JP4743591B2 - Conveyor device and joining device for tire strip member - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a carcass belt or the like constituting a pneumatic tire, and in particular, a belt-like member such as a steel cord covered with rubber is cut at a predetermined angle with respect to a longitudinal direction at a predetermined length. It is related with the apparatus which manufactures a new strip | belt-shaped member by producing a cutting sheet and joining the edge parts different from the cut surface of those cutting sheets one after another.

  In the process of manufacturing a carcass belt that is a constituent member of a pneumatic tire, the first belt-shaped member made of a steel cord covered with rubber is cut at a predetermined angle with respect to the longitudinal direction at predetermined intervals. Thus, there is a step of manufacturing a new second belt-shaped member by sequentially creating cut sheets having a parallelogram in plan view and successively joining ends different from the cut surfaces of the cut sheets.

  The manufacturing apparatus used in the process supplies a predetermined amount of the first belt-like member in a predetermined direction oblique to the conveying direction of the conveyor from a predetermined position on the side of the conveyor, and a side edge of the conveyor. A cut sheet is produced by cutting along the sheet, and the cut sheet is conveyed by a predetermined amount by the conveyor, and then a predetermined amount of the first strip member is supplied from the predetermined position to the predetermined direction on the conveyor. So that the side edge of the subsequent belt-like member is overlapped and joined to the rear edge of the preceding cutting sheet conveyed by a predetermined distance, and cut along the side edge of the conveyor to form the second belt-like member. It is configured.

  At this time, the movement amount of the conveyor is calculated in advance based on the prescribed width of the first strip member supplied on the conveyor and the required length of the overlapping portion, and the conveyor is driven and controlled according to the movement amount. Thus, when the succeeding strip sheet is fed onto the conveyor after the preceding cut sheet is conveyed by the set amount of movement, the trailing edge of the preceding cut sheet and the side edge of the succeeding strip member are The overlapping portions can be joined. That is, since the first belt-like member is sequentially supplied from the same position to the conveyor that moves intermittently for every fixed movement amount, the cut sheets are arranged on the conveyor with the end edges being overlapped at a constant pitch. 2 becomes a belt-like member.

  However, it is difficult to avoid variations in the width of the first belt-shaped member due to increase or decrease in the production speed of the production line. The variation in the width is a conveyor in which the cut sheet moves intermittently for every fixed movement amount. When arranged at a constant pitch above, the length of the overlapped portion will vary. This variation in the length of the overlapped portion results in poor bonding between the cut sheets, and in the case of the second belt-like member in which the cord is embedded, the pitch of the embedded cord varies, and the quality can be maintained. It becomes difficult.

  Therefore, in order to solve such a problem, the width of the first belt-like member supplied onto the conveyor is measured, and the amount of movement of the conveyor is controlled based on the measured value. There has been proposed a joining method and joining apparatus for belt-like members in which the length of the overlapping portion with the subsequent cut sheet is adjusted to be substantially constant (see Patent Document 1).

  First, the band-shaped member joining apparatus disclosed in Patent Document 1 will be described with reference to FIGS. 4 is a schematic plan view of the entire belt-shaped member joining apparatus 101, FIG. 4 is a side view of the belt conveyor in FIG. 5, FIG. 6 is a view seen from the direction of arrow C in FIG. It is a figure which shows the mode of joining of a member.

  The joining apparatus 101 includes a belt conveyor 10, which cuts the first belt-like member 2 obliquely to create a cut sheet, and joins edges that are different from the cut surface of the cut sheet one after another. The operation of forming the cut sheet 3 is performed on the belt conveyor 10.

  In the belt conveyor 10, a conveyor belt 13 is bridged between a pair of front and rear rotating rolls 11 and 12 in the transport direction D 1, and a timing pulley 12 a attached to the rotating shaft of one rotating roll 12 and a drive shaft of an AC servo motor 15. A timing belt 16 is bridged between the attached timing pulley 15a. Accordingly, when the AC servo motor 15 is driven, the rotary roll 12 is rotated via the timing belt 16, and the rotation of the rotary roll 12 advances and retracts the conveyor belt 13 and moves the second belt-like member 3 on the conveyor belt 13 back and forth. Let

  A roller conveyor 20 is provided for supplying the first belt-shaped member 2 from a fixed position on the side to the belt conveyor 10 in a fixed oblique direction D2. Note that a plate may be simply used instead of the roller conveyor 20. The roller conveyor 20 is arranged on the rotating roll 11 side so that the first belt-like member 2 can be supplied onto the conveyor belt 13 at an angle of 30 degrees from the left side with respect to the moving direction of the conveyor belt 13.

  Moreover, the cutting device 25 is arrange | positioned so that the cutter 26 may run along the left side edge where the 1st strip | belt-shaped member 2 in the conveyor belt 13 is supplied. The cutter 26 is attached to the lower end of a telescopic rod 27a projecting downward from the cylinder 27. The cylinder 27 itself is provided above the left edge of the conveyor belt 13 so as to be movable forward and backward in the conveying direction of the conveyor belt 13. Yes. Then, when the cylinder 27 lowers the cutter 26 and moves it back and forth, the cutter 2 6 cuts the first belt-like member 2 supplied on the conveyor belt 13 along the left edge of the conveyor belt 13. Can do.

  The first belt-like member 2 is formed by coating a plurality of steel cords 4 with rubber and molding them into a belt shape, and the steel cords 4 are embedded in the belt-like longitudinal direction. In addition, ear rubber is formed on both sides of the first belt-like member 2 in the process of extruding the first belt-like member 2 with a rubber extruder (not shown). As shown in FIG. The ear rubber is cut off, and the belt-like member 2 is supplied while the right ear rubber 2a is left.

  In order to transfer the first belt-like member 2 placed on the roller conveyor 20 onto the conveyor belt 13, a drawing device 30 is disposed above the conveyor belt 13. The drawing device 30 is provided with a suction plate 31 having a parallelogram that is substantially the same as the cut first belt-like member 2 (cut sheet) in a horizontal posture. Since the suction plate 31 is slightly wider than the first belt-like member 2 and incorporates an electromagnet, the first belt-like member 2 is sucked by sucking the steel cord 4 in the first belt-like member 2. be able to.

  The suction plate 31 is supported in a reciprocating manner along the conveying direction of the first belt-shaped member 2 between the upper end of the roller conveyor 20 and the upper portion of the conveyor belt 13 that is the extension of the suction plate 31. It can be moved up and down. Therefore, the suction plate 31 is lowered on the top surface of the first belt-like member 2 conveyed by the roller conveyor 20, and the top surface of the first belt-like member 2 is attracted by exciting the electromagnet, and the top is kept adsorbed. The first belt-like member 2 can be supplied onto the conveyor belt 13 by pulling it up to the conveyor belt 13 and pulling it down at a fixed position and demagnetizing the electromagnet. The suction plate 31 that is slightly wider than the first belt-like member 2 is used as a pressure joining means, and is located on the preceding cutting sheet and the subsequent belt-like member 2 with the end edges superimposed on the conveyor belt 13. The suction plate 31 is pressed to join the edge portions. A receiving plate 32 is provided along the conveyor belt 13 below the back surface of the conveyor belt 13 against the pressing of the suction plate 31.

  On both sides of the roller conveyor 20 for supplying the first belt-like member 2 to the conveyor belt 13, guide members 51 and 52 for positioning the first belt-like member 2 in the width direction are symmetrical with respect to the center line in the transport direction D2. It is arranged to be freely movable. Both guide members 51 and 52 are biased in a direction approaching each other, and guide the first belt-like member 2 between them. The potentiometer 53 detects the movement of both the guide members 51 and 52, and the width (including the ear rubber 2a) of the belt-like member 2 can be measured by calculating with a computer not shown. Then, the AC servo motor 15 is controlled by a computer based on this measurement result, the amount of movement of the conveyor belt 13 is adjusted, and the overlapping width L (FIG. 7) related to the joining is kept constant, thereby preventing the joining failure.

  The operation of the joining apparatus 101 configured as described above will be described. First, the tip of the first belt-like member 2 on the roller conveyor 20 is adsorbed by the suction plate 31 of the drawing device 30 and is drawn on the conveyor belt 13 by a fixed angle at an angle of 30 degrees. Next, the cutter 26 of the cutting device 25 is moved down and moved, and the first belt-like member 2 is cut obliquely along the left edge of the conveyor belt 13 to create a cut sheet.

  During this time, the width of the subsequent first belt-like member 2 drawn next on the roller conveyor 20 is calculated by a computer based on the detection value of the potentiometer 53. Then, the cutter 26 is returned to the original home position, the suction by the suction plate 31 is released, the suction plate 31 is lifted, and the released first belt-like member 2 (cut sheet) is driven by the AC servo motor 15 as a conveyor. The belt 13 is moved and conveyed by a required moving amount. The amount of movement is determined based on the width of the succeeding first belt member 2 calculated by the computer in advance, and the preceding first belt member 2 (cut sheet) is determined by driving and controlling the AC servo motor 15. It is transported with high accuracy by the amount of movement.

  At substantially the same time as the conveyance by the conveyor belt 13, the suction plate 31 of the drawing device 30 moves onto the roller conveyor 20, sucks the tip of the subsequent first belt-like member 2, and draws and places a fixed amount on the conveyor belt 13. To do. At this time, the preceding belt-like member 2 (cutting sheet) is required to move so that the edges of the succeeding belt-like member 2 placed later on the preceding belt-like member 2 (cutting sheet) partially overlap each other. Has only been moved. The amount of movement is such that the front end edge of the subsequent band-like member 2 overlaps the portion of the ear rubber 2a that hits the rear end edge of the preceding belt-like member 2 with respect to the conveying direction of the conveyor belt 13 (see FIG. 7B). The overlapping width L is controlled so as to always have a required constant width.

  Thus, the suction plate 31 is placed so that the side edge portion of the succeeding belt-like member 2 overlaps with the rear edge portion of the preceding belt-like member 2 (cut sheet) with a predetermined constant width L, and the suction plate 31 from above. The second band-shaped member 3 is formed by pressing and bonding the overlapping portions and joining them. Then, the cutter 26 of the cutting device 25 is moved to cut the subsequent belt-like member 2 diagonally along the left side edge of the conveyor belt 13, while the width of the belt-like member 2 drawn next on the roller conveyor 20 is increased. Based on the detection value of the potentiometer 53, it is calculated by a computer.

  The above operations are sequentially repeated to form a new second strip member 3. The second belt-like member 3 forms a so-called bias cord belt-like member in which the cord is embedded obliquely.

In this way, by controlling the amount of movement of the preceding band-shaped member 2 (cut sheet) based on the width of the subsequent band-shaped member 2, the overlapping width L is always required even if the width of the band-shaped member 2 varies. Therefore, no bonding failure occurs. By maintaining the overlap width L at a required constant width, as shown in FIG. 7 (a), the side of the subsequent belt-like member 2 having a constant width L substantially on the ear rubber 2a portion of the preceding belt-like member 2 (cut sheet). When the edges overlap and are crimped and joined, as shown in FIG. 7B, the steel cords 4 embedded in the second band-like member 3 are arranged at substantially predetermined intervals also at the joint. , Quality can be improved.
JP 2000-159399 A

  However, in the above conventional band-shaped member joining method and apparatus, the distance between the guide members 51 and 52 is made to follow the change in the width of the band-shaped member 2 and the distance is measured. In order to do so, the guide members 51 and 52 need to have high mechanical accuracy. Moreover, since the guide members 51 and 52 have a movable part, there exists a possibility that a precision may fall by abrasion.

  The present invention has been made to solve such problems, and its purpose is to cut a belt-like member for a tire containing a steel cord at a predetermined angle with respect to the longitudinal direction at regular intervals. It is to make it possible to use a guide member having a simple structure without a movable portion when cutting sheets are created and edges different from the cut surfaces of the cutting sheets are joined one after another.

The invention according to claim 1 is a conveying device that conveys a belt-like member for a tire having a built-in steel cord, the guide surface facing the side surface of the belt-like member being conveyed, and the side surface of the belt-like member that is the guide surface. And a guide member having a magnet to be attracted to the belt, and an iron plate is attached to the magnet and the side surface of the iron plate is disposed on the guide member so as to face the side surface of the belt-like member. It is a transfer device.
The invention according to claim 2 is a conveying device that conveys a belt-like member for a tire having a built-in steel cord, the guide surface facing the side surface of the belt-like member being conveyed, and the side surface of the belt-like member that is the guide surface. A conveying device provided with a guide member having a magnet to be attracted to the conveyor, a conveyor disposed on the front end side of the conveying device, and a side edge thereof extending in a predetermined oblique direction with respect to the conveying direction of the conveying device; Control means for controlling the amount of movement of the conveyor, and supply means that is arranged on the front end side of the transport device and supplies a predetermined length of a strip member for tire containing a steel cord transported by the transport device onto the conveyor. Means for cutting the belt-shaped member supplied on the conveyor along the side edge of the conveyor to create a cut sheet; and a subsequent cut at the trailing edge of the preceding cut sheet on the conveyor. Joining means for overlapping and joining the front edge portion of the sheet or the side edge portion of the band-like member before cutting, and the control means is on a plane where the rear edge portion of the preceding cutting sheet includes the guide surface It is the joining apparatus of the strip | belt-shaped member for tires which controls the movement amount of the said conveyor so that it may exist .
The invention according to claim 3, in the bonding apparatus of the tire strip according to claim 2, wherein a detecting means for detecting the trailing edge of the cut sheet said previous, the movement amount based on the output of said detection means A joining device for a belt-like member for a tire, characterized in that it comprises means for setting .

(Function)
According to the first aspect of the present invention, the side surface of the belt-like member for tire is attracted in the direction of the iron plate by the magnetic force of the magnet and is conveyed while being in contact with the guide surface.
The invention according to claim 2 is conveyed while the side surface of the belt member for tire is brought into contact with the guide surface by the conveying device , and the trailing edge portion of the preceding cut sheet exists on the plane including the guide surface by the control means. The amount of movement of the conveyor is controlled .
The invention according to claim 3 sets the amount of movement of the conveyor based on the output of the detection means for detecting the rear end portion of the preceding cut sheet .

  According to the present invention, the cut sheet of the belt-shaped member for a tire containing the gosteel cord is sequentially formed, and the length of the overlapping portion of the preceding cut sheet and the subsequent cut sheet (including the band-shaped member before cutting) Can be guided by a guide member having a simple structure with no movable part when joining with a substantially constant adjustment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic plan view of an entire tire belt-shaped member joining apparatus 1 according to an embodiment of the present invention, FIG. 2 is an enlarged view of the vicinity of an intersection between a guide member and a conveyor in FIG. 1, and FIG. It is sectional drawing for demonstrating a structure. In these drawings, the same components as those in FIGS. 4 to 7 are denoted by the reference numerals used in those drawings. Moreover, since the side view of the joining apparatus 1 and the figure seen from the direction of the arrow C of FIG. 1 are the same as that of FIG. 5 and FIG. 6, respectively, it is abbreviate | omitted and those are needed when description of this embodiment is required. Refer to the figure.

  As shown in FIG. 1, the joining apparatus 1 according to the present embodiment includes a belt conveyor 10, which cuts the first belt-like member 2 obliquely to create a cut sheet, and what is the cut surface of the cut sheet? The operation | work which joins different edge parts one after another and forms the 2nd cutting sheet 3 is performed on the belt conveyor 10. FIG.

  Guide members 61 and 62 are arranged on both sides of the conveyance path of the first belt-like member 2. As shown in FIG. 2, magnetic force generating means 63 are arranged at predetermined intervals inside the guide member 62 on the left side of the transport path. As shown in FIG. 3, the guide member 62 is made of a non-magnetic material, and includes a magnet 63 and a metal plate 64 having a thickness of about 1 mm fixed to the lower surface thereof. In addition, there is an opening in the lower part of the guide surface 65 of the guide member 62, and one side surface 64a of the metal plate 64 is disposed in the vicinity of the opening. For this reason, the lines of magnetic force generated by the magnet 63 are exposed outside the guide surface 65 from one side surface 64 a of the metal plate 64. As a result, as shown in FIG. 3A, the left side surface of the first belt-like member 2 placed on the roller 21 faces the side surface 64a of the metal plate 64 and sucks in the direction D3 of the side surface 64a. Then, as shown in FIG. 5B, the sheet is conveyed in contact with the guide surface 65. Here, the reason why the side surface 64a of the thin metal plate 64 is arranged in the vicinity of the opening of the guide surface 65 and the suction surface is thinned up and down is that when the side surface 64a is thickened up and down, the side edge of the belt-like member 2 is bent and the curved surface is curved. It is because it will be adsorbed.

  Further, as shown in FIG. 2, a line where the plane including the guide surface 65 of the guide member 62 and the conveyor belt 13 intersect is defined as a line L1, and the overlapping direction L in FIG. When a line displaced in the opposite direction (right direction in FIG. 2) is L2, and a line corresponding to the left edge in the moving direction of the cutting sheet is L3, an object such as a photoelectric sensor is detected at the intersection P of the lines L2 and L3. Means are provided to detect whether or not the left rear end of the cut sheet exists at the position of the intersection P. Then, the trailing edge of the cut sheet is stopped on the line L2 by controlling the amount of movement of the conveyor belt 13 based on the output of the object detection means.

  Except for the points described above, it has the same configuration as the conventional apparatus. Next, operation | movement of the joining apparatus 1 which has the above structure is demonstrated. First, the front end portion of the first belt-like member 2 disposed on the roller conveyor 20 in a state in which the side surface is in contact with the guide surface 65 of the guide member 62 is adsorbed by the adsorption plate 31 of the drawing device 30 and placed on the conveyor belt 13. A fixed amount is pulled out at an angle of 30 degrees and placed on the conveyor belt 13 that is stopped. Next, the cutter 26 of the cutting device 25 is lowered and moved, and the first belt-like member 2 is cut obliquely along the left edge of the conveyor belt 13 to create a cut sheet.

  Next, the cutter 26 is returned to the original home position, the suction by the suction means 31 is released, the suction plate 31 is raised, and the released first belt-like member 2 (cut sheet) is driven by the AC servo motor 15. The conveyor belt 13 is moved. The movement of the conveyor belt 13 is performed based on the output of the object detection means provided at the intersection P between the lines L2 and L3, and is controlled so that the left rear end of the cut sheet comes to the position of the intersection P.

  At substantially the same time as the conveyance by the conveyor belt 13, the suction plate 31 of the drawing device 30 moves onto the roller conveyor 20, sucks the tip of the subsequent first belt-like member 2, and draws and places a fixed amount on the conveyor belt 13. To do. At this time, since the rear end of the preceding belt-like member 2 (cutting sheet) is arranged on the line L2, the suction of the suction means 31 is canceled for the subsequent belt-like member 2 placed later or the suction means. Since the side edges are arranged on the line L1 simply by lowering 31, the end edges are overlapped with each other by L in FIG. 7. Then, the superposed portion is pressed by the suction plate 31 from above, and the second belt member 3 is formed by bonding, and then the cutter 26 of the cutting device 25 is moved to move the subsequent belt member 2. Cut diagonally along the left edge of the conveyor belt 13.

  The above operations are sequentially repeated to form a new second strip member 3. The second belt-like member 3 forms a so-called bias cord belt-like member in which the cord is embedded obliquely.

  Thus, according to the present embodiment, the cut sheets of the first belt-like member 2 made of a steel cord coated with rubber are sequentially formed, and the preceding cut sheet and the subsequent first belt-like member 2 are superimposed. When joining while adjusting the length of the portion to be substantially constant, the side surface of the first belt-like member is attracted by the magnet built in the guide member, conveyed in contact with the guide surface, and preceding cutting The position where the rear edge of the sheet intersects the plane including the guide surface and the conveyor belt 13 is displaced in the direction opposite to the moving direction of the conveyor belt 13 (right direction in FIG. 2) by a certain overlap amount L. Since the amount of movement of the conveyor belt 13 is controlled so as to match the position of the line L2, even if the width of the first belt-like member 2 varies, the left side surface is adjusted to the guide surface 25, and the overlapping width L is set. It can be maintained at a desired constant value.

  In the above embodiment, after joining the side edge near the front end of the succeeding first belt-like member 2 to the rear edge of the preceding cut sheet, the belt-like member 2 is moved along the left edge of the conveyor belt 13. Although it cut | disconnects diagonally, you may comprise so that cutting may be performed simultaneously with joining or before joining.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view of a whole joining device for tire strip members according to an embodiment of the present invention. It is an enlarged view of the intersection part vicinity of the guide member and conveyor in FIG. It is sectional drawing for demonstrating the structure of the guide member in FIG. It is a general | schematic top view of the whole conventional strip | belt-shaped member joining apparatus. It is a side view of the belt conveyor in FIG. It is the figure seen from the direction of arrow C in FIG. It is a figure which shows the mode of joining of a strip | belt-shaped member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Tire strip | belt-shaped member joining apparatus, 2 ... 1st strip | belt-shaped member, 3 ... 2nd strip | belt-shaped member, 13 ... Conveyor belt, 26 ... Cutter, 30 ... Pull-out device 31 ... Adsorption means, 62 ... Guide member, 63 ... Magnet, 64 ... Iron plate, 65 ... Guide surface.

Claims (3)

A conveying device for conveying a belt-like member for a tire containing a steel cord,
A guide member having a guide surface facing a side surface of the belt-shaped member to be conveyed, and a magnet that attracts the side surface of the belt-shaped member to the guide surface ;
An apparatus for transporting a belt-shaped member for a tire, wherein the steel plate is attached to the magnet and disposed on the guide member so that a side surface of the steel plate faces a side surface of the belt-shaped member. A transport device for transporting a belt-shaped member for a tire containing a steel cord, the guide having a guide surface facing a side surface of the transported belt-shaped member, and a magnet for attracting the side surface of the belt-shaped member to the guide surface. A transport device comprising a member;
A conveyor which is disposed on the front end side of the transport device and whose side edges extend in a predetermined oblique direction with respect to the transport direction of the transport device;
Control means for controlling the amount of movement of the conveyor;
Supply means for supplying a predetermined length of a belt-like member for tire, which is disposed on the front end side of the conveying device and contains a steel cord conveyed by the conveying device, on the conveyor;
Means for cutting a belt-like member supplied on the conveyor along a side edge of the conveyor to create a cut sheet;
A joining means for joining the trailing edge of the preceding cutting sheet on the conveyor by superimposing the leading edge of the succeeding cutting sheet or the side edge of the strip-shaped member before cutting;
The tire belt-like member joining apparatus according to claim 1, wherein the control means controls the amount of movement of the conveyor so that a trailing edge portion of the preceding cutting sheet exists on a plane including the guide surface . In the joining apparatus of the strip | belt-shaped member for tires of Claim 2 ,
An apparatus for joining tire strip members, comprising: detecting means for detecting a trailing edge of the preceding cut sheet; and means for setting the amount of movement based on an output of the detecting means .

Images