JP2690830B2 - Self-propelled transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled transfer device for transferring a work such as an automobile body on a manufacturing line or the like.

[0002]

2. Description of the Related Art Heretofore, it has been known that, when a work is conveyed on a manufacturing line or the like, a conveying device as disclosed in, for example, JP-A-2-70207 is used. This type of transfer device B, which is generally called an overhead type, has a drive wheel 5 that rotates along the upper surface of a rail 50 that extends along the work transfer direction, as shown in FIG.
1, a motor 52 for driving the drive wheel 51, and a train 54 that is self-propelled with a power collection unit 53 for transmitting power to the motor 52, and a driven wheel 55 that is in contact with the upper surface of the rail 50. A driven unit 56 that rotatably supports the driven wheel 55 is provided. The train 54 and the driven unit 56 are integrally connected to each other by a connecting member 57, and the connecting member 57 is connected to a work support base 58 that supports a work. The work support base 58 is provided at a position where the weight of the work is evenly distributed between the train 54 and the driven unit 56. The rail 50 is a monorail type with an I-shaped cross section, and one side surface thereof is provided with a power feeding rail 59 with which the current collecting unit 53 contacts.

However, according to the above-mentioned transfer device B, since the work support base 58 is provided at a position where the weight of the work is evenly distributed to the train 54 and the driven unit 56, the driven wheels are provided. Although the load applied to the drive wheel 51 is reduced by 55, the contact friction between the rail 50 and the drive wheel 51 is relatively small. As a result, when the drive wheels 51 are rotated at a high speed to convey the work at a high speed, the drive wheels 51 run idle on the rails 50, and there is a disadvantage that a desired conveyance speed cannot be obtained. Further, the drive wheels 51 may slip or slip on the rails 50 even if the work wheels are suddenly accelerated or decelerated during conveyance.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 3-95021, there has been proposed a transfer device in which the drive wheel 51 is discharged and a linear motor is used as a power source thereof.

Although not shown, this type of transfer device is provided with a primary coil along a rail extending along the transfer direction of the work, and is provided with a hanger for supporting the work and is movable along the rail. The traveling body is provided with a permanent magnet facing the primary coil. According to such a transfer device using a linear motor, the work can be transferred at high speed, and the stop position and the like can be controlled with high accuracy.

However, when the linear motor is used as described above, there is a disadvantage that the apparatus becomes expensive and the cost increases.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a self-propelled transfer device capable of high-speed transfer of a work without increasing the cost by solving the above inconvenience.

[0008]

In order to achieve such an object, the present invention provides a train that runs by itself along a rail extending along the work transfer direction, and a train connected to the train. A self-propelled transfer device including a hanger that holds a work at a position below a train, wherein the train includes drive wheels that rotate along the rails, and a drive motor that drives the drive wheels. A steady rest roller sandwiching the upper and lower surfaces of the rail advances the drive wheel from the train along the rail.
Is provided at a distance from the electric train via a connecting member extending rearward in the direction , and the hanger is hung on the connecting member at an inner position between the electric train and the steady rest roller, and the hanger is hung. Distance between position and axis of rotation of the drive wheel
A grant of said coupling member from said hanger as smaller than the distance between the rotational axis of the steady rest roller and the hanging installation position
The weight of the drive wheels is greater than that of the steady rest roller .

[0009]

According to the present invention, the hanger swings from the train.
Suspended on the connecting member inside the stop roller
Between the suspension position of the hanger and the rotation axis of the drive wheel.
The distance between the suspension position and the rotation axis of the steady rest roller.
By making the distance smaller than the distance between and, most of the load of the work is applied to the drive wheel. As a result, the adhesion between the drive wheel and the rail is increased, the drive wheel is prevented from idling when the drive wheel is rotated at high speed, and the work can be conveyed at high speed. Further, since the steadying rollers for sandwiching the upper and lower surfaces of the rail are connected to the electric train by the connecting member, the vibration such as the rocking in the front-rear direction during traveling of the electric train is prevented, and the work is conveyed along the rail. Is performed with high precision.

[0010]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory side view of this embodiment, and FIG. 2 is an explanatory front view of FIG.

In the figure, 1 is a rail extending along the conveying direction of the work W, 2 is a train that runs along the rail 1, 3 is a steady rest unit that is movable along the rail 1, 4 Is a connecting member that connects the train 2 and the steady rest unit 3, and 5 is a hanger that is suspended from the connecting member 4 and holds the work W at the lower position thereof.

Each part will be described in detail.

As shown in FIG. 1 and FIG. 2, the rail 1 is suspended by a support member 8 provided on a column 6 through a beam member 7. Further, the rail 1 has an upper rail portion 9
I and the lower rail part 10 are connected via a connecting part 11.
It is made of shaped steel. On each side surface of the upper rail portion 9 and the lower rail portion 10, an abutting member 15 is provided on which abutting surfaces of first steady rest rollers 12, 13, 14 described later abut. Further, a power supply rail 16 for supplying power to the train 2 is provided on one side surface of the connecting portion 11, and the power supply rail 16 is connected to a power supply device (not shown).

As shown in FIGS. 1 and 2, the electric train 2 has a drive wheel 18 made of urethane rubber, which is in contact with the upper surface of the upper rail portion 9 and rotates on an upper portion of a frame 17, and the drive wheel 18. And a drive motor 19 for driving the.
A first steady rest roller 12 is provided at a lower portion of the frame 17 so as to come into contact with both side surfaces of the upper rail portion 9 and rotate. Further, the support member 20 extending downward from the frame 17 is provided with a current collecting unit 21 that contacts the power supply rail 16 and sends electricity to the drive motor 19. In addition, the support member 20 is provided with a first steady rest roller 13 which is coaxially downwardly opposed to the first steady rest roller 12 and is in contact with both side surfaces of the lower rail portion 10 to rotate downward. There is. The above-described first steadying rollers 12 and 13 prevent the train 2 from swinging in the left-right direction orthogonal to the traveling direction thereof. Further, a control device 22 for electrically controlling the drive of the drive motor 19 is provided at the lower end of the support member 20.

As shown in FIG. 1, the steady rest unit 3 faces the upper and lower portions of the frame 23 and abuts on the upper surface of the upper rail portion 9 and the lower surface of the lower rail portion 10, respectively. A pair of second steady rollers 24 that sandwich the rail 1 are provided. The second steady rest roller 24 prevents the train 2 connected to the steady rest unit 3 via the connecting member 4 from swinging in the traveling direction. Further, the steady rest unit 3 is provided with a first steady rest roller 14 which comes into contact with both side surfaces of the lower rail portion 10 and rotates. By the first steady rest roller 14, the train 2
Shaking in the left-right direction orthogonal to the traveling direction is reliably prevented.

As described above, the connecting member 4 connects the electric train 2 and the steady rest unit 3, and the front and rear ends thereof absorb the impact when abutting against another carrying device. The dampers 26 and 27 are provided. Further, as shown in FIGS. 1 and 2, a hanger 5 is suspended from the connecting member 4 via a pair of supporting members 28 and 29 extending below the connecting member 4. Hanging position of the hanger 5, that is, a supporting member
The central positions p of 28 and 29 are provided so as to be closer to the train 2 on the connecting member 4. More specifically, the drive wheel 1 of the train 2 is moved from the central position p between the support members 28 and 29.
The distance t ₁ to the center of 8 (rotation axis) is
The second position of the steady rest unit 3 from the central position p between 8 and 29
Distance t _{2 to} the center (rotation axis) of steady rest roller 24
Is smaller than. As a result, when the work W is held on the hanger 5, most of the weight of the work W is applied to the drive wheels 18 of the train 2, and the adhesion between the drive wheels 18 and the upper surface of the rail 1 is increased. The drive wheel 18 is prevented from idling when the work is rotated at high speed, and the work W can be transported at high speed.

As shown in FIGS. 1 and 2, the hanger 5 has a plurality of holding arms 31 each having a locking portion 30 for locking the work W at its lower end, and the work held by the holding arms 31. Gripping means 3 for clamping and fixing W
2 is provided. The gripping means 32 includes a first gripping member 34 fixed to the main body 33, and a second gripping member 35 that moves toward the first gripping member 34 and clamps the work W between the first gripping member 34. The second gripping member 35 is moved by the moving means 36 provided in the main body 33.

When the work W is held on the hanger 5 and is carried by the carrying device of this embodiment, the train 2 is moved along the rail 1 by driving the drive wheels 18 by the drive motor 19. The work W is thus transported. At this time, since the central position p between the support members 28 and 29 for suspending the hanger 5 is suspended at a position closer to the train 2 of the connecting member 4, most of the load of the work W is increased. Since the drive wheel 18 is prevented from idling due to the increased adhesion between the drive wheel 18 and the rail 1, the work can be easily performed at a desired speed only by controlling the speed of the drive wheel 18. W can be transported, and the work W can be transported at high speed. In addition, the train 2 includes the first steady rest rollers 1 described above.
2, 13, 14 prevents the shake in the left and right direction,
In addition, the second steadying roller 2 of the steadying unit 3
Since the swinging in the front-rear direction is prevented by 4, the workpiece W can be accurately transported along the rail 1 without causing the swinging in the train 2 even if the workpiece W is rapidly accelerated or decelerated during transportation. it can.

[0020]

As is apparent from the above, according to the present invention, the hanger is suspended from the connecting member at the inner position between the train and the steady rest roller, and the suspension position of the hanger is determined. smaller than the distance between the distance between the axis of rotation of the driving wheel, the rotation axis of the retaining roller runout said with the hanging installation position
As a result, the weight applied from the hanger to the connecting member is
I tried to apply more to the drive wheel than the anti-stop roller
Thus, the wear of the drive wheel is reduced to increase the adhesion between the drive wheel and the rail, and the work can be conveyed at high speed without causing the drive wheel to idle even when the drive wheel is rotated at high speed. In addition, since the steady rest rollers that sandwich the upper and lower surfaces of the rails are connected to the train, the runout such as rocking in the front-rear direction during running is reliable even when the train is running at high speed or when performing rapid acceleration or deceleration. Therefore, the work can be conveyed with high precision along the rail.

[Brief description of the drawings]

FIG. 1 is an explanatory side view showing an embodiment of the present invention.

FIG. 2 is an explanatory front view of FIG. 1;

FIG. 3 is an explanatory side view showing a conventional transfer device.

[Explanation of symbols]

W ... Work, 1 ... Rail, 2 ... Train, 4 ... Connecting member, 5
... hanger, 18 ... drive wheel, 19 ... drive motor, 24 ... steady rest roller.

(72) Inventor Hidenobu Iwata 1-10-1 Shin-Sayama, Sayama-shi, Saitama Prefecture Honda Engineering Co., Ltd. (72) Shinpei Watanabe 1-10-1 Shin-Sayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. Inside the company (72) Inventor Tatsuo Kanno 1-10-1 Shin-Sayama, Sayama-shi, Saitama Prefecture Honda Engineering Co., Ltd. (72) In-house 1-chome 1-10, Shin-Sayama, Sayama City, Saitama Prefecture (56) References Actually open 3-8058 (JP, U) Actually open 58-56672 (JP, U)

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. A self-propelled electric train, comprising: a train that is self-propelled along a rail that extends along the direction in which a work is conveyed; In the above-mentioned electric train, the train includes drive wheels that rotate along the rails, and drive motors that drive the drive wheels, and a steady rest roller that sandwiches the upper and lower surfaces of the rails.
Direction of travel of the drive wheels from the train along the rails
The hanger is provided at a distance from the electric train via a connecting member extending rearward , and the hanger is suspended from the connecting member at a position inside the electric train and a steady rest roller. heavy wherein the distance between the rotational axis of the drive wheels, which is applied to the connecting member from the hanger as smaller than the distance between the rotational axis of the steady rest roller and the hanging installation position and
A self-propelled conveying device characterized in that a larger amount is applied to the drive wheel than to the steady rest roller .