JPH0563374B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides a method for easily attaching a hollow roll such as a cylindrical forming roll or a feed roll of a blister packaging machine to a roll shaft into which it can be inserted. The present invention relates to a method and device for attaching and detaching.

(b) Prior art In a blister packaging machine, a forming device forms a number of pockets in a belt-shaped container film into which items such as tablets are placed, the pockets are filled with the items, and then a cover film is placed on top of the container film. The two are sealed together with adhesive. In such a packaging machine, in order to continuously form pockets on the container film, the forming device is composed of a continuously rotating roll, and a large number of recesses for forming pockets are formed on the outer peripheral surface of the roll. ing. Furthermore, when feeding a container film with a pocket formed thereon, it is not possible to feed the film by sandwiching it between a pair of rolls with flat outer peripheries, so the feed roll also has a recess that fits the pocket formed in the container film or a recess that receives the pocket. is forming.

By the way, the pockets formed in the container film need to be changed in accordance with changes in the size, shape, etc. of the packaged items, and the size and shape of the recesses in the roll must also be changed accordingly. There is a need. For this reason, the roll is made hollow and removably fitted to the outside of the roll shaft, and the roll is replaced each time there is a change in the size or shape of the pocket. In this case, conventional methods for fixing the roll to the roll shaft include forming a male thread at the center of the free end of the roll shaft, screwing a nut into the male thread, and fixing and holding the roll with the nut, or attaching the roll to the roll. The method used is to screw a bolt through the end plate into the free end of the roll shaft.

However, these methods have the problem that the replacement work is complicated and time consuming, and requires a high degree of skill.

(C) Problems to be Solved by the Invention The problems to be solved by the present invention are to solve the problem by providing a cylinder at the free end of the roll shaft and operating a fixing member that fixes and holds the roll by the cylinder, thereby making it possible to replace the roll. The goal is to make it easy to do.

(d) Means for Solving the Problems One of the inventions of the present application is a hollow roll attachment/detachment method in which a hollow roll is removably mounted on a rotatably supported roll shaft. A cylinder is provided in the free end of the roll shaft, a piston rod of the cylinder projects outward from the free end so as to be movable in the axial direction, and a fixing member is attached to the tip of the piston rod. It is configured to press the piston rod in a retracting direction and press the roll with the fixing member.

Another invention of the present application is a hollow roll attachment/detachment device that removably attaches a hollow roll to a rotatably supported roll shaft, in which the roll shaft is rotatably supported in a cantilever manner, and the roll shaft is A cylinder hole is formed in the free end of the roll shaft, a piston is movably provided in the cylinder hole to press the piston toward the support end of the roll shaft, and a piston rod is attached to the piston to move the piston rod outward from the free end. 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, and the non-circular fixing member is passed through the end plate. It is made up of holes.

(e) Effect In the above structure, when attaching the roll to the roll shaft or removing the roll, fluid pressure is supplied into the cylinder hole to push out the piston rod. In this state, when removing the roll, move the roll in the axial direction, rotate the roll about the roll axis, align the fixing member with the hole, and pull out the roll, and when attaching the roll, attach the roll to the roll axis and remove the fixing member. The roller is aligned with the hole and pushed through the hole, and then the roll is rotated to shift the fixing member and the hole to discharge fluid from the cylinder hole and fix the roll by the fixing member.

(F) Embodiments Embodiments of the present invention will be described above with reference to the drawings.

1 and 2, a hollow roll attachment/detachment device 1 of this embodiment is shown. In the figure, 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 (left end in Figure 1) of the roll 2. to rotate the roll axis. 5 is a roll fitted on the outside of the roll shaft 2.

A cylinder 6 is built into the tip of the roll shaft 2, that is, the free end. This cylinder 6 has a cylinder hole 61 formed at the free end, and a cylinder hole 61 formed at the free end.
a piston 62 movably provided within;
A piston rod 64 is fixed to the piston 62 and extends axially outward through a hole in a cover 63 which is fitted and fixed to the open end of the cylinder hole, and the cover 6
3 and the piston 62, and presses the piston toward the support end of the roller shaft.
It is made up of. The cylinder hole is connected through a passage 21 formed in the axis of the roll shaft 2 to a rotary joint 22 of a known structure provided on the support end side of the roll shaft, and fluid pressure is applied through the rotary joint 22. supply is becoming available.

A substantially rectangular fixing member 7 is fixed to the tip of the piston rod 64 by a screw 71.

An end plate 8 is fixed to one end of the roll 5 (the end on the free end side of the roll shaft 2) with a plurality of setscrews 81. A hole 82 having the same planar shape as the fixing member 7 and through which the fixing member can pass is formed in the center of the end plate 8.

Note that 24 is a positioning key attached to the flange 23 of the roll shaft 2, and a notch 51 for receiving the positioning key 24 is formed on the outer periphery of the end face of the flange 23 of the roll 5.

In the above configuration, when a new roll is attached to the roll shaft, fluid pressure is supplied into the cylinder hole 61 through the passage 21 to press the piston 62 toward the free end, and the fixing member 7 is attached to the free end of the roll shaft 2. In this state, the roll 5 is mounted on the outside of the roll shaft with the end with the notch 51 facing the flange 23. Then, attach the fixing member 7 to the hole 82 of the end plate 8.
the end plate 8 to the fixing member 7.
Move it closer to the roll axis 2 side. Then, the end surface of the roll 5 is brought into contact with the flange 23 by fitting the notch 51 into the positioning key 24. In this state, the longitudinal direction of the fixing member 7 and the longitudinal direction of the hole 82 are approximately at right angles, as shown in FIG.
Therefore, when the fluid pressure in the cylinder hole 61 is discharged, the piston 62 is pushed toward the supporting end side of the roll shaft 2 by the spring 65, and the end plate 8 of the roll 5 is pushed by the fixing member 7.
Press to hold the roll in place. Positioning key 2
4 into the notch 51, if the direction of the fixing member and the direction of the hole are not substantially perpendicular, the fixing member 7 may be rotated together with the piston 62 to make them substantially perpendicular.

In order to remove the row 5 from the roll shaft 2, fluid pressure is supplied into the cylinder hole 61 to move the piston 62, and then the above-mentioned operation is performed in reverse.

The cross-sectional shape of the piston rod 64 and the shape of the hole in the cover 63 through which the piston rod passes are made non-circular so that the piston rod and the fixing member do not rotate, and the positioning key 24 is aligned with the notch 51 of the roll 5. Fixing member 7
The hole 82 of the end plate 8 may be made to be almost at right angles.

Furthermore, although not shown in the above embodiment, when the roll 5 is used as a film forming roll, a plurality of intake passages communicating with the numerous recesses 52 formed on the outer surface are provided in the circumferential direction around the roll axis, in addition to the passage 21. The intake passage may be successively or constantly connected to a vacuum source via a rotary valve of a known structure provided on the supporting end side of the roll shaft.

(g) Effects According to the present invention, the roll can be easily attached and detached from the roll shaft by simply moving the cylinder, so the work can be done quickly without requiring any skill, and it is easy to work because no special tools are required. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of a hollow roll attachment/detachment device according to the present invention, and FIG. 2 is a view taken from the line - in FIG. 1. 1: Roll attaching/detaching device, 2: Roll shaft, 5: Roll, 6: Cylinder, 61: Cylinder hole, 62:
Piston, 64: Piston rod, 7: Fixing member, 8: End plate, 81: Hole.

Claims (1)

[Scope of Claims] 1. A method for attaching and detaching a hollow roll in which a hollow roll is removably mounted on a rotatably supported roll shaft, in which the roll shaft is rotatably supported in a cantilevered manner, and the roll shaft is rotatably supported. A cylinder is provided in the free end, a piston rod of the cylinder projects outwardly from the free end so as to be movable in the axial direction, a fixing member is attached to the tip of the piston rod to press the piston rod in a retracting direction, and the piston rod is retracted. A method for attaching and detaching a hollow roll characterized by holding the roll with a fixing member. 2. A hollow roll attachment/detachment device that removably attaches a hollow roll to a rotatably supported roll shaft, in which the roll shaft is rotatably supported in a cantilevered manner and a cylinder hole is provided at the free end of the roll shaft. A piston is movably provided in the cylinder hole to press the piston toward the support end of the roll shaft, and a piston rod is attached to the piston so that the piston rod projects outward from the free end in the axial direction. 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, and a non-circular hole is formed in the end plate for the fixing member to pass through. Features a hollow roll attachment/detachment device.