JPH04308112A - Roller conveyor device - Google Patents

Abstract

PURPOSE:To obtain a roller conveyor by which the transfer of pallets can be always smoothly carried out by providing a feeding device for transmitting a prescribed transferring force to the pallets on the upstream side of an idling roller conveyor, and also by providing a braking device for applying a braking force to the pallet on the downstream side thereof, so that it will be well enough if a driving part is installed only in a part of the transfer route. CONSTITUTION:After a movable body on the transfer route 8 supported by an idling roller conveyor 7 has been positioned so as to be opposite to a feeding device 12, the feeding device 12 is operated to apply a large transferring force to a pallet 1, so that it can be transferred. At that time, the pallet 1 pushes and transfers the pallet that has preceded it and stops on the idling roller conveyor 7. On the downstream side of the transfer route 8, a braking device 14 is operated to apply a braking force to the pallet 1. Since the transferring force is larger than the braking force, in accordance with the difference, the pallet 1 on the downstream side is transferred in such a condition that braking action has been applied. Thus, the pallets on the idling roller conveyor 7 are transferred in a close pushing condition without causing a clearance between the front and rear ends of the pallets.

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 capable of supporting, conveying, and storing pallets.

0002

2. Description of the Related Art Conventionally, as this type of roller conveyor device, there have been provided a non-drive type in which a large number of idle rollers are arranged, and a drive type in which a drive device is interlocked and connected to each roller.

In the former non-drive type, the conveyance path is inclined and a stopper is provided at the end of the conveyance path, and the pallet is conveyed by sliding due to its own weight and is brought into contact with the stopper, thereby bringing the front and rear ends of the pallet into contact. By doing so, storage was performed sequentially. In the latter type of drive, each roller is forcibly rotated by a drive device to transport the pallet and brought into contact with a stopper, thereby bringing the front and rear ends of the pallet into contact with each other to sequentially store the pallet.

0004

[Problems to be Solved by the Invention] According to the former non-driving type of the conventional configuration described above, the pallet is moved along an inclined conveyance path, which causes problems when objects to be conveyed are placed on the pallet. Stable conveyance is achieved, and the stopper is subjected to a large collision force and load, making it impossible to cut out the pallet smoothly and accurately, which may also result in damage to the stopper. Furthermore, according to the latter type of drive, the drive device must be disposed along the entire length of the conveyance path, resulting in a large and complicated structure, and furthermore, noise is generated around the entire length of the conveyance path.

[0005] An object of the present invention is to provide a roller conveyor device in which the drive unit only needs to be installed in a part of the conveyance path, and furthermore, pallets can always be conveyed smoothly in a horizontal manner.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the roller conveyor device of the first invention is provided with an idling roller conveyor for supporting and conveying pallets, and is provided with an idling roller conveyor that supports and conveys pallets. , a feeding device is provided to transmit a conveying force to the pallet, and a braking device is also provided to apply a braking force to the pallet, and the feeding device is configured to apply a conveying force larger than the braking force by the braking device. are doing.

[0007] Furthermore, the roller conveyor device of the second invention includes:
The feeding device consists of a feeding roller that can freely come into contact with the side of the pallet, and a rotary drive device linked to this feeding roller, and the braking device consists of a braking roller that can come into contact with the side of the pallet, and a rotation drive device that is linked to the feeding roller. and a reverse rotation drive device interlocked with the roller, and the feed rotational force of the rotation drive device is set to be larger than the reverse feed rotation force of the reverse rotation drive device.

[0008]

[Operation] According to the structure of the first invention, after the movable body on the conveyance path supported by the idle roller conveyor is positioned opposite to the feeding device, the feeding device is caused to act on the pallet. , a large conveying force is applied to the pallet, so that the pallet can be conveyed on the conveying route. At this time, the pallets are conveyed by backing up a group of pallets that are stopped in advance on the idle roller conveyor.

At the lower end of the conveyance path, a braking force is applied to the pallet by applying a braking device to the pallet, and since the conveyance force is greater than the braking force here,
Depending on the difference, the lower pallets will be conveyed while receiving braking action, and therefore the pallet group on the idle roller conveyor will be conveyed in a densely pushed state without creating a gap between the front and rear ends. be done.

Further, according to the configuration of the second invention, after the movable body on the conveyance path supported by the idle roller conveyor is positioned opposite to the feed device, the feed roller is brought into contact with the side of the pallet. By forcibly rotating the feed roller using the rotary drive device in this state, a large conveyance force is applied to the pallet.

[0011] At the bottom of the conveyance path, the brake roller that is being rotated in reverse is in contact with the side of the pallet, so a braking force in the reverse conveyance direction is applied to this pallet, and here the feed rotational force is Since this is larger than the reverse feed rotational force, the brake roller is rotated toward the feed rotation side in accordance with the difference. As a result, the lower pallet is conveyed while being subjected to braking action.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a pallet with lower plate materials 3 on both sides of the lower part of the main body 2.
It has an upper plate material 4 on both sides of the upper part over the entire length in the longitudinal direction, and has a table 6 rotatable around a vertical axis 5 in the center of the upper part. The pallet 1 is placed on the idle roller conveyor 7 and becomes movable on the conveyance path 8.
is composed of a pair of left and right frames 9 and a large number of rollers 10 freely rotatably disposed between these frames 9.

At the top of the conveyance path 8, at a predetermined interval in the direction of the conveyance path 8, there are a first feed device 11 for carrying in and a second feed device 12 for main conveyance that transmits a conveyance force to the pallet 1.
A third
A feeding device 13 is provided, as well as a braking device 14 that applies a braking force to the pallet 1 a little better than the feeding device 13.

Next, details of each of the feeding devices 11 to 13 will be explained. These feeding devices 11 to 13 have a similar structure, and support frames 21 each having a gate shape when viewed from the side are erected from both sides of a base plate 20 that passes below the idling roller conveyor 7. Inside each of these support frames 21, horizontal shafts 22 extending in the left-right direction are disposed, and these horizontal shafts 22 are freely rotatably supported via bearings 23 on the base plate 20 side.

A lever 24 is fitted onto each of the horizontal shafts 22 through its base end so as to be relatively swingable.
A lower feed roller 26 is connected between the free ends of the rollers 4 and 4 via a bearing 25.
is arranged so that it can freely rotate. A pair of left and right large diameter portions 27 are formed on the lower feed roller 26, and these large diameter portions 27 support the pallet 1 via the lower plate material 3.

As a result, the lower feed roller 26 can freely swing up and down via the lever 24 around the horizontal axis 28 connecting both horizontal shafts 25, and is provided with a stroke-type swing drive device for swinging it up and down. are doing. This swing drive device is, for example, a pair of left and right cylinder devices 30, and its main body 3
1 is a connecting pin 33 attached to a bracket 32 from the base plate 20.
The tip of the piston rod 34 is connected via a connecting pin 36 to a bracket 35 extending rearward from the upper end of the lever 24.

A cover frame 40 is provided on the outside of one lever 24.
are integrated, and within this cover frame 40 is the horizontal shaft 22.
A drive gear 41 fixed to the lower feed roller 26 and a passive gear 42 fixed to the lower feed roller 26 are disposed, and both gears 41, 4
2 are interlocking with each other. A servo motor 43 with a reducer, which is an example of a rotational drive device, is mounted on the base plate 20.
An output shaft 44 taken out laterally outward from the servo motor 43 is connected to the one horizontal shaft 22 via a coupling 45. Note that the servo motor 43 applies a feed rotational force A to the lower feed roller 26.

A horizontal pin 46 in the left and right direction is provided through the upper part of the support frame 21, and an upper feed roller 47 facing the lower feed roller 26 is attached to the inner end of the horizontal pin 46 so as to freely rotate. ing. Note that the upper feed roller 47 is
The pallet 1 is received via the upper plate material 4. Furthermore, guide rollers 48 are disposed on the lower surface side of the upper part of the support frame 21 via vertical pins 49, and are capable of coming into contact with both sides of the main body 2 of the pallet 1.

The braking device 14 has a similar structure,
A lower braking roller 50 made of, for example, urethane, which can freely come into contact with and separate from the lower plate material 3 of the main body 2 from below; It is composed of a reverse rotation drive device 51 that provides a rotation speed, an upper braking roller 52 that can freely come into contact with the upper plate member 4 of the main body 2 from above, and the like. The reverse rotation drive device 51 is composed of a torque motor or the like, and its reverse rotational force B is set to be smaller than the rotational force A of the servo motor 43.

Next, the conveyance operation of the pallet 1 in the above embodiment will be explained. The pallet 1 fed to the top of the idle roller conveyor 7 is loaded by hand or the like so that its front end enters the first feeding device 11. Then, the pallet 1 is conveyed a little on the conveyance path 8 and transferred to the second main conveyance path.
It is passed to the feeding device 12. At this time, the cylinder device 30 in the second feed device 12 is retracted, causing the lever 24 to swing downward about the longitudinal axis 28, thereby moving the lower feed roller 26 relative to the upper feed roller 47 in the virtual position shown in FIG. They are spaced apart as shown by the lines. Therefore, the pallet 1 can be carried in without any problems, and both sides of the main body 2 of the pallet 1 are guided by the guide rollers 48 at that time.

After the conveyance, the lower feed roller 26 is moved closer to the upper feed roller 47 by an action opposite to that described above, and as shown by the solid line in FIG. While pressing the roller 26,
An upper feed roller 47 is brought into pressure contact with the upper plate material 4.

At this time, the servo motor 43 is being driven, and therefore the lower feed roller 26 is forced to rotate.
By bringing the main body 2 into pressure contact with the lower plate material 3, the conveyance force is applied to the pallet 1 by the feed rotational force A while the main body 2 is held between the upper feed roller 47 which is brought into pressure contact with the upper plate material 4, Therefore, the pallet 1 is transported C on the transport path 8. This pallet 1 backs up the pallet 1 group that is preceding and stopping. The feed amount of the pallet 1 by the second feed device 12 is detected by an encoder or the like, and when a predetermined feed amount is detected, the lower feed roller 26 is separated and the conveyance operation is stopped.

A braking device 14 applies a brake to the pallet 1 that has reached the bottom of the conveyance path 8. That is, when the conveyance operation of the pallet 1 by the second feeding device 12 is stopped, the cylinder device in the braking device 14 is retracted, so that the lower braking roller 50 is separated from the pallet 1.

[0024] In conjunction with the loading movement of the second feeder 12, the lower braking roller 50 is moved closer to the lower plate material 3 in the main body 2 by an action opposite to that described above, and at this time, the lower braking roller 50 is brought into pressure contact with the lower plate material 3 of the main body 2. 50 is rotationally driven in a direction opposite to the lower feed roller 26. That is, the lower brake roller 50 is forcibly rotated in the opposite direction by driving the torque motor.

Therefore, when the lower braking roller 50, which is being forcibly rotated, is brought into pressure contact with the lower surface of the lower plate material 3, a braking force in the reverse transport direction is applied to the pallet 1 due to the reverse feed rotational force B. Since the force A is larger than the reverse feed rotational force B, the lower braking roller 50 is rotated toward the feed rotation side in accordance with the difference, and the load at this time is absorbed by the torque motor.

As a result, the pallet 1 corresponding to the lower braking device 14 is conveyed while receiving the braking action, and therefore, the pallet 1 corresponding to the lower braking device 14 is transferred from the second feeding device 12 to the braking device 14.
Between them, a plurality of pallets 1 are arranged in a densely backed state without creating a gap between their front and rear ends. The braking action by the braking device 14 is stopped immediately after the second feeding device 12 stops conveyance. The pallet 1 pushed out from the braking device 14 by the above-mentioned push is carried out to the next process by the third pallet feeding device 13 for carrying out.

As shown in the above embodiment, each feeding device 1
By unitizing 1 to 13 and the braking device 14 using the base plate 20 as a substrate, it is easy to incorporate them into any location in the idling roller conveyor 7 or to easily remove them from the idling roller conveyor 7. Can be done.

In the above embodiment, in each of the feeding devices 11 to 13 and the braking device 14, only the lower feed roller 26 and the lower braking roller 50 are of the forced drive type, but the upper and lower sides are switched and the upper side is of the forced drive type. Alternatively, both the upper and lower sides may be of a forced drive type. Furthermore, only the lower feed roller 26 and the lower brake roller 50 are moved toward and away from each other.
Both brake rollers 50 and 52 may be of the approach-separation type.

Further, in the above embodiment, both feed rollers 26,
47 and both braking rollers 50 and 52 are brought into contact with the main body 2 of the pallet 1 from above and below and held therebetween.
This may be of a type in which the feed roller and the brake roller are brought into contact with the side surface of the main body 2 of the pallet 1 from the lateral direction.

In addition to the braking device 14 that rotates the braking rollers 50 and 52 in the reverse direction, the embodiment of the first invention also includes a forward rotation driving device that has a certain resistance to the running force as described above. It may be in any adopted format.

[0031]

Effects of the Invention According to the first aspect of the present invention having the above structure, the pallet group supported horizontally on the idling roller conveyor due to the difference caused by the canceling effect between the conveying force by the feeding device and the braking force by the braking device. can be efficiently conveyed in a tightly backed state without creating a gap between the front and rear ends.

[0032] In this case, the feeding device and the braking device need only be disposed at predetermined locations on the conveyance path, which makes it possible to simplify the structure and reduce the number of noise sources. Furthermore, the feeding device and the braking device can be made into a unit, and can be easily installed at any location in the idling roller conveyor or removed from the idling roller conveyor.

Further, according to the second aspect of the present invention having the above-mentioned configuration, the conveying force of the conveying device and the braking force of the braking device in the opposite conveying direction cancel each other out. It is possible to efficiently transport a group of pallets in a tightly backed state without creating a gap between the front and rear ends.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and is a schematic side view of the entire device.

FIG. 2 is a schematic plan view of the entire device.

FIG. 3 is a side view of the feeding device section.

FIG. 4 is a partially cutaway front view of the feeding device section.

FIG. 5 is a plan view of the feeding device section.

[Explanation of symbols]

1 Pallet 2 Main body 3 Lower plate material 4 Upper plate material 7 Idle roller conveyor 8 Conveyance path 11 First feed device 12 Second feed device 13 Third feed device 14 Braking device 20 Base plate 24 Lever 26 Lower feed roller 28 Horizontal axis 30 Cylinder device (swing drive device) 27A
Servo motor (rotary drive device) 43
Servo motor (rotary drive device) 47 Upper feed roller 48 Guide roller 50 Lower brake roller 51 Reverse rotation drive device 52 Upper brake roller A Reverse feed rotational force B Feed rotational force

Claims (2)

[Claims] Claim 1: An idling roller conveyor is provided to support and convey the pallet, and a feeding device is provided at the upper end of the conveyance path by the idling roller conveyor to transmit conveying force to the pallet, and at the lower end, a feeding device is provided to transmit a conveying force to the pallet. A roller conveyor device, characterized in that a braking device for applying power is provided, and the feeding device is configured to apply a conveying force larger than the braking force by the braking device. [Claim 2] The feeding device includes a feeding roller that can freely come into contact with the side of the pallet, and a rotation drive device that is linked to the feeding roller, and the braking device includes a braking device that can freely come into contact with the side of the pallet. Claim 1, wherein the roller comprises a roller and a reverse rotation drive device linked to the brake roller, and the feed rotational force of the rotation drive device is set to be larger than the reverse feed rotation force of the reverse rotation drive device. 1. The roller conveyor device according to 1.