JP3151399B2 - Work vehicle production facility - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle production facility for producing a plurality of types of work vehicles on a production line.

[0002]

2. Description of the Related Art In an agricultural tractor, which is an example of a work vehicle,
Since many engines are designed to be part of the fuselage, it cannot be said that the engine is assembled to the fuselage at the end of the fuselage production line,
In an airframe production line, the most efficient assembling area for assembling an engine is substantially determined at a specific position on the airframe production line.

[0003] When a plurality of types of agricultural tractors are produced by this, for example, as shown in Fig. 9, an engine production line 21 first produces a plurality of types of engines.
The completed engine is temporarily stored in the stock unit 22.
Next, when the production of a plurality of types of airframes is started on the airframe production line 23, it is checked whether an engine of a type to be assembled to an airframe of a type to be manufactured is placed in the stock unit 22 as a completed engine. There is a production facility configured to start production of the aircraft production line 23 later.

[0004]

As shown in FIG. 9, first, an engine is produced and the completion of the engine is confirmed.
Next, if the production facility of a work vehicle is said to start production of an airframe, as an order is received from a customer, production of an engine of a type corresponding to the order is sequentially started in the engine production line 21, After the engine is completed, the production of aircraft according to the order will be started sequentially. As a result, the production lead time is the sum of the time on the engine production line 21 and the time on the machine body production line 23, which is longer.

Therefore, a plurality of types of engines are produced in advance by the engine production line 21 in anticipation of an order from the customer, the completed engine is temporarily stored in the stock section 22, and then the order from the customer is ordered. According to the method, there is a method of sequentially starting the production of the aircraft according to the order on the aircraft production line 23. According to this method, the production lead time is as short as the time of the machine body production line 23. However, when an engine of the type corresponding to the order is not in the stock unit 22 when the order is placed, the production lead time is reduced. Until the engine according to the order is completed, the production of the aircraft according to the order cannot be started, so that the production lead time will be long. SUMMARY OF THE INVENTION An object of the present invention is to provide a work vehicle production facility capable of producing a model according to an order from a customer with a production lead time as short as possible.

[0006]

[Means for Solving the Problems]

[I] According to the features of claim 1, for example, as shown in FIG. 7, a plurality of types of engines are produced on an engine production line 4 while a plurality of types of aircraft are produced by an aircraft production line 1, and a stock unit 6 is produced. When an aircraft of a certain type reaches the assembling area 1a of the aircraft production line 1, an engine to be installed in the aircraft of this type is designated from among the engines placed in the stock unit 6, and Is assembled to the body in the assembly area 1a. As described above, according to the features of claim 1, a plurality of types of airframes and a plurality of types of engines are produced in parallel in the airframe production line and the engine production line. The time becomes short (about a little longer than this time).

In this case, the time on the engine production line 4 (from the start of production to completion) is generally shorter than the time on the body production line 1 (time from the start of production to the time of reaching the assembly area 1a). The completed engine can be temporarily stored in the stock section 6. As described above, in the aircraft production line 1, the aircraft is mounted in the assembling area 1a.
By temporarily storing a plurality of types of engines in the stock section 6 before reaching the
When a is reached, there is no possibility that there is no engine to be mounted on this aircraft.

[II] When finished engines sequentially appear from the engine production line, some of them may be defective. In such a case, it is necessary to repair the defective engine. is there. In such a state, according to the features of claim 1, the engines E1 to E4 completed in the inspection area 5 as shown in FIGS.
The engines E1 to E determined to be defective
4 is repaired. In this case, the repair order H is set for the engines E1 to E4 determined to be defective, and
The repair is performed from the top of the repair order H.

In this case, according to the feature of the first aspect, for example, FIG.
As shown in the figure, the defective types of engines E1, E2, E3
For each of the aircraft G1, G2, G3 to which the
Time T from the present time to reach the assembly area 1a
1, T2, and T3 are detected, and the shorter the times T1, T2, and T3, the higher the repair order H (1, 2, 3) of the defective type engines E1, E2, and E3 is set. As a result, if the engine to be assembled must be repaired quickly, the engine to be assembled will reach the assembly area, and a defective engine that says that assembly cannot be completed in time will be repaired earlier in the repair order, and the aircraft to be assembled will be assembled In the case of a defective engine that has enough time to reach the area, the repair order is lower.

[III] According to the feature of the second aspect, similar to the case of the first aspect, the "action" described in the above [I] and [II] is provided, and in addition to this, the following "action" is provided. "
It has. If, for example, an engine of the same type is determined to be defective by a predetermined number or more in the inspection area within a predetermined time, the engine of this type should be assembled even if the engine of this type is repaired with higher priority in the repair order. Repairs may not be completed in time for the aircraft to reach the assembly area.

Therefore, according to the second aspect of the present invention, when it is determined that the number of engines of the same type is equal to or more than a predetermined number in the inspection area within a predetermined time as described above, a plurality of types of engines are included in the engine production line. The production order is changed, and the engine of the type that cannot be repaired is produced with priority. In this case, the time required for the production of the engine is generally shorter than the time required for the production of the aircraft, so as described above, by giving priority to the engine of the type that cannot be repaired as described above, this type of engine is produced. This type of engine can be sent to the stocking section before the machine to be assembled reaches the assembly area.

[IV] According to the feature of claim 3, as in the case of claim 1 or 2, the above-mentioned [I] [II] or [II
I] described above, and in addition, the following “action” is provided. According to the feature of the third aspect, in a work vehicle that performs intermediate production between planned production and build-to-order production, the number of production vehicles can be set without excess or deficiency as described below. Thereby, by adding the production number setting means of claim 3 to the machine body production line and the engine production line of claim 1 or 2,
It is possible to shorten the time from the setting of the production number to the appearance of the completed work vehicle.

In a work vehicle that performs intermediate production between planned production and build-to-order production, a variety of situations and work forms are used, and therefore, the main parts (eg, engine, etc.) that are always equipped regardless of the order, and the order There are a plurality of types of selection parts selectively provided according to the conditions, and the work vehicle is constituted by a combination of the main parts and the selection parts according to the order.

According to a feature of the present invention, the work vehicle is divided into main parts G1 to E4 and selected parts P1 to Q2 as shown in the lower half of FIG. 1, for example, as shown in FIG. Production number S of parts G1 to E4, selected parts P1 to Q2
Is set. Next, for example, as shown in FIGS.
Is multiplied by the first ratio A1 to produce S
Is increased (S1), and the production number S of the selected portions P1 to Q2 is multiplied by the second ratio A2 to increase the production number S (S2).

In this case, the second ratio of the selected portion is set to be larger than the first ratio of the main portion. This is because, in a work vehicle composed of a combination of the main part and the selected part, the main part is always equipped regardless of the order, so even if there is a fluctuation in the order, the required number of the main part will be Increases or decreases substantially corresponding to the runout width. As a result, it is possible to judge that the change in the required number of the main parts due to the order is relatively small, and it is possible to judge that it is not necessary to increase the production number of the main parts set initially, so that the first ratio of the main parts is small. Can be

On the other hand, the selected portion is installed in the work vehicle or not installed depending on the order. If the order has a swing range, the selected portion is amplified so that the swing range is amplified. The required number of parts varies greatly. As a result, it is possible to determine that the change in the required number of the selected portions due to the order is relatively large, and to determine that it is necessary to sufficiently increase the production number of the initially set selected portions. Make things.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

(1) FIG. 7 shows a farm tractor production facility as an example of a work vehicle, and a mission production line 1 (machine production) for producing a plurality of types of missions (machines G1, G2, G3) on the same line. A production line 2 for producing a plurality of models G1, G2, G3 on the same line, a painting line 3, and a plurality of types of engines E1, E2, E3, E4 on the same line. Is provided with an engine production line 4 for producing the.

An inspection area 5 for inspecting the completed engines E1 to E4 coming out of the engine production line 4, a repair area 10 for repairing the engines E1 to E4 determined to be defective in the inspection area 5, a completed engine E1 to E4 Is provided, and a cabin welding line 7 and a cabin assembly line 8 are provided.

(2) (2) -1 Next, the setting of the production number of agricultural tractors performed by the control device 9 before starting the production will be described (corresponding to production number setting means). As shown in the upper half of FIG. 1, the agricultural tractor includes a plurality of types of aircraft G1, G of different types.
2, G3 (corresponding to the main part) and a plurality of different types of engines E1, E2, E3, E4 (corresponding to the main part) constitute the main body of the agricultural tractor. Options P1, P2, P
3, Q1, Q2 (corresponding to the selected part) are selectively provided.

The upper half of FIG. 1 shows a plurality of types of agricultural tractors that can be produced.
What engines E1 to E4 and options P1 to Q2 are assigned to each of the airframes G1, G2 and G3 based on
Is equipped. As shown in the lower half of FIG. 1 from the state shown in the upper half of FIG. 1, a plurality of types of aircraft G1, G2, and G3 that can be produced, a plurality of types of engines E1 to E4 that can be produced, and a plurality of types that can be produced. It is broken down into types of options P1 to Q2.

Next, as shown in FIG.
The total production numbers of the aircrafts G1, G2, G3, the total production numbers of the engines E1 to E4, the options P1, P2,
The total production number of P3 and the total production numbers of options Q1 and Q2 are set as production number S. This production number S is repeatedly updated at intervals of about two weeks.

When the production quantity S is set as described above, the production of the aircraft G1, G2, G3 and the engines E1 to E4 is performed as shown in FIGS. The number S is multiplied by the first ratio A1 to produce the number S
First production number S1 larger than
1, P2, P3 and the production numbers S of the options Q1, Q2 are multiplied by the second ratio A2 to set a second production number S2 larger than the production number S. In this case, the first and second ratios A1 and A2 are empirically derived from current market trends, past monthly production results, inventory status, simulations, and the like. The second ratio A2 is set to be larger than the second ratio A2.

(2) -2 Next, in the options P1 to Q2 in which the second production number S2 is set as described above, the shared parts a1 and b1 are found as follows, and the shared parts a1 and b1 are found as follows. a1, b1
Production numbers are reduced. As shown in FIG. 5, a plurality of types of options P1 to Q2 are divided into small groups having the same kind of function, such as a small group of options P1, P2 and P3 and a small group of options Q1 and Q2. Each of the small group options P1, P2, P3 is disassembled into parts a1, a2, a3, a4, a5, a6, a7. For example, option P1 is divided into parts a1, a2, a
3 is performed. As shown in FIG. 6, this operation is similarly performed for the options Q1 and Q2 of another small group, and the parts b
Decomposed into 1, b2 and b3.

As described above, the parts a1 to a7 and the part b
1, b2 and b3, options P1 to Q2
5 is reversed from the viewpoint of seeing the parts a1 to b3 from FIG.
For example, as shown in FIG.
2 is considered. In the state shown in FIG. 5, the options P1, P2, P3 of the small group
, The component a1 is used for all of the options P1, P2, and P3, the components a2 and a3 are used for the option P1, the components a4 and a5 are used for the option P2, and the component a
6, a7 are detected to be used for option P3. As a result, the part a1 is
It is detected that the component a1 is used for all of P1, P2, and P3.

In the state shown in FIG. 6, in the options Q1 and Q2 of the small group, the part b1 is
2, the component b2 is detected to be used for the option Q1, and the component b3 is detected to be used for the option Q2. As a result, it is detected that the component b1 is a dual-purpose component b1 used for all of the options Q1 and Q2.

As described above, options P1, P2, P3
When the dual-purpose part a1 and the dual-purpose part b1 for the options Q1 and Q2 are found, the production number of the dual-purpose parts a1 and b1 is reduced to the second production number S2 (options P1, P2, P3 and From the total production numbers of the options Q1 and Q2), the aircraft G1, G2, G3 and the engines E1 to E
4, the first production number S1. In other parts a2, a3, a4, a5, a6, a7, b2, b3 which are not shared, parts a2, a3 of options P1, P2, P3
3, a4, the total production number of the parts a3, a5, a7, and the total production number of the parts b2, b3 of the options Q1, Q2 are represented by the second production number S2 (the options P1, P2, P3 and the option Q1). , Q2).

(3) As described above, the airframes G1, G
2, G3 and the first production number S1 of the engines E1 to E4, the options P1, P2, P3 and the second production number S2 of the options Q1 and Q2 are set. Delay the start of the process to the limit. Next, as shown in FIG. 7, the production of a plurality of types of missions (machines G1, G2, G3) is first started by the mission production line 1 based on the order, and after a while, the order is placed. Based on engine production line 4
As a result, the production of a plurality of types of engines E1 to E4 is started. This is longer than the time required for the missions (machines G1, G2, G3) to reach the assembly area 1a of the engines E1 to E4, which will be described later (the time required for production).
This is because the time required for the 4 to reach the stock section 6 (the time required for production) is shorter. And options P1
Production of a cabin (not shown), one of the Q2s, is started on the cabin welding line 7 and another option P
Production of 1 to Q2 is started in another production line (not shown) or a subcontract factory.

In the mission production line 1, a plurality of types of missions (machines G1, G2, G3) are produced in the order in which the most efficient production can be performed.
Similarly, in the engine production line 4, a plurality of types of engines E1 to E
4 are produced. As a result, the order of the models flowing in the mission production line 1 and the engine production line 4 often does not match. When the completed engines E1 to E4 come out of the engine production line 4, the completed engines E1 to E4 are inspected in the inspection area 5, and the engines E1 to E4 that have passed the inspection are sent to the stocking section 6 and temporarily. Is placed.

In the mission production line 1, an assembly area 1a is set, and the mission (machine G1,
G2, G3), when the engines E1 to E4 are assembled, the missions (body G1, G3
2, G3) is assembled and arrives at the assembly area 1a. Based on feedback from the mission production line 1 and the machine production line 2, the control unit determines which type of mission (machines G1, G2, G3) is located in the mission production line 1 and the machine production line 2. 9 (corresponding to the body position detecting means).

As shown in FIG. 8, when a certain type of mission (body G2) reaches the assembly area 1a, when the engines E1 to E4 to be assembled to this type of mission (body G2) are the engine E2, This type of engine E2 is designated in the stock unit 6 (corresponding to a designation means). In accordance with the designation, the operator carries the designated type of engine E2 from the stock unit 6 to the assembly area 1a, and assembles the engine E2 to the mission (body G2) in the assembly area 1a.

(4) When the mission (body G1, G2, G3) completed to some extent comes out of the mission production line 1, the mission (body G1, G2
2, G3) is sent to the painting line 3 to perform painting, and then enters the machine production line 2. The cabin coming out of the cabin welding line 7 is sent to the painting line 3 for painting, and then enters the cabin assembly line 8.

In the machine production line 2, the machines G1, G
As the assembling of G2 and G3 progresses, the cabin coming out of the cabin assembling line 8 becomes
The other options P1 to Q2 are assembled to the aircraft G1, G2, and G3 at each position of the production line 2 of the machine. In the mission production line 1 before the machine production line 2, there are also options P1 to Q2 to be assembled.

Each of the mission production line 1, the machine production line 2 and the engine production line 4 has a repair line 11
In the mission production line 1, the machine production line 2 and the engine production line 4, when an abnormality occurs in the missions (machines G1, G2, G3) or the engines E1 to E4, the mission in which the abnormality has occurred ( Aircraft G
1, G2, G3) and the engines E1 to E4 are transferred to the repair line 11 for repair, and then returned to the mission production line 1, the machine production line 2 and the engine production line 4 again.

As described above, the completed machines G1, G2, and G3 come out of the production line 2 of the machine, and are simple in the period from coming out of the production line 2 of the machine to shipping. Options P1 and Q2 are for aircraft G1 and G
2, assembled into G3 and shipped.

(5) Next, the case where the completed engines E1 to E4 are inspected in the inspection area 5 and determined to be defective will be described. As shown in FIG. 8, the completed engines E1 to E4 come out of the engine production line 4 and the completed engines E1 to E4 in the inspection area 5.
4, the engines E1 to E determined to be defective
4 is sent to the repair area 10 without being sent to the stock unit 6.

The engines E1 to E4 determined to be defective are repaired in the repair area 10. In this case, the engines E1 to E4 determined to be defective are repaired in the repair order H (the engine has entered the repair area 10). Not the order), and the repair is performed from the higher repair order H, and the stock section 6
Send to

The setting of the above-mentioned repair order H is performed as follows. For example, as shown in FIG. 8, three types of defective engines E1, E2, and E3 are located in the repair area 10, and a mission (body G1, G2, G3) to which the defective types of engines E1, E2, and E3 are to be assembled. ) Is located at a position before the assembly area 1a. In this case, in each of the missions (machines G1, G2, G3), the time T1 (mission (machine G1)), T2 (mission (machine G2)), and T3 (mission (machine G3)) from the current time to reach the assembling area 1a. )) Is detected (corresponding to time detecting means), and the times T1, T2, T
As the number 3 is shorter, the repair order H (1, 2, 3) is set higher (corresponding to a setting means).

That is, as shown in FIG.
If the time T1 required to reach the assembly area 1a of the mission (body G1) to which the engine E1 is to be assembled is the shortest compared to the other times T2 and T3, the engine E1 of the defective model E1 Has the first place in the repair order H.

If a predetermined number of engines E1 of the same type are determined to be defective in the inspection area 5 within a predetermined time, for example, the engine E of this type is repaired in the repair area 10.
1 (the repair order H (1)), the mission (body G
Repair may not be in time before 1) reaches the assembly area 1a.

As described above, when a predetermined number of engines E1 to E4 of the same type are determined to be defective in the inspection area 5 within a predetermined time, a plurality of types of engines E1 to E4 are produced in the engine production line 4. Is changed, the engine E1 of the type that cannot be repaired in time is produced preferentially (corresponding to recombining means), and the mission (body G1) to which the engine E1 of this type is to be assembled
By the time the vehicle reaches the assembly area 1a, the engine E1 of this type is sent to the stock unit 6. As described above, the engine E1 to E4 are in time for the assembling area 1a due to the change in the order of production in the engine production line 4 because the missions (machines G1, G2, G3) reach the assembling area 1a as described above ( This is because the time required for the engines E1 to E4 to reach the stock unit 6 (the time required for production) is shorter than the time required for production.

[0041]

According to the first aspect of the present invention, in the work vehicle production facility, the completed engine is temporarily placed in the stock section so that the engine and the engine can be operated in parallel while supplying the engine to the aircraft production line without delay. In this way, even if there is a defect in the finished engine, the repair order is set and the engine is repaired appropriately, so that the model according to the order from the customer can be produced with the shortest production lead time. As a result, productivity and responsiveness to orders from customers can be improved.

According to the feature of the second aspect, the "effect of the invention" of the first aspect is provided similarly to the case of the first aspect. According to the second aspect of the present invention, even when a lot of defects occur in the completed engine, the engine that cannot be repaired in time is preferentially produced, so that the engine can be supplied to the body production line without delay. become,
Productivity and responsiveness to customer orders could be further improved.

According to the feature of claim 3, claim 1 or 2
"Effects of the Invention" of Claim 1 or 2 as in the case of
It has. According to the features of claim 3, in a work vehicle that performs intermediate production between planned production and build-to-order production, the work vehicle is divided into a main part and a plurality of types of selected parts, and the difference between the characteristics is grasped. By setting the production number of the main part to be smaller than the production number of, the work vehicle (main part and plural kinds of selected parts) can be produced without excess or shortage. As a result, it is possible to prevent a delay in delivery due to a shortage of production numbers and an increase in inventory due to excessive production numbers. , And the productivity of the work vehicle production facility as a whole and the responsiveness to customer orders can be further improved.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state where an airframe, an engine, and options are disassembled.

FIG. 2 is a diagram showing a state in which the number of aircraft, engines, and options are set.

FIG. 3 is a diagram showing a state in which a first production number of an airframe and an engine and an optional second production number are set.

FIG. 4 is a diagram showing the number of productions of optional parts for options.
Diagram showing the state where the number of production is reduced

FIG. 5 is a diagram showing a state in which a dual-purpose part in an option is found.

FIG. 6 is a diagram showing a state of finding a shared part in an option.

FIG. 7 is a diagram showing an arrangement of a mission production line, a machine production line, an engine production line, and the like.

FIG. 8 is a diagram showing a state of an assembly area, an inspection area, a stock section, and a repair area of a mission production line.

FIG. 9 is a diagram showing an arrangement of a conventional engine production line, a stock unit, and an airframe production line.

[Explanation of symbols]

 1 Aircraft production line 1a Assembly area 4 Engine production line 5 Inspection area 6 Stock section G1, G2, G3 Airframe (main part) E1, E2, E3, E4 Engine (main part) P1, P2, P3, Q1, Q2 Selection part T1, T2, T3 Time H Repair order A1 First ratio A2 Second ratio S Production number

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiro Kitajima 10 Sakano Nitta, Taniwahara-mura, Tsukuba-gun, Ibaraki Prefecture Inside the Kubota Tsukuba Plant (72) Inventor Yuzo Shibata 10-Sakano Nitta, Yawahara-mura, Tsukuba-gun, Ibaraki Pref. (72) Inventor Shinichi Nakano 1-1-1 Hama, Amagasaki-shi, Hyogo Pref. Kubota Production Technology Division (56) References JP-A-3-189277 (JP, A) JP-A Heisei JP-A-1-135452 (JP, A) JP-A-7-60619 (JP, A) JP-A-7-96448 (JP, A) JP-A-63-59791 (JP, A) U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 65/10 B23P 21/00 307 B23Q 41/04 B62D 65/18

Claims (3)

(57) [Claims] 1. A plurality of types of airframes (G
1), (G2), (G3) and a plurality of types of engines (E) on the same line.
1) An engine production line (4) for producing (E2), (E3), and (E4), and the engine production line (4).
Completed engines (E1), (E2),
Stock section (6) for temporarily storing (E3) and (E4)
And completed engines (E1), (E2), (E3),
An assembly area (1a) of the machine body production line (1) for assembling the machine body (G4) with the machine body (G1), (G2), (G3), and the machine body (G1) in the machine body production line (1). , (G
2) When (G3) reaches the assembly area (1a), the airframes (G1), (G1) in the assembly area (1a)
2), Engine (E1) to be assembled in (G3),
(E2), (E3), and (E4) are replaced with the engines (E1), (E2),
(E3) and (E4), and inspecting the completed engines (E1), (E2), (E3) and (E4) coming out of the engine production line (4). An inspection area (5), and a body position detecting means for detecting which type of body (G1), (G2), (G3) is in which position in the body production line (1), The engine (E) determined to be defective in the inspection area (5)
1), (E2), (E3), and (E4)
The aircraft (G1), (G2), (G
3) time detecting means for detecting the time (T1), (T2), (T3) from the present time to the assembling area (1a) based on the detection of the body position detecting means; The engine (E) determined to be defective in 5)
1), (E2), (E3), (E4) repair order (H)
To the time (T) detected by the time detecting means.
1) A work vehicle production facility comprising setting means for setting such that the shorter (T2) and (T3), the higher the order. 2. If the same type of engine (E1), (E2), (E3), (E4) in the inspection area (5) is determined to be defective in a predetermined number or more within a predetermined time, it is determined to be defective. Engines (E1), (E2),
The engines (E1), (E1) in the engine production line (4) are so arranged that (E3) and (E4) are preferentially produced.
The work vehicle production facility according to claim 1, further comprising a recombination means for rearranging the production order of (E2), (E3), and (E4). 3. The main parts (G1), (G2), (G3), (E1), (E2),
(E3), (E4), and a plurality of types of selection parts (P1), (P2), (P
3), (Q1) and (Q2). The main parts (G1), (G2), (G3) and (E
1), (E2), (E3), and (E4) production numbers (S),
And the plurality of selected portions (P1), (P2), (P
3), the production number (S) of (Q1) and (Q2) is set, and the main part (G) is determined based on a predetermined first ratio (A1).
1), (G2), (G3), (E1), (E2), (E
3), the production number (S) of (E4) is increased, and based on the second ratio (A2) larger than the first ratio (A1), the plurality of types of selected portions (P1), (P
3. The work vehicle production facility according to claim 1, further comprising a production number setting means for increasing the production number (S) of (2), (P3), (Q1), and (Q2).