JP2653622B2 - Dust remover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved dust removing apparatus for removing dust adhering to the surface of a work such as a printed circuit board.

[0002]

2. Description of the Related Art For example, when removing dust adhering to the surface of a printed circuit board immediately before performing a printing process on the printed circuit board, or removing dust adhering to the surface of the resin material immediately before applying a polishing process to the resin material. As a dust removing device for removing dust adhering to the surface of a work, as in the case of removing, the following is known.

[0003] This dust removing device has a structure in which a rotating brush is provided in a passage area of a work carried by a carrying conveyor, and a dust suction duct connected to a suction side of a dust collecting fan device is provided. Then, dust can be removed from the work by rubbing the surface of the work with a rotating brush, and the removed dust is sucked into the dust suction duct together with air to remove dust.

[0004]

However, even if an attempt is made to eliminate dust by the above-mentioned conventional means, in practice,
Not only cannot the dust adhering to the surface of the work be sufficiently removed, but also some of the dust removed from the work by the rotating brush may adhere to the work again without being sucked into the dust suction duct. The fact was that the dust could not be completely removed from the surface.

An object of the present invention is to provide a dust removing apparatus which can surely remove dust adhering to the surface of a work and can efficiently perform a subsequent process.

[0006]

According to a first aspect of the present invention, there is provided a dust removing apparatus which is provided in a passage area of a work having an adhesive outer peripheral surface, and is rotated while the adhesive outer peripheral surface is in contact with the work. A dust removing roll, and an adhesive belt that is provided so as to be able to travel between a plurality of rolls having an adhesive surface, and is run by bringing the adhesive surface into contact with the adhesive outer peripheral surface of the dust removing roll at a predetermined time, An adhesive belt is provided on the inner peripheral side of the adhesive belt along the dust removing roll so as to be displaceable in a direction approaching or moving away from the dust removing roll. A contact roll which is displaced in a direction away from the dust removing roll side while being in contact with the dust removing roll to make the adhesive surface of the adhesive belt non-contact with the adhesive outer surface of the dust removing roll,
A cleaning device for cleaning the adhesive surface of the adhesive belt when the adhesive belt and the dust removing roll are in a non-contact state,
A contact roll drive that displaces the contact roll to the dust removing roll side so that the adhesive belt is in contact with the dust removing roll for one circumference, and displaces the contact roll away from the dust removing roll side so that the adhesive belt is cleaned by the cleaning device. It is characterized by having a configuration with a mechanism.

Further, in the dust removing apparatus according to the second aspect of the present invention, when the adhesive belt is brought into a non-contact state with the dust removing roll and is cleaned by the cleaning apparatus in the first aspect of the present invention, It is characterized in that the belt is configured to run at a lower speed than when the belt runs in contact with the dust removing roll.

[0008]

In the dust removing device according to the first aspect of the present invention, the adhesive outer peripheral surface of the rotating dust removing roll comes into contact with the surface of the work to be conveyed, and the dust adhering to the surface of the work is removed by the adhesive. It is transferred to the dust removing roll by the adhesive force of the outer peripheral surface and is removed from the work. The contact roll drive mechanism displaces the contact roll to the dust removal roll side so that the adhesive belt contacts the dust removal roll by one circumference, and during that time, the dust transferred from the work surface to the dust removal roll is transferred to the adhesive belt. Removed and removed from the dust roll. Thereby, the adhesive strength of the dust removing roll, that is, the dust removing ability is maintained, and dirt adheres to the entire circumference of the adhesive belt to reduce the adhesiveness.

Thereafter, the contact roll is displaced in a direction away from the dust removing roll by the contact roll driving mechanism, and when the adhesive belt is brought into a non-contact state with the dust removing roll, the adhesive surface of the adhesive belt is cleaned by the cleaning device to remove dust. The dust transferred from the roll to the adhesive belt is removed. Thereby, the adhesive strength of the adhesive belt, that is, the dust removing ability is also restored.

In the dust removing apparatus according to the second aspect of the present invention, when the adhesive belt is washed away from the dust removing roll, it runs at a lower speed than when the adhesive belt contacts the dust removing roll. You. Therefore, even when the dust removing roll rotates at a high speed to efficiently remove dust, the running speed of the adhesive belt is maintained at a low speed suitable for washing during washing, so that washing is efficiently and reliably performed.

[0011]

As described above, according to the dust removing apparatus of the first aspect, the dust on the surface of the work is not transferred to the dust removing roll directly by the adhesive force, instead of being rubbed and sucked together with the air. Thus, there is an excellent effect that dust on the work surface can be completely eliminated.

The dust transferred to the dust removing roll is removed by an adhesive belt, and the adhesive belt is washed to maintain the dust removing ability of the dust removing roll and the adhesive belt.
Since it is made to recover, the troublesome work of replacing the dust removing roll and the adhesive belt with reduced dust removing ability becomes unnecessary. Moreover, since the adhesive belt is configured to be washed after being brought into contact with the dust removing roll for one circumference,
The dust removing ability of the adhesive belt can always be maintained at a high level, and the dust removing ability of the dust removing roll can also be maintained at a high state.

Further, according to the dust removing device of the second aspect, an excellent effect that both the cleaning of the adhesive belt and the dust removal of the work can be efficiently and reliably performed can be obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the overall configuration includes a conveyor 1 for conveying a work W, a dust removal roll 10, an adhesive belt 30, and a cleaning device 45.

First, the conveyor 1 will be described. Inside the housing 2, a plurality of feed rolls 3 are supported in parallel, and a chain 5 is wound around a sprocket 4 provided at one end of each feed roll 3 (see FIG. 2). All the feed rolls 3 rotate at the same speed, and the work W placed on these feed rolls 3 is transported in the direction of the arrow in FIG. In the case of this embodiment,
The transport speed is 5 to 15 m / min.

A receiving roll 6 is provided in the middle of the transport path of the work W in the transporting conveyor 1, and the receiving roll 6 is rotated at the same peripheral speed as the feed roll 3 by a motor (not shown) so that the feed roll 6 is rotated. 3 together with a work surface 7 of the work W. A drive gear 8 is attached to one end of the receiving roll 6. The drive gear 8 is for rotating and driving a dust removing roll 10 described later.

The dust removing roll 10 is provided directly above the receiving roll 6 of the conveyor 1. As shown in FIG. 4, the bosses 12 are provided at both ends of the cylindrical support 11, respectively.
A pivot 14 is attached to the boss 12 via a bearing 13, and a urethane rubber plate 15 is wound around the outer peripheral surface of the cylindrical support 11. The diameter is 150 mm. The urethane rubber plate 15 has a chemical structure expressed as polyurethane and has a specific gravity of 1.00 to 1.30. The surface of the urethane rubber plate 15 has tackiness, and the hardness of the urethane rubber plate 15 is 10 to 10 from the viewpoint of removing dust from sticking.
It is preferably 30 °, and in this embodiment, the hardness is 30 °.
I'm using Due to the adhesive performance of the urethane rubber plate 15, the outer peripheral surface of the dust removing roll 10 has an adhesive outer peripheral surface 16.
It has become.

The support structure of the dust removal roll 10 will be described. Support blocks 17 are fixed to both ends of the pivot 14 of the dust removal roll 10, and as shown in FIG. Guide grooves 20 of two elevating guides 19 with surface ridges 18 fixed to housing 2
It is guided up and down freely in a state where it is fitted to the. The height of the support block 17 is determined according to the thickness of the workpiece W.
The work W to be conveyed is fixed by a stopper (not shown) at a height at which the dust removal roll 10 sandwiches the work W with the receiving roll 6. As shown in FIG. 3, a driven gear 21 having a pitch diameter corresponding to the height of the dust removing roll 10 is attached to one end of the dust removing roll 10, and the driven gear 21 meshes with the driving gear 8 of the receiving roll 6, and In the state
The dust removing roll 10 is rotationally driven at the same peripheral speed as the transport speed of the transport conveyor 1.

Next, the adhesive belt 30 has a structure in which a belt-like adhesive material made of a special adhesive elastomer is adhered to the outer peripheral surface of a belt-like base material for elongation prevention. Surface 31. The adhesive force of the adhesive surface 31 is stronger than the adhesive outer peripheral surface 16 of the dust removing roll 10, and the adhesive outer peripheral surface 16 and the adhesive surface 3
1 adheres to the adhesive surface 31 so that the deposits on the adhesive outer peripheral surface 16 are transferred to the adhesive surface 31. In addition, the deposits on the adhesive surface 31 can be easily removed by rubbing with water, so that the adhesive ability of the adhesive surface 31 is restored.

On the other hand, a contact roll 32 is provided just above the dust removing roll 10 on the inner peripheral side of the adhesive belt 30, and the inner peripheral surface (base material) side of the adhesive belt 30 is a contact roll 32. Around the cleaning roll 46 and the drive roll 58 to be rotated. The contact roll 32 is supported by fixing both ends of a pivot 33 to a rod 35 protruding downward from the air cylinder 34. By operating the air cylinder 34, the contact roll 32 is removed from the dust removal roll 10.
Can be displaced in a direction approaching or moving away from. When the contact roll 32 is displaced in a direction (downward) approaching the dust removing roll 10, the adhesive surface 31 of the adhesive belt 30 comes into contact with the adhesive outer peripheral surface 16 of the dust removing roll 10,
Conversely, when the contact roll 32 is displaced away from the dust removing roll 10 (upward), the adhesive belt 30 is brought into a non-contact state with the dust removing roll 10. Also, as schematically shown in FIG.
Is connected to a rotary encoder 60, so that the number of rotations of the contact roll 32 and the traveling distance of the adhesive belt 30 can be detected. Based on the signal from the rotary encoder 60, the adhesive belt 30
When the control device 61 detects that the vehicle has traveled in contact with the dust removing roll 10 for one circumference, the control device 6
1 is to operate the air cylinder 34 to pull up the contact roll 32 in a direction away from the dust removing roll 10 to bring the adhesive belt 30 into a non-contact state with the dust removing roll 10. That is, the above-described related configuration of the air cylinder 34, the rotary encoder 60, and the control device 61 constitutes a contact roll driving mechanism 62 that causes the adhesive belt 39 to contact or separate from the dust removing roll 10 by one circumference.

On the other hand, beside the contact roll 32,
A tension roll 37 supporting the pivot 38 by an upward rod 40 of an air cylinder 39 is provided.
It is set to be higher than 2. The tension roll 37 is moved up and down in synchronism with the elevation of the contact roll 32 by the operation of the air cylinder 39.
The adhesive belt 30 keeps the tension state without loosening. The adhesive belt 30 travels in a state where the adhesive surface 31 is hung while being in contact with the tension roll 37. A silicone rubber plate is wound around the tension roll 37, for example. Even if the adhesive surface 31 comes into contact with the surface, it does not stick.

Next, the cleaning device 45 will be described. This cleaning device 45 is provided on the side of the tension roll 37. The cleaning device 45 includes a cleaning roll 46 supported at a lower height than the tension roll 37. The adhesive belt 30 is turned around while the base material is hung while being in contact with the cleaning roll 46, and then travels upward. A cleaning tank 48 supported by an elevating device 47 is provided below the cleaning roll 46. In the cleaning tank 48, water is injected at a flow rate of, for example, 5 liter / minute from a water inlet (not shown). The washing water 50 is stored in a predetermined amount, and a rotating brush 49 made of, for example, nylon, which is driven by a motor (not shown), is supported in a state of being immersed in the washing water 50.

The height of the washing tank 48 is adjusted by the operation of the elevating device 47 so that the washing rotary brush 49 is moved by the washing roll 46.
The cleaning brush 49 moves up and down between a height at which the adhesive belt 30 is in contact with the adhesive surface 31 so as to sandwich the adhesive belt 30, and a height at which the cleaning rotary brush 49 is separated from the adhesive belt 30. It is preferable that a filter be provided in a drain path of the cleaning water 50 flowing out of the cleaning tank 48 so that the cleaning water 50 is filtered to prevent foreign substances in the cleaning water 50 from flowing down.

Above the cleaning roll 46, a drainer 5
1 is provided. The draining device 51 is provided with the draining lower holding roll 51a and the draining lower receiving roll 52a arranged side by side at the same height, and the draining upper pressing roll 51b and the draining upper receiving roll 52b are placed at the same height. This is a configuration provided side by side.

Each of these rolls 51a, 51b, 52
a and 52b are those in which a cylindrical sponge is attached to the outer periphery of the core tube, and the sponge is made of polyvinyl alcohol which is a hydrophilic polymer, and has excellent water absorption and water retention ability due to ultrafine continuous pores. It is made of a material having flexibility and abrasion resistance. In addition, the sponge has coarser lower draining rolls 51a and 52a and finer upper draining rolls 51b and 52b.

The upper and lower draining presser rolls 51
a and 51b are supported by a rod 54 projecting in the horizontal direction of an air cylinder 53 via a bracket 55, and upper and lower draining receiving rolls 52a and 52b are fixed and supported by the housing 2, Air cylinder 5
By the operation of 3, the draining press rolls 51a and 51b sandwich the adhesive belt 30 running upward between the draining receiving rolls 52a and 52b.

A drive roll 58 is provided above the draining device 51.
An adhesive belt 30 is wrapped around the drive roll 58 with the base material in contact with the drive roll 58, and is turned in a direction toward the contact roll 32. Then, the adhesive belt 30 circulates and runs on the above-described path by the rotational force of the drive roll 58 that is rotationally driven by a motor (not shown). By changing the driving speed of the motor, the traveling speed of the adhesive belt 30 is the same as the peripheral speed of the adhesive outer peripheral surface 16 of the dust removing roll 10, and is lower than the peripheral speed of the dust removing roll 10, for example, 0.5 m / min. Can be changed to one of the speeds.

Next, the operation of this embodiment will be described. First, the receiving roll 6 of the conveyor 1 is rotated to rotate the dust removing roll 10 in conjunction therewith, and the adhesive belt 30 is circulated at the same speed as the peripheral speed of the dust removing roll 10 to lower the cleaning tank 48 of the cleaning device 45. To prevent the cleaning rotary brush 49 from coming into contact with the adhesive belt 30, and further lower the contact roll 32 while lowering the tension roll 37 to remove the adhesive belt 30 from the dust removing roll 10.
Contact.

In this state, when the work W to which dust adheres to the upper surface is conveyed by the conveyor 1, when the work W passes between the receiving roll 6 and the dust removing roll 10, the dust removing roll 10 The upper surface of the work W is rolled while the 16 is in close contact, and the dust on the upper surface of the work W adheres to the adhesive outer peripheral surface 16 and is removed by being transferred to the dust removing roll 10. At this time, the dust removing roll 10 is attached to the adhesive belt 3.
As a result, the dust on the adhesive outer peripheral surface 16 of the dust removing roll 10 is transferred to the adhesive belt 30 by the strong adhesive force of the adhesive surface 31. Thereby, the dust removing roll 1
The dust removal capability of 0 is always kept high.

When it is detected by the rotary encoder 60 that the adhesive belt 30 has traveled for one circumference, the air cylinder 34 is operated based on a signal from the control device 61, and the contact roll 32 is moved to the dust removal roll 10 Is lifted in the direction away from the adhesive belt 3
0 is in a non-contact state with respect to the dust removing roll 10. At the same time, the traveling speed of the adhesive belt 30 is lower than when the adhesive belt 30 is in contact with the dust removing roll 10. When the adhesive belt 30 is separated from the dust removing roll 10, the cleaning tank 48 of the cleaning device 45 rises and the cleaning rotary brush 49
Comes into contact with the adhesive surface 31 of the adhesive belt 30. While the adhesive belt 30 passes through the cleaning device 45 at a low speed, dust of the adhesive belt 30 transferred from the dust removing roll 10 is removed by a cleaning rotary brush 49 rubbing the adhesive surface 31. At this time, since the traveling speed of the adhesive belt 30 is slow, dust is efficiently and reliably removed.

After the dust has been removed, the adhesive belt 30 passes through a drainer 51. In the draining device 51, the water adhering in the washing device 45 is passed through the lower draining rolls 51a and 52a and the upper draining rolls 51b and 52b while being sandwiched between the draining rolls 51a and 52b. It is absorbed and removed by 51b, 52a, 52b.

By performing the washing and draining in this manner, the adhesive strength of the adhesive belt 30, that is, the dust removing ability is restored. Thereafter, based on a signal from the control device 61, the cleaning tank 48 is lowered and the contact roll 32 is lowered.
Then, the tension roll 37 is lowered, and the adhesive belt 30 is returned to a state in which it comes into contact with the dust removal roll 10.

While the adhesive belt 30 is being cleaned, the dust removal of the work W by the dust removing roll 10 may be continued or interrupted. When the dust removal is continued, the dust removal ability of the dust removal roll 10 gradually decreases because the amount of dust adhered to the adhesive outer peripheral surface 16 of the dust removal roll 10 continues to increase. However, the cleaning of the adhesive belt 30 is completed before the dust-removing ability is greatly reduced, and the cleaned adhesive belt 30 is brought into contact with the dust-removing roll 10, so that the dust on the work W can be surely removed continuously. Can be done.

As described above, according to the present embodiment, the work W
The dust on the surface of the work W is removed by being directly transferred to the dust removing roll 10 by the adhesive force, so that the dust on the surface of the work W can be completely eliminated. Also, the dust removing roll 10
The dust removed by the adhesive belt 30 is removed by the adhesive belt 30, and the adhesive belt 30 is washed to maintain and recover the dust removing ability of the dust removing roll 10 and the adhesive belt 30. Dust removal roll 1
There is no need for a troublesome and time-consuming operation of replacing the adhesive belt 30 with 0, and there is no need to interrupt dust removal for this replacement operation. Moreover, the adhesive belt 30
Is configured to contact the dust removing roll 10 for one circumferential length and then wash, so that the dust removing ability of the adhesive belt 30 can be constantly maintained at a high level.
The dust removing ability can be maintained at a high level.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, the following modifications are possible.

(1) The material constituting the adhesive outer peripheral surface of the dust removing roll is not limited to urethane rubber, but may be other adhesive materials. When urethane rubber is used, it can be appropriately selected according to the material and size of dust adhering to the work.

(2) In the above embodiment, the dust removing roll is constituted by attaching a urethane rubber plate to the surface of the cylindrical support. However, the present invention is not limited to this. For example, the urethane rubber is directly attached to the outer periphery of the diameter formed on the shaft. May be provided.

(3) In the above embodiment, the rotary encoder 60 is connected to the contact roll 32 in order to detect that the adhesive belt 30 travels for one circumference.
However, the present invention is not limited thereto, and a rotary encoder may be connected to other rolls such as the driving roll 58 and the cleaning roll 46, or a roll for detecting the traveling distance may be brought into contact with the adhesive belt 30, The traveling time for one circumference determined by the traveling speed may be measured by a timer to detect that the adhesive belt 30 travels for one circumference.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with various modifications without departing from the scope of the invention.

[Brief description of the drawings]

FIG. 1 is an overall front view showing an embodiment of the present invention.

FIG. 2 is a plan view of a conveyor.

FIG. 3 is a side view of the dust removing roll and the adhesive belt.

FIG. 4 is a sectional view of a dust removing roll.

FIG. 5 is a front view of the dust removing roll.

FIG. 6 is an enlarged sectional view of a cleaning device.

[Explanation of symbols]

 10 ... Dust removal roll 16 ... Adhesive outer peripheral surface 30 ... Adhesive belt 31 ... Adhesive surface 32 ... Contact roll 37 ... Tension roll 45 ... Washing device 46 ... Washing roll 58 ... Drive roll W ... Work

Claims (2)

(57) [Claims] 1. A dust removing roll having an adhesive outer peripheral surface provided in a passage area of a work and rotating while the adhesive outer peripheral surface is in contact with the work; and a dust removing roll having an adhesive surface between a plurality of rolls. An endless adhesive belt provided so as to be able to run, and is provided on the inner peripheral side of the adhesive belt so as to be displaceable in a direction approaching or moving away from the dust removing roll along the dust removing roll. The adhesive surface of the belt is brought into contact with the adhesive outer peripheral surface of the dust removing roll and displaced away from the dust removing roll side so that the adhesive surface of the adhesive belt is in a non-contact state with the adhesive outer surface of the dust removing roll. A contact roll, a cleaning device for cleaning the adhesive surface of the adhesive belt when the adhesive belt and the dust removing roll are in a non-contact state, The contact roll is displaced to the dust removing roll side so as to make contact with the dust removing roll by the circumferential length, and the contact roll is displaced away from the dust removing roll side so that the adhesive belt is cleaned by the cleaning device. A dust removing device including a contact roll driving mechanism. 2. When the adhesive belt is brought into a non-contact state with the dust removing roll and is cleaned by the cleaning device, it is determined that the adhesive belt runs at a lower speed than when the adhesive belt travels in contact with the dust removing roll. The dust removing device according to claim 1, wherein: