JPH0320009Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is based on a slitting line that cuts a wide strip into multiple strips along the longitudinal direction of the strip. Relating to a strip tensioning device that can adjust tension imbalance that occurs when winding a strip and apply uniform tension,
In particular, the present invention relates to a strip tensioning device that allows parts to be easily replaced.

[Conventional technology]

Generally, the cross section of a wide strip is not completely flat, and is thicker in the center and thinner at both ends. When slitting this, the thickness of each slit strip at the center and both ends of the strip after slitting will vary. arise.
When each of these slit strips is wound with a mandrel, a thicker slit strip has a larger winding diameter than a thinner one, and there is a difference in the winding speed of each slit strip between the center and both ends. arise,
The tension in each slit strip wound on the mandrel becomes unbalanced. As a result, the slit strips at both ends wound around the mandrel are wound more softly than at the center, and when removed from the mandrel, become telescopic or crushed into an elliptical shape, making it difficult to unwind or transport. There was a drawback that it became impossible to do so.

For this reason, tension was applied to the slit strip using a roller-type tensioning device or a tension pad method to prevent each slit strip from becoming loose when wound around a mandrel. Due to the deviation, the tension of each slit strip becomes unbalanced, and the tension pad has the disadvantage that scratches occur on the surface of the slit strip.

Therefore, the applicant proposed a strip tensioning device (Japanese Patent Publication No. 25617/1983) that adjusts the imbalance in the winding tension caused by the thickness deviation of each slit strip without damaging the surface of each slit strip. He came to invent this.

This belt tensioning device utilizes an endless belt, in which a plurality of endless belts stretched between a pair of pulleys are arranged in the horizontal direction, and the upper and lower endless belts are arranged vertically. A slit strip is passed between the opposing outer surfaces of the endless strip, and on the inner surface of the endless strip, a pressure bonding plate is used to press and bond the endless strip against the slit strip from above and below, and the endless strip becomes one with the moving slit strip. This mechanism generates tension in the slit strip by the frictional force caused by sliding between the crimp plate and the inner surface of the endless strip by circulating the strip, and the friction coefficient of the outer surface of the endless strip is By making the slit strip larger than the inner surface, the slit strip and the endless strip can be wound without slipping and the slit strip can be wound without damage.

[Problem that the invention attempts to solve]

By the way, in the above-described belt tensioning device, the endless belt wears out, so it is necessary to periodically replace it with a new endless belt.

The endless strip is attached around the crimp plate,
On the other hand, both ends of the crimp plate are interlocked and connected to the cylinder mechanism. That is, the cylinder mechanism is configured to press down and support both ends of the crimp plate.

Therefore, when replacing the endless band attached around the crimp plate on a regular basis, remove the cylinder mechanism that supports both ends of the crimp plate, replace the endless band, and then replace the cylinder mechanism again. It is attached to both ends of the crimp plate.

However, the removal and installation of the cylinder mechanism cannot be done easily because the cylinder mechanism has a certain amount of weight and size, and as a result, periodic replacement of the endless band is extremely difficult. There was a problem in that it required a lot of work.

This invention was devised to solve the problems mentioned above, and its purpose is to eliminate the need for a cylinder mechanism that is inconvenient when replacing endless bands. An object of the present invention is to provide a band tensioning device that can simplify and facilitate the replacement work of an endless band.

[Means for solving problems]

In order to achieve the above purpose, this invention consists of a plurality of horizontally arranged endless bands held so as to be able to freely circulate, which are arranged vertically facing each other, and the upper and lower endless bands facing each other. A crimping plate placed on the inner surface side of the endless band presses the endless band from above and below against the slit band plate passed between the outer surfaces, and the friction between each endless band and each slit band plate moves. The slit strips are driven together with each moving slit strip to rotate each endless strip independently, and the slit strips are moved by the frictional force caused by the sliding between the crimp plate and the inner surface of the endless strip. In the band tensioning device that generates tension, an expansion/contraction body is provided which presses at least one of the pressure bonding plates disposed above and below against the inner surface of the endless band evenly using fluid pressure, and is capable of freely circulating up and down. The endless band is supported so as to be able to move up and down.

[Effect]

This invention having the above configuration operates as follows.

The expansion and contraction body that presses the pressure bonding plate against the inner surface of the endless band uses the property of fluid that all points in the fluid have the same pressure to apply pressure evenly to each slit band plate. At the same time, it also functions to eliminate the need for a cylinder mechanism having a weight and size that is inconvenient for replacing the endless band.

〔Example〕

This invention will be described in more detail below based on embodiments shown 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, FIG. 3 is an enlarged side view of essential parts of the strip tension applying device, and FIG. 4 is a side view of the strip tension applying device when parts are replaced.

In the figure, reference numeral 1 denotes a strip tension applying device that applies a predetermined tension to the slit strip 2. The strip tension applying device 1 is located on the front side of a slit strip winding device (not shown), and is located on the moving path of the slit strip 2. It is located in the middle of. The belt tension applying device 1 mainly consists of an endless belt 3 which is vertically opposed and rotatably held, and a pressure applying body 4 and a pressing body 5 that press an inner surface 3a of the endless belt 3. It is composed of The pressure applying body 4 presses the endless band 3 disposed on the lower side upward, while the pressing body 5 presses the endless band 3 disposed on the upper side downward.

The endless bands 3 are arranged so as to be able to circulate freely in the direction of movement of the slit band plate 2, and a plurality of endless bands 3 are arranged side by side in the lateral direction, that is, in the direction orthogonal to the direction of movement of the slit band plate 2, and furthermore, these are arranged vertically. are placed opposite each other. Each of the endless bands 3 arranged vertically in parallel is stretched around each pulley 6, respectively.

The outer surface 3b of the endless band 3 is connected to the slit band plate 2.
It functions to move the slit strip plate 2 together with the slit strip plate 2. On the other hand, the inner surface 3a of the endless band 3 is
The function is to generate tension in the slit strip plate 2 by the frictional force caused by the sliding between the slit strip plate 2 and the slit strip plate 2.

Because of this difference in function, the outer surface 3b of the endless band 3 is made of a material with a larger coefficient of friction than the inner surface 3a. For example, outer surface 3b
is made of soft urethane resin, rubber, etc., and the inner surface 3a is made of hard nylon, copper plate, etc.

The pulleys 6 located on the lower and upper sides are freely rotatably attached to rotating shafts 7 and 8 provided horizontally on the lower and upper sides, respectively. That is, each pulley 6
are pivotally supported so as to be able to rotate independently in the direction of movement of the slit strip 2, so that each endless band 3 can independently rotate in the direction of movement of the slit strip 2.

Further, each pulley 6 rotatably supported by the rotating shafts 7 and 8 has no drive source attached to it, and the endless band 3 moves in circulation due to frictional engagement with the moving slit band plate 2. Other than that, it does not circulate on its own.
In other words, the endless band 3 does not circulate unless it comes into contact with the slit band plate 2.

The rotating shafts 7, 8 are disposed perpendicularly to the direction of movement of the slit strip 2, and are inserted through the inside of the endless strip 3. Of these, both ends of the rotation shaft 7 installed horizontally on the lower side come out from the sides of the endless band 3 and are attached to bearings 7a provided on the lower surface of the holder 11, which will be described later.
is supported by Further, both ends of a rotating shaft 8 horizontally installed on the upper side protrude from the sides of the endless band 3 and are supported by bearings 8a provided on the upper surface of the pressing body 5. These bearings 7a, 8a are configured to move up and down by, for example, screw movement.
The rotation shafts 7, 8 are moved by raising and lowering the bearings 7a, 8a.
The tension of each endless band 3 can be adjusted by raising and lowering the pulleys 6, which are freely rotatably attached to the rotating shafts 7 and 8, respectively.

The pressure applying body 4 is disposed so as to pass through the inner side of the endless band 3 disposed on the lower side. The pressure applying body 4 arranged in such a state has a pressure bonding plate 9 that directly presses the inner surface 3a of the endless band 3.
, an expansion and contraction body 10 that presses the pressure bonding plate 9 against the inner surface 3a of the endless band 3, and a holding body 11 that holds the pressure bonding plate 9 and the expansion and contraction body 10 from below.

The crimp plate 9 has a plate shape with a constant width, length, and thickness, and its longitudinal direction is parallel to the slit strip plate 9.
It is disposed in a direction perpendicular to the direction of movement of the belt 3, and is inserted through the inside of the endless belt 3. The upper surface of the pressure bonding plate 9, which is in contact with the inner surface 3a of the endless band 3, is finished flat so that the inner surface 3a of the endless band 3 can be pressed uniformly. Further, the upper surface of the pressure bonding plate 9 is finished so as to reduce friction with the inner surface 3a of the endless band 3.

The width direction of the pressure bonding plate 9 is the same direction as the moving direction of the slit strip plate 2, and each endless band 3 moves in a circular manner in the width direction of the pressure bonding plate 9. Therefore, the thicker sides of both width edges of the upper surface of the pressure bonding plate 9 are finished in an arc shape, and roller devices 9a are provided on both width sides of the holding body 11 below the pressure bonding plate 9, and the endless band 3 is connected to the pressure applying body 4. It is designed to allow smooth circulation around the Also,
Cooling grooves 9b are provided inside the crimp plate 9. By changing the width dimension of the pressure bonding plate 9, the contact area between the endless band 3 and the slit band plate 2 can be increased or decreased.

The width of the crimp plate 9 is determined by taking into consideration the space of the line in which the strip tensioning device 1 is installed, and in particular, by reducing the width of the crimp plate 9, the strip tensioner in the line direction is The dimensions of the tensioning device 1 can be reduced, and the strip tensioning device 1 can be installed in locations where there is insufficient installation space.

The expansion and contraction body 10 is held between an upper pressure bonding plate 9 and a lower holding body 11 in a vertically sandwiched state. The expansion/contraction body 10 has a hollow shape having a certain width, length, and thickness, and its longitudinal direction is arranged perpendicular to the moving direction of the slit strip plate 2.
It also passes through the inside of the endless band 3. Expanding body 10
It has a hollow interior sealed with fluid, and is made of a sealing material that prevents leakage of the fluid inside, and is also made of a material with high expansion and contraction properties, such as synthetic resin.

The expansion and contraction body 10 expands and contracts due to the pressure of the internal fluid, and uniformly presses the lower surface of the pressure bonding plate 9 disposed on the upper surface side based on the properties of the fluid pressure. And the expansion and contraction body 10
The slit strip plate 2 can be pressed uniformly through the pressure bonding plate 9. Furthermore, by changing the pressure of the fluid inside the expansion/contraction body 10, the pressing force for pressing the crimp plate 9 can be changed, and the pressing force for pressing the slit strip plate 2 via the crimp plate 9 can be changed. For example, air, oil, etc. are used as the fluid.

Like the pressure bonding plate 9 and the expansion/contraction body 10, the holding body 11 is also disposed so 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 that holds the pressure bonding plate 9 and the expansion/contraction body 10 is made of a material and shape having a certain degree of rigidity, and has a pair of bases 1 on both sides.
It is fixed at 5. Further, one end of the holder 11 is pivoted to a column 16 fixed to the side surface of one of the bases 15 so as to be able to move up and down. The holding body 11 fixed to a pair of bases 15 includes a pressure bonding plate 9 and an expansion/contraction body 1.
0 securely from below.

A pair of bases 15 are installed facing each other on both sides of the slit strip plate 2, that is, in a direction perpendicular to the direction of movement of the slit strip plate 2. At the center of the upper surface of each base 15, the above-mentioned holder 11 is installed. Recesses 15a are formed for fixing both side surfaces and the lower surface of. Further, a fixed base 14 is attached to the upper surface of the base 15. On the pair of bases 15, a holder 11 of the pressure applying body 4 and a holder 13 of the pressing body 5, which will be described later, are placed vertically and in parallel above them via the fixing base 14. . These holders 1
1 and 13 are fixed to a fixed base 14 and a base 15, respectively.

A recess 14a is formed in the center of the upper surface of the fixing base 14 for fixing both sides and a lower surface of the holding body 13 of the pressing body 5, which will be described later. A hole 14c is formed. Similarly, a hole 13a is formed on the side surface of the holder 13, which will be described later, corresponding to the position of this hole 14c, and a lock rod 14 is formed in these holes 13a, 14c.
d is inserted, and the holding body 13 of the pressing body 5 is fixed to the fixing base 14.

Furthermore, bolt holes for fixing the fixing table 14 to the top surface of the base 15 are vertically drilled in both edges of the upper surface of the fixing table 14, and the bolt holes have holes extending downward from the top to the bottom. The bolt 17 is screwed in, and the tip side of the bolt 17 is screwed into the top surface of the base 15.
A fixed stand 14 is fixed to the upper surface of a base 15. Further, the central portion of the lower surface of the fixing base 14 projects downward, and this projecting surface holds down the upper surface of the holder 11 of the pressure applying body 4. As a result, upward movement of the holder 11 is prevented, and the holder 11 of the pressure applying body 4 is securely fixed in the recess 15a of the base 15.

As described above, one end side of the holder 11 is pivotably supported on the support column 16 so as to be able to move up and down, and one end side of the holder 13 of the pressing body 5, which will be described later, is pivoted above the support 16 so that it can be moved up and down. . Further, the tip of a drive device 19 is connected to one end of each of the holders 11 and 13 located behind the column 16, and these holders 11 and 13 rotate around the pivot shafts 16a and 16b of the column 16. The vertical movement is suppressed by the expansion and contraction of the drive device 18.

A base 15 that supports the pressure applying body 4 and the pressing body 5 described above is mounted on a substrate 20. Board 2
0 is configured to be movable by a drive device 19 in a direction perpendicular to the direction of movement of the slit strip plate 2.

The pressing body 5 is an endless band 3 disposed on the upper side.
It is placed so that it passes through the inside of the. The pressing body 5 disposed in this manner includes a pressure bonding plate 12 that directly presses the inner surface 3a of the endless band 3, and a holder 13 that holds the pressure bonding plate 12 from above.

A pressure bonding plate 12 in contact with the inner surface 3a of the endless band 3
The lower surface of is a pressure bonding plate 9 that constitutes the pressure applying body 4.
The inner surface 3a of the endless band 3 can be pressed uniformly. Further, the lower surface of the pressure bonding plate 12 is finished so as to reduce friction with the inner surface 3a of the endless band 3.

The width direction of the pressure bonding plate 12 is the same direction as the moving direction of the slit band plate 2, and each endless band 3 moves in a circular motion in the width direction of the pressing body 5. For this reason, the thicker sides of both width edges of the lower surface of the pressure bonding plate 12 are finished in an arc shape, and the roller devices 12 are installed on both width sides of the holder 13 above the pressure bonding plate 12.
a is provided so that the endless band 3 can smoothly circulate around the pressing body 5. Furthermore, cooling grooves 12b are provided inside the crimp plate 12.

The width dimension of the crimp plate 12 is the same as the width dimension of the crimp plate 9, and the endless bands 3 are vertically opposed to each other.
The slit strip plates 2 passing between them can be pressed in the same manner from above and below to apply a constant tension.

The above-mentioned holder 13 holds the crimp plate 12 from above.
are made of a material and shape having a certain degree of rigidity, and are fixed to the pair of bases 15 described above. Like the pressure bonding plate 12, this holder 13 is also disposed with its longitudinal direction perpendicular to the direction of movement of the slit strip plate 2, and is inserted through the inside of the endless strip 3. The holder 13 fixed to the base 15 is attached to the pressure bonding plate 1
2 securely from above.

Next, a method of replacing parts of the strip tensioning device based on the configuration of the above embodiment will be explained.

When replacing the endless band 3 held around the pressing body 5, proceed as follows.

First, the lock rod 14d inserted in communication with the hole 13a formed in the side surface of the holding body 13 of the pressing body 5 and the hole 14c formed in the side wall surface 14b of the recess 14a of the fixing base 14 is extracted. . As a result, the holding body 13 is released from the fixed state with the fixed base 14.

Next, the other end of the holder 13 is rotated obliquely upward about the pivot shaft 16a at one end of the holder 13, which is pivotally supported by the support column 16. This rotation is caused by the drive device 19
This is done by retracting the piston. In this case, the other end of the holder 13 is raised until the extension line of the lower end of the endless band 3 held around the holder 13 is inclined to be above the upper surface of the fixing base 14.

Thereafter, the worn out old endless band 3 is extracted from the other end of the holding body 13 diagonally upward. When pulling out the endless band 3, the endless band 3 is loosened in advance to eliminate resistance when pulling out the endless band 3 from the pulley 6 and the crimp plate 12. Relaxation of the endless band 3 is achieved by lowering the bearing 8a of the rotation shaft 8 to which the pulley 6 is attached.

Then, after all the old endless bands 3 are pulled out from the other end of the holder 13, a new endless band 3 is inserted from the other end of the holder 13, and each endless band 3 is attached to each pulley 6 one by one. . Thereafter, the retracted piston rod of the drive device 19 is extended, the holder 13 is rotated downward around the pivot shaft 16a, the other end is lowered, and the holder 13 is placed in the recess 14a of the fixed base 14. position. And lock rod 14d
The hole 14c of the fixing base 14 and the hole 13a of the holder 13
By inserting the holding body 13 into the fixing base 14, the holding body 13 is completely fixed to the fixing base 14, and the replacement work of the endless band 3 is completed.

In addition, a pressure applying body 4 located below the pressing body 5
When replacing the endless band 3 held around the holder, the holder 13 of the pressing member 5 located above is tilted upward in advance, and then the process is performed in the same manner as described above. (See Figure 4).

On the other hand, the strip tension applying device based on the configuration of the above embodiment functions as follows.

After passing the slit strip plate 2 between the opposing outer surfaces 3b of the upper and lower endless strips 3, the expansion and contraction body 10 of the pressure applying body 4 presses the inner surface 3a of the endless strip 3.
When the fluid pressure is increased to a constant pressure, all points in the fluid have the same pressure.
The entire range a is pressed with the same pressure, and the expansion/contraction body 10 equally applies pressure to all of the slit strips 2 that are indirectly in contact with each other via the pressure bonding plate 9 and the endless strip 3.

When winding of the slit band plate 2 is started, the upper and lower endless bands 3 move in circulation due to the frictional engagement between the front and back surfaces of the moving slit band plate 2 and the outer surface 3a of the endless band 3. At this time, each of the endless bands 3 rotates independently of the moving slit band plates 2 while being integrated with them without slipping. On the other hand, due to the frictional force caused by the sliding between the pressure bonding plates constituting the pressing body 5 and the pressure applying body 4 and the inner surface 3a of the endless band 3, that is, the frictional engagement with the moving slit band plate 2. Endless band 3 that circulates in
The pressure bonding plates 9 and 12 which press the inner surface 3a of This creates tension.

This invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the spirit of this invention. For example, in the above embodiment, the endless band 3 disposed on the upper side
Although the explanation has been made with a configuration in which the inside of the body is pressed by the pressing body 5,
The pressure applying body 4 may be used instead of the pressing body 5, and the pressure applying body 4 and the pressing body 5 disposed on the lower and upper sides may be reversed, that is, the pressing body 5 may be placed on the lower side. A pressure applying body 4 may be provided on the upper side.

[Effect of idea]

As is clear from the above description, according to the strip tension applying device according to this invention, pressure can be applied evenly to all of the slit strips by simply increasing the fluid pressure of the expansion/contraction body. It is possible to eliminate the need for a cylinder mechanism that is inconvenient for band replacement work. Since this cylinder mechanism is unnecessary and its structure is simpler than that of the conventional one, it is possible to create a structure in which the endless band, which is held so as to be able to circulate up and down, can be supported in a manner that allows it to be freely moved upwardly. Become.

As a result, when replacing the endless belt,
The endless band held around the pressure applying body or pressing body can be easily replaced by simply tilting upward the pressure applying body or the pressing body, in which the endless band is held in a freely circulating manner. This is an extremely effective method that eliminates the need for heavy labor such as removing and installing a heavy cylinder mechanism, which is required in the case of a conventional cylinder mechanism, and allows the replacement of the endless band to be performed simply and easily. This has practical beneficial effects.

[Brief explanation of drawings]

The drawings show an embodiment of the strip tensioning device according to the invention, in which FIG. 1 is a front view of the strip tensioning device, FIG. 2 is a side view of the strip tensioning device, and FIG. 3 is a side view of the strip tensioning device. FIG. 4 is an enlarged side view of a main part of the strip tension applying device, and FIG. 4 is a side view of the strip tension applying device when parts are replaced. Explanation of symbols, 1: Band tensioning device, 2: Slit strip, 3: Endless band, 3a: Inner surface, 3
b: outer surface, 4: pressure applying body, 5: pressing body,
6: pulley, 7: rotating shaft, 7a: bearing, 8: rotating shaft, 8a: bearing, 9: pressure bonding plate, 9a: roller device, 9b: cooling groove, 10: expansion and contraction body, 11: holding body, 12: Pressure plate, 12a: Roller device, 12
b: cooling groove, 13: holding body, 13a: hole, 14:
Fixed stand, 14a: recess, 14b: side wall surface, 14
c: hole, 14d: lock rod, 15: base, 15
a: recess, 16: support column, 16a: pivot shaft, 16
b: Pivot shaft, 17: Bolt, 18: Drive device, 1
9: Drive device, 20: Substrate.

Claims (1)

[Scope of utility model registration request] A plurality of endless bands, which are held so as to be able to circulate freely, are arranged in the horizontal direction and are arranged vertically facing each other, and a slit band plate is passed between the opposing outer surfaces of the upper and lower endless bands. A crimping plate placed on the inner surface side of the endless band presses and crimps the endless band from above and below, and each endless band is driven by frictional engagement with each moving slit band plate. In a strip tensioning device that independently circulates each endless strip as a unit to generate tension in the slit strip by frictional force caused by sliding between the crimp plate and the inner surface of the endless strip, An expanding and contracting body is provided that presses at least one of the pressure-bonding plates arranged above and below against the inner surface of the endless band using fluid pressure, and the endless band that is held so as to be able to circulate up and down can be moved up and down. A belt tensioning device characterized by being supported by.