JP6959180B2 - Canvas supply mechanism for covering the belt molding - Google Patents

Description

INDUSTRIAL APPLICABILITY In the process of manufacturing a wrapped belt such as a wrapped V-belt, the present invention covers the canvas when the covering process performs the covering process of winding the canvas around the surface of the belt ring-shaped body along the circumferential direction. The present invention relates to a canvas supply mechanism for covering a belt molded body for supplying to a portion.

Conventionally, as a transmission belt for transmitting power, a wrapped belt such as a wrapped V-belt whose surface is wrapped with a canvas and covered with a canvas has been used. The canvas coated on the surface of the wrapped belt is provided for the purpose of ensuring the longitudinal crack resistance of the wrapped belt, but in order to follow the bending motion as a transmission belt, elasticity in the longitudinal direction of the belt is also required. Be done. Therefore, as the canvas arranged on the surface of the wrapped belt, for example, a canvas formed by applying a rubberizing treatment to a woven fabric in which fibers are woven by crossing at a predetermined angle (so-called bias canvas) is used. Used.

Then, in the above-mentioned canvas, as a joint portion (so-called bias joint) which is a portion which is overlapped and joined when the canvas as a material is joined and formed and which extends diagonally with respect to the longitudinal direction of the canvas. Material seams are formed at substantially fixed intervals. Since the material seams are formed at predetermined intervals in the canvas, the wrapped belt is usually formed with one or more material seams. For example, if the distance between the material seams is every 1 m and the circumference of the wrapped belt is 60 inches to 105 inches (about 1.5 m to about 2.7 m), one or more material seams are always formed. ing. For this reason, it is difficult in manufacturing to prevent the material seam from being included in the wrapped belt.

Further, the canvas arranged on the surface of the wrapped belt has joints extending diagonally with respect to the longitudinal direction of the canvas at both ends in the longitudinal direction of the canvas at the winding start portion and the winding end portion, as in the case of the material seam. Molding seams are formed. In the wrapped belt, the molding seam is usually formed at one place.

When manufacturing a wrapped V-belt among the wrapped belts, a belt molded body that is in a state before vulcanization of the wrapped V-belt is molded. When molding a belt molded body, first, an unvulcanized compressed rubber layer, a core wire layer, and an unvulcanized stretched rubber layer are laminated to form a rectangular cross section perpendicular to the longitudinal direction. A belt ring-shaped body, which is an endless belt body, is formed. Then, in the traveling mechanism provided in the molding apparatus for the belt molded body, the belt ring-shaped body is traveled between the pair of pulleys. Further, in a state where the belt ring is traveled by the traveling mechanism, a skive treatment is performed in which the corners of the belt ring are cut off. After the skive treatment is performed, a canvas is wrapped around the surface of the belt ring along the circumferential direction, and a covering treatment (wrapping of the canvas) is performed to cover the belt ring with the canvas. As a result, the belt molded body formed by covering the surface of the belt ring-shaped body with the canvas is molded. By subjecting the belt molded body to a vulcanization treatment, an elastic wrapped V-belt is formed.

Patent Document 1 discloses a molding apparatus for a belt molded product and a molding method for the belt molded product, which are applied to the production of a wrapped V-belt. Further, in Patent Document 1, a plurality of canvases (lower cover 106, upper cover 107) are used with respect to the belt ring-shaped body 100 traveling between the pair of pulleys 51 and 55 by the traveling mechanism provided in the forming apparatus of the belt molded body. The canvas supply mechanism 7 for covering the belt molded body is described.

By the way, in the manufacturing process of the wrapped V-belt as described above, in order to ensure excellent belt performance, in the covering process described above, a predetermined length (for example, before and after in the longitudinal direction of the canvas from the molding seam). It is required that the above-mentioned material seams do not exist within a range (about 40 mm) apart. This is because the belt characteristics such as flexibility are significantly different from the other parts in the vicinity of the portion where both the material seam and the molding seam are close to each other, which is not preferable in terms of belt quality.

On the other hand, Patent Document 2 describes that the canvas supply mechanism for supplying the canvas to the covering processing unit detects the joint portion of the canvas, which is the material seam, and determines the presence or absence of the material seam. Specifically, in Patent Document 2, the holding cylinder 13 corresponding to the canvas used is extended to hold the canvas being conveyed between the holding roll 11 and the receiving roll 12, and the holding state thereof. Then, both of the rolls supported by the moving cylinder 14 and the moving frame 16 move relative to each other in the feeding direction of the canvas, and if there is a material seam, the holding roll rises, so that the displacement detection sensor 15 moves the step of the material seam. The configuration for detecting is disclosed. Further, Patent Document 2 describes that a range setting switch (not shown) is provided in the moving cylinder 14, and the position of the material seam of the canvas is detected by the operation of the range setting switch. Has been done.

Japanese Unexamined Patent Publication No. 2016-87885 Japanese Unexamined Patent Publication No. 10-231900

When the canvas is wound around the belt ring to form the belt molded body, if the type of the belt molded body determined according to the type of the wrapped belt is changed, the thickness of the canvas, the length of the belt molded body, etc. Information will also change. However, in the canvas supply mechanism disclosed in Patent Document 2, the case where the type of the belt molded body is changed is not disclosed at all. Further, in Patent Document 2, a material seam that causes a quality problem when it exists too close to the molding seam is detected, and the material seam that causes a quality problem is not included in the belt molded body. There is no disclosure of the technology for doing so.

Further, in the canvas supply mechanism disclosed in Patent Document 2, the presence or absence of the material seam is detected, and the position of the material seam in the canvas supply path for supplying the canvas to the covering processing unit is detected. This is performed by operating a moving means connected to a material seam detection unit composed of a holding roll, a receiving roll, and the like. That is, the detection of the position of the material seam on the canvas supply path operates a moving means composed of a moving cylinder 14 or the like that moves the material seam detecting unit in the canvas feeding direction while sandwiching the canvas. It is done by letting.

For the above reasons, in the configuration of the canvas supply mechanism disclosed in Patent Document 2, the canvas is sequentially detected in order to detect the material seam, which causes a problem in belt quality due to being too close to the molding seam during the covering process. It is necessary to suspend the supply of. For this reason, an extra loss time is generated for each covering process, that is, for each molding of one belt molded body, and the productivity of the wrapped belt is lowered by the loss time. Will end up. Further, in the configuration of the canvas supply mechanism disclosed in Patent Document 2, the material seam detection unit is translated in the canvas feed direction for detecting the material seam, which causes a problem in belt quality due to being too close to the molding seam. A moving means including a moving cylinder 14 or the like is required. Therefore, extra cost and space are required, which also causes a problem that the productivity of the wrapped belt is lowered.

The present invention is intended to solve the above problems, and an object of the present invention is to be too close to the next planned cutting position, which is a molding seam, in the covering process without reducing the productivity of the wrapped belt. A canvas supply mechanism for covering the belt molded body that can reliably detect the material seam of the canvas that causes a problem in belt quality and prevent the material seam that causes a problem in quality from being included in the belt molded body. Is to provide.

(1) In order to solve the above problems, the canvas supply mechanism for covering the belt molded body according to a certain aspect of the present invention winds the canvas around the surface of the belt ring-shaped body along the circumferential direction and cuts the canvas. The canvas unwound from the canvas feeding portion is placed in a covering processing portion for performing a covering treatment for forming a belt molded body by providing a molding seam which is a seam portion where the longitudinal end portions of the canvas are joined to each other. The present invention relates to a canvas supply mechanism for covering a belt molded body, which can supply the canvas through a canvas supply path formed along a plurality of receiving rolls to be wound. The canvas supply mechanism for covering the belt molded body according to a certain aspect of the present invention is downstream of the canvas supply path, which is a path for supplying the canvas from the canvas feeding portion to the covering processing portion. As a material, a canvas tip gripping portion that grips the tip portion of the canvas, and a cutting device capable of cutting the portion of the canvas gripped by the canvas tip gripping portion on the covering processing portion side at a predetermined cutting position. The material seam, which is a portion of the canvas that is overlapped and joined at predetermined intervals in the longitudinal direction, is one of the plurality of receiving rolls and is arranged at a predetermined position on the canvas supply path. Material seam detection having a step detection unit that detects a step in the thickness direction of the material seam and a position detector that can track the current position of the material seam detected as the step on the canvas supply path. By moving the position of the portion and the moving roll which is one of the plurality of receiving rolls and is arranged on the canvas supply path, the length of the canvas supply path can be changed for each type of the belt molded body. The path length adjusting unit includes an adjustable path length adjusting unit, and the path length adjusting unit is at the predetermined position on the canvas supply path, and the material seam detecting position where the material seam detecting unit detects the material seam is the said. The cut schedule is a position that goes back on the canvas supply path by a distance corresponding to the length of the canvas for one roll of the belt molded body from the cut position and is a position that will be the molding seam in the next covering process. The canvas supply is traced back to the canvas feeding portion side by at least a predetermined allowable minimum seam distance set as a distance required to be separated from the material seam and the molding seam rather than the position. It is characterized in that the length of the canvas supply path can be adjusted so as to be a position on the path.

According to this configuration, the step of the material seam portion passing on the detection roll arranged at a predetermined position on the canvas supply path is detected by the step detection unit. Then, the current position on the canvas supply path of the material seam detected as a step by the step detection unit is tracked by the position detector. Therefore, it is possible to detect the material seam without stopping the transport of the canvas while supplying the canvas from the canvas feeding section to the covering processing section. Therefore, as in the canvas supply mechanism of Patent Document 2, the material is sequentially stopped by a moving means such as a moving cylinder in order to detect the material seam at each covering process. It is not necessary to move the means for detecting the seam relative to the canvas. Therefore, no extra loss time is generated for each covering process, and extra cost and space for the above-mentioned transportation means are not required, which reduces the productivity of the wrapped belt. Can be prevented.

Further, according to the above configuration, in the path length adjusting unit, the material seam detection position is at least the allowable minimum seam distance from the planned cut position which will be the molding seam in the next covering process for each type of belt molded body. Only, the length of the canvas supply path can be adjusted so that the position is on the canvas supply path that goes back to the canvas feeding portion side. As described above, according to the above configuration, the type of the belt molded body is changed by interlocking the path length adjusting unit and the material seam detecting unit, and particularly when the length of the belt molded body is changed. However, the material seam detection position and the next cut scheduled position can always be maintained in a state of being close to each other within a range separated by at least the allowable minimum seam distance. That is, the material seam detection position is set closer to the canvas feeding portion than the planned cut position so that the distance between the material seam detection position and the next planned cut position is equal to the allowable minimum seam distance A. It can be maintained at a position retroactive by a distance A. Alternatively, the material seam so that the distance between the material seam detection position and the next planned cut position is equal to the distance (A + α) obtained by adding the safety distance α, which is a predetermined margin, to the allowable minimum seam distance A. The detection position can be maintained at a position that is advanced by a distance (A + α) to the canvas feeding portion side from the planned cut position. For this reason, it is possible to detect material seams that pose a problem in belt quality because they are too close to the next planned cut position before and after the next planned cut position, which is the molding seam, within a distance less than the allowable minimum seam distance A. It can be maintained as a reliable one. That is, the material seam detection position and the next cut scheduled position are not always maintained in a state of being close to each other within a range separated by at least the allowable minimum seam distance, and the path length between the two positions becomes long, so that the material seam is formed. Compared to the case where the tracking accuracy of the current position of is likely to decrease, the distance before and after the next scheduled cut position, which is the molding seam, is too close to the next planned cut position within the range of the allowable minimum seam distance A or less. It is possible to reliably maintain the detection of material seams, which is a problem in belt quality.

Further, according to the above configuration, it is possible to reliably detect the material seam which is too close to the next scheduled cutting position which is the molding seam and causes a problem in belt quality. Therefore, based on the detection result, the canvas tip grip portion and the cutting are performed. By operating the device, the material seams that pose a quality problem can be removed so as not to be included in the belt molded body.

Therefore, according to the above configuration, the material seam of the canvas, which is a problem in terms of belt quality, is formed too close to the next planned cutting position, which is the molding seam, during the covering process without reducing the productivity of the wrapped belt. It is possible to provide a canvas supply mechanism for covering the belt molded body, which can be reliably detected and the material seams which pose a quality problem can be prevented from being included in the belt molded body.

(2) Preferably, the step detection portion is arranged to face the detection roll and the detection roll, and is provided at an intermediate portion in the longitudinal direction of the cantilever type swing arm for the detection. A holding roll that is swingably supported by the roll and holds the canvas that is conveyed along the detection roll, and a contact-type displacement sensor that abuts against the swinging tip of the swinging arm. The position detector is an encoder that detects the rotation angle of the detection roll.

According to this configuration, the material seam is provided by a displacement sensor in which the swing tip of the swing arm abuts while the canvas is sandwiched between the detection roll and the holding roll that can swing with respect to the detection roll. The step of the portion can be easily detected. Further, according to the above configuration, a bias canvas or the like that has been rubberized by adjusting the weight (dead weight) of the cantilever type swing arm that sandwiches the canvas between the detection roll and the holding roll. It can be easily set so that the canvas configured as is not excessively stretched or excessively loosened. That is, by adjusting the weight of the swing arm, contact resistance is applied to the canvas, and the canvas is excessively stretched on the covering processing side side of the detection roll, or conversely, the canvas slips on the detection roll. However, it can be easily set so that the canvas does not loosen excessively on the covering processing portion side of the detection roll.

Further, according to the above configuration, by adjusting the length of the swing arm or the position of the holding roll in the swing arm, the displacement amount of the holding roll is amplified at the swing tip portion, and the material seam is reliably detected. be able to. For example, even when the displacement amount of the holding roll is about 0.6 mm, which is about the thickness of a general sail cloth, it swings by adjusting the length of the swing arm or the position of the holding roll on the swing arm. The displacement amount of the tip portion can be amplified several times or more than the displacement amount of the holding roll, and the material seam can be reliably detected. Therefore, the material seam can be detected more reliably than in the case of a configuration in which the actual step cannot be amplified and output.

Further, according to the above configuration, since the position detector is an encoder that detects the rotation angle of the detection roll, not only the feed amount of the canvas but also the current position on the canvas supply path of the material seam can be easily tracked. be able to.

Therefore, according to the above configuration, in each covering process, the canvas supply is temporarily stopped in order to detect the material seam, as in the canvas supply mechanism of Patent Document 2, and then the moving cylinder or the like is used. Even if the means for detecting the material seam is not moved relative to the canvas by the moving means of, the material seam can be easily and surely detected within the range of a series of steady canvas supply operations, and the canvas of the material seam. It can be reliably realized that the current position on the supply path can be easily tracked. Thereby, the decrease in the productivity of the wrapped belt can be more reliably eliminated.

(3) Preferably, the detection roll is a crown roll in which the diameter of the central portion in the axial direction is larger than the diameter of both end portions, and the detection roll is moved from the detection roll to the canvas feeding portion side and the covering processing portion side. The angle formed by each of the extending canvases is an acute angle.

According to this configuration, the detection roll of the material seam detection portion is a crown roll having a large diameter at the central portion in the axial direction with respect to both ends, so that the canvas passing over the detection roll meanders. Can be suppressed. Further, the angle formed by the canvas extending from the detection roll to the canvas feeding portion side and the covering processing portion side is an acute angle (that is, less than 90 °), and is provided so that the winding angle around the detection roll becomes large. .. Therefore, when the canvas passes over the detection roll of the material seam detection unit, it is possible to prevent the canvas from slipping or wrinkling or twisting as if it were wavy in the canvas. .. Therefore, according to the above configuration, even when the tension applied to the canvas supplied on the canvas supply path and the load for sandwiching the canvas between the detection roll and the holding roll are set to be relatively weak. It is possible to prevent the state of the portion holding the canvas from becoming unstable and making it impossible to reliably detect the step at the material joint portion.

(4) Preferably, a cutting detector that detects the end of cutting of the sail cloth by the cutting device and transmits it as a cutting detection signal, and a pressure source that supplies compressed air to the cutting device that operates with compressed air. It is set for each of the belt molded body type information and the belt molded body type information that define the specifications according to the type of the belt molded body, and when the step is detected by the step detection unit, the step detection unit is used. Material seam determination information that defines a threshold for determining the presence or absence of the material seam based on the transmitted step displacement signal, cut schedule position information that determines the cut schedule position on the sail cloth supply path, and the cut schedule position. In addition to being set in response to the information, the material seam detection position information that defines the material seam detection position on the sail cloth supply path and the permissible minimum seam distance information that defines the permissible minimum seam distance are stored. The setting information storage unit, the disconnection detection signal received from the disconnection detector, the rotation angle detection signal of the detection roll received from the position detector, the step displacement signal received from the step detection unit, and the material. Based on at least one of the seam determination information, the planned cut position information, the material seam detection position information, and the allowable minimum inter-seam distance information, the path length adjusting unit, the sail cloth feeding unit, and the pressure source The control unit further includes a control unit for controlling the operation, and the control unit further includes the feed amount of the sail cloth and the position detector based on the detection signal of the rotation angle of the detection roll received from the position detector. The material seam distance D1 which is the distance traced back from the cut position at the material seam current position which is the current position of the material seam on the sail cloth supply path detected in is calculated, and is determined based on the cut detection signal. At the end of cutting the sail cloth, the planned seam distance (| D1-D0 | ) Is calculated to determine whether or not the planned distance between the seams (| D1-D0 |) and the minimum allowable distance between the seams A have the relationship of the following equation (1), and the equation (1) is applicable. In this case, further, the non-determination for determining whether or not the molding seam distance D0 and the material seam distance D1 have the relationship of the following equation (2) is executed, and the path is described for each of the belt molded body type information. The path length adjustment is performed by controlling the operation of the length adjusting unit, the sailing cloth feeding part, and the pressure source, and based on the result of the non-determination at the end of cutting the sailing cloth. A canvas supply mechanism for covering a belt molded body, which controls the operation of at least one of a portion, the canvas feeding portion, and the pressure source.
| D1-D0 | <A ... (1)
D1 ≤ D0 ... (2)

According to this configuration, at least one of a cutting detection signal, a detection roll rotation angle detection signal, a step displacement signal, a material seam discrimination information, a planned cut position information, a material seam detection position information, and a minimum allowable inter-seam distance information. Based on this, a path length adjusting unit, a canvas feeding unit, and a control unit that controls the operation of the pressure source are provided. Therefore, it is possible to easily achieve automation of the operation of the path length adjusting unit, the canvas feeding unit, and the pressure source for operating the cutting device based on the control of the control unit. Further, since the operations of the path length adjusting section, the canvas feeding section, and the pressure source are controlled for each belt molded body type information, the path length adjusting section and the canvas feeding section are controlled even when the type of the belt molded body is changed. , It can be easily achieved to automate the operation of the pressure source for operating the cutting device under the control of the control unit.

Further, according to the above configuration, at the end of cutting the sail cloth, the planned distance between seams (| D1-D0 |), which is the distance between the material seam distance D1 and the molding seam distance D0, is calculated, and the planned distance between seams is calculated. If (| D1-D0 |) is less than the allowable minimum seam distance A, and if the planned seam distance (| D1-D0 |) is less than the allowable minimum seam distance A, the material seam distance. The non-determination is performed to determine whether or not D1 is equal to or less than the molding seam distance D0. Then, based on the result of the non-determination, the operation of at least one of the path length adjusting unit, the canvas feeding unit, and the pressure source for operating the cutting device is controlled. Therefore, based on the above-mentioned non-determination result, the operation of the canvas supply mechanism is controlled, and the canvas supply mechanism is too close to the next scheduled cutting position to be the molding seam within a distance less than the allowable minimum seam distance A. It is possible to automatically and surely control the operation of detecting the material seam, which is a problem in terms of belt quality.

In the above non-determination, if the planned seam distance (| D1-D0 |) is less than the allowable minimum seam distance A, the allowable minimum seam distance A with respect to the next planned cutting position to be the molding seam. The presence of material seams that pose a problem in belt quality due to too close distance within a range of less than is detected. On the other hand, if the planned distance between seams (| D1-D0 |) is equal to or greater than the minimum allowable distance between seams A, the distance approaches the next planned cutting position to be the molding seam within the range of the minimum allowable distance between seams A. It will be detected that there is no material seam that causes a problem in belt quality due to excessive use. Further, when the planned seam distance (| D1-D0 |) is less than the allowable minimum seam distance A and the material seam distance D1 is equal to or less than the molding seam distance D0, the next planned cutting position to be the molding seam. The material seam, which is too close to the allowable minimum seam distance A and causes a problem in belt quality, covers the same position as the next planned cut position or the next planned cut position, which is the molding seam. It is detected that it exists on the ring processing unit side. On the other hand, when the planned seam distance (| D1-D0 |) is less than the allowable minimum seam distance A and the material seam distance D1 is larger than the molding seam distance D0, the next planned cutting position to be the molding seam. It is detected that the material seam, which is too close to the minimum permissible seam distance A and causes a problem in belt quality, exists on the sail cloth feeding part side from the next planned cutting position which is the molding seam. Will be done. According to the above configuration, based on these non-judgment results, the operation of the canvas supply mechanism is controlled to approach the next planned cutting position to be the molding seam within a range of a distance less than the allowable minimum seam distance A. It is possible to automatically and surely control the operation of detecting the material seam, which is a problem in belt quality.

(5) Preferably, the swivel arm is attached to a rotating shaft connected to a swivel drive portion and has a grip portion capable of gripping the tip portion of the canvas, and the grip portion grips the canvas. When the swivel arm swivels around the rotation axis, a pull-out device for pulling out the canvas and an opening portion are provided, and the compressed air from the pressure source that supplies the compressed air is taken into the opening portion and the opening portion is described. The opening portion has a tubular main body portion that generates a negative pressure, and the tip portion of the canvas is pulled out by the drawing device, and the canvas is cut at the cutting position by the cutting device, and the cut canvas is used. When the canvas piece is guided to one end side of the opening portion by the pull-out device, the canvas piece is sucked out from the other end side of the opening portion, so that the canvas piece can be recovered. , Is further equipped.

According to this configuration, when a material seam that causes a problem in belt quality is detected because the material seam is too close to the next planned cutting position to be the molding seam within a distance less than the allowable minimum seam distance A, the drawer device is used. Can be operated to pull out an appropriate amount of the tip of the canvas and excise it. As a result, the material seam, which is a problem in terms of belt quality, can be easily displaced and separated from the next scheduled cutting position, which is the molding seam. Then, the canvas piece that has been pulled out and cut off can be sucked out by a removing device, collected, and removed. Therefore, according to the above configuration, the material seam which becomes a molding seam and becomes too close to the next planned cutting position and causes a problem in belt quality is easily displaced from the molding seam and separated, and the material seam which becomes a problem in belt quality becomes. The process not included in the belt molded body can be easily executed.

(6) Preferably, the swivel arm is attached to a rotating shaft connected to the swivel drive unit and has a grip portion capable of gripping the tip portion of the canvas, and the grip portion grips the canvas. When the swivel arm swivels around the rotation axis, a drawing device for pulling out the canvas and an opening portion are provided, and the compressed air from the pressure source that supplies the compressed air is taken into the opening portion and the opening portion is described. The opening portion has a tubular main body portion that generates a negative pressure, and the tip portion of the canvas is pulled out by the drawing device, and the canvas is cut at the cutting position by the cutting device, and the cut canvas is used. When the canvas piece is guided to one end side of the opening portion by the pull-out device, the canvas piece is sucked out from the other end side of the opening portion, so that the canvas piece can be recovered. , The grip portion opening / closing detector that detects the opening / closing operation of the canvas tip grip portion and transmits it as a grip portion opening / closing detection signal, and the grip portion opening / closing detection that detects the opening / closing operation of the grip portion and transmits it as a grip portion opening / closing detection signal. A device, a swivel position detector that detects the swivel position of the swivel arm around the rotation axis and transmits it as a swivel position signal, the canvas tip grip portion operated by compressed air, the cutting device, the grip portion, and the grip portion. The pressure source for supplying compressed air to the removing device is further provided, the setting information storage unit stores the swivel operation time information that defines the swivel operation time of the swivel arm, and the control unit stores the swivel operation time information. The grip opening / closing detection signal received from the grip opening / closing detector, the grip opening / closing detection signal received from the grip opening / closing detector, the turning position signal received from the turning position detector, and the turning operation. Based on at least one of the time information, the operation of the canvas tip grip portion, the cutting device, the pulling device, the removing device, and the pressure source is controlled, and the control unit is based on the result of the non-determination. The operation of the canvas tip gripping portion, the cutting device, the drawing device, the removing device, and the pressure source is controlled.

According to this configuration, the control unit further sets the canvas tip grip portion, the cutting device, and the drawer based on at least one of the grip portion open / close detection signal, the grip portion open / close detection signal, the turning position signal, and the turning operation time information. It controls the operation of the device, the removal device, and the pressure source that operates the canvas tip grip, cutting device, grip, and removal device. Therefore, the operation of the canvas tip gripping portion, the cutting device, the drawing device, the removing device, and the pressure source for operating the canvas tip gripping portion, the cutting device, the gripping portion, and the removing device is automated based on the control of the control unit. Can be easily achieved.

According to the above configuration, the operation of the canvas tip gripping portion, the cutting device, the pulling device, the removing device, and the pressure source can be automated by the control of the control unit. The operation can be performed reliably and automatically in a very short time. As a result, in addition to reliably detecting the material seam that causes a problem in belt quality due to being too close to the next scheduled cutting position that becomes the molding seam, the material seam that causes a problem in belt quality is not included in the belt molded body. It can be reliably and automatically executed in a short time, including the control of the process for making the wrap belt, and the decrease in the productivity of the wrapped belt can be more reliably eliminated.

According to the present invention, the material seam of the canvas, which is a problem in belt quality, can be reliably detected during the covering process without reducing the productivity of the wrapped belt because it is too close to the next planned cutting position, which is the molding seam. However, it is possible to provide a canvas supply mechanism for covering the belt molded body, which can prevent the material seam which is a problem in quality from being included in the belt molded body.

It is a figure which shows typically the molding apparatus of the belt molded body which includes the canvas supply mechanism for covering the belt molded body which concerns on one Embodiment of this invention. It is a figure for demonstrating the shape of the belt ring shape, FIG. 2A is an outline view, and FIG. 2B is a cross-sectional view taken along the line IB-IB of FIG. 2A. It is a figure for demonstrating the shape of the belt molded body, FIG. 3A is an outline view, and FIG. 3B is a cross-sectional view taken along the line IIB-IIB of FIG. 3A. It is a figure which shows typically the material seam detection part in the canvas supply mechanism. It is a figure which shows typically the material seam detection part in the canvas supply mechanism. It is a figure which shows typically the path length adjustment part in the canvas supply mechanism. It is a figure which shows typically the drawing device in the canvas supply mechanism. It is a figure for demonstrating the operation of a pull-out device. It is a figure for demonstrating the operation of a pull-out device. It is a figure for demonstrating the operation of a pull-out device. It is a figure which shows typically the removal device in the canvas supply mechanism. It is a flowchart for demonstrating the process for preventing the material seam which becomes a problem in belt quality from being included in a belt molded body. It is a figure which shows typically the material seam detection part and its vicinity in the canvas supply mechanism, and is the figure which shows the state which the material seam and the planned cut position are close to each other.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing a molding apparatus 2 for a belt molded body including a canvas supply mechanism 1 for covering the belt molded body according to an embodiment of the present invention. In the following description, the canvas supply mechanism 1 for covering the belt molded body according to the embodiment of the present invention is also simply referred to as the canvas supply mechanism 1, and the belt ring-shaped body molding device 2 is simply referred to as. Also referred to as molding apparatus 2. 2A and 2B are views for explaining the shape of the belt ring-shaped body, FIG. 2A is an external view, and FIG. 2B is a cross-sectional view taken along the line IB-IB of FIG. 2A. 3A and 3B are views for explaining the shape of the belt molded body, FIG. 3A is an external view, and FIG. 3B is a cross-sectional view taken along the line IIB-IIB of FIG. 3A.

[Belt molding device]
The molding apparatus 2 includes the canvas supply mechanism 1 and the covering processing unit 3 according to the present embodiment, and is configured as an apparatus for molding the belt molded body 105. The belt molded body 105 is formed as a material constituting a wrapped V-belt (not shown) as a transmission belt for transmitting power, and has elasticity by vulcanizing the belt molded body 105. A wrapped V-belt is formed.

The covering processing portion 3 of the molding apparatus 2 is configured by subjecting a belt ring-shaped body having a substantially rectangular cross-sectional shape (shape of a cross section perpendicular to the longitudinal direction) to a skive treatment for cutting off the corners thereof. It is configured as a device for winding the canvas 106 around the surface of the belt ring-shaped body 100. Then, the covering processing unit 3 winds the canvas 106 around the surface of the belt ring-shaped body 100 along the circumferential direction, and provides a molding seam which is a seam portion in which the longitudinal end portions of the cut canvas 106 are joined to each other. It is configured as a device that performs a covering process for forming the belt molded body 105.

Further, the covering processing unit 3 is configured to include a traveling mechanism having a pair of pulleys (3a, 3b) set in a state where the belt ring-shaped body 100 is wound. The covering processing unit 3 winds the canvas 106 supplied from the canvas supply mechanism 1 around the belt ring 100 traveling between the pair of pulleys (3a, 3b) by the traveling mechanism, whereby the belt ring 100 is wound. The belt molded body 105 is formed by subjecting it to a covering treatment.

The traveling mechanism provided with the pair of pulleys (3a, 3b) is provided with a traveling mechanism driving unit 3c that travels while rotating the belt ring-shaped body 100 wound around the pair of pulleys (3a, 3b). .. The traveling mechanism driving unit 3c rotates one of the pair of pulleys (3a, 3b) to rotate the pair of pulleys (3a, 3b) in which the belt ring-shaped body 100 is wound, and belts. It is configured to run the ring-shaped body 100. The traveling mechanism driving unit 3c is configured to include, for example, an electric motor that rotationally drives one of the rotating shafts of the pair of pulleys (3a, 3b). Further, the traveling mechanism drive unit 3c is configured to operate based on a command from the control unit 21b of the control device 21 described later, and the operation is controlled by the control unit 21b. Further, the traveling mechanism drive unit 3c is provided with a traveling mechanism position detector 3d for detecting the traveling position of the traveling mechanism. The traveling mechanism position detector 3d is configured as, for example, an encoder that detects the rotation angle of the rotating shaft of the electric motor of the traveling mechanism driving unit 3c. By detecting the rotation angle of the rotation shaft of the electric motor of the traveling mechanism drive unit 3c, the traveling position when the belt ring-shaped body 100 is traveling in the circumferential direction is detected in the traveling mechanism. The detection signal S3 of the traveling mechanism position detector 3d is received by the control unit 21b of the control device 21. The control unit 21b grasps the traveling position when the belt ring-shaped body 100 is traveling in the circumferential direction based on the detection signal S3 of the traveling mechanism position detector 3d, and the traveling mechanism driving unit 3c receives the required number of rotations. Control the electric motor to rotate. In FIG. 1, since it is schematically shown, one of the pair of pulleys (3a, 3b) and the traveling mechanism drive unit 3c are individually shown, but the pair of pulleys (3a, 3b). ) And the traveling mechanism drive unit 3c are connected.

Further, the covering processing unit 3 is configured so that when the covering processing for the belt ring-shaped body 100 is completed and the belt molded body 105 is molded, the belt molded body 105 is automatically removed from the traveling mechanism. .. Further, in the covering processing unit 3, when the belt molded body 105 is removed from the traveling mechanism, the belt ring-shaped body 100 which is the target to be covered next and has already been subjected to the skiving treatment is automatically subjected to. It is configured to be set in the traveling mechanism. Therefore, in the molding apparatus 2, as soon as the canvas 106 being supplied from the canvas supply mechanism is cut just before the end of the covering process, the belt molded body 105 whose covering process is completed is promptly removed. It is removed from the traveling mechanism. Then, the next belt ring-shaped body 100 to be covered is set in the traveling mechanism, the traveling of the belt ring-shaped body 100 by the traveling mechanism is started, and the canvas 106 is supplied from the canvas supply mechanism 1 to the covering processing unit 3. Will be done. Therefore, in the molding apparatus 2, the time in which the supply of the canvas 106 is temporarily stopped during the steady operation of the molding apparatus 2 is as short as, for example, about 10 seconds. The time during which the supply of the canvas 106 is temporarily stopped is mainly the time required for setting the belt ring-shaped body 100 in the traveling mechanism and removing the belt molded body 100 from the traveling mechanism. Therefore, in the molding apparatus 2, the time in which the supply of the canvas 106 is temporarily stopped is very short during the steady operation, so that the productivity when the canvas supply mechanism 1 supplies the canvas 106 to the covering processing unit 3 is very short. The decrease in the productivity of the wrapped belt is prevented.

[Belt ring]
As shown in FIG. 2, the belt ring-shaped body 100 has a compressed rubber layer 101 and an elongated rubber layer 103, and a core wire 102 sandwiched between the rubber layers 101 and 103. The belt ring-shaped body 100 is formed in an endless loop shape having a peripheral length of a predetermined length (for example, 60 to 105 inches as an example). The width w of the belt ring-shaped body 100 is, for example, about 13 mm, and the thickness t of the belt ring-shaped body 100 is, for example, about 8 mm. Further, the belt ring-shaped body 100 has a substantially trapezoidal shape or a substantially V-shaped cross-sectional shape (shape of a cross section perpendicular to the longitudinal direction). The substantially trapezoidal shape or the substantially V-shaped cross-sectional shape of the belt ring-shaped body 100 is formed by subjecting the substantially rectangular belt ring-shaped body to a skive treatment for cutting off the corners on the inner peripheral side thereof. Has been done.

The compressed rubber layer 101 is a loop-shaped rubber layer having a peripheral length of a predetermined length, and the cross-sectional shape perpendicular to the longitudinal direction is formed in a trapezoidal shape as shown in FIG. 2 (B). The compressed rubber layer 101 is made of, for example, natural rubber (NR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), or the like. The compressed rubber layer 101 is provided as a rubber layer on the inner peripheral side of the belt ring-shaped body 100.

The stretched rubber layer 103 is a loop-shaped rubber layer having a peripheral length substantially the same as that of the compressed rubber layer 101, and the compressed rubber is sandwiched between the stretched rubber layer 101 and a plurality of core wires 102. It is in a state of being stacked on the layer 101. The width of the stretched rubber layer 103 is the same as that of the compressed rubber layer 101, while the thickness of the stretched rubber layer 103 is formed to be thinner than that of the compressed rubber layer 101. Like the compressed rubber layer 101, the stretched rubber layer 103 is made of natural rubber (NR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), or the like. The stretchable rubber layer 103 is provided as a rubber layer on the outer peripheral side of the belt ring-shaped body 100.

The core wire 102 is held in a state of being sandwiched between the compressed rubber layer 101 and the stretched rubber layer 103. The core wire 102 is provided over the entire peripheral length of each of the rubber layers 101 and 103. The core wire 102 is provided so as to extend along the circumferential direction of the rubber layers 101 and 103. As a result, the core wire 102 functions as a reinforcing member for preventing the belt ring-shaped body 100 from breaking. The core wires 102 are arranged so as to be evenly spaced from each other along the width direction of the rubber layers 101 and 103. As the core wire 102, for example, a wire such as a polyester fiber, a nylon fiber, or an aramid fiber is used. Note that FIG. 2B illustrates a belt ring-shaped body 100 having eight core wires 102, but the number of core wires 102 is not limited to this. Although not shown, an adhesive rubber layer may be provided on the surface of the compressed rubber layer 101 on the core wire 102 side and the surface of the stretched rubber layer 103 on the core wire 102 side.

Since the belt ring-shaped body 100 having the above-described configuration is in an unvulcanized state, its surface portion has adhesiveness and low elasticity.

[Belt molded body]
The belt molded body 105 shown in FIG. 3 is formed by subjecting the belt ring-shaped body 100 described above to a covering process in which the canvas 106 is wound around the surface of the belt ring-shaped body 100 by the covering processing unit 3. Will be done. The cross-sectional shape of the belt molded body 105 (the shape of the cross section perpendicular to the longitudinal direction) is formed to have a substantially trapezoidal shape or a substantially V-shaped shape, similar to the cross-sectional shape of the belt ring-shaped body 100. Further, in the belt molded body 105, a molding seam which is a seam portion of the canvas 106 in which the longitudinal end portions of the cut canvas 106 are joined to each other is provided at one place in the longitudinal direction.

The canvas 106 is provided as a canvas that covers the surface of the belt ring-shaped body 100. In the belt molded body 105, the canvas 106 is composed of one layer. Further, the canvas 106 has, for example, a thickness of about 0.6 mm and a width of about 50 mm, and is configured as a biased canvas that has been subjected to a rubberized treatment.

[Canvas supply mechanism for covering the belt molded body]
The canvas supply mechanism 1 (canvas supply mechanism 1 for covering the belt molded body) shown in FIG. 1 includes a canvas feeding portion 11, a plurality of receiving rolls 12, a canvas tip gripping portion 13, a cutting device 14, and a dancer portion 15. It is configured to include a material seam detecting unit 16, a path length adjusting unit 17, a drawing device 18, a removing device 19, a pressure source 20, a control device 21, and the like. Then, the canvas supply mechanism 1 connects the canvas 106 to the covering processing unit 3 via the canvas supply path 22 formed along the plurality of receiving rolls 12 around which the canvas 106 unwound from the canvas feeding unit 11 is wound. Is configured as a mechanism that can supply. Further, the canvas supply mechanism 1 is configured as a mechanism for supplying the canvas 106 to the covering processing unit 3 via one canvas supply path 22. The canvas supply path 22 is configured as a path for supplying the canvas 106 along the plurality of rolls 12 from the canvas feeding section 11 to the covering processing section 3. Further, in the following description, in the canvas supply path 22, the cover ring processing portion 3 side is also referred to as a front, and the canvas feeding portion 11 side is also referred to as a rear.

[Canvas feeding part]
The canvas feeding unit 11 has a canvas feeding pulley 11a around which a long canvas 106 is wound, and a feeding pulley driving unit 11b that rotationally drives the canvas feeding pulley 11a. The canvas feeding portion 11 is configured to feed the canvas 106 to the canvas supply path 22 by rotating the canvas feeding pulley 11a that is rotationally driven by the feeding pulley driving unit 11b. The feeding pulley driving unit 11b is configured to include, for example, an electric motor that rotationally drives the rotating shaft of the canvas feeding pulley 11a. Further, the feeding pulley drive unit 11b is configured to operate based on a command from the control unit 21b of the control device 21 described later, and the operation is controlled by the control unit 21b. In FIG. 1, since the drawing is schematic, the feeding pulley driving unit 11b and the canvas feeding pulley 11a are shown separately, but the feeding pulley driving part 11b and the canvas feeding pulley 11a are connected to each other. Has been done.

The canvas 106 unwound from the canvas feeding portion 11 is configured as, for example, a canvas (so-called bias canvas) formed by applying a rubberizing treatment to a woven fabric in which fibers are woven by crossing at a predetermined angle. Then, in the canvas 106, the material as a joint portion (so-called bias joint) which is a portion which is overlapped and joined when the canvas 106 as a material is joined and formed and extends diagonally with respect to the longitudinal direction of the canvas. The seams 23 are formed at substantially constant predetermined intervals.

[Receiving roll]
The plurality of receiving rolls 12 are provided as rolls around which the canvas 106 unwound from the canvas feeding portion 11 is wound, and are configured to form the canvas supply path 22. Each of the plurality of receiving rolls 12 is configured as a crown roll in which the diameter of the central portion in the axial direction is larger than the diameter of the both end portions.

[Canvas tip grip]
The canvas tip grip portion 13 is provided as a mechanism for gripping the tip portion of the canvas 106 on the front side, which is the downstream side of the canvas supply path 22. More specifically, the canvas tip grip portion 13 is configured to grip the tip portion of the canvas 106 at the downstream (front side) end of the canvas supply path 22. Further, the canvas tip grip portion 13 is arranged in the vicinity of the covering processing portion 3.

The canvas tip grip portion 13 operates with compressed air supplied from the pressure source 20 described later to perform an operation of gripping the tip portion of the canvas 106 and an operation of releasing the grip of the tip portion of the canvas 106. It is configured. The canvas tip grip portion 13 has a clamp portion 13a that opens and closes with the supply and discharge of compressed air from the pressure source 20. A small air cylinder (not shown) for supplying and discharging compressed air from the pressure source 20 is connected to the clamp portion 13a, and the clamp portion 13a is operated as the air cylinder is operated by supplying and discharging the compressed air. The opening and closing operation is performed. The canvas tip gripping unit 13 operates so as to grip the canvas 106 when the covering process 3 starts the covering process on the belt ring-shaped body 100 and when the covering process ends. Then, the canvas tip grip portion 13 operates so as to release the grip of the canvas 106 while the covering process of the belt ring-shaped body 100 is being performed by the covering processing unit 3. The canvas tip grip portion 13 is configured to operate based on a command from the control unit 21b of the control device 21 and to control the operation by the control unit 21b.

Further, the canvas tip grip portion 13 is provided with a grip portion open / close detector 13b that detects the opening / closing operation of the clamp portion 13a of the canvas tip grip portion 13. When the grip portion opening / closing detector 13b detects the opening / closing operation of the clamp 13a of the canvas tip grip portion 13, the detection result is transmitted as a grip portion opening / closing detection signal S13 to the control unit 21b of the control device 21 described later. ing. The grip portion open / close detector 13b is configured as, for example, an auto switch attached to the air cylinder.

Further, on the rear side of the canvas tip grip portion 13 on the canvas supply path 22, a roller guide 24 is provided for smoothly transporting the canvas 106 to the canvas tip grip portion 13. Further, the canvas supply mechanism 1 is provided with a canvas grip portion displacement mechanism 25 for displacing the position of the canvas tip grip portion 13. The canvas grip portion displacement mechanism 25 operates based on a command from the control unit 21b of the control device 21, and the tip of the canvas with respect to the upper pulley 3a, which is one of the pair of pulleys (3a, 3b) of the covering processing unit 3. It is configured to displace the position of the grip portion 13.

[Cutting device]
The cutting device 14 is configured as a device capable of cutting a portion of the canvas gripped by the canvas tip gripping portion 13 on the side of the covering processing portion 3 at a predetermined cutting position CP. The cut position CP is set in the vicinity of the upper end portion of the upper pulley 3a. Further, the cutting device 14 has a scissors-shaped air cutter (not shown) for cutting the canvas 106, and operates with compressed air supplied from the pressure source 20 to drive the air cutter to drive the canvas 106. It is configured to perform a disconnect operation. Further, the cutting device 14 is provided with a cutting detector 14a for detecting the end of cutting of the canvas 106 by the cutting device 14. When the disconnection detector 14a detects the disconnection operation of the disconnection device 14, the disconnection detector 14a is configured to transmit the detection result as a disconnection detection signal S14 to the control unit 21b of the control device 21. The cutting detector 14a includes, for example, a proximity sensor or a displacement sensor that detects the operation of the air cutter of the cutting device 14.

[Dancer club]
The dancer portion 15 is located on the side of the canvas supply path 22 near the canvas feeding portion 11, and is provided from the canvas feeding portion 11 at a portion of a plurality of receiving rolls 12 arranged on the upper side and the lower side at sufficient intervals in the vertical direction. It is provided as a mechanism for applying a constant tension to the drawn canvas 106. The upper receiving roll 12 is provided with a plurality of upper receiving rolls 12a, and the lower receiving roll 12 is provided with a plurality of lower receiving rolls 12b. The dancer unit 15 is configured as a mechanism for movably supporting the plurality of lower receiving rolls 12b with respect to the plurality of upper receiving rolls 12a in the vertical direction (directions indicated by arrows X at both ends in FIG. 1). There is.

The dancer portion 15 of the present embodiment includes one bracket 15a in which the support shafts of two lower receiving rolls 12b adjacent to each other in the front-rear direction are fixed and supported so as to be movable in the vertical direction together with the lower receiving rolls 12b. It is composed of. The dancer portion 15 is configured such that the bracket 15a serves as a dead weight to apply a predetermined tension to the canvas 106 wound around the lower receiving roll 12b.

Further, the dancer portion 15 shown in FIG. 1 is in a state of waiting at the bottom dead center, and a part of the lower surface of the bracket 15a is in contact with the stopper 15b. Further, at the horizontal position facing the side surface of the central portion in the front-rear direction of the dancer portion 15 at the bottom dead center, a feeding stop position detector 15c for detecting that the dancer portion 15 has moved to the bottom dead center is provided. .. Further, it is detected that the dancer portion 15 has moved to the above-mentioned upper predetermined position at a horizontal position facing the side surface of the central portion in the front-rear direction of the dancer portion 15 at the upper predetermined position located above the bottom dead center. A feeding start position detector 15d is provided. The feeding stop position detector 15c and the feeding start position detector 15d are both configured as proximity sensors.

The constant tension applied to the canvas 106 by the dancer unit 15 is set by adjusting the weight of the bracket 15a in advance. The weight of the bracket 15a is adjusted by adjusting the outer dimensions of the bracket 15a and the like. The level of tension applied to the canvas 106 by the dancer section 15 is such that the canvas 106 wound around the plurality of receiving rolls 12 does not excessively extend in the supply direction of the canvas 106 (that is, the longitudinal direction of the canvas 106). Moreover, it is set so as to be within a range that does not loosen excessively.

[Operation of the canvas tip gripping part, dancer part, and canvas feeding part during the covering process]
When the covering process is performed, the canvas tip grip portion 13 in a state where the tip portion of the canvas 106 is gripped is displaced by the canvas grip portion displacement mechanism 25, and the upper pulley 3a of the traveling mechanism of the covering processing section 3 is displaced. Move to near the top of. As a result, the tip of the canvas 106 comes into close contact with the belt ring-shaped body 100. Next, the tip of the canvas 106 is brought into contact with the belt ring-shaped body 100 by a pressing roll (not shown) provided in the covering processing section 3 and pressed toward the belt ring-shaped body 100 wound around the upper pulley 3a. It is pressed against the outer peripheral surface. As a result, the tip of the canvas 106 in close contact with the belt ring-shaped body 100 is pressed by the pressing roll.

At the initial stage of the covering process, the feeding pulley driving unit 11b has not started the driving operation of the canvas feeding pulley 11a, and the rotation of the canvas feeding pulley 11a has stopped. In this state, the traveling mechanism is driven by the traveling mechanism driving unit 3a in the covering processing unit 3, and the belt ring-shaped body 100 wound around the pair of pulleys (3a, 3b) is traveled. As a result, the canvas 106 is pulled by the traveling mechanism of the covering processing unit 3, and the canvas 106 on the canvas supply path 22 is continuously supplied to the covering processing unit 3, while the dancer unit 13 gradually moves upward. Move to.

When the feeding start position detector 15d detects that the dancer unit 13 has moved to the above-mentioned upper predetermined position during the covering process, the feeding start position detector 15d controls the detection result as the feeding start position detection signal S15d. It is transmitted to the control unit 21b of the device 21. Upon receiving the feeding start position detection signal S15d, the control unit 21b controls the operation of the feeding pulley driving unit 11b and starts driving the canvas feeding pulley 11a. As a result, the operation of feeding the canvas 106 from the canvas feeding portion 11 to the canvas supply path 22 is started.

When the canvas 106 is fed out from the canvas feeding section 11, the dancer section 15 gradually moves downward, and when the dancer section 13 reaches the above-mentioned bottom dead center, the dancer section 15 has moved to the bottom dead center. The detector 15c detects it. When the feeding stop position detector 15c detects that the dancer unit 15 has moved to the above bottom dead center, the feeding stop position detector 15c uses the detection result as the feeding stop position detection signal S15c and is the control unit of the control device 21. Send to 21b. When the control unit 21b receives the feeding stop position detection signal S15c, the control unit 21b controls the operation of the feeding pulley driving unit 11b and stops the driving of the canvas feeding pulley 11a. As a result, the feeding operation of the canvas 106 from the canvas feeding portion 11 to the canvas supply path 22 is stopped.

During the covering process, the canvas 106 is supplied to the covering processing section 3 in a state where a constant tension is applied to the canvas 106 delivered from the canvas feeding section 11 by repeating the above operation. ..

[Material seam detector]
As described above, the canvas 106 supplied from the canvas feeding section 11 to the covering processing section 3 along the canvas supply path 22 is overlapped and joined at predetermined intervals in the longitudinal direction of the canvas 106 as a material. The material seam 23, which is a portion, is formed. The material seam detecting unit 16 is provided as a mechanism for detecting the material seam 23 in the canvas 106 that is fed and conveyed from the canvas feeding unit 11.

4 and 5 are diagrams schematically showing the material seam detection unit 16. Note that FIG. 4 schematically shows the material seam detecting unit 16 together with a part of the path length adjusting unit 17. Further, FIG. 5 schematically shows the material seam detection unit 16 in a further enlarged manner. The material seam detection unit 16 shown in FIGS. 1, 4, and 5 includes a step detection unit 26 and a position detector 27.

The step detection unit 26 is one of the plurality of receiving rolls 12, and is located on the detection roll 12c arranged at a predetermined position on the canvas supply path 22 and passes over the detection roll 12c in the thickness direction of the material seam 23. It is configured as a mechanism to detect a step. Since the material seam 23 is configured as a portion of the canvas 106 that is overlapped and joined in the thickness direction, a step is generated in the thickness direction. The step detection unit 26 is configured to detect this step. Further, the above-mentioned predetermined position is a predetermined position on the canvas supply path 22, and is set as a material seam detection position SP in which the material seam detection unit 16 detects the material seam 23.

The position detector 27 is configured as a detector capable of tracking the current position on the canvas supply path 22 of the material seam 23 detected as a step by the step detection unit 26. More specifically, the position detector 27 is provided as an encoder that detects the rotation angle of the detection roll 12c. Further, the position detector 27 is configured to transmit a detection signal S27 of the rotation angle of the detected detection roll 12c to the control unit 21b of the control device 21.

Here, the step detection unit 26 will be described in more detail. The step detection unit 26 includes the above-mentioned detection roll 12c, a swing arm 28, a holding roll 29, and a displacement sensor 30.

The detection roll 12c is provided as one of the plurality of receiving rolls 12, and is installed at the material seam detection position SP on the canvas supply path 22. The detection roll 12c is rotatably supported by a shaft portion fixed to a bracket 31 installed at an upper position in the canvas supply mechanism 1. Further, the detection roll 12c is provided as a crown roll in which the diameter of the central portion in the axial direction is larger than the diameter of both end portions. Then, the canvas 106 is used for detection so that the angle formed by the canvas 106 extending from the detection roll 12c to the canvas feeding portion 11 side and the covering processing portion 3 side is an acute angle (that is, an angle of less than 90 °). It is wrapped around a roll 12c. That is, the canvas 106 is wound around the detection roll 12c so that the angle θ shown in FIG. 5 is an acute angle. The angle θ may be set to, for example, about 10 °.

The swing arm 28 is configured as a cantilever swing arm that is cantileveredly supported with respect to the support shaft 28a fixed to the bracket 31 and rotatably supported with respect to the support shaft 28a. Has been done.

The pressing roll 29 is arranged above the detecting roll 12c so as to face the detecting roll 12c, and is provided as a roll rotatably supported by the swing arm 28. Further, the holding roll 29 is swingably supported by the detection roll 12c by being provided at an intermediate portion in the longitudinal direction of the cantilever type swing arm, and is conveyed along the detection roll 12c. The 106 is configured to be held in a state of being sandwiched between the detection roll 12c and the detection roll 12c.

The displacement sensor 30 is configured as a contact-type displacement sensor that comes into contact with the swing tip portion 28b of the swing arm 28. The displacement sensor 30 includes a housing 30a, a rod 30b, a spring for urging the rod 30b (not shown), and a sensor unit (not shown). The rod 30b is provided so as to penetrate the housing 30a and project upward, and is supported so as to be displaceable in the vertical direction with respect to the housing 30a. The above spring is housed in the housing 30a and is provided as a spring for urging the rod 30b upward. The above-mentioned sensor unit is provided as a sensor unit capable of detecting the amount of displacement of the rod 30b in the vertical direction and digitally outputting the displacement. Further, the housing 30a of the displacement sensor 30 is fixed to the bracket 31 so that the tip surface of the rod 30b abuts substantially orthogonally to the lower surface of the swing tip portion 28b of the swing arm 28. The shaft portion of the detection roll 12c, the support shaft 28a of the swing arm 28, and the housing 30a are fixed to one bracket 31.

In the step detection unit 26, the holding roll 29 supported by the swing arm 28 is wound around the detection roll 12c and conveyed by the weight of the cantilever swing arm 28 with respect to the canvas 106. It is pressed while rotating. When a step of the material seam 23 passes between the detection roll 12c and the pressing roll 29, the pressing roll 29 is displaced upward with respect to the detection roll 12c according to the thickness of the step, and the pressing roll 29 is displaced upward with respect to the detection roll 12c. The swing arm 28 also swings upward. Then, when the swing arm 28 swings upward, the swing tip 28b is displaced upward, and the rod 30b from the housing 30a of the displacement sensor 30 follows the swing tip 28b by the urging force of the spring and moves upward. Displace. When the rod 30b is displaced upward, the amount of displacement is detected by the sensor unit of the displacement sensor 30. This detection result is configured to be transmitted to the control unit 21b of the control device 21 as an output signal of the displacement sensor 30. The output signal from the displacement sensor 30 is the step displacement signal S26 transmitted from the step detection unit 26 to the control unit 21b when the step is detected by the step detection unit 26.

Here, the effect of amplifying the displacement amount of the step detected by the step detection unit 26 will be described with reference to FIG. As shown in FIG. 5, the distance between the axes L1 and the sensor distance L2 can be set according to the length of the swing arm 28 and the position of the holding roll 29 on the swing arm 28. Here, the inter-axis distance L1 is the distance between the support shaft 28a of the swing arm 28 and the position corresponding to the axes of the detection roll 12c and the holding roll 29 in the longitudinal direction of the swing arm 28. That is, the inter-axis distance L1 is the distance between the support shaft 28a and the position corresponding to the material seam detection position SP in the longitudinal direction of the swing arm 28. The sensor distance L2 is the distance along the swing arm 28 between the support shaft 28a of the swing arm 28 and the portion of the swing tip 28b that comes into contact with the tip of the rod 30a of the displacement sensor 30.

By adjusting the length of the swing arm 28 or the position of the holding roll 29 on the swing arm 28, the ratio (L2 / L1) of the sensor distance L2 to the inter-axis distance L1 can be appropriately set. For example, the ratio (L2 / L1) of the sensor distance L2 to the inter-axis distance L1 can be set to be several times, for example, three times. In this case, if the step in the thickness direction of the canvas 106 passing over the detection roll 12c of the material seam detection unit 26 is, for example, 0.6 mm, the amplified displacement obtained by amplifying the displacement amount of the step by the swing arm 28 is It will be 1.8 mm. Therefore, the step detection unit 26 can output the amplified displacement signal to the control unit 21b of the control device 21. As an example, the inventor of the present application implemented the canvas supply mechanism 1 in which the ratio (L2 / L1) of the sensor distance L2 to the inter-axis distance L1 is set to 3 times. Then, the amplification displacement was verified when the actual displacement amount in the portion of the pressing roll 29 was 0.6 mm, which is about the thickness of the canvas. Specifically, an embodiment was carried out in which the inter-axis distance L1 was set to 50 mm and the sensor distance L2 was set to 150 mm. As a result, the displacement amount of the swing tip portion 28b of the swing arm 28 with which the rod 30b of the displacement sensor 30 abuts is three times the actual displacement amount in the holding roll 29 portion and three times the thickness of the canvas. It was confirmed that it could be amplified up to a certain 1.8 mm.

[Route length adjustment unit]
FIG. 6 is a diagram schematically showing the path length adjusting unit 17. The path length adjusting unit 17 shown in FIGS. 1, 4 and 6 moves the position of the moving roll 12d, which is one of the plurality of receiving rolls 12 and is arranged on the canvas supply path 22, to move the belt. The length of the canvas supply path 22 is provided as a mechanism that can be adjusted for each type of the molded body 105.

The path length adjusting unit 17 includes the above-mentioned moving roll 12d and a ball screw mechanism 32 that rotatably supports the moving roll 12d and vertically movably supports the moving roll 12d. The ball screw mechanism 32 includes a ball screw 32a, a ball screw nut 32b, a bracket portion 32c, a drive motor 32d, a speed reducer 32e, a pair of guide shafts 32f, and the like.

The ball screw 32a is provided as a shaft member in which a spiral thread groove is formed on the shaft rod. The ball screw nut 32b is provided as a nut member screwed into the ball screw 32a. The bracket portion 32c is fixed to the ball screw nut 32b and is provided as a member to which the support shaft of the moving roll 12d is fixed. The drive motor 32d is provided as an electric motor that rotates the ball screw around the axis. The drive motor 32d is configured to operate and rotate based on a command from the control unit 21b of the control device 21. The speed reducer 32e is configured as a speed reducer that transmits the drive torque of the drive motor 32d to the ball screw 32a, and in the present embodiment, the speed reducer 32e includes a timing belt. The pair of guide shafts 32f extend in parallel in the vertical direction and are provided as shaft members inserted into the bracket portion 32c. The pair of guide shafts 32f are fixed to the upper facing member 32g at the upper end portion and fixed to the lower facing member 32h at the lower end portion. The bracket portion 32c is supported so as to be slidably movable in the vertical direction with respect to the pair of guide shafts 32f.

In the ball screw mechanism 32a, the drive torque is transmitted to the ball screw 32a via the speed reducer 32e by rotating the drive motor 32d based on a command from the control unit 21b. Then, when the drive torque is transmitted, the ball screw 32a rotates about the axis, and the bracket portion 32c fixed to the ball screw nut 32b screwed into the screw groove of the ball screw 32a moves linearly in the vertical direction to the bracket portion 32c. The rotatably supported moving roll 12d also moves in the vertical direction. As a result, the path length adjusting unit 17 is configured to be able to move the position of the moving roll 12d and adjust the length of the canvas supply path 22 of the canvas 106 wound around the moving roll 12d. .. It is preferable that an electric servomotor is used as the drive motor 32d. By using the drive motor 32c as an electric servomotor, the rotation control of the ball screw 32a by the control unit 21b can be precisely performed.

Further, in the path length adjusting unit 17, when the covering process of the belt molded body 105 of each type of the belt molded body 105 is started based on the control of the control unit 21b of the control device 21, when the covering process of the belt molded body 105 of that type is started. The position of the moving roll 12d is changed in advance, and the length of the canvas supply path 22 is adjusted. At this time, in the path length adjusting unit 17, the canvas is supplied from the cut position CP of the canvas 106 to the material seam detection position SP on the detection roll 12c of the material seam detecting unit for each type of the belt molded body 105. The canvas supply path 22 is adjusted so that the length along the path 22 is a predetermined length slightly longer than the length of the canvas 106 for one roll of the belt ring-shaped body 105.

Specifically, referring to FIG. 4, in the path length adjusting unit 17, the material seam detection position SP is set from the cut position CP to the belt molded body for each type (particularly, belt length) of the belt molded body 105. At least more permissible than the planned cut position XP, which is a position that goes back on the canvas supply path 22 by a distance corresponding to the length of the canvas 106 for one roll of 105 and is a position that will be a molding seam in the next covering process. The length of the canvas supply path 22 is adjusted so that the position is on the canvas supply path 22 that goes back to the canvas feeding portion 11 side by the minimum seam distance A. Here, the allowable minimum seam distance A is a predetermined distance set as a required distance between the material seam 23 and the molding seam. The distance traced back from the cut position CP to the planned cut position XP is the distance between the molding seams, and hereinafter, this distance is referred to as the molding seam distance D0. In the example shown in FIG. 4, the material seam detection position SP is the position on the canvas supply path 22 that is traced back to the canvas feeding portion 11 side by the distance SX (distance indicated by the arrows SX at both ends) from the planned cut position XP. The length of the canvas supply path 22 is adjusted so as to be. Therefore, the distance SX is a distance equal to or greater than the allowable minimum seam distance A.

The length of the canvas supply path 22 is adjusted so that the material seam detection position SP is located back to the canvas feeding portion 11 side by at least the allowable minimum seam distance A from the next planned cut position XP. This is to ensure that the material seam 23 existing within the allowable minimum seam distance A before and after the next scheduled cutting position, which is the molding seam, is detected in advance during the covering process.

The material seam detection position SP may be a position on the canvas supply path 22 that goes back to the canvas feeding portion 11 side by the allowable minimum seam distance A from the next scheduled cut position XP, but the permissible minimum seam distance. On the canvas supply path 22 that traces back to the canvas feeding portion 11 side by the distance (A + α) obtained by adding the safety distance α (for example, 5 mm), which is an error equivalent distance of about several millimeters, to A (for example, 40 mm) as a predetermined margin. It is preferable to use the position of. That is, the distance SX traced back from the planned cut position XP to the material seam detection position SP is preferably a distance (A + α). Therefore, the material seam detection position SP is the canvas feeding portion 11 from the cut position CP by the sum of the material seam distance D0, the allowable minimum seam distance A, and the safety distance α, that is, the distance (D0 + A + α). It is preferably a position on the canvas supply path 22 that goes back to the side.

Here, the safety distance α, which is the distance equivalent to the above error, is related to the tracking accuracy of the current position on the canvas supply path 22 of the material seam 23, which is tracked based on the detection result of the position detector 27, and is actually This is an amount corresponding to the distance (error) between the current position of the material seam 23 and the current position of the material seam 23 recognized by the control unit 21b of the control device 21. This is because the thickness of the canvas 106 slightly fluctuates between lots of the canvas 106 as a rubberized bias canvas, and the amount of feed (distance) of the canvas 106 per rotation angle of the detection roll 12c is correspondingly the same. ) Changes. By adjusting the distance SX that goes back from the planned cut position XP to the material seam detection position SP in consideration of the safety distance α, which is the distance equivalent to this error, for example, the current position of the actual material seam 23 is the next cut. It is possible to prevent the control unit 21b from erroneously recognizing that the distance is within the allowable minimum seam distance A immediately before the planned position XP but is not within this range.

The length of the canvas supply path 22 is adjusted by the path length adjusting unit 17 based on the control of the control unit 21b as described above. The control unit 21b contains belt molded body type information (information such as belt molded body length, canvas type, etc. determined by a preliminary test) stored in the setting information storage unit 21a described later in the control device 21, and the belt molded body. Path length adjustment based on the planned cut position information set for each type information (information that determines the planned cut position on the canvas supply path 22 corresponding to the length of the canvas 106 for one roll of the belt ring-shaped body 105). The operation of the unit 17 (unsteady operation) is controlled. Then, by the control of the control unit 21b, the length of the canvas supply path 22 from the cut position CP to the material seam detection position SP is set for each type of the belt molded body 105 (particularly, the length of the belt molded body 105). Changes are made.

[Drawer]
FIG. 7 is a diagram schematically showing the drawing device 18. 8 to 10 are diagrams for explaining the operation of the drawing device 18. In addition, in FIGS. 7 to 10, the drawing device 18, and the upper pulley 3a of the canvas tip gripping portion 13 and the covering processing portion 3 are also schematically shown. The drawer device 18 shown in FIGS. 1, 7 to 10 includes a swivel arm 18d having a grip portion 18c attached to a rotary shaft 18b connected to the swivel drive portion 18a and capable of gripping the tip end portion of the canvas 106. There is. The drawer device 18 is configured to pull out the canvas 106 by turning the swivel arm 18d around the rotation shaft 18b by being driven by the swivel drive unit 18a while the gripping portion 18c grips the canvas 106. ing.

The swivel drive unit 18a is configured as an electric motor, connected to the rotating shaft 18b, operates based on a command from the control unit 21b of the control device 21, and the operation is controlled by the control unit 21b. .. Although the swivel drive unit 18a and the rotary shaft 18b are individually illustrated in FIG. 1 because they are schematically shown, the swivel drive unit 18a and the rotary shaft 18b are connected to each other. By rotating the rotary shaft 18b by the swivel drive unit 18a based on the control of the control unit 21b, the swivel arm 18d supported by the rotary shaft 18b in a cantilever shape is swiveled around the rotary shaft 18b. .. A grip portion 18c is provided on the other end side of the swivel arm 18d whose one end side is supported by the rotating shaft 18b and swivels around the rotating shaft 18b.

In the extraction device 18, for example, the swivel position detector (18e) facing the swivel arm 18d at each of the three angular positions so that the swivel arm 18d swivels in three steps by driving the swivel drive unit 18a. , 18f, 18g) are arranged. The swivel position detectors (18e, 18f, 18g) are provided as proximity sensors. The swivel position detectors (18e, 18f, 18g) are configured to detect the swivel position of the swivel arm 18d around the rotation shaft 18b and transmit the detection result as a swivel position signal S18p to the control unit 21b of the control device 21. Has been done.

The swivel arm 18d has three positions: a first angle position defined by the swivel position detector 18e, a second angle position defined by the swivel position detector 18f, and a third angle position defined by the swivel position detector 18g. It is configured to be able to stop at the position. The swivel arm 18d performs a swivel operation by driving the swivel drive unit 18a under the control of the control unit 21b. Then, the swivel arm 18d is stopped from being driven by the swivel drive unit 18a by the control of the control unit 21b based on the detection result by the swivel position detectors (18e, 18f, 18g), and the swivel arm 18d is at the first to third angle positions. Perform a stop operation.

For example, the first angle position defined by the turning position detector 18e is defined as a position where the gripping portion 18c of the pulling device 18 performs a gripping operation of the tip portion of the canvas 106. Further, the second angle position defined by the turning position detector 18f is defined as a position where the tip end portion of the canvas 106 pulled out by the pulling-out device 18 is cut. Further, the third angle position defined by the turning position detector 18g is a position where the cut canvas piece of the canvas 106 is removed, and a gripping operation of the tip of the canvas 106 by the gripping portion 18c of the drawing device 18. It is defined as the position where the swivel arm 18d stands by before moving to the first angle position to perform. It should be noted that the turning operation time information in which the turning operation time (for example, about 0.5 seconds) between the adjacent angle positions of the turning arm 18d is determined in advance is stored in the setting information storage unit 21a described later in the control device 21. .. The operation time of the swivel arm 18d is controlled by the control unit 21b based on the swivel operation time information stored in the setting information storage unit 21a. The swivel drive unit 18a may be composed of a servomotor, an amplifier, a bracket, or the like. In this case, the proximity sensor constituting the turning position detector (18e, 18f, 18g) becomes unnecessary.

The grip portion 18c is configured to operate with compressed air supplied from the pressure source 20 to perform an operation of gripping the tip portion of the canvas 106 and an operation of releasing the grip of the tip portion of the canvas 106. .. The grip portion 18c has a pair of claw portions 18i that open and close with the supply and discharge of compressed air from the pressure source 20. A small air cylinder (not shown) for supplying and discharging compressed air from the pressure source 20 is connected to the pair of claws 18i, and a pair of air cylinders are operated by supplying and discharging compressed air. The claw portion 18i is opened and closed. The grip portion 18c operates so as to grip the canvas 106 when the pulling device 18 pulls out the canvas 106. Then, the grip portion 18c operates so as to release the grip of the canvas 106 when the pulled out canvas 106 is cut and removed. The grip portion 18c is configured to operate based on a command from the control unit 21b of the control device 21 and to control the operation by the control unit 21b.

Further, the grip portion 18c is provided with a grip portion opening / closing detector 18h that detects the opening / closing operation of the pair of claw portions 18i of the grip portion 18c. The grip portion opening / closing detector 18h detects the opening / closing operation of the pair of claw portions 18i of the grip portion 18c, and when the opening / closing operation is detected, transmits the detection result to the control unit 21b of the control device 21 as the grip portion opening / closing detection signal S18q. It is configured to do. The grip portion open / close detector 18h is configured as, for example, an auto switch attached to the air cylinder.

[Removal device]
FIG. 11 is a diagram schematically showing a removal device 19 in the canvas supply mechanism 1. In FIG. 11, along with the removing device 19, the drawing device 18, the canvas tip gripping portion 13, and the upper pulley 3a of the covering processing portion 3 are also schematically shown. The removal device 19 shown in FIGS. 1 and 11 includes a tubular main body 33 and a collection container 34, and sucks out the canvas piece of the canvas 106 pulled out and cut by the drawer device 18 and sucks it out by the tubular main body 33. It is provided as a device for removing the canvas pieces by collecting the sucked canvas pieces in the collection container 34.

The tubular main body 33 is provided with an opening 33a, and the opening 33a is provided so as to penetrate the tubular main body 33 from one end side 33b to the other end side 33c. Further, a guide pipe 20a for guiding compressed air from a pressure source 20 for supplying compressed air is connected to the cylindrical main body 33. The guide tube 20a communicates with the region of the opening portion 33a inside the cylindrical main body portion 33. Further, an orifice 33d is provided in the opening 33a inside the cylindrical main body 33, and the compressed air guided from the guide pipe 20a into the opening 33a passes through the orifice 33d and is opened. It is configured to flow toward the other end side 33c of 33a.

The compressed air taken into the inside of the opening 33a from the guide pipe 20a (for example, compressed air having a pressure of 0.5 MPa) is guided to the orifice 33d provided in the opening 33a. Then, the cut canvas piece guided to the one end side 33b of the opening 33a by the decompression action (ejector effect) generated by the air flow of the compressed air that has passed through the orifice 33d and is injected at high speed is transferred to the opening 33a. It is sucked from one end side 33b and discharged to the outside from the other end side 33c.

The collection container 34 is arranged close to the other end side 33c of the opening portion 33a of the cylindrical main body portion 33. The collection container 34 is provided as a container for collecting the canvas pieces discharged from the other end side 33c of the opening portion 33a of the tubular main body portion 33. Further, the recovery container 34 is configured as, for example, a container in which a large number of communication holes (punching holes) that can communicate with the outside are formed on the partition wall surface that partitions the boundary with the outside. When the canvas piece is discharged into the collection container 34 together with the high-speed airflow from the other end side 33c of the opening 33a of the tubular main body 33, the canvas piece is collected in the collection container 34, and the high-speed airflow is collected. It will flow out from the communication hole of the container 34. The collection container 34 does not have to be arranged close to the other end side 33c of the opening portion 33a of the cylindrical main body portion 33. In this case, for example, the opening 33a of the tubular main body 33 and the collection container 34 are connected by a hose pipe, and the canvas piece discharged with the high-speed air flow is guided to the collection container 34. You may.

As described above, in the removing device 19, the cylindrical main body 33 is configured so that the compressed air from the pressure source 20 is taken into the opening 33a and a negative pressure is generated in the opening 33a. .. Then, in the removing device 19, the tip portion of the canvas 106 is pulled out by the drawing device 18, the canvas 106 is cut at the cut position CP by the cutting device 14, and the canvas piece of the cut canvas 106 is opened by the drawing device 18. When guided to one end side 33b of 33a, the canvas piece is sucked out from the other end side 33c of the opening 33a, so that the canvas piece can be collected in the collection container 34.

According to the removal device 19, the removal device 19 can be configured by using the tubular main body 33 and the collection container 34 having a simple structure. According to the removing device 19, a negative pressure is generated in the opening 33a of the tubular main body 33 to suck in the canvas piece and discharge it to the outside, so that there is no mechanical moving part and the device is inexpensive. In addition to being able to construct the equipment, maintenance and inspection of the equipment can be made almost unnecessary, and maintenance costs can be suppressed.

[Pulling out and excising the tip of the canvas]
In the pulling out and cutting operation of the tip of the canvas, the material seam 23, which is too close to the next scheduled cutting position XP to be the molding seam and causes a problem in belt quality, is detected based on the detection result of the material seam detection unit 16. This is performed when the material seam 23, which poses a problem in terms of belt quality, is not included in the belt molded body 105. The pulling-out operation and the cutting operation (cutting operation and removing operation) of the tip of the canvas will be described with reference to FIGS. 7 to 11.

First, in a state where the material seam 23, which is a problem in belt quality, is not detected, as shown in FIG. 7, in the drawing device 18, the swivel arm 18d stands by at the third angle position corresponding to the swivel position detector 18g. doing.

On the other hand, when the material seam 23 that causes a problem in belt quality is detected and the material seam 23 that causes a problem in belt quality is not included in the belt molded body 105, the control unit 21b draws out the material seam 23. The operation of the device 18 is controlled. By this control, the swivel arm 18d operates so as to swivel from the third angle position to the corresponding first angle position of the swivel position detector 18e. When the swivel arm 18d swivels to the first angle position, the swivel operation of the swivel arm 18d is stopped. The turning operation time of the turning arm 18d at this time is set to, for example, about 1 second.

When the swivel arm 18d swivels and stops at the first angle position, the gripping portion 18c is then operated by the control of the control unit 21b. As shown in FIG. 8, the grip portion 18c operates so as to close the pair of open claw portions 18i and grip the tip portion of the canvas 106 gripped by the canvas tip grip portion 13. As a result, the gripping portion 18c performs a gripping operation of the tip portion of the canvas 106, and the tip portion of the canvas 106 is gripped.

When the gripping portion 18c completes gripping the tip portion of the canvas 106, the control unit 21b then releases the gripping of the clamp 13a of the canvas tip gripping portion 13 so that the swivel arm 18d swivels. At this time, as shown in FIG. 9, the swivel arm 18d operates so as to swivel from the first angle position to the corresponding second angle position of the swivel position detector 18f. When the swivel arm 18d swivels to the second angle position, the swivel operation of the swivel arm 18d is stopped. The turning operation time of the turning arm 18d at this time is set to, for example, about 0.5 seconds. When the swivel arm 18d swivels to the second angle position, the tip portion of the canvas 106 is pulled out from the canvas tip grip portion 13 by a certain length (for example, about 90 mm). When the swivel arm 18d swivels to the second angle position and the canvas 106 for a certain length is pulled out, the clamp 13a of the canvas tip grip portion 13 closes under the control of the control unit 21b, and as shown in FIG. The canvas 106 is also gripped by the clamp portion 13a.

When the tip of the canvas 106 is pulled out by the swivel arm 18d and gripped by the gripping portion 18c and the clamp 13a, the cutting device 14 controls the control unit 21b at the cut position CP shown by the broken line in FIG. , The canvas 106 is cut. As a result, the process of shifting the material seam 23 from the molding seam is completed so that the material seam 23, which poses a problem in belt quality, is not included in the belt molded body 105. Further, when the above cutting is performed, the canvas piece of the canvas 106 gripped by the grip portion 18c is the target to be removed.

When the above cutting process is completed, the swivel arm 18d operates so as to swivel from the second angle position to the third angle position under the control of the control unit 21b. Further, at this time, the operation of the pressure source 20 is controlled by the control of the control unit 21b, the supply of compressed air from the pressure source 20 to the opening portion 33a of the cylindrical main body portion 33 is started, and the removal device 19 is operated. Is started. When the swivel arm 18d swivels to the third angle position, the swivel operation of the swivel arm 18d is stopped. The turning operation time of the turning arm 18d at this time is set to, for example, about 0.5 seconds. When the swivel arm 18d swivels to the third angle position, as shown in FIG. 11, the position of the grip portion 18c moves to the vicinity of one end side 33b of the opening portion 33a of the tubular main body portion 33 of the removing device 19. When the grip portion 18c moves to the vicinity of the one end side 33b of the opening portion 33a, the compressed air is supplied from the pressure source 20 to the opening portion 33a of the cylindrical main body portion 33, and the removing device 19 operates. It is in a state of being. In this state, the grip portion 18c is opened by the control of the control unit 21b, and the grip of the canvas piece is released.

As shown in FIG. 11, when the grip portion 18c is opened at one end side 33b of the opening portion 33a of the tubular main body portion 33 of the operating removal device 19, the canvas piece gripped by the grip portion 18c is opened. It is sucked into the opening 33a from one end side 33b of the hole 33a. The canvas piece sucked into the opening 33a is discharged to the outside from the other end 33c of the opening 33a and collected in the collection container 34. As a result, the operation of removing the canvas piece is completed.

[Pressure source]
The pressure source 20 is configured as an air compressor that generates compressed air, and supplies compressed air to each of the sail cloth tip grip portion 13, the cutting device 14, the grip portion 18c of the extraction device 18, and the removal device 19 that are operated by the compressed air. It is configured as a device to perform. The operation of the pressure source 20 is controlled by the control unit 21b of the control device 21. That is, the supply and stop of the compressed air to each of the canvas tip grip portion 13, the cutting device 14, the grip portion 18c of the pull-out device 18, and the removal device 19 are controlled by the control unit 21b.

As an example, the inventor of the present application sets the inner diameter of the opening 33a of the tubular main body 33 of the removing device 19 to be about 60 mm, and the pressure of the compressed air supplied into the opening 33a to 0.5 MPa. The canvas supply mechanism 1 was carried out. Then, for the canvas 106 having a cross-sectional dimension of about 0.6 mm in thickness and about 50 mm in width, the above-mentioned allowable minimum seam distance A is set to 40 mm, and the withdrawal length of the tip of the canvas 106 by the drawing device 18 is allowed. The length was set to 90 mm by adding twice the safety distance α to twice the minimum seam distance A, and the pulling out and removing operation of the tip of the canvas was verified. As a result, the pulling out and removing operation of the tip of the canvas was smoothly performed, and a piece of canvas having a thickness of about 0.6 mm, a length of 90 mm equivalent to the above-mentioned pulling length, and a width of about 50 mm was cut and collected. It was able to be collected in the container 34.

[Control device]
The control device 21 shown in FIG. 1 is provided as a device that controls the operation of each device of the sail cloth supply mechanism 1 based on various set setting information, and includes a hardware processor such as a CPU, a memory, and various setting information. It is configured to include an input device, an interface circuit, and the like in which an input operation is performed by the user when the information is input. Further, the control device 21 is a setting information storage unit 21a composed of a memory, and a control unit that controls the operation of each device or the like by reading and executing a program stored in the memory by a hardware processor. 21b and the like.

The setting information storage unit 21a stores, as setting information, belt molded body type information, material seam discrimination information, planned cut position information, material seam detection position information, allowable minimum seam distance information, turning operation time information, and the like. It is configured in.

The belt molded body type information is stored in the setting information storage unit 21a as information that defines specifications according to the type of the belt molded body 105. More specifically, the belt molded body type information is information specified according to the type of the belt molded body 105, such as the length information of the belt molded body 105, the thickness information of the canvas 106, and the canvas. Information such as information about the 106 types is stored in the setting information storage unit 21a.

The material seam discrimination information is set for each belt molded body type information, and is controlled based on the step displacement signal S26 transmitted from the step detection unit 26 to the control unit 21b when the step detection unit 26 detects a step. The setting information storage unit 21a stores the information in which the unit 21b determines the threshold value for determining the presence / absence of the material seam 23. In the present embodiment, since the step detection unit 26 detects the amplified displacement obtained by amplifying the displacement amount of the pressing roll 29 by the swing arm 28 as the step, the belt molded body type information (particularly, the thickness of the canvas 106) is detected. The material seam discrimination information that defines the threshold value of the amplification displacement of the step to be recognized as the material seam 23 is stored in the setting information storage unit 21a for each information).

The planned cut position information is stored in the setting information storage unit 21a as information that determines the planned cut position on the canvas supply path 22. Further, the planned cut position information is set for each belt molded body type information, and is used as information that defines the planned cut position XP on the canvas supply path 22 corresponding to the length of the canvas 106 for one roll of the belt ring-shaped body 105. , Stored in the setting information storage unit 21a.

The material seam detection position information is set corresponding to the planned cut position information, and is stored in the setting information storage unit 21a as information that defines the material seam detection position SP on the canvas supply path 22. The allowable minimum seam distance information is set information storage unit 21a as information that defines a predetermined allowable minimum seam distance A that is set as a distance that needs to be separated between the material seam 23 and the molding seam. Is remembered in. The turning operation time information is stored in the setting information storage unit 21a as information that determines the turning operation time of the turning arm 18d of the drawer device 18.

The control unit 21b receives the disconnection detection signal S14 from the disconnection detector 14a, receives the rotation angle detection signal S27 of the detection roll 12c from the position detector 27, and receives the step displacement signal S26 from the step detection unit 26. Further, the control unit 21b reads out the material seam determination information, the planned cut position information, the material seam detection position information, and the allowable minimum inter-seam distance information from the setting information storage unit 21a. Then, the control unit 21b includes a disconnection detection signal S14, a rotation angle detection signal S27 of the detection roll 12c, a step displacement signal S26, a material seam determination information, a cut scheduled position information, a material seam detection position information, and a minimum allowable seam. Based on at least one of the distance information, the operation of the path length adjusting unit 17, the canvas feeding unit 11, the pressure source 20, the operation of the canvas gripping unit displacement mechanism 25, and the operation of the traveling mechanism of the covering processing unit 3 are controlled. It is configured as follows. As a result, the control unit 21b is configured to control a steady operation of supplying the canvas 106 for one roll of the belt ring-shaped body 100 to the covering processing unit 3 for each covering process.

Further, the control unit 21b is configured to control the operations of the path length adjusting unit 17, the canvas feeding unit 11, and the pressure source 20 for each belt molded body type information. More specifically, the control unit 21b performs a non-steady operation when the type of the belt molded body 105 is changed based on the belt molded body type information and the planned cut position information stored in the setting information storage unit 21a. , Control the operation of the path length adjusting unit 17. Then, by the control of the control unit 21b, the setting of the length of the canvas supply path 22 from the cut position CP to the material seam detection position SP is changed for each type of the belt molded body 105.

Further, the control unit 21b compares the detection result of the step based on the step displacement signal S26 received from the step detection unit 26 with the threshold value of the material seam determination information stored in the setting information storage unit 21a, thereby performing the material seam. The presence or absence of 23 is determined, and the material seam 23 is detected.

Further, the control unit 21b calculates the feed amount of the canvas 106 based on the detection signal S27 of the rotation angle of the detection roll 12c received from the position detector 27. Further, the control unit 21b is at the end of cutting the canvas 106 based on the detection signal S27 of the rotation angle of the detection roll 12c received from the position detector 27 and the cut detection signal S14 received from the cut detector 14a. , The material seam distance D1 which is the distance traced back from the cut position CP in the material seam current position PP which is the current position of the material seam 23 on the canvas supply path 22 detected by the position detector 27 is calculated. That is, the control unit 21b traces back from the cut position CP in the material seam current position PP in order to identify the position of the detected material seam 23 on the canvas supply path 22 at the end of cutting the canvas 106. The material seam distance D1, which is the distance, is calculated.

Further, the control unit 21b is within a range of a distance less than the allowable minimum seam distance A with respect to the next scheduled cutting position XP to be the molding seam at the end of cutting the canvas 106 determined based on the cut detection signal S14. In order to detect the material seam 23 that is too close and causes a problem in belt quality, the following non-determination is executed.

In the non-determination, the control unit 21b is the distance between the material seam distance D1 obtained by the above calculation and the molding seam distance D0 which is the distance traced back from the cut position CP to the planned cut position XP. Calculate the planned distance between seams (| D1-D0 |). Next, in this non-determination, the control unit 21b determines whether or not the planned distance between seams (| D1-D0 |) and the allowable minimum distance between seams A have the relationship of the following equation (1).
| D1-D0 | <A ... (1)

Further, in the non-determination, when the control unit 21b determines that the equation (1) is applicable, the relationship between the molding seam distance D0 and the material seam distance D1 is further related to the equation (2) below. Judge whether or not.
D1 ≤ D0 ... (2)

When the determination based on the above equations (1) and (2) is executed, the execution of the non-determination is completed. Then, the control unit 21b controls the operation of at least one of the path length adjusting unit 17, the canvas feeding unit 11, and the pressure source 20 based on the above-mentioned non-determination result at the end of cutting the canvas 106. ..

Further, the control unit 21b has a grip portion opening / closing detection signal S13 received from the grip portion opening / closing detector 13b, a grip portion opening / closing detection signal S18q received from the grip portion opening / closing detector 18f, and a turning position detector (18e, 18f, 18g). The operation of the sail cloth tip gripping portion 13, the cutting device 14, the drawing device 18, the removing device 19, and the pressure source 20 is controlled based on the turning position signal S18p received from and at least one of the turning operation time information. It is configured in. Further, the control unit 21b is configured to control the operations of the canvas tip gripping unit 13, the cutting device 14, the drawing device 18, the removing device 19, and the pressure source 20 based on the result of the non-determination described above. ..

[Treatment of material seams that pose a problem in belt quality]
Next, a process in the canvas supply mechanism 1 for preventing the material seam 23, which poses a problem in belt quality, from being included in the belt molded body 105 will be described. FIG. 12 is a flowchart for explaining a process for preventing the material seam 23, which poses a problem in belt quality, from being included in the belt molded body 105.

The process shown in FIG. 12 is performed at the timing when the covering process is completed in each covering process. When the cutting device 14 cuts the canvas 106 at the timing just before the end of the covering process (step S101), the cutting detector 14a detects the end of cutting of the canvas 106 and controls the cutting detection signal S14. It is transmitted to 21b (step S102).

Upon receiving the disconnection detection signal S14, the control unit 21b determines that the canvas 106 has been disconnected and starts the process of step S103. In step S103, first, the control unit 21b is the material that is the current position of the material seam 23 on the canvas supply path 22 detected by the position detector 27, and is the distance that is traced back from the cut position CP in the material seam current position PP. The seam distance D1 is calculated. Further, the control unit 21b sets the planned seam distance (| D1-D0 |), which is the distance between the material seam distance D1 and the molding seam distance D0, which is the distance traced back from the cut position CP to the planned cut position XP. Calculate. Then, the control unit 21b determines whether or not the planned distance between seams (| D1-D0 |) and the allowable minimum distance between seams A satisfy the relationship of | D1-D0 | <A (step S103).

If it is determined in step S103 that the relationship of | D1-D0 | <A is satisfied (steps S103, Yes), further, does the molding seam distance D0 and the material seam distance D1 satisfy the relationship of D1 ≦ D0? Whether or not it is determined (step S104). When it is determined that it corresponds to step S104 (step S104, Yes), the control unit 21b determines | D1-D0 | (absolute value) <A and D1 ≦ D0, and the material seam current position PP is set to the next time. It is determined that the position is the same as the planned cut position XP, or is within the range of less than the allowable minimum seam distance A immediately before the next scheduled cut position XP.

Note that FIG. 13 is a diagram schematically showing the material seam detection unit 16 and its vicinity, and shows a state in which the material seam 23 and the planned cut position XP are close to each other within a range of less than the allowable minimum seam distance A. Is. The case shown in FIG. 13 is a case where it is determined to correspond to step S104, and the material seam current position PP is the allowable minimum seam distance immediately before the next cut scheduled position XP (closest on the covering processing unit 3 side). This is a case where it is determined that the distance is less than A. In FIG. 13, the range of less than the allowable minimum seam distance A on each of the canvas feeding portion 11 side and the covering processing portion 3 side from the next scheduled cutting position XP is indicated by the arrows at both ends of the distance A. Further, in FIG. 13, the range of the planned joint distance (| D1-D0 |), which is the distance between the current material seam position PP and the next scheduled cut position XP, is indicated by the arrows at both ends of the distance | D1-D0 |. Shown. Further, in FIG. 13, the distance between the material seam detection position SP and the next planned cut position XP (allowable minimum seam distance A + safe distance α) is indicated by the arrows at both ends of the distance A + α.

If it is determined that the step S104 corresponds to | D1-D0 | <A and D1 ≦ D0, the position is the same as the next cut scheduled position XP or the next cut scheduled position at the end of cutting the canvas 106. It is determined that the material seam 23 existing immediately before the XP is the material seam 23 that is too close to the next cut scheduled position XP, which is the molding seam, and causes a problem in belt quality. Therefore, the process of step S105 is executed so that the portion of the material seam 23 that becomes a problem is not included in the belt molded body 105.

In step S105, before the next covering process, that is, prior to the next covering process of the belt molded body 105, an appropriate amount of the tip portion of the canvas 106 is applied (at least by the length of the allowable minimum seam distance A). A process of pulling out and excising (cutting and removing) this is performed. As a result, the material seam 23 in question is displaced from the planned cut position XP, which is the molding seam, so that the material seam 23, which is a problem in terms of belt quality, is not included in the belt molded body 105. In step S105, as described above, the drawing device 18, the canvas tip gripping portion 13, the cutting device 14, and the removing device 19 are operated by the control of the control unit 21b, so that the canvas tip is pulled out and cut. Will be done. As a result, the material seam 23, which poses a problem in belt quality, is not included in the belt molded body 105. By operating the drawing device 18 or the like based on the control of the control unit 21b, the canvas tip is automatically pulled out and cut, but the canvas tip is pulled out and cut manually. It may be done in response.

Since the cutting device 14 operates in step S105, when step S105 is completed, the determination in step S102 is executed again. In the process of step S105, if the material seam 23, which is a problem in terms of belt quality, is not included in the belt molded body 105, it is determined in step S103 that | D1-D0 | ≧ A.

If it is determined that it corresponds to step S103, the determination of step S104 is performed, and if it is determined that it does not correspond to step S104 (step S104, No), the control unit 21b | D1-D0 | (absolute value) <A, In addition, it is determined that D1> D0, and the material seam current position PP is within the range of less than the allowable minimum seam distance A immediately after the next planned cut position XP.

In this case, at the end of cutting the canvas 106, the material seam 23 existing immediately after the next planned cutting position XP is too close to the next scheduled cutting position XP, which is the molding seam, at the material seam 23, which causes a problem in belt quality. It is judged that there is. Therefore, the process of step S106 is executed so that the portion of the material seam 23 that becomes a problem is not included in the belt molded body 105.

In step S106, after the next covering treatment, that is, immediately after the covering treatment of the next belt molded body 105, an appropriate amount of the tip portion of the canvas 106 is applied (at least by the length of the allowable minimum seam distance A). A process of pulling out and excising (cutting and removing) this is performed. As a result, the material seam 23 in question is displaced from the planned cut position XP, which is the molding seam, so that the material seam 23, which is a problem in terms of belt quality, is not included in the belt molded body 105. In step S106, as described above, the drawing device 18, the canvas tip gripping portion 13, the cutting device 14, and the removing device 19 are operated by the control of the control unit 21b, so that the canvas tip is pulled out and cut. Will be done. As a result, the material seam 23, which poses a problem in belt quality, is not included in the belt molded body 105.

Since the cutting device 14 operates in step S106, when step S106 is completed, the determination in step S102 is executed again. In the process of step S106, if the material seam 23, which is a problem in terms of belt quality, is not included in the belt molded body 105, it is determined in step S103 that | D1-D0 | ≧ A.

If it is determined that it does not correspond to step S103 (step S103, No), the control unit 21b determines | D1-D0 | (absolute value) ≥ A, and the material seam current position PP is the next cut scheduled position XP. It is judged that the distance is not within the range of less than the allowable minimum seam distance A before and after (immediately after and immediately after). In this case, at the end of cutting the canvas 106, the material seam 23 existing at the same position as the next planned cut position XP or before and after (immediately before and immediately after) the next planned cut position XP is the next planned cut position XP which is the molding seam. It is judged that the material seam 23 is not too close to the belt and does not pose a problem in terms of belt quality. Therefore, the process shown in FIG. 12 is temporarily completed, and a series of canvas supply operations for the steady covering process is started.

[Action effect]
According to the canvas supply mechanism 1 of the present embodiment, the step of the material seam 23 passing over the detection roll 12c arranged at a predetermined position on the canvas supply path 22 is detected by the step detection unit 26. Then, the current position on the canvas supply path 22 of the material seam 23 detected as a step by the step detection unit 26 is tracked by the position detector 27. Therefore, the material seam 22 can be detected without stopping the transport of the canvas 106 while supplying the canvas 106 from the canvas feeding section 11 to the covering processing section 3. Therefore, like the canvas supply mechanism of Patent Document 2, the supply of the canvas 106 is sequentially stopped in order to detect the material seam 23 at each covering process, and then the moving means such as the moving cylinder or the like. It becomes unnecessary to move the means for detecting the material seam 23 relative to the canvas 106. Therefore, no extra loss time is generated for each covering process, and extra cost and space for the above-mentioned transportation means are not required, which reduces the productivity of the wrapped belt. Can be prevented.

Further, according to the present embodiment, the path length adjusting unit 17 allows the material seam detection position SP to be at least more permissible than the planned cut position XP which will be the molding seam in the next covering process for each type of the belt molded body 105. The length of the canvas supply path 22 can be adjusted so that the position is on the canvas supply path 22 that goes back to the canvas feeding portion 11 side by the minimum seam distance A. As described above, according to the present embodiment, the type of the belt molded body 105 is changed by interlocking the path length adjusting unit 17 and the material seam detecting unit 16, and in particular, the length of the belt molded body 105 is changed. Even in this case, the material seam detection position SP and the next cut scheduled position XP can always be maintained in a state of being close to each other within a range separated by at least the allowable minimum seam distance A. That is, the material seam detection position SP is set closer to the canvas feeding portion 11 than the planned cut position XP so that the distance between the material seam detection position SP and the next scheduled cut position XP is equal to the allowable minimum seam distance A. Can be maintained at a position retroactive by the minimum allowable inter-seam distance A. Alternatively, the distance between the material seam detection position SP and the next planned cut position XP is equal to the distance (A + α) obtained by adding the safety distance α, which is a predetermined margin, to the allowable minimum seam distance A. The material seam detection position SP can be maintained at a position that is advanced by a distance (A + α) from the planned cut position XP to the canvas feeding portion 11 side. For this reason, the material seam 23, which is too close to the next planned cut position XP before and after the next planned cut position XP, which is the molding seam, within a distance range of less than the allowable minimum seam distance A, which causes a problem in belt quality. Can be maintained reliably. That is, the material seam detection position SP and the next cut scheduled position are not always maintained in a state of being close to each other within a range of at least the allowable minimum seam distance A, and the path length between the two positions becomes long. Compared to the case where the tracking accuracy of the current position of the material seam 23 can be reduced, the range of the distance less than the allowable minimum seam distance A with respect to the next planned cut position XP before and after the next planned cut position XP which is the molding seam. It is possible to reliably maintain the detection of the material seam 23, which is too close to each other and causes a problem in belt quality.

Further, according to the present embodiment, since the material seam 23, which is too close to the next scheduled cutting position XP to be the molding seam and causes a problem in belt quality, can be reliably detected, the canvas tip gripping portion is based on the detection result. By operating 13 and the cutting device 14, the material seam 23, which poses a quality problem, can be removed so as not to be included in the belt molded body 105.

Therefore, according to the present embodiment, the material of the canvas 106, which poses a problem in belt quality because it is too close to the next planned cutting position XP, which is the molding seam, during the covering process without lowering the productivity of the wrapped belt. It is possible to provide a canvas supply mechanism 1 for covering a belt molded body, which can reliably detect the seam 23 and prevent the material seam 23, which poses a quality problem, from being included in the belt molded body 105. can.

Further, according to the present embodiment, the swing tip portion 28b of the swing arm 28 is held in a state where the canvas 106 is sandwiched between the detection roll 12c and the holding roll 29 that can swing with respect to the detection roll 12c. The contacting displacement sensor 30 makes it possible to easily detect a step in the material seam 23. Further, according to the present embodiment, the rubberizing process is performed by adjusting the own weight (dead weight) of the cantilever type swing arm 28 that sandwiches the canvas 106 between the detection roll 12c and the pressing roll 29. The canvas 106, which is configured as a biased canvas or the like, can be easily set so as not to be excessively stretched or excessively loosened. That is, by adjusting the weight of the swing arm 28, a contact resistance is applied to the canvas 106, and the canvas 106 is excessively extended on the covering processing unit 3 side of the detection roll 12c, or conversely, the canvas 106 is stretched. It can be easily set so that the canvas 106 does not slip on the detection roll 12c and loosen excessively on the covering processing unit 3 side of the detection roll 12c.

Further, according to the present embodiment, by adjusting the length of the swing arm 28 or the position of the holding roll 29 on the swing arm 28, the displacement amount of the holding roll 29 is amplified at the swing tip portion 28b, and the material seam is formed. 23 can be reliably detected. For example, even when the displacement amount of the holding roll 29 is about 0.6 mm, which is about the thickness of a general sail cloth, the length of the swing arm 28 or the position of the holding roll 29 on the swing arm 28 is adjusted. Therefore, the displacement amount of the swing tip portion 28b can be amplified to several times or more than the displacement amount of the holding roll 29, and the material seam 23 can be reliably detected. Therefore, the material seam 23 can be detected more reliably than in the case of a configuration in which the actual step cannot be amplified and output.

Further, according to the present embodiment, since the position detector 27 is an encoder that detects the rotation angle of the detection roll 12c, not only the feed amount of the canvas 106 but also the current position on the canvas supply path 22 of the material seam 23 Can be easily tracked.

Therefore, according to the present embodiment, in each covering process, the supply of the canvas 106 is sequentially stopped and then moved in order to detect the material seam 23, as in the canvas supply mechanism of Patent Document 2. Even if the means for detecting the material seam 23 by a moving means such as a cylinder is not moved relative to the canvas 106, the material seam 23 can be easily and surely detected within a series of steady canvas supply operations. , It can be reliably realized that the current position of the material seam 23 on the canvas supply path 22 can be easily tracked. Thereby, the decrease in the productivity of the wrapped belt can be more reliably eliminated.

Further, according to the present embodiment, since the detection roll 12c of the material seam detection unit 16 is a crown roll having a large diameter at the central portion in the axial direction with respect to both ends, it passes over the detection roll 12c. It is possible to suppress the meandering of the canvas 106. Further, the angle formed by the canvas 106 extending from the detection roll 12c to the canvas feeding portion 11 side and the covering processing portion 3 side is an acute angle (that is, less than 90 °), so that the winding angle around the detection roll 12c becomes large. It is provided in. Therefore, when the canvas 106 passes over the detection roll 12c of the material seam detection unit 16, the canvas 106 may slip or wrinkles or twists may occur as if it were wavy in the canvas 106. It can be suppressed. Therefore, according to the present embodiment, the tension applied to the canvas 106 supplied on the canvas supply path 22 and the load for sandwiching the canvas 106 between the detection roll 12c and the holding roll 29 are set to be relatively weak. Even in this case, it is possible to prevent the state of the portion holding the canvas 106 from becoming unstable and the step difference of the portion of the material seam 23 from being reliably detected.

Further, according to the present embodiment, the cutting detection signal S14, the rotation angle detection signal S27 of the detection roll 12c, the step displacement signal S26, the material seam discrimination information, the planned cut position information, the material seam detection position information, and the minimum allowable limit. A control unit 21b for controlling the operation of the path length adjusting unit 17, the canvas feeding unit 11, and the pressure source 20 is provided based on at least one of the distance information between the seams. Therefore, it is possible to easily achieve automation of the operation of the pressure source 20 for operating the path length adjusting unit 17, the canvas feeding unit 11, and the cutting device 14 based on the control of the control unit 21b. Further, since the operations of the path length adjusting unit 17, the canvas feeding unit 11, and the pressure source 20 are controlled for each belt molded body type information, even if the type of the belt molded body 105 is changed, the path length adjusting unit 17. It can be easily achieved to automate the operation of the pressure source 20 for operating the canvas feeding unit 11 and the cutting device 14 based on the control of the control unit 21b.

Further, according to the present embodiment, at the end of cutting the sail cloth 106, the planned seam distance (| D1-D0 |), which is the distance between the material seam distance D1 and the molding seam distance D0, is calculated, and the seam distance is planned. Whether or not the distance (| D1-D0 |) is less than the allowable minimum inter-seam distance A, and further, if the planned inter-seam distance (| D1-D0 |) is less than the permissible minimum inter-seam distance A, the material seam The non-determination is performed to determine whether or not the distance D1 is equal to or less than the molding seam distance D0. Then, based on the result of the non-determination, the operation of at least one of the path length adjusting unit 17, the canvas feeding unit 11, and the pressure source 20 for operating the cutting device 14 is controlled. Therefore, based on the above-mentioned non-determination result, the operation of the canvas supply mechanism 1 is controlled, and the canvas supply mechanism 1 approaches the next planned cut position XP, which is the molding seam, within a range of a distance less than the allowable minimum seam distance A. It is possible to automatically and surely control the operation of detecting the material seam 23, which is too problematic in terms of belt quality.

In the non-judgment, if the planned seam distance (| D1-D0 |) is less than the allowable minimum seam distance A, it is less than the permissible minimum seam distance A for the next planned cut position XP to be the molding seam. The presence of the material seam 23, which is too close in the range of the above distance and causes a problem in belt quality, will be detected. On the other hand, if the planned seam distance (| D1-D0 |) is greater than or equal to the allowable minimum seam distance A, the distance is less than the permissible minimum seam distance A with respect to the next planned cut position XP to be the molding seam. It will be detected that there is no material seam 23 that is too close and causes a problem in belt quality. Further, when the planned seam distance (| D1-D0 |) is less than the allowable minimum seam distance A and the material seam distance D1 is less than or equal to the molding seam distance D0, the next planned cutting position to be the molding seam. The material seam 23, which is too close to XP within a distance range less than the allowable minimum seam distance A and causes a problem in belt quality, is at the same position as the next planned cut position XP, which is the molding seam, or the next planned cut position. It is detected that it exists on the covering processing unit 3 side of the XP. On the other hand, when the planned seam distance (| D1-D0 |) is less than the allowable minimum seam distance A and the material seam distance D1 is larger than the molding seam distance D0, the next planned cutting position to be the molding seam. The material seam 23, which is too close to XP within a distance range less than the allowable minimum seam distance A and causes a problem in belt quality, exists on the sail cloth feeding portion 11 side of the next planned cutting position XP, which is the molding seam. Is detected. According to the present embodiment, based on these non-determination results, the operation of the canvas supply mechanism 1 is controlled within a range of a distance less than the allowable minimum seam distance A with respect to the next planned cut position XP to be the molding seam. It is possible to automatically and surely control the operation of detecting the material seam 23, which is too close and causes a problem in belt quality.

Further, according to the present embodiment, the material seam 23, which is too close to the next scheduled cut position XP to be the molding seam within the range of the allowable minimum seam distance A or less, is detected, which causes a problem in belt quality. Occasionally, the drawer device 18 can be activated to pull out an appropriate amount of the tip of the canvas for excision. As a result, the material seam 23, which poses a problem in terms of belt quality, can be easily displaced from the next scheduled cutting position XP, which is the molding seam. Then, the canvas piece that has been pulled out and cut off can be sucked out by the removing device 19 and collected and removed. Therefore, according to the present embodiment, the material seam 23, which is too close to the next scheduled cutting position XP to be the molding seam and causes a problem in belt quality, is easily displaced from the molding seam and separated from the material, which causes a problem in belt quality. The process in which the seam 23 is not included in the belt molded body 105 can be easily executed.

Further, according to the present embodiment, the control unit 21b further bases the canvas tip based on at least one of the grip portion open / close detection signal S13, the grip portion open / close detection signal S18q, the turning position signal S18p, and the turning operation time information. It controls the operation of the grip portion 13, the cutting device 14, the pulling device 18, the removing device 19, and the pressure source 20 that operates the canvas tip grip portion 13, the cutting device 14, the grip portion 18c, and the removing device 19. Therefore, the operation of the canvas tip grip portion 13, the cutting device 14, the pulling device 18, the removing device 19, and the pressure source 20 for operating the canvas tip grip portion 13, the cutting device 14, the grip portion 18c, and the removing device 19 is operated. Automation based on the control of the control unit 21b can be easily achieved.

Then, according to the present embodiment, the operation of the canvas tip gripping portion 13, the cutting device 14, the drawer device 18, the removing device 19, and the pressure source 20 can be automated by the control of the control unit 21b, so that the canvas tip portion 13 is used. The operation related to the process of pulling out and excising can be reliably and automatically executed in a very short time. As a result, in addition to reliably detecting the material seam 23, which is a problem in terms of belt quality because the material seam 23 is too close to the next scheduled cutting position XP, which is the molding seam, the material seam 23, which is a problem in terms of belt quality, is the belt molded body 105. It can be reliably and automatically executed in a short time, including the control of the process for preventing the belt from being included in the belt, and the decrease in the productivity of the wrapped belt can be more reliably eliminated.

Further, according to the present embodiment, the operations related to the pulling out and excision processing of the tip of the canvas are automated, and this operation can be completed in a very short time (about 5 seconds). Therefore, during the steady operation of the molding apparatus 2, for about 10 seconds, the supply of the canvas 106 is temporarily stopped for a very short time (mainly, the belt ring-shaped body 100 is set in the traveling mechanism and the belt molded body 105 is traveled. It could be completed with a margin during the time (the time when the removal from the mechanism is automatically performed). Therefore, in addition to reliably detecting the material seam 23 of the canvas 106, which poses a problem in belt quality, the wrapped belt includes a process of preventing the material seam 23 from being included in the belt molded body 105. It was found that the productivity of the product was not reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. For example, the following modification may be carried out.

(1) In the above-described embodiment, the case where the canvas to be wrapped around the surface of the belt ring-shaped body is one layer has been described as an example, but this may not be the case. The canvas supply mechanism for covering the belt molded body has a plurality of canvas supply paths (for example, canvases) in which a plurality of canvases are independently provided according to the number of layers of canvases wound around the surface of the belt ring. In the case of two layers, even if it is provided in the molding apparatus of the belt molded body so that the canvas can be supplied to one covering processing unit via the lower canvas supply mechanism and each canvas supply path of the upper canvas supply mechanism). good. Further, in that case, one control unit may be configured to control a series of operations of each canvas supply mechanism.

(2) In the above-described embodiment, a mode in which a series of operations executed by the canvas supply mechanism is controlled by the control unit has been described as an example, but this may not be the case. A series of operations executed by the canvas supply mechanism may be performed manually without being controlled by the control unit (without computer control).

(3) In the above-described embodiment, the pulling out and cutting process of the tip of the canvas is based on the control of the control unit so that the detected material seam portion that causes a problem in belt quality is not included in the belt molded body. Although the automatic mode has been described as an example, it does not have to be the same. The tip of the canvas may be pulled out and cut out manually so that the detected material seam, which poses a problem in belt quality, is not included in the belt molded body.

(4) The canvas supply mechanism of the above-described embodiment is a molding device for a belt molded body in which only the covering process is exclusively performed, and the belt molded body is removed from the traveling mechanism and the next belt ring-shaped body. It may be applied to the molding apparatus of the belt molded body in which the setting to the traveling mechanism is performed manually. Further, the canvas supply mechanism of the above-described embodiment is applied to a molding apparatus for a belt molded body in which skiving treatment and covering treatment are performed on the belt ring-shaped body traveling between a pair of pulleys in the traveling mechanism. You may.

INDUSTRIAL APPLICABILITY In the process of manufacturing a wrapped belt such as a wrapped V-belt, the present invention covers the canvas when the covering process performs the covering process of winding the canvas around the surface of the belt ring-shaped body along the circumferential direction. It can be widely applied to a canvas supply mechanism for covering a belt molded body for supplying to a portion.

1 Canvas supply mechanism for covering the belt ring 3 Covering processing part 11 Canvas feeding part 12 Receiving roll 12c Detection roll 12d Moving roll 13 Canvas tip gripping part 14 Cutting device 16 Material seam detection part 17 Path length adjusting part 22 Canvas supply route 23 Material seam 26 Step detector 27 Position detector 100 Belt ring 105 Belt molded 106 Canvas

Claims (5)

A covering process is performed in which the canvas is wrapped around the surface of the belt ring-shaped body along the circumferential direction, and a molding seam which is a seam portion where the longitudinal ends of the cut canvas are joined to each other is provided to form the belt molded body. A covering process of a belt molded body capable of supplying the canvas to the covering processing section to be performed via a canvas supply path formed along a plurality of receiving rolls around which the canvas unwound from the canvas feeding section is wound. It is a canvas supply mechanism for
A canvas tip gripping portion that grips the tip of the canvas on the downstream side of the canvas supply path, which is a path for supplying the canvas from the canvas feeding portion to the covering processing portion.
A cutting device capable of cutting a portion of the canvas gripped by the canvas tip gripping portion on the covering processing portion side at a predetermined cutting position.
Detection that the material seam, which is a portion of the canvas as a material that is overlapped and joined at predetermined intervals in the longitudinal direction, is one of the plurality of receiving rolls and is arranged at a predetermined position on the canvas supply path. A material having a step detection unit that detects a step in the thickness direction of the material seam on the roll, and a position detector that can track the current position of the material seam detected as the step on the canvas supply path. Seam detector and
By moving the position of the moving roll which is one of the plurality of receiving rolls and is arranged on the canvas supply path, the length of the canvas supply path can be adjusted for each type of the belt molded body. Equipped with a route length adjustment unit
The path length adjusting unit is at the predetermined position on the canvas supply path, and the material seam detecting position where the material seam detecting unit detects the material seam is the same as one roll of the belt molded body from the cut position. At least the material seam and the molding are more than the planned cutting position, which is a position traced back on the canvas supply path by a distance corresponding to the length of the canvas and will be the molding seam in the next covering process. The canvas supply is provided so as to be a position on the canvas supply path traced back to the canvas feeding portion side by a predetermined allowable minimum seam distance set as a distance required to be separated from the seam. Ri adjustable der the length of the path,
The step detection unit
With the detection roll
It is arranged so as to face the detection roll, and is provided at an intermediate portion in the longitudinal direction of the cantilever swing arm so as to be swingably supported by the detection roll and along the detection roll. A holding roll that holds the canvas to be transported, and
It has a contact-type displacement sensor that comes into contact with the swing tip of the swing arm.
The position detector is a canvas supply mechanism for covering a belt molded product, which is an encoder that detects the rotation angle of the detection roll. The canvas supply mechanism for covering a belt molded body according to claim 1.
The detection roll is a crown roll in which the diameter of the central portion in the axial direction is larger than the diameter of both end portions.
A canvas supply mechanism for covering a belt molded body, characterized in that the angle formed by the canvas extending from the detection roll to the canvas feeding portion side and the covering processing portion side, respectively, is an acute angle. The canvas supply mechanism for covering a belt molded product according to claim 1 or 2.
A cutting detector that detects the end of cutting of the canvas by the cutting device and transmits it as a cutting detection signal.
A pressure source that supplies compressed air to the cutting device that operates with compressed air,
It is set for each of the belt molded body type information and the belt molded body type information that define the specifications according to the type of the belt molded body, and when the step is detected by the step detection unit, the step detection unit is used. Material seam determination information that defines a threshold for determining the presence or absence of the material seam based on the transmitted step displacement signal, cut schedule position information that determines the cut schedule position on the sail cloth supply path, and the cut schedule position. In addition to being set in response to the information, the material seam detection position information that defines the material seam detection position on the sail cloth supply path and the permissible minimum seam distance information that defines the permissible minimum seam distance are stored. Setting information storage unit and
The disconnection detection signal received from the disconnection detector, the rotation angle detection signal of the detection roll received from the position detector, the step displacement signal received from the step detection unit, the material seam discrimination information, and the cut. A control unit that controls the operation of the path length adjusting unit, the sail cloth feeding unit, and the pressure source based on at least one of the planned position information, the material seam detection position information, and the allowable minimum inter-seam distance information. When,
Further prepare
The control unit
Based on the detection signal of the rotation angle of the detection roll received from the position detector, the feed amount of the canvas and the current position of the material seam on the canvas supply path detected by the position detector. The material seam distance D1, which is the distance traced back from the cut position at the current position of a certain material seam, is calculated.
It is the distance between the material seam distance D1 and the molding seam distance D0, which is the distance traced back from the cut position to the planned cut position, at the time when the cutting of the canvas is completed, which is determined based on the cut detection signal. The planned distance between seams (| D1-D0 |) is calculated, and it is determined whether or not the planned distance between seams (| D1-D0 |) and the allowable minimum seam distance A have the relationship of the following equation (1). In addition, if the equation (1) is applicable, the non-determination for determining whether the molding seam distance D0 and the material seam distance D1 have the relationship of the following equation (2) is further executed.
The operation of the path length adjusting unit, the canvas feeding unit, and the pressure source is controlled for each belt molded body type information.
Belt molding, characterized in that the operation of at least one of the path length adjusting portion, the canvas feeding portion, and the pressure source is controlled based on the result of the non-determination at the end of cutting the canvas. A canvas supply mechanism for body covering.
| D1-D0 | <A ... (1)
D1 ≤ D0 ... (2) The canvas supply mechanism for covering a belt molded product according to any one of claims 1 to 3.
It has a swivel arm having a grip portion attached to a rotary shaft connected to a swivel drive unit and capable of gripping the tip portion of the canvas, and the swivel arm holds the canvas in a state where the grip portion grips the canvas. A pull-out device that pulls out the canvas by turning around,
An opening portion is provided, and the compressed air from a pressure source that supplies compressed air is taken into the opening portion and has a tubular main body portion that generates a negative pressure in the opening portion. When the tip of the canvas is pulled out, the canvas is cut at the cut position by the cutting device, and the cut canvas piece of the canvas is guided to one end side of the opening by the drawing device. A removal device capable of collecting the canvas piece by sucking the canvas piece from the other end side of the opening portion to the outside.
A canvas supply mechanism for covering a belt molded body, which is characterized by further comprising. The canvas supply mechanism for covering the belt molded body according to claim 3.
It has a swivel arm having a grip portion attached to a rotary shaft connected to a swivel drive unit and capable of gripping the tip portion of the canvas, and the swivel arm holds the canvas in a state where the grip portion grips the canvas. A pull-out device that pulls out the canvas by turning around,
An opening portion is provided, and the compressed air from a pressure source that supplies compressed air is taken into the opening portion and has a tubular main body portion that generates a negative pressure in the opening portion. When the tip of the canvas is pulled out, the canvas is cut at the cut position by the cutting device, and the cut canvas piece of the canvas is guided to one end side of the opening by the drawing device. A removal device capable of collecting the canvas piece by sucking the canvas piece from the other end side of the opening portion to the outside.
A grip opening / closing detector that detects the opening / closing operation of the canvas tip grip and transmits it as a grip opening / closing detection signal.
A grip opening / closing detector that detects the opening / closing operation of the grip and transmits it as a grip opening / closing detection signal.
A swivel position detector that detects the swivel position of the swivel arm around the rotation axis and transmits it as a swivel position signal.
The pressure source that supplies compressed air to the canvas tip grip portion, the cutting device, the grip portion, and the removing device that are operated by compressed air.
Further prepare
The setting information storage unit stores the turning operation time information that defines the turning operation time of the turning arm, and stores the turning operation time information.
The control unit includes a grip opening / closing detection signal received from the grip opening / closing detector, a grip opening / closing detection signal received from the grip opening / closing detector, and a turning position signal received from the turning position detector. And, based on at least one of the turning operation time information, the operation of the canvas tip gripping portion, the cutting device, the drawing device, the removing device, and the pressure source is controlled.
The control unit controls the operation of the canvas tip gripping portion, the cutting device, the drawing device, the removing device, and the pressure source based on the result of the non-determination. Canvas supply mechanism for covering processing.

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