JP4552625B2 - Vehicle assembly system and vehicle assembly equipment used in the vehicle assembly system - Google Patents

Description

  The present invention relates to a vehicle assembly system used for the production of various vehicles such as agricultural work vehicles (combine, tractor, etc.), civil engineering work vehicles (bulldozer, backhoe, etc.) and passenger cars. The present invention also relates to a vehicle assembly facility used in this vehicle assembly system.

A conventional vehicle assembly system in a factory will be described.
First, at the assembly start position, a basic structural member (such as a chassis frame) of the vehicle is supported on the carriage. Then, the carriage is engaged with an endless conveyor installed below the floor, and the carriage is pulled and moved along the assembly line by driving the endless conveyor. In this assembly line, workplaces and workers who perform specific assigned assembly work (for example, assembly of sheets and mounting of electrical parts) are sequentially arranged at appropriate intervals. When moving, each assembly operation is performed on the vehicle on the carriage. (For example, refer to Patent Document 1).

And the above-mentioned trolley | bogie used in this conventional vehicle assembly system has each used the exclusive thing according to the form of the vehicle to assemble.
That is, for assembling work of a vehicle equipped with a four-wheel traveling device such as a tractor, for example, a carriage equipped with a body-side support portion that supports the vehicle in a state where the four wheels are floated is necessary. On the other hand, for the assembly work of a vehicle equipped with an endless track type traveling device such as a combine, for example, left and right traveling device side support portions that support the vehicle with the left and right endless track type traveling devices mounted thereon are provided. Need a trolley.

Conventionally, in order to assemble vehicles having different configurations in the same factory, an assembly line dedicated to a vehicle equipped with a four-wheel traveling device and a vehicle dedicated equipped with an endless track type traveling device are used. Two types of assembly lines were co-existing with this assembly line.
Japanese Patent Laid-Open No. 7-41156

  As described above, in the prior art, in order to assemble vehicles having different forms in the same factory, an assembly line dedicated to a vehicle including a four-wheeled traveling device and an endless track type traveling device are provided. There were two types of assembly lines, one dedicated to vehicle assembly lines. Therefore, there is a problem that a large amount of cost is required for the installation and operation of these two types of assembly lines.

  For example, in the case of production of agricultural work vehicles, the production volume per day in the same factory varies greatly from month to month. In the case of a tractor, it starts to increase greatly from around December and then increases around February in the following year. -There is a tendency to reach a peak, and the number of units produced at this peak may reach about five times the number before it starts to increase. In the case of a combine, it shows a high level from April to July and then tends to decrease. The number of units produced at this high level is about twice the number after the decrease. .

  For this reason, workers are frequently moved between two types of assembly lines: a vehicle-specific assembly line equipped with a four-wheel traveling device and a vehicle-specific assembly line equipped with an endless track type traveling device. Therefore, it is necessary to cope with fluctuations in production volume.

  Also, if it is necessary to reduce the total number of units produced due to production adjustment, the number of workers has to be reduced, resulting in an increase in the number of processes handled by each worker, and these workers have more products. It becomes difficult to master assembly work because it requires knowledge. As a result, the assembly system has a problem in dealing with when a new model is launched, when workers are changed, and when the number of workers is increased or decreased.

The present invention takes the following technical means in order to solve the above-described problems.
That is, in the first aspect of the present invention, provided with a carriage which is detachable support member to the upper surface of the left and right endless track mounting plate provided with a endless track mounting plate of the left and right freely lateral spacing changes , only setting a moving means for moving the該台car working process of the assembly line, the dolly in fully assembled position or its vicinity of the vehicle in the assembly line provided lifter to lower the floor, truck support of the lifter The left and right inner space between the left and right endless track belt mounting plates and the left and right inner track belt mounting plates and the left and right inner track belt mounting plates are separated from each other. When assembling a vehicle equipped with a wheel-type travel device that is divided into left and right outer second divided floor portions on which the cart in the expanded state is placed, the left and right endless track bands of the cart are mounted. The left and right spacing of the mounting plate is reduced and the left and right A support member attached to the upper surface of the track belt mounting plate, to support the vehicle bogie in a state of being floated traveling device of a wheel-type by placing the chassis frame of the vehicle to the upper end of the support member, said carriage In the state where the vehicle supported by the carriage is moved while moving along the moving means, and the assembly of the vehicle in the assembly line is substantially completed and the movement of the carriage is stopped on the lifter, the second division of the lifter the wheel type traveling device for a vehicle supported at the upper end of the front Ki支 lifting member by first dividing floor locks so as not to lower the floor only is lowered to lower the carriage from the floor second is grounded to the upper surface of the divided floor is separated vehicle from bogie, at the time of vehicle assembly operations having a traveling device of the endless track type, removing the supporting member from the upper surface of the left and right endless track mounting plate of the carriage Both the left and right endless track belt mounting plates are widened, and the left and right endless track belt mounting plates are placed on the upper surface of the left and right endless track belt mounting plates to support the vehicle on the cart. Assembling the vehicle supported by the carriage while moving along the moving means, and in the state where the assembly of the vehicle in the assembly line is substantially completed and the movement of the carriage is stopped on the lifter, the second divided floor portion of the lifter After releasing the lock and lowering the carriage so that the upper surfaces of the left and right endless track belt mounting plates are substantially level with the floor surface by lowering the second divided floor portion together with the first divided floor portion. by driving the vehicle is set to the vehicle assembly system comprising the Turkey is disengaged the vehicle from the truck.

According to the first aspect of the invention, when assembling the vehicle provided with a traveling device of the car wheeled narrows the lateral distance between the left and right endless track mounting plate in carriage, mounting the endless track of the right and left plate A support member is attached to the upper surface of the vehicle, and a chassis frame of the vehicle to be assembled is placed on the upper end portion of the support member, so that the vehicle is supported by the carriage while the traveling device is levitated. On the other hand, when assembling the vehicle provided with a traveling apparatus infinite track belt type, remove the support member from the upper surface of the left and right endless track mounting plate, lateral spacing of the left right endless track mounting plate of this by expanding and thereby support the vehicle bogie by the placing the endless track of the right and left of the vehicle to be putting together the upper surface of the endless track mounting plate of the left and right.

Then, while moving along these carriage to the working process of the assembly line by the moving means, for the supported foundation part of the vehicle bogie, shared by each work process by a worker positioned on the individual work processes The assembled operations are sequentially performed.

In the state where the assembly work is almost completed and the movement of the carriage is stopped on the lifter, in the case of a vehicle equipped with a wheel-type traveling device, the second divided floor portions on the left and right outer sides of the lifter are lowered. by lowering the carriage from the floor surface locked lowers the only first division floor of the right and left inward prevent the top surface of the second split floor traveling unit of the vehicle is supported at the upper end supporting region member by ground to separate the vehicle from the truck in. On the other hand, in the case of a vehicle equipped with a driving device of an infinite band expression, by lowering together with the first dividing floor the second division floor to unlock the second divided floor of the lifter, the left and right endless The vehicle is moved after the carriage is lowered so that the upper surface of the track belt placing plate is substantially the same height as the floor surface, and the vehicle is detached from the carriage. In addition, what is necessary is just to return the trolley | bogie after use to the work start position of an assembly line with an automatic guided vehicle.

In this way, it is possible to mix continuously produced by the same assembly line the vehicles equipped with the traveling device of the vehicle and an endless track type comprising a driving device for car wheels type.
According to a second aspect of the present invention, the first divided floor portion of the lifter is assembled in a state where the assembly of the vehicle including the wheel-type traveling device in the assembly line is substantially completed and the movement of the carriage is stopped on the lifter. when only lowers the first division floor has reached the lowest position, the left and right left and right fall preventing plate which has been accommodated in the second divided floor which is locked so as not lowering of the vehicle The vehicle assembly system according to claim 1, wherein the vehicle is prevented from being derailed by being protruded inside the wheels .

According to the second aspect of the present invention, in the vehicle assembly system according to the first aspect, the assembly of the vehicle having the wheel type traveling device in the assembly line is substantially completed, and the movement of the carriage is stopped on the lifter. In the state, when only the first divided floor portion of the lifter is lowered and the first divided floor portion reaches the lowest lowered position, the lifter is stored in the second divided floor portion that is locked so that it cannot be lowered. The left and right dropout prevention plates that protrude from the left and right wheels of the vehicle protrude to the inside of the left and right wheels of the vehicle, thereby preventing the vehicle from falling off.

In a third aspect of the present invention, a lifter for lowering the carriage supporting the vehicle from the floor surface is provided, and the support surface for supporting the carriage of the lifter is in a state where the left and right intervals between the left and right endless track belt mounting plates are narrowed A first divided floor portion on both the left and right inner sides on which the carriage is placed, and a second divided floor portion on the left and right outer sides on which the carriage is placed in a state where the left and right space between the left and right endless track belt placing plates is widened. A first limit switch for detecting a cart in a state in which the left-right distance between the left and right endless track belt mounting plates is reduced is provided on the first divided floor portion, and the second divided floor portion is provided with the first limit switch. Is provided with a second limit switch for detecting a cart in a state where the left and right endless track belt mounting plates are widened, and when the first limit switch is turned on, the vehicle supported by the cart is a wheel. Is determined to be a vehicle equipped with a traveling device of the type and descends the second divided floor When the second limit switch is turned on, the vehicle supported by the carriage is provided with an endless track type traveling device. 2. A control device for determining that the vehicle is a vehicle, unlocking the second divided floor portion, and automatically lowering the second divided floor portion together with the first divided floor portion is provided. This is a vehicle assembly facility used in the vehicle assembly system.

According to a third aspect of the present invention, in the vehicle assembly system according to the first aspect, when the assembly of the vehicle in the assembly line is substantially completed and the movement of the carriage is stopped on the lifter, the vehicle is stopped on the lifter. When the first limit switch provided on the first divided floor is turned on by the dolly, the vehicle carried in and supported by this dolly is determined to be a vehicle equipped with a wheel-type travel device, The two-divided floor portion is locked so that it cannot be lowered, and only the first divided floor portion is automatically lowered, and the vehicle traveling device supported by the upper end portion of the support member is grounded on the upper surface of the second divided floor portion, Separate the vehicle from

Further, when the second limit switch provided on the second divided floor is turned on by the carriage stopped on the lifter, the vehicle carried in supported by the carriage has an endless track type traveling device. The second divided floor portion is unlocked, the second divided floor portion is automatically lowered together with the first divided floor portion, and the upper surfaces of the left and right endless track mounting plates are the floors. After the carriage is lowered so as to be approximately the same height as the surface, the vehicle is caused to travel and the vehicle is detached from the carriage.

In the first aspect of the present invention, since it is possible to mix continuously produced by the same assembly line the vehicles equipped with the traveling device of the vehicle and an endless track type comprising a driving device for car wheels formula , as compared to those coexist two kinds of assembly line and the vehicle-only assembly line having a conventional driving apparatus for a vehicle dedicated assembly line and endless track type comprising a driving device for car wheels formula as Costs required for operation, such as assembly line installation costs and power costs, can be reduced.

  In addition, the assembly time per worker can be shortened and the worker can easily become familiar with the assembly work, so the number of workers can be reduced and labor costs can be reduced. It is possible to make it difficult for problems to occur when responding to a change in the number of workers and when the number of workers increases or decreases.

In the invention according to claim 2, in addition to the effects of the invention according to claim 1, the assembly of the vehicle equipped with the wheel type traveling device is substantially completed, and the vehicle is removed from the carriage stopped on the lifter. When separating, it is possible to prevent the vehicle from falling off.

In the invention of claim 3, by using this vehicle assembly equipment, a vehicle equipped with a wheel type traveling device and a vehicle equipped with an endless track type traveling device are continuously mixed by the same assembly line. Since it is possible to produce, there are two types of assembly lines: a vehicle-specific assembly line equipped with a wheel-type traveling device and a vehicle-specific assembly line equipped with an endless track type traveling device as in the prior art. Compared to those that coexist, it is possible to reduce costs required for operation such as assembly line installation costs and power costs.

  In addition, the assembly time per worker can be shortened and the worker can easily become familiar with the assembly work, so the number of workers can be reduced and labor costs can be reduced. It is possible to make it difficult for problems to occur when responding to a change in the number of workers and when the number of workers increases or decreases.

  The present invention relates to a vehicle assembly system capable of continuously mixing and producing different types of vehicles on the same assembly line, such as a vehicle equipped with a four-wheel traveling device and a vehicle equipped with an endless track type traveling device. The vehicle assembly equipment used in this vehicle assembly system was realized.

(Configuration of vehicle assembly cart, vehicle assembly facility, and vehicle assembly system using these)
FIG. 1 is a plan view for explaining an assembly line for mixed production of a tractor, which is a vehicle equipped with a four-wheel traveling device, and a combine, which is a vehicle equipped with an endless track traveling device.

  In FIG. 1, A1 is the combine mission / crawler (endless track belt) assembly workplace, A2 is the main harness wiring work position of the main line 5 process, and A3 is the combine 9 main line process. The threshing docking work position, A4 is the combine harvesting docking work position as the main line 11 process, and E is the final inspection / lifter device position as the main line 14 process. Further, B1 is a tractor mission / shaking side workplace, B2 is a tractor engine docking work position which is the main line 2 process, B3 is an intermediate inspection position which is the main line 8 process, and E is the final inspection / lifter described above. -Device position. The movement of the carriage P from A1 to A2 and the movement of the carriage P from B1 to B2 are performed manually by the operator, but the movement of the carriage P from A2 to E and the movement of the carriage P from B2 to E are performed. Is automatically performed by towing by an endless conveyor (moving means) 24 described later. Note that T is a material storage place for parts and tools necessary for various assembling operations.

2-6 is explanatory drawing of the above-mentioned cart P utilized in this assembly system.
That is, the carriage P has left and right crawler mounting plates 2L and 2R, which are left and right traveling device side support portions, on the upper side of the left lower frame 1L and the upper side of the right lower frame 1R, respectively. Attach, and support shafts 3, 3, 3, and 3 that are pivotable on the vertical axis on the front and rear lower surfaces of the left crawler mounting plate 2L and the front and rear lower surfaces of the right crawler mounting plate 2R, respectively. The casters-4, 4, 4 and 4 are rotatably mounted, and the left and right lower frames 1L and 1R are pivotally connected by front and rear expansion / contraction links 5F and 5R. The front and rear expansion / contraction links 5F and 5R are arranged on the left lower frame 1L side by front and rear left and right link arms 7L and 7L and the right lower frame 1R side. The inner ends of the front and rear right link arms 7R and 7R that are axially attached by the longitudinal axes 6R and 6R are axially attached by the longitudinal axes 8 and 8, respectively. Further, connecting bosses 9, 9, 9, and 9 having vertical holes are attached to the front and rear outer portions of the support stems 3, 3, 3, and 3, respectively.

  When the combine is supported on the carriage P configured as described above, as shown in FIGS. 2 and 3, the combiner is separately prepared in a state where the distance between the left and right crawler mounting plates 2L and 2R is expanded in parallel. The left and right fixing pins 11, 11, 11, 11 of the fixtures (large) 10, 10 are inserted into the connecting bosses 9, 9, 9, 9 on the carriage P side, whereby the left and right crawler mounting plates 2L, Fix in the state where the interval of 2R is widened. Thus, the combine can be supported in a state where the left and right crawler mounting plates 2L, 2R of the carriage P are mounted on the left and right crawlers of the combine. And the engagement pins 13 and 13 were inserted in the engagement holes 12 and 12 provided in the center part of the said fixture (large) 10 and 10, and this engagement pin 13 and 13 was provided under the floor surface mentioned later. The endless conveyor is engaged, and the carriage P is pulled and moved by driving the endless conveyor 24.

  On the other hand, as shown in FIGS. 4 and 5, when the tractor is supported on the carriage P, the fixtures 10 and 10 are removed and the left and right crawler mounting plates 2L and 2R are joined. With the interval narrowed, the left and right fixing pins 15, 15, 15, 15 of the separately prepared fixtures (small) 14, 14 are inserted into the connecting bosses 9, 9, 9, 9 on the carriage P side, thereby It fixes in the state which narrowed the space | interval of the left and right crawler mounting plates 2L and 2R. Thus, the tractor is supported by the supporting member (airframe side support portion) 16 separately attached to the cart P without interfering the four tires of the tractor supported by the cart P with the crawler mounting plates 2L and 2R. Can be supported. And the engagement pins 13 and 13 were inserted in the engagement holes 17 and 17 provided in the center part of the said fixing tool (small) 14 and 14, and this engagement pin 13 and 13 was provided under the floor surface mentioned later. The endless conveyor 24 is engaged, and the carriage P is pulled and moved by driving the endless conveyor 24.

Further, a lifter UD as shown in FIGS. 7 and 8 is provided at a position E (final inspection / lifter device position) in FIG. The support surface of the lifter-UD is a long box-shaped split floor portion on the left and right outer sides (second) on which the casters 4, 4, 4, and 4 on the front, rear, left, and right of the carriage P in a state of supporting the combine can be placed and supported . (Divided floor portion) 18L, 18R and the left and right inner side long box-shaped divided floor portions (first and second) on which the casters 4, 4, 4, 4 and 4 on the front, rear, left and right of the carriage P in a state of supporting the tractor can be placed and supported . (1 divided floor portion) 19L, 19R, and a lifting device 20 including a hydraulic lifting drive device and a parallel link mechanism for lifting and lowering these divided floor portions 18L, 18R, 19L, 19R.

  As shown in FIG. 7, the lifter UD shortens the lock air cylinders 21 and 21 and rotates the lock arms 22 and 22 to the unlocked position, thereby using the lock arms 22 and 22. It is configured so that the locked state of the divided floor portions 18L and 18R on the left and right outer sides can be released. As a result, the left and right outer divided floor portions 18L and 18R can be raised and lowered by the lifting device 20 together with the left and right inner divided floor portions 19L and 19R. In addition, this state is utilized when raising / lowering the cart P of the state which supported the combine as shown in FIG.

  Further, as shown in FIG. 8, the lifter UD extends the locking air cylinders 21 and 21, and the upper ends of the left and right outer divided floor portions 18L and 18R by the free ends of the lock arms 22 and 22, respectively. The lower surface of the wall is supported, and the divided floor portions 18L and 18R on the left and right outer sides can be locked so that they cannot be raised and lowered. Thus, only the left and right inner divided floor portions 19L and 19R can be lifted and lowered by the lifting device 20 while the left and right outer divided floor portions 18L and 18R are held at the same height as the main floor 23. . In addition, this state is utilized when raising / lowering the cart P of the state which supported the tractor, as shown in FIG.

Further, as shown in FIGS. 9 and 10, a slot 25 is formed in the main floor 23 along the assembly process, and an endless conveyor 24 that pulls and moves the carriage P is provided below the slot 25. Arrange along. A large number of engaged bosses 26 and 26 are attached to the endless conveyor 24 at a pitch in accordance with the front and rear engaging pins 13 and 13 on the carriage P side, and the engaged bosses 26 and 26 are attached to the carriage P side. The carriage P is pulled and moved by fitting the front and rear engagement pins 13 and 13 together. Then, an A limit switch 27 is provided above the end of the endless conveyor 24, a B limit switch 28 is provided below the end of the endless conveyor 24, and the divided floor portion 19L on the left and right sides of the lifter-UD C limit switch (first limit switch) 29 is provided in 19R, D limit switch (second limit switch) 30 is provided in the divided floor portion 18L or 18R on the left and right sides of the lifter-UD, and the carriage is endless. A carriage carry-in cylinder 31 that takes over from the conveyor 24 to the divided floor side is provided.

  Thus, when the carriage P pulled by the endless conveyor 24 reaches the end portion of the endless conveyor 24, the engagement pin 13 on the carriage P side and the engaged boss 26 on the endless conveyor 24 side are engaged. It is unraveled and carried onto the lifter-UD. At this time, the A limit switch 27 detects the engaged boss 26 after the engagement with the engaging pin 13 is released, so that the presence of the carriage P is confirmed. When the B limit switch 28 detects the engaged boss 26, the carriage carry-in cylinder 31 is operated so that the carriage P is carried onto the lifter UD. (That is, if both the A limit switch 27 and the B limit switch 28 do not detect the carriage P, the carriage carrying cylinder 31 does not operate.) And, the carriage P loaded on the lifter UD has the width of the carriage P wide. If the tractor is set for a narrow tractor, the C limit switch 29 is turned on so that the vehicle that has been carried in is determined to be a tractor. On the other hand, when the cart P is set for a wide combine, the D limit switch 30 is turned on, and the vehicle is linked so that it is determined that the carried-in vehicle is a combine. Then, based on the determination result, after the sensor attached to the carriage carry-in cylinder 31 detects that the carriage carry-in cylinder 31 is in the shortest state, the lifter UD is lowered. Connect.

  When the D limit switch 30 is turned ON and the vehicle that has reached the final inspection / lifter device position E is determined to be a combine, the lock air cylinder 21 is shortened and the lock arm is operated. The free end portions 22 are connected so as to retreat outward from the lower surface of the upper wall of the divided floor portions 18L and 18R on the left and right outer sides. As a result, the left and right outer divided floor portions 18L and 18R, the carriage P and combine placed on the upper surfaces of the left and right outer divided floor portions 18L and 18R, and the left and right inner divided floor portions 19L and 19R are lifted. -Connect to descend by UD. This lowered position is detected by a positioning sensor (not shown), and when the upper surfaces of the left and right crawler mounting plates 2L and 2R of the carriage P coincide with or substantially coincide with the upper surface of the main floor 23, the lowering operation is stopped. Connect as you do. Then, after the upper surface of the left and right crawler mounting plates 2L, 2R of the carriage P coincides or substantially coincides with the upper surface of the main floor 23 and the lifter UD descending operation is stopped, the combine travels forward. By doing so, the combine is detached from the carriage P.

  On the other hand, when it is determined that the vehicle that has reached the final inspection / lifter device position E by turning on the C limit switch 29 is a tractor, the locking air cylinder 21 is extended and locked. The free end side of the space 22 enters the lower surface of the upper wall of the divided floor portions 18L and 18R on the left and right outer sides, and is connected so as to support the lower surface of the upper wall. As a result, the vertical movement of the left and right outer divided floor portions 18L and 18R is locked, and the left and right outer divided floor portions 18L and 18R cannot be lowered. As a result, the left and right inner divided floor portions 19L and 19R and the carriage P and the tractor placed on the upper surfaces of the left and right inner divided floor portions 19L and 19R are lowered by the lifter UD. When the four tires of the tractor come in contact with the upper surfaces of the divided floor portions 18L and 18R on the left and right outer sides, and further when the carriage P descends, the tractor is separated from the support member 16 attached to the carriage P. When the lifter UD reaches the lowest position, the left and right drop prevention plates 32L and 32R housed inside the left and right divided floor portions 18L and 18 are moved to the left and right drop prevention cylinders ( The air-cylinder-) 33L and 33R are linked so as to protrude upward inward. The left and right drop prevention plates 32L and 32R project inside the tire of the tractor, thereby preventing the tractor from being removed.

  Then, the carriage after the combiner or tractor is detached is towed and transported in the factory by an unmanned transport vehicle, and then the combine mission assembly assembly A1 of the combine that is the original work position or the tractor mission chassis. It is configured to return to the docking workplace B1.

The driving state of the endless conveyor 24, the operating state of the lifter UD lifting device 20, the operating state of the locking air cylinder-21, the A limit switch 27, the B limit switch 28, the C limit switch 29, The detection result of the D limit switch 30 and the operation state of the carriage carry-in cylinder 31 and the left and right drop-off prevention cylinders 33L and 33R are configured to be controlled by a control device. 11 is provided. The control panel 34 includes a power monitor lamp 34a, an air pressure abnormality display lamp 34b, a cylinder abnormality lamp 34c, a reserve lamp 34d, an operation start switch 34e, an operation stop switch 34f, and an operation emergency stop switch 34g. An automatic-manual changeover switch 34h, a reset switch 34i, a lowering-upward changeover switch 34j, a reverse-forward changeover switch 34k, a drop-out prevention plate loading / unloading switch 34l, and a thermal abnormality display lamp 34m. Is provided.
(Operation of vehicle assembly system, vehicle assembly equipment, vehicle assembly cart)
First, the assembly work of the combine will be described.

  In the combine CB mission crawler assembly workplace A1 in FIG. 1, the worker assembles the engine E and the traveling mission case 36 to the framed machine frame 35, and the traveling The left and right crawlers 37, 37 are wound around the left and right wheel groups driven by the mission case 36. The base body of the combine CB subjected to such work is supported by the carriage P as shown in FIG. 12, but at this time, the interval between the left and right crawler mounting plates 2L and 2R in the carriage P is widened in advance. The combine CB base is supported on the carriage P so that the left and right crawler mounting plates 2L and 2R are mounted on the upper surfaces of the left and right crawler mounting plates 2L and 2R with the increased spacing. Then, the carriage P and the combine CB base are manually conveyed to the assembly line, the engaged bosses 26 and 26 on the carriage P side and the endless conveyor 24 side are engaged by the engagement pins 13 and 13, and the endless conveyor The carriage P is pulled by 24 and slowly moved along the assembly process.

  Then, when the carriage P supporting the combine CB base reaches the main harness routing work position A2 of the combine CB in FIG. 1, as shown in FIG. 13, the operator makes the front panel 38 and the steering lever 39. Assembly of the parts around the operation seat such as the main harness and wiring.

  When the carriage P supporting the combine CB base reaches the threshing docking position A3 of the combine in FIG. 1, as shown in FIG. 14, the operator lifts the threshing device 40 with a hoist in the factory and combines the CB base. Are mounted and fixed on the machine base frame 35, and a work for connecting a transmission system and an operation system to the threshing apparatus 40 is performed. Reference numeral 41 denotes a tractor-TR substrate which is mixed and produced after the combine CB substrate.

  When the carriage P on which the combine CB base is mounted reaches the combine cutting docking position A4 in FIG. 1, as shown in FIG. 15, the operator performs the operation of assembling the cutting device 42 on the combine CB base. . Thereby, the assembly of the combine CB is completed.

The combine CB, which has been assembled in this way, is pulled in the state of FIG. 16 to the position before the final inspection / lifter device position E in FIG.
When the carriage P reaches the end of the endless conveyor 24, the engagement between the engagement pin 13 on the carriage P side and the engaged boss 26 on the endless conveyor 24 side is released, and the carriage P is carried onto the lifter UD. The At this time, the presence of the carriage P is confirmed by detecting the engaged boss 26 after the A limit switch 27 is released from the engagement with the engagement pin 13. Then, when the B limit switch 28 detects the engaged boss 26, the carriage carry-in cylinder 31 is operated, and the carriage P is carried onto the lifter UD, and the state shown in FIG. 17 is obtained.

  When it is determined that the vehicle having reached the final inspection / lifter device position E by turning on the D limit switch 30 is a combine, the lock air cylinder 21 is shortened and the lock arm 22 is moved. The free end portion is retracted outward from the lower surface of the upper wall of the divided floor portions 18L and 18R on the left and right outer sides. Accordingly, as shown in FIG. 18, the left and right outer divided floor portions 18L and 18R, the carriage P and the combine CB placed on the upper surfaces of the left and right outer divided floor portions 18L and 18R, The divided floor portions 19L and 19R are integrally lowered by the lifter UD. This lowered position is detected by a positioning sensor (not shown), and when the upper surfaces of the left and right crawler mounting plates 2L and 2R of the carriage P coincide with or substantially coincide with the upper surface of the main floor 23, the lowering operation is stopped. To do. Then, as shown in FIG. 19, after the upper surfaces of the left and right crawler mounting plates 2L and 2R of the carriage P coincide with or substantially coincide with the upper surface of the main floor 23, the lowering operation of the lifter UD is stopped. By causing the combine CB to travel forward, the combine CB can be detached from the carriage P. In this state, as shown in FIG. 20, the carriage P is left in a sinking state, but after the combine CB is released, the lifter-UD is raised to lift the carriage P, and the inside of the factory is pulled by the automatic guided vehicle. It is transported and returned to the mission tractor-sliding workplace B1 of the tractor TR, which is the original work position, or the mission crawler assembly workplace A1 of the combine CB.

Next, the assembly operation of the tractor will be described.
In the mission-shaking workplace B1 of the tractor TR in FIG. 1, an operator performs an operation of assembling the traveling mission case 44 to the framed chassis frame 43. The base body of the tractor TR subjected to such work is supported by the carriage P as shown in FIG. 21. At this time, the distance between the left and right crawler mounting plates 2L and 2R in the carriage P is set in advance. The support member 16 is attached to the upper surfaces of the left and right crawler mounting plates 2L, 2R with a narrow space, and the chassis frame 43 is mounted on the upper end of the support member 16. The tractor-TR base is supported on the carriage P. The carriage P and the tractor-TR base are manually transported to the assembly line, and the carriage P side and the engaged bosses 26 and 26 on the endless conveyor 24 side are engaged by the engagement pins 13 and 13. The carriage P is pulled by the conveyor 24 and slowly moved along the assembly work process.

  When the carriage P supporting the tractor-TR base reaches the engine docking work position B2 of the tractor-TR in FIG. 1, the operator moves the engine against the chassis frame 43 as shown in FIG. Install E and install engine accessories.

When the carriage P supporting the tractor-TR base reaches the intermediate inspection position B3 in FIG. 1, the operator inspects the tractor-TR base.
Then, while the truck P on which the tractor-TR base is mounted is further pulled, as shown in FIG. 23, the operator can perform the assembly work around the operation seat 45 and the handle 46 with respect to the tractor-TR base and the bonnet. Assembling work of exterior parts such as 47 and assembling work of the tire 48 are performed. Thereby, the assembly of the tractor-TR is completed. Reference numeral 49 denotes a combine CB substrate that is mixed and produced after the tractor-TR substrate.

The tractor TR, which has been assembled in this way, is pulled in the state of FIG. 23 to the position before the final inspection / lifter device position E in FIG.
When the carriage P reaches the end of the endless conveyor 24, the engagement between the engagement pin 13 on the carriage P side and the engaged boss 26 on the endless conveyor 24 side is released, and the carriage P is carried onto the lifter UD. The At this time, the presence of the carriage P is confirmed by detecting the engaged boss 26 after the A limit switch 27 is released from the engagement with the engagement pin 13. Then, when the B limit switch 28 detects the engaged boss 26, the carriage carry-in cylinder 31 is operated, and the carriage P is carried onto the lifter UD, and the state shown in FIG. 24 is obtained.

  Then, when the C limit switch 29 is turned on and the vehicle that has reached the final inspection / lifter device position E is determined to be a tractor, the locking air cylinder 21 is extended to operate the lock arm 22. The free end side penetrates into the lower surface of the upper wall of the divided floor portions 18L, 18R on the left and right outer sides and supports the lower surface of the upper wall. As a result, the vertical movement of the left and right outer divided floor portions 18L and 18R is locked, and the left and right outer divided floor portions 18L and 18R cannot be lowered. As a result, the left and right inner divided floor portions 19L and 19R and the carriage P and the tractor TR placed on the upper surfaces of the left and right inner divided floor portions 19L and 19R are lowered by the lifter UD. When the four tires 48, 48, 48, 48 of the tractor-TR are brought into contact with the upper surfaces of the divided floor portions 18L, 18R on the left and right outer sides, and further when the cart P is lowered, the support member 16 attached to the cart P The tractor-TR is separated. When the lifter UD reaches the lowest position, the left and right drop prevention plates 32L and 32R housed inside the left and right divided floor portions 18L and 18 are moved to the left and right drop prevention cylinders ( Air-cylinder-) 33L and 33R project inward and upward respectively. The left and right drop prevention plates 32L, 32R protrude inside the tires 48, 48, 48, 48 of the tractor TR, thereby preventing the tractor TR from being removed. Thereafter, the tractor TR is caused to travel and moved from the final inspection / lifter device position E.

  Then, after the lifter UD is lifted and lifted, the carriage P after leaving the tractor TR is towed and transported inside the factory by an unmanned transport vehicle. Return to La Assembly Workplace A1 or Tractor-TR's Mission Shade Sicking Workplace B1.

  Although the above described the assembly operation of the combine and the assembly operation of the tractor separately, the feature of the present invention is that the combine and the tractor can be mixed and produced in the same assembly line. It goes without saying that many similar configurations are prepared.

  As described above, the tractor and the combine can be continuously mixed and produced by the same assembly line, and two kinds of assembly lines of the tractor-dedicated assembly line and the combine-dedicated assembly line are coexisted as before. Compared with what is made, the cost required for operation, such as installation cost of an assembly line and electric power cost, can be reduced.

  In addition, the assembly work time per worker can be shortened and the worker can easily become familiar with the assembly work, so the number of workers can be reduced and labor costs can be reduced. This makes it difficult for problems to occur when changing the number of workers.

It is a top view for description of an assembly line. Example 1 It is a top view for description of a cart. Example 1 It is a perspective view for description of a cart. Example 1 It is a top view for description of a cart. Example 1 It is a perspective view for description of a cart. Example 1 It is a side view for description of a cart. Example 1 It is a perspective view for description of a lifter part. Example 1 It is a perspective view for description of a lifter part. Example 1 It is a top view for description of the vicinity of the final inspection / lifter device position. Example 1 It is a sectional side view for explanation in the vicinity of the final inspection / lifter device position. Example 1 It is explanatory drawing of a control panel. Example 1 It is a perspective view for description of the combine base | substrate supported by the trolley | bogie in the workplace where a mission / crawler is assembled. Example 1 It is a perspective view for explanation of a combine base in a main harness routing work position. Example 1 It is a perspective view for explanation of a combine base in a threshing docking position. Example 1 It is a perspective view for description of a combine in a cutting docking position. Example 1 It is a perspective view for description of a combine in the final inspection / lifter device position. Example 1 It is sectional drawing for description which shows the raise state of a lifter. Example 1 It is sectional drawing for description which shows the descent | fall state of a lifter. Example 1 It is a perspective view for explanation which shows a state before making a combine remove from a lifter. Example 1 It is a perspective view for explanation which shows the state after making a combine remove from a lifter. Example 1 It is a perspective view for explanation of a tractor base supported by a bogie in a mission-shearing workplace. Example 1 It is a perspective view for explanation of a tractor base in an engine docking work position. Example 1 It is a perspective view for description of the tractor before reaching the final inspection / lifter device position. Example 1 It is sectional drawing for description which shows the raise state of a lifter. Example 1 It is sectional drawing for description which shows the descent | fall state of a lifter. Example 1 It is an explanatory perspective view which shows the state after moving a tractor from on a lifter. Example 1

A1 Combiner's mission-crawler assembly workplace A2 Combiner's main harness routing work position A3 Combine's threshing docking position A4 Combine's mowing docking position B1 Tractor's mission-shaking dock B2 Tractor's engine docking Work position B3 Intermediate inspection position E Final inspection / lifter device position T Material place P Dolly UD Lifter
CB combine TR tractor
E Engine 1L Left lower frame 1R Right lower frame 2L Left crawler mounting plate (left travel device side support)
2R Right crawler mounting plate (right travel device side support part)
3 Support stage
4 Casters
5F Front expansion / contraction link 5R Rear expansion / contraction link 6 Vertical axis 7L Front left / rear link arm 7R Front / rear right link arm 8 Vertical axis 9 Connecting boss 10 Fixing tool (large)
11 Fixing Pin 12 Engaging Hole 13 Engaging Pin 14 Fixing Tool (Small)
15 fixed pin 16 support member (airframe side support part)
17 Engagement hole 18L Left outer divided floor (second divided floor)
18R Right outside split floor (second split floor)
19L Left inner split floor (first split floor)
19R Right inner split floor (first split floor)
20 Lifting device 21 Locking air cylinder
22 Lock arm 23 Main floor 24 Endless conveyor (moving means)
25 Slot 26 Engaged boss 27 A limit switch 28 B limit switch 29 C limit switch (first limit switch)
30 D limit switch (second limit switch)
31 Dolly carrying cylinder
32L Left fall prevention plate 32R Right fall prevention plate 33L Left fall prevention cylinder
33R Right fall prevention cylinder
34 Control panel 34a Power supply monitor lamp 34b Air pressure abnormality display lamp 34c Cylinder abnormality display lamp 34d Spare lamp 34e Operation start switch 34f Operation stop switch 34g Operation emergency stop switch 34h Automatic-manual switch 34i Reset switch 34j Decrease-up switch 34k Reverse-forward switch 34l Drop-out prevention plate loading / unloading switch 35 Stand frame 36 Traveling mission case 37L Left crawler 37R Right crawler 38 Front panel 39 Steering lever
40 Threshing Device 41 Tractor Base 42 Harvesting Device 43 Chassis Frame 44 Traveling Mission Case 45 Operation Seat 46 Handle 47 Bonnet 48 Tire 49 Combine Base

Claims (3)

The truck was detachable top to the support member of the left and right endless track mounting plate provided with a endless track mounting plate of the left and right freely lateral distance changing provided, along the該台car working process of the assembly line set only a moving means for moving Te, the dolly in fully assembled position or its vicinity of the vehicle in the assembly line provided lifter to lower the floor, the support surface of the carriage supporting the said lifter, placing the left and right endless track The left and right first divided floors on which the carriage is placed in a state where the left and right intervals of the mounting plate are narrowed, and the left and right sides where the left and right endless track belt placement plates are placed in a state where the left and right intervals are widened When assembling a vehicle having a wheel-type traveling device that is divided into two outer divided floor portions, the left and right distances between the left and right endless track belt mounting plates of the carriage are reduced and the left and right A support member is attached to the upper surface of the endless track mounting plate To support the vehicle bogie in a state of being floated traveling device of a wheel-type by placing the chassis frame of the vehicle to the upper end of the support member, the該台wheel while moving along the carriage to the mobile unit Assembling the supported vehicle, in a state where the assembly of the vehicle in the assembly line is almost completed and the movement of the carriage is stopped on the lifter, the second divided floor portion of the lifter is locked so as not to be lowered and the first divided floor is locked only lowers parts of the bogie by ground wheels type traveling apparatus of a vehicle supported at the upper end of the front Ki支 lifting member by lowering the floor on the upper surface of the second divided floor of the vehicle from the carriage They were separated, at the time of vehicle assembly operations having a traveling device of the endless track type, the left and right intervals left and right endless track mounting plate with removing the supporting member from the upper surface of the left and right endless track mounting plate of the carriage A vehicle in which the left and right endless track belts are placed on the upper surface of the left and right endless track belt mounting plates so that the vehicle is supported by the carriage, and the carriage is supported by the carriage while moving along the moving means. In the state where the assembly of the vehicle in the assembly line is substantially completed and the movement of the carriage is stopped on the lifter, the second divided floor portion of the lifter is unlocked and the second divided floor portion is dividing floor lowers the carriage to be substantially flush with the upper surface the floor of the left and right endless track mounting plate by lowering together to drive the vehicle after it Turkey is disengaged the vehicle from the truck A vehicle assembly system characterized by the above. In the state where the assembly of the vehicle equipped with the wheel type traveling device in the assembly line is substantially completed and the movement of the carriage is stopped on the lifter, only the first divided floor portion of the lifter is lowered to the first divided When the floor reaches the lowest lowered position, the left and right drop-off prevention plates housed inside the second divided floor that is locked so as not to descend can be projected inside the left and right wheels of the vehicle. The vehicle assembly system according to claim 1, wherein the vehicle is prevented from being derailed. A lifter for lowering the carriage supporting the vehicle from the floor surface, and the left and right both sides for placing the carriage in the state where the left and right distance between the left and right endless track belt placement plates is narrowed on the support surface for supporting the carriage of the lifter. The first divided floor portion on the inner side and the second divided floor portions on both the left and right outer sides on which the carriage in the state where the left and right space between the left and right endless track belt mounting plates is expanded are divided and formed. The first split switch is provided with a first limit switch for detecting a cart in a state where the left and right space between the left and right endless track belt mounting plates is narrowed, and the left and right endless track heads are mounted on the second split floor portion. A second limit switch for detecting a cart in a state where the distance between the left and right plates is widened is provided, and when the first limit switch is turned on, the vehicle supported by the cart is a vehicle equipped with a wheel-type travel device. It is determined that there is, and the second divided floor is locked so that it cannot descend, When only the floor portion is automatically lowered and the second limit switch is turned on, it is determined that the vehicle supported by the carriage is a vehicle having an endless track type traveling device, and the second division is performed. 2. A vehicle assembly system for use in a vehicle assembly system according to claim 1, further comprising a control device that unlocks the floor portion and automatically lowers the second divided floor portion together with the first divided floor portion. Facility.

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