JP6109704B2 - Tire molding machine and tire molding method - Google Patents

Description

  The present invention relates to a tire molding apparatus and a tire molding method for attaching a belt-shaped member constituting a tire on a molding drum.

  For the tire, a belt-shaped member constituting the inner liner, carcass, and sidewalls is sequentially pasted on the molding drum of the primary molding machine to form a cylindrical primary case, and then this primary case is transferred to the molding drum of the secondary molding machine. Then, it is deformed into a toroidal shape, and then a belt-shaped member constituting a belt and a tread is attached, and the obtained green case is vulcanized.

  In such a tire manufacturing process, a belt-shaped member constituting a tread or the like is formed to a predetermined length, and then supplied to the molding drum and stuck to the molding drum. Is displaced in the width direction of the belt-shaped member (in the direction of the rotation axis of the molding drum), there is a problem that the weight balance in the tire width direction deteriorates.

  In order to suppress such a deviation of the position where the belt-shaped member is attached, for example, in Patent Document 1 below, it is proposed to calculate the amount of positional deviation by measuring the center position of the tread by optical detection means. Document 2 proposes detecting a centering groove provided in a tread by a detector including a proximity switch, a photoelectric switch, and the like.

  However, in the methods disclosed in Patent Documents 1 and 2 described above, a band-shaped member formed by extruding from an extruder such as a tread rubber constituting a tread and being cut at a predetermined length is used in the width direction (extrusion). However, it is difficult to make the weight balance in the tire width direction uniform with high accuracy.

JP-A-4-279324 JP-A-6-8353

  The present invention has been made in consideration of such problems, and an object thereof is to provide a tire molding machine and a tire molding method capable of uniformizing the weight balance in the tire width direction with high accuracy.

  The tire molding machine according to the present invention includes a tray having a strip-like member attached to the upper surface, a molding drum rotatably supported, a cradle for moving the tray transferred from the outside to the molding drum, A control unit for controlling the rotation of the molding drum and the movement of the cradle, and the control unit is configured such that the tip of the belt-shaped member attached to the tray is in contact with the lower surface of the molding drum. Left weight for detecting the weight of the left side of the tray transferred to the cradle in a tire molding machine that advances the tray in synchronization with the rotation of the molding drum and attaches the band-shaped member to the molding drum A detection unit, a right weight detection unit that detects the weight of the right side of the tray, and a displacement in the left-right direction of the belt-like member attached to the tray from detection values of the left weight detection unit and the right weight detection unit amount A calculation unit calculating for, characterized in that on the basis of the position displacement amount which the calculation unit is calculated and a moving mechanism for moving the tray in the lateral direction.

  As a preferable aspect of the tire molding machine according to the present invention, the left weight detection unit and the right weight detection unit may include a plurality of weight sensors provided at intervals in the movement direction of the tray, and more preferably. May comprise three weight sensors.

  In the tire molding method according to the present invention, the tray is advanced in synchronization with the rotation of the molding drum in a state where the tip of the belt-like member attached to the upper surface of the tray is in contact with the lower surface of the molding drum. In the tire molding method for attaching the belt-like member to the molding drum, the weights of the left and right side portions of the tray are detected, and the left and right sides of the belt-like member attached to the tray are detected from the detected weights of the left and right side portions of the tray. After calculating the positional deviation amount in the direction and moving the tray in the left-right direction based on the calculated positional deviation amount, the tray is advanced in synchronization with the rotation of the molding drum, and the belt-like shape is added to the molding drum. A member is affixed.

  As a preferred embodiment of the tire molding method according to the present invention, the weights of the left and right side portions of the tray are detected by a plurality of weight sensors provided at intervals in the moving direction of the tray at the left and right side portions of the tray. More preferably, the weights of the left and right sides of the tray may be detected by three weight sensors.

  According to the present invention, the amount of lateral displacement of the belt-like member attached to the tray is calculated from the weight of the left and right sides of the tray to which the belt-like member is attached, and the tray is moved in the left-right direction based on the calculated amount of positional deviation. Therefore, the weight balance in the tire width direction can be made uniform with high accuracy.

It is a top view of the tire molding device concerning one embodiment of the present invention. It is a side view of the tire shaping | molding apparatus shown in FIG. It is a front view of the tire shaping | molding apparatus shown in FIG. It is a block diagram which shows the control structure of the tire shaping | molding apparatus shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  A tire molding apparatus 1 shown in FIGS. 1 to 3 is an apparatus that affixes a band-shaped member (tread rubber) 2 made of a rubber material constituting a tread to a molding drum 10, and includes a tray 12 to which the band-shaped member 2 is affixed. The molding drum 10 is rotatably supported, the cradle 14 for moving the tray 12 to the molding drum 10, and the controller 16 for controlling the rotation of the molding drum 10 and the movement of the cradle 14.

  The tray 12 is an elongated rectangular plate having a smooth surface made of a metal such as aluminum, and an elongated rectangular strip member 2 is attached to the upper surface thereof.

  The cradle 14 is transferred from the outside of the tire molding apparatus 1 such as a tray cassette provided with a plurality of trays 12 to which the belt-like member 2 is attached, by a transfer (not shown), and is received so that the entire tray 12 can be received. It has an elongated rectangular shape.

  The molding drum 10 is rotatably supported by a horizontally disposed rotating shaft 18 and is connected to a driving device 20 such as a motor. A cradle 14 supported by a lifting device 22 is disposed below the molding drum 10.

  A linear guide 24 is fixed on the upper surface of the elevating device 22, and one end portion of a rail 26 provided on the lower surface of the cradle 14 is slidably supported. The rail 26 extends along a direction A (front-rear direction) A that is horizontal and perpendicular to the rotation shaft 18, and a plurality of rails 26 (for example, two) are spaced in the axial direction (left-right direction) B of the rotation shaft 18. The central portion of the rail 26 in the front-rear direction is slidably supported by a roller 28 disposed rearward A <b> 2 from the linear guide 24.

  As shown in FIG. 3, on the lower surface of the cradle 14, a rack 30 is fixed along the front-rear direction A between two rails 26 that are spaced apart in the left-right direction B. The pinion 32 that meshes with the rack 30 is fixed to the drive shaft 21 provided in the lifting device 22, and rotates by receiving power from the drive device 20.

  In such a cradle 14, when the driving device 20 operates, the power of the driving device 20 is transmitted through the driving shaft 21, the pinion 32, and the rack 30, so that the rail 26 moves the linear guide 24 in the front-rear direction A. Slide. As a result, the cradle 14 moves from the standby position P, which is separated from the molding drum 10 to the rear A2 in a plan view, with the tray 12 mounted thereon, and passes under the molding drum 10 from the standby position P. It moves to the rear A2 from below 10 and returns to the standby position P.

  Further, the drive shaft 21 to which the pinion 32 is fixed is connected to the rotating shaft 18 of the molding drum 10 by the transmission belt 36 via the clutch 34, and when the clutch 34 connects the drive shaft 21 and the transmission belt 36, When the molding drum 10 rotates in synchronization with the movement of the cradle 14 in the front-rear direction A and the clutch 34 disconnects the connection between the drive shaft 21 and the transmission belt 36, no power is transmitted from the driving device 20 to the molding drum 10. The cradle 14 moves in the front-rear direction A with the molding drum 10 stopped.

  In FIG. 3, reference numeral 38 denotes a support device for the molding drum 10. In FIG. 2, reference numeral 40 denotes a tension pulley that moves in the front-rear direction as the elevating device 22 moves up and down, and automatically adjusts the tension of the transmission belt 36.

  As shown in FIG. 1, a plurality of guide rollers 42 rotatably supported on a rotating shaft extending in the left-right direction B are provided on the upper surface of the cradle 14 in two rows on the left and right sides with a spacing in the front-rear direction A. In the present embodiment, a total of six guide rollers 42 are provided on each of the left and right, three in the front-rear direction A, the center, and the rear.

  On the plurality (six) of guide rollers 42, the tray 12 with the band-like member 2 attached is placed, and three guide rollers (front guide roller 42a, center guide) located on the left side B1 of the tray 12 are placed. The roller 42b and the rear guide roller 42c) support the front, center, and rear of the lower surface of the left side of the tray 12, respectively. Three guide rollers (front guide roller 42d, center) located on the right side B2 of the tray 12 The front guide portion, the central portion, and the rear portion of the lower right side surface of the tray 12 are supported by the portion guide roller 42e and the rear guide roller 42f).

  A weight sensor 44 that detects the weight of the tray 12 placed on the guide roller 42 is provided below each of the plurality of guide rollers 42.

  Specifically, the weight sensors 44a, 44b, 44c provided below the front guide roller 42a, the center guide roller 42b, and the rear guide roller 42c located on the left side B1 of the tray 12 are arranged on the left side of the tray 12. The left weight detection unit 46 is configured to detect the weight. That is, the left weight detection unit 46 includes three weight sensors 44 a, 44 b, 44 c that are provided at intervals in the front-rear direction A in which the tray 12 moves, and is located on the left front side of the tray 12 transferred to the cradle 14. Part, left center part, and left rear part are detected.

In addition, weight sensors 44d, 44e, and 44f provided below the front guide roller 42d, the center guide roller 42e, and the rear guide roller 42f located on the right side B2 of the tray 12 measure the weight of the right side of the tray 12, respectively. A right weight detection unit 48 for detection is configured. That means
The right weight detection unit 48 includes three weight sensors 44d, 44e, and 44f provided at intervals in the front-rear direction A in which the tray 12 moves, and includes a right front portion of the tray 12 transferred to the cradle 14, The weights of the right center part and the right rear part are detected.

  A rear end stopper 50 that locks the rear end of the tray 12 is fixed to the rear end portion of the cradle 14, and a front end pressing roller 52 that moves forward and backward by driving an air cylinder is provided at the front end of the cradle 14. It has been. When the front end pressing roller 52 moves rearward, the front end pressing roller 52 contacts the front end of the tray 12, presses the tray 12 rearward, and presses against the rear end stopper 50, thereby positioning in the front-rear direction A.

  A plurality of (two in this embodiment) side edge stoppers 54 are provided at one side edge (left side edge) in the left-right direction B of the cradle 14 with an interval in the front-rear direction A. A side edge pressing roller 56 that moves to the left and right by driving the air cylinder is provided at a position facing the side edge stopper 54 on the side edge (right edge).

  The side edge stopper 54 is a roller-type stopper that locks the left side edge of the tray 12, and is provided so that the position can be adjusted in the left-right direction B by receiving power from the driving device 55. When the side edge pressing roller 56 moves toward the opposite side edge stopper 54, the side edge pressing roller 56 contacts the right edge of the tray 12, presses the tray 12 leftward, and presses against the side edge stopper 54, thereby positioning in the left-right direction B. Do.

  Such a side edge stopper 54, the driving device 55, and the side edge pressing roller 56 adjust the position of the tray 12 in the left-right direction B by the drive device 55 changing the position of the side edge stopper 54 in the left-right direction B. Configure the moving mechanism.

  As shown in FIG. 4, the control unit 16 controls the operations of the driving device 20, the lifting device 22, the clutch 34, the front end pressing roller 52, the driving device 55, and the side edge pressing roller 56 according to the control program stored in the memory. To do. The control unit 16 is connected to the weight sensors 44a, 44b, 44c constituting the left weight detection unit 46 and the weight sensors 44d, 44e, 44f constituting the right weight detection unit 48, and each weight sensor 44a, Detection values detected by 44b, 44c, 44d, 44e, and 44f are input to the control unit 16, and a calculation unit that calculates the center position in the left-right direction B of the belt-like member 2 attached to the tray 12 from these detection values. Also works.

  Specifically, the control unit 16 first lowers the elevating device 22 so that the cradle 14 is separated from the molding drum 10 and arranges the cradle 14 at the standby position P. Furthermore, the front end pressing roller 52 and the side edge are arranged. The pressing roller 56 is moved backward (see FIG. 1).

  In this state, when the tray 12 is placed on the cradle 14 by a transfer (not shown) from the outside of the tire molding device 1, the front end pressing roller 52 is moved rearward so that the rear end of the tray 12 becomes the rear end stopper 50. Push to perform positioning in the front-rear direction A.

  The three weight sensors 44a, 44b, and 44c constituting the left weight detection unit 46 include the left front weight Weight Wa, the left central weight Wb, and the left rear part of the tray 12 transferred to the cradle 14. The three weight sensors 44d, 44e, 44f constituting the right weight detector 48 respectively detect the weight Wc of the right front portion of the tray 12 transferred to the cradle 14 and the right center portion. The weight We and the right rear weight Wf are detected. The detected weights Wa, Wb, Wc, Wd, We, Wf are input to the control unit 16.

  The control unit 16 calculates the average value Wl (= (Wa + Wb + Wc) / 3) of the weights Wa, Wb, Wc detected by the three weight sensors 44a, 44b, 44c constituting the left weight detection unit 46, and the right An average value W1 (= (Wd + We + Wf) / 3) is calculated from the weights Wd, We, Wf detected by the three weight sensors 44d, 44e, 44f constituting the weight detector 48.

Then, the control unit 16 calculates the calculated average value Wl of the left weight detection unit 46 and the average value Wr of the right weight detection unit 48 and the length in the left-right direction B of the belt-like member 2 stored in the memory of the control unit 16 in advance. The positional deviation amount S in the left-right direction B of the belt-like member 2 affixed to the tray 12 is calculated from the length (width) dimension Y based on the following formula (1), for example.

  Then, the control unit 16 controls the driving device 55 based on the calculated displacement amount S to adjust the position of the side edge stopper 54 in the left-right direction B, and then directs the side edge pressing roller 56 toward the side edge stopper 54. To the right edge of the tray 12. As a result, the tray 12 moves in the left-right direction B so that the center in the left-right direction B of the belt-like member 2 stuck on the tray 12 coincides with the center of the sticking position of the belt-like member 2 on the molding drum 10.

  Then, the controller 16 retracts the front end pressing roller 52 away from the tray 12, and the tray 12 is guided by the side edge stopper 54 and the side edge pressing roller 56, and the front end pressing roller 52 and the rear end stopper 50 are guided. It is set as the state which can move to the front-back direction A between.

  Then, the control unit 16 operates the drive device 20 in a state where the clutch 34 disconnects the connection between the drive shaft 21 and the transmission belt 36, and moves the cradle 14 forward A1 while stopping the rotation of the molding drum 10. To do.

  Then, when the tip of the belt-like member 2 on the tray 12 placed on the cradle 14 reaches just below the molding drum 10, the control unit 16 causes the tip of the belt-like member 2 to abut the lower surface of the molding drum 10. The elevating device 22 is raised, and the drive shaft 21 and the transmission belt 36 are connected by the clutch 34. Thereby, the molding drum 10 starts rotating in synchronization with the movement of the tray 12 placed on the cradle 14 to the front A1, and the belt-like member 2 stuck on the tray 12 is pasted while being wound around the molding drum 10. Is done. At this time, a gap is generated between the rear end stopper 50 and the tray 12, and the winding of the band-shaped member 2 proceeds while the gap gradually increases according to the thickness of the band-shaped member 2. Then, when the molding drum 10 rotates once, the application of the belt-like member 2 to the molding drum 10 is completed.

  In the tire molding apparatus 1 of the present embodiment as described above, the left weight detection unit 46 detects the weight of the left side portion of the tray 12, and the right weight detection unit 48 detects the weight of the right side portion of the tray 12, and detects it. Since the position of the tray 12 is adjusted in the left-right direction B based on the positional deviation amount S in the left-right direction B of the belt-like member 2 attached to the tray 12 calculated from the left and right weights of the tray 12, the weight balance in the tire width direction is increased. The accuracy can be made uniform.

  In addition, in the present embodiment, the left weight detection unit 46 and the right weight detection unit 48 include a plurality of weight sensors 44a, 44b, 44c, and 44d provided at intervals in the moving direction (front-rear direction) A of the tray 12. 44e and 44f, the weight balance in the tire width direction can be made even more highly uniform.

DESCRIPTION OF SYMBOLS 1 ... Tire shaping | molding apparatus 2 ... Strip | belt-shaped member 10 ... Molding drum 12 ... Tray 14 ... Base 16 ... Control part 18 ... Rotating shaft 20 ... Drive device 21 ... Drive shaft 22 ... Lifting device 24 ... Linear guide 26 ... Rail 28 ... Roller DESCRIPTION OF SYMBOLS 30 ... Rack 32 ... Pinion 34 ... Clutch 36 ... Transmission belt 42 ... Guide roller 44 ... Weight sensor 46 ... Left weight detection part 48 ... Right weight detection part 50 ... Rear end stopper 52 ... Front end press roller 54 ... Side edge stopper 55 ... Driving device 56 ... side edge pressing roller

Claims (6)

A tray having a strip-like member attached to the upper surface, a molding drum rotatably supported, a cradle for moving the tray transferred from the outside to the molding drum, rotation of the molding drum, and the cradle A control unit that controls movement, and the control unit is configured to synchronize with the rotation of the molding drum in a state in which a tip of the belt-shaped member attached to the tray is in contact with a lower surface of the molding drum. In the tire molding machine that advances the tray and sticks the band-shaped member to the molding drum,
A left weight detection unit that detects a weight of the left side of the tray transferred to the cradle, a right weight detection unit that detects a weight of the right side of the tray, the left weight detection unit, and the right weight detection A calculating unit that calculates a lateral displacement amount of the strip-shaped member attached to the tray from a detection value of the part, and a moving mechanism that moves the tray in the lateral direction based on the positional displacement amount calculated by the calculating unit And a tire molding machine.   2. The tire molding machine according to claim 1, wherein each of the left weight detection unit and the right weight detection unit includes a plurality of weight sensors provided at intervals in a moving direction of the tray.   The tire molding machine according to claim 2, wherein each of the left weight detection unit and the right weight detection unit includes three weight sensors. The tray is advanced in synchronization with the rotation of the molding drum in a state where the front end of the belt-like member attached to the upper surface of the tray is in contact with the lower surface of the molding drum, and the belt-like member is attached to the molding drum. In the tire molding method,
Detecting the weights of the left and right sides of the tray, calculating the amount of lateral displacement of the strip-shaped member attached to the tray from the detected weights of the left and right sides of the tray, and based on the calculated amount of positional deviation Then, after moving the tray in the left-right direction, the tray is advanced in synchronization with the rotation of the molding drum, and the belt-like member is attached to the molding drum.   5. The tire molding method according to claim 4, wherein the weights of the left and right side portions of the tray are detected by a plurality of weight sensors provided at intervals in the moving direction of the tray at the left and right side portions of the tray. .   The tire molding method according to claim 5, wherein the weights of the left and right side portions of the tray are detected by three weight sensors provided on the left and right side portions of the tray.

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