JPH0465773B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and device for joining tire constituent materials such as side treads and carcass, and more specifically relates to a method for joining tire constituent materials such as a side tread and a carcass, and more specifically relates to a method for joining tire constituent materials such as a side tread and a carcass, and more specifically, to The present invention relates to a method and apparatus for joining tire constituent materials, in which the tire constituent materials are cut into lengths, and in particular, the end portions in the width direction of the tire constituent materials are joined in a precisely positioned state.

[Prior art]

Traditionally, in the tire manufacturing process, a strip of tire constituent material is wrapped around a tire forming drum.
For example, Japanese Patent Laid-Open No. 59-207227 and Japanese Patent Laid-Open No. 60-79938 are known as methods for automatically joining the end portions of the front end and rear end to each other.

That is, as disclosed in Japanese Patent Application Laid-Open No. 59-207227, the conventional method of wrapping a band member around a tire-forming drum is difficult when the thickness of the band member is not uniform in the width direction or when there are some When made of different rubber materials, a phenomenon may occur in which both sides of the band member in the width direction, called short sides, become shorter in the longitudinal direction than the central portion. When a band member with such short sides is wrapped around a tire forming drum and its front and rear ends are joined, the side edges in the width direction are shorter than the center, so the side edges in the width direction The joint part of the joint is slightly open and becomes depressed. In the subsequent vulcanization process, the mold release agent applied to improve the mold release property may accumulate in the depressions, and if the tire is vulcanized as is, the tire performance may deteriorate. There is.

Therefore, conventionally, either before attaching the leading end of the strip member to the tire building drum or before attaching the rear end of the strip member to the tire building drum, a holding means that holds the end portion is driven to hold the strip member. After stretching at least one side, it was applied to the tire building drum.

Furthermore, in the invention disclosed in JP-A No. 59-207227, a position detecting means for detecting the position of the end portion of the rubber-like member is provided, and the rubber-like member is held by the side holding mechanism. The leading end and the trailing end are joined together.

However, in such conventional methods and devices, the amount of tension to be applied to the rear end of the strip is determined based on preset data. Due to errors and the type of rubber material, the initially set data may not always be the same, and the position detection means simply detects the position of the center part of the rubber-like member and joins it, so the belt-like shape with short sides may not be accurate. It has been difficult to accurately and reliably attach both sides of the member in the width direction.

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to wrap a tire constituent material, particularly a band-shaped rubber material with low rigidity, around a tire constituent material in the tire forming process. When joining the leading edge and trailing edge, the position of the leading edge and trailing edge of the tire component can always be determined without relying on human hands, and even if short sides occur on both widthwise edges of the tire component. A method and device for joining tire constituent materials, which enables accurate joining without opening of the joining part by automatically understanding the above-mentioned conditions, and manufacturing a tire with high precision. It provides:

[Structure of the invention]

In order to achieve the above object, the present invention includes a step of feeding the tire constituent material to a predetermined position on the tire building drum while holding the leading edge of the tire constituent material by a material feeding device, and a step of feeding the tire constituent material to a predetermined position on the tire building drum by a pressing device. The pasting process and
After releasing the tire constituent material held by the material feeding device, there is a step of wrapping the tire constituent material around a tire forming drum, and cutting the tire constituent material into a predetermined length while the rear end side of the tire constituent material is held by the pressing device. and a step of detecting the rear end of the cut tire constituent material with a detection device and joining it to the leading end of the tire constituent material wrapped around the tire forming drum by a splicing device. In the material joining method, after cutting the tire constituent material with a cutting device,
The width direction is held by a splicing device equipped with a plurality of step detection devices arranged at both ends of the tire constituent material in the width direction and between them, and the tire forming drum is rotated to the splice position of the tire constituent material, The splicing device and the level difference detection device are moved in synchronization to join the tire constituent materials at the splice position, and both ends of the tire constituent material in the width direction are pulled to the position where the level difference is detected by the level difference detection device. The gist is to join the end portions of the constituent materials.

The present invention also provides a material feeding device for supplying tire constituent material to a predetermined position of a tire building drum, a pressing device for pasting a leading end of the tire constituent material onto the tire building drum, and a pressing device for applying a rear end side of the tire constituent material to the tire building drum. a cutting device that cuts the tire component material to a predetermined length while being held by the tire; a detection device that detects the leading and trailing ends of the cut tire component material; and the leading end of the tire component material wrapped around the tire forming drum. A splicing device for joining tire constituent materials to a rear end of the tire constituent material, wherein the splicing device is connected to a rear end of the tire constituent material; A plurality of sprite devices are arranged at both widthwise ends of the tire constituent material at a predetermined interval therebetween, and each splice device is provided with a tire structure. The gist is that a step detection device for detecting a step portion of the material is provided.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the accompanying drawings.

Figure 1 shows tire constituent material W in which this invention is implemented.
FIG. 2 shows a front view of FIG. 1, and this joining device is a tire forming drum 100
a material feeding device 10 that supplies the tire constituent material W to a predetermined position, a pressing device 20 that sticks the leading end of the tire constituent material W onto the tire forming drum 100, and a rear end side W2 of the tire constituent material W to the pressing device 20. It is equipped with a cutting device 30 that cuts the tire component material W into a predetermined length while being held by the tire, and a step detection device 40 that detects the leading end W1 and the trailing end W2 of the cut tire constituent material W. It is comprised of a splicing device 50 that joins a rear end W2 of the tire constituent material W to a leading end W1 of the tire constituent material W attached thereto.

Further, a plurality of splicing devices 50 are disposed at both ends of the tire constituent material W in the width direction and at a predetermined interval therebetween, and a holder for holding the rear end W2 side of the tire constituent material W. means 60;
A pressure bonding means 70 for pressure-bonding the rear end W2 side of the tire constituent material W to the leading end W1, and the step detection device 40 for detecting a step portion of the tire constituent material W are provided.

Next, the configuration of each of the above-mentioned devices will be explained in more detail. First, the material feeding device 1 supplies the tire constituent material W to a predetermined position of the tire forming drum 100.
0 is installed near the side of the tire building drum 100, and the material feeding device 10 has a material feeding plate 11 that moves horizontally in the direction of the upper surface of the tire building drum 100, and a material feeding device 10 that moves this material feeding plate 11 in the horizontal direction. A feeding cylinder 12 and a material pressing plate 13 provided on the material feeding plate 11
It is composed of.

The material delivery plate 11 moves horizontally on the frame 14, and the delivery cylinder 12 is attached to the lower part of the frame 14, and its rod 14a is attached to the bottom of the material delivery plate 11 on the tip W1 side via a bracket 16. Fixed.

Further, the material pressing plate 13 provided on the material feeding plate 11 is formed in a stepped shape so that its tip 13a can clamp the tip of the tire constituent material W between it and the material feeding plate 11. The rear end 13b of the plate 13 is connected to the rod 17 of the material holding cylinder 17 installed on the frame 14.
It is fixed at a.

Therefore, by operating the material holding cylinder 17 in the vertical direction, the tire constituent material W can be held between the material feeding plate 11 and the tip 13a of the material holding plate 13, and released.

Next, the pressing device 20 that sticks the tip of the tire forming material W onto the tire forming drum 100 includes a pressing roller 21 that presses the tire forming material W against the drum surface 100a of the tire forming drum 100;
A swinging mechanism 22 that swings this roller 21 in the vertical direction, and this swinging mechanism 22 includes a swinging arm that is pivotally supported on the frame 14 via a support member 23 so as to be able to swing freely in the vertical direction. 24, and a pressing cylinder 26 that swings this swinging arm 24 via a link 25.
The roller 21 is rotatably supported at the tip.

Next, a cutting device 30 for cutting the rear end side W2 of the tire constituent material W into a predetermined length while being held by the pressing device 20 is installed on the upper part of the front end side of the material pressing plate 13, and the tire constituent material W
A cutter 31 for cutting at a predetermined position is supported by a cutter feeding device 33 via a cutter holder 32. This cutter feeding device 33 includes a guide member 34 that moves the cutter 31 in the width direction of the tire constituent material W, and a drive motor 3 that rotationally drives a screw shaft 35 into which the guide member 34 is screwed.
5, and the drive motor 35 and screw shaft 35 are configured to transmit rotational driving force through a transmission mechanism 36 such as a sprocket and a chain.

Next, a plurality of splice devices 50 are arranged in the width direction of the tire constituent material W. Each splice device 50 is arranged along guide rails 51 arranged on both sides of the supply path of the rubber sheet material W. A support member 53 is placed between the slide members 52 that slide together.
are arranged at predetermined intervals. The entirety of each splicing device 50 is placed on the cutting device 30.
It is reciprocated horizontally over the tire forming drum 100 by a drive power cylinder 55 installed horizontally via a support 54.

A leading end W1 and a trailing end W of the cut tire constituent material W constituting this splicing device 50
As shown in FIGS. 3 and 4, the level difference detection device 40 for detecting the splicing device 4 is connected to a substantially L-shaped lever 44 via a pin 42 and a coil spring 43 to a bracket 41 suspended from a splicing device main body 54. is rotatably provided in a clockwise biased state. A detection roller 45 that rotates in sliding contact with the outer peripheral surface 100a of the tire building drum 100 is provided at the tip of the lever 44.
An actuating transformer 46 for detecting rotational displacement of the lever 42 is provided at the rear end. This operating transformer 46 is composed of a coil 47 and an iron core 48,
A contact 49 that comes into contact with the rear end of the lever 42 is provided at the tip of the iron core 48 .

Note that 49a is a compression spring.

Further, in the crimping means 70 disposed on the side of the step detection device 40, a crimping cylinder 71 is vertically attached to the splicing device main body 54, and the tip of the rod 72 of the crimping cylinder 71 is provided with a tire constituent material W. A trapezoidal head 73 is attached to press the end portion onto the tire building drum 100.

Further, the holding means 60 for holding the rear end W2 side of the tire constituent material W has a cylinder 63 formed in a hollow cylindrical shape fixed to the splicing device main body 54, as shown in FIGS. 5 to 8. A hollow cylindrical cylinder shaft 65 equipped with a piston 64 is slidably inserted into the cylinder 63 .

The piston 64 and the upper and lower lid members 66a, 66
The pressure chambers 67a and 67b in the cylinder 63 defined by b are provided with supply and discharge pipes 68a and 68b connected to a pressure fluid (air) supply source P (pump).
A three-way electromagnetic switching valve 69 is interposed in the middle of the supply/discharge pipes 68a and 68b. Further, a head 81 in which a plurality of needles 80 are implanted is detachably attached to the tip of the hollow cylinder shaft 65, as shown in FIGS. A vacuum pad 82 is provided to surround the head 81.

As shown in FIG. 6, the needle 80 implanted in the head 81 is attached so as to be inclined in the same direction as the supply direction X of the tire component material W.
When adsorbing the material and moving it to the tire forming drum 100 side, the material delivery plate 11 and the tire constituent material W
Even if it is pulled backward due to the close contact with the head 8
Needle 8 to prevent the tire constituent material W from falling off from 1.
0 bites into the tire constituent material W.

Also, a hollow portion 8 at the rear end of the cylinder shaft 65
3 is connected to one end of the supply/discharge pipe 84, and the other end is connected to an intake/pressure switching solenoid valve 85a and an intake/pressure switching solenoid valve 85a.
A pressure fluid (air) supply source (ejector-type vacuum generator 86
a, pump 86b). Note that 87 shown in FIG. 7 is a holding plate for the tire constituent material W, and 88 is a cylinder thereof.

Next, the operation of the present invention constructed as described above will be explained.

First, referring to FIGS. 1 and 2, the tip W of the tire constituent material W that has been transported
1, the material feeding plate 1 of the material feeding device 10
1 and the material holding plate 13, and the delivery cylinder 12 is operated to extend, and the tip part W1 is delivered to the position of point Q of the tire forming drum W. Next, the pressing cylinder 26 of the pressing device 20 is operated to extend, and the tip portion W1 of the tire constituent material W is pressed by the roller 21 via the link 25 and the swing arm 24 against the point Q of the tire forming drum 100. Splice.

From this state, next, the material holding cylinder 17 of the material feeding device 10 is extended and the material holding plate 13 is raised, and the tire constituent material W is moved up.
Open the tip W1 of.

Next, the rotation of the tire forming drum 100 is started, and the delivery cylinder 12 is contracted to move the material delivery plate 11 and the material pressing plate 13 back to their original positions.

When the tire forming drum 100 rotates to the position Q1 in FIG. 2 and stops, the pressing cylinder 26 and the cylinder 6 of the splicing device 50
3 and the crimping cylinder 71 start the extension operation,
The roller 21 and the heads 81 and 73 press and attract the rear end W2 side of the tire component W.

The operation by this holding means 60 is shown in FIGS. 5 to 8.
To explain with reference to the drawing shown in the figure, with the rear end W2 of the tire constituent material W being pressed, the three-way electromagnetic switching valve 69 provided midway between the supply and discharge pipes 68a and 68b is operated to increase the pressure. Pressurized air is supplied from the supply source P to the chamber 67a, and the cylinder 63 for raising and lowering
lower the cylinder shaft 65. As shown in FIG.
Pierce the 0 and make it bite.

From this state, the intake/pressure switching solenoid valve 85a is switched to the intake side, and at the same time, the intake/pressure solenoid valve 85b is operated to bring the supply/discharge pipe 84 and the hollow portion 83 of the cylinder shaft 65 into the intake state.

Then, since the rubber sheet material W is in a state where the vacuum pad 82 provided so as to surround the head 81 is in close contact with the tire constituent material W, the tire constituent material W is exposed to the intake air in the hollow part 83 of the ring shaft 65. The liquid is sucked up and adsorbed by the head 81.

In such a state, the drive power cylinder 55
The tire constituent material W is moved to the tire forming drum 100 through the tire forming drum 100. At this time, the tire constituent material W is attracted and held against the head 81 by the suction force of the plurality of needles 80 and the ejector type vacuum generator 86a. Since the head 8 is
The tire constituent material W will not fall off from the tire.

In this way, the tip W of the tire constituent material W
1 or the rear end W2 to a predetermined position on the tire forming drum 100, the holding plate 87 of the tire constituent material W is lowered via the cylinder 88, and at the same time, the intake/pressure switching solenoid valve 85a is switched to the pressure side. , the tire constituent material W is pressed onto the tire forming drum 100. Thereafter, a three-way electromagnetic switching valve 69 provided in the middle of the supply/discharge pipes 68a, 68b is operated to supply pressurized air from the supply source P to the pressure chamber 67b, and exhaust the pressure fluid in the pressure chamber 67a. The cylinder shaft 65 of the cylinder 63 is raised to its original position, and the entire holding means 60 is moved backward to its original position.

After the preparation for cutting the tire constituent material W is completed by the above operations, the drive motor 35 of the cutting device 30 is driven to rotate, and the cutter 31 attached to the cutter feeder 33 via the cutter holder 32 The rear end W2 side of the tire constituent material W is cut in the width direction.

When the cutting work is completed in this way, the pressing cylinder 26 is then contracted to raise the material pressing plate 13, and the feeding cylinder 12
This is to retract from the cutting position by a minute amount.

Then, the pressure cylinder 71 is contracted to open the rear end W2 of the tire constituent material W, and
The pressing cylinder 26 is contracted and the roller 21
to rise.

Next, after the tire constituent material W is cut to a predetermined length, the rotation of the tire forming drum 100 is started again, and at the same time, the driving power cylinder 55 is operated to start synchronous feeding of the splicing device 50.

After the rear end portion W2 of the tire constituent material W held at several points in the width direction by the splicing device 50 is sent to a specified position, that is, the splice position, the compression cylinder 71 of the compression bonding means 70 is operated to extend.
A trapezoidal head 73 splices the leading end W1 and the trailing end W2 of the tire constituent material W.

However, after the level difference detection device 40 detects the level difference, the pressure bonding means 7 is applied to both sides of the tire constituent material W in the width direction.
Activate 0 and splice.

This splicing operation will be explained in more detail with reference to FIGS. 9a to 9d.

Several locations in the width direction of the material (in this example, a to d)
) at the holding means 60 of the splicing device 50.
The rear end W of the tire constituent material W held by
2 is a splicing device 50 and a step detection device 40;
It is also sent in synchronization with the rotation of the tire forming drum 100 (see FIG. 9a).

Then, the drum surface 1 of the tire forming drum 100
00a, the detection roller 45 of the level difference detection device 40 comes into sliding contact, and as it moves further, the iron core 48 of the level difference detection device 40 comes into contact with the point 00a.
comes into contact with the stopper 90 and stops at that position.

Further, the splicing device 50 further advances in synchronization with the tire forming drum 100 (see FIG. 9b).

In this way, when the tire constituent material W reaches the predetermined splicing position, step detection is performed at the three central points of point b, c, and d, excluding both ends (point a, e) of the tire constituent material W. Regardless of the detection by device 40, head 73 of crimping means 70 descends to splice.

In addition, at both ends in the width direction (points a and e) of the remaining tire constituent material W, until the detection roller 45 of the step detection device 40 detects the step position with respect to the tip W1 of the tire constituent material W, It is stretched by the rotation of the tire building drum 100, and when a step is detected, the rotation of the tire building drum 100 is stopped (see FIG. 9c).

In such a state, the pressure bonding means 70 located at both widthwise ends (points a and e) of the tire constituent material W
descends to splice (see Figure 9 d), and when the splicing operation is completed, the crimping means 7
At the same time, the drive power cylinder 55 is operated to move the entire splice device 50 backward.

From this state, the pressing cylinder 26 is operated to smooth the splice portion between the leading end W1 and the trailing end W2 of the tire constituent material W using the roller 21, and the work is completed.

Since this series of operations is all performed automatically, splicing can be performed reliably and quickly.

〔Effect of the invention〕

This invention provides a splicing device as described above,
holding means for holding the rear end side of the tire constituent material;
A plurality of splicing devices are arranged at both widthwise ends of the tire constituent material and at a predetermined interval therebetween, and each Each splice device is provided with a step detection device that detects a step in the tire constituent material, and after the tire constituent material is cut by the cutting device, the splicing device is installed at both ends of the tire constituent material in the width direction and in between. The tire forming drum is held by a splicing device equipped with a plurality of step detection devices, and the tire forming drum is rotated to the splice position of the tire constituent materials, and the splicing device and the step detection device are moved in synchronization, and the tire configuration is determined at the splice position. In addition to bonding the materials, both ends of the tire component materials in the width direction were pulled to the position where the step detection device detected the step, and the end portions of the tire component materials were joined. When winding a constituent material, especially a belt-shaped rubber material with low rigidity, around a tire constituent material and joining its leading and trailing ends, it is possible to connect the short side to both widthwise edges of the tire constituent material without relying on human hands. Even if this happens, the positions of the leading and trailing edges of the tire constituent materials are always automatically determined and joined, which prevents the joint from opening and allows for accurate joining, which improves accuracy. This has the effect of making it possible to manufacture tires with high quality.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a tire constituent material joining apparatus embodying the present invention, FIG. 2 is a front view of FIG. 1,
Fig. 3 is a front view of the step detection device, Fig. 4 is a side view of Fig. 3, Fig. 5 is an enlarged sectional view of the holding means in the splicing device, and Fig. 6 is a sectional view of the head portion of the holding means. , FIG. 7 is an explanatory diagram showing the state in which the tire constituent material is held by the holding means, FIG. 8 is a plan view of the head section, and FIGS. 9a to 9d are the operating states of the splicing device. FIG. DESCRIPTION OF SYMBOLS 10... Material feeding device, 20... Pressing device, 30... Cutting device, 40... Level difference detection device, 50... Splicing device, 60... Holding means, 70... Pressing device, 100... Tire forming drum , W...tire constituent material, W1... tip part,
W2... Rear end.

Claims (1)

[Claims] 1. A step of feeding the tire constituent material to a predetermined position on the tire forming drum while holding the leading edge of the tire constituent material by a material feeding device, and a step of pasting the leading end of the tire constituent material onto the tire forming drum by a pressing device. and, after releasing the tire constituent material held by the material feeding device, wrapping the tire constituent material around the tire forming drum, and wrapping the tire constituent material to a predetermined length while holding the rear end side of the tire constituent material by the pressing device. and a step of detecting the rear end of the cut tire constituent material with a detection device and joining it to the leading end of the tire constituent material wrapped around the tire forming drum by a splicing device. In the method for joining tire constituent materials, the tire constituent material is cut by a cutting device, and then the width direction thereof is spliced at both ends of the tire constituent material in the width direction and a plurality of step detection devices disposed therebetween. held by a device;
The tire forming drum is rotated to the splice position of the tire constituent materials, and the splicing device and the step detection device are moved in synchronization to join the tire constituent materials at the splice position, and both ends of the tire constituent materials in the width direction are 1. A method for joining tire constituent materials, which comprises joining end portions of tire constituent materials by pulling them to a position where a step is detected by a step detection device. 2. A material feeding device that supplies the tire constituent material to a predetermined position on the tire building drum, a pressing device that sticks the leading end of the tire constituent material onto the tire building drum, and a state in which the rear end side of the tire constituent material is held by the pushing device. a cutting device that cuts the tire component material to a predetermined length; a detection device that detects the leading and trailing ends of the cut tire component material; A splicing device for joining tire constituent materials comprising a splicing device for joining a rear end portion of the tire constituent material, wherein the splicing device is connected to a holding means for holding the rear end side of the tire constituent material, and a splicing device for joining the rear end side of the tire constituent material to a leading end portion. A plurality of splice devices are arranged at both widthwise ends of the tire constituent material at a predetermined interval therebetween, and each splice device is provided with a step portion of the tire constituent material. 1. A joining device for tire constituent materials, characterized in that each device is provided with a step detection device for detecting the difference in level.