JP4502720B2 - Raw tire molding method and tire molding system - Google Patents

Description

  According to the present invention, a raw tire is molded by sequentially assembling predetermined tire components on a molding drum that can be a rigid core at a plurality of fixed work stations arranged at predetermined positions. The present invention relates to a method and a tire molding system used therefor.

  A technique for molding a raw tire by moving a molding drum to each single-function work station, for example, in a predetermined or required order, and assembling predetermined tire components on the molding drum in a predetermined order. Various types have been proposed in the past, and the applicant has previously proposed a tire molding system of this type as Japanese Patent Application No. 2002-341275.

  In this tire molding system, a carriage supporting a molding drum is moved on a rail laid on the floor surface or the like, and assembly of tire components is sequentially performed at each work station arranged along the rail. The purpose of this is to position the molding drum on each work station with high accuracy on an endless rail having a substantially oval shape including an arcuate curved portion.

  This system is provided on a predetermined path of each work station for assembling each tire component on the molding drum, and a molding carriage that supports the molding drum and moves the molding drum to each work station. A carriage guide means for guiding the movement of the carriage, and the carriage guide means is provided on two inner and outer endless rails laid in parallel to each other and on the molded carriage, and each endless by a roller or a ball. Rolls on at least both sides of the rail and includes wheels for regulating the position of the carriage in a direction orthogonal to the extending direction of the endless rail, each endless rail including at least one linear portion and one circle It is composed of an arc-shaped part, and both the parts are smoothly continuous, and the rail width of the arc-shaped part is an amount according to the radius of curvature of the arc-shaped part. It is made as a narrow width than the rail width of the linear portion.

In such a tire molding system, each of a plurality of molding trolleys on an endless rail is sequentially moved to a plurality of work stations, and different work is simultaneously performed on each molding drum at each of these work stations. By doing so, the raw tire as expected can be molded with high efficiency under a simple mechanism.
Japanese Patent Application No. 2002-341275

  However, in such a proposed technique, for example, as shown in part in a schematic plan view in FIG. 5, the molding carriage a, and consequently the molding drum b, are connected to the respective work stations on the endless rail c. In the figure, the first belt layer assembling station d, the second belt layer assembling station e, the belt interlayer rubber assembling station f, the third belt layer assembling station g, 4 belt layer assembly station h, tread undercushion rubber assembly station i, base tread rubber assembly station j, and cap tread rubber assembly station k, and Due to low flexibility for replacement, etc., tire structure switching, multiple types of tires with different structures It is difficult to flow molding or the like, also, for the occurrence of troubles such as defective molding, without the formation of branch passage was also inconvenience that it can not take out the molding drum to off-track.

  In addition, with this proposed technology, the design of each work station is designed in consideration of the balance of the cycle time, which is the time required for one process, to improve the capacity of the existing molding system. For this purpose, there was also a problem that it was difficult to add a work station having a different cycle time, in particular, a long cycle time.

  The present invention has been made in order to solve such problems of the proposed technology, and the object of the present invention is to eliminate the need for laying a special running track for the molding drum. Therefore, it is possible to easily and easily replace work processes, etc., and to prevent troubles from occurring, the molding drum can be easily and quickly removed from the molding movement area of the tire and reinserted into that area. The present invention also provides a raw tire molding method and a tire molding system used therefor, which can easily add work stations regardless of the cycle time.

According to the method of molding a raw tire of the present invention, a molding drum is moved to a plurality of work stations for assembling a predetermined tire constituent member on a molding drum that can be a rigid core in a stopped posture. When molding raw tires, each of the plurality of molding drums is placed on the required work station in the required order on the flat surface, for example, based on the action of the guided vehicle, according to the production command to the molding drum side. in, it is moved by independently of one another, a molding drum resulting in defective molding at the required position, in that to eliminate out of the molding transfer zone it.

In this method, the moving path of the molding drum is preferably changed according to the structure of the green tire.
In this case, the molding drum is moved by bypassing a specific work station, the same or different tire components are assembled on the single molding drum multiple times at the specific work station, etc. Can do.

Preferably, the moving path of the molding drum is changed according to the balance of cycle times between the respective work stations.
In relation to this cycle time, it is also possible to assemble a plurality of types of tire constituent members separately or simultaneously on the molding drum within one cycle time of a specific work station.

Further in this method, a molding drum resulting in defective molding at the required position, if discharged to the outside of its molding transfer zone, correct the defective molding, the molding drum after the repair or the like, again molded movement It is preferable to return to the region.

The tire molding system of the present invention has a plurality of work stations for assembling a predetermined tire constituent member on a molding drum in a stopped posture, supports the molding drum, and moves the molding drum to a work station according to requirements . In accordance with an external command that can be used as a production command for a running cart that eliminates a molding drum in which molding failure has occurred at a required position and excludes it from the molding movement area. Thus, the guided vehicle travels on a flat surface by moving the molding drum to a work position of a predetermined work station and stopping it there.

  In the molding method of the present invention, for example, each of the molding drums mounted on an induction traveling vehicle that can run as a so-called AGV that travels on a flat surface is designated as a production command, which is also related to, for example, a production plan for a product tire. Under what kind of raw tires, including dimensions, structure, etc., they are independent from each other according to the order on how to form various working stations on the forming drum and in what order By moving to, it is possible to perform relative replacement of work processes for each molding drum with a high degree of freedom on a flat surface. It is possible to easily cope with mixed flow molding of tires having different structures.

Also, here, when troubles such as poor molding of the tire in the middle of molding or malfunction of the molding drum itself occur, the molding drum is moved to its molding movement area at the required position under the action of the guided vehicle. This can be easily and quickly taken out to the outer optimal position. On the other hand, the molding drum that has been corrected, repaired, or refurbished can be reinserted into the molding moving area easily and quickly. be able to.

  In addition, since the cycle time of each work station can be easily dealt with by adjusting and selecting the movement path of the molding drum, the work station intended to improve the performance of the molding system, etc. It becomes possible to respond flexibly to expansion and the like.

  Incidentally, in this case, the production command can be transmitted to the guided vehicle by an electromagnetic wave, a laser beam, or the like, or by a magnetic field generated on a dielectric wire laid on the floor surface or the like.

Thus here, a movement path of the molding drum, based on the transmission of the command to the inductive vehicle traveling on the flat surface of the trackless, depending on the structure of the green tire, quickly and smoothly, and to always change to an appropriate positive be able to.

  Therefore, according to the structure of the tire, at least one molding drum can be selectively moved by bypassing a specific work station, thereby further improving work efficiency.

  In other words, as in the proposed technology, when it is essential that the forming drum is guided by a rail or other track and sequentially passes through each work station, the multiple forming drums on the track are , Based on the tact time, which is the maximum process time required for the work process of each work station, it will be moved to the next work station all at once, so one or more molding drums, It is virtually impossible to bypass a specific work station. As a result, both the tires that can be bypassed and the tires that cannot be bypassed have the same molding time. I can't hope.

  Here, at a specific work station, when assembling a tire component member multiple times on one molding drum, for example, a belt interlayer rubber and a tread under cushion rubber made of the same type of rubber together, There is an advantage that the total number of work stations can be reduced.

  When changing the movement path of the molding drum according to the imbalance in cycle time between the respective work stations, for example, one or a plurality of ply cords are placed on the entire circumference of the molding drum. For work stations whose cycle times are particularly longer than those at other work stations, such as when carcass plies are attached to each other, multiple work stations that perform the same work are arranged, When the same carcass ply is formed on the respective molding drums sequentially by changing the mutual movement paths, the cycle required for forming the carcass ply as a whole Effectively improve work efficiency by effectively absorbing time imbalance. Can.

  Further, when a plurality of types of tire components are assembled sequentially or simultaneously on a molding drum within one cycle time of a specific work station, for example, two layers on the outer layer side in heavy duty tires for trucks and buses are used. In the case where the materials of the third belt layer and the fourth belt layer, which are the belt layers, and the extension angle of the belt layer cord are the same, and the respective layers are assembled sequentially or simultaneously, As long as the balance of time is not greatly lost, the number of work stations can be reduced, and the work efficiency can be further improved.

  By the way, when a molding drum that has caused molding defects or the like is excluded from the molding movement area, it is possible to prevent unnecessary consumption of tire components and time as compared with the case where molding is continued as it is. In addition, when returning the molding drum after correcting the molding defect outside the molding movement area to the molding movement area again, by continuing the subsequent assembly of the tire components, the already assembled tire There exists an advantage which can aim at the effective utilization of the time required for the structural member and its assembly | attachment.

  In the tire molding system according to the present invention, an guided vehicle equipped with a molding drum is moved to a working position of a predetermined work station in accordance with an external command transmitted thereto via electromagnetic waves or the like. After stopping the predetermined work there, the traveling vehicle is moved to the next predetermined station in the same manner under the above external command, and these are completed to form the raw tire. By repeatedly performing each guided vehicle that supports each molding drum, the above-described molding method can always be performed appropriately, reliably, and simply and easily.

  FIG. 1 is a schematic perspective view conceptually showing an embodiment of a tire molding system according to the present invention. In FIG. 1, S1 to S7 are layouts at predetermined positions on a floor surface in consideration of work efficiency. The devices D1 to D7, which indicate the work stations and are fixedly mounted on the work stations S1 to S7, are directly or indirectly, mostly indirectly, on the movable molding drum described later, in the stop posture thereof. In particular, it functions to assemble a specific type of tire component.

  Here, in the arrangement area A of the work stations S1 to S7, the molding drum BD, which can be a rigid core mounted on and supported by the guide traveling vehicle AGV as a traveling carriage, is moved when the raw tire is molded. This also corresponds to the molding movement area of the molding drum BD. Here, a plurality of assemblies of the guided vehicle AGV and the molding drum BD are arranged in the molding movement area A.

  Here, each molding drum BD, directly guided vehicle AGV, uses an external command that can be a production command, via an electromagnetic wave, a laser beam, or the like, or via a magnetic field or the like generated on a dielectric wire. Based on the transmission to this, it functions to move on the flat surface and move the molding drum BD to the working position of the predetermined work stations S1 to S7 and stop the positioning there. Repeat until the formation of the green tire on the drum BD is complete.

  By the way, the mounting support of the molding drum BD with respect to the guided traveling vehicle AGV is, as illustrated schematically in a side view in FIG. 2, the guided traveling vehicle AGV that can be an omnidirectional type self-propelled automatic guided vehicle, for example. In addition, the base portion of the molding drum BD can be fixed and the drum shaft DS can be driven and connected to the guided vehicle AGV for rotational driving of the tip molding portion PB of the molding drum BD.

  Here, the external operation command for the guided vehicle AGV is, for example, to move the molding drum BD by following each of the work stations S1 to S7 in any order according to the production plan of the product tire. Thus, it can be a command as to what kind of raw tire is to be molded on the molding drum BD.

In FIG. 1, the assembly B of the guided vehicle AGV and the molding drum BD is an example in which the molding drum BD in which molding failure has occurred is excluded to the outside of the molding movement area A, and the assembly C shows a bypass examples of work station S6, and the assembly D shows an example of bypassing the two work stations S6, S7, carries out the finished green tire GT out molding transfer zone a. On the other hand, the assembly E shows an example of carrying out the raw tire GT completed by tracing all the work stations S1 to S7.

  According to such a tire molding system, each of the plurality of molding drums BD is set on the flat surface on the basis of the production command to each guided vehicle AGV, and the required work stations S1 to S7, and thus the required The devices D1 to D7 can be moved independently of each other in the required order. After such movement, the devices D1 to D7 are held with the molding drums BD while the molding drums BD are stopped. Above, specifically, a specific tire constituent member is assembled on the tip molding part PB of the top part, mostly under its rotational displacement, and thereafter, similar movement of the molding drum BD and assembly of the tire constituent member are performed. Are repeated in the required order, the same type of raw tires of the same type or different from each other can be molded on each molding drum BD.

  Further, here, since the movement of the molding drum BD can be performed based on the free running of the guided vehicle AGV on a flat surface, the movement path of the molding drum BD is set according to the required structure of the raw tire. It can be easily changed with a high degree of freedom, and therefore the molding drum BD can be moved by bypassing a specific work station, and the order in which the molding drum BD approaches the respective work station can be changed. Is also easy.

  By the way, in the case of forming a raw tire by sequentially following the respective operation steps illustrated in FIG. 5, when the belt interlayer rubber and the tread undercushion rubber are the same rubber, the respective rubbers are used. Since it can be assembled at one work station, each work station can be arranged as shown in a schematic plan view in FIG. According to this, each molding drum BD is sequentially moved to the first and second work stations 1 and 2 adjacent to each other, and the first belt is placed on the molding drum BD at those stations 1 and 2. After assembling each of the layers and the second belt layer, the molding drum BD is moved to the third work station 3 where the belt interlayer rubber is assembled, then At the fourth and fifth work stations 4 and 5 adjacent to each other, the third belt layer and the fourth belt layer are assembled in sequence, and then the molding drum BD is moved again to the third work station 3, where By assembling the tread undercushion rubber, different types of tire constituent members can be assembled twice on the one molding drum BD at the third work station 3.

  Thereafter, the molding drum BD is moved by sequentially following the sixth and seventh work stations 6 and 7, and the base tread rubber and the cap tread rubber are assembled to the outer peripheral side of the tread undercushion rubber. This completes the molding of the required raw tire GT.

Therefore, the number of work stations installed can be reduced as compared with the case shown in FIG.
By the way, in the shared work station as described above, it is also possible to assemble the same kind of tire constituent member over two or more times according to the structure of the tire.

  In the case of molding a raw tire having a belt composed of three layers under a work station as shown in the figure, for example, the molding drum BD can be moved by bypassing the fifth work station 5, In this case, it is possible to effectively prevent the molding time from being extended due to the wasteful stay of the molding drum BD.

  Further, in the case shown in FIG. 3, when the third belt layer and the fourth belt layer to be assembled are made of the same material and the extension angles of the belt layer cords are also made equal, for example, Both layers can be assembled sequentially or simultaneously within one cycle time at either 5 or 6 work stations, which allows the other work station to be omitted, and The green tire molding time can be shortened by a time substantially corresponding to the cycle time at the other work station.

  Further, when molding a raw tire as described above, if a molding failure occurs in an intermediate product of the raw tire, or if a failure occurs in the molding drum BD or the like, the corresponding molding drum BD, As illustrated in FIG. 4, it is once removed outside the molding movement area A, and after repairing a molding defect that can be corrected, such as a molding drum BD, it is performed again in the molding movement area A. By returning to the next work station position, the subsequent assembly of the tire component can be continued, and according to this, the waste of the existing tire component and the assembly time thereof can be saved. be able to.

  Although the present invention has been described with reference to the drawings, the command system side or the guided vehicle side is provided with a self-learning function, such as the presence or absence of an end cover of a carcass ply, the presence or absence of a soft bead filler rubber, etc. In addition, when the number of tire constituent members to be assembled increases or decreases, the assembly of members such as those in which the rubber chafer is located outside and inside the side rubber, the inner liner rubber and the rubber chafer are pre-attached, post-attached, etc. In the case where the attaching order is reversed, or in the case of mixed-flow production with various types of switching of different types of tires with different materials and types, in addition to the timing and frequency of switching, the movement path of the molding drum BD, etc. are changed. The result is self-learning, the next change is optimally controlled, and then the same self-learning and optimal control are repeated thereafter to form a raw tire. Resulted in further improvement in the rate, The total production and distribution stocks can move the building drum BD to be optimum.

  The same applies to the case where a plurality of stations having the same function, such as a carcass ply assembly station and a belt layer assembly station, are provided and the number of operating units is selected.

1 is a schematic perspective view schematically showing an embodiment of a tire molding system according to the present invention. It is a rough-line perspective view which shows the example of mounting support to the guidance vehicle of a shaping | molding drum. It is a basic-line top view which shows the usage example of the tire shaping | molding system shown in FIG. It is a basic-line top view which shows the other usage example of the tire shaping | molding system shown in FIG. It is a partial approximate line top view which shows the example of a movement of the forming drum according to a proposal technique.

Explanation of symbols

A Molding movement area B, C, D, E Assembly S1-S7 Work station D1-D7 Equipment AGV Guided vehicle BD Molding drum PB Tip molding part GT Raw tire 1 First work station 2 Second work station 3 Third work Station 4 4th work station 5 5th work station 6 6th work station 7 7th work station

Claims (8)

In molding a raw tire on the molding drum while moving the molding drum to a plurality of work stations for assembling predetermined tire components on the molding drum in a stopped position,
Each of the plurality of molding drums is moved independently from each other in the required order to the required work station on the flat surface in accordance with the production command to the molding drum side, and the molding drum in which the molding defect has occurred is moved. A method for molding a raw tire that is excluded from the molding movement area at a required position .   The green tire molding method according to claim 1, wherein the moving path of the molding drum is changed according to the structure of the green tire.   The green tire molding method according to claim 1 or 2, wherein the molding drum is moved by bypassing a specific work station.   The raw tire molding method according to any one of claims 1 to 3, wherein a tire constituent member is assembled a plurality of times on one molding drum at a specific work station.   The raw tire molding method according to any one of claims 1 to 4, wherein a moving path of the molding drum is changed according to a balance of cycle times between the respective work stations.   The method for molding a raw tire according to any one of claims 1 to 5, wherein a plurality of types of tire constituent members are assembled on a molding drum within one cycle time of a specific work station. The method for molding a raw tire according to any one of claims 1 to 6 , wherein the molding drum after correcting the molding defect is returned to the molding moving area again. A plurality of work stations for assembling a predetermined tire components onto the building drum stopping position, to support the building drum is moved to the work station in accordance with the molding drum in a required, the building drum resulting in defective molding A tire molding system comprising a traveling carriage that is excluded from the molding movement area at a required position ,
A tire molding system serving as a guided vehicle that travels on a flat surface in which a traveling drum is moved to a working position of a predetermined work station and stopped there in accordance with an external command.

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