JPH04343649A - Conveying facility using self-propelled bogie - Google Patents

Abstract

PURPOSE:To make the whole structure simple and inexpensive and stably support a pallet by forming the upper face of a self-propelled bogie supported on a traveling rail into a pallet support face, and providing pallet stations with support sections of ring bodies and the moving device of the pallet. CONSTITUTION:A self-propelled bogie 20 supported on a traveling rail 1 and travelable on a fixed path is provided, its upper face is formed into the support face 35 of a pallet 40, and ring bodies 43 rotatable in the perpendicular direction to the fixed path are provided on the lower face of the support face 35 of the pallet 40. Multiple pallet stations 45 having ring body support 48 with the same level as the support face 35 on the side of the fixed path are formed in the direction of the fixed path, relay members 50 faced to the ring bodies 43 from below and made the same level as the support face 35 when lifted are liftably provided on both sides of the fixed path in front of the pallet stations 48, and the pallet 40 is moved between the self-propelled bogie 20 and the pallet stations 48 by a moving device 60.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention has a self-propelled trolley that is supported and guided by rails laid in a factory and can travel on a fixed path, and the self-propelled trolley transports pallets such as jigs. This relates to transportation equipment that uses self-propelled carts.

0002

2. Description of the Related Art Conventionally, this type of equipment has been provided with a configuration as shown in, for example, Japanese Unexamined Patent Publication No. 172451 of 1986.

[0003] In this conventional type, a bogie is supported by a pair of left and right rails via wheels, and a drive device is interlocked with one of the wheels, so that the bogie can run freely on a fixed route. A group of support rollers that support the pallet for the jig so that it can move freely in a direction perpendicular to the fixed path are arranged on the top of the trolley, as well as lock pins that position the pallet and apply force to move the pallet. A fork-type movable body is provided.

[0004] A plurality of pool portions each having a support roller group to which the support roller group can be freely connected are formed on one side of the fixed path. In addition, a setup device and a processing device are arranged on the other side of the fixed path.

[0005] According to this conventional type, a cart placed on a rail via wheels travels along a fixed path by forcibly rotating the wheels using a drive device. By applying a moving force to the pallet using a movable body, the pallet is transferred between the cart and the pool section, setup equipment, and processing equipment. At that time, the pallet moves on a group of supporting rollers. do.

[0006]

[Problems to be Solved by the Invention] According to the above-mentioned conventional type, a large number of support rollers are provided in each of the pool section, setup device, processing device, and truck, making the overall configuration complicated and expensive. Become. Furthermore, if a mistake occurs in the locking operation of the lock pin, the pallet on the support roller group will easily fall off due to vibrations during traveling.

[0007] An object of the present invention is to provide a transport facility using a self-propelled cart which can provide a simple and inexpensive overall structure and can stably support pallets on the cart.

[0008]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the transportation equipment using a self-propelled cart of the present invention is provided with a self-propelled cart that is supported by a traveling rail and can freely travel on a fixed route,
The upper surface of this self-propelled cart is formed as a supporting surface of a pallet, and the lower surface of the pallet that is not supported by the supporting surface is provided with a plurality of wheels that can freely rotate in a direction perpendicular to the fixed path. A plurality of pallet stations having wheel support parts at the same level as the support surface are formed on the sides in the direction of a certain path, and in front of each pallet station and on both sides of the certain path, facing the wheel body from below. In addition, a relay member is provided which can be raised and lowered to be at the same level as the support surface, and a moving device is provided to move the pallet between the self-propelled cart and the pallet station.

[0009]

[Operation] According to the structure of the present invention, when the self-propelled cart is traveling, the pallet is stably supported by the frictional force because its lower surface is placed on the support surface and is in surface contact with the support surface. No side slipping or falling off will occur. By lowering the relay member, the self-propelled cart can run in front of the pallet station group without causing the wheel of the pallet to collide with the relay member or the like.

When delivering a pallet on a self-propelled cart to a pallet station, the self-propelled cart is first stopped in front of the target empty pallet station. Next, the relay member is raised and brought into contact with the wheel from below, and the pallet is lifted via the wheel. The upward movement of the relay member is stopped when its upper surface becomes flush with the support surface.

[0011] In this state, the moving device is operated to apply a pulling force to the pallet. As a result, the pallet has a wheel body on one side that rolls from the relay member to the wheel support part, and a wheel body on the other side that rolls from the relay member to the support surface, the relay member, and the wheel support part. Then, it will be pulled into the pallet station.

[0012] In order to load pallets onto an empty self-propelled cart, the self-propelled cart is stopped in front of the target actual pallet station, and then the pallets in the pallet station are loaded by the moving device in the reverse operation to the above. This can be done by applying pushing force.

[0013]

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 pair of left and right running rails, each of which is fixed on a pedestal 3 via a mounting member 2, etc., and the parallel interval is defined by a U-shaped connecting member 4 provided between opposing inner surfaces.
maintained by. Covers 6 are connected to the upper portions of the inner surfaces of both running rails 1 via support brackets 5 on opposing sides. Here, the upper surfaces of the traveling rail 1 and the cover 6 are flush with each other, and a slit 7 of a predetermined width is formed between the free ends of the cover 6.

A guide rail 10 is provided below the slit 7 between the running rails 1.
is fixed by the connecting member 4. A rack 11 facing one of the running rails 1 is attached to the upper end of this guide rail 10, and a detection plate 1 for high-speed cutting is attached to the lower part.
2 is installed. A power supply device 14 is disposed on the inner surface of one of the running rails 1 via a bracket 13 or the like.

Reference numeral 20 denotes a self-propelled trolley, and wheels 22 provided at four locations at the bottom of its main body 21 are supported by the traveling rail 1. Collision prevention sensors 23 are provided on each of the front and rear surfaces of the main body 21 to stop the self-propelled trolley 20 by a detection operation, and a travel drive device (such as a motor) is provided at the center in the left-right direction and in the middle in the front-rear direction. 24 are provided. The traveling drive device 24, the collision prevention sensor 23, and the like are connected to a control device 25 provided in the main body 21.

A downward drive shaft 26 from the travel drive device 24 projects below the cover 6 through the slit 7, and a pinion 27 that meshes with the rack 11 is attached to the lower end. A bracket 28 that passes through the slit 7 is vertically installed from the lower part of the main body 21, and this bracket 28 is divided into front and rear portions with respect to the drive shaft 26. A horizontal base plate 29 is attached between the lower ends of the bracket 28 , and a plurality of guide rollers 30 that can freely come into contact with both sides of the guide rail 10 are attached to the lower surface of the base plate 29 . The vehicle can run freely on a fixed route 8.

The base plate 29 is provided with a detection device 31 for high-speed cutting that can correspond to the detection plate 12 and a detection device 32 for fixed position detection, and these detection devices 31 and 32 are connected to the control device 25. is connected to. The detection plate 15 to which the detection device 32 for detecting the fixed position can be freely adapted is provided on the other traveling rail 1 side. Further, the base plate 29 is provided with a current collector 33 that is slidably in contact with the power supply device 14 .

The upper surface of the main body 21 is flat and forms a support surface 35 of the pallet 40. and support surface 3
A positioning pin 36 of the pallet 40 is erected from the center of the pallet 40, and a positioning hole 41 into which the positioning pin 36 can be inserted is formed in the center of the pallet 40 in the vertical direction.

The pallet 40 is shaped like a flat box, and the width of the supported surface 42 formed by its lower surface (width in a direction perpendicular to the constant path 8) is greater than the width of the supporting surface 35 in the same direction. It has also been made longer. On the side of the supported surface 42 of the pallet 40 that is not supported by the support surface 35, wheels 43 are provided at the four corners thereof, and these wheels 43 are configured to freely rotate in the width direction described above. The jig 38 can be placed on the pallet 40, and its placement posture is maintained by a fixture (not shown). Moreover, for the jig 38,
For example, workpieces such as parts can be attached and detached.

The constant path 8 is formed into an elliptical endless shape, and pallet stations 45 are arranged on both sides of one straight section.
A plurality of are provided in the direction of the constant path 8. This pallet station 45 includes a plurality of legs 46 erected from the pedestal 3, the above-mentioned widthwise connecting body 47 fixed between the upper ends of the legs 46, and a rail-like structure fixed to the upper surface of the connecting body 47. This wheel support part 48 is set at the same level as the support surface 35, and two sets form the pallet station 45.

In front of each pallet station 45 and on both sides of the fixed path 8, a relay member 50 is provided which faces the wheel body 43 from below and is movable up and down to be at the same level as the support surface 35 when raised. . In other words, constant path 8
Brackets 51 are erected from the pedestal 3 on both sides, and a vertical guide cylinder 52 is provided at the upper part of the opposing inner surfaces of the brackets 51. This guide tube 5
An elevating cylinder device 54 is provided between the lower end of the elevating body 53 guided by the elevating body 2 and the lower part of the bracket 51, and the relay member 50 is fixed to the upper end of the elevating body 53.

Each pallet station 45 is provided with a moving device 60 for moving the pallet 40 between the self-propelled cart 20 and the pallet station 45. That is, a swinging rail 61 is arranged between the two wheel support parts 48, and this swinging rail 61 can freely swing up and down via a support shaft 62 provided in the inner part of the pallet station 45 in parallel to the fixed path 8. A cylinder device 63 is provided on the bracket 51 to be attached and swing the cylinder device 63 .

The movable body 64 supported and guided by the swing rail 61 is movable by a rodless cylinder (not shown), and a locking pin 65 is inserted from the top surface of the movable body 64.
will be erected. Note that the pallet 40 is formed with a locking hole 44 through which a locking pin 65 can be freely engaged and removed from below.

On the side of another straight section of the constant path 8,
A processing device 70 for receiving the pallet 40 and processing the workpiece of the jig 38 is provided. Next, the operation of the above embodiment will be explained. The self-propelled trolley 20 placed on the traveling rail 1 via each wheel 22 is driven along a fixed route 8 by activating the travel drive device 24 in response to a travel instruction and forcing the pinion 27 to rotate. That is, since the pinion 27 is engaged with the rack 11, the rotation of the pinion 27 is converted into reliable running force, and since it is guided to the guide rail 10 via the guide roller 30,
The self-propelled trolley 20 travels on a fixed route 8 at a predetermined speed.

During normal running, when the detection plate 12 is detected by the detection device 31, the high speed is cut off and the speed is shifted to deceleration.Then, when the plate extension plate 15 is detected by the detection device 32, the self-propelled truck 20 It is stopped at a fixed position facing the pallet station 45 and the processing device 70. and constant path 8
When an obstacle such as a person enters the vehicle, a collision prevention sensor 23 detects the obstacle and brings the self-propelled trolley 20 to an emergency stop. Furthermore, the traveling is carried out by the current collector 33 slidingly contacting the power supply device 14, so that the control device 25 of the self-propelled trolley 20 is operated from the ground side.
This is done smoothly by sending and receiving signals to and from the terminal, as well as supplying power.

During the above-mentioned traveling, the pallet 40
Since the supported surface 42, which is the lower surface thereof, is placed on the support surface 35 and is in surface contact with the support surface 35, it is stably supported by the frictional force and does not cause lateral displacement or falling off. Furthermore, since the positioning pin 36 is fitted into the positioning hole 41, lateral displacement can be more strongly prevented.

When the self-propelled cart 20 travels in front of the pallet station group 45, the relay member 50 is in the lowered position as shown in FIG.
The movable body 64 is also in the lowered position. Therefore, the self-propelled cart 20 can travel without causing the wheels 43 of the pallet 40 to collide with the relay member 50, the movable body 64, or the like.

When delivering the pallet 40 on the self-propelled cart 20 to the pallet station 45, the self-propelled cart 20 is first stopped in front of the target empty pallet station 45. At this time, the wheel body 43 is located above the relay member 50, and the locking hole 44 is located above the locking pin 65.

Next, the relay member 50 is raised by operating the cylinder device 54. Then, the relay member 50 becomes the ring body 43
from below, and the pallet 40
perform lifting. As shown in FIG. 2, the upward movement of the relay member 50 is stopped when the upper surface of the relay member 50 becomes flush with the support surface 35, and at this time the positioning pin 36 is in the extracted state.

In this state, the swing rail 61 is swung upward by the cylinder device 63, and the locking pin 65 of the movable body 64 is
After engaging with the locking hole 44, the movable body 64 is moved to the inner side to apply a pulling force to the pallet 40. As a result, the pallet 40 has one ring body 43 connected to the relay member 5.
0 to the wheel body support part 48, and the wheel body 43 on the other side
The pallet station 4 rolls from the relay member 50 to the support surface 35, the relay member 50, and the wheel support portion
You will be drawn into 5.

The empty self-propelled cart 20 can travel, and at the pallet station 45 where the pallet 40 is pulled in, by lowering the relay member 50 and lowering the swing rail 61, another self-propelled cart 20 can be moved. The running truck 20 can pass forward without causing the wheel body 43 of the pallet 40 to collide with the relay member 50, the movable body 64, etc.

[0032] Pallet 4 for empty self-propelled cart 20
0 loading can be carried out by stopping the self-propelled cart 20 in front of the target actual pallet station 45 and then performing the reverse operation to that described above. At that time, the pallets 40 in the pallet station 45 are 64 and the like onto the self-propelled trolley 20.

In the above embodiment, the self-propelled trolley 20 is supported by two running rails 1, but it may also be supported and guided by a monorail, or a traveling drive device using a motor may be used. 24 has been shown, but this may also be a linear type. Furthermore, although a format in which the jig 38 is supported as the pallet 40 has been shown, it may also be in a format in which, for example, parts for automobiles are directly supported.

[0034] In the above embodiment, the fixed route 8 in the shape of an endless ellipse is shown, but this may be a linear route with an end in which the self-propelled cart 20 travels back and forth, or the route with an end may be set as one-way. A working path may be formed above it and a processing device may be provided. Furthermore, although the pallet stations 45 are arranged on both sides of the constant path 8, they may be arranged only on one side. The positioning pin 36 may be raised and lowered by a cylinder device, or the positioning pin 36 may be omitted.

[0035]

Effects of the Invention According to the configuration of the present invention described above, it is only necessary to provide a small number of wheels on the pallet and provide a relay member and a moving device at each pallet station. The entire structure can be constructed more easily and at a lower cost than the other structure. In addition, when the self-propelled cart is running, the lower surface of the pallet is placed on the support surface and is in surface contact with the support surface, so the pallet can be stably supported by the frictional force, and no side shifting or falling off will occur.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a longitudinal sectional front view of a pallet station and a self-propelled cart during travel.

FIG. 2 is a longitudinal sectional front view of the pallet station and the self-propelled cart at the time of pallet delivery.

FIG. 3 is a front view of the main parts of the pallet station section.

FIG. 4 is a longitudinal sectional front view of the traveling rail section and the self-propelled truck during the same traveling period.

FIG. 5 is a schematic plan view showing the route configuration.

[Explanation of symbols]

1 Traveling rail 8 Fixed path 10 Guide rail 11 Rack 14 Power supply device 20 Self-propelled trolley 22 Wheels 23 Collision prevention sensor 24 Traveling drive device 25 Control device 27 Pinion 35 Support surface 36 Positioning pin 38 Jig 40 Pallet 41 Positioning hole 42 Supported Surface 43 Wheel body 44 Locking hole 45 Pallet station 48
Wheel support part 50 Relay member 60 Moving device 64 Movable body 65 Locking pin

Claims (1)

[Claims] Claims: 1. A self-propelled cart is provided which is supported by a traveling rail and can freely travel on a fixed path, the upper surface of the self-propelled cart is formed as a support surface of a pallet, and the lower surface of the pallet that is not supported by the support surface is provided with: A plurality of wheels that can freely rotate in a direction orthogonal to the fixed path are provided, and a pallet station having a wheel support part at the same level as the support surface is placed on the side of the fixed path in the direction of the fixed path. A plurality of relay members are formed, and in front of each pallet station and on both sides of a certain path, a relay member is provided which faces the wheel body from below and is movable up and down to be at the same level as the support surface when raised, and is connected to the self-propelled cart. A conveyance facility using a self-propelled cart, characterized by being equipped with a moving device for moving pallets to and from a pallet station.