JPS6346338Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a packaging material, etc., which can easily attach a roll around which relatively heavy packaging material, etc. is wound, in a packaging machine, etc. Concerning a roll holder.

(Prior Art) Conventionally, as a holder for mounting and supporting packaging materials, etc., there exists, for example, the one described in Japanese Utility Model Publication No. 57-34220. In this conventional device, a cylindrical body 14f such as a bobbin is fitted onto a shaft 1f supported at one end as shown in FIG. ,3
1 and 32 are arranged.

However, in this type, the cylindrical body 14f
It can be installed simply by fitting it onto the shaft 1f, making it easy to install, and O-rings 30, 31,
Although the presence of 32 has the advantage of increasing its supporting force, it has the following disadvantages in practical terms. That is, in this holder, it is sufficient that the mounting position of the cylindrical body 14f with respect to the shaft 1f is always constant, but it is difficult to position the cylindrical body 14f by changing its position in the direction of the arrow a; The problem is that there is no flexibility when making changes.

Therefore, in the past, a roll holder such as that shown in FIG. 2 has been widely used in packaging machines and the like. This conventional one has a frame 5 similar to the above.
The shaft 1e is supported at one end,
When mounting the roll 14, substantially conical cones 11, 11a are inserted into openings 20, 20a at both ends of the roll 14 to position and fix the roll 14. According to this means, by changing the positions of the cones 11 and 11a, the mounting position of the roll 14 can be freely adjusted along its width direction.

(Problem to be solved by the invention) Therefore, in the conventional device, after the roll 14 is fitted onto the shaft 1e, one of the cones 11a
When the roll 14 is inserted into the opening 20a on the one end side of the roll 14, it becomes necessary to lift the one end side of the roll 14 in the direction of the arrow A as shown in FIG.

However, in order to avoid frequent roll replacement, the roll 14 is usually large in size and often weighs 25 to 30 kg or more, so it is very heavy.
The workability of the work is such that it requires a great deal of effort to lift the roll 14 with one hand and fit the cone 11a into the opening 20a with the other hand, and a worker with weak strength cannot perform the work. It was causing problems.

(Means for Solving the Problems) The present invention improves the above-mentioned conventional method by providing a fulcrum on the shaft that can reduce the lifting load of the roll when lifting the roll when fitting the cone into the opening of the roll. It was designed to solve problems.

That is, in the present invention, on the outer periphery of the shaft 1 on which the roll 14 of a cylindrical packaging material or the like is fitted and supported, one end side of the roll 14 fitted on the shaft 1 is lifted up and the one end side is attached. When the cone 11a is inserted into the opening 20a of the roll 14, the convex part 16 comes into contact with the inner wall surface 17 at the approximate center of the hole 21 of the roll 14 and becomes a fulcrum that supports the weight load of the roll 14.
is provided integrally or separately from the shaft 1,
This is a holder for rolls of packaging materials, etc.

(Function) In the holder for rolls of packaging material, etc., configured as described above, when fitting the cone 11a into the opening 20a of the roll 14 and positioning it, the convex portion 16
This serves as a fulcrum when lifting the roll 14, that is, a fulcrum based on the lever principle, and the roll 14 can be lifted with a very weak force.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a shaft which is supported at one end by a frame 5 and is provided in a horizontal state, and which is fitted around a core shaft 2 which is pivotally attached to the frame 5 and the core shaft 2 via bearings 3, 3. It is composed of a sleeve 4. Reference numeral 6 denotes a ring-shaped support body having a tapered surface 7 on its outer peripheral surface, which is formed separately from the shaft 1, but the support body 6 is fitted around the shaft 1 at approximately the center position and pressed. A convex portion 16 according to the present invention is formed on the outer periphery of the shaft 1 by being positioned and fixed by screws 15 .

Reference numeral 8 indicates a disk provided at one end of the sleeve 4 of the shaft 1 to rotate in conjunction with the sleeve 4, and 9 indicates a brake that brakes the sleeve 4 by holding the disk 8 therebetween.

To explain an example of the use of the holder having the above structure, first, as shown in FIG. 1, a cone 11 having a tapered surface 10 on the outer circumferential surface is fitted and positioned on one end side of the shaft 1 in advance. Next, a roll 14 in which a packaging material 12 such as a synthetic resin film is wound around a core tube 13 is fitted onto the shaft 1 from the other end side. At that time, roll 1
4 smoothly rides over the support 6 along the tapered surface 7 of the support 6, and the support 6 crosses the roll 14.
There is no problem that will hinder the external fitting work.

After that, the opening 20 on one end side of the roll 14
With the cone 11 partially fitted into the roll 14, another cone 1 is inserted into the opening 20a at the other end of the roll 14.
Insert 1a. The inner wall surface 17 of the roll 14 at the approximate center of the hole 21 is in contact with the protrusion 16, and most of the weight of the roll 14 is supported by the protrusion 16. According to the lever principle, the other end 14b of the roll 14 can be lifted in the direction of arrow B with one hand with a very small force. Therefore, in this lifted state, the cone 11a can be easily inserted into the opening 20a of the roll 14 with the other hand. Thereafter, by positioning the cone 11a, the roll 14 can be fixed, and the packaging material 12 of the roll 14 can be suitably fed and fed to other work process positions. In addition, by applying the brake 9 to the disc 8 when feeding out the packaging material, it is possible to apply appropriate tension to the packaging material 12.
This makes it possible to suitably prevent so-called overlapping from occurring in the packaging material 12.

In the above embodiment, the convex portion 16 is provided by fitting the ring-shaped support 6 having a tapered outer peripheral surface onto the shaft 1, but the present invention is not limited thereto. For example, the protrusion 16 may be formed integrally with the shaft 1, and the protrusion 16 may be formed integrally with the shaft 1.
It is not necessary to form a tapered surface on the outer surface. however,
Forming a tapered surface on the outer surface of the convex portion 16 allows the work of fitting the roll 14 onto the shaft 1 to be carried out smoothly.Furthermore, if the convex portion 16 is formed separately from the shaft 1, it can be manufactured easily and easily. This is preferable since it provides the advantage that the set position of the convex portion 16 can be freely adjusted.

Further, in the present invention, the position where the convex portion 16 is provided is not necessarily limited to the exact center position of the shaft 1. The position can be changed arbitrarily depending on the width dimension of the roll 14 and the mounting position of the roll 14, and the point is that the position is in contact with the inner surface of the approximately central part of the roll and receives the roll load when lifting one end side of the roll. It suffices if it is provided so as to serve as a lifting fulcrum.

Furthermore, the present invention has a shaft 1 and a cone 11,1.
The specific configuration of 1a is not limited as in the above embodiment, and of course a disc brake or the like is not an essential requirement of the present invention.

The specific structure of each part of the holder according to the present invention can be freely modified within the scope of the present invention, and the type of roll is not limited to packaging materials.

(Effect of the invention) As described above, the present invention forms a convex portion on the outer peripheral surface of the shaft for externally fitting the roll, lifts one end of the roll, and inserts a cone into the opening on the one end. Since the convex portion is configured to support the weight load of the roll when it is inserted,
When positioning a roll with a cone, there is no need for the conventional effort of lifting the entire weight of the roll, and the roll can be lifted with a very weak force using the lever principle, which reduces the amount of force. Even a weak worker can easily perform the work of positioning and mounting the roll, and the workability has been improved, which is a special effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the holder according to the present invention. FIGS. 2A, 2B and 3 are sectional views showing conventional examples. 1...Shaft, 5...Frame, 11, 11
a... Cone, 14... Roll, 16... Convex part,
17... Inner wall surface, 20, 20a... Opening, 21
...hole.

Claims (1)

[Scope of utility model registration request] A shaft 1 for fitting and supporting a roll 14 of a cylindrical packaging material or the like is provided in a horizontal state with one end supported by a frame 5, and openings at both ends of the roll 14 to be fitted onto the shaft 1 are provided. In the holder for rolls such as packaging materials, which is configured to position and fix the roll 14 by fitting a pair of cones 11 and 11a into the respective cones 20 and 20a, a shaft 1 is provided on the outer periphery of the shaft 1. When lifting one end side of the roll 14 fitted to the outside and fitting the cone 11a into the opening 20a on the one end side, the roll 14 comes into contact with the inner wall surface 17 at the approximate center of the hole 21 of the roll 14, and the roll A holder for a roll of packaging material, etc., characterized in that a convex portion 16 serving as a fulcrum for supporting a weight load of 14 is provided integrally with the shaft 1 or separately.