JP5589375B2 - Conductor detection sensor and conductor detection method - Google Patents

Description

The present invention relates to a sensor for detecting a conductor protruding from a cut surface of a sheet-like member embedded with a conductor such as a metal wire, and a detection method thereof.

A tire rubber (belt) sheet is a continuous belt-like sheet-like member in which a large number of metal wires such as steel cords are embedded in parallel to each other at a certain angle at the initial stage of production of a tire. In a later stage of tire manufacture, the rubber sheet is cut into a fixed length, and the cut rubber sheet is wound around a molding drum and joined. This fixed length cutting is performed, for example, with a ring cutter or the like along an embedded steel cord. However, if the wave and angle change of the embedded steel cord is large, the steel cord is exposed or jumps out on the cut surface after cutting. In extreme cases, the protruding steel wire rides on the top surface of the rubber sheet.

FIG. 10 is a schematic view showing a state in which the rubber sheet is cut by moving it with a conveyor belt. FIG. 10A is a plan view of the conveyor device 101 on which the rubber sheet 103 is placed as viewed from above. FIG. 10B is a side view of the conveyor device 101 on which the rubber sheet 103 is placed. It is the figure seen so that cut surface 104S, 104B may become a straight line from the direction. The rubber sheet 103 is a long belt-like rubber sheet that is carried by the conveyor belt 102 of the conveyor device 101 and cut by a ring cutter. Since the belt-like rubber sheet 103 is usually cut along the steel cord, the rubber sheet 104 after cutting has a parallelogram shape as shown in FIG. That is, the cut surfaces 104S and 104B of the rubber sheet 104 are inclined at a constant angle with respect to the longitudinal direction of the rubber sheet 104.

The cutter comes into contact with a steel cord embedded when cutting the rubber sheet 103 (a metal wire or a conductive member that is not limited to a metal wire is also referred to as a wire, a conductive wire, or a conductor), and the wire is cut or torn. Thus, as shown in FIG. 10, the wires 106 and 107 may be exposed and jump out. If the extent of the protrusion is large, as shown in FIG. 10B, the protruded wire 106 wraps around the upper surface of the rubber sheet 104 near the cut surface, or the protruded wire 107 extends in the lateral direction of the cut surface (rubber sheet). Or forward or backward in the direction of movement. (The protruding wire is also referred to as a protruding wire.)

When a rubber sheet (such as 104) with a wire exposed from such a cut surface is wound around a molding drum and joined, other rubber members and steel cord may touch directly, or the steel cord and steel cord may overlap. There is a risk of separation during use. In extreme cases, it can cause bursts while the car is running.

In order to solve these problems, it is important to detect whether or not a metal wire protrudes from the cut rubber sheet before joining the cut rubber sheet with the molding drum. As an apparatus for detecting such an exposed metal wire, the device proposed in Patent Document 1 is used. In this detection apparatus, two comb-shaped electrode plates are made parallel to contact with a rubber sheet member. The rubber sheet mounted on the belt conveyor is moved while contacting the electrode plate. FIG. 11 is a diagram for explaining the conventional conductor detection sensor disclosed in Patent Document 1. If there is an exposed metal wire, as shown in FIG. 11, two electrode plates 124a and 124b are made of metal. Since the wire 122 is in contact, a current flows by being short-circuited by the exposed metal wire to which the electrode plate to which a voltage is applied is exposed. As a result, it can be detected whether or not the metal wire 122 is exposed. In FIG. 11, since the electrode plates 124a and 124b are insulated by the insulating plate 125, normally no current flows. In the normal rubber sheet 120, the metal wire 122 is embedded in the insulating member 121.

However, the above comb-like electrode has a complicated structure and shape, and its production takes a lot of time and cost. In addition, in the method proposed in Patent Document 1, since the comb-like electrode is brought into contact with the moving rubber sheet, or the comb-like electrode moves on the rubber sheet, the dust adhered to the rubber sheet. In some cases, even if there is an exposed metal wire, it may not be detected. Therefore, it is necessary to periodically and frequently clean the comb-like electrode, which requires maintenance costs. Moreover, in order to improve the contact property, it is necessary to press the comb-like electrode with a large force. Therefore, the rubber sheet is damaged or the tip of the comb tooth is bent, and the comb-like electrode serving as a sensor is damaged. Therefore, there is a problem that the replacement frequency of the sensor is large. Furthermore, the exposed metal wire is wound around the comb teeth, which causes a problem that the detection device is destroyed or the rubber sheet is damaged.

JP-A-2-228547

An object of the present invention is to provide a conductor detection device (sensor) such as a metal wire that can be easily manufactured at a low production cost, solves the above problems, and provides a sensor having a long life. It is.

Uses a sensor in which a plurality of conductive wires are wound around a sensor body (sensor head) that is an insulator in parallel at equal intervals to detect the presence or absence of a conductor (hereinafter referred to as a wire) that protrudes from the cut surface of the rubber sheet. To do. A voltage is applied to the plurality of electric wires wound around the sensor, but electricity does not flow because the plurality of electric wires are not connected in a normal state. This sensor is brought into contact with or close to the upper surface in the vicinity of the cut surface of the rubber sheet. If the wire protrudes to the upper surface side, the wire contacts between the plurality of electric wires of the sensor, and thus electricity flows between these electric wires. Moreover, this sensor is brought into contact with or close to the conveyor belt on the end face side of the rubber sheet cutting surface. If the wire protrudes to the side of the cut surface, the wire contacts between the plurality of electric wires of the sensor, and electricity flows between these electric wires.

Normally, electricity does not flow between a plurality of electric wires, so that it is possible to detect whether or not a protruding wire exists by monitoring the current or resistance between the plurality of electric wires.
Since the jump-out wire is detected by a simple direct method called a contact method, the sensitivity is high and there are few false detections. Since it is a simple sensor in which a plurality of electric wires are wound around an insulator at equal intervals, it is easy to manufacture. General-purpose materials can be used with few components. Therefore, the manufacturing cost is very low. Further, since the contact is merely made, the consumption of the members is small, and the adhesion of dust and debris is also small. In addition, only the electric wires are in contact with the popping wire, the rubber sheet, and the conveyor belt, and the sensor body (sensor head) is hardly consumed, so that it can be used semipermanently. In the method shown in FIG. 10, there is a concern about the winding of the jumping wire around the sensor, but there is almost no such concern, and there is no damage to the sensor. If the wire can no longer be used, it is only necessary to replace it, and the replacement time is short and the replacement cost is low.

FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a diagram for explaining the principle of conductor detection of the sensor of the present invention. FIG. 3 is a diagram illustrating a sensor according to the present invention in which grooves are formed. FIG. 4 is a plan view of the belt conveyor, to which the conductor detection sensor of the present invention is attached, viewed from above. FIG. 5 is an elevation view of a belt conveyor equipped with the conductor detection sensor of the present invention. FIG. 6 is a diagram illustrating an operation method for detecting a wire jumping out from a rubber sheet using the sensor of the present invention. FIG. 7 is a diagram illustrating an operation method for detecting a wire jumping out from a rubber sheet using the sensor of the present invention. FIG. 8 is a diagram illustrating a bottom surface of a sensor head of a sensor in which an electric wire is wound obliquely. FIG. 9 is a diagram showing a cylindrical sensor of the present invention and its operation. FIG. 10 is a schematic view showing a state in which the rubber sheet is cut by moving it with a conveyor belt. FIG. 11 is a diagram illustrating a conventional conductor detection sensor.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a diagram showing an embodiment of a sensor according to the present invention, and a sensor 10 shown in a perspective view includes a sensor head 11, conductive wires 12, 13, terminal electrodes 14, 15 and a detection circuit. Has been. The sensor head shape of the embodiment shown in FIG. 1 is a horizontally long rectangular parallelepiped shape. In FIG. 1, the sensor head surface 11a on the front side is a surface in contact with the rubber sheet. Since this surface is usually on the lower side, it is called the bottom surface of the sensor head. Two electric wires 12 (shown by a thick practice) and 13 (shown by a thick broken line) are wound approximately parallel to each other around a horizontally long rectangular parallelepiped sensor head 11. That is, the two electric wires are wound substantially parallel to the sensor head bottom surface 11a with a certain angle α with respect to the longitudinal direction of the sensor head. (In FIG. 1, the wound wire is shown only halfway for easy viewing, but is actually wound around the entire sensor head 11 in the region necessary for detecting the jumping wire.) In addition, the sheet-like member described in this specification is a plate-like member, and the surface of the sheet has an insulating property. In addition, there are some that are flexible such as a rubber sheet for a tire, and others that are difficult to bend. The term rubber is used in consideration of tire use, but more generally a polymer material (polymer), that is, a resin may be used, and rubber may be replaced with a resin. Furthermore, not only resin but ceramic, metal oxide, and wood can be applied to the present invention.

Both ends of the two electric wires are connected to terminal electrodes attached to the lateral surfaces 11b and 11c of the sensor head. That is, both ends of the electric wire 12 are connected to the terminal electrode 14b on the side surface 11b and the terminal electrode 14c on the side surface 11c. Both ends of the electric wire 13 are connected to the terminal electrode 15b on the side surface 11b and the terminal electrode 15c on the side surface 11c. A detection circuit is formed between the terminal electrode 14 and the terminal electrode 15, and it can be detected if a conductor such as a metal wire comes into contact between the two electric wires. For example, as shown in FIG. 1, a voltage (indicated by V) is applied between the terminal electrode 14c and the terminal electrode 15c. Normally, no current flows between the wires 12 and 13, but if a conductor touches the two wires 12 and 13 somewhere, current flows between the wires 12 and 13, so that current (Indicated by A in FIG. 1), it can be detected whether or not the conductor is in contact.

As is clear from the above, the sensor head is made of an insulating material. For example, nylon, acrylic, polycarbonate, insulating polymer resin such as PET and silicone resin, and ceramic. A conductive material may be coated with an insulator. Since the electric wire is a conductive material and the surface only needs to be conductive, an insulator coated with a conductor may be used. Of course, the conductor may be plated with metal.

The sensor head bottom surface 11a is a flat surface, and the entire sensor head bottom surface is in contact with the rubber sheet or the conveyor belt evenly. (The actual contact is the two wires wound on the bottom surface of the sensor head, and it is desirable that the thickness (diameter) of the wires is uniform throughout. The thickness is the diameter of the electric wire.) The sensor head shown in FIG. 1 has a rectangular parallelepiped shape, but if the surface on the side in contact with the rubber sheet (bottom surface of the sensor head) is flat, the surface that does not contact the rubber sheet It does not have to be flat. For example, the cross section may be a curved surface such as a cylinder. For example, the sensor head may have a shape obtained by cutting a cylindrical shape in the vertical direction (perpendicular to the circular surface) (the cut surface is a flat surface). Further, the sensor head may be a triangular prism or a polygonal prism. (In this case, one side (flat surface) is the surface on the contact side with the rubber sheet.) In FIG. 1, although there are two electric wires, there is no need for two electric wires, and there are three electric wires. But more than that. That is, a plurality of electric wires can be used. In that case, a plurality of wires are wound, but it is necessary not to contact each other. In particular, adjacent wires should not touch or cross each other, and normally no current should flow between the wires. In addition, since a conveyor belt and a rubber sheet are insulators, even if the electric wire of a sensor contacts, an electric current does not flow between adjacent electric wires.

FIG. 2 is a diagram showing a sensor head bottom surface 11a which is a surface on the contact side with the rubber sheet, and is a diagram showing a principle of detecting a conductor of the sensor of the present invention. In FIG. 2, the winding state of the two electric wires 12 and 13 and the contact state between the conductor (hereinafter referred to as a wire) 19 and the electric wire are shown so that they can be clearly understood. The two electric wires are wound around the sensor head surface 11a with an angle α. The electric wire 12 is connected to 12-2, 12-2, 12-3, and further 12-4. In addition, the electric wire 13 is connected to 13-2, 13-2, 13-3, and further 13-4. The two wires 12 and 13 do not cross or touch at any part.

If the thickness (diameter) of the two wires 12 and 13 is x and y, respectively, and the interval between the two wires 12 and 13 is z, the pitch p of the two wires 12 and 13 is (x + y) / 2 + z. Become. That is, the two electric wires 12 and 13 are wound with a pitch p on the sensor head bottom surface 11a. Although it is desirable that the pitch p is the same for the entire sensor head bottom surface 11a, if the two wires 12 and 13 do not cross or contact each other in the middle, no current flows between the two wires 12 and 13 in a normal state. The pitch p may vary somewhat. That is, winding a plurality of electric wires in a substantially parallel manner means that a plurality of electric wires are wound with the pitch p slightly varied, that is, at substantially equal intervals (substantially at equal intervals) without crossing or contacting the plurality of electric wires. That is. However, if the variation of the pitch p is large, the variation of the contact rate with respect to the length of the protruding wire becomes large, so that the detection sensitivity is deteriorated.

Consider a case where a wire comes into contact with the sensor head bottom surface 11a and somewhere in the wires 12 and 13. For example, as shown in FIG. 2, when the wire 19 contacts the wires 13-1, 12-2 and 13-2, the wires 13-1 and 12-2 and the wires 12-2 and 13-2 are Since it is short-circuited, a current flows between the electric wires 12 and 13, and the presence of the wire 19 can be detected.

In the sensor head bottom surface 11a shown in FIG. 2, the distance between the wires 12 and 13 (the center of the wire 12 and the center of the wire 13) on the lower side (sensor head longitudinal side surface 11f side) or the upper side (sensor head longitudinal side surface 11d side). When the distance is r, there is a relationship of p = rsin α. Although 0 degree <α <90 degrees, as can be seen from this equation, the pitch p can be reduced by reducing α and winding the wire more inclined. Therefore, even a very short wire can be detected. However, since the length of the sensor head in the longitudinal direction is finite (it is optimal that it is slightly longer than the length of the cut surface of the rubber sheet), there is a lower limit of α, so there is a lower limit of the pitch p. Also, a shorter wire can be detected by reducing the distance r between the two electric wires 12 and 13.

However, if the pitch p is too small, the possibility that the adjacent wires will come into contact with each other increases, so that an interval is required so that the two wires do not cross or come into contact with each other. As a method of making z very small, a method of covering the periphery of the wires 12 and 13 with an insulator is effective. In this case, since the two covered electric wires may be brought into contact with each other and wound in parallel, the thickness of the covering insulator (the sum of the thicknesses of the two insulating wires) becomes z. In addition, when using such a covered electric wire, it is needless to say that it is necessary to remove the insulator on the contact surface side with the rubber sheet of the electric wire wound on the bottom surface of the sensor head.

When the surface of the sensor head around which the electric wire is wound (for example, the sensor head bottom surface 11a) is flat, the pitch p may fluctuate due to slipping or loosening of the wound electric wire. When p varies, the detection efficiency changes (decreases). In extreme cases, adjacent wires touch or cross. When contact or crossing, electricity always flows between the two wires, so it does not function as a sensor. As a method for preventing these, if a groove is formed along the portion where the electric wire is wound on the surface of the sensor head 11 (for example, the sensor head bottom surface 11a), the electric wire is inserted into the groove and wound around the sensor head, Is less likely to move, and detection reliability can be improved.

FIG. 3 is a view for explaining a sensor of the present invention in which a groove is formed, and FIG. 3A is a side view of the sensor shown in FIG. (The sensor head bottom surface 11a is down and viewed from the side surface 11d side.) Since the sensor head bottom surface 11a is flat, the wires 12 and 13 have their respective thicknesses from the sensor head bottom surface 11a (the side in contact with the rubber sheet) ( (Diameter) Projected by x and y. Since the sensor head bottom surface 11a (to be precise, the electric wires 12 and 13) is in contact with the rubber sheet or the conveyor belt or detects the contact property of the wires, the sensor head bottom surface 11a must be at the same height, that is, x and y It is desirable to be equal. Further, the materials of the two electric wires 12 and 13 may be different as long as they have electrical conductivity. However, it is desirable that the materials are the same in terms of the degree of wear of the material and ease of handling. In the side surface 11d of the sensor head in FIG. 2 (a), the wires 12 and 13 are wound substantially perpendicular to the longitudinal direction of the sensor head 11, but this is to prevent the wires from moving as slippery as possible. It is. If the sensor head does not move too much, the side surface of the sensor head may be wound obliquely. The same applies to the opposite side surface 11f and the opposite surface (upper surface) 11e of the sensor head bottom surface 11a.

FIG. 3B shows a case where grooves 16 and 17 are formed in the sensor head bottom surface 11a, and the electric wires 12 and 13 are inserted into the grooves 16 and 17, respectively, and wound. If the groove depths of the grooves 16 and 17 are h and k, respectively, the wire 12 protrudes from the sensor head bottom surface 11a by xh, and the wire 13 protrudes from the sensor head bottom surface 11a by yk. ing. Since the contact state of the wire is detected, the electric wires 12 and 13 need to protrude from the sensor head bottom surface 11a, so x> h and y> k. Since it is desirable that the heights of the electric wires 12 and 13 are the same, it is preferable that x = y and h = k. It is easier to form grooves with the same depth from the surface to be manufactured. The above describes the case where the wire is in contact with the bottom of the groove. However, if the width of the groove is smaller than the width of the wire, the wire does not contact the bottom of the groove even if the wire is wound in the groove. In some cases. In this case, the above relationship may not be established. Even in such a case, if the cross section of the electric wire is substantially circular, a part of the lower portion of the electric wire enters the groove, and the electric wire can be fixed to some extent. However, since the fixing of the electric wire is ensured when the electric wire is brought into contact with the bottom of the groove, it is more preferable to have a groove width that can contact the electric wire with the bottom of the groove.

In FIG. 3B, the groove is formed only on the sensor head bottom surface 11a. However, the groove may be formed on other surfaces of the sensor head (side surfaces 11d and 11f, upper surface 11e). By fitting the electric wire in such a groove, the movement of the electric wire can be suppressed. The depth of the grooves other than the sensor head bottom surface 11a may be larger than the thickness (diameter) of the electric wire. In other words, it is because the contact of the wire is not detected with the electric wire wound other than the sensor head bottom surface 11a. In other words, in order to eliminate the case where the electric wire is accidentally brought into contact with various conductive materials, the depth of the grooves other than the sensor head bottom surface 11a is made larger than the thickness of the electric wire, and the head of the electric wire is placed on each surface. It is desirable not to go outside.

FIG. 3C is a view showing a state in which grooves 16 and 17 are formed in the sensor head bottom surface 11a, and the electric wires 12 and 13 are put in the grooves and wound. The grooves 16 and 17 are formed with an angle β with respect to the longitudinal direction of the sensor head. An electric wire is put into the oblique groove and wound around the sensor head 11. That is, the electric wire 12 is wound in the groove 16. Similarly, the electric wire 13 is put into the groove 17 and wound. When the electric wire is brought into contact with the bottom of the groove, if the groove width is made slightly larger than the electric wire width, the electric wire can be reliably put into the groove and easily wound. (The electric wire width described here does not necessarily coincide with the maximum width (diameter) of the electric wire, but refers to the maximum value of the contact width when the electric wire contacts the side surface of the groove.) There is a possibility that the electric wire moves a little inside, but since the lateral movement is restricted by the side surface of the groove, the electric wires do not cross or come into contact with each other. However, it goes without saying that the groove width should not be formed larger than necessary.

In FIG. 3B, the shape of the groove is described as having a rectangular cross section, but various shapes can be used even when the bottom of the electric wire contacts the groove. For example, a groove having a trapezoidal shape or a side surface having a polygonal shape and a side surface and / or a bottom surface having a curved surface shape may be used. Moreover, if the groove shape is matched to the shape of the electric wire and the electric wire fits snugly, for example, if the cross-sectional shape of the electric wire is circular, the cross-section conforming to the circular shape may be a circular groove. Even when the bottom of the electric wire does not contact the groove, the groove can have various shapes. For example, the cross section can be triangular. In this case, there is an advantage that the groove can be easily formed.

In FIG. 3 (a), only one side surface is shown for easy understanding of the arrangement of the electric wires, and the inner side is not shown. Therefore, the electric wires on the inner side of the sensor head bottom surface 11a are not shown. Then, the positional relationship of an electric wire is demonstrated. Two electric wires 12 and 13 are wound around the sensor head 11 in parallel. One end of the electric wire 12 is connected to the electrode terminal 14b on the lateral side surface 11b of the sensor head, passes through the longitudinal side surface 11f (opposite surface of 11d) of the sensor head, and is connected to A21 through the sensor head upper surface 11e. A21 travels along the longitudinal side surface 11d of the sensor head and is connected to A11. A11 travels along the sensor head bottom surface 11a and further travels along 11f and 11e to A22. A22 travels along the longitudinal side surface 11d of the sensor head and is connected to A12. By repeating this, the electric wire 12 is wound along the surface of the sensor head, and the other end of the electric wire 12 is connected to the electrode terminal 14c on the side surface 11c of the sensor head.

Similarly, for the electric wire 13, one end of the electric wire 13 is connected to the electrode terminal 15b on the lateral side surface 11b of the sensor head, passes through the longitudinal side surface 11f (opposite surface of 11d) of the sensor head, and travels along the upper surface 11e of the sensor head. Leads to. B21 travels along the longitudinal side surface 11d of the sensor head and is connected to B11. B11 travels along the sensor head bottom surface 11a, and further travels along 11f and 11e to B22. B22 travels along the longitudinal side surface 11d of the sensor head and is connected to B12. By repeating this, the electric wire 13 is wound along the surface of the sensor head, and the other end of the electric wire 13 is connected to the electrode terminal 15c on the side surface 11c of the sensor head.

Even when no groove is formed on the sensor head bottom surface 11a, the lateral displacement of the electric wires can be considerably prevented by forming grooves on part or all of the other surfaces 11d, 11e and 11f other than the sensor head bottom surface 11a. It is effective for contact and intersection of electric wires. The wires wound around the sensor head bottom surface 11a should have the same height for detecting the jumping wire. Therefore, when forming a groove on the sensor head bottom surface 11a, it is better to make the groove sizes as uniform as possible, so care must be taken in manufacturing the groove. On the other hand, the groove formed on the surface other than the sensor head bottom surface 11a does not need to be very accurate. Therefore, forming the groove on the other surface without forming the groove on the sensor head bottom surface 11a has an advantage that the sensor can be easily manufactured while suppressing the lateral displacement of the electric wire.

In this way, the electric wires 12 and 13 are wound almost in parallel while being in close contact with each surface of the sensor head 11, so that they do not cross or contact each other, and the electrode terminals 14 (14b and / or 14c) and Even if a voltage is applied between the electrode terminals 15 (15b and / or 15c), no current flows. As shown in FIG. 3 (b) and FIG. 3 (c), if a groove is formed on the bottom surface of the sensor head or the other surface of the sensor head and the electric wire is fitted, the position of the electric wire can be fixed and the movement can be suppressed. The possibility of two wires crossing or touching each other is almost eliminated.

Next, a method for detecting a jumping wire using the sensor of the present invention will be described.
FIG. 4 is a schematic view (plan view) of the belt conveyor, to which the conductor detection sensor of the present invention is attached, viewed from above. The rubber sheet 22 is conveyed in the direction of the arrow W by the conveyor belt 21, and is cut as a cutting line 25 by a cutter (not shown) attached to the cutter mounting machine 28, so that a parallelogram-shaped rubber sheet 23 is produced. The Since the rubber sheets 22 and 23 have one flat surface fixed to the conveyor belt 21 (for example, the rubber sheet is attached by a magnet attached to the conveyor belt), the positions of the rubber sheets 22 and 23 do not change even if they are cut. There is little or no rubber sheet misalignment during transportation. A sensor mounting arm 29 is attached to the cutter mounting machine 28. A sensor elevating cylinder 27 is disposed on the arm 29, and the conductor detection sensor 26 of the present invention is attached to the cylinder 27. The wire jumping state of the cut surface is detected. The conductor detection sensor 26 has a rectangular parallelepiped shape in the direction of the cut surface so that the entire cut surface can be covered so that the entire cut surfaces 23S and 23B of the rubber sheet can be detected all at once.

5 (a) and 5 (b) are front views (elevated views) of the belt conveyor to which the conductor detection sensor of the present invention shown in FIG. 4 is attached. FIG. 5A is a view of the longitudinal direction of the conductor detection sensor 26 as seen from the front. FIG. 5A is also a view of the cut surface 23S or 23B of the cut rubber sheet 23 as viewed from the front, and the front end side (the front side in the moving direction of the rubber sheet 23) cut surface 23S or the rear side of the rubber sheet 23. The sensor 26 is disposed along the end surface (the rear side in the moving direction of the rubber sheet 23) along the cut surface 23B. FIG. 5B is a view of the side surface of the conductor detection sensor 26, that is, the direction perpendicular to the longitudinal direction of the conductor detection sensor 26 as viewed from the front. Further, FIG. 5B is a view of the cut surface 23S or 23B of the cut rubber sheet 23 as viewed from the front, and the sensor 26 is disposed above the rear end side cut surface 23B of the rubber sheet 23. ing.

The sensor 26 can be moved up and down by a sensor elevating cylinder 27, and the sensor 26 is cut by contacting or approaching the upper surface of the rubber sheet 23 on the cut surface (23S or 23B) of the rubber sheet 23. A wire jumping out from the surface 23 and riding on the upper surface of the rubber sheet 23 can be detected. Further, the sensor 26 comes into contact with the upper surface of the conveyor belt 21 in front of or behind the cut surface (23S or 23B), and the cut surface (23
S or 23B) can be detected.

6 and 7 are diagrams showing an operation method for detecting a wire jumping out from a rubber sheet using the sensor of the present invention. The basis of the method is to detect the wire by bringing the bottom surface of the sensor head into contact with the cut surface edge of the rubber sheet, and detecting the wire by bringing the sensor head into contact with the conveyor belt near the cut surface of the rubber sheet. It is. FIG. 6 is a diagram illustrating a state in which a wire is detected by bringing the bottom surface of the sensor head into contact with the edge of the cut surface of the cut rubber sheet 23. FIG. 7 is a diagram illustrating a state in which a wire is detected by bringing a sensor head into contact with a conveyor belt near the cut surface of the rubber sheet.

FIG. 6A is a plan view, and is drawn through so as to understand the positional relationship. The sensor 26 is substantially parallel to the edge of the rubber sheet cutting surface 23S or 23B, and is arranged such that the bottom surface of the sensor head is in contact with the entire edge and the upper surface of the rubber sheet near the edge. By doing so, it is possible to detect the presence or absence of a wire that protrudes from the cut surface of the rubber sheet and protrudes from the upper surface of the rubber sheet by one contact operation. In FIG. 6A, for the purpose of explanation, the sensor 26 is disposed on both the cutting surface 23S on the front end side of the rubber sheet 23 and the cutting surface 23B on the rear end side of the rubber sheet 23. The detection operation is performed by the sensor.

FIG. 6B is a view as seen from the side of the sensor 26. A sensor 26 is in contact with the upper surface of the rubber sheet 23 near the edge of the cut surface of the cut rubber sheet 23 placed on the conveyor belt 21. From FIG. 6B, if there is a wire jumping out from the cut surface of the rubber sheet and jumping out to the top surface of the rubber sheet, the wire comes into contact with the bottom surface of the sensor 26, so that the jumping wire can be detected from the detection principle of the present invention described above. I understand well. In FIG. 6B, for the purpose of explanation, the sensor 26 is disposed on both the cutting surface 23S on the front end side of the rubber sheet 23 and the cutting surface 23B on the rear end side of the rubber sheet 23. The detection operation is performed by the sensor. FIG. 6B schematically shows the wire 30 protruding in the lateral direction from the cut surfaces 23S and 23B of the rubber sheet. Such a protruding wire cannot be detected by the method shown in FIG. This can be detected by the method shown in FIG.

FIG. 7A is a plan view, and the sensor 26 is substantially parallel to the edge of the rubber sheet cutting surface, and is on the conveyor belt near the front of the rubber sheet cutting surface 23S or near the rear of the rubber sheet cutting surface 23B. It arrange | positions so that a sensor bottom face may contact on a belt. By doing so, it is possible to detect the presence or absence of a wire protruding in the lateral direction from the rubber sheet cutting surface 23S or 23B by one contact operation. In FIG. 6A, for the purpose of explanation, the sensors 26 are arranged on both the front end side cut surface 23S of the rubber sheet 23 and the rear end side cut surface 23B of the rubber sheet 23. Usually, however, one sensor is used. Perform detection operation.

FIG. 7B is a view seen from the side of the sensor 26. A sensor 26 is in contact with the conveyor belt 21 on the side of the cut surface of the cut rubber sheet 23 placed on the conveyor belt 21 (near the front of the cut surface 23S or near the rear of the cut surface 23B). From FIG. 7B, if there is a wire that protrudes in the lateral direction of the rubber sheet from the cut surface of the rubber sheet, the wire contacts the bottom surface of the sensor 26. Therefore, it is possible to detect the protruding wire from the detection principle of the present invention described above. I understand well. In FIG. 7B, for the sake of explanation, the sensor 26 is disposed on both the cutting surface 23S on the front end side of the rubber sheet 23 and the cutting surface 23B on the rear end side of the rubber sheet 23. The detection operation is performed by the sensor. FIG. 7B schematically shows the wire 31 jumping laterally from the cut surface 23S or 23B of the rubber sheet and riding on the upper surface of the rubber sheet. Such a jumping wire is a method shown in FIG. However, it can be detected by the method shown in FIG.

FIG. 7A is a plan view, and the sensor 26 is disposed so as to ride on the entire conveyor belt in the vicinity of the front of the cutting surface or the entire vicinity of the rear of the cutting surface, substantially parallel to the cutting surface of the rubber sheet. By doing so, it is possible to detect the presence or absence of a wire that protrudes laterally from the cut surface of the rubber sheet by a single contact operation.

As can be seen from FIG. 7B, the sensor 26 can be detected even with a short jump wire by bringing it as close as possible to the rubber sheet cutting surface 23S or 23B. For this purpose, it is also effective to provide a sensor for detecting the position of the sensor cut surface or to precisely move the sensor 26. It is also important to precisely control the position of the rubber sheet 23 by precisely moving the conveyor belt.

Note that the sensor 26 can detect the pop-out wire by bringing it as close as possible (for example, up to about the thickness of the wire) without completely contacting the rubber sheet 23 or the conveyor belt 21.

Next, an example of a detection operation using the sensor of the present invention will be described with reference to FIG.
(1) After the rubber sheet 22 carried by the conveyor belt 21 is cut by a cutter or the like, the cut rubber sheet 22 is fed by the conveyor belt 21, and the front side cut surface 22S of the rubber sheet 22 (cut rubber after cutting) In front of the front end side cut surface 23S of the sheet 23), the sensor 26 is lowered and brought into contact with the conveyor belt 21. Thereby, it is determined whether or not there is a wire protruding from the front end side cut surface 22S of the rubber sheet 22 in the lateral direction (front side). At this time, the cutting surface 22 is positioned and the sensor 26 is lowered, whereby the sensor 26 can be brought closer to the cutting surface 22S, and can be brought into contact with or closer to the conveyor belt 21 more accurately. .

(2) Next, the sensor 26 is raised and the rubber sheet 22 is fed a little by the conveyor belt 21, and then the sensor 26 is lowered and contacts the upper surface of the rubber sheet 22 including the edge of the cutting end surface 22S of the rubber sheet 22. Make it approach. Thereby, it is determined whether or not there is a wire jumping out from the front end side cut surface 22S of the rubber sheet 22 and wrapping around the upper surface of the rubber sheet 22. At this time, as shown in FIG. 6, a part of the bottom surface of the sensor 26 is placed outside (the space of) the edge of the cut surface 22S of the rubber sheet 22 and cannot be detected by the process shown in the above (1). Cover the part. For example, it is possible to detect a wire that jumps out from the cut surface 22S and jumps straight upwards (the jumping out to the lateral direction is small).

(3) Next, the sensor 26 is raised, the conveyor belt 21 is fed by the length of one rubber sheet, the rear end rubber sheet is cut and positioned, and the rear end of the rubber sheet 22 is cut. Thereby, the cut rubber sheet 23 is formed.

(4) Next, the cut rubber sheet 23 is sent a little by the conveyor belt, positioned with the sensor 26, the sensor 26 is lowered, and the upper surface of the rubber sheet 23 including the edge of the rear end cut surface 23B of the rubber sheet 23 Touch or approach. Thereby, it is determined whether or not there is a wire jumping out from the rear end side cut surface 23B of the rubber sheet 23 and wrapping around the upper surface of the rubber sheet 23. At this time, as shown in FIG. 6, a part of the bottom surface of the sensor 26 is also placed outside (the space of) the edge of the cut surface 23B of the rubber sheet 23 and cannot be detected by the process shown in (5) described later. Cover the part. For example, it is possible to detect a wire that jumps out from the cut surface 22B and jumps straight upward (lessly protruding in the lateral direction).

(5) Next, the sensor 26 is raised and the rubber sheet 23 is fed a little by the conveyor belt 21, and then the sensor 26 is lowered and contacts the conveyor belt 21 behind the rear end side cut surface 23B of the rubber sheet 23. Make it approach. Thereby, it is determined whether or not there is a wire protruding from the rear end side cut surface 23B of the rubber sheet 23 in the lateral direction (rear) side. At this time, the cutting surface 23 is positioned and the sensor 26 is lowered, so that the sensor 26 can be brought closer to the cutting surface 22B, and can be brought into contact with or closer to the conveyor belt 21 more accurately. .

(6) If there is no problem in the determination of the presence / absence of the wire in the steps (1), (2), (4) and (5) described above, the rubber sheet 23 cut thereafter is wound around a molding drum and the rubber sheet 23 is wound. The splice is performed. If there is a problem with the judgment, the molding operation is temporarily stopped to investigate. By performing all the steps (1), (2), (4) and (5) described above, various jumping wires can be detected, and the problems caused by the jumping wires can be eliminated. If there is no problem with some jumping wires, the above process can be omitted. For example, if the number of wires jumping upward from the cut surface of the rubber sheet is very small, (2) and (4) can be omitted from the above steps. Further, for example, if the popping wire bends almost upward, the popping wire can be detected only by performing the steps (2) and (4).

In the above-described detection operation, the sensor (head) has a length that covers the entire cut surface, but may be a size that covers a part of the cut surface. However, in that case, the popping wire of the entire cut surface cannot be detected by one operation, so it is necessary to divide it several times. Therefore, although the detection operation time becomes long, the sensor can be made small, so that the cost for producing the sensor and the incidental cost can be suppressed. In addition, if there are a lot of jumping wires in a specific region of the cut surface, it may be sufficient to detect the jumping wire only in that region, so even a short sensor can sufficiently play a role.

FIG. 8 is a diagram showing a sensor head bottom surface 11a of a sensor in which a groove 35 is provided on a side surface of the sensor head and an electric wire is wound obliquely using the groove. The plurality of electric wires are not distinguished and are indicated by a thick black solid line 36. FIG. 8 is basically the same as FIG. 2, but shows the state of the wire wound at various inclinations. If the pitch of the groove is r, the electric wire 36 is wound around the groove, and therefore, the distance of the electric wire 36 on the upper side of the sensor head bottom surface 11a, that is, the intersection line between the side surface 11d in the longitudinal direction of the sensor head and the bottom surface 11a. A groove is formed at the same position on the bottom side of the sensor head bottom surface 11a, that is, the intersection of the side surface 11f in the longitudinal direction of the sensor head and the bottom surface 11a, and the distance between the centers of the electric wires 36 at the bottom side (from the center of the electric wire 36). The distance to the center of the adjacent electric wire) is also r. If the pitch of the wire 36 wound obliquely is p and the angle of the wire 36 is α, it is the same as in FIG. 2, and therefore p = rsin α. (Note that the depth of the groove is ignored.) In the rubber sheet for tires, if the length of the sensor 26 is 800 mm to 1000 mm, the cut surface can be almost covered. Further, if the width of the bottom surface of the sensor head is 20 mm to 100 mm, the jumping wire can be detected. Of course, it can be longer and wider, but the sensor becomes larger, so it is necessary to select an appropriate size in consideration of production time and cost.

In FIG. 8A, since it is wound around one groove, when the sensor width w is 30 mm and the groove pitch r is 10 mm, α is approximately 72 degrees and the pitch p between the wires 36 is approximately 9.5mm. In FIG. 8B, since it is wound around two grooves, α is about 56 ° and p is about 8.3 mm. In FIG. 8C, since it is wound around three grooves, α is about 45 degrees and p is about 7.1 mm. In FIG. 8D, since it is wound around four grooves, α is about 37 degrees and p is about 6.0 mm. If a groove having a constant groove pitch r is formed in this way, the analog continuous α and electric wire pitch p are not obtained, but a smaller α and pitch p can be freely set digitally. In the case of FIG. 8D, if the thickness (diameter) of the electric wire is 1 mm, the distance between the electric wires is about 5.0 mm. 5.0mm wire can be detected. If α is further reduced, a wire having a shorter length can be detected. For example, when wound around 8 grooves (FIG. 8 (e)), α is about 21 degrees and p is about 3.5 mm, so the distance between the wires is about 2.5 mm and the length is about 2.5 mm. A wire can be detected. If a protruding wire having such a length can be detected, there is no problem in joining rubber tire sheets. However, how much pop-out wire is practical is determined by comprehensively considering the relationship with materials, bonding technology such as bonding method, work efficiency, cost, and reliability. There is a need. That is, a sufficiently practical sensor can be realized even in the case of FIG.

When the groove pitch is reduced, α and the pitch p can be selected more finely. For example, if the groove pitch is 5 mm, an intermediate value when the groove pitch is 10 mm can be selected. If the pitch is further reduced, the length of the wire that can be detected can be shortened. Further, α and pitch p can be changed by changing the sensor width. Increasing the sensor width can increase the angle α. Moreover, the space | interval of an electric wire can be changed also by changing the thickness (diameter) of an electric wire. If the thickness (diameter) of the electric wire is increased, the interval between the electric wires can be reduced.

In the conventional sensors, the sensor head bottom surface is a flat surface, and the flat surface is in contact with a rubber sheet surface (which is also a flat surface) and a conveyor belt surface (which is also a flat surface). Next, sensors that contact the rubber sheet surface (which is also a flat surface) and the conveyor belt surface (which is also a flat surface) with lines will be described.

FIG. 9 is a diagram showing a cylindrical sensor and its operation. FIG. 9A is a schematic diagram of the cylindrical sensor 40, in which two electric wires 42 and 43 are wound around the cylindrical sensor head 41 with a constant pitch (p). In the case of a cylindrical sensor, since any part contacts the subject, the pitch p should be constant in any part. Since the sensor rotates, taking out the electrodes of the electric wires 42 and 43 requires some contrivance. For example, as shown in FIG. 9A, after winding an electric wire, the end of the electric wire is put into a cylindrical head and guided to the bottom surface 41S of the cylindrical sensor head 41, and the electric wire 43 is connected to the center electrode of the circular bottom surface. Connected to 43S, the electric wire 42 is connected to the concentric electrode 42S. If a voltage is applied to these electrodes 42S and 43S, a voltage V can always be applied to the wires 42 and 43 as long as the cylindrical sensor 40 rotates about the central axis of the cylinder. The current flowing between the wires 42 and 43 can be detected by the ammeter A.

FIG. 9B is a schematic diagram showing how to use the cylindrical sensor. A cut rubber sheet 45 is placed on the conveyor belt 44. The cylindrical sensor 40 moves while contacting or approaching the conveyor belt 44 and the rubber sheet 45 while rotating. (Direction indicated by arrow 48) If there is a wire jumping out from the cutting surface 45S on the tip side of the rubber sheet 45 (for example, the jumping wire 46S), it will contact the two electric wires 42 and 43, so that the jumping wire can be detected. it can. Since the rubber sheet 45 is thicker than the conveyor belt 44 at the cut surface 45S of the rubber sheet 45, the cylindrical sensor 40 supports the sensor up and down so that it rotates over the thickness, for example, a cylinder It is better to have a degree of freedom.

The cylindrical sensor 40 moves while rotating on the rubber sheet 45, and contacts or approaches the rear end side cut surface 45B of the rubber sheet 45. At this time, if there is a wire jumping upward from the cut surface 45B (for example, the jumping wire 46B), it comes into contact with the two electric wires 42 and 43, so that the jumping wire can be detected. As the sensor 40 further rotates, it goes down from the cut surface 45B and contacts or approaches the conveyor belt 44. At this time, it is possible to detect a cut-out wire 45B or a protruding wire in the lateral direction.

There is also a method of moving the conveyor belt 44 without moving the sensor 40. That is, the conveyor belt 44 is moved in the direction 47, and the rubber sheet 45 placed on the conveyor belt 44 is moved to contact the sensor 40. The wire detection method of the sensor 40 in this case is the same as the method described above. (Which is the relative movement, it can be considered that the way of viewing is changed.) Even if the sensor 40 is not moved, the conveyor belt 44 can be rotated by rotating the sensor 40 around the central axis. In addition, the contact resistance with the rubber sheet 45 can be reduced, and the life of the sensor can be extended. Further, if the center axis of the sensor 40 is close to a right angle with respect to the moving direction of the conveyor belt, the sensor 40 can rotate in synchronization with the moving speed of the conveyor belt 44, so that the contact resistance can also be reduced. . In this case, since the cut surfaces 45S and 45B of the rubber sheet 45 are inclined at a certain angle with respect to the moving direction of the conveyor belt, they cannot contact or approach the cut surfaces 45S and 45B at a time, but the sensor 40 is rotating. Therefore, the entire cut surface can be detected. Therefore, there is no problem with the detection area. Compared with the case where the cylindrical sensor is a fixed contact sensor, the edge portion of the cut surface of the rubber sheet comes into closer contact with each other, so that the detection sensitivity of the jumping wire is better.

Even in this case, a groove may be formed in the cylindrical sensor head 41, and the electric wires 42 and 43 may be fitted into the groove and wound. In the case of a cylindrical sensor, since the entire curved surface can detect the wire, it is necessary to determine the depth and size of the groove so that the electric wire comes out from the surface of the cylindrical head. Since the cylindrical sensor rotates, the position variation of the wound wire can be reduced when the groove is formed.

As described above, by using the conductor detection sensor of the present invention, it is possible to detect a wire protruding from the cut surface of the tire rubber sheet with a very simple and high sensitivity. In addition, since the sensor is easy to manufacture, consumes little, and has a long life, low manufacturing costs and low running costs can be realized.

The sensor of the present invention is not limited to a rubber sheet for tires, and can be applied to an insulating sheet in which a conductor is embedded. Since the rubber sheet described above can be applied to various materials other than rubber, it may be generally called a sheet-like member. Since the sensor of the present invention is not limited in size, it can be easily manufactured by changing the size according to the sheet-like member to be measured. Further, in the above description, even if the contents described in one embodiment and not described in the other embodiments can be applied to each other without contradiction, it can be applied in the embodiment. Needless to say.

The present invention is applicable to the manufacture of tire rubber sheets.

10 conductor detection sensor, 11 sensor head, 12 electric wire, 13 electric wire,
14 terminal electrode, 15 terminal electrode, 16 groove, 17 groove, 19 conductor (wire),
21 conveyor belt, 22 rubber sheet, 23 rubber sheet, 25 cutting line,
26 Conductor detection sensor, 27 Sensor lifting cylinder, 28 Cutter mounting machine,
29 sensor mounting arm, 30 wire, 31 wire, 35 groove, 36 wire,
40 cylindrical sensor, 41 cylindrical sensor head, 42 electric wire, 43 electric wire,
44 conveyor belt, 45 rubber sheet, 46S jumping wire,
46B jump wire, 101 conveyor device, 102 conveyor belt,
103 (band-shaped) rubber sheet, 104 rubber sheet, 106 wires, 107 wires,
120 rubber sheet, 121 insulating member, 122 metal wire, 124a electrode plate,
124b electrode plate, 125 insulation plate

Claims (14)

A conductor detection sensor for detecting a conductor protruding from a cut surface of a sheet-like member embedded with a conductor, and the detection surface of the conductor detection sensor is wound a plurality of times substantially in parallel with a plurality of conductive wires. A conductor detection sensor characterized by comprising:
The sensor head shape of the detection sensor is a horizontally long rectangular parallelepiped shape, and the detection surface of the detection sensor is the bottom surface of the sensor head of the detection sensor,
The detection surface of the bottom surface of the sensor head of the detection sensor is in contact with the upper surface of the sheet-like member on the cut surface of the sheet-like member, and detects a conductor protruding upward from the cut surface of the sheet-like member,
The detection surface of the bottom surface of the sensor head of the detection sensor is in contact with a conveyor belt in front of or behind the cut surface of the sheet-like member, and detects a conductor that protrudes laterally from the cut surface of the sheet-like member. Conductor detection sensor. In a normal state, the adjacent conductive wires are not electrically connected to each other, and are adjacent when the conductor protruding from the cut surface of the sheet-like member embedded with the conductor contacts two adjacent conductive wires. The conductor detection sensor according to claim 1, wherein the protruding conductor is detected by utilizing electrical conduction between conductive wires. The sensor head bottom surface, which is the detection surface of the detection sensor, is a flat surface,
The conductive wire enters and is wound into a groove formed on the bottom surface of the sensor head, and a part of the thickness of the conductive wire that enters the groove protrudes outside the bottom surface of the sensor head. The conductor detection sensor according to claim 1 or 2 . It said sensor head bottom surface is characterized by having a length to cover the entire sheet-like member cutting surface, conductive body detection sensor according to any one of claims 1-3. Conductive wire wound around the sensor head bottom, characterized in that inclined at an angle to the longitudinal direction of the sensor head bottom surface, conductive body according to any one of claims 1-4 Detection sensor. A method for detecting a conductor protruding from a cut surface of a sheet-like member using the conductor detection sensor according to any one of claims 1 to 5,
After cutting the front end portion of the sheet-like member, the detection surface of the sensor head bottom surface of the detection sensor contacts the conveyor belt in front of the sheet-like member cutting surface and protrudes laterally from the cut surface of the sheet-like member. Detecting a conductor;
After cutting the front end portion of the sheet-like member, the bottom surface of the front end of the sheet-like member is brought into contact with the bottom surface of the sensor head of the conductor detection sensor to detect the conductor protruding upward from the cut surface of the sheet-like member. Process,
After the rear end portion of the sheet-like member is cut and the cut sheet-like member is separated, the sensor head bottom surface of the conductor detection sensor is brought into contact with the upper surface of the rear end portion of the cut sheet-like member to detect a jumping conductor. After the process, and after cutting the rear end portion of the sheet-like member and separating the cut sheet-like member, the detection surface of the sensor head bottom surface of the detection sensor is in contact with the conveyor belt behind the sheet-like member cutting surface, A method for detecting an electric conductor, comprising a step of detecting an electric conductor protruding in a lateral direction from a cut surface of the sheet-like member. A conductor detection sensor for detecting a conductor protruding from a cut surface of a sheet-like member embedded with a conductor, and the detection surface of the conductor detection sensor is wound a plurality of times substantially in parallel with a plurality of conductive wires. A conductor detection sensor characterized in that a sensor head shape of the conductor detection sensor is a cylindrical shape, and a detection surface is a side surface of the cylinder,
In the state where the cut sheet-like member is placed on a conveyor belt,
The sensor head of the conductor detection sensor is
Move while rotating,
After contacting the conveyor belt at the front or rear of the sheet-shaped member cutting surface, contacting the sheet-shaped member cutting surface,
A conductor detection sensor for detecting a conductor jumping out in a lateral direction and / or upward of a sheet-like member cutting surface by moving over the sheet-like member cutting surface and moving to the upper surface of the sheet-like member. A conductor detection sensor for detecting a conductor protruding from a cut surface of a sheet-like member embedded with a conductor, and the detection surface of the conductor detection sensor is wound a plurality of times substantially in parallel with a plurality of conductive wires. A conductor detection sensor characterized in that a sensor head shape of the conductor detection sensor is a cylindrical shape, and a detection surface is a side surface of the cylinder,
In the state where the cut sheet-like member is placed on a conveyor belt,
By moving the sheet-like member,
The sensor head of the conductor detection sensor is
While rotating
After contacting the conveyor belt at the front or rear of the sheet-shaped member cutting surface, contacting the sheet-shaped member cutting surface,
A conductor detection sensor for detecting a conductor jumping out in a lateral direction and / or upward of a sheet-like member cut surface by running over the sheet-like member cut surface over the sheet-like member cut surface. In a normal state, the adjacent conductive wires are not electrically connected to each other, and are adjacent when the conductor protruding from the cut surface of the sheet-like member embedded with the conductor contacts two adjacent conductive wires. The conductor detection sensor according to claim 7 or 8, wherein the protruding conductor is detected by utilizing electrical conduction between conductive wires. The at least one end of the plurality of conductive wires wound around the side surface of the cylinder is connected to a center electrode or a concentric electrode formed on the bottom surface of the cylinder. The conductor detection sensor according to item. The conductive wire enters and is wound into a groove formed on the side surface of the cylinder, and a part of the thickness of the conductive wire that enters the groove protrudes outside the sensor head detection surface. The conductor detection sensor according to any one of claims 7 to 10, wherein the conductor detection sensor is characterized. The conductor detection sensor according to claim 7, wherein a detection surface of the detection sensor has a length that covers the entire cut surface of the sheet-like member. The conductor detection according to claim 7, wherein the conductive wire wound around the detection surface of the detection sensor is inclined at a constant angle with respect to the longitudinal direction of the detection surface. Sensor. A method for detecting a conductor jumping out of a sheet-like member using the conductor detection sensor according to any one of claims 7 to 13,
The conductor detection sensor comes into contact with the conveyor belt in front of or behind the sheet-like member cutting surface, the cylindrical sensor moves while rotating, moves over the sheet-like member cutting surface and moves to the upper surface of the sheet-like member. The step of detecting the conductor jumping out from the cut surface of the sheet-like member, and / or the conductor detection sensor comes into contact with the conveyor belt in front of or behind the cut surface of the sheet-like member, and the sheet-like member moves, thereby A step of detecting a conductor jumping out of the sheet-like member cutting surface by running over the sheet-like member upper surface over the sheet-like member cutting surface while the sensor rotates,
A conductor detection method comprising:

Images