JP4034501B2 - Horizontal conveying type surface treatment equipment for plate workpieces - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  TECHNICAL FIELD The present invention relates to a plate-like workpiece horizontal conveyance type surface treatment apparatus that performs surface treatment such as plating on a plate-like workpiece while conveying the plate-like workpiece horizontally while being sandwiched between upper and lower rollers. Concerning structure.
[0002]
[Prior art]
  As shown in FIG. 14, the plate-shaped workpiece horizontal conveyance type surface treatment apparatus moves the plate-shaped workpiece 1 horizontally between the lower roller 2 and the upper roller 3 while moving the plate workpiece 1 up and down with respect to the plate-shaped workpiece 1. The surface treatment liquid is brought into contact with the surface treatment. As the lower roller 2 and the upper roller 3, conventionally, a straight roller 4 as shown in FIG. 15 or a ring roller 5 as shown in FIG. 16 has been used. Incidentally, the ring roller 5 is configured by inserting a large number of ring members 51 through a roller shaft 52 and engaging them with a tenon structure or the like.
[0003]
[Problems to be solved by the invention]
  By the way, the plate-like workpiece 1 such as a printed circuit board is formed with a through hole for electrically connecting the front surface and the back surface using a drill or the like. There are many things. When dust adheres to the plate-like workpiece 1, when the straight roller 4 or the ring roller 5 is used, there are the following problems.
(1) Garbage was sandwiched between the plate-like workpiece 1 and the surface of the straight roller 4, and dents and scratches were made on the plate-like workpiece 1.
(2) Dust adheres to the surface of the straight roller 4, and dust adheres to the joint portion engaged with the tenon structure between the ring members 51 in the ring roller 5, and the surface treatment is, for example, electroless plating treatment. In some cases, plating progressed with the attached dust as a core, and it was necessary to replace the rollers 4 and 5 themselves.
(3) When plating progressed with the dust adhering to the rollers 4 and 5 as the core, the plating solution was decomposed and the life of the plating solution was shortened.
(4) When plating progressed with the rollers 4 and 5, the deposited plating film peeled off from the rollers 4 and 5, and adhered to the surface of the plate-like workpiece 1 as dust, resulting in poor plating.
(5) The plate-like workpiece 1 is clogged between the upper and lower ring rollers 5 due to the warpage originally caused by the plate-like workpiece 1 or the jet pressure of the surface treatment liquid, and particularly the thickness of the plate-like workpiece 1. Is as thin as 0.05 to 0.5 mm, so-called “jamming” is likely to occur, and it is difficult to stably convey the plate-like workpiece 1. Moreover, the external appearance defect which becomes the state which the plate-shaped workpiece 1 waved was easy to generate | occur | produce.
(6) Since the ring roller 5 is lightweight, the clamping force of the upper and lower ring rollers 5 on the plate-like workpiece 1 is weakened by the buoyancy and liquid flow of the ring roller 5 in the dipping process, and the plate-like workpiece 1 and the ring roller 5 Slipping between the two and the plate-like workpiece 1 was difficult to stably convey.
(7) Since the roller shaft 52 is thin and the ring member 51 is made of resin, the ring roller 5 is likely to be deformed by heat. Therefore, in the processing tank using a high temperature processing liquid, the plate-shaped workpiece 1 cannot be stably conveyed.
(8) When processing the inside of the through hole of the plate-like workpiece 1, the processing liquid is blocked, and the liquid level is kept high to increase the pressure or apply a strong jet to enter the through hole. The distribution of the treatment liquid is improved. However, since the ring roller 5 cannot block the processing liquid, the inside of the through hole cannot be processed sufficiently. Further, since the ring roller 5 is lightweight, the plate-like workpiece 1 is lifted when a strong jet is applied, and the plate-like workpiece 1 cannot be reliably clamped between the upper and lower ring rollers 5, and the plate-like workpiece 1 does not move. The workpiece 1 could not be conveyed stably.
[0004]
  The present invention can prevent dust from adhering to the roller to extend the life of the roller and the surface treatment liquid, reliably perform the surface treatment of the plate-like workpiece, and further stabilize the plate-like workpiece. It aims at providing the horizontal conveyance type surface treatment apparatus of a plate-shaped workpiece which can be conveyed.
[0005]
[Means for Solving the Problems]
  The invention according to claim 1 is an apparatus in which the surface treatment is performed by bringing a surface treatment liquid into contact with the plate-like workpiece while conveying the plate-like workpiece horizontally with the upper and lower rollers sandwiched therebetween. 0.05 to 5.0 mm, and at least one of the upper and lower rollers has a double structure in which a metal pipe is fitted in a resin pipe, and the resin pipe has a number of concave portions on the surface thereof.PartHaveBetween the concave portions of the surface is a convex portion,The recess has a depth of 0.5 mm to 1.0 mm.The concave part is a groove that is continuous in the circumferential direction, and there are few plate-like workpieces to be conveyed. The concave portions are formed so that the convex portions are opposed to at least the both end portions and the substantially central portion in the width direction, and the convex portions facing the both end portions in the width direction of the plate-like workpiece are formed wide.It is characterized by being.
The invention according to claim 2 is an apparatus in which the surface treatment is performed by bringing a surface treatment liquid into contact with the plate-like workpiece while conveying the plate-like workpiece horizontally with the upper and lower rollers sandwiched therebetween. 0.05 to 5.0 mm, and the upper and lower rollers have a double structure in which a metal pipe is fitted in a resin pipe, and the resin pipe has a number of recesses on the surface thereof. A convex portion is formed between the concave portions on the surface, the concave portion has a depth of 0.5 mm to 1.0 mm, and the upper and lower rollers have the same configuration. .
[0006]
  Claim3The described invention is claimed.2In the described invention, a large number of concave portions are distributed substantially uniformly.
[0007]
  Claim4The described invention is claimed.2In the described invention, the concave portion is a groove continuous in the circumferential direction.
[0008]
  Claim5The described invention is claimed.4In the described invention, the concave portion is formed so that the convex portion is opposed to at least both end portions in the width direction and the substantially central portion of the plate-like workpiece to be conveyed.
[0009]
  Claim6The described invention is claimed.5In the described invention, the convex portions opposed to the both end portions in the width direction of the plate-like workpiece are formed wide.
[0010]
  Claim7The described invention is claimed.5In the described invention, a plurality of convex portions facing the both end portions in the width direction of the plate-like workpiece are formed.
[0011]
  Claim8In the invention described in the first aspect, the upper and lower rollers have the same configuration.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
  The plate-like workpiece horizontal conveyance type surface treatment apparatus of this embodiment mainly performs surface treatment on a thin plate-like workpiece having a thickness of less than 0.1 mm. FIG. 1 is a front view showing upper and lower rollers used in a horizontal workpiece surface treatment apparatus for a plate-like workpiece according to the present embodiment, FIG. 2 is a plan view including adjacent rollers, and FIG. 3 is an enlarged cross section of a portion A in FIG. 4 and 4 are views corresponding to the IV-IV cross section of FIG. 1 including the upper and lower rollers adjacent to each other.
[0013]
  As shown in FIG. 3, the lower roller 6 has a double structure in which a metal pipe 62 is fitted in a resin pipe 61. Polypropylene, polyvinyl chloride, or the like is used as the resin that forms the resin pipe 61, and SUS, iron, or the like is used as the metal that forms the metal pipe 62. A shaft plug 63 is fitted into both ends of the metal pipe 62, and a roller shaft 64 is fixed to the shaft plug 63.
[0014]
  And the resin pipe 61 has many recessed parts 611 on the surface, and it is the convex part 612 between the recessed parts 611 of this surface. The recesses 611 are grooves having a rectangular cross section that is continuous in the circumferential direction, and are formed in the longitudinal direction of the resin pipe 61 at equal intervals W1 and equal widths W2. W3 = W1 + W2.
[0015]
  In FIG. 3, W1: W2 = 1: 1 to 1:35, preferably 1: 1 to 1:20, more preferably 1: 1 to 1: 5. Moreover, the area ratio of the recessed part 611 with respect to the whole surface of the range S (FIG. 1) contact | abutted with the plate-shaped workpiece | work 1 of the resin pipe 61 surface is set to the range of 45-98%. More specifically, W1 = 3 to 100 mm, particularly W1 = 3 to 25 mm is preferable, W2 = 3 to 100 mm, particularly W2 = 3 to 50 mm is preferable, and the depth D of the recess 611 is 0.5 to 1. 0 mm is preferable, and W3 = 6 to 200 mm, particularly W3 = 6 to 125 mm is preferable.
[0016]
  The upper roller 7 has the same configuration as the lower roller 6, and the lower roller 6 and the upper roller 7 are arranged so that the convex portion 612 and the convex portion 712 face each other. Further, as shown in FIG. 2, the upper roller 7 adjacent in the conveying direction of the plate-like workpiece 1 is located on the same straight line in the conveying direction (arrow X) as the convex portion 712 is indicated by a one-dot chain line in FIG. The same applies to the lower roller 6.
[0017]
  Next, the operation of the horizontal conveyance type surface treatment apparatus using the rollers 6 and 7 having the above configuration will be described.
  As shown in FIG. 4, when the roller shafts 64 and 74 are rotationally driven by a drive mechanism (not shown) and the rollers 6 and 7 are rotated as indicated by an arrow R, the plate-like workpiece 1 is projected by the convexity of the rollers 6 and 7. It is conveyed in the direction of arrow X while being sandwiched between the upper and lower parts 612 and 712, reaches the adjacent rollers 6 and 7, and is further conveyed in the same manner. At that time, the plate-like workpiece 1 is processed with the surface treatment liquid sprayed from above and below as indicated by the arrow Y between the adjacent rollers 6 and 7.
[0018]
  In the transport process as described above, when the dust 8 adheres to the plate-like workpiece 1, the following phenomenon occurs. That is, the surface treatment liquid sprayed as indicated by the arrow Y flows as indicated by the arrow Z in the recess 611 facing the plate-like workpiece 1. For this reason, when the portion of the plate-like workpiece 1 to which the dust 8 is attached faces the recess 611, the dust 8 is washed away by the flow of the arrow Z. Accordingly, the dust 8 is prevented from adhering to the lower roller 6. The same phenomenon occurs in the concave portion 711 of the upper roller 7.
[0019]
  As described above, even if the dust 8 is attached to the plate-like workpiece 1, the dust 8 is washed away in the recesses 611 and 711, so that the dust 8 adheres to the rollers 6 and 7 or remains on the surface of the plate-like workpiece 1. Is prevented. Therefore, the following effects are exhibited.
(1) The rubbish 8 adhering to the rollers 6 and 7 prevents dents and scratches from being formed on both the front and back surfaces of the plate-like workpiece 1.
(2) When the surface treatment is a plating treatment, the progress of plating with the dust 8 in the rollers 6 and 7 as a core is prevented. Accordingly, the life of the rollers 6 and 7 can be extended, and the life of the plating solution can be extended by preventing the decomposition of the plating solution. Moreover, the plating defect of the plate-like workpiece 1 can be prevented.
(3) Since the dust 8 is washed away in the surface treatment liquid, the life of the surface treatment liquid can be extended by subjecting the surface treatment liquid to a general filtration treatment to remove the dust from the surface treatment liquid.
[0020]
  Further, since the concave portions 611 and 711 are evenly distributed in the rollers 6 and 7, the clamping state of the plate-like workpiece 1 by the rollers 6 and 7 is not biased, and the plate-like workpiece 1 is shifted in the transport direction. It is conveyed without.
[0021]
  Incidentally, in order to prevent the dust 8 from adhering to the rollers 6 and 7 and the dust 8 from remaining on the surface of the plate-like workpiece 1, the area ratio of the recesses 611 and 711 on the surfaces of the rollers 6 and 7 is increased. preferable. However, if it is too large, the areas of the convex portions 612 and 712 that come into contact with the plate-like workpiece 1 are reduced, the clamping force of the rollers 6 and 7 to the plate-like workpiece 1 is weakened, and the force for conveying the plate-like workpiece 1 Cannot be fully exhibited, and stable conveyance tends to be difficult. However, in the apparatus configured as described above, in the roller 6, the recess 611 is formed such that the area ratio of the range S in contact with the plate-like workpiece 1 on the surface of the resin pipe 61 is 45% or more. 7, the recess 711 is formed in the same manner, so that it is possible to satisfactorily prevent the dust 8 from adhering to the rollers 6 and 7, and the area ratio of the recess 611 is also formed to be 98% or less. Further, since the concave portion 711 is formed in the same manner, the force for conveying the plate-like workpiece 1 by the rotational force of the rollers 6 and 7 can be sufficiently transmitted to the plate-like workpiece 1, and the plate-like workpiece 1 can be stabilized. Can be transported.
[0022]
  Moreover, in order to sufficiently surface-treat the inside of a through hole (not shown) formed in the plate-like workpiece 1, it is necessary for the surface treatment liquid to flow reliably through the through hole. If the depth D is too large, the surface treatment liquid easily flows into the recesses 611 and 711, and the height of the liquid level cannot be maintained, so that it is difficult to flow into the through hole. However, when the depth D is too small, the washing-off effect of the dust 8 is hardly exhibited. However, in the apparatus having the above configuration, the depth D of the concave portion 611 is set to 0.5 mm or more in the roller 6, and the depth D of the concave portion 711 is similarly set in the roller 7. Regardless of the thickness of the plate-like workpiece 1, the adhesion of the dust 8 to the plate-like workpiece 1 can be prevented, the washing effect of the dust 8 can be satisfactorily exhibited, and the depth D of the recess 611 is 1.0 mm. Since the depth D of the concave portion 711 is also set in the roller 7 in the same manner, the surface treatment liquid is blocked and the surface treatment liquid is sufficiently flowed into the through hole so that the through hole It is possible to reliably perform the process. In addition, since the depth D of the recesses 611 and 711 is set to a maximum of 1.0 mm, even when the thickness of the plate-like workpiece 1 is as thin as 0.05 to 0.5 mm, the plate-like workpiece 1 is Extreme bending can be prevented, jamming and appearance defects such as undulation can be prevented, and the plate-like workpiece 1 can be stably conveyed.
[0023]
  The reason why W1 is preferably 3 mm or more is to satisfy the wear resistance and the stable conveyance of the plate-like workpiece 1. In particular, when it is less than 3 mm, it is difficult to reliably make the convex portion 612 of the roller 6 and the convex portion 712 of the roller 7 face each other. The reason why W1 is preferably 25 mm or less is to prevent the occurrence of dents and the adhesion of dust 8 to a satisfactory level. It is preferable that W2 is 3 mm or more in order to exhibit the washing-off effect of the dust 8 to a satisfactory level, and it is preferable to set it to 50 mm or less to exhibit the blocking effect of the surface treatment liquid, Moreover, it is for preventing the bending of the plate-shaped workpiece 1. W3 is preferably set to 6 mm or more in order to exhibit the washing-off effect of the dust 8 to a satisfactory level, and is preferably set to 125 mm or less in order to prevent the plate-like workpiece 1 from being bent. .
[0024]
  If the upper roller 7 is lightweight, the plate-like workpiece 1 and the lower roller 6 are caused by the buoyancy of the upper roller 7 or the flow of the surface treatment liquid, as in the case of using the ring roller 5 shown in FIG. Or it becomes easy to generate | occur | produce slip between the upper side rollers 7, and the force for conveying with the rollers 6 and 7 is not fully transmitted to the plate-shaped workpiece 1, but the stable conveyance of the plate-shaped workpiece 1 becomes difficult. However, in the apparatus having the above-described configuration, the upper roller 7 has the metal pipe 72, so that the weight of the upper roller 7 can be adjusted to a size that prevents slippage. Therefore, the plate-like workpiece 1 can be stably conveyed.
[0025]
  Further, the lower roller 6 has a configuration in which the resin pipe 61 is firmly supported by the metal pipe 62 by fitting the metal pipe 62 into the resin pipe 61. Is prevented, and the lower roller 6 is also prevented from floating in the surface treatment liquid. The same applies to the upper roller 7. Therefore, also from this point, the plate-like workpiece 1 can be stably conveyed.
[0026]
(Embodiment 2)
  The plate-shaped workpiece horizontal conveyance type surface treatment apparatus of this embodiment also mainly performs surface treatment on a thin plate-shaped workpiece having a thickness of 0.05 to 0.5 mm. As shown in FIG. 5 corresponding to FIG. 2, the apparatus according to the present embodiment arranges adjacent upper rollers 7 so that the convex portions 712 are positioned in a staggered manner in the transport direction (arrow X). The roller 6 is similarly arranged.
[0027]
  The structure of the upper roller 7 is different from that of the first embodiment in the following points. The lower roller 6 has the same structure as the upper roller 7.
(1) W2 = 3 to 100 mm is preferable. The reason why W2 can be allowed to 100 mm is that the convex portions 712 of the adjacent upper rollers 7 are staggered in the transport direction.
[0028]
(2) The convex portions 712 at both ends are wider than the other convex portions 712. As a result, even if the plate-like workpiece 1 is slightly deviated from the conveying direction, both ends of the plate-like workpiece 1 are securely clamped by the convex portions 712 and 612 at both ends, so that jamming is prevented and the plate-like workpiece is prevented. 1 is carried out without any problem.
[0029]
  Note that the convex portions 712 at both ends may be formed of a plurality of convex portions 7121 as shown in FIG. The same applies to the convex portions 612 at both ends.
[0030]
(Embodiment 3)
  The horizontal conveyance type surface treatment apparatus for plate-like workpieces of this embodiment mainly performs surface treatment on thick plate-like workpieces having a thickness of 1.0 to 5.0 mm. FIG. 7 is a front view showing the upper and lower rollers used in the apparatus of this embodiment.
[0031]
  The upper roller 7 has convex portions 712 at the center and both ends. The convex portions 712 at both ends are wider than the central convex portion 712. The width W1 of the central convex portion 712 is preferably 3 to 100 mm, and particularly preferably 3 to 25 mm. The depth D of the recess 711 is preferably 0.5 to 1.0 mm. The width W2 of the recess 711 is approximately a value calculated by (W0−W1 × 3) / 2 when the width of the plate-like workpiece 1 is W0.
[0032]
  The lower roller 6 has the same structure as the upper roller 7.
[0033]
  Also by the apparatus of this embodiment, the same effect as Embodiment 1 can be obtained.
[0034]
  In addition, since the plate-shaped workpiece 1 processed by the apparatus of the present embodiment is mainly thick, it is difficult to bend, but even when it occurs, the depth D of the recess 711 is set in the above range, so Deflection can be prevented. Therefore, the plate-like workpiece 1 can be transported without hindrance only by being held at three points by the convex portions 712 and 612 at both ends and the center.
[0035]
  Further, even if the plate-like workpiece 1 is slightly deviated from the conveying direction, the both ends of the plate-like workpiece 1 are securely clamped by the wide protrusions 712 and 612 at both ends, so that the conveyance of the plate-like workpiece 1 is hindered. Done without.
[0036]
  Note that the convex portions 712 at both end portions may be composed of a plurality of convex portions 7121 as shown at both end portions of the roller in FIG. The same applies to the convex portions 612 at both ends.
[0037]
(Embodiment 4)
  In one upper roller 7, the width W2 of the concave portion 711, the depth D of the concave portion 711, and the width W1 of the convex portion 712 may be set at random. The same applies to the lower roller 6.
[0038]
  For example, as shown in FIG. 8, W2 may be set unevenly, and a convex portion 712 may be provided at a position where a plate-like workpiece 1 of various dimensions is expected to pass. According to the upper and lower rollers 6 and 7 shown in FIG. 8, when the plate-shaped workpiece 1 having a large width is conveyed, both end portions of the plate-shaped workpiece 1 are sandwiched between the convex portions 712 and 612 of the B portion, When transporting the plate-like workpiece 1 having a small size, as shown in FIG. 9, it is sandwiched between convex portions 712 and 612 of the C portion.
[0039]
  The horizontal conveyance type surface treatment apparatus including the rollers 6 and 7 having the above-described configuration includes a thin plate-like workpiece 1 having a thickness of less than 1.0 mm and a thick plate-like workpiece having a thickness of 1.0 to 5.0 mm. It can be applied to both. If the random setting has regularity, it becomes easy to design and process the roller, and the positional deviation of the roller, the meandering of the plate-like workpiece 1, and the conveyance of the plate-like workpiece 1 of various dimensions, Can be easily accommodated.
[0040]
(Embodiment 5)
  The recesses 611 and 711 may be formed as depressions as shown in FIG. 10 instead of the grooves as in the first embodiment. 11 is a cross-sectional view taken along line XI-XI in FIG. Also by this, as shown in FIG. 12 corresponding to the XII-XII cross-sectional view of FIG. 10, the surface treatment liquid flows in the recesses 611 and 711 as indicated by the arrow Z. The effect can be demonstrated. In this case, the area ratio and depth of the depressions are set from the same viewpoint as in the first embodiment.
[0041]
(Another embodiment)
(1) The convex portion 712 of the upper roller 7 and the convex portion 612 of the lower roller 6 do not necessarily all face each other, but preferably face each other.
[0042]
(2) The upper roller 7 and the lower roller 6 do not necessarily have the same structure. Even in that case, the same effects as described above can be obtained to a satisfactory degree.
[0043]
(3) As shown in FIG. 13, the width W1 of the convex portion 612 of the lower roller 6 and the width W1 of the convex portion 712 of the upper roller 7 may be different. However, the distance L1 between the centers of the adjacent convex portions 612 and the distance L1 between the centers of the adjacent convex portions 712 are preferably set to be the same. According to this, the deviation between the convex portion 612 and the convex portion 712 is absorbed, and the two are reliably opposed to each other. The width W1 of the convex portion 712 of the upper roller 7 is preferably smaller than the width W1 of the convex portion 612 of the lower roller 6.
[0044]
(4) As shown in FIG. 13, the depth D of the recess 611 of the lower roller 6 and the depth D of the recess 711 of the upper roller 7 may be different. According to this, it is possible to use a roller having a depth set in accordance with the purpose, for example, mainly for preventing dust adhesion.
[0045]
(5) Instead of one of the upper roller 7 and the lower roller 6, a conventional straight roller 4 or ring roller 5 may be used. Even in that case, the same effects as described above can be obtained to a satisfactory degree.
[0046]
(6) The cross-sectional shape of the recesses 611, 711 may be a triangle, a semicircle, or the like. Moreover, the recessed part 611,711 may not be continuous, for example, may be formed in a scattered point. Further, the recesses 611 and 711 may extend in a spiral shape, for example, instead of in the circumferential direction.
[0047]
(7) The method of bringing the surface treatment liquid into contact with the plate-like workpiece 1 is not limited to the method of spraying the surface treatment liquid in the treatment liquid as in the above embodiment, or the method of spraying the surface treatment liquid from the air or You may employ | adopt the method only to immerse in a surface treatment liquid.
[0048]
(8) The thickness of the plate-like workpiece 1 conveyed in the present invention is not particularly limited. The present invention can be suitably applied to a thick plate having a general thickness of 1.0 mm or more or a thin plate having a thickness of less than 1.0 mm.
[0049]
【The invention's effect】
  Claim 1Or 2According to the described invention, since at least one of the upper and lower rollers has a concave portion on the surface thereof, the flow of the surface treatment liquid that can make the dust adhering to at least one of the front and back surfaces of the plate-like workpiece into the concave portion Therefore, the dust can be prevented from adhering to the roller and remaining on the surface of the plate-like workpiece. Therefore, the following effects can be exhibited.
(1) It is possible to prevent dents and scratches from being formed on the back surface of the plate-like workpiece due to dust adhering to the roller.
(2) In the case where the surface treatment is a plating treatment, it is possible to prevent the progress of plating centering on dust in the roller. Therefore, the life of the roller can be extended, and the life of the plating solution can be extended by preventing the decomposition of the plating solution. Also, plating defects on the surface of the plate-like workpiece can be prevented.
(3) The life of the surface treatment liquid can be extended by washing away the waste in the surface treatment liquid and subjecting the surface treatment liquid to a general filtration treatment to remove the dust from the surface treatment liquid.
  Furthermore, since the depth of the concave portion is set to 0.5 mm or more, it is possible to prevent the adhesion of dust to the plate-like workpiece, to the extent that the washing out effect of the dust can be satisfied, and the depth of the concave portion is 1 Since the thickness is set to 0.0 mm or less, the surface treatment liquid can be blocked and the surface treatment liquid can be sufficiently flowed into the through hole to reliably perform the treatment in the through hole. In addition, since the depth of the concave portion is set to a maximum of 1.0 mm, the plate-shaped workpiece can be extremely bent even when the thickness of the plate-shaped workpiece is as thin as 0.05 to 0.5 mm. It is possible to prevent the occurrence of jamming and appearance defects such as waving, and the plate-like workpiece can be stably conveyed.
[0050]
  In addition, if the roller is an upper roller, the upper roller has a double structure in which a metal pipe is fitted in a resin pipe, so that the weight of the upper roller can be increased by changing the thickness and material of the metal pipe. Can be adjusted. Therefore, the weight of the upper roller can be set to a size that prevents slippage between the upper and lower plate-like workpieces, and hence the plate-like workpiece can be stably conveyed.
Furthermore, according to the first aspect of the present invention, the recess can be easily formed, and workability can be improved. Moreover, the flow of the surface treatment liquid in the recess can be formed smoothly, and the washing-off effect of dust can be improved. Further, the plate-like workpiece can be sandwiched at least between the both ends in the width direction and the substantially central portion, and thus the plate-like workpiece can be stably conveyed. Further, even if the plate-like workpiece is slightly deviated from the conveying direction, the both end portions of the plate-like workpiece can be securely held by the convex portions at both ends, and therefore the plate-like workpiece can be stably conveyed.
Further, according to the second aspect of the present invention, the above-described effects can be exhibited in the lower roller as well.
[0051]
  Claim3According to the described invention, since the roller has a large number of concave portions distributed on the surface substantially uniformly, it is possible to prevent the sandwiching state of the plate-like workpiece between the upper and lower rollers, and hence the plate-like workpiece. Can be prevented from shifting in the transport direction.
[0052]
  Claim4According to the described invention, the recess can be easily formed, and workability can be improved. Moreover, the flow of the surface treatment liquid in the recess can be formed smoothly, and the washing-off effect of dust can be improved.
[0053]
  Claim5According to the described invention, the plate-like workpiece can be sandwiched at least between the both end portions in the width direction and the substantially central portion, and thus the plate-like workpiece can be stably conveyed.
[0054]
  Claim6 or 7According to the invention described in (2), even if the plate-like workpiece is slightly deviated from the conveying direction, both end portions of the plate-like workpiece can be securely held by the convex portions at both ends, and therefore the plate-like workpiece can be stably conveyed.
[0055]
  Claim8According to the described invention, the above-mentioned effect according to the first aspect can be exhibited in the lower roller as well.
[Brief description of the drawings]
FIG. 1 is a front view showing upper and lower rollers used in a horizontal conveying surface treatment apparatus for a plate-like workpiece according to a first embodiment.
FIG. 2 is a plan view including adjacent rollers.
FIG. 3 is an enlarged cross-sectional view of a portion A in FIG.
4 is a view corresponding to the IV-IV cross section of FIG. 1 including adjacent upper and lower rollers.
FIG. 5 is a plan view corresponding to FIG. 2 of a plate-like workpiece horizontal conveyance type surface treatment apparatus according to a second embodiment;
6 is a front view of another example of a roller in Embodiment 2. FIG.
FIG. 7 is a front view showing upper and lower rollers used in a horizontal conveying surface treatment apparatus for a plate-like workpiece according to a third embodiment.
FIG. 8 is a front view showing upper and lower rollers used in a horizontal conveying surface treatment apparatus for a plate-like workpiece according to a fourth embodiment.
FIG. 9 is a front view showing an operating state different from FIG.
FIG. 10 is a partial front view showing a recess according to another embodiment.
11 is a cross-sectional view taken along line XI-XI in FIG.
12 corresponds to the XII-XII cross-sectional view of FIG. 10, and is a cross-sectional partial view showing an operating state when the roller of FIG. 10 is used.
FIG. 13 is a partial sectional view of upper and lower rollers according to still another embodiment.
FIG. 14 is a cross-sectional view of a main part of a conventional general horizontal surface treatment apparatus for plate-like workpieces.
FIG. 15 is a front view showing a conveying process of a plate-like workpiece using a straight roller.
FIG. 16 is a front view showing a conveyance process of a plate-like workpiece using a ring roller.
[Explanation of symbols]
  1 Plate work
  6 Lower roller
  61 Resin pipe
  611, 711 recess
  612,712 Convex
  62, 72 Metal pipe
  7 Upper roller

Claims (8)

In an apparatus for performing a surface treatment by bringing a surface treatment liquid into contact with a plate-like workpiece while conveying the plate-like workpiece horizontally by sandwiching it between upper and lower rollers,
The thickness of the plate workpiece is 0.05 to 5.0 mm,
At least one of the upper and lower rollers has a double structure in which a metal pipe is fitted in a resin pipe,
Said resin pipe has a large number of concave portions on the surface thereof, between the recesses of the surface is a convex portion,
The recess has a depth of 0.5 mm to 1.0 mm ,
The recess is a groove that is continuous in the circumferential direction,
The concave portion is formed so that the convex portion is opposed to at least the both ends in the width direction and the substantially central portion of the plate-like workpiece to be conveyed,
2. A plate-like workpiece horizontal conveyance type surface treatment apparatus , wherein convex portions facing the both end portions in the width direction of the plate-like workpiece are formed wide . In an apparatus for performing a surface treatment by bringing a surface treatment liquid into contact with a plate-like workpiece while conveying the plate-like workpiece horizontally by sandwiching it between upper and lower rollers,
The thickness of the plate workpiece is 0.05 to 5.0 mm,
Low La vertically, has the double structure fitted in a metal pipe the plastic pipe,
Said resin pipe has a large number of concave portions on the surface thereof, between the recesses of the surface is a convex portion,
The recess has a depth of 0.5 mm to 1.0 mm ,
A horizontal conveying surface treatment apparatus for plate-like workpieces, wherein the upper and lower rollers have the same configuration . The horizontal conveyance type surface treatment apparatus for plate-like workpieces according to claim 2, wherein a large number of concave portions are distributed substantially uniformly. The horizontal conveyance type surface treatment apparatus for plate-like workpieces according to claim 2 , wherein the recess is a groove continuous in the circumferential direction. The horizontal conveyance type surface treatment apparatus for plate-like workpieces according to claim 4 , wherein the depressions are formed so that the projections are opposed to at least both ends in the width direction and the substantially central portion of the plate-like workpiece to be conveyed. The horizontal conveyance type surface treatment apparatus for plate-like workpieces according to claim 5 , wherein the convex portions facing the both end portions in the width direction of the plate-like workpiece are formed wide. The horizontal conveyance type surface treatment apparatus for a plate-shaped workpiece according to claim 5 , wherein a plurality of convex portions facing the both end portions in the width direction of the plate-shaped workpiece are formed.   The plate-type workpiece horizontal conveyance type surface treatment apparatus according to claim 1, wherein the upper and lower rollers have the same configuration.

Images