner diameter of the roller body, it is clearly “easy to insert”. Also, if the diameter of the circumscribed circle is the same as the inner diameter of the roller body, or if the elastic ring is soft even if the diameter of the circumscribed circle is slightly larger than the inner diameter of the roller body, it can be said that it can be easily inserted. There is a case.

  An aspect relating to a method for manufacturing a motor built-in roller is the above-described method for manufacturing a motor built-in roller, wherein a part or all of an elastic ring approximated to a natural state or a circle is inserted into the roller body, and in this state the elastic ring A method for manufacturing a roller with a built-in motor, comprising the step of assembling a power transmission member by inserting an engaging member into the opening.

In the present invention, the elastic ring is inserted into the roller body in a natural state or a state approximated to a circle, but the degree of insertion may be the whole or a part of the elastic ring.
When the entire elastic ring is inserted into the roller body in advance, the step of moving the power transmission member after assembling the power transmission member can be omitted. On the other hand, there is a drawback that it is difficult to insert the engaging member into the opening of the elastic ring.
When only a part of the elastic ring is inserted into the roller body, it is necessary to move the power transmission member after assembling the power transmission member. On the other hand, there is an advantage that the engaging member can be easily inserted into the opening of the elastic ring.
In addition, since a part of the elastic ring can be inserted into the roller body, power can be transmitted within the roller body even when the engagement member is inserted into the opening and the diameter of the elastic ring is expanded. The member can be moved.
When the power transmission member is assembled by inserting the entire elastic ring into the roller body, the position of the elastic ring may be the position (final position) of the elastic ring in the motor built-in roller. Conversely, the position of the elastic ring does not have to be the final position. For example, it may be near the opening of the roller body or near the final position.

  The manufacturing method of the motor built-in roller may include a step of applying an external force in the axial direction to the assembled power transmission member and moving it in the axial direction within the roller body.

  When the power transmission member is moved in the axial direction, it is desirable to measure the force required for the movement.

  According to the present invention, the joining force between the power transmission member and the roller body can be inspected.

  An aspect relating to the power transmission member is a power transmission member built in the hollow roller body of the motor built-in roller, and the power transmission member is output from the output shaft of the power unit including the motor disposed in the roller body. The rotating force is transmitted to the roller body, and has an elastic ring and an engaging member. The elastic ring is expandable / contractable and has an opening in the central portion. The diameter of the circumscribed circle of the elastic ring in a natural state or approximated to a circular shape is smaller than the inner diameter of the roller body, and the engaging member has an outer engaging portion and an inner engaging portion. The engagement member is attached to the opening of the elastic ring, the outer engagement portion engages with the ring-side engagement portion, and the diameter of the circumscribed circle of the elastic ring when the engagement member is attached is the roller Larger than the inner diameter of the body, Power unit is engaged with the inner engaging portion of the engaging member in the main body, a power transmission member outer peripheral surface of the elastic ring, characterized in that the contact with the inner peripheral surface of the roller body.

  The power transmission member of this aspect can reliably press the elastic ring against the inner peripheral surface of the roller body even if there is a difference in the size of the roller body due to manufacturing variations.

  The roller with a built-in motor of the present invention can reliably and easily attach the power transmission member to the roller body even if the size of the roller body varies in manufacturing. Further, in the present invention, since part or all of the elastic ring is disposed in the roller body, the elastic ring can be expanded to press the elastic ring against the inner peripheral surface of the roller body. It is possible to dramatically improve work efficiency in manufacturing.

It is a front view which shows the motor built-in roller which concerns on embodiment of this 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 a power transmission member. It is a disassembled perspective view of a power transmission member. (A) (b) is sectional drawing which shows the relationship of the magnitude | size of a power transmission member and a roller main body. (A) thru | or (d) is one of the embodiment of this invention, and is sectional drawing explaining the process of installing a power transmission member in a roller main body. It is explanatory drawing which illustrates notionally the relationship between the motor unit in a roller main body, and a power transmission member. (A) thru | or (c) is sectional drawing explaining in detail the procedure which installs a power transmission member in a roller main body. (A) thru | or (c) is sectional drawing explaining in detail the procedure which installs a power transmission member in a roller main body, and shows the procedure following FIG. (A) thru | or (d) is other embodiment of this invention, and is sectional drawing explaining the process of installing a power transmission member in a roller main body. (A) thru | or (d) is other embodiment of this invention, and is sectional drawing explaining the process of installing a power transmission member in a roller main body. (A) thru | or (d) is other embodiment of this invention, and is sectional drawing explaining the process of installing a power transmission member in a roller main body. It is a front view of the modification of an engaging member. It is a front view of the other modification of an engaging member. It is a front view of the other modification of an engaging member. It is a front view of the modification of an elastic ring. It is a front view of the other modification of an elastic ring.

The motor built-in roller according to the embodiment of the present invention will be described below.
The roller 1 with a built-in motor according to this embodiment is characterized by a power transmission member 2 that transmits the driving force of the motor 12 to the roller body 11, and other basic structures are the same as those conventionally known. First, the basic structure of the motor built-in roller 1 will be briefly described.

  As shown in FIGS. 1 to 3, the basic structure of the motor built-in roller 1 has a cylindrical and hollow roller body 11 and lid members 41 and 42, and includes a motor 12 and a speed reducer 13 therein. The power unit 22 is built in. However, in this embodiment, the motor 12, the speed reducer 13, and the circuit board 43 are unitized to form a set of motor units 3, and the motor unit 3 is built in the roller body 11. . In the present embodiment, a part of the motor unit 3 constitutes the power unit 22.

The roller body 11 is a cylinder having both ends opened. Lid members 41 and 42 are attached so as to close both ends of the roller body 11.
As shown in FIG. 2, the cover member 41 on the one side (left side in FIG. 2) is formed by integrating a cylindrical roller body fitting member 52, a bearing 54, and a body side shaft member 53. The other (right side in FIG. 2) lid member 42 is obtained by integrating a roller body fitting member 55 and a bearing 56. In addition, the main body side shaft member 53 is not partially or entirely circular in cross section. In this embodiment, the cross-sectional shape is substantially hexagonal.

  As shown in FIGS. 2 to 4, the motor unit 3 includes a cylindrical case 44, and the motor 12, the speed reducer 13, and the circuit board 43 are built therein. Further, the case 44 has a fixed side shaft 45 projecting outward from one end in the axial direction and a drive side shaft (output shaft) 46 projecting outward from the other end in the axial direction. Is provided.

The fixed side shaft 45 is a shaft that is inserted into the bearing 56 of the other lid member 42 in a state where the motor unit 3 is disposed in the roller main body 11, and functions as one main body side shaft member of the roller main body 11. It is.
The drive side shaft 46 is a shaft connected to a power transmission member 2 described later in a state where the motor unit 3 is disposed in the roller body 11, and is a rotation shaft that outputs the power of the power unit 22 to the roller body 11. .
Note that the fixed side shaft 45 and the drive side shaft 46 both have a substantially hexagonal cross-sectional shape.

Next, the power transmission member 2 which is a characteristic configuration of the present invention will be described.
The power transmission member 2 of the present embodiment is a member that is disposed in the roller main body 11 in the motor built-in roller 1 and transmits the power of the motor 12 to the roller main body 11. And in order to fulfill | perform the function, the power transmission member 2 is comprised by the elastic ring 5 and the engaging member 6, as shown to FIG.

The elastic ring 5 is a short cylindrical body formed of a member having elasticity such as rubber. As shown in FIG. 6, the elastic ring 5 has an annular shape when viewed from the front. That is, the elastic ring 5 is provided with an opening 7 in the center. The shape of the opening 7 is a star shape as shown in FIG. In the present embodiment, the opening 7 has a plurality of projections and depressions, and the ring-side engagement portion 8 is formed.
The elastic ring 5 can be expanded in diameter by applying an external force. When the external force is removed, the diameter is reduced.

The engaging member 6 is made of a metal such as steel, zinc, or aluminum. The cross-sectional shape of the engaging member 6 is similar to the opening 7 of the elastic ring 5 described above. When the sizes are compared, the engaging member 6 is larger than the opening 7 of the elastic ring 5.
More specifically, the engaging member 6 has a star shape in cross section. That is, the outer shape of the engaging member 6 has a plurality of irregularities and constitutes the outer engaging portion 15. A large chamfered and inclined surface 27 is formed on the outer edge of the engaging member 6.
The engagement member 6 is provided with a through hole 16 at the center. The cross-sectional shape of the through hole 16 is a hexagon, and the inner engagement portion 17 is configured by the hexagonal shape.

  The power transmission member 2 is formed by mounting an engagement member 6 on an elastic ring 5 as shown in FIG. That is, in the power transmission member 2, the engaging member 6 is attached to the opening 7 of the elastic ring 5, and the outer engaging portion 15 of the engaging member 6 is physically engaged with the ring-side engaging portion 8 of the elastic ring 5. Match.

Next, the relationship between the size of each part of the power transmission member 2 and the inner diameter B of the roller body 11 will be described with reference to FIG.
As shown in FIG. 7A, the diameter A of the circumscribed circle of the elastic ring 5 of the power transmission member 2 in the natural state is smaller than the inner diameter B of the roller body 11. Since the cross-sectional shape of the elastic ring 5 is circular, the diameter A of the circumscribed circle of the elastic ring 5 is the outer diameter A of the elastic ring 5 itself.
In other words, in the state where no external force is applied, the outer diameter A of the elastic ring 5 is smaller than the inner diameter B of the roller body 11.
Since the engaging member 6 is larger than the opening 7 of the elastic ring 5 as described above, the circumscribed circle C of the opening 7 of the elastic ring 5 is smaller than the circumscribed circle D of the engaging member 6.

  The outer diameter A of the elastic ring 5 in a state where the engaging member 6 is attached to the elastic ring 5 is larger than the inner diameter B of the roller body 11. That is, since the circumscribed circle C of the opening 7 of the elastic ring 5 is smaller than the circumscribed circle D of the engaging member 6, when the engaging member 6 is inserted into the opening 7, the outer diameter A of the elastic ring 5 is expanded. Swell. As a result, the outer diameter A of the elastic ring 5 is larger than the inner diameter B of the roller body 11.

The power transmission member 2 is installed at a predetermined position in the roller body 11 through the process shown in FIG. That is, as a first step, the elastic ring 5 in a natural state is inserted into the roller body 11 and the elastic ring 5 is placed at a predetermined position (FIG. 8b). In the embodiment shown in FIG. 8, the elastic ring 5 is placed at a position where the elastic ring 5 is to be placed in the state where the roller with built-in motor 1 is completed. That is, in the embodiment shown in FIG. 8, the elastic ring 5 is placed in the final position.
As described above, since the outer diameter A of the elastic ring 5 in the natural state is smaller than the inner diameter B of the roller body 11, the elastic ring 5 is inserted into the roller body 11 without any resistance. It can be placed in place. That is, the elastic ring 5 can be easily inserted into the roller body 11.

Subsequently, as shown in FIG. 8C, the engaging member 6 is pushed into the elastic ring 5 installed in the roller body 11. As a result, the diameter of the elastic ring 5 is expanded, and the outer peripheral portion of the elastic ring 5 is in close contact with the inner surface of the roller body 11 as shown in FIG. 8D, and the roller body 11 is pressed by the repulsive force of the elastic ring 5.
As a result, the power transmission member 2 is substantially integrated with the roller body 11.
Thereafter, as shown in FIG. 9, the motor unit 3 is inserted into the roller body 11, the driving side shaft (output shaft) 46 is inserted into the through hole 16 of the engaging member 6, and the hexagonal driving side shaft 46 is The inner engagement portion 17 of the engagement member 6 is engaged.

The procedure for installing the power transmission member 2 on the roller body 11 will be described in more detail as follows.
That is, as shown in FIG. 10A, a cylindrical holding jig 23 is inserted into the roller body 11. In this state, the natural elastic ring 5 is inserted into the roller body 11 as shown in FIG.
Subsequently, the engaging member 6 is pulled into the opening 7 of the elastic ring 5 from the opposite side of the pressing jig 23 using a rod-shaped pulling jig 18 as shown in FIG.
As shown in FIG. 10C, the pulling jig 18 is provided with an enlarged diameter portion 21 at the tip of the rod body portion 20. The diameter of the rod body portion 20 is slightly smaller than the diameter of the through hole 16 of the engagement member 6. On the other hand, the enlarged diameter portion 21 is larger than the diameter of the through hole 16 of the engagement member 6.

  The rod body portion 20 is inserted into the roller body 11 in a state where the rod body portion 20 of the pulling jig 18 is inserted into the through hole 16 of the engaging member 6, and the rod body portion 20 as shown in FIG. Is further inserted through the opening 7 of the elastic ring 5. Then, as shown in FIG. 11A, the front end side of the pulling jig 18 is pulled to draw the engaging member 6 toward the elastic ring 5 side. Further, as shown in FIG. 11B, the front end side of the pulling jig 18 is pulled to pull the engaging member 6 into the opening 7 of the elastic ring 5. At this time, since the holding jig 23 is in contact with the right side of the elastic ring 5 in the drawing, the movement of the elastic ring 5 to the right side of the drawing is restricted. Therefore, the end portion of the engagement member 6 is strongly pressed against the opening of the opening 7 of the elastic ring 5. Further, since the end portion of the engagement member 6 is an inclined surface 27, the end portion of the engagement member 6 easily enters the opening 7 of the elastic ring 5. Subsequently, by pulling the pulling jig 18, the entire engaging member 6 enters the opening 7 of the elastic ring 5 as shown in FIG.

Thereafter, the pulling jig 18 and the holding jig 23 are removed from the roller body 11 as shown in FIG.
As a result, only the power transmission member 2 in a state where the engaging member 6 is mounted in the opening 7 of the elastic ring 5 remains at a predetermined position in the roller body 11.

In the method for installing the power transmission member 2 described above, the elastic ring 5 in a natural state is inserted into the roller body 11 and placed at a predetermined position (final position), and the engaging member is engaged with the opening 7 of the elastic ring 5 on the spot. 6, the power transmission member 2 is assembled, but the engaging member 6 may be inserted into the opening 7 of the elastic ring 5 in a state where the elastic ring 5 is placed in the vicinity of the opening of the roller body 11.
For example, as shown in FIG. 12B, the entire elastic ring 5 is inserted into the roller body 11 and placed near the opening of the roller body 11. Subsequently, the engaging member 6 is pushed into the opening 7 of the elastic ring 5 in the vicinity of the opening of the roller body 11 to complete the power transmission member 2.

And the press jig | tool 25 is inserted in the roller main body 11, the power transmission member 2 is pushed and moved with the press jig 25, and the power transmission member 2 is moved to a predetermined position.
The pressing jig 25 is provided with a sensor 26 that detects the pressing force, and detects the pressing force when the power transmission member 2 linearly moves or starts moving. That is, the force required to move the power transmission member 2 is measured. This pressing force correlates with the coupling force between the power transmission member 2 and the roller body 11 and the transmittable torque. If the pressing force at the time of moving the power transmission member 2 with the pressing jig 25 is small enough, the torque that can be transmitted is small and it is removed as a defective product.
In the case of this method, since the engaging member 6 is inserted into the opening 7 of the elastic ring 5 in a state where the elastic ring 5 is in the vicinity of the opening of the roller body 11, workability is high.

The position when the entire elastic ring 5 is inserted into the roller body 11 and the engaging member 6 is pushed into the opening 7 of the elastic ring 5 is in the vicinity of the position (final position) where the elastic ring 5 is finally installed. There may be.
That is, as shown in FIG. 13B, the entire elastic ring 5 is inserted into the roller body 11, and the elastic ring 5 is placed near the final position. Specifically, since the power transmission member 2 is finally mounted on the motor unit 3 indicated by a two-dot chain line, the elastic ring 5 is placed in the vicinity of the position. Subsequently, the engaging member 6 is pushed into the elastic ring 5 in the roller body 11 at the position to complete the power transmission member 2.

  Further, as shown in FIG. 14, only the distal end side of the elastic ring 5 may be inserted into the roller body 11, and the engaging member 6 may be pushed into the opening 7 of the elastic ring 5 in this state to complete the power transmission member 2. . Then, the power transmission member 2 is pushed and moved by the pressing jig 25 to move the power transmission member 2 to a predetermined position. Also in this case, the pressing force when the power transmission member 2 moves linearly or starts moving is detected by the sensor 26, and the pressing force when the power transmission member 2 is moved by the pressing jig 25 is small. If it is sufficient, it is removed as a defective product.

In the embodiment described above, the opening shape of the elastic ring 5 and the outer shape of the engaging member 6 are both star-shaped, but the present invention is not limited to this configuration. For example, a polygonal shape such as a hexagon in FIG. 15 or a plurality of engaging projections 28 as shown in FIG. 16 may be provided. Further, the number of the engagement protrusions 28 is arbitrary, and may be one as shown in FIG.
Further, a recess may be provided in the engaging member 6 in place of the protrusion.
In the above-described embodiment, the opening shape of the elastic ring 5 and the outer shape of the engaging member 6 are similar, but they may be different from each other.

The elastic ring 5 employed in the embodiment described above has a certain degree of rigidity and maintains a cylindrical shape even in a natural state, but may be a softer one.
Further, for example, even when the outer shape is a shape other than a cylindrical shape such as an ellipse as in the elastic ring 30 shown in FIG. 18, the external member is applied along the inner wall of the roller body 11 or the engaging member 6 is mounted. It may be cylindrical when it is in the state.

  Further, like the elastic ring 31 shown in FIG. 19, the outer shape may not be an accurate circle. In the elastic ring 31, the diameter of the circumscribed circle of the elastic ring 31 in a natural state or the like is smaller than the inner diameter of the roller body 11, and the diameter of the circumscribed circle when the engaging member 6 is attached is larger than the inner diameter of the roller body 11. large.

  When the elastic rings 5, 30, 31 are soft, the outer diameter of the elastic rings 5, 30, 31 may be the same as the inner diameter of the roller body 11. If the elastic rings 5, 30, 31 are soft, the outer diameter of the elastic rings 5, 30, 31 may be slightly larger than the inner diameter of the roller body 11.

DESCRIPTION OF SYMBOLS 1 Motor built-in roller 2 Power transmission member 3 Motor unit (power part)
5, 30, 31 Elastic ring 6 Engaging member 7 Opening 8 Ring side engaging part 11 Roller body 12 Motor (power part)
13 Reducer 15 Outer engagement part 17 Inner engagement part

Claims (6)

It has a hollow roller body, a power unit including a motor, and a power transmission member. The power unit and the power transmission member are built in the roller body, and the rotational force of the power unit is transmitted to the roller body via the power transmission member. In the motor built-in roller
The power transmission member has an elastic ring and an engagement member,
The elastic ring is expandable / contractable, and has an opening in the center. The opening has a ring-side engaging portion. The diameter of the circumscribed circle of the elastic ring in a natural state or a state approximated to a circle is the roller body. Smaller than the inner diameter of
The engaging member has an outer engaging portion and an inner engaging portion,
The engaging member is attached to the opening of the elastic ring, and the outer engaging portion is engaged with the ring-side engaging portion,
The diameter of the circumscribed circle of the elastic ring in a state where the engagement member is mounted is larger than the inner diameter of the roller body,
A motor built-in roller, wherein a power portion engages with an inner engagement portion of an engagement member inside the roller main body, and an outer peripheral surface of the elastic ring is in contact with an inner peripheral surface of the roller main body. It has a hollow roller body, a power unit including a motor, and a power transmission member. The power unit and the power transmission member are built in the roller body, and the rotational force of the power unit is transmitted to the roller body via the power transmission member. In the motor built-in roller
The power transmission member has an elastic ring and an engagement member,
The elastic ring is expandable / contractable and has an opening in the center. The opening has a ring-side engagement portion. The diameter of the circumscribed circle of the elastic ring is large enough to be easily inserted into the roller body. And
The engaging member has an outer engaging portion and an inner engaging portion,
The engaging member is attached to the opening of the elastic ring, and the outer engaging portion is engaged with the ring-side engaging portion,
The diameter of the circumscribed circle of the elastic ring in a state where the engagement member is mounted is larger than the inner diameter of the roller body,
A motor built-in roller, wherein a power portion engages with an inner engagement portion of an engagement member inside the roller main body, and an outer peripheral surface of the elastic ring is in contact with an inner peripheral surface of the roller main body. In the method for manufacturing the motor built-in roller according to claim 1 or 2,
Inserting a part or all of an elastic ring approximated to a natural state or a circular shape into the roller body, and inserting an engaging member into an opening of the elastic ring in this state to assemble a power transmission member. Manufacturing method of motor built-in roller.   The method for manufacturing a roller with a built-in motor according to claim 3, further comprising a step of applying an external force in the axial direction to the assembled power transmission member to move it in the roller body in the axial direction.   5. The method of manufacturing a roller with a built-in motor according to claim 3, wherein a force required for the movement is measured when the power transmission member is moved in the axial direction. A power transmission member built in a hollow roller body of a roller with a built-in motor, wherein the power transmission member generates a rotational force output from an output shaft of a power unit including a motor disposed in the roller body. It is transmitted to
An elastic ring and an engaging member;
The elastic ring is expandable / contractable, and has an opening in the center. The opening has a ring-side engaging portion. The diameter of the circumscribed circle of the elastic ring in a natural state or a state approximated to a circle is the roller body. Smaller than the inner diameter of
The engaging member has an outer engaging portion and an inner engaging portion,
The engaging member is attached to the opening of the elastic ring, and the outer engaging portion is engaged with the ring-side engaging portion,
The diameter of the circumscribed circle of the elastic ring in a state where the engagement member is mounted is larger than the inner diameter of the roller body,
A power transmission member characterized in that a power portion engages with an inner engagement portion of an engagement member inside the roller main body, and an outer peripheral surface of the elastic ring is in contact with an inner peripheral surface of the roller main body.

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