JP2014136317A - Attaching method of belt shaped member and device of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method which attaches a belt shaped member cut at a designed length on a rotating body such that the amount of joint becomes nearly constant in a width direction; and a device of the same.SOLUTION: An attaching device of belt shaped members comprises: a step of measuring the positions of the apical portion and the rear end portion of a belt shaped member which is cut at a designed length and is conveyed at a plurality of places in a width direction of the belt shaped member concerned; a step of computing the member length of the belt shaped member for each place in the width direction from the places of the apical position and the rear end portion; a step of stretching for each place in the width direction of the belt shaped member by holding each place in the width direction of the rear end portion of the belt shaped member; and a step of attaching the stretched belt shaped member to the outer periphery of a rotating body. In the step of stretching the belt shaped member, the belt shaped member is made to stretch such that the member length of each place in the width direction of the belt shaped member becomes a pre-determined reference value.

Description

  The present invention relates to, for example, a method and an apparatus for sticking a belt-like member cut into a fixed length such as a tire constituent member to a rotating body such as a molding drum.

  Conventionally, as a method of sticking a belt-shaped tire constituent member cut to a fixed length such as a side tread to a molding drum, the length of the tire constituent member is measured in advance, and the measured length is compared with a reference value. Based on the comparison result, finely adjust the ratio (draw ratio) between the rotational speed of the molding drum and the supply speed of the tire component, and paste it on the molding drum while shrinking or extending the entire tire component to some extent. Thus, there has been proposed a method of matching the length of the pasted tire constituent member with a predetermined length (for example, the length of one round of the forming drum) (for example, Patent Document 1).

Japanese Patent No. 3190051

  However, in the method described in Patent Document 1, although a certain degree of sticking accuracy can be secured, due to problems such as curving and shrinking of the rubber material, meandering of the member before sticking, set slip, etc., the tire constituent member that is stuck only with the draw ratio There was a problem that the length of the could not be corrected. In particular, tire components that have two rubber types in the tire width direction and have individual contours for each tire size, such as side treads, ensure a stable joint amount in the width direction. It was difficult to do.

  The present invention has been made in view of the conventional problems, and provides a method and apparatus for sticking a strip-shaped member cut into a fixed length to a rotating body so that the joint amount is substantially constant in the width direction. For the purpose.

The invention of the present application is a method for attaching a strip-shaped member that is cut into a fixed length and transported to a rotating body, wherein the positions of the leading end portion and the trailing end portion of the strip-shaped member are set to the leading end portion and the trailing end portion of the strip-shaped member. And measuring the length of the band-shaped member from the positions of the front end and the rear end, and measuring the length of the band-shaped member at each position in the width direction of the band-shaped member (at the front end and the rear end). A step of calculating each position), a step of gripping each position in the width direction of the rear end portion of the band-shaped member, and expanding and contracting the band-shaped member in each position in the width direction; A step of affixing the belt-like member to the outer peripheral surface of the rotating body, and in the step of expanding and contracting the belt-like member, the length of each member in the width direction of the belt-like member is set to a preset reference value. The belt-shaped member is expanded and contracted.
In this way, the band-shaped member is extended or compressed at a plurality of positions in the width direction so that the member length of the band-shaped member is constant (reference value) in the width direction. The joint amount can be made substantially constant in the width direction.

The invention of the present application is an apparatus for affixing a strip-shaped member cut and transported to a fixed length to a rotating body, the rotating body for pasting the strip-shaped member, a transport means for transporting the strip-shaped member, and the strip-shaped member Measuring means for measuring the length of the member at a plurality of locations in the width direction of the belt-shaped member; and installed on the rotating body side of the transporting means, the rear end of the belt-shaped member in the width direction of the belt-shaped member Expansion and contraction means that grips each part and expands and contracts the belt-like member for each part in the width direction of the belt-like member, and the extension means has a member length of each part in the width direction of the belt-like member. The belt-shaped member is expanded and contracted while gripping a rear end portion of the belt-shaped portion so as to have a preset reference value.
By adopting such a configuration, the belt-like member can be stretched or compressed at a plurality of locations in the width direction and attached to the rotating body, so the joint amount of the belt-like member can be made substantially constant in the width direction. .

In the invention of the present application, the expansion / contraction means is installed on the rotating body side of the conveying means, a plurality of movable units formed with ventilation holes, a suction means connected to the ventilation holes, and the plurality of movable parts. And a moving means for moving the unit in the length direction of the belt-like member.
As a result, the rear end portion of the belt-shaped member can be easily grasped, and the belt-shaped member can be individually extended or compressed at a plurality of positions in the width direction, so that the joint amount of the belt-shaped member can be reliably increased in the width direction. Can be constant.

  The summary of the invention does not list all necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

It is a figure which shows the sticking apparatus of the strip | belt-shaped member which concerns on embodiment of this invention. It is a figure which shows the structure of a sticking conveyor. It is a figure which shows the structure of an expansion-contraction means. It is a flowchart which shows the sticking method of a strip | belt-shaped member. It is a figure which shows the measuring method of the position of the front-end | tip part and rear-end part of a strip | belt-shaped member. It is a figure which shows the sticking method of a strip | belt-shaped member. It is a figure which shows the expansion-contraction method of a strip | belt-shaped member. It is a figure which shows the crimping | compression-bonding method of a strip-shaped member.

  Hereinafter, the present invention will be described in detail through embodiments, but the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

FIG. 1A is a view showing a configuration of a belt-like member sticking apparatus 10, and FIG. 1B is a plan view of the sticking conveyor 12.
The belt-like member sticking device 10 includes a molding drum 11 as a rotating body, a sticking conveyor 12 as a conveying means, and first and second two-dimensional displacement sensors 13A and 13B as measuring means. The side tread 20 as a belt-shaped member cut into a fixed length conveyed by the above is attached to the outer peripheral surface of the molding drum 11.
Hereinafter, the molding drum 11 side is referred to as the upper side, the sticking conveyor 12 side as the lower side, the left side of the figure, which is the conveying direction of the side tread 20 mounted on the sticking conveyor 12, is referred to as the front side, and the right side of the figure is referred to as the rear side.
The molding drum 11 is an expandable / contractable cylindrical member that is connected to a main shaft of a molding machine (not shown) and rotates, and the side tread 20 is pressed by a pressing roller (not shown) and sequentially pasted to the outer peripheral side surface.
The affixing conveyor 12 includes a pair of rollers 12a and 12b and a conveyor belt 12c spanned between the rollers 12a and 12b. The conveyor rotating unit 14 conveys the side tread 20 in the direction of the forming drum 11, and the front side of the conveyor rotating unit 14 A rear end holding hand 15 as an extending / contracting means and a hand lifting / lowering means 16 are provided.

As shown in FIG. 2, the rear end holding hand 15 includes a plurality of movable units 151 to 155 arranged in parallel with each other in the width direction, a suction unit 17, and a plurality of unit moving units 181 to 185.
As shown in FIGS. 3A and 3B, the movable unit 151 is a block-like member disposed in the frame 150 of the rear end holding hand 15, and each block has one or a plurality of through holes. 15h is formed. The movable units 152 to 155 have the same structure as the movable unit 151.
The suction means 17 includes a suction device 17a, a plurality of air tubes 17b communicating with each of the through holes 15h provided in the movable units 151 to 155, and an electromagnetic valve provided between the air tube 17b and the suction device 17a. 17c, and sucks and holds the rear end portion of the side tread 20 mounted on the rear end holding hand 15 from below.
The unit moving means 181 to 185 include, for example, a rail 18r that holds the movable units 151 to 155 so as to be movable in the front-rear direction, a motor 18M installed on the fixed base 19, and a frame 150 of the rear end holding hand 15 at one end. A ball screw mechanism including a male screw 18p fixed to the rear side and the other end attached to the motor 18M and a female screw 18q fixed to the movable units 151 to 155 can be used.
In addition, as the unit moving means 181 to 185, a moving means provided with a linear actuator may be used similarly to the hand lifting means 16 described later.

As shown in FIG. 1, the hand elevating means 16 is provided on the lower front side of the rear end holding hand 15 and rotates the rear end holding hand 15 around a direction parallel to the width direction of the side tread 20 as a rotation axis. The front side of the rear end holding hand 15 is brought closer to the molding drum 11 side.
In this example, the hand elevating means 16 can be rotated on a rotary shaft 15j that extends the frame 150 of the rear end holding hand 15 in a direction parallel to the width direction of the side tread 20 provided on the rear end side of the frame 150. The rear end holding hand 15 is rotated by holding the front end of the rear end holding hand 15 upward. Specifically, the tip of the telescopic rod 16b of the linear actuator 16a attached to the fixed base 19 is fixed to the front side of the frame 150, and the telescopic rod 16b is extended to lift the front side of the rear end holding hand 15 upward. That's fine.
As the hand lifting / lowering means 16, a ball screw mechanism similar to the unit moving means 181 to 185 may be used.

The two-dimensional displacement sensor 13 </ b> A is disposed above the rear end portion of the conveyor rotating unit 14 and measures the cross-sectional shape of the rear end portion of the side tread 20 over the entire width of the side tread 20.
The two-dimensional displacement sensor 13 </ b> B is disposed in front of the rear end holding hand 15, and is attached to the molding drum 11 and the cross-sectional shape on the front end side of the side tread 20 attached to the molding drum 11 from obliquely below the molding drum 11. The shape of the joint portion of the side tread 20 is measured over the entire width of the side tread 20.
The position of the boundary between the side tread 20 and the conveyor belt 12c when the side tread 20 is conveyed becomes the position of the rear end, and the position of the boundary between the side tread 20 and the molding drum 11 when the side tread 20 starts to be adhered is the front end. It becomes the position.
As the two-dimensional displacement sensors 13A and 13B, for example, a displacement of the object from the position of a laser light source that irradiates a line-shaped laser beam and a light receiving element that includes a CCD camera and receives the laser beam reflected on the surface of the object. A laser displacement meter provided with a displacement amount measuring means for measuring the amount can be used.

Next, a method of sticking the side tread 20 cut to a fixed length using the belt-like member sticking device 10 to the molding drum 11 will be described with reference to the flowchart of FIG.
First, as shown in FIG. 5 (a), the side tread 20 cut to a fixed length is mounted on the conveyor belt 12c of the sticking conveyor 12 (step S10), and the sticking conveyor 12 is operated to mold the side tread 20. While transporting to the drum 11 side, the cross-sectional shape of the rear end portion of the side tread 20 is measured by the two-dimensional displacement sensor 13A (step S11).
Next, as shown in FIG. 5B, the molding drum 11 side of the sticking conveyor 12 is raised so that the front side of the conveyor belt 12 c approaches the molding drum 11 side, and the tip of the side tread 20 is placed on the outer peripheral surface of the molding drum 11. Then, the molding drum 11 is rotated to start the operation of attaching the side tread 20 to the outer peripheral surface of the molding drum 11 (step S12).
Next, the cross-sectional shape of the front end portion of the side tread 20 is measured by the two-dimensional displacement sensor 13B (step S13), and the cross-sectional shape data of the rear end portion measured in step S11 and the front end portion measured in step S13 are measured. From the cross-sectional shape data, the member length of the side tread 20 is calculated at a plurality of locations in the width direction (step S14).
The position in the tire width direction where the member length is calculated is the same as the position in the tire width direction where the movable units 151 to 155 are arranged.

Next, as shown in FIG. 6A, when the side tread 20 is affixed to the molding drum 11 to the vicinity of the rear end, the front side of the affixing conveyor 12 is gently lowered (step S15). At this stage, the rear end portion of the side tread 20 is still in the conveyor rotating portion 14 and has not reached the rear end holding hand 15.
Then, as shown in FIG. 6B, when the rear end of the side tread 20 reaches the rear end holding hand 15, the rotation of the molding drum 11 is stopped and the lowering of the sticking conveyor 12 is stopped ( Step S16). The affixing conveyor 12 ends the descent at a position where the front and rear ends of the side tread 20 do not overlap.
When the sticking conveyor 12 is lowered, the rear end holding hand 15 is caused to follow the side tread 20 by lifting the front side of the rear end holding hand 15 upward by the hand lifting means 16.

Next, the suction device 17a is operated and the electromagnetic valve 17c is opened, and the rear end portion of the side tread 20 is attracted to each of the movable units 151 to 155 (step S17). Thereby, the rear end portion of the side tread 20 can be gripped by the suction means 17 at a plurality of points in the width direction (here, 5 points).
Next, as shown in FIG. 7, each of the movable units 151 to 155 is moved in the transport direction (front-rear direction) according to the member length of the side tread 20 calculated in step S <b> 14, and the side tread 20 is moved in the width direction. For each location (k), the length of the side tread 20 is adjusted by expanding and contracting so that the member length Lk (k = 1 to 5) becomes a preset reference value L0 (step S18). .
Specifically, by rotating the motor 18M of the movable units 151 to 155 and moving the movable units 151 to 155 to which the male screw 18p is attached in the front-rear direction, the side tread 20 is expanded and contracted at a plurality of positions in the width direction. Let
For example, when the member length L1 at the center position P1 of the movable unit 151 is shorter than the reference value L0, the movable unit 151 is moved rearward by the shortage amount ΔL1 = L0−L1, and the side tread 20 is moved in the circumferential direction. The length of the side tread 20 is made equal to the reference value L0 at the position where the position in the width direction of the side tread 20 is the same as the center position P1.
When the member length L1 at the center position P1 of the movable unit 151 is longer than the reference value L0, the movable unit 151 is moved forward by an excess amount ΔL1 = L0−L1 to move the side tread 20 in the circumferential direction. The side length of the side tread 20 is compressed so that the member length L1 where the position in the width direction is the same as the center position P1 becomes the reference value L0.
FIG. 7 is an example in which the movable units 151 and 152 are moved backward and the movable units 154 and 155 are moved forward to adjust the length of the side tread 20.

After adjusting the length of the side tread 20, as shown in FIG. 8A, while holding the rear end portion of the side tread 20 by the movable units 151 to 155, the affixing conveyor 12 is raised, The rear end portion is moved to the position of the front end of the side tread 20 affixed to the molding drum 11, and the front end portion and the rear end portion of the side tread 20 are pressure-bonded (step S19).
The movable units 151 to 155 are configured to press the side tread 20 against the molding drum 11 while following the side tread 20 and returning to the original position.
Further, after the pressure bonding, the electromagnetic valve 17c is closed to stop the suction, and outside air is introduced into the through hole 15h, thereby separating the side tread 20 and the rear end holding hand 15 (step S20).
In this example, in step S18, the member length of each part in the width direction of the side tread 20 is adjusted to the preset reference value L0, so the joint amount of the side tread 20 is made substantially constant in the width direction. be able to. That is, the front end and the rear end of the side tread 20 can be attached with no gap.

  After the side tread 20 is pressure-bonded, as shown in FIG. 8B, the sticking conveyor 12 is lowered and moved away from the molding drum 11, and then the molding drum 11 is rotated, and the two-dimensional displacement sensor 13B uses the molding drum. The shape of the joint part of the side tread 20 affixed to 11 is measured over the full width of the side tread 20 (step S21). The measurement result is fed back as control data for the movement amount of the movable units 151-155.

  As described above, in the present embodiment, the positions of the front end portion and the rear end portion of the side tread 20 cut at a constant length are measured at a plurality of positions in the width direction, and the member length of the side tread 20 is determined in the width direction. It is calculated for each part, and when the side tread 20 is attached to the molding drum 11, the parts in the width direction of the rear end part of the side tread 20 are stretched while being sucked and held by the movable units 151 to 155. Since the rear end portion of the side tread 20 is pasted to the outer peripheral surface of the molding drum 11 after being made to have two rubber types in the tire width direction as in the side tread 20, and for each tire size Even if it is a strip-like member having different contours, a stable joint amount in the width direction can be ensured.

In the above-described embodiment, the belt-shaped member is the side tread 20, but the present invention can also be applied to pasting other belt-shaped members such as a top tread and an inner liner.
Moreover, in the said embodiment, although the side tread 20 was expanded / contracted, adsorb | sucking / gripping at 5 points | pieces of the width direction, the number of points which expand / contract the side tread 20 is not restricted to this, It affixes on the molding drum 11 The side tread 20 is appropriately determined depending on the width, cross-sectional shape, and the like.
Moreover, in the said embodiment, although the front side of the rear end holding hand 15 was brought close to the molding drum 11 direction and the side tread 20 was pressure-bonded to the outer peripheral surface of the molding drum, the movable units 151 to 155 were respectively rotated. It is good also as a structure which approaches the molding drum 11 direction.

  Moreover, in the said embodiment, although the cross-sectional shape of the front end side of the side tread 20 and the shape of the joint part of the side tread 20 affixed on the molding drum 11 were measured by the two-dimensional displacement sensor 13B, the conveyor rotating part The third two-dimensional displacement sensor is arranged above the front end portion of 14 and the cross-sectional shape of the front end portion of the side tread 20 is measured. In the two-dimensional displacement sensor 13B, only the joint portion of the side tread 20 is measured. It may be.

  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. It will be apparent to those skilled in the art that various modifications or improvements can be added to the embodiment. It is apparent from the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  According to the present invention, the joint amount of the belt-like member attached to the rotating body can be reliably made constant in the width direction. Therefore, if the present invention is applied to, for example, a tire molding process, a stable green tire can be molded, and variations in tire performance can be reduced.

DESCRIPTION OF SYMBOLS 10 Sticking device of strip | belt-shaped member, 11 molding drum, 12 sticking conveyor
12a, 12b roller, 12c conveyor belt,
13A, 13B Two-dimensional displacement sensor, 14 Conveyor rotating part, 15 Rear end holding hand, 15h Through hole, 150 Rear end holding hand frame, 151-155 Movable unit,
16 hand lifting means, 17 suction means, 17a suction device, 17b air tube,
17c solenoid valve, 181 to 185 unit moving means, 19 fixing base,
20 Side tread.

Claims (3)

It is a method of sticking a strip-shaped member that is cut and transported to a fixed length to a rotating body,
Measuring the positions of the front end portion and the rear end portion of the belt-shaped member at a plurality of locations in the width direction of the front end portion and the rear end portion of the belt-shaped member; and
Calculating the member length of the band-shaped member from the positions of the front end part and the rear end part for each location in the width direction of the band-shaped member;
Gripping each location in the width direction of the rear end portion of the belt-shaped member and expanding and contracting the belt-shaped member for each location in the width direction; and
A step of pasting the stretched strip member on the outer peripheral surface of the rotating body,
In the step of expanding and contracting the band-shaped member, the band-shaped member pasting method is characterized in that the band-shaped member is expanded and contracted so that the length of each part in the width direction of the band-shaped member becomes a preset reference value. . It is a device that pastes a strip-shaped member that is cut and transported to a fixed length to a rotating body,
A rotating body to which the belt-like member is attached;
Conveying means for conveying the belt-shaped member;
Measuring means for measuring the member length of the strip member at a plurality of locations in the width direction of the strip member;
It is installed on the rotating body side of the conveying means, and grips the rear end portion of the band-shaped member at each position in the width direction of the band-shaped member, and holds the band-shaped member at each position in the width direction of the band-shaped member. With expansion and contraction means to expand and contract,
The expansion / contraction means expands / contracts the belt-shaped member while gripping the rear end portion of the belt-shaped portion so that the member length of each portion in the width direction of the belt-shaped member becomes a preset reference value. A band-like member sticking device. The expansion / contraction means is
A plurality of movable units provided with ventilation holes, which are installed on the rotating body side of the conveying means, and suction means connected to the ventilation holes;
The belt-shaped member sticking apparatus according to claim 2, further comprising a moving unit that moves the plurality of movable units in a length direction of the belt-shaped member.

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