JP4315645B2 - Tubular body cutting apparatus and tubular body cutting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tubular body cutting device and a tubular body cutting method for forming a plurality of ring bodies by cutting a tubular body with a predetermined width in the length direction.
[0002]
[Prior art]
In Japanese Patent Application Nos. 2000-371765 and 2001-342256, the present applicant has proposed a technique for forming a plurality of ring bodies by cutting a tubular body with a predetermined width in the length direction. As shown schematically in FIGS. 7A and 7B, this is obtained by pressing a tubular body W disposed on a cutting table a flatly with a comb-like presser plate b having a large number of slits b1. The tube-like body W is cut into a plurality of ring bodies by fixing each slit b1 and passing each round blade c2 of the cutting tool c in which the disk-like round blade c2 is arranged in parallel to the support shaft c1. .
[0003]
Although this can raise the production efficiency of the ring body to some extent, it is not sufficient, and when a ring body having a width of about 5 mm is cut, the portion of the slit b1 becomes excessive. As a result, there is a problem that the strength of the presser plate b cannot be maintained.
[0004]
Therefore, the present inventors, as schematically shown in FIG. 8, have a plurality of tubular bodies in which cutting blades e such as Thomson blades are arranged in parallel with each other, and the longitudinal direction is aligned on the cutting blades e. After fixing both ends of W with the fixture f, it has been proposed to lower the lifting platform g and thereby cut the tubular body W against the cutting blade e. In this case, even when a narrow ring body is cut, the strength of the apparatus is not impaired, and more ring bodies can be efficiently formed.
[0005]
[Problems to be solved by the invention]
However, in this case, the cut ring body is sandwiched between the cutting blades e and e, and it becomes difficult to take out. In addition, since the portion (ear portion) We of the tubular body W outside the outermost cutting blade e1 is pulled outward in the process of cutting, the cut edge h gradually opens and the cut surface becomes a distorted curved surface. The outer ring body Re becomes a defective product, and there arises a new problem to be solved that this defective product is mixed with a number of non-defective products and makes it difficult to find them.
[0006]
Therefore, the present invention facilitates the removal of the cut ring body and can prevent the outermost ring body from becoming a defective product and being mixed with a large number of non-defective products, thereby efficiently producing a high-quality ring body. An object of the present invention is to provide a tubular body cutting device and a tubular body cutting method.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 of the present application is a tubular body cutting device that forms a plurality of ring bodies by cutting a tubular body with a predetermined width in the length direction,
The base,
A cutting tool that is provided on this base and has a plurality of cutting blades with the blade portion facing upwards, in parallel with the width through a spacer,
A fixing tool for fixing both ends of a plurality of tubular bodies arranged side by side in the longitudinal direction on the cutting tool;
It consists of a lifting platform that can be cut by pressing up and down against the blade by pressing up and down the tube toward the base and pressing down the tubular body.
In addition, the cutting tool has an open space formed by the cutting blade and the spacer when the blade portion protrudes upward at a cutting height for cutting the tubular body from the upper surface of the spacer. In addition to the spacer elastic material,
The tube-shaped body is inserted into the outside of the outermost cutting blade among the parallel-cutting blades without being cut between the lifting table by lowering the lifting platform, and the length of the tubular body. The position shift prevention piece which prevents the position shift of a direction is standingly arranged, It is characterized by the above-mentioned.
[0008]
In the invention of claim 1, the cutting blade is a Thomson blade, and the cutting tool is constituted by arranging the cutting tool alternately in a recess in which the upper surface of the base is recessed, and the spacer The top surface of the base plate is substantially the same height as the top surface of the base.
[0009]
According to a second aspect of the present invention, the lifting platform presses the juxtaposed tube-like bodies through a cushioning material.
[0010]
According to a third aspect of the present invention, the spacer elastic material is a sponge-like body.
[0011]
The invention of claim 4 is a tubular body cutting method for forming a plurality of ring bodies by cutting the tubular body with a predetermined width in the length direction,
A cutting tool in which a plurality of cutting blades with the blade portions facing upwards on the base are arranged in parallel with the width through a spacer,
In addition, a spacer elastic material is disposed between the cutting blades arranged side by side and on the spacer,
Fixing both ends of a plurality of tubular bodies arranged side by side in the longitudinal direction on the cutting tool,
And cutting by pressing the tubular body by pressing down the lifting platform and pressing against the blade,
At the time of cutting, the tube-shaped body is prevented from being displaced in the length direction by inserting the tube-shaped body with a position-shift preventing piece arranged outside the outermost cutting blade among the parallel cutting blades. And
The cutting blade is a Thomson blade, and the cutting tool is configured by alternately arranging a spacer in a recess in which the upper surface of the base is recessed, and the upper surface of the spacer is disposed on the upper surface of the base. It is characterized by having approximately the same height as the top surface .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a tubular body cutting device of the present invention, and FIG. 2 is a perspective view showing a state before the tubular body is fixed.
1 and 2, a tubular body cutting device 1 includes a base 2, a cutting tool 3 provided on the base 2, and both ends of a plurality of tubular bodies W arranged side by side on the cutting tool 3. A fixing tool 5 for fixing the portion We and a lifting platform 7 that moves up and down toward the base 2 and presses and cuts the tubular body W against the cutting blade 6 of the cutting tool 3 by descending.
[0013]
In this example, the base 2 has a box shape in which the lower surface of the peripheral frame 10 that is framed in a rectangular shape is closed with a bottom plate, thereby forming a recess 12 for accommodating a cutting tool whose upper surface is recessed in the base 2. ing.
[0014]
The cutting tool 3 has a plurality of cutting blades 6 with the blade portions facing upward, and are arranged in parallel with each other at intervals corresponding to the cutting width via a spacer 13. In this example, the cutting blade 6 is a Thomson blade, and the cutting tool 3 is configured by alternately arranging the spacers 13 in the recesses 12.
[0015]
At this time, the cutting blade 6 protrudes upward at a cutting height H at which the blade portion cuts the tubular body W from the upper surface of the spacer 13, whereby the cutting blade 6 is interposed between the cutting blade 6 and the spacer 13. Is formed with an open space J. The upper surface of the spacer 13 is substantially the same as the upper surface of the base 2 .
[0016]
A spacer elastic material 15 is disposed in the void J.
The spacer elastic material 15 is formed of a sponge-like body that is easily elastically deformed in the compression direction, is compressed by a pressing force at the time of cutting, and allows the tube-like body W to enter the space J. Further, the ring body R (shown in FIG. 6) can be discharged from between the cutting blades 6 and 6 by returning from the compression by releasing the pressing force after cutting. The sponge-like body is not particularly restricted, but a closed-cell sponge rubber can be suitably used from the viewpoint of excellent restoring force. The spacer elastic material 15 is preferably formed so that the upper surface thereof is substantially the same height as the tip of the cutting edge of the cutting blade 6.
[0017]
Next, the fixture 5 is configured to narrow and fix the both ends We between the lower fixture 5L that receives the lower surfaces of both ends We of the tubular body W and the lower fixture 5L. It is comprised from the fixing tool 5U. The lower fixture 5L includes a pair of frame members 14 parallel to the cutting blade 6 and is integrally fixed to the outer surface of the peripheral frame 10, respectively.
[0018]
The frame member 14 protrudes upward beyond the upper surface of the base 2, and a plurality of semicircular holding recesses 14 </ b> A for receiving both end portions We of the tubular body W are formed on the upper edge portion thereof. They are arranged side by side with an interval. Therefore, the lower fixture 5L can arrange a plurality of tubular bodies W with their longitudinal directions aligned between the holding recesses 14A facing each other. At this time, it is preferable that the holding recess 14 </ b> A has the lower edge Ae formed at substantially the same height as the tip of the cutting edge of the cutting blade 6.
[0019]
Here, “substantially the same height” in this specification means a case where the difference in height is within 2 mm.
[0020]
Further, the upper fixture 5U is a rectangular peripheral frame body 17 including a side frame member 16 that overlaps the frame member 14 in the vertical direction. In this example, a hinge 18 is provided at one end of the frame member 14 in the length direction. The case where it is put on butterfly via is illustrated. A semicircular holding recess 16A is formed at each lower edge of the side frame member 16 at a position that matches the holding recess 14A. In the closed state in which the frame member 14 and the side frame member 16 overlap each other, the fixture 5 can fix both end portions We of the tubular body W between the holding recesses 14A and 16A by narrow pressure. The fixture 5 is provided with a lock fitting (not shown) for locking the upper and lower fixtures 5U and 5L in the closed state.
[0021]
The lifting platform 7 is disposed in the lumen of the peripheral frame body 17 (upper fixture 5U) in the closed state, and descends toward the base 2 to cut the tubular body W into a cutting blade. Cut against 6 blades. At this time, the thickness of the lifting platform 7 is made sufficiently larger than the height from the upper surface of the surrounding frame body 17 to the tip of the cutting edge of the cutting blade 6. In this example, the lifting platform 7 includes a hard main portion 7A made of, for example, a wood material, and a soft cushioning material 7B made of, for example, a synthetic resin material, which is exchangeably disposed on the lower surface of the main portion 7A. Accordingly, the cutting is reliably performed and at the same time, the cutting blade 6 is prevented from being damaged. The elevator 7 is raised and lowered by a press machine (not shown) to which the tubular body cutting device 1 is attached.
[0022]
Further, in the present invention, the tubular body W is inserted into the outer side of the outermost cutting blade 6E of the cutting blades 6 without being cut between the lifting table 7 by the lowering of the lifting table 7. As a result, a position shift prevention piece 19 for preventing the position shift in the length direction of the tubular body W is provided upright.
[0023]
In the present example, the misalignment prevention piece 19 is formed of a so-called rotary blade whose tip of the blade has a wave shape (including a zigzag shape and a sawtooth shape), as shown in FIG. For example, the distance L is set to be about 1 to 2 mm lower than the tip of the blade portion.
[0024]
Here, as shown in FIG. 4, the cutting blade 6 is inserted into the tubular body W and cut by the depression of the tubular body W accompanying the lowering of the lifting platform 7. At this time, the misalignment prevention piece 19 is similarly inserted into the tubular body W, and the tube portion Wa between the misalignment prevention piece 19 and the cutting blade 6E is prevented from being displaced in the length direction. it can. Therefore, the cut edge h1 of the cutting blade 6E is not opened in the cutting process, and the cutting blade 6E can be cut on a clean flat surface without distortion.
[0025]
Note that the cut h2 of the misalignment prevention piece 19 is opened during the cutting process, so that the cut surface is a distorted curved surface . However, the tube-like body W is not completely cut off because the position shift prevention piece 19 is composed of a rotary blade and the tip of the blade portion is lower than the cutting blade 6 so that uncut portions are generated. Therefore, it is ensured that the tube portion Wa having a distorted cut surface remains in one piece without being separated from the end portion We and is mixed with other ring bodies R to cause contamination. Can be prevented.
[0026]
The misalignment prevention piece 19 may be a Thomson blade whose tip is set lower than the cutting blade 6. Depending on the wave shape of the cutting edge, the rotary blade may be arranged at the same height as the cutting blade 6, and a tubular body W such as a needle alignment body in which a plurality of needles are arranged in one or more rows can be inserted. Various types can be used as long as they are not cut (not cut).
[0027]
Further, in the case of the member 21 that is not inserted into the tubular body W, as shown in FIG. 5, the tubular body W is pulled by the narrow pressure by the member 21, so that the cut edge h1 of the cutting blade 6E is opened, The effect of the present invention is not achieved.
[0028]
6A to 6C show a process of cutting the tubular body W into a plurality of ring bodies R by the tubular body cutting device 1. As shown in the figure, after fixing both ends We of the plurality of tube-like bodies W arranged on the cutting tool 3 by the fixture 5, the tube-like body is pressed by the cutting blade 6 by lowering the lifting platform 7 and cut. To do.
[0029]
At this time, by disposing the misalignment prevention piece 19 on the outermost side, a large number of non-defective ring bodies R with no distortion in the cut surface are efficiently formed at a time between the cutting blades 6 and 6. In addition, the tube portion Wa between the misalignment preventing piece 19 and the cutting blade 6E, where the cut surface is distorted, is not separated from the end portion We and is mixed with the non-defective ring body R to become contamination. Can be prevented.
[0030]
The tubular body cutting device 1 may be mounted on a press machine so that the base 2 side can be moved up and down, and the base 2 may be raised toward the lift 7. Further, the tubular body cutting device 1 may be mounted on a press machine by turning it upside down.
[0031]
As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.
[0032]
【The invention's effect】
Since the present invention is configured as described above, it is easy to take out the cut ring body and prevent the outermost ring body from becoming a defective product and being mixed with many good products. A ring body can be produced efficiently.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a tubular body cutting device according to the present invention.
FIG. 2 is a perspective view showing a state before the tubular body is fixed.
FIG. 3 is a side view showing a misalignment prevention piece.
FIG. 4 is a diagram for explaining the function and effect of the misalignment prevention piece.
FIG. 5 is a diagram illustrating a problem when a member other than a misalignment prevention piece is used.
6A to 6C are diagrams showing a cutting process by a tubular body cutting apparatus.
FIGS. 7A and 7B are diagrams for explaining the problems of the prior art. FIGS.
FIG. 8 is a diagram showing a problem to be solved by the present invention.
[Explanation of symbols]
2 Base 3 Cutting tool 5 Fixing tool 6 Cutting blade 6E Outermost cutting blade 7 Lifting platform 7B Buffer material 12 Recess 13 Spacer 15 Spacer elastic material 19 Displacement prevention piece H Space R Ring body W Tube shape Body We both ends

Claims (4)

A tubular body cutting device that forms a plurality of ring bodies by cutting a tubular body with a predetermined width in the length direction,
The base,
A cutting tool that is provided on this base and has a plurality of cutting blades with the blade portion facing upwards, in parallel with the width through a spacer,
A fixing tool for fixing both ends of a plurality of tubular bodies arranged side by side in the longitudinal direction on the cutting tool;
It consists of a lifting platform that can be cut by pressing up and down against the blade by pressing up and down the tube toward the base and pressing down the tubular body.
In addition, the cutting tool has an open space formed by the cutting blade and the spacer when the blade portion protrudes upward at a cutting height for cutting the tubular body from the upper surface of the spacer. In addition to the spacer elastic material,
The tube-shaped body is inserted into the outside of the outermost cutting blade among the parallel-cutting blades without being cut between the lifting table by lowering the lifting platform, and the length of the tubular body. Set up a misalignment prevention piece to prevent misalignment in the direction ,
The cutting blade is a Thomson blade, and the cutting tool is configured by alternately arranging a spacer in a recess in which the upper surface of the base is recessed, and the upper surface of the spacer is disposed on the upper surface of the base. A tube-shaped body cutting device characterized by having approximately the same height as the upper surface . 2. The tubular body cutting device according to claim 1 , wherein the lifting platform presses the juxtaposed tube-shaped bodies through a cushioning material. The tube-like body cutting device according to claim 1, wherein the spacer elastic material is a sponge-like body. A tubular body cutting method for forming a plurality of ring bodies by cutting a tubular body with a predetermined width in the length direction,
A cutting tool in which a plurality of cutting blades with the blade portions facing upwards on the base are arranged in parallel with the width through a spacer,
In addition, a spacer elastic material is disposed between the cutting blades arranged side by side and on the spacer,
Fixing both ends of a plurality of tubular bodies arranged side by side in the longitudinal direction on the cutting tool,
And cutting by pressing the tubular body by pressing down the lifting platform and pressing against the blade,
At the time of cutting, the tube-shaped body is prevented from being displaced in the length direction by inserting the tube-shaped body with a position-shift preventing piece arranged outside the outermost cutting blade among the parallel cutting blades. And
The cutting blade is a Thomson blade, and the cutting tool is configured by alternately arranging a spacer in a recess in which the upper surface of the base is recessed, and the upper surface of the spacer is disposed on the upper surface of the base. A tubular body cutting method characterized by having a height substantially equal to that of the upper surface .

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