JP2823403B2 - Mounting device for small assembly to vehicle body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mounting lower parts of a vehicle, such as an engine and its accessories, to a vehicle body.

[0002]

2. Description of the Related Art A device disclosed in Japanese Patent Application Laid-Open No. 64-44392 is known as a device for mounting an engine and its accessory parts, or lower parts of a vehicle such as a knuckle arm and a suspension to a vehicle body.

In the above-mentioned conventional apparatus, a transfer line for a work pallet and a transfer line for a jig pallet are provided, a plurality of lower parts are previously assembled on separate lines to form a small assembly, and the small assembly is placed on the work pallet. On the other hand, on the jig pallet, the bolts required to attach the small assembly to the vehicle body are set, and the work pallet on which the small assembly is set is superimposed on the jig pallet on which these bolts are set. The work pallet is carried downward, the bolt is turned by a nut runner, the small assembly is attached to the vehicle body, and the emptied work pallet and jig pallet are separated and returned to their respective lines. The body is positioned and mounted, and bolts are set on the jig pallet.

[0004]

In the above-mentioned conventional mounting device, a supply device for positioning and setting a small assembly assembled on another line on a work pallet is required, and it takes a long time for mounting. In addition, since the small assembly line for assembling a plurality of lower parts and the attachment line to the vehicle body are separate, the entire apparatus becomes large.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a part of a transport line through which a work pallet circulates is a small assembly line for assembling a plurality of lower parts, and a small assembly is attached to a vehicle body on the small assembly line. With the transport line where the jig pallet on which the bolts are set are circulated.

[0006]

[Function] A plurality of lower parts are assembled on a work pallet while the work pallet is being conveyed at a low speed on a small set line which is a part of the work pallet transfer line, while the jig pallet is traveling at a higher speed than the small set line. Set the bolts on the jig pallet at the line, superimpose the work pallet on the jig pallet at the junction of the work pallet transfer line and the jig pallet transfer line, and transfer these work pallets and the jig pallet to the jig pallet. At a running speed of, the vehicle is carried below the vehicle body, and the small assembly is mounted on the vehicle body.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a schematic plan view of a device for mounting a small assembly according to the present invention, FIG. 2 is a plan view of a state where a work pallet and a jig pallet are overlapped, and FIG. 3 is a device for mounting a small assembly according to the present invention. 4, FIG. 4 is a view in the direction of arrow A in FIG. 3, FIG. 5 is a view in the direction of arrow B in FIG. 3, and FIG. 6 is a view in the direction of arrow C in FIG.

As shown in FIG. 1, the mounting apparatus according to the present invention has a transfer line L1 for circulating a work pallet in front and rear of a vehicle body 1 fixed at a mounting position, and a transfer line L2 for circulating a jig pallet. Is provided. The transport line L1 where the work pallet circulates merges with the transport line L2 where the jig pallet circulates at the point P1 and passes under the vehicle body. The point up to the point P2 becomes a common line L2a, and branches to each line at the point P2.

Then, the work pallet transport line L1
Is a small assembly line L1a for assembling a plurality of lower parts after branching at the point P2 and reaching the point P1, and a conveying line L2 of the jig pallet is branched from the point P2 to a bolt setting position at the point P3. Return line L2b,
The return line L2b is provided under the floor or the like so as not to interfere with other lines.

In this embodiment, the transport line L1
The traveling speed of the transport line L2 is set to a low speed in accordance with the assembly of a plurality of lower components. In order to absorb the difference in traveling speed between the transport lines L1 and L2, a total of 43 work pallets 2 are provided on the transport line L1.
Are circulated, and three jig pallets 3 are circulated on the transport line L2.

As shown in FIG. 2, a small assembly 4 composed of a plurality of lower parts assembled on a small assembly line L1a is positioned and mounted on the work pallet 2 as shown in FIG. A bolt 5 for attaching 4 to vehicle body 1 is set.

The work pallet 2 is positioned and superimposed on the jig pallet 3 traveling on the transport line L2 at the point P1, and travels together with the jig pallet 3 on a common line L2a forming a part of the transport line L2. As shown in FIG. 3, the pallet is placed on the floating table 7 of the elevator 6 below the vehicle body 1 positioned as shown in FIG. 3, and the elevator 6 is further raised to position the small assembly 4 with respect to the vehicle body 1. In this state, the small assembly 4 is attached to the vehicle body 1 by turning the bolts 5 set on the jig pallet 3 from below using nut runners 8 shown in FIG.

On the other hand, a hanger 11 is movably engaged with a rail 10 constituting a transport line of the vehicle body parallel to the small assembly line, and the vehicle body 1 is positioned and held on the hanger 11.

When the small assembly 4 is mounted on the vehicle body 1, the vehicle body itself must be positioned with respect to the mounting device. For this purpose, in this embodiment, a front positioning device 12 and a rear positioning device 13 are provided at the mounting positions.

The front positioning device 12 comprises a vertical cylinder unit 15 fixed to a frame 14 and a pin 16 which is protruded and retracted by the cylinder unit 15.
The front portion of the vehicle body is positioned by engaging with 1a.

The rear positioning device 13 has arms 17, 17 mounted on a frame 14, and a finger 18 that opens and closes in the width direction of the vehicle body and a pin 19 that protrudes and retracts in the width direction of the vehicle body at the tip of the arm 17. After the approximate positioning in the width direction is performed, the pin 19 is projected to perform accurate positioning and fixed.

As described above, the small assembly 4 is attached to the vehicle body thus positioned and fixed by the nut runner. Then, the emptied work pallet 2 and the jig pallet 3 after the small assembly 4 is attached to the vehicle body 1 side.
Is conveyed while being overlapped to the branch point P2, separated at the branch point P2, and the work pallet 2 is
a, a plurality of lower parts are assembled on the work pallet 2 again, and the jig pallet 3 returns to the bolt setting position P3 through the return line L2b.

[0018]

According to the present invention as described above,
A part of the transport line where a large number of work pallets circulate is a small assembly line for assembling a plurality of lower parts, and a small jig pallet in which bolts for attaching small assemblies to the vehicle body are circulated. The work pallet is transported together with the jig pallet to the lower part of the vehicle body according to the transfer speed of the jig pallet, and the small assembly is attached to the vehicle body, so the pallet used in the small assembly line and the pallet used in the work transfer line Can be shared.

Further, since the small set line becomes a part of the transfer line, the number of lines is reduced, and the equipment can be simplified. Furthermore, by making the number of work pallets larger than the number of jig pallets, it is not necessary to match the speed of the assembly line with the speed of the small assembly line, and the degree of freedom in each process can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a device for mounting a small assembly according to the present invention.

FIG. 2 is a plan view showing a state in which a work pallet and a jig pallet are stacked.

FIG. 3 is a front view of a mounting device for a small assembly according to the present invention.

FIG. 4 is a view in the direction of arrow A in FIG. 3;

FIG. 5 is a view in the direction of arrow B in FIG. 3;

FIG. 6 is a view taken in the direction of arrow C in FIG. 3;

[Explanation of symbols]

1 ... body, 2 ... work pallet, 3 ... jig pallet, 4
... Small assembly, 5 ... Bolt, 6 ... Elevating table, 7 ... Floating table, 8 ... Nutrunner, 11 ... Hanger, 12
... front positioning device, 13 ... rear positioning device, L1 ...
Work pallet transfer line, L1a ... Small set line, L2
... Jig pallet transfer line, L2a ... Common line, L2
b: return line, P1: confluence point, P2: branch point, P3 ...
Bolt set position.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-56-103665 (JP, A) JP-A-62-149570 (JP, A) JP-A-63-2784 (JP, A) JP-A-63-1983 275487 (JP, A) JP-A-1-115788 (JP, A) JP-A-3-176286 (JP, A) JP-A-61-21873 (JP, A) JP-A-2-286478 (JP, A) Japanese Utility Model Application Hei 3-28087 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B62D 65/00 B23P 21/00 303

Claims (1)

(57) [Claims] A transport line for circulating a work pallet on which a small assembly formed by assembling a plurality of lower parts is circulated, and a transport line for circulating a jig pallet on which a bolt for mounting the small assembly on a vehicle body are circulated. Then, in the mounting device for a small assembly in which the jig pallet and the work pallet are superimposed on each other and carried in to the lower side of the vehicle body, the number of the work pallets is larger than the number of the jig pallets, and the work pallets are circulated. A small assembly line for assembling a plurality of lower parts, wherein a part of the transfer line to be assembled is attached to a vehicle body.