JPH0827599A - Liquid level maintaining gate - Google Patents

Abstract

PURPOSE:To form a liquid level maintaining gate which opens and closes the partition wall between adjacent liquid tanks having a difference in level of the liquid at the time of horizontally moving works between both tanks, into a construction which is simple and wears less and to reduce the amt. of liquid leakage at the time of opening and closing the gate. CONSTITUTION:This liquid level maintaining gate 10 opens and closes with a decreased amt. of liquid leakage at the time when the works 22 progressing horizontally along a transporting line 20 passes the opening formed at the partition wall 16 between the first liquid tank 12 and the second liquid tank 14 varying in the liquid level. A gate member formed into a bottomed cylindrical shape has a work passage notch formed in the transporting line 20 direction, and while the works 22 having entered the internal space therefrom progresses in the space, the work rotates. The progression of the works by setting the work passage notch 38 on the exit side of the works 22 is possible. The gate member and a guiding member are held sealed from each other in a liquid-tight state by a sealing member during this time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when an object such as a work is horizontally moved from an opening formed in a partition between liquid tanks having different liquid surface heights, the opening is closed before and after the passage of the object. At the same time, the present invention relates to a liquid level maintenance gate that minimizes liquid leakage during passage.

[0002] The present invention, for example, when a workpiece is immersed in a liquid treatment tank for plating, alumite treatment, electrolytic polishing, electrolytic pickling, printed circuit board through-hole plating, CFC alternative cleaning, jig peeling, etc. The present invention is applied to a gate that opens and closes a passage opening when moving the work from a liquid tank to an adjacent liquid tank, and minimizes the amount of liquid leakage at the passage opening.

[0003]

2. Description of the Related Art Conventionally, for example, in processes such as plating treatment and electrolytic pickling, a plurality of types of liquid treatment tanks are lined up and a work is hung by a conveying device (rack and barrel) called an elevator or a carrier. After immersing in one liquid processing tank for a certain period of time, lifting it, moving it to the adjacent liquid processing tank as it is, lowering it, and immersing it in the liquid processing tank. The treatment is performed by immersion. Such a work transfer method is conventionally called air transfer.

In this carrying method, the lower the work, the longer the time of immersion in the treatment liquid, and in plating, for example, the plating film pressure becomes uneven up and down.

Further, the above-mentioned conventional apparatus has a large loss time due to air transfer, and usually requires 5 seconds for each of the steps of raising and lowering and horizontal movement of the work at the time of air transfer. If 8 hours is set to 8 hours, the time for vertical movement and horizontal movement in the air becomes 10 hours, and there is a problem that the work efficiency is extremely low.

Further, in order to compensate for the loss time due to the air transfer, many works are mounted on one rack and moved, so that the liquid processing tank inevitably becomes large, and therefore the apparatus space becomes excessive. In addition, there is a problem that a large amount of processing liquid is required.

Further, when the capacity of the liquid processing tank is large as described above, it is difficult to separately provide a management tank for managing the processing liquid. There was a problem that quality deterioration had to be prevented.

In contrast to these, for example, Japanese Patent Laid-Open No. 2-182
As disclosed in Japanese Laid-Open Patent Publication No. 895, there is an apparatus for performing a plating process while continuously moving a work in a horizontal direction.

[0009] However, this device is a strip (wire)
However, there is a problem in that a machine having an independent shape such as a machine part cannot be processed.

In view of the above, the present applicant has filed Japanese Patent Application No. 5-3.
No. 10158 proposes a horizontal traveling continuous dipping treatment device capable of continuously performing horizontal traveling and liquid treatment even for mechanical parts and the like.

This apparatus is provided with a gate provided with a shutter plate that opens and closes the opening formed in the boundary wall of the adjacent liquid processing tank from the left and right, opens this gate when the work passes, and closes the gate after passing the work. It is designed to prevent liquid leakage.

Further, the applicant of the present invention has filed Japanese Patent Application No. 6-76898.
Proposed a liquid level maintenance gate that has a simple structure, is small and lightweight, has little wear, does not require a motor for opening and closing, and has a small amount of liquid leakage.

[0013]

However, since the gate in the horizontal traveling continuous immersion treatment apparatus must open and close the shutter plate by resisting a high hydraulic pressure, it is highly worn and strong in opening and closing. There is a problem that a drive mechanism is required and the amount of liquid leakage when the shutter plate is opened is relatively large.

Further, in the liquid level maintaining gate of Japanese Patent Application No. 6-76898, since the gate member makes strong contact with the work due to liquid pressure, it is suitable for a work that is easily deformed or a work that requires precise plating. Is not applicable, and it is also not applicable to small workpieces that are plated by hanging a large number on a plating jig.

The present invention has been made in view of the above problems, has a simple structure, is small and lightweight, has little wear, and does not contact a gate member when a work passes through the gate. In addition, it is an object of the present invention to provide a liquid level maintenance gate that can achieve the above and further has a small amount of liquid leakage.

[0016]

According to the present invention, a liquid level of a second liquid tank adjacent to a first liquid tank is lower than the liquid level of the first liquid tank or is zero between both liquid tanks. When opening an opening formed in a predetermined height range downward from the upper end in the partition wall of the partition wall, an object is allowed to pass along a transport line that horizontally passes through this opening, and when closed, the first In a liquid level maintaining gate for preventing the liquid from flowing out of the liquid tank to the second liquid tank, a space which is arranged in the opening of the partition wall and accommodates the work therein, and a constant depth from the upper end, and an outer periphery from the space. A bottomed cylindrical member having a work passage cutout that allows the work to enter and leave the space, the work passage cutout opening direction A gate member capable of being converted 180 degrees in two directions along the line, Serial is to achieve the above object by which the seal member for sealing liquid-tightly between the inner peripheral edge of the outer periphery and the opening of the gate member, the provided.

Further, as in claim 2, the bottom wall of the gate member has a double structure, a large number of rectifying pores are formed in the upper bottom wall, and the work passage is formed in the lower bottom wall. The position of the cutout may be changed according to the change of the direction of the opening, so that the fluid in the first liquid tank may be caused to flow into the gate member, or a water supply / drain port for discharging the flowed-in liquid may be provided. .

Further, according to a third aspect of the present invention, the gate member is a bottomed cylindrical member whose center axis is arranged in the vertical direction, and is rotatable about the center axis. Good.

Further, according to a fourth aspect of the present invention, the seal member is parallel to the central axis of the gate member and is provided at two positions on the first liquid tank side on the left and right of the transfer line and on the second liquid tank side. A seal roll, which is arranged in contact with the cylindrical outer periphery of the gate member at two locations so as to be capable of relative displacement around the central axis, and is attached to the inner peripheral edge side of the opening, and the tip edge is the outer periphery of the seal roll. In addition, four seal plates that are in contact with the gate member so as to be relatively displaceable from the opposite side may be provided.

According to a fifth aspect of the invention, the seal roll supports a pipe and the pipe so as to be rotatable, and
The support shaft may be loosely fitted to the inner diameter of the pipe with a play allowance in the radial direction.

Further, according to a sixth aspect of the present invention, the tip edge extends in the vicinity of a vertical tangent line between the seal roll and the outer periphery of the gate member, in contact with the outside of the seal roll on the first liquid tank side. There may be a soft second sealing piece present.

According to a seventh aspect of the invention, a chain is fixed in the circumferential direction on the outer periphery of the cylindrical shape near the upper end of the gate member, and on the partition wall side, the chain is engaged with the chain and the chain is interposed. The gate member and a sprocket wheel that is rotationally driven around the axis may be provided.

Further, the lower bottom wall of the gate member is arranged so as to face the upper surface of at least one liquid tank bottom wall of the first liquid tank and the second liquid tank. In the wall, the water supply / drainage port in the lower bottom wall of the gate member is provided at least in a part of the time from when the work passage notch is closed to the second liquid tank side to when it is opened to the first liquid tank side. , At least a part of the time period between the liquid supply port communicating with the first liquid tank side and the water supply / drain port from when the work passage notch is closed to the first liquid tank side to when it is opened to the second liquid tank side. And a drainage port communicating with the drainage system.

According to a ninth aspect of the present invention, the opening is surrounded on both sides of the conveying line with a gap along the movement locus for converting the opening direction of the work passing notch of the gate member into two directions. A pair of guide walls arranged in
A guide member having a guide bottom wall that contacts the bottom surface of the gate member and movably supports the gate member within a certain range is provided, and both ends of the guide wall in the transport line direction have a gap that allows passage of a work. You may oppose.

The seal member may include a seal piece provided on the guide wall and slidably mounted on the outer periphery of the gate member.

Further, as in claim 11, the gate member may be a bottomed cylindrical member having a central axis arranged vertically, and the gate member may be rotatable around the central axis.

According to a twelfth aspect of the present invention, the gate member is provided with a driven shaft projecting below the bottom wall of the liquid tank at the position of the central axis on the bottom wall of the gate member. You may make it rotate around the said central axis line via.

According to a thirteenth aspect of the present invention, the gate member is a bottomed cylindrical member having a central axis arranged vertically and having a flange at the bottom, and is rotatable about the central axis. The pair of guide members have arcuate inner peripheral surfaces arranged with a slight gap with respect to the outer periphery of the flange, and the seal member is provided on the guide member and has a cylindrical shape of the gate member. It may be configured to include a seal piece slidably mounted on the outer peripheral surface and the upper surface of the flange.

According to a fourteenth aspect of the present invention, the gate member includes an oval bottom wall, and a flexible peripheral wall disposed on the bottom wall so as to be slidable in the circumferential direction on an oval track. The flexible peripheral wall member may be configured to have a work passage width shorter than the entire length of the elliptical orbit.

According to a fifteenth aspect of the present invention, at least a work passage corresponding to the range of the passage path of the work is formed, and an insertion member detachable from above is provided in the space of the gate member. Good.

Further, as in claim 16, a partition wall having a height lower than a bottom side of the opening is provided on the bottom wall of the second liquid tank outside the gate member, and the partition wall is provided. A leaked liquid recovery hole may be provided between the wall and the partition wall.

Still further, according to a seventeenth aspect of the present invention, the height of the partition wall and the leak liquid discharge capacity of the leak recovery hole are set so that the liquid leaking from the first liquid tank when the partition wall is fully opened is controlled by the partition wall. The amount may be discharged without exceeding.

[0033]

According to the first aspect of the present invention, the gate member changes the opening direction of the work passage notch by 180 degrees in the opposite direction of the transfer line while the work is accommodated in the space. Since the sealing member seals the space between the outer periphery of the gate member and the opening of the partition wall in a liquid-tight state, the work can be passed through the gate without contacting the gate member. The amount of liquid leakage at this time is
Since it is equal to the amount of liquid that has entered the space of the gate member, liquid leakage can be suppressed.

According to the second aspect of the present invention, before the liquid flows from the opening of the work passage notch, the liquid in the first liquid tank is made to flow into the gate member from the supply / drain port, and the work passage notch is formed. The change in the suspended state of the work due to the sudden flow of liquid from the opening of the nozzle and the distortion due to the rapid rise in pressure near the gate member are eliminated, and the liquid flowing in from the supply / drain port is able to clear the rectifying pores on the upper bottom wall. By passing, it is possible to prevent turbulence of the liquid flowing into the gate member.

Further, before the opening of the work passage cutout is opened to the second liquid tank side, the liquid in the gate member is discharged from the supply / drain port, so that the work passage cutout opening is opened in the second liquid tank. It is possible to prevent the liquid from suddenly flowing out, disturb the suspended state of the work due to the liquid, and prevent the liquid from scattering.

According to the third aspect of the present invention, since the gate member is a cylindrical member having a bottom, the structure can be simplified and the gate member can be rotated about the central axis while the sealed state is easily maintained.

According to the fourth aspect of the invention, the four seal rolls contacting the outer periphery of the cylindrical gate member at four locations allow the gate member to rotate with less friction while maintaining a good sealing condition. can do.

According to the invention of claim 5, the pipe forming the seal roll is displaced with respect to the cylindrical gate member which is displaced in the radial direction by hydraulic pressure, following the displacement.
A good seal can be maintained.

According to the sixth aspect of the present invention, the soft second seal piece can more reliably maintain the sealed state without hindering the rotation of the gate member.

According to the invention of claim 7, since the chain provided on the cylindrical outer periphery of the gate member is driven by the sprocket wheel, for example, as compared with the case where the driven shaft projects downward from the lower end of the gate member. The seal is easy and the upper end, which is the free end with the bottom wall as the base end, is rotationally driven, so there is little frictional resistance during driving, and the drive force from the sprocket wheel is controlled by the chain. Dispersion in the circumferential direction of the member prevents stress concentration.

According to the eighth aspect of the invention, liquid supply and drainage to the inside of the gate member are performed in accordance with the opening direction of the work passage cutout of the gate member without requiring a special valve or valve control. be able to.

According to the invention of claim 9, the gate member is
Since it is surrounded by the guide member, it is possible to prevent the gate member from tilting due to hydraulic pressure, and when the gate member is about to flow due to strong hydraulic pressure, it contacts the pair of guide walls to prevent the outflow. At the same time, the liquid leakage is prevented.

According to the tenth aspect of the invention, even if the gate member tilts or shifts, the seal piece surely seals between the guide wall and the guide member and liquid leakage can be prevented. .

According to the invention of claim 11, since the gate member is a bottomed cylindrical member, its structure is simple, and even if it is rotated around its central axis, the sealed state can be easily maintained. You can

According to the twelfth aspect of the invention, since the driven shaft integral with the gate member of the gate member is arranged so as to project below the bottom wall of the liquid tank, the drive device should be arranged below the liquid tank. Thus, the gate member can be easily driven.

According to the thirteenth aspect of the invention, since the sealing piece is slidably mounted on the cylindrical outer peripheral surface and the upper surface of the flange of the bottomed cylindrical gate member having the flange on the lower stage, one The sealing piece can seal the outer periphery and bottom of the gate member.

According to the fourteenth aspect of the present invention, the gate member is provided with the flexible peripheral wall member that slides in the circumferential direction of the elliptical orbit. It is also possible to process workpieces that are long in the direction of the transfer line.

According to the fifteenth aspect of the present invention, the inner space of the gate member is filled with the insertion member without hindering the passage of the work. Only the volume can be reduced.

According to the sixteenth aspect of the present invention, the leaked liquid generated when the gate member is opened and closed can be collected without leaking to another liquid tank.

According to the seventeenth aspect of the invention, even if the gate member is destroyed and a large amount of liquid in the first liquid tank flows out from the opening, it is leaked to another liquid tank. Can be collected without.

[0051]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the liquid level maintaining gate 10 according to the first embodiment of the present invention is, for example, a first liquid tank 12 which is a plating tank and an outlet reserve tank in a plating line (described later). The transfer line 20 is provided on the partition wall 16 between the second liquid tanks 14 and opens and closes the opening 18 of the partition wall 16. When opened, the transfer line 20 runs horizontally through the opening 18.
The work 22 is allowed to pass along and is prevented from flowing out of the liquid 24 from the first liquid tank 12 to the second liquid tank 14 when closed.

Here, the liquid level of the liquid 24 in the first liquid tank is made slightly lower than the upper end of the partition wall 16, and the second liquid tank 1
The liquid level in 4 is set to be much smaller than the liquid level of the liquid 24 in the first liquid tank 12 or to be zero.

The liquid level maintaining gate 10 has the opening 18
Is a bottomed cylindrical member having a central axis arranged vertically in the central part and having a flange 26 at the bottom, the gate member 28 being rotatable before the central axis, and the outer periphery of the flange 26. To the gate member 28 on the transfer line 20 from both sides thereof, which is provided with an arcuate inner peripheral surface 30A arranged concentrically with the cylindrical outer peripheral surface of the gate member 28. A guide member 34 including a pair of guide walls 30 arranged so as to surround with a gap, and a guide bottom wall 32 that comes into contact with the bottom surface of the gate member 28 and rotatably supports it, and the guide member 34. And a sealing member 36 that liquid-tightly seals the gate member 28.

The structures of the gate member 28, the guide member 34, and the seal member 36 are shown enlarged in FIG.

The partition wall 16 has a double structure, and a support wall 30B integrally supporting the guide wall 30 is dropped from above into the slit 16A between the partition walls 16 of the double structure. It is adapted to be tightened and fixed to the partition wall 16 by a bolt 30C. Here, the opening 18 is the first
It is formed from the upper end of the partition 16 so as to reach the common bottom wall 13 of the liquid tank 12 and the second liquid tank 14.

The gate member 28 has a work passage cutout 38 extending from the upper end to the lower end flange 26 at one position in the circumferential direction. The width of the work passage cutout 38 is slightly larger than the width of the work 22 that advances along the transport line 20. In addition, the gap 30D between both ends of the pair of guide walls 30 in the direction of the transfer line 20 is also formed by the work passage notch 38
Is set to be approximately equal to.

The support wall 30B is integrally connected to the guide wall 30 on the side opposite to the arcuate inner peripheral surface 30A in the direction normal to the arc.

The gate member 28 is provided with a driven shaft 28A penetrating the guide bottom wall 32 at the center position of its bottom wall, and a bevel gear 40 attached to the tip (lower end) of this driven shaft 28A is attached to the drive shaft. By engaging with a bevel gear 44 attached to the shaft 42, the bevel gear 44 is rotationally driven by the drive shaft 42.

The seal member 36 is attached in the vertical direction along the ends of the pair of guide walls 30 on the first liquid tank 12 side, and the tip ends thereof are the cylindrical outer peripheral surface of the gate member 28 and the flange. It is composed of a flexible sealing piece made of rubber or the like that contacts the upper surface 26A of 26.

As shown in FIG. 2, the second liquid tank 14
A partition wall 46 having a low height is provided on the bottom wall 13 adjacent to the outlet (gap 30D) side of the liquid level maintaining gate 10 on the second liquid tank 14 side. A leaked liquid recovery hole 48 is formed in the bottom wall 13 of the second liquid tank 14 at a position between the partition wall 46 and the partition wall 16.

The leaked liquid recovery hole 48 is provided in the first liquid tank 1
The liquid which has been communicated with the reserve tank 50 disposed on the lower side of 2 and which has leaked from the first liquid tank 12 through the opening 18 can be returned to the reserve tank 50.

The liquid level maintaining gate 10 is provided, for example, in a continuous processing liquid tank line 52 as shown in FIG.
It is arranged on a partition wall between the tanks, and is rotationally driven by a single drive shaft 42 passing below each liquid tank via a bevel gear as in the case shown in FIG. Reference numeral 54 in FIG. 2 denotes a motor, and 56 denotes an electromagnetic clutch for turning on / off the engagement of the level gear 44 and the drive shaft 42 in the rotational direction. Reference numeral 58 denotes a control device for controlling the electromagnetic latch 56 on / off according to a program.

The work 22 is the processing liquid tank line 5
It is hung and supported by a rack of the carrier device 60 arranged above 2 via a plating jig 62. Plating jig 6
2 is hooked and supported by a bracket 60B which is integral with the rack 60A.

The transfer device 60 rotates in a horizontal plane outside both ends of the processing liquid tank line 52, for example, a chain 64A.
It is composed of a sprocket wheel 64B.

Here, the transfer device 60 transfers the plurality of works 22 attached to the plating jig 62 along the transfer line 20 from the upper right direction to the lower left direction in FIG. The hanging height is the first liquid tank 1
It is arranged to be below the liquid surface of the liquid 24 in 2.

The plurality of liquid tanks along the transfer line 20 are
For example, in the case of plating treatment, the washing tank 66,
First buffer tank 68, plating layer (first liquid tank 12), second
The buffer layer (second liquid tank 14) and the recovery tank 70 are arranged in this order. The pretreatment system upstream of the washing tank 66 and the posttreatment system downstream of the recovery tank 70 are not shown.

The liquid level maintaining gate is the inlet side wall 6 of the washing tank 66.
6A, partition wall 6 between the washing tank 66 and the first buffer tank 68
7, the first buffer 68 and the partition 69 of the first liquid tank 12, the first
The partition walls 16 between the liquid tank 12 and the second liquid tank 14 which is the second buffer layer, the partition walls 15 of the second liquid tank 14 and the recovery tank 70, and the partition wall 71 on the outlet side of the recovery tank 70 are respectively denoted by reference numerals 101 to 10.
They are arranged as indicated by 3, 10, 104 and 105.

Next, the plating jig 6 is moved by the transfer device 60.
A process of processing the work 22 suspended via the liquid tanks 2 through the respective liquid tanks will be described.

In this case, the transfer device 60 transfers the work 22 along the transfer line 20 at a constant speed. On the other hand, each liquid level maintenance gate has the gate member 28 when the work 22 approaches. However, when the work 22 is allowed to enter the inner space 29 through the work passing notch 38 and the work 22 is about to exit from the space 29, the work passing notch 38 is moved in the traveling direction of the work 22. The rotation is controlled so as to point.

For example, as shown in FIG. 3 (A), when the work 22 approaches, the gate member 28 has its work passing cutout 38 rotated rightward in the drawing,
The work 22 traveling on the transfer line 20 enters the space 29 inside the gate member 28 from the work passing notch 38.

While the work 22 is moving on the transfer line 20 in the space 29 inside the gate member 28, the gate member 28 is rotated around its central axis, and the gate member 28 is rotated as shown in FIG.
As shown in (B), the work passage notch 38 is positioned rightward. Therefore, the work 22 comes out of the gate member 28 through the work passage notch 38. After the work 22 is pulled out, the gate member 28 is further rotated, and as shown in FIG. 3A, the next work 22 is ready to be received.

In the above process, the seal member 36 attached to the guide wall 30 is always in contact with the cylindrical outer peripheral surface of the gate member 28 and the upper surface 26A of the flange 26 at the lower end thereof, and is located on the high liquid surface side. Since it is pressed against the gate member 28 by the liquid pressure from the liquid tank, liquid leakage can be suppressed well.

However, the liquid that has entered the gate member 28 is discharged (leaked) into the liquid tank on the lower side of the liquid with each rotation of the gate member 28 by the rotation of the gate member 28. Become.

Since this leaked liquid is blocked by the partition wall 46, it does not leak to other parts. Further, it is quickly returned to the reserve tank 50 through the leaked liquid recovery hole 48.

In FIG. 1, reference numeral 72 is a jet hole for the plating solution arranged on the bottom surface of the first liquid tank 12, and 74 is the first liquid tank 1.
2 is an overflow hole provided in the side wall, and 76 is a plating bath overflowing from the overflow hole 74 to the reserve tank 50.
Shows a return pipe for returning to.

The plating solution returned to the reserve tank 50 from the return pipe 76 and the leaked liquid recovery hole 48 is jetted again into the first liquid tank 12 from the jet hole 72 by a pump (not shown). Reference numeral 78 in FIG. 1 is a first plating bath
The exhaust hood for preventing the odor emission of the chemical liquid from the liquid tank 12 is shown.

As described above, the work 22 transported by the transport device 60 via the plating jig 62 is the washing tank 6
6, first buffer layer 68, first liquid tank 12, second liquid tank 14
And the recovery tank 70, liquid level maintenance gates 101-103, 1
After going through 0, 104 and 105, the plating process is completed.

In this embodiment, the respective liquid level maintaining gates are arranged below the respective liquid tanks along the transport line 20 with respect to the drive shaft 42 which is longitudinally arranged, via bevel gears 44 and 45. Although driven, the bevel gear 44 is turned on / off with respect to the drive shaft 42 by the electromagnetic clutch 56 whose on / off is controlled by the control device 58, so that the work 22 is moved according to the traveling speed and the pitch of the work 22 by the transfer device 60. The position of the passage cutout 38 is changed.

Next, the liquid level maintaining gate 80 according to the second embodiment of the present invention shown in FIG. 4 will be described.

The liquid level maintaining gate 80 is used for the work 2
The insert member 82 in which the work passage 82A corresponding to the passing locus range including the plating jig 62 is formed.

The insertion member 82 is the gate member 28.
It is removably inserted into the inner space 29 from above (however, not in contact with the gate member 28), and fills the space 29 except the work passage locus range.

In the case of this embodiment, the amount of liquid leakage of the gate member 28 when the work 22 goes in and out can be reduced by the volume of the insertion member 82.

The work passage 82A of the insertion member 82
It is advisable to prepare a plurality of types having different passage sectional areas depending on the sizes of the workpiece 22 and the plating jig 62 passing therethrough.

Next, a third embodiment of the present invention shown in FIG. 5 will be described.

In the third embodiment, the gate member 86 is composed of an elliptical bottom wall 86A and, for example, a bellows-shaped member disposed on the bottom wall 86A so as to be slidable along an elliptical track in the circumferential direction. And a flexible peripheral wall member 86 </ b> B, which is shorter than the entire length of the elliptical track by a work passage width, where the work passage notch 88 is provided. It is supposed to be. In this example,
It is possible to pass a long work in the direction of the transfer line 20.

Next, a fourth embodiment of the present invention shown in FIGS. 6 to 8 will be described.

Liquid level maintaining gate 90 according to the fourth embodiment.
Is a rectangular parallelepiped assembly provided with a bottomed cylindrical gate member 92. The bottom wall of the gate member 92 has a double structure, a large number of flow straightening holes 94A are formed in the upper bottom wall 94, and the opening direction of the work passage notch 98 is changed in the lower bottom wall 96. And the position is changed, whereby the liquid in the first liquid tank 12 is made to flow into the gate member 92, or the liquid supply / drain port 1 for discharging the liquid that has flowed in is discharged.
It is equipped with 00.

An annular spacer 95 is arranged between the upper bottom wall 94 and the lower bottom wall 96 to form a space into which the liquid flows between the upper bottom wall 94 and the lower bottom wall 96. .
An abrasion resistant resin sheet 97 such as PVDF is attached to the lower side of the lower bottom wall 96.

The cylindrical gate member 92 is rotatable about its central axis and is rotatably sealed by seal members 110 at four positions in its circumferential direction.

The four sealing members 110 are respectively provided on the outer periphery of the gate member 92 in a cylindrical shape.
Parallel to the center axis of rotation of, in the entire height range of the cylindrical outer circumference,
A seal roll 112, which is disposed in contact with the cylinder roll so as to be relatively displaceable in the circumferential direction, is attached to the inner peripheral edge side of the opening 18, and a tip edge 114A seals the outer periphery of the seal roll 112 from the side opposite to the gate member 92. The roll 112 is provided with four seal plates 114 that contact each other so as to be capable of relative displacement over the entire height range.

The seal roll is composed of a pipe 112A made of abrasion-resistant resin such as PVDF, and the pipe 11A.
2A is composed of a pair of upper and lower support shafts 112B loosely fitted with a play allowance in the radial direction near the upper end and the lower end.

A chain 116 is circumferentially fixed to the outer periphery of the cylindrical shape near the upper end of the gate member 92,
On the partition wall 16 side, a sprocket wheel 11 that meshes with the chain 116 and drives the gate member 92 to rotate about the central axis line through the chain 116.
8 are provided.

The chain 11 of the gate member 92.
6 at a height position facing the outer periphery of the lower position of the gate member 92 from both sides of the transfer line 20 with a slight gap.
A pair of arc-shaped guide members 120 facing each other are arranged so as to sandwich the outer circumference of the cylinder. The sprocket wheel 118 is rotatably supported by the arc-shaped guide member 120.

On the lower side of the gate member 92, the assembly bottom wall 122 supporting the lower bottom wall 96, the liquid supply port 1
24 and a drain port 126 are provided. The liquid supply port 124 and the liquid discharge port 126 are positioned so as to overlap the liquid tank liquid supply port 125 and the liquid tank drainage port 127 formed on the liquid tank bottom wall 123 below them.

The liquid supply port 124 is the gate member 92.
Of the work passage notch 98 overlaps the water supply / drainage port 100 in the up-down direction during a part of the time from when the work passage notch 98 is closed to the second liquid tank side to when it is opened to the first liquid tank side. The liquid inside is made to flow into the gate member 92 through the liquid supply ports 125 and 124, the water supply / drainage port 100, and the inner space of the spacer 95 and from the rectifying pores 94A of the upper bottom wall 94.

At this time, the liquid slowly flows into the gate member 92 through the flow regulating pores 94A, so that the turbulent flow of the liquid in the gate member 92 is suppressed.

Reference numeral 128 in FIG. 8 indicates the liquid supply port 12.
5 is a communication pipe for communicating with the communication hole 129 on the bottom surface of the first liquid tank, and 130 is a discharge pipe for discharging the liquid from the liquid discharge port 127 to the outside.

Reference numeral 132 in the figure denotes the seal plate 11
4 shows a vertical engaging projection formed by projecting a tip on the side opposite to the seal roll 112. This engaging protrusion 132
Is inserted into and engaged with the vertical engagement groove 134 formed inside the liquid tank side wall 133 from above, so that the liquid level maintaining gate 90 of this embodiment can be attached and detached as one assembly. Has been done.

In this embodiment, the gate member 90 is provided before the work passage notch 98 is opened to the first liquid tank 12 side.
The water supply / drain port 100 formed on the lower bottom wall 96 of the first liquid tank 1 overlaps with the liquid supply ports 124 and 125.
The liquid in 2 is the communication pipe 128, the liquid supply port 125,
It is introduced into the gate member 92 through 124, the water supply / drainage port 100, and the rectifying pores 94A.

Therefore, the liquid is injected into the gate member 92 before the liquid in the first liquid tank 12 suddenly flows in from the work passage notch 98, and the turbulent flow is generated by the rapid inflow of liquid. Therefore, the pressure in the gate member 92 does not rise sharply, and the work 22 trying to enter the gate member 92 from the work passage notch 98 does not drop due to the liquid flow.

Before the gate member 92 is further rotated and the work passage cutout 98 is opened to the second liquid tank 14 side, the water supply / drainage port 100 is communicated with the liquid discharge ports 126 and 127, and the discharge pipe 130 is connected. From, the liquid in the gate member 92 is discharged.

At this time, the gate member 92 seals with the seal member 110 so that the liquid on the first liquid tank 12 side does not enter.

When the work passage notch 38 is opened to the second liquid tank 14 side, most of the liquid in the gate member 92 has been discharged, so the liquid suddenly flows out to the second liquid tank 14 side and scatters. There is nothing to do.

A small amount of leaked liquid or a liquid dripping from the work is recovered from the leaked liquid recovery port 48.

In the above process, the gate member 92 is
Although it deviates from its central axis due to hydraulic pressure, the seal roll 1
Since the pipe 112A constituting 12 is loosely fitted to the support shaft 112B, the seal can be maintained by hydraulically following the displacement of the gate member 92 in the radial direction.

Further, since the pipe 112A is made of a wear resistant resin, when the cylindrical gate member 92 rotates, it does not hinder the rotation regardless of whether it makes rolling contact or sliding contact with the cylindrical gate member 92. Can be maintained.

In the above embodiment, as shown in FIG. 9, the leading edge 136A is provided outside the seal roll 112 on the side of the first liquid tank 12 so that the seal roll 112 and the circumferential surface of the gate member 92 are formed. By providing the second sealing piece 136 that reaches the vicinity of the contact line, the sealing can be further improved, and even if a gap is generated between the gate member 92 and the sealing roll 112, the second sealing is performed. The piece 136 allows the seal to be maintained. This second seal piece 1
36 may be composed of, for example, a vinyl chloride sheet or a half-divided vinyl chloride pipe.

Further, in the above-described embodiment, as shown by a two-dot chain line in FIG. 6, the lower end portion of the work passage notch 98 is provided at a constant height range at the outer peripheral position of the upper bottom wall 94 of the gate member 92. When the rising portion 138 is provided so as to cover, the amount of liquid leakage when the work passage notch 98 is opened to the second liquid tank 14 side can be reduced.

Incidentally, the gate members 28 and 92 of the above embodiment.
Has a bottomed cylindrical shape, and the gate member 86 is composed of a flexible peripheral wall member 86B. However, the present invention is not limited to this, and, if necessary, a space between the gate member 86 and the opening 18 side. While the sealed state is maintained, the work 22 conveyed on the conveyance line 20 is received, and the direction of the work passage notch 98 is changed by 180 degrees on the conveyance line 20 while the work 22 is present inside thereof. Anything can be used.

Therefore, for example, the shape may be an elliptic cylinder shape.

Further, when the gate member is a cylindrical body having a work passing cutout, the rotation may be unidirectional or reciprocal rotation. However, in the case of the embodiments of FIGS. 6 to 8, since the chain 116 is not continuous at the portion of the work passage notch 98, it is necessary to provide the sprocket wheels at two or more places when rotating in one direction.

[Brief description of drawings]

FIG. 1 is a perspective view showing a processing liquid tank line using a liquid level maintaining gate according to the present invention.

FIG. 2 is an exploded perspective view showing an enlarged liquid level maintaining gate of the same embodiment.

FIG. 3 is a schematic plan view showing a relationship between a liquid level maintaining gate and a work according to the embodiment.

FIG. 4 is a perspective view showing a liquid level maintaining gate according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a liquid level maintenance gate according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing a liquid level maintenance gate according to a fourth embodiment of the present invention.

FIG. 7 is an exploded perspective view of the gate member of the embodiment.

FIG. 8 is a perspective view showing a part of the liquid tank of the same embodiment.

FIG. 9 is a plan view showing another embodiment of the seal member of the same embodiment.

[Explanation of symbols]

10, 80, 101-103, 10, 104, 105 ...
Liquid level maintaining gate 12 ... First liquid tank 13 ... Bottom wall 14 ... Second liquid tank 15, 16, 67, 69, 71 ... Partition wall 18 ... Opening 20 ... Conveying line 21 ... Object 22 ... Work piece 24 ... Liquid 26 ... Flange 26A ... Top surface 28 ... Gate member 28A ... Driven shaft 29 ... Space 30 ... Guide wall 30A ... Arc-shaped inner peripheral surface 32 ... Guide bottom wall 34 ... Guide member 36 ... Seal member 38 ... Work passing notch 42 ... Drive shaft 46 ... Partition wall 48 ... Leakage liquid recovery hole 50 ... Reserve tank 52 ... Treatment liquid tank line 60 ... Transfer device 62 ... Plating jig 66 ... Rinsing tank 68 ... First buffer tank 70 ... Recovery tank 90 ... Liquid level maintaining gate 92 ... Gate Member 94 ... Upper bottom wall 94A ... Straightening pore 96 ... Lower bottom wall 98 ... Work passing notch 100 ... Water supply / drainage port 110 ... Seal member 112 ... Seal roll 112A ... Ip 112B ... Support shaft 114 ... Seal plate 114A ... Tip edge 116 ... Chain 118 ... Sprocket wheel 122 ... Liquid tank bottom wall 124 ... Liquid supply port 126 ... Drain port 128 ... Communication pipe 130 ... Drain pipe 136 ... Second seal Piece

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[Procedure amendment]

[Submission date] June 27, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Correction target item name] Figure 9

[Correction method] Change

[Correction content]

[Figure 9]

Claims (17)

[Claims] 1. A partition between the two liquid tanks, in which the liquid level of a second liquid tank adjacent to the first liquid tank is lower or zero than the liquid level of the first liquid tank, the partition wall When an opening formed in a certain height range downward from the upper end is opened, an object is allowed to pass along a transfer line that horizontally passes through this opening, and when closed, from the first liquid tank to the second liquid tank. In the liquid level maintaining gate for preventing the liquid from flowing out, the space is disposed in the opening of the partition wall, the space for accommodating the work therein, and a constant depth from the upper end,
A cylindrical member having an open upper end, which is formed from the space to one point on the outer periphery and has a work passage cutout that allows a work to enter and leave the space, and the opening direction of the work passage cutout. Is provided with a gate member capable of being converted by 180 degrees in two directions along the transport line, and a seal member that liquid-tightly seals between the outer periphery of the gate member and the inner peripheral edge of the opening. Characteristic liquid level maintenance gate. 2. The gate member according to claim 1, wherein the bottom wall of the gate member has a double structure, a large number of rectifying pores are formed in the upper bottom wall, and the work passage cutout is formed in the lower bottom wall. The position is changed in accordance with the change of the direction of the opening of the opening, and thereby, the fluid in the first liquid tank is made to flow into the gate member, or a water supply / drain port for discharging the inflowing liquid is provided. Liquid level maintenance gate. 3. The gate member according to claim 1 or 2, wherein the gate member is a bottomed cylindrical member having a central axis arranged vertically, and the gate member is rotatable about the central axis. Liquid level maintenance gate. 4. The seal member according to claim 3, wherein the seal member is parallel to the central axis of the gate member and is located at two positions on the first liquid tank side and the second liquid tank side on the left and right of the transfer line. At the cylindrical outer periphery of the gate member, a seal roll disposed in contact with the center axis about the center axis to be relatively displaceable, and is attached to the inner peripheral edge side of the opening, and the tip edge is on the outer periphery of the seal roll. A liquid level maintaining gate, comprising: four sealing plates that come into contact with the gate member so as to be relatively displaceable from the opposite side. 5. The seal roll according to claim 4,
Liquid level maintenance, comprising: a pipe; and a support shaft that rotatably supports the pipe and that is loosely fitted to the inner diameter of the pipe with a play allowance in the radial direction. Gate. 6. The method according to claim 4 or 5, wherein the leading edge extends in the vicinity of a vertical tangent line between the seal roll and the outer periphery of the gate member in contact with the outside of the seal roll on the side of the first liquid tank. A liquid level maintenance gate, characterized in that a soft second sealing piece is provided. 7. The chain according to any one of claims 3 to 6, wherein a chain is circumferentially fixed to the outer periphery of the cylindrical shape near the upper end of the gate member, and meshes with the chain on the partition wall side. A liquid level maintaining gate, wherein the gate member and a sprocket wheel that is rotationally driven around the axis are provided via a chain. 8. The lower bottom wall of the gate member according to claim 1, wherein the lower bottom wall of the gate member is arranged to face an upper surface of at least one of the first liquid tank and the second liquid tank. , The bottom wall has at least a part of the water supply / drainage port in the lower bottom wall of the gate member between the time when the work passage cutout is closed to the second liquid tank side and the time when the work passage cutout is opened to the first liquid tank side. At the time of
The liquid supply port communicating with the first liquid tank side and the water supply / drainage port are provided at least in a part of the time from when the work passage notch is closed to the first liquid tank side to when it is opened to the second liquid tank side. A liquid level maintaining gate, which is provided with a drain port that communicates with a drain system. 9. The opening according to claim 1, wherein the opening is surrounded from both sides of the transfer line with a gap along the movement locus for converting the opening direction of the work passing notch of the gate member into two directions. A pair of guide walls arranged in
A guide member having a guide bottom wall that contacts the bottom surface of the gate member and movably supports the gate member within a certain range is provided, and both ends of the guide wall in the transport line direction have a gap that allows passage of a work. A liquid level maintenance gate characterized by being opposed to each other. 10. The seal member according to claim 9,
A liquid level maintaining gate comprising a seal piece provided on the guide wall and slidably mounted on an outer periphery of the gate member. 11. The gate member according to claim 9 or 10, wherein the gate member is a bottomed cylindrical member having a central axis arranged vertically, and is rotatable about the central axis. Liquid level maintenance gate. 12. The gate member according to claim 11, wherein the gate member is provided with a driven shaft projecting below the bottom wall of the liquid tank at a position of the central axis on a bottom wall of the gate member. A liquid level maintenance gate which is rotated around the central axis. 13. The gate member according to claim 9,
A centered cylindrical member with its central axis arranged in the vertical direction and having a flange at the bottom, which is rotatable about the central axis, and the pair of guide members are provided with respect to the outer circumference of the flange. The seal member includes an arc-shaped inner peripheral surface arranged with a slight gap, and the seal member includes a seal piece provided on the guide member and slidably mounted on the cylindrical outer peripheral surface of the gate member and the upper surface of the flange. A liquid level maintenance gate, which is characterized in that 14. The gate member according to claim 1,
An elliptical bottom wall, and a flexible peripheral wall member disposed on the bottom wall so as to be slidable in the circumferential direction on an oval orbit, the flexible peripheral wall member comprising A liquid level maintenance gate that is shorter than the entire length of the elliptical orbit by the width of the work passage. 15. The method according to any one of claims 1 to 14,
At least a work passage corresponding to the range of the passage path of the work is formed, and has a size that substantially fills the space in the gate member, and an insertion member that is detachable from above is provided in the space. Liquid level maintenance gate. 16. The method according to any one of claims 1 to 15,
A partition wall having a height lower than the bottom of the opening is erected on the bottom wall of the second liquid tank outside the gate member, and the leak liquid recovery hole is provided between the partition wall and the partition wall. A liquid level maintenance gate characterized by being provided with. 17. The height of the partition wall and the leak liquid discharge capacity of the leak recovery hole are set such that the liquid leaking from the first liquid tank exceeds the partition wall when the partition wall is fully opened. A liquid level maintenance gate, which is characterized in that it is discharged to the end.