JP3020100U - Paper tube manufacturing equipment - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Match the forward speed of the cutting core and cutter table with various axial growth speeds of a paper tube that is obliquely wound on a static shaft and grows. Cut the rear end of the inner paper tube with a cutter,
A paper tube whose cut end is not deformed is obtained, and the installation space is shortened by shortening the length of the cutting core shaft and the cutter base. [Structure] A paper tape, which is stretched between a pair of pulleys 8 and obliquely intersects a static shaft 11 and is wound once to endlessly wind a drive tape 12 which is obliquely supplied onto the static shaft. In a paper tube manufacturing apparatus for growing a paper tube while winding, a short cutting core shaft 26 is extendedly connected to the front end of a rotary spindle 13 penetrating a static shaft, and a short cutter table 28 is provided at the front end in parallel with the rotary spindle. The rear end of the connected sliding rod and the rear end of the rotary spindle are connected by the connecting body 15, and the ball screw shaft 23 driven by the servomotor with encoder 24 is screwed into the connecting body, and the By rotating the ball screw shaft, the connecting body, the cutting core shaft, and the cutter base are advanced at the same speed as the axial growth speed of the paper tube, and the rear end of the paper tube of a predetermined length is cut by the cutter on the cutter base during the advance. Disconnect.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In this invention, an endless winding drive belt stretched between a pair of pulleys and obliquely wound once around a static shaft is used to obliquely wind a paper tape that is obliquely supplied onto the stationary shaft. The present invention relates to a paper tube manufacturing apparatus for growing a paper tube and cutting the paper tube into a predetermined length.

[0002]

[Prior art]

 Such a paper tube manufacturing apparatus is proposed by the present applicant in Japanese Patent Publication No. 52-17568, Japanese Patent Publication No. 53-529, Japanese Patent Publication No. 53-2208, Japanese Utility Model Publication No. 54-24524, and Japanese Utility Model Publication No. It is publicly known from JP 61-3617, JP-B 61-41731, and the like. These paper tube manufacturing machines are stretched between a hollow static shaft supported horizontally by a cantilever at the rear end of the machine and a pair of pulleys supported by the machine to intersect the static axis at an angle. An endless winding drive belt that is obliquely wound once around the outer circumference, a rotary spindle that penetrates the static shaft and is slidable in the front-rear direction, and an extension shape that extends from the free end of the static shaft to the front end of the rotary spindle. Equipped with a cutting core shaft that is connected and rotates and slides integrally with the rotary spindle, and a cutter that supports the cutting core shaft from below and that comes in contact with and separates from the shaft, and is supported slidably in the longitudinal direction by the machine body. A slide rod that is supported by the machine body in parallel with the cutter base, the cutting shaft, and the rotary spindle, and that can slide in the front-back direction by connecting the cutter base to the front end, and the rear end of the slide rod and the rotary spindle. It is equipped with a connecting body that connects the departments together, and the overlapping part of the paper tape is glued. A paper tube that is threaded on the static axis is threaded on the cutting core axis from the free end of the static axis, and the paper tube is cut to a predetermined length from directly above by the cutter mounted on the cutting table on the cutting axis. I am doing it. For this reason, the lower end of the rocking arm is pivotally attached to the base of the aircraft, and the upper end of the rocking arm that swings in the front-back direction by a crank is connected to the cutter base to move the cutter base forward and backward, and to move the cutter base forward and backward. It transmits to the cutting core shaft through the sliding rod, connecting body, and rotary spindle, and moves the cutting core shaft forward and backward in synchronization with the cutter base.

As described above, since the cutter base and the cutting core shaft advance and retreat at an angular velocity based on the longitudinal swing of the upper end of the swing arm with the lower end as a fulcrum, the speed during forward and backward movement is not constant. . Therefore, the length of the cutting core shaft is made slightly longer than the cutting length of the paper core, and the cutters are installed at the front end and the rear end of the cutter base so that the rocking arm can move upward while the cutter base and the cutting core shaft are moving forward. The angular velocity when passing through the dead point from the back to the front is made to approximately match the axial growth velocity of the paper tube that grows while screwing, and at that time, the cutter at the front end on the cutter table and the rear Simultaneously actuate the cutters at the ends to slightly cut off the front end of the paper tube to form a paper tube of a specified length, and push this paper tube from the front end of the cutting core shaft at the front end of the succeeding paper tube.

[0004]

[Problems to be solved by the device]

 Therefore, for example, when manufacturing a paper tube having a length of 2 m, a cutting core shaft having a length of 2.3 m is connected to the front end of the rotary spindle, the cutter base is also made to have a length of 2.3 m, and the front and rear ends thereof have a length of 2 m. Two cutters must be installed at the front and rear at intervals of. And in order to remove the paper tube cut to a length of 2 m on the cutting core shaft from the cutting core shaft, it is necessary to maintain a space of 2 m or more in front of the cutting core shaft, so it is very long to install in the front-back direction. Needs space.

Further, if the front end of the paper tube to be discarded is clogged with the front end of the cutting core shaft for some reason, the cut regular-size paper tube is also clogged and the regular-size paper tube is grown. The growth of the succeeding paper core that you press forward also stops. As a result, the fixed-length paper tube is punctured by the forward propulsive force of the succeeding paper tube, which causes the adhesion of the overlapped part of the paper tape to shift. Also, since the growth of the succeeding paper tube in the forward direction is stopped, the adhesion of the overlapped part of the paper tape is likewise displaced by the driving force applied by the drive winding belt to cause puncture, or the belt spirals the paper tape around the outer periphery of the static axis. The pitch of winding in a circular shape may change and it may not become a paper core.

Further, when the width of the paper tape to be wound around the static axis at an angle and being screwed while adhering the overlapping portion to form a paper tube is changed, the oblique angle at which the winding drive belt intersects the static axis is set. It is necessary to change to the required angle. Furthermore, when changing the static axes with different diameters to manufacture paper tubes with different diameters, it is necessary to change the angle at which the winding drive belt intersects the static axis to the required angle depending on the width of the paper tape used. is there. In either case, the axial growth rate of the paper tube that grows while screwing changes. In the conventional device, when the rocking arm passes through the top dead center from front to back, the two front and rear cutters on the cutter base are actuated to cut the paper core during growth while the cutter base and the cutting core advance. However, as described above, when the growth velocity in the axial direction of the paper tube varies, the angular velocity at which the rocking arm passes from the top dead center to the front side is changed to the various growth rates in the axial direction of the paper tube. It is difficult to match the speed, and requires skilled skills.

[0007] Since the angular velocity of the swinging arm passing from the top dead center to the front after the dead center is adjusted to be similar to the growth velocity in the axial direction of the paper tube, the cutting core axis at that time and the forward movement of the cutter table are advanced. The velocity does not exactly match the axial growth velocity of the paper tube. Therefore, when the cutter of the cutter stand cuts into the paper tube to cut the paper tube, the cutter slightly deforms the paper tube cut due to the effect of the speed difference, so that the paper tube cut becomes unsightly.

[0008]

[Means for Solving the Problems]

 The present invention was developed in order to solve the problems of the above-mentioned prior proposals, and includes a hollow static shaft horizontally supported by a cantilever on the rear end of the body and a pair supported by the body. An endless winding drive belt that is stretched between pulleys and intersects the static axis at an angle, and is wound around the outer circumference diagonally once, and a rotary spindle that penetrates the static axis and can slide in the front-back direction. In a paper tube manufacturing apparatus equipped with a sliding rod that is supported by the machine body parallel to the rotating spindle and is slidable in the front-back direction, and a connecting body that connects the sliding rod and the rear end portion of the rotating spindle, A ball screw shaft, which is parallel to the static shaft and is engaged with the connecting body by a screw, and a servomotor with an encoder capable of rotating and driving the screw shaft, which is capable of forward and reverse rotation, are provided in the machine body, and a rotary spindle protruding from the free end of the static shaft. At the front end of the The cutting core shaft with a short growing length is connected in an extended form, and the cutting core shaft is supported from below on the front end of the sliding rod, and one cutter that comes in contact with and separates from the cutting core shaft is mounted. A cutter base is connected, and a sensor that detects the front end of the paper core that grows forward beyond the front end of the cutting core shaft is arranged beside the extension line of the cutting core shaft. By starting the servomotor with encoder and rotating the ball screw shaft to advance the connected body, the cutting core shaft and the cutter base are moved forward at the same speed as the axial growth speed of the paper tube. It is characterized in that the cutter of the cutter table cuts the rear end of the paper tube of a predetermined length. In order to enable the manufacture of paper tubes of various lengths, a plurality of sensors for detecting the front end of the paper tube are arranged along the extension line of the cutting core axis at intervals in the front-rear direction. The sensor to be used may be selected from a plurality of sensors depending on the length of the paper core to be manufactured, or one sensor for detecting the front end of the paper core may be placed beside the extension line of the cutting core shaft. It is possible to move along the guide rail provided so as to be adjustable, and to fix it by adjusting the mounting position of the sensor with respect to the guide rail according to the length of the paper core to be manufactured. Further, a sensor for detecting the front end of the paper tube and a servomotor with an encoder may be connected via an adjustable timer.

[0009]

【Example】

 In each of the embodiments shown in the drawings, 11 is a hollow static shaft horizontally supported by the machine body 1 with its rear end being cantilevered, and 12 is stretched between a pair of pulleys supported by the machine body so as to be oblique to the static shaft. The endless winding drive belt has a drive band wound once around its outer circumference, 13 is a rotary spindle that penetrates the static axis and is slidable in the longitudinal direction, and 14 is supported by the machine body in parallel with the rotary spindle. A sliding rod slidable in the front-rear direction, 15 denotes a connecting body that connects the sliding rod and the rear end of the rotary spindle, and these are known members described in the above-mentioned prior proposal. .

The machine body 1 includes a base fixed on the floor, a headstock 2 erected on the rear end of the base, and a fixed table 3 which is lower in height than the headstock and is installed in front of the headstock 2. Consists of. A short detachable cylinder 16 that detachably supports the stationary shaft 11 is provided on the upper front surface of the headstock, and the stationary shaft is horizontally supported by a cantilever whose rear end is fixed to the removable shaft. The detachable cylinder 16 is for fixing and using a static shaft having a diameter corresponding to each diameter of the paper tube to be manufactured.

On the table 3, two arms 5 and 7 diagonally traversing the lower part of the static axis are pivotally mounted in an X shape at a fulcrum 0 deviating from the perpendicular of the center line of the static axis, and both ends of the arm 5 are attached. A pair of pulleys 6 and 6 ', and a pair of pulleys 8 and 8'at both ends of the arm 7 so as to be rotatable, respectively, between the pair of pulleys 6 and 6'and 8 and 8'. The endless winding drive belts 12-I and 12-II, which are wound obliquely once around the outer circumference of the static shaft, are stretched in the middle of the drive band. One of the paired pulleys 6, 8 is driven to rotate by a motor M1, a speed reducer, and a pulley whose rotation is transmitted via a fulcrum 0, whereby the winding drive belts 12-I and 12-II circulate, and The winding portions 17-I and 17-II of the drive band, which are wound around the outer circumference obliquely once, are slip-rotated obliquely on the outer circumference of the static axis. The winding directions of the winding portion 17-I and the winding portion 17-II with respect to the static axis are opposite to each other, and the winding driving belt 12-II stretched between the pulleys 8 and 8'is provided on the rear side of the winding driving belt 12-II. When, for example, two tapes having the same width coated with an adhesive are supplied to the winding part 17-II so that one half of the width is overlapped, both tapes are applied to the outer circumference of the static axis by the winding part 17-II. It is drawn in and wound in a spiral shape, and the other half of the width is overlapped and adhered while advancing while rotating spirally toward the free end of the static axis (screw advance), and then the pulleys 6, 6 ' By the winding portion 17-I on the front side of the winding drive belt 12-I stretched between them, the winding drive belt 12-I is screwed around the static axis again while being screwed, and passes through the winding portion 17-I. It grows as a paper tube while rotating spirally toward the free end of the static axis.

The winding drive belts 12-I and 12-II are obliquely attached to the static axis according to the change of the width of the tape or the change of the static axis corresponding to the diameter for manufacturing the paper tubes having different diameters. In order to adjust the winding angle for winding, the table 3 holds the intermediate portion of the turnbuckle shaft 4 in the front-rear direction, which can be rotated by the handle, while allowing free rotation of the arms 5 and 7. The nuts 5'and 7'are attached to the ends having the pulleys 6'and 8'to be movable in the longitudinal direction of the arm and swingably. The front part of the turnbuckle shaft is the nut 5'and the rear part is the nut 7 '. Thread into ´. Therefore, the handle 4'rotates the turnbuckle shaft in the forward and reverse directions to rotate the arms 5 and 7 about the fulcrum 0, and the angle at which the winding portions 17-I and 17-II of the winding drive belt are wound around the static shaft. Can be adjusted to large or small. The idle pulleys 6'and 8'of each arm are erected on a slide base that is slidable in the longitudinal direction of the arm, and each slide base is pressed toward the end to drive the winding operation. The belts 12-I and 12-II can be applied with a required tension.

A bearing cylinder 18 is provided on the rear wall of the headstock so as to face the front removable cylinder 16, and a rotary cylinder 19 having internal teeth for transmitting rotation to the rotary spindle 13 is rotatably held in the cylinder. The rotary cylinder 19 is rotated at its front end projecting from the front end of the bearing cylinder 18 by being driven by a motor M2, a speed reducer, and a pulley.

Reference numeral 20 denotes a spline shaft that is detachably connected to the rear portion of the rotary spindle 13 that extends through the stationary shaft 11 and extends rearward so as to rotate integrally with the rotary spindle 13. The spline shaft 20 engages the spline on the outer periphery with the inner teeth of the rotary cylinder 19 and projects rearward from the rear end of the cylinder 19. A rear-facing shelf 21 is provided on the rear wall of the headstock below the spline shaft 20, and a connecting body 15 is slidably mounted on the shelf along a guide 22 in the front-rear direction. The rear end of the shaft 20 is rotatably connected to the connecting body. Further, the rear end of the sliding rod 14 which is slidably supported by penetrating the headstock in the front-rear direction immediately below the rotary spindle is connected to this connecting body. Therefore, the rotary spindle 13 and the spline shaft 20 and the sliding rod 14 slide forward and backward integrally with each other due to the forward and backward sliding of the connecting body 15.

Reference numeral 23 is a ball screw shaft which is parallel to the static axis and which is screwed through the connecting body 15 in the front-rear direction, and 24 is a servomotor with an encoder capable of rotating the ball screw shaft in a forward and reverse direction. The rear end of the ball screw shaft and the servomotor are supported by a rear support piece 25 standing on the rear end of the shelf 21, and the front end of the ball screw shaft is supported by the rear wall of the headstock. When the servomotor 24 rotates in the forward direction to drive the ball screw shaft 23 to rotate, the connecting body 15 screw-engaged with the screw shaft grows on the static shaft while spirally rotating toward the free end of the static shaft. When the servomotor reverses and drives the ball screw shaft to rotate at the same speed as the growth speed of the paper tube, the connected body moves backward and backward at the same speed as the forward speed. As the connecting body advances and retracts, the rotary spindle 13, the spline shaft 20, and the sliding rod 14 advance and retract integrally. Even when the connecting body 15 is at the most retracted position on the shelf, the front end of the rotary spindle 13 slightly projects forward from the front end of the stationary shaft 11.

A short cutting core shaft 26 is extendedly connected to the front end of the rotary spindle. With a conventional paper tube manufacturing machine, when manufacturing a paper tube with a length of 2 m, a cutting core shaft with a length of 2.3 m and a length of 1. When manufacturing a 5 m paper tube, it was necessary to connect a 1.8 m long cutting core shaft, but in this invention, the length of the cutting core shaft is constant regardless of the length of the paper tube to be manufactured. When the stroke amount of the connecting body 15 which moves forward and backward by the servo motor 24 for normal and reverse rotation and the ball screw shaft 23 is 300 mm, it may be about 500 mm, which is a little longer than that.

A cutter table 28 is supported on the front end of the table 3 and is supported by a guide 27 so as to be slidable in the front-rear direction on the front end of the sliding rod 14. The cutter base 28 contacts the cutting core shaft from above at a position where a pair of rotatable support rollers 29, 29 supporting the cutting core shaft by circumscribing the cutting core shaft from below are supported and the supporting rollers 29, 29. A cutter 30 for cutting the paper tube into slices and a cutter operating device 34 are provided.

In the conventional paper tube making machine, when producing a paper tube having a length of 2 m like the cutting core shaft, the cutter base needs to have a length of 2.3 m in the front-rear direction. Then, regardless of the length of the paper tube to be manufactured, it may be about 150 mm.

As shown in FIGS. 6 to 8, the cutter 30 has a holder 32 composed of two arms pivotally attached and fixed in an X-shape in this embodiment, and a rotary lower end of both arms of the holder. It consists of two round blades 31, 31 attached and a turnbuckle 33 connecting the upper ends of both arms. Each time the round blade becomes less sharp, it is polished to make it sharper. This will gradually reduce the diameter of the round blade, in which case the turnbuckle will be rotated to increase the distance between the upper ends of both arms of the holder, thereby reducing the distance between the lower edges of both arms of the holder. When the holders 31 and 31 are brought close to each other and the holder is lowered by a predetermined distance, the holder is circumscribed to the cutting core shaft to cut the paper tube (see FIG. 6B).

In this embodiment, the cutter actuating device 34 has an intermediate part pivotally attached to an upper end of a supporting column 28 ′ standing from a cutter base at a fulcrum 35 ′, one end of which is located above a pair of rollers 29, 29, and the other. The cylinder end is pivotally attached to the tip of a V-shaped swing arm 35 whose end projects horizontally outward from the side of the cutter base, and the tip of a bracket 36 which projects outward from the side of the cutter base, and the piston end is oscillated as described above. An air cylinder 37 pivotally attached to the other end of the moving arm, a roller 38 pivotally attached to the other end of the swing arm, and a column 39 standing upright on the front of the bed 3 of the machine body in the front-back direction. The front end of the paper tube, which is attached to the cam follower 40 with which the roller 38 comes into contact with the bottom and the extension table 9 connected to the front end of the table 3 in a forward direction, grows while being screwed beyond the front end of the cutting shaft. Photoelectric sensor 41 for detecting Consisting of. On the extension table 9, there is provided a pair of rollers 10 and 10 long in the front-rear direction for supporting the paper tube by circumscribing the paper tube from below from a growing paper tube while screwing over the front end of the cutting core shaft. The photoelectric sensor 41 is installed near the roller.

In order to attach the holder 32 of the cutter 30 to the swing arm 35, as shown in FIG. 7, a bearing tube portion 42 is provided at one end of the arm 35, a flange 44 is provided, and two holders at the front end are provided. The rear half of the holder mounting shaft 43, to which the X-shaped pivot portion of the arm is fastened and fixed by the nut 45, penetrates through the bearing tubular portion 42 and is rotatably held, and the front of the bearing portion and the collar 44 are The coil spring 46 in a neutral state is fitted to the holder mounting shaft between them, and the front and rear ends of the bar are bent in the axial direction. The front bent portion 46a of the spring is on the collar 44, and the rear bent portion 46b is on the bearing tubular portion 42. Insert and fix, and keep the blade mounting shafts 31 ', 31' at the lower ends of the two arms of the holder on the same horizontal line. As described above, when adjusting the distance between the lower ends of both arms of the holder with the turnbuckle 33, the nut 45 is loosened.

As described above, when the holder is rotatably attached to the swing arm via the neutral coil spring 46, both round blades 31, 31 are lowered to cut both sides of the paper tube from above. If the diameter of one round blade is smaller than the other due to polishing, etc., the one with the larger diameter comes into contact with the paper tube first, as shown in FIG. 6 (C). The holder is rotated in the clockwise or counterclockwise direction against the coil spring 46, and the round blade with the smaller diameter also comes into contact with the paper tube. Disconnect. When both round blades are pulled up after cutting, the coil spring returns to the neutral state and the holder rotates in the opposite direction to restore.

When the connecting body 15 is in the retracted position on the shelf 21, the roller 38 provided on one end of the swing arm 35 of the cutter actuator 34 contacts the rear end of the cam follower 40 from below. The air cylinder 37 pushes the roller 38 against the cam follower by the extension force.

The servomotor 24 rotates in the forward direction to drive the ball screw shaft 23 to rotate, whereby the connecting body 15, the rotary spindle 13, the cutting core shaft 26, the sliding rod 14 and the cutter base 28 start to advance integrally. After moving forward by about half the stroke amount, the roller 38 passes under the cam follower under the front uphill slope 40 'provided at the lower front end of the cam follower. As a result, the air cylinder 37 extends the piston and swings the swinging arm 35 clockwise around the fulcrum 35 'in FIG. 6, and the holder 32 having the two round blades of the cutter attached thereto descends. Then, the round blades 31, 31 come into contact with both side portions of the paper tube from above on the portion of the cutting core shaft 26 supported by the supporting rollers 29, 29 from below to cut the paper tube. In this way, both round blades contact both sides of the paper tube from above to cut the paper tube, so that the paper tube can be cut stably even if the cutting core shaft slightly swings. Since the round blades of No. 3 cut together, the service life of the round blades and the replacement period are extended.

When the cutter table 28 reaches the forward end, the rotation of the servo motor is changed to reverse rotation, and at the same time, the supply / discharge of air to the air cylinder 37 is changed, the piston is shortened, and the swing arm 35 is moved to the position shown in FIG. In (A), the cutter rises by swinging counterclockwise, and the roller 38 is positioned below the lower surface of the cam follower, so that the cutter base retreats together with the connecting body 15.

In this embodiment, as shown in FIGS. 4 and 5, the connecting body 15 is constantly stopped and stands by at a position advanced by a predetermined distance, for example, 10 mm from the retracted position. Assuming that the stroke amount of the connecting body is, for example, 300 mm, as shown in FIG. 9, the connecting body advances 290 mm by the forward rotation of the servo motor, then moves backward 300 mm by the reverse rotation of the servo motor, and then advances 10 mm by the forward rotation of the servo motor. Stop at the stop position and wait. The encoder that stores the pulse of the rotation speed of the servomotor determines and controls the forward / backward distance of the connected body and the forward / reverse rotation of the servomotor. In this way, when the connecting body 15, the cutting core shaft 26, and the cutter table 28 move forward to cut the paper tube, the connecting body moves backward and then stops at the advanced position for a predetermined distance and stands by. The cutter base and the cutting core shaft are cut off to start forward movement without backlash (allowable meshing gap) between the shaft 23 and the nut incorporated in the connecting body screw-engaged with the ball screw shaft. Variations in the length of the paper tube can be eliminated.

The forward speed and the backward speed of the connecting body 15, the cutting core shaft 26, and the cutter base 28 are determined by the ball screw shaft 23, the pitch of the screw of the nut incorporated in the connecting body screw-engaged with the shaft, and the ball. It is determined by the rotation speed (RPM) of the servo motor that drives the screw shaft. In this case, since the screw pitch is constant, the forward speed of the connecting body and the cutting core shaft 26 and the cutter base can be controlled by controlling the rotation speed of the servomotor so that the shaft of the paper tube on the static shaft or the cutting core shaft is controlled. It can be easily matched to various growth rates in the direction.

Therefore, the rotary spindle 13 and the cutting core shaft 26 rotate, and the winding drive belt 12 circulates to spirally wrap the paper tape around the stationary shaft 11 toward the free end of the stationary shaft. When the paper tube is grown as a tube, the front end of the paper tube goes over the free end of the static axis and reaches the cutting core axis 26, and further advances on the pair of rollers 10, 10 of the extension table 9, and is detected by the photoelectric sensor 41. The photoelectric sensor commands the servo motor 24 to operate. As a result, the servomotor rotates in the normal direction, the ball screw shaft 23 is rotationally driven to advance the connecting body 15 at the same speed as the axial growth speed of the paper tube, and the rotation spindle connected to the connecting body by the spline shaft 20 is disconnected. The core shaft advances integrally while rotating, and the cutter base 28 connected to the connecting body by the sliding rod 14 also advances integrally. Then, when the cutter base moves forward and the roller 38 axially mounted on the other end of the swing arm 35 moves forward below the cam follower 40 and passes by, the swing force of the air cylinder 37 swings the swing arm. The cutter 30 is lowered to cut the rear end of the paper tube on the cutting core shaft.

For example, when the connecting body and the cutter base advance 120 mm from the stop position and the cutter cuts the paper tube, as shown in FIG. 10, when manufacturing a paper tube having a length of 2 m, The photoelectric sensor 41 may be installed on the extension table 2 m in front of the cutter.

Therefore, as shown in FIG. 11, a plurality of photoelectric sensors 41a, 41b and 41c are provided near the rollers 10 and 10 on the extension table, for example, in front of the cutter at the stop position 1. It is installed at a distance of 5 m, 2.0 m, and 2.5 m, and the length can be set to 1. by making it possible to select the photoelectric sensor for instructing the servo motor 24 by the changeover switch 47. 5m, 2.0m and 2.5m paper tubes can be manufactured.

Further, as shown in FIG. 12, a guide 48 in the front-rear direction is provided beside the rollers 10, 10 on the extension table, and the photoelectric sensor 41 is attached so as to be movable along the guide. The position is adjusted to 1.5m, 2.0m, 2.5m in front of the cutter at the stop position and fixed, and the length is 1.5m, 2.0m, 2.5m with one photoelectric sensor. It is possible to manufacture a paper tube having an arbitrary length.

Further, as shown in FIG. 13, a predetermined position, for example, 1. A photoelectric sensor 41 is installed beside the rollers 10 on the 5 m extension table, and an adjustable timer 49 is connected between the photoelectric sensor and the servomotor 24. For example, the time required for the paper tube to grow by 50 cm is 3 If it is seconds, the timer is set to 0 seconds, the photoelectric sensor instructs the servo motor at 0 seconds to manufacture a paper tube of 1.5 m, and the timer is set to 3 seconds and the photoelectric sensor sends the instruction. Then, the timer delays 3 seconds and sends the command to the servo motor to manufacture a 2.0 m long paper tube, or set the timer to 6 seconds, and delay the servo sensor command to delay 6 seconds. Tell the motor, length 2. It is also possible to manufacture a 5 m paper tube.

In the illustrated embodiment, the cutter actuating device 34 comprises a rocking arm 35 having a cutter attached to one end, a roller 38 at the other end, a cam follower 40 with which the roller slides, and an air cylinder 37. However, the present invention is not limited to this, and for example, the swing arm 35 may be urged to the non-cutting position by a spring and the electromagnet may be operated to the cutting position.

Further, on one side of the rollers 10, 10 of the extension table 9, an air nozzle 50 for ejecting air toward the paper tube on the rollers 10, 10 is installed at a predetermined interval in the front-rear direction, and a cutter is installed. After cutting the paper tube with the cutter while the table is moving forward, air is ejected from each air nozzle 50 in conjunction with the cutter table when the cutter table starts moving backward, and the paper tube lying on the rollers 10, 10 is blown by the air. It is recommended that the rollers and the extension table fall down so that the paper tube that grows next can be supported on the rollers 10 and 10.

In the illustrated embodiment, two winding drive belts are used, and two arms having pulleys for tensioning the both belts attached to each end are pivotally attached in an X shape at a fulcrum 0, but that is not always the case. It is not necessary to use the V-shape even if the two arms are arranged in a C shape and pivoted at different fulcrums as shown in FIGS. 1 and 2 of Japanese Patent Publication No. 52-17568. It may be pivoted at one point. Further, the number of arms need not be two, and one arm may be used as in the conventional two-pulley type, and one winding drive belt may be used.

Further, as shown in the above-mentioned Japanese Utility Model Publication No. 61-41731, a strut is erected on the intermediate portion of the base between the cutter base and the headstock so as to be positioned behind the static shaft. An arm having a drive belt stretched around a horizontal fulcrum in a direction orthogonal to the static axis may be pivotally attached to the front surface.

[0037]

[Effect of device]

 As is clear from the above, in the present invention, the ball screw shaft, which is driven by the servomotor with an encoder capable of forward and reverse rotations, penetrates the connecting body that integrally advances and retracts the cutting core shaft and the cutter base, and engages with the screw. The servo motor rotates the ball screw shaft forward and backward to move the connecting body, the cutting core shaft, and the cutter base forward and backward.By adjusting the rotation speed of the servo motor, the connecting body, cutting core shaft, and cutter base can be adjusted. It is possible to easily match the advancing speed of the table with the axial growth speed of the paper tube that grows while being screwed on the static axis and the cutting core axis. Therefore, it is possible to easily manufacture paper tubes with the same diameter on the same static axis by using tapes with different widths, or to manufacture paper tubes with different diameters by replacing static axes with different diameters. Further, since the advance speed of the cutting core shaft and the cutter base coincides with the axial growth speed of the paper tube, the cut end of the paper tube by the cutter does not become deformed and does not become unsightly.

Furthermore, since the cutter table is provided with only one cutter that cuts the rear end of the paper tube that has grown to a predetermined length, it can be attached to a conventional cutter table that is longer than the length of the paper tube to be cut. And the length is much shorter. Similarly, the length of the cutting core shaft is longer than the length of the paper tube to be cut, and the length is much shorter than that of the conventional cutting core shaft. Therefore, the space required in front of the cutting shaft and cutter base is very short, and the installation space is shortened. At the same time, the cutter on the cutter table only cuts the rear end of the paper tube that has grown to the specified length, not the front end of the paper tube.Therefore, the front end of the discarded paper tube is clogged on the cutting core shaft. There is no room for an accident due to.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a paper tube manufacturing machine of the present invention.

FIG. 2 is an elevational view of FIG.

FIG. 3 is a perspective view of a rear portion of the machine body of FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is an elevation view in which a part of FIG. 4 is cut away.

6A is a front view of the cutter and the cutter operating device of FIG. 1, FIG. 6B is a front view when the cutter cuts the paper tube, and FIG. 6C is a front view of two round blades having different diameters. It is a front view which shows the state which cuts.

FIG. 7 is an elevation view of FIG. 6A and an enlarged sectional view of a part thereof.

FIG. 8 is a plan view of FIG.

FIG. 9 is an explanatory diagram showing that the connected body is controlled to move forward and backward by an encoder incorporated in the servo motor.

FIG. 10 is an explanatory diagram showing that the front end of the paper tube is detected by one sensor and the rear end of the paper tube is cut.

FIG. 11 shows that the front end of the paper tube is detected by a plurality of sensors having different attachment positions, and the sensor is selected to cut the rear end of the paper tube to obtain a plurality of paper tubes having different lengths. FIG.

FIG. 12 is an explanatory diagram showing that a sensor for detecting the front end of the paper tube is attached so as to be movable in the front-rear direction and a plurality of paper tubes having different lengths are obtained.

FIG. 13 is an explanatory diagram illustrating that a signal from a sensor that detects the front end of the paper tube is input to a timer to obtain a plurality of paper tubes having different lengths by the timer.

[Explanation of symbols]

 1 Airframe 2 Headstock 3 Table 4 Turnbuckle 5 Arm 6 Pulley 7 Arm 8 Pulley 9 Extension table 10 Roller 11 Static shaft 12 Winding drive belt 13 Rotating spindle 14 Sliding rod 15 Coupled body 17 Winding static belt winding Rotating part 18 Bearing cylinder 19 Rotating cylinder 20 Spline shaft 21 Shelf 22 Guide 23 Ball screw shaft 24 Servo motor with encoder 26 Cutting core shaft 28 Cutter stand 30 Cutter 34 Cutter actuator 41 Photoelectric sensor

Claims (4)

[Scope of utility model registration request] 1. A hollow static shaft horizontally supported by a cantilever on the rear end of the machine body and a pair of pulleys supported by the machine body. , An endless winding drive belt that grows a paper tube while diagonally winding a paper tape that is obliquely supplied on the outer periphery of the static shaft, and a rotary spindle that penetrates the static shaft and is slidable in the front-back direction. In a paper tube manufacturing apparatus provided with a sliding rod that is supported by a machine body in parallel with the rotating spindle and is slidable in the front-back direction, and a connecting body that connects the sliding rod and the rear end portion of the rotating spindle. A ball spindle which is parallel to the static shaft and is screw-engaged with the connecting body, and a servomotor with an encoder capable of rotating and driving the screw shaft and having an encoder capable of rotating forward and backward are provided in the machine body, and a rotary spindle protruding from the front end of the static shaft At the front end of the, the paper tube grown on the static axis fits outside The length of a short cutting core shaft that grows in combination is extended, and the cutting rod shaft is supported from below at the front end of the sliding rod, and one cutter is attached to and separated from the cutting shaft. A cutter base with a short length is connected, and a sensor that detects the front end of the paper tube that grows forward beyond the front end of the cutting core shaft is arranged beside the extension line of the cutting core shaft. When it detects it, it activates the servomotor with an encoder, drives the ball screw shaft to rotate, and advances the connected body to move the cutting core shaft and the cutter base forward at the same speed as the axial growth speed of the paper tube. A paper tube manufacturing device characterized in that the rear end of a paper tube having a predetermined length is cut by a cutter on a cutter table. 2. The paper tube manufacturing apparatus according to claim 1, wherein a plurality of sensors for detecting a front end of the paper tube are manufactured by arranging a plurality of sensors beside the extension line of the cutting core axis at intervals in the front-rear direction. A paper tube manufacturing apparatus characterized in that a sensor to be used is selected from a plurality of sensors according to the length of the paper tube. 3. The paper tube manufacturing apparatus according to claim 1, wherein one sensor for detecting the front end of the paper tube is attached so as to be movable and adjustable along a guide rail provided beside the extension line of the cutting shaft. A paper tube manufacturing apparatus characterized in that the sensor mounting position on the guide rail is adjusted and fixed according to the length of the paper tube. 4. The paper tube manufacturing apparatus according to claim 1, wherein a sensor for detecting the front end of the paper tube and a servomotor with an encoder are connected via an adjustable timer.