JP2547248Y2 - Packaging machine roll attachment / detachment device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device capable of easily attaching and detaching a hollow roll such as a cylindrical forming roll and a feed roll of a packaging machine to a roll shaft of the packaging machine.

[0002]

2. Description of the Related Art In general, in a packaging machine, it is necessary to form a large number of pockets for storing 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 formed with a large number of concave portions for carrying a pocket film or a container film already formed with a pocket.

[0003] Incidentally, the pockets formed in the container film need to be changed in accordance with the size, shape, etc. of the articles to be packaged, and the size and shape of the concave portion of the roll are also adjusted accordingly. Need to change.
Therefore, whenever the size or shape of the pocket is changed, the roll is replaced each time. In order to easily and promptly replace such rolls, Japanese Patent Application No. Hei 1-33356 was filed by the same applicant as the present applicant.
No. 6 discloses a hollow roll attaching / detaching device.

In this apparatus, a roll shaft for supporting a roll is rotatably supported in a cantilever manner, a cylinder hole is formed at a free end of the roll shaft, and a piston is movably provided in the cylinder hole. To the supporting end side of the roll shaft, attach a piston rod to the piston, project the piston rod outward from the free end in the axial direction, attach a non-circular fixing member to the tip of the piston rod,
The roll has an end plate attached to the free end side of the roll shaft, and a non-circular hole through which the fixing member passes is formed in the end plate. Here, to remove the roll, supply the fluid pressure into the cylinder, push out the piston rod, move the roll in the axial direction, rotate the roll with respect to the roll axis, align the fixing member with the hole, and pull out the roll Done by
The mounting of the roll is performed by reversing the above order. Although this device can greatly improve the workability of mounting the roll compared to the previous device, it requires a fluid pipe for supplying fluid pressure in the cylinder and its fluid piping system is complicated, There is a problem that it takes a considerable amount of time and labor for maintenance and inspection such as prevention of leakage of working fluid.

[0005]

[Problems to be Solved by the Invention] 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 apparatus, and improves the maintenance and inspection performance. An object of the present invention is to provide a packaging machine roll attaching / detaching device.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a packaging machine roll attaching / detaching apparatus in which a hollow roll is detachably mounted on a rotatably supported roll shaft. The roll shaft is rotatably supported in a cantilever manner, and the roll shaft is provided with a through hole extending in the radial direction of the roll shaft near the free end thereof, and an opening connecting the through hole and the free end is provided. A positioning clamp pin is movably disposed in the through-hole to press the positioning clamp pin radially outward, and a cap having a central hole is attached to a free end of the roll shaft; A rotation knob rotatably supported by the cap and having a shaft extending through the center hole and the opening is provided, and the rotation knob is engaged with the positioning clamp pin at the shaft end of the rotation knob. An eccentric shaft that supports the positioning clamp pin so as to be movable is attached, an end ring that fits with the roll shaft is attached to the roll at a free end side of the roll shaft, and the end ring is engaged with the positioning clamp pin. It is configured with holes that match.

[0007]

In the above arrangement, when the roll is removed from the roll shaft, when the rotary knob is turned to a predetermined stop position, the eccentric shaft at the shaft end of the rotary knob is radially inward of the roll shaft against the elastic force of the spring. By pressing the positioning clamp pin, the positioning clamp pin is pushed down into the roll shaft, disengages from the hole in the end ring and is disengaged from the roll. Therefore, the roll can be pulled out from the roll shaft. When the roll is mounted, the roll is mounted on the roll shaft and the rotary knob is turned to the predetermined mounting position in the opposite direction to the above, and the eccentric shaft at the shaft end of the rotary knob is radially outward of the roll shaft due to the elastic force. In order to push up the positioning clamp pin, 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]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Referring to FIGS. 1 and 2, there is shown an apparatus 1 for attaching and detaching a packaging machine roll according to an embodiment of the present invention. Here, reference numeral 2 denotes a roll shaft rotatably supported by a bearing 3 in a cantilever manner, and reference numeral 4 denotes a gear fixed to the rear end (the right end in FIG. 1) of the roll shaft 2. Rotate the roll axis. Reference numeral 5 denotes a roll fitted to the outside of 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 radially inward from one cylindrical surface of the roll shaft, and the other cylinder connected to the hole 6 A relatively small hole 61 reaching the surface is formed.
The hole 6 is provided with an opening 62 that opens to the free end side of the roll shaft.

In the hole 6, a positioning clamp pin 7 movably provided along the longitudinal direction thereof and a positioning clamp pin 7 provided in the positioning ) Side is provided with a spring 8 for pressing. The spring 8 is supported at one end by a bottom plate 9 having guide pins for guiding the spring 8. An annular groove 71 is formed at the longitudinal center of the positioning clamp pin 7. Also, the tip 72 of the positioning clamp pin is provided.
Is formed in a substantially cylindrical shape with a size smaller than the central portion, and is movably fitted into the hole 61 via a bush 73, while the other end 74 of the positioning clamp pin is connected via a bush 75. It is movably engaged with the hole 6.

A cap 10 is fixed to the free end of the roll shaft 2 by a threaded bolt 101 or other known means, in contact with the end surface thereof and in alignment with the roll shaft 2. An opening for holding a bearing 102 is provided at the center of the cap 10, and the bearing 102 rotatably supports a shaft of a rotation knob described later. Also, cap 1
0 has a first stopper pin 10 protruding from the front side thereof.
3 are attached.

A rotary knob 11 is disposed adjacent to the cap 10 and aligned with the roll shaft 2. Rotation knob 11
A shaft 111 extending in the axial direction of the rotary knob is attached to the center of the shaft. The shaft 111 is rotatably supported by a bearing 102 of the cap. Shaft 1 at the tip of shaft 111
Eccentric shaft 1 eccentric from axis 11 and smaller in diameter than shaft 111
The eccentric shaft 112 is fitted on a bearing 113 mounted in the groove 71 of the positioning clamp pin. An annular groove 115 is formed on the cap-side surface of the rotary knob 11, and the eccentric shaft 11
The second stopper pin 114 is fixed at a position located in the same direction as the eccentric direction of the second (see FIG. 2). Also,
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 set screws. A hole 52 is formed in the end ring 51 at one location in the circumferential direction. The diameter of the hole 52 is such that the tip 72 of the positioning clamp pin can easily pass through the bush 53.

The operation of the present invention in the above configuration 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 11
4 is an angle θ from the center axis 76 of the positioning clamp pin 7
Just a distance away. With the rotation of the rotary knob 11, the shaft 111 rotates and the eccentric shaft 112
, The eccentric shaft 112 presses the wall surface of the groove 71 of the positioning clamp pin via the bearing 113 downward (downward in FIG. 1) against the elastic force of the spring 8.
As a result, the distal end 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.
Is set so as not to go out of the roll shaft 2. Further, when the rotational force is removed from the rotary knob 11 in this state (for example, when the roll 5 is replaced), a force for rotating the stopper pin 114 in the B direction is generated by the elastic force of the spring 8, but the stopper The pin 114 cannot rotate since it is in contact with the stopper pin 103. Therefore, the tip 72 of the crankpin does not come out of the roll shaft 2. Further, in order for the rotation knob 11 to rotate in the C direction, the spring 8
Is required to once bend by the angle θ to the bottom dead center, but there is no such force except for the rotational force, so the rotary knob 11 does not rotate and the stopper pin 114 does not move.
Therefore, the tip 72 of the crankpin does not come out of the roll shaft 2. According to the above state, the used roll can be pulled out from the roll shaft and removed.

When a new roll is mounted, the side of the new roll where the end ring 51 is located is set to the free end side of the roll shaft 2 and the center line of the hole 52 of the end ring is aligned with the positioning clamp pin. Is mounted on the outside of the roll shaft so as to align with the center line of the tip 72 of the roll.

Next, by rotating the rotary knob 11 in the direction of arrow C in FIG.
, The eccentric shaft 112 moves in the same direction around the axis of the shaft 111 along with moving upward through the bottom dead center D, and the eccentric shaft 112 is Of the groove 71 is pushed up. Since the positioning clamp pin 7 is urged upward by the spring 8, this pushing-up operation is easily performed. By this pushing-up operation, the tip 7 of the positioning clamp pin is
2 is moved upward and inserted into the hole 52 of the end ring,
The roll shaft 2 and the roll 5 are positioned and fixed to each other.

[0017]

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 the rotation of the rotary knob. No system is required,
Not only the structure is simple and maintenance and inspection are easy, but also effects such as replacement of rolls can be performed more quickly than before.

[Brief description of the drawings]

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

FIG. 2 is a view seen from the AA direction in FIG. 1, and shows a positioning clamp pin, a shaft and an eccentric shaft of a rotary knob, a first stopper pin, and a second stopper pin in a partially cutaway state. It is a figure which shows the mutual positional relationship between.

[Explanation of symbols]

1: Packaging machine roll attaching / detaching 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: Rotary knob 111: Shaft 112: Eccentric shaft 113: Bearing 114: Second stopper pin

Claims (1)

(57) [Scope of request for utility model registration] 1. A packaging machine roll attaching / detaching device for removably mounting a hollow roll on a rotatably supported roll shaft, wherein the roll shaft is rotatably supported in a cantilever manner, and is mounted on the roll shaft. Is provided with a through-hole extending in the radial direction of the roll shaft near the free end thereof, and an opening connecting the through-hole and the free end, and a positioning clamp pin is movable in the through-hole. It is arranged and presses the positioning clamp pin radially outward, and a cap having a central hole is attached to a free end of the roll shaft, and the cap is rotatably supported by the cap and the central hole and the central hole. Disposing a rotation knob having an axis extending through the opening;
An eccentric shaft that engages with the positioning clamp pin and movably supports the positioning clamp pin is attached to a shaft end of the rotation knob, and an end of the roll that fits with the roll shaft on a free end side of the roll shaft. A mounting and dismounting device for a packaging machine roll, wherein a hole for engaging with the positioning clamp pin is provided in the end ring by attaching a partial ring.