JPS6284966A - Wide belt sanding machine - Google Patents

Abstract

PURPOSE:To eliminate a difference in level to inhibit a trace from being produced at one end of a wood material, by enabling a front roll and a depressing pad device to be movably and elevatably controlled so that both are displaced upon replacement of unwoven fabric belts by an amount corresponding to a difference in thickness between the fabric belts so that the end to be ground of the wood material is returned to its reference position. CONSTITUTION:A front roll 9 and a depressing pad device 12 are movably and elevatable controlled. Further, a thin belt (x) made of paper, nylon or the like is replaced with an woven fabric belt (y). If an end O to be polished of a wood material is lowered due to the presence of a difference in thickness between the belts (x, y), the depressing pad device 12 is elevated to return the end O to be polished to an appropriate position ($1). Further, the front roller 9 is also elevated corresponding to the displacement of the device 12, and therefore, the positions (a, b) of the end to be polished on the belts (x, y) become equal to each other. At this time no disadvantage occurs since a rear roll 10 is supported and secured and a higher level. Accordingly, there is no difference in height between the front roll 9 and a pad surface 13 so that it is possible to inhibit a trace from being produced at the end of the wood material. Further, it is possible to use a thin belt (x) and an unwoven belt (y) in only one sanding machine without the necessity of adjustment and replacement of various component parts.

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., and specifically, it can be used with both thin belts made of paper, nylon, etc., and nonwoven belts. Regarding a wide belt sander machine that can be applied.

<Prior art> Normally, a sanding belt uses a thin belt made of paper, cloth, etc.
etc. apply. However, recently, polishing of the surface to be ground,
Nonwoven fabric belts have come to be used to improve the finish and to make the paint surface more beautiful. By the way, this nonwoven fabric belt y has a wall thickness of 5 to 10 mm, and for example, as shown in FIG.
If the nonwoven fabric belt y is used as is, the ground end 0 of the nonwoven fabric belt y will protrude toward the running material path. Correspondingly, in order to obtain the required cutting thickness, a constant material device d facing the treading pad device C must be provided by the increased thickness.
It is necessary to move it in the separating direction.

However, due to the movement of the treading pad device 21C, the pad surface f tends to protrude from between the front roll e and the rear roll g, and the inclination of the sanding belt stretched between the front roll e and the treading pad f changes. It becomes large and eats away at the edges of the wood, causing edge wobbling.

Further, a pressure roll h is provided before and after the tread pad device C, and as the sizing device d moves in the separating direction, the distance between the pressure roll h and the sizing surface of the sizing device d increases. Become. For this reason, the pressing force of the pressing roll h is weakened, and the workpiece cannot be pressed against the straightening 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.

By the way, the position adjustment of this suppression roll h and the material feeding regulation piece i
Since the amount of position adjustment is small, it is virtually impossible to adjust the position, and it is often impossible to eliminate the above-mentioned disadvantages.

These technical problems also apply to the bottom surface grinding type wide belt sander, as shown in Figure 1θ. In this case, in response to the movement of the suppression pad device C,
The movement of the guide table j at the front of the guide table J is to be adjusted, but the ability to raise and lower the guide table l is the smallest, and as mentioned above, this is often not possible.

In addition, there are top surface grinding types with a guide table j installed at the top, bottom surface grinding types with a suppression roll h installed at the bottom, etc.
Similar problems occur with various wide belt sanders.

For this reason, the current situation is that conventional wide belt sanders are designed specifically 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 provides a belt drive provided on a sanding frame! h
A sanding belt is passed through the mechanism, and a tread pad device is arranged between the front roll and rear roll of the belt drive mechanism arranged on the short material path side, and the tread pad of the tread pad device is attached to the inner surface of the belt. In this wide belt sander, both the front roll and the tread pad device are supported on a sanding frame so that their vertical positions can be adjusted by a vertical movement mechanism, and the rear roll is attached to the pad surface of the tread 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.

When changing from a thin belt (X) to a non-woven belt y and the pad surface of the treading pad device protrudes from the reference position to the short material path side, the treading pad device can be adjusted by the increased thickness of the belt. The rollers are moved in the direction of separation by an appropriate amount, and are placed in an appropriate position relative to the pressure roll, etc. Correspondingly, the front roll is also moved by an equal amount in the S-opening direction. 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 embodiment of the invention will now be described with reference to the accompanying drawings.

FIG. 1 shows a top surface cutting type wide belt sander machine, and a cutting material device 215 is provided at the lower part of a main body frame 1, in which a cutting material belt 4 is stretched between traveling rolls 2.3. Further, a sanding frame 7 is provided on one main body frame l at an upper position of the straightening 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) IO are provided at the lower end of the steering roller 8 to drive a drive mechanism. It consists of Further, a treading pad device 12 is fitted in the mounting groove 11 formed in the sanding frame 7 between the rolls 9 and 10, and each roll and the treading pad device 12
A sanding belt (X, Y) is stretched around the pad surface 13 of
A running material passage 14 is formed between them.

Further, a pressure roll 16 is provided above the running material path before and after the sanding frame 7, and is pressed toward the straightening device 5 by a bullet 4115. Furthermore, the running material passage 1
At the entrance of 4, a material feeding regulating piece 17 is vertically installed 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 denotes a pressure pad fixed to the movable base 21, which has an air bag (not shown) inside the frame 22, has an elastic plate 23 such as a sponge fixed to its lower end, and is attached to a pad cloth 24. It has a known structure covered with a pad, and the bottom surface thereof is used as a pad 3. 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 has a lifting guide 1h2 with respect to the hanging body 27.
8.28, it is suspended so that it can move relative up and down.

Further, an automatic pad cylinder 29 is mounted on the upper part of the suspension body 27, and the cylinder operates when the workpiece comes directly under the pad surface 13, lowering the pressing pad 2O. 17. As the workpiece passes, the operation is released, and the suppression pad 20 moves back downwards due to the restoring elasticity of the spring built into the lifting guide shaft 28, 28.

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

The front and rear ends of the suspension body 27 stand up upward, and an eccentric shaft 32 is rotatably supported at the rising ends 30 and 30 by a bearing 31. Support shaft portions 33a and 33b connected to the front and rear ends of the eccentric shaft 32 are eccentric with respect to the main shaft portion 34 of the eccentric shaft 1i132. The support shaft portions 33a, 33b are pivotally supported by bearings 35a, 35b connected to the sanding frame 7, and a rotation operation portion 36 is provided at the front end of the front support shaft portion 33a protruding from the front bearing 35a. Fixed.

When the rotation operation section 36 is manually rotated, the support shaft section 33a
, 33b and the eccentricity of the main shaft portion 34, the suspension body 27
moves, causing the mounting body 26 and the pressing pad 20 to move up and down.

FIG. 4 shows a second embodiment of the vertical movement mechanism of the tread pressure pad device 12, in which a worm 4 mounted on the upper wall 40 of the mounting groove 11 of the sanding frame 7 and rotatably supported.
A screw rod 43.43 is formed extending from the lower end of a shaft 42.42 of 1.41, and the screw rod 43.43 is screwed to the front and rear ends of the suspension body 27. the worm 41,
41 is threadedly 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 such a mechanism, when the adjustment screw 44 is rotated, the worm 41.41 is rotated, and the suspension body 27 is rotated by the screw rod 43.41.
It is raised and lowered by the feeding action of 43. Therefore, it is possible to adjust the pressure pad 20 up and down.

FIG. 5 shows a third embodiment, in which the upper surface of the hanging support 27 is inclined, and a wedge is provided between the hanging support 27 and the earth wall 50 of the mounting groove 11 with the same inclination angle as that of the hanging support 27. Shape sliding plate 51
A connecting rod 52.52 erected on the suspension body 27 is inserted through the upper wall 50 through the through hole 53 of the sliding plate 51, and a nut 54 at the end thereof is inserted. A spring 55 is interposed between the upper surfaces of the upper 750, and the action of the spring 55 urges and supports the hanging body 27 toward the upper wall 50. Further, a rotary screw 57 supported on the front surface of the sanding frame 7 is screwed into the front part of the sliding plate 51, and by rotating a rotary operation part 58 at the outer end, the rotary screw 57 is screwed into the front part of the sliding plate 51.
It is designed to be able to rotate.

In this embodiment, by rotating the rotary operation part 58, the sliding plate 51 is moved in the front and back direction along the rotary screw 57, and the hanging body 2 is moved by the inclined surface of the lower surface of the sliding plate 51.
7 is moved up and down, and thereby the suppression pad 20 can be moved up and down.

FIG. 6 shows a fourth embodiment, in which both ends of the hanging support 27 are raised, and the raised parts 60, 60 and the earthen wall 61 of the mounting groove 11 are
A pair of parallel links 62 and 62 are interposed between the support shafts 62a,
62b, the upper and lower ends of which are rotatably supported. In addition, a sanding frame 7 is provided on the front rising part 60.
A rotating screw 64 inserted back and forth through an elongated hole 63 in the vertical direction formed in the front wall of the housing is screwed together. Furthermore, a connecting piece 66 is connected in the horizontal direction to the rear upright part 60, and a lifting rod 67 is inserted into the connecting piece 66 in the vertical direction and is screwed to the upper end thereof. A spring 68 is attached between the springs 66 and the urging force of the spring 68 urges the lifting rod 67 upward, so that the upper end thereof is brought 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 above embodiment, when the operating portion 65 of the rotary screw 64 is rotated, the parallel link pair 62° 62 moves upward 76
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 rear end of the suspension body 27 is always urged downward by the spring 68, and it follows stably.

FIG. 7 shows a fifth embodiment, in which a pair of parallel links 71.71 are provided between the raised parts 70.70 formed at both ends of the suspension body 27 and the earthen wall 61 of the mounting groove 11 as in the previous embodiment. The tip of a rotary screw 72 screwed into the front wall of the sanding frame 7 is brought into contact with the raised portion 70 at the front.

In addition, two L-shaped pieces 73 are attached to the upper surface of the suspension body 27.
．． A lifting rod 74 which has the same effect as the lifting rod 67 is inserted into the piece 73.73, and a nut 75a is screwed to the upper end of the lifting rod 74. Attach it.

The upper end of the lifting rod 74 is brought into contact with the lower surface of the upper wall 61, and the hanging support 2
7 is biased downward. The amount of upward extension of this lifting rod 74 is regulated by a lower end nut 75b. This downward bias is uniformly applied in the front and rear directions by the two lifting rods 74,
The parallel link pair 71°71 is uniformly biased clockwise.

This biasing force is supported by the tip of the rotating screw 72. Therefore, the hanging body 27 and the pressure pad 20 are stably held, and the movement of the rotary screw 72 causes the pressure pad 20 to move up and down.

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

The mechanism shown in the figure moves the front roll 9 up and down using an eccentric shaft 80, and the front roll 9 is rotatably fitted onto the main shaft 81 via a bearing. The main shaft 8
Support shaft portions 82a and 82b that protrude eccentrically from the main shaft 81 are quickly formed at the front and rear ends of the sanding frame 1, and the front support shaft portion 82a is inserted into and suspended from a bearing 83 fixed to the sanding frame 7. An operating section 84 is fitted to the front end thereof. Further, a support shaft portion 82b at the other end of the main shaft 81 is supported by the sanding frame 7 via a spherical bearing 86.

Also, at the rear end of the front roll 9, there are several stages of V pulleys 11.
A drive shaft cylinder '88 in which It87 is formed is connected. 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 section 84,
The lower edge of the front roll 9 moves up and down in accordance with the amount of 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 drive mechanisms.

Therefore, as shown in FIG. 9A, when the thin bell) Then, set the treading pad device 12 to the lower position and align the grinding end 0 of the bell) X to the proper position.

In addition, as shown in FIG. 9, when the grinding end 0 of the nonwoven fabric belt y is suspended due to its thickness, the tread pressure pad device δ12 is raised to raise the grinding end 0 of the nonwoven fabric belt y.
is returned to the proper position of 22, and furthermore, in response to this shift, the front roll 9 is raised upward. This results in belt X with nine openings in Figure 9A.

The grinding edge 0 of y becomes equal. At this time, the rear roll lO
Since it is supported at the bottom position from the beginning,
There is no problem even if it is fixed, and in this case, the sizing device 5. Press roll 16. There is no need to move the material feeding regulating piece 17 or the like.

<Effects of the Invention> As described above, the present invention makes it possible to control the movement and elevation of the front roll 9 and the treading pad device 12. Therefore, when replacing the nonwoven fabric belt y with the nonwoven fabric belt y, the difference in wall thickness is reduced. Front roll9. By moving the pressure pad device 12,
The ground end O of the nonwoven fabric bell) 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 wobbling. In addition, the constant material device 5
, pressure roll 16. There is no need to adjust and move various parts, such as the material feeding regulation piece 17, which are positioned in accordance with the required material path spacing.Therefore, one wide belt sander machine can handle thin belts X of paper, nylon, etc. It has excellent effects such as being able to use non-woven fabrics as desired.

[Brief explanation of drawings]

The attached drawings show embodiments of the present invention, and FIG. 1 is a schematic front view of a wide belt sander, and FIG.
! 112, FIGS. 3 to 7 are vertical cross-sectional side views of the embodiment showing the vertical movement mechanism of the treading bat device 12, FIG. 8 is a vertical cross-sectional side view showing an example of the vertical movement mechanism of the front roll 9, and FIG.
Figure A is a side view of the main part with thin belt X applied, Figure 9 is a side view of the main part with thin belt
Figure A7 is a side view showing an outline of the conventional bag. 5; Fixed material δ 7; Sanding frame 9; Front roll 10; Rear roll 12: Pressure pad device 13
．． Pad surface 16; Press roll 20; Press pad 2
7; Hanging body 32: Eccentric shafts 33a, 33b; Support shaft portion 36-Rotation operation portion 41; Worm 44; Adjustment screw 51; Sliding plate 57: Rotation screw 58; Rotation operation portion 6
2,62. Parallel link pair 64: Rotating screw 71, 71
．． Parallel link pair 72: Rotating screw 80; Eccentric shaft 84
;Operation part

Claims (1)

[Claims] A sanding belt is passed around a belt drive mechanism provided on a sanding frame, and a tread pad device is arranged between the front roll and rear roll of the belt drive mechanism arranged on the running material path side. In a wide belt sander in which a treading pad is brought into contact with the inner surface of the belt, both the front roll and the treading pad device are supported on a sanding frame so that their vertical positions can be adjusted by a vertical movement mechanism, and furthermore, the rear roll is A wide belt sander characterized in that a pad surface of a treading pad device is held at a position retreated from a running material path at a position greater than the maximum retreat position of the pad surface.