JP2013071824A - Operating method and operating device of press roll in high-speed conveying equipment of sheet body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure accuracy with respect to a conveying attitude and a conveying speed of a sheet body even if there arises a difference between abutment times of a plurality of press rolls in high-speed conveying equipment of the sheet body such as a single veneer, a cardboard or the like.SOLUTION: In the conveying equipment where a plurality of press rolls 2 capable of idling are pivoted on an upper part of a roll conveyor 1 for conveying a single veneer 7 fast by a swingable swing arm 3 and are arranged to hoist freely to a thickness direction of the single veneer 7, an operating mechanism 4 is locked to the swing arm 3, and the single veneer 7 is pressed against the roll conveyor 1 by the press rolls 2 lowered forcibly via the operating mechanism 4 to convey it fast, compressed air is timely jetted towards a windmill-shaped wind receiving member 2a attached to the press roll 2 via a jetting member 5 of the compressed air, thereby idling the press rolls 2 to be lowered towards the single veneer 7 in advance at a peripheral speed based on a conveying speed of the roll conveyor 1 by a feeble driving force of the degree enough to idle the press rolls 2.

Description

  The present invention relates to a pressing roll operating method and operating device in a high-speed sheet conveying apparatus.

  Conventionally, when transporting a sheet of veneer veneer, cardboard, metal sheet, etc. using a transport device consisting of a roll conveyor, belt conveyor, etc., a presser roll is used to ensure the accuracy of the transport posture and transport speed. It is a conventional means, and generally, a plurality of press rolls that can be driven and rotated are placed on the upper part of the conveying device so as to be movable up and down. Each presser roll is driven to rotate directly in contact with the conveying device by its own weight, and when the sheet body passes, each presser roll rises according to the thickness of the sheet body and is driven. Although it can be transported as desired without any particular problem by being configured to rotate, for example, when the sheet body is transported from the previous stage (previous process) to the transport device, the transport height is different (loading) If the height is high) or For example, when the front end of the sheet body is warped upward, the front end of the sheet body may collide with the presser roll or get over the presser roll, and smooth conveyance can be performed. Disappear.

  Accordingly, when the carry-in height of the sheet member carried into the carrying device is different from the carrying height of the carrying device, etc., as disclosed in Patent Document 1, a plurality of press rolls that can be driven and rotated are provided. And an operating mechanism comprising a fluid cylinder or the like is locked to the presser roll (indirect locking form via various arms or the like is common), and the presser roll is There has been proposed an improved technique for optimizing the conveyance by forcibly ascending and descending in a timely manner.

Japanese Utility Model Publication No. 5-75242

  Thus, according to the configuration of the improved technology, each press roll can be accelerated through the sheet body until reaching the same peripheral speed as the transport speed of the transport device by contacting the sheet body when descending. Although it is an indispensable requirement, for example, when the conveyance speed of the sheet body is relatively low, there is no problem if there is a relatively slow acceleration, and there is room in time. In the case where it is relatively heavy and has a good connection with the conveying device (when a relatively large friction conveying force is generated), the follower resistance of the presser roll is much smaller than the conveying force of the sheet body. Since there is a margin in power, smooth conveyance can be performed without any problem.

  However, when the conveying speed of the sheet body is relatively high, or / and when the sheet body is relatively light and lacks the connectivity with the conveying device, such as veneer veneer / cardboard (relatively small friction). In the case where only the transport force is generated), when the sheet body accelerates each presser roll until it reaches the same peripheral speed as the transport speed of the transport apparatus, As a result, there is a difference in the contact timing of the presser rolls on the left and right in the direction orthogonal to the sheet conveyance direction, and the driven rotation becomes unbalanced (a plurality of presser rolls can be freely driven and rotated individually. If it is provided, there will be a difference in peripheral speed between the press roll that has previously contacted the sheet body and the press roll that has contacted the sheet body later), or there is an unbalanced braking force. Because it works (multiple presser rolls rotate , It is biased to either the left or right side in the direction orthogonal to the conveyance direction of the sheet body, and the follower resistance of all the press rolls is added.) As a result, the conveyance posture of the sheet body is distorted There was a defect that caused a defect.

  The present invention was developed in order to eliminate the defects of the prior art. Specifically, as a basic invention, a plurality of idling pieces can be provided on the upper part of a conveying device that conveys a sheet body at high speed. The presser roll is disposed so as to be movable up and down with respect to the thickness direction of the sheet body, and an operation mechanism including a fluid cylinder is locked to the presser roll to forcibly raise and lower the presser roll in a timely manner. In the conveying apparatus configured to convey the sheet body at a high speed while being pressed against the conveying apparatus by the press roll lowered through the operation mechanism, at least the sheet body is directed using an appropriate driving mechanism. High-speed conveyance of a sheet body, wherein the presser roll when being lowered is idled at a peripheral speed in accordance with the conveyance speed of the conveyance device with a weak driving force sufficient to cause the presser roll to idle. Equipment The presser roll operating method (Claim 1) is proposed, and in addition, as a presser roll operating device used for carrying out the invention according to Claim 1, at least the presser roll when lowered toward the sheet body, A press roll actuating device comprising a drive mechanism that idles at a peripheral speed in accordance with the transport speed of the transport device with a weak driving force sufficient to cause the press roll to run idle. ) Is proposed.

  Further, as a more specific form of the drive mechanism, a wind receiving member attached to the presser roll, and at least a weak enough to simply cause the presser roll to idle when the presser roll is lowered toward the sheet body. A driving mechanism comprising a compressed air injection member that injects compressed air toward the wind receiving member so as to idle with a driving force at a peripheral speed corresponding to the conveying speed of the conveying device; When the presser roll is in the vicinity of the highest lift position, it comes into contact with the outer surface of the presser roll and applies frictional force in the direction of rotation of the presser roll, causing the presser roll to idle at a peripheral speed in accordance with the transport speed of the transport device. A drive mechanism having a frictional force imparting member (Claim 4), a magnet or magnetic body disposed on the presser roll, and the presser roll in the vicinity of the highest lift position, Presser foot Each of the drive mechanisms including a rotating magnetic field applying member that causes the presser roll to idle at a peripheral speed in accordance with the conveying speed of the conveying device by applying a magnetic field that is rotationally displaced in the rotation direction to the rolls. suggest.

  According to the operation method of the presser roll according to claim 1 of the present invention, the presser roll when being lowered toward the sheet body in advance with a weak driving force sufficient to idle the presser roll, Since it is idling at a peripheral speed equivalent to the conveying speed of the conveying device, even when a relatively light sheet is conveyed at a relatively high speed, the conveying direction of the sheet is caused by the looseness of the sheet. Even if there is a difference in the contact timing of the presser rolls on the right and left in the direction perpendicular to them, the driven rotation of the presser rolls becomes unbalanced as before, or an unbalanced braking force acts on the sheet body. As a result, it is possible to prevent the occurrence of a problem that distorts the conveying posture of the sheet member.

  Thus, by using the presser roll actuating device according to claim 2 of the present invention, it is possible to carry out the presser roll actuating method according to claim 1 of the present invention. Since a driving configuration is not employed, the configuration can be simplified as a whole, such as unnecessary synchronization of the circumferential speed of the presser roll with respect to the conveyance speed of the conveyance device. Further, as a specific form of the drive mechanism used in the presser roll operating device according to claim 2 of the present invention, the form of the drive mechanism according to claims 3 to 5 of the present invention is a representative form. Can be mentioned.

It is a schematic side surface explanatory drawing of the operating device of the presser roll concerning Claim 2 of the present invention. FIG. 3 is a partially broken plan view of the presser roll operating device illustrated in FIG. 1. FIG. 3 is a perspective explanatory view of a presser roll driving mechanism illustrated in FIGS. 1 and 2. FIG. 4 is an operation explanatory diagram of the presser roll operating device illustrated in FIGS. 1 to 3. FIG. 4 is an operation explanatory diagram of the presser roll operating device illustrated in FIGS. 1 to 3. It is side surface explanatory drawing of a different example of the drive mechanism of a presser roll. It is a perspective explanatory view of a different example of the drive mechanism of the presser roll.

  Hereinafter, the present invention will be described in further detail together with an example illustrated in the drawings. In the illustrated example, a veneer veneer (hereinafter simply referred to as a veneer) is illustrated as an example of a sheet body. In addition, an appropriate control mechanism is required to operate each member / equipment constituting the operating device of the illustrated embodiment, but the function to be performed by the control mechanism is not particularly special. The control mechanism is simple and easy to see because there is no difficulty in the configuration of the control mode, and it is sufficient to simply control each device / member to be turned on and off (or switch). The illustration of the control system (piping and wiring) is omitted.

  1 to 3, reference numeral 1 denotes a roll conveyor having a plurality of feed rolls 1a that are rotated at high speed in the direction of an arrow through a drive source (not shown) such as a motor, which will be described later. The single plate 7 loaded at a high speed in the direction of the arrow in the drawing is continuously conveyed at the same speed (or at a higher speed) in the same direction via the feed mechanism 8 in the previous process.

  2 is a presser roll having a windmill-like wind receiving member 2a attached to the side, and alternately swings between a standby position indicated by a solid line and an operation position indicated by a dotted line as will be described later. It is pivotally attached to one end of the plurality of swing arms 3 so as to be idled, and at the standby position shown by a solid line, a compressed air injection action through a compressed air injection member 5 described later is obtained, The single plate 7 to be conveyed is moved by idling at a peripheral speed corresponding to the conveying speed of the roll conveyor 1 and, when appropriate, by obtaining a swinging action of the swinging arm 3 and descending to an operating position indicated by a dotted line. The pressure is pressed against the roll conveyor 1 to ensure the accuracy of the conveying posture and conveying speed of the veneer 7.

  From the viewpoint of reducing the driven resistance, the presser roll is desirable to be lightweight, including the accessory parts such as the wind receiving member, for example, synthetic resin is most suitable, but aluminum or the like Even if it is made of light metal, there is no practical problem. Further, it is desirable to further reduce the driven resistance by pivoting through a rolling bearing such as a ball bearing.

  Reference numeral 3 denotes a plurality of swing arms pivotably supported by two left and right pairs of inverted L-shaped frames 6 fixed to a machine frame (not shown). The presser roll 2 is pivotally attached to the end so as to be able to rotate freely, and an operating mechanism 4 to be described later is connected to the other end, and in a normal state, at a standby position indicated by a solid line. The operation mechanism 4 is obtained for the forward operation at the appropriate time, and swings to the operation position indicated by the dotted line (forward operation). Further, after the predetermined time has elapsed, the operation mechanism 4 is obtained for the backward operation. Then, it swings (returns) again to the standby position indicated by the solid line, and waits for the next single plate 7 to be carried.

  Reference numeral 4 denotes an operating mechanism including a fluid cylinder (or a crank mechanism / cam mechanism having a similar function) or the like. Under the control of a control mechanism (not shown), each of the swing arms 3 is normally operated. Each time the single plate 7 carried into the standby position indicated by the solid line and transferred via the delivery mechanism 8 described later is transferred to the roll conveyor 1, the swing arm 3 is moved to the operating position indicated by the dotted line. Further, after the single plate 7 passes the position of the presser roll 2, each swing arm 3 is moved back to the standby position indicated by the solid line again.

  Reference numeral 5 denotes a plurality of compressed air injection members fixed to the inverted L-shaped frame 6 via an L-shaped arm 5a. The injection members 5 are located at a standby position indicated by a solid line based on control of a control mechanism (not shown). Compressed air is sprayed onto the wind receiving member 2 a of the presser roll 2 pivotally attached to each of the waiting swinging arms 3, and the presser rolls 2 are idled at a peripheral speed corresponding to the transport speed of the roll conveyor 1. .

  It should be noted that the compressed air may be constantly ejected while the transport device is in operation, but if necessary, each swing arm 3 is moved from the standby position indicated by the solid line to the operating position indicated by the dotted line. In a limited period before starting to move forward, in detail, when each swing arm 3 starts to move forward, each presser roll 2 is brought to a peripheral speed corresponding to the conveying speed of the roll conveyor 1. It is possible to adopt a control mode in which ejection is intermittently limited to a period sufficient for idling.

  Reference numeral 8 denotes a feeding mechanism having a pair of upper and lower pinch rolls 8a and 8b that are rotated at a high speed in the direction of the arrow through a driving source (not shown) such as a motor. It is carried out in the direction at a high speed and transferred onto the roll conveyor 1 that rotates at the same speed (or at a higher speed).

  The presser roll operating device according to the present invention is configured, for example, as described above, and its operating mode will be described in detail with reference to FIGS. As described above, while the single plate 7 is being carried out while being restrained by the delivery mechanism 8, based on the control of a control mechanism (not shown), each swing arm 3 is placed on standby at the standby position shown in FIG. Before each swing arm 3 starts to move to the operating position, the compressed air is injected to the wind receiving member 2a of the presser roll 2 via the compressed air injection member 5, and each presser roll 2 is moved in advance. , Idle at a peripheral speed according to the transport speed of the roll conveyor 1.

  Thereafter, as illustrated in FIG. 5, when the entire veneer 7 is transferred onto the roll conveyor 1, each oscillating arm is quickly moved via the operation mechanism 4 based on the control of a control mechanism (not shown). 3 is moved forward to the operation position shown in FIG. 5, and the single plate 7 is pressed against the roll conveyor 1 by each presser roll 2.

  Then, after the single plate 7 has passed the position of the presser roll 2, the swing arm 3 is again moved to the standby position shown in FIG. To wait for the next single plate 7 to be carried in.

  Although illustration is omitted, if necessary, it is possible to provide the press rolls 2 in a plurality of rows from the upper side to the lower side in the transport direction of the roll conveyor 1. When the presser rolls 2 are provided, in addition to the mode in which all the presser rolls 2 are moved back to the standby position all at once, if necessary, the upper side row through which the veneer passes is moved from the lower side row to the lower side row. There is no problem even if a mode of returning to the standby position is adopted.

  According to the operation mode of the presser roll operating device as described above, the presser roll 2 to be lowered toward the veneer 7 is previously provided with a weak driving force sufficient to cause the presser roll 2 to idle. In the case where the relatively light veneer 7 is conveyed at a relatively high speed, it is caused by the looseness of the veneer 7 and so on. Even if there is a difference in the contact timing of the presser roll 2 in the right and left directions perpendicular to the conveyance direction of the single plate 7, the follower rotation of the presser roll 2 becomes unbalanced as before, or the single plate 7 There is no possibility that an unbalanced braking force will be applied to this, and as a result, it is possible to prevent the occurrence of a problem that distorts the conveying posture of the veneer 7. Further, since the structure in which the presser roll is always driven is not adopted, the overall structure is simple, for example, it is unnecessary to excessively synchronize the peripheral speed of the presser roll with respect to the transport speed of the transport device.

  In the above-described embodiment, the presser roll drive mechanism is a combination of a wind receiving member attached to the presser roll and a compressed air injection member that injects compressed air toward the wind receiving member. Although a drive mechanism is used, a drive mechanism having a mode as described later can be adopted as a presser roll drive mechanism.

  That is, the drive mechanism of the presser roll illustrated in FIG. 6 is preferably a connecting shaft 9a for connecting the drive roll 9 whose outer peripheral portion is covered with an elastic body such as rubber and soft synthetic resin to the left and right of the drive roll 9. And the outer circumference of the presser roll 2 (without the wind receiving member) in which the outer circumferential surface of the drive roll 9 is located at the standby position indicated by the solid line through the support arm 10 fixed to the inverted L-shaped frame 6. It is pivotally supported at a position where it can come into contact with the surface, and the drive roll 9 is moved in the direction indicated by the arrow at a peripheral speed equivalent to the transport speed of the roll conveyor 1 via the drive source 11 such as a motor and the connecting shaft 9a. The press roll 2 which is configured to idle and which is in contact with the outer peripheral surface of the drive roll 9 at the standby position until it starts to move forward to the operation position indicated by the dotted line. According to the transport speed of 1 Since the idle plate is rotated at the peripheral speed, the single plate is caused by the looseness of the single plate 7 when the relatively light single plate 7 is transported at a relatively high speed as in the above-described embodiment. 7, even if there is a difference in the contact timing of the presser roll 2 on the left and right in the direction perpendicular to the conveying direction, the follower rotation of the presser roll 2 becomes unbalanced, or the unbalanced braking force is applied to the single plate 7. There is no possibility that the sheet will act, and the induction of a problem that distorts the conveying posture of the veneer 7 is suppressed.

  The drive source 11 may be driven at all times while the transport device is in operation. However, if necessary, when each swing arm 3 starts to move forward, It is possible to adopt a control mode in which driving is intermittently performed only during a period sufficient to allow idling until the peripheral speed corresponding to the conveying speed of the conveyor 1 is reached.

  Next, the drive mechanism of the presser roll illustrated in FIG. 7 includes an appropriate number of permanent magnets or magnetic bodies 2b attached to the presser roll 2 (which does not have a wind receiving member), and preferably the same number of permanent magnets 12a. In other words, a motor is used to induce and rotate the presser roll 2 at a peripheral speed corresponding to the conveying speed of the roll conveyor 1 by the induction action by the magnetic force of the permanent magnet 12a. The roll-shaped rotating magnetic field applying member 12 that is rotated at an appropriate rotational speed via the drive source 13 such as the same is also used as a support member for the drive source 13 in the vicinity of the side of the presser roll 2 located at the standby position. The actuating mechanism 14, which is disposed so as to be separated from and accessible to the presser roll 2 through the guide member 15, and further comprises a fluid cylinder (or a crank mechanism / cam mechanism having a similar function), etc. Guide member 5 is attached to the one in which you configured.

  The operation mode of the drive mechanism having such a configuration will be described. Before starting to move at least each of the swing arms 3 to the operation position, based on the control of a control mechanism (not shown), the operation mechanism 14 is used. The rotating magnetic field applying member 12 is brought close to the presser roll 2 and the rotating magnetic field applying member 12 is rotated at an appropriate number of revolutions via the drive source 13 so that the presser roll 2 is preliminarily moved to the roll conveyor. When the respective swinging arm 3 is moved forward to the operating position at a peripheral speed corresponding to the transport speed of 1, and then moved forward to the operating position, the operating mechanism 14 is controlled based on the control of a control mechanism (not shown). By separating the rotating magnetic field applying member 12 from the presser roll 2 via the, the induction action due to the magnetic force of the permanent magnet 12a is quickly cut off, and the presser roll 2 that is merely idling is removed. 7, the driven rotation of the presser roll 2 may become unbalanced even if there is a difference in the contact timing of the presser roll 2 on the left and right in the direction orthogonal to the conveyance direction of the veneer 7, or There is no possibility that an unbalanced braking force is applied to the veneer 7, and the inconvenience of distorting the conveying posture of the veneer 7 is suppressed.

  Although illustration is omitted, if necessary, instead of the rotating magnetic field applying member provided with the permanent magnet in the above example, the rotating magnetic field applying member provided with an electromagnet, or electromagnetic induction caused by energization of electricity. There is no problem even if a rotating magnetic field applying member or the like is used, and even if any type of rotating magnetic field applying member is used, the rotating magnetic field applying member may be always operated during operation of the transfer device. However, if necessary, when each swing arm 3 starts to move forward, it is limited to a period sufficient to allow each presser roll 2 to idle until it reaches a peripheral speed corresponding to the conveyance speed of the roll conveyor 1. There is no problem even if a control mode for intermittent operation is adopted. Further, in the case of using an electric rotating magnetic field applying member, since the magnetic field applying action disappears when the electric current is turned off, the configuration / operation for separating the rotating magnetic field applying member from the presser roll becomes unnecessary.

  As described above, the typical mode of the presser roll drive mechanism has been described together with the illustrated example. However, in short, the presser roll at the time of being lowered toward the sheet body is weak enough to cause the presser roll to idle. The driving mechanism can be adopted without any particular limitation as long as it is a driving mechanism that has a function of idling at a peripheral speed in accordance with the conveying speed of the conveying device. The design can be changed.

  Further, in each of the above embodiments, the locking mechanism of the operating mechanism with respect to the presser roll is an indirect locking mode (a general locking mode via a swinging arm). In the case of using a crank mechanism, etc., the presser roll can be directly pivotally attached to one end of the crank bar. Absent.

  As is apparent from the above, according to the present invention, even when a relatively light sheet body is transported at a relatively high speed, the right and left sides in the direction orthogonal to the sheet body transport direction are caused by the unevenness of the sheet body. Even if there is a difference in the contact timing of the presser roll in this case, there is no possibility that the follower rotation of the presser roll will be unbalanced or that an unbalanced braking force will act on the sheet body. Inducing the occurrence of problems that distort the conveying posture is prevented, and the accuracy of the conveying posture and conveying speed of the sheet body can be ensured, which is beneficial. It ’s big.

1: Roll conveyor 2: Presser roll 3: Oscillating arms 4 and 14: Actuating mechanism 5: Compressed air injection member 7: Single plate 8: Feeding mechanism 9: Drive roll 10: Support arms 11 and 13: Drive source 12: Rotating magnetic field applying member

Claims (5)

  A plurality of idler-pressing press rolls are arranged on the upper part of the conveying device that conveys the sheet body at a high speed so as to be movable up and down with respect to the thickness direction of the sheet body. In order to move up and down, an operation mechanism composed of a fluid cylinder or the like is configured to be fast-moved while pressing the sheet body against the conveying device with the presser roll locked to the presser roll and lowered through the operation mechanism. In the transport device, using a suitable drive mechanism, at least the presser roll when being lowered toward the sheet body, with a weak driving force sufficient to cause the presser roll to idle, A method for operating a presser roll in a high-speed conveying apparatus for sheet, wherein the sheet is idled at a peripheral speed corresponding to the conveying speed.   A plurality of idler-pressing press rolls are arranged on the upper part of the conveying device that conveys the sheet body at a high speed so as to be movable up and down with respect to the thickness direction of the sheet body. In order to move up and down, an operation mechanism composed of a fluid cylinder or the like is configured to be fast-moved while pressing the sheet body against the conveying device with the presser roll locked to the presser roll and lowered through the operation mechanism. In the transport device, at least the presser roll when being lowered toward the sheet body is idled at a peripheral speed in accordance with the transport speed of the transport device with a weak driving force sufficient to cause the presser roll to idle. An operating device for a presser roll in a high-speed conveyance device for a sheet body, characterized by comprising a drive mechanism.   With the wind receiving member attached to the presser roll and at least when the presser roll is lowered toward the sheet body, the transport speed of the transport device is adjusted with a weak driving force sufficient to simply idle the presser roll. 3. A presser in a high-speed conveying apparatus for a sheet body according to claim 2, comprising a drive mechanism including a compressed air injection member for injecting compressed air toward the wind receiving member so as to idle at a similar peripheral speed. Roll actuator.   Only when the presser roll is in the highest lift position or in the vicinity of the highest lift position, the presser roll is brought into contact with the outer surface of the presser roll and a frictional force is applied in the rotation direction of the presser roll so that the presser roll is transported at the transport speed 3. A press roll operating device in a high speed conveying apparatus for a sheet body according to claim 2, wherein the driving mechanism is provided with a frictional force applying member that idles at a peripheral speed according to the above.   A magnet or magnetic body disposed on the presser roll and a magnetic field that is positioned in the vicinity of the presser roll and is rotationally displaced in the rotational direction only when the presser roll is at the highest lift position or near the highest lift position. The sheet body high-speed conveying device according to claim 2, wherein the driving mechanism includes a rotating magnetic field applying member that causes the presser roll to idle at a peripheral speed corresponding to the conveying speed of the conveying device. Presser roll actuator.

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