JP2562993B2 - Multi-stage head type belt sander machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a plurality of grinding heads arranged along a running direction on a material feeding device in which a material feeding belt is wound around a driving roll and a driven roll. Then, the present invention relates to a multi-stage belt sander machine in which a thin plate-shaped processed material is made to travel between a grinding head and a material feeding device to sequentially grind and polish the thin plate-shaped processed material.

[Prior Art] The ultra-thin processed material is put on the market as a material that can be easily used for various purposes such as surface finishing of furniture and fittings.

In order to sequentially grind and polish this ultra-thin processed material with one machine, a multi-stage belt sander machine has been proposed in which a plurality of grinding heads are arranged on a material feeding device along the traveling direction. .

By the way, when a plurality of grinding heads are arranged in this way,
Correspondingly to this, the material feeding device formed by bridging the material feeding belt on the driving roll and the driven roll becomes long, and the material feeding belt becomes easy to sag in the central portion between the rolls. On the other hand, each of the grinding heads is provided with a duct for collecting grinding dust, and the mouth of the duct is directed toward the grinding section to prevent the dust from scattering due to its suction action. If there is slack in the material feeding belt, the belt floats due to the suction force of the duct. Even if you do not use the recovery duct,
Due to inertial running of the material feeding belt, running resistance caused by various causes, etc., the material feeding belt floats due to the slack, so that stable processing material supply cannot be performed.

In addition, since this kind of material feeding passage for running the thin plate-shaped working material is extremely narrow, the material feeding belt comes into contact with the endless sanding belt and is worn during the time when the working material is not being supplied, causing unevenness on the surface. There is a risk that it will not be possible to support the work material in a uniform manner, or in some cases, the feed belt may break.

An object of the present invention is to provide a multi-stage head type belt sander machine which does not have such problems.

[Means for Solving the Problem and Its Action] The present invention is the above-described multi-stage belt sander machine, in which a suction hole is provided on the peripheral surface immediately below the grinding portion of each grinding head, and the inside thereof is sucked. A guide roll that is in communication with the pump is arranged, and a pressure roll that presses the material feeding belt surface downward between the guide rolls is arranged below the material feeding passage, and the material feeding belt is provided between the guide rolls. It is characterized in that the vehicle is detoured to run downward.

In such a configuration, the material feeding belt is pressed downward by the pressing roll, and therefore, the horizontal traveling portion of the material feeding belt has three or more driving rolls and guide rolls or guide rolls and driven rolls, and further three or more grinding heads. In some cases, it occurs only between the guide rolls, and at least one end of each horizontal traveling part is supported by the guide rolls to hold the tension force, and thus the floating of the feeding belt becomes a problem. Becomes shorter. Moreover, due to the guide roll having a suction action, which is arranged immediately below the grinding portion of the grinding head,
In combination with the action of the pressing roll, the material feeding belt is closely held on the peripheral surface of the guide roll, the lifting of the material feeding belt is further prevented, and the slack is significantly improved.

On the other hand, the grinding of the processed material by the grinding portion may be performed only at the apex of the guide roll. Therefore, in order to prevent the material feeding belt from being ground by the endless sanding belt while the material is not being supplied. The narrower the surface contact area between the ground portion and the material feeding belt, the better. However, as described above, since the material feeding belt is in intimate contact with the guide rolls as much as possible, the surface contact area is narrowed, and the abrasion of the material feeding belt due to the ground portion is reduced.

Further, when the pressure roll is provided with a suction hole on the peripheral surface and the inside of which is communicated with a suction pump, grinding dust, dust, dust and the like adhering to the surface of the material feeding belt are collected by the pressure roll.

Further, as another means for collecting grinding dust and the like adhering to the surface of the material feeding belt, the inclined traveling portion of the material feeding belt between the guide roll and the pressure roll is provided with a suction hole at a position facing the surface of the material feeding belt, It is also possible to dispose a suction cylinder that communicates the inside with a suction pump to suck the polishing dust on the belt surface.

[Embodiment] An embodiment of the present invention will be described with reference to the accompanying drawings.

1 to 3, reference numeral 1 is a multi-stage head type belt sander machine according to the present invention, in which a driving roll 4 and a driven roll 5 are provided in front of and behind a material feeding frame 3 supported by a base 2 and capable of moving up and down.
And a material feeding belt 6 is hung on the rollers 4 and 5 to form a material feeding device 8. Further, two grinding heads 10a and 10b are sequentially mounted on the vertical frame 9 provided upright on the side of the belt sander 1 along the material feeding direction.

The grinding heads 10a, 10b, the traveling roll 11 also serves as a steering, the traveling rolls 12, 13 are arranged on the lower left and right, and when one of the traveling rolls 11, 12, 13 is used as a drive guide roll. In addition, a treading device 14 is disposed between the traveling rolls 12 and 13, and an endless sanding belt 15 is stretched over the treading device 14, and the treading device 14 is used as a grinding portion.
Thus, the endless sanding belt 15 is pressed against the upper surface of the processed material and ground and polished. A material feeding passage 16 is provided between the grinding heads 10a and 10b and the material feeding device 8.

Further, immediately before facing the running direction of the endless sanding belt 15 of the grinding heads 10a, 10b, ducts 17, 17 for collecting grinding dust communicating with a vacuum pump are respectively arranged, and the ducts 17, 17 are provided. By directing the suction ports 18, 18 to the grinding portion, the suction action absorbs the grinding dust generated by the grinding process and prevents the scattering.

With respect to the belt sander machine 1 having such a configuration, a main part of the present invention will be described.

In the belt sander machine 1 having the two-stage grinding heads 10a and 10b as described above, the distance between the driving roll 4 and the driven roll 5 becomes long, and the tension of the material feeding belt 6 at the center thereof is increased. Inevitable reduction of Therefore, the material feeding belt 6 is floated by the suction force of the collecting ducts 17, 17 and the material feeding passage 16 of this kind is extremely narrow. Therefore, the material feeding belt 6 is not fed while the processed material is not fed. The surface is ground by contacting the endless sanding belt 15,
In some cases, unevenness may occur on the surface, making it impossible to evenly support the processed material, or in some cases, the material feeding belt may break.

Therefore, in the present invention, as shown in FIGS. 1 and 4, the guide rolls 20 and 20 are rotatably supported directly below the treading device 14, and the material is fed between the guide rolls 20 and 20. A pressure roll 21 is disposed below the passage 16, and the material feeding belt 6 is made to pass under the pressure roll 21 from the guide rolls 20 and 20 so as to detour below the material feeding passage 16.

Further, as shown in FIGS. 5 and 6, the guide roll 20 has a fixed communication tube 32 whose both ends are fixedly supported by the material feeding frame 3.
In addition, the large diameter idle outer cylinder 30 having a large number of elongated suction holes 31 is concentrically supported at both ends via bearings 34, 34, and protrudes outward from the end of the communication cylinder 31. It is configured to be connected to a suction pump (not shown) via the communication pipe 35, and causes a suction action from the communication hole 33 of the fixed communication cylinder 32 to each suction hole 31 in association with the drive of the suction pump, The material feeding belt 6 is attracted to the peripheral surface of the idle outer cylinder 30.

The guide rolls 20, 20 and the pressing roll 21 each have their shaft ends fixed to the material feeding frame 3 and can rotate freely around the shafts. Further, the pressing roll 21 has both ends supported by bearings 23, and a height adjusting screw screwed on the side surface of the material feeding frame 3.
The upper end of 24 is screwed to the bearing 23, and its rotation is adjusted so that the upper edge of the pressing roll 21 is supported at a position below the material feeding passage 6 so that the traveling of the processed material is not hindered. ing. The pressing roll 21 can be urged downward by an ammunition machine or the like to keep the material feeding belt 6 in a tensioned state.

In such a structure, the material feeding belt 6 is pressed by the pressing roll 21.
Is pushed downwardly, so that the horizontal traveling portion above the material feeding belt 6 has the drive roll 4 and the guide roll 4 at the latter half thereof.
The guide roll 20 is formed between the guide roll 20 and the driven roll 5 in the front half of the guide roll 20, and the guide roll supports one end of each horizontal traveling portion to maintain the tension. That is, the upper traveling portion is divided and the horizontal traveling portion is substantially shortened. Further, the guide rolls 20, 20 are arranged at the grinding parts of the grinding heads 10a, 10b, which means that the grinding parts are at the edge positions of the horizontal traveling part. For this reason,
The slack of the material feeding belt 6 occurs in proportion to the length of the horizontal traveling portion between the rolls and becomes noticeable at the center of the horizontal traveling portion. However, as the horizontal traveling portion becomes shorter, the guide roll 20 causes the treading device 14 (grinding device 14). Since it is located just below (part), it deviates greatly from the central part. Therefore, in this structure, in cooperation with the suction action of the guide roll 20, the material feeding belt 6
The slack is greatly improved, and the lifting of the material feeding belt 6 by the collecting ducts 17, 17 can be prevented as much as possible.

Further, a suction action is generated in the guide roll 20 so that the material feeding belt 6 runs in close contact with the peripheral surface of the guide roll 20.
Therefore, the surface contact area between the grinding portion and the material feeding belt becomes as narrow as possible, and the wear caused by the grinding of the material feeding belt by the grinding portion while the material feeding belt 6 is not supplied is possible. Will be reduced to.

On the other hand, in place of the mere roll-shaped pressing roll 21, a pressing roll having a function of removing the grinding dust in order to remove grinding dust, dust, dust, etc. generated in the grinding process from the material feeding belt. 21s can also be applied.

That is, as shown in FIGS. 7 and 8, the inside of the suction pump is communicated with the suction pump, and a large number of long hole-shaped suction holes 37 along the axial direction are provided on the peripheral surface of the suction pump. Tube 38
It is also possible to provide a pressing roll 21s having the same structure as the guide roll 20 of FIG. As a result, the polishing dust and the like adhering to the surface of the material feeding belt 6 is absorbed through the suction holes 37.

As another means for collecting the polishing dust on the surface of the material feeding belt 6, as shown in FIGS. 7 and 8, a cylindrical suction is applied to the inclined traveling portion of the material feeding belt 6 between the guide roll 20 and the pressing roll 21. Cylinder
It is also possible to arrange 40, 40. Both ends of the suction cylinders 40, 40 are supported by the material feeding frame 3, and suction holes 41 formed in the lower portion
Facing the surface of the material feeding belt 6, and the inner space thereof is connected to the connecting end 42.
It is made to communicate with the suction pump via. In such a configuration, the polishing dust and the like adhering to the belt surface can be collected from the suction hole 41 and contribute to the cleaning of the belt surface. In this case, the cleaning effect is further enhanced by using the pressure roll 21s having a suction function as shown in FIG. The suction cylinders 40, 40 may be applied together with the pressing roll 21 having no suction action. Further, the suction cylinders 40, 40 are not limited to a cylindrical shape, but may have various shapes such as a rectangular cross section.

Thus, with such a configuration, the material feeding belt 6 at the grinding site
The slack is prevented and the collecting ducts 17, 17 are prevented from floating, and the endless sanding belt 15 of the material feeding belt 6 is prevented.
It is possible to prevent the material feeding belt 6 from being ground by the above, and by applying the pressing roll 21s and the suction cylinder 40, each grinding head
Polishing dust generated in 10a and 10b is removed, and the endless sanding belt 15 is satisfactorily ground and polished at the downstream position.

[Advantages of the Invention] The present invention, as described above, arranges the guide rolls 20 and 20 that generate a suction action immediately below the grinding portions of the grinding heads 10a and 10b, and further, between the two rolls, the surface of the material feeding belt Since the pressing roll 21 for pressing is arranged below the material feeding passage 16 and the material feeding belt 6 is detoured between the guide rolls 21, 21 to run downward, floating of the material feeding belt becomes a problem. The horizontal traveling portion is shortened, and further, the suction of the guide roll 20 causes the material feeding belt to be in close contact, so that the material feeding belt 6 can be further prevented from floating.

Further, the feed belt is brought into close contact with the guide rolls as much as possible, so that the surface contact area between the grinding portion and the feed belt is narrowed, and the feed belt is worn due to the grinding portion while the processing material is not supplied. Can be reduced.

On the other hand, the inside communicates with the suction pump, and the suction holes are
When the pressing roll 21s having 37 is applied or when the suction cylinders 40, 40 are arranged on the inclined surface of the material feeding belt 6 between the guide roll 20 and the pressing roll 21, the grinding process is not performed. Along with this, it is possible to remove dust, grinding dust, dust, and the like adhering to the material feeding belt, and to produce an excellent effect such that a beautifully polished skin can be produced.

[Brief description of drawings]

The attached drawings show an embodiment of the present invention. FIG. 1 is a side view of a multi-stage head type belt sander 1, FIG. 2 is a front view thereof, FIG. 3 is a plan view thereof, and FIG. A side view, FIG. 5 is a plan view showing the lower half of the guide roll 20 in a vertical section, FIG. 6 is a vertical side view of the guide roll, and FIG. 7 is a partial cutaway of the main part equipped with suction cylinders 40, 40. A side view and FIG. 8 are cutaway plan views of the same portion. 1 ... Belt sander 6 ... Feed belt 8 ... Feed device 10a, 10b ... Grinding head 15 ... Endless sanding belt 16 ... Feed passage 17 ... Duct for recovery 20 ... Guide roll 21, 21s …… Pressing roll 31 …… Suction hole 37 …… Suction hole 40 …… Suction tube

Claims (3)

(57) [Claims] 1. A plurality of grinding heads, in which endless sanding belts are run around a plurality of running rolls, are arranged on a material feeding device in which a material feeding belt is wound around a driving roll and a driven roll, and grinding is performed. In a multi-head belt sander machine in which a material feeding passage through which a thin plate-shaped material travels is arranged between the head and the material feeding device, a suction hole is provided on the peripheral surface immediately below the grinding part of each grinding head, A guide roll that is in communication with the suction pump is arranged, and a pressing roll that presses the material feeding belt surface downward between the guide rolls is arranged below the material feeding passage, and the material feeding is performed between the guide rolls. A multi-stage belt sander machine characterized by allowing the belt to circulate around downwards. 2. The pressing roll is provided with a suction hole on its peripheral surface,
The multi-stage head type belt sander machine according to claim 1, characterized in that the interior of the belt sander machine communicates with a suction pump. 3. A belt between the guide roll and the pressure roll is provided with a suction hole at a position facing the surface of the material feeding belt in an inclined running portion of the material feeding belt, and the inside of the material is communicated with a suction pump to form a belt. The multistage head type belt sander according to claim 1 or 2, wherein a suction cylinder for absorbing polishing dust on the surface is arranged.