JPH0774061B2 - Strip tensioning device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a slitter line for cutting a wide strip into a plurality of strips along the longitudinal direction of the strip, and each slit strip after slitting the strip. The present invention relates to a strip tension applying device capable of adjusting an imbalance in tension generated when winding a sheet and applying uniform tension.

[Conventional technology]

In general, the cross section of a wide strip is not perfectly flat but is thick at the center and thin at both ends.When slitting this, there is a deviation in the thickness of each slit strip after slitting at the center and both ends of the strip. Cause When each of these slit strips is wound by a mandrel, the thick slit strip has a larger winding diameter than the thin slit strip, and there is a difference in the winding speed of each slit strip at the center and both ends. Occurs,
The tension of each slit strip wound around the mandrel becomes unbalanced. As a result, the slit strips at both ends wound on the mandrel are softer than the central part, and when pulled out from the mandrel, they become telescopic or crush into an elliptical shape for rewinding or transportation, etc. There was a drawback that it became impossible.

For this reason, tension was applied to the slit strips by a roller tension applying device or a tension pad system to prevent each slit strip wound on the mandrel from being softly wound. Due to the thickness deviation, the tension of each slit strip becomes unbalanced, and in the tension pad, there is a disadvantage that scratches are generated on the surface of the slit strip.

Therefore, the applicant has applied a strip tension applying device (Japanese Patent Application No. 55-15254) for adjusting the imbalance of the winding tension due to the thickness deviation of each slit strip without scratching the surface of each slit strip.
Invented 5).

This belt plate tension applying device uses an endless belt, in which a plurality of endless belts stretched between a pair of pulleys are laterally arranged, and the upper and lower endless belts are arranged. Insert the slit strip between the opposing outer surfaces of the endless strip, press the endless strip from above and below to the slit strip on the inner surface of the endless strip with the pressing body and press it together, and the endless strip becomes integral with the moving slit strip. It is a mechanism for causing the tension band of the slit band plate to be generated by the frictional force due to the sliding between the pressing body and the inner surface of the endless band, by circulating the band, and the friction coefficient of the outer surface of the endless band. Is larger than the inner surface, the slit strip plate and the endless strip can be wound without slipping and without being scratched.

[Problems to be solved by the invention]

By the way, the pressing body constituting the above-mentioned strip tension applying device is extended in a direction orthogonal to the moving direction of each slit strip, and both ends thereof are interlocked and coupled to the cylinder mechanism,
It was operated by the driving force of the cylinder mechanism, and each endless strip was pressed against each slit strip plate for pressure bonding.

At this time, if the pressing body is a completely rigid body, when both ends of the pressing body are pressed by the cylinder mechanism, the pressing body contacts all of the slit strip plates indirectly contacting the pressing body via the endless strip. Although it is possible to apply pressure evenly to, the pressing body is not a perfect rigid body, so when applying pressure to each slit strip, compared to the slit strips near both ends where the cylinder mechanism is connected, There is a problem that the pressure tends to be weakened in the central slit band plate.

Further, the cylinder mechanism, which is a drive source for applying pressure to each slit strip, has a complicated structure and is difficult to be miniaturized. Therefore, it is difficult to make the structure of the entire device simple and compact.

The present invention has been made in view of the above problems and was devised to solve the problems, and its object is to evenly apply each slit strip plate through an endless strip. (EN) Provided is a strip tension applying device which can apply a pressure to the device, and can simplify the structure of the entire device without requiring a cylinder mechanism which has a complicated structure and is difficult to downsize. is there.

[Means for solving problems]

In order to achieve the above object, the present invention has a plurality of endless belts, which are rotatably held by a non-driving source and arranged in the lateral direction, are vertically opposed to each other, and the upper and lower endless belts are disposed. Endless strips are pressed from above and below with a crimping plate placed on the inner surface side of the endless strips to the slit strips that pass between the opposite outer surfaces of the endless strips, and frictional engagement with each moving slit strip plate The endless belts are driven by the above, and each endless belt is independently circulated integrally with each moving slit strip plate, and the frictional force due to the slip between the crimping plate and the inner surface of the endless belt. In the strip tension applying device that generates the tension of the slit strip with
At least one of the upper and lower pressure-bonding plates is provided with an expansion / contraction body that uniformly presses against the inner surface of the endless belt by fluid pressure.

[Action]

The present invention having the above configuration operates as follows.

After passing the slit strips between the outer surfaces of the upper and lower endless strips facing each other, when the fluid pressure of the expandable body that presses the inner surface of the endless strip is increased to a certain pressure, all the Due to the property that the points have the same pressure, the expandable body presses the entire area of the inner surface of the endless strip that is in contact with the expandable body with the same pressure, and the expandable body is the endless strip and the expandable body. It acts to evenly apply pressure to all of the slit strips that are in indirect contact with each other.

Then, each endless belt is integrally circulated independently of the slit strip plate due to frictional engagement with each moving slit strip plate without causing slippage, and independently circulates. The frictional force due to the slippage with the inner surface acts so as to apply uniform tension to each slit strip plate without scratching the slit strip plate surface.

〔Example〕

Hereinafter, the present invention will be described more specifically based on the embodiments illustrated in the drawings.

Here, FIG. 1 is a front view of the strip tension applying device, FIG. 2 is a side view of the strip tension applying device, and FIG. 3 is an enlarged side view of a main part of the strip tension applying device.

In the figure, reference numeral 1 is a strip tension applying device for imparting a predetermined tension to the slit strip 2. The strip tension applying device 1 is a moving passage of the slit strip 2 in front of a slit strip winding device (not shown). It is located in the middle of. Strip tensioning device 1
Is mainly composed of an endless belt 3 which is vertically opposed to each other and is rotatably held, and a pressure applying body 4 and a pressing body 5 which press the inner surface 3a of the endless belt 3. The pressure applying body 4 presses the endless belt 3 arranged on the lower side upward, while the pressing body 5 presses the endless belt 3 arranged on the upper side downward.

The endless strips 3 are arranged so as to be able to circulate in the moving direction of the slit strip plate 2, and the endless strips 3 are arranged side by side in the transverse direction, that is, in the direction orthogonal to the moving direction of the slit strip plate 2. They are arranged opposite to each other. The endless belts 3 arranged in parallel vertically are stretched around the pulleys 6, respectively.

The outer surface 3b of the endless strip 3 functions integrally with the slit strip 2 to move the slit strip 2. On the other hand, the inner surface 3a of the endless strip 3 has a function of generating a tension in the slit strip plate 2 by a frictional force caused by sliding between the endless strip 3 and the pressure applying body 4 or the pressing body 5.

Due to such a difference in function, the outer surface 3b of the endless belt 3 is
Are made of a material having a friction coefficient larger than that of the inner surface 3a. For example, the outer surface 3b is made of soft urethane resin or rubber, and the inner surface 3a is made of hard nylon or copper plate.

The pulleys 6 located on the lower side and the upper side are respectively rotatably attached to rotary shafts 7 and 8 provided on the lower side and the upper side. That is, each pulley 6 is independently rotatably supported so as to be rotatable in the moving direction of the slit strip plate 2, so that each endless strip 3 can be independently circulated in the moving direction of the slit strip plate 2. Has become.

Further, no drive source is attached to each pulley 6 rotatably supported by the rotating shafts 7 and 8, that is, the endless belt 3 is rotatably held by the non-drive source, In addition to the circular movement of the strip 3 by frictional engagement with the moving slit strip 2,
It does not circulate by itself. That is, the endless band 3 does not circulate unless it contacts the slit band plate 2.

The rotating shafts 7 and 8 are arranged in a direction orthogonal to the moving direction of the slit strip plate 2 and are inserted through the inside of the endless strip 3. Out of these, both ends of the rotary shaft 7 provided laterally on the lower side extend from the side of the endless belt 3 and are supported by bearings 7a provided on the lower surface of the holding body 11, which will be described later. Further, both ends of the rotating shaft 8 provided on the upper side are supported by bearings 8a provided on the upper surface of the pressing body 5 so as to project from the side of the endless belt 3. These bearings 7a and 8a are configured to move up and down by, for example, a screw movement, and the rotating shafts 7 and 8 are lifted and lowered by the lifting and lowering operation of the bearings 7a and 8a, respectively, and can freely rotate on the rotating shafts 7 and 8, respectively. The tension of each endless belt 3 can be adjusted by each pulley 6 attached to the.

The pressure applying body 4 is arranged so as to pass through the inside of the endless belt 3 arranged on the lower side. The pressure applying body 4 arranged in such a state includes the crimping plate 9 that directly presses the inner surface 3a of the endless strip 3 and the expansion and contraction that presses the crimping plate 9 against the inner surface 3a of the endless strip 3. The body 10 and the pressure-bonding plate 9 and the holding body 11 that holds the expansion / contraction body 10 from below are configured.

The crimping plate 9 is formed of a plate having a constant width, length and thickness, its longitudinal direction is arranged orthogonal to the moving direction of the slit strip plate 2, and is inserted through the inside of the endless strip 3. is doing. The upper surface of the crimping plate 9 in contact with the inner surface 3a of the endless strip 3 is finished flat so that the inner surface 3a of the endless strip 3 can be pressed uniformly. Further, the surface of the upper surface of the crimping plate 9 is finished so that friction with the inner surface 3a of the endless band 3 is reduced.

The width direction of the crimping plate 9 is the same as the moving direction of the slit strip plate 2, and each endless strip 3 circulates in the width direction of the crimping plate 9. Therefore, the thickness sides of both width edges of the upper surface of the crimping plate 9 are finished in an arc shape, and the roller devices 9a are provided on both width side surfaces of the holding body 11 therebelow, and the endless belt 3 is provided with the pressure applying body 4. It is designed to smoothly circulate around. A cooling groove 9b is provided inside the crimping plate 9. By changing the width dimension of the crimping plate 9, the endless strip 3
The contact area between the slit band plate 2 and the slit band plate 2 can be increased or decreased.

The width dimension of the crimping plate 9 is determined in consideration of the space of the line in which the strip tension applying device 1 is installed.
By reducing the width dimension of the crimping plate 9, the dimension of the strip tension applying device 1 in the line direction can be reduced, and the strip tension applying device 1 can be installed in a place where the installation space is insufficient. .

The expansion / contraction body 10 is held in a state of being vertically sandwiched by the upper crimping plate 9 and the lower holding body 11. Expandable body 10
Has a hollow shape having a constant width, length and thickness, the longitudinal direction of which is arranged orthogonal to the moving direction of the slit strip plate 2 and is inserted through the inside of the endless strip 3. The expander / contractor 10 has a hollow interior in which a fluid is sealed, and is made of a sealing material that does not cause leakage of the fluid inside, and is also made of a material having a high expandability, such as a synthetic resin.

The expansion / contraction body 10 expands / contracts by the pressure of the fluid inside, and uniformly presses the lower surface of the crimping plate 9 arranged on the upper surface side thereof based on the property of the fluid pressure. Then, the expansion / contraction body 10 can uniformly press the slit band plate 2 via the pressure bonding plate 9. In addition, the expansion and contraction body
By changing the pressure of the fluid inside 10, the pressing force for pressing the crimping plate 9 can be changed, and the pressing force for pressing the slit strip plate 2 via the crimping plate 9 can be changed. For example, air or oil is used as the fluid.

Like the pressure-bonding plate 9 and the expansion / contraction body 10, the holding body 11 is also arranged such that its longitudinal direction is orthogonal to the moving direction of the slit strip plate 2 and is inserted through the inside of the endless strip 3. . The holding body 11 holding the crimping plate 9 and the expansion / contraction body 10 is made of a material and a shape having a certain degree of rigidity, and both sides thereof are fixed to the pair of bases 15. The holding body 11 fixed to the pair of bases 15 reliably supports the crimping plate 9 and the expansion / contraction body 10 from below.

The pressing body 5 is arranged so as to pass through the inside of the endless band 3 arranged on the upper side. The pressing body 5 arranged in such a state includes the crimping plate 12 that directly presses the inner surface 3a of the endless strip 3 and a holding body that holds the crimping plate 12 from above.
It is composed of 13 and.

The lower surface of the crimping plate 12 in contact with the inner surface 3a of the endless strip 3 is finished parallel and flat with the upper surface of the crimping plate 9 constituting the pressure applying body 4, so that the inner surface 3a of the endless strip 3 is made uniform. It can be pressed. Further, the surface of the lower surface of the crimping plate 12 is finished so as to reduce friction with the inner surface 3a of the endless band 3.

The width direction of the crimping plate 12 is the same as the moving direction of the slit strip plate 2, and each endless strip 3 circulates in the width direction of the pressing body 5. For this reason, the thickness sides of both width edges of the lower surface of the crimping plate 12 are finished in an arc shape, and the roller devices 12a are provided on the both width side surfaces of the holding body 13 above it, and the endless band 3 of the pressing body 5 is provided. It is designed to smoothly circulate around. Also,
A cooling groove 12b is provided inside the pressure bonding plate 12.

The width dimension of the crimping plate 12 is the same as the width dimension of the crimping plate 9, and the slit strip plate 2 passing between the vertically opposed endless strips 3 is pressed in the same state from above and below. , A constant tension can be applied.

The holding body 13 holding the crimping plate 12 from above is made of a material and a shape having a certain degree of rigidity, and is fixed to the pair of bases 15. Like the crimping plate 12, this holder 13 is also arranged such that its longitudinal direction is orthogonal to the moving direction of the slit band plate 2 and is inserted through the inside of the endless band 3. The holder 13 fixed to the base 15 securely holds the crimping plate 12 from above.

A recess 15a for fixing the holding body 11 is formed in the center of the upper surface of the base 15, and a fixing base 14 is attached to the upper surface of the base 15. A recess 14 for fixing a holding body 13 of the pressing body 5 described later is formed in the center of the upper surface of the fixing base 14.
a is formed. Holes 14c for the lock mechanism are formed in the left and right side wall surfaces 14b of the recess 14a, and holes 13a are formed in the side surfaces of the holding body 13 described later, and lock bars are provided in these holes 13a, 14c.
14d is inserted. The fixing base 14 is a base 15 with bolts 17
It is fixed to.

The holders 11 and 13 described above are columns 1 fixed to the side surface of the base 15.
The depression and depression can be performed by expanding and contracting the drive device 18 around the six pivot shafts 16a and 16b. The substrate 20 to which the base 15 is attached is configured to be movable in a direction orthogonal to the moving direction of the slit strip 2 by the driving device 19.

Next, the operation of the strip tension applying device based on the configuration of the above embodiment will be described.

After passing the slit strip 2 between the outer surfaces 3b of the endless strips 3 which are vertically opposed to each other, the fluid is press-fitted into the expansion / contraction body 10 constituting the pressure applying body 4 to expand the expansion / contraction body 10. . The fluid is forcibly pressed into the expansion / contraction body 10 by a pump or the like (not shown).

The expanded and contracted body 10 is a holding body which contacts the expanded and contracted body 10 vertically.
11 and the crimping plate 9 are pressed, but due to the property that all the points in the fluid have the same pressure, the expansion / contraction body 10 has the same pressure over the entire range of the holding body 11 and the crimping plate 9 in contact with the expansion / contraction body 10. Press with.

At this time, while the holding body 11 is completely fixed to the base 15, the crimping plate 9 is held by the expanding and contracting body 10 which can expand and contract.
Since it is supported vertically by the
The amount of swelling 10 in the vertical direction is all converted to the amount of moving the crimping plate 9 upward. The upper surface of the crimping plate 9 and the endless band 3
If there is a slight gap between the inner surface 3a and the inner surface 3a, the crimping plate 9 moves upward so that the upper surface of the crimping plate 9 is completely adhered to the inner surface 3a of the endless strip 3.

On the other hand, when the upper surface of the crimping plate 9 is in complete contact with the inner surface 3a of the endless strip 3, the crimping plate 9 pressed upward by the fluid pressure of the expansion / contraction body 10 is integrated with the endless strip. The strip moves upwards, and the outer surface 3b of the endless strip 3 in close contact with the crimping plate 9
Completely adheres to the surface of the slit strip plate 2.

After the outer surface 3b of the endless band 3 is completely adhered to the back surface of the slit band plate 2, the slit band plate 2 is pressed upward, and the outer surface 3b of the upper endless band 3 and the slit band plate 2 are pressed. The surfaces of the slit strip plate 2 are pressed against each other from above and below by the outer surfaces 3b of the upper and lower endless strips 3 which are opposed to each other to make a reaction force. At this time, due to the property that all points in the fluid of the expandable / contractible body 10 have the same pressure, the entire range of the front and back surfaces of the slit strip plate 2 in close contact with the outer surfaces 3b of the upper and lower endless strips 3 facing each other A uniform pressure is applied to.

When the winding of the slit strip 2 is started, the upper and lower endless strips 3 circulate due to the frictional engagement between the front and back surfaces of the moving slit strip 2 and the outer surface 3b of the endless strip 3.
At this time, the endless strips 3 integrally move with the moving slit strips 2 without slipping and independently circulate. On the other hand, by the frictional force due to the slip between the pressure bonding plates 9 and 12 forming the pressing body 5 and the pressure applying body 4 and the inner surface 3a of the endless strip 3, that is, the moving slit strip plate 2. Inner surface 3a of the endless belt 3 that circulates due to the frictional engagement of
The pressure-bonding plates 9 and 12 that press against each other perform a so-called braking function to generate a constant tension on each slit strip plate 2 located between the slit strip winding device (not shown) and the strip tension applying device 1. Of.

The present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the structure in which the inner side of the endless strip 3 arranged on the upper side is pressed by the pressing body 5 has been described, but instead of the pressing body 5, the pressure applying body 4 may be pressed. The pressure applying bodies 4 and the pressing bodies 5 arranged on the lower side and the upper side may be reversed, that is, the pressing bodies 5 may be arranged on the lower side and the pressure applying bodies 4 may be arranged on the upper side.

〔The invention's effect〕

As is clear from the above description, according to the strip tension applying device of the present invention, due to the property that all points in the fluid have the same pressure, the expansion / contraction body is an endless member in contact with the expansion / contraction body. Since the entire area of the inner surface of the strip is pressed with the same pressure, the pressure can be uniformly applied to all of the slit strips that are in indirect contact with the expansion and contraction body through the endless strip.

As a result, it is possible to surely adjust the imbalance of the tension generated when winding each slit strip and apply uniform tension, and it is possible to fully exhibit the excellent advantages originally possessed by this device. Become.

Moreover, since the pressure can be evenly applied to the entire range of the slit band plate only by increasing the fluid pressure of the expandable and contractible body, a cylinder mechanism having a complicated structure and difficult to miniaturize may be unnecessary,
The structure of the entire device can be made simple and compact.

In addition, since the structure of the entire apparatus is simple and small, maintenance and inspection work can be facilitated, and extremely new and beneficial effects can be obtained.

[Brief description of drawings]

The drawings show an embodiment of the strip tension applying device according to the present invention. FIG. 1 is a front view of the strip tension applying device, FIG. 2 is a side view of the strip tension applying device, and FIG. [Fig. 3] is an enlarged side view of a main part of the strip tension applying device. (Explanation of symbols) 1: Strip tension applying device, 2: Slit strip 3: Endless strip, 3a: Inner surface 3b: Outer surface, 4: Pressure applying body 5, Pressing body, 6: Pulley 7: Rotation Shaft, 7a: Bearing 8: Rotating shaft, 8a: Bearing 9: Crimping plate, 9a: Roller device 9b: Cooling groove, 10: Expansion / contraction body 11: Holding body, 12: Crimping plate 12a: Roller device, 12b: Cooling Groove 13: Holder, 13a: Hole 14: Fixed base, 14a: Recess 14b: Side wall, 14c: Hole 14d: Lock bar, 15: Base 15a: Recess, 16: Strut 16a: Pivot, 16b : Pivot 17: Bolt, 18: Drive device 19: Drive device, 20: Board

Claims (1)

[Claims] 1. A plurality of endless belts, which are rotatably held by a non-driving source and arranged in the lateral direction, are vertically arranged to face each other. An endless strip is pressed from above and below with a crimping plate placed on the inner surface side of the endless strip to press it into the slit substrate, and each endless strip is driven by frictional engagement with each moving slit strip. , Integrate with each moving slit strip to independently circulate each endless strip, and generate the tension of the slit strip by the frictional force caused by the sliding between the crimp plate and the inner surface of the endless strip. In the strip plate tension applying device, a strip plate tension applying device is provided, in which at least one of the upper and lower pressure-bonding plates is provided with an expansion / contraction body that uniformly presses the inner surface of the endless band with a fluid pressure. .