JPH04235822A - Lift mechanism of overhead traveling type carrier car - Google Patents

Abstract

PURPOSE:To easily load and unload a carried article in a bucket at an inclined position by way of tare movement by providing a rive means to respectively and independently drive a first suspending body to suspend and support one end side of the bucket and a second suspending body to suspend and support the other end side. CONSTITUTION:First and second suspending belts 11, 12 are wound back by first and second lift motors 13, 14 with brakes, and a bucket 18 is lowered on a roller conveyor 23 for delivery. Thereafter, when the other end lower face of the bucket 18 makes contact with the conveyor 23, a load on the side of the motor 14 fluctuates and a detected value of a second electric current sensor 28 exceeds a specified value, and accordingly, the motor 14 is stopped and lowering of the other end side is stopped. Hereby, only the belt 11 is wound back by the motor 13, one end side of the bucket 18 is further lowered, and when its lower face makes contact with the conveyor 23, a load on the side of the motor 13 fluctuates and a detected value of a first electric current sensor 27 exceeds a specified value. Consequently, the motor 13 is stopped and lowering of one end side of the bucket 18 is stopped, and the bucket 18 is located at an inclined lowering position in accordance with the inclined state of the conveyor 23.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] This invention relates to an overhead-traveling conveyance vehicle for transporting objects in a suspended state along a ceiling, and in particular to a lifting vehicle for lifting and lowering objects at predetermined positions for loading and unloading. It is related to the device.

0002

2. Description of the Related Art As a conventional elevating device of this type for an overhead traveling type conveyance vehicle, one having a structure as shown in FIG. 5, for example, is known. In this conventional device, a pair of rotating shafts 42 are provided in a carrier 41 that is moved along a traveling rail provided on the ceiling, and take-up pulleys 43 are fixed to both ends of the rotating shafts 42. . A hanging belt 44 as a hanging body is wound around each take-up pulley 43, and a bucket 46 is supported at the lower end of the hanging belt 44 to accommodate a conveyed object 45 in and out. One lifting motor 47 is provided in the carrier 41, and this lifting motor 47
As a result of the rotation, each take-up pulley 43 is rotated integrally via the pulley 48, belt 49, pulley 50, and rotating shaft 42. As the take-up pulley 43 rotates, each hanging belt 44 is wound up or unwound, and the bucket 4
6 is raised or lowered in a horizontal state.

0003

However, in this conventional lifting device, each hanging belt 44 is simultaneously wound up or unwound by one lifting motor 47, and the bucket 46 is raised or lowered in a horizontal state. Therefore, when loading objects 45 into the bucket 46 from the carrying-in conveyor or lowering the carrying objects 45 from the bucket 46 onto the carrying-out conveyor while the bucket 46 is lowered, There is a problem in that the transported object 45 is not moved by its own weight, and it is necessary to provide a special drive means for loading and unloading the transported object 45.

[0004] The present invention was made by focusing on the problems existing in the conventional technology, and its purpose is to provide a special drive means for loading and unloading objects. To provide an elevating device for a traveling type conveyance vehicle capable of loading and unloading a conveyed object on an inclined surface so that the conveyed object can be easily loaded and unloaded onto a bucket at a lowered position by moving its own weight without the need for installation. It is in.

[0005]

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a carrier is movably supported on a traveling rail provided on the ceiling, and objects can be moved in and out of the carrier. A lifting device for an overhead traveling type carrier in which a bucket for accommodating the bucket is supported so as to be raised and lowered via a hanging body, the hanging body being a first hanging body that hangs and supports one end of the bucket; A second hanging body that suspends and supports the other end is provided, and the conveying body is provided with a plurality of driving means for independently driving the first hanging body and the second hanging body.

[0006]

[Function] In the lifting device for an overhead traveling carrier configured as described above, the first hanging body and the second hanging body are independently driven by the first driving means and the second driving means. ,
The bucket can be lowered to an inclined position in accordance with the inclined state of the carry-in conveyor and the carry-out conveyor. Therefore, when the bucket is lowered to the inclined position, between the bucket and the carry-in conveyor or the carry-out conveyor,
Conveyed items are automatically loaded and unloaded using their own weight.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevating device for an overhead traveling type conveyance vehicle embodying the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 to 3, a traveling rail 1 is suspended and supported from a ceiling 2 of a factory or the like via a plurality of hanging rods 3, and is extended along a predetermined transport route. A running body 4 having a running motor 26 disposed therein has a running roller 5 on a running rail 1.
It is movably supported via a carrier 6, and a carrier 6 is provided at the bottom thereof. The first and second rotating shafts 7 and 8 are the carrier 6
A pair of first and second take-up pulleys 9 and 10 are fixed to both ends of the pulleys.

Each pair of first and second hanging belts 11 and 12 as hanging bodies are attached to the first and second take-up pulleys 9 and 1.
It is wound to 0. First and second lift motors 13 and 14 with brakes as a plurality of driving means are disposed within the conveyor 6, and as the first and second lift motors 13 and 14 rotate, the pulley 15 and belt 16 are rotated. The first and second rotating shafts 7 and 8 are rotated separately via the pulley 17, and the first and second suspension belts 11 and 12 are independently rotated with respect to the first and second take-up pulleys 9 and 10. To be wound up or rewound.

[0009] Almost box-shaped bucket 18 with both end faces open.
is suspended and supported by the pair of first suspension belts 11 at one end upper surface, and suspended and supported by the pair of second suspension belts 12 at the other end upper surface. A plurality of rollers 19 are arranged parallel to the inner bottom surface of the bucket 18, and a conveyed object 20 is accommodated and placed on the rollers 19 so as to be able to move in and out. Stopper 2
1 is rotatably provided at one end of the bottom of the bucket 18,
A spring (not shown) normally engages one end of the conveyed object 20 to prevent the conveyed object 20 from moving.

A pair of electromagnetic fixing pins 22 are provided oppositely on both sides of the lower part of the carrier 6, and when the bucket 18 is raised to a raised position close to the carrier 6, as shown by the chain line in FIG. , is held in the raised position by engagement with the electromagnetic fixing pin 22. An unloading roller conveyor 23 for unloading the transported object 20 is installed on the floor 24 corresponding to a predetermined transport position of the traveling rail 1, and is inclined downward at a predetermined angle from a position below the traveling rail 1 to the side. ing.

The position sensor 25 is provided on the running rail 1 corresponding to the installation position of the carrying-out belt conveyor 23, and is driven by a running motor 26 with a brake to move the conveyor 6 along the running rail 1 for carrying out. When the belt conveyor 23 is moved to the installation position, the position sensor 25 outputs a detection signal. first and second current sensors 27,
Reference numeral 28 is provided on the first and second lifting motors 13 and 14, and the first and second current sensors 27 and 28 detect changes in the current values flowing through the first and second lifting motors 13 and 14.

Next, the control circuit of the lifting device for the overhead traveling type carrier constructed as described above will be explained.
As shown in FIG.
OM) 32 and random access memory (RAM) 33
is connected. The CPU 31 includes a controller 34 for operating the entire device, the position sensor 25,
Various signals are input from the first current sensor 27 and the second current sensor 28 via the input interface 35. or,
The CPU 31 outputs activation or stop signals to the traveling motor 26, the first lifting motor 13, the second lifting motor 14, and the electromagnetic fixing pin 22 via the output interface 36 and drive circuits 37 to 40.

When the CPU 31 receives a detection signal from the position sensor 25 while driving the brake-equipped travel motor 26 to move the carrier 6 along the travel rail 1, the CPU 31 activates the travel motor 26. The conveying body 6 is stopped and held at a position corresponding to the roller conveyor 23 for carrying out by the braking action of the motor 26. Also, C
PU31 is a lifting motor 1 with first and second brakes.
3 and 14 to lower the bucket 18 at a position corresponding to the roller conveyor 23 for carrying out, the lower surface of one end or the lower surface of the other end of the bucket 18 comes into contact with the roller conveyor 23 for carrying out, and the first Or, when the load on the second lifting motors 13, 14 changes and the current detection value of the first or second current sensor 27, 28 changes beyond a predetermined value, the corresponding first or second lifting motor 13, 14 is stopped, and the lowering operations of one end side and the other end side of the bucket 18 are stopped separately.

[0014] Next, the operation of the lifting device for an overhead traveling type carrier constructed as described above will be explained. Now, when conveying the conveyed object 20, as shown by the chain line in FIG. held in the raised position. In this state, the transport body 6 is moved along the travel rail 1 by driving the travel motor 26 with a brake, and the object 20 is transported. When the carrier 6 is moved to a predetermined position corresponding to the roller conveyor 23 for carrying out, the position sensor 25 detects the
A detection signal is output to the PU 31, the travel motor 26 is stopped, and the conveyor 6 is stopped by the braking action of the motor 26.
is stopped and held at a position corresponding to the transport roller conveyor 23.

Thereafter, the electromagnetic fixing pin 22 is energized to release the carrier 6, and the first and second suspension belts 11 are driven by the first and second lifting motors 13 and 14 with brakes. , 12 are rewound and the bucket 18
is lowered onto the unloading roller conveyor 23. and,
As shown by the solid line in FIG. 2, when the lower surface of the other end of the bucket 18 comes into contact with the unloading roller conveyor 23, the load on the second lifting motor 14 changes, and the current detection value of the second current sensor 28 changes to a predetermined value. change beyond. Thereby, the second lifting motor 14 is stopped, and the lowering operation of the other end of the bucket 18 is stopped.

In this state, only the first suspension belt 11 is rewound by the drive of the first lifting motor 13, and the bucket 18
One end side of is further lowered. Then, as shown by the chain line in FIG. 2, when the bottom surface of one end of the bucket 18 comes into contact with the roller conveyor 23 for carrying out, the load on the first lifting motor 13 side changes, and the current detection value of the first current sensor 27 becomes a predetermined value. Vary beyond the value. As a result, the first elevating motor 13 is stopped, the lowering operation of one end of the bucket 18 is stopped, and the bucket 18 is placed in an inclined lowering position in accordance with the inclined state of the unloading roller conveyor 23.

Further, when the one end side of the bucket 18 is further lowered, the stopper 21 is stopped by the conveying roller conveyor 2.
3, it is rotated counterclockwise in FIG. 2, and the conveyed object 20 is released from being held. As a result, the transported object 20
is carried out by its own weight from the rollers 19 of the bucket 18 onto the carrying-out roller conveyor 23. Therefore, the conveyed object 2
There is no need to provide a special drive means for carrying out and moving the object 20, and the object 20 can be automatically carried out by its own weight from the bucket 18.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, but can be modified and embodied as follows without departing from the spirit of the invention. (1) The first and second hanging bodies may be constructed of ropes or chains instead of the hanging belts 11 and 12 of the previous embodiment. (2) First and second current sensors 27, 28 of the above embodiment
Instead of, the first and second lifting motors 13, 14 or the first
A sensor is provided to detect the rotational speed of the second take-up pulleys 9 and 10, and when the rotational speed detected by this sensor reaches a predetermined value during the lowering operation of the bucket 18, the first and second lifting motors are activated. 13 and 14 to be configured to stop control.

(3) At the position where the conveyed objects 20 are loaded into the bucket 18, the carrying-in roller conveyor is installed in an inclined state on the floor 24 corresponding to the traveling rail 1, and the bucket is adjusted to match the inclined state of the carrying-in roller conveyor. 18 is lowered into an inclined state with one end facing upward, and the conveyed object 20 is automatically carried into the bucket 18 from the carrying-in roller conveyor by its own weight.

(4) Stopper 21 provided on bucket 18
may be provided not only at one end but also at both ends.

[0021]

[Effects of the Invention] Since the present invention is constructed as described above, the bucket can be lowered to an inclined position in accordance with the inclined state of the carry-in conveyor and the carry-out conveyor, thereby facilitating the loading and unloading of conveyed objects. There is no need to provide a special driving means for moving the conveyed objects, and the excellent effect is that the objects can be easily loaded and unloaded into the bucket at the inclined position by shifting their own weight.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing an embodiment of an elevating device for an overhead traveling type carrier embodying the present invention.

FIG. 2 is a sectional view showing the entire elevating device.

FIG. 3 is a perspective view of the same lifting device.

FIG. 4 is a block diagram showing a control circuit of the lifting device.

FIG. 5 is a perspective view showing a conventional lifting device.

[Explanation of symbols]

1 Traveling rail, 2 Ceiling, 6 Transport body, 11
1st hanging belt as a first hanging body, 12 2nd hanging belt as a 2nd hanging body, 13 1st lifting motor as driving means, 14 2nd lifting motor as driving means, 18 Bucket, 20 conveyance thing

Claims (1)

[Claims] Claim 1: A transport body is movably supported on a traveling rail provided on the ceiling, and a bucket for storing transported objects in and out of the transport body is supported so as to be movable up and down via a hanging body. In the lifting device of the overhead traveling type transport vehicle,
A first suspension member that suspends and supports one end of the bucket as the hanging body.
A hanging body and a second hanging body that suspends and supports the other end of the bucket are provided, and the transport body is provided with a plurality of driving means for independently driving the first hanging body and the second hanging body. A lifting device for an overhead traveling type transport vehicle, which is characterized by: