JPS62107973A - Polishing device for belt sander - Google Patents

Abstract

PURPOSE:To prevent production of wrinkle at a ridge part due to the pressure contact force of a polishing belt, by a method wherein retainer rolls are totally driven, and a drive rotation force is exerted on a ridge roll brought into pressure contact with a polishing belt. CONSTITUTION:Through driving of a drive motor M and running of a chain 34, retainer rolls 7 and 8 are rotated, and the rotation force thereof is transmitted to a retainer roll 9 by means of a chain 28. Through driving of all the retainer rolls 7-9, a polishing belt 10, run about the retainer rolls 7-9, is run, and the drive force of the drive motor M is also transmitted to a ridge roll 16 by means of a chain 37. The ridge roll 16, brought into pressure contact with the polishing belt 10, is driven and rotated, and the polishing belt 10 is run in a condition to hold a stretch state at a ridge part. Production of wrinkle at the ridge part due to the pressure contact is prevented, and driving of all the retainer rolls 7-9 prevents strip of the polishing belt 10 as much as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a polishing device for a belt sander used for grinding and polishing wood.

<Prior art> In the belt sander, a cleaning liquid is sprayed from a cleaning liquid injection nozzle onto the abrasive grain surface of the abrasive belt that is stretched around a plurality of support rolls to clean the abrasive grain surface and prevent clogging. This is widely known to the general public.

In addition, in order to prevent the cleaning liquid supplied to the belt surface from acting on the workpiece, a drain roll is pressed into contact with the support roll on which the abrasive belt is wrapped, via the belt,
This device uses pressure to remove excess cleaning fluid from the belt surface.

Special Publication No. 49-3438 and Special Publication No. 51-43237
It is known as disclosed in No.

By the way, the roll located at the furthest position from the fixed material path, such as the support roll 9 in Fig. 1, normally becomes a steering roll and makes one swing movement, so it cannot be constantly pressed against the draining roll. Therefore, in the above configuration, the draining roll is brought into pressure contact with the support roll on the side of the fixed material passage. However, in this case, the drain roll increases the width of the polishing device on the straight material path side, and as a result, it is necessary to increase the interval between the suppression rolls disposed before and after the polishing device. On the other hand, in order to properly feed the workpiece, it is necessary to apply the pressing force of the rolls to the workpiece at all times during the feed, and therefore, the shortest measure of the workpiece is the spacing between the pressure rolls. Determined by. However, due to the above-mentioned reason, the interval becomes large, and as a result, with the above-mentioned structure, the application of short-length workpieces is severely restricted.

In addition, some of the support rolls on the fixed material passage side have a mechanism that can be applied to roll grinding by repositioning them to the fixed material passage side rather than the treading pad. Contact can no longer be maintained, thus making it impossible to apply the mechanism. Thus, the above configuration has various drawbacks.

Therefore, as shown in Figure 4, apart from the support roll,
A receiving roll b is arranged inside the polishing belt a, a draining roll C is pressed against the receiving roll b side via a bell a, and the pressure contact force causes the draining roll C to rotate following the belt a,
It has been proposed to eliminate the drawbacks of the conventional configuration by removing excess liquid.

<Problems to be Solved by the Invention> By the way, when the draining roll C is pressed against the bell) a at the straight running portion of the bell) a, the pressing force is equal to Bell) a.
This is because it becomes a resistance to the running of the vehicle.

As shown in FIG. 4, wrinkles X are formed on the belt a at the draining portion. When the wrinkles X occur, the cleaning liquid tends to scatter around the outside of the designated area. In addition, in the conventional configuration, one of the support rolls is used as a drive roll, and the other support rolls are used as the belt runs.

Since the belt rotates freely, the pressure resistance causes the belt to easily slip with respect to the support roll, making it impossible to grind or polish the workpiece to a predetermined thickness.

An object of the present invention is to provide a polishing apparatus having a configuration capable of eliminating the above-mentioned drawbacks.

Means for Solving the Problems> The present invention provides a washing liquid spray nozzle that is disposed opposite to the abrasive grain surface of a polishing belt that is stretched around a plurality of support rolls.

A receiving roll disposed along the running direction of the belt from the injection nozzle to the polishing site near the running material path side and located inside the polishing belt, and press-contacted to the receiving roll side via the polishing belt. In a polishing device equipped with a draining device consisting of a draining roll, the support roll is all-wheel drive, and the rotational driving force to the support roll is also transmitted to the draining roll via an intermediary joint. It is characterized by the fact that

Here, examples of ``makikake'' include chains, belts, and ropes.

Effect> Since the draining roll is also given a driving force, a feeding force is applied to the polishing belt at the draining portion of the polishing belt. For this reason, the belt runs without succumbing to the pressure contact resistance of the draining roll, and wrinkles X do not occur at the entrance of the pressure contact part.Also, since the driving force acts on all the support rolls around which the belt is wound, the support Slippage of the belt on the rolls is also eliminated as much as possible.

<Example> FIG. 1 shows an outline of the belt sangu machine.

Here, reference numeral 1 denotes a straightening device, which has an endless straightening belt 4 wrapped around a driving roll 2 and a driven roll 3, with a horizontal running section above the belt serving as a material feeding section.

A material feeding path 5 is placed on the material straightening device.

Cutting equipment W! 16 are provided.

The cutting device 6 has a triangular arrangement of support rolls 7.8 disposed along the material feeding path 5 and a support roll 9 which also functions as a steering wheel above the support rolls 7.8, and a polishing belt 10 is attached to the support rolls 7-9 It becomes by passing. The support roll 9 is a press cylinder 11
(See FIG. 2) It also functions as a tension roll that tensions the polishing belt IO.

Inside the polishing belt lo between the support rolls 7.8,
A tread pressure device 12 is provided, and its lower surface serves as a polishing portion. The pressure bag 2i12 is timing-controlled to press the polishing belt 10 toward the material feeding path 5 side when the front end of the workpiece reaches the polishing site, and release the pressure when the workpiece passes, It has a function of appropriately polishing the upper surface of the workpiece.

A cleaning liquid spray nozzle 14 is disposed between the support rolls 8 and 9 with its eye end facing the abrasive grain surface of the polishing belt 10, and a receiver located inside the polishing belt 10 is located directly below the cleaning liquid spray nozzle 14. A draining device consisting of a roll 15 and a draining roll 16 located on the outside is provided. The drain roll 16
is covered with an elastic body such as rubber, and can be arbitrarily converted into a pressure contact position and a non-pressure contact position with respect to the polishing belt 10 by a suppression cylinder 17 (see FIG. 2).

In this non-pressing position, the draining roll 16 is out of contact with the polishing belt 10, and in this state, the receiving roll 15 is out of contact with the polishing belt 10. Therefore, the polishing belt IO does not come into contact with either the receiving roll 15 or the draining roll 16, and can run without resistance.

Further, in the pressure contact position, the draining roll 16 presses the polishing belt 10 toward the receiving roll 15, and in this state, the polishing belt IO is pinched between the receiving roll 15 and the draining roll 16. In this state, the cleaning liquid is sprayed from the cleaning liquid injection nozzle 14 onto the surface of the polishing bell (10), and the liquid is applied to the V
It is stored in the shaped cavity 18. An end of a liquid collecting duct 19 is disposed above the V-shaped gap 18, and the cleaning liquid stored in the gap 18 is recovered by its suction action. Further, a saucer 21 is provided at the lower part of the drain roll 16, and the cleaning liquid dripped from the surface of the drain roll 16 is collected.

Other cutting equipment i! Press rolls 24, 24 are provided at the front and rear of the roller 6, which are urged toward the material feeding path 5 by a single bullet machine.

Next, the main part of the present invention will be explained with reference to FIG.

A sprocket 2 is attached to the shaft end of the support roll 7.8.9.
5, 26, and 27 are fixed respectively, and the tin rockets 25 to 2
An endless chain 28 is wrapped around 7. At a position between the sprockets 25, 26, a tension sprocket 30 is engaged on the inside of the chain 28, which is biased outwardly by a cylinder 29 in order to maintain its tension. A sprocket 31.32 is also fixed to the shaft of the support roll 7.8, and an endless chain 34 is connected to the sprocket 33 provided on the drive shaft of the drive motor M and the sprocket 31.32. It is being handed over.

A sprocket 35 is also fixed to the rotating shaft of the draining roll 16, and linked to the sprocket 36 fixed to the shaft of the support roll 8 by an endless chain 37. The chain 37 is tensioned by a tension sprocket 38.

The number of teeth of the sprocket 35 is selected so that the circumferential speed of the draining roll 16 substantially matches the running speed of the polishing belt 10.

When the drive motor M is driven by such a drive mechanism, the support roll 7.8 rotates as the chain 34 runs, and this rotational force is transmitted to the support roll 9 by the chain 28. For this reason, each support roll 7.8.9 has an all-wheel drive, and the abrasive belt lO
This will cause the vehicle to run. The chain 37 also applies the driving force of the drive motor M to the draining roll 16, causing it to rotate.

Therefore, when the excess cleaning liquid is removed by the draining roll 16, the driving force is applied to the draining roll 16, so that the abrasive belt 10 is fed along with the pressure contact. For this reason, the abrasive belt 10 runs while being maintained in a tensioned state at the drain section. Moreover, the all-wheel drive of the support roll 7°8.9 also eliminates slippage of the polishing belt 10 as much as possible.

In addition, as in this embodiment, the press cylinder 17 allows
The draining roll 16 can be changed at will between a pressure contact position and a non-pressure contact position with respect to the polishing belt IO, and when pressing the drain roll 16 against the running polishing belt 10, When the driving force is applied and the chair is in a non-rotating state, a large load is applied to the abrasive belt 10 during press contact. However, with the above configuration, the draining roll 16 is given a rotation that makes its circumferential speed equal to the speed of the polishing belt 10 in advance, so that the load at the time of pressure contact is small.

In addition, the support roll 8 is made movable by an eccentric shaft or the like, as shown by the chain line in FIG. With such a position transformation,
The upper surface of the workpiece is roll-ground by the support roll 8, allowing single-layer grinding. In this case, the support roll 8
In order to allow the movement of the chain 34 and maintain the tension of the chain 34, the chain 34 is made long enough and a tension device is provided on its inner surface.

FIG. 3 shows another embodiment of the drive mechanism for the draining roll 16.

Here, a friction wheel 40 is in pressure contact with the draining roll 16. A tin rocket 41 is fixed to the rotating shaft of the friction wheel 40, and a sprocket 42 is fixed to the rotating shaft of the support roll 9.
and are linked by an endless chain 43. The chain 43
is tensioned by a tension sprocket 44.

With this configuration, the driving force of the support roll 9 is transmitted to the friction wheel 40 through the chain 43, and the driving force is transmitted to the draining roll 16 via the friction wheel 40, causing it to rotate. .

In each of the above embodiments, the top surface grinding type was explained.
The present invention can also be applied to a bottom surface grinding type.

<Effects of the Invention> As described above, the present invention provides an all-wheel drive for the support rolls,
In addition, since a driving rotational force is applied to the draining roll that has a good pressure of 4 on the abrasive belt, the generation of wrinkles X at the draining portion caused by the pressure contact force of the abrasive belt, slipping of the abrasive belt, etc. are prevented, and the abrasive belt is It has excellent effects such as being able to run evenly and making the action of the draining roll more effective.

[Brief explanation of drawings]

The accompanying drawings show embodiments of the present invention, and FIG. 1 is a schematic side view;
FIG. 2 is a schematic side view showing the drive mechanism, 3rd vgJ is a schematic side view showing another embodiment of the drive mechanism, and FIG. 4 is a side view of main parts showing the conventional drawbacks.

Claims (1)

[Scope of Claims] A cleaning liquid spray nozzle installed opposite to the abrasive grain surface of an abrasive belt stretched over a plurality of support rolls; A polishing device comprising a receiving roll disposed between and located inside the polishing belt, and a draining device consisting of a draining roll that presses against the receiving roll through the polishing belt, wherein the supporting roll is completely removed. A polishing device for a belt sander, characterized in that it is wheel driven and the rotational driving force to the support roll is also transmitted to a draining roll via a winding medium.