JP3026473B2 - 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 is a passing area of a work conveyed in one direction by a conveying mechanism composed of a number of feed rolls that are arranged horizontally and rotating or a conveying mechanism composed of a feed belt horizontally stretched between the rolls. In addition to providing a rotating brush, a dust suction duct connected to the suction side of the dust collection fan device is provided, and the surface of the work is rubbed with the rotating brush to remove dust from the work and to remove the removed dust with air. It is sucked into the dust collection duct together.

[0004]

However, even if the dust is removed as described above, not only the dust adhering to the surface of the work cannot be sufficiently removed, but also the work cannot be removed by the rotating brush. There is a possibility that some of the dust removed from the work may not adhere to the dust suction duct but adhere to the work again, and the dust cannot be completely removed from the surface of the work.

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

[0006]

According to the present invention, there is provided a dust removing apparatus, comprising: a cleaning work position for rolling a workpiece conveyed by a transport mechanism by bringing the workpiece into contact with an outer peripheral dust-removing adhesive surface in an area where the workpiece passes; In a device having a plurality of dust removing rolls that move between a cleaning pause position for separating a dust removing adhesive surface from a work, a position facing a dust removing roll in a transport mechanism is rotated by receiving power from a motor. A receiving roll is provided, and at one end of the dust removing roll and the receiving roll, a gear is provided that meshes with each other when the dust removing roll is at the cleaning operation position and positively rotates the dust removing roll. Cleaning work position
In, and is characterized in that the close contact with its own weight, subjected to the work on the roll.

[0007]

According to the structure of the present invention, the dust removing roll is connected to the motor via the gear provided between the dust removing roll and the receiving roll.
Receiving power from, the positively rotated, Ru can draw workpiece receiving between the rolls. Thereby , even if the work is a discontinuous body, the work can be smoothly transported without stagnation. Moreover, removal
The dust roll always tries to descend by its own weight.
Therefore, even if the thickness of the workpiece fluctuates slightly,
You can wear it.

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[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 structure is such that a dust removing mechanism 20 is provided above a transfer mechanism 10 for a workpiece W in a housing 100, and a peeling mechanism 50 is provided above the dust removing mechanism 20. .

<Transport Mechanism 10> First, the transport mechanism 10 will be described. Inside the housing 100, a plurality of feed rolls 11 are supported in parallel, and a chain 13 is wound around a sprocket 12 provided at one end of each feed roll 11, and all feed rolls 11 are driven by a motor (not shown). Are rotated at the same speed, and these feed rolls 11
Is transported in the direction of the arrow in FIG.
In the case of the present embodiment, the transport speed is 5 to 15 m / min.

Two receiving rolls 15, 15 spaced apart in the transport direction are provided in the transport path of the workpiece W in the transport mechanism 10.
Is driven by a motor (not shown) at the same peripheral speed as the feed roll 11 to form a transport surface of the work W together with the feed roll 11.

A driving gear 16 is provided at one end of each receiving roll 15.
Is attached. The drive gear 16 is for rotating a dust removing roll 21 described later.

<Dust Removal Mechanism 20> Next, the dust removal mechanism 20 will be described. Two receiving rolls 1 of the transport mechanism 10
Immediately above 5 and 15, a first dust removing roll 21a located on the upstream side in the transport direction and a second dust removing roll 21b located on the downstream side are provided. These dust removing rolls 21
As shown in FIG. 4, bosses 23 are respectively fitted to both ends of a cylindrical support 22 and a pivot 24
Is fixed on the outer peripheral surface of the cylindrical support 22, for example, a urethane rubber plate 25 is wound.
Its outer diameter is 150 mm.

The urethane rubber plate 25 has a chemical structure expressed as polyurethane and has a specific gravity of 1.00 to 1.0.
30. The surface of the urethane rubber plate 25 has adhesiveness, and from the viewpoint of removing adhesion of dust, the hardness of the urethane rubber plate 25 is preferably 10 to 30 °, and in this embodiment, the hardness is 30 °. You are using Due to the adhesive performance of the urethane rubber plate 25, the outer peripheral surface of the dust removing roll 21 is a dust removing adhesive surface 26.

Next, the support structure of the dust removing roll 21 will be described. Elevating blocks 27 are fixed to both ends of the pivot 24 of the dust removing roll 21.
7 is guided up and down freely in a state where the protrusions 28 on both side surfaces thereof are fitted into the guide grooves 30 of two lifting guides 29 fixed to the housing 100.

An air cylinder 31 is provided between the lift guides 29, 29, and a rod 32 projecting upward is provided.
Corresponds to the bottom surface of the lifting block 27. Rod 32
Moves up, the elevating block 27 is pushed up, and the dust removing roll 21 rises, and the receiving roll 15 of the transport mechanism 10 is moved.
When the rod 32 is retracted while being separated from the upper workpiece W, the dust removing roll 21 is lowered by its own weight to a position where the dust removing roll 21 sandwiches the workpiece W with the receiving roll 15.

The two air cylinders 31, 31 are driven by a control mechanism (not shown) provided with a timer in which the switching time is set in advance. When activated, one dust removing roll 21 is raised and the other dust removing roll 21 is lowered.

A driven gear 33 is attached to one end of the dust removing roll 21. When the dust removing roll 21 rises and separates from the work W on the receiving roll 15, the driven gear 33 comes off the driving gear 16 of the receiving roll 15, Dust removal roll 21
Is lowered to a position sandwiching the work W with the receiving roll 15, the driven gear 33 meshes with the drive gear 16. When the driven gear 33 is engaged with the drive gear 16, the dust removing roll 21 is driven to rotate at the same peripheral speed as the transport speed of the transport mechanism 10.

<Peeling Mechanism 50> The peeling mechanism 50 is for removing dust transferred from the work W to the dust removing roll 21 in the dust removing mechanism 20 from the dust removing roll 21. The belt 52 is wound around.

The peeling belt 52 has a structure in which a belt-like adhesive material 54 made of a special adhesive elastomer is adhered to an outer peripheral surface of a belt-like base material 53 for elongation prevention. It has an adhesive surface 55. The adhesive force of the adhesive surface 55 for peeling is stronger than that of the adhesive surface 26 for dust removal of the dust removing roll 21, and when the adhesive surfaces 26 and 55 come into close contact with each other, the adhered substance on the adhesive surface 26 for dust removal is removed. It is adapted to be transferred to the surface 55. Further, the deposits on the adhesive surface for peeling 55 can be easily removed by rubbing with water, so that the adhesive performance of the adhesive surface for peeling 55 is maintained.

Next, the roll around which the peeling belt 52 is wound will be described. First and second dust removing rolls 21
A first press roll 56a and a second press roll 56b are provided directly above the a and 21b, respectively. These holding rolls 56 are provided with air cylinders 58 at both ends of a pivot shaft 57.
Is supported by being fixed to a rod 59 protruding downward. The peeling belt 52 travels from the second press roll 56b toward the first press roll 56a while bringing the base material 53 into contact with the lower surfaces of the press rolls 56a and 56b.

The pressing rolls 56 contact the peeling adhesive surface 55 with the peeling belt 52 sandwiched between the pressing rolls 56 and the pressing roll 56 when the dust removing rolls 21 are raised, and the dust removing rolls 21 are lowered. Is set to a height that is separated from the peeling belt 52.

At the side of the first holding roll 56a, a pivot 6
1 is provided with a tension roll 60 supported by an upward rod 63 of an air cylinder 62, and the height of the tension roll 60 is set at a predetermined position higher than the presser roll 56 by the operation of the air cylinder 62. .

The peeling belt 52 has the adhesive surface 5 for peeling.
5 travels in a state of being hung around while being in contact with the tension roll 60, for example, a silicone rubber plate 64 is wound around the outer periphery of the tension roll 60, and the peeling adhesive surface 55 is provided on the silicone rubber plate 64. It does not stick even if it comes in close contact.

A water washing device 70 is provided further to the side of the tension roll 60. The washing device 70 includes a washing roll 71 supported at a lower height than the tension roll 60. The peeling belt 52 is turned around while the base material 53 is in contact with the rinsing roll 71, turned, and then runs upward.

A washing tank 73 supported by an elevating device 72 is provided below the washing roll 71. In the washing tank 73, a flow rate of, for example, 5 liter / min. The washing water 74 is stored in a fixed amount in a state where the washing water 74 is injected, and a rotating brush 75 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 74. I have.

The height of the washing tank 73 is set so that the washing rotary brush 75 comes into contact with the peeling adhesive surface 55 of the portion of the peeling belt 52 that is wrapped around the washing roll 71 in the washing water 74. Is set.

It is to be noted that a filter may be provided in a drainage path of the washing water 74 flowing out of the washing tank 73 so as to filter the washing water 74 so as to prevent foreign substances in the washing water 74 from dripping. desirable.

Above the washing roll 71, a draining device 8 is provided.
0 is provided. The draining device 80 is provided with the draining lower holding roll 81a and the draining lower receiving roll 82a arranged side by side at the same height, and the draining upper holding roll 81b and the draining upper receiving roll 82b at the same height. It becomes the structure provided side by side.

Each of the rolls 81 and 82 has a cylindrical sponge 84 mounted on the outer periphery of a core tube 83. The sponge 84 is made of a hydrophilic polymer, polyvinyl alcohol, as a raw material and has very fine continuous pores. It is made of a material having better water absorption and water retention capacity and also having flexibility and abrasion resistance. In the sponge 84, the lower draining rolls 81a and 82a are coarse, and the upper draining rolls 81b and 82b are fine.

The upper and lower draining press rolls 81
a, 81b are supported by a rod 86 projecting in the horizontal direction of the air cylinder 85 via a bracket 87, and upper and lower draining receiving rolls 82a, 82b are fixedly supported by the housing 100, By the operation of the air cylinder 85, the draining presser rolls 81a, 81
b sandwiches the peeling belt 52 running upward between the draining receiving rolls 82a and 82b.

A drying device 90 comprising a box-shaped drying oven 91 is provided above the draining device 80. An inlet hole 92 through which the peeling belt 52 passes is formed on the lower surface of one end of the drying furnace 91, and an outlet hole 93 through which the peeling belt 52 passes is formed on the other side surface of the drying furnace 91.

A first turning roll 94 is supported inside the drying furnace 91, and a second turning roll 95 is supported near the outlet hole 93 outside the drying furnace 91. After passing through the inlet hole 92, the belt 52 turns and runs horizontally by contacting the base material 53 with the first turning roller 94 and runs horizontally, passes through the outlet hole 93 and exits from the drying furnace 91. Then, the substrate 53 is turned by being brought into contact with the second turning roll 95 and hung around, and travels downward toward the second pressing roll 56b.

In the drying oven 91, hot air of, for example, 60 to 80 ° C. is blown from both upper and lower sides toward the surface of the base material 53 of the peeling belt 52 running in the drying oven 91 and the adhesive surface 55 for peeling. One blower 96 is provided.

The rotational force of the second diverting roll 95, which is driven to rotate by a motor (not shown), and the first diverting roller interlockingly rotating with the second diverting roll 95 via a chain (not shown) extended between sprockets (not shown). Due to the rotational force of the roll 94, the peeling belt 52 circulates and runs along the above-described path. The traveling speed of the peeling belt 52 is lower than the transport speed of the transport mechanism 10, and is 0.5 m / min in this embodiment.

Next, the operation of this embodiment will be described.

First, the transport mechanism 10 is operated to transport the work W to which dust has adhered to the upper surface, the first dust removing roll 21a is lowered, and the driven gear 33 is engaged with the driving gear 16 of the roll 15 to receive the driven gear 33. While rotating, the second dust-removing roll 21b is raised to bring the dust-removing adhesive surface 26 into close contact with the peel-off adhesive surface 55 of the peeling belt 52, and the peeling belt 52 is run.

Then, while the work W passes between the receiving roll 15 and the first dust removing roll 21a, the first dust removing roll 21a rolls on the upper surface of the work W while keeping the dust removing adhesive surface 26 in close contact. Then, the dust on the upper surface of the work W adheres to the adhesive surface for dust removal 26 and is removed by being transferred to the first dust removal roll 21a. The work W from which the dust has been removed passes below the second dust removing roll 21b without contact.

When the dust removing roll 21 rolls on the upper surface of the work W, the rod 32 of the air cylinder 31 is separated from the bottom of the lifting block 27, and the dust removing roll 21 always tries to descend by its own weight. Work W
Even if the thickness of the film slightly changes, the film comes into close contact with it.

When the switching time set by the timer (not shown) elapses, before the adhesive force of the first dust removing roll 21a is greatly reduced, the air cylinders 31 and
At the same time, the first dust removing roll 21a rises and the second dust removing roll 21b descends.

The lowered second dust removing roll 21b is driven to rotate by engaging its driven gear 33 with the driving gear 16 of the feed roll 15, and the first dust removing roll 2b described above is rotated.
As in 1a, dust adhering to the upper surface of the work W is transferred to the dust-removing adhesive surface 26 of the second dust-removing roll 21b.

During this time, the raised first dust removing roll 21a
Rolls while adhering to the peeling adhesive surface 55 of the traveling peeling belt 52, and the dust on the dust removing adhesive surface 26 of the first dust removing roll 21a is released by the strong adhesive force of the peeling adhesive surface 55. Then, the dust removing capability of the first dust removing roll 21a is restored.

The peeling belt 52 from which dust has been removed from the first dust removing roll 21a first passes through a water washing device 70. In the water washing device 70, the peeling adhesive surface 55 is rubbed with the cleaning rotary brush 75 in the cleaning water 74 and
2 dust is removed.

After the dust is removed in this manner, the peeling belt 5
2 passes through the draining device 80. In the draining device 80, the water adhering in the washing device 70 is passed through the lower draining rolls 81 a and 82 a and the upper draining rolls 81 b and 82 b while being sandwiched between the draining rolls 81 a and 82 a in order. It is absorbed by 81 and 82 and almost removed.

After most of the water has been removed, the peeling belt 52
Passes through the drying device 90. In the drying device 90,
The hot air blown from the two blowers 96, 96 evaporates the moisture remaining on the peeling belt 52 and completely removes it, and the peeling belt 52 recovers the adhesive ability. After the adhesive ability has been recovered in this way, the peeling belt 52 removes dust adhering to the first dust removing roll 21a again.

Then, by the operation of the timer (not shown), the first dust removing roll 21a descends in a state where the adhesive force has been completely recovered, and removes dust from the work W again.
Before the second dust removing roll 21b greatly reduces its adhesive strength, the dust removed from the work W and removed from the work W
2 will be transferred.

As described above, the first dust removing roll 21a
By repeating the operation in which the second dust removing roll 21b moves up and down alternately at regular intervals, dust removal from the work W can be continuously performed over a long period of time.

Further, since the peeling belt 52 runs at a low speed, the time for completely drying the peeling belt 52 after washing with water can be secured without significantly increasing the length of the peeling belt 52. Can sufficiently recover the adhesive ability.

As described above, according to the present embodiment, since the dust removing roll 21 rolls on the upper surface of the work W, the dust on the upper surface of the work W is completely removed by the adhesive force of the adhesive surface 26 for dust removal. be able to. Moreover, since the dust transferred to the dust removing roll 21 is removed by the peeling belt 52,
The adhesion ability of the dust removing roll 21 is maintained, and the dust removing roll 21
No replacement is required.

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 dust-removing adhesive 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 21 is formed by attaching the urethane rubber plate 25 to the surface of the cylindrical support 22. However, the present invention is not limited to this. May be provided with urethane rubber.

(3) In the above embodiment, two dust removing rolls 21a and 21b are provided so as to be moved up and down alternately. However, three or more dust removing rolls are provided and lifted and lowered separately in a fixed cycle. While at least any one of the dust removing rolls removes dust from the work, another dust removing roll may be configured to remove dust by the peeling belt.

(4) In the above embodiment, the dust adhering to the dust removing roll 21 is removed by circulating while washing with water and drying using the endless peeling belt 52, so that the dust is reused. A configuration in which one long peeling belt wound between two drums travels one way from one drum side to the other drum side, or may travel back and forth between both drums while washing with water.

(5) As described in (4), when the peeling belt is configured to run one way without washing with water between the two drums, the running speed of the peeling belt, that is, the peeling belt is in close contact with the peeling belt. The rotation speed of the rolling dust-removing roll is made faster than the conveying speed of the work, contrary to the above-described embodiment, and the total area of the peeling adhesive surface of the peeling belt that is in close contact with the dust-removing adhesive surface of the dust removing roll is increased. Thus, the adhesive ability of the dust removing roll can be restored in a short time.

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 a front view partially showing a cross section of an embodiment of the present invention.

FIG. 2 is a plan view of a transport mechanism.

FIG. 3 is a side view of a main part.

FIG. 4 is a sectional view of a part of a dust removing mechanism and a peeling mechanism.

FIG. 5 is a front view of a part of a dust removing mechanism and a peeling mechanism.

FIG. 6 is an overall front view of a dust removing mechanism and a peeling mechanism.

FIG. 7 is a sectional view of a peeling belt.

FIG. 8 is a sectional view of a draining roll.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Conveying mechanism 21a ... First dust removing roll 21b ... Second dust removing roll 26 ... Adhesive surface for dust removal 52 ... Peeling belt 55 ... Adhesive surface for peeling

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-258951 (JP, A) JP-A-62-107487 (JP, A) JP-A-61-71433 (JP, U) JP-A-6-107433 (JP, U) 23964 (JP, U) Fully open Hei 3-128482 (JP, U) Really open 63-136784 (JP, U)

Claims (1)

(57) [Claims] 1. A cleaning operation position in which an outer peripheral dust-removing adhesive surface is brought into contact with a workpiece in a region where the workpiece conveyed by a transport mechanism passes, and cleaning for separating the dust-removing adhesive surface from the workpiece. In the apparatus provided with a plurality of dust removing rolls that move between a rest position, at a position facing the dust removing roll in the transport mechanism,
A receiving roll that rotates by receiving power from a motor is provided, and one end of the dust removing roll and one end of the receiving roll are engaged with each other when the dust removing roll is at the cleaning operation position, and the dust removing roll is positively activated. gear for rotating is provided, further, the dust rolls, in the cleaning position, its weight
At the receiving dust removing system characterized by close contact with the workpiece on a roll.