JPS62135355A - Method and apparatus for laminating rubber sheets with steel cord - Google Patents

Abstract

PURPOSE:To laminate rubber sheets with steel cords with good accuracy by a method in which the tip and back ends of rubber sheets are detected by a sensor, and they are laminated and bonded by correcting the interval of steel cords to a given value while holding at least one of the tip and back ends by a sucker. CONSTITUTION:Several points of a tip W1 are detected and stored by a sensor 6 at the point A, and the tip W1 is stopped near a fixed point B. The tip W1 is held by a plurality of suckers 14, moved from the point B to the fixed point C of a drum 2, and pressingly welded with the fixed point C of the drum 2. The drum 2 is turned at a given speed by a given angle to drive sending conveyer 3b synchronously. The back end W2 sent out is moved on the tip W1 wound around the drum 2 in such a way as to keep a given interval alpha of steel cords. In case where the steel interval alpha between the tip W1 and the back end W2 is of a corrugated form, they are lapped while correcting.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a laminating device for rubber sheet material containing steel cords, and more specifically, the present invention relates to a laminating device for laminating a rubber sheet material containing steel cords, and more specifically, a bonding device for laminating a rubber sheet material containing steel cords to be wound around a tire forming drum. The present invention relates to a method and apparatus for laminating steel cord-containing rubber sheet materials, in which the rubber sheet material and the rear end are automatically laminated at predetermined positions with high accuracy.

[Prior art]

Conventionally, as a method for laminating rubber sheet materials such as steel cord carcass, an operator visually determines the steel cord between the leading and trailing ends of the rubber sheet material, The bonding work was carried out by correcting the steel cords buried at the same angle and at regular intervals.

However, this type of work requires skill as it is a visual judgment by the operator, and it is difficult to make accurate corrections so that the tip side is straight. If the steel cords buried at the leading and trailing ends of the material overlap each other, the rubber thickness in that area will become thicker, causing problems such as the surface of the molded tire becoming dented, and the spacing between the steel cords will increase. There was a problem that if the opening was too large, the strength of that part would be weakened.

[Structure of the invention]

In order to achieve the above object, the present invention provides a method for bonding the leading and trailing ends of a rubber sheet material containing a steel cord to be wrapped around a tire forming drum, the leading end of the rubber sheet material containing a steel cord being conveyed. is detected by a plurality of metal detection sensors disposed in a direction perpendicular to the conveying direction of the rubber sheet material, and then the leading end is held by a plurality of suction devices and transferred to a tire forming drum where it is crimped. When the tire forming drum is rotated by a predetermined angle from this state and the rear end of the steel cord-containing rubber sheet material is detected by the plurality of metal detection sensors, the rear end is suctioned and held by the suction device, and the rubber The steel cord is transferred to the leading end of the sheet material, and the steel cord embedded in the rubber sheet material is corrected so that the leading end and trailing end are at the same angle and coincide, and the steel cord between the leading end and trailing end is The gist of this method is to correct the cord spacing so that it is constant, and then bond the rear end side of the rubber sheet material to the front end side.

The present invention also provides a device for laminating the leading and trailing ends of a rubber sheet material containing steel cords to be wound around a tire forming drum, and in which an upper part of the leading end side of the conveyor is placed in a direction perpendicular to the conveying direction of the rubber sheet material. Multiple pieces are placed in the
The gist of the present invention is to provide a metal detection sensor and a suction device that can move forward and backward with respect to the tire forming drum.

[Embodiments of the invention]

The present invention will be described in detail below based on the accompanying drawings.

FIG. 1 is a front view of a bonding device for bonding the leading end w1 and rear end -2 of a rubber sheet material W of steel cord S size according to the present invention. Figure 2 shows an enlarged plan view of Figure 1;
This laminating device 1 includes feed conveyors 3a and 3b that sequentially supply rubber sheet material W to a tire forming drum 2, a cutter feed device 4 that cuts the rubber sheet material W into a predetermined length, and a tip end of the feed conveyor 3b. It is composed of a material suction device 5 disposed on the upper side and a detection means 6 (metal sensor) for detecting the positions of the leading end -1 and the rear end of the rubber sheet material W.

The cutter feeding device 4 moves the cutter 8 by a driving device 7.
moves up and down to cut the rubber sheet material W fed on the feed conveyor 3a.

Further, the material suction device 5 and the detection means 6 are arranged at a plurality of locations (in this embodiment, pl, Pg, P2.P
4. Ps), and the entire material suction device 5 and the entire detection means 6 are attached to a support frame 9.

The support frame 9 is supported by a guide rail 10 and is moved forward and backward in the left and right directions in FIG. The power cylinders 12 are configured to be individually moved forward and backward by a plurality of power cylinders 12.

Therefore, the material adsorption device 5 and the detection means 6 can be moved as a whole or can be operated individually.

In FIG. 2, reference numeral 17 denotes a rotatable press roll that presses the tip W1 of the rubber sheet material W onto the surface of the tire forming drum 2, and this press roll 17 is connected to a lifting device (not shown) via an arm 18. It can be rotated in the vertical direction.

To explain the material adsorption device 5 in more detail, the material adsorption device 5 includes an adsorption holding means 14 equipped with an elevating cylinder 13.
and a peeling device 16 for the rubber sheet material W provided with an elevating cylinder 15, and this suction holding means 14 is constructed as follows.

That is, as shown in FIG. 4, the suction holding means 14 has a hollow cylindrical cylinder shaft 2 equipped with a piston 24 inside a hollow cylindrical cylinder 23 fixed to a frame 22.
5 is slidably inserted.

Pressure chambers 27a, 27 within the cylinder 23 defined by the piston 24 and the upper and lower cover members 26a, 26b.
b, a supply/discharge pipe 28a connected to a pressure fluid (air) supply source P (pump);

28b is connected, and a three-way electromagnetic switching valve 29 is interposed in the middle of the supply/discharge pipes 28a, 28b.

A head 31 in which a plurality of needles 30 are implanted is detachably attached to the tip of the hollow cylindrical cylinder shaft 25, and a vacuum pad 32 is provided around the head 31 so as to surround the head 31. It is being

The needle 30 implanted in the head 31 is attached so as to be inclined in the same direction as the feeding direction The needle 30 is configured to bite into the rubber sheet material W so that the rubber sheet material W does not fall off from the head 31 even if it is pulled backward due to the adhesive force between the head 31 and the rubber sheet material W.

Further, one end of a supply/discharge pipe 34 is connected to the hollow portion 33 at the rear end of the cylinder shaft 25, and the other end is connected to the intake/pressure air switching solenoid valve 3ja and the intake/pressure air solenoid valve 35b. It is connected to a pressure fluid (air) supply source (ejector set vacuum generator 36a, pump 36b).

Since the structure is as described above, the feed conveyor 3a,
When the rubber sheet material W conveyed by 3b reaches a predetermined position on the suction holding means 14 of the general conveyance line between the front end and the rear end, the three-way electromagnetic switching valve provided in the middle of the feeding pipes 28a and 28b opens. 29 to open the pressure chamber 27a.
Pressurized air is supplied from the supply source P to lower the cylinder shaft 25 of the lifting cylinder 23.

Then, as shown in FIG. 2, the needle 30 provided on the head 31 is pierced into the top surface of the leading edge -1 or the trailing edge of the rubber sheet material W.

From this state, the intake/pressure air switching solenoid valve 35a is switched to the intake side, and at the same time, the intake/pressure air solenoid valve 35b is operated to bring the feed pipe 34 and the hollow portion 33 of the cylinder shaft 25 into the intake state.

Then, the rubber sheet material W is in a state where the vacuum pad 32 provided so as to surround the head 31 is in close contact with the rubber sheet material W. The liquid is sucked up and adsorbed by the head 31.

From this state, the rubber sheet material W is moved to the tire molding dome 2 side via the power cylinder 11. At this time, the rubber sheet material W is moved against the head 31 by a plurality of needles 30. Since the rubber sheet material W is attracted and held by the suction force of the ejector and vacuum generator 36a, the rubber sheet material W will not fall off from the head 31 during conveyance.

Next, the steel S on the front end Wl side and the rear end -2 side of the rubber sheet material W is set at a predetermined steel interval α (approximately 1 of the steel diameter).
A method will be described in which the steel S on the front end -1 side and the steel S on the side between the rear ends are laminated while being corrected so that they are superimposed by /2) and are parallel to each other at the same inclination angle.

First, a rubber sheet material W formed into a sheet is conveyed by the feed conveyors 3a and 3b, and cut at a position corresponding to the length of the -turn of the tire building drum 2 by the cutter feed device 4. Next, feed conveyors 3a, 3b
The rubber sheet material W cut into a predetermined length by It is detected by the detection means 6 and its position is memorized. and a feed conveyor 3 electrically connected to the detection means 6
The drive motors 8 (not shown) of a and 3b are controlled so that the tip end of the rubber sheet material W stops near the fixed point B.

From this state, the power cylinder 11 is extended to move the material suction device 5 to the vicinity of the tip -1 of the rubber sheet material W, and the lifting cylinder 13 is activated here to collect the rubber by the plurality of material suction means 14. The leading end -1 of the sheet material W is held by suction.

Next, the power cylinder 11 is operated to move the plurality of material suction means 14 from the fixed point B to the fixed point C position on the tire forming drum 2, and the feed conveyor 3b is rotated in synchronization with the power cylinder 11.

In this way, when the center of the tip 1 of the rubber sheet material W coincides with the fixed point C of the tire building drum 2, the tip 1 of the rubber sheet material W held by the material suction means 14 is peeled off via the device 16. The tire is moved to a fixed point C on the tire forming drum 2, and is pressed by a pressing roll 17.

From this state, the tire forming drum 2 is rotated at a predetermined speed and through a predetermined angle, and in synchronization with this, the feed conveyor 3b is rotationally driven.

In this way, the detection means 6 detects the rear end 2 of the rubber sheet material W that has been sent out sequentially, and when the rear end 2 comes close to the fixed point B, the tire forming drum 2 and the feed conveyor 3b are removed. Drive stops. At this time, the detection means 6 stores each position from point A to rear end -2.

Next, in the same manner as described above, the elevating cylinder 13 is operated to suck and hold the rear end W2 of the rubber sheet material W by the plurality of material suction means 14, and each power cylinder 12 is operated to extend to hold the rear end W2 of the rubber sheet material W. The rear end -2 is moved a predetermined distance from point B to point 0 so that the tip Ml of the rubber sheet material W that has been previously wound around the tire forming drum 2 is a predetermined steel interval α.

Further, at this time, the power cylinder 11 and the feed conveyor 3b are driven in proportional synchronization with the tire forming drum 2.

In this state, the rear end H2 of the rubber sheet material W is removed from the suction holding means 14 by the peeling device 16 and moved to a fixed point B on the tire forming drum 2.

In addition, if the steel interval α between the leading end and the rear end -2 of the rubber sheet material W is wavy at this time, if the lamination is continued as is, the overlapped portion will be longer than the steel interval α, In addition, the length may become shorter, or there may be a point where the leading end 1 and the trailing end 2 do not overlap, resulting in the production of defective tires later on, so it is necessary to correct the dimensions of the overlapping part as described above. There is.

This correction is performed by detecting each position of the leading edge W1 and trailing edge -2 of the rubber sheet material W by a plurality of detection means 6, and if the length of the overlapping part is smaller than the steel interval α, that is, , shorter than the length of the steel interval α (if the overlapping part is short, move that part to the power cylinder 1
2 and the rear end W of the rubber sheet material by the suction holding means 14.
Hold 2 by suction and overlap them so that the steel spacing is α while pulling them toward the tip side. Also, if the overlapping part is long, that is, if there is an overlapped part that is larger than the steel spacing α, use the above method. Similarly, the power cylinder [2] and the suction holding means 14 suction and hold the rear ends of the rubber sheet material to overlap and correct the steel so that a predetermined steel spacing α is obtained.

In addition, when making corrections, make corrections so that the steel S on the leading edge -1 side of the rubber sheet material W and the steel S on the same side of the rear end are parallel and have the same spacing, and at the same time, by the above-mentioned operation, the steel S The polymerization is performed so that the spacing is α.

In this way, the leading end W1 and the trailing end of the rubber sheet material W are
2 and 2 are bonded together to form an optimal overlapping part to produce a highly precise tire.

〔Effect of the invention〕

The present invention is a method for bonding the leading and trailing ends of the steel cord-containing rubber sheet material to be wrapped around a tire forming drum as described above. After the sheet material is detected by multiple metal detection sensors arranged in a direction perpendicular to the conveyance direction, the leading edge of the sheet material is held by multiple suction devices and transferred to a tire forming drum where it is crimped. When the tire forming drum is rotated by a predetermined angle and the rear end of the rubber sheet material into which the steel cord is inserted is detected by the plurality of metal detection sensors, the rear end is suctioned and held by the suction device, and the rubber sheet material is The steel cord embedded in the rubber sheet material is corrected so that the front and rear ends are at the same angle and match, and the steel cord interval between the front and rear ends is adjusted. Since the rear end side of the rubber sheet material is pasted to the leading end side by correcting so that It is possible to always maintain high accuracy in lamination, and since everything is done automatically, it has the effect of significantly improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a front view of a rubber sheet material laminating apparatus embodying the present invention, Fig. 2 is a perspective view showing a state in which the end portions of rubber sheet materials are laminated, and Fig. 3 is an enlarged plan view of Fig. 1. , 4th
The figure is a sectional view of the material adsorption device. 1... Lamination device, 2... Tire forming drum, 5.
...Material adsorption device, 6...Metal detection sensor, S...
Steel cord, W...Rubber sheet material, ■...Tip, consignment...Rear end.

Claims (1)

[Claims] 1. A method of bonding the leading and trailing ends of a steel cord-containing rubber sheet material to be wrapped around a tire forming drum, comprising:
After the tip of the steel cord-containing rubber sheet material being conveyed is detected by a plurality of metal detection sensors arranged in a direction perpendicular to the conveyance direction of the rubber sheet material, the tip is detected by a plurality of suction devices. When the rubber sheet material containing the steel cord is detected by the plurality of metal detection sensors, the tire forming drum is rotated at a predetermined angle from this state, and the rear end of the steel cord-containing rubber sheet material is detected by the plurality of metal detection sensors. The suction device suctions and holds the rear end and transfers it to the leading end of the rubber sheet material, so that the steel cord embedded in the rubber sheet material has the leading end and the trailing end at the same angle and coincides with each other. A steel cord-containing rubber sheet material characterized in that the rear end side of the rubber sheet material is laminated to the front end side of the rubber sheet material by correcting the distance between the steel cords to be constant between the front end side and the rear end side. Pasting method. 2. A device for bonding the leading and trailing ends of a steel cord-containing rubber sheet material to be wrapped around a tire forming drum,
A plurality of metal detection sensors and suction devices are provided on the top end of the conveyor in a direction perpendicular to the direction of conveyance of the rubber sheet material, and are movable forward and backward with respect to the tire forming drum. A laminating device for rubber sheet materials containing steel cord.