JPH07115778B2 - Roll holder for web winding roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] In the present invention, the chuck claw on the overhanging end side (web winding roll loading side) and the chuck claw on the base end side (shaft supporting side) are center references. The present invention relates to a roll holder for a web winding roll, which can be freely adjusted and the chuck claw on the protruding end side can be undulated.

[Prior Art] Conventionally, as a roll holder for a web winding roll having such a function, there is JP-A-62-167919. The Japanese Patent Laid-Open
In the roll holder for the web winding roll according to No. 62-167919, when the width of the web winding roll is small, the shaft greatly extends from the side surface of the web winding roll, which is an obstacle to machine operation.

[Problems to be Solved by the Invention] The present invention, apart from JP-A-62-167919, has almost the same function, that is, a chuck claw on the protruding end side (web winding roll loading side). And the chuck claws on the base end side (shaft support side) can be freely adjusted on the basis of the center, and even if the width of the web winding roll is large or small, the positioning chuck can be positioned so that the center of the width is at a fixed position. , The chuck claw on the overhanging end can be raised and lowered, making it extremely easy to load and unload the web winding roll. Furthermore, it is possible to adjust the length of the holder according to the width of the web winding roll. It is an object of the present invention to provide a roll holder for a web winding roll that secures the above.

Further, in addition to the above-mentioned function, the present invention can change the axial length in accordance with the width of the web winding roll, and when the width of the web winding roll is small, the overhang of the shaft is small, and the overhang of the shaft is large. It is an object of the present invention to provide a roll holder for a web winding roll, which is prevented from becoming an obstacle.

[Means for Solving the Problems] As shown in FIGS. 1 and 2, a roll holder for a web winding roll according to the present invention has a tubular shaft 1 horizontally rotatably attached to a machine frame.
A first hollow shaft 2 having a base end housed in the cylinder shaft 1 and integrally rotated with the cylinder shaft 1, and a head block 3 fixed to a projecting end of the first hollow shaft 2. The slits 4a that are long in the axial direction are formed in the cylindrical material in a circumferentially equidistant manner, so that the cylindrical end portions 4b and 4c at both ends and the connection / guide portion 4d that connects both the cylindrical end portions are formed. The base end cylindrical end portion 4b is accommodated in the first hollow shaft 2 so as to be slidable in the axial direction, and the coupling / guide portion 4d is guided by the guide portion 3a provided on the head block 3. A second hollow shaft 4 that is passed through and integrally rotates with the first hollow shaft 2, and a first bearing member 5 fixed to the base end of the second hollow shaft 4.
A second bearing member 6 fitted and fixed to the projecting end of the second hollow shaft 4, and first and second bearing members housed in the second hollow shaft 4.
Both ends are supported by 5, 6 and are rotatably driven by a handle at the projecting end or by a motor fixed to the second bearing member 6 at the projecting end. The long threaded portion 7a formed is screwed into a female thread 3a penetratingly formed in the center of the head block 3 and is slidably engageable with a counterpart at a required length on the base end side. An operating shaft 7 having a non-circular shaft portion 7b capable of transmitting rotation, the head block 3, and the first bearing member 5 on the base end side.
And the one end is axially supported by the center of the head block 3 and the operation shaft 7 is passed inside, and the outer surface has the same pitch and twist in the same direction as the long threaded portion 7a of the operation shaft 7. A cylindrical screw shaft 8 formed with a male screw 8a, and a rotation transmitting piece 9 fixed to the free end of the cylindrical screw shaft 8 and slidably fitted on the non-circular shaft portion 7b of the operating shaft 7. A nut runner 10 screwed onto the male screw 8a of the cylindrical screw shaft 8 and three or more nut runners 10 fixed to the nut runner 10 in the same arrangement and passing through the slit 4a of the second hollow shaft 4 and further matching the slit 4a. As described above, the first hollow shaft 2 is projected to the outside through the slit 2a formed so as to be elongated in the axial direction, and the web is wound by the inclined surface 11a formed on the side surface on the projecting end side. A chuck claw 11 for centering and chucking the center hole of the mounting roll R; It is connected to the second bearing member 6 so as to face the chuck claws 11 and is sunk into the slit 4a of the second hollow shaft 4 so that it can be projected. An undulating chuck claw 12 that supports a hole and carries out a centering chuck. The undulating chuck claw 12 is composed of a first link 12a and a second link 12b that are flexibly connected to each other. 12a is connected to the second bearing member 6, and a second link 12b is connected to a ring block 12c housed between the head block 3 and the second bearing member 6,
A resistance rod 12 through which the ring block 12c is passed through a small hole 3b formed in the head block 3 so as to generate frictional resistance.
It is characterized by being fixed to d.

It should be noted that the "base end side" always corresponds to the base end side of the roll holder for any constituent element, and the "overhang side" always corresponds to the protruding side of the roll holder for any constituent element. It is assumed that

[Operation] In order to load the web winding roll, the operation shaft 7 is rotated so as to extend toward the projecting end side. Then, the first link 12a constituting the undulating chuck claw 12 is pulled by the second bearing member 6 and moves to the projecting end side, while the friction resistance of the resistance rod 12d holds the ring block 12c. Receive power. For this reason, the first link 12a and the second link 12b can be bent by extending the bending of the first link 12a and the second link 12b as shown in FIG. The slit 4a is in a retracted state and can pass the web winding roll R.

On the other hand, when the operation shaft 7 is rotated so as to extend toward the projecting end side as described above, the cylindrical screw shaft 8 also rotates in the same direction. In this case, since the long screw portion 7a and the male screw 8a have the same pitch and twist in the same direction, the non-rotatable chuck claw 11 moves toward the base end side by the rotation of the tubular screw shaft 8. That is, when the operation shaft 7 is rotated so as to extend to the overhanging end side, the undulating chuck claws 12 sink into the slits 4a and move to the overhanging end side, and the chuck claws 11 move to the undulating chuck claws 12 as well. Move to the base end by the same amount.

After loading the web winding roll R, the web winding roll R is placed on the head block 3 and the operation shaft 7 is rotated in a direction in which the operation shaft 7 is pulled toward the base end side. Then, also at this time, the first link 12a constituting the undulating chuck claw 12 is pushed by the second bearing member 6 and moves toward the base end side, while the ring block 12c is moved by the frictional resistance force generated in the resistance rod 12d. Trying to be blocked from moving. Therefore, the first link 12a and the second link 12b are
As shown in FIG. 1, it bends and floats from the slit 4a so that it can be chucked. When the operating shaft 7 is continuously rotated, the web winding roll R is approached.

On the other hand, when the operating shaft 7 is rotated in the direction in which it is pulled toward the base end side as described above, the chuck claw 11 is lifted by the rotation of the cylindrical screw shaft 8 rotating in the same direction as the operating shaft 7.
Approaching the web winding roll R by the same movement amount as 12.

Therefore, the chuck claw 11 and the undulating chuck claw 12 approach each other on the basis of the center, and the web is wound by the inclined surface 10a of the outer surface on the opposite side of the chuck claw 11 and the inclined side portion of the second link 12b. Both ends of the roll R can be chucked in a centered state.

Furthermore, in order to remove the web winding roll R, the operation shaft 7 may be rotated so as to be pulled out to the projecting end side. Then, the undulating chuck claw 12 and the chuck claw 11 are separated from each other with the intermediate point therebetween as a reference, and the undulating chuck claw 12 is slit 4a.
Since it sinks inside, it can be removed by passing it through the web winding roll R.

The roll holder is capable of chucking the web winding roll R having a width in the range of Wmin to Wmax on the basis of the center, and when chucking the web winding roll R of Wmin,
Since the overhanging end of the roll holder does not overhang significantly, it does not become an obstacle during driving and the risk of hitting the head is avoided.

[Embodiment ... FIG. 1 and FIG. 2] First, the configuration will be described with reference to FIG.

Reference numeral 1 is a cylinder shaft, and is a fixing member 13a, 13 of the packaging machine frame.
Both ends are supported by b, and the pulley portion 1a provided on the outer surface is freely rotated by winding an endless rope 14 between the pulley 1a and an externally connected pulley of a rotation control device (brake device with adjustable braking force) not shown. Is braked, and rotation is stopped again,
The first intermediate shaft 2 is accommodated and supported inside. A base end of the first intermediate shaft 2 is housed in the cylindrical shaft 1 so as to be movable in the axial direction, and a slide key 15 fitted in a long hole 1b formed in the cylindrical shaft 1 is fixed and integrated. It is designed to be rotated.
The first hollow shaft 2 has slits 2a that are long in the axial direction and are formed in a cylindrical arrangement in the projecting portion, and the projecting end serves as a cylindrical support portion 2b that supports the head block 3.

The head block 3 is fixed so as to close the overhanging shaft of the first hollow shaft 2, and has a guide part 3a for axially guiding the connection / guide part 4d of the second hollow shaft 4 and a center part. Has a female screw 3a formed therethrough. The second hollow shaft 4
The slits 4a that are long in the axial direction are formed in the cylindrical material in a circumferentially equidistant arrangement so that the cylindrical end portions 4b and 4c at both ends and the connection / guide portion 4d that connects both the cylindrical end portions are formed. Becomes
The proximal cylindrical end portion 4b is housed in the first hollow shaft 2 in the axial sliding direction, and the coupling / guide portion 4d is guided by the guide portion 3b provided on the head block 3. The first hollow shaft 2 is passed through and integrally rotated. A bearing member 16 is fixed to the protruding end of the first hollow shaft 2, and a meandering operation shaft 17 is pivotally attached to the bearing member 16.

The meandering operation shaft 17 has a collar 17a, and the collar 17a is connected to a control actuator (not shown) so as to be pushed or pulled in the axial direction. This component is attached if necessary, and when the web of the web winding roll R is pulled into a bag making machine (not shown), when the width center of the web is slightly displaced, for example, by 2 mm from the left or right, This is detected by a displacement sensor such as a phototube switch and driven by a control actuator to push or pull the meandering operation shaft 17 in the axial direction so as to correct the displacement of the web.

Therefore, when the roll holder is used, that is, when the wrapping machine is in operation, all components including the first hollow shaft 2 are supported by the freely rotatable cylinder shaft 1, so that the web winding roll R When this web is pulled by a web transfer means (not shown), the undulating chuck claws 12 and the web winding roll R chucked by the chuck claws 11 rotate and the web is fed out. When the width center of the web slightly deviates from the center of the bag making machine to the left or right, a control actuator (not shown) is driven to push or pull the meandering operation shaft 17 so as to eliminate this slight deviation. Thereby, the meandering of the web is corrected.
Then, in order to prevent the web winding roll R from rotating rapidly and the web from being loosened and fed out, the free rotation of the freely rotatable cylinder shaft 1 is controlled by an unillustrated rotation control device via an endless rope 14. Will be.

First and second bearing members 5 and 6 are fixed to the base end and the overhanging end of the second hollow shaft 4, and the operation shaft 7 is supported at both ends.
The first bearing member 5 on the base end side supports the base end side shaft portion 7c of the operating shaft 7 via a bearing 18a, and the second bearing member 6 on the projecting end side is slightly longer than the operating shaft 7. The overhanging end side shaft portion 7d is supported via a bearing 18b. The operating shaft 7 is rotatably driven by turning a handle 19 fixed to the projecting end. The operation shaft 7 is formed with a long thread portion 7a having a required length in the middle thereof, and the long thread portion 7a is screwed into a female screw 3a penetratingly formed in the center of the head block 3. Further, a non-circular shaft portion 7b capable of slidably engaging with the other party and transmitting rotation is formed in a required length on the base end side. Non-circular shank of this embodiment
7b is a square shaft, but it may be a spline shaft or a shaft to which a key is fixed. The handle 19 is movably attached to a head plate 21 which is fitted to the operation shaft 7 and fixed by a bolt 20, and is raised when the operation shaft 7 is rotated when loading or unloading the web winding roll R. And the head plate for other purposes.
It is supposed to be put down on the front side of 21.

The second bearing member 6 and the head plate 21 are fixed to each other by bolts (not shown), and have an outer diameter that tapers toward the end surface of the head plate 21 so that the web winding roll R can be easily passed therethrough. It has been reduced in diameter.

The head block 3 and the first bearing member 5 on the base end side
There is a cylindrical screw shaft 8 which is housed between and and whose one end is axially supported by the center of the head block 3. The cylindrical screw shaft 8 has an operating shaft 7 passed through a central hole thereof, and an external thread 8a having the same pitch and twist in the same direction as the long threaded portion 7a of the operating shaft 7 is formed on the outer surface thereof. The tubular screw shaft 8 is
Since the rotation transmitting piece 9 fixed to the free end guides the non-circular shaft portion 7b of the operating shaft 7 in the axial direction, it is substantially supported at both ends and is rotated integrally with the rotation of the operating shaft 7. It has become. Further, in the tubular screw shaft 8, a nut runner 10 is screwed onto a male screw 8a, and a chuck claw 11 is attached to the nut runner 10. The chuck claws 11 are fixed to three or more in the circumferential direction at equal intervals, pass through the slits 4a of the second hollow shaft 4, and further have slits 2a formed in the first hollow shaft 2 so as to coincide with the slits 4a. It projects through to the outside, and the center hole of the web winding roll R is centered and chucked by the inclined surface 11a formed on the outer surface of the overhanging end side.

The second bearing member 6 has the same outer diameter as the head block 3 and is formed in a cap shape so as to come close to the head block 3 when the operation shaft 7 is most retracted. The roll R can be placed on the head block 3 and the second bearing member 6.

Between the head block 3 inside the second hollow shaft 4 and the second bearing member 6, the slit of the second hollow shaft 4 is drawn when the operation shaft 7 is retracted in association with the rotation of the operation shaft 7. An undulating chuck claw 12 is provided which protrudes from 4a and can be retracted into the slit 4a when the operating shaft 7 is extended.

The undulating chuck claws 12 are connected to the second bearing member 6 so as to face each of the chuck claws 11 and can sink into the slit 4a of the second hollow shaft 4 and project therefrom. The centering chuck is supported by supporting the center hole of the web winding roll R at the time of protrusion.

The undulating chuck claw 12 is composed of a first link 12a and a second link 12b that are flexibly connected, and each chuck claw 11
The first link 12a is connected to the second re-bearing member 6 and the second link 12b is housed between the head block 3 and the second bearing member 6. It is connected to a ring block 12c, and the ring block 12c is fixed to a resistance rod 12d which is passed through a small hole 3c formed in the head block 3 so as to generate frictional resistance.

The first link 12a is connected to the second bearing member 6 by connecting the first link 12a to the slit 6a formed in the second bearing member 6 so as to correspond to the slit 4a of the second hollow shaft 4. It is housed and connected by a pin 12e. Also the first link 12a
The second link 12b and the second link 12b are connected to each other by forming the second link 12b into a fork shape, and inserting the first link 12a into the second link 12b and connecting the second link 12b with the pin 12f. Second link 12b
The second link 12b is formed in a fork shape, and the rib extended from the ring block 12c is inserted into the second link 12b and connected by the pin 12g.
The ring block 12c is slidably fitted in the second hollow shaft 4 and has a guide pin 12h driven therein which engages with the slit 4a of the second hollow shaft 4, and the second hollow shaft 4c. It cannot rotate relative to 4.

The resistance rod 12d is inserted through the small hole 3c so that the O-ring 12i housed in the hood block 3 is slightly tightly fitted, and friction resistance is generated when the O-ring 12i is pulled in the axial direction. .

Therefore, when the operation shaft 7 is rotated so as to extend toward the projecting end side, the first link 12a is pulled by the second bearing member 6, while the second link 12b is caused by the friction resistance of the resistance rod 12d. Since it receives a force to be stopped, it is in a state of being retracted from the slit 4a as shown in FIG. 2, and the undulating chuck claws 12 are closed only by rotating the operating shaft 7 by a small number of rotations, and the web winding roll R can be replaced quickly.

Further, when the operation shaft 7 is rotated so as to be pulled in toward the base end side,
While the first link 12a is pushed by the second bearing member 6,
Since the second link 12b receives a force whose movement is blocked by the frictional resistance of the resistance rod 12d, as shown in FIG. 1, the first link 12a and the second link 12b are bent and protruded from the slit 4a. When the operation shaft 7 is rotated, the web winding roll R can be chucked in the centered state by the inclined side portion of the second link 12b.

[Modifications Included in the Claims of the Present Invention] The handle 19 may be of a box wrench type and directly attachable to and detachable from the operation shaft 7.

Instead of the handle 19, a forward / reverse rotatable torque motor is fixedly installed on the second bearing member 6 at the projecting end and directly connected to the operation shaft 7, and the motor wiring is passed through the operation shaft 7 in a hollow manner. The operation shaft 7 may be rotationally driven by the torque motor by connecting the base end of the operation shaft 7 to a power feeding brush provided on the outer surface of the cylindrical shaft 1.

[Advantages of the Invention] As described above, according to the roll holder for a web winding roll of the present invention, the chuck on the web winding roll replacement side is the undulating chuck claw and the undulating chuck claw and the chuck claw. Can adjust the interval freely based on the center, and even if the width of the web winding roll is large or small, both ends can be chucked in a centered state so that the center of the roll width is at a fixed position, so that the width from Wmin to Wmax. The web winding rolls in the range can be chucked at both ends in a centered state based on the center.

Further, according to the roll holder for a web winding roll of the present invention, the holder axial length can be changed according to the width of the web winding roll, and therefore, when chucking the web winding roll of Wmin, the roll Since the overhanging end of the holder does not overhang greatly, it does not become an obstacle during driving and the risk of hitting the head is avoided.

Furthermore, according to the roll holder for a web winding roll of the present invention, since the undulating chuck claws are depressed into the slit and protruded from the slit immediately when the operation shaft starts rotating, the web winding roll is It can be removed by rotating the operating shaft at a small number of revolutions, so that the web winding roll can be replaced quickly.

[Brief description of drawings]

The drawings relate to an embodiment of a roll holder for a web winding roll of the present invention, FIG. 1 is a vertical sectional view showing a chuck state, and FIG. 2 is a vertical sectional view showing a state when a web winding roll is replaced. Is. 1 ... cylindrical shaft, 2 ... first hollow shaft, 3 ... head block, 3a ... guide part, 4 ... second hollow shaft, 4a ... slit, 4b, 4c ... cylindrical end part , 4d ... Connection and guide part, 5 ... First bearing member, 6 ... Second bearing member, 7 ... Operating shaft, 7a ... Screw part, 7b ... Non-circular shaft part, 8 ... Cylindrical screw shaft, 8a… Male screw, 9 …… Rotation transmission piece, 10 …… Nut runner, 11 …… Chuck claw, 11a …… Inclined surface, 12 …… Elevating chuck claw, 12a …… Inclined surface, R… ... Web winding roll,

Claims (1)

[Claims] 1. A cylinder shaft horizontally rotatably attached to a machine frame, a first hollow shaft having a base end housed in the cylinder shaft and integrally rotated with the cylinder shaft, and a first hollow shaft. The head block fixed to the overhanging end of the cylindrical block and the cylindrical material with axially long slits arranged in the circumferential direction to connect the cylindrical ends at both ends and the two cylindrical ends. And a guide portion, the base end cylindrical end portion is accommodated in the first hollow shaft so as to be slidable in the axial direction, and the coupling and guide portion is guided by the guide portion provided on the head block. Second hollow shaft that is integrally passed through the first hollow shaft, the first bearing member fixed to the base end of the second hollow shaft, and the tension of the second hollow shaft. A second bearing member fitted and fixed to the outgoing end, and first and second bearing members housed in the second hollow shaft. Both ends are supported and are rotationally driven by a handle at the overhanging end or by a motor fixed to the second bearing member at the overhanging end. A non-circular shaft having a threaded portion screwed into an internal thread formed through the center of the head block and slidably engageable with a counterpart at a required length on the base end side and capable of transmitting rotation. An operation shaft having a portion formed therein, and is housed between the head block and the first bearing member on the base end side, one end of which is rotatably supported at the center of the head block, and the operation shaft is passed inside to the outer surface. A cylindrical threaded shaft having a male thread formed therein having the same pitch and twist in the same direction as the long threaded part of the operating shaft, and a non-circular shaft part of the operating shaft fixed to the free end of the cylindrical screw shaft. Transmission that is slidably fitted to the A piece, a nut runner screwed to the male thread of the tubular screw shaft, and three or more fixedly mounted on the nut runner in the same arrangement so as to pass through the slit of the second hollow shaft and further coincide with the slit. The first hollow shaft is projected to the outside through a slit opened so as to be elongated in the axial direction, and the center hole of the web winding roll is centered by the inclined surface formed on the side surface on the protruding end side. The chuck claws to be chucked and the second bearing member are connected so as to face the chuck claws, and are sunk into the slits of the second hollow shaft so that they can be projected. An undulating chuck claw that supports the center hole of the roll and performs a centering chuck, and the undulating chuck claw includes a first link and a second link that are flexibly connected to each other. Is connected to the second bearing member, the second link is connected to a ring block housed between the head block and the second bearing member, and the ring block is drilled in the head block. A roll holder for a web winding roll, wherein the roll holder is fixed to a resistance rod which is passed through the small hole so as to generate frictional resistance.