JPH0750138Y2 - Belt sander machine - 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 machine for grinding and polishing the surface of a work made of metal or the like with a polishing belt.

[0002]

2. Description of the Related Art In this type of sander, an endless polishing belt is stretched between a plurality of rollers to run the polishing belt, and the polishing belt is pressed against the surface of the workpiece fed by a material feeding device to polish the workpiece. It is a structure that does. In this case, in order to press the polishing belt against the work, a platen is provided between the rollers, and the platen is urged by the cylinder.

By the way, when the polishing belt runs and the work is ground, chips are generated along with this. If left unattended, the chips gradually stick to both the front and back surfaces of the polishing belt and the platen surface, gradually obstructing the grinding. Therefore, in the past, for example, the actual exploitation Sho 63-176063
As shown in Japanese Patent Publication No. JP-A-2003-264, there is considered a configuration in which a passage for a cleaning liquid such as water is provided in the platen, and the cleaning liquid is supplied from the liquid supply port on the platen surface to the space between the platen and the polishing belt through this passage. . According to this, since the cleaning liquid supplied from the liquid supply port forms a liquid film and is located between the platen and the polishing belt, even if chips generated from the work adhere to the platen or the polishing belt. However, this can be immediately washed away with a cleaning liquid, so that it is possible to effectively prevent the chips from sticking to each other, and also contribute to the cooling of the polishing belt and the platen.

[0004]

However, in the platen of the above-mentioned conventional belt sander machine, the cleaning liquid does not spread sufficiently evenly over the entire surface of the platen, and if it is operated for a long time, the surface of the platen and the polishing belt are There was a problem that the chips would stick to them.

Therefore, an object of the present invention is to make it possible to sufficiently spread the cleaning liquid supplied between the platen and the polishing belt over the entire area of the platen, so that it is possible to reliably prevent the chips from sticking to the belt. It is to provide Sanda machine.

[0006]

The belt sander of the present invention has a platen formed with a liquid supply port for supplying a cleaning liquid between the platen and the polishing belt, and the surface of the platen that contacts the polishing belt. Is characterized in that a liquid storage groove which is continuous with the liquid supply port is formed and the liquid storage groove is inclined with respect to the traveling direction of the polishing belt.

[0007]

When the polishing belt of the belt sander is run and is pressed against the work by the platen, the work is polished. The chips generated along with this adhere to not only the front surface side of the polishing belt but also the back surface side.

On the other hand, the platen is provided with a liquid supply port, and the surface of the platen which is in contact with the polishing belt is provided with a liquid storage groove which is continuous with the liquid supply port. The cleaning liquid is supplied to almost the entire back surface of the polishing belt while filling the liquid storage groove, and the chips adhering to the back surface of the polishing belt are washed away. In this case, since the liquid storage groove is inclined with respect to the running direction of the polishing belt, the liquid storage groove is in line contact with the polishing belt so that the cleaning liquid is uniformly supplied over a wide range of the polishing belt. become. Further, since the liquid storage groove has a shape that is inclined with respect to the traveling direction of the polishing belt, the cleaning liquid in the liquid storage groove flows and is discharged along with the polishing belt and is always replaced with a fresh one as the polishing belt travels. , The polishing belt and platen are efficiently cleaned.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a belt sander machine for metal working will be described below with reference to FIGS.

As shown in FIG. 4, a material feeding frame 12 extending in the horizontal direction and a vertical frame 13 extending in the vertical direction are fixed to the upper portion of the base frame 11. A drive roller and a driven roller (not shown) are provided on the material feeding frame 12, and a material feeding belt 14 constituted by a sanding belt is hung between them, and the work placed on the material feeding belt 14 is shown in FIG. It can be moved from the front side to the back side.

On the other hand, the vertical frame 13 is provided with two polishing heads 15 (only one is shown) so as to project above the material feeding frame 12. Each polishing head 15 has a driving roller 16 and two driven rollers 17, 18
And a polishing belt 19 in which a large number of through holes 19a are formed is stretched between these rollers. The polishing belt 19 can be moved in the direction of the arrow in FIG. 4 by driving the driving roller 16 by the grinding motor 20 fixed to the upper part of the polishing head 15, and this direction is the same as the moving direction of the material feeding belt 14. It is a crossing direction.

A tread pad device 21 is provided in the polishing head 15 between the driving roller 16 and the driven roller 17, and the platen 22 of the tread pad device 21 positions the polishing belt 19 above the material feeding belt 14. Is pressed down. This tread pad device 21 is
The structure in which the steel platen 22 is pushed down by the air cylinder 23 is described below in detail with reference to FIG.

First, the mounting board 2 is attached to the vertical frame 13.
5 is fixed and a pair of supporting frames 2 having an L-shaped cross section
6 are attached at intervals so as to extend in the horizontal direction. The inner surfaces of the two support frames 26 facing each other have an inclined shape in which the facing distance increases toward the upper side, and the platen mounting plate 27 is disposed therebetween. The platen mounting plate 27 is fixed to the lower end portion of the rod 28 of the air cylinder 23, and both side surfaces thereof have an inclined shape in which the facing distance becomes wider toward the upper side like the facing inner surface of the support frame 26. Therefore, the platen mounting plate 27 can be moved up and down by operating the air cylinder 23. In this case, the lower limit position is that the side surface of the platen mounting plate 27 is on both support frames 2.
The platen mounting plate 27 is normally pushed down to the lower limit position for contacting the facing inner surface of the plate 6, and grinding is performed.

The platen 2 is attached to the lower surface of the platen mounting plate 27.
2 is removably attached to the back surface of the polishing belt 19. The mounting structure of the platen 22 uses a wedge-shaped locking body 29 as shown in FIG. 5, and the lever 30 is operated to pull up the wedge-shaped locking body 29 via the screw rod 31 so that the platen 22 is moved to the platen 22. It is fixed to the mounting plate 27.

Although not shown in order to avoid complication of the drawing, the air cylinder 23 is connected to an air source through a pipe line, and the air cylinder 23 is provided in the air cylinder 23 by an air regulator and a pressure relief valve. A constant pressure is always supplied.

The inside of the platen 22 is shown in FIG.
3, a liquid supply passage 32 is formed, and a liquid supply hose 33 from a cleaning liquid pump (not shown) for supplying a cleaning liquid such as water is connected to the liquid supply passage 32 (see FIG. 3).
The liquid supply path 32 is provided on the surface of the platen 22 on the side of the polishing belt 19.
Is formed with a plurality of liquid supply ports 34. A plurality of linear liquid storage grooves 35 are formed on the surface of the platen 22 that is in contact with the polishing belt 19 and are connected to the liquid supply port 34. (Indicated by an arrow in the figure). Further, as shown in FIG. 1, each liquid storage groove 35 is provided with two liquid supply ports 34, except for one on each of the left and right sides of the platen 22, and the polishing belt 19 is provided.
There is a relationship such that the two liquid storage grooves 35 overlap with respect to the traveling direction of.

Next, the operation of this embodiment will be described.
The work is sent on the material feed belt 14, reaches below the tread pad device 21, and is abraded by the abrading belt 19. In this case, the platen mounting plate 27 is pushed down by the air cylinder 23 until it comes into contact with the support frame 26,
Since the lower surface of the platen 22 and the upper surface of the material feeding belt 14 are kept at a constant distance, the grinding amount applied to the work is always constant. However, for example, when a work having an abnormally large thickness than the standard specifications is erroneously sent, the platen 22 is strongly pushed up by the work, the internal pressure of the air cylinder 23 is increased, and the pressure relief valve is used. The pressure is released. Therefore, the platen 2
2 is retracted upward so as to escape from the work, and excessive stress is prevented from acting on the tread pad device 21, the material feeding device, and the like.

When the polishing of the work as described above is repeated, the chips generated by the polishing fly up and adhere to the polishing belt 19 and the platen 22. They are,
If left unattended, it gradually sticks to both the front and back surfaces of the polishing belt 19 and the surface of the platen 22, which gradually hinders grinding and causes a problem that the life of the polishing belt 19 is significantly shortened.

In this regard, according to this embodiment, the platen 22
Since the cleaning liquid is supplied to the back surface side of the polishing belt 19 from the liquid supply port 34, the cleaning liquid spreads over the entire contact surface between the polishing belt 19 and the platen 22.
9 through the through holes 19a to reach the surface side of the polishing belt 19 and spread over the entire contact surface between the polishing belt 19 and the workpiece. Therefore, the chips adhering to the polishing belt 19, the platen 22, the work, etc. are washed away by these cleaning liquids, and it is possible to prevent the chips from sticking firmly.
Here, since the cleaning liquid supplied from the liquid supply port 34 of the platen 22 once fills the liquid storage groove 35, the cleaning belt 19 comes into linear contact with the polishing belt 19 and the polishing belt 1
It will be distributed uniformly over the entire area of No. 9.
As a result, the entire area of the polishing belt 19 is uniformly washed. Moreover, the liquid storage groove 35 is formed by the polishing belt 19
Since the polishing belt 19 has a shape inclined with respect to the traveling direction, the cleaning liquid filled in the grooves 35 is forcibly made to flow in the traveling direction of the polishing belt 19 as the polishing belt 19 travels, and The end portion is discharged by being scraped off by the polishing belt 19. As a result, the liquid storage groove 3
The cleaning liquid in 5 is always replaced with fresh one supplied from the liquid supply port 34, and even a large amount of chips can be efficiently cleaned and removed.

When forming the liquid storage groove, it may be possible to form the liquid storage groove so as to extend along the running direction of the polishing belt 19. However, in this case, the polishing belt 19 and the liquid storage groove are in point contact with each other. Therefore, it is not preferable because the cleaning liquid is evenly supplied to the entire area of the polishing belt 19. Also,
On the contrary, it is conceivable to form the liquid storage groove by extending it in the direction orthogonal to the traveling direction of the polishing belt 19, and this also provides the line contact state with the polishing belt 19. However, in this configuration, the cleaning liquid in the liquid storage groove hardly flows even when the polishing belt 19 travels, and the cleaning liquid in the liquid storage groove tends to stay in the groove, which is the reason for the cleaning efficiency. Is inferior to the composition of.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, the shape of the liquid storage groove is not limited to the linear shape of the above-mentioned embodiment, and it is shown in FIG.
The liquid storage groove 40 may be in the shape of a letter, or may be the liquid storage groove 50 in the shape of "S" as shown in FIG. 7. In short, as long as it has a portion inclined with respect to the traveling direction of the polishing belt 19, It's good. Further, in the above embodiment,
Since the polishing belt 19 having the through holes 19a is used, it is not necessary to supply the cleaning liquid between the work and the polishing belt 19 by circulating the cleaning liquid to the surface side of the polishing belt 19, but If a cleaning liquid is separately supplied between the polishing belt 19 and the polishing belt 19, a non-porous polishing belt may be used.

In addition, the present invention is not limited to a belt sander machine for processing a metal work, but can be applied to a machine for processing a work of other materials, etc., and various modifications can be made without departing from the scope of the invention. be able to.

[0023]

As described above, in the belt sander of the present invention, the surface of the platen in contact with the polishing belt is provided with the liquid storage groove which is connected to the supply port for the cleaning liquid, and is formed in the running direction of the polishing belt. It has a feature in that it is inclined with respect to it. As a result, the cleaning liquid is evenly supplied to almost the entire area of the polishing belt, and the cleaning liquid in the liquid storage groove flows and is constantly replaced with a fresh one, so that the chips are evenly distributed.
In addition, it has an excellent effect that it can be efficiently washed, and thus it is possible to reliably prevent the chips from sticking to each other.

[Brief description of drawings]

1] Bottom view of platen

FIG. 2 is a cross-sectional view of the platen taken along the line II-II in FIG.

FIG. 3 is a schematic perspective view showing a platen and a polishing belt.

FIG. 4 is a side view of the entire belt sander machine.

FIG. 5 is a vertical sectional view of a treading device.

FIG. 6 is a bottom view showing a modified example of the platen.

FIG. 7 is a bottom view showing another modification of the platen.

[Explanation of symbols]

 19 ... Polishing belt 22 ... Platen 32 ... Liquid supply path 34 ... Liquid supply port 35 ... Liquid storage groove

Claims (1)

[Scope of utility model registration request] 1. A polishing belt is movably stretched between a plurality of rollers, and a platen for pressing the polishing belt against a work is provided between the rollers, and a cleaning liquid is provided between the platen and the polishing belt. In the one in which the liquid supply port for supplying is formed, a liquid storage groove that is continuous with the liquid supply port is formed on the surface of the platen that contacts the polishing belt, and the liquid storage groove is formed in the running direction of the polishing belt. Belt sander machine characterized by being tilted.