JP2963408B2 - Cord feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord feeding device for automatically winding a cord after inserting a canvas into a mold in a transmission belt manufacturing line.

[0002]

2. Description of the Related Art Conventionally, in a power transmission belt manufacturing line, a cord is wound around after inserting a canvas into a mold. At the beginning of winding the cord, the leading end of the cord is attached to a canvas having an adhesive rubber layer. The upper part is crimped, and the end of the winding is manually cut by a worker by cutting the cord with a cutter and stopping by crimping.

Further, the cord is fed from a cord bobbin for storing the cord by a feeding means, and a tension is applied to the cord by applying a load to the cord through a dancer device.
It is wrapped around.

[0004]

According to the above,
At the beginning and end of the winding of the cord, the position of the dancer device changes greatly, and the tension is unstable. That is, at the beginning of winding, the dancer device rises and the tension increases, and at the end of winding, the dancer device descends and the tension decreases. As a result, the cord tension varies at the portion corresponding to the beginning of the cord winding, at the end of the cord winding, and at the intermediate portion thereof, and the length of the formed power transmission belt differs.

[0005] The present invention has been made in view of such a point, and it is an object of the present invention to provide a cord payout device in which the cord tension is stable from the beginning to the end of the winding of the cord.

[0006]

According to the present invention, there is provided a cord feeding device for feeding a cord to be sequentially wound while being moved by a code carrier in a process of manufacturing a transmission rubber belt, comprising: a code bobbin means for storing the cord;
A tension motor having a feed motor associated with the code bobbin means for feeding the cord, a shaft member rotatably supported, and tension rolls supported on both ends of the shaft member and around which the cord is wound; Rocking motor means for rocking the tension roll means associated with the roll means, and maintaining the cord tension at a substantially constant value; speed detecting means for detecting a cord payout speed after passing through the tension roll means; A delivery control means for receiving the signal from the speed detection means and controlling the delivery motor based on the delivery speed of the cord.

Accordingly, the tension roll means is swung by the swing motor means so that the cord tension becomes a constant value, and the feeding motor is controlled by the feeding control means so as to follow a change in the winding dimension of the cord. The code is controlled so as to have a high precision and a constant code tension.

Further, the feeding control means controls the feeding motor when the code carrier returns to the initial position after the completion of the winding of the cord, and rewinds the surplus cord to the code bobbin.

Therefore, when the code carrier returns to the initial position, the code bobbin is automatically rewound, so that the cord is not loosened.

[0010] Further, a code remaining amount detecting means associated with the code feeding means for detecting a remaining code amount based on the code usage amount, receiving a signal from the code remaining amount detecting means, and feeding the code before starting the code feeding operation. A replacement instructing means for outputting a bobbin replacement signal when the remaining cord amount is smaller than the amount required for the work. Therefore, by replacing the code bobbin when the remaining amount of the cord is small, it is possible to prevent the occurrence of the cord joint part during the winding of the cord. .

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

A code feeding device 11 shown in FIG. 1 has a transport base positioning sensor 12 for detecting that the transport base 4 has reached a predetermined position, and receives a signal from the sensor 12 and moves the transport base 4 to a predetermined position. When it reaches the upper and lower mold holders 13, 1 to clamp and fix the mold 1
4 is provided.

The upper mold retainer 13 is connected to a main shaft 15, which is connected to a drive motor 19 via a first driven pulley 16, a belt 17 and a drive pulley 18.
It is designed to rotate by the rotation of the drive motor 19. Reference numeral 20 denotes a cylinder means for moving the lower mold holder 14 up and down.

A ball screw shaft 21 is rotatably disposed in parallel with the main shaft 15 and the mold 1. The upper end of the screw shaft 21 is connected to a lower shaft 23a of a brake clutch unit 23 via a coupling 22. It is connected to. The upper shaft 23b of the brake clutch unit 23 is connected to a third driven pulley 26 that rotates integrally with the first driven pulley 16 via a second driven pulley 24 and a belt 25.

An L-shaped linear head 27 is screwed onto the ball screw shaft 21 so as to be movable in the mold axis direction.
It is configured to move in the vertical direction by the rotation of the drive motor 19. On the linear head 27, a code carrier 31 is screwed to another ball screw shaft 28 so as to be able to advance and retreat in the horizontal direction, that is, with respect to the mold 1. Incidentally, reference numeral 29 denotes a first limit switch for detecting the origin position of the code carrier 31, and reference numeral 30 denotes a second limit switch for detecting the retreat position of the code carrier 31 (FIG. 2).
reference).

On the other hand, the code 7 is supplied to the code carrier 31 from the code bobbin 6 (code bobbin means). That is, the delivery motor 81 (AC servo motor) is associated with the code bobbin 6 for storing the code 7, and the delivery of the code 7 is performed by rotating the delivery motor 81.

The cord 7 fed from the cord bobbin 6 is wound around a tension roll means 83 through an intermediate roll 82, and is further wound on another intermediate roll 84, first to third guide pulleys 40, 41, and 41. Through 42, the fourth guide roll 43 of the code carrier 31 is reached. In addition, for the second guide pulley 41,
When the code tension exceeds the upper and lower limit values, load cells 45 are provided for stopping the apparatus and managing the code tension to be within a predetermined range.

The tension roll means 83 has a shaft member 85 rotatably supported, and tension rolls 86, 86 rotatably supported at both ends of the shaft member 85 and around which the cord 7 is wound. An oscillating motor 87 (AC servo motor or inverter motor) is associated with the shaft member 85, and the oscillating motor 87 oscillates the tension roll means 83 (shaft member 85) so as to follow the change, thereby reducing the cord tension. Code 7 while maintaining the target value
Is configured to be paid out.

A tachogenerator 88 (or an encoder) as a speed detecting means for detecting the feeding speed of the cord 7 is linked to the intermediate roll 84. The tachogenerator 88 receives a signal from the tachogenerator 88 and controls the feeding control means 48.
Controls the feeding motor 81 based on the feeding speed of the cord so that the change of the feeding speed of the cord 7 can be followed. Further, when the code carrier returns to the initial position after the completion of the winding of the cord, the feeding control means 48 reversely rotates the feeding motor 81 to automatically rewind the surplus cord.

Further, the code bobbin 6 is provided with a code remaining amount detection sensor 49 for optically detecting the presence or absence of a code so as to be adjustable in the radial direction of the code bobbin 6. The signal of the code remaining amount detection sensor 49 is supplied to the feeding control means 48.
To be entered. Delivery control means 48
Read the code information from the magnetic recording means 5 through the reading means 50, and replace the bobbin on the display section of the operation panel (not shown) if the remaining code amount is smaller than the amount required for the code feeding operation before the code feeding operation is started. It also functions as exchange instruction means for outputting a signal and displaying an exchange instruction. Therefore, when the remaining cord amount is smaller than the amount required for the next cord feeding operation, the code bobbin is exchanged as described later based on the exchange instruction on the display section of the operation panel, so that one mold can be formed. On the other hand, the cord can be wound without generating a new joint portion of the cord 7.

As shown in detail in FIG. 2, the code carrier 31 includes a first carrier body 53 having a touch pulley 51 and a cut / clamp unit 52,
The first carrier main body 53 is constantly urged in the forward direction by a spring member 55 interposed therebetween. Therefore, after the touch pulley 51 comes into contact with the mold 1 when the code carrier 31 advances, the code carrier 31 further advances, and the spring member 55 bends by a fixed amount and the first and second carrier bodies 53 and 54 approach each other. Stop. As a result, the touch pulley 51 is applied to the mold 1 at a constant pressure.

The touch pulley 51 is rotatably supported by the first carrier body 53. A turning bracket 56 is rotatably supported on the first carrier body 53, and a cord clamp device 57, a cord presser and a terminal guide roller 58, and a cutter (not shown) are attached to the turning bracket 56. Thus, the cut / clamp unit 52 is configured. The turning bracket 56 is moved by the turning cylinder 59 to the touch pulley 51.
, And approaches or separates from the mold 1. In addition, a positioning rod 61 is provided on the first carrier main body 53 in parallel with the cord clamp device 57 so as to advance and retreat from the mold 1 by the cylinder means 60.

Reference numerals 62 and 63 denote touch pulleys 5 respectively.
Fifth and sixth limit switches for detecting a 10 mm front position and a retreat position in contact with the first mold.

In the code path between the touch pulley 51 and the guide pulley 43 on the code carrier 31, that is, immediately before entering the touch pulley 51, the joint portion of the cord 7 is larger than the cord diameter. A joint detection sensor 64 for detecting is provided, and detects passage of the cord 7 through the joint portion. When a bobbin replacement instruction is displayed on the display unit of the operation panel (not shown), the code bobbin 6 having a small remaining amount is ejected while being guided by a guide member (not shown), and the expired code bobbin 6 is replaced by the guide member. It is newly installed while being guided to. Therefore, a new joint does not intervene in the cord 7 wound around the mold 1.

With the above construction, the lower mold retainer 14 is raised by the cylinder means 20 from below the mold 1, and the upper mold retainer 13 directly connected to the main shaft 15 is also lowered from above. The mold 1 is clamped, and the winding of the cord 7 is started in this state.

First, at the beginning of winding of the cord 7, when the touch pulley 51 reaches a position about 10 mm closer to contact with the mold 1, the fifth limit switch 62 detects that, and the advance of the code carrier 31 is temporarily stopped. At this time, the positioning rod 61 is advanced (a position protruding about 20 mm from the touch pulley 51), and then the advance of the code carrier 31 is restarted. As a result, the positioning rod 61 is first moved to the mold 1.
And the code carrier 31 is 10 mm from there
Stop at the advanced position. Thereafter, the tip of the cord is crimped, and the cord carrier 31 advances again until the touch pulley 51 contacts the mold, and the cord 7 is sequentially wound.

When the cord 7 is wound, the feed control means 48 controls the rotation speed of the feed motor 36 based on the feed speed of the cord so that the change of the feed speed of the cord 7 can be followed.
The code tension added to the code 7 is stabilized.

The end of the winding of the cord 7 is a predetermined distance (about 100 mm) after the rotation of the mold 1 is stopped.
1 moves backward until the sixth limit switch 63 is turned on. Then, after the code terminal processing, the code carrier 31 moves backward to the forward / reverse origin position where the second limit switch 30 is turned on.

Therefore, according to this device, the tension roll means 8 is provided from the beginning of the cord winding for unwinding the cord 7.
3, it is possible to apply a constant tension to the cord 7, and as shown in FIG. 3, even if the rotation speed of the main shaft 15 changes at the beginning or end of winding,
The variation in the cord tension from the start to the end of the winding can be reduced, and can be made substantially constant.

[0030]

According to the present invention, as described above, the tension roll means is rocked by the rocking motor means so that the cord tension is maintained at a substantially constant value, so that the cord tension can be controlled with high precision. can do.

Further, when the code carrier returns to the initial position, the code bobbin is automatically rewound, so that the cord is not loosened.

Further, a code remaining amount detecting means for recording the remaining code amount based on the used code amount is provided, and if the remaining code amount is smaller than the amount required in the code feeding operation before starting the code feeding operation, a bobbin exchange signal is output. Is output, so that it is possible to eliminate the occurrence of a new joint portion of the cord during the winding of the cord.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a cord feeding device according to the present invention.

FIG. 2 is a detailed view around a code carrier.

FIG. 3 is a diagram showing a change in code tension.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mold 5 magnetic recording card 6 code bobbin 7 code 31 code carrier 48 feeding control means 49 code remaining amount detection sensor 81 feeding motor 83 tension roll means 85 shaft member 86 tension roll 87 swing motor 88 tachogenerator

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masatoshi Umemiya 3-2-1-15 Meiwadori, Hyogo-ku, Kobe-shi, Hyogo Inside BANDO CHEMICAL CO., LTD. BANDO CHEMICAL CO., LTD. (72) Inventor Michihiro Takenaka 3-2-1 Meiwa-dori, Hyogo-ku, Kobe, Hyogo Pref. BANDO CHEMICAL CO., LTD. (72) Inventor Naohisa Harushige, Kobe, Hyogo (2-1) Inventor Shoichi Nagai 3-2-1 Meiwadori, Hyogo-ku, Kobe-shi, Hyogo Pref. 7-41253 (JP, A) JP-A-4-292379 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65H 59/00-59/40 F16G 1/00

Claims (3)

(57) [Claims] In a manufacturing process of a transmission rubber belt, a code feeding device for feeding a cord to be sequentially wound while being moved by a code carrier, comprising: a code bobbin means for storing the code; and the code being fed in association with the code bobbin means. A feeding motor, a shaft member rotatably supported, and tension roll means supported on both ends of the shaft member and having a tension roll around which a cord is wound; and a tension roll means associated with the tension roll means. Rocking, rocking motor means for maintaining the cord tension at a substantially constant value, speed detecting means for detecting the feeding speed of the cord after passing through the tension roll means, receiving a signal from the speed detecting means, Based on the payout speed of the cord, the payout mode And a delivery control unit for controlling data. 2. The unwinding control means according to claim 1, wherein when the code carrier returns to the initial position after the winding of the cord is completed, the unwinding control means controls the unwinding motor to rewind the surplus cord to the code bobbin. Cord feeding device. 3. A code remaining amount detecting means for detecting a remaining code amount based on a used amount of the code, the code remaining amount detecting means being associated with the code feeding means; 3. The cord feeding device according to claim 1, further comprising: an exchange instruction unit that outputs a bobbin exchange signal when the remaining cord amount is smaller than an amount required in the cord feeding operation.