WO2011025147A2

WO2011025147A2 - Cart moving system in production line for various car models

Info

Publication number: WO2011025147A2
Application number: PCT/KR2010/004592
Authority: WO
Inventors: 허병하
Original assignee: 주식회사 우신시스템
Priority date: 2009-08-27
Filing date: 2010-07-15
Publication date: 2011-03-03
Also published as: KR100950684B1; WO2011025147A3

Abstract

The present invention relates to a system for moving a cart by using friction between a motor and a wheel to drive, stop and accelerate/decelerate the cart in a production line for cars of different models. The present invention is embodied in a new form of a cart moving system which has cart moving wheels/motors for moving a cart based on a direct contact-friction between the wheel and the bottom surface of the cart, wherein the cart moving wheels/motors are arranged intermittently on a cart travel path to move the cart to a main work area. Thus, the cart moving system of the invention can improve the drive efficiency associated with moving the cart, and among other things it enables the installation of a variety of car models in a relatively small space as well as the effective use of a layout area capable of easily adapting to different models or types of cars.

Description

Balance transfer device of multiple car production line

The present invention relates to a bogie conveying apparatus of a multi-vehicle production line, and more particularly, to an apparatus for conveying a bogie while traveling, stopping, accelerating and decelerating by friction of a motor wheel in a line producing various models or models.

In general, until the automobile manufacturer to produce the car is made by assembling a large number of parts in various mass production processes through various assembly and welding processes.

In order to assemble a vehicle assembly, for example, to assemble a side assembly of a vehicle body, a welding process of spot welding the inner and outer side panels to each other, and a hemming of bending the edges of the inner panel and the outer panel that are bonded to each other in this welding process (hemming) process and the like, each of these processes is carried out in conjunction with each other by a bogie moving along the transfer line with the panel loaded.

As such, in the automobile manufacturing process, in particular, the body assembly process is to assemble the body panels produced through the pressing process to produce a white body state body, and to install the floor, door, trunk lid, hood and fender on the body You will go through the process.

Recently, in the assembly process of the vehicle body, a multi-vehicle bogie conveying system is applied to flexibly cope with the change of vehicle type, which transfers the body panels and parts to the work process corresponding to the vehicle type through the bogie. We are trying to automate.

In accordance with the trend of factory automation, the multi-vehicle truck transfer system is also continuously researched and developed for its effective operation and management.

In the conventional vehicle conveying method in the multi-vehicle model production line, as shown in FIG. 7, a separate guide rail 110 is installed between the rail 100 and the rail 100 for the conveyance of the truck, and this guide rail is provided. The motor wheel 120 and the reverse pressure wheel 130 using the 110 is made in a manner of driving and stopping, acceleration and deceleration.

Here, reference numeral 140 denotes a transfer frame moving with the bogie.

However, the conventional trolley transfer system must provide a guide rail separately between the rails, and drive the entire transfer frame including the motor wheel and the back compression wheel as well as the trolley together, so that the overall structure is not only complicated, but also the installation. It takes disadvantages in terms of space utilization in layout design, such as occupying a lot of space, and in particular, since the friction method between the motor wheel and the back compression wheel is used, not only the driving efficiency is lowered, but also the overall power consumption is large and various models are available. There is a disadvantage in that it is not suitable for a multi-vehicle production line, such as there is a limit to the application.

In addition, as a balance conveying method in a conventional multi-vehicle production line, as shown in FIG. 8, a method of conveying a bogie along a rail using a linear motor is used.

The balance transfer method using the linear motor 150 transfers the balance while controlling the traveling, stopping and acceleration / deceleration in hertz (Hz) of the linear motor in a manner in which the linear motor and the balance are transferred in a non-contact manner.

However, the non-contact transfer method using such a linear motor is very difficult to control the driving, stopping and acceleration / deceleration of the vehicle, and even a skilled worker is not easy to work, and even a skilled worker needs know-how based on a long experience. This is very important, so maintenance is very difficult, and in particular, the weight of the bogie that rises above the linear motor for speed control must be constant for each model, and thus there is a problem in that it cannot actively cope with changes in the models of various models.

The present invention provides a balance transfer wheel / motor for transferring the balance by a direct contact friction method between the wheel and the lower surface of the balance, and installs the balance transfer wheel / motor in the middle of the balance progress path to move the balance to the main work area. Implementing a new type of trolley transfer system that can be used to improve the performance of the trolley can improve the driving efficiency related to the trolley transfer, and above all, it is possible to install various models in a relatively small space, It is an object of the present invention to provide a balance transfer device for a multi-vehicle production line that can effectively utilize layout space, such as being able to easily cope with a vehicle type.

The balance transfer device of the multi-vehicle production line provided by the present invention is installed in the middle of a traveling path of the balance along a rail connecting the work area and the plurality of stock areas to transfer the balance to the work area. The balance transfer wheel and the balance transfer motor for driving the balance transfer wheel and the balance transfer wheel and the balance transfer motor to selectively contact the balance transfer wheel with the lower surface of the balance And a down-down cylinder for lowering, etc., characterized in that the vehicle can be driven, stopped, and decelerated in a frictional connection method between the motor wheel and the lower surface of the truck.

Here, the rail for transporting the bogie consists of a straight main rail leading to the work area, and a plurality of sub rails connected in a 90 ° direction to the main rail side along both sides of the main rail, and between the rails. In the crossing section, it is preferable to install a rail drive unit for changing the moving direction of the bogie.

In addition, in the case of the trolley transfer motor and the trolley transfer wheel, it is preferable to apply an operating mechanism for selectively contacting the lower surface of the trolley while being raised and lowered in a rotating manner by a hinge structure.

Balance transfer device of the multi-vehicle production line provided by the present invention has the following advantages.

First, by adopting a method using a balance transfer wheel and a balance transfer wheel that can be used in a narrow space, it is possible not only to simplify the overall structure of the device, it is also possible to improve the driving efficiency during the balance transfer.

Second, it is possible to install several models or models in a relatively narrow space.

Third, it is easy to cope with different models or models by placing each stock area.

Fourth, it can be installed in a relatively narrow space, and it is advantageous in utilizing layout space, such as being able to actively respond to various models and models.

Fifth, the low work height eliminates the need for facility construction such as PIT.

Sixth, it is possible to design a layout in which a large number of stock areas are arranged on both sides of the main line leading to the main work area, thereby improving overall linkage and productivity of the production line, and thus an optimal production line suitable for various models and models. Can be built.

Seventh, because it is the transfer method by the direct friction contact method of wheels and trucks, even if you are not an experienced worker, you can operate it easily without any know-how. There is an advantage to deal with.

1 is a plan view showing the overall layout of the balance transfer apparatus according to an embodiment of the present invention

Figure 2 is a front view showing the overall layout of the balance transfer apparatus according to an embodiment of the present invention

Figure 3 is a plan view showing the arrangement position of the balance transfer wheel and the balance transfer motor in the balance transfer device according to an embodiment of the present invention

Figure 4 is a perspective view showing a balance transfer wheel and the balance transfer motor in the balance transfer apparatus according to an embodiment of the present invention

Figure 5 is a front view showing the operating state of the balance transfer wheel and the balance transfer motor in the balance transfer device according to an embodiment of the present invention

Figure 6 is a plan view showing a rail drive for changing the moving direction of the balance in the balance transfer apparatus according to an embodiment of the present invention

7 and 8 is a schematic diagram showing a conventional balance transfer method

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are a plan view and a front view showing the overall layout of the balance transfer apparatus according to an embodiment of the present invention, Figure 3 is a balance transfer wheel and balance transfer in the balance transfer apparatus according to an embodiment of the present invention It is a top view which shows the arrangement position of a motor.

As shown in Figures 1 to 3, the multi-vehicle production line to which the balance transfer device belongs is provided with a work area 10 to which a robot for performing various operations such as welding is provided on one side, the work at this time As a plurality of stock regions 11 for supplying or withdrawing panels of doors or leads are arranged around the region 10, the regions are formed in a combination form connected by the rails 12.

For example, the work area 10 is formed in one end section, and the linear main rail 12a extends long from the work area 10 at this time, and the main rail 12a is thus installed. While the plurality of stock regions 11 are disposed on both sides of the plurality of stock regions 11, the plurality of stock regions 11 have a predetermined distance along the rail length direction, and the plurality of stock regions 11 are approached in a 90 ° direction from the stock region 11 to the main rail 12b. The sub rail 12b is provided.

That is, a plurality of sub rails 12b branches in one 90 ° direction from one male rail 12a, and a stock region 11 is formed on each of the branched sub rails 12b.

One embodiment of the present invention provides a layout in which three stocks and a total of five stock regions are combined on both sides based on one working region.

Accordingly, the work area 10 and the stock area 11 can be interlocked between the areas by the rails 12, and the rails 12 can be transported by the trolleys 13 to transport components such as panels. Can be.

For example, the trolley | bogie 13 in the stock area 11 advances to the cross | intersection area | region with the main rail 12a side along the sub rail 12b, and after changing direction here, the main rail 12a Is transferred to the work area 10 along the.

After the work, the bogie 13 is transported in the reverse order above and returned to the stock area 11.

The transfer of the trolley 13 is made by a trolley wheel 14 and a trolley transfer motor 15 which are installed in the middle of the traveling path of the trolley 13 along the rail 12. The wheel 14 and the motor for transporting the trolley 15 are installed at appropriate positions along the traveling path of the trolley 13 as well as the work area 10 and each stock area 11 as shown in FIG. 3. do.

The trolley 13 is transported mounted on the rail 12 in a slidable structure. For example, the trolley 13 is transported in a form supported by a roller unit 21 installed between the lower side of the trolley and the rail side.

That is, the roller rail of the roller unit 21 is long installed on the upper surface of the rail 12, and the lower surface of the trolley 12 is mounted on the roller which is slide-bonded with this roller rail, and the trolley 13 is a roller. It can be transported while being guided by the unit 21.

In addition, the multi-vehicle production line is provided with a plurality of shock absorbers (23) for mitigating the impact at this time while maintaining the correct position when the trolley 13 is seated in the area, or located in the intersection area for changing the direction of travel. .

For example, the plurality of shock absorbers 23 in a state in which the trolleys face each other at an appropriate position in the middle of the traveling path of the trolley 13, such as the work area 10, each stock area 11, and an intersecting area that is an intersection between rails. ) Is installed.

Accordingly, the trolley 13 running along the rail 12 is precisely controlled by the elastic contact action of the shock absorber 23 from the time when it approaches the home position to the completion of the home position, and also the impact It can also be protected from vibration.

At this time, the shock absorber 23 may be applied to a spring, shock absorber and the like.

In addition, the multi-vehicle production line is provided with a variety of sensors associated with the transfer of the trolley 13, the transfer of the trolley 13 can be more accurately controlled.

For example, the trolley | bogie detection sensor 32 which detects the presence of the trolley | bogie 13, the driving direction sensor 33 which detects the travel direction of the trolley | bogie 13, etc. concentrates on the intersection area | region between rails as the vicinity. Is installed.

Figure 4 is a perspective view showing the balance transfer wheel and the balance transfer motor in the balance transfer apparatus according to an embodiment of the present invention.

As shown in FIG. 4, the trolley wheel 14 and the trolley motor 15 are parts for driving, stopping, and decelerating the trolley 13 in a frictional contact manner with the bottom surface of the trolley. It consists of a system for transferring the bogie.

To this end, the balance transfer motor 15 and the balance transfer wheel 14 are electrically coupled via a gearbox 34 for deceleration, and the like, on the motor plate 24 in this coupled state. On the other hand, a post 25 is erected on the base plate 35a, and the motor plate 24 which supports the trolley | bogie transfer motor 15 and the trolley | bogie wheel 14 on the post 25 at this time is carried out. Since the rear side of the motor is fastened and supported by the hinge pins 26, the entire motor plate 24 including the balance transfer motor 15 and the balance transfer wheel 14 rotates around the hinge pin 26. It becomes possible.

In addition, the up-down cylinder 16 supported by the rear pin structure is vertically installed on one side of the base plate 35a, and the arm 27 is connected between the cylinder rod and the rear side of the motor plate 24 at this time. Therefore, when the up-down cylinder is operated, the entire motor plate 24 including the balance transfer motor 15 and the balance transfer wheel 14 moves up and down in a rotational manner, and eventually the balance transfer wheel 14 moves up the balance. It may come into contact with the bottom surface and fall from the bottom surface of the bogie when down.

Here, it is preferable to attach and use a pad 28 made of a material such as rubber to the surface of the trolley wheel 14 as a means for enhancing the contact friction characteristics with the lower surface of the trolley.

Figure 5 is a front view showing the operating state of the balance transfer wheel and the balance transfer motor in the balance transfer apparatus according to an embodiment of the present invention.

As shown in FIG. 5, in order to transfer the balance between the regions, first, the up-down cylinder 16 must be operated to bring the wheel transfer wheel 14 into contact with the lower surface of the balance 13, and the balance 13 is transferred. When the trolley | bogie 13 is moving and the trolley | bogie 13 changes a direction of progress, the trolley | bogie wheel 14 must be separated from the trolley | bogie 13.

In order to convey the trolley | bogie 13 which stopped at the predetermined area | region, when the up-down cylinder 18 moves backward, the trolley | bogie wheel 14 will come into contact with the lower surface of the trolley | bogie 13 by a rotation action, and then When the trolley wheel 14 rotates by the operation of the trolley transfer motor 15, the trolley 13 moves in one direction by the frictional contact force at this time, and the trolley stopper 22 moves at a predetermined position. When the trolley 13 is in place, the trolley transfer motor 13 stops operation, and the trolley wheel 14 moves away from the bottom surface of the trolley 13 by the forward operation of the up-down cylinder 16.

On the other hand, referring to the balance stopper 22 with reference to Figure 5, the balance stopper 22 is the balance 13 when the balance 13 enters into the area, or proceeds to a position in the intersection area to change the direction of travel ) To precisely position the position.

To this end, the bogie stopper 22 is located at the rear or side of the position where the bogie wheel 14 and the bogie motor 15 are installed, while the work area 10, the stock area 11, and the rails. It is provided in such a manner that an appropriate number is arranged on each region such as an intersecting region of the liver.

The trolley stopper 22 is a stopper cylinder 29 horizontally installed at one side of the base plate 35b, a stopper arm 31 coupled to the rear end hinge structure to substantially rotate the trolley 13, and the stopper. The rod of the cylinder 29 and the stopper arm 31 is connected in the middle of the length of the folding and unfolding operation and consists of a form including a pair of stopper links 30 for transmitting the cylinder operating force to the arm side.

Accordingly, the stopper arm 31 is in a horizontal position toward the direction in which the trolley 13 proceeds while the stopper cylinder 29 is advanced and the stopper link 30 is opened, and the trolley 13 is in this state. After the trolley 13 is in the correct position, the stopper arm 31 is bent downwards in the reverse state of the stopper cylinder 29 and in the folded state of the stopper link 30, It is separated from the (13) side.

Figure 6 is a plan view showing a rail driving unit for changing the moving direction of the balance in the balance transfer apparatus according to an embodiment of the present invention.

As shown in FIG. 6, the rail drive unit 17 is a means for changing the traveling direction of the trolley 13 provided at the crossing section between the rails.

The crossing section between the main rail 12a and the sub rail 12b of the rail 12 is a rotating rail 19 that connects the sub rail 12b once and the main rail 12a while rotating 90 °. At this time, the rotatable rail 19 is supported by the rotatable base 20 to be rotated together when the rotatable base 20 rotates.

And, one side of the rail crossing section, that is, one side of the rotary rail 19 and the rotary base 20 is provided with a forward and backward cylinder 18, the rod of the forward and backward cylinder 18 is a rotary base 20 Is connected to one side.

Accordingly, when the forward and backward cylinder 18 is operated, the rotary rail 19 rotates 90 ° to connect the sub rail 12b in a continuous line form, or the main rail 12a in a continuous line form. .

For example, when the rotatable rail 19 connects the sub rails 12b as shown in the upper view of FIG. 5, the bogie 13 moves on the sub rails 12b from the stock area 11 to the intersection area. When the rotary rail 19 is rotated by 90 ° to connect the main rail 12a as shown in the lower figure, the trolley 13 moves along the main rail 12a while the traveling direction is changed. 10 may be transferred.

Therefore, looking at the overall flow of the balance transfer device is configured as follows.

One work area 10 and five stock areas 11 constitute one production line via the rail 12, and each stock area 11 has a predetermined work object, for example, an RH front door. The trolley | bogie 13 which mounts work objects, such as LH front door, RH rear door, LH rear door, trunk lid, is arrange | positioned, respectively.

With the operation of the production line, the trolleys 13 in each stock area 11 are transferred to the work area 10 sequentially while being linkedly controlled by a predetermined automation program, and again after the work is completed. It will return to the area of.

For example, when carrying out work on the RH front door in the stock area 11 located at the top left first in FIG. 1, the bogie 13 is driven by the contact friction of the wheel 14 for transporting the bogie. It is conveyed along 12b and entered into the intersection area with the main rail 12a, and is then positioned by operation of the bogie stopper 22.

The conveyance of the trolley | bogie 13 at this time is in charge of the trolley | bogie wheel 14 in the stock area 11 and the trolley | bogie wheel 14 in the boundary part between the stock area 11 and an intersection area | region.

Subsequently, in the state where the rotatable rail 19 is continued toward the main rail 12a by the operation of the rail drive unit 17, the trolley 13 is closed by the contact friction of the wheel 14 for transporting the trolley as in the above. It is conveyed along 12a and sent to the work area 10, where work such as welding and hemming is performed.

Subsequently, the trolley equipped with the finished RH front door proceeds in the order of work area → main rail → intersection area → 90 ° traveling direction → sub rail → stock area. This process is completed, and these processes are linked between each stock area and work area, and the balance transfer and work for various models or models can be performed by an automated process.

Claims

It is installed in the middle of the traveling path of the trolley 13 while following the rail 12 connecting the working region 10 and the plurality of stock regions 11 to transfer the trolley 13 to the working region 10. And a balance transfer wheel 14 for contacting and rubbing the lower surface of the balance 13, a balance transfer motor 15 for driving the balance transfer wheel 14, and the balance transfer wheel 14. A transfer unit 40 including an up-down cylinder 16 which raises and lowers the balance transfer wheel 14 and the balance transfer motor 15 so as to selectively contact the lower surface of the 13;

The base plate 35b is installed at one side of the transfer unit 40 installed at the working area 10 and the plurality of stock areas 11 and the intersection area where the two areas intersect, to hold the position of the trolley 13. A stopper cylinder (29) horizontally installed on the stopper), a stopper arm (31) coupled to the rear end hinge structure and substantially rotatable to the trolley (13), and a rod and stopper arm (31) of the stopper cylinder (29). And a trolley stopper 22 including a pair of stopper links 30 which transmits the cylinder actuation force to the stopper arm 31 side while being connected to and folded and installed. Balance feeder.
The method according to claim 1, wherein the rail 12 is approached in a 90 ° direction to the main rail 12a side along both sides of the straight main rail 12a leading to the work area 10 and the main rail 12a. Comprising a plurality of sub-rails (12b) connected to each other, the cross section between the rail conveying device of the multi-vehicle production line, characterized in that the rail drive unit (17) for changing the moving direction of the balance is provided.
3. The rail driving unit 17 of claim 2, wherein the rail driving unit 17 is operated by the forward and backward cylinders 18 installed on one side of the rail crossing section and the forward and backward cylinders 18 to selectively connect the rails while rotating 90 °. Balanced conveying device of a multi-vehicle production line, characterized in that it comprises a rotary rail 19 and a rotary base 20 connected to the forward and backward cylinder 18 while supporting the rotary rail 19 .
2. The multi-vehicle model production according to claim 1, wherein the trolley wheel 14 including the trolley motor 15 is selectively contacted with the lower surface of the trolley while being raised and lowered by a hinge structure. Balance feeder on line.
The balance transfer apparatus of claim 1, wherein the balance is guided by the roller unit 21 installed between the bottom side of the bogie and the rail side.
According to claim 1, The plurality of shock absorbers that are installed in the middle of the working area 10, the plurality of stock areas 11, and the traveling path of the trolley 13 to absorb the shock when the position of the trolley 13 stops ( Balance conveying apparatus of a multi-vehicle production line, characterized in that it further comprises 23).