JPS6335386B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a wide belt sander applied to grinding and polishing wood, etc. Specifically, the present invention relates to a wide belt sander machine applied to grinding and polishing wood, etc. Regarding a wide belt sander machine that can be applied.

<Prior art> A sanding belt is wrapped around a belt drive mechanism provided on a sanding frame, and a tread pad device is arranged between a front roll and a rear roll of the belt drive mechanism arranged on the traveling path side. There are various types of wide belt sanders in which the pressure pad of the pressure pad device is brought into contact with the inner surface of the belt.

By the way, the sanding belt of such a wide belt sander is usually a thin belt x made of paper, cloth, or the like. However, in recent years, nonwoven fabric belts have come to be used to improve the gloss and finish of the surface to be ground, and to make the painted surface more beautiful. By the way, this non-woven belt
has a wall thickness of 5 to 10 mm.For example, as shown in Figure 10A, if the nonwoven fabric belt y is used as it is in a wide belt sander a whose position is adjusted for thin belts, the The ground end o of the nonwoven fabric belt y protrudes toward the running material path. In order to obtain the required cutting thickness corresponding to this, it is necessary to move the running material device d, which faces the tread pressure pad device c, in the direction of separation by the increased thickness.

However, due to the movement of the treading pad device c, the pad surface f is removed from between the front roll e and the rear roll g.
This causes the wood to protrude and the inclination of the sanding belt stretched between the front roll e and the tread pad f becomes large, which eats away at the edges of the wood and causes the edges to sag.

Further, pressure rolls h are provided before and after the tread pad device c, and as the running material device d moves in the separating direction, the distance between the pressure roll h and the running material surface of the running material device d increases. Become. For this reason, the treading force of the press roll h is weakened, and the workpiece cannot be pressed against the running material device d with the required force.

Further, at the entrance of the running material passage, there is provided a material feeding regulation piece i that regulates the vertical height of the entrance to prevent multiple workpieces from being fed. If the height is changed and left as is, the effect of the regulating piece i will be erased.

Incidentally, the amount of position adjustment of the pressure roll h and the position adjustment of the material feeding regulating piece i is small, so that it is practically impossible to adjust the position, and the above-mentioned disadvantages cannot often be solved.

These technical problems also apply to the bottom surface grinding type wide belt sander, as shown in FIG. 10B. In this case, in response to the movement of the pressure pad device c, the guide table j at the front of the pressure pad device c is moved.
However, the amount by which this guide table 1 can be raised and lowered is small, and as mentioned above, this is often not possible.

Similar problems occur with various other wide belt sanders, such as those of the top surface grinding type with a guide table j provided at the top, and those of the bottom surface grinding type with a pressure roll h provided at the bottom.

For this reason, conventional wide belt sanders
The reality is that special machines are set up for thin belts and nonwoven belts, and are not used for both purposes.

An object of the present invention is to provide a wide belt sander that can be used for both a thin belt x and a nonwoven belt y.

<Means for Solving the Problems> The present invention connects a mounting body for supporting a pressing pad to a cylinder rod of an automatic pad cylinder provided on a suspension body, and connects the mounting body to the suspension body. A lifting guide shaft is inserted between the lifting body and the sanding frame, and the pressing pad is controlled to rise and fall by driving the automatic pad cylinder. In addition, a vertical fine adjustment mechanism of the tread pressure pad device is installed, and the front roll is supported on the sanding frame so that the vertical position can be adjusted by the vertical fine adjustment mechanism, and the rear roll is mounted on the pad surface of the tread pressure pad device. It is characterized in that it is held at a position retreated from the running material path more than the maximum retreat position.

<Function> When the pad surface of the tread pad device protrudes from the reference position to the running material path side by changing from the thin belt x to the non-woven belt y, the tread pressure pad device is adjusted by the vertical fine adjustment mechanism. The belt is moved in the direction of separation by an amount corresponding to the increase in the thickness of the belt, and is placed in an appropriate position relative to the pressure roll or the like. Correspondingly, the front roll is also moved by the same distance in the separating direction by the vertical fine adjustment mechanism. As a result, the pad surface and the grinding side edge of the front roll return to their pre-change positions, thus eliminating the need to adjust the movement of the press roll, material feeding regulating piece, etc.

<Example> An example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a top surface grinding type wide belt sander machine, in which a running material device 5 is provided at the bottom of a main body frame 1, and a running material belt 4 is stretched between running rolls 2 and 3. Further, a sanding frame 7 is provided on the main body frame 1 at an upper position of the running material device 5. A steering roller 8 is provided at the upper end of the sanding frame 7, and a large-diameter front roll (drive roll) 9 and a rear roll (driven roll) 10 are provided at the lower end of the steering roller 8, and a drive mechanism is provided. It consists of Further, a treading pad device 12 is fitted into a mounting groove 11 formed in the sanding frame 7 between the rolls 9 and 10, and the sanding belts x, y are tensioned on the pad surfaces 13 of each roll and the treading pad device 12. The running material path 1 is stretched between the running material device 5 and the tread pressure pad device 12.
4 is formed.

Further, a pressure roll 16 is provided above the running material passage before and after the sanding frame 7, and is pressed toward the running material device 5 by a bullet 15. Furthermore, at the entrance of the running material passage 14, a material feeding regulating piece 17 is provided vertically to prevent the feeding of a plurality of workpieces.

Next, the tread pressure pad device 12 will be explained with reference to FIGS. 2 and 3.

Reference numeral 20 indicates a pressing pad fixed to the movable base 21, and an air bag (not shown) is provided within the frame 22.
It has a known structure in which an elastic plate 23 such as a sponge is fixed to the lower end and the elastic plate 23 is covered with a pad cloth 24, the lower surface of which is the pad surface 13. The movable pedestal 21 is removably attached to a mounting body 26 via adjustment bolts 25 for adjusting the amount of left and right inclination.

The mounting body 26 is suspended relative to the suspension body 27 by vertical guide shafts 28, 28 so as to be relatively movable up and down. Moreover, on the upper part of the suspension body 27,
An automatic pad cylinder 29 is mounted, and by the action of this cylinder, the workpiece is moved to the pad surface 13.
It operates when the pressure pad 2 is directly under the
0, its operation is canceled as the workpiece passes, and the pressing pad 20 moves back downward due to the restoring elasticity of the springs installed in the lifting guide shafts 28, 28.

Next, a first embodiment of the vertical fine adjustment mechanism of the tread pressure pad device 12 will be described with reference to the same figure.

The suspension body 27 has its front and rear ends raised upward;
An eccentric shaft 32 is rotatably supported by a bearing 31 at the rising ends 30, 30. The support shaft portions 33a and 33b connected to the front and rear ends of the eccentric shaft 32 are connected to the main shaft portion 3 of the eccentric shaft 32.
It is eccentric to 4. Further, the support shaft portion 33
a, 33b are pivotally supported by bearings 35a, 35b connected to the sanding frame 7, and a rotation operation part 36 is fixed to the front end of a front support shaft part 33a protruding from the front bearing 35a. .

When the rotation operation section 36 is manually rotated, due to the eccentricity of the support shaft sections 33a, 33b and the main shaft section 34,
The hanging body 27 moves, and the mounting body 26 moves accordingly.
This causes the pressing pad 20 to move up and down.

FIG. 4 shows a second embodiment of the vertical fine adjustment mechanism of the tread pressure pad device 12, in which worms 41, 41 are mounted on the upper wall 40 of the mounting groove 11 of the sanding frame 7 and are rotatably supported. Shafts 42, 42
The screw rods 43, 43 are formed by extending from the lower end of the holder 27, and the screw rods 43, 43 are screwed to the front and rear ends of the suspension body 27. The worms 41, 41
is engaged with an adjustment screw 44 which is rotatable on the front surface of the sanding frame 7, and is rotated by this rotation.

With this mechanism, when the adjustment screw 44 is rotated, the worms 41, 41 are rotated, and the suspension body 2 is rotated.
7 is raised and lowered by the feeding action of the screw rods 43, 43. Therefore, the pressing pad 20 can be adjusted up and down.

FIG. 5 shows a third embodiment, in which the upper surface of the suspension body 27 is inclined, and a wedge is provided between the suspension body 27 and the upper wall 50 of the mounting groove 11, the angle of inclination being equal to that of the suspension body 27. The upper wall 50 is inserted through the through hole 53 of the sliding plate 51 through the connecting rods 52, 52 which are installed upright on the suspension body 27, and the ends thereof are inserted. A spring 55 is interposed between the nut 54 and the upper surface of the upper wall 50, and the action of the spring 55 urges and supports the suspension body 27 toward the upper wall 50. Further, a rotary screw 57 supported on the front surface of the sanding frame 7 is attached to the front part of the sliding plate 51.
are screwed together, and the rotary screw 57 can be rotated by rotating a rotary operating portion 58 at the outer end thereof.

In this embodiment, by rotating the rotary operation section 58, the sliding plate 51 is moved in the front and back direction along the rotary screw 57, and the hanging body 27 is moved by the inclined surface of the lower surface of the sliding plate 51. This allows the pressing pad 20 to move up and down.

FIG. 6 shows a fourth embodiment in which both ends of the suspension body 27 are raised up, and a pair of parallel links 62, 62 are interposed between the raised parts 60, 60 and the upper wall 61 of the mounting groove 11. However, its upper and lower ends are rotatably supported by support shafts 62a and 62b. Also, the front rising part 6
0 is screwed with a rotary screw 64 that is inserted back and forth through an elongated hole 63 formed in the front wall of the sanding frame 7 in the vertical direction. Furthermore, a connecting piece 66 is connected to the rear rising part 60 in the horizontal direction, a lifting rod 67 is inserted into the connecting piece 66 in the vertical direction, and a nut 69a is screwed to the upper end of the connecting piece 66.
A spring 68 is attached between them, and the urging force of the spring 68 urges the lifting rod 67 upward to bring its upper end into contact with the lower surface of the upper wall 61. Due to this contact, the rear end of the suspension member 27 is urged downward. Note that the amount of upward extension of the lifting rod 67 is regulated by the lower end nut 69b.

In the embodiment, when the operating portion 65 of the rotary screw 64 is rotated, the pair of parallel links 62,
62 rotates around the support shaft a on the upper wall 61 side, whereby the rotary screw 64 moves up and down in the elongated hole 63, and at the same time, the suspension body 27 and the pressing pad 20 move up and down. . At this time, the suspension body 2
The rear end of the rod 7 is always urged downward by the spring 68, and it follows stably.

FIG. 7 shows a fifth embodiment, in which raised parts 70, 70 are formed at both ends of the suspension body 27 as in the previous embodiment.
A pair of parallel links 71, 71 is interposed between the upper wall 61 of the mounting groove 11, and the tip of a rotary screw 72 screwed into the front wall of the sanding frame 7 is connected to the front upright part. 70.
Further, two L-shaped mounting pieces 73, 73 are provided on the upper surface of the suspension body 27.
A lifting rod 74 that has the same effect as the lifting rod 67 is inserted into the hole, and a nut 75a is screwed onto the upper end of the lifting rod 74.
A spring 76 is attached between the mounting pieces 73, and the upper end of the lifting rod 74 is brought into contact with the lower surface of the upper wall 61, thereby urging the suspension member 27 downward. The amount of upward extension of this lifting rod 74 is regulated by a lower end nut 75b.
This downward bias is applied equally in the front and rear direction by the two lifting rods 74, and the parallel link pair 71, 71
will be uniformly biased clockwise. This biasing force is supported by the tip of the rotating screw 72. Therefore, the hanging body 27 and the press pad 20 are stably held, and the movement of the rotary screw 72 causes the press pad 20 to move up and down.

Next, an example of a vertical fine adjustment mechanism for the front roll 9 will be described with reference to FIG.

The mechanism shown in the figure has a front roll 9 by an eccentric shaft 80.
The front roll 9 is rotatably fitted to the main shaft 81 of the main shaft 81 via a bearing. At the front and rear ends of the main shaft 81, the main shaft 8
The front support shaft part 82a is inserted into and suspended from a bearing 83 fixed to the sanding frame 7, and an operating part 84 is attached to the front end of the support shaft part 82a. is fitted. Further, the support shaft portion 82b at the other end of the main shaft 81 is
It is supported by the sanding frame 7 via a spherical bearing 86.

Further, a drive shaft cylinder 88 in which several stages of V-pulley grooves 87 are formed is connected to the rear end of the front roll 9. An interlocking belt of a drive motor (not shown) is wrapped around the V-pulley groove 87, allowing the sanding belt to run.

With this configuration, by rotating the operating portion 84, the lower end of the front roll 9 moves up and down in accordance with the eccentricity.

The movement and elevation of the front roll 9 and the tread pad device 12 can be controlled by each of the above-mentioned vertical fine adjustment mechanisms.

Therefore, as shown in FIG.
When passing the thin belt x, the front roll 9
Then, set the tread pressure pad device 12 to the lower position and align the ground end o of the belt x to the proper position l.

In addition, as shown in FIG. 9B, if the grinding end o falls down due to the thickness of the nonwoven fabric belt y, the tread pressure pad device 12 is raised to lower the grinding end o. The front roll 9 is returned to the proper position 1, and the front roll 9 is further raised in accordance with the amount of movement. As a result, the belts x in Fig. 9 A and B,
The grinding edge o of y becomes equal. At this time, since the rear roll 10 is supported at the upper position from the beginning, there is no problem even if the rear roll 10 is fixed. Further, at this time, there is no need to move the material running device 5, the press roll 16, the material feeding regulation piece 17, etc.

<Effects of the Invention> As described above, the present invention allows the front roll 9 and the tread pad device 12 to be moved up and down, so when replacing it with the nonwoven fabric belt y, the difference in wall thickness is reduced. By moving the front roll 9 and the tread pad device 12, the ground end o of the nonwoven belt y can be returned to the reference position. Therefore, no step is created between the front roll 9 and the pad surface 13, and the edge of the wood is prevented from sagging. Moreover, it is not necessary to adjust and move various parts such as the running material device 5, the press roll 16, the material feeding regulation piece 17, etc., which are positioned in accordance with the required running material path interval. Therefore, with one wide belt sander machine, there are excellent effects such as the ability to use a thin belt x made of paper, nylon, etc. and a nonwoven fabric belt y at will.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention; FIG. 1 is a schematic front view of a wide belt sander, FIG. 2 is a front view of the tread pad device 12, and FIGS. 3 to 7 show fine vertical adjustment of the tread pad device 12. FIG. 8 is a vertical side view showing an example of the vertical fine adjustment mechanism for the front roll 9; FIG. 9A is a side view of the main parts when a thin belt x is applied; FIG. 9(b) shows the state in which the nonwoven fabric belt y is applied, and FIGS. 10(a) and 10(b) are side views showing an outline of the conventional apparatus. 5; Lumber running device, 7; Sanding frame,
9; Front roll, 10; Rear roll, 12: Pressure pad device, 13; Pad surface, 16; Pressure roll, 20; Pressure pad, 27: Hanging body, 32; Eccentric shaft, 33a, 33b; Support shaft portion , 36; Rotation operation unit, 41; Worm, 44; Adjustment screw, 51;
Sliding plate, 57; Rotating screw, 58; Rotating operation section, 6
2, 62; Parallel link pair, 64; Rotating screw, 7
1, 71; Parallel link pair, 72; Rotating screw, 8
0; Eccentric shaft, 84; Operation unit, x; Thin belt,
y; Nonwoven fabric belt.

Claims (1)

[Claims] 1. A sanding belt is passed around a belt drive mechanism provided on a sanding frame, and a tread pad device is installed between a front roll and a rear roll of the belt drive mechanism arranged on the running material path side. In a wide belt sander machine in which a pressure pad of the pressure pad device is placed in contact with the inner surface of the belt, a mounting body for supporting the pressure pad is attached to a cylinder rod of an automatic pad cylinder provided on a suspension body. and an elevating guide shaft is inserted between the suspension body and the attachment body, and the elevating and lowering of the press pad is controlled by driving the automatic pad cylinder, thereby configuring the tread pad device, A vertical fine adjustment mechanism for the tread pad device is interposed between the suspension body of the tread pad device and the sanding frame, and the front roll is supported on the sanding frame so that its vertical position can be adjusted by the vertical fine adjustment mechanism. A wide belt sander machine further characterized in that the rear roll is held at a position retracted from the running material path beyond the maximum retraction position of the pad surface of the treading pad device.