JPS617094A - Jig exchanger in automatic welding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a jig changing device in an automatic welding device mainly used for welding the body of two-wheeled motor vehicles.

The applicant of this application previously filed a patent application for this type of welding device in 1983-
No. 11804, a lower truck is provided that is reciprocally movable between a workpiece set position and a welding position in front of the workpiece set position, and an upper truck that is reciprocably movable between the welding position and a payout position in front of the welding position, A first fixture for setting the workpiece is supported on the trolley, and a second jig for taking the workpiece bracket on the first jig is supported by the upper trolley via a vertically movable elevating frame suspended from the upper trolley. , after setting a work consisting of a plurality of members constituting the vehicle body on the first jig at the setting position, the workpiece is carried to the welding position by the advancement of the lower truck to perform the first welding; Next, the workpiece is received by the second jig, the second jig is made reversible, and the posture of the workpiece is changed to perform the second welding, and then the workpiece is transferred to the upper carriage. We have proposed a device in which the workpiece is transported to the unloading position by moving forward, but when changing the model of the workpiece with this device, the second jig must be docked to the 11th fixture and then disengaged from the lifting frame. , the two jigs are moved to the work setting position by the lower trolley and the jig exchange work is carried out in one step.In this case, a chain block, combo, etc. is used to lift the first jig from the lower trolley to the work setting position. Since it is necessary to arrange various jig replacement members, the working space for placing the workpiece is narrowed, resulting in an inconvenience that the workability of the workpiece setting work is deteriorated.

In the present invention, the first hoisting tool is lifted from the lower cart by a lifting frame provided on the upper cart, and transported to a payout position, and at this position, the first jig, the second jig, and other jigs are all docked together. The purpose of this device is to provide a device that can be replaced with other units and eliminates all the above-mentioned disadvantages, and includes a lower cart that can freely reciprocate between a workpiece setting position and a welding position in front of the workpiece set position. A reciprocating upper carriage is provided between a welding position and a discharging position in front of the welding position, a first jig for setting a workpiece is mounted on the lower carriage, and the upper carriage is suspended from the first jig and is movable up and down. In an automatic welding apparatus that supports a vehicle that receives a workpiece on the first jig and two jigs through a frame, in addition to a first clamp member for the second jig, the first clamp member is attached to the lifting frame. A second clamp member for one jig is provided, and the first
The jig is docked to the second jig at the welding position and is delivered from the lower truck to the elevating frame so that it can be freely transported to the dispensing position, and from both jigs that are docked at the dispensing position. The jig unit is characterized by being freely replaceable with other jig units.

The present invention will be explained below with reference to the illustrated embodiments.

In the drawing, (1) is the guide rail (2) installed on the floor.
), workpiece set position wA and welding position B in front of it.
The lower truck (6) is reciprocated by the drive motor (3) via the pinion (41) and the rack (5), and (6) is the machine frame (7) (7) erected on both sides of the welding position B. ) fixed to the guide rail +81 (F section truck reciprocated along the guide rail 81 between the welding position B and the payout position 0 in front thereof by the drive motor (9) via the binion α■ and the rack aυ) A first jig α2 for work setting is provided on the lower truck (1), and a plurality of work clamps (12a) provided on the first jig σ2 are used to secure the body of the two-wheeled motor vehicle. The first jig (121 is surrounded by a lifting frame 0 which can be raised and lowered and which is suspended from the F section truck (6). The surrounding frame-shaped second jig 041f is supported, and the second jig (
14, the workpiece w'4 on the first jig α2 can be freely received by a plurality of workpiece clamps (14a) provided therein;
A positioning pin α9 is provided on the first jig az so that both the jigs 021 (141) can be aligned with each other during receiving.

Here, the elevating frame α3 is moved along the front and rear guide bars C6a) (, 6a) that are heavily attached to the upper truck (6).
) is lifted and lowered by the lifting cylinder (16) on the lifting frame α~, and the lower ends of the lifting frame α~ are inverted via the rack 081 and the binion housing 9 by the respective reversing cylinder circles on the lifting frame α3. The second sleeper (14) is supported between each inversion shaft (1'3a) ((13a)
By constructing it, it can be turned upside down.

The welding position BK has a plurality of welding robots (2) arranged on both sides thereof, and thus the work W set on the first jig α2 at the work setting position A is transferred to the lower carriage (1).
) is carried forward to the welding position 11B as shown in the second figure, and the first welding is performed by each robot (a). After this welding, the vagina lifting frame α3 is lowered and the second jig α4) is moved. As shown in the fourth figure, the positioning pin 09 on the first jig Q21 positions and docks the first anchor a2, and in this state, the work clamp (12a) on the first jig α2 is unclamped. operation and the clamping operation of the work clamp (14a) on the second jig I to provide the second clamping tool 04)
to receive the workpiece W2, then raise the elevator frame (131) and reverse the second jig α41 to perform the second welding on the workpiece W, and after this welding, move the upper vagina carriage (6) forward. The workpiece w6 is transported to the lifting position 0, and the workpiece is transferred to an appropriate workpiece unloading member (not shown) to unload the workpiece.
) was returned to the workpiece setting position fJ713, the next workpiece W was set, and by repeating the above steps, the entire car body welding could be performed continuously. Although the above is not particularly different from the above-mentioned proposal, according to the present invention, the first jig 02J is docked to the second sleeper a41 at the welding position #B, and the lifting frame is moved from the lower bogie il+. Delivery to αJ and payout Wt
The two jigs (12 (jig unit consisting of 141) Ul) existing in a docked state at the payout position 0 can be freely transferred to the other jig unit U.

To explain this in detail, at each lower end of the elevating frame αJ,
As shown in FIGS. 5 and 6, in addition to the first clamp member Cυ for the second jig (14), a second clamp member (2) for the first jig α2 is provided; A positioning bin @ and the first clamp member (21) are attached to the lower surface of the jig α41U (bracket) (151) fixed to the reversing shaft (15a) at each mounting base # (14kl) before and after the second jig α4. The positioning pins α51 for docking described above are planted on each of the seven lunges (12b) at the front and rear of the first sleeper (1z), and the When docking both jigs a21 (141), the bin (1
51 into the mounting base (14b) so that the 7 langes (12b) are superimposed on the lower surface of the mounting base (14b), and the second clamp member (22K gold, linked to the clamp cylinder (22a) A clamp arm (22c) i connected via a 4" flange (22b) i is provided, and the arm (22c) is configured to be able to swing freely toward the lower surface of the 7 flange (12b). Both jigs α'aa4
J + Docking the arm (22c) i 7
If the swinging awn is provided on the lower surface side of the flange (12b), the 7 langes (12b) and the mounting base (14b) are clamped and fixed between the bracket (13b) in a superposed state, that is, the 1st
The anchorage 2 was fixed to the elevating frame 0.31 in a state where it was tonked by the second jig (141).

At the payout position O, a jig exchange conveyor (24) is installed horizontally, and a jig storage device is connected to the conveyor (24) and can freely stock jig units U in multiple stages above and below on both the left and right sides. ii□□□ All arranged and the corresponding equipment fi! The elevator top provided in [25) made it possible to freely replace the jig unit U between the conveyor G4) and the device (29).

The first clamp member (211) described above is a clamp bar having an engaging portion (2l b) at the lower end that can be freely engaged and detached from the lower surface of the mounting base (j4b) by the actuator (21a) on the bracket (13b). (21o) is configured to be able to swing and move up and down, which is conventionally known and detailed explanation thereof will be omitted.

Next, to explain the work procedure for replacing the jig, the first jig (121) is transported empty to the welding position B by moving the lower truck (1) forward, and then the lifting frame α3 is lowered to replace the second jig Q.
□ 41 is docked to the first jig (121), and in this state, the second clamp member is fully operated to tighten the first jig tJ'a.
k is fixed to the elevating frame U as described above, and then the elevating frame fi
31 and attach the first jig (121' to the lower truck i).
It is lifted from l+ and conveyed to the payout position tto by the advancement of the upper cart (6), and after this conveyance, the lift frame (13't-
At the same time as lowering the first clamp member Cυ and the second clamp member (the operation of the two is released and the first jig α2 is docked with the second jig C14), the jig is replaced in preparation for the dispensing position C. transfer onto the conveyor (2IO).

Next, the used jig unit U transferred to the conveyor (2) is replaced with the jig unit U to be used next taken out from the jig storage device (to), and the next jig unit)
The first sleeper (121) and the second sleeper (141) of U are fixed to the elevator frame 03 by the operation of the first clamp member Cυ and the second clamp member (22) while they are in the docked state, and this is fixed to the elevating frame 03 as described above. The first jig (
1z is placed on the bottom truck (6), and in this state, the operation of the second crank member (c) is released and transferred to the first jig a'a'' + core upper truck (6).

In addition, to replace the jig unit U described above, after moving the used jig unit U to the conveyor (241), raise the elevating frame (131'!r) once, and move the cornit U to the conveyor Q. The operation of (a) moves the jig unit U from the dispensing position O to the right in FIG. After transporting the tool unit U to the welding position B as described above, the used jig unit U is transferred to the device f.
It is transported to the (c) side and stored there.

As described above, according to the present invention, the first jig on the lower truck is delivered to the lifting frame provided on the upper truck in a state where it is docked with the second jig, and is transported to the dispensing position, and at the dispensing position, the other jig is Unlike the jig that replaces the jig at the workpiece set position, it is possible to replace the jig with the tool unit completely, and it secures a wide space and work space for placing the workpiece at the set position, making it easier to perform work set work. It has the effect of improving workability.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an automatic welding device for motorcycles to which the device of the present invention is applied, Fig. 2 is a side view taken from line ■-n in Fig. 1, and Fig. 3 is a A front view when the jig is replaced as seen from the -■ line, Fig. 4 is a side view when the first jig and the second jig are tonked at the welding position, Fig. 5 is an enlarged side view of the main parts, FIG. 6 is a cross-sectional view taken along the line ■--■ in FIG. 5. (1)...Lower chorus (6)...Upper truck α force...First jig αJ...Elevating frame enclosure...Second Jig ('13)・
...First clamp member Q3...Second clamp member W...Work A...
...Work set position B...Welding position 0
...Dispensing position U...Jig unit 7) 2 people outside

Claims (1)

[Claims] A lower trolley is provided that is reciprocally movable between a workpiece setting position and a welding position in front of the welding position, and an upper trolley that is reciprocatable between the welding position and a payout position in front of the welding position, and the workpiece is set on the lower trolley. and a second jig that receives a workpiece on the first jig via a vertically movable lifting frame suspended from the upper carriage. In addition to the first clamp member for the second jig, a second clamp member for the first jig is provided on the lifting frame,
The first jig is docked to the second jig at the welding position and can be delivered from the lower truck to the elevating frame and freely transported to the dispensing position, and both jigs in the docked state at the dispensing position are A jig exchange device for an automatic welding device, characterized in that a jig unit consisting of a tool can be exchanged with another jig unit.