PI type single-roller deviation rectifying device

Abstract

The utility model discloses a PI type single-roller deviation rectifying device which comprises a machine frame. The deviation rectifying roller is movably connected to the rack and used for conveying a plate strip; the deviation rectifying mechanism can perform corresponding deviation rectifying on the plate strip; the first detection mechanism is arranged at the position, close to the deviation rectifying roller, of the rack and can detect the position of the deviation rectifying roller; the second detection mechanism can detect whether the plate strip is in a normal position or not; the deviation rectifying mechanism comprises a first connecting rod, a second connecting rod and a driving oil cylinder; one end of the first connecting rod is hinged with one axial end of the deviation rectifying roller, and the other end is hinged with the rack; one end of the second connecting rod is hinged to the other end, located in the axial direction, of the deviation rectifying roller, the other end of the second connecting rod is hinged to the rack, one end of the driving oil cylinder is hinged to one end, located in the axial direction, of the deviation rectifying roller, and the other end of the driving oil cylinder is hinged to the rack so that the driving oil cylinder can swing left and right in the conveying direction perpendicular to the plate strip. The deviation rectifying roller can be driven to swing left and right in the direction perpendicular to the conveying direction of the plate strip so as to conduct corresponding deviation rectifying on the plate strip.

Description

TECHNICAL FIELD

[0001] The utility model relates to single roller deviation rectification technical field especially, it relates to a PI type single roller deviation rectification device. BACKGROUND

[0002] Due to the plate strip is not ideal or with the rubber roll contact is not good or each roller is not well arranged, produces trace deformation, and the plate strip will produce transverse deviation in the running process, needs to use the equipment to correct its error. CONTENT

[0003] (I) technical problem to be solved

[0004] The utility model wants to solve the technical problem to provide a PI type single roller deviation rectification device, can feedback whether the plate strip is deviated through the setting of second detection mechanism, can then feedback signal to the controller, and then starts drive oil jar, makes it run and drives deviation rectification roller to sway left and right, and then rectifies the position of plate strip, can realize the purpose that the position of plate strip is automatically corrected in the process of conveying plate strip, adjustment is more convenient, and saves manual work.

[0005] (II) technical scheme

[0006] The utility model solves the scheme that the above technical problem adopts a PI type single roller deviation rectification device for rectifying the position of plate strip in the process of conveying plate strip, comprising

[0007] Frame;

[0008] Deviation rectification roller is movably connected in the frame and is used for conveying plate strip;

[0009] Deviation rectification mechanism is located on the frame, and can rectify the plate strip;

[0010] First detection mechanism is located on the frame close to the deviation rectification roller, and can detect the position of deviation rectification roller;

[0011] Second detection mechanism is close to plate strip setting, and can detect whether plate strip is in normal position;

[0012] The deviation rectifying mechanism comprises a first connecting rod, a second connecting rod and a driving oil cylinder; one end of the first connecting rod is hingedly connected to one end of the deviation roller in the axial direction, and the other end is hingedly connected to the rack; one end of the second connecting rod is hingedly connected to the other end of the deviation roller in the axial direction, and the other end is hingedly connected to the rack; one end of the driving oil cylinder is hingedly connected to one end of the deviation roller in the axial direction, and the other end is hingedly connected to the rack, so that the driving oil cylinder swings left and right along the direction perpendicular to the conveying direction of the strip, and drives the deviation roller to swing left and right along the direction perpendicular to the conveying direction of the strip, so as to adjust the deviation roller and correct the strip.

[0013] In some embodiments, the second detection mechanism comprises a centering frame, which detects the deviation of the strip from the normal position and feeds back a signal to the controller, the controller controls the driving oil cylinder to swing left or right to correct the position of the strip until the centering frame detects that the strip is in the normal position and feeds back a signal to the controller, and the controller controls the driving oil cylinder to stop running; and in this process, the first detection mechanism can detect the position of the deviation roller in real time and feed back the detection data to the controller, so as to obtain the change of the position of the deviation roller in the process of correcting the strip, and further obtain the fluctuation frequency of the displacement of the strip.

[0014] By adopting the above scheme, the second detection mechanism can feed back whether the strip deviates, and feed back a signal to the controller, so as to start the driving oil cylinder to drive the deviation roller to swing left and right, and correct the position of the strip, so that the position of the strip can be automatically corrected during conveying, and the adjustment is more convenient and saves labor.

[0015] In some embodiments, the rack comprises a base and a support vertically fixed on one side of the base, two support rods are fixed in the middle of the support, and the first connecting rod and the second connecting rod are hingedly connected to the two support rods respectively.

[0016] In some embodiments, the first detection mechanism comprises a linear stroke sensor fixed on the rack; the linear stroke sensor comprises a detection rod; one end of the detection rod is hingedly connected to the deviation roller; and the linear stroke sensor can detect the displacement data of the center axis of the deviation roller relative to the center axis of the detection rod.

[0017] By adopting the above scheme, the linear stroke sensor can detect the position of the deviation roller in real time and feed back the detection data to the controller during the deviation rectification of the strip, so as to obtain the change of the position of the deviation roller in the process of correcting the strip, and further obtain the fluctuation frequency of the displacement of the strip.

[0018] In some embodiments, the first detection mechanism and the driving oil cylinder are respectively connected to two ends of the deviation rectifying roller in the axial direction, so that the driving oil cylinder can more simply adjust the deviation rectifying roller, thereby rectifying the strip.

[0019] In some embodiments, the first detection mechanism is mounted on the rack through a first fixing seat, the driving oil cylinder is mounted on the rack through a second fixing seat, and the first fixing seat and the second fixing seat are oppositely arranged at two ends of the axial direction of the deviation rectifying roller; one end of the driving oil cylinder is hinged to the second fixing seat, and the other end is hinged to the deviation rectifying roller.

[0020] Specifically, the first fixing seat and the second fixing seat are both fixed to the base through a rod, which is more stable in structure, so that the detection result of the first detection mechanism is more accurate, and the operation of the driving oil cylinder is more stable.

[0021] In some embodiments, the deviation rectifying roller is provided with a first mounting seat and a second mounting seat at two ends thereof in the axial direction; the first connecting rod is hinged to the first mounting seat, and the second connecting rod is hinged to the second mounting seat; and the distance between the hinged portions of the first connecting rod and the rack and the hinged portions of the second connecting rod and the rack is less than the distance between the hinged portions of the first connecting rod and the first mounting seat and the hinged portions of the second connecting rod and the second mounting seat, so that the first connecting rod and the second connecting rod are in a splayed shape when the deviation rectifying roller is in a normal position.

[0022] Specifically, the deviation rectifying roller is rotatably connected between the first mounting seat and the second mounting seat to realize the transportation of the strip.

[0023] In some embodiments, the driving oil cylinder comprises a telescopic rod, which is hinged to the first mounting seat.

[0024] Specifically, during the operation of the driving oil cylinder to rectify the deviation of the strip, the telescopic rod of the driving oil cylinder swings leftward or rightward relative to the central axis of the detection rod to swing the deviation rectifying roller leftward or rightward; and since the deviation rectifying roller is offset, the telescopic rod of the driving oil cylinder is correspondingly extended or retracted to automatically rectify the strip.

[0025] In some embodiments, the first mounting seat and the second mounting seat are provided with support wheels below.

[0026] By using the above scheme, the support wheels are arranged below the first mounting seat and the second mounting seat to support the deviation rectifying roller, so that the transportation of the strip is more stable.

[0027] In some embodiments, an auxiliary roller capable of synchronous movement with the deviation correcting roller is further included, the auxiliary roller is arranged close to the deviation correcting roller, and the auxiliary roller is oppositely arranged above the deviation correcting roller, and the strip is arranged between the auxiliary roller and the deviation correcting roller.

[0028] In some embodiments, the auxiliary roller is connected with auxiliary roller frames at both ends in the axial direction, and the two auxiliary roller frames are fixed on both ends in the axial direction of the deviation correcting roller to realize synchronous movement of the auxiliary roller and the deviation correcting roller.

[0029] Specifically, one of the auxiliary roller frames is integrally formed on the first mounting seat, and the other auxiliary roller frame is integrally formed on the second mounting seat, so that the structure has higher strength, the synchronous operation of the auxiliary roller and the deviation correcting roller is more stable, and the transportation stability of the strip is ensured.

[0030] In some embodiments, the auxiliary roller is rotatably connected with the two auxiliary roller frames at both ends in the axial direction.

[0031] By adopting the above scheme, the auxiliary roller is arranged to make the strip closely contact with the deviation correcting roller, so that the transportation of the strip is more smooth and stable.

[0032] (Three) beneficial effects

[0033] Compared with the prior art, the utility model discloses a PI type single-roller deviation correcting device,

[0034] (1) the utility model discloses a second detection mechanism can feedback whether the strip is deviated, then can feedback signal to the controller, and then starts the drive cylinder, makes it run and drives the deviation correcting roller to sway left and right, and then corrects the position of the strip, can realize the position of the strip in the process of conveying the strip is automatically corrected, and the adjustment is more convenient, and saves manual work;

[0035] (2) in the process that the drive cylinder runs and corrects the deviation of the strip, one end of the drive cylinder is hinged with the second fixed seat, the other end is hinged with the deviation correcting roller, then the drive cylinder will sway left or sway right relative to the center axis of the detection rod, to drive the deviation correcting roller to sway left or sway right, and because the deviation correcting roller is deviated, the center axis of the detection rod will also be deviated, then the telescopic rod of the drive cylinder will make extension or retraction movement accordingly, to realize the automatic correction of the strip;

[0036] (3) the supporting wheel in the utility model is arranged below the first mounting seat and the second mounting seat, can support the deviation correcting roller, and the transportation of the strip is more stable;

[0037] (4) The utility model discloses a set up the auxiliary roller, make the plate strip and the deviation rectifying roller close, then make the transportation of plate strip more smooth and stable. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the drawings needed in the embodiment will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0039] Figure 1 It is a first visual angle structural schematic drawing of a PI type single roller deviation rectifying device of the utility model;

[0040] Figure 2 It is a second visual angle structural schematic drawing of a PI type single roller deviation rectifying device of the utility model;

[0041] Figure 3 It is a third visual angle structural schematic drawing of a PI type single roller deviation rectifying device of the utility model;

[0042] Figure 4 It is a structural schematic drawing of a PI type single roller deviation rectifying device of the utility model (deviation rectifying roller is in normal position);

[0043] Figure 5 It is a structural schematic drawing of a PI type single roller deviation rectifying device of the utility model (deviation rectifying roller relatively shifts to right);

[0044] Figure 6 It is a structural schematic drawing of a PI type single roller deviation rectifying device of the utility model (deviation rectifying roller relatively shifts to left).

[0045] The corresponding component name of each reference numeral in the drawing is: 100, rack;101, first fixed seat;102, second fixed seat;103, base;104, support;105, support rod;200, deviation rectifying roller;201, first mounting seat;202, second mounting seat;300, first connecting rod;400, second connecting rod;500, drive oil cylinder;501, telescopic rod;600, linear stroke sensor;601, detection rod;700, supporting wheel;800, auxiliary roller;900, auxiliary roller frame;100a, centering frame. DETAILED DESCRIPTION

[0046] The specific implementation of the utility model will be described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0047] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through the intermediate medium, can be two element internal communication. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0048] The following describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. The present application can also be implemented or applied by another different specific embodiment, and the details in the specification can be based on different views and applications, and various modifications or changes can be made without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0049] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings provided herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect can be implemented both as any number of software and / or hardware configurations. For example, an aspect can be implemented as a standalone application, or a plurality of such applications can be combined in a multi -threaded application. Also, an aspect can be implemented as a plurality of standalone applications, or one or more of them can be combined with software and / or hardware configurations of another aspect. An aspect can also be implemented as a plurality of components of a design tool or other type of tool.

[0050] It should also be noted that the drawings provided in the following embodiments are only schematic - illustrating the basic concept of the present application, and only show the components related to the present application in the drawings, not drawn according to the number, shape and size of the components in actual implementation, the shape, number and proportion of each component in actual implementation can be a kind of arbitrary change, and the component layout pattern can be more complex.

[0051] In addition, in the following description, specific details are provided to facilitate a thorough understanding of examples. However, one skilled in the art will understand that the application can be practiced without these specific details.

[0052] The technical solutions provided by the embodiments of the present application are described below in combination with the drawings.

[0053] As Figures 1-6 shown, the utility model provides a PI type single roll deviation rectifying device for rectifying the position of the plate belt in the process of conveying the plate belt, including frame 100, deviation rectifying roll 200, deviation rectifying mechanism, first detection mechanism, second detection mechanism 100a, wherein the deviation rectifying roll 200 is movably connected on the frame 100 and is used for conveying the plate belt, the deviation rectifying mechanism is arranged on the frame 100 and can rectify the plate belt, the first detection mechanism is arranged on the frame 100 close to the deviation rectifying roll 200 and can detect the position of the deviation rectifying roll 200, the second detection mechanism 100a is arranged close to the plate belt and can detect whether the plate belt is in the normal position, the deviation rectifying mechanism includes first connecting rod 300, second connecting rod 400 and drive cylinder 500, one end of the first connecting rod 300 is hinged with one end of the deviation rectifying roll 200 in the axial direction, and the other end is hinged with the frame 100, one end of the second connecting rod 400 is hinged with the other end of the deviation rectifying roll 200 in the axial direction, and the other end is hinged with the frame 100, one end of the drive cylinder 500 is hinged with one end of the deviation rectifying roll 200 in the axial direction, and the other end is hinged with the frame 100, so that the drive cylinder 500 swings left and right along the direction perpendicular to the conveying direction of the plate belt, and can drive the deviation rectifying roll 200 to swing left and right along the direction perpendicular to the conveying direction of the plate belt, to rectify the plate belt. In some embodiments, the second detection mechanism includes a centering frame 100a, when the plate belt deviates from the normal position, the centering frame 100a feeds back a signal to the controller, the controller controls the drive cylinder 500 to operate, so that the drive cylinder 500 swings left or right, to correct the position of the plate belt, when the centering frame 100a detects that the plate belt is in the normal position, it feeds back a signal to the controller, and the controller controls the drive cylinder 500 to stop operating, and in the process, the first detection mechanism can detect the position of the deviation rectifying roll 200 in real time and feed back the detection data to the controller, so as to obtain the position change of the deviation rectifying roll 200 in the process of rectifying the plate belt, and further obtain the fluctuation frequency of the displacement of the plate belt. By the above scheme, through the setting of the second detection mechanism, whether the plate belt deviates can be fed back, and a signal can be fed back to the controller, and then the drive cylinder 500 is started to drive the deviation rectifying roll 200 to swing left and right, and the position of the plate belt is corrected, so that the position of the plate belt can be automatically corrected in the process of conveying the plate belt, and the adjustment is more convenient, and the labor is saved.

[0054] In some embodiments, the rack 100 comprises a base 103, and a support 104 vertically fixed on one side of the base 103, two support rods 105 are fixed in the middle of the support 104, and the first connecting rod 300 and the second connecting rod 400 are respectively hinged on the two support rods 105. In some embodiments, the first detection mechanism comprises a linear displacement sensor 600 fixed on the rack 100; the linear displacement sensor 600 comprises a detection rod 601; one end of the detection rod 601 is hinged with the deviation correcting roller 200; the linear displacement sensor 600 can detect the displacement data of the center axis of the deviation correcting roller 200 relative to the center axis of the detection rod 601. With the above scheme, the linear displacement sensor 600 can detect the position of the deviation correcting roller 200 in real time during the deviation correction of the strip, and feed back the detection data to the controller, so as to obtain the position change of the deviation correcting roller 200 during the correction of the strip, and further obtain the fluctuation frequency of the displacement of the strip.

[0055] In some embodiments, the first detection mechanism and the driving oil cylinder 500 are respectively connected to the two ends of the deviation correcting roller 200 in the axial direction, so that the driving oil cylinder 500 can more simply adjust the deviation correcting roller 200. In some embodiments, the first detection mechanism is installed on the rack 100 through a first fixed seat 101, the driving oil cylinder 500 is installed on the rack 100 through a second fixed seat 102, and the first fixed seat 101 and the second fixed seat 102 are oppositely arranged at the two ends of the deviation correcting roller 200 in the axial direction; one end of the driving oil cylinder 500 is hinged to the second fixed seat 102, and the other end is hinged to the deviation correcting roller 200. Specifically, the first fixed seat 101 and the second fixed seat 102 are both fixed on the base 103 through a rod, the structure is more stable, the detection result of the first detection mechanism is more accurate, the operation of the driving oil cylinder 500 is more stable, and the deviation of the plate strip is more convenient to correct, and the fluctuation frequency of the deviation displacement of the plate strip is more accurately monitored. In some embodiments, the deviation correcting roller 200 is provided with a first mounting seat 201 and a second mounting seat 202 at the two ends thereof in the axial direction; the first connecting rod 300 is hinged to the first mounting seat 201, and the second connecting rod 400 is hinged to the second mounting seat 202; and the distance between the hinged portions of the first connecting rod 300 and the rack 100 and the hinged portions of the second connecting rod 400 and the rack 100 is less than the distance between the hinged portions of the first connecting rod 300 and the first mounting seat 201 and the hinged portions of the second connecting rod 400 and the second mounting seat 202, so that when the deviation correcting roller 200 is in a normal position, the first connecting rod 300 and the second connecting rod 400 are in a figure-eight shape. Specifically, the deviation correcting roller 200 is rotationally connected between the first mounting seat 201 and the second mounting seat 202 to realize the transportation of the plate strip. In some embodiments, the driving oil cylinder 500 includes a telescopic rod 501, and the telescopic rod 501 is hinged to the first mounting seat 201. Specifically, during the operation of the driving oil cylinder 500 for correcting the deviation of the plate strip, since one end of the driving oil cylinder 500 is hinged to the second fixed seat 102 and the other end is hinged to the deviation correcting roller 200, the driving oil cylinder 500 will swing left or right relative to the central axis of the detection rod 601 to drive the deviation correcting roller 200 to swing left or right; and since the deviation correcting roller 200 deviates after the deviation, the central axis of the detection rod 601 also deviates, so that the telescopic rod 501 of the driving oil cylinder 500 will make a corresponding extension or retraction movement to drive the deviation correcting roller 200 to swing left and right, thereby realizing the automatic correction of the plate strip. In some embodiments, the first mounting seat 201 and the second mounting seat 202 are provided with a supporting wheel 700 below.By the above scheme, the supporting wheel 700 is arranged below the first mounting seat 201 and the second mounting seat 202, and can support the deviation rectifying roller 200, so that the plate strip is transported more stably.

[0056] In some embodiments, an auxiliary roller 800 capable of synchronous movement with the deviation rectifying roller 200 is further included, the auxiliary roller 800 is arranged close to the deviation rectifying roller 200, and the auxiliary roller 800 is arranged above the deviation rectifying roller 200, and the plate strip is arranged between the auxiliary roller 800 and the deviation rectifying roller 200. In some embodiments, the auxiliary roller 800 is connected with an auxiliary roller frame 900 at both ends in the axial direction of the auxiliary roller 800, and the two auxiliary roller frames 900 are fixed on both ends in the axial direction of the deviation rectifying roller 200, so as to realize the synchronous movement of the auxiliary roller 800 and the deviation rectifying roller 200. Specifically, one of the auxiliary roller frames 900 is integrally formed on the first mounting seat 201, and the other auxiliary roller frame 900 is integrally formed on the second mounting seat 202, so that the structure has higher strength, the synchronous movement of the auxiliary roller 800 and the deviation rectifying roller 200 is more stable, and the stability of the plate strip transportation is ensured. In some embodiments, the auxiliary roller 800 is rotatably connected with the two auxiliary roller frames 900 at both ends in the axial direction of the auxiliary roller 800. By the above scheme, the auxiliary roller 800 is arranged close to the deviation rectifying roller 200, so that the plate strip is transported more smoothly and stably.

[0057] In the specification, the same or similar parts among various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0058] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A PI type single roll deviation correcting device for correcting a position of a strip in a process of conveying the strip, characterized by: The utility model relates to a kind of plate strip conveying device, including Frame (100); Deviation correction roller (200), it is movably connected in the frame (100), for conveying plate strip; Deviation correction mechanism, it is located on the frame (100), and deviation correction roller (200) can be correspondingly corrected to plate strip; First detection mechanism, it is located on the frame (100) close to deviation correction roller (200), and the position of deviation correction roller (200) can be detected; Second detection mechanism, it is close to plate strip and can detect whether plate strip is in normal position; Wherein, the deviation correction mechanism includes first connecting rod (300), second connecting rod (400) and drive cylinder (500);The one end of first connecting rod (300) is hinged with the one end of deviation correction roller (200) in axial direction, and the other end is hinged with the frame (100);The one end of second connecting rod (400) is hinged with the other end of deviation correction roller (200) in axial direction, and the other end is hinged with the frame (100), and one end of drive cylinder (500) is hinged with one end of deviation correction roller (200) in axial direction, and the other end is hinged with the frame (100), so that drive cylinder (500) swings left and right along the direction perpendicular to the conveying direction of plate strip, can drive deviation correction roller (200) swing left and right along the direction perpendicular to the conveying direction of plate strip, to be corrected to plate strip correspondingly.

2. The PI type single roll deviation correcting device according to claim 1, characterized in that: The first detection mechanism includes linear travel sensor (600), and linear travel sensor (600) is fixed on the frame (100);Linear travel sensor (600) includes detection rod (601);Wherein, one end of detection rod (601) is hinged with deviation correction roller (200);Linear travel sensor (600) can detect the displacement data of the central axis of deviation correction roller (200) relative to the central axis of detection rod (601).

3. The PI type single roll deviation correcting device according to claim 1, characterized in that: The first detection mechanism and drive cylinder (500) are connected on the two ends of deviation correction roller (200) in axial direction respectively.

4. The PI type single roll deviation correcting device according to claim 3, characterized in that: The first detection mechanism is installed on the frame (100) by first fixed seat (101), drive cylinder (500) is installed on the frame (100) by second fixed seat (102), and the first fixed seat (101) and the second fixed seat (102) are oppositely arranged on the two ends of the axial direction of deviation correction roller (200);One end of drive cylinder (500) is hinged with the second fixed seat (102), and the other end is hinged with deviation correction roller (200).

5. The PI type single roll deviation correcting device according to claim 1, characterized in that: The first mounting seat (201) and the second mounting seat (202) are provided with support wheels (700) below.

6. The PI type single roll deviation correcting device according to claim 5, characterized in that: The auxiliary roller (800) is located at the two ends in the axial direction and is connected with the auxiliary roller frame (900) respectively.

7. The PI type single roll deviation correcting device according to claim 5, characterized in that: The auxiliary roller (800) is located at the two ends in the axial direction and is connected with the auxiliary roller frame (900) respectively.

8. The PI type single roll deviation correcting device according to claim 1, characterized in that: The auxiliary roller (800) is located at the two ends in the axial direction and is connected with the auxiliary roller frame (900) respectively.

9. The PI type single roll deviation correcting device according to claim 8, characterized in that: ​ 10. The PI type single roll deviation correcting device according to claim 9, characterized in that: ​

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