JP2010260178A - Tire molding apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire molding apparatus and method in which the center position of a tire constituting belt member and the center position of a molding drum are aligned. <P>SOLUTION: This invention relates to the tire molding apparatus in which a tire constituting belt member is wrapped around from a direction crossing the rotary shaft of the molding drum for molding. The apparatus includes: a position measuring means which measures the position of both edges of the belt member before it is wrapped around the molding drum; an arithmetic means which computes the center position in the width direction of the belt member from the position of both edges measured by the position measuring means; a deviation detecting means which detects deviation between the center position of the belt member computed by the arithmetic means and the center position of the molding drum in the extension direction of the rotary shaft; a moving means for moving a relative position in the extension direction of the rotary shaft between the molding drum and the belt member so that the deviation detected by the deviation detecting means becomes zero; and a control means for controlling the movement of the moving means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tire molding apparatus and a method for molding a molding drum in accordance with a position where a belt-like member as a constituent member of a tire is wound.

Conventionally, in a tire molding process, for example, a belt-shaped member, such as a carcass, a belt, a tread, a bead, or the like, which is a belt-shaped member formed to have substantially the same width as a tire, is wound around a molding drum in multiple layers. Attached and molded as a raw tire.
For example, after a carcass is wound around a molding drum, a belt is wound, and a tread is further wound and stacked to be molded. These tire components are overlapped by winding them so as to coincide with the center of the molding drum in the width direction. As a result, the center of the width direction of each strip | belt-shaped member each overlaps, and it shape | molds as a raw tire.
In order to make the center in the direction of the rotation axis of the molding drum extend and the center in the width direction around which each belt-like member is wound, conventionally, a guide for adjusting the center position of each belt-like member to the center position of the molding drum is provided in the transport device. It was done.
Patent Document 1 discloses an apparatus that performs alignment of the center position in winding of the band-shaped member.

JP-A-4-147835

However, if a guide is provided in the transport device that matches the center position of the extending direction of the rotation axis of the molding drum and the center position of each belt-like member, there is a distance from the guide of the transport device to the position where the winding of the molding drum is started. For this reason, the belt-shaped member made of rubber is bent, and there is a possibility that a deviation occurs between the center position of the molding drum and the center position of the belt-shaped member. For this reason, in the overlap between the layers of each belt-shaped member, a shift occurs in the center position between the belt-shaped members, and the left-right symmetry is lost when the tire is molded.
Further, when performing a winding sampling inspection after a series of windings is completed, there is a problem that the tire after the actual winding has to be cut and the cross section must be visually inspected.

  In order to solve the above problems, the present invention provides a tire molding apparatus and method for aligning the center position of a belt-shaped member constituting a tire and the center position of a molding drum.

As a first embodiment of the present invention, a tire molding apparatus for winding and molding a belt-shaped member constituting a tire from a direction intersecting the rotation axis of the molding drum, the belt-shaped member before being wound around the molding drum A position measuring means for measuring the positions of both edges, a calculating means for calculating the center position in the width direction of the belt-like member from the positions of both edges measured by the position measuring means, and a belt-like member calculated by the calculating means Deviation detection means for detecting the deviation amount between the center position and the center position of the molding drum in the direction of extension of the rotation axis, and the rotation axis extension of the molding drum and the belt-like member so that the deviation amount detected by the deviation detection means becomes zero A moving means for moving the relative position in the direction and a control means for controlling the movement of the moving means are provided.
According to the present invention, the tire molding apparatus measures the position of both edge portions of the belt-shaped member before being wound around the molding drum, and the belt-shaped member from the positions of both edge portions measured by the position measurement device. Calculating means for calculating the center position in the width direction, a deviation detecting means for detecting a deviation amount between the center position of the belt-like member calculated by the calculating means and the center position in the direction of extension of the rotation axis of the molding drum, and deviation detecting means Winding means comprising: moving means for moving the relative position of the molding drum and the belt-like member in the direction of extension of the rotation axis so that the amount of deviation detected by the step becomes zero; and control means for controlling the movement of the moving means. Since it is possible to move the molding drum by detecting the amount of previous displacement, the center position in the width direction of the belt-shaped member and the direction in which the rotation axis of the molding drum extends can be affected without being affected by the bending of the belt-shaped member made of rubber. Position can be matched.

As a second aspect of the present invention, the position measuring means is constituted by a camera that detects an image.
According to the present invention, since the position measuring unit includes a camera having an image sensor, the positions of both edge portions of the belt-shaped member can be measured based on the captured image. Furthermore, if this part and the other edge part are used at the same time from the range of the captured image, the amount of deviation between the belt-like member and the molding drum can be predicted. It can be performed.

As a third aspect of the present invention, the tire molding apparatus is configured to continuously control the relative position between the molding drum and the belt-like member from the start to the end of winding in which the belt-like member is wound around the molding drum.
According to the present invention, the tire molding device continuously controls the relative position between the molding drum and the belt-shaped member from the start to the end of winding of the belt-shaped member wound around the molding drum, so that the belt-shaped member is It is automatically wound with almost no deviation from the center position.

As a fourth aspect of the present invention, the transport means for transporting the belt-shaped member is configured to move in a direction perpendicular to the transport direction of the belt-shaped member.
According to the present invention, the transport means for transporting the belt-shaped member moves in a direction perpendicular to the transport direction of the belt-shaped member, thereby moving the belt-shaped member with respect to the center position of the molding drum, The deviation can be made zero.

As a fifth aspect of the present invention, the molding drum is rotated and moved so as to be inclined with respect to the conveying direction of the belt-shaped member.
According to the present invention, the center of the belt-shaped member in the width direction is inclined with respect to the extending direction of the rotation axis of the molding drum and conveyed by rotating the molding drum so as to be inclined with respect to the conveyance direction of the belt-shaped member. When it is done, the molding drum is rotated so that the center position of the molding drum is parallel to the center of the belt-shaped member so that the deviation between the center position of the molding drum and the center position of the belt-shaped member is zero. Can do.

As a sixth aspect of the present invention, there is provided a tire molding method in which a belt-shaped member constituting a tire is wound from a direction intersecting with the rotation axis of the molding drum and molded, and the belt-shaped member before being wound around the molding drum A position measuring step for measuring the positions of the two edge portions, a calculation step for calculating the center position in the width direction of the belt-like member from the positions of the two edge portions measured by the position measuring step, and a belt-like member calculated by the calculating step A deviation detecting step for detecting a deviation amount between the center position of the molding drum and the center position of the molding drum in the extending direction of the rotation axis, and a rotation axis between the molding drum and the belt-like member so that the deviation amount detected by the deviation detection step becomes zero And a control step for controlling the movement of the moving means for moving the relative position in the extending direction.
According to the present invention, the position measuring step for measuring the positions of both edges of the belt-like member before being wound around the molding drum, and the center in the width direction of the belt-like member from the positions of both edges measured by the position measuring step A calculation step for calculating the position, a shift detection step for detecting a shift amount between the center position of the belt-like member calculated by the calculation step and the center position in the rotation axis extending direction of the molding drum, and the shift detected by the shift detection step The amount of deviation before winding is detected by molding with a control step that controls the movement of the moving means for moving the relative position of the forming drum and the belt-like member in the direction of extension of the rotation axis so that the amount becomes zero. Since the molding drum can be moved, the center position in the width direction of the strip member and the rotation axis direction of the molding drum are not affected by the bending of the strip member made of rubber. It is possible to match the heart position.

The tire molding apparatus schematic which concerns on embodiment. The tire molding apparatus side view which concerns on embodiment. The measurement conceptual diagram of the position measurement means which concerns on embodiment. The block diagram of the computer of the tire molding apparatus which concerns on embodiment. The flowchart of the process part of the tire shaping | molding apparatus which concerns on embodiment. The correction | amendment figure of the deviation | shift amount by the moving means which concerns on embodiment. The figure which shows the other form of the moving means which concerns on embodiment. The figure which shows the other form of the moving means which concerns on embodiment.

FIG. 1 shows a tire molding apparatus 50 of the present invention, and FIG. 2 shows a side view of FIG.
In FIG. 1, the tire molding device 50 is disposed at the conveyance end of the conveyance line in the longitudinal direction of the conveyance means 9 that conveys the belt-shaped member 10, and the conveyance direction A of the belt-shaped member 10 is the rotation of the molding drum 51 of the tire molding device 50. It is installed so as to be orthogonal to the extending direction D of the shaft 52.
The tire molding apparatus 50 according to the present invention moves the molding drum 51 in a direction orthogonal to the conveying direction A of the belt-shaped member 10, that is, in the extending direction of the rotating shaft 52 of the molding drum 51, and the width direction of the belt-shaped member 10. Automatic control is performed so that the amount of deviation from the center position C1 of the molding drum 51 with respect to the center position C2 in the extending direction D of the rotating shaft 52 becomes zero. Hereinafter, each of these configurations will be described.

The belt-like member 10 forms a cylindrical raw tire by winding a carcass, a belt, a tread, a bead and the like having a predetermined width and a predetermined length around the molding drum 51 in multiple layers.
A tire molding apparatus 50 that performs winding molding of the belt-like member 10 is roughly configured by a drum base 56, a molding drum 51, support legs 55, and a drum rotation mechanism 60.
The drum base 56 is a pedestal having a mounting surface formed in a flat shape and having a surface covered with metal, such as a surface plate. The mounting surface of the drum base 56 is provided with a configuration for performing substantial molding such as the molding drum 51 and the drum rotation mechanism 60.
The two support legs 55 and 55 are erected in the vertical direction with respect to the mounting surface of the drum base 56 so as to face each other. The lower end 55 a of the support legs 55, 55 is fixed to the mounting surface, and the upper end 55 b side includes a mechanism that supports the rotating shaft 52 of the molding drum 51.
The molding drum 51 includes a rotation shaft 52 positioned between the support legs 55 and 55. The rotary shaft 52 is supported by one support leg 55 so that one end 52 a of the rotary shaft 52 is supported, and the other support leg 55 is supported so that the other end 52 b of the rotary shaft 52 protrudes from the support leg 55. A drum pulley 54 is attached to the other end 52 b protruding from the other support leg 55.

The drum rotation mechanism 60 is generally composed of a rotation motor 61, a motor pulley 62, and a belt 63.
The rotation motor 61 is fixed so that the output shaft 61 a is parallel to the rotation shaft 52 of the molding drum 51. Further, a motor pulley 62 is attached to the output shaft 61a, and the drum pulley 54 and the motor pulley 62 are fixed to the drum base 56 so as to be in a straight line.
A belt 63 is stretched around the drum pulley 54 and the motor pulley 62.
With the above configuration, the belt-shaped member 10 is wound by the rotation of the rotary motor 61 and the rotation of the molding drum 51 via the belt 63. The rotation of the rotary motor 61 is controlled by a control device (not shown).

The tire molding apparatus 50 includes a moving unit 30, a position measuring unit 20, a calculating unit 6, a deviation detecting unit 7, and a control unit 8.
First, the moving means 30 will be described.
The moving means 30 is generally constituted by a linear guide 31 and a drive motor 34.
A plurality of, for example, two linear guides 31 are laid in parallel to the conveying direction A in which the belt-like member 10 is conveyed, that is, in the extending direction D of the rotating shaft 52, for example, two on the floor surface of the factory. The linear guide 31 includes a linear rail 32 and a slider 33. Two sliders 33 are provided for one linear rail 32. These sliders 33 are arranged to support the four corners of the drum base 56, and the drum base 56 is fixed.
That is, when the drum base 56 is fixed to the linear guide 31 and the slider 33 slides on the linear rail 32, the molding drum 51 can move in parallel to the width direction K of the belt-shaped member 10, that is, the extension direction D of the rotating shaft 52. .

A drive mechanism for driving the slider 33 of the linear guide 31 includes a ball screw mechanism, a drive motor 34, and a motor controller 35 (not shown).
The ball screw mechanism (not shown) is configured by a combination of a ball nut and a ball screw, and the ball nut is fixed to at least one of the sliders 33, and the ball screw and the drive motor 34 are coupled.
The motor controller 35 is connected to the drive motor 34 and the control means 8 described later, and controls the rotation by outputting a rotation signal 35 a to the drive motor 34 in accordance with a signal output from the control means 8.
The driving method of the slider 33 is a ball screw mechanism. However, for example, a hydraulic device or a pneumatic device may be used as the driving method.

Next, the position measuring means 20 is constituted by two CCD cameras 21 and 22, for example.
The two CCD cameras 21 and 22 are fixed to the support columns 26 and 26 extending upward from the upper portions of the opposing support legs 55 and 55, and the frame 27 spanned on the upper end side of the support columns 26 and 26. Is done. The frame 27 is fixed so as to be parallel to the rotation shaft 52 of the molding drum 51.
As shown in FIG. 2, the CCD cameras 21 and 22 are attached to the frame 27 so as to be positioned approximately in front of the winding start position 51 a of the uppermost surface portion of the molding drum 51 in which the belt-like member 10 can rotate.
One CCD camera 21 images one edge 11 of the belt-like member 10, and the other CCD camera 22 is attached to the frame 27 at a predetermined interval so as to image the other edge 12.
As described above, the center position C1 of the belt-like member 10 conveyed by the CCD cameras 21 and 22 being arranged can be measured.
Note that the number of CCD cameras is not limited to two, and one camera that detects both the edge 11 and the edge 12 may be used as long as it is a narrow belt-shaped member. Furthermore, although the camera is a CCD camera, any type of camera may be used as long as it can convert the captured image into digital data.

The calculation means 6, the deviation detection means 7 and the control means 8 are composed of a computer 100, to which the CCD cameras 21 and 22 are connected.
As shown in FIG. 3, the calculating means 6 processes the images captured by the CCD cameras 21 and 22 and extends the line segment and the band indicated by the alternate long and short dash line in the width direction of the band-shaped member 10 before the winding start position 51a. The positions of the intersections U1 and U2 with the edges 11 and 12 of the member 10 are calculated, and the center position C1 of the belt-like member 10 is calculated from the positions of the edges 11 and 12.
For example, as an image analysis method, the edges 11 and 12 are detected from the captured image by edge processing or the like, and the distance between the detected positions of the edges 11 and 12 and the image center of the captured image range is determined. The center position C1 can be calculated by obtaining. In addition, the detection method of the edge parts 11 and 12 is not restricted above.

  The deviation detection means 7 detects the deviation δ in the width direction between the center position C2 of the molding drum 51 and the center position C1 of the band-like member 10 based on the information of the center position C1 of the band-like member 10 calculated by the calculation means 6. .

The control means 8 outputs a signal for correcting the deviation amount δ to the moving means 30 based on the deviation amount δ detected by the deviation detection means 7 to the motor controller 35.
As shown in FIG. 3, when the band-like member 10 is transported in the longitudinal direction while being shifted rightward by a shift amount δ with respect to the molding drum 51 as viewed from the molding drum 51 side, the shift amount δ is set to zero. Thus, the molding drum 51 is moved rightward so that the center position C1 of the belt-like member 10 and the center position C2 of the molding drum 51 always coincide with each other. The molding drum 51 is controlled so as to be wound around.

FIG. 4 is a block diagram of the computer 100 that performs positioning of winding.
Hereinafter, the control means for performing alignment will be described with reference to FIG. This will be described with reference to FIGS. 1 to 3 as appropriate.
The computer 100 includes an input unit 101, a storage unit 102 as a storage unit, a processing unit 104 as a processing unit, and an output unit 110.

  For example, a keyboard (not shown) as an input unit and CCD cameras 21 and 22 are connected to the input unit 101.

The storage unit 102 stores the center position C2 of the molding drum 51.
For example, as shown in FIG. 3, a marker line is drawn on the surface at the center position C2 of the molding drum 51 in advance, and this line (center position C2) is imaged by the CCD cameras 21 and 22, thereby forming the molding. The center position C2 of the drum 51 and the positions of the CCD cameras 21 and 22 may be calibrated and the center position C2 may be stored in the storage unit 102.

The processing unit 104 corresponds to the calculation unit 6, the deviation detection unit 7, and the control unit 8.
As shown in FIG. 3, the processing unit 104 including the calculation unit 6 processes the images captured by the CCD cameras 21 and 22 to detect the positions of the edge portions 11 and 12 of the belt-like member 10 at the winding start position 51a. Then, the center position C1 of the belt-like member 10 is calculated from the calculated positions of the edge portions 11 and 12.
Further, the processing unit 104 serving as the deviation detection unit 7 detects a deviation between the center position C2 and the center position C1 stored in the storage unit 102, and the output unit 110 outputs a correction signal 100a for the control unit 8 to correct the deviation amount δ. Output to.
The processing unit 104 will be described in detail below.

  The output unit 110 outputs a correction signal 100a for matching the center position C1 and the center position C2 to the motor controller 35 based on the shift amount δ obtained by the processing unit 104.

FIG. 5 is a flowchart showing the processing of the processing unit 104 that performs the alignment control of the present invention having the above-described configuration.
As shown in FIG. 5, images captured by the CCD cameras 21 and 22 are input to the processing unit 104 that performs alignment control via the input unit 101.
First, in step S1, both edges 11 and 12 of the belt-like member 10 are detected based on the image, and the center position C1 is calculated from the detected positions of both edges 11 and 12.

  Next, in step S2, the center position C2 of the molding drum 51 is read from the storage unit 102, and the presence or absence of deviation from the center position C1 calculated in step S1 is detected. If there is a deviation, the process proceeds to step S3. If there is no deviation, the process returns to step S1.

  In step S3, if there is a deviation, a deviation amount δ is calculated and the deviation amount δ is output to the motor controller 35 as a correction signal 100a.

  In step S4, the motor controller 35 converts the rotation signal 35a into a rotation signal 35a based on the correction signal 100a indicating the deviation δ, and rotates the drive motor 34 so that the center position C1 and the center position C2 coincide with each other. For example, control is performed so that the shift amount δ is zero by moving in the arrow direction E in FIG. 3, and the process returns to step S1.

That is, by repeating Step S1 to Step S4 from before the winding start to the end, the center position C1 of the belt-like member 10 and the center position C2 of the molding drum 51 are controlled to always coincide.
Therefore, for example, as shown in FIG. 3, when the belt-like member 10 is conveyed with a deviation amount δ in the right direction when viewed from the molding drum 51 side with respect to the conveyance direction, the molding drum 51 is shifted in the right direction by the deviation amount δ. Since it is moved, the center position C1 of the belt-like member 10 and the center position C2 of the molding drum 51 can be matched.
Further, as shown in FIG. 6, when the belt-like member 10 is conveyed with its rear portion slightly inclined leftward with respect to the longitudinal conveying direction, it moves in the direction of arrow E in the figure as the first correction of winding. Thereafter, since the molding drum 51 is gradually moved in the left direction (in the direction of arrow F in the figure), the slant θ in the left direction can be repaired together with the bending generated in the width direction of the belt-like member 10.

Further, as another form of the moving means 30, as shown in FIG. 7, when the belt-like member 10 is transported so that the center position C1 of the belt-like member 10 is shifted by the angle θ with respect to the transport direction A, In addition to the movement of the rotating shaft 52 in the extending direction, the molding drum 51 further supports the drum base 56 with a rotating mechanism 36 so that it can be rotated independently. The angle of the rotating shaft 52 may be changed so as to coincide with the deviation of the angle θ by rotating in the direction in which the winding angle is changed.
Although the present embodiment has been described on the assumption that the molding drum 51 is moved, the conveying means 9 may move with respect to the molding drum 51.

  Further, for example, as shown in FIG. 8, the moving means 30 is not provided in the tire molding apparatus 50, but the moving means 30 is provided in the conveying means 9 so that the center position C2 of the belt-like member 10 and the molding drum 51 is matched. Anyway. That is, the leg 19 of the transport unit 9 may be provided on the linear guide 31 or the like, for example, so that the transport unit 9 can move in a direction perpendicular to the transport direction A of the strip member 10. Even if comprised in this way, the center position of the molding drum 51 and the strip | belt-shaped member 10 can be made to correspond.

  In the above description, the belt-like member 10 is a member having a predetermined width and a predetermined length. However, according to the present invention, the center position in the width direction is calculated using both edges of the conveyed member. Therefore, it can be used even if the width is not constant. In addition, it is possible to perform highly accurate control by combining the plurality of forms of moving means 30 shown in the above embodiment.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiment.

6 calculation means, 7 deviation detection means, 8 control means, 9 transport means, 10 strip-shaped member,
11, 12 edge, 20 position measuring means, 21, 22 CCD camera,
30 moving means, 31 linear guide, 32 linear rail, 33 slider,
34 drive motor, 35 motor controller, 50 tire molding device,
51 molding drums, 52 rotating shafts, 56 drum bases, 100 computers,
C1 center position, C2 center position.

Claims (6)

A tire molding apparatus for winding and molding a belt-shaped member constituting a tire from a direction intersecting a rotation axis of a molding drum,
Position measuring means for measuring the positions of both edges of the belt-like member before being wound around the molding drum;
Calculating means for calculating a center position in the width direction of the belt-shaped member from the positions of the both edges measured by the position measuring means;
A deviation detecting means for detecting a deviation amount between the center position of the belt-like member calculated by the calculating means and the center position of the molding drum in the rotation axis extending direction;
Moving means for moving the relative position of the molding drum and the belt-like member in the direction of extension of the rotary shaft so that the deviation amount detected by the deviation detection means becomes zero;
A tire molding apparatus comprising control means for controlling movement of the moving means.   The tire molding apparatus according to claim 1, wherein the position measuring unit includes a camera that detects an image.   The tire molding apparatus controls the relative position between the molding drum and the belt-like member continuously from the start to the end of winding of the belt-like member wound around the molding drum. Item 3. A tire molding apparatus according to Item 2.   The tire molding apparatus according to claim 1, wherein a transport unit that transports the belt-shaped member moves in a direction perpendicular to the transport direction of the belt-shaped member.   5. The tire molding apparatus according to claim 1, wherein the molding drum is rotated and moved so as to be inclined with respect to a conveying direction of the belt-shaped member. A tire molding method in which a belt-shaped member constituting a tire is wound and molded from a direction intersecting the rotation axis of a molding drum,
A position measuring step for measuring positions of both edges of the belt-like member before being wound around the molding drum;
A calculation step of calculating a center position in the width direction of the belt-shaped member from the positions of the two edge portions measured by the position measurement step;
A deviation detecting step for detecting a deviation amount between the center position of the belt-like member calculated by the calculating step and the center position of the molding drum in the extending direction of the rotation axis;
The molding is performed by the control step for controlling the movement of the moving means for moving the relative position of the molding drum and the belt-like member in the direction of extension of the rotary shaft so that the deviation amount detected by the deviation detection step becomes zero. A characteristic tire molding method.

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