JPH0839482A - Cloth cutting device - Google Patents

Abstract

PURPOSE:To provide a cloth cutting device capable of easily cutting a cloth even without increasing a moving speed of a blade. CONSTITUTION:A pair of band-shaped blades 1, 2 are superposed along the lengthwise direction, and when the one band-shaped blade 1 is moved in an upper direction along an arrow mark B, the other band-shaped blade 2 is moved in a lower direction along the arrow mark B, on the other hand, when moved the one band-shaped blade l in the lower direction, to move the other band- shaped blade 2 in the upper direction. That is, each band-shaped blade 1, 2 is always moved in the respective direction opposite to each other. When a cloth 3 is pressed to these band-shaped blades 1, 2, this cloth 3 is cut so as to tear it off by each band-shaped blade 1, 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting cloth.

[0002]

2. Description of the Related Art Conventionally, in this type of cutting device, one blade is moved and the blade is pressed against the cloth to cut the cloth.

FIG. 16 shows an example thereof. Here, a U-shaped frame 101 is fixed to a table 102, and four pulleys 103, 104, 105, 106 are provided.
Is supported at four corners of the frame 101, the annular blade 107 is bridged over each pulley, and one pulley 103 is rotated to move the annular blade 107 in the direction of the arrow. The cloth is placed on the table 102 on each pulley 103, 10
It is pressed against the blade 107 between 6 and cut.

FIG. 17 shows another example of the conventional device, in which the blade 111 is vertically moved by the crank 113 while being sandwiched between the guide members 112. This blade 11
The cloth can be cut by pressing 1 onto the cloth.

[0005]

However, in the above-mentioned conventional cutting device, since only one blade is moved and this blade is pressed against the cloth, a thick cloth is cut or many stacked cloths are cut at a time. When cutting, there is a problem that the moving speed of the blade has to be increased and frictional heat generated between the blade and the cloth is increased. In particular, when the chemical fiber, which is sensitive to heat, is cut, the chemical fiber melts.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain a cloth cutting device which can easily cut cloth without increasing the moving speed of the blade.

[0007]

In order to solve the above-mentioned problems, in the present invention, the pair of strip-shaped blades are opposed to each other while maintaining a state in which the pair of strip-shaped blades are superposed along the longitudinal direction. Is moving in the direction of.

[0008]

According to the present invention, the pair of band-shaped blades are moved in opposite directions while being in contact with each other along the longitudinal direction. Therefore, when the cloth is pressed against these band-shaped blades, the cloth is cut so as to be torn by the band-shaped blades which are moved in opposite directions.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings.

First, the basic principle of the present invention will be briefly described. As shown in FIG. 1, the pair of strip-shaped blades 1 and 2 overlap each other along the longitudinal direction, and one strip-shaped blade 1 is indicated by an arrow B.
When moving upwards, the other strip-shaped blade 2 moves downward along the arrow B, and when moving one strip-shaped blade 1 downwards, the other strip-shaped blade 2 moves upwards. Moving. That is, the strip-shaped blades 1 and 2 are always moved in opposite directions. When the cloth 3 is pressed against these strip-shaped blades 1, 2, the cloth 3 is
Cut as if torn by two. 2 like this
When the cloth is torn and cut by the one band-shaped blade, the cloth can be easily cut without particularly increasing the moving speed of each band-shaped blade.

Further, it is not necessary to particularly increase the moving speed of each band-shaped blade not only for tearing and cutting the cloth, but for example, when the moving speed of each band-shaped blade is set to 10 m / sec. The relative speed between the edges of the strip blade is 20
This is because it becomes m / sec. That is, a pair of band-shaped blades having a moving speed of 10 m / sec can provide a sharpness equivalent to that of a single blade having a moving speed of 20 m / sec.

For this reason, the frictional heat between each strip-shaped blade and the cloth does not have to be high, and even chemical fibers do not melt. It has also been found that many stacked fabrics, even wet ones, are easily cut.

2 and 3 show an embodiment of a cutting device according to the present invention. FIG. 2 shows a cross section when viewed from the front, and FIG. 3 shows when viewed from the side. The cross section of FIG.

In the apparatus of this embodiment, the upper casing 11 and the lower casing 21 are connected via the guide member 31.

A handle 12 is provided outside the upper casing 11.
And the handle 13 is fixed. In addition, the upper housing 11
A motor 14 is fixed inside the motor, and a large pulley 15 is connected to a rotating shaft of the motor 14. Further, a support 16 is fixed inside the upper casing 11, and the two small pulleys 1 are attached to the support 16.
7, 18 are pivotally supported.

On the other hand, four rollers 22 are attached to the bottom of the lower casing 21. A support 23 is fixed inside the lower housing 21.
A large pulley 25 and two small pulleys 26 and 27 are pivotally supported on the shaft 3.

The band-shaped blade 41 is annular as shown in FIG. 4, and is bridged between the large pulley 15 of the upper casing 11 and the large pulley 25 of the lower casing 21. The strip-shaped blade 41 is provided on the upper casing 11 side between the two small pulleys 17 and 18 and on the lower casing 21 side between the two small pulleys 26 and 27 so as to form a groove inside the guide member 31. Passing through.

The band-shaped blade 41 has a cross section shown in FIG.
As shown in Figure 3, it is crescent-shaped, with the inner surface of the ring being concave and the outer surface being convex. Here, since the band-shaped blade 41 has a crescent-shaped cross section, between the small pulley 17 on the left side of the upper casing 11 and the small pulley 26 on the left side of the lower casing 21,
Between the small pulley 18 on the right side of the upper casing 11 and the small pulley 27 on the right side of the lower casing 21, the belt-shaped blade 41 is curved to the right,
The band-shaped blade 41 warps to the left. Therefore, at substantially the center between the upper housing 11 and the lower housing 21, the respective facing portions of the strip-shaped blade 41 approach each other and overlap in the longitudinal direction. That is, the pair of strip-shaped blades overlap each other in the longitudinal direction.

Further, since the band-shaped blade has a crescent-shaped cross section, the transport path of the band-shaped blade can be made small, which is effective for downsizing the entire apparatus. This is because a crescent-shaped band-shaped blade with a cross section has its own property of bending slightly. In comparison with this, the band-shaped blade having a flat cross section always tries to keep a large radius even when it is bent, so that it becomes difficult to make the device compact when the band-shaped blade having a flat cross section is applied.

When the motor 14 is rotated, the large pulley 15 rotates in the direction of the arrow C as shown in FIG. 6, and accordingly, the large pulley 15 near the center between the upper casing 11 and the lower casing 21. The respective facing portions of the band-shaped blade 41 move upward and downward. At this time, as shown in FIG.
When the cloth 32 is pressed against the respective facing portions of the strip blade 41, the cloth 32 is torn and cut up and down by the respective facing portions of the strip blade 41.

FIG. 8 shows a mode in which the apparatus of this embodiment is used. In the figure, the lower housing 21
Since the four rollers 22 are attached to the bottom of the device, if the handle 12 and the handle 13 of the upper housing 11 are held and pushed rightward, the device advances rightward. At this time, if the cloth 33 is guided onto the lower housing 21, the cloth 33 is gradually cut as the apparatus advances.

By the way, in the conventional apparatus shown in FIG. 17, since the blade 111 is moved up and down by the crank 113, vibration is generated. On the other hand, in the apparatus of this embodiment, the annular belt-shaped blade 41 is used for the two large rollers 15, 2.
Since the belt-shaped blade 41 is rotated over the bridge 5,
Vibration does not occur. Therefore, the device of this embodiment is easier to operate as compared with the conventional device shown in FIG.
There is an advantage that the cloth can be cut accurately.

9 and 10 show another embodiment of the cutting device according to the present invention. FIG. 9 shows a cross section when viewed from the front side, and FIG. 10 shows a side view. The cross section is shown.

In the apparatus of this embodiment, the upper casing 51,
The lower housing 61 is connected via a guide member 71.
A sandwiching plate 72 is fixed in the middle of the guide member 71, and the table 7 is interposed between the sandwiching plate 72 and the lower housing 61.
By inserting the guide member 71 into the slot 75 of the table 73 so as to sandwich the device 3,
It is attached to 3.

A support 52 is fixed to the upper casing 51, and a large pulley 53 and two small pulleys 54 and 55 are pivotally supported on the support 52.

On the other hand, in the lower housing 61, a motor 62 is fixed, and a large pulley 63 is attached to the rotating shaft of the motor 62.
Are connected. A support 64 is fixed, and two small pulleys 65 and 66 are axially supported by the support 64.

An annular belt-shaped blade 76 is bridged between the large pulley 53 of the upper casing 51 and the large pulley 63 of the lower casing 61. The annular band-shaped blade 76 is interposed between the small pulleys 54 and 55 of the upper housing 51, and the lower housing 6
The small pulleys 65 and 66 of No. 1 pass through the groove inside the guide member 71.

Further, like the device shown in FIGS. 2 and 3, the annular band-shaped blade 76 has a crescent-shaped cross section and has a concave surface on the inner side of the ring and a convex surface on the outer side. Therefore, in the vicinity of the center between the upper casing 51 and the lower casing 61, the respective opposing portions of the strip-shaped blade 76 are in close contact with each other.

In such a structure, the motor 62 is rotated to rotate the ring-shaped blade 76 in advance, and the cloth is pressed against the opposing portions of the belt-shaped blade 76 on the table 73. Is cut as if torn.

By the way, in the conventional apparatus shown in FIG. 16, the ease of performing the work is determined by the depth of the U-shaped frame 101. On the other hand, in the device of this embodiment, since there is nothing that corresponds to the pocket of the conventional device, it can be said that the work is very easy to perform.

Further, the apparatus of this embodiment has a table 73.
It can be detached from the slot 75 and stored in the storage chamber 77 below the table 73 as shown in FIG. Therefore, when the cloth cutting operation is not performed, there is an advantage that the device can be stored in the storage chamber 77 and the table 73 can be used for other work.

In each of the above embodiments, the ring-shaped blade is bridged between the two pulleys and the ring-shaped blade is rotated in one direction. However, the present invention is not limited to this, and FIG.
By periodically reversing the large pulley 81 as shown in FIG. 2, the facing portions of the belt-shaped blade 82 may be moved up and down in opposite directions.

Further, as shown in FIG. 13, by simply pushing and pulling both ends 83a, 83b of the non-annular strip-shaped blade 83, the pair of opposing strip-shaped blades move up and down in opposite directions.

Furthermore, as shown in FIG. 14, it is also possible to utilize two annular band-shaped blades 84 and 85. Here, one belt-shaped blade 84 is connected to four pulleys 86, 87, 8
The belt-shaped blade 85 on the other side is bridged over the four pulleys 91, 92, 93, 94. Further, each of the band-shaped blades 84 and 85 has a crescent-shaped cross section, and has a convex surface on the inner side of the ring and a concave surface on the outer side.
Curvature outward between each pulley. Therefore, each strip-shaped blade 8
4, 85 are close to each other and contact at substantially the center between the upper pulleys 86, 91 and the lower pulleys 87, 92. By rotating these strip-shaped blades 84 and 85 in mutually different directions, the cloth can be cut at the portions where the strip-shaped blades 84 and 85 are in contact with each other.

Further, as shown in FIG. 15, the blade tips of the pair of belt-shaped blades 95, 96 may be saw blades. In this case, the cloth 97 is scissors-cut by the saw blades of the pair of strip-shaped blades 95 and 96. That is, the fibers of the cloth 97 are formed by the pair of band-shaped blades 9
It is caught by the 5,96 saw blades, caught, and cut without escape. Therefore, the cloth can be cut efficiently.

In short, it suffices to stack two strip-shaped blades and move these strip-shaped blades in mutually opposite directions. Even if the strip-shaped blades have a crescent-shaped cross section, the cross section is flat. Alternatively, the edge of the band-shaped blade may be a saw blade. Furthermore, the pair of strip-shaped blades may be independent of each other, and need not be annular.

[0037]

As described above, according to the apparatus of the present invention, the pair of strip-shaped blades are moved in opposite directions while being in contact with each other. When pressed, the fabric is easily cut. That is, the cloth can be easily cut without increasing the moving speed of the band-shaped blade.

[Brief description of drawings]

FIG. 1 is a diagram used to explain the basic principle of the present invention.

FIG. 2 is a sectional view of an embodiment of the cutting device according to the present invention when viewed from the front.

FIG. 3 is a sectional view of the apparatus of the embodiment shown in FIG. 2 when viewed from the side.

4 is a perspective view showing an annular band-shaped blade in the apparatus of the embodiment shown in FIGS. 2 and 3. FIG.

FIG. 5 is a view showing the band-shaped blade shown in FIG. 4 by cutting and enlarging it.

FIG. 6 is a diagram used for explaining the operation of the annular band-shaped blade in the apparatus of the embodiment shown in FIGS. 2 and 3;

FIG. 7 is a diagram showing the manner in which the cloth is cut by the annular band-shaped blade in the apparatus of the embodiment shown in FIGS. 2 and 3;

FIG. 8 is a diagram showing a mode in which the apparatus of the embodiment shown in FIGS. 2 and 3 is used.

FIG. 9 is a cross-sectional view of another embodiment of the cutting device according to the present invention when viewed from the front.

FIG. 10 is a sectional view of the apparatus of the embodiment shown in FIG. 10 when viewed from the side.

FIG. 11 is a view showing a mode in which the apparatus of the embodiment shown in FIGS. 9 and 10 is stored.

FIG. 12 is a view showing a modified example of the device according to the present invention.

FIG. 13 is a view showing another modification of the device according to the present invention.

FIG. 14 is a diagram showing another modification of the device according to the present invention.

FIG. 15 is a view showing still another modified example of the device according to the present invention.

FIG. 16 is a diagram showing an example of a conventional cutting device.

FIG. 17 is a view showing another example of a conventional cutting device.

[Explanation of symbols]

1,2,41,76 Band-shaped blade 3,32,33 Cloth 11,51 Upper case 12 Handle 13 Handle 14,62 Motor 15,25,52,63 Large pulley 16,23,52,64 Support 17,18 , 26, 27, 54, 55, 65, 66 Small pulley 21, 61 Lower casing 22 Roller 31, 71 Guide member 72 Clamping plate 73 Table 75 Slot

Claims (1)

[Claims] 1. A cloth cutting device, wherein a pair of strip-shaped blades are moved in opposite directions while maintaining a state in which the pair of strip-shaped blades are stacked in the longitudinal direction.