JPH04310463A - Movable body conveying mechanism - Google Patents

Abstract

PURPOSE:To provide a movable body conveying mechanism capable of conveying the movable body smoothly without disturbing support members by constituting so that a feeding device for transmitting a running force to the movable body produces the running force greater than a brake force produced by a brake device. CONSTITUTION:A movable body 1 is placed on a specified path 7 opposite a feeder 10. Feed rollers 29A and 29B are brought into contact with upper and lower sides of the movable body so as to sandwich the movable body. A large running force is given to the movable body by forcing the feed rollers to rotate by means of rotary drivers 27A and 27B so that the movable body is conveyed on the specified path. In that case, the movable body pushes forward a preceding movable body which has been at rest. Since a brake force is applied to a movable body on the downstream side by means of a brake device 13, the downstream movable body is conveyed under a brake force. The movable body group is conveyed while no gaps are produced between their front and rear ends.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a movable body conveyor used to convey non-driven movable bodies on a fixed path, such as a trolley device that can freely travel on the floor side or a trolley device that can freely travel on the ceiling side. It is related to equipment.

0002

2. Description of the Related Art Hitherto, a structure as shown in, for example, Japanese Unexamined Patent Application Publication No. 2-209309 has been provided for transporting a non-driven trolley along a fixed route.

[0003] In this conventional configuration, a movable body conveyance device is provided at the upper end of a fixed path along which the movable body can travel freely, and a brake device is provided at the lower end. And the movable body transport device,
It consists of a pair of left and right feed rollers that can freely come into contact with the side surfaces of the movable body, and a rotational drive device that interlocks with these feed rollers and applies a feed rotational force to the feed rollers. In addition, the brake device is composed of a pair of left and right brake rollers that can freely come into contact with the side surfaces of the movable body, a torque motor that is interlocked with these brake rollers and applies reverse rotational force to the brake roller. is set larger than the reverse feed rotational force.

According to such a conventional configuration, both feed rollers are forcibly rotated in the feed rotation direction by both rotational drive devices, and since the feed rollers are in contact with both sides of the movable body, the movable body This gives a large propulsion force to the movable body, thereby making it possible to transport the movable body along a fixed path. In this case, the movable body backs up the movable body group that is stopped in front of it and conveys it.

[0005] At the bottom of the fixed path, the brake rollers being rotated in reverse are in contact with both sides of the movable body, so a propulsive force in the reverse direction of conveyance acts on this movable body, and here the feed is stopped. Since the rotational force is larger than the reverse rotational force, the brake roller is rotated toward the forward rotation side in accordance with the difference, and the load at that time is absorbed by the torque motor. As a result, the lower movable bodies are conveyed while being braked, and therefore the movable body group is conveyed in a tightly backed state without creating a gap between the front and rear ends.

[0006] The main body of the movable body basically consists of a rectangular frame body and a work floor plate disposed on the frame body, and the frame body is long in the front and back and has a pair of left and right sides. It is composed of a frame, a front frame that connects the front ends of the side frames, and a rear frame that connects the rear ends of the side frames.

[0007]

[Problems to be Solved by the Invention] According to the above-mentioned conventional structure, a large contact force of the feed roller acts inward against the outer surfaces of both side frames, and the large contact force causes both side frames to turn inward. As a result, the conveyance by the rotary drive device cannot be carried out smoothly, and furthermore, the support for the conveyed object becomes disordered, making it impossible to support it accurately.

[0008] To deal with this, a plurality of reinforcing frames are arranged between the middle parts of both side frames to ensure the overall strength. It takes time and effort to manufacture, and the amount of materials increases, making the whole thing expensive, and the weight of the movable body increases.

It is an object of the present invention to provide a movable body transporting facility that can simplify the structure of a movable body and reduce its weight, can always transport the movable body smoothly, and does not cause disturbance of the support. It is in the point of doing.

0010

[Means for Solving the Problems] In order to achieve the above object, the movable body conveyance equipment of the first invention is provided with a feeding device that transmits running force to the movable body on a fixed path along which the movable body can travel freely. At the same time, a braking device is provided below to apply a braking force to the movable body, and the feed device is interlocked with a pair of upper and lower feed rollers that can freely come into contact with the upper and lower sides of the movable body, and at least one of these feed rollers. It consists of a rotary drive device,
The feeding device is configured to provide a running force greater than the braking force provided by the braking device.

Further, the movable body conveying equipment of the second invention includes a braking device that is interlocked with a pair of upper and lower brake rollers that can freely come into contact with the upper and lower surfaces of the side portion of the movable body, and at least one of these brake rollers, and It is composed of a reverse rotation drive device that applies a reverse rotation force to the roller, and the rotation force of the rotation drive device is set to be larger than the reverse rotation force of the reverse rotation drive device.

0012

[Operation] According to the configuration of the first aspect of the present invention, after the movable body is positioned facing the feeding device on a fixed path, both the feed rollers are brought into contact with the upper and lower surfaces of the side portions of the movable body and held therebetween. By forcibly rotating the feed roller using the rotary drive device, a large running force is applied to the movable body, thereby making it possible to convey the movable body along a fixed path. At that time, the movable body
This means that the movable bodies that are stopped in front of each other are backed up and transported.

[0013] Since the braking force is applied to the movable body by the braking device at the lower end of the fixed path, the movable body at the lower position is transported while receiving the braking action, and therefore the movable body group is conveyed in a tightly backed state without creating a gap between the front and rear ends.

[0014] Here, the main body of the movable body is composed of a rectangular frame body and a working floor plate disposed on the frame body, and is elongated in the front and rear and is attached to a pair of left and right side frames. The feed rollers may be operated by vertically clamping them.

Further, according to the configuration of the second invention, at the lower end of the fixed path, the brake roller, which is being rotated in reverse, is held in contact with the upper and lower surfaces of the side part of the movable body. A running force in the reverse conveyance direction acts on the body, and since the feed rotational force is larger than the reverse feed rotational force, the brake roller is rotated in the feed rotation side in accordance with the difference. As a result, the lower movable bodies are conveyed while receiving the braking action, and therefore the movable body group is conveyed in a tightly backed state without creating a gap between the front and rear ends.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a cart which is an example of a movable body and can freely run on the floor side, and has a plurality of wheels 3 at the bottom of a main body 2 so as to be freely rotatable. Here, the main body 2 consists of a rectangular framework 4 and a work floor plate 5 disposed on the framework 4. The frame body 4 is constructed by a pair of left and right side frames 4a that are long in the front and back, a front frame 4b that connects the front ends of these side frames 4a, and a rear frame 4c that connects the rear ends of the side frames 4a. It consists of

The trolley 1 is placed on a pair of left and right rails 6 via wheels 3, and is thus able to run freely on a fixed route 7. At the starting end of this constant path 7, a feeding device 10 for carrying in and a feeding device 11 for transmitting running force to the trolley 1 for main transportation are arranged at a predetermined interval in the direction of the constant path 7,
At the end of the constant path 7, a feed device 12 for carrying out is disposed, and a braking device 13 for applying a braking force to the cart 1 is disposed a little better than this. Note that each of the feeding devices 10 to 12 and the braking device 13 are arranged symmetrically in pairs on the left and right.

Next, details of the feeding devices 10, 11, and 12 will be explained. These movable body feeding devices 10, 11, and 12 have a similar structure, and a support frame 21 is erected from a base plate 20 disposed outside the rail 6. The horizontal shafts 23A, 23 in the left and right direction are attached to the inner surface of the support frame 21 from two places, upper and lower, via attachment members 22A, 22B, respectively.
B protrudes inward, and horizontal shafts 23A, 23B
support members 25A, 25 via bearings 24A, 24B.
B is attached to be vertically swingable around horizontal axes 26A and 26B.

The support members 25A, 25B are equipped with servo motors 27A, 27A, and 27A, each equipped with a speed reducer, which is an example of a rotary drive device.
27B is arranged, and these servo motors 27A, 27B
For example, feed rollers 29A and 29B made of urethane are fixed to output shafts 28A and 28B taken out laterally inward from the shaft. Note that the servo motors 27A, 27B apply a feed rotational force A to the feed rollers 29A, 29B.

The supporting members 25A, 25B integrally have brackets 30A, 30B extending forward, and a stroke-type swinging drive device for swinging both the supporting members 25A, 25B is disposed between these brackets 30A, 30B. are doing. This swing drive device is, for example, a cylinder device 31, a main body 32 of which is attached to a lower bracket 30B via a connecting pin 33, and a piston rod 34.
The tip of the bracket 30A is connected to the upper bracket 30A via a connecting pin 35.

Therefore, by operating the cylinder device 31, both the support members 25A, 25B are aligned with the horizontal axes 26A, 26.
Both feed rollers 29A, 29B are oscillated up and down around B.
can be moved toward or away from each other. At that time, in order to restrict the maximum approach position, the support members 25A, 25B
The stopper bodies 36A and 36B are arranged consecutively from the
Stopper bodies 37A and 37B, with which these stopper bodies 36A and 36B can freely abut, are provided on the support frame 21 so that their positions can be adjusted.

The braking device 13 has a similar structure,
A pair of upper and lower brake rollers 40A, 40B made of, for example, urethane, each of which can freely come into contact with and separate from the side frame 4a of the main body 2 from the vertical direction; ,40
a reverse rotation drive device 41A that applies reverse rotational force B to B;
41B etc. Note that the reverse rotation drive device 41A
, 41B consists of a torque motor, etc., and its reverse feed rotational force B is equal to the feed rotational force A of the servo motors 27A and 27B.
It is set smaller than.

[0023] Each of the feeding devices 10 to 12 and the braking device 13
Guide rollers 45 that can come into contact with both sides of the main body 2 of the truck 1 are disposed at the installation portion. Next, the transportation work of the trolley 1 in the above embodiment will be explained.

The cart 1 supplied to the starting end of the fixed path 7 is pushed in by hand or the like so that its front end enters the feeding device 10. Then, the trolley 1 is conveyed for a short distance on a fixed path 7 and is delivered to a main conveyance feeding device 11. At this time, the cylinder device 31 in the feeding device 11 is contracted,
Support members 25A, 25B are swung outwardly relative to each other about longitudinal axes 26A, 26B, thereby causing feed rollers 29A, 2
9B are spaced apart from each other as shown by the imaginary lines in FIG. Therefore, the carriage 1 can be carried in without any hindrance, and at that time, both sides of the body 2 of the carriage 1 are placed on the guide rollers 45.
will be guided to.

After the conveyance is carried in, both feed rollers 29A and 29B are moved closer to each other by an action opposite to that described above and brought into pressure contact with the upper and lower surfaces of the side frame 4a as shown by the solid line in FIG. The rollers 29A, 29B are rotationally driven by servo motors 27A, 27B. Therefore, by bringing the forcibly rotated feed rollers 29A and 29B into pressure contact with the upper and lower surfaces of the side frame 4a, the rotational force A of the feed provides a running force to the trolley 1, so that the trolley 1 moves along a fixed path. 7 and transported C. This trolley 1 is
This will support the first group of bogies that are stopped in front.

The amount of feed of the trolley 1 by the feeder 11 is detected by an encoder or the like, and when a predetermined amount of feed is detected, the feed rollers 29A, 29B are separated and the conveyance operation is stopped. A braking force is applied by a braking device 13 to the bogie 1 that has reached the terminal end of the fixed route 7. That is, when the conveyance operation of the trolley 1 by the feeding device 11 is stopped, the cylinder device in the braking device 13 is contracted, so that the braking rollers 40A and 40B are spaced apart from each other.

[0027] In conjunction with the loading movement of the feeding device 11,
The braking rollers 40A, 40B are moved closer to each other by the opposite action to that described above, and brought into pressure contact with the upper and lower surfaces of the side frame 4a of the main body 2. At this time, the braking rollers 40A, 40B are different from the feed rollers 29A, 29B. It is rotated in the opposite direction. That is, both brake rollers 40A and 40B are forcibly rotated in opposite directions by driving the torque motor.

Therefore, when the forcedly rotated brake rollers 40A, 40B are brought into pressure contact with the upper and lower surfaces of the side frame 4a,
The reverse feed rotational force B causes a propulsive force in the reverse transport direction D to act on the cart 1, but since the feed rotational force A is larger than the reverse feed rotational force B, the braking roller 40A and 40B are rotated to the feed rotation side, and the load at that time is absorbed by the torque motor.

As a result, the cart 1 corresponding to the lower braking device 13 is transported in a state where it is subjected to the braking action. However, they are closely aligned in a backed-up state without creating a gap between the front and rear ends. The braking operation by such a braking device 13 is performed by the feeding device 1.
The conveyance is stopped immediately after the conveyance stop in step 1. The cart 1 pushed out from the braking device 13 by the above-mentioned push is carried out to the next process by the feeding device 12.

As described above, the main body 2 of the trolley 1 is composed of a rectangular frame 4 and a working floor plate 5 disposed on the frame 4, and a pair of long left and right panels in the front and rear. By applying the feed rollers 29A, 29B and the braking rollers 40A, 40B to the side frame 4a by holding them in the vertical direction, contact force from the left and right directions does not act on the frame body 4,
Therefore, even though it does not have a reinforcing frame etc.
The frame body 4 is not deformed by the contact force.

In each of the feeding devices 10 to 12, between the corresponding servo motors 27A and 27B, and in the braking device 13, the corresponding reverse rotation drive devices 41A and 41B are connected.
are electrically synchronized.

In the above embodiment, all of the feed rollers 29A, 29B and brake rollers 40A, 40B in the feed devices 10 to 12 and the brake device 13 are of the forced drive type.
For example, the lower feed roller 29B and the brake roller 40B are forcedly driven, and the upper feed roller 29B and the brake roller 40B are forcedly driven.
9A and the brake roller 40A may be of an idling type.

Further, in the above embodiment, the feed rollers 29A,
29B and the brake rollers 40A and 40B are all of the approach-separation type, but this is because, for example, the lower feed roller 29
B and the brake roller 40B may be of the approaching/separating type, and the upper feed roller 29A and the brake roller 40A may be of the fixed type.

Further, in the above embodiment, the movable body is the truck 1 that runs on the floor, but this may be a trolley device (such as a truck type) that is supported and guided by a ceiling rail. In addition, as an embodiment of the first invention, in addition to a type in which the brake rollers 40A and 40B are rotated in reverse as the brake device 13,
It may be of a type that employs a rotational drive device in the forward direction that has a certain resistance to the aforementioned running force.

[0035]

Effects of the Invention According to the first aspect of the present invention having the above-mentioned structure, the movable body group can be moved to reduce the gap between the front and rear ends due to the difference caused by the canceling effect between the traveling force in the conveying direction by the feed device and the braking force by the brake device. It is possible to efficiently convey the material in a densely backed state without causing any problems.

At this time, the feeding device applies a large running force to the movable body by sandwiching both feed rollers in contact with the upper and lower sides of the movable body, so that the main body of the movable body is moved forward and backward into a long length. It can be constructed from a rectangular frame body having a pair of left and right side frames and a work floor plate placed on this frame body, and the reinforcing frame etc. can be omitted, simplifying the structure of the movable body and reducing its weight. And it can be provided at low cost. Furthermore, contact forces from the left and right directions do not act on the frame body, and the frame body is not deformed by the contact force, so that the movable body can always be transported smoothly, and furthermore, the support equipment is not disturbed. There will be no.

Further, according to the configuration of the second invention, the movable body group is moved between the front and rear ends by the difference caused by the canceling effect between the traveling force in the conveying direction by the feeding device and the braking force in the reverse conveying direction by the braking device. It is possible to efficiently convey the material with close support without creating any gaps between the materials.

[Brief explanation of the drawing]

FIG. 1 shows one embodiment of the present invention and is a side view of a feeding device section.

FIG. 2 is a partially cutaway front view of the feeding device section.

FIG. 3 is a plan view showing the relative relationship between the movable body and the feeding device section.

FIG. 4 is a front view showing the relative relationship between the movable body and the feeding device section.

FIG. 5 is a schematic plan view of the entire device.

[Explanation of symbols]

1 Dolly (movable body) 2 Main body 4 Frame body 4a Side frame 5 Work floor plate 7 Fixed path 10 Feeding device 11 Feeding device 12 Feeding device 13 Braking device 21 Support frame 25A Support member 25B Support member 26A Horizontal axis center 26B Horizontal axis center 27A Servo motor (rotary drive device) 27B
Servo motor (rotary drive device) 29A Feed roller 29B Feed roller 31 Cylinder device (swing drive device) 40A
Braking roller 40B Braking roller 41A Reverse rotation drive device 41B Reverse rotation drive device 45 Guide roller A Reverse feed rotational force B Feed rotational force

Claims (2)

[Claims] 1. A feeding device for transmitting running force to the movable body is provided at the upper end of a fixed path along which the movable body can freely run, and a braking device for applying braking force to the movable body is provided at the lower end,
The feeding device includes a pair of upper and lower feeding rollers that can freely come into contact with the upper and lower surfaces of the side portion of the movable body, and a rotational drive device that is linked to at least one of these feeding rollers, and the feeding device is configured by the braking device. A movable body conveyance facility characterized in that it is configured to provide a running force greater than a braking force. 2. The braking device includes a pair of upper and lower braking rollers that can freely come into contact with the upper and lower surfaces of the side portion of the movable body, and a reverse roller that is interlocked with at least one of these braking rollers and that applies reverse rotational force to the braking roller. 2. The movable body conveying equipment according to claim 1, further comprising a rotary drive device, and wherein the feed rotational force of the rotation drive device is set to be larger than the reverse feed rotational force of the reverse rotation drive device.