JP2002283290A - Blade replacing method and device of circular blade shearing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade replacing method and a device of a circular blade shearing machine capable of preventing a shelf-lock phenomenon, and requiring no highly accurate device. SOLUTION: This blade replacing method of the circular blade shearing machine replaces a circular blade and/or a spacer installed on an arbor of the circular blade shearing machine. The blade replacing method and the device of the circular blade shearing machine install or remove the circular blade and/or the spacer on and from the arbor in a state of abutting to a guide sleeve having the almost same inner diameter as the circular blade and/or the spacer preinstalled on the arbor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for changing a blade of a round blade shearing machine. More specifically, the present invention relates to automatic blade replacement in which a round blade of a round blade shearing machine, such as a slitter, and a spacer for determining the interval between the round blades (hereinafter, these two are collectively called a round blade) are inserted into an arbor and extracted. In particular, the present invention relates to a method for preventing a self-lock phenomenon occurring between an inner diameter surface of a round blade or the like and an outer peripheral surface of an arbor and facilitating insertion and extraction of the round blade or the like into the arbor by a robot.

[0002]

2. Description of the Related Art Conventionally, blade changing work of a round blade shearing machine such as a slitter has been performed manually by an operator. The clearance between the arbor of the slitter and the round blade or the like is very small, and self-locking is likely to occur between the arbor and the inner diameter surface when the round blade or the like is mounted or extracted. Therefore, this operation requires skill. In addition, the round blades and the like are heavy and heavy muscle work.

Therefore, various automatic blade changing methods using a robot or the like have been conventionally proposed.

[0004] For example, an incorporation device such as a cutter in a slitter facility described in JP-A-57-27614 is intended for mechanization of blade replacement. A transport device such as a round blade and a built-in device are arranged between a storage rack such as a round blade and a slitter. Insertion and extraction of the round blade or the like into or from the arbor is performed by placing the round blade or the like on the built-in device and moving it parallel to the arbor axis by a machine or human power. However, when the round blade or the like is inserted into the arbor in an inclined state, there is a problem that the round blade is caught in the middle of the arbor, that is, a so-called self-lock phenomenon occurs.

A slitter automatic blade changing device described in Japanese Patent Application Laid-Open No. 62-63098 is intended for automatic blade changing. A round blade transporter is arranged between a storage device such as a round blade and a slitter. The round blade transporter is equipped with an automatic attachment / detachment device at the tip, and transfers round blades and the like from the storage device and the arbor and transports between the storage device and the arbor. However, this device also has a problem that a self-lock occurs when the round blade or the like moves on the arbor.

The automatic blade assembly device of the slitter described in Japanese Patent Application Laid-Open No. 2-139113 is also aimed at automatic blade replacement. A device such as a pick-up arm or a conveyor for handling and transport is arranged between a storage box such as a round blade and a slitter. The round blade or the like is first inserted into the pickup arm, and after connecting this arm to the arbor of the slitter, a pusher that moves in parallel with the arbor axis collectively moves the round blade and the like on the arm onto the arbor. However, this device also has a problem that a self-lock occurs when the round blade or the like moves on the arbor.

Further, the automatic slitter round blade changing device described in "Development of automatic slitter round blade changing device in September, 1990" of the Iron and Steel Institute of Japan is intended for automatic blade change, and is used for positioning. 30 times higher accuracy than general-purpose robots with an accuracy of ± 10μm. A hand that grips a round blade etc. is equipped with a force sensor to detect insertion resistance, and by finely moving the hand in the direction to reduce the resistance. Avoiding the self-lock phenomenon. However, a special and high-precision robot and hand are required, so that there is a problem that the apparatus becomes very expensive. In addition, there is no device configuration for handling and transporting in a storage shelf when replacing a round blade or the like.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a method and an apparatus for replacing a blade of a round blade shearing machine which can prevent a self-locking phenomenon and do not require a high-precision apparatus. The purpose is to provide.

[0009]

According to a first aspect of the present invention, there is provided a method for changing a blade of a round blade shearing machine for replacing a round blade mounted on an arbor of the round blade shearing machine. Wherein the round blade or the like is attached to or detached from the arbor in a state in which the circular blade or the like is brought into contact with a guide sleeve which is slidably mounted on the arbor in advance and has the same inner diameter as the round blade or the like. Things.

According to a second aspect of the present invention, there is provided a blade changing device for a round blade shearing machine for replacing a round blade mounted on an arbor of the round blade shearing machine. And a guide sleeve which is previously slidably mounted on the arbor and has a substantially same inner diameter as a round blade or the like.

According to a third aspect of the present invention, there is provided a method for replacing a blade of a round blade shearing machine for replacing a round blade or the like mounted on an arbor of the round blade shearing machine. )
Hold the round blade etc. from the inner side by the robot hand,
(B) inserting the hand of the robot into the concave portion of the transfer section, and (c) placing or picking up the round blade and / or the spacer at the shaft end by the hand of the robot via the transfer section, thereby removing the round blade and / or the spacer. And / or attaching or detaching the spacer to or from the arbor.

According to a fourth aspect of the present invention, there is provided a blade changing apparatus for a round blade shearing machine for replacing a round blade mounted on an arbor of the round blade shearing machine. And a delivery unit.

According to a fifth aspect of the present invention, there is provided a blade changing device for a round blade shearing machine for replacing a round blade or the like mounted on an arbor of the round blade shearing machine. And (b) a hand of a robot for holding the round blade or the like from the inner surface side, and (b) a delivery section having a recessed portion into which a tip of the hand of the robot can be inserted. It is.

According to a sixth aspect of the present invention, there is provided a blade changing method for a round blade shearing machine for replacing a round blade mounted on an arbor of the round blade shearing machine.
In the case where a guide sleeve having substantially the same inner diameter as the round blade and / or the spacer is connected to an arbor slidably mounted and another shaft, the shape of the butted portion of both shafts is regulated by the guide sleeve. It is characterized in that the round blade and / or the spacer can be moved between two axes by making the size and shape not affect the posture of the round blade and / or the spacer.

According to a seventh aspect of the present invention, there is provided a blade changing device for a round blade shearing machine for replacing a round blade mounted on an arbor of the round blade shearing machine. When a guide sleeve having substantially the same inner diameter as the round blade and / or the spacer is connected to an arbor slidably mounted and another shaft, the shape of the butted portion of both shafts is changed to the guide sleeve. It is characterized in that the round blade and / or the spacer can be moved between two axes by making the size and shape not to affect the posture of the restricted round blade and / or the spacer.

The blade changing method for a round blade shearing machine according to claim 8 is a method for replacing a round blade shearing machine for replacing a round blade mounted on an arbor of the round blade shearing machine, wherein (a) )
The round blade or the like is brought into contact with a reference surface on which a normal extends in the same direction as the axial direction of the arbor of the guide device installed on the round blade shearing machine, and (b) the guide device is moved in the axial direction of the arbor. Along with this, a round blade or the like is attached to or detached from the arbor.

A blade changing device for a round blade shearing machine according to a ninth aspect is a blade changing device for a round blade shearing machine for replacing a round blade or the like mounted on an arbor of the round blade shearing machine. And a guide device provided on the round blade shearing machine and having a reference surface extending in the same direction as the axial direction of the arbor.

According to the present invention, a delivery section such as a round blade is provided at the open end of the arbor or the like, and a "guide sleeve" for holding the posture while the round blade or the like moves on the arbor is provided. Partly attached to the arbor in advance.

In order to enable delivery to and from the robot, the delivery section has an outer diameter several millimeters smaller than that of the arbor, and if necessary, has a structure to avoid interference with the robot hand. In order to enable the movement of the round blades and the spacers between the transfer section and the arbor, the upper ends are connected at the same or at a gentle slope. In the case of an existing slitter, a jig (guide cap) having this structure is attached to the open end of the arbor only when changing the blade.

In the present invention, the transfer section is not limited to the transfer section provided at the tip of the arbor. When the blade is not directly set on the arbor by the robot but is set on the temporary placing shaft, the transfer section is not provided. , Provided not at the arbor but at the tip of the temporary placing shaft (the transfer section 43 in FIG. 8).
reference).

The external shape of the guide sleeve is almost the same as that of a round blade or a spacer, but the axial dimension is set to a large size that does not cause self-locking. The clearance between the guide sleeve and the arbor is a small value that can maintain the required precision as a reference plane. I do. The end face of such a guide sleeve functions as a reference plane perpendicular to the axis.

When inserting a round blade or the like, the guide sleeve is first moved to the open end of the arbor, and the round blade is brought into close contact with the end surface of the guide sleeve with a pusher outside the arbor, and is moved on the arbor. Let it. Since the round blade is kept perpendicular to the arbor by the guide sleeve, it moves on the arbor without self-locking.

The driving force for moving the round blade is applied from a linear motion device which operates in parallel with the arbor installed near the arbor via a pusher and a guide sleeve. If this driving force is increased to a size that allows press-fitting, the fitting between the round blade and the arbor can be stopped or tightly fitted.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a round blade shearing machine according to the present invention; 1 is an explanatory view showing a self-locking phenomenon that occurs when a round blade is inserted into an arbor of a round blade shearing machine, FIG. 2 is an explanatory view showing a state where another shaft is connected to the tip of the arbor, and FIG. FIG. 4 is a plan view showing one embodiment of a method and an apparatus for changing the blade of the round blade shearing machine of the invention, that is, a configuration in which a guide sleeve is provided on an existing slitter, FIG. 4 is a front view of the slitter of FIG. 3, and FIG. FIG. 6 is an explanatory view of a guide cap which is a transfer part that can be inserted into the robot hand of FIG. 5, and FIG. 7 is another example of a blade changing method and apparatus of a round blade shearing machine of the present invention. FIG. 8 is a front view showing a configuration of a newly provided slitter having a temporary placing shaft according to an embodiment, FIG. 8 is a plan view of the newly provided slitter of FIG. 7, and FIG.
FIG. 10 is a plan view showing a blade changing device for a side trimmer which is still another embodiment of the blade changing method and device of the round blade shearing machine of the present invention, and FIG. 10 is a front view and a view of the blade changing device of FIG. 11 is a front view of the side trimmer of FIG.

First, a dynamic analysis of the self-lock phenomenon, which is a problem to be solved by the present invention, will be described.

FIG. 1 shows the force when the round blade or the like moves on the arbor in an inclined state. The basic equations are shown in equations (1) to (3). Actual clearance zero angle γ ≒ G / T (1) Balance of axial force F = R + 2μP (2) Rotational moment balance FD = PT + μPD (3) γ: Boundary inclination angle R: Movement reaction force (adjacent round blade, etc.) Μ: Coefficient of friction between the inner diameter surface of the round blade and the arbor cylindrical surface P: Self-locking reaction force d: Outer diameter of the arbor D: Outer diameter of the round blade (maximum point of application of rotational moment) H: Distance between F and R action points (H = D for simplicity) G: Clearance F: Axial moving thrust T: Axial dimension (thickness) of round blade etc.

Equation (1) shows the angle of the boundary where the self-lock phenomenon can occur. When the inclination angle γ exceeds this value and the inclination increases with an increase in the thrust F, self-locking occurs, and the round blade 8 or the like 8 cannot move on the arbor 3. If the inclination angle γ is smaller than this value, no self-lock occurs. Even when it is large, that is, when the point of action of the self-locking reaction force P is elastically deformed, self-locking does not occur if the inclination angle γ does not change with an increase in the thrust F. If the thrust F is increased, it is possible to move on the arbor.

Equations (2) and (3) show the balance of forces when a round blade or the like has a tilt of an angle γ. In order to make it easier to understand the physical meaning of the expression than the accuracy of the numerical value indicated by the expression, the expression was made ignoring the effect of the weight of the round blade or the like. Further, since the point of action of the thrust F and the movement reaction force R may change depending on the situation, it is assumed that the worst case is assumed and the point acting on the outermost diameter of a round blade or the like (H = D).

In order to clarify the meanings of the equations (1) to (3), first, the self-locking reaction force P is eliminated.
Next, when this equation is expressed using the vertical / horizontal dimension ratio a (= T / D) of a round blade or the like and the thrust transmission ratio g (= R / F), the following equations (4) and (5) are obtained. Can be (4), (5)
The expressions are exactly the same, although the expressions are different. g = (a−μ) / (a + μ) (4) a = μ (1 + g) / (1-g) (5)

If g in the formula (4) is positive, the round blade or the like is inclined so as to cause self-locking,
That is, although the self-locking reaction force P is present and the friction force 2 μP against the thrust F is generated, the self-locking is not performed, and the round blade or the like moves on the arbor.

This equation is a simple equation where H = D. It is possible to apply the thrust F to a point intended in the design, for example, to the axis. In this case, the expression indicating the self-lock limit is slightly different from the expressions (4) and (5).

Next, the guide sleeve used in the blade changing method of the present invention will be described.

The present invention relates to formulas (1) and (4),
The effect of the thrust F on the inclination angle of the round blade, etc. by mounting the guide sleeve designed and manufactured not to self-lock based on (5) as a part of the device to the arbor, To prevent self-locking of a round blade or the like, thereby enabling movement on the arbor. In the case where all of the round blades and the like are loose fit, this movement is so-called slip, and the reaction force to the movement indicated by the round blades and the like is a value obtained by multiplying the gravity of the round blades and the like by the friction coefficient. On the other hand, when an interference fit exists in a round blade or the like, the movement of the round blade is press-fitting, and a very large thrust F is required. But,
Since the guide sleeve regulates the inclination angle and the self-locking phenomenon does not occur, axial movement is possible.

The design conditions of the guide sleeve are summarized below. However, known conditions are omitted. 1) Given the dimension ratio a and the required thrust transmission ratio g, the equation (5)
(However, Equation (5) is a simple equation giving priority to understanding. A more strict equation may be obtained and the value may be set to the value or more.) 2) The boundary inclination angle should be equal to or smaller than the minimum value of the boundary inclination angle of a round blade or the like (allowable inclination angle in the case of press fitting).

The mounting of the guide sleeve on the arbor has a special meaning. One end of the arbor is supported by a roller bearing, but the arbor slightly hangs down due to its own weight and elastic deformation of the bearing and the like. The hanging amount changes due to a change in weight due to insertion of a round blade or the like. If the reference plane holding the posture of the round blade or the like exists outside the arbor, the drooping of the arbor changes the posture of the round blade or the like and increases the inclination angle.

When the amount of sag can be tolerated, for example, when the sag is small or the boundary inclination angle of the round blade or the like is large, the reference surface for regulating the posture of the round blade or the like can be placed outside the arbor. Good. In this case, the temporary guide sleeve may be inserted into the arbor, and the reference surface may be brought into close contact with the arbor to position the reference surface.

Next, the movement of the shaft connecting portion will be described.

At the open end of the arbor of the slitter body, there are a portion for mounting a bearing and a screw for fastening a built-in round blade or the like to a shaft. . Therefore, it is necessary to connect an axis that can be transferred to and from the robot to the arbor of the slitter body. However, the connecting portion has a problem that hinders movement of the round blade or the like. First, the two axes should be parallel, but in practice some angles cannot be avoided.
Second, the upper ends of the two axes should be at the same height, but in practice some steps cannot be avoided. These are shown in FIG.

The solutions and conditions for these two problems are described below. However, known method conditions are omitted. 1) At the tip of the arbor, a taper with an inclination angle at which a round blade or the like can move with axial thrust is provided. 2) The abutting portion of the shaft connecting portion is dimensioned so as not to affect the posture of the round blade or the like regulated by the guide sleeve and to prevent movement. This condition is expressed by the following equations (6) to
This is shown in (9). The symbols in FIG. 2 are as follows. d: Arbor diameter of the slitter body θ: Taper inclination angle at the tip of the arbor X: Taper length Y: Taper height U: Upper dimension of the delivery shaft L: Lower dimension of the delivery shaft e: Butt error of both shafts (expected maximum) Value) β: Square angle (expected maximum value) B _MAX : Maximum width of round blade etc. B _MIN : Minimum width of round blade etc. γ: Boundary inclination angle of guide sleeve (see Fig. 1) C _i : Moving condition check value.

From this figure, four movable conditional expressions are obtained geometrically. Condition for not colliding with the shaft end Y> C ₁ = d / 2−U + e (6) Condition for not falling into the depression B _MIN > C ₂ = X− (d / 2−U + e) / tan θ (7) Attitude 0 <C ₃ = d / 2−U−e− (B _MAX −X) tan (β + γ) (8) Condition not to Change Posture 0 <C ₄ = d / 2−L− e- ( _BMAX- X) tan (β + γ) (9)

Next, a description will be given of an embodiment in which the method and the apparatus for changing the blade of the round blade shearing machine according to claims 1 to 5 of the present invention are applied to an existing slitter.

Embodiment 1 FIGS. 3 and 4 show an example in which the present invention is applied to a slitter in which manual blade replacement has been performed. The slitter body 1 is drawn off-line for blade replacement, and shows a state in which the bearing 2 on the opposite side to the drive is removed from the arbor 3. A guide sleeve 4 having substantially the same inner diameter as the round blade 8 is mounted on the drive side of the arbor, and a taper 1a for connecting to the bearing 2 and a round blade are tightened in the axial direction on the tip of the arbor opposite the drive side. Screw 1
b has been processed. The guide cap 31 which is a connecting shaft having a transfer part with the robot 6 is shown in FIG.
Is not shown in FIG. Although illustration of the pusher and the guide sleeve driving device is omitted, they are the same as those shown in FIGS. A storage shelf 5 having round blades 8 and the like and a 6-axis general-purpose robot 6 were arranged around the slitter. A hand 7 is attached to the tip of the arm of the robot. The round blade 8 and the like 8 are shown inserted into the arbor and a part of the one placed on the storage shelf.

FIG. 5 shows a part of a cross section of the robot hand and the storage shelf 5. As a method of gripping the round blade 8 or the like, an outer circumference grip or a side grip may be considered, but in this example, an inner diameter grip is adopted from the viewpoint of compatibility with other equipment and grip strength. Attach the base plate 21 of the hand 7 to the arm 6 of the robot,
An upper claw 22 was attached to this plate, and a lower claw 23 was attached so as to be vertically movable by an air cylinder 24.
These three pawls enter the inner diameter of the round blade 8 or the like, and the lower pawl 23 is driven up and down by the air cylinder 24 to grip the inner diameter of the round blade or the like.

FIG. 6 shows a connecting shaft having a transfer part with the robot. Here, the connecting shaft is called a guide cap 31 because of its shape. The guide cap 31 is formed with a transfer portion A, a taper B, and an arbor screw portion C. Only when the guide cap 31 is used for blade replacement, FIG.
Cover the arbor tips 1a and 1b. Grooves 31a are provided at three locations in the delivery portion as recesses into which the claws 22, 23 of the hand 7 enter.

The arbor of the existing slitter has a diameter of 180
mm, the upper tolerance was −15 μm, and the lower tolerance was −20 μm. Maximum thickness B _MAX of round blades etc. is 100mm, minimum thickness B
_{The MIN} was 10 mm. Holes such as round blades have an upper tolerance of +1
7 μm, lower tolerance +5 μm. Shaft tolerance is equivalent to fit class 2 and hole is class 4 and is a severe process applied to gauges. Although it is an irregular fit, the minimum clearance is 20 μm, and the type of fit is closest to g (minimum clearance 14 μm) applied to the precision moving part.

As a reference example, an explanation of the application of these types of fits is shown in Table 1 diverted from "Kiyoshi Onishi, published by New Technology Development Center Co., Ltd., manual for machine precision design".

[0047]

[Table 1]

From Table 1, it can be seen that the fit can be made tighter if the insertion of the round blade is possible with mechanical force. In order to improve the shear quality of the slitter when purchasing new blades in the future, we can shift to a tighter fit so that
The tolerance of the guide sleeve was +8 to 20 μm. As shown in FIG. 1 and equations (1) to (5), the thickness of the guide sleeve was assumed to have a friction coefficient of 0.3, and the dimensional ratio a was about 0.5. Further, the guide sleeve driving device has a structure in which the thrust F acts on the axis. That is, the equation (5) is obtained assuming that the thrust acts on the outermost part of the guide sleeve. By applying this to the shaft center, the rotational moment is reduced by about half, and the friction coefficient is 0.3, The selection of the dimensional ratio 0.5 has a margin of about twice.

The diameter of the transfer part with the robot was 6 mm smaller than the arbor diameter d of the slitter body. The diameter of the portion in contact with the arbor was reduced by 0.4 mm. At this part of the arbor tip, there is a screw for tightening a round blade or the like, and 0.4 mm was selected from the restriction of the outer diameter. The taper at the tip of the arbor was X = 3 mm, Y = 0.45 mm, and θ = 8.5 ° C. (gradient 15%).

When a round blade is installed in the existing slitter shown in FIGS. 3 and 4, first, a guide cap 31 (see FIG. 6) is attached to the tip of the arbor 3, and then,
The hand 7 of the robot 6 holds the round blade 8 or the like 8 on the shelf from the inside (see FIG. 5), and then inserts the hand 7 into the guide cap 31 at the tip of the arbor 3. Then, the claw 23 under the hand is raised to deposit a round blade or the like on the guide cap, and the hand is released outside the guide cap.
Finally, the guide sleeve is driven while the round blade 8 or the like 8 is in contact with the guide sleeve 4 moved to the tip of the arbor 3 by a pusher (not shown), and is moved on the arbor 3. The arbor 3 can be mounted smoothly without causing a self-lock phenomenon. After attaching the guide cap 31, the round blade 8 or the like 8 may be attached to the arbor 3 using means other than the hand of the robot, or may be attached manually. Similarly, when the round blade 8 is moved in the opposite direction, the round blade or the like is brought into contact with the guide sleeve, so that the self-lock phenomenon does not occur. Therefore, the round blade can be removed smoothly. .
Therefore, the replacement work of the round blade or the like can be performed smoothly.

Next, a description will be given of an embodiment in which the method and apparatus for changing the blade of the round blade shearing machine according to claims 6 to 8 of the present invention are applied to a newly-installed slitter.

Embodiment 2 FIGS. 7 and 8 show an embodiment for a new slitter. The slitter body 1 was fixed at the center of the line. Anti-drive side bearing 2
Shifts sideways when changing blades. A guide sleeve 4 is mounted on the arbor 3, and a driving device 4 for the guide sleeve 4 is provided.
2 was set on the slitter body 1. The delivery from the robot 6 (see FIG. 3) is performed to the temporary placing shaft 41.
There are a total of four temporary setting shafts, one for the upper new blade, one for the lower new blade, one for the upper and lower blades, and one for the lower old blade, but only one is shown. A delivery unit 43 having a groove into which three claws of the robot hand enter is provided at the tip of the temporary placing shaft 41. The four temporary placing shafts 41 are provided with a pusher 7 for moving forward to connect with the arbor 3, retreating to the robot transfer position, and moving a round blade or the like between the arbor 3 and the like.

In order to enable the movement of the biaxial connecting part, the connecting part was designed according to the equations (6) to (9). For example, the cross-sectional shape of the tip of the temporary placing shaft is such that the upper dimension (U) is smaller by 0.2 mm than the radius (d / 2) of the arbor of the slitter body so as not to be affected by errors (e, β) and the like. (L) was set to about half of the arbor radius. Also, as in the first embodiment, X = 3 mm and Y = 0.
A small taper of 45 mm was provided.

When replacing the round blade or the like of the newly provided slitter shown in FIGS. 7 and 8, first, the next round blade or the like is set on the temporary placing shaft by the robot. New round blades and the like are set on two of the four temporarily placed shafts, and the other two are left empty. Next, the empty temporary placing shaft 41 and the arbor 3 are connected, the guide sleeve 4 is moved in the direction of the temporary placing shaft, and the round blades on the arbor are collectively moved to the temporary placing shaft. The guide sleeve is parked there at the end of the arbor until a new blade is received. Next, the temporary setting shaft on which a new round blade or the like is set is connected to the arbor. Then, the round blade or the like on the temporary placing shaft is pushed by a pusher, and is moved onto the arbor as a sandwich with the guide sleeve waiting at the end of the arbor. In both the insertion and extraction of a round blade or the like, since the guide sleeve holds the posture of the round blade or the like, the round blade or the like moves on the shaft and the shaft connecting portion without causing self-lock.

Although a nut may be used as a method for tightening the round blade or the like, a method of a third embodiment described later is preferable for more complete automation.

The temporary placement of the round blade 8 or the like 8 on the small-diameter temporary placement shaft 31 can be easily performed manually, but for automation and reduction of labor, the hand 7 of the robot 6 is used. The round blade 8 may be temporarily placed on the temporary placing shaft 31.

Next, an embodiment in which the method and the apparatus for changing the blade of the round blade shearing machine according to claims 9 to 10 of the present invention are applied to a side trimmer will be described.

Embodiment 3 The same side trimmer is usually installed on both sides of the line. In this embodiment, only the right side in the line traveling direction is shown in FIGS. The side trimmer main body 52 is mounted on the common base 51, and opens and closes in accordance with the width of the shear plate and at the time of blade replacement. An upper round blade 54 is mounted on the upper arbor 53 of the side trimmer body, and a lower round blade 55 is mounted on the lower arbor. The arbor may be further provided with a spacer or a plate retainer 56.

The blade changing device includes an old blade receiving device 57, a new blade temporary placing device 58, a guide device 62 installed on the side trimmer main body, and a driving device 63 thereof. Each of the old blade receiving device 57 and the new blade temporary placing device 58 is provided with an upper and lower temporary placing shaft (connection shaft) 59, a pusher 60, and a pusher driving device 61. The guide device 62 corresponds to the guide sleeve. The side trimmer has a short arbor, and only one round blade is inserted per arbor. Therefore, since the hanging of the shaft was sufficiently smaller than the boundary inclination angle of the round blade or the like, the guide sleeve was not mounted, and the guide device 6 having a reference surface equivalent to the guide sleeve was not mounted.
2 was installed on the side trimmer main body 51. The assembly of the guide device was carried out by mounting a member corresponding to the guide sleeve on an arbor as an assembly adjusting jig, and tightening a connection portion with a guide drive device with the guide device in close contact with the end face. After that, the assembly adjustment jig equivalent to the guide sleeve was removed. Arbor 53 and blade replacement shaft (connection shaft)
The connecting portion 59 was designed in accordance with the above equations (6) to (9) in order to enable the movement of the round blade and the like, and was the same as in the second embodiment.

Further, in the present embodiment, the method of fixing the round blade to the arbor, which has conventionally been generally tightened with a nut, is changed. That is, a hydraulic cylinder having axially and radially movable projections 65 and 66 provided at the open end of the arbor, at a position where the nut was conventionally installed, and having the axial movement at the arbor drive side end. The operation is performed at 64, and the radial movement is such that the operating rod 65 protrudes in the axial direction toward the open end surface of the arbor, and when this is pushed into the shaft, the projection 66 is retracted into the arbor.

The blade replacement is performed by the following operation. First, the side trimmer body 51 is retracted, and at the same time, the hydraulic tightening is released. Then, the old blade receiving device 57 is advanced to connect the blade replacement shaft 59 and the arbor 53. At this time, the projection operation rod is pushed into the shaft, and the projection retracts into the arbor. Thus, the tightening of the round blade 54 in the axial direction is released, and the tightening protrusion is retracted into the shaft. Next round blade 54
And the plate retainer 56 are sandwiched between the guide device 62 and the pusher 60, and are moved onto the blade replacement shaft of the old blade receiving device 57. The same operation is performed for lower arbor and new blade insertion. The new blade is manually inserted into the round blade shaft 59 of the new blade temporary placing device 58 in advance. Then, the extracted old blade is manually removed from the blade replacement shaft of the old blade receiving device 57.

The connecting portion between the arbor 53 and the blade replacement shaft (connecting shaft) 59 can move the round blade or the like.
The design was performed according to the equation (9), and the design was the same as in the second embodiment. The round blade and the like are held on the reference plane of the guide device 62 and do not self-lock, and there is no obstacle in the movement of the connecting portion, so that the round blade easily moved on both axes. In this way, the blade change was performed automatically, and the downtime for the blade change of the process line equipped with the side trimmer was significantly reduced. In addition, the handling work of a round blade or the like for a blade replacement shaft that was manually performed without automation does not involve tightening of a nut or tight fitting with an arbor. Therefore, this is an easy operation using a handling assisting tool such as a weight balancer.

[0063]

According to the present invention, by preventing the self-lock phenomenon, automation by a general-purpose robot is enabled, a smaller gap between the round blade and the arbor can be selected, and the shear quality of the slitter is improved. Can be done. In addition, since a high-precision device is not required, facility costs can be significantly reduced. In addition, it can be applied to existing slitters.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a self-lock phenomenon that occurs when a round blade is inserted into an arbor of a round blade shearing machine.

FIG. 2 is an explanatory view showing a state in which another shaft is connected to the tip of an arbor.

FIG. 3 is a plan view showing one embodiment of a blade changing method and apparatus of a round blade shearing machine of the present invention, that is, a configuration in which a guide sleeve is provided on an existing slitter.

FIG. 4 is a front view of the slitter of FIG. 3;

FIG. 5 is an explanatory diagram of a hand of the robot in FIG. 3;

FIG. 6 is an explanatory diagram of a guide cap which is a delivery unit that can be inserted into the hand of the robot in FIG. 5;

FIG. 7 is a front view showing the configuration of a newly-installed slitter having a temporary setting shaft, which is another embodiment of the blade changing method and apparatus of the round blade shearing machine of the present invention.

FIG. 8 is a plan view of the newly provided slitter of FIG. 7;

FIG. 9 is a plan view showing a blade changing device for a side trimmer, which is still another embodiment of the blade changing method and device of the round blade shearing machine of the present invention.

FIG. 10 is a front view of the blade changing device of FIG. 9;

FIG. 11 is a front view of the side trimmer of FIG. 9;

[Explanation of symbols]

 3 Arbor 8 Round blade etc. 53 Upper arbor 54 Upper round blade

Claims (9)

[Claims] 1. A blade changing method for a round blade shearing machine for replacing a round blade and / or a spacer mounted on an arbor of the round blade shearing machine, wherein the round blade is slidably mounted on the arbor in advance. And / or a method for changing the blade of a round blade shearing machine, in which the round blade and / or the spacer is mounted on or removed from an arbor while being in contact with a guide sleeve having substantially the same inner diameter as the spacer. 2. A blade changing device for a round blade shearing machine for replacing a round blade and / or a spacer mounted on an arbor of a round blade shearing machine, which is previously slidably mounted on the arbor. Blade changing device for a round blade shearing machine with a guide sleeve having substantially the same inside diameter as the round blade and / or the spacer. 3. A blade changing method for a round blade shearing machine for replacing a round blade and / or a spacer mounted on an arbor of the round blade shearing machine, wherein (a) a round blade and / or Or hold the spacer from the inside,
(B) inserting the hand of the robot into the concave portion of the transfer section, and (c) placing or picking up the round blade and / or the spacer at the shaft end by the hand of the robot through the transfer section, thereby obtaining the round blade and / or the spacer. And / or a blade changing method for a round blade shearing machine for attaching or removing a spacer to or from an arbor. 4. A blade changing device for a round blade shearing machine for exchanging a round blade and / or a spacer mounted on an arbor of the round blade shearing machine, wherein the round blade shearing machine includes a delivery part. Blade changing device for 5. A blade changing device for a round blade shearing machine for replacing a round blade and / or a spacer mounted on an arbor of the round blade shearing machine, wherein (a) the round blade and / or the spacer. And (b) a blade changing device for a round blade shearing machine including a transfer part having a recess formed therein, into which the tip of the hand of the robot can be inserted. 6. A blade changing method for a round blade shearing machine for replacing a round blade and / or a spacer mounted on an arbor of the round blade shearing machine, wherein the blade changing method is substantially the same as the round blade and / or the spacer. When a guide sleeve having an inner diameter of slidably connects an arbor slidably mounted to another shaft, the shape of the butted portion of both shafts is adjusted to the posture of the round blade and / or spacer regulated by the guide sleeve. A blade changing method for a round blade shearing machine that enables a round blade and / or a spacer to move between two axes by making the dimensions and shapes that do not affect the shape. 7. A blade changing device for a round blade shearing machine for replacing a round blade and / or a spacer mounted on an arbor of the round blade shearing machine, wherein the blade changing device is substantially the same as the round blade and / or the spacer. When a guide sleeve having an inner diameter of slidably connects an arbor slidably mounted to another shaft, the shape of the butted portion of both shafts is adjusted to the posture of the round blade and / or spacer regulated by the guide sleeve. A blade changing device for a round blade shearing machine that allows the round blade and / or the spacer to move between two axes by having a dimension and shape that do not affect. 8. A blade changing method of a round blade shearing machine for replacing a round blade and / or a spacer mounted on an arbor of the round blade shearing machine, wherein (a) the method is provided in the round blade shearing machine. By bringing the round blade and / or the spacer into contact with a reference surface on which a normal extends in the same direction as the axial direction of the arbor of the guide device, (b) moving the guide device along the axial direction of the arbor A method for changing the blade of a round blade shearing machine for mounting or removing a round blade and / or a spacer from an arbor. 9. A blade changing device for a round blade shearing machine for replacing a round blade and / or a spacer mounted on an arbor of the round blade shearing machine, the blade changing device being installed in the round blade shearing machine, A blade changing device for a round blade shearing machine provided with a guide device having a reference surface on which a normal extends in the same direction as the arbor axial direction.