JPS6348342Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a band saw guide device used for guiding the band saw of a band saw machine, and in particular, it twists and raises the band saw so that the band saw touches the cutting material at a predetermined angle, and when the band saw is cutting. This invention relates to a guide device with improved guide rollers to prevent noise and vibration.

Generally, a bandsaw machine has three bases, as shown in Figure 1.
and a housing 5 that moves up and down about a hinge 7 in a plane perpendicular to the base 3. This vertical movement of the housing 5 is controlled by the cylinder 9.
It is done by. A flexible bandsaw 11 is a driving wheel 1
3 and the driven wheel 15. 1
7 and 19 are axes of the driving wheel 13 and the driven wheel 15, respectively. This band saw 11 has a guide device 2 in the cutting area.
1 and 23 guide the blade so that it stands vertically downward. The guide devices 21, 23 are attached to the lower ends of arms 25, 27 supported by a support beam 29 of the housing 5, respectively. A workbench 31 is provided in the cutting area of the base 3, and the cutting material W is placed on it. This cutting material W is held by a holding device 33 and supported in a predetermined cutting area. 33f is a stationary clamping tool, 33m is a movable clamping tool, and the cutting material W is clamped between them.

Then, the housing 5 is raised to the state shown by the imaginary line in FIG.
3f and 33m, and then drive the drive wheel 13 to run the band saw 11 and gradually lower the housing 5 to cut the cutting material W.

Conventionally, the band saw guide device of such a band saw machine has guide rollers of the same diameter that face each other in front and back across the band saw in order to twist the band saw that comes in an inclined state to a vertical position. is provided. FIG. 2 shows such a conventional example.

The part indicated by the broken line in the figure is the guide device 21,
23, 39 and 41 are guide members that hold the band saw 11 so as to apply it to the cutting material W at a predetermined angle, and 66 and 68 are guide rollers. Conventionally, the guide rollers 66 and 68 were made of the same material and had the same dimensions, and were selected to have the minimum diameter necessary to smoothly guide and twist the band saw.

However, if the guide rollers are used to suppress the noisy noise that occurs when cutting difficult-to-cut materials such as stainless steel, the rollers must have a certain weight; The diameter of the blade must be considerably larger than that in the conventional case where the purpose is simply to guide a smooth bandsaw.

On the other hand, with a band saw machine, the material clamping tool and the band saw are moved as close as possible in order to minimize the cutting length of the cut material and use the material without wasting it, and to increase the rigidity of the clamped part of the band saw. ing. For this reason, there is only a small gap between the material clamping tools 33f, 33m and the band saw guide members 39, 41 shown in FIG. There is a problem.

This idea was made in view of these conventional problems, and it eliminates the need for the two guide rollers facing each other across the band saw to have the same specifications for vibration and sound insulation. Focusing on the fact that it only needs to be heavy, a roller of the minimum required size or a simple sliding guide member is installed as a support on the input side of the cutting material where the distance between the clamping tool and the band saw cannot be increased, and the band saw is held between the clamping tool and the band saw. By installing a large-diameter guide roller with the necessary weight for vibration and soundproofing on the opposite side, vibration and soundproofing can be achieved without reducing the minimum cutting length of the cutting material or the clamping rigidity. It is an object of the present invention to provide a band saw guide device that also enables the following.

This invention will be explained in detail below along with examples shown in the drawings. 3 to 8 show a guide device according to an embodiment of this invention, which is used as the guide device indicated by reference numerals 21 and 23 in FIG. Guide the cutting material W perpendicularly so as to hit it at right angles, and at the same time cut the band saw 1.
This prevents the shaking and vibration of 1.

In the figure, reference numeral 35 denotes a main body, and a fixed guide member 39 and a movable guide member 41 are attached to a recess 37 at the lower corner inside thereof. 43 is band saw 11
This is a wear-resistant chip provided to prevent wear due to contact with

As shown in detail in FIG. 4, the fixed guide member 39 is attached by a fixture 45 to the back side of the main body 35, that is, to the input side where the cutting material W is fed into the band saw 11. The movable guide member 41 is attached to the discharge side (front side) from which the cut material W is sent out using a presser pin 47, and is movable back and forth with respect to the band saw 11.

This presser pin 47 is horizontally slidable in the recess 37 of the main body 35, and is pressed inward by a presser plate 51 that abuts the pin head 49 exposed to the outside. The presser plate 50 serves as a presser member that presses the movable guide member 41 against the band saw 11, is made of an elastic material, is disposed between lever bearings 53a and 53b fixed to the main body 35, and has an upper end. is engaged with the engagement head 57 of the first roller link 55, and its lower end is brought into contact with the pin head 49 of the presser pin 47.

Reference numeral 59 denotes a clamp lever, which serves as a type of pressing device for pressing the presser plate 51, and is connected to the pin 6.
1 is supported by lever bearings 53a and 53b. A cam portion 63 is formed at the lower end of the clamp lever 59, and this cam portion 63 presses the center portion of the holding plate 51.

The cam portion 63 is connected to the pin 61 as shown in detail in FIG.
It has a surface 63a that is far away from the axis and a surface 63b that is close to it, and in the state shown by the solid line in the figure, the far side surface 63a presses the presser plate 51, and the clamp lever 59 is moved as shown by the imaginary line. When it is pulled down to the position shown in FIG.

These presser plates 51, lever bearings 53a, 53
b, and the clamp lever 59 are the traveling band saw 11.
It is tilted slightly outward from the perpendicular direction. In other words, assuming that the cutting material W is conveyed perpendicularly from the back side to the front side of the paper in FIG.
It is tilted approximately 30 degrees to the right with point P at the bottom of 1 as the center of rotation. On the contrary, the clamp lever 59 is attached to the left guide device 23 so as to be inclined to the left by about 30 degrees.

The reason why the clamp lever 59 is tilted in this manner is as follows. In other words, in order to support the clamp lever 59, lever bearings 53a and 53b must be installed on both sides, but if the clamp lever 59 is installed vertically, it must be placed inward from point P, that is, on the cutting material W side. The inner bearing 53a comes to the end. In order to prevent the portion of the bearing 53a protruding inward from coming into contact with the material clamping tools 33f, 33m, point P must be set on the outside, that is, at a position away from the cutting material W. However, doing so means that the band saw 11 is guided at a position away from the cutting material W, which deteriorates the cutting performance for the cutting material W. Therefore, in order to eliminate this problem, it is preferable to bring each point P of the guide devices 21 and 23 as close to the cutting material W as possible. for that,
By attaching the clamp lever 59 at an angle, the inner lever bearing 53a is prevented from protruding inward from the main body 35.

3, 5, 7, and 8 are rollers 65 and 67 having different diameters, which are attached to the lower surface of the main body 35 outside the guide members 39 and 41. 11 is attached to sandwich it.

A small-diameter roller 65 serving as a support is supported by a fixed shaft 69 screwed into the main body 35. The movable guide roller 67 has a pin 71 attached to the main body 35.
The roller support arm 73 is attached to the lower end of a roller support arm 73 that is supported so as to be rotatable in a vertical plane. 7
5 and 77 are ball bearings that allow the rollers 65 and 67 to rotate freely, respectively.

The upper end of the roller support arm 73 is connected to a horizontal second link 81 via a coil spring 79, which is an elastic member. Reference numeral 83 is a spring retaining screw that can freely adjust the stored force of the coil spring 79. The second link 81 is connected to one end of a rotating link 85, and the other end of this rotating link 85 is connected to the first link 55.

The rollers 65 and 67 twist the band saw 11, which is drawn between them in an inclined state, into a vertical state and guide it between the guide members 39 and 41;
Furthermore, the particularly large-diameter guide roller 67 serves to suppress vibrations and cutting noise while the band saw 11 is running.

The reason why these guide rollers 65 and 67 are made small in diameter on the inlet side of the cut material W and have a large diameter in the outlet side is as follows. In other words, from the viewpoint of soundproofing and vibrationproofing, it is preferable to use a large-diameter one with a large weight. However, in order to use the cutting material W without waste until its length is shortened, it is necessary to use the clamping tools 33f and 44m and the band saw 1.
1 must be sufficiently close to each other. For this purpose, as shown in FIG. 7, the clamping tools 33f, 33m and the guide members 39, 41 are placed as close as possible to each other, so that there is a space on the loading side of the cut material 11 to install a roller with a sufficient diameter and weight. I can't find it. On the other hand, there are relatively few such restrictions on the conveyance side of the cut material W, and it is possible to use rollers with a sufficiently large diameter.

The operation of the guide device having the above configuration will be explained next. What is shown in Figs. 3 to 8 is a band saw 1.
1 completely between the guide members 39 and 41 and the roller 6
5 and 67, and in this state, the band saw 11 travels and cuts the cutting material W.

In this case, the surface 63a of the cam portion 63 of the clamp lever 59 presses the center portion of the presser plate 51,
This pressing force acts to forcefully press the presser pin 47 and the first link 55 at both upper and lower ends of the presser plate 51, respectively. The presser pin 47 pressed by the presser plate 51 moves to press the movable guide member 41 against the fixed guide member 39, as shown in detail in FIG. Moreover, it is sandwiched so that it can slide.

Further, the first link 55 pressed by the presser plate 51 slightly rotates the rotary link 85 horizontally and clockwise as shown in detail in FIG. ) and rotate the upper part of the roller support arm 73 toward you (to the left in FIG. 8). As the roller support arm 73 rotates about the pin 71, the guide roller 67 attached to its lower end is pressed against the roller 65, which serves as a small-diameter support, and the band saw 11 is thereby elastically sandwiched.

The guide members 39, 41 and rollers 65, 6
The elastic force when the band saw 11 is held between the band saws 7 and 7 is due to the bending elastic force of the presser plate 51 itself and the elastic force of the coil spring 79.

If it becomes necessary to replace the band saw 11 due to breakage or the like, pull the clamp lever 59 toward you as shown by the chain line in FIG. This rotation of the lever 59 brings the surface 63b of the cam portion 63 into contact with the presser plate 51. At this time, since the surface 63b is closer to the center of rotation of the lever 59 than the surface 63a, the pressing force against the presser plate 51, which had been strongly pressed until now, is loosened.
Therefore, the pressing force on the presser pin 47 is also relaxed, and the pressing force of the movable guide member 41 on the band saw 11 is also relaxed. At the same time, the compression of the coil spring 79 acting via the links 55 and 85 is also loosened, so that the pressing force of the roller 67 against the band saw 11 is also loosened.

In this way, the guide member 39 for the band saw 11,
41 and between the rollers 65 and 67 are loosened by pulling down the clamp lever 59, and the band saw 11 is removed from the guide devices 21 and 23.
You can now set up another bandsaw.

Roller 6 as support in this example
5. The combination of guide rollers 67 is not limited to the above embodiment, and the following changes are also possible.

(A) As in the embodiment shown in FIG. 9, a block-shaped sliding guide 87 on which the band saw 11 simply slides is used as a support, and vibration isolation of the band saw 11 is achieved.
The role of soundproofing can be made to be performed by the guide roller 89 having a large diameter.

(B) As in the embodiment shown in FIG. 10, it is possible to use rollers 91, 93 as supports and large diameter guide rollers 95, 97 in combination with different diameters for the left and right guide devices 21, 23, respectively.

(C) As in the embodiment shown in FIG. 11, only one of the left and right guide devices has a roller 99 as a support.
It is also possible to use a guide roller 101.

As can be understood from the above description of the embodiments, the gist of the present invention is as stated in the claims for utility model registration. 35 is provided with a fixed guide member 39 for guiding one side of the band saw 11 and a small diameter roller 65 or a block-shaped guide 87.
A movable guide member 41 and a large diameter movable guide roller that face the fixed guide member 39 and the roller 65 or guide 87 and guide the other side of the band saw 11 are movably mounted. An elastic member 79 is interposed between the movable guide roller and the other end of the presser member 51 that holds and presses the movable guide member 41 at one end. A pressing device for pressing the band saw 51 toward the band saw 11 is attached to the main body 35.

Therefore, according to the present invention, by pressing the holding member 51 in the direction of the band saw 11 with the pressing device, the movable guide member 41 and the movable guide roller are simultaneously pressed against the other side of the band saw 11. . Furthermore, by releasing the pressure on the pressing member 51 by the pressing device, the pressure on the band saw 11 by the movable guide member 41 and the movable guide roller is simultaneously released, and the band saw 11 can be easily attached and detached. It is possible.

In particular, according to the present invention, since the elastic member 79 is interposed between the presser member 51 and the movable guide roller so that the accumulated force can be adjusted, the pressing force of the movable guide roller and the movable guide member 41 against the band saw 11 can be adjusted. This is possible due to differences in cutting materials and band saws 11
Even if the vibration of the band saw 11 differs due to differences in the pitch of the blade, the width, thickness, etc. of the body,
This allows the vibration of the band saw 11 to be effectively suppressed. Furthermore, since one side of the band saw 11 is guided by a small-diameter roller or block-shaped guide 87, the width of the main body 35 can be reduced accordingly. In other words, the space in which the clamping tool that clamps and fixes the cutting material receives the main body can be reduced, and the strength of the clamping tool can be improved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the entire band saw machine, Fig. 2 is a schematic plan view of a conventional example, Fig. 3 is a front view of an embodiment of this invention, and Fig. 4 is a line A-A in Fig. 3. 5 is a bottom view of the embodiment same as above, FIG. 6 is a sectional view taken along the line B-B in FIG. 3, FIG. 7 is a partially cutaway plan view of the embodiment same as above, and FIG. 9 is a schematic plan view of another embodiment of the invention, FIG. 10 is a schematic plan view of still another embodiment, and FIG. 11 is a schematic plan view of still another embodiment. It is a diagram. 11... Band saw, 21, 23... Guide device, 65
...Roller as support, 67...Guide roller, 87...Sliding guide as support, 89
...Guide roller, 91, 93...Roller as a support body, 95, 97...Guide roller, 99...Roller as a support body, 101...Guide roller.

Claims (1)

[Scope of utility model registration request] A guide device that pinches and guides the band saw at least on the sides of the cutting material in the cutting area, and the main body 35 of the guide device includes a fixed guide member 39 that guides one side of the band saw 11, and the fixed guide member 3.
A small-diameter roller 65 or a block-shaped guide 8 that guides one side of the band saw 11 on the outside of the band saw 9
7, a movable guide member 41 that faces the fixed guide member 39 and guides the other side of the band saw 11, and a large diameter movable guide roller that faces the roller 65 or guide 87 and guides the other side of the band saw 11. is attached to the main body 35 so as to be movable toward and away from the band saw 11, and the other end of the holding member 51 for pressing the movable guide member 41 toward the band saw 11 and the movable An elastic member 79 is interposed between the guide roller and the accumulating force can be adjusted freely, and a pressing device for pressing the pressing member 51 in the direction of the band saw 11 is attached to the main body 35. A guide device for band saws.