JPH0350142Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field The present invention relates to an overhead conveyor device,
In particular, the present invention relates to a novel overhead conveyor device that does not require an explosion-proof type even if the electric hoist partially passes through a hazardous material handling process such as painting.

Prior Art Conventionally, in automobile factories, etc., overhead conveyor devices are often used in hazardous material handling processes such as paint shops, and electric hoists that run on running rails are often used. An energized rail for the electric hoist was laid parallel to the running rail along the entire length of the hoist. However, a three-phase alternating current of about 200V is constantly flowing through the current-carrying rail, and the current-carrying roller on the electric hoist rolls into contact with the current-carrying rail, which can generate sparks. There is a risk of ignition and a fire, and to prevent this, the law requires, for example, that energized rails must be installed at a specified distance from the top and sides of the painting room, and that all electric hoists must be explosion-proof. It is stipulated that it must be of the same name. For this reason, a large space is required to lay the running rails, and the electric hoist is also expensive and heavy.

Furthermore, Japanese Utility Model Application No. 58-124125 discloses a hoisting machine equipped with a current collector in which a current-carrying member is provided only in a part of the running track, but this conventional example only runs on all parts of the running rail. The purpose of this system is to allow the motor and hoisting motor to be used while energized, and the reason why only a part of the traveling rail is energized is because the hoisting motor is always stationary. The storage battery built into the movable side can be charged at any position. Therefore, since power is always supplied to the motor from the built-in storage battery, there is naturally a risk of explosion if the motor is used in a hazardous material handling process as in the invention of the present application, and the motor in the conventional example is An explosion-proof type must be used, which is no different from the conventional example described above, and the motor has disadvantages such as extremely high cost.

Purpose The present invention was made in order to eliminate the drawbacks of the prior art described above, and its purpose is to partially pass through the hazardous materials handling process that handles hazardous materials such as painting, and to In an overhead conveyor system in which a hoist is installed and an electric hoist operated only by external power supply runs on the running rail, only a part of the non-hazardous material handling process apart from the hazardous material handling process is used. The purpose of the present invention is to eliminate the current-carrying rail in the hazardous material handling process and improve safety by providing a current-carrying rail and configuring the hoist so that no electricity is supplied to the electric hoist during the hazardous material handling process. This eliminates the need for an explosion-proof electric hoist and enables the use of a non-explosion-proof, lightweight, and inexpensive electric hoist.

Configuration In short, the present invention is based on a system in which a traveling rail is laid partially through a hazardous material handling process that handles hazardous materials such as painting, and a chain driven by a separate drive source is disposed along the traveling rail. , an electric hoist connected to the chain, movably suspended from the traveling rail, and configured to be operated only by external power supply, for lifting or lowering a workpiece, runs along the traveling rail. In the overhead conveyor apparatus, a current-carrying rail is provided in which the electric hoist is energized only in a part of the non-hazardous material handling process apart from the hazardous material handling process to lift or lower the workpiece, and The electric hoist is characterized in that no electric power is supplied to the electric hoist during the hazardous materials handling process.

The present invention will be explained below based on embodiments shown in the drawings. As shown in FIG. 1, in the overhead conveyor device 1 according to the present invention, a traveling rail 3 is laid partially through a hazardous materials handling process 2 that handles hazardous materials such as paint (for example, organic solvents). An electric hoist 4 that is operated only by external power supply runs on the traveling rail,
Short energizing rails 6, 7 and 8 that can energize the electric hoist 4 are provided only in a part 5a of the non-hazardous material handling process 5 away from the hazardous material handling process 2, and the lengths of these energizing rails 6, 7 and 8 are The workpiece 11 can be lifted or lowered by the chain 9 and the hook 10 only within this range.

The hazardous material handling process 2 includes, for example, a painting room 12 and various painting equipment (not shown) housed therein. Although the running rail 3 is schematically shown as a perfect circle in FIG. 1, it may have any shape depending on the layout of the factory.

The non-dangerous material handling process 5 is a process in which the workpiece 11 is mainly attached to and removed from the hook 10, and the workpiece is hoisted and lowered by the electric hoist 4, and with reference also to FIGS. 2 and 3, Three short current-carrying rails 6, 7, and 8 are laid in parallel with the traveling rail 3, and a three-phase alternating current of, for example, 200V is flowing therethrough. A running roller 13 is mounted on the running rail 3 so as to be able to roll freely, and the electric hoist 4 is suspended by a support member 14. Each current-carrying rail 6, 7, and 8 has a current-carrying roller 16, 1
7 and 18 are adapted to be in contact with each other while rolling, and power is supplied to the electric hoist 4 via support members 26, 27, and 28.
The electric hoist 4 is connected to a chain 20 that is driven and travels by another power source. It goes without saying that the electric hoist 4 is equipped with a known push button switch (not shown).

Function The present invention is constructed as described above, and its function will be explained below. The chain 20 is driven by a power source (not shown) and is connected to the running rail 3.
The electric hoist 4 travels along parallel to the travel rail. The electric hoist can move on the running rail by its running rollers 13, and can freely pass through the non-dangerous material handling process 5 and the dangerous material handling process 2. In the non-hazardous materials handling process 5, an operator operates a push button switch within the length of the energized rails 6, 7, and 8 to transfer the current from the energized rails to the respective energized rollers 16, 17, and 18. When energized, a three-phase alternating current of, for example, 200 V is supplied to the electric hoist 4, the motor rotates, and the workpiece 11 attached to the hook 10 can be lifted up or lowered by the chain 9.

Next, when the installation and removal work of the workpiece 11 is completed, the chain 20 is driven again by another power source, and the electric hoist 4 with the workpiece 11 suspended runs along the traveling rail 3, causing danger. The operator enters, for example, a painting room 12 in the object handling process 2, and the workpiece 11 is painted. In this case, even if there is a large amount of hazardous materials such as organic solvents in the painting room 12, there is no energized rail on the traveling rail 3 in the dangerous materials handling process 2, so the movement of the electric hoist 4 is Therefore, in the overhead conveyor system 1 of the present invention, the electric hoist 4 is a non-explosion-proof, lightweight and inexpensive electric hoist. It is possible to employ a hoist. Also, energized rails 6, 7 and 8
Since the length is very short, equipment costs can be reduced, and there is no need to install the traveling rail 3 itself above the painting room 12 as in the past, and the traveling rail 3 can be installed in the painting room 12 in the first place. Since it can be laid as shown in the figure, the space occupied by the overhead conveyor device 1 can be significantly reduced. In addition, since the installation and removal work of the workpiece 11 only needs to be carried out at a specific location, the present invention allows for a very rational layout in the factory and reduces the need for various equipment and materials.
Moreover, no inconvenience occurs during work.

Effects Since the present invention is configured and operates as described above, a traveling rail is laid partially through the hazardous material handling process that handles dangerous materials such as paint, and an external vehicle is placed on the traveling rail. In an overhead conveyor system in which an electric hoist that operates only by power supply from the Since the electric hoist is configured so that no electric power is supplied to it, it is possible to eliminate energized rails in the process of handling hazardous materials, increasing safety, and as a result, eliminating the need for an explosion-proof electric hoist. This has the effect of making it possible to use a non-explosion-proof, lightweight, and inexpensive electric hoist.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, in which Fig. 1 is a schematic perspective view of an overhead conveyor device, Fig. 2 is a front view of the main part, and Fig. 3 is a longitudinal sectional view of the part shown in Fig. be. 1 is an overhead conveyor device, 2 is a hazardous material handling process, 3 is a traveling rail, 4 is an electric hoist, 5
is a non-hazardous material handling process, 5a is a part, 6, 7 and 8
1 is a current-carrying rail, 11 is a workpiece, and 20 is a chain.

Claims (1)

[Scope of utility model registration request] A traveling rail is laid partially through a hazardous materials handling process that handles hazardous materials such as paint, and a chain driven by another drive source is installed along the traveling rail and connected to the chain. and an overhead conveyor that is movably suspended from the traveling rail and is configured to be operated only by external power supply, so that an electric hoist for hoisting or lowering a workpiece runs along the traveling rail. In the apparatus, a current-carrying rail is provided that energizes the electric hoist to lift or lower the workpiece only in a part of the non-hazardous material handling process that is apart from the hazardous material handling process, and An overhead conveyor device characterized in that the electric hoist is configured so that no electric power is supplied to it.