JP3243736B2 - Belt cover winding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover winding machine for winding a cover cloth (canvas made of canvas or the like) on the surface of a wrapped V-belt or the like in a manufacturing process thereof. It is about improvement.

[0002]

2. Description of the Related Art A belt cover winding machine wraps the surface of a belt with a belt-shaped cover cloth over one circumference of the belt, and overlaps and joins the ends of the cloth. In order to supply the cover cloth to the cover winding machine that automatically performs such a process, it must be noted that the cover cloth itself has some joints (joints formed by overlapping cloths). Since the cover cloth needs to be a so-called bias cloth in which fibers are obliquely passed while being a long strip-shaped thing, it is difficult to eliminate such a seam (hereinafter referred to as a material seam) in manufacturing, If this material seam overlaps or is too close to the seam between the ends of one circumference wound around the belt (hereinafter referred to as the winding seam), the flexibility and other characteristics of the two seams are close to that of the other parts. This is because it is greatly different, which is not preferable in terms of the quality of the belt.

[0003] Therefore, in the cover cloth supplying portion of the cover winding machine, a position to be cut (cut) at a position to be cut (cut planned position. The end of winding on one belt and the start of winding on the next belt). A device is provided for detecting whether or not there is a material seam immediately before and immediately after the belt is wound around the belt at the boundary of (2).

As such a seam detecting device, Japanese Patent Application Laid-Open No.
Japanese Patent Application Laid-Open No. 2-99099 discloses a technique in which a cover cloth is sandwiched between two plates including a sensor for detecting a thickness. Further, Japanese Patent Publication No. 51-39292 discloses an apparatus for directly detecting a limit switch by applying the limit switch to a cover cloth.

[0005]

The conventional seam detecting device as described above does not always perform reliable detection unless high-quality sensors (including switches) having high precision are used (or used). I was unable to demonstrate my ability. That is, the thickness of the cover cloth is usually 0.5 to 0.5 mm.
The main reason is that it is as thin as 7 mm. In other words, the detection device detects that the thickness of the cloth is doubled at the seam (material seam), but the difference from the non-seam part is 1 m.
Conventionally, false detections are often made for less than m. Another reason for such a disadvantage is that if the difference in thickness is so small, even if there is a slight play in an operating portion or the like, the accuracy is greatly reduced.

In addition, the conventional detecting device cannot detect whether the material seam is located before (from the supply destination) or after the scheduled cut position. When it is at the front, for example, the tip of the cover cloth may be cut off by a predetermined dimension (a) that needs to be provided between the material seam and the winding seam. If only a) is cut off, the material seam cannot be sufficiently separated from the winding seam (this is the same as having a material seam immediately before the planned cut position). However, if it is not possible to detect whether the material seam is located before or after the above-described cut position, the cut amount must be increased (such as always cutting the size (2a)). This leads to an increase in useless cover cloth.

An object of the present invention is to provide a cover winding machine having a seam detecting device which solves the above-mentioned disadvantages, such as exhibiting a high detecting ability without requiring a high-grade sensor.

[0008]

SUMMARY OF THE INVENTION A belt cover winding machine according to the present invention has the following structure as a material seam detecting device in a supply portion of a cover cloth. In other words, a) A cut surface on the cover cloth and a flat surface to which the front and back (the part immediately before and immediately after) are spread and placed are placed in the supply path of the cover cloth, and b) The cut surface is pressed against the cover cloth on the flat surface. The obtained rolling roller is provided in the middle of the swing arm, and the arm supports the base portion with a pin and is mounted on a bracket via a spring. Further, a displacement sensor (for example, between the swinging end of the arm and the bracket) (Proximity switch and limit switch) and c) moving means for moving the bracket in parallel with the roller and swing arm along a flat surface.

In this cover winding machine, it is preferable that, as described in claim 2, d) the moving means of c) be provided with a moving amount detecting means.

[0010]

In the cover winding machine of the present invention, the above-mentioned detecting device detects whether or not there is a material seam before and after the cut scheduled position in the cover cloth supplied to the belt as follows.

1) On the flat surface of the above a), spread the cover cloths including the planned cut position before and after the cover cloth. The "front and rear" portion is defined by a predetermined minimum distance (usually several tens of millimeters to one hundred and several tens of millimeters) or more to be taken between the winding seam and the material seam in the product belt. It is good to take.

2) The rolling roller described in b) is pressed against the cover cloth on the flat surface. As described above, this roller is provided in the middle of the swing arm, and the arm can swing on the bracket around the pin at the base end and while maintaining the restoring position by the action of the spring. Attached to.

3) Using the moving means of c), the bracket is translated along the flat surface. As a result, the roller rolls on the cover cloth on the flat surface (that is, near the cut position), but the swing arm can swing around the pin at the base end, and the roller is in the arm. If the cover cloth has irregularities, the arm will swing.

4) The swing displacement of the swing arm is detected by the displacement sensor of b), and when there is a certain amount of displacement (corresponding to the thickness of the cloth), the displacement is detected there (that is, within the vicinity of the planned cut position). ) Judge that there is a material joint. The roller is in the middle of the arm, and there is a sensor near the swinging end of the arm, away from the base end portion supported by the pin. In this case, the oscillating displacement is amplified. In other words, in the joint detection device of the cover winding machine, the sensor detects not the displacement itself of the roller rolling on the joint but the displacement amplified by the lever ratio of the arm. As a result, reliable detection capability can be achieved without using high-precision sensors.

5) If it is found that there is a material seam near the scheduled cut position, the cover winding machine cuts off a suitable amount of the tip of the cover cloth from the position of the wound seam (corresponding to the planned cut position). Keep material seams apart.

According to a second aspect of the present invention, when the displacement sensor detects a certain amount of swing displacement of the swing arm corresponding to the seam of the cover cloth, the movement amount (position) of the bracket at that moment is determined by the d. ). This moving amount does not deviate from the position indicating the position of the roller rolling on the cover cloth. As a result, it can be determined whether the material seam detected in the above 4) is located before or after the scheduled cutting position. The present cover winding machine can take appropriate measures such as minimizing waste of the material by cutting off the cover cloth or the like according to the result.

[0017]

1 to 3 show one embodiment of the present invention. FIG.
2 and FIG. 2 are a front view and a bottom view (a view taken along the line II-II in FIG. 1) of the main part of the cover winding machine 1, that is, the material seam detection device 10 in the supply portion of the cover cloth A. FIG. 3 is a front view showing substantially the entire cover winding machine 1.

The cover winding machine 1 is a facility for covering a surface of an unvulcanized V-belt B hung on a pair of pulleys 2.3 with a cover cloth A made of canvas as shown in FIG. The lower pulley 3 of the pulleys 2 and 3 for hanging the belt B
The position can be changed up and down as indicated by the imaginary line in the drawing, so that the belt B can be easily applied to the upper pulley 2 and an appropriate tension can be applied to the applied belt B. The front end of the cover cloth A is attached to the belt B, which is tensioned by being pulled between the pulleys 2 and 3, from the outside, and then the belt B is circulated by turning the pulleys 2.3. The cover cloth A is also pulled out along with the circulation of the belt B, and the cover cloth A is wound around the entire surface of the belt B by the rolls 4.4a and the like. Cover cloth A is pulled from the left side of the drawing to pulley 9 or roll 7
And supply via In the drawing, reference numeral 5 denotes a leaf spring stopper for preventing the cloth A from returning, and reference numeral 6 denotes a cutting blade for cutting the cloth A.

The ends of the cover cloth A wound around the circumference of the belt B are overlapped by several millimeters to ten and several millimeters to form a winding seam. The seam is originally provided in the strip-shaped cover cloth A. It must be separated from the material seam J (see FIG. 1) by at least the specified dimension a. Therefore, in the cover winding machine 1, the material seam J is located at the front and rear portions within the range of the dimension a from the scheduled cutting position serving as the winding seam (that is, the position where the belt B is to be cut when the next winding of the belt B is completed). Seam detection device 1 for detecting whether there is
0 is arranged. Hereinafter, the device 10 will be described.

The joint detecting device 10 mainly includes a main body shown in FIGS. 1 and 2 and a position adjusting part shown in FIG. As described later, the main body portion has a material seam J within a certain distance range (within a dimension 2a) on the cover cloth A.
The position adjustment portion has a function of adjusting the position of the range to be detected so as to match the next cut scheduled position on the cover cloth A. That is, the position adjusting portion is a vertical guide rod 27 as shown in FIG.
(There are two on the front side and the other side), a long synchro belt 28 hung in parallel with them, and a driving means (not shown) for the same. At 24a, the guide rod 27 is engaged with the guide rod 27 so as to be able to move up and down, and is fixed to a part of the belt 28 by an engaging portion 24b. When the belt 28 is driven, the base 24 moves up and down along the guide rod 27 together with the main body of the apparatus 10.

The main body of the seam detecting device 10 is shown in FIGS. 1 and 2 and is constructed as follows. First, a flat plate is stuck on the base 24 which is a part of the supply path of the cover cloth A to form the vertical flat surface 11. The detection target portion of the cover cloth A is spread on the flat surface 11,
The presence or absence of the material seam J is checked by a rolling roller 12 described below. Therefore, the length of the flat surface 11 in the vertical direction is at least twice the dimension a. In order to extend the cover cloth A and spread it, the blade 7 is attached to the roll 7 described above (FIG. 3).
At the same time, the compressed air outlet 8 is provided so as to turn the roll 7 in the reverse direction of the cloth A.

As shown in FIG. 1, the roller 12 is mounted near the upper and lower centers of a swing arm 13 supported by a pin 14 near the base end of the upper part.
Is provided on the bracket 16 so as to be able to swing through, and is urged to the left in the figure by the compression spring 15. Since the head of the bolt 18 protrudes from the upper part of the bracket 16 to serve as a stopper, the arm 13 is restored only to the right (counterclockwise around the pin 14) from the state shown in FIG. Swing as possible. Pin 14
Since the bearing 14a is fitted between the arm and the bracket 16 as shown in FIG. 2, the swing of the arm 13 is extremely smooth. A proximity switch 17 for detecting approach near the swinging end of the arm 13 is provided near the lower end of the bracket 16.
Is mounted as a displacement sensor. In the arm 13, the dimension from the portion facing the switch 17 to the pin 14 is exactly twice the dimension from the roller 12 to the pin 14 (that is, the lever ratio is 2: 1). Then, the bracket 16 provided with the roller 12 and the arm 13 as described above is incorporated into the moving frame 19 via the horizontal guide rod 21 and the air cylinder 20, and the roller 12 can be moved horizontally so as to be flat. 1
1 so that it can be contacted and separated.

The vertical track 22 is fixed on the base 24 provided with the flat surface 11, and the moving frame 19 is slidably engaged with the track 22 via a slide base 19a. With the telescopic end 25a. The cylinder 25 is disposed vertically with its base stopped on the base 24. By doing so, the frame 19
Can move reciprocally in the vertical direction by using the track 22 and the cylinder 25 as moving means together with the rolling roller 12, the swing arm 13, the bracket 16, and the like. The expansion / contraction stroke of the cylinder 25 is twice (2)
a) above. On the outside of the cylinder 25, the movement amount of the bracket 16 and the like is detected by knowing the piston position at a total of four points, that is, a center point of the stroke, two points vertically separated from it by a distance a, and a lowermost point. A magnet sensor 26 (only three of the four are shown) is provided.

The seam detecting device 1 constructed as described above
0 is the height of the main body portion by the position adjustment portion so that the upper and lower center points X of the flat surface 11 come to the next cut scheduled position on the cover cloth A (this position is constant unless the type of the belt B is changed). Is set, it is detected as follows whether or not the material seam J is present on the cover cloth A in the vicinity of each cut scheduled position.

1) When the belt B completes one rotation and the cover cloth A is wound around its surface, the belt B is removed and the flat belt 11 is placed on the flat surface 11 until the next belt B is set. As shown in FIG. 1, as shown in FIG. 1, the planned cut position is overlapped with the center point X, and the front and rear cover cloths A are spread. Since the vicinity of the lower end is stopped by the stopper 5 and the roll 7 is rotated in the reverse direction by the action of the blade 7a and the air, the cloth A
Is stretched on the flat surface 11 without wrinkles or slack.

2) By extending the air cylinder 20, the bracket 16 and the like are moved to the left in FIG.
The rolling roller 12 is pressed against the upper cover cloth A. At this time, the cylinder 20 is extended to a certain position (stroke end), and the spring 15 is slightly contracted.

3) The frame 19 including the rollers 12 and the bracket 16 is translated upward along the track 22 by contracting the air cylinder 25. As a result, the roller 12 rolls on the cover cloth A on the flat surface 11, and if there is a material seam J on the cloth A, the roller 12 is displaced rightward in the figure to swing the swing arm 13 counterclockwise. .

4) If the swing displacement of the swing arm 13 is equal to or more than a predetermined amount, the proximity switch 17 is turned on, and the cover cloth A falls within the range of the dimension 2a sandwiching the center point X, which is the next scheduled cutting position. Signals that there is a material seam J at home. If the thickness of the cloth A is, for example, 0.6 mm, the roller 12 is displaced by only 0.6 mm when it goes over the seam. As a result, a displacement of about 1.2 mm occurs in the arm 13 at the position of the switch 17. Accordingly, the presence of the material seam J is detected by the switch 17 without error.

5) Since the four magnet switches 26 detect the telescopic positions of the air cylinder 25, the above 4)
Roller 12 when switch 17 is turned on as shown in FIG.
Is within the dimension a below the center point X of the flat surface 11 (before, ie, from the tip) or above (behind)
Can be known within the dimension a.

When the seam detecting device 10 detects the presence of the material seam J by the above 1) to 5), the cover winding machine 1 operates as follows. For example, when it is determined that there is an existing seam J immediately before the next cut scheduled position (within a dimension a below the center point X), the leading end of the cover cloth A is extended by the length a before the cover is wound around the next belt B. By cutting, the position of the seam J is shifted from the planned cutting position. In addition, immediately after the next scheduled cutting position (upper dimension a
If there is a seam J in (inside), after the cover is wound around the next belt B (and the cloth A is cut), the portion coming to the front end is cut off by the length a. In each case, in order to pull out the cloth A beyond the cutting blade 6 (FIG. 3) by a length a for cutting, in this example, the tip of the cloth A is
And pulleys 2 and 3 are turned. In addition, for the belt B with the cover wound, pulleys 2.3
After removing the tension by reducing the distance between them, remove them and send them to a vulcanizer (not shown).

[0031]

In the cover winding machine according to the present invention, the displacement of the roller rolling on the cover cloth is amplified by the swing arm, and the amplified displacement is detected by the sensor, so that the cover can be used without using a high-grade sensor. Detection of a material seam on the cloth is performed with high accuracy.

According to the cover winding machine of the second aspect, since it is possible to know whether the material seam is immediately before or immediately after the cut scheduled position, it is possible to take an optimal treatment according to each case.

[Brief description of the drawings]

FIG. 1 is a front view showing a material seam detection device 10 in a supply portion of a cover cloth A in a cover winding machine 1 according to an embodiment of the present invention.

FIG. 2 is a view of the detection device 10 of FIG.
II-II view).

FIG. 3 is a front view showing almost the entire cover winding machine 1;

[Explanation of symbols]

 Reference Signs List A cover cloth B belt 1 cover winding machine 2.3 pulley 10 seam detecting device 11 flat surface 12 rolling roller 13 swing arm 14 pin 15 spring 16 bracket 17 proximity switch (displacement sensor) 25 air cylinder (part of moving means) 26 Magnet switch (movement amount detection means)

Continuation of the front page (56) References JP-A-62-299099 (JP, A) JP-B-51-39292 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16G 1 / 00-9/02 B26D 5/00-5/26 B29D 29/00-29/10

Claims (2)

(57) [Claims] 1. A cover winding machine for winding a cover cloth on a surface of a belt, wherein a cut surface on the cover cloth and a flat surface to which the front and rear sides of the cover cloth are spread are arranged in a supply path of the cover cloth. A rolling roller that can be pressed against the upper cover cloth is provided in the middle of the swing arm, and the arm supports the base end portion with a pin and is mounted on a bracket via a spring. And a moving means for moving the bracket in parallel with the roller and the swing arm along the flat surface. 2. The belt cover winding machine according to claim 1, wherein said moving means is provided with a moving amount detecting means.