JP3349901B2 - Band-shaped arc blade cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting apparatus for cutting a belt-shaped arc blade as an intermediate product for producing a protruding blade (three-dimensional band-shaped blade material) used in a rotary paper box punching machine into a precise size. About.

[0002]

2. Description of the Related Art If this kind of band-shaped circular blade is not cut to an exact size, it may be difficult to fit it into a fitting groove of a rotary die board after being bent three-dimensionally. Conversely, a gap is formed between the protruding blades (three-dimensional band-shaped blade material) implanted in the die board, which makes it difficult to punch a paper container with high precision. Conventionally, a skilled worker repeatedly trial and error cuts a belt-shaped arc blade to an accurate size.

[0003]

The radius of curvature of the cutting edge of the band-shaped arc blade needs to be large or small, and it is necessary to measure the arc length of the cutting edge with high accuracy for each radius of curvature, and to perform manual operations. The work of cutting by hand is extremely time-consuming and difficult for skilled workers. Therefore, an object of the present invention is to provide an apparatus that efficiently and highly accurately cuts strip-shaped circular blades having various radii of curvature.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a belt-like circular arc blade having a known radius of curvature of a cutting edge which is rotated around one axis to feed in the circumferential direction. Rotating feed means, and the belt-shaped arc blade by the rotary feeding means.
Measure the feed angle and calculate the feed angle and the radius of curvature
An arc length measuring means for calculating the arc length of the cutting edge,
The belt fed by the length of the arc by the rotary feed means
And a cutting die for cutting the circular arc blade .
In addition, the radius of curvature R of the arc of the blade edge is rotated to a known band-shaped circular blade.
Rotary transfer that rotates around one axis of the shaft and feeds in the circumferential direction
Means and a reference disk having a radius R ₀ fixed to the rotating shaft.
Of the feed circumference L ′ by the above-mentioned rotary feed means, and L ′
An arc for calculating the length L of the arc of the cutting edge by calculation of × R / R ₀
The length of the arc by the length measuring means and the rotary feed means
Cut-off mold for cutting a belt-shaped arc blade fed by L
And

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on the illustrated embodiments.

FIG. 9 shows an example of a band-shaped arc blade A cut by the cutting device according to the present invention, which is previously formed to have a known (large or small) radius of curvature R with the cutting edge 1 as the outer diameter side. I have. That is, a straight blade material in which a number of slits 2 are cut out on the inner diameter side is previously bent into a circular arc shape, and the material is bent into, for example, a two-dot chain line B by a cutting device according to the present invention.
At the desired position, and cut to the desired arc length L of the cutting edge 1.

FIG. 1 is a plan view showing an embodiment of the cutting apparatus, and FIG. 10 is a perspective view thereof. This figure 1
In FIG. 10 and FIG. 10, reference numeral 3 denotes a base, and 4 denotes a cutting die (cutting blade), which is mounted so as to reciprocate in the direction of arrow C along the guide rails 34, 34. .

Reference numeral 5 denotes a manual handle for reciprocating the die (cutting blade) 4 in the direction of the arrow C. 6
Is a feed bar rotatable around the vertical axis E. The feed bar 6 rotates the above-mentioned strip-shaped arc blade A (not shown in FIG. 1) while rotating around the vertical axis E. When giving, the guide member 7 for guiding the belt-shaped arc blade A ...
Are arranged radially around the axis E.

Reference numeral 8 denotes a belt-like arc blade A
Is a feed handle for rotating the feed bar 6 to feed the feed bar. Reference numeral 9 denotes a display unit (counter) which forms a part of the arc length measuring means G.

FIG. 2 is a perspective view of a main part of the present cutting apparatus, FIG. 3 is an enlarged view of a main part shown partially broken, and FIG. 8 is a sectional front view of the main part. In FIGS. 2, 3, 8, and 10, a chucking device 10 is provided so that the slide position can be freely determined in the longitudinal direction of the feed bar 6. The chucking tool 10 is attached to the feed bar 6 so as to fit externally, and is slidable (slidable) in the longitudinal direction of the feed bar 6.
A fixed knob 13 having a threaded rod portion 12 that is screwed into and retracted from the screw hole of the mounting base 11, a fluid pressure cylinder 14 fixed to a mounting piece 11a extending from the mounting base 11, The cylinder 14 includes a movable holding block 15 fixed to the tip of a piston rod, a fixed receiving member 16 protruding from the mounting base 11, and the like.

When the fixing knob 13 is loosened, the mounting base 11 is slidable along the longitudinal direction of the feed bar 6, so that the desired position of the feed bar 6 and therefore a predetermined distance from the axis E in FIG. The chucking device 10 can be fixed at the position の of the radius. Further, as is clear from FIG.
17 is clamped by the fixed receiving member 16 and the movable clamping block 15.

The guide members 7 described with reference to FIGS. 1 and 10 will be described. As shown in FIGS. 2, 4, 5, 6, and 8, each guide member 7 has two parallel members. And a short column 20 having a lower flange portion 19 fitted in a dovetail groove between the two rail members 18, 18, and rotatably pivotally attached to an upper end of the short column 20. V roller 21 and 2
A short post 23 having a lower flange portion 22 fitted in a dovetail between the rail members 18; a receiving roller 24 rotatably pivoted at an upper end of the short post 23 ; A pulling mechanism 25 for pulling the roller 24 toward the V roller 21 and screws 26, 26 for changing the position of the V roller 21 each time the radius of curvature R (see FIG. 9) of the belt-shaped arc blade A changes. Is done.

The pulling mechanism 25 includes a U-shaped pulling member 27 that is hooked on the short column 23 of the receiving roller 24,
A pulling screw member 30 and the like, which is rotatably mounted in the axial direction and is fixed to the horizontal screw hole 28 of the short column 20 (of the V roller 21), and a handle 29 is fixed to the base end. Have been.

The V roller 21 is disposed on the outer diameter side and the receiving roller 24 is disposed on the inner diameter side. As shown in FIGS. 5 and 6, the V roller 21 has a V-shaped groove 21a. ──Furthermore, in the illustrated example, a small slit is provided at the bottom of the groove. The receiving roller 24 has a circumferential groove (half V-shaped groove) 24 a having a horizontal receiving surface 31 and receives the inner diameter side of the belt-shaped arc blade A.

As can be seen from FIGS. 5, 6 and 1 and 10, the rollers of a number of radially arranged guide members 7 are provided.
According to 21 and 24, the band-shaped circular blade A having a known radius of curvature R (see FIG. 9) can maintain the cutting edge 1 at an accurate radius R from the axis E and maintain the horizontal circular surface of the band-shaped circular blade A. While the rear end (terminal) 17 is being pushed by the feed bar 6 and the chucking tool 10 (partially not inclined), the feed of the circular motion is given.

Next, a more detailed description will be given with reference to FIGS. 7, 8 and 10. The base end of the feed bar 6 is a vertical rotating shaft 33 pivotally supported by a bearing on a cylindrical body 32 fixed to the center of the base 3.
Is fixed. In addition, at the tip of the feed bar 6, O
When the feed bar 6 grips the rear end of the band-shaped arc blade A to give an arc-shaped feed with an N-OFF freely movable magnet 35 attached, the magnet 35 is turned off and the upper surface of the base 3 is turned off. When the feed is completed by a predetermined dimension (angle) (by a method described later), the magnet 35 is manually (or electrically) turned ON, and is fixed to the base 3 by suction.
This prevents blurring during subsequent cutting (by the cutting die 4).

Next, the rotation feed means M will be described. A wheel 36 with meshing teeth is provided below the rotation shaft 33.
A worm gear 38 is fixed to the other end of the horizontal drive shaft 37 rotated by the feed handle 8. The mesh between the worm gear 38 and the wheel 36 causes the horizontal shaft of the feed handle 8 to rotate. The rotation around the center is converted into the rotation around the vertical axis, and the rotation shaft 33 and the feed bar 6
Rotating around the axis E, the belt-shaped arc blade A has a large number of rollers 2.
A circular motion (feed) is given while being guided (guided) at 1, 24.

The cutting apparatus according to the present invention includes a measuring means G for measuring the arc length L of the cutting edge 1 of the strip-shaped circular blade A. The measuring means G will be described below. 7, 8 and 10, reference numeral 39 denotes a reference disk (having a predetermined value R ₀ ) fixed to the lower end of the rotating shaft 33, and reference numeral 40 denotes a circumference when the reference disk 39 rotates. This is a measuring device for measuring the length L '{feed circumference}.

The display unit (counter) 9 has a built-in electric or electronic function for performing the following equation.

[0020]

(Equation 1)

Here, L 'is the circumference of the reference disk 39 measured by the measuring device 40, _R0 is the radius of the reference disk 39, and R is a belt-like arc (as shown in FIG. 10). The known radius of curvature, L, of the blade A is the length of the arc of the blade edge 1 of the strip-shaped circular blade A to be obtained.

As a specific example, an extremely large number of count marks such as uneven teeth and light and dark patterns are provided on the outer periphery of the reference disk 39, and the measuring instrument 40 counts the count marks and outputs them as a pulse signal, thereby obtaining the reference circle. It is preferable to output a pulse of the feed circumference of the plate 39. Alternatively, since the radius R ₀ of the reference disk 39 is known in advance and the number of pulses per 360 ° is also known, if the measuring device 40 determines the feed angle,
I can also say. As the reference disk 39 and the measuring device 40, for example, “Magnescale” manufactured by Sony Magnescale is suitable.

The display unit (counter) 9 performs an operation of converting the number of pulses (count value) sent from the measuring device 40 by the above-described equation.
The arc length L of the cutting edge 1 can be obtained with high accuracy. The function for inputting the conversion ratio (R / R ₀ ) is a so-called pre-scale function.

As described above, in the cutting apparatus according to the present invention, the arc length measuring means G rotates the arc-shaped circular blade A having a known radius of curvature R of the arc of the cutting edge 1 around the axis E. Feeding means M
And a calculating means for calculating {ratio calculation} the feed angle or reference disk feed circumference L ′ by the rotary feed means M in accordance with the radius of curvature R. ing. (In the illustrated example, the case where the display unit 9 includes the calculation unit has been described.)

Although not shown, an encoder is used instead of the reference disk 39 and the measuring device 40 to measure (directly or indirectly) the rotation angle of the rotating shaft 33 and output the signal. May be displayed on the display unit 9 having the above-described calculation means.

The operator visually confirms the display section 9 while rotating the feed handle 8 by hand, and finds that the cutting edge 1 of the band-shaped arc blade A is
The arc length L is set with high precision, the magnet 35 is turned on to fix the belt-shaped circular blade A, and the cutting mold 4 is operated by the cylinder 42 to perform cutting (cutting). . (It is cut to a high-precision arc length L at the position of the two-dot chain line B in FIG. 9. Moreover, the two-dot chain line B is the center point O of the circle of the belt-shaped arc blade A.
Is cut to pass through. )

It is also preferable to use a motor instead of the feed handle 8 and control this motor in accordance with an output signal from the above-described arc length measuring means G to perform high-precision automatic cutting (not shown). ).

The cutting die 4 is provided on a movable table 41 which can reciprocate along guide rails 34 (as shown in FIGS. 7, 8 and 10), and a fluid pressure cylinder 42. The upper die moves up and down (cooperates with the lower die) to cut (cut off) the band-shaped arc blade A.

[0029]

According to the present invention, the following significant effects can be obtained by the above-described structure. (According to Claims 1 and 2) In order to form a protruding blade for a rotary die board, if it is bent and formed three-dimensionally thereafter, it is possible to obtain a very high-precision blade length, and to fit into the fitting groove of the die board. It is possible to set accurately, and finally, the quality (dimensions and shapes) of the punched paper container and the like is remarkably improved. In particular, a band-shaped arc blade A having an accurate arc length L can be efficiently manufactured relatively easily even by a skilled worker. (According to claims 1 and 2) It is automatically calculated by the arc length measuring means G and can be displayed on a digital display or the like which can be used immediately. The operation of cutting off the blade A can be easily and reliably performed. Alternatively, the feed is automatically stopped in the circumferential direction, and the automatic cutting (cutting) is also facilitated.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main part.

FIG. 3 is an enlarged view of a main part.

FIG. 4 is an enlarged plan view of a main part.

FIG. 5 is an explanatory diagram of a main part.

FIG. 6 is an enlarged explanatory view of a main part.

FIG. 7 is a left side view.

FIG. 8 is a partially cutaway front view.

FIG. 9 is an explanatory view of a belt-shaped arc blade.

FIG. 10 is a perspective view.

[Explanation of symbols]

 1 Blade edge 39 Reference disk L Arc length A Band-shaped arc blade R Radius E Axis G Arc length measuring means M Rotary feed means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23P 15/40 B21D 53/64 B21D 11/20 B23D 23/00 G01B 5/00

Claims (2)

(57) [Claims] 1. A and rotary feed means M radius of curvature R of the cutting edge 1 arc gives the feed by rotating the shaft center E around circumferentially known band arc blade A, the strip by the means M Ri該回Transfer Circle
The feed angle of the arc blade A is measured, and the feed angle and the curvature radius are measured.
A length measuring means G arc obtaining the length L of the arc of the edge 1 in operation with the R, the length of the arc at the rotary feed means M
Cut-off metal for cutting the belt-shaped arc blade A fed by L
A cutting device for a band-shaped arc blade, comprising: a mold 4 ; 2. A belt-like circle having a known radius of curvature R of the arc of the cutting edge 1.
It is rotated around the axis E of the rotating shaft 33 around the arc blade A and fed in the circumferential direction.
Rotating feed means M for providing the
Radius R ₀ Of the reference disk 39 by the rotary feeding means M
Measure the circumference L 'and measure L' × R / R ₀ The above blade is calculated by
An arc length measuring means G for obtaining the length L of the first arc;
A belt fed by the length L of the arc by the rotary feeding means M
Cutting die 4 for cutting the circular arc blade A.
And a cutting device for a belt-shaped arc blade.