JPS60132876A - Fixing device of film core - Google Patents

Abstract

PURPOSE:To realize simple and certain fixation of a film core to an axial center by fitting an elastic material to requiring parts of the axial center and equipping said parts with the film core and providing means which axially compress the elastic material. CONSTITUTION:An elastic material 2 is fitted to requiring parts of an axial center 1 and said parts are equipped with film cores 3. Then means axially pressing the elastic material 2, for example, letter U-like fastening metal fittings 5 rotatably fitted to the axial center are provided to form a fixative device of the film core 3. Further, the elastic body 2 shaped, for example, like a ring is used and this is arranged alternately with an inelastic, for example, metallic ring 4. At this time, the outer width H1 of the elastic material 2 in uncompressed condition, the expanded outer width H2 of said material in compressed condition and the inner diameter D of the film core 3 are set to satisty the formula H1<=D< H2. This enables simple and certain fixation of the film core 3 to the axial center 1.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is applied to magazines for devices that use films and chips, such as cameras, bidet spears, and tape recorders, as well as other belt-like object winding devices. This invention relates to a film core fixing device. In addition, in this specification, a belt-like object in general is referred to as a film, and a member for winding up the film is referred to as a film core.

(Prior art) A conventional film core rigid bag device prevents the film core from twisting when the shaft core rotates when the film core is attached to the shaft core of the magazine (hereinafter simply referred to as the "shaft core"). In order to do this, a retaining means, symbolized by a key and a keyway, is generally provided between the shaft core and the film core.

This type of attachment has the disadvantage that it takes time to position the film core relative to the shaft core. That is,
In the case of the key and keyway as described above, it is clear from our experience that the key and keyway cannot be matched instantly. In order to solve this problem, there are models that have multiple keys and key grooves, but in any case, it is difficult to precisely match the engagement to the fixed position desired by the operator, and in this case, This causes problems such as abrasion caused by friction when the key and the keyway are engaged, and a certain amount of looseness even when the key is engaged. These drawbacks and inconveniences apply not only to keys and keyways, but also to alternative locking means.

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to improve this type of film core fixing device and completely eliminate the above-mentioned drawbacks or inconveniences.

(Structure of the Invention) In order to achieve the above object, the present invention uses an elastic material to fix the shaft core and the film core in place of the conventional engagement method when mounting the film core on the film core mounting portion of the shaft core. The basic configuration is to perform crimping using the bulge. That is, the present invention includes means for fitting an elastic material into the film core mounting portion of the shaft core, mounting the film core at that location, and further compressing the elastic material in the axial direction. is provided to bulge due to compression in the axial direction, and between the outer width H2 of the elastic material when not compressed, the swollen outer width H2 of the elastic material when compressed, and the inner diameter of the film core, The content thereof is a film core fixing device characterized in that it is provided so that old≦D<H2.

(Example) The present invention will be explained below based on preferred embodiments.

The film core fixing device according to the present invention has an elastic material 2 made of soft plastic, natural rubber, etc. fitted to the film core mounting portion of the shaft core l, and a film core 3 mounted thereon. It is equipped with means for compressing the elastic material 2 in the axial direction. In this example, a ring-shaped elastic material 2 is used, and the punches are arranged alternately with non-elastic rings 4.4 made of metal, for example. It is set up. When they are arranged alternately in this way, there is an advantage that the elastic material is uniformly bulged during compression of the elastic material, which will be described later.
Ru.

The means for compressing the elastic material 2 in the axial direction is provided in this example by a U-shaped stopper 5 rotatably mounted on the axis l. This stopper 5 rotates about a shaft 51 perpendicular to the axis 1 as a fulcrum, and this rotation causes the shaft 51 and the ring 4 to rotate. They are formed so as to have different intervals from the topmost one. That is, as shown in FIG. 3, the stopper 5t! <The distance t between the shaft 51 and the lower end of the arcuate portion 52 in the upright state (1) is greater than the distance t between the shaft 51 and the lower end of the arcuate portion 52 in the state (2) when the stop or metal fitting 5 is rotated. Distance T from 52a
By making large the uppermost ring 4 and lower end disk 1
This allows the space between the material and the material a to be widened, thereby compressing the elastic material 2 disposed therebetween. In addition, in FIG. 3 (2), the terminal end 52a of the circular arc portion 52 that contacts the uppermost ring 4 is located on the left side with respect to the axial direction m, that is, the temporary filament n connecting the shaft 51 and the terminal end 52a is Since the angle θ is provided in the clockwise direction with respect to the axial direction m, the reaction force generated by compressing the elastic member 2 urges the stopper 5 to rotate clockwise (in the direction of the arrow in the figure).
As a result, the rotational state of the stopper 5 shown in FIG. 3(2) is maintained as it is. Such a stopper 5
When the compression means is constructed using the above-described compression means, there is no need for a separate rotation maintaining means during rotation as described above, and the rotation can be performed in either the left or right direction with respect to the shaft 51. It is extremely convenient.

However, it goes without saying that the compression means is not limited to those described above, and any other known means may be used.

The elastic material 2 is provided so as to be expanded by compression in the axial direction. This can be done by leaving the outer portion of the elastic material open in the direction orthogonal to the compression direction without closing it, as in this example. Furthermore, as shown in FIGS. 4 and 5, between the outer width H2 of the elastic material 2 when not compressed, the bulged outer width H2 of the elastic material 2 when compressed, and the inner diameter of the film core 3. , ■≦D<H2. That is, in FIG. 5, when (11> is not compressed), the film core 3 can be easily attached to and detached from the film core attachment part of the shaft core 1 into which the elastic material 2 is fitted, and (2). During compression, the film core 3 is pressed against the bulging elastic material 2 at an arbitrarily set mounting position relative to the film core mounting portion, thereby fixing it to the shaft core 1. From this state, the film core 3 To take out the core 3, rotate the stopper 5 so that it stands upright, and make the elastic material 2 non-compressible as shown in Fig. 5 (1). When a material is used, the bulge is made uniform around all four circumferences, and when the elastic material is arranged alternately with the inelastic metal rings 4.4, the bulge of the elastic material is made even more uniform. However, in the present invention, it is sufficient to provide the elastic material in a form that swells at least when compressed.As an example, as shown in FIG. It is conceivable to form the part that contacts the elastic material 2 into a tapered shape so that the tapered part causes the elastic material 2 to bulge outward when compressed.
It goes without saying that any other known means may be used to expand the bullet material during compression.

(Effects of the Invention) As described above, the present invention includes fitting an elastic material into the film core mounting portion of the shaft core, mounting the film core at that location, and further compressing the elastic material in the axial direction. What is the outer width of the elastic material when it is not compressed, and what is the outer width of the elastic material when it is compressed? External bulge width H
2, and between the inner diameter stoppers of the film core: old ≦
Since the film core is arranged so that D<H2, it is very convenient that the film core can be fixed to the shaft core at an arbitrarily set mounting position with respect to the film core mounting portion of the shaft core. Furthermore, since the fixation is brought about by pressure contact using the bulging elastic material, it has excellent effects such as being able to avoid the phenomenon of looseness occurring during engagement, which is the case with conventional ones.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a film core fixing device related to unreleased s+jc, Fig. 52 is an external perspective view with the film core removed, Fig. 3 is a view showing the stopper used in the present invention, □ 4th The figure shows a state in which an elastic material is fitted to the film core cover portion of the shaft core, FIG. 5 is a longitudinal sectional view of the present invention, and FIG. 6 is another embodiment diagram corresponding to FIG. 4. . 1...Axle core 2...Elastic material 3...Film core D...Inner diameter of film core...Outer width H2...Bulging outer width Patent applicant Fukazawa - Male agent Patent attorney Masazumi Mori 0 Figure 1 Figure 2 Ward 0 Fusun r Group 5 (2) (1) Figure (2)

Claims (1)

[Claims] At the same time as fitting an elastic material to the film core attachment part of the shaft core, attaching a film core to that part, and further...
The elastic material is provided with a means for compressing the elastic material in the axial direction, and the elastic material is provided so that it expands by compression in the axial direction, and the outer width of the elastic material when uncompressed and the width when compressed are A fixing device for a film core, characterized in that the outer bulging width H2 of the elastic material and the inner diameter of the film core are arranged so that D≦D<H2.