JPH0616202U - Packaging machine roll attachment / detachment device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a packaging machine roll attachment / detachment device that does not require pressure fluid piping, is easy to operate, and improves maintenance and inspection. [Structure] A roll shaft 2 is rotatably supported in a cantilever manner, a through hole extending in a radial direction is provided on a free end side of the roll shaft 2, and a positioning clamp pin 7 is movable in the through hole. The cap 10 having a central hole is attached to the free end surface of the roll shaft 2, and the cap 10 has a shaft rotatably supported and extending in the axial direction of the roll shaft. Further, a rotary knob 11 having an eccentric shaft for movably supporting the positioning clamp pin 7 is disposed on the shaft end thereof, and the roll 5 has a hole aligned with the positioning clamp pin on the free end side of the roll shaft 2. The end ring 51 provided is attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device in which a hollow roll such as a cylindrical forming roll or a feed roll of a packaging machine can be easily attached to and detached from a roll shaft of the packaging machine.

[0002]

[Prior art]

 Generally, in a packaging machine, it is necessary to form a large number of pockets for containing articles such as tablets in a strip-shaped container film and to continuously supply the container film. The container film is conveyed by using a roll in which a large number of concave portions for carrying the container film or the pocket-molded container film are formed.

By the way, the pocket formed in the container film needs to be changed in accordance with the size and shape of the packaged product, and the size and shape of the concave portion of the roll should be adjusted accordingly. Need to change. For this reason, the roll is replaced whenever the size and shape of the pocket is changed. In order to easily and quickly replace the roll, a hollow roll attaching / detaching device disclosed in Japanese Patent Application No. 1-335966 filed by the same applicant as the present applicant is provided.

This device rotatably supports a roll shaft supporting a roll in a cantilever manner and forms a cylinder hole at a free end of the roll shaft, and a piston is movably provided in the cylinder hole. The piston is elastically pressed toward the supporting end of the roll shaft, the piston rod is attached to the piston to axially project the piston rod outward from the free end, and a non-circular fixing member is attached to the tip of the piston rod. An end plate is attached to the free end side of the roll shaft of the roll, and a non-circular hole through which the fixing member passes is formed in this end plate. Here, the roll can be removed by supplying fluid pressure into the cylinder, pushing out the piston rod to move the roll in the axial direction, and rotating the roll with respect to the roll shaft to align the fixing member with the hole and pull out the roll. The roll loading is performed by reversing the above order. This device can greatly improve the workability of roll mounting compared to the previous one, but it requires fluid piping to supply fluid pressure into the cylinder and its fluid piping system is complicated. There has been a problem that maintenance and inspection such as leakage of working fluid takes a considerable amount of time and effort.

[0005]

[Problems to be solved by the device]

 The present invention solves the above-mentioned problems in the conventional packaging machine, eliminates the need for a pressure fluid piping system, improves the operability of the device, and allows the maintenance and inspection of the packaging machine roll to be attached and detached. The purpose is to provide a device.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a packaging machine roll attachment / detachment device in which a hollow roll is removably mounted on a rotatably supported roll shaft, and the roll shaft is rotatable in a cantilever manner. The roll shaft is provided with a through hole adjacent to its free end and extending in the radial direction of the roll shaft, and an opening connecting the through hole and the free end is provided in the through hole. A positioning clamp pin is movably arranged to elastically press the positioning clamp pin radially outward, a cap having a central hole is attached to the free end of the roll shaft, and the cap is rotatable on the cap. A rotation knob having a shaft extending through the central hole and the opening is supported by the rotation knob, and the positioning clamp pin engages with the positioning clamp pin at the shaft end of the rotation knob. An eccentric shaft for movably supporting the roll shaft is attached to the roll, and an end ring fitted to the roll shaft is attached to the free end side of the roll shaft, and a hole for engaging the positioning clamp pin is attached to the end ring. It is provided and configured.

[0007]

[Action]

 In the above configuration, when removing the roll from the roll shaft, if the rotary knob is turned to a predetermined stop position, the eccentric shaft at the shaft end of the rotary knob will be positioned inward in the radial direction of the roll shaft against the elastic force of the spring. By pressing the clamp pin, the locating clamp pin is pushed down into the roll shaft and out of the hole in the end ring to disengage the roll. Therefore, the roll can be pulled out from the roll shaft. Also, when mounting the roll, when the roll is mounted on the roll shaft and the rotary knob is rotated in the opposite direction to the specified mounting position, the eccentric shaft at the shaft end of the rotary knob is radially outward of the roll shaft due to the elastic force. Since the positioning clamp pin is pushed up to, the positioning clamp pin is inserted into the hole of the end ring from inside the roll shaft, and the roll is fixed to the roll shaft.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Referring to FIGS. 1 and 2, there is shown a packaging machine roll attaching / detaching device 1 according to an embodiment of the present invention. Here, 2 is a roll shaft rotatably supported by a bearing 3 in a cantilever manner, and 4 is a gear fixed to the rear end (right end in FIG. 1) side of the roll shaft 2. To rotate the roll shaft. Reference numeral 5 is a roll fitted outside the roll shaft 2.

At a position close to the tip (free end) of the roll shaft 2, a relatively large diameter hole 6 extending inward in the radial direction from one cylindrical surface of the roll shaft 2 and the other cylinder connected to the hole 6 are provided. A hole 61 having a relatively small diameter reaching the surface is formed, and the hole 6 is provided with an opening 62 that opens to the free end side of the roll shaft.

A positioning clamp pin 7 movably provided along the longitudinal direction of the hole 6 and a positioning clamp pin 7 provided in the positioning clamp pin 7 on the other side (upward in FIG. 1). ) Side is provided with a spring 8 for elastic pressure. The spring 8 is supported at one end by a bottom plate 9 having a guide pin for guiding the spring 8. An annular groove 71 is formed in the central portion of the positioning clamp pin 7 in the longitudinal direction. Further, the distal end portion 72 of the positioning clamp pin is formed in a substantially cylindrical shape with a size smaller than the central portion and is movably fitted into the hole 61 via the bush 73, while the positioning clamp pin is The other end portion 74 is movably engaged with the hole 6 via a bush 75.

At the free end of the roll shaft 2, the cap 10 is fixed to the free end of the roll shaft 2 in alignment with the end face of the roll shaft 2 by means of a threaded bolt 101 or other known means. The cap 10 is provided with an opening for holding the bearing 102 at the center thereof, and the bearing 102 rotatably supports the shaft of a rotary knob described later. A first stopper pin 103 protruding from the front side surface of the cap 10 is attached.

A rotary knob 11 is arranged adjacent to the cap 10 and aligned with the roll shaft 2. A shaft 111 extending in the axial direction of the rotary knob is attached to the center of the rotary knob 11, and the shaft 111 is rotatably supported by a bearing 102 of the cap. An eccentric shaft 112, which is eccentric from the axis of the shaft 111 and has a diameter smaller than that of the shaft 111, is formed at the tip of the shaft 111. The eccentric shaft 112 is fitted into a bearing 113 mounted in the groove 71 of the positioning clamp pin. ing. An annular groove 115 is formed on the cap-side surface of the rotary knob 11, and a second stopper pin 114 is fixed to the groove 115 at a position located in the same direction as the eccentric direction of the eccentric shaft 112 ( (See Figure 2). Further, one end of the first stopper pin 103 extending from the cap 10 is engaged with the groove 115. An end ring 51 is fixed to one end of the roll 5 (an end on the free end side of the roll shaft 2) by a known means such as a plurality of setscrews. A hole 52 is formed at one location in the circumferential direction on the end ring 51, and the hole 52 has a diameter such that the tip 72 of the positioning clamp pin can easily pass through the bush 53.

The operation of the present invention having the above structure will be described. First, as shown in FIG. 2, the rotary knob 11 is rotated in the direction of arrow B until the second stopper pin 114 of the rotary knob comes into contact with the first stopper pin 103 of the cap. When the second stopper pin 114 is in contact with the first stopper pin 103, the second stopper pin 114 is at a position separated from the central axis 76 of the positioning clamp pin 7 by an angle θ. With the rotation of the rotary knob 11, the shaft 111 rotates and the eccentric shaft 112 moves around the axis of the shaft 111, and the eccentric shaft 112 causes the bearing 113 to position the wall surface of the groove 71 of the clamp pin to the spring 8. It is pressed downward (downward in Fig. 1) against the elastic force. As a result, the tip portion 72 of the positioning clamp pin is moved downward and housed in the roll shaft 2, and the fixed state between the roll shaft and the roll is released. When the stopper pin 114 is in contact with the stopper pin 103 of the cap, the eccentric shaft 112 pushes up the pin 7 by an amount corresponding to the angle θ. It is set not to go out. Further, when the rotational force is removed from the rotary knob 11 in this state (for example, when the roll 5 is replaced), the force generated by the spring 8 tends to rotate the stopper pin 114 in the B direction, but the stopper pin 114 is rotated. Since the pin 114 is in contact with the stopper pin 103, it cannot rotate. Therefore, the tip portion 72 of the crank pin does not go out of the roll shaft 2. Furthermore, in order for the rotary knob 11 to rotate in the C direction, a force that temporarily bends the spring 8 by the angle θ up to the bottom dead center is required, but there is no such force when the rotational force is removed, so there is no rotation. The knob 11 does not rotate and the stopper pin 114 does not move. Therefore, the tip 72 of the crank pin does not go out of the roll shaft 2. In the above state, the used roll can be pulled out from the roll shaft and removed.

When mounting a new roll, the side of the new roll having the end ring 51 is set to the free end side of the roll shaft 2, and the center line of the hole 52 of the end ring and the positioning clamp are used. The pin 72 is mounted on the outside of the roll shaft in alignment with the center line of the tip portion 72.

Next, by rotating the rotary knob 11 in the direction of arrow C in FIG. 2, the stopper pin 114 also rotates in the direction of arrow C and moves upwards after passing through the bottom dead center D. The eccentric shaft 112 moves around the axis of the shaft 111 in the same direction, and the eccentric shaft 112 pushes the wall surface of the groove 71 of the positioning clamp pin upward through the bearing 113. Since the positioning clamp pin 7 is biased upward by the spring 8, this pushing-up operation can be easily performed. By this pushing-up operation, the tip 72 of the positioning clamp pin is moved upward and inserted into the hole 52 of the end ring, and the roll shaft 2 and the roll 5 are positioned and fixed to each other.

[0017]

[Effect of device]

 According to the present invention, as described above, the positioning clamp pin is moved by the spring force, and the positioning clamp pin is operated by rotating the rotary knob. Not only is the structure simple and maintenance is easy, but the rolls can be replaced more quickly than before.

[Brief description of drawings]

FIG. 1 is a sectional view of a device for attaching and detaching a packaging machine roll of the present invention.

FIG. 2 is a view as seen from the direction AA of FIG. 1, in which a positioning clamp pin, a rotary knob shaft and an eccentric shaft, a first stopper pin and a second stopper pin are shown with a part cut away. It is a figure which shows the mutual positional relationship between.

[Explanation of symbols]

1: Packaging machine roll attachment / detachment device 2: Roll shaft 3: Bearing 4: Gear 5: Roll 51: End ring 6: Hole 62: Opening 7: Positioning clamp pin 71: Groove 72: Tip 8: Spring 9: Bottom plate 10: Cap 102: Bearing 103: First stopper pin 11: Rotation knob 111: Shaft 112: Eccentric shaft 113: Bearing 114: Second stopper pin

Claims (1)

[Scope of utility model registration request] 1. A packaging machine roll attaching / detaching device in which a hollow roll is detachably attached to a rotatably supported roll shaft, wherein the roll shaft is rotatably supported in a cantilever manner, and the roll shaft is attached to the roll shaft. Is provided with a through hole that extends in the radial direction of the roll shaft in the vicinity of the free end thereof, and an opening that connects the through hole and the free end is provided, and a positioning clamp pin can be moved in the through hole. It is arranged to elastically press the positioning clamp pin outward in the radial direction, a cap having a central hole is attached to the free end of the roll shaft, and the cap is rotatably supported by the cap and the central hole and the cap. Arrange a rotary knob with a shaft extending through the opening,
An eccentric shaft that engages with the positioning clamp pin and movably supports the positioning clamp pin is attached to the shaft end of the rotation knob, and the roll has an end fitted to the roll shaft on the free end side of the roll shaft. An attaching / detaching device for a packaging machine roll, wherein a part ring is attached and a hole for engaging with the positioning clamp pin is provided in the end ring.