JPS6245037Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a table for a band knife cutting machine used when cutting fabrics stacked to a predetermined thickness. The purpose is to eliminate waste of pressurized air.

In a band knife cutting machine, as shown in Fig. 1, an endless band knife 2 is placed vertically against a horizontal table 1, and is circulated at high speed in the direction of the arrow. While moving the laminated fabric 3 placed on the surface by hand, the fabric 3 is cut along a pattern (not shown) on the fabric 3. However, when the thickness d of the fabric 3 increases and the fabric 3 becomes heavier, it becomes difficult to move the fabric 3 lightly on the table 1, and cutting accuracy tends to decrease. Therefore, since the thickness d cannot be made sufficiently large, the work efficiency decreases. As a countermeasure for this, a large number of air blow holes 4 are made in the part of the table 1 on which the fabric 3 is placed.
A main pipe 7 connected to the discharge port 6 of the blower 5 is arranged below the table 1, and a large number of mouthpieces 8 provided on the main pipe 7 are respectively connected to the air outlet 4 via vinyl hoses 9. Fabric 3 at the upper end of outlet 4
It is conceivable to install an air valve 10 that opens when pushed. However, in that case, the structure and installation of the main pipe 7 and the piping of the vinyl pipe 9 will not only become complicated, but also significantly increase manufacturing costs.
Appearance also deteriorates.

In order to solve the above problems, the present invention makes the table a hollow structure and has many air blowing holes in the upper plate.
An air valve was attached to each hole to open when pushed by the object to be cut on the table, and the air chamber inside the table was connected to the blower outlet, and the distribution density of the air injection holes was increased in the area near the descending band knife. Examples are shown in FIG. 2 and below.

FIG. 2 is a plan view of the table 20 according to the present invention;
FIG. 3 is a cross-sectional view of the table 20 in FIG.
As shown in Fig. 3, the top plate 21 and bottom plate 22 are parallel to each other.
and a frame material 24 surrounding the internal air chamber 23 and spacers 25 appropriately distributed within the air chamber 23, and a base 27 fixed to the underside of the bottom plate 22 in alignment with the air introduction hole 26 of the bottom plate 22, The upper end of a hose 28 is fitted and fixed to the cap 27, and the lower end of the hose 28 is connected to a discharge port of a blower (not shown). A band knife 2 is placed in the center of the table 20.
A hole 29 through which the band knife 2 passes, and a groove 30 in which the band knife 2 is placed are provided in the hole 29.

Air discharge holes 31 are arranged densely in the area A of the table top plate 21 near the band knife 2, and similar air discharge holes 31 are arranged sparsely in the other areas.

In FIG. 4, which is an enlarged cross-sectional view of FIG.
An air valve 32 consisting of a valve case 33 containing a ball 32' is attached, and the valve case 33 has inward flanges 3 at the upper and lower ends of a central hole 34 to prevent the ball 32' from escaping.
5 and 36, and the upper end surface 37 coincides with the upper end surface of the upper plate 21. 38 is a serration for preventing slippage. This air valve 32 can be entirely molded from resin such as nylon, and the ball 3
2' is a light hollow body. In addition, in Figure 1, 1
1 is frame, 12, 13, 14 are frame 11
15 is a motor, 1 is a band pulley supported by
6 and 17 are speed change pulleys, and 18 is a V-belt.

When the motor is started, the band knife 2 is circulated at high speed, and the air chamber 23 in the table 20 is filled with pressurized air by the blower. At that time, the ball 32' of the air valve 32 is connected to the air chamber 2.
The air pressure in the valve 3 presses against the upper flange 35 from below to keep the air valve 32 closed. When the fabric 3 to be cut is placed on the table top plate 21, the ball 32' of the air valve 32
The ball 32' and the case 33 descend due to the weight of the ball 32' and the case 33.
The pressurized air in the air chamber 23 blows upward through the annular gap between the two, applying an upward force to the fabric 3.
This allows the cloth 3 to be lightly slid on the table top plate 21. Air valve 3 no longer receives the load of fabric 3 due to movement of fabric 3
2 is automatically closed by the air pressure in the air chamber 23, and wasteful outflow of pressurized air is prevented.

As explained above, the present invention has a flat air chamber 23.
A large number of air blowing holes 31 are formed in the upper plate 21 of the table 20, which has a hollow structure, and at the upper end of each hole 31, when pressed by the object to be cut (laminated fabric 3) on the table 20, a light ball 32' is released by air pressure. Attach an air valve 32 that opens by descending against the table 20.
The air chamber 23 in the table 20 is connected to the discharge port 6 of the blower 5, and the distribution density of the air jet holes 32 in the area A near the descending band knife is increased. Since it has a hollow structure, for example, one base 27 and the discharge port of the blower can be connected with one hose 28, and the piping structure is extremely simple.
The appearance will also be greatly improved. An air valve 32 is attached to the upper end of each air outlet hole 31 to open when pushed by the object to be cut (fabric 3) on the cheeseble 20, so that only the part of the air outlet 31 that is pushed by the fabric 3 is exposed to the fabric 3. The openings are opened facing each other, and the pressurized air flows upward from that part, so that upward force can be reliably applied to the fabric 3 without wasting air, and the movement of the fabric 3 becomes light. The air valve 32 of the present invention is of a type in which a light ball 32' moves downward against air pressure and opens when pressed by an object to be cut, so for example, the load when the air valve 32 opens can be freely changed by changing the air pressure. Therefore, when the laminated fabric 3 is light, the air pressure inside the air discharge hole 31 is lowered and the table 1
The fabric on the top can be moved smoothly so that it is in an optimal state for cutting work. Conversely, if the fabric 3 is heavy, increasing the discharge air pressure can similarly move the fabric 3.
The movement of people can be facilitated. That is, regardless of the weight of the fabric 3 to be handled, the smoothness of movement of the fabric 3 on the table 1 can be made uniform, and it is possible to improve the efficiency of cutting work without requiring any skill.

Furthermore, according to the present invention, the air discharge holes 31 are arranged densely in the area A near the band knife 2, and the air discharge holes 31 are arranged sparsely in the other area B.
The fabric near the band knife 2 can be pushed up more strongly than the surrounding area, and the fabric 3 can move easily despite the downward force exerted by the band knife 2.
It is also possible to reliably prevent the problem of wrinkles occurring in the cloth 3 due to friction between the cloth 3 and the table top plate 21 in the vicinity of the table top plate 21 .

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of the band knife cutting machine in the improvement process, Fig. 2 is a plan view of the table of the present invention corresponding to the cross-section shown in Fig. 1, Fig. 3 is a cross-sectional view shown in Fig. 2, and Fig. 4 The figure is an enlarged cross-sectional view of FIG. 3... Laminated fabric (material to be cut), 5... Blower, 6... Discharge port, 20... Table, 21...
Upper plate, 23 air chamber, 31... air discharge hole, 32...
...Air valve.

Claims (1)

[Scope of utility model registration request] A large number of air blowing holes are made in the top plate of a hollow table with a flat air chamber, and at the top of each hole, when pressed by an object to be cut on the table, a light ball resists air pressure and opens as it descends. A table for a band knife cutting machine, characterized in that an air chamber in the table is connected to a discharge port of a blower, and the distribution density of air jet holes is increased in an area near a descending band knife.