JP2008290208A - Tire cutting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire cutting apparatus capable of so cutting a tire that the divided cut pieces have the same shape. <P>SOLUTION: A turn table 14 on which the tire 12 is placed is supported on a base 13 rotatable about a predetermined axis L1. The turn table 14 is rotatingly driven about the predetermined axis L1 by a rotating part 15. A cutting blade 17 has an edge 16 facing the turn table 14, and the center thereof extends in the cutting direction X through the predetermined axis L1. A lifting part 18 liftingly drives the cutting blade 17 along the predetermined axis L1 between a contact position where the edge 16 is brought into contact with the turn table 14 and a separated position where it is separated from the turn table 14. A control part 19 so controls the rotating part 15 and the lifting part 18 that the rotating operation of the turn table 14 and the lifting operation of the cutting blade 17 are alternately repeated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tire cutting device for cutting a tire.

  Many discarded tires are reused. Waste tires are used, for example, as fuel, as tire materials, or as rubber material other than tires. Waste tires are not reused in a discarded state, but are reused after being segmented into chips. Considering the convenience of transporting and storing the waste tire, it is preferable that the occupied volume is small, and the waste tire is subdivided into chips in order to reduce the occupied volume.

  As a conventional technique, there is a biaxial shear cutter device that subdivides waste tires (see, for example, Patent Document 1). Since there is a limit to the size of waste tires that can be subdivided using this biaxial shear cutter device, when subdividing large waste tires that exceed the size that can be subdivided, It is necessary to cut the waste tire into a size that can be subdivided in advance as a pretreatment for conversion.

  FIG. 7 is a front view showing the waste tire 1 that performs pre-processing for subdivision. In FIG. 7, a portion of the waste tire 1 to be cut is represented by a two-dot chain line 2. FIG. 7 shows a case where the waste tire 1 is divided into eight parts. A cutting device that performs pre-processing for subdivision includes a cutting wire for cutting the waste tire 1. In the pretreatment for subdivision, the waste tire 1 is first arranged so that the direction in which the rotation axis of the waste tire 1 extends coincides with the direction in which the cutting wire extends. Next, the waste tire 1 is cut by moving the waste tire 1 toward the cutting wire. The waste tire 1 can be divided into a plurality of sliced sections by shifting the cutting position of the waste tire 1 and repeating the process of cutting the waste tire 1.

JP 2005-296742 A

  Since the waste tire 1 has a donut shape, when the waste tire 1 is divided into slices using a device of the prior art, the shapes of the divided sections are uneven. The divided waste tire 1 is transported to a place where the next process is performed or loaded for storage. When dealing with a plurality of sections of the waste tire 1, an operation having repetitiveness is inevitably performed. In an operation having repetitiveness, working efficiency of sections having different shapes is lower than that of handling sections having the same shape. In addition, it is difficult to load uneven sections densely, and the occupied volume when uneven sections are stacked may be larger than the occupied volume when sections having the same shape are stacked. Further, depending on the way of division, a section having a length close to the diameter of the waste tire may be cut out. Since the diameter of the waste tire 1 may be larger than the height of the worker, an operation for handling a section of the waste tire 1 having a shape longer than the height of the worker occurs, resulting in poor work efficiency.

  Accordingly, an object of the present invention is to provide a tire cutting device that can cut a tire so that divided sections have the same shape.

The present invention comprises a base,
A turntable that is supported by a base so as to be rotatable about a predetermined axis and on which a tire is placed;
Rotation means for rotating the turntable;
A cutting blade having a cutting edge facing the turntable, the cutting edge passing on the predetermined axis and extending perpendicularly to the predetermined axis;
Lifting means for driving the cutting blade up and down along the predetermined axis over a contact position where the blade edge contacts the turntable and a separation position where the blade edge separates from the turntable;
A tire cutting device comprising: a turning means and a control means for controlling the raising / lowering means so as to alternately repeat the turning operation of the turntable and the raising / lowering action of the cutting blade.

  Further, the present invention is characterized in that the control means controls the turning means so that the turntable slowly accelerates or decelerates at the start of turning of the turntable and at the stop of turning of the turntable. And

Furthermore, the present invention provides the control means,
When the number of divisions of the tire is 2 × n (the symbol n represents an integer of 2 or more), there are (n−1) turntables in one of the rotation directions around the predetermined axis. A first rotation operation that repeats rotation and stop, and a second rotation operation in which the turntable repeats (n−1) rotations and stops in the other rotation direction around the predetermined axis. Alternately and repeatedly controlling the rotating means so that the series of turntables in the first and second rotating operations are performed within a range of 180 °;
The elevating means is controlled so that the cutting blade is raised and lowered at the time of switching between the first turning operation and the second turning operation and every time the turntable stops.

  According to the present invention, the turntable is supported by the base so as to be rotatable around a predetermined axis. The turntable is rotated by a rotation unit controlled by the control unit. When the turntable rotates while the tire is placed on the turntable, the tire rotates as the turntable rotates. When the tire is placed on the turntable so that the rotation axis of the tire coincides with the predetermined axis on which the turntable rotates, the tire rotates about the rotation axis as the turntable rotates. The control means controls the turning operation of the turntable by controlling the turning means, and indirectly controls the turning of the tire.

  The cutting blade has a cutting edge facing the turntable, and the cutting edge passes on the predetermined axis and extends perpendicularly to the predetermined axis. This cutting blade is driven up and down by the lifting means controlled by the control means, and moves up and down along the predetermined axis line over a contact position that contacts the turntable and a separation position that separates from the turntable. When the cutting blade is lowered from the separation position to the contact position, the tire placed on the turntable is cut.

  In a state where the tire is placed on the turntable so that the rotation axis of the tire and the predetermined axis on which the turntable rotates coincide with each other, the control means rotates the turntable and raises and lowers the cutting blade. When the turning means and the lifting / lowering means are controlled so as to alternately repeat, the tire is divided into two on the plane including the tire rotation axis every time the cutting blade is lowered to the contact position. For example, if the turntable is rotated by (360 / number of tire divisions) °, the tire can be cut so that the divided sections have the same shape.

  According to the present invention, the turning means controlled by the control means slowly accelerates / decelerates the turntable when the turntable starts to turn and when the turntable stops. If the turntable is accelerated and rotated at a sudden angular acceleration at the start of rotation, the tire placed on the turntable slips due to the inertial force of the tire, and the rotation angle of the turntable Deviation occurs in the rotation angle. Also, if the turntable is decelerated and stopped at a sudden angular acceleration when the rotation is stopped, the tire slips due to the inertial force of the tire, and there is a difference between the rotation angle of the turntable and the rotation angle of the tire. Arise. In the present invention, since the turntable is slowly accelerated / decelerated, the tire can be prevented from slipping and the rotation angle of the tire can be controlled with high accuracy. As a result, the tire can be accurately cut into a desired shape.

  Further, according to the present invention, the first rotation in which the turntable repeats (n−1) rotations and stops in one of the rotation directions around the predetermined axis by the rotation means controlled by the control means. The operation and the second rotation operation in which the turntable repeats (n-1) rotations and stops in the other rotation direction around the predetermined axis are alternately repeated. A series of turntable rotations in the first and second rotation operations are performed within a range of 180 °. By the lifting means controlled by the control means, the cutting blade moves up and down at the time of switching between the first rotating operation and the second rotating operation and every time the turntable stops, and divides the tire into two parts. Thus, the tire is divided by 2 × n every time the first rotation operation and the second rotation operation are performed. In order to divide a tire 2 × n using conventional techniques, it is necessary to cut the tire 2 × n−1 times. In the present invention, when the tire is divided 2 × n, the tire is divided into n by a cutting blade. What is necessary is just to cut once, the number of times of cutting can be halved compared to the conventional technique, and the tire can be divided efficiently.

  FIG. 1 is a front view of a tire cutting device 11 according to an embodiment of the present invention. FIG. 2 is a plan view of the tire cutting device 11. FIG. 3 is a side view of the tire cutting device 11. The tire cutting device 11 divides 2 × n (the symbol “n” represents an integer of 2 or more) by cutting the tire 12. The tire cutting device 11 is used as a device that cuts a large tire 12 used in a vehicle larger than an ordinary vehicle such as a large vehicle or a specific large vehicle. The tire cutting device 11 of the present embodiment cuts a tire 12 having a mass of about 200 kg or more and less than 2000 kg, a diameter of about 3 m, and a width of about 1.2 m.

  The tire cutting device 11 includes a base 13, a turntable 14 that is supported by the base 13 so as to be rotatable around a predetermined axis L <b> 1, a rotating unit 15 that rotationally drives the turntable 14, and the turntable 14. A cutting blade 17 having a cutting edge 16 facing the surface, a lifting position for driving the cutting blade 17 up and down along a predetermined axis L1 over a contact position where the cutting edge 16 contacts the turntable 14 and a separation position where the cutting edge 16 moves away from the turntable 14. The unit 18 includes a control unit 19 that controls the rotation unit 15 and the lifting unit 18. The tire cutting device 11 is installed on a factory floor or the like. Hereinafter, the description will be made on the assumption that the tire cutting device 11 is installed.

  The turntable 14 has a disk shape, and is supported by the base 13 so that one surface 14a perpendicular to the thickness direction and the other surface 14b are horizontal. The turntable 14 is supported by the base 13 at the other surface 14b in the vertical direction Z so that the center axis coincides with a predetermined axis L1 around which the turntable 14 rotates. By arranging the turntable 14 in this way, the turntable 14 rotates around the central axis. The tire 12 is placed on one surface 14 a of the vertical direction Z of the turntable 14. The diameter of the turntable 14 is selected to be at least larger than the diameter of the tire 12 to be cut.

  The base 13 includes a first base plate 21 that contacts a factory floor, a support plate 22 that supports the turntable 14, and a beam portion 23 that supports the support plate 22.

  The support plate 22 has a disk shape. The diameter of the support plate 22 is selected to be approximately equal to the diameter of the turntable 14. The support plate 22 is disposed so that the center axis thereof coincides with the extension line of the center axis line of the turntable 14. The turntable 14 is supported on the surface of the upper Z <b> 1 in the vertical direction Z of the support plate 22.

  The first base plate 21 is provided at the end Z2 below the base 13 in the vertical direction Z and below the support plate 22. The first base plate 21 has a plate shape and is formed in a substantially disc shape. The diameter of the first base plate 21 is selected to be slightly smaller than the diameter of the support plate 22. The surface of the lower side Z2 of the first base plate 21 in the vertical direction Z comes into contact with the floor of a factory or the like.

  The beam portion 23 extends between the first base plate 21 and the support plate 22 in the vertical direction Z, and passes through the predetermined axis L1 in a direction X (hereinafter referred to as a cutting direction) X of a cutting blade 17 to be described later. Both end portions 23a protrude from the first base plate 21 and the support plate 22, respectively. The beam portion 23 is provided in the lower Z2 with respect to the cutting blade 17, and supports the support plate 22 so that the support plate 22 does not move due to stress applied to the base 13 when the tire 12 is cut by the cutting blade 17. The width W1 in the cutting direction X of the beam portion 23 is selected to be 3950 mm in the present embodiment.

  The base 13 extends in the vertical direction Z between the first base plate 21 and the support plate 22 at a position different from the position where the beam portion 23 is provided, and supports the support plate 22 so that the support plate 22 does not move. A plurality of base columns 24 are further provided. The base columns 24 are provided at both ends of the base 13 in the lateral direction Y perpendicular to the vertical direction Z and the cutting direction X, respectively.

  A second base plate 25 extending in one direction and the other in the lateral direction Y is formed at the lower end portion in the vertical direction Z of both end portions 23 a of the beam portion 23. The width W2 in the lateral direction Y of the second base plate 25 is selected to be 3200 mm in the present embodiment. Further, reinforcing ribs 26 are provided on one side and the other side in the lateral direction Y of both end portions 23 a of the beam portion 23. The reinforcing rib 26 connects the both end portions 23 a of the beam portion 23 and the second base plate 25. The reinforcing ribs 26 are formed so as to become wider in the lateral direction Y as they approach the second base plate 25 from the upper side Z1 of the both end portions 23a of the beam portion 23. The reinforcing rib 26 and the second base plate 25 prevent the tire cutting device 11 from tilting in the lateral direction Y.

  The base 13 further includes a plurality of lifting and lowering units 27 for lifting and lowering the support plate 22 in the vertical direction Z and floating from the beam unit 23. The floating elevating unit 27 is provided between the first base plate 21 and the support plate 22 and includes one or more first hydraulic cylinders 28 and a hydraulic unit 29 that drives the first hydraulic cylinders 28 to move up and down. Consists of. The floating elevating unit 27 in the present embodiment includes four first hydraulic cylinders 28. The four first hydraulic cylinders 28 are provided at intervals of 90 ° on the circumference around the predetermined axis L1. A rotatable roller 30 is provided at the upper end in the vertical direction Z of the piston rod of each first hydraulic cylinder 28. The roller 30 moves up and down in the vertical direction Z by the first hydraulic cylinder 28. The roller 30 is provided such that the rotational axis coincides with a straight line extending radially from the predetermined axis L1 in the horizontal plane. The hydraulic unit 29 drives each first hydraulic cylinder 28 uniformly so that each roller 30 rises uniformly. The floating elevating unit 27 raises the roller 30 to contact the support plate 22 and further raises the support plate 22 and the turntable 14. The rotating unit 15 rotates the turntable 14 in a state where the support plate 22 and the turntable 14 are supported by the rollers 30. The roller 30 that supports the support plate 22 rotates as the turntable 14 rotates. Since the support plate 22 and the turntable 14 are floated in this manner, the turntable 14 is rotated with the rotation of the roller 30 in a state in which friction with the beam portion 23 is eliminated. Therefore, the turntable 14 is rotated with a small force. can do.

  When the cutting blade 17 cuts the tire 12, the floating elevating part 27 lowers the roller 30 until the support plate 22 contacts the beam part 23. Since the support plate 22 is supported by the beam portion 23 and the base column 24 so as not to move, the turntable 14 supported by the support plate 22 can be prevented from moving when the tire 12 is cut. .

  The tire cutting device 11 further includes a gantry 31 provided on the upper side Z <b> 1 of the base 13, two support columns 32 that support the gantry 31, and an arrangement table 33 on which a part of the elevating unit 18 is arranged.

  The two support columns 32 are formed extending from the both end portions 23a of the beam portion 23 upward Z1. The gantry 31 is formed to extend in the cutting direction X, and the lower ends of both ends in the cutting direction X are supported by the upper ends of the columns 32.

  The arrangement table 33 is plate-shaped and is formed in a substantially rectangular parallelepiped shape. The placement table 33 is supported by the frame 31 with the side surface connected to the side surface of the frame 31 so that the surface perpendicular to the thickness direction Z is horizontal.

  The elevating unit 18 that drives the cutting blade 17 up and down in the vertical direction Z includes a holding unit 34 that holds the cutting blade 17, one or more second hydraulic cylinders 35 that elevate and lower the holding unit 34 in the vertical direction Z, and a second. And a hydraulic unit 29 for driving the hydraulic cylinder 35. The hydraulic unit 29 drives the second hydraulic cylinder 35 and also drives the raising and lowering of the first hydraulic cylinder 28 described above.

  The hydraulic unit 29 is provided on the arrangement table 33, and includes two hydraulic pumps 43, a hydraulic motor 44 that drives the hydraulic pump 43, a flow rate control valve that controls the flow rate of oil, and a first flow that controls the direction in which the oil flows. A one-way control valve 46 and a second direction control valve 36, and a tank 47 for containing oil are included. The hydraulic unit 29 drives the piston movement of the second hydraulic cylinder 35.

  The elevating unit 18 in the present embodiment includes three second hydraulic cylinders 35. Each second hydraulic cylinder 35 passes through the gantry 31 in the vertical direction Z and is held by the gantry 31, and is arranged at equal intervals in the cutting direction X. The second hydraulic cylinder 35 disposed at the center of the three second hydraulic cylinders 35 is disposed such that the central axis of the cylinder rod 37 substantially coincides with the predetermined axis L1.

  The holding portion 34 that holds the cutting blade 17 extends in the cutting direction X across the two columns 32. Guide grooves for guiding the lifting and lowering of the holding portion 34 in the vertical direction Z are formed between both end portions in the vertical direction Z on opposite side surfaces of the two columns 32. At both ends of the holding portion 34 in the cutting direction X, fitting portions that fit into the guide grooves formed in the two columns 32 are formed. The holding part 34 moves up and down in the vertical direction Z while being guided by the guide groove with the fitting part fitted in the guide groove of the support column 32. The upper end portion of the holding portion 34 is gripped by gripping portions 38 provided at the lower end portions of the cylinder rods 37 of the three second hydraulic cylinders 35. The holding part 34 moves up and down in conjunction with the raising and lowering of the cylinder rod 37 by being held by the three second hydraulic cylinders 35.

  The cutting blade 17 is attached to the lower end of the holding portion 34 so that the cutting edge 16 is desired by the turntable 14. That is, the cutting blade 17 is attached so that the cutting edge 16 is located in the lower Z2. The cutting blade 17 extends in the cutting direction X, and is attached so that the center of the cutting direction X is located on a predetermined axis L1. The length W3 of the cutting blade 17 in the cutting direction X is selected to be longer than at least the diameter of the tire 12 to be cut. The length W3 in the cutting direction X of the cutting blade 17 in the present embodiment is selected to be 3000 mm. For example, the cutting blade 17 has an upper end sandwiched between the holding portion 34 and the mounting plate 41, and a plurality of bolts 50 penetrating the mounting plate 41 and the upper end portion are fitted into screw holes formed in the holding portion 34. Mounted. The cutting blade 17 in the present embodiment is configured by two blades arranged in one and the other in the cutting direction X, respectively. The two blades are arranged so that the end surfaces are in contact with each other at the center in the cutting direction X of the cutting blade 17.

  The cutting blade 17 is held by the holding portion 34 and moves up and down in conjunction with the raising and lowering of the cylinder rod 37. Go up and down to Z. The distance H between the cutting blade 17 and the turntable 14 in a state where the cutting blade 17 is raised to the separation position where the cutting blade 17 is most separated from the turntable 14 is selected to be wider than the width of the tire 12 to be cut. It is chosen to be 1200 mm.

  In the present embodiment, the rotation unit 15 is realized by including an electric motor 39 such as an AC motor, a stepping motor, and a DC motor. A pinion 40 is attached to a shaft that rotates together with the rotor of the electric motor 39 of the rotating unit 15. A rack 42 that meshes with a pinion 40 that is attached to the rotating portion 15 is attached to the peripheral portion of the turntable 14. When the shaft of the rotating unit 15 rotates, the pinion 40 rotates with this shaft, and thereby the turntable 14 rotates around the predetermined axis L1. The turning direction of the turntable 14 is switched depending on whether the electric motor 39 of the turning unit 15 is rotated forward or backward. The rotation unit 15 further includes a measuring instrument that measures the number of rotations of the shaft, such as an encoder and a resolver. Based on the measurement result of this measuring instrument, the rotation angle of the turntable 14 is calculated. The rack 42 in the present embodiment is provided at the peripheral edge of the turntable 14 in the range of 135 ° around the predetermined axis L1, and the turntable 14 rotates in the range of 135 ° around the predetermined axis L1. Configured.

  The control unit 19 controls the rotation unit 15, the lifting unit 18, and the floating lifting unit 27. The control unit 19 is realized by a microcomputer including a central processing unit (abbreviated as CPU) and a storage device that stores a control program, a programmable controller, and the like. The control unit 19 reads and executes a control program stored in the storage device by the CPU, so that the rotation operation of the turntable 14 and the movement of the cutting blade 17 are alternately repeated. 18 and the elevating part 27 for floating are controlled.

  The tire cutting device 11 further includes a control panel 48. The control panel 48 is attached to one of the two columns 32. Specifically, it is attached to the side surface on the opposite side of the side surface facing the other column 32 among the side surfaces of one column 32. The control panel 48 includes a plurality of input keys 49. When the input key 49 is pressed by the user, a command corresponding to the user's operation is input to the control unit 19, and the control unit 19 performs control based on the input command.

  The tire cutting device 11 further includes a ladder 50 that is formed to extend in the vertical direction Z while being supported by the other column 32 and the frame 31 of the two columns 32. By using this ladder 50, the user can climb to the gantry 31 and the arrangement table 33, and the elevating unit 18 can be adjusted.

  FIG. 4 is a system diagram of the tire cutting device 11. The tank 47 and the first direction control valve 46 are connected by two passages, a first supply passage 51 and a first return passage 52. A hydraulic pump 43 driven by a hydraulic motor 44 is inserted into the first supply passage 51. The hydraulic oil stored in the tank 47 is sent to the first directional control valve 46 through the first supply passage 51 by the hydraulic pump 43 and supplied to each second hydraulic cylinder 35. The hydraulic oil sent from the second hydraulic cylinder 35 is sent to the tank 47 through the first directional control valve 46 and the first return passage 52.

  Two passages 53 and 54 are further connected to the first directional control valve 46. One of the two passages 53 and 54 (hereinafter referred to as a downward passage) 53 is branched into three passages, and the branched passages are respectively connected to the piston rod of the cylinder tube of the second hydraulic cylinder 35. To the head side 55. Of the two passages 53 and 54, the other passage (hereinafter referred to as an ascending passage) 54 is branched into three passages, and the three branched passages are the bistons of the cylinder tube of the second hydraulic cylinder 35, respectively. Connected to the rod side 56 with respect to the rod.

  The first direction control valve 46 switches the connection relationship between the passages 51, 52, 53, 54. The first direction control valve 46 is realized by a three-position switching valve that is switched by a manual switching valve, a mechanical switching valve, a pilot switching valve, an electromagnetic valve, an electromagnetic pilot switching valve, or the like. The first directional control valve 46 in the present embodiment is realized by a three-position switching valve that is switched by an electromagnetic valve controlled by the control unit 19.

  The first direction control valve 46 is controlled by the control unit 19 and is a lowered position when the cutting blade 17 is lowered, an elevated position when the cutting blade 17 is raised, and a stop position when the cutting blade 17 is stopped. Switch the spool position to. In the lowered position, the first supply passage 51 and the first lowering passage 53 are connected, and the first return passage 52 and the first raising passage 54 are connected. When the hydraulic pump 43 is driven in this state, the hydraulic oil in the tank 47 is supplied to the head side 55 with respect to the piston rod of the cylinder tube of the second hydraulic cylinder 35 and the piston rod of the cylinder tube of the second hydraulic cylinder 35. On the other hand, the hydraulic oil on the rod side 56 returns to the tank 47 and the cutting blade 17 descends. In the ascending position, the first supply passage 51 and the first raising passage 54 are connected, and the first return passage 52 and the first lowering passage 53 are connected. When the hydraulic pump 43 is driven in this state, the hydraulic oil in the tank 47 is supplied to the rod side 56 with respect to the piston rod of the cylinder tube of the second hydraulic cylinder 35 and the piston rod of the cylinder tube of the second hydraulic cylinder 35. On the other hand, the hydraulic oil on the head side 55 returns to the tank 47 and the cutting blade 17 rises. At the stop position, the first supply passage 51 and the first return passage 52 are closed, and the first raising passage 54 and the first lowering passage 53 are closed, so that the cutting blade 17 stops.

  The control unit 19 controls the hydraulic motor 44 and the first direction control valve 46 to raise the cutting blade 17 ascending, the cutting blade 17 ascending, and the cutting blade 17 stopped. And switch.

  The hydraulic unit 29 further branches from the second direction control valve 36, the second supply passage 61 branched from the first supply passage 51 and connected to the second direction control valve 36, and the first return passage 52. The second return passage 62 connected to the first hydraulic cylinder 28 and the second directional control valve 36 are connected to the rod side with respect to the piston rods of the cylinder tubes of the four first hydraulic cylinders 28. A second lowering passage 63 connected to the second lowering passage 63 and the second directional control valve 36 and branched and connected to the piston rods of the cylinder tubes of the four first hydraulic cylinders 28 on the head side. 64. Since the control of the second directional control valve 36 of the control unit 19 is substantially the same as the control of the first directional control valve 46 described above, redundant description is omitted. The control unit 19 controls the hydraulic unit 29 to switch between a rising state in which the roller 30 is raised, a lowering state in which the roller 30 is lowered, and a stopped state in which the roller 30 is stopped. Unlike the above-described first direction control valve 46, the second direction control 36 in the stopped state closes the second return passage 62, and also includes the second supply passage 61, the second lowering passage 66, and the second upward passage 64. And connect.

  Further, the control unit 19 controls the electric motor 39 of the rotating unit 15 to rotate the pinion 40 and rotate the turntable 14.

  FIG. 5 is a flowchart showing the processing of the control unit 19 when the tire 12 is divided into 2 × n. When the rotation axis L2 of the tire 12 is placed on the turntable 14 in accordance with the predetermined axis L1, and the user inputs an instruction to start dividing the tire 12 by operating the input key 49 of the control panel 48, the tire The process of dividing 12 starts and shifts from step s0 to step s1.

  In step s1, the control unit 19 controls the elevating unit 18 to lower the cutting blade 17. Specifically, the control unit 19 lowers the lifting unit 18 to lower the cutting blade 17 to a contact position where the blade edge 16 contacts the turntable 14, and then stops the lifting unit 18 to stop. 17 is stopped. As a result, the tire 12 is cut along a virtual cutting plane that includes the predetermined axis L1 and is perpendicular to the lateral direction Y. When the cutting blade 17 stops at the contact position, the process proceeds to step s2. In step s2, the control unit 19 controls the lifting unit 18 to raise the cutting blade 17. Specifically, the control unit 19 raises the lifting / lowering unit 18 to raise the cutting blade 17 to the separation position where it is most separated from the turntable 14, and then stops the lifting / lowering unit 18 to stop the cutting blade 17. .

  Next, the process proceeds to step s3, and the control unit 19 determines whether or not the turntable 14 has been rotated n-1 times, and if it has not been rotated n-1 times, the control unit 19 proceeds to step s4. Since the tire cutting device 11 in the present embodiment divides the tire 12 into eight with n = 4, the process proceeds to step s4 if the turntable 14 has not been rotated three times.

  In step s4, the control unit 19 controls the floating elevating unit 27 to raise the roller 30. Specifically, the control unit 19 raises the roller 30 until the support plate 22 floats from the beam portion 23 with the floating elevator unit 27 in the raised state, and then stops the floating elevator unit 27 to stop the roller 30. Stop. Next, the process proceeds to step s5, where the control unit 19 controls the rotation unit 15 to rotate the turntable 14 around the predetermined axis L1 and stop it. Thus, since the turntable 14 is rotated in a state where the support plate 22 is supported by the roller 30, the force is smaller than when the turntable 14 is rotated while the support plate 22 is in contact with the beam portion 23. The turntable 14 can be rotated. In the present embodiment, in step s5, the turntable 14 is rotated 360 / (2 × n) ° to one d1 in the rotation direction. Specifically, since n = 4, the 45 ° turntable 14 is rotated. Next, proceeding to step s6, the control unit 19 controls the floating elevating unit 27 to lower the roller 30. Specifically, the control unit 19 lowers the roller 30 until the support plate 22 is placed on the beam portion 23 with the floating lift unit 27 in the lowered state, and then stops the floating lift unit 27 in the stopped state. 30 is stopped. Next, the process proceeds to step s7.

  In step s <b> 7, the control unit 19 controls the elevating unit 18 to lower the cutting blade 17 and cut the tire 12. Since the process of step s7 is the same as the process of step s1 described above, description thereof is omitted. Next, it transfers to step s8 and the control part 19 raises the cutting blade 17 by controlling the raising / lowering part 18. FIG. Since the process of step s8 is the same as the process of step s2, description is abbreviate | omitted. Next, the process proceeds to step s3, and the processes from step s4 to step s8 are repeated until the turntable 14 is rotated and stopped n-1 times. Thus, by performing the processing from step s4 to step s8, the turntable 14 repeats (n-1) rotations and stops in one d1 of the rotation direction around the predetermined axis L1. A dynamic operation is performed.

  If the turntable 14 is rotated and stopped n-1 times when the process proceeds from step s8 to step s3, the process proceeds to step s9 and the process of dividing the tire 12 into 2 × n is completed. .

  Thus, when the tire 12 is placed on the turntable 14, the control unit 19 first controls the lifting unit 18 to raise and lower the cutting blade 17, and then turns the turntable 14 and the cutting blade 17. Since the elevating unit 18 and the rotating unit 15 are controlled so as to alternately repeat the elevating and lowering operations n-1 times, the tire 12 is divided into 2 × n. In this embodiment, since the turntable 14 is rotated 360 / (2 × n) ° in step s5, the tire 12 is divided into 2 × n equal parts.

  When the tire 12 is divided into 2 × n, the divided tire 12 is taken out from the tire cutting device 11, and the tire 12 to be divided next is placed on the turntable 14. After the tire 12 is placed on the turntable 14, when the user operates the input key 49 of the control panel 48 and inputs a command to start dividing the tire 12, the process of dividing the tire 12 starts. The control unit 19 performs the same process as that shown in the flowchart of FIG. In the process of step s5 described above, the turntable 14 is rotated to one d1 in the rotation direction, but in this process, the turntable 14 is rotated to the other d2 in the rotation direction. That is, the turning direction of the turntable 14 is reversed with respect to the process of step s5 described above. By performing the processing from step s4 to step s8, the second rotation operation in which the turntable 14 repeats (n−1) rotations and stops in the other rotation direction d2 around the predetermined axis L1 is performed. It is.

  The series of turntables 14 in the first and second rotation operations are performed within a range of 180 °. Specifically, since the turntable 14 is rotated 360 / (2 × n) ° by one rotation and stop, 360 / (2 ×) by a series of first and second rotation operations. n) × (n−1) ° rotation. At n = 4, each of the first and second rotation operations rotates 135 °.

  The control unit 19 performs the processing of step s1 and step s2 at the time of switching between the first rotation operation and the second rotation operation, and controls the elevating unit 18 so that the cutting blade 17 moves up and down. Is controlled so that the cutting blade 17 moves up and down each time. That is, the control unit 19 performs the process shown in FIG. 5 in which the turntable 14 rotates in one direction d1 in the rotation direction in step s5 and the process in FIG. 5 in which the turntable 14 rotates in the other direction d2 in step s5. By alternately repeating the processing shown, each time the tire 12 is replaced, the replaced tire 12 is divided into 2 × n.

  FIG. 6 is a timing chart showing the operation of the tire cutting device 11 when the tire 12 is divided. FIG. 6 shows the operation of the tire cutting device 11 corresponding to the processing from step s4 to step s8 shown in FIG. In FIG. 6, the horizontal axis represents time. Immediately before the start of step s4, the first direction control valve 46 is stopped at the stop position, and the cutting blade 17 is stopped at the separation position separated from the turntable 14. The floating elevating unit 27 is in a stopped state and the motor 39 of the rotating unit 15 is stopped, and the support plate 22 is placed on the beam unit 23, and the hydraulic motor 44 is activated. continuing.

  At time t <b> 1, the floating elevating unit 27 changes from the stopped state to the raised state, and the roller 30 rises to float the support plate 22 from the beam unit 23. That is, the second direction control valve 36 of the floating lift 27 moves from the stop position to the lift position, and the roller 30 moves up. Next, at time t2, the floating elevating unit 27 changes from the raised state to the stopped state. That is, the second directional control valve 36 of the floating elevator 27 moves from the raised position to the stop position, the floating elevator 27 is stopped, and the roller 30 stops. As a result, the support plate 22 floats from the beam portion 23 and is supported by the roller 30. The process from time t1 to time t2 corresponds to the process of step s4 described above.

  At time t3, the state changes from the state where the electric motor 39 of the rotation unit 15 is stopped to the normal rotation state, and the turntable 14 is rotated to one d1 in the rotation direction. When the turntable 14 rotates 360 / (2 × n) ° around the predetermined axis L1, the electric motor 39 of the rotating unit 15 stops at time t4. The process from time t3 to time t4 corresponds to the process of step s5 described above.

  At time t <b> 5, the floating elevating unit 27 transitions from the stopped state to the lowered state, the roller 30 is lowered, and the support plate 22 is placed on the beam unit 23. That is, the second direction control valve 36 of the floating lift 27 is moved from the stop position to the lowered position, and the roller 30 is lowered. Next, at time t6, the floating elevating unit 27 transitions from the lowered state to the stopped state, and the roller 30 stops. As a result, the turntable 14 is supported by the support plate 22. The process from time t5 to time t6 corresponds to the process in step s6 described above.

  At time t7, the first direction control valve 46 of the elevating unit 18 moves from the stop position to the lowered position. As a result, the elevating unit 18 changes from the stopped state to the lowered state, and the cutting blade 17 is lowered. At time t8 when the cutting blade 17 reaches the contact position, the first direction control valve 46 of the elevating unit 18 moves from the lowered position to the stop position, and the lowering of the cutting blade 17 stops. As a result, the tire 12 is divided. The process from time t7 to time t8 corresponds to the process of step s7 described above.

  At time t9, the first direction control valve 46 of the elevating unit 18 moves from the stop position to the ascending position. Thereby, the raising / lowering part 18 changes to a raise state from a stop state, and the cutting blade 17 raises. At time t10 when the cutting blade 17 reaches the separation position, the first direction control valve 46 of the elevating unit 18 moves from the raised position to the stop position, and the rising of the cutting blade 17 stops. The process from time t9 to time t10 corresponds to the process in step s8 described above.

  By repeating the process from time t1 to time t10 n-1 times, the rotation of one turn d1 in the rotation direction of the turntable 14, the stop of the turntable 14, and the cutting of the tire 12 are repeated n-1 times. It is.

  Next, the process of repeating the rotation of the other d2 in the rotation direction of the turntable 14, the stop of the turntable 14, and the cutting of the tire 12 will be described. In this process, the process of rotating the turntable 14 in one direction d1 in the rotation direction is different from the operation of the electric motor 39 of the rotation unit 15, and therefore only the process from time t3 to time t4 having different operations. explain. In FIG. 6, the operation of the electric motor 39 of the rotating unit 15 when the turntable 14 is rotated in the other direction d <b> 2 is indicated by a two-dot chain line 57.

  At time t3, the state changes from the state where the electric motor 39 of the rotating unit 15 is stopped to the reverse state, and the turntable 14 is rotated to the other d2 in the rotating direction. When the turntable 14 rotates 360 / (2 × n) ° around the predetermined axis L1, the electric motor 39 of the rotating unit 15 stops at time t4.

  Thus, by rotating the electric motor 39 of the rotation unit 15 in the reverse direction and repeating the process from time t1 to time t10 n−1 times, the rotation of the other d2 in the rotation direction of the turntable 14 and the turntable 14 The stop and the cutting of the tire 12 are repeated n-1 times.

  The operation of the electric motor 39 of the rotating unit 15 from time t3 to time t4 will be described in more detail. The control unit 19 controls the rotating unit 15 so that the turntable 14 slowly accelerates / decelerates when the turntable 14 starts to rotate and when the turntable 14 stops rotating. That is, the electric motor 39 of the rotating unit 15 gradually increases the angular acceleration from time t3 so as to increase the angular velocity of the turntable 14, and when the predetermined angular velocity is reached, the angular acceleration is set to 0 and the angular velocity of the turntable 14 is increased. Is kept constant. Next, when the turntable 14 is stopped, the electric motor 39 of the rotating unit 15 accelerates the turntable 14 so as to lower the angular velocity of the turntable 14, and lowers the angular acceleration as it approaches time t4.

  According to the tire cutting device 11 of the present embodiment described above, the tire 12 is placed on the turntable 14 so that the rotation axis L2 of the tire 12 and the predetermined axis L1 on which the turntable 14 rotates coincide with each other. In this state, when the control unit 19 controls the rotation unit 15 and the lifting unit 18 so as to alternately repeat the rotation operation of the turntable 14 and the lifting operation of the cutting blade 17, the cutting blade 17 is lowered to the contact position. Each time, the tire 12 is divided into two on a plane including the rotation axis L2 of the tire 12. In the present embodiment, the turntable 14 is rotated by (360/2 × n) °, so that the tire 12 can be cut so that the divided sections have the same shape.

  Further, according to the tire cutting device 11 of the present embodiment, the turning unit 15 controlled by the control unit 19 is turned at the start of turning of the turntable 14 and at the stop of turning of the turntable 14. The table 14 is slowly accelerated or decelerated. When the turntable 14 is accelerated and rotated at a sudden angular acceleration at the start of rotation, the tire 12 placed on the turntable 14 slips due to the inertial force of the tire 12, and the turntable 14 rotates. There is a difference between the angle and the rotation angle of the tire 12. Further, when the turntable 14 is decelerated and stopped at a sudden angular acceleration when the rotation is stopped, the tire 12 slips due to the inertial force of the tire 12, and the rotation angle of the turntable 14 and the rotation of the tire 12 are increased. Deviation occurs in the angle of In the present embodiment, since the turntable 14 is slowly accelerated / decelerated, the slip of the tire 12 can be prevented, and the rotation angle of the tire 12 can be controlled with high accuracy. Thereby, the tire 12 can be accurately cut into a desired shape.

  Furthermore, according to the tire cutting device 11 of the present embodiment, the turntable 14 is controlled (n−1) times in one d1 of the rotation direction around the predetermined axis L1 by the rotation unit 15 controlled by the control unit 19. And a second rotation in which the turntable 14 repeats (n−1) rotations and stops in the other rotation direction d2 around the predetermined axis L1. The operation is repeated alternately. The series of turntables 14 in the first and second rotation operations are performed within a range of 180 °. The cutting blade 17 is moved up and down at the time of switching between the first rotation operation and the second rotation operation and every time the turntable 14 is stopped by the elevating unit 18 controlled by the control unit 19 to divide the tire 12 into two. . Thus, the tire 12 is divided by 2 × n every time the first rotation operation and the second rotation operation are performed. In order to divide the tire 12 by 2 × n using the conventional technique, it is necessary to cut the tire 12 2 × n−1 times. In the tire cutting device 11 of the present embodiment, the tire 12 is divided by 2 × n. When doing so, the tire 12 may be cut n times with the cutting blade 17, the number of cuts can be reduced to about half compared to the prior art, and the tire 12 can be divided efficiently.

In the tire cutting device 11 of the present embodiment, n is 2 or more, but the tire cutting device 11 is also preferably used when n is 1 and the tire 12 is divided into two. Although the tire cutting device 11 of the present embodiment is used as a device for cutting a large tire 12, it is also preferably used as a device for cutting a small tire.
The tire cutting device 11 according to the present embodiment automatically performs the processing shown in FIG. 5 according to the control of the control unit 19 to divide the tire 12, but the raising / lowering driving of the cutting blade 19 and the rotation driving of the turntable 14 are performed. The control unit 19 may control at least one of them according to the operation of the input key 49 by the user.

It is a front view of tire cutting device 11 of one embodiment of the present invention. 1 is a plan view of a tire cutting device 11. FIG. 1 is a side view of a tire cutting device 11. FIG. 1 is a system diagram of a tire cutting device 11. FIG. It is a flowchart showing the process of the control part 19 when dividing the tire 12 into 2xn. 3 is a timing chart showing the operation of the tire cutting device 11 when dividing a tire 12. It is a front view showing the waste tire 1 which performs pre-processing of subdivision.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Tire cutting device 12 Tire 13 Base 14 Turntable 15 Turning part 16 Cutting edge 17 Cutting blade 18 Lifting part 19 Control part 21 1st base plate 22 Support plate 23 Beam part 24 Base column 25 2nd base plate 26 Reinforcement rib 27 Floating Lifting section 28 First hydraulic cylinder 29 Hydraulic unit 30 Roller 31 Mounting base 32 Post 33 Arrangement base 34 Holding section 35 Second hydraulic cylinder 36 Second direction control valve 37 Second hydraulic cylinder rod 38 Grip section 39 Electric motor 41 Mounting plate 42 Rack 43 Hydraulic pump 44 Hydraulic motor 46 First direction control valve 47 Tank 48 Control panel 49 Input key 50 Ladder 51 First supply passage 52 First return passage 53, 54 passage 55 With respect to the piston rod of the cylinder tube of the second hydraulic cylinder Head side 56 No. Rod side 61 second supply passage 62 and the second return passage 63 second down passage 64 the axis of rotation of the axis L2 tire second prescribed elevated passage L1 in advance for Bisutonroddo hydraulic cylinder of the cylinder tube

Claims (3)

The base,
A turntable that is supported by a base so as to be rotatable about a predetermined axis and on which a tire is placed;
Rotation means for rotating the turntable;
A cutting blade having a cutting edge facing the turntable, the cutting edge passing on the predetermined axis and extending perpendicularly to the predetermined axis;
Lifting means for driving the cutting blade up and down along the predetermined axis over a contact position where the blade edge contacts the turntable and a separation position where the blade edge separates from the turntable;
A tire cutting device comprising: a rotating means and a control means for controlling the lifting means so as to alternately repeat the turning operation of the turntable and the raising / lowering action of the cutting blade.   The control means controls the turning means so that the turntable slowly accelerates or decelerates at the start of turning of the turntable and at the stop of turning of the turntable. The tire cutting device as described. The control means includes
When the number of divisions of the tire is 2 × n (the symbol n represents an integer of 2 or more), there are (n−1) turntables in one of the rotation directions around the predetermined axis. A first rotation operation that repeats rotation and stop, and a second rotation operation in which the turntable repeats (n−1) rotations and stops in the other rotation direction around the predetermined axis. Alternately and repeatedly controlling the rotating means so that the series of turntables in the first and second rotating operations are performed within a range of 180 °;
The said raising / lowering means is controlled so that the said cutting blade raises / lowers at the time of switching between a 1st rotation operation and a 2nd rotation operation, and whenever a turntable stops. Cutting device.

Images