JPH075972Y2 - Belt sander polishing structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt sander used for polishing woodworking boards.

[0002]

2. Description of the Related Art As a belt sander for polishing a woodworking plate material, there is, for example, one disclosed in Japanese Patent Publication No. 51-48312, the outline of which will be described with reference to FIG.
That is, 1a and 1b are standing frames that are provided opposite to each other. Two pulleys 2a and 3a, and 2b and 3b are mounted on each of the standing frames 1a and 1b, and one of the standing frames 1a is for driving. Then, a pair of pulleys 2a,
2b is a polishing belt 4 and another pair of pulleys 3a,
A dust belt 5 is wound around 3b, and these two belts are used as a polishing belt 6. 7 is two standing frames 1
It is a horizontal frame installed between a and 1b. A large number of pneumatic cylinders 8 are arranged in a row on the horizontal frame 7 through appropriate holders, and a piston rod 8a of each cylinder 8 is provided.
A pad row 9 ... Is formed by fixing the pressing pad 9 to the. 10 is the pad row 9 ... And the polishing belt 6
In addition, the buffer pressing mechanism band stretched between the compatible frames 1a and 1b is provided with appropriate flexibility, and the details are described in, for example, Japanese Utility Model Publication No. 60-17941. Is disclosed in. Reference numeral 11 denotes a horizontal workbench, which can be moved up and down and forward and backward.

When using the sander, a workbench 11 is used.
The woodworking plate material is placed on the upper surface of, and the workbench 11 is moved appropriately to position the woodworking plate material immediately below the polishing belt 6. Next, the pneumatic cylinders 8 ... Within a certain range determined according to the width of the woodworking plate material are operated. Each of the cylinders 8 ... Operated in this way lowers the pressing pad 9 as the piston rod 8a thereof descends, and at the same time, these pressing pads 9 ...
-Presses the polishing belt 6 on its lower surface via the buffer pressing mechanism belt 10, and the lower surface of the belt 6 is brought into contact with the surface to be processed of the woodworking plate material with an appropriate pressure.

[0004]

In the above-described belt sander, the height of each pressing pad 9 has a sensitive influence on the polishing process. Therefore, it is desired that the height of each pressing pad 9 can be adjusted easily, quickly and accurately.

The present invention meets the above-mentioned needs.
It is an object of the present invention to provide a belt sander that can more easily carry out uniform polishing treatment than ever before.

[0006]

In order to achieve the above object, the present invention has an endless polishing belt which is wound between pulleys which are opposed to each other in a horizontal plane, and which is provided inwardly of the belt. Pneumatic cylinders are provided in a row, and a pad row for pressing the belt is formed by fixing a pressing pad to each piston rod of the cylinder, and a buffer pressing mechanism band is provided between the pad row and the belt. In the belt sander in which each of the pneumatic cylinders is provided, a male screw in the direction of the central axis is engraved within a certain range on the outer periphery of the cylinder member of each pneumatic cylinder, and a nut body for adjusting operation is screwed into the screw, The holder for supporting the fixed height of the holder is provided with a cylindrical portion having a vertical hole in which the peripheral wall is cut in the central axis direction, and the diameter of the vertical hole can be expanded and contracted by strain deformation. A child is provided, and a cylinder member is inserted into the vertical hole to hold the peripheral surface of the same member by a fastening operation of the screw, and the lower end of the nut body is supported on the upper end surface of the tubular portion. And

[0007]

The vertical hole of the holder is expanded in diameter by loosening the fastening screw, and the vertical displacement of the pneumatic cylinder is allowed. The nut body is rotated to move the outer circumference of the cylinder member in the direction of its center line, that is, in the vertical direction, while the lower surface of the nut body is supported at a constant height by the upper end surface of the holder. As a result, the entire pneumatic cylinder and pressing pad are vertically displaced by the screwing dimension of the nut body. When the tightening operation screw is tightened, the vertical hole is reduced in diameter and the cylinder member is fixed. As a result, the vertical position of each pressing pad is adjusted and the pressing force thereof is finely adjusted, so that the abutting force of the polishing belt on the object to be processed is made more appropriate, and a more uniform polishing process is possible.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 7 relate to the present invention, and in the drawings, the same parts as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

In the figure, reference numerals 12a and 12b denote guide members fixed to the horizontal frame 7 and are provided with guide holes (not shown). Sliding rods 13a and 13b are fitted into the guide holes, support members 14a and 14b are fixed to the guide holes, and end portions of the buffer pressing mechanism band 10 are fixed to these two members 14a and 14b, and not shown. A pneumatic cylinder is provided, and the buffer pressing mechanism band 10 is vertically displaced within a certain range by vertically moving the support members 14a and 14b by the cylinder. The buffer pressing mechanism band 10 is, for example, as shown in FIG.
It can be formed by providing a and sandwiching the pneumatic tube 10b between them.
It is stretched between the support members 14a and 14b according to the means disclosed in Japanese Patent Publication No. 17941.

A large number of pneumatic cylinders 8 are provided on the horizontal frame 7.
A is fixed in a row through the holder 15. At this time, each pneumatic cylinder 8A is specifically configured as shown in FIG. That is, 16 is a cylinder member formed into a cylindrical body, and a male screw 16a in the direction of the central axis is formed on one end side of the outer periphery of the cylinder member, and a through hole 16b in a state of penetrating the peripheral wall is formed below the screw 16a. Set up. Reference numeral 17 denotes a head cover having an air supply hole 17a formed in the center thereof, which is screwed to the cylinder member 16 in an airtight state via a male screw 16a and a packing 18. Reference numeral 19 denotes a piston which is slidably fitted inside the cylinder member 16, and has a central screw hole 19a at which the upper end of a piston rod 8a having a male screw s1 formed at its lower end is screwed. . A cover member 20 having a guide hole for inserting the piston rod 8a is fitted in the lower end side of the cylinder member 16 and a retaining ring 21 is attached to prevent the cover member 20 from coming out. A spring 22 for pressing the piston 19 upward is provided between the cover member 20 and the piston 19. Reference numeral 23 denotes an adjusting operation nut body screwed to the male screw 16a, and a non-slip pattern is engraved on the peripheral surface. 24 is a packing which forms a piston ring, and 25 is a dust seal. On the other hand, the holder 15 has a cylindrical portion 15 as shown in FIG.
It is formed by a main body member 15A including a and a fixed base portion 15b and a fastening operation screw 15B. The cylindrical portion 15a forms a vertical hole H1 and has a slit 26 in the central axis direction on its peripheral wall, and the fastening operation screw 15B is screwed into a thick portion sandwiching the slit 26. The hole H2 and the female screw s2 are not formed in a direction intersecting with the vertical hole H1, and the fixing base portion 15b forms a surface P1 that is brought into contact with the horizontal frame 7 and the horizontal frame. Two female screws s3, s3 into which bolts for fixing to 7 are screwed are provided. Further, the fastening operation screw 15B is provided with a male screw portion s4 and an operation knob portion T, which are provided with a hole H2 and a female screw s.
By screwing with 2, the gap of the slit 26 can be reduced by strain deformation. In order to support the pneumatic cylinder 8A on the holder 15, the cylinder member 16 is fitted inside the vertical hole H1 and then the fastening operation screw 15B is tightened to reduce the diameter of the vertical hole H1 and to perform an adjusting operation. The lower surface of the nut body 23 is brought into contact with the upper end surface of the tubular portion 15a to regulate the vertical position of the pneumatic cylinder 8A.

Further, a pressing pad 9A is fixed to the piston rod 8a of each pneumatic cylinder 8A, and a pad row 9A.
.. is formed. At this time, each pressing pad 9A is made as shown in FIG. 5, that is, the overall shape is made into a substantially rectangular plate shape, and a plurality of concave and convex portions are provided at each end p2, p3 to which another pressing pad is adjacent. To form. The uneven portion may have any shape, but in the present embodiment, one end p2 is provided with two convex portions k1 and three concave portions k2,
Further, the other end p3 has three protrusions k1 and two recesses k2.
Is provided. Here, H3 is a through hole for inserting the screw portion s1 of the piston rod 8a, and H4 is a hole for locating a nut to be screwed into the screw portion s1. It should be noted that p4 is a portion to which a member for detecting the position of the pressing pad 9A is fixed and a hole H5 is provided. Then,
As shown in FIG. 6, a large number of pressing pads 9A are formed by fitting the concave and convex portions in a male and female relationship and connecting them so that their lower surfaces are flush with each other to form a pad row 9A.

Further, the workbench 11 is provided with an up-and-down drive device 27 at an appropriate position thereof, for example, a central portion. The vertical drive device 27 is for vertically displacing the object w to be processed placed on the workbench 11, and a pneumatic cylinder is used in this embodiment, and specifically, it is performed as follows. That is, as shown in FIG. 7, the pneumatic cylinder 27 is fixed to the back surface of the worktable 11 by bolts 28, and the piston rod 30 is arranged inside the through hole 29 provided in the worktable 11 and pressed against the tip thereof. The child 31 is fixed and the pusher 31
At the lowermost position, the upper surface p5 thereof coincides with the upper surface of the work table 11, and at the uppermost position, the upper surface p5 rises by at least several cm. In this case, it is preferable that the tip of the pressing member 31 is formed of a supporting member 31a that is rotatable about the vertical axis, and the upper surface p5 is formed of a soft elastic body such as rubber.

Next, the operation of the above embodiment will be described. After the apparatus is in the operating state and the pressing element 31 is set in the hole 29, the woodworking board material w is placed on the upper surface of the work table 11 just above the pressing element 31. Similarly, the workbench 11 is moved to position the woodworking plate material w immediately below the polishing belt 6. Next, a pair of support members 14a,
The buffer pressing mechanism belt 10 is operated by lowering 14b.
Are located in the vicinity of the upper surface of the polishing belt 6, and at the same time, the pneumatic cylinders 8A ... The pressure pad 9A fixed to ... Is lowered. This allows pad row 9A ...
The part of a certain range of * presses the buffer pressing mechanism band 10, and the buffer pressing mechanism band 10 causes the lower surface of the polishing belt 6 to contact the surface to be processed of the woodworking plate material w. Since the plurality of pressing pads 9A ... In the lowered range are connected to each other without a break 26 via the concave and convex portions (convex portion k1 and concave portion k2) of each pressing pad 9A, the buffer pressing mechanism band is formed. 10 is pressed by the pad row 9A, which presses it, with a pressure evenly distributed over its entire length. Therefore, the woodworking plate material w is subjected to a uniform polishing treatment by abutting the polishing belt 6 on the entire surface to be treated with a uniform pressure. Further, even if the surface to be treated is stepped, it is continuous. The pressing pads 9A ... Have a less uneven distribution of abutting force as compared with the case where they are not, and enable relatively good polishing. After performing the required polishing treatment on the woodworking board material w, the work table 11 is moved to an appropriate position to handle the woodworking board material w appropriately. In this case, the pneumatic cylinder 27 is used.
If the pressing member 31 is moved up by operating the button, even if the woodworking board material w is heavy, it is possible to easily insert and grasp the finger on the lower surface side and grasp the direction. When it is desired to change it, it can be easily done by simply rotating the woodworking plate material w while supporting it on the presser 31 without lifting it.

By the way, when it is found that the pressing force of the specific pressing pad 9A is not appropriate, for example, by judging from the polished woodworking plate material w, the adjusting operation nut body 23 is rotated and the cylinder member thereof is rotated. 16 is vertically displaced by an appropriate amount and the fastening operation screw 15B is loosened to expand the vertical hole H1 of the holder 15 so that the position of the pneumatic cylinder 8A with respect to the holder 15 can be changed. The lower surface of the body 23 is attached to the tubular portion 15
The upper end surface of a is abutted, and then the tightening screw 15B is tightened to reduce the diameter of the vertical hole H1.
6 is fixed to the holder 15. Even if the position adjustment of the pneumatic cylinder 8A is minute, the position can be surely and accurately adjusted, and the pressing force of the pressing pad 9A related to the cylinder 8A can be set easily, quickly and appropriately.

[0015]

As described above, according to the present invention as set forth in claim 1, since the vertical position of each pneumatic cylinder is changed by the rotational operation of the adjusting operation nut body and the tightening operation screw, the pressing force of each pressing pad is changed. The adjustment can be performed easily, quickly, properly and surely even if it is a minute adjustment, and a more uniform polishing treatment of the woodworking board material can be achieved.

Further, according to the present invention as set forth in claim 2, since the plurality of pressure pads that have been lowered are in a continuous state through the concave and convex portions, the buffer pressure mechanism is formed by the entire length of the pad row by the plurality of pressure pads. The strip can be pressed in a state in which uneven distribution of pressing force is unlikely to occur, and the woodworking plate material can be further uniformly polished.

[Brief description of drawings]

FIG. 1 is a front view of a belt sander according to the present invention.

FIG. 2 is a perspective view showing the periphery of a pneumatic cylinder 8A and a buffer pressing mechanism band 10 of the belt sander.

FIG. 3 is a sectional view of the left half of the pneumatic cylinder 8A.

4 (a) to (c) relate to a holder 15, (a)
Is a plan view (b) is a side view and (c) is a rear view,
Further, (d) is a plan view of the screw for fastening operation.

FIG. 5 is a plan view (b) of FIG.
Is a side view (c) is a sectional view taken along the line AA, and (d) is a rear view.

FIG. 6 shows a row of pressing pads 9A, (a) is a plan view and (b) is a front view.

FIG. 7 is a front view showing the periphery of a vertical drive device 27 and showing a part as a cross section.

FIG. 8 is a front view showing a conventional belt sander.

[Explanation of symbols]

 2a and 2b Pulley 3a and 3b Pulley 6 Polishing belt 8A Pneumatic cylinder 8a Piston rod 9A Pressing pad 10 Buffer pressing mechanism band 11 Working table 15 Holder 15B Fastening screw 15a Cylindrical part 16 Cylinder member 16a Male screw 23 For adjusting operation Nut body 26 Cut 31 Presser k1 Projection k2 Recess H1 Vertical hole p2 and p3 End of pressing pad

Claims (3)

[Scope of utility model registration request] 1. An endless polishing belt is wound around pulleys which are opposed to each other in a horizontal plane, and pneumatic cylinders are arranged in a row along the inner side of the belt, and pistons of the respective cylinders are arranged. In addition to forming a pad row for fixing the pressing pad on the rod to press the belt, in the belt sander in which the buffer pressing mechanism band is arranged between the pad row and the belt, A male screw in the direction of the central axis is engraved within a certain range on the outer circumference of the cylinder member of the cylinder, and a nut for adjusting operation is screwed into the screw, and a holder for supporting each of the cylinders has a peripheral wall as the central axis A cylindrical portion having a vertical hole cut in a direction is provided, and a fastening operation screw that can expand and contract the diameter of the vertical hole by strain deformation is provided, and a cylinder member is inserted into the vertical hole. A polishing processing part structure for a belt sander, characterized in that the peripheral surface of the member is held by the screwing operation and the lower surface of the nut body is supported on the upper end surface of the tubular part. 2. A concavo-convex portion that moves in and out in a horizontal direction is formed at each end of each pad in the pad row direction, and the concavo-convex portions of adjoining pressing pads are fitted in a male and female relationship. The structure of a polishing portion of a belt sander according to claim 1. 3. A vertical drive device is provided at an appropriate place on the lower surface of a work table which is arranged below the polishing belt so as to be movable in two directions, a direction orthogonal to the polishing belt and a vertical direction.
A vertical through hole is provided in the work table, and a pusher that is vertically moved by the drive unit is located in the hole, and the pusher has a predetermined size from the upper surface of the work table by the operation of the drive unit. The polishing processing part structure of the belt sander according to claim 1 or 2, wherein the polishing processing part is projected or recessed.