JP2607060Y2 - Pallet truck - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bogie which facilitates processing of the bottom surface of a workpiece, that is, the mounting bottom surface of the workpiece placed on the bogie.

[0002]

2. Description of the Related Art When a workpiece, for example, an automobile mounted on a transport trolley in an automobile assembly and manufacturing line, is subjected to various processes on the trolley, the bottom of the automobile, Since the truck is in the way of the mounting surface of the car mounted on the truck and cannot be processed,
The automobile is transferred to an overhead conveyor or the like, and the bottom of the automobile is processed while the automobile is suspended overhead.

[0003]

In the above prior art, for example, as disclosed in Japanese Patent Application Laid-Open No. 1-278876, a truck on which a workpiece such as an automobile is mounted is mounted on the lower surface of a blind plate-like loading platform. , A facility for mounting the workpiece on the loading table is disposed, and traveling equipment such as traveling wheels is attached to the lower surface of the chassis, so the bottom of the workpiece, that is, Since the mounting bottom surface of the workpiece is opposed to the upper surface of the loading table, it is impossible to process the bottom of the workpiece from below the bogie while the workpiece is mounted on the cart. Was.

Therefore, on the trolley, the processing is performed only on the side surface or the upper surface of the workpiece, and the bottom is processed by mounting the workpiece on a hanging hanger or the like, opening the bottom, and processing the bottom. Was.

[0005] For example, in the assembly and production line of automobiles, sealing of the doors of the automobile and the like are performed on a trolley, and operations such as spraying a sealant at the bottom are transferred to hangers of an overhead conveyor.

For this reason, a reduction in work efficiency due to the transfer work of the workpiece is inevitable.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a truck in which not only the side surface and the top surface but also the bottom surface of the workpiece can be processed while the workpiece is mounted on the bogie without being transferred. A window frame-shaped pallet surrounding a plane space in which a bottom surface of the work is accommodated, provided with a work support rod protruded by being cantilevered while leaving a working space in the space, The pallet is provided with a self-propelled driving device for controlling the driving of the running wheels by attaching running wheels to the lower corners of the pallet while allowing the entire bottom of the workpiece to be easily processed through the space. A truck is formed, and the traveling track of the pallet truck is arranged below both side edges of the pallet so that the track does not hinder the work performed on the bottom of the workpiece from below.

[0008]

Since the flat space formed in the window frame-shaped pallet has an expansion in which the bottom surface of the work can be accommodated, a part of the bottom surface of the work is shielded by the frame of the window frame-shaped pallet. In addition, since the support rod of the workpiece is protruded from the pallet in a cantilevered manner while leaving the working space in the plane space, and the workpiece is mounted and supported, the workpiece is mounted on the flat surface. There is no danger of falling through the space, and furthermore, since a self-propelled driving device for driving and controlling the running wheels attached to the lower corners of the pallet is provided, the running track moves in the plane space of the pallet. The pallet itself is a self-propelled trolley, and the machining operation to be performed on the bottom of the workpiece from below is easily performed without any trouble without any risk of vertical cutting.

[0009]

1 to 3 are a plan view, a front view and a side view, respectively, showing an embodiment of the present invention.
A window frame-shaped pallet 1 surrounding a space A in which a bottom surface of a workpiece B such as an automobile body shown by an imaginary line as shown in FIG. 1 is accommodated, and a cantilever is left on the pallet while leaving a working space in the space A. A plurality of workpiece support rods 2 supported and protrudingly provided.
a, 2b, 2c and 2d, traveling wheels W attached to the lower corners of the pallet 1 and a self-propelled driving device for controlling the traveling wheels W, respectively. Rolls on the top and the rail R
Are provided on both sides.

[0010] As shown in FIG. 3, the work floor 3 supported by the pillars P erected on the floor F forms a work space 4 which is missing along the lower surface of the traveling path of the pallet truck. The running rail R is opposed to the both side edges of the work floor 3 and a power supply line 5 is provided at one of the side edges, and the power supply line 5 is attached to a pallet truck. The provided current collector 6 is in sliding contact.

Then, the self-propelled driving device for driving and controlling the traveling wheel W is operated by the electric power obtained from the current collector 6, and more specifically, the motor M drives the traveling wheel W to control the traveling wheel W. The device 7 and the inter-vehicle distance detection sensor 8 are activated.

The reflecting plate 9 provided at the rear of the pallet 1
The transmission shaft T reflects the signal from the inter-vehicle distance detection sensor 8 and transmits the reflected signal to the control device 7 to control the traveling of the pallet truck. The transmission shaft T transmits the driving force of the motor M to the wheels W. It is.

On the work floor 3, robots 10A and 10B for sealing the door portion of the automobile B are opposed to each other, and in the work space 4 on the floor F, a robot 11 for machining the bottom of the automobile.
A and 11B are opposed.

The protective plate 12 prevents the sealant from being attached to the power supply line 5 when the sealant is sprayed on the bottom surface of the workpiece.

[0015]

The present invention is directed to a pallet truck in which traveling wheels are mounted at the lower corners of a window frame-shaped pallet surrounding a plane space in which a bottom surface of a workpiece is accommodated, while leaving a working space in the plane space. Since the workpiece is mounted on the workpiece supporting rod protruded by being held and supported, the entire bottom surface of the workpiece is exposed in the window frame-shaped plane space, and the entire bottom surface of the workpiece is viewed from below. Can be machined by robot work, so that the work on the top and side surfaces of the work and the work on the bottom surface can be performed simultaneously, greatly reducing the work time and driving control of the running wheels. By having a self-propelled drive device, it is not necessary to transport the work by replacing it on the overhead conveyor when performing the work on the bottom surface of the work as in the past, significantly improving the work efficiency, Also pallets Since the pallet truck can be self-propelled by directly attaching the wheels and the self-propelled drive unit, not only the height of the truck is reduced, but also the structure is simple and the maintenance management is easy. It is enormous.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view showing the embodiment of the present invention.

FIG. 3 is a side view showing an embodiment of the present invention.

[Description of Signs] 1 Pallet 2a to 2d Workpiece support rod 3 Work floor 4 Work space 10A, 10B, 11A, 11B Work robot A Pallet truck flat space B Workpiece R Travel rail W Travel wheel F Floor

Claims (1)

(57) [Scope of request for utility model registration] 1. A pallet provided with a work support rod protruding from a window frame-like pallet surrounding a plane space in which a bottom surface of a work is accommodated, the work support being cantilevered while leaving a working space in the space. A pallet truck comprising a traveling wheel mounted on a lower surface corner of the pallet and a self-propelled driving device for controlling the driving of the traveling wheel.