JPS597330Y2 - paper bobbin - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a paper bobbin.

Generally, metal bobbins made of aluminum or iron are used for winding bobbins of synthetic fibers, mainly nylon-based, ester-based, etc. However, when the thread is exported, it is difficult to recover the bobbins, and textile processing companies have to use bobbins on hand. If there is a shortage and the product cannot be collected, the exporter will be responsible for paying the deposit, but metal bobbins are expensive and there will be a large economic loss due to collection work, the burden of the deposit, and increased inventory for processors.

Paper bobbins were developed to eliminate this drawback, but as shown in Figure 5, conventional paper bobbins have two cutouts a and a communicating in the diametrical direction on the bottom to hold the spindle. Because of the shape of the metal bobbin, the generally used spindle for metal bobbins as shown in Fig. A separate spindle had to be prepared.

In addition, as another paper bobbin, as shown in Fig. 6, a square tube part C is installed in the center of the lower end of the paper tube, and the lower end peripheral flange d of this square tube part C is fitted onto the lower end surface of the paper tube. At the same time, the lower corner opening e' of the bowl-shaped part e is fitted into the square tube part C, and the bowl-shaped part e is fixed to the inner peripheral surface of the paper tube by nailing or the like. As mentioned above, it goes without saying that a metal bobbin spindle cannot be used, and since the rectangular tube part C is arranged in the center part away from the inner circumferential surface of the paper tube, the flange part that fixes this rectangular tube part C cannot be used. d and the bowl-shaped part e are required, which not only complicates the structure, but also makes it difficult to attach the bowl-shaped part e to the inner circumferential surface of the paper tube. Since they are spaced apart from each other, and there are only one or two places that are closely fitted with the rotational drive spindle, there is a problem that runout occurs when the spindle is rotationally driven and winding cannot be performed at high speed rotation.

In order to eliminate these problems, the present invention uses a paper bobbin in which spindles are directly and closely fitted in at least three locations on the inner circumferential surface, and the spindle for metal bobbins is configured to be rotatably driven. This is what we provide.

An embodiment of the present invention will be explained with reference to the drawings. In Figs. 1 and 2, 1 is a paper tube body, and only the inner layer at the lower end thereof is removed by a predetermined thickness to form an enlarged hole with a larger diameter than the inner circumferential surface 1a. 2, and a ring body 3 made of resin or the like is fitted into the enlarged hole 2 with a presser.

The inner diameter of the ring body 3 is larger than the inner circumferential diameter of the paper tube body 1, and spindle locking surfaces 4, 4, 4 are formed on the inner circumferential surface 3. be.

Reference numeral 5 denotes a bearing fitted into the middle portion of the inner peripheral surface of the paper tube body 1, and numeral 6 denotes a cap fitted into the top inner peripheral surface of the paper tube body 1.

Figures 3 and 4 show spindles for metal bobbins.
It has a large-diameter drive part 7 at the lower part, and a shaft part 9 is protruded from the center of the upper part of the drive part 7 through a fitting part 8 having a smaller diameter than the drive part 7. Reference numeral 7 has driving engagement surfaces 7a formed on three sides of its outer peripheral surface.

The paper tube body 1 is configured to be rotationally driven by this metal bobbin spindle, and the enlarged hole 2 of the paper tube body 1
The inner circumferential surface of the ring body 3 fitted into the paper tube body 1 is shaped so that the driving part 7 of the spindle is directly and closely fitted thereinto.
The fitting portion 8 of the spindle is directly and closely fitted to the inner circumferential surface of the lower part of the spindle, and the shaft portion 9 of the spindle is fitted directly and closely to the bearing 5, respectively.

Then, the paper tube body 1 is inserted into this spindle, and the rotation of the spindle is controlled via the locking surface 4 of the ring body 3 of the paper tube body 1 that is engaged with the retaining surface 7a of the drive section 7 of the spindle. It is transmitted to the paper tube body 1 and winds the yarn.

In this way, in the present invention, only the inner layer of the lower end of the paper tube body 1 is removed by a predetermined thickness to form the enlarged hole 2, and the driving part 7 of the metal bobbin spindle is directly and closely fitted into this enlarged hole 2. At the same time, a bearing 5 in which the shaft portion 9 of the spindle is directly and closely fitted is fitted into the middle part of the inner circumferential surface of the paper tube body 1, and a bearing 5 is fitted into the lower inner circumference of the paper tube body 1. Although the paper bobbin is characterized in that the lower fitting part 8 of the spindle is directly and closely fitted to the surface of the paper bobbin, there is no need to separately hold a spindle for the paper bobbin. The yarn can be wound around the paper tube body 1 by using the conventional spindle for metal bobbins without any modification, and the lower end of the paper tube body 1, which is rotationally driven by the spindle, is connected to its inner periphery. The ring body 3, in which the spindle driving part 7 is directly and closely fitted, is fitted into the enlarged hole 2, which has been shaped by removing the part, so the structure is extremely simple and the ring body 3 can be easily attached. It has a structure that allows for
is directly fitted into the lower end enlarged hole 2 of the paper tube body 1, so the fitting part is strong, and furthermore, this ring body 3, the inner circumferential surface 1a of the paper tube body 1, and the paper tube body 1 The bearing 5 provided in the middle part of the spindle, the driving part 7, the fitting part 8 and the shaft part 9
Since these are directly and closely fitted to each other, the spindle is accurately inserted into the center of the paper tube body 1, and the two are firmly integrated, so that the paper tube body 1 can rotate at high speed without swinging. It is possible to wind the material by

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing an embodiment of the present invention, Fig. 2 is a bottom view thereof, Fig. 3 is a partially cutaway front view of a spindle for metal bobbin, Fig. 4 is a plan view thereof, and Fig. 5 This figure and FIG. 6 are cross-sectional views of the main parts of a conventional paper bobbin. 1...Paper tube body, 2...Enlarged hole, 3...Ring body,
4... Spindle locking surface, 5... Bearing, 7... Spindle drive part, 8... Fitting part, 9... Shaft part.

Claims (1)

[Scope of utility model registration request] Only the inner layer of the lower end of the paper tube body 1 is removed by a predetermined thickness to enlarge the hole 2.
Into this enlarged hole 2 is fitted a ring body 3 into which a driving part 7 of a metal bobbin spindle is directly and closely fitted, and at the same time a shaft part 9 of the spindle is inserted into the middle part of the inner circumferential surface of the paper tube body 1. A bearing 5 is directly and closely fitted into the paper tube body 1.
A paper bobbin characterized in that the lower fitting part 8 of the spindle is directly and closely fitted to the lower inner circumferential surface of the paper bobbin.