JP3595299B2 - Slitter round blade mounting device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a slitter for slitting a web material such as paper or plastic film, and more particularly to a device for attaching a round blade.
[0002]
[Prior art and its problems]
In a slitter for slitting a web material such as paper and a plastic film, the web material is often slit by a round blade. In this case, usually, a center hole is formed in the round blade, the support shaft passes through the center hole of the round blade, the center hole is fitted to the outer peripheral surface of the support shaft, and the support shaft is supported by a bearing and rotatably guided. Is done. Further, the web material is fed in a certain direction, contacts the edge of the round blade, and the friction causes the round blade and the spindle to rotate. Thereby, the web material is slit.
[0003]
However, the round blade is only fitted on the outer peripheral surface of the spindle, and when the round blade and the spindle rotate due to friction of the web material, the round blade does not always rotate integrally with the spindle. It is not rare that the round blade slides along the outer peripheral surface of the spindle and runs idle. For this reason, there was a problem that the support shaft was shaved and damaged by the round blade. The shaft may be broken by the round blade.
[0004]
[Object of the invention]
Accordingly, an object of the present invention is to prevent a spindle from being cut and damaged by a round blade in a round blade mounting device for a slitter.
[0005]
Configuration of the Invention
According to this invention, the center hole is formed in the round blade, and the support shaft passes through the center hole of the round blade. Further, an axial groove is formed on the outer peripheral surface of the support shaft. The axial groove has a bottom surface with an arc-shaped cross section, and the center hole has a shape corresponding to the axial groove of the support shaft, and is fitted into the axial groove of the support shaft. The support shaft has a flange for contacting the round blade. Further, a thread groove is formed on the outer peripheral surface of the spindle, the nut is screwed into the thread groove, pressed against the round blade, the round blade is sandwiched between the nut and the flange, and the round blade is fixed by the nut and the flange, The round blade rotates integrally with the support shaft.
[0006]
In a preferred embodiment, a plurality of axial grooves are formed at angular intervals around the support shaft, and the central hole is shaped to correspond to each axial groove and is fitted into each axial groove.
[0008]
[Explanation of the embodiment]
Hereinafter, embodiments of the present invention will be described.
[0009]
FIG. 1 shows an apparatus according to the present invention. This device is a round blade mounting device of a slitter for slitting a web material 1 such as paper or plastic film, and has a spindle 2. The support shaft 2 is for mounting the round blade 3 and is combined with an arm 4. As shown in FIG. 2, a bearing 5 is provided on the arm 4, and the support shaft 2 is supported by the bearing 5 and is rotatable. Has been guided to. Further, the arm 4 and the holder 7 are connected by the bolt 6, and the arm 4 is supported by the holder 7 and the bolt 6, and can swing around the bolt 6. Further, a slot 8 is formed in the arm 4 around the bolt 6, and a clamp handle 9 penetrates the slot 8 and is screwed to the holder 7, and swings the arm 4 around the bolt 6 to a desired angle. In the position, the arm 4 can be tightened and fixed by the clamp handle 9. The bolt 6 and the clamp handle 9 can be withdrawn from the arm 4 and the holder 7, whereby the arm 4 can be removed.
[0010]
Regarding the relationship between the round blade 3 and the support shaft 2, as shown in FIGS. 3, 4, and 5, a center hole 10 is formed in the round blade 3, and the support shaft 2 has a flange 11 that contacts the round blade 3. And penetrates the center hole 10 of the round blade 3. The flange 11 has a smaller diameter than the round blade 3. Further, an axial groove 12 is formed on the outer peripheral surface of the support shaft 2 between the tip of the support shaft 2 and the flange 11. The axial groove 12 has a bottom surface 13 having an arc-shaped cross section. The center hole 10 has a shape corresponding to the axial groove 12 of the support shaft 2, and is fitted to the axial groove 12 of the support shaft 2. Further, in this embodiment, a plurality of axial grooves 12 are formed at angular intervals around the support shaft 2, and the center hole 10 has a shape corresponding to each axial groove 12, and is formed in each axial direction. The groove 12 is fitted. For example, three axial grooves 12 are formed at an angular interval of 120 °, and the center hole 10 of the round blade 3 is fitted into each axial groove 12 at the tip of the support shaft 2. In this state, the round blade 3 is pushed in, and the round blade 3 moves along the axial groove 12 of the support shaft 2, reaches the flange 11, and comes into contact with the flange 11.
[0011]
Further, in this device, a screw groove 14 is formed on the outer peripheral surface of the support shaft 2, and a nut 15 is screwed into the screw groove 14 of the support shaft 2 and pressed against the round blade 3. It is sandwiched between the flanges 11. Therefore, the round blade 3 is fixed by the nut 15 and the flange 11.
[0012]
Regarding the relationship between the round blade 3 and the arm 4, the round blade 3 has its edge 16 and is arranged parallel to the arm 4, and on one side of the arm 4, the edge 16 projects from the arm 4. Further, a flat surface 17 is formed on one side of the arm 4, and after the arm 4 is detached, the flat surface 17 is brought into contact with the floor surface, and the arm 4 can be stood upright in a stable state and stored. Furthermore, a semi-circular cover 18 is integrated into the arm 4 and is pivotably guided so that the cover 18 can be swiveled around the round blade 3 to cover and protect the edge 16 with the cover 18.
[0013]
In this device, the round blade 3 is attached to each of the plurality of arms 4. Further, in the plurality of holders 7, the arms 4 are combined and supported, respectively, and the arms 4 are arranged at intervals. Further, for example, the web material 1 is fed along the outer peripheral surface of the roller 19, and in each arm 4, the arm 4 and the round blade 3 are arranged parallel to the feeding direction X of the web material 1. Therefore, the web material 1 contacts the edge 16 of the round blade 3, and the friction causes the round blade 3 and the support shaft 2 to rotate. Thereby, the web material 1 is slit.
[0014]
In the case of this device, the center hole 10 of the round blade 3 is fitted in the axial groove 12 of the support shaft 2, and when the round blade 3 and the support shaft 2 rotate due to friction of the web material 1, the round blade 3 is supported. The shaft 2 is constrained by an axial groove 12 and rotates integrally with the support shaft 2. Therefore, the round blade 3 does not idle along the outer peripheral surface of the support shaft 2, and the support shaft 2 is scraped by the round blade 3, and is not damaged or broken.
[0015]
In addition, in the case of this device, it is necessary to form the axial groove 12 on the outer peripheral surface of the support shaft 2, but the processing is easy. As described above, the axial groove 12 has the bottom surface 13 having an arc-shaped cross section. As shown in FIG. 6, the axial groove 12 can be formed and processed by the rotary cutter 20, and the cost is low. ,No problem.
[0016]
【The invention's effect】
As described above, according to the present invention, when the round blade 3 and the support shaft 2 rotate due to the friction of the web material 1, the round blade 3 is restrained by the axial groove 12 of the support shaft 2, and It rotates together. Therefore, the round blade 3 does not idle along the outer peripheral surface of the support shaft 2, and the support shaft 2 is scraped by the round blade 3, and is not damaged or broken. Processing of the axial groove 12 of the support shaft 2 is also easy, and the intended purpose can be achieved.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
FIG. 2 is a sectional view of the apparatus of FIG.
FIG. 3 is an end view of the support shaft shown in FIG. 2;
FIG. 4 is an end view showing a state where a nut in FIG. 3 is removed.
FIG. 5 is an end view showing a state where a round blade of FIG. 4 is removed.
FIG. 6 is an explanatory view showing a state in which an axial groove of the support shaft in FIG. 5 is formed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Web material 2 Support shaft 3 Round blade 10 Center hole 12 Axial groove 13 Bottom surface 14 Screw groove 15 Nut

Claims (2)

A center hole is formed in the round blade, a support shaft passes through the center hole, an axial groove is formed on an outer peripheral surface of the support shaft, the axial groove has a bottom surface having an arc-shaped cross section, and The center hole has a shape corresponding to the axial groove, is fitted in the axial groove, the spindle has a flange for contacting the round blade, and a screw groove is formed on the outer peripheral surface of the spindle. Formed, a nut is screwed into the thread groove and pressed against the round blade, the round blade is sandwiched between the nut and the flange, and the round blade is fixed by the nut and the flange. The slitter is configured to rotate integrally with the support shaft. A plurality of the axial grooves are formed at angular intervals around the support shaft, and the center hole has a shape corresponding to each axial groove, and is fitted into each axial groove. The device of claim 1, wherein

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