JPS61244680A - Heavywork fitting device to car body - Google Patents

Abstract

PURPOSE:To allow a worker not to lift a heavy work and reduce the fatigue of the worker by lifting a lift bed via a driving means while running a bogie synchronously with an overhead conveyor. CONSTITUTION:When a car body 3 comes on a bogie 15 at a fixed position, an air motor is operated, and the bogie 15 starts to travel forward along the convey direction 4 synchronously with an overhead conveyor 1. In this case, an air pressure cylinder 17 is extensionally operated gradually, thereby the lift bed 16 is lifted, and when a rear axle assembly 6 is lifted to a fixed fitting position, the extensional operation of the air pressure cylinder 17 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION A1 Object of the Invention (1) Industrial Application Field The present invention relates to a heavy work mounting device for mounting a heavy work onto a vehicle body from below, which is horizontally conveyed by an overhead conveyor.

(2) Prior Art Conventionally, when attaching a heavy workpiece, such as an axle shaft, to a vehicle body that is horizontally conveyed by an overhead conveyor, an operator lifts the axle shaft and attaches it.

(3) 'Problems to be solved by the invention Axle shafts are heavy items, and if they are installed manually as in the past, the worker will be very fatigued, and the installation time will be long and long if the work is done for a long time. , it also causes a delay in line speed.

The present invention has been made in view of the above circumstances. 7), 55. An object of the present invention is to provide a device for attaching a heavy work to a vehicle body, which reduces worker fatigue and increases the attachment speed.

B0 Structure of the Invention (1) Means for Solving Problems According to the present invention, a rail extending along the conveyance direction of the car body is laid below the overhead conveyor, and a rail extending along the conveyance direction of the vehicle body is laid below the overhead conveyor. The trolley that can travel is equipped with a lifting platform that can be raised and lowered, and a drive means for driving the lifting table up and down, and on the lifting table, there are a plurality of supports for receiving heavy workpieces. A buffer mechanism is interposed between the two.

(2) Operation With a heavy work placed on the pedestal, wait until the car body comes directly above it, and raise the lifting platform by the drive means while the cart runs in synchronization with the overhead conveyor 17. Workpieces can be attached to the vehicle body. At this time, even if the mounting parts of the vehicle body are somewhat similar, the heavy workpiece can be mounted in a slightly tilted state due to the action of the buffer mechanism.

(3) Embodiment An embodiment of the present invention will be explained below with reference to the drawings. First, in FIG. 1, a vehicle body 3 placed on a hanger 2 of an overhead conveyor 1 is shown in FIG. The vehicle body 3 is transported horizontally in a transport direction 4 by a mounting device 5 during the horizontal transport of the vehicle body 3, such as a rear axle assembly 6.

In FIG. 2, a damper assembly l is installed on the vehicle body 3 before the rear axle assembly 6 is installed.

The suspension ring 8, rear upper control arm 9, rear lower control arm 10, etc. have already been installed, and the attachment device 5 is used to assemble these to the rear axle assembly 6 and to attach the rear axle assembly 6 to the vehicle body. It will be done.

The rear axle assembly 6 is prepared by attaching a brake drum 13, a knuckle arm (not shown), etc. to a rear axle housing 12 in advance.

3 and 4, the mounting device 5 includes a pair of rails 14. which are laid below the overhead conveyor 1 in the conveying direction 4. ! :,, a cart 15 that can run on the rail 1.4 in synchronization with the t-bar head conveyor 1, a lifting platform 16 supported by the cart 15 so as to be able to rise and fall, and an elevator platform for driving the lifting platform 16 up and down. 16 and a pneumatic cylinder 1γ as one stage of the driver 5 disposed between the truck 15.

The rails 14 are laid in pairs on the floor 18.

Further, the trolley 15 includes a substrate 19, a pair of guide columns 20 and 20 erected on the substrate 19, and a substrate 19 in the transport direction 4? i=? 5
It includes a pair of wheels 21 each pivotally supported by a base plate 19 at the front and rear ends, and the wheels 21 are fitted into the rails 14. Thereby, the trolley 15 can travel back and forth in the transport direction 4.

Moreover, an air motor 23 supported and fixed to the base plate 19 via a support member 22 is connected to one of the wheels 21 via a clutch (not shown), and the operation of this air motor 23 causes the truck 15 to move. Self-blade travel can be performed in synchronization with the overhead conveyor 1.

The guide columns 20.20 are formed in a "U"-shaped cross section with open sides facing each other.
The upper ends of support rods 24, 24 extending vertically on the inner side of the elevator 20 are fixed to the lifting platform 16.

Reinforcing plates 25, 25 are installed between both support rods 24, 24 at vertically spaced apart positions.

A pair of rollers 26 are supported by the supporting rods 24, 24 at vertically spaced positions, and each roller 2
6 can be moved on the inner surfaces of the guide columns 20, 20. Thereby, the lifting platform 16 can be raised and lowered while being guided by the guide columns 20.20.

A support plate 2γ is provided between the intermediate portions of the guide columns 20 and 20.
A pneumatic cylinder 1γ extending vertically is supported by a trunnion by a bracket 28 provided at the center of the support plate 2γ. The upper end of a piston rod 29 that extends and retracts from the upper end of the pneumatic cylinder 11 is connected to the lifting platform 16 . Therefore, the pneumatic cylinder 11
The elevating table 16 is driven up and down by the expansion and contraction operation.

At the front end along the conveyance direction 4 and on both sides of the lifting platform 160, pedestals 30 for receiving the rear axle assembly 6 are respectively disposed. These pedestals 30 are formed in a half-moon shape that opens upward so as to be able to support the rear axle housing 12, and a spring 31 as a buffer mechanism is installed between these pedestals 30 and the lifting table 16. Each is interposed.

Next, the operation of this embodiment will be described. The vehicle body 3, to which the damper assembly 1, the spring 8, the rear upper control arm 9, and the rear lower control arm 10 are attached in advance, is horizontally conveyed by the overhead conveyor 1.

On the other hand, the lifting platform 16 of the truck 15, which is waiting at a fixed position, has been lowered to the lowest position, and the rear axle assembly 6 is placed on the platform 30.

When the car body 3 comes onto the trolley 15 at the fixed position, the air motor 23 is activated and the trolley 15 is moved over the rad conveyor 1.
It starts traveling forward along the transport direction 4 in synchronization with this.

At this time, the elevating table 16 is raised by gradually extending the pneumatic cylinder 1T, and when the rear axle assembly 6 is raised to a certain mounting position, the extending action of the pneumatic cylinder 1γ is stopped.

Next, the worker removes the vehicle body 3 of the rear axle assembly 6.
and assemble the rear axel assembly 6, the damper assembly T, the spring 8, the rear upper control arm 9, and the rear lower control arm 10. At this time, even if the vehicle body 3 is somewhat similar on the left and right sides, the spring 3
1 is interposed, so the rear axle assembly 6
A slight inclination is allowed, and the rear axle assembly 6 can be installed without difficulty.

After the installation of the rear axle assembly 6 is completed, the pneumatic cylinder 11 is contracted to lower the lifting platform 16, and the cart 15 is further moved backward in the transport direction 4 to return to its original position.

In this way, the vehicle body 3 of the rear axle assembly 6
Once the installation is complete, the worker only has to tighten the bolts and nuts of the rear axle assembly 6, and there is no need to lift heavy objects, reducing worker fatigue and saving time. The installation speed will not decrease even if the work is performed.

In the above embodiment, the mounting device 5 for mounting the rear axle assembly 6 as one heavy workpiece to the vehicle body 3 has been described, but the present invention can be widely implemented as a device for mounting a heavy workpiece to the vehicle body. .

Effects of the C0 Invention As described above, according to the present invention, a rail extending along the conveyance direction of the car body is laid below the overhead conveyor, and the bogie that can run on the rail in synchronization with the overhead conveyor has the following features: A lifting platform that can be raised and lowered and a driving means for driving the lifting table up and down are provided, and a plurality of cradle for receiving heavy workpieces are arranged on the lifting platform, so that heavy workpieces cannot be placed on the vehicle body. When installing, it is not necessary for the worker to lift a heavy workpiece, which reduces worker fatigue and prevents a decrease in the installation speed.

Furthermore, since a buffer mechanism is interposed between the pedestal and the lifting platform, heavy workpieces can be attached to the vehicle body while allowing the vehicle body to tilt to some extent.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is an overall side view, Fig. 2 is an enlarged perspective view showing how a heavy work is attached to the vehicle body, and Fig. 3 is a partially cutaway view of the mounting device. Enlarged side view,
FIG. 4 is a view taken in the direction of the ■ arrow in FIG. 1...Overhead conveyor, 3...Car body, 4...
・Transportation direction, 5...Mounting device, 6...Rear axle assembly as a heavy workpiece, 14...Rail,
15... Trolley, 16... Lifting platform, 11... Pneumatic cylinder as driving means, 30... Pedestal, 31...
・Spring as a buffer mechanism

Claims (1)

[Claims] In a device for attaching a heavy work to a vehicle body from below to a vehicle body that is horizontally conveyed by an overhead conveyor, below the overhead conveyor,
Rails extending along the conveyance direction of the car body are laid, and the trolley that can run on the rails in synchronization with the overhead conveyor includes a lifting platform that can be raised and lowered, and a drive means for driving the lifting platform up and down. 1. An apparatus for attaching a heavy work to a vehicle body, wherein a plurality of cradle for receiving the heavy work are arranged on the elevating table with a buffer mechanism interposed between the elevating table and the elevating table.