JP2539898Y2 - Jig skit changer - 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 exchanging jig skits which is used when an arc welding robot performs welding of a vehicle component such as a seat frame.

[0002]

2. Description of the Related Art Conventionally, welding of vehicle parts having an arc welding structure such as a seat frame has been performed by an arc welding robot (hereinafter referred to as an arc welding robot).
This is usually done using a “robot”. In that case, a jig for positioning the workpiece (hereinafter, referred to as “robot”) is usually used.
"Jig skit"). This jig skit is usually configured to be compatible with multiple types of workpieces from the viewpoint of reducing capital investment or saving installation space, so that even if the product type is changed, The work could be positioned at an appropriate position without changing the tool skit, and efficient production could be maintained without lowering the operation rate of the robot.

However, in recent years, with the diversification of user tastes, for example, seat variations have increased,
This has led to a wide variety of seat frame models, making it difficult to share jig skits, and in some cases, changing the jig skits depending on the seat frame model. It has become

Therefore, conventionally, as shown in FIG. 6, a plurality of sets of robot units (a), (b), (c),... In which two jig skits are arranged within the movable range of the robot R are installed. The jig skits (a) to (f) of each unit are arranged in different types corresponding to various types of seat frames so that a multi-type seat frame can be produced in parallel. In addition, it was possible to cope with multi-kind production without having to replace the jig skit.

[0005]

However, the conventional jig skit arrangement has the following problems.

First, if the number of types of seat frames to be produced increases, it is necessary to prepare a new jig skit in accordance with the increase and further increase the number of robot units, that is, robots, corresponding to the jig skit. Therefore, not only does capital investment increase, but also a problem arises in that a new installation space must be secured.
This is because the number of jig skits that can be installed within the operating range of the robot is limited.

Secondly, there is no problem in producing the same number of seat frames of each type. However, if the production quantity varies among the models, it is necessary to add a robot having a large production quantity. On the other hand, there is a problem that the operating rate of robots with low production volume must be reduced and the operating rate of robots as a whole decreases, and by increasing the operating rate of robots as much as possible, capital investment can be saved or space can be saved. It was difficult to make effective use of this.

Third, when a model change of a vehicle is performed, usually several prototype vehicles are manufactured, and tryout (trial processing) of parts (prototypes) used in the prototype vehicle is performed. In such a case, it is difficult to use a robot that is actually performing production, so it is necessary to prepare a separate tryout robot and perform it offline, thus necessitating extra investment and making a prototype. It was difficult to make a sufficient evaluation of

The present invention has been made in view of the above-mentioned conventional problems. Therefore, even if the number of product types increases, it is not necessary to increase the number of robots, and the operating rate of the robots is increased as much as possible. This saves capital investment or makes effective use of installation space. In addition, when changing the model of a vehicle, it is possible to try out using a robot that is currently in production without using a dedicated robot. It is an object of the present invention to provide a tool skit changing device.

[0010]

According to the present invention, in order to solve the above-mentioned conventional problems, a plurality of jig skits respectively corresponding to a plurality of types of workpieces are prepared, and a part of the jig skits is cycled to perform an arc welding robot. For the workpiece positioning during arc welding by the above, the remainder branches off in the middle of the cycle and is made to stand by at the installed standby station, and if necessary, the jig skit that cycles and the jig skit that waits at the standby station It is characterized by having a replaceable configuration.

[0011]

According to the above construction, when the type of a product increases, a jig skit corresponding to the type is prepared and made to stand by at a standby station, and is circulated appropriately so that a new robot is not added. Can respond to production.

Further, since the type of the jig skit to be cycled is variously changed and the cycle is rotated, one robot can be fully operated even if there is a variation in the number of products between the types.

Further, the jig skit for tryout is made to stand by in the waiting station, and is appropriately replaced and cycled, so that the tryout can be performed by using the robot in actual production.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. In the following description, the work W
Are components constituting a seat frame by welding, and a case where a product is a seat frame will be described as an example.

FIG. 1 shows a jig skit changing apparatus A of this embodiment.
(Hereinafter referred to as “this device”). This apparatus A includes an arc welding robot R, first to sixth stations 1 to 6, and four types of jig skits 7 to 10 each configured to correspond to a work W having a different form. It is prepared as.

Here, the robot R is an articulated robot in which a predetermined operation is programmed in advance, and moves the welding torch along a programmed welding line corresponding to each of the jig skits 7 to 10. At the same time, the designated welding conditions are output to a welding machine to perform the intended arc welding, which is conventionally known, and the description thereof will be omitted.

The first to fourth stations 1 to 4 are arranged to cycle the jig skit 7 (or 8, 9, 10) to the robot R, and the second station 2 serving as a work station is provided. Fourth stations 4 are immovably arranged directly below the robot R and below the second station 2, respectively. Hereinafter, the height of the second station 2 is referred to as “working height”, and the height of the fourth station 4 is referred to as “forwarding height”.

The first and third stations 1, 3
Is supported so as to be able to move up and down between the “working height” and the “forwarding height”, and transfer the jig skit 7 (or 8, 9, 10) between the second and fourth stations 2 and 4. The jig skit 7 (or 8, 9, 10) is moved (cycle circulation) at each station in the order of first → second → third → fourth. , Arc welding of the workpiece W, and a series of welding processes up to discharge of the product are executed by sequence control.

First, the jig skits 7 to 10 will be described. As shown in FIG. 2, the jig skit 7 has a sub base 7b opposed to and supported by a common base 7a via a plurality of support columns. An air connection port 7c is provided at an end of the common base 7a. A connector 7d for connecting electric wiring is installed in parallel.

Further, positioning blocks 7e to 7e for mounting the workpieces W to be welded to each other at predetermined positions on the sub base 7b, and the workpiece W mounted on the positioning blocks 7e are pressed down. There are provided clamping devices 7f to 7f for fixing, and a lift-up bar 7g for lifting the workpiece W after welding, that is, a product (seat frame) and detaching it from the positioning block 7e.

The work W is clamped or unclamped by swinging the clamp pawl 7i in the vertical direction by an air cylinder 7h having a predetermined stroke. Each air cylinder 7h
7h are connected to the air supply port 7c via an electromagnetic valve (not shown), and a predetermined operation is performed by switching and controlling the electromagnetic valve in a state where an air source is connected to the air supply port 7c. It is supposed to.

The lift-up bar 7g is formed by combining strips in a substantially "O" shape as shown in the figure. The lift-up bar 7g is supported on the upper surface side of the sub-base 7b by slide bars 7j, 7j, and is vertically parallel. It is designed to slide.

Although not shown, the common base 7
In the approximate center of the position a, two positioning holes 7k, 7k for positioning the first and second stations 1 and 2 are formed at predetermined intervals as described later (see FIG. 3). ).

The jig skit 7 is configured as described above.
The other jig skits 8 to 10 have substantially the same configuration except that the positioning blocks 7e to 7e are different in shape or arrangement in correspondence with the work W having different forms. Although not shown in FIG. 1, the jig skits 7 and 8 are cycled to the first to fourth stations 1 to 4, and the jig skit 9 is moved to the fifth station 5.
And a jig skit 10 is arranged at the sixth station 6, respectively.

Next, the first to sixth stations will be sequentially described. First, the first station 1 sets the work W on the jig skit 7 (or 8, hereinafter the same), and transfers the set work W to the second station 2.
It is a station for waiting in front of the station.

The first station 1 is supported by a lifting device 1e as shown in FIG. 3, and is capable of moving up and down between an upper "working height" and a lower "forwarding height". . The air cylinder 1f of the lifting / lowering device 1e is an intermediate stop cylinder, and the first station 1 has a height approximately halfway between the above-mentioned "heights" (hereinafter referred to as "set height").
You can stop at. Accordingly, the first station 1 receives the (empty) jig skit 7 from the fourth station 4 at the “forwarding height”, and then moves up to the “set height” to work on the jig skit 7. After the work W is set, and then the work W is raised to the “work height” and waits, the work W is carried out to the second station 2 together with the jig skit 7.

The first station 1 includes a transport conveyor 1a, a positioning unit 1b, an air supply unit 1c, and a relay unit 1d.

The transport conveyor 1a is driven by an electric motor (not shown) which can be rotated forward and backward. As shown in FIG. 4 or FIG. By rotating the two endless belts arranged in a parallel manner along the belt, the jig skit placed on both belts can be moved in both directions, and the moving direction is the rotation direction of the electric motor. Is controlled by controlling the speed, and the speed is controlled to decelerate or stop as appropriate.

The positioning unit 1b is for positioning the loaded jig skit 7, and as shown in FIG. 3, the positioning pin is raised by an air cylinder.
The jig skit 7 is inserted into positioning holes 7k, 7k formed in the common base 7a of the jig skit to position the jig skit 7 in a state of being lifted from the transport conveyor 1a by a predetermined amount.

Further, the air supply unit 1c
The relay unit 1d is for supplying compressed air to the jig skit 7 carried into the station 1. The relay unit 1d is for transmitting and receiving electric signals to and from the jig skit 7. Is supported so as to be movable toward and away from the jig skit 7, and is automatically connected to and disconnected from the air connection port 7 c and the connector 7 d of the jig skit 7. I have.

Thus, when the jig skit 7 is carried into the first station 1, the positioning unit 1
b, the jig skit 7 is moved by a predetermined amount on the conveyor 1a
After that, the two units 1c and 1d approach the jig skit 7 and are connected to the air connection port 7c.
And the connector 7d.
To supply compressed air to and send and receive electrical signals.
Conversely, when the jig skit 7 is carried out of the station 1, both units 1c and 1d are retracted in advance and disengage from the air connection port 7c and the connection connector 7d, and supply of compressed air to the jig skit 7 and The transmission and reception of the electric signal is stopped.

When the air supply unit 1c is connected to the air connection port 7c, the work clamping air cylinder 7h can be operated, while the relay unit 1d.
Is connected to the connector 7d, the stroke end of the air cylinder 7h, that is, the clamp / unclamp of the work W can be detected and the electromagnetic valve can be operated, and further, the type determination of the loaded jig skit 7 ( That is, which jig skit among the jig skits 7 and 8 is determined).

Next, the second station 2 is a station for arc welding the work W by the robot R,
It is arranged immediately below the welding robot R. This second
The station 2 also includes a conveyor 2a, a positioning unit 2b,
An air supply unit 2c and a relay unit 2d are provided. Note that the jig skit 7 is connected to the first conveyor 2a.
It is sufficient if the electric motor can move only in the direction from the station 1 to the third station 3 (left direction in the figure). Therefore, the electric motor rotates only in one direction and decelerates and stops appropriately. Is controlled.

A stop absorber 2e is attached to the end of the second station 2 on the side of the third station, so that the jig skit 7 carried in from the first station 1 has an impact upon stopping. Is absorbed and smoothly stops at the fixed position in the second station 2. The stopping absorber 2e is supported so as to be able to move up and down, so that when the jig skit 7 moves from the second station 2 to the third station 3, the jig skit 7 is lowered so as not to hinder the movement. .

The robot R operates based on the type of the jig skit 7 determined in the first station 1,
The welding torch is moved along a previously programmed welding line to perform arc welding on the workpiece W.

Next, the third station 3 takes out the workpiece W (product = sheet frame) arc-welded in the second station 2 and carries out the empty jig skit 7 after taking out the product to the fourth station 4. In addition, the jig skit 7 or 8 is further connected to the fifth or sixth jig.
It is a station for exchanging with a different type of jig skit 9 or 10 arranged in the stations 5 and 6. The third station is also supported by an elevating device having the same configuration as the elevating device 1e of the first station 1 so as to be able to move up and down between the "working height" and the "forwarding height".

As shown in FIG. 5, the third station 3 receives the jig skit 7 from the second station 2 and sends an empty jig skit 7 or 8 to the fourth station 4. Conveyor 3a
And an exchange conveyor rotating in a direction orthogonal to the conveyance direction of the conveyance conveyor 3a and moving the jig skit 7 or 8 (or 9, 10) with respect to the fifth or sixth station 5, 6. 3b.

The conveyor 3a has a plurality of cylindrical rollers arranged in parallel and connected to each other so that the rotation of an electric motor can be transmitted to the rollers, so that the jig skit 7 or 8 can be carried in and out. It is controlled so that it can rotate in both directions and decelerate and stop appropriately.

The exchange conveyor 3b is a conveyor having the same structure as the conveyors 1a, 2a of the first or second station 1, 2 and has an endless conveyor belt at both front and rear ends of the conveyor 3a. Are arranged in parallel and connected to an electric motor. The electric motor is controlled so as to rotate bidirectionally by rotating the electric motor forward and backward, and to appropriately decelerate and stop.

The exchange conveyor 3b is supported so as to be able to move up and down. The jig skits 7 to 1 are protruded and retracted from the conveyance surface (upper end of each roller) of the conveyance conveyor 3a.
The transport direction of 0 can be switched. That is, the exchange conveyor 3b is
a, the conveyor 3
a becomes effective and the jig skits 7 and 8 are moved in the direction of cycle circulation. Conversely, when the exchange conveyor 3b rises and is positioned above the transport conveyor 3a, the exchange conveyor 3b becomes effective and cures. Ingredient skits 7 to 10
Alternatively, it can be moved between the sixth stations 5 and 6.

Further, an absorber 3 for stopping the jig skit is also provided at the leading edge (left edge in the figure) of the third station 3.
c is attached, so that the second station 2
The impact of the jig skit 7 carried in from when stopped is reduced, and the jig skit 7 smoothly stops at the fixed position. The stop absorber 3c of the third station 3 does not need to move up and down unlike the stop absorber 2e of the second station 2, and is fixed.

Further, as shown in FIG. 1, the third station 3 has a lift device 3d for taking out the product from the jig skit 7 upward, and the product taken out by the lift device 3d is placed on the near side in the figure. A kicker device 3e is provided for extruding and discharging the product to a shooter 21 from a product take-out port 20b described later. Both devices 3d and 3e are driven by air cylinders and are controlled to perform predetermined operations.

Next, the fourth station 4 is an intermediate station for forwarding the jig skit 7 from the third station 3 to the first station 1, and is located below the second station and has a Sa "is arranged. The fourth station 4 is equipped with a transport conveyor 4a having the same configuration as the transport conveyor 2a provided in the second station 2, and the transport direction is reversed.

The first to fourth stations 1 to 4 are configured as described above, and the jig skits 7 and 8 are sequentially cycled to the respective stations, whereby sequence control is performed so that a series of welding steps are performed. You.

Next, the fifth and sixth stations 5, 6
Are stations for holding the jig skits 9 and 10, and are arranged adjacent to the third station 3 at both upper and lower “heights” of the “working height” and the “forwarding height”, respectively.

Both stations 5 and 6 also have the first
Alternatively, the conveyors 1a, 2 of the second stations 1, 2
a, or a conveyor having the same configuration as the exchange conveyor 3b of the third station 3 is provided, and the jig skits 7 to 10 are carried in and out of the third station 3 by controlling the respective electric motors. I can do it.

Although not shown, each of the stations 5 and 6 is provided with a discriminating device having the same function as the discriminating device provided in the first station 1.
Thus, it is possible to always determine which jig skit is waiting at the fifth or sixth station 5, 6.

As described above, the four types of jig skits 7 to 10 and the first to sixth stations 1 to 6
6 are configured, each of which is controlled in sequence and performs a predetermined operation sequentially, so that a series of welding steps is performed, and jig skits are exchanged as appropriate.

In FIG. 1, reference numeral 20 denotes a box-shaped protection fence installed on the outer periphery of the apparatus A, and reference numeral 20a denotes a work setting opening for setting the work W on the jig skit of the first station 1. Reference numeral 20b denotes an opening for discharging the product opened corresponding to the third station. Reference numeral 21 denotes a shooter for receiving the product pushed out of the apparatus A through the opening 20b by the kicker device 3e. Numeral 22 is a duct of a dust collector installed to absorb the arc fume discharged during arc welding and maintain a good working environment.

Next, the operation of the apparatus A configured as described above will be described. As described above, two types of jig skits 7 and 8 are circulated in the cycles of the first to fourth stations, a jig skit 9 is provided in the fifth station, and a jig skit 9 is provided in the sixth station 6. 10 are waiting.

First, the operation of one cycle will be described sequentially from the first station. After a predetermined jig skit 7 is set in the first station 1 and floated from the conveyor 1a by the positioning unit 1b to be positioned, the first station 1 is set to the "set height".
And the work W is set on the jig skit 7.
At this time, in the second station 2, the jig skit 8
Arc welding of the work W set in the workpiece W is performed.

After setting the work W on the jig skit 7 and operating the type selector switch 11b and the start switch of the operation panel 11, the work W is clamped by the clamping device 7f.
7f, then the first station 1 is raised to the "working height" by the lifting device 1e,
At that position, the process stands by until the welding work in the second station 2 is completed.

When the work of welding the work W set in the jig skit 8 at the second station 2 is completed, the conveyor 2a of the second station 2 is activated, and the welded work W (hereinafter, referred to as the jig skit 8). At the same time as the “product” is carried into the third station 3, the transport conveyor 1 a of the first station 1 is activated and the work W is carried into the second station 2 together with the jig skit 7. When the conveyor 1a is started, the air supply unit 1c and the relay unit 1d are retracted and removed from the jig skit 7, and the positioning unit 1b is lowered to move the jig skit 7 on the conveyor 1a. The work W is then sent out to the second station 2 together with the jig skit 7. When the jig skit 7 moves to just before reaching the home position of the second station 2, the conveyor 2a is decelerated, and the jig skit 7 is smoothly stopped at the home position by the stopping absorber 2e to complete the loading. .

When the jig skit 7 is carried into the second station 2, the jig skit 7 is lifted and positioned from the conveyor 2a by the positioning unit 2b. Thereafter, the air supply unit 2c and the relay unit 2d are moved. It moves forward and is connected to the air connection port 7c and the connection connector 7d. Thereby, the supply of air and the transmission and reception of electric signals can be performed at the second station 2, the clamp devices 7f to 7f are operated, and the work W is again clamped on the jig skit 7, and the model of the jig skit 7 The signal is input to the control device of the robot R. The robot R operates on a predetermined trajectory based on the input format signal,
The arc welding of the work W is performed.

During this time, the product is discharged from the jig skit 8 carried into the third station 3, and thereafter, is sent to the first station 1 via the fourth station 4. Then, the next work of setting the work W is performed.

When the welding by the robot R is completed, the clamp devices 7f to 7f are unclamped, the air supply unit 2c and the relay unit 2d are retracted and removed from the jig skit 7, and thereafter, the positioning unit 2b
Is lowered and the jig skit 7 is placed on the transport conveyor 2a again.

Next, the stopping absorber 2e descends and the conveyor 2a starts, and at the same time, the conveyor 3a of the third station 3 starts. Thereby, the jig skit 7 on which the product is placed is transported from the second station 2 to the third station 3.

When the jig skit 7 is carried into the third station 3, the lift device 3d approaches the jig skit 7 and lifts the lift-up bar 7g, whereby the product is taken out above the jig skit 7. After that, the product is discharged by the kicker device 3e to the discharge chute 21 through the product outlet 20b by the kicker device 3e.
Collected outside.

The jig skit 7 from which the product has been taken out is lowered together with the third station 3 by the elevating device to reach the "return height", and then the transport conveyor 3a of the third station 3 is activated in the unloading direction. At the same time, when the conveyor 4a of the fourth station 4 and the conveyor 1a of the first station 1 are started in the same direction as the unloading direction, the jig skit 7 is moved from the third station 3 through the fourth station 4, The first located at the "forwarding height"
It is forwarded to station 1. When the jig skit 7 is carried in, the first station is raised to the "set height" by the elevating device 1e and stopped, and the next work W is set.

At this time, in the second station 2, a new work W set on the jig skit 8 is being welded.

As described above, one cycle of the apparatus A is completed by the jig skit 7 sequentially circulating the first, second, third, fourth, and first stations. Then, in parallel with this, the jig skit 8 is similarly cycled, so that the welding of the two forms of the work W is performed.

Next, when the type of the workpiece W to be welded is changed, that is, the jig skit 7 or 8 is replaced with the jig skit 9
Or, the case of changing to 10 will be described. When the jig skit 7 is replaced with the jig skit 9 waiting at the fifth station 5, when the jig skit 7 is located at the second station 2 and welding is being performed, the operation panel 1
When the type 1 selector switch 11b is operated, the transport conveyor 5a of the fifth station is activated, and the exchange conveyor 3b of the third station 3 is raised and activated. Thereby, the jig skit 9 waiting at the fifth station 5 is carried into the third station 3. When the jig skit 9 is carried into the third station 3, the exchange conveyor 3b stops and descends.

Next, the third station 3 is lowered to the "feeding height" by the lifting device with the jig skit 9 placed thereon. When the conveyor 3a of the third station 3 and the conveyor 4a of the fourth station 4 are activated, the jig skit 9 is moved to the fourth station 4.
Forwarded to The jig skit 9 temporarily waits at the fourth station 4, and the third station 3 sets the "work height".
Return to Next, the welding at the second station 2 is completed, the jig skit 7 is conveyed to the third station 3, and the jig skit 8 is conveyed to the second station 2, respectively. ”. Thereafter, the conveyors 4a and 1a of the fourth and first stations 4 and 1 are activated, and the jig skit 9 waiting at the fourth station 4 is carried into the first station 1.

On the other hand, after welding is completed, the product is discharged from the jig skit 7 carried into the third station 3. Thereafter, the exchange conveyor 3b of the third station 3 rises and starts up in the direction opposite to the direction in which the jig skit 9 was unloaded, and the transfer conveyor 5a of the fifth station 5 starts up in the opposite direction. I do. Thereby, the jig skit 7 is carried into the fifth station 5 and stored therein.

As described above, the jig skit 8 and the replaced jig skit 9 are cycled through the first to fourth stations 1 to 4 in the same manner as described above, and the work W in a new form is welded. .

It should be noted that the jig skit 7 is replaced with the jig skit 10 waiting at the sixth station 6 in substantially the same manner. That is, when the third station 3 is at the “forwarding height”, the jig skit 10 is carried into the third station 3 from the sixth station 6 and
While being sent to the station 1, the third station 3 is lowered to the "feed height" after the product is discharged, and the jig skit 7 is carried out to the sixth station 6 and stored.

This example is configured as described above.
According to this configuration, the following operation and effect can be obtained. That is, according to the jig skit changing apparatus A of the present embodiment, various types of jig skits 7 to 7 corresponding to various types of seat frames are provided.
10 are prepared, of which two types of jig skits 7, 8
Is cycled and the other two types of jig skits 9 and 1
0 is waited at the fifth and sixth stations 5, 6, and the jig skit 7 or 8 can be appropriately replaced with the waiting jig skit 9 or 10, while the robot R operates the determined jig skit. Control is performed so that the workpiece W is welded along various types of movement trajectories based on the model.

As a result, four types of seat frames can be produced by one welding robot R, and the jig skit can be replaced and discriminated by the robot R.
Is performed in parallel with the welding operation (production of the seat frame), the seat frame can be produced by arbitrarily setting the model and quantity without lowering the operation rate of the robot R. Therefore, when the number of types of seat frames to be produced increases, the robot R
It is not necessary to increase the number of units, and one robot can be operated at the highest possible operating rate to respond to production.
Efficient capital investment or effective use of installation space can be achieved.

Further, the four kinds of jig skits 7 to 10 can be arbitrarily exchanged and cycled, and the robot R operates according to the determined jig skit model. It is possible to easily and efficiently cope with a change in the type of the frame.

Further, at the time of trial out of the prototype performed at the time of model change, the jig skit for the prototype is made to stand by at the fifth or sixth station, and is appropriately replaced with the jig skit in the cycle. By circulating, it is possible to perform a try-out by interrupting the actual production without lowering the operation rate of the robot R. Therefore, it is not necessary to separately add a robot dedicated to tryout, so that unnecessary investment or insufficient evaluation of the prototype can be eliminated, and it is possible to easily respond to a model change.

Although not described in detail, a storage rack 15 capable of storing a large number of jig skits is attached to the fifth or sixth station as shown in FIG. By appropriately selecting and replacing the jig skits, it is possible to develop the apparatus A so that a single robot can efficiently produce a multi-type seat frame.

In this embodiment, the case of producing a seat frame has been described by way of example. However, the present invention is not limited to this, and the present apparatus A is applicable to any vehicle parts manufactured by welding. It is.

[0073]

[Effect of the Invention] Since the present invention is configured as described above, it is possible to efficiently produce a multi-type welding part with one robot, thereby increasing the efficiency of capital investment or effective installation space. It can be utilized.

Further, it is possible to easily cope with a change in the type of a welded part without lowering the operation rate of the robot.

Furthermore, the trial-out of the prototype can be performed using a robot in actual production.
There is no need to prepare a dedicated robot separately, and efficient investment or sufficient evaluation of prototypes can be achieved, and it is possible to easily respond to vehicle model changes.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a jig skit changing apparatus according to an embodiment of the present invention.

FIG. 2 is an overall perspective view of a jig skit.

FIG. 3 is a side view of a first station and a jig skit.

FIG. 4 is an operation explanatory view of the jig skit changing apparatus.

FIG. 5 is a layout diagram of first to sixth stations.

FIG. 6 shows two jig skits for the arc welding robot.
1 is an overall view of a conventional welding system arranged on a surface.

[Explanation of symbols]

A: jig skit changer, R: arc welding robot,
W: Work 1-6: First to sixth stations 1a, 2a: Conveyor, 1b, 2b: Positioning unit 1c, 2c: Air supply unit, 1d, 2d: Relay unit 1e: Elevating device, 1f: Intermediate stop Air cylinders 2e, 3c: Stop absorber, 3d: Lift device, 3
e: kicker device 7-10: jig skit 7a: common base, 7b: sub base, 7c: air connection port, 7d: connection connector, 7e: positioning block,
7f ... clamping device, 7g ... lift-up bar, 7h ...
Air cylinder, 7i ... Clamp claw, 7j ... Slide bar 11 ... Operation panel, 11a ... Start switch, 11b ... Model selector switch 15 ... Jig skit storage rack 20 ... Protective fence, 20a ... Work set opening, 20b
… Product discharge opening 21… Product discharge shooter, 22… Dust collector duct

Claims (1)

(57) [Scope of request for utility model registration] 1. A jig skit changing device provided alongside an arc welding robot for exchanging a jig skit for positioning a work to be welded by the arc welding robot in accordance with a type of the work. A plurality of jig skits corresponding to multiple types of workpieces are prepared, and a part of them is cycled and used for workpiece positioning when welding workpieces by the arc welding robot, and the rest is branched and installed in the middle of the cycle. A jig skit that is made to stand by at a designated waiting station and that is cycled as needed and a jig skit that stands by at the waiting station are exchangeable.