KR970010895B1 - Conveyance machine of welding zig - Google Patents

Abstract

None.

Description

Feeding device of welding jig

1 is a partially broken side view showing a main part of an example of a conveyance apparatus for a welding jig according to the present invention;

2 is a partially broken plan view of the main part in the example shown in FIG.

3 is a side view showing an example of a conveying apparatus for a welding jig according to the present invention together with a welding jig conveyed by it.

4 is a diagram useful in explaining the operation of the example shown in FIG.

5 is a plan view of an example shown in FIG.

FIG. 6 is a diagram useful in explaining the operation of the example shown in FIG.

* Explanation of symbols for main parts of the drawings

1A, lB: Lifting rail 2: Fixture

3: carrier 3A: welding jig

4: carrier bar 7,38: pneumatic cylinder

8 motor 10 coupling member

15: member to be joined 25: link mechanism

35: prop 36: clamp member

42: pinion gear 43: rack

This invention relates to the conveyance apparatus of the welding jig which conveys the welding jig which supports the workpiece to which welding was performed using the lifting rail.

In the vehicle assembly line, attachment by welding of various parts to a workpiece such as an upper body or a lower body constituting a vehicle body is performed at a welding work station. In general, a plurality of welding work stations are installed, and a carrier for forming a welding jig supporting a work piece is sequentially transported at regular intervals, and a panel black or reinforcing member is provided on the work supported by the welding jig. Are welded.

As a conveying apparatus used for conveying such a conveyance at regular intervals, the lift-and-carry type which is provided with the elevating rail provided along the some work bench is known.

In such a lift and carry type conveying apparatus, for example, a conveying bar that reciprocates with respect to the lifting rail is provided. When the lifting rail is placed in the lifting position, the conveying bar is combined with the carriage disposed on the lifting rail, and the carriage is advanced to move from one platform to the next, or the lifting rail is placed in the lowering position. When there is, the engagement with the vehicle is released and retracted so as to return to the original position, whereby the pitch of the vehicle is carried out.

For example, in JP-A-63-306110, as a coupling means for selectively coupling a carriage and a transportation bar, a coupling ring in which a lifting and lowering movement is arranged on a carriage equipped with a jig supporting a workpiece is provided. , A drive unit including a block installed at a carrier bar and a cylinder installed on a transport vehicle and moving a coupling ring up and down through a rod, the coupling ring is coupled to the block, and the coupling ring is released from the coupling with the block. It is proposed that the cylinder be obtained along the elevating movement of the engaging ring.

In a conveying apparatus in which a conveying vehicle for forming a welding jig supporting a workpiece is arranged on a lifting rail, and the conveying bar performs an evenly spaced conveyance of the conveying vehicle, the conveying vehicle is easily and accurately positioned with respect to the welding work station. In order to achieve this, it is desirable to reduce the weight of the transport vehicle. However, when a drive unit including a cylinder for selectively engaging the transport vehicle and the transport bar and releasing the transport is arranged in the transport vehicle disposed on the lifting rail as described above, the weight of the transport vehicle is increased by the drive unit. have. In addition, in the drive unit including the cylinder, there is a problem that it is difficult to shorten the time required for conveyance of the transport vehicle by extending the rod installed in the cylinder after positioning the transport vehicle and the transport bar.

In view of this point, the present invention provides a transport vehicle in a welding work area by using a transport member that forms a transport jig for supporting a welded workpiece on a lifting rail and reciprocates along the lifting rail. In the case of conveyance, the selective coupling and disengagement of the transport vehicle and the transport member can be carried out without complicating the structure of the transport vehicle to increase the weight and shorten the time required for transporting the transport vehicle. An object of the present invention is to provide a conveying apparatus for a welding jig.

The conveying apparatus of the welding jig according to the present invention to achieve the above object is formed on the lifting rail and the lifting rail laid along the welding working area to form a welding jig for supporting the workpiece to be welded in the welding working area. Elevators that selectively take up the coupling member and the lifting rails on which the carriages are installed so that the carriages are supported by the lifting rails and the state where the carriages are supported by the stators by lowering them from the lifting position on the lifting rails. And a conveying member for reciprocating along the elevating rail, a to-be-engaged member installed on the conveying member and selectively engaged with and released from the engaging member, and a conveying member based on the coupling member being coupled to the engaged member. On the basis of coupling the carriage to the member to be joined by moving from the first position to the second position. Moving the conveying vehicle from the first position to the second position on the conveying member, and returning from the second position to the first position on the conveying member based on separation of the engaging member from the member to be joined. It is equipped with a conveying drive mechanism for carrying out an operation, and the member to be engaged is engaged with the engaging member when the lifting rail is placed in the ascending position by the elevating mechanism, and is engaged when the lifting rail is lowered from the ascending position by the elevating mechanism. The engagement with the member is configured to be released.

In the conveying apparatus of the welding jig which concerns on this invention comprised as mentioned above, the welding member provided in the transport vehicle which forms a welding jig, the to-be-engaged member etc. which were provided in the conveying member was easily mutually coupled along the lifting motion of an elevating rail, or non-combined. The conveyance of the conveyance vehicle by the conveyance member which moved to the 2nd position from the 1st position based on which the conveyance vehicle and the conveyance member became mutually engaged with each other through these engaging member and the to-be-engaged member was performed. All.

Each of the coupling member and the member to be coupled adopts an extremely simple configuration, whereby an increase in the weight of the transport vehicle is prevented.

Furthermore, the selective engagement and disengagement of the engaging member and the member to be engaged is performed along the elevating motion of the elevating rail, thereby reducing the time required for conveyance of the transport vehicle.

EXAMPLE

3 and 4 show an example of the conveying apparatus of the welding jig according to the present invention together with the welding jig conveyed by it.

In FIGS. 3 and 4, welding station S1, S2 and S3 are each provided with a fixing table 2, and these welding operation stations S1, S2 and S3 are respectively provided. Each of them has a pair of lifting rails lA and lB adjacent to it, which are placed above the fixing table 2. In each of the welding work stations S1, S2, and S3, the lifting rails 1A and 1B are connected with the same length and form a plurality of welding jigs 3A at the same time. ) Is arranged.

Further, a conveyance bar 4 extending along the welding work stations S1, S2, and S3 is disposed between the elevating rails 1A and 1B and the fixed base 2. The lifting rails lA and lB are lifted by the operation of the pneumatic cylinder 7, while the transfer bar 4 is lifted by the operation of the motor 8 with the reduction gear. Will reciprocate.

In addition, a plurality of engaged members 15 arranged along the extending direction of the lifting rails 1A and 1B are provided on the upper surface of the transfer bar 4.

In each of the job operations stations S1, S2, and S3, the transport vehicle 3 is formed by, for example, a plurality of welding jigs 3A formed by the lower vehicle body member constituting the vehicle body of the automobile. The phosphorus workpiece W is supported and arranged on the lifting rails 1A and 1B via a plurality of rotary rollers 9. In the workpiece | work W, each of parts, such as a panel or a reinforcement member, is welded by the welding robot which is not shown in each of the welding work stations S1, S2, and S3.

A plurality of coupling members 10 are installed on the lower surface of the transport vehicle 3, and the coupling member 10 includes a plurality of coupling members installed in the transfer bar 4 when the transfer bar 4 is in a stopped state. arranged at a position opposite to one of l5).

The engaging member 10 provided in the transport vehicle 3 and the engaged member l5 provided in the conveyance bar 4 have the foundations 11 and 16 as shown in FIGS. 1 and 2, respectively. Have.

The base 11 of the coupling member 10 is provided with a pair of protrusions 13 protruding from each other along the width direction of the transport vehicle 3.

On the other hand, the base 16 of the member 15 to be engaged is provided with a wall 18 extending upwardly from each other, forming a relatively large space 17 from each of the two portions extending along the conveyance bar 4. In each of the walls 18, a pair of openings 21 are formed at the distal end along the extending direction of the lifting rails 1A and 1B by the wall 18 and the protruding vicinity 20. As shown in FIG.

On the other hand, as shown in FIG. 5, each of the elevating rails 1A and 1B is supported by the pair of link mechanisms 25 so that they can be elevated.

The link mechanism 25 supporting the lifting rail lA has a flat member 27 attached to the lifting rail lA and a flat member 28 attached to the fixing table 2, and also the lifting rail lB. The link mechanism 25 for supporting) has a flat member 27 attached to the lifting rail lB and a flat member 28 attached to the fixing table 2.

One side of the link mechanism 25 supporting the lifting rail 1A and one side of the link mechanism 25 supporting the lifting rail 1B is connected to the connecting member 26A extending along the width direction of the transfer bar 4. The other side of the link mechanism 25 supporting the lifting rail lA along the width direction of the transfer bar 4 with the other side of the link mechanism 25 supporting the lifting rail lB. It is connected by the elongate connection member 26B.

And in each of the link mechanisms 25 connected by the connecting member 26A, the flat members 27 and 28 rotate the connecting member 26B as the support shaft, and also by the connecting member 26B. In each of the linked link mechanisms 25, the flat members 27 and 28 rotate the connecting member 26B as the support shaft.

The connecting members 26A and 26B are connected to the connecting members 32 arranged along the extended direction of the transfer bar 4 via the three-way joints 29 and the four-way joints 30, respectively, and the four-way joints. The rod 7a of the pneumatic cylinder 7 is connected to the 30 through the connecting member 33.

The rod 7a of the pneumatic cylinder 7 is stretched along the extending direction of the transfer bar 4. The lifting mechanism is constituted by including a pneumatic cylinder 7 and a pair of link mechanisms 25 supporting the lifting rails 1A and 1B, respectively.

When the pneumatic cylinder 7 provided for the elevating rails lA and lB is operated, the rod 7a is extended, and the flat members 27 and 28 are formed in each of the link mechanisms 25. The rotating member 26A and the black rotate in the direction in which the entire link mechanism 25 is bent and displaced with the supporting shaft 26B as the support shaft. Thereby the lifting rails lA and 1B are guided by the plurality of lifting guides 24 from the ascending position as indicated by the solid lines in FIGS. 3 and 4, with the carriage 3 being lowered. Will be moved to. 3 and 4, they are in the lowered position as indicated by the dashed-dotted line.

In this case, the transport vehicle 3 is in close contact with the upper surfaces of the plurality of struts 35 which are respectively provided on both sides of the fixing table 2. Clamps 36 are respectively connected to two of the plurality of struts 35 which are respectively provided on both sides of the fixing table 2 via the brackets 37.

As shown in FIG. 6, each clamp member 3b is provided with a pneumatic cylinder 38 in an operating state when the transport vehicle 3 is in close contact with the plurality of struts 35. As shown in FIG.

When each of the clamps 36 is in close contact with the plurality of struts 35 by the operation of lowering the lifting rails lA and lB of the lifting mechanism, each clamp 36 is operated by the operation of the pneumatic cylinder 38. As shown by the dashed-dotted line in the figure, the vehicle 3 is pressed down from its upper surface. As a result, when the lifting rails lA and lB are in the lowered position, the carriage 3 is pressed downward by the plurality of clamps 36, and is secured by the fixing table 2 through the plurality of struts 35. In a supported state.

On the other hand, in the carriage 3 and the conveyance bar 4, when the lifting rails lA and lB are in the ascending position, the protrusions 13 are engaged at the coupling member l0 as indicated by the solid line in FIG. Coupled to the groove portion 19 in the member 15, it is in a state coupled to each other.

The carriage 3 and the conveying bar 4, etc., which are in such an interlocking state, have the first projection 13 in the engaging member 10 when the lifting rails lA and lB are lowered from the raised position. As indicated by the dashed-dotted line in the figure, the engagement with the groove portion 19 in the member 15 to be engaged is released, placed in the space 17, and placed in an unjoined state.

In this way, the conveyance truck 3 and the conveyance bar 4 which are put in the non-coupling state are a pair of pairs provided in the to-be-engaged part l5 in the conveyance bar 4 which opposes the engaging member 10 in the conveyance vehicle 3. It is separated from each other through either of the openings 21.

The conveying bar 4 is supported by a plurality of support members 40 arranged on the fixing table 2 as shown in FIG. A pinion gear 42 is attached to the output shaft of the motor 8 which reciprocates the transfer bar 4, and the pinion gear 42 meshes with a rack 43 on the lower surface of the transfer bar 4. have. The conveyance drive mechanism for the conveyance bar 4 is comprised including such a motor 8, pinion gear 42, and rack 43. As shown in FIG.

In the conveyance drive mechanism, the motor 8 rotates for a predetermined period of time, for example, if the lifting rails lA and 1B provided at each of the welding work stations S1, S2, and S3 are in the ascending position. do. As a result, the pinion gear 42 is in a rotational state in which the pinion gear 42 is moved by the distance (1 pitch) slightly longer than the length of the carriage 3 in the direction indicated by the arrow A in FIG. . And along the movement of the rack 43, the counterpart bar 4 is moved to A direction by l pitches. In addition, the motor 8 rotates in reverse for a predetermined period when the lifting rails lA and lB provided at each of the welding work stations S1, S2 and S3 are in the lowered position. As a result, the pinion gear 42 is rotated to move the rack 43 in the direction opposite to the A direction by l pitches, and the conveyance bar 4 moves in the A direction by l pitches according to the movement of the rack 43. Is moved in the opposite direction.

In each of the welding work stations Sl, S2, and S3, the lifting rails lA and lB installed thereon are in the lowered position, and the transport vehicle 3 is fixed through a plurality of struts 35. The workpiece W supported by (2) and supported by a plurality of welding jigs 3A formed by the carriage 3 in a non-joined state in which the carriage 3 and the vanilla bar 4 are separated from each other. Welding by the welding robot is performed.

In such a case, the motor 8 rotates in the conveyance drive mechanism for a predetermined period, and the conveyance bar 4 is moved in the direction opposite to the A direction by one pitch.

As a result, the plurality of engaged members 15 in the transfer bar 4 are connected to each engaging member 10 of the transport vehicle 3 supported by the fixing table 2, for example, in the welding work station S3. It was moved so as to face the engaging member 10 of the transport vehicle 3 supported by the welding work station S2.

In each of the welding work stations S1, S2 and S3, when the welding work of the parts to the workpiece W is completed, the welding work stations S1, S2 and S3 are placed in the welding work stations S1, S2 and S3, respectively. The operation of the pneumatic cylinder 7 is stopped in the elevating mechanisms installed on the elevated elevating rails 1A and lB, and when the rod 7a is in the reduced state, the cylinders on which the elevating rails lA and lB are arranged In each of the mechanisms 25, the flat members 27 and 28 rotate downward to extend the entire link mechanism 25 with the connecting member 26A or 26B as the support shaft, and As a result, the elevating rails 1A and 1B are moved upward, and the lifting rails 1A and 1B are moved upwards, and the lifting rails 1A and 1B are raised as shown in solid lines in FIGS.

In this case, the operation of the pneumatic cylinders 38 provided with each clamp member 36 is stopped, and is separated from the transport vehicle 3 as indicated by the solid line in FIG. 6, whereby the transport vehicle 3 is It moves upward along the rise of the lifting rails 1A and 1B, and is separated from the plurality of struts 35, and is supported by the lifting rails 1A and 1B.

Further, when the lifting rails lA and lB are in the lifted position, the engaging member 10 provided on the transport vehicle 3 engages and engages the engaged member 15 provided on the conveyance bar 4 facing it. The car 3 and the transfer bar 4 and the like are engaged with each other.

Then, the lift rails 1A and 1B are at the lifted position, and the motor 8 rotates forward for a predetermined period of time in the transport drive mechanism while the transport vehicle 3 and the transport bar 4 and the like are engaged with each other. 4) is moved in the A direction by one pitch along the carriage 3 coupled thereto.

Thereby, the carriage 3 which forms the many welding jig 3A which supports the workpiece | work W by which welding was carried out in each of welding work station S1, S2, and S3 is an example. For example, from the lifting rails 1A and lB attached to the welding work station S2 to the lifting rails 1A and 1B attached to the welding work station S3 preceding the welding work station S2. Is moved. As described above, the lifting operation of the lifting rails 1A and 1B attached to each of the welding work stations S1, S2, and S3, the reciprocating motion of the conveyance bar 4, and the like are repeatedly performed. 3 A of welding jigs which carry out and support the workpiece | work W are sequentially conveyed to welding work station S1, S2, and S3, and the workpiece supported by the many welding jig 3A ( W is welded in each of the welding work stations S1, S2, and S3.

As apparent from the above description, according to the conveying apparatus of the welding jig according to the present invention, the engaging member provided on the transport vehicle forming the welding jig and the engaged member provided on the conveying member are coupled to each other to rest along the lifting operation of the lifting rail portion. The state black is placed in the engaged state, and the conveyance of the transport vehicle is carried out by the conveying member in which the transport vehicle and the conveying member are moved from the first position to the second position under the engaging state through the engaging member and the engaged member. By employing an extremely simple configuration of each of the coupling member and the member to be coupled, it is possible to avoid an increase in the weight of the transport vehicle.

Furthermore, the selective engagement and release of the engaging member and the to-be-engaged member is performed along the lifting movement of the lifting rail, so that the time required for conveyance of the transport vehicle can be shortened.

Claims (1)

Carrier which is arrange | positioned on the elevating rails lA and lB provided along the welding work area | region, and its lifting rail, and forms the welding jig 3A which supports the workpiece to be welded in said welding work area | region ( 3) the coupling member 10 is installed, and the lifting rails (1A) and (1B) to take the ascending position to the carriage 3 is configured to be supported by the lifting rails (1A) and (1B) And a lifting mechanism for selectively taking a state in which the carriage 3 is supported by the fixing table 2 by descending the lifting rail from the rising position, a conveying member for reciprocating along the lifting rail, and a lifting member installed on the conveying member. When the lifting rail is placed in the ascending position by the sphere, the engagement with the coupling member is made, and when the lifting rail is lowered from the lifting position by the elevating mechanism, the coupling member 15 with which the engagement with the coupling member is canceled and , The coupling member is coupled Based on the coupling to the ash, the conveying member moves from the first position to the second position to carry the conveying vehicle, and the coupling member 10 is separated from the engaged member l5. The conveyance apparatus of the welding jig characterized by the conveyance drive mechanism which makes a conveyance member perform the operation | movement which returns to a 1st position from a 2nd position.