JPH0925590A - Spray type metallic surface treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray type surface treating device with which the improvement in metallic surface treating efficiency and the reduction in the size of the device are made possible by directly filtering the treating liquid ejected from a spray. SOLUTION: A filter device 2 is composed of a buffer distributing material 4 which is arranged between a recovering means 105 and a storage tank 104, relieves the kinetic force by the flow of the treating liquid flowing from this recovering means 105 to the storage tank 104 and distributes the liquid in multiple directions, a band- shaped filter medium 5 which receives the treating liquid distributed in the multiple directions, removes impurities from this treating liquid and discharges the liquid to the storage tank 104 and a transfer means which continuously transfers the band-shaped filter medium 5 to the lower part of the buffer distributing material. The band-shaped filter material 5 is formed to a recessed shape in section having the base part 5A covering the storage tank 104 and flank parts 5B, 5C extending to expand the spacing between each toward the buffer distributing material 4. A tray-shaped reservoir is formed of inclined flank parts 5D, 5E and the recessed shape in section. In addition, the recessed shape in section is held by pressing the shape with a retaining mechanism 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for removing dust, iron powder, etc. generated when surface-treating a metal-worked product in the process of transporting the metal-worked product in a factory. The present invention relates to a spray-type metal surface treatment device having a filtration device.

[0002]

2. Description of the Related Art A conventional spray type metal surface treatment apparatus is
As shown in FIG. 3, it is composed of a spray for spraying the metal surface treatment liquid, a filter for the treatment liquid contaminated by dust and other impurities on the metal surface in the treatment process, and a means for connecting them. There is something like this. Less than,
This will be described with reference to FIG. In FIG. 3, reference numeral 100 denotes a spray type surface treatment apparatus, which is a conveyor 1 of a manufacturing line.
Metal processed parts 102 (product) conveyed by 01
A plurality of spray nozzles 103, 103, 103, ...
, And the spray nozzles 103, 103, 103, ...
The box-shaped spray chamber 105 having a rectangular cross section that collects the processing liquid injected in step S1 and flows into the storage tank 104, the filtering device 106 that removes impurities from the processing liquid, and the storage tank 104.
And a supply pump 107 for sucking the processing liquid from the main part.

Each spray nozzle 103, 103, 10
The components 3, ... Are arranged so as to sandwich the processed component 102, and are connected to the storage tank 104 via the supply pipeline 108, and are sucked by the supply pump 107 provided in the supply pipeline 108. The treated liquid is jetted to the processed parts 102 conveyed by the conveyor 101. The impurities and the processing liquid are collected in the spray chamber 105 arranged so as to cover the spray nozzles 103, 103, 103, ... And opened to the bottom 105A of the spray chamber 105 to store the storage tank 1.
The processing liquid is made to flow out to the storage tank 104 through the recovery pipe 109 communicating with 04, the processing liquid is sucked again by the supply pump 107, and is sequentially reused.

Further, if the treatment liquid is continuously reused, the impurities mixed in the treatment liquid are increased and the removal efficiency thereof is lowered, and the impurities of the machined parts 102 cannot be efficiently removed. Circulation line 110 of tank 104
A filter device 106 for removing impurities mixed in the treatment liquid is arranged in the above. The filtering device 106 sucks a processing liquid containing impurities from the storage tank 104 and circulates the processing liquid in the circulation conduit 110, and the suction pump 11
2 and the filter 113 arranged in the circulation line 110 between the storage tanks 104. After removing impurities from the processing liquid sucked by the suction pump 112 by the filter 113, the circulation line 110 Through the storage tank 104.

[0005]

However, in the conventional spray type metal surface treatment apparatus, since the filtration apparatus for removing the impurities mixed in the treatment liquid is provided in the circulation pipe line extending from the storage tank, Since it is necessary to separately provide a circulation line, the device itself becomes larger and
When the treatment liquid containing impurities is removed by the filtration device through the circulation path, the removal time becomes long and the efficiency of removing the impurities deteriorates.

Further, in the conventional spray type metal surface treatment apparatus, since the treatment liquid from which impurities have been removed by the filtering device is returned to the storage tank again, the treatment liquid from which impurities have been removed and the treatment liquid is discharged from the spray chamber. The processing liquid containing impurities that are mixed with each other will exist in the storage tank, and as a result, the processing liquid containing impurities will be injected from the nozzle to the processed parts, thus reducing the surface treatment efficiency. There was a problem.

The present invention has been made in order to solve such a problem. By directly filtering the processing liquid injected from a spray, the efficiency of removing impurities is improved and the size of the apparatus is reduced. An object of the present invention is to provide a spray-type metal surface treatment device that can be used.

[0008]

In order to solve the above-mentioned problems, in the spray type metal surface treatment apparatus of the present invention, in claim 1, a treatment liquid for surface-treating a metal object to be conveyed is jetted. Spray, a collecting means for collecting the processing liquid injected by the spray and flowing it out to a storage tank, a supplying means for supplying the processing liquid from the storage tank to the spray, and a circulation pipe connected to the storage tank. A spray-type metal surface treatment apparatus, which is disposed in a channel and has a filtering device for removing impurities from the treatment liquid, wherein the filtering device is disposed between the collecting means and the storage tank. A buffer distribution material that distributes the processing liquid in multiple directions by relaxing the kinetic force of the processing liquid flowing out from the means to the storage tank, and a processing liquid that is distributed in multiple directions by the buffer distribution material. Concerned The strip-shaped filter material is composed of a strip-shaped filter material that removes the impurities from the treatment liquid and flows out to the storage tank, and a transfer unit that continuously transports the strip-shaped filter material below the buffer distribution material. Is formed in a concave shape in cross section having a bottom surface portion that covers the storage tank and side surface portions that extend from the bottom surface portion toward the buffer distribution material so that the mutual spacing increases, and the lower portion of the buffer distribution material is obliquely above. The dish-shaped reservoir is formed by the inclined side surface portion that enters and obliquely rises upward from the lower portion of the buffer distribution material, and the concave shape in cross section is held by being pressed by the pressing mechanism. There is something.

[0009] In the second aspect, the first aspect has the following features.
The pressing mechanism presses at least the side surface portion of the band-shaped filter to form the dish-shaped reservoir having the concave sectional shape, and holds the dish-shaped reservoir having the concave sectional shape when the belt-shaped filter material is transferred by the transfer means. At the same time, it has a plurality of rollers for guiding the band-shaped filter material without damaging it.

In the third aspect, in addition to the first aspect,
Detection means is provided for detecting the liquid surface water level of the processing liquid from the buffer distribution material received by the dish-shaped reservoir of the band-shaped filter material, and the transfer means is activated when the detection means detects a predetermined liquid surface water level. It operates to transfer a predetermined amount of the band-shaped filter material to the lower portion of the buffer distribution material.

According to the spray type metal surface treatment apparatus of the present invention as described above, in claim 1, since the treatment liquid from the recovery means is relaxed by the buffer distribution material and is distributed in multiple directions, the band-shaped filter is provided. Impurities can be efficiently removed from the treatment liquid in a wide range without the material being damaged by the flow of the treatment liquid. Further, since the band-shaped filter material is held in the concave shape in cross section by the pressing mechanism, the band-shaped filter material has both a function of removing impurities and a function of having a dish-shaped reservoir for storing a predetermined flow rate. Even when the flow rate of the processing liquid is large, it is possible to prevent the processing liquid containing impurities from flowing out to the storage tank side and to flow only the processing liquid into the storage tank. Further, since the transfer means for transferring the band-shaped filter material is provided, a new band-shaped filter material can be easily arranged below the buffer distribution material when the impurity removal of the band-shaped filter material is reduced. As a result, even if the filtering device is disposed between the collecting means and the storage tank, the impurities are removed from the processing liquid in which the impurities collected from the collecting means are mixed, and only the processing liquid flows out to the storage tank. The treatment liquid stored in the storage tank can be a treatment liquid in which no impurities are mixed, the treatment efficiency of the metal-made conveyed object can be improved, and the filtering device is arranged between the collecting means and the storage tank. The device itself can be miniaturized.

According to a second aspect of the present invention, the pressing mechanism presses at least the side surface portion of the band-shaped filter to form a dish-shaped reservoir having a concave cross-section, and the dish-shaped reservoir having a concave cross-section when the transfer means transfers the band-shaped filter material. Since it has a plurality of rollers that guide the belt-shaped filter material without damaging the belt-shaped filter material, it does not damage the belt-shaped filter material when it is transferred.

According to another aspect of the present invention, there is provided detection means for detecting the liquid surface water level of the processing liquid from the buffer distribution material received by the dish-shaped reservoir of the band-shaped filter material, and the detection means detects a predetermined liquid surface water level. Then, the transfer means is operated to transfer a predetermined amount of the band-shaped filter material to the lower part of the buffer distribution material, so that the impurities removed by the band-shaped filter material are accumulated in the dish-shaped reservoir of the band-shaped filter material. By detecting the rise of the surface water level, it is possible to judge whether or not the function of the band-shaped filter material is deteriorated, and based on the judgment, a new band-shaped filter material can be automatically positioned below the buffer distribution material.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A spray type metal surface treatment apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing the overall structure of the spray-type metal surface treatment apparatus of this embodiment, and FIG. 2A is a vertical cross-sectional view showing the structure of a filtration device in the spray-type metal surface treatment apparatus of this embodiment. 2 (b) is a cross-sectional view showing the configuration of the filtering device in the spray-type metal surface treatment device of this embodiment. 1 and 2 of the present embodiment, the same reference numerals as those in FIG. 3 of the prior art have the same configurations, and thus the description thereof will be omitted.

In FIG. 1, the spray-type metal surface treatment apparatus 1 of this embodiment includes a filtering device 2 for removing impurities from a treatment liquid, as in the prior art (shown in FIG. 3).
Instead of arranging it in 10, it is arranged between the spray chamber 105 and the storage tank 104 which are the collecting means.
The configuration of the filtration device 2 in this embodiment will be described based on FIGS. 2 (a) and 2 (b).

2 (a) and 2 (b), the filter device 2 has a storage box body 3 having an internal space A and having a rectangular cross section.
The buffer distribution material 4 and the band-shaped filter material 5, and the winding device 6 serving as a conveying means are mainly configured. The storage box 3 has an inflow port 7 that is open to the inner space A on the upper surface 3A and is connected to the recovery conduit 109 of the spray chamber 105, and an inner space on the lower surface 3B that faces the inflow port 7. Outlet 8 that opens at A and projects into the storage tank 104
And the buffer distribution material 4, and the mesh-shaped non-woven fabric and net at intervals of 20 to 200 μ, and the band-shaped filter material 5 made of paper are arranged in the internal space A. Further, the storage box body 3 is formed with a carry-in port 9 and a carry-out port 10 on both side surface portions 3C and 3D with respect to each other, and the carry-in port 9 and the carry-out port 10 are directed outward from the storage box body 3 respectively. Support members 11 and 12 projecting to the respective sides are provided.

The buffer distribution material 4 is formed of, for example, a metal mesh material having a plurality of meshes, and has a predetermined distance below the inflow port 7 so as to cross the opening 7A of the storage box body 3. It extends in two directions, the longitudinal direction X and the width direction Y. Further, the buffer distribution material 4 is detachably fixed by placing both ends thereof on two brackets 13 and 14 provided in the width direction Y of the storage box body 3.

The strip-shaped filter material 5 enters from the carry-in port 9 of the storage box 3 into the internal space A of the storage box 3 from an inclined side surface portion 5D obliquely from above and between the buffer distribution material 4 and the outflow port 8. The inclined side surface portion 5E is arranged so as to extend obliquely upward from the carry-out exit 10 and the inclined side surface portion 5D is rotatably supported by the supporting member 11 on the carry-in entrance 9 side.
The inclined side surface portion 5E is attached to the winding drum 16 of the winding device 6 which is rotatably supported by the support member 12 on the unloading port 10 side. Reference numeral 17 denotes a drive motor of the winding device 6, which is a pulley 17 fixed to this rotation shaft.
A is connected by an annular transmission belt 18 suspended between A and a pulley 16A fixed to the winding drum 16, and this rotational movement is driven by a drive motor 17 via a pulley 17A-transmission belt 18 and pulley 16A. The belt-shaped filter material 5 from the transport port 9 to the transport port 10 by transmitting the strip-shaped filter material 5 to the take-up drum 16.
The transfer is carried out sequentially and continuously. In addition, the strip-shaped filter material 5 is arranged in such a manner as to be close to the buffer distribution material 4 and cross over the outflow port 8 (to cover the storage tank 3), and the width of the bottom surface portion 5A. The side surfaces 5B and 5C, which are bent from both end sides in the direction Y and extend toward the buffer distribution material 4, are formed in a concave shape in cross section. The side surface portions 5B and 5C extend toward the buffer distribution material 4 side so as to increase the mutual distance, and the side surface portions 5 are formed.
The ends of B and 5C are located outside the both ends of the buffer material 4 in the width direction Y.

Reference numeral 20 denotes a pressing mechanism, which is a belt-shaped filter 5.
Side roller having a function of pressing the bottom surface portion 5A and the side surface portions 5B and 5C to hold the concave shape of the cross section and a function of guiding the belt-shaped filter material 5 without damaging the belt-shaped filter material 5 during transfer. 21, 22 and bottom roller 2
3 is comprised. The rollers 21 to 23 are rotatably supported by rackets 26 to 28 extending from the beam members 24 and 25 provided on the carry-in port 9 side and the carry-out port 10 side of the storage box 2 to the band-shaped filter 5 side, respectively. Has been done. The side rollers 21 and 21 of the beam members 24 and 25 move the side surface portion 5B of the band-shaped filter material 5 to the side rollers 22 and 2, respectively.
Reference numeral 2 presses the side surface portion 5C of the band-shaped filter material 5, and each bottom surface roller 23, 23 presses the bottom surface portion 5A of the band-shaped filter material 5. As a result, the band-shaped filter material 5 is formed with a dish-shaped reservoir B capable of retaining a predetermined flow rate of the processing liquid on each of the surface portions 5A to 5F. Reference numeral 30 denotes a strip-shaped filter material 5 arranged in the internal space A from the upper surface 3A of the storage box 3.
Is a liquid level water level detector (detection means) for detecting the liquid level water level of the treatment liquid received by the control liquid, and is connected to the controller 35.
The controller 35 transmits / receives the liquid level signal a detected by the liquid level water level detector 30 to drive / drive the drive motor 17 of the winding device 6.
It controls the stop.

The spray type metal surface treatment apparatus 1 in this embodiment is constructed as described above. Next, the impurity removing operation of the surface treatment apparatus 1 will be described. The supply pump 107 is operated to suck the processing liquid from the storage tank 104, and the sprays 103, 10 are supplied through the supply pipe 108.
The treatment liquid is supplied to 3, 103, .... And, from each spray 103, 103, 103, ... Conveyor 1
The processing liquid is jetted onto the processing member 102 conveyed by 01,
The surface of the processed part 102 is treated, and at this time, the impurities adhered to the surface of the processed part 102 are mixed into the processing liquid, and the processing liquid sprayed from the sprays 103, 103, 103, ... With the impurities, the spray chamber 105
And is flowed into the internal space A of the filtering device 2 through the inflow port 8 through the recovery pipe 109.

When the treatment liquid containing impurities is introduced into the filtration device 2, first, the treatment liquid collides with the buffer distribution material 4 which is a wire mesh material having a plurality of meshes, and the flow kinetic force resulting from the flow velocity thereof is generated. Are alleviated and are distributed in multiple directions (longitudinal direction X and width direction Y of the storage box body 2) so as to propagate along the mesh of the buffer distribution material 4, and the band-shaped filter material 5 is distributed from the entire area of the buffer distribution material 4. Flow toward the side at a low flow rate or drop in units of water droplets, so that the processing solution containing impurities can be treated without damaging the strip-shaped filter material 5 with the processing solution.
Will be received at. When the treatment liquid containing impurities passes through the filter material 5, the strip-shaped filter material 5
The impurities are removed in the processing member 10 and only the processing liquid is flown out to the storage tank 104, and again sucked by the supply pump 107 to be processed into the processing member 10.
2 is injected. At this time, each roller 2 of the pressing mechanism 20
1 to 23, the bottom surface portion 5A of the band-shaped filter material 5, each side surface portion 5
B and 5C are pressed and held in a concave shape in cross section, and the band-shaped filter material 5 has a dish-shaped reservoir B for storing a predetermined amount of treatment liquid.
Even if the flow rate of the processing liquid flowing into the filtering device 2 from the recovery pipeline 109 increases, the processing liquid overflowing from the band-shaped filter material 5 and containing the impurities does not flow out into the storage tank 104, and the impurities are completely removed. It can be removed from the treatment liquid and allowed to flow into the storage tank 3.

Further, the recovery conduit 109 of the spray chamber 105
When the processing liquid containing impurities from the filter device 2 flows into the filtering device 2, the liquid surface detector 30 continues to detect the liquid surface water level of the processing liquid stored in the dish-shaped reservoir B of the strip-shaped filter material 5, and the liquid surface signal a is sent to the controller 35, and the controller 35 is provided on the condition that the liquid level signal a becomes equal to or higher than a predetermined value (the liquid level of the treatment liquid of the band-shaped filter material 5 rises to a predetermined value). The drive motor 17 of the winding device 6 is driven. That is, when the function of removing the impurities of the band-shaped filter material 5 is lowered and the impurities are accumulated (stacked) in the dish-shaped reservoir B of the band-shaped filter material 5, the flow rate of the processing liquid passing through the band-shaped filter material 5 is increased. Also, since the amount of the processing liquid stored in the strip-shaped filter material 5 increases and the liquid level rises, the liquid level detector 30 sequentially detects the increase in the liquid level and detects the liquid level signal. It is sent to the controller 35 as a.

Then, it is judged that the removal function of the band-shaped filter material 5 is deteriorated on condition that the liquid level signal a sequentially sent from the liquid level water level detector 30 becomes a predetermined value, and the controller 35 causes the drive motor 17 to operate. The drive signal b is transmitted. Drive motor 1
When 7 receives the drive signal b, it drives based on the drive signal b to rotate its rotary shaft, and this rotational motion is transmitted to the winding drum 16 via the pulley 17A-transmission belt 18 and pulley 16A, The winding drum 16 is rotated to transfer the band-shaped filter material 5 immediately below the buffer distribution material 4 from the carry-out port 10 to the outside of the storage box body 3 and to be wound by the winding drum 16, and at the same time, the winding drum. The new band-shaped filter 5 wound around 15 is transferred to just below the buffer distribution material 4. At this time, the rollers 21 to 23 rotate while holding the dish-shaped reservoir B having a concave cross-section of the strip-shaped filter material 5, so that the strip-shaped filter material 5 is not damaged.
It is conveyed while being guided by 1 to 23. After that, controller 3
Reference numeral 5 denotes the entire area (buffer distribution material 4 in the internal space A of the storage box 3).
A predetermined amount is moved until a new band-shaped filter material 5 is arranged in the whole area) and a stop signal c is sent to the drive motor 17 to stop the drive of the drive motor 17.

Although the filtering device 2 in this embodiment has been described as applied to the spray type metal surface treating device 1, the present invention is not limited to this, and is applicable to any device or plant. Impurities can be removed from the liquid.

Further, the buffer distribution material 4 in this embodiment is
Although the one using a wire mesh material having a plurality of meshes is shown, the invention is not limited to this, and may be one formed by forming a plurality of through holes in a metal flat plate material, and, The band-shaped filter 5 is not limited to the one described above, and may be any one that can effectively remove impurities.

Further, in the present embodiment, the case has been described in which the band-shaped filter material 5 is wound by the winding device 6 so that the band-shaped filter material 5 is sequentially transferred, but the present invention is not limited to this. However, any structure may be used as long as it can effectively transfer the band-shaped filter 5.
Also, regarding the mechanism for pressing the band-shaped filter material 5,
The rollers are not limited to the plurality of rollers 21 to 23 as in this embodiment.

[0027]

As described above, according to the spray type metal surface treatment apparatus 1 having the continuous total volume filtration system of the present invention,
Since the buffer distribution material relaxes the processing liquid from the recovery means and distributes it in multiple directions, the band-shaped filter material is not damaged by the flow of the processing liquid, and impurities are efficiently removed from the processing liquid in a wide range. can do. Further, since the band-shaped filter material is pressed and held in a concave shape in cross section by a mechanism, the band-shaped filter material has a function of removing impurities and a function of having a dish-shaped reservoir for storing a predetermined flow rate. Even when the flow rate of the processing liquid from the tank is large, it is possible to prevent the processing liquid containing impurities from flowing out to the storage tank side and to flow only the processing liquid to the storage tank. Further, since the transfer means for transferring the band-shaped filter material is provided, a new band-shaped filter material can be easily arranged below the buffer distribution material when the impurity removal of the band-shaped filter material is reduced. As a result, even if the filtering device is disposed between the collecting means and the storage tank, the impurities are removed from the processing liquid in which the impurities collected from the collecting means are mixed, and only the processing liquid flows out to the storage tank. The processing liquid stored in the storage tank can be made into a pure processing liquid that does not contain impurities, so that the processing efficiency of the metal transport object can be improved, and the filtering device should be placed between the collecting means and the storage tank. Thus, the device itself can be downsized and the installation in the factory can be made extremely easy.

Further, the pressing mechanism presses at least the side surface portion of the band-shaped filter to form a dish-shaped reservoir having a concave cross-section, and holds the dish-shaped reservoir having a concave cross-section when the belt-shaped filter material is transferred by the transfer means. While having a plurality of rollers that guide the strip-shaped filter material without damaging it, it is not damaged even when the strip-shaped filter material is transferred, so that the efficiency of removing impurities from the strip-shaped filter material from the treatment liquid can be improved. Can be improved.

Further, detection means for detecting the liquid level of the processing liquid from the buffer distribution material received by the dish-shaped reservoir of the band-shaped filter material is provided, and when the detection means detects a predetermined liquid level, the transfer means is activated. Since the belt-shaped filter material is activated to transfer a predetermined amount to the lower part of the buffer distribution material, the impurities removed by the belt-shaped filter material are accumulated in the dish-shaped reservoir of the belt-shaped filter material to raise the liquid level. By detecting
It is possible to determine whether the function of the band-shaped filter material has deteriorated, and automatically place a new band-shaped filter material under the buffer distribution material based on the judgment, and the efficiency of removing impurities due to the band-shaped filter material from the processing liquid. Can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an overall configuration of a spray type metal surface treatment apparatus in one embodiment of the present invention.

2A and 2B are diagrams showing a configuration of a filtering device in a spray type metal surface treatment apparatus according to an embodiment of the present invention, in which FIG. 2A is a longitudinal sectional view showing the configuration of the filtering device, and FIG. It is a cross-sectional view showing a configuration.

FIG. 3 is a vertical cross-sectional view showing the overall configuration of a spray-type metal surface treatment device in the prior art.

[Explanation of symbols]

 2 Filtration device 4 Buffer distribution material 5 Band-shaped filter material 102 Metal processed product 104 Storage tank 103 Spray 105 Spray chamber 107 Supply pump B Plate-shaped storage

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Jun Maruoka 5-5-15 Nishinakajima, Yodogawa-ku, Osaka City Japan Paint Plant Engineering Co., Ltd. (72) Inventor Tetsuo Hosokawa 2-6-27, Chikko Shinmachi, Sakai City Kiwa Kogyo Co., Ltd.

Claims (3)

[Claims] 1. A spray for injecting a treatment liquid for surface-treating a conveyed metal object, a collecting means for collecting the treatment liquid injected by the spray and flowing out to a reservoir tank, and the reservoir tank. In a spray type metal surface treatment apparatus configured to include a supply means for supplying a treatment liquid from the treatment liquid to the spray, and a filtration device arranged in a circulation pipe connected to the storage tank to remove impurities from the treatment liquid. The filtering device is arranged between the collecting means and the storage tank, and relaxes the kinetic force of the flow of the processing liquid flowing from the collecting means to the storage tank to distribute the processing liquid in multiple directions. A buffer distribution material, a strip-shaped filter material that receives the processing liquids distributed in multiple directions by the buffer distribution material, removes the impurities from the processing liquid, and causes the impurities to flow into the storage tank; The band The strip-shaped filter material extends from the bottom surface to cover the storage tank and the mutual distance increases from the bottom surface toward the buffer distribution material. The dish-shaped reservoir is formed to have a concave cross-section having a side surface portion, and enters the lower portion of the buffer distribution material from diagonally above and obliquely comes out upward from the lower portion of the buffer distribution material and the concave cross-sectional shape. The spray-type metal surface treatment apparatus is characterized in that the concave shape in cross section is retained by being pressed by a pressing mechanism. 2. The pressing mechanism presses at least a side surface portion of the band-shaped filter to form the dish-shaped reservoir having the concave sectional shape, and the concave sectional shape is used when the band-shaped filter material is transferred by the transfer means. 2. The spray-type metal surface treatment apparatus according to claim 1, further comprising a plurality of rollers for holding the dish-shaped reservoir of the above and guiding the strip-shaped filter material without damaging it. 3. A detection means for detecting the liquid level of the processing liquid from the buffer distribution material received by the dish-shaped reservoir of the band-shaped filter material is provided, and the detection means detects a predetermined liquid surface water level. The spray type metal surface treatment apparatus according to claim 1, wherein the transfer means is operated to transfer a predetermined amount of the band-shaped filter material to a lower portion of the buffer distribution material.