JPH09176930A - Return roll device of oven in cord dip treating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to easily clean a return roll device by simply removing a return roll and provide the return roll device of an oven in a cord dip treating machine capable of maintaining objective physical properties of the cord by bringing rotational friction of the return roll to be small. SOLUTION: In this return roll device of oven in a cord dip treating machine, a cord 10 used as a core wire of industrial belts such as a power transmission is wound around a dip roll held in a dipping vessel, dipped in a treating liquid, turned around a return roll device 12 arranged at the gateway of an oven and heat treated with repeatedly and reciprocally moving in the oven. In the return roll device, return rolls 33 of at least more than an equal number of turns of the cord are constituted to be rotatably supported in a skewering way on a shaft 35 and the shaft 35 and the return rolls 33 inserted to the shaft are removably fitted unitedly to a bracket 39 arranged at the gateway of the oven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a return roll device for an oven in a cord dip processing machine, and more specifically, it is possible to remove the return roll device from the cord dip processing machine and easily clean it in a short time, and if necessary. The present invention relates to a return roll device for an oven in a cord dip processing machine, in which a spare roll that has been cleaned can be replaced.

[0002]

2. Description of the Related Art Industrial belts for power transmission, such as V-belts, V-ribbed belts, and toothed belts, are made of a fiber material such as polyester fiber, aramid fiber, or glass fiber as a core wire as a tensile member. And the code is used. This cord is RFL (resorcin formalin latex) treated only, or RFL treated after pre-treatment with epoxy or isocyanate compound, or rubber glue is adhered after RFL treatment in order to enhance the adhesiveness with rubber material. I was

The above cord is continuously withdrawn from the creel by the first driving roll of the cord dipping machine, impregnated with the adhesive liquid in the first dip tank, and then sent into the first oven to be dried by heating. After being cooled outside the oven and sent to the second drive roll, the first treatment step is completed while applying a constant tension between the first drive roll and the second drive roll, and then the second, third, fourth Repeatedly pass through the same treatment steps as above, and impregnating and adhering the treatment liquid with a different composition for each step, and heat stretching treatment under different oven temperature conditions and tension conditions to give the belt the optimal cord physical properties. It was wound up on a reel and the dip processing was completed.

In this cord dipping machine, a rotatable return roll shaft is supported by a bracket having a double-sided or cantilever structure at the entrance and exit of the oven, and the cord is circulated around the return roll to make a plurality of cycles in the oven. The treatment liquid impregnated in the cord by reciprocating was heated and dried in the oven.

[0005]

However, in the conventional cord dip treatment machine, a part of the solid component contained in the treatment liquid is separated from the outer peripheral surface of the return roll as the cord dip treatment operation time elapses. Since it adheres to and accumulates on the surface, it was removed and cleaned while the processing machine was stopped. However, if the return roll is still attached to the processing machine, the space inside the machine is narrow, and the cord obstructs the cleaning of the part, which requires time.

Therefore, it is possible to remove the return roll and clean it. However, in a bracket having a double-supported return roll shaft, it takes a long time to disassemble and take it out. Further, in order to simplify the take-out of the return roll, when the return roll shaft is cantilevered, it is necessary to suppress the flexure of the shaft against the cord tension, and therefore the shaft diameter must be increased, which is why In addition, the bearing of the return roll is also large, which causes an increase in rotational friction of the return roll. Further, the rotational friction changes and increases with the number of code passes in the oven, and heating and drying treatment under constant tension in the oven cannot be performed, which may impair the physical properties of the cord. The present invention has been made in view of the above circumstances and solves such problems. The return roll can be easily removed to facilitate cleaning, and the rotational friction of the return roll can be reduced. An object of the present invention is to provide a return roll device for an oven in a cord dip processing machine that can maintain the physical properties of cords.

[0007]

That is, according to the present invention, a cord used for the core wire of an industrial belt for power transmission is wound around a dip roll contained in a dip tank, dipped in a processing solution, and then an oven inlet / outlet port is provided. In a cord dip processing machine that performs heat treatment while repeatedly reciprocating in an oven by revolving a return roll device disposed in the section, in the above-mentioned return roll device, at least a number of return rolls equal to or more than the number of code turns are skewered around a shaft This is a return roll device for an oven in a cord dip processing machine, which is rotatably supported and is detachably attached to a bracket installed at an inlet / outlet portion of an oven integrally with a shaft and a return roll fitted therein.

Further, according to the present invention, in the case where the return roll rotatably supported on the shaft is integrally formed with the connecting means, or the stem portion in which the bracket is arranged parallel to the shaft supporting the return roll. And an arm portion protruding from the stem portion and supporting both ends of the shaft at both ends, and when the stem portion is arranged at a position close to the oven side, at least one cord separator pin is arranged in the cord advancing direction. Including the case where they are fixed to the stem part alternately in the zigzag state one by one in the middle part of the adjacent cords.

[0009]

According to the oven return roll device in the cord dip processing machine of the present application, the bracket and the return roll shaft are supported by both ends so that the return roll arranged at the oven entrance / exit can be easily removed from the processing machine. One of the arms can be disassembled, and all the return rolls removed at that time are integrated with the shaft by a connecting means such as a retaining ring, so that the detaching and cleaning work can be performed very easily.

Further, in the invention of claim 3, since the bracket is supported by both ends of the return roll shaft, the shaft is thinner than the cantilever structure, and the bearing is downsized to reduce the rotational friction of the return roll. You can
And the influence on the cord tension can be controlled to be low. Further, even when the shaft of the return roll is supported on both sides, in the present application, by providing the stem portion closer to the oven than the return roll, the orbiting work to the return roll at the time of passing the cord and the return roll are performed. It is possible to easily carry out the attachment and detachment work without any hindrance.

In the invention of claim 4, a plurality of cord separator pins are alternately arranged in a zigzag pattern on the stem portion in the middle portion of adjacent cords in the advancing direction of the cords. , When the cords are threaded and when the return roll is removed, the cords are aligned and held so that the cords are always correctly aligned.

[0012]

1 is an overall view of a cord dipping machine according to the present invention, FIG. 2 is a partial cross-sectional plan view of a return roll device according to the present invention, FIG. 3 is a partially enlarged view of FIG. 2, and FIG. 4 is a view on arrow AA of FIG. In the code dip processing machine 1 shown here, four zones including a first processing unit 2, a second processing unit 3, a third processing unit 4, and a fourth processing unit 5 are mounted on a common frame 6. Each processing unit has basically the same structure, and the mounting members are also the same.

The oven 7 (7a, 7b, 7) of each processing section
c, 7d) are arranged horizontally and are of an indirect heating type in which hot air is forcibly circulated. The heated air generated from the indirect heating heater 8 arranged outside the oven 7 a is forced to flow in the oven 7 by the fan 9 that circulates hot air, and then circulates through the duct 14.
The oven 7 is provided with a door 11 on the side facing the cord passing work surface 35 (the side on which a worker passes a cord or inspects a cord or a processing solution), and a return roll device is provided at an entrance of the oven 7. 12 and 13 are provided.
An operation panel 36 is installed in an inclined space on the inlet side of the ovens 7a and 7b. A temperature control device, a gas concentration detector, and an intake / exhaust duct (none of which is shown) may be provided.

The cord 10 to be treated is wound around a paper tube 16 supported by a creel stand 15 in an untreated white background. The cord 10 is pulled out at a constant speed by the first drive roll 17a having a speed control means, is given a slight pretension by the friction tensioner 23 via the guide ring 21, and is passed through the guide roll 26 to the dip tank elevating means 27. Enter the installed dip device 20.

The dip device 20 comprises a dip tank 19 containing the processing liquid 18 automatically supplied from the processing liquid tank 28 and a dip roll 16 rotatably supported above the dip tank 19. A part is arranged so as to be immersed in the treatment liquid 18 in the dip tank 19.

The cord 10 is wound around the dip roll 16 in the dip tank 19 so as to be immersed in the treatment liquid 18 for the first time.
The return roll device 12, which enters the oven 7a via the drive roll 17a and is arranged at the entrance / exit of the oven 7a,
After being heated and dried by reciprocating in a spiral shape several times between 13 and then cooled in the atmosphere outside the oven 7a, it is transferred to the second drive roll 17b and the first processing unit 2 is finished. The second drive roll 17b has a speed control function with the first drive roll 17a as a reference, and applies an optimum tension to the cord 10 in the first processing unit 2.

Similarly, the code 10 is the second processing unit 3 between the second drive roll 17b and the third drive roll 17c having a speed control mechanism based on the rotation speed of the second drive roll 17b, and further the third processing unit.
The third processing unit 4 between the drive roll 17c and the fourth drive roll 17d having a speed control mechanism based on the rotation speed thereof, and finally, the fourth drive roll 17d and the speed based on the rotation speed thereof. In the fourth treatment section 5 between the fifth drive rolls 17e having a control mechanism, treatment liquids having different formulations (for example, pre-dip liquid, RFL liquid, soaking liquid) and heat drying conditions (oven temperature, number of code paths). ), The process is performed under cord tension.

After passing through the pull-out roll 29, the cord 10 is
It is sent to the winder 31. Code 1 for winder 31
0 is wound around the winding reel 32 alternately through the two guide rolls 30, and the dip processing work is continuously performed.

In the above return roll devices 12 and 13, return rolls 33 having V-shaped grooves for accommodating the cord 10 on the outer peripheral surface are arranged on a shaft 35 in a skewered pattern at a constant pitch via spacers 36 and 37, The bearing 34 is rotatably supported by a bearing 34, is integrally configured with a retaining means 38 such as a retaining ring, and is supported on both sides by a bracket 39 fixed to the frame 6 with bolts 45.

The bracket 39 comprises a stem portion 40 extending from the frame 6 in parallel with the shaft 35, an arm portion 41 integrated with the stem portion 40 and an arm portion 42 separate from the stem portion 40. 40 and the arm portion 42 are positioned by two pins 44. Arm portion 41,
42 is a shaft 3 for holding the return roll 33 in the middle.
Both sides of 5 are supported and fastened by one bolt 43. The bolt 43 has a rounded root and can be knurled on the circumferential surface of the head and gripped by hand, or the root can be rotated and removed by using a wrench.

Thus, in order to take out the return roll 33, the bolt 43 is removed and the arm portion 42 is moved to the stem portion 40.
And the end portion of the shaft 35 is made to escape from the arm portion 41, and the cord 10 accommodates the return roll 33.
It is carried out by moving it to the side of the stem portion 40 until it comes off the shaped groove, whereby cleaning or replacement of the cleaned spare roll can be carried out. At this time, the cords 10 are individually separated by the cord separator pins 46 and held on the stem portion 40 to maintain the arrangement. The return roll 33 can be easily attached to the bracket 39 in the reverse order of the above.

Also, when the cord 10 is newly passed, since the stem portion 40 is located closer to the oven 7 than the return roll 33, it is necessary to support the work of passing the cord 10 back and forth. There is no. The pinch roll 47 is a pressing roll for preventing the cord 10 from loosening and coming off the groove of the return roll 33 during the cord passing operation, and an arm 53 that can be swung by an actuator (not shown) such as an air cylinder. A roll 50 having a cushion layer 51 made of rubber, soft resin or the like on its outer circumference is rotatably supported by a bearing 49 on a cantilevered shaft 48 fastened to and fixed by a retaining ring 52. Incidentally, it is desirable that the contact with the return roll 33 is opened when the cord is not threaded.

[0023]

According to the present invention, the return roll disposed at the oven entrance / exit is formed integrally with the shaft, and the bracket supporting the return roll is divided into two parts by removing one bolt. Since it can be easily removed from the machine, it can be easily cleaned in a short time without being constrained by the internal space of the processing machine, and can be replaced with a cleaned spare roll if necessary and installed quickly. Can be restored. Further, since the bracket supports the shaft of the return roll with both ends, not only the bearing can be downsized to reduce the rotational friction of the return roll, but also the influence on the cord tension can be controlled low. Further, by alternately arranging a plurality of cord separator pins on the stem portion in a zigzag pattern one by one in the middle portion of the adjacent cords along the traveling direction of the cords, at the time of passing the cord and removing the return roll. As a result, the cords can be aligned and held, the cord alignment order can be always maintained correctly, and the knots of the cords can be passed smoothly without any difficulty.

[Brief description of the drawings]

FIG. 1 is an overall view of a code dip processing machine according to the present invention.

FIG. 2 is a plan partial cross-sectional view of a return roll device according to the present invention.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a view taken in the direction of arrows AA in FIG. 2;

[Explanation of symbols]

 1 Code Dip Processing Machine 2 1st Processing Section 3 2nd Processing Section 4 3rd Processing Section 5 4th Processing Section 6 Frame 7 Oven 10 Code 12 Return Roll Device 13 Return Roll Device 33 Return Roll 35 Shaft 38 Interlocking Means 39 Bracket 40 Stem part 41 Arm part 42 Arm part 46 Code separator pin

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takashi Masuda 4-1-21, Hamazoe-dori, Nagata-ku, Kobe Mitsuboshi Belt Co., Ltd.

Claims (4)

[Claims] 1. A cord used for the core wire of an industrial belt for power transmission is wound around a dip roll contained in a dip tank, dipped in a treatment liquid, and then wound around a return roll device arranged at an inlet / outlet portion of an oven. In the cord dip processor that heats while repeatedly reciprocating in the oven, in the above return roll device, at least a number of return rolls equal to or more than the number of cord turns are rotatably supported in a skewered manner on the shaft, and the shaft and this A return roll device for an oven in a code dip processing machine, characterized in that the return roll fitted in the unit is detachably attached to a bracket installed at an oven entrance / exit portion. 2. A return roll device for an oven in a cord dip processing machine according to claim 1, wherein the return roll rotatably supported on the shaft is integrally constituted by a connecting means. 3. The bracket comprises a stem portion arranged in parallel with a shaft supporting a return roll, and an arm portion protruding from the stem portion and supporting both ends of the shaft at both ends. Further, the stem portion is on the oven side. The return roll device for the oven in the cord dip processor according to claim 1, which is arranged at a position close to the above. 4. At least one cord separator pin is fixed to the stem portion in a zigzag pattern one by one along the advancing direction of the cord and alternately in the intermediate portions of adjacent cords. Oven return roll device in the code dip processor described.