JPH0411453B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a support device used when supporting a packaging film take-up roll, for example in a fresh food packaging machine.

(Prior Art) Conventionally, in this type of packaging machine, a mounting shaft is rotatably provided below the film supply port of a packaging film conveying device, and a support fitted into the core material of the take-up roll is attached to the mounting shaft. It is inserted through the shaft and fixed at any position. A plurality of leaf springs are provided on the outer periphery of the support and are pressed against the inner peripheral surface of the core material of the take-up roll, so that the take-up roll and the support can rotate integrally via the leaf springs. It's summery. Since this leaf spring bends in accordance with changes in the inner diameter of the core material, one support can be used for various winding rolls whose inner diameters of the core material differ to some extent.

The packaging film pulled out from the take-up roll is guided to a film supply port of the transport device, and is cut into predetermined lengths during transport and transported to a packaging section. At this time, the packaging film is pulled out from the take-up roll by the conveyance force, and the take-up roll and mounting shaft rotate accordingly. However, when the drive of the packaging film transport device is stopped after the transport is completed, the take-up roll and the mounting shaft are rotated. The shaft spins idly due to inertia, and it is necessary to prevent this idling. For example, this idling prevention means includes stopping the driving of the packaging film conveying device and applying a brake to the mounting shaft to stop its inertial rotation.

(Problem to be Solved by the Invention) However, if the pressing force of the leaf spring against the inner circumferential surface of the core material is small, there is a risk that the take-up roll will idle relative to the support even if a brake is applied to the mounting shaft. In some cases, the packaging film between the take-up roll and the film supply port of the transport device loosens and breaks, or the film transport is hindered.

Therefore, the present invention attempts to reliably prevent the take-up roll from idling by using a crimping body that is forcibly pressed against the core material.

Structure of the Invention (Means for Solving the Problems) The present invention has been made to improve the problems of the conventional device, and includes a braking means for stopping the rotation of a rotatably configured mounting member at a desired time. and fixing a clamping ring on one side to the outer peripheral surface of a hollow support cylinder constituting the mounting member,
A clamping ring on the other side is slidably mounted along the outer peripheral surface of the support cylinder, and the clamping ring and a movable body slidably fitted into the support cylinder and having a female threaded hole are integrated. By connecting, the clamping ring is configured to be able to slide along the support tube but not rotate, and is further rotatably held within the support tube and has a male threaded portion carved into the tip. The male threaded portion of the rotary operating rod is screwed into the female threaded portion of the movable body, and a core crimping body is attached between the clamping rings.

(Function) By adopting the above configuration, the present invention has the following features:
By operating the rotation operation rod 25, the movable body 20
The clamping ring 19 is pulled through the core material 3a, the core material crimping body 17 expands in the circumferential direction and is forcibly pressed against the core material 3a, and the winding roll 3 and the support tube 7 can rotate together, and the support tube When the rotation of the roll 7 is stopped, the take-up roll 3 is also stopped at the same time, and idle rotation is prevented.

(Example) Hereinafter, an example in which the present invention is applied to a fresh food packaging machine will be described with reference to the drawings.

As shown in FIG. 1, a support device 1 according to the present embodiment
is attached to a machine frame 2 below a film supply port of a packaging film transport device, and a resin film take-up roll 3 is supported by this support device 1. The packaging film F pulled out from the take-up roll 3 is led to the film supply port of the transport device, and is cut into predetermined lengths during transport and transported to the packaging section.

Next, details of the support device 1 will be explained with reference to FIG. A bearing member 4 is fixed to the machine frame 2, and a rotating shaft 5 is supported within this bearing member 4. An electromagnetic brake 6 as a control means is fixed to one end of the bearing member 4, so that the rotation of the rotating shaft 5 can be stopped. The rotary shaft 5 is projected to the outside of the bearing member 4 on the opposite side of the electromagnetic brake 6, and one end of the support cylinder 7 is fitted concentrically to the outer periphery of the projection 5a, and fixed to each other by a pin 8. There is. A support ring 9 is fitted onto the outer periphery of one end of the support tube 7 and fixed to each other by a set screw 10. This support ring 9
A cylindrical portion 9a that covers a part of the outer circumference of the bearing member 4 is formed in the cylindrical portion 9a. A stopper ring 11 is fitted to the outer periphery of this cylindrical portion 9a, and the two are fixed to each other by set bolts 12. Another support ring 13 is fitted onto the outer periphery of the other end of the support cylinder 7, and a set screw 14
Fixed by Then, the support tube 7 is inserted into the core material 3a of the winding roll 3, and the core material 3a
is supported by the outer peripheral surfaces of the support rings 9 and 13, and one end surface of the take-up roll 3 is brought into contact with the stopper ring 11.

Note that the rotating shaft 5, the support tube 7, the support ring 9, the stopper ring 11, and the support ring 13 rotate together as a unit, as is clear from the above structure, and the core material 3a of the take-up roll 3 is thereby fitted. constitutes a rotatable mounting member.

A clamping ring 15 on one side is fitted onto the outer periphery of the support cylinder 7 between the support rings 9 and 13 and fixed by a set screw 16.
An annular core material crimping body 17 formed of an elastic material such as rubber is fitted onto the outer periphery of the support tube 7 adjacent to the support tube 5 and is fixed to the clamping ring 15 by a pin 18. In this core material crimped body 17, the outer circumferential surface 17a has a mountain-shaped cross section and protrudes in the circumferential direction, and the inner circumferential surface 17b is recessed accordingly. A clamping ring 19 on the other side is fitted to the outer circumference of the support cylinder 7 so as to be slidable along the outer peripheral surface of the support cylinder 7 so that the core material crimped body 17 can be clamped between the clamping ring 15. At the same time, a movable body 20 is fitted into this support cylinder 7, and this clamping ring 19 and movable body 20
and are fixed to each other by pins 22 through a pair of elongated holes 21 formed in the support cylinder 7, which allows the clamping ring 19 to slide but not rotate, and the movable body 20 has a female thread. A hole 23 is formed.

A cap 24 is screwed onto the tip of the support tube 7, and an outer end 26 of a rotary operating rod 25 inserted into the support tube 7 is rotatably supported by the cap 24. A male threaded portion 27 is formed at the inner end of the rotation operating rod 25, and is screwed into the female threaded hole 23 of the movable body 20. This rotating operation rod 25
An operating knob 28 is fitted into the outer end 26 of the two and fixed to each other by a pin 29 and a set screw 30. When the operating knob 28 is grasped and the rotary operating rod 25 is rotated, the male threaded portion 2
7 and the female screw hole 23, the movable body 20 moves within the support tube 7, and along with this movement, the movable side clamping ring 19 also moves around the outer circumference of the support tube 7 in its axial direction, and becomes the fixed side clamping ring. Approach or move away from 15. The core material crimped body 17 between the two clamping rings 15 and 19 swells in the circumferential direction as they approach and is pressed against the inner circumferential surface of the core material 3a of the winding roll 3, and also follows the movable clamping ring 19 by separating them. The core material 3a is elastically returned to its original state and contracted in the circumferential direction to release the pressure contact with the inner circumferential surface of the core material 3a.

The movable body 20 and the rotating operation rod 25 constitute an operating means for moving the two clamping rings 15, 19 toward and away from each other, and the two clamping rings 15, 19
and the operating means 20, 25 constitute a movable mechanism that presses the core material crimping body 17 against the core material 3a.

Now, before installing the take-up roll 3, the core material 3
The supporting rings 9 and 13 are determined according to the inner diameter of the core material crimped body 17 by rotating the rotary operating rod 25 to separate the supporting rings 15 and 19 from each other.
Shrink in the circumferential direction. Next, the core material 3a of the take-up roll 3 is inserted into the support tube 7, the core material 3a is supported by both support rings 9 and 13, and one end surface of the take-up roll 3 is brought into contact with the stopper ring 11. Thereafter, by rotating the rotary operation rod 25, both grip rings 15,
19 are brought close to each other, and the core material crimped body 17 is expanded in the circumferential direction. Thereby, the core material crimping body 17 is forcibly pressed against the inner circumferential surface of the core material 3a, and the crimping body 17 and the core material 3a can rotate together. In addition,
This pressure contact force can be changed by adjusting the amount of rotation of the rotation operating rod 25.

Next, the relationship between the actual wrapping action and the pulling action of the take-up roll 3 will be briefly described.

When the packaging film conveying device is driven with the electromagnetic brake 6 disconnected, the packaging film F is pulled out from the take-up roll 3 by its conveying force.
Together with the take-up roll 3, the core material crimping body 17, both clamping rings 15, 19, the support tube 7, the rotating shaft 5, both the support rings 9,
13, the stopper ring 11, the movable body 20, the rotary operating rod 25, the operating knob 28, etc. rotate as one. The packaging film F pulled out from the take-up roll 3 is cut into predetermined lengths during transportation and transported to the packaging section, and the cut ends are stopped at the film supply port when the packaging film transport device stops driving. and wait. Due to this stop, the electromagnetic brake 6
is activated, the rotating shaft 5 is stopped, and the take-up roll 3 is also stopped.

Effects of the Invention By adopting the above configuration, the present invention not only reliably prevents the take-up roll from idling even if the rotating shaft frequently stops rotating, but also directly compresses the core material crimped body. The structural members are housed in a hollow support tube and are operated within the support tube by operating a rotary operating rod, so the length of the support tube can be shortened and the entire device can be made compact. .

[Brief explanation of drawings]

FIG. 1 is a front view showing a packaging machine using a support device according to this embodiment, and FIG. 2 is a partial sectional view showing the same support device. Support device 1, take-up roll 3, core material 3a, rotating shaft 5, support cylinder 7, support ring 9, stopper ring 11,
Support ring 13, clamping ring 15, core material crimping body 17, clamping ring 19, movable body 20, rotating operation rod 25, packaging film F.

Claims (1)

[Scope of Claims] 1. In a support device that supports the core material of a winding roll 3 on which a resin film or the like is wound, the rotation of the rotatably configured mounting members 5, 7, 9, 11, and 13 is stopped at a desired time. A braking means 6 is provided to fix the clamping ring 15 on one side to the outer peripheral surface of the hollow support cylinder 7 constituting the mounting members 5, 7, 9, 11, 13, and clamping ring 19 on the other side. is slidably mounted along the outer circumferential surface of the support tube 7, and the clamping ring 19 and the movable body 20, which is slidably fitted into the support tube 7 and has a female threaded hole 23, are integrated. By connecting, the clamping ring 19 is configured to be able to slide along the support tube 7 but not rotate, and furthermore, the tip portion rotatably held within the support tube 7 is provided with a male thread. Rotating operation rod 2 with section 27 engraved
A take-up roll for a resin film or the like, characterized in that the male threaded portion 27 of No. 5 is screwed into the female threaded portion 23 of the movable body 20, and a core material crimping body 17 is attached between the clamping rings 15 and 19. Support device for. 2. The support device for a take-up roll for a resin film or the like according to claim 1, wherein the core material crimped body 17 is formed of an elastic body such as rubber.