JP2616872B2 - Roller and roller conveyor with built-in motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller conveyor device in which a plurality of rollers are arranged side by side on a frame and which conveys articles on the rollers, and to a roller with a built-in motor mainly used as a roller of the roller conveyor device.

[0002]

2. Description of the Related Art Roller conveyors are excellent in the efficiency of conveying flat-bottomed articles and are widely used in various factories, warehouses and delivery points. The roller conveyor device has a number of rollers arranged side by side on a frame. Some of these rollers are driving rollers that can be rotated by power, and the rest are idle rollers. By rotating the driving roller, a moving force is applied to the article on the roller, and the article is conveyed by the moving force.

[0003] In a roller conveyor apparatus, there is a case where only one drive roller is rotated by power. However, in order to carry articles smoothly, several drive rollers are continuously arranged. It is preferable to arrange at relatively short intervals like every other book.

[0004] A typical example of such a configuration in which a plurality of rollers are driven by power is disclosed in, for example, Japanese Utility Model Laid-Open No. 3-5391.
There is a roller conveyor device disclosed in Japanese Patent No. In the prior art roller conveyor device disclosed in Japanese Utility Model Laid-Open Publication No. 3-53913, all rollers are rotatably supported by a frame, and a sprocket is mounted on the shaft of some rollers, and the sprocket is rotated. Then, the rollers are also configured to rotate. And the motor and the reduction gear are fixed to the frame of the roller conveyor device,
A sprocket attached to the output shaft of this reducer,
A chain is suspended between the roller and the sprocket. In the conventional roller conveyor device, power is transmitted to each roller by a chain from a motor or the like fixed to a frame, and a plurality of rollers are rotated. Another configuration is to drive multiple rollers with power.
Japanese Patent Application Laid-Open No. 60-122614 discloses
Have been. Japanese Patent Application Laid-Open No. Sho 60-122614 discloses
In the structure, a roller with a built-in motor is adopted as one of the rollers.
ing. And a ring-shaped groove is provided on the outer circumference of each roller.
The belt is suspended in this groove and power is transmitted to adjacent rollers.
Configuration.

[0005]

In the prior art roller conveyor device, a plurality of rollers can be driven by power, and articles can be smoothly transported. However, the conventional roller conveyor device obtains power from a motor fixed to a frame, so that the arrangement of power transmission means such as a chain is complicated, and assembly and maintenance are difficult, and the outer shape of the device itself is large. There was a problem that became a thing.

That is, in the roller conveyor device, since the rollers are arranged on the frame so that the upper surfaces thereof are at the same height, the sprockets attached to the rollers are all arranged at a substantially constant height from the ground. On the other hand, if a configuration is adopted in which the motor and the speed reducer are arranged below the rollers, for example, the sprocket of the speed reducer is separated from the sprocket of the rollers in the height direction. Therefore, in the roller conveyor device of the prior art, the chain must be suspended on the sprocket at a position separated in the height direction, and the suspension route of the chain must be complicated.

On the other hand, if the motor or the like is mounted at the same height as the rollers, the suspension path of the chain is simplified, and the problems of assembly and maintenance are eliminated. However, in this configuration, since the motor and the like are mounted so as to protrude greatly from the side of the frame to the outside, there is a serious disadvantage that a large space is required for installing the roller conveyor device. Also, as disclosed in Japanese Patent Application Laid-Open No. 60-122614.
If power is to be obtained from rollers with built-in motors,
Although the suspension path of the chain is simplified,
A structure in which a belt or the like is suspended around the roller
If the length of the roller that contributes to article conveyance is greatly reduced,
I will. As a result, the width of the roller conveyor device must be increased.
There is no choice but to install a large space for roller conveyor equipment
There is a significant disadvantage that it costs.

The present invention, which focuses on these problems of the prior art, aims to provide a roller conveyor device in which the arrangement of the power transmission means is simple, assembly and maintenance are easy, and the outer shape is small. . Another object of the present invention is to provide a roller with a built-in motor adapted to the roller conveyor device described above.

[0009]

In order to achieve the above-mentioned object, the present invention provides a roller conveyor device in which a plurality of rollers are arranged in a frame and which conveys articles on the rollers. A roller, at least one driven roller, and a power transmission means, wherein the roller with a built-in motor has a roller body and a fixed shaft protruding from the roller body.
The a, the inner roller body from a drive shaft the fixed shaft rotated by rotational force of a motor with reduction gears and transmits the decelerated motor and rotational force of the motor to the roller body is capable of rotating built The driven roller is rotatably supported by the frame, and the driven roller is coupled to the drive shaft of the motor built-in roller by power transmission means, and the driven roller is rotatable by receiving power transmitted from the motor built-in roller. a roller conveyor according to claim.

Further, the invention of a roller with a built-in motor applicable to this roller conveyor device is directed to a roller body and a roller body.
A motor-equipped roller that has a fixed shaft that protrudes from the roller body, and a motor and a speed reducer that transmits the rotational force of the motor to the roller body in a decelerated manner and that can rotate on the roller body. Is the rotating drive shaft a fixed shaft?
And is characterized by being projected from the front.

[0011]

The roller with a built-in motor according to the present invention has a built-in motor inside the roller body and a speed reducer for reducing and transmitting the rotational force of the motor to the roller body. Spins at a suitable low speed. Therefore, the motor built-in roller of the present invention itself functions as a driving roller. In addition, the roller with a built-in motor according to the present invention has a function as a drive source for driving other rollers since a drive shaft that rotates by the rotational force of the motor projects from the roller body.

Further, the roller conveyor device of the present invention has a motor built-in roller having a protruding drive shaft which is rotated by the rotating force of the motor, and the rotating force is transmitted from the motor built-in roller to the driven roller. Here, since the roller with a built-in motor is fixed to the frame such that the upper surface thereof is at the same height as the other rollers, the height of the drive shaft is substantially equal to the height of the other driven shafts. Therefore, the power transmission means for transmitting power from the drive shaft of the motor built-in roller to the driven roller has a small deviation in the height direction and is extremely simple.

Since the motor is built in the roller, the motor does not protrude outside the frame.

[0014]

EXAMPLES Hereinafter, specific examples of the present invention will be described. FIG. 1 is a front view of a roller conveyor device according to a specific embodiment of the present invention. FIG. 2 is a perspective view of a main part of a roller conveyor device according to a specific embodiment of the present invention. FIG. 3 is a sectional view of a roller with a built-in motor according to a specific embodiment of the present invention. FIG. 4 is a mechanism diagram of the roller conveyor device of FIG. FIG. 5 is a sectional view taken along line AA of FIG. FIG. 6 is a sectional view taken along line BB of FIG. FIG. 7 is a cross-sectional view taken along the line CC of FIG.

1 and 2, reference numeral 1 denotes a roller conveyor device according to a specific embodiment of the present invention. The roller conveyor device 1 of the present embodiment has a large number of rollers arranged on a frame 2 as in the prior art. In the roller conveyor device 1 according to the present embodiment, the rollers are roughly divided into three types of rollers: a motor built-in roller 3, a driven roller 5, and an idle roller 6. A power transmission means 8 is provided between the motor built-in roller 3 and the driven roller 5.

The structure of each roller will be described sequentially. The roller 3 with a built-in motor has a motor 15 inside a cylindrical roller body 9.
The drive shaft 43 protrudes from the roller body 9. First, the roller body 9 will be described.
0 and 11 are attached. The roller body 9 is fixed to the fixed shaft 1 by three bearings 12, 13, 14.
9 and 20 are rotatably inserted. In addition, a central portion inside the roller body 9 is supported by a fixed frame 29 described later by a bearing 25. An internal gear 30 described later is inserted into the roller body 9, and both are integrally connected by a pin 39. Therefore, the roller body 9 rotates integrally with the internal gear 30.

The motor 15 includes a stator 16 and a rotor 17 in the same manner as a known roller with a built-in motor. Here, the stator 16 is a coil housed in an iron core, and is inserted inside a fixed frame 29 integrally attached to a fixed shaft 19 protruding from the roller body 9. The rotor 17 is a cage rotor, and is integrally fixed to the rotation shaft 23. The rotating shaft 23 is rotatably supported at the center of the fixed frame 29 by bearings 21 and 22. The tip of the rotating shaft 23 is finely processed, and a gear 24 is engraved at a boundary between the finely processed portion and the others.

The speed reducer 18 is composed of a two-stage planetary gear train and a final stage by a gear 24, planet gears 26, 27, 28, an internal gear 30, arm gears 32, 33, and a fixed arm 35 provided on a rotating shaft 23. A series of speed reduction mechanisms composed of a gear train are configured. The first planetary gear train of the speed reduction mechanism of the speed reducer 18 includes a gear 24 provided on the rotating shaft 23 and an arm gear 32,
And the internal gear 30.

The internal gear 30 employed in this embodiment has an outer shape equal to the inner diameter of the roller body, and has a tooth profile elongated in the longitudinal direction inside a cylindrical member having a connecting member 38 integrally provided on one side. It was formed. The sleeve-shaped gear 36 is mounted on the inner surface of the opening-side end. The sleeve-shaped gear 36 is a thin-walled cylindrical material in which gears are carved on the inner surface and the outer surface, and partially changes the inner diameter and the module of the internal gear 30. The arm gear 32
The arm and the gear are integrated.

In the first combination of the planetary gear trains, four planetary gears 26 are rotatably and revolvably supported by the arm of an arm gear 32 at equal intervals, and the planetary gears 26 and the gear 24 of the rotating shaft 23 are rotatably supported. , Which are fitted to both sleeve-shaped gears 36 mounted on the outermost internal gear 30.

The second-stage planetary gear train of the speed reducer 18 is constituted by the gear portion of the arm gear 32, the planetary gear 27, the arm gear 33, and the internal gear 30. The arm gear 33 is an arm gear 32 described above in that an arm part supporting the planetary gear 27 and a gear part acting as the next gear are integrated.
However, the arm gear 33 is provided with a through hole at the center, and the hole is partially hexagonally machined. The combination of the second-stage planetary gear train is the same as that of the first-stage planetary gear train described above.
3 is rotatably and revolvably supported by the arm of
And the internal gear 30.

The final gear train of the speed reducer 18 is constituted by the gear portion of the arm gear 33, the planetary gear 28, the fixed arm 35, and the internal gear 30. Here, the fixed arm 35 is an integrated body of the arm supporting the planetary gear 28 and the fixed shaft 20. As a unique configuration of the fixed arm 35, a through hole 31 is provided at the center of the fixed shaft 20.

Each of the planetary gears 28 is rotatably supported by a fixed arm 35. A part of the fixed arm 35 protrudes outside from the roller body 9 as a fixed shaft 20.
Since the fixed shaft 20 is integrally connected to the frame 2 of the roller conveyor device as described later, the planetary gear 28
Cannot revolve. The planetary gear 28 is engaged with the internal gear 30 in the same manner as the planetary gear 27 described above.

The drive shaft 43 has a hexagonal machining portion 46 at one end.
Is provided, and a gear 45 is attached to the other end. One end of the drive shaft 43 on which the hexagonal processing 46 has been performed is inserted into the hexagonally processed hole of the arm gear 33 through the through hole 31 of the fixed shaft 20, and the driving shaft 43 is provided with the gear 45. The other end of the shaft 43 projects from the fixed shaft 20. Here, the coupling relationship between the drive shaft 43 and the arm gear 33 will be described.
It is fixed so that it can rotate integrally. On the other hand, the drive shaft 43 and the fixed shaft 20 are in contact with each other via the sleeve 47, and the drive shaft 43 can rotate in the through hole 31 of the fixed shaft 20.

Next, the operation of the motor built-in roller 3 of this embodiment will be described. When driving the motor built-in roller 3, power is supplied to the stator 16 of the motor 15 via a not-shown conductor passing through the hole 48 of the fixed shaft 19, and the rotor 17 is rotated. Then, this rotational force is input from the gear 24 of the rotating shaft 23 to the speed reducer 18, and the internal gear 30 rotates at a greatly reduced rotation speed. Therefore, the roller body 9 integrated with the internal gear 30 is rotated at a low speed.

The arm gear 33 of the second-stage planetary gear train
And the drive shaft 43 is fixed so as to be integrally rotated by the hexagonal machining portion 46.
3, the rotation speed is higher than that of the roller body 9. Therefore, according to the motor built-in roller 3 of this embodiment, when the motor 15 rotates, not only the roller body 9 rotates on its own axis, but also the drive shaft 43 protruding from the roller body 9.
The rotational force can be taken out.

Next, the configuration of the driven roller 5 will be described with reference to FIG. The driven roller 5 includes a roller body 50 that is slightly thinner than the motor-equipped roller 3,
53, and the roller body 5
0 is rotatable with respect to the fixed shaft 51. Fixed shaft 5
1 is provided with a through hole 62, and a driven shaft 54
Is inserted.

In the driven roller 5 of this embodiment, a gear train is provided in the roller body 50. The gear train of the driven roller 5 includes an introduction gear 55, four intermediate gears 56, and a fixed arm 57. Introduction gear 55
Is fixed to the tip of a driven shaft 54 inserted into the through hole 62 of the fixed shaft 51, and rotates together with the driven shaft 54. 4
The two intermediate gears 56 are rotatably supported by the fixed arm 57 and are fitted to the introduction gear 55 and the internal gear 58. The fixed arm 57 is integrally fixed to the fixed shaft 51 by a key (not shown). And the internal gear 58 is the roller body 5
0. Therefore, by rotating the driven shaft 54, the rotational force is transmitted to the internal gear 58 via the intermediate gear 56, and the roller body 50 rotates at the reduced rotation speed.

The idling roller 6 does not have a gear train, but simply has a roller body attached to a fixed shaft via a bearing.

In this embodiment, the power transmission means is such that a bevel gear or the like is disposed in two gear boxes 60 and 61, and a power transmission shaft 63 is penetrated between the gear boxes 60 and 61 to transmit power. It is.

Next, the assembly structure of the roller conveyor device 1 of the present embodiment will be described. As shown in FIG. 1, a roller conveyor device 1 according to the present embodiment includes a motor-equipped roller 3 on a frame 2 formed of a U-shaped steel material in a rectangular frame shape.
And one driven roller 5 and five idle rollers 6 are sequentially arranged. Each of the rollers has a fixed shaft integrally connected to the frame 2. Here, the roller 3 with a built-in motor of each roller is thicker than the other rollers, so that the drive shaft 43 of the roller 3 with a built-in motor is fixed to the other rollers in order to match the height of the highest point of each roller. It is mounted slightly lower than the shaft.

The driven roller 5 and the five idle rollers 6
Since the roller body is mounted on a fixed shaft via a bearing, all of these rollers 5 and 6 are rotatable with respect to the frame 2.

The drive shaft 43 of the motor built-in roller 3
5 and 7, the driven shaft 54 of the driven roller 5 penetrates the wall surface of the frame 2 and protrudes outward. The distal ends of the drive shaft 43 and the driven shaft 54 are connected to a gear box 60 provided on the outer surface of the frame 2.
61. In a gear box 60 provided on the side surface of the motor built-in roller 3, an intermediate gear 74 in which a bevel gear 72 and a spur gear 73 are integrally formed is supported on a wall surface 71 through which the drive shaft 43 penetrates so as to be able to idle. Also,
A through hole is provided in the side surface 76 of the gear box 60,
The transmission shaft 63 is inserted into the through hole and rotatably supported.

A bevel gear 77, which forms a miter gear integrated with the bevel gear 72, is fixed to the end of the transmission shaft 63. The gear 45 attached to the drive shaft 43 of the motor built-in roller 3 is fitted with a spur gear 73 of an intermediate gear 74 supported by the gear box 60 so as to be able to run idle. It is fitted with a bevel gear 77 attached to the tip of the shaft 63.

On the other hand, the transmission shaft 63 extending from the gear box 60 passes through the gear box 61, and the transmission shaft 63 is rotatably supported by both side surfaces of the gear box 61. In the gear box 61, a bevel gear 75 is attached to the transmission shaft 63, and the bevel gear 75 is fitted with a bevel gear 59 attached to the tip of the driven shaft 54 protruding from the driven roller 5. I have.

Next, the operation of the roller conveyor device 1 of this embodiment will be described. When the roller conveyor device 1 of the present embodiment is operated, the motor 15 of the motor built-in roller 3 is used.
And the motor 15 in the motor built-in roller 3 is rotated. Then, as described in the operation of the motor-equipped roller 3, the roller body 9 rotates on the roller 3 and the drive shaft 43 rotates. This rotational force is transmitted from the gear 45 to the intermediate gear 7 in the gear box 60.
The torque is transmitted to the transmission shaft 63 from the intermediate gear 74 via the bevel gear 77. Then, in the gear box 61, the rotational force of the transmission shaft 63 is transmitted to the driven shaft 54 via the bevel gear 75 and the bevel gear 59 of the driven shaft 54. When the driven shaft 54 rotates, it is transmitted from the introduction gear 55 attached to the driven shaft 54 to the internal gear 58 via the intermediate gear 56, and the roller body 50 integrated with the internal gear 58 rotates. Therefore, in the roller conveyor device 1 of the present embodiment, with the rotation of the motor 15 in the motor built-in roller 3,
Not only the motor built-in roller 3 but also the driven roller 5 rotates.

Therefore, a moving force is applied to the articles on the roller conveyor device 1 by both the motor built-in roller 3 and the driven roller 5. Then, the articles on the idling rollers are sequentially pushed forward to convey the articles to a predetermined position.

In the above embodiment, the configuration in which the drive shaft 43 of the roller 3 with built-in motor is connected to the arm gear 33 belonging to the second-stage planetary gear train of the speed reducer 18 has been disclosed. According to the configuration of the present embodiment, the rotational speed of the drive shaft 43 is a rotational speed several steps faster than the rotational speed of the roller body 9 of the roller 3 with a built-in motor. Therefore, according to the configuration of the present embodiment, there is an effect that a large driving force of horsepower can be taken out by the thin drive shaft 43. It is recommended that the rotation speed of the drive shaft 43 be faster than the rotation speed of the roller body 9 of the motor-equipped roller 3 because the drive shaft 43 can be made thinner.

The number of rotations of the drive shaft 43 is controlled by the motor built-in roller 3.
In addition to the configuration as in the present embodiment, the configuration in which the rotation speed of the roller body 9 is made faster than the configuration in which the drive shaft 43 is coupled to the arm gear 32 belonging to the first-stage planetary gear train of the reduction gear 18,
A configuration in which the drive shaft 43 is directly coupled to the rotation shaft 23 of the motor 15 is also effective. However, according to these configurations, the arm gear that the drive shaft 43 penetrates is supported, and a sleeve for idling the arm gear is newly required.
It is necessary to pay attention to the fact that the diameter of the sleeve may be increased and the friction of the sleeve may reduce the mechanical efficiency.

In the present embodiment, the drive shaft 43 of the motor built-in roller 3 has a hexagonal portion 46 at one end, and the hexagonal portion 46 is inserted into the hexagonal portion of the hole of the arm gear 33. According to this configuration, the drive shaft 43 can be inserted and removed from the roller body 9. Therefore, according to the motor built-in roller 3 of the present embodiment, the drive shaft 4
3 can be taken out from the through hole 20 of the fixed shaft 20 and used as a normal roller with a built-in motor.

As described above, in this embodiment, the drive shaft 43
The hexagonal machining portion 46 is provided on the drive shaft 43 so that can be inserted and removed from the through hole 20 of the fixed shaft 20. In addition, a spline or serration is provided on the drive shaft, or a part of the drive shaft 43 is chamfered. The same effect can be expected. Of course, when it is not necessary to pull out the drive shaft 43 from the roller body 9, a configuration in which the drive shaft 43 and the arm gear 33 are integrally fixed by a key can be adopted.

In the roller conveyor device of this embodiment, the driven roller 5 has a gear train inside, and the rotation of the driven shaft 54 is reduced by this gear train and transmitted to the roller body 50. According to this configuration, since the rotation of the transmission shaft 63 can be set at a high speed, a large horsepower can be transmitted to the driven shaft 54 with the thin transmission shaft 63, which is preferable.
However, the roller conveyor device of the present invention has the following structure.
It is not limited to a configuration having a gear train inside, and does not have a gear train, for example, a roller body and a shaft are completely integrated, and a driven shaft rotatably supported on a frame by a pillow block or the like can be applied. is there.

In the present embodiment, one driven roller 5 is provided by one motor built-in roller 3 disposed at the end of the frame.
Is described, but the number of driven rollers, the number of rollers 3 with built-in motors, or the mounting position is, of course, arbitrarily set according to the articles mounted on the roller conveyor device. For example, by adopting a long transmission shaft 63, a larger number, for example, all the rollers can be rotated. Further, a configuration in which an idling roller is interposed between the motor built-in roller 3 and the driven roller 5 is also possible. Further, a configuration in which a motor built-in roller is provided at an intermediate portion of the roller conveyor device is also possible.

In this embodiment, the diameter of the motor built-in roller 3 is larger than that of the other rollers.
An intermediate gear 74 is provided to transmit the torque of No. 3 to the transmission shaft 63. However, if the diameter of the roller 3 is the same as the other rollers, the intermediate gear 74 may not be necessary.

In the roller conveyor device of this embodiment, a power transmission means using a transmission shaft has been disclosed. However, a power transmission means such as a belt, a gear, or a chain may be employed. Although it is a rare example, the motor built-in roller 3
Can be coupled to a load other than the driven roller.

[0046]

According to the roller conveyor device of the present invention, the rotational force is transmitted to the driven roller using the drive shaft of the motor built-in roller attached to the frame as a power source. Therefore, the height of the drive shaft that is the power source is almost equal to the height of the other driven shafts, and the power transmission means that transmits power from the drive shaft of the motor built-in roller to the driven roller has the effect of reducing the deviation in the height direction. is there. Therefore, the roller conveyor device of the present invention
The arrangement of the power transmission means and the transmission path are simple, and there is an effect that assembly and maintenance are easy. Further, the roller conveyor device of the present invention has the effect of being small in size without requiring an installation place.

Further, the roller with a built-in motor according to the present invention has an effect that the driven shaft and the like can be rotated while rotating by itself. In addition, the roller with a built-in motor of the present invention
This has the effect of contributing to the miniaturization of the bear device.

[Brief description of the drawings]

FIG. 1 is a front view of a roller conveyor device according to a specific embodiment of the present invention.

FIG. 2 is a perspective view of a main part of a roller conveyor device according to a specific embodiment of the present invention.

FIG. 3 is a sectional view of a roller with a built-in motor according to a specific embodiment of the present invention.

FIG. 4 is a mechanism diagram of the roller conveyor device of FIG. 1;

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a sectional view taken along line CC of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller conveyor apparatus 2 Frame 3 Roller with a built-in motor 5 Follower roller 6 Idling roller 8 Power transmission means 9 Roller body 18 Reduction gear 32 Arm gear 43 Drive shaft 46 Hexagonal machined part 63 Transmission shaft

Claims (2)

(57) [Claims] 1. A roller conveyor device in which a plurality of rollers are arranged side by side on a frame and conveys articles on the rollers,
At least one roller with a built-in motor, at least one driven roller and power transmission means,
Having a roller body and a fixed shaft protruding from the roller body,
Drive shaft said rotated by the rotational force of the motor with the inner roller body which is capable of rotating a built-in reduction gear that transmits by decelerating the motor and a rotation force of the motor to the roller body
The driven roller protrudes from the fixed shaft, and the driven roller is rotatably supported by the frame.The driven roller is connected to the drive shaft of the motor built-in roller by power transmission means, and the driven roller can receive power from the motor built-in roller and rotate. A roller conveyor device, characterized in that: 2. A roller body and a roller projecting from the roller body.
A motor that has a fixed shaft and has a built-in motor inside a roller body and a built-in motor-reduced roller that reduces and transmits the rotational force of the motor to the roller body and is rotatable, and is driven by the rotational force of the motor. A roller with a built-in motor, wherein a shaft protrudes from a fixed shaft .