JPS5861076A - Welding device in bogie type conveyor line - Google Patents

Abstract

PURPOSE:To reduce the number of positioning jigs by providing a positioning jig to position a work on a bogie and other positioning jigs to be easily taken in and out on the bogie for positioning the work on the bogie furthermore in a fixed work station. CONSTITUTION:Bogies 4 are respectively connected at the top of a plurality of arms 3 radially provided round a central shaft for moving circularly along a circular line, while various operations are given to works 6 on the bogies 4 in work stations. In this device, each bogie 4 is equipped with the first positioning jig 16. It is also provided with a hollow part 17, through which the second positioning jig 18 arranged in a fixed work station is available. This jig 18 is placed on a jig bogie 20 moving on a level 19 lower than a floor surface 15. For this jig 18, several kinds 18a-18d are prepared to be selectively and optionally used in accordance with kinds of works 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding device in a trolley-type conveyance line for workpieces (workpieces, hereinafter simply referred to as workpieces).

2. Description of the Related Art Assembly work for automobile body parts and the like is carried out by dividing the work into parts and processing them on lines with work stations for each work.

For example, welding and assembling the side piles of the car body of an rI vehicle involves carrying in the outer panel parts, fly centering, assembling,
Temporary attachment, positioning, assembly, temporary attachment of inner panel parts,
The work is divided into the work of carrying out the outer panel parts and the inner panel parts that have been cast and assembled on-site, including flannel parts and inner panel parts, and these works are carried out at each work station.

The transfer between these stations is carried out by means of a two-carriage system. In this case, conventionally, each work was carried out using a cart fully equipped with mI* determining jigs.

However, this method requires a positioning jig for tack welding and multiple light welding for each trolley, which increases the cost of the jig. In such cases, the number of jigs used tends to be large because the jigs used are different for each type, and the equipment costs are also high.

Therefore, an object of the present invention is to provide a bath wetting device # for a conveyance line that can reduce the number of PJrR of positioning jigs and facilitate mixed production of multiple vehicle types.

The structure of the present invention is an apparatus for transporting workpieces by means of a cart to a plurality of work stations for carrying in and out of the workpieces, tack welding, multi-layer welding, etc., in which the cart has a hollow part. The trolley is equipped with an i-th position tw determining jig for positioning the workpiece to be placed on the trolley. This is a welding device for a trolley-type conveyance line, which is further characterized in that a second position 1 and a determining jig for positioning are provided so as to be able to go in and out of the hollow portion of the trolley. Furthermore, a second positioning jig may be provided at the tack welding station, or a plurality of second positioning jigs may be arranged below the single flg and movement level of the second positioning jig, and the second positioning jig may be installed in a position below the movement level of the second positioning jig. The second positioning jig may also be configured to be raised into the hollow part of the trolley.

With the above configuration, each truck can be fully equipped with only the first positioning jig, and the second positioning jig can be installed at the station where ZW determination work is necessary. The number of jigs can be reduced compared to conventional devices that require the same number of sets. Therefore, jig costs can be reduced. In addition, even when performing mixed production using multiple different cars on the same line, each J
This can be easily handled by providing jigs from 0 to 1 U for each type and by following the hollow tray of the truck and passing the jig to the workpiece according to the volume of the truck. As a result, even if the workpiece changes due to a model change, it can be easily handled by simply changing the positioning jig at the work station. Therefore, it is possible to shorten the preparation period for production of model-changed vehicle models.

In addition, the fact that mixed production can be easily achieved means that even if production is traditionally done on multiple production lines, it may be possible to produce on a single line, and in that case, the workplace space can be reduced. .

The present invention will be described in detail below with reference to the drawings.

Figure 1 shows the welding assembly line for side panels.
This shows the case of a type mixed flow line. In a non-line system, a plurality of work stations are arranged at the same positions on the circumference of a circle having a predetermined diameter. A shaft 1 is provided at the center of the circular line, and a rim 2 is provided around the shaft. Further, the rim 2 is provided with an arm B extending radially from the rim 2, and this arm 8 is connected to the truck 4. The trolley 4 moves between each work station as the rim 2 rotates around the axis 1 in the direction of the arrow 5! It is now possible to do 1υ. Workpiece 6 is on cart 4
A predetermined work process is carried out as the cart 4 moves around the work station on the circumference. On this line, is the work station the outer panel loading/tapping station? , an outer mother tongue addition station 8 located adjacent to the station 70 on the circumference, and an inner mother tacking station 9, an inner panel addition station 10, and a panel addition station adjacent in the direction of the arrow 5. 11.III
Each station of the output station 12 is arranged respectively. A tack welding machine 18 is installed at station 7.9, and a spot welding machine 14 is installed at stations 8, 10, and 11.

Referring to FIG. 2, the carriage 4 is adapted to move on the floor surface 15 in the circumferential direction. The truck 4 is equipped with a first positioning jig 16. The truck 4 still has a hollow part ■7, and a second positioning jig 18 is inserted through it.
is now applicable. The second positioning jig is
It is placed on a jig trolley 20 that moves on a surface 19 that is lower than the level of the floor 1fl15, and this trolley 20
can move on rails 21. Note that this first positioning jig is installed at some work stations, which are stations 7 and 9 in this embodiment.

Referring to FIG. 3, the number of first positioning jigs 18 can be arranged as required. In this example,
lYuzu type second positioning jig 18m.

18 b, ], 8 c, and 18 d are arranged, and depending on the plum type of the workpiece 6, one of the second positioning jigs moves in the direction of the arrow so that it can reach 1 of the trolley 4. It has become.

A workpiece 6, that is, a component of a void panel, is first carried into a station 7. At this station, outer panel parts constituting other side panel parts are added to the workpiece 6. In this case, the workpiece 6 is positioned by the first positioning jig installed on the trolley 1 and placed on the trolley 4 11, and the outer panel part is placed at the position of the first positioning jig 18 appropriately selected depending on the type of the part. Positioned by Then, these parts are tack welded by the tack welding machine 13 in the positioned state. As a result, the work at station 7 is completed, and the trolley 4 places the temporarily attached workpiece 6 and moves along the line on the circumference to reach station 8, where the additional welding of the temporary attached part is for additional work. Welding machine 14
This is done using Next, the workpiece 6 swings in the direction of the arrow 5 and reaches the station 9 in the same manner as described above. At this station, the inner panel parts are added to the workpiece 6, and the inner panel parts are temporarily attached to each other, and the inner panel parts and the outer joint parts are temporarily attached. Since the work contents are the same as those at station 7, detailed explanation will be omitted. Workpiece 6 is then transferred to station IO, where it is subjected to an enlargement process in the same manner as at station 8. Further, the workpiece 6 is subjected to additional welding at a station 11 and then removed from a carry-out station 12. In this welding assembly line, the second positioning jig only needs to be provided at some stations, ie, 7 and 9, so the number of jigs can be reduced. Furthermore, according to the present invention, one or more of the plurality of second positioning jigs can be selected and applied depending on the vehicle type, so that mixed production of multiple vehicle types can be easily carried out.

-The present invention also applies to other types of assembly lines.
It can be applied to ff+. FIG. 9 and FIG. S show an embodiment in which the present invention is applied to another type of assembly line. Referring to FIG. 9, the main assembly line is in a closed loop, with a loading station 81 and a temporary assembly station 8.
It consists of a 2+IJS article assembly station 8B, an idle station 84, a main work station 85, 88, and an unloading station 87, and the line advances in the direction of the arrow. In this assembly line, the present invention can be fully applied by providing second positioning jigs at stations 82 and 83 where positioning work is performed. FIG. S shows an example in which the present invention is fully applied to another assembly line. This line is at outer panel tacking station 41. It is composed of a fi striking station 42, an inner panel tacking station 4B, an expansion station 44, an expansion station 45, and a carry-out station. In this example, station 41. By providing the first positioning jig at and 48, the present invention can be applied to the above-mentioned colleague.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an assembly line in an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is m, second position t.
1. Is the plan view, Fig. 5, and Fig. 5 showing the arrangement and example metal of the fixing jig the present invention? ]ll - Schematic diagram of another applicable assembly line. Explanation of symbols ■・・・・・・Axis, 2・・・・・・・・・
Rim, 8... Arm, 4...
・・・・・・Dolly, 6・・・・・・・・・ Workpiece,
7...Outer A' panel loading station, 8...Outer mother panel expansion station, 9...Inner panel tacking station Station, IO... River... Innano 9nel extra hit Steenyon, 11...
・Hanel Gonuchi Station, 12・・・・・・・・・
・Carry-out station, 1B...Tack welding machine, ■4.River...Bath welding machine for additional welding, 15.
・・・・・・・・・ Floor side, 16・・・・・・
...7th place 1 jig, 17...Hollow part, 18...2nd positioning jig,
20......Jig trolley, 21...
...Rail, patent applicant Toyo Kogyo Co., Ltd.

Claims (3)

[Claims] (1) In a device for transporting workpieces by a trolley to a plurality of work stations for carrying in and out of the workpieces, tack welding, expansion welding, etc., the trolley has a hollow part, and the A first positioning jig is provided for positioning the workpiece placed on the trolley KU, and a second positioning jig for further positioning the workpiece on the trolley is installed at some of the work stations in the hollow part of the trolley. A welding device for a trolley-type conveyor line, which is completely characterized by being installed so that it can be accessed and removed. (2) The welding apparatus according to item 1, wherein some of the work stations are tack welding stations. (3) A plurality of the second positioning jigs are arranged below the movement level of the cart, and the second positioning jigs are raised into the hollow part of the cart depending on the type of workpiece. Welding equipment described in section 0