JPH056048Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cutting device equipped with an endless rotating band knife, and a polishing device for polishing the band knife.

2. Description of the Related Art As a conventional band knife polishing device of this type of cutting device, one constructed as shown in FIGS. 8 to 10, for example, is known.

To explain based on the drawings, 1 is the main body of the cutting device, and 2 is a table horizontally mounted on the main body 1. 3 are three pulleys 4 to 6 provided on the main body 1 below the table 2, above the table 2, and behind the table 2, respectively.
The band knife 3 is hung endlessly on the table and can be rotated in a vertical plane. It is provided. A pulley 4 provided below the table 2 is rotated by a belt 9 hooked between it and a motor 8, giving rotational force to the band knife 3. 10 is a main body 1 below the table 2;
The tip of the pipe 11 connected to the blower fan 10 is connected to a hollow part (not shown) formed over the entire table 2, and the end of the pipe 11 connected to the blower fan 10 is connected to a hollow part (not shown) formed over the entire table 2. Air is sent out from an air hole (not shown) so that many overlapping pieces of fabric placed on the table 2 and cut can slide smoothly on the table 2. With the above configuration, a large number of pieces of fabric can be placed on the table 2 in an overlapping state, and the fabric can be cut into a required shape by rotating the band knife 3 while sliding the fabric.

By the way, the blade portion of the band knife 3 wears out as the fabric is cut. Therefore, in order to polish the band knife 3, a polishing device 12 is provided on the main body 1 below the table 2, as shown in FIG. 8 and the like. This polishing device 12 holds disc-shaped grindstones 15 and 16 that are rotatable around rotating shafts 13 and 14 that are inclined at a slight angle with respect to the running direction of the band knife 3 from above and below the band knife 3. By operating the operating handle 17, the two grindstones 15, 16 are integrally moved in the width direction of the band knife 3, and the screws 18, 1
9, the peripheral surfaces of the grindstones 15 and 16 are brought into contact with both sides of the band knife 3. That is, each time the band knife 3 is polished, the widthwise dimension becomes smaller, and the two whetstones 1 are reduced accordingly.
5 and 16 in the width direction of the band knife 3 and the need to bring the peripheral surfaces of the grindstones 15 and 16 into contact with the surface to be polished of the band knife 3, the operation handle 17 and the screw 18 are ，
Nineteen operations were required. Note that the whetstone 1
By rotating the band knife 3 with the whetstones 15 and 16 in contact with the band knife 3,
16 is rotated by frictional force with the band knife 3, and the band knife 3 is polished.

Problems to be solved by the invention In the above conventional polishing device, the band knife 3
In order to bring the grindstones 15, 16 into contact (including when they are removed), it is necessary to operate the operation handle 17 and the screws 18, 19, which is a problem in that it is time-consuming. In particular, as the band knife 3 is frequently polished and its width becomes smaller, the grindstone 1
5 and 16 must be brought close to the surface to be polished of the band knife 3, and the width of the abutting surface of the grinding wheels 15 and 16 must be set so that the outer periphery of the grinding wheels 15 and 16 abut against the surface to be polished of the band knife 3. There was a problem in that the operation of bringing the grindstones 15, 16 into accurate contact with the surface to be polished of the band knife 3 was time-consuming.

This invention solves these problems,
The object of this invention is to facilitate the operation of bringing the grindstone into contact with and separating from the band knife.

Means for Solving the Problem In order to solve this problem, the present invention provides a polishing device attached to the main body of the cutting device in a cutting device that cuts fabric placed on a table using an endless rotating band knife. The main body includes a pair of movable bodies that can move toward and away from each other, a spring that biases the movable bodies toward each other, and a cam that is located between the movable bodies and adjusts the distance between the movable bodies. A handle coupled to the cam is provided on the outside of the device main body, and a disc-shaped grindstone is provided that is coupled to the pair of movable bodies and whose flat surface can come into contact with both sides of the blade of the band knife. The grindstones connected to the body are pivotally supported by shafts inclined in opposite directions, and are arranged at positions shifted in the length direction of the band knife.

Function With this configuration, the operation of bringing the whetstone into contact with and separating from the band knife in order to polish the band knife can be easily performed by moving the whetstone up and down with the handle, improving work efficiency compared to the conventional example. can be achieved.

Embodiment Hereinafter, the drawings (first
This will be explained based on FIGS. Note that the drawing only shows the polishing device, and other parts (cutting device) are the same as those of the conventional example, so detailed illustrations are omitted.

In the figure, reference numeral 21 denotes a polishing device attached to the cutting device main body 23 for polishing the hand knife 22. This polishing device 21 is movable up and down inside the device main body 24 along a guide rod 25 facing vertically. A pair of upper and lower movable bodies 26, 27 provided in
and a cam 30 which is rotated by the operation of a handle 29 connected to a shaft 28 located between the upper and lower movable bodies 26 and 27 and protruding from one side of the device main body 24.
a spring 31 that urges the upper movable body 26 downward; a spring 32 that biases the lower movable body 27 upward; a grindstone mounting body 33 protruding toward the cutting device main body 23 side; and a grindstone mounting body 34 connected to the lower movable body 27 and projecting toward the cutting device main body 23 side on the other side of the device main body 24;
Disc-shaped grindstones 35 and 36 are rotatably attached to the tips of these grindstone mounts 33 and 34.
It consists of. For more details, please refer to the above-mentioned whetstone 3.
5 and 36 are pivotally supported by shafts 37 and 38 that are inclined in opposite directions to each other at a slight angle of inclination (equal to the angle of inclination of the blade portion of the band knife 22) with respect to the vertical line. The two grindstones 35 and 36 are configured to sandwich the blade of the band knife 22 in a plane from above and below at a position slightly shifted in the length direction of the band knife 22. Further, on one side of the device main body 24, there is a
The movable body 2 is pushed by the springs 31 and 32 so as not to apply excessive force from the two grindstones 35 and 36.
A stopper 39 is provided to stop the cams 6 and 27 from moving toward each other via the cam 30. Specifically, this stopper 39 is screwed into a female screw body 40 attached to one side of the device main body 24 and is provided so as to be movable up and down by rotation, and the tip of this stopper 39 is connected to the handle 2
By contacting the rod 29a of 9, the cam 30
The rotation of the movable bodies 26 and 27 can be stopped from moving toward each other.

Note that the device main body 24 is equipped with the grindstones 35 and 36.
are attached to the cutting device main body 23 so that they are located at symmetrical positions with the band knife 22 at the center.

Further, guide members 42 each having a groove 41 into which the band knife 22 is inserted are provided in the cutting device main body 23 at positions on both sides of the polishing device 21, so that when the band knife 22 rotates during polishing, which will be described later. , rotating whetstone 3
The structure is such that the band knife 22 does not vibrate or jump due to contact with the grinding wheels 5 and 36, and thereby the band knife 22 can be ground with high accuracy by the grindstones 35 and 36.

In the above configuration, when the band knife 22 is cutting the fabric on the table 43, the grindstones 35, 36 are movable by the cam 30 by lifting the handle 29 as shown by the two-dot chain line in FIG. 26 and 27 are separated from each other, so that they are separated from the band knife 22. At this time, the cam 30 is displaced from the oblique state shown by the solid line in FIG. 5 to the upright state, and the spring 31,
Since the cam 30 receives force from the movable bodies 26 and 27 on which the biasing force of the cam 32 is applied in the direction of pushing on the same line at right angles, the cam 30 does not fall down and pushes the movable bodies 26 and 2
7. As a result, the grindstones 35 and 36 can be kept open.

As the band knife 22 becomes worn as it is used, it becomes necessary to polish the band knife 22. At that time, the angle of the handle 29 and the cam 30 is adjusted by the stopper 39 so that the grindstones 35 and 36 come into contact with the band knife 22 with an appropriate force, and thereby the movable bodies 26 and 27
The whetstones 35 and 36 abut against the cam 30 and are prevented from coming any further, and the whetstones 35 and 36 abut against the band knife 22 with an appropriate force. By rotating the band knife 22 in this state, the whetstones 35 and 36 are rotated by the abrasion force with the band knife 22 with their flat surfaces in contact with both sides of the blade of the band knife 22, whereby the band knife 22 is polished. be done. When the polishing is completed, the rotation of the band knife 22 is stopped, the cam 30 is rotated to its original state by the handle 29, the grindstones 35 and 36 are separated from the band knife 22, and the cutting operation is then restarted. .

The width of the band knife 22 becomes smaller each time the band knife 22 is polished, but the grindstones 35 and 36 have shafts 37 that are inclined in opposite directions.
By being pivotally supported at 38 and in contact with the band knife 22 in a plane, even when the width of the band knife 22 becomes small, the grindstones 35 and 36 can be raised and lowered by operating the handle 29, and the band knife 2
All you have to do is move it closer to 2, making it very easy to operate.

Effects of the Invention As described above, according to the present invention, the operation of bringing the whetstone into contact with and separating from the band knife in order to polish the band knife can be easily performed by moving the whetstone up and down with the handle, which is different from the conventional method. It is possible to improve work efficiency compared to the conventional method. In particular, even if the width of the band knife becomes smaller as it is polished, it is only necessary to move the whetstone closer to the band knife by operating the handle, making the operation very simple.

[Brief explanation of the drawing]

Fig. 1 to Fig. 7 show one embodiment of the present invention, Fig. 1 is a front view of the grinding device mounting portion, Fig. 2 is a side view of the same, Fig. 3 is a perspective view of the grinding device, Fig. 4 is a side view of the grinding wheel mounting portion of the grinding device cut away, Fig. 5 is a side sectional view showing the internal structure of the grinding device, Fig. 6 is a cross-sectional view of Fig. 5 taken along line X-X, Fig. 7 is a side sectional view of the guide member mounting portion, Figs. 8 to 10 show a conventional example, Fig. 8 is a whole front view of a cutting device equipped with a grinding device, Fig. 9 is a side view of the same, and Fig. 10 is a perspective view of the grinding device. 21 ... grinding device, 22 ... band knife, 2
3: Cutting device main body, 24: Device main body, 25:
...guide rod, 26, 27...movable body, 29...handle, 30...cam, 31, 32...spring, 3
5, 36...grindstone, 37, 38...shaft.

Claims (1)

[Scope of utility model registration request] In a cutting device that cuts fabric placed on a table using an endless rotating band knife, a pair of movable bodies that can be moved near and far from each other are included in a polishing device body that is attached to the cutting device body, and the movable bodies are moved close to each other. a spring biasing the direction;
and a cam located between the movable bodies to adjust the distance between the movable bodies, and a handle coupled to the cam is provided on the outside of the polishing device main body, and the blade of the band knife is coupled to the pair of movable bodies. A disc-shaped grindstone is provided whose flat surface can come into contact with both sides of the band knife, and the grindstone connected to the pair of movable bodies is pivotally supported by axes inclined in opposite directions to each other. A band knife polishing device in a cutting device arranged at a shifted position.