JP3853070B2 - Device for forming pneumatic radial tire belt member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a belt member forming apparatus used for a pneumatic radial tire, and more particularly, a pneumatic radial tire belt member capable of efficiently performing a wide variety and a small amount of production only by using a single type of strip material. The present invention relates to a molding apparatus.
[0002]
[Prior art]
In general, the belt layer of a pneumatic radial tire is bias cut to a predetermined angle and width with a wide strip of calendered so as to impregnate unvulcanized rubber into a large number of alignment reinforcement cords drawn from a creel stand. Then, the strips that have been bias-cut are joined together so that the cut sides are on the left and right edges to form a long belt material, which is wound around a drum and once stocked. At the time of forming the belt layer, the belt material is pulled out from the drum and cut in a direction along the reinforcing cord to a length corresponding to the circumferential length of the belt layer to obtain a belt member for one tire.
[0003]
However, since the belt member for one tire has a different width, length, and angle depending on the tire size, the belt member formed as described above needs to stock belt materials having different dimensions for each tire specification. . Therefore, there is a problem that a wide stock space is required in order to prepare an extremely wide variety of belt members. In addition, since belt members of other tire specifications cannot be diverted, there is a problem that an end length is generated in the belt material for each tire specification in the tire production process, and the material is wasted or requires processing steps. Furthermore, in the case of multi-product low-volume production, there is a problem that it is necessary to frequently perform a setup change operation for exchanging a drum around which a long belt material is wound every time tire specifications are changed.
[0004]
[Problems to be solved by the invention]
The object of the present invention is to eliminate the problem of belt member stock space and end length for each tire specification by enabling production of belt members of various tire sizes by using only a single strip material. And it is providing the belt member shaping | molding apparatus of a pneumatic radial tire which can perform multi-product small quantity production efficiently.
[0005]
[Means for Solving the Problems]
  The present invention that achieves the above-described object includes a fixed-length feeding device that intermittently transfers a strip material having a constant width composed of a plurality of reinforcing cords, a conveyor that alternately and intermittently transfers the strip material in synchronization with the fixed-length feeding device, A cutting device that cuts the strip material at a cutting angle θ with respect to the longitudinal direction thereof, and a splicing device that joins strip pieces arranged so as to face each other on the conveyor are provided. The transfer direction can be changed with respect to the conveyor, and the cutting angle θ of the cutting device is the length L of the belt layer of one tire, the number N of strip pieces forming the belt layer, the strip material Formula specified by width A
θ = sin^-1(N x A / L)
Set N to be an integer atAnd
The fixed-length feeding device is composed of a crankshaft rotating at a constant rotational speed and a strip material feeding portion connected to the crank portion so as to reciprocate back and forth via a link, and the cutting device comprises the feeding portion. Configured to cut when the forward position is reachedIt is characterized by that.
[0006]
In the present invention configured as described above, the strip material is intermittently conveyed by a fixed length by a fixed length feeding device, and is sequentially cut by a cutting device. The strip pieces that have been cut into regular lengths are intermittently transported on the transport conveyor, and the sides are sequentially abutted and joined together by a splice device between them, and the belt layer of one tire consisting of an integer number of strip pieces is transported on the transport conveyor. A belt member having a length is formed.
[0007]
When the tire size is changed, the transfer direction of the standard feeder is changed with respect to the transport conveyor accordingly, and the cutting angle θ of the cutting device is changed so that N is an integer number according to the above formula, The crank fulcrum of the fixed length feeder is changed so that the cutting length is a predetermined length. By joining the strip pieces that have been cut into regular lengths, the sides of the strip pieces are sequentially brought into contact with each other, a belt member made up of an integer number of strip pieces according to tire specifications having different sizes can be obtained. Change the cutting angle θ, the cutting length, and the number of joints according to the tire size without changing the drum that winds up the long belt material every time the tire specifications are changed as before. It is possible to cope with belt members having various tire sizes.
[0008]
Therefore, it is possible to produce belt members of various tire sizes by using only a single strip material, thereby eliminating the stock space for each tire specification and performing a large number of setup changes without a large changeover operation. It is possible to efficiently produce small varieties. In addition, since the belt member is made of an integer number of strip pieces having the same width, it is possible to extremely reduce the occurrence of end scales.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an explanatory view of a belt member forming apparatus for a pneumatic radial tire according to the present invention. 1 is a creel stand for supplying a plurality of reinforcing cords f (supplying portion), 2 is a rubber coating device (supplying portion) for forming a strip material S by coating the reinforcing cord f with rubber, and 3 is a drawer for pulling out the strip material S. Device 4 is a festooner for temporarily retaining the strip material S, 5 is a constant feed device for intermittently transporting the strip material S, 6 is a cutting device for cutting the strip material S into strip pieces S ′, and 7 is a strip. A conveyor 8 for intermittently transferring the piece S ′ to the forming drum F side, and 8 is a splicing device for joining the strip pieces S ′.
[0010]
The creel stand 1 continuously feeds the reinforcing cord f from a plurality of reels (not shown) around which the reinforcing cord f is wound. The rubber coating device 2 is connected to the creel stand 1.
The rubber coating apparatus 2 aligns a plurality of reinforcing cords f and arranges them in parallel with each other at a constant pitch, and extrudes unvulcanized rubber to cover the rubber, and continuously forms a strip material S having a constant width. It is like that. The drawing device 3 is connected to the coating device 2.
[0011]
The drawing device 3 is configured to continuously pull out the strip material S formed by the rubber coating device 2 in the direction of the arrow X, and the reinforcing cord f is drawn out from the creel stand 1 by this drawing. Yes. The festooner 4 is connected to the drawer device 3.
[0012]
The festooner 4 is installed to absorb the speed difference between the drawing speed of the drawing device 3 and the feeding speed of the fixed length feeding device 5 and the stay due to intermittent feeding, and is supported rotatably as shown in FIG. The strip material S is suspended in the space 41 formed between the rollers 4a and 4b, and the strip material S is temporarily retained. The fixed feeding device 5 is connected to the festivaler 4 via a free roller conveyor or a table C.
[0013]
The fixed-length feeder 5 is configured to convey the strip material S intermittently at a constant length. Moreover, it is comprised so that turning movement is possible to both sides as shown by the arrow Y centering on the position O on the cutting line by the side of the cutting device 6, and the angle which supplies the strip material S with respect to the conveyance conveyor 7 can be changed. . Further, the feeding length for intermittent conveyance can be adjusted. The conveying conveyor 7 is connected to the fixed-length feeder 5 through the cutting device 6.
[0014]
The cutting device 6 sequentially cuts the strip material S conveyed by a fixed length by the fixed-length feeding device 5 into strip pieces S ′ at a predetermined cutting angle θ with respect to the longitudinal direction (conveying direction). It has become. The strip material S is cut in parallel with the moving direction of the conveyor 7. This cutting angle θ is θ = sin where L is the length of the belt layer of one tire, A is the width of the strip material S, and N is the number of strip pieces S ′ forming the belt layer.^-1In the formula (N × A / L), N is set to be an integer.
[0015]
For example, when the length L of the belt layer of one tire is 1800 mm and the width A of the strip material S is 10 mm, the number N of strip pieces is set to 73 by setting the cutting angle θ to 23.9 °. If the length L is 1800 mm as described above and the width A of the strip material S is 20 mm, the number N of strip pieces is 37 by setting the cutting angle θ to 24.3 °. The same applies if the belt specifications are changed to match the tire specifications. Thus, the belt member having the length L of the belt layer of one tire can be formed by joining together the integer number of strip pieces S ′. Here, the strip piece S ′ cut in a fixed length is transferred onto the transport conveyor 7.
[0016]
The conveyor 7 is configured to intermittently and alternately convey the strip pieces S ′ in synchronism with the fixed-length feeder 5, and is configured to intermittently convey the strip pieces S ′ toward the belt forming drum F side at a constant length. Yes. The feed amount P corresponds to the length of the cut surface of the strip piece S ′, and P = A / sin θ. Above the conveyor 7, the splicing device 8 is disposed.
[0017]
The splicing device 8 is configured to align the strip pieces S ′ transferred on the transport conveyor 7 and to join the strip pieces S ′ with each other. As the cutting angle θ is changed, the joining direction is changed so that it can always be spliced along the side of the strip piece S ′.
According to the apparatus having the above configuration, the plurality of reinforcing cords f supplied from the creel stand 1 are rubberized with unvulcanized rubber by the rubber coating apparatus 2 and are continuously formed into a strip material S having a constant width. The strip material S formed to have a constant width is drawn out by the drawing device 3 and sent to the festivaler 4, and then carried into the fixed length feeding device 5. In this fixed length feeding device 5, the strip material S is conveyed from the cutting position 6a of the cutting device 6 to the conveying conveyor 7 side by a length corresponding to the belt width.
[0018]
Next, the strip material S is cut at a cutting angle θ by the cutting device 6. The cut strip piece S′1 is transferred onto the conveying conveyor 7 and conveyed to the forming drum F side by the feed amount P. After the transport, the strip material S is transported again from the cutting position 6a to the transport conveyor 7 side by the length-feeding device 5 by the length corresponding to the belt width. It is cut and placed on the transport conveyor 7 adjacent to the previous strip piece S′1.
[0019]
Subsequently, the strip pieces S′1 and S′2 are aligned by the splicing device 8 and joined together with their sides butted. The joined strip pieces S′1 and S′2 are transported to the forming drum F side by a feed amount P on the transport conveyor 7.
[0020]
Thereafter, the steps of the constant feed of the strip material S by the regular feed device 5, the regular cut by the cutting device 6, the joining by the splice device 8, and the constant feed of the transport conveyor 7 are repeated. The strip material S which has been continuously formed and sent from the upstream side is sequentially cut into strip pieces, and the strip pieces are sequentially spliced in the width direction on the transport conveyor 7 so that an integral number of strips of the same width are obtained. A belt member Q having a length L of a belt layer of one tire including the pieces S′1, S′2, S′3. By winding the belt member Q around the belt forming drum F once, an unvulcanized belt layer can be formed. Since the belt member Q can be made by cutting the strip material S at the time of forming the belt layer, the conventional stock space becomes unnecessary. Further, since the belt member Q is formed from the strip pieces S′1, S′2, S′3.
[0021]
When the belt specification is changed in accordance with the change of the tire specification, the feed length of the strip material S that is regularly fed to the conveying conveyor 7 side by the regular feed device 5 is changed according to the specification, and the cutting device 6 Then, according to the changed length L, the angle θ at which the strip material S is cut is changed so that N becomes an integer number according to the above-described formula. The cutting angle θ is changed by turning the standard feeder 5 around the position O and changing the angle at which the strip material S is supplied to the transport conveyor 7. The splicing device 8 also changes the splicing direction according to the cutting angle θ, and also changes the feed amount of the transport conveyor 7. In this way, the strip pieces cut by changing the specification can be joined by sequentially butting the sides in the same manner as described above, thereby forming a belt member for one tire having a specification change consisting of an integer number of strip pieces. it can. Conventionally, it is necessary to perform a setup change operation in which a drum wound with a long belt material is changed every time the tire specification is changed. In the present invention, the above-described cutting angle θ and the cutting length are changed according to the change in the tire specification. By simply adjusting the number of joints, it is possible to cope with various tire sizes. Therefore, it is possible to produce belt members of various types of tires by using only a single strip material, thereby eliminating the stock space for each tire specification and without carrying out extensive setup change work. High-mix low-volume production can be performed efficiently.
[0022]
In the present invention, the constant-feed device 5 and the cutting device 6 are preferably mechanically connected as shown in FIG. 3 in order to perform the constant-feed and cutting completely synchronously. In FIG. 3, the constant-length feeding device 5 includes a feeding portion 51 that intermittently conveys the strip material S, and this feeding portion 51 is attached to a guide rail 53 on a support base 52 that extends in the front-rear direction (left and right in the drawing). Engage and move along the guide rail 53 in the front-rear horizontal direction. A side portion of the feed portion 51 and a crank portion 54a of a crankshaft 54 connected to the drive motor M via an endless chain 56 are connected by a link 55, and the crankshaft 54 is driven by the motor M as indicated by an arrow a. When rotating at a constant rotational speed, the feed section reciprocates back and forth as indicated by arrow b.
[0023]
Assuming that the distance from the rotation center axis K of the crankshaft 54 disposed upstream of the feeding portion 51 to the connection center J of the link 55 is D, the feeding distance R of the strip material S by the feeding portion 51 is R = 2D. Become. Further, the end portion 55a of the link 55 connected to the crankshaft 54 is connected and locked to a long hole 54b extending along the crank portion 54a, and by changing the connecting position in the long hole 54b, The feed distance can be changed. Reference numeral 57 denotes a first ratchet clamp provided in the feeding portion 51, which is movable together with the feeding portion 51. The strip material S is sandwiched when the feeding portion 51 moves forward in the left direction, and is released when the feeding portion 51 moves backward.
[0024]
The cutting device 6 includes a pair of upper and lower blade portions 61a and 61b, and the upper blade portion 61a is fixedly attached, whereas the lower blade portion 61b is disposed on the cam shaft 62, and the cam The shaft 62 can be moved up and down as indicated by an arrow c by the rotation of the shaft 62. The cam shaft 62 is connected to the motor M through an endless chain 63, and the lower blade portion 61b moves up and down by driving the motor M, and the strip material S is cut together with the upper blade portion 61a at the upper end position. Like to do. When the feed portion 51 reaches the forward movement position, the cam projection 62a of the cam shaft 62 rotating at a constant rotational speed pushes up the lower blade portion 61b to cut the strip material S. The ratio of the rotation of the camshaft 62 and the crankshaft 54 that feeds the feed section 51 is 1: 1 in the figure, and when the crankshaft 54 makes one revolution (the feed section 51 makes one reciprocation), the camshaft 62 also makes one revolution. However, the ratio may be 1: 2, 1: 3, or the like, and the camshaft 62 may rotate once when the crankshaft 54 rotates twice or three times.
[0025]
11 is a clamping means for clamping the strip material S when the feeding portion 51 moves backward, and is arranged between the fixed-length feeding device 5 and the cutting device 6 and is arranged adjacent to the front side of the blade portion 61b. A second ratchet clamp 11b is arranged on the upper side of the lower plate 11a. The clamp 11b holds the strip material S when the feeding portion 51 moves backward and releases it when the feeding portion 51 moves forward. S can be conveyed freely. Reference numeral 12 denotes a carry-in free conveyor or table arranged on the upstream side of the feeding unit 51.
[0026]
In this apparatus, when the motor M is driven, the crankshaft 54 rotates at a constant rotational speed as indicated by an arrow a, and the camshaft 62 rotates at a constant rotational speed as indicated by an arrow d. As the crankshaft 54 rotates (rotates 90 ° from the position shown in the figure), the feeding portion 51 advances to the forward position E, and the strip material S sandwiched by the clamp 57 on the feeding portion 51 is fixed beyond the cutting position 6a. Send a measure. The lower blade portion 61b pushed up by the projecting portion 62a of the cam shaft 62 that rotates at the same time as the strip material S is fed is lifted, and the strip material S cooperates with the upper blade portion 61a at its upper end position. Disconnect.
[0027]
When the crankshaft 54 further rotates, the feeding portion 51 moves backward. Since the front end portion of the strip material S is clamped by the clamp 11 b, the strip material S remains in the same position, and only the feeding portion 51 moves backward together with the clamp 57. When the feeding portion 51 is retracted to the retreat position Z, the feed portion 51 is advanced again, and the strip material S is transported beyond the cutting position by a certain length as described above, and the cutting device 6 cuts at a fixed length. By repeatedly performing this intermittent feeding and cutting, the strip material S is sequentially cut into regular strip pieces. Since the drive of the feed part 51 and the drive of the blade part 61b are mechanically connected, it is possible to always perform accurate cutting while maintaining good cutting timing. Further, since the rotational movement of the crankshaft 54 is changed to the linear movement of the feeding part 51 and the rotational movement of the camshaft 62 is changed to the linear movement of the blade part 61b, the feeding part 51 and the blade part 61b are respectively driven by electrical control. It can be operated at a high cycle compared to the case of cutting and can be cut quickly.
[0028]
FIG. 4 shows another example of the above-described constant-feed device 5 and cutting device 6 of FIG. Here, in the above-described constant-feed device 5 in FIG. 3, a belt conveyor 58 in which an endless conveyor belt 58c is wound around and supported between front and rear pulleys 58a and 58b is provided in parallel with the feed section 51. It is. The feeding portion 51 is disposed adjacent to the inside of the conveyor belt 58 c that goes around the upper side, and the strip material S is clamped to the feeding portion 51 by the first ratchet clamp 57 together with the conveyor belt 58 c. The strip material S on the conveyor belt 58c is conveyed with the circumferential movement of the conveyor belt 58c while being sandwiched between the first ratchet clamps 57 when the feeding portion 51 moves forward.
[0029]
According to this apparatus, since the strip material S clamped by the feeding portion 51 and the clamp 57 moves together with the belt conveyor 58, the strip material S can be transported more smoothly at a constant length. When the feed portion 51 is retracted, the second ratchet clamp 11b holds the strip material S and the first ratchet clamp 57 is released, so that only the feed portion 51 is retracted together with the clamp 57.
[0030]
When the reinforcing cord f of the strip material S is a steel cord, as shown in FIG. 4, it is preferable to arrange magnets 59 on the front, rear, or entire surface of the conveyor belt 58c that circulates in the upper side. Since the upper strip material S can be conveyed in a fixed size while being magnetically held on the conveyor belt 58c, the fixed amount of feed can be made more reliable.
[0031]
FIG. 5 shows still another example of the above-described fixed-length feeder 5 and cutting device 6 of FIG. In this embodiment, instead of the clamping means 11 of FIG. 3, a tip side feeding means 12 that positively feeds the tip side of the strip material S is provided between the fixed length feeding device 5 and the cutting device 6. . The leading end side feeding means 12 includes a rotatable pinch roll 12a that presses the leading end side of the strip material S, and a rotatable leading end side feeding roll 12b. The feeding roll 12b is connected to the rack 12c. It is driven to rotate by a pinion 12d.
[0032]
The pinch roll 12a and the feed roll 12b are arranged in the vicinity of the upstream of the cutting device 6 so that the feed roll 12b is opposed to the lower side. A rack 12c is disposed at the lower end of a bracket 12e projecting downward on one side of the lower end of the feeding portion 51 so as to extend along the conveying direction, and a pinion 12d is engaged with the lower side of the rack 12c. Yes. The pinion 12d is connected via a cam clutch (not shown) to one end side of a rotary shaft 12g that is horizontally provided horizontally on the left and right in the transport direction. When the rack 12c moves in the transport direction, the pinion 12d is connected to the rotary shaft 12g. Engagement causes the rotation shaft 12g to rotate together with the pinion 12d. On the other hand, when the rack 12c moves to the rear side of the conveyance, the engagement between the pinion 12d and the rotation shaft 12g is released, only the pinion 12d rotates, and the rotation shaft 12g rotates. It is supposed not to.
[0033]
Rotating shaft 12b of feed roll 12b₁And an endless chain 12i are wound between the rotary shaft 12g of the pinion 12d via sprockets 12f and 12h so as to transmit the rotation of the pinion 12d to the feed roll 12b. 12j is a rotatable roll disposed on the upper side of the pinion 12d, and a rack 12c is inserted between the roll 12j and the pinion 12d.
[0034]
The moving speed of the feeding part 51 and the surface speed of the pinch roll 12a are configured to be the same speed. In order to make both speeds the same, the pitch circle diameter (PCD) of the pinion 12d, the transmission ratio of the transmission chain 12i, and the diameter of the pinch roll 12a can be matched. For example, the PCD of the pinion 12d is d₁The PCD of the sprocket 12h arranged on the rotating shaft 12g of the pinion 12d is d₂The rotating shaft 12b of the feed roll 12b₁PCD of sprocket 12f provided in_ThreeWhen the diameter of the pinch roll 12a is D, d₁/ D = d₂/ D_ThreeIt is sufficient to satisfy the relationship.
[0035]
In this embodiment, the crankshaft 54 is directly connected to the drive motor M, and the end portion 55a of the link 55 is connected to the peripheral edge of the disc-shaped crank portion 54a. It may be configured as follows.
[0036]
According to this apparatus, when the feed unit 51 moves in the transport direction, the pinion 12d rotates in the direction of arrow a through the rack 12c, and the rotation is transmitted to the feed roll 12b through the chain 12i. Accordingly, the strip material S to be fed at regular lengths is sequentially fed to the cutting device 6 at the tip end sandwiched between the pinch roll 12a and the feed roll 12b. By being nipped and conveyed in this way, the strip material S can be more smoothly and regularly conveyed. On the other hand, when the feed unit 51 moves to the rear side of the conveyance, the engagement between the pinion 12 and the rotary shaft 12g is released, and only the pinion 12 rotates and the rotary shaft 12g does not rotate, so the feed roll 12b stops, The strip material S is sandwiched between the pinch roll 12a and the feed roll 12b and is kept in that position.
[0037]
In the present invention, the width A of the strip material S can be 5 to 60 mm, preferably 10 to 30 mm. The cutting angle θ is 15 to 45 °, preferably 20 to 30 °.
The strip material S is a fixed width that is formed in advance and wound around a drum, instead of forming the reinforcing cord f supplied from the creel stand 1 by rubber coating with the rubber coating device 2 as in the above embodiment. The long strip material S may be supplied.
[0038]
Moreover, in FIG. 1, although the forming drum F is connected with the conveyance conveyor 7, you may make it send a belt member to the forming drum F via an intermediate conveyor in the meantime.
In the embodiment shown in FIGS. 3 to 5, the rotational drive between the motor M and the camshaft, the crankshaft, and the rotation shaft of the pinion and the feed roll is transmitted by the chain and the sprocket. May be used as long as it is a transmission means capable of transmitting rotation.
[0039]
In the above-described embodiments of FIGS. 4 and 5, the constant feed of the standard feed device 5 and the cutting of the cutting device 6 are performed in a synchronized manner, so that the belt conveyor is used. It is also possible to provide 58 and the front end side feeding means 12 in which the fixed length feeding device 5 and the cutting device 6 are electrically synchronized with each other.
[0040]
【The invention's effect】
As described above, the pneumatic radial tire belt member forming apparatus of the present invention enables production of belt members of various tire sizes by using a single strip material, and this apparatus is directly connected to the belt forming machine. For example, the problem of the stock space and the end length of the belt member for each tire specification can be solved, and high-mix low-volume production can be performed efficiently.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of a belt member forming apparatus for a pneumatic radial tire according to the present invention.
FIG. 2 is a schematic explanatory view showing the main part of FIG. 1 as viewed from the side.
FIG. 3 is an explanatory diagram showing a configuration in which a fixed-length feeding device and a cutting device are mechanically connected.
FIG. 4 is an explanatory view showing another example of a configuration in which a fixed-length feeding device and a cutting device are mechanically connected.
FIGS. 5A and 5B show still another example of a configuration in which a constant-length feeding device and a cutting device are mechanically connected. FIG. 5A is a front view of a main part, and FIG.
[Explanation of symbols]
1 Creel stand (supply unit) 2 Rubber coating device (supply unit)
3 Drawer 4 Festooner
5 Standard feeding device 6 Cutting device
7 Conveyor 8 Splice device
11 Clamping means 11b Second ratchet type clamp
12 Tip side feed means 12a Pinch roll
12b Roll for feed 12c Rack
12d Pinion 12g Rotating shaft
12h Sprocket (transmission means) 12i Chain (transmission means)
51 Feeder 54 Crankshaft
54a Crank part 55 link
57 1st ratchet clamp 61a, 61b
62 Camshaft A Strip material width
F Belt forming drum M Drive motor
S strip material S 'strip
f Reinforcement cord θ Cutting angle

Claims (7)

A fixed length feeder that intermittently transports a strip material of a certain width composed of a plurality of reinforcing cords, a conveyor that alternately and intermittently transfers the strip material in synchronization with the fixed length feeder, and a cutting angle of the strip material with respect to its longitudinal direction A cutting device that cuts at a constant angle with θ, and a splicing device that joins strip pieces arranged so as to face each other on the transport conveyor are provided, and the transport direction of the standard feed device with respect to the transport conveyor The cutting angle θ of the cutting device can be changed, and the equation θ specified by the length L of the belt layer of one tire, the number N of strip pieces forming the belt layer, and the width A of the strip material = Sin ⁻¹ (N × A / L)
Set N to be an integer at
The fixed-length feeding device is composed of a crankshaft rotating at a constant rotational speed and a strip material feeding portion connected to the crank portion so as to reciprocate back and forth via a link, and the cutting device comprises the feeding portion. A device for forming a belt member for a pneumatic radial tire configured to perform a cutting operation when the vehicle reaches an advanced position . The belt member forming device for a pneumatic radial tire according to claim 1, wherein a continuous supply portion of the strip material is disposed on the upstream side of the fixed-length feeding device via a festooner for temporarily retaining the strip material. The belt member forming apparatus for a pneumatic radial tire according to claim 1 or 2, wherein the feeding member is provided with a first ratchet clamp that clamps the strip material at the time of forward movement and releases it at the time of backward movement . A belt conveyor in which a conveyor belt is supported by the feeding portion so as to be rotatable is juxtaposed so that the feeding portion is located inside the conveyor belt, and the strip material on the conveyor belt is transferred to the conveyor when the feeding portion advances. 4. The pneumatic radial tire belt member forming apparatus according to claim 3, wherein the belt member is conveyed along with the circumferential movement of the conveyor belt while being sandwiched by the first ratchet clamp together with the belt. 5. The second ratchet clamp according to claim 1, further comprising: a second ratchet clamp that sandwiches the strip material when the feeding portion is retracted and is released when the feeding portion is moved between the fixed-length feeding device and the cutting device. A device for forming a pneumatic radial tire belt member. 4. The first, second, or third aspect of the invention, further comprising a front-end-side feeding unit that sandwiches and conveys the strip material when the feeding portion moves forward and clamps the strip material when moving backward between the fixed-length feeding device and the cutting device. The pneumatic radial tire belt member forming apparatus according to claim. The front end side feeding means includes a pinch roll that presses the front end side of the strip material, and a rotatable feed roll provided on the lower side of the pinch roll, and is attached to the feed roll and the feed section. A rotation shaft of a pinion that engages with the rack is connected via a transmission means, and the feed roll is rotationally driven when the feed portion moves forward and stops rotating when the feed portion moves backward. A device for forming a pneumatic radial tire belt member.

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