JP3321981B2 - Surface treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a surface treatment apparatus for performing surface treatment by successively immersing a work in a plurality of kinds of treatment liquids.

[0002]

2. Description of the Related Art Surface treatment apparatuses for performing surface treatment by sequentially immersing a work in a plurality of types of treatment liquids, such as an electrodeposition coating apparatus and an electroplating apparatus, are known. FIG. 13 shows an example of an electrodeposition coating apparatus for coating an outer panel of an automobile or the like.
Sauce cutting tank C2, first electrodeposition tank C3, first filtrate tank C4, second
An electrodeposition tank C5, a second filtrate tank C6, a third filtrate tank C7, a sagging tank C8, and a washing tank C9 are arranged. Wash tank C
1 and C9 contain pure water, electrodeposition tanks C3 and C5 contain electrodeposition paint, and filtrate tanks C4, C6 and C7 contain predetermined filtrates, respectively, and the work 10 is sequentially immersed in the processing liquid. While being conveyed and baked in a baking furnace (not shown).
The width dimension of each of the processing tanks C1 to C9 is determined in advance to a constant size in accordance with the size of the work 10, and the work 10 is intermittently fed at a constant pitch P equal to the width dimension. At the same time, 1
Each of them is inserted one by one and held for a predetermined fixed processing time. This processing time is equivalent to the time of electrodeposition tank C
3, it is determined based on the electrodeposition processing conditions and the like so that a coating film of a predetermined thickness is formed by the electrodeposition processing in C5.
In the electrodeposition tanks C3 and C5, stirring is performed so that the concentration of the electrodeposition paint becomes uniform.

On the other hand, the above-mentioned electrodeposition coating apparatus is also used when electrodeposition coating relatively small parts such as a stator core of an electric motor, in which case a large number of parts are simultaneously processed in order to increase processing efficiency. Like that. The apparatus described in Japanese Patent Application Laid-Open No. H4-16421 is used when such a small component is subjected to electrodeposition coating, and as shown in FIG. A large number of small workpieces 16 such as the above-mentioned stator core are simultaneously held by a large number of holding plates 14 provided at the same time. The workpieces are intermittently fed instead of the workpieces 10 to perform electrodeposition coating.

[0004]

However, when a large number of works are attached to the holding plate for processing as described above,
Since the holding plate is also immersed in the electrodeposition paint in the electrodeposition tank to perform the electrodeposition treatment, the stirring state of the electrodeposition paint is hindered by the holding plate, and the concentration distribution varies, and each work piece is disturbed. There may be a difference in the state of coating for. Since the amount of electrodeposition paint taken out of the electrodeposition tank also increases, contamination of the filtrate tank and washing tank immersed thereafter is promoted, and the cycle of refilling the electrodeposition tank with the electrodeposition paint is shortened. . If the workpieces are held in a row in a substantially horizontal direction and only the workpieces are immersed in the electrodeposition paint, the above problem is solved, but the amount that can be processed at a time is reduced and the processing efficiency is reduced.

On the other hand, the processing time in the washing tank, the sagging tank, and the filtrate tank, which is generally shorter than the processing time in the electrodeposition tank, is the same as the processing time in the electrodeposition tank, and there is much wasted time. At the same time, the volume of each processing tank, that is, the width in the work transfer direction, is unnecessarily large when processing small workpieces, which wastes management space and installation space for processing water such as pure water, filtrate, and electrodeposition paint. there were.

The present invention has been made in view of the above circumstances, and it is an object of the present invention not to hinder the stirring of a processing solution such as an electrodeposition paint, and to take out a small amount of the processing solution. It is an object of the present invention to provide a compact and efficient surface treatment apparatus capable of obtaining high treatment efficiency.

[0007]

According to a first aspect of the present invention, a work is grasped and carried by a grasping claw, and the work is sequentially immersed in a plurality of types of processing liquids. A surface treatment apparatus for performing surface treatment,
(A) a plurality of processing tanks that are sequentially arranged in a predetermined substantially horizontal work transfer direction and contain the plurality of types of processing liquids, respectively, and (b) the gripping claws face downward and substantially horizontally. A plurality of racks that are provided in a direction substantially perpendicular to the work transfer direction and that simultaneously hold and transfer a large number of works by their holding claws; and (c) the racks between processing tanks adjacent in the work transfer direction. Are simultaneously moved by a predetermined unit quantity every predetermined unit time, and the rack is positioned in the plurality of processing tanks by a quantity proportional to the processing time, and the work held by the rack is moved by the plurality of processing tanks. And transport means for sequentially immersing in the treatment tank.

[0008]

In the above surface treatment apparatus, a large number of gripping claws are provided in a downward direction, substantially horizontal, and in a direction substantially perpendicular to the work transfer direction, and a large number of works are simultaneously held by the gripping claws. The plurality of racks to be gripped and transported are sequentially transported in the workpiece transport direction by the transport means, so that the workpieces held by the racks are sequentially immersed in a plurality of processing tanks, and the surface treatment is continuously performed. You. The transfer means simultaneously moves the rack by a predetermined unit quantity at a predetermined unit time between each processing tank adjacent in the work transfer direction, and positions each rack in an amount proportional to the processing time in each processing tank. The longer the processing time, the larger the number of works that can be processed simultaneously. That is, in a processing tank having a short processing time, a relatively small amount of work is processed and sent out to the next processing tank in a short time. Since a large number of workpieces are simultaneously processed while shifting the time, the processing time in each processing tank can be appropriately set while moving the unit quantity of racks per unit time to the next processing tank. The predetermined unit time is set to, for example, the shortest processing time among the processing times of the plurality of processing tanks, but may be set to an integral time of the shortest processing time. The predetermined unit quantity is the number of racks that are moved together and perform the same processing at the same time, and are appropriately determined according to the size of the processing tank.

As described above, in the surface treatment apparatus of the present invention, the processing time of each processing tank is determined independently, so that time is not wasted. Processing is performed simultaneously on multiple workpieces, so even if the number of workpieces held by one rack is small, high processing efficiency equivalent to that of a conventional device that holds and processes many workpieces in a plane can be obtained. Will be able to

[0010] Further, since the gripping claws for gripping the work are provided downward on the rack, only the work can be immersed in the processing liquid in the processing tank to perform the processing. No need to immerse. For this reason, the stirring of the processing liquid such as the electrodeposition paint is not hindered, and the unevenness of the surface processing due to the variation in the concentration distribution of the processing liquid is prevented. The replenishment is reduced, and the contamination of the processing tank into which the workpiece is subsequently immersed is reduced.

Further, since a plurality of processing tanks have different numbers of workpieces to be simultaneously processed, a processing tank having a short processing time and a small processing quantity is smaller than a processing tank having a long processing time and a large processing quantity. It is possible. Thus, for example, in the case where a plurality of types of processing with different processing times are performed successively as in the above-mentioned electrodeposition coating apparatus, an electrocoating tank having a long processing time may be used for a washing tank, a sagging tank, and a filtrate tank, which may have a short processing time. It is possible to reduce the installation space by making the apparatus compact, and to reduce the amount of the processing liquid to facilitate the management.

[0012]

According to a second aspect of the present invention, there is provided the surface treatment apparatus of the first aspect, wherein the transporting means comprises:
(A) The plurality of receiving members engaging with the rack are raised, moved forward, lowered, and retracted at the unit time, so that the racks are simultaneously lifted by the unit quantity, and the next processing tank in the work transfer direction is moved. And (b) a plurality of unit quantities of racks supplied per unit time by the transfer device in a processing tank having a processing time longer than the unit time, and processing the work. A belt conveyor for sequentially moving the workpiece in the direction of transporting the workpiece while being immersed in the liquid.

[0013]

In such a surface treatment apparatus, the rack is moved between the plurality of processing tanks by the transfer device, while the processing tank having the processing time longer than the unit time is moved by the belt conveyor. Since the rack is supported and moved in the work transfer direction while the work is immersed in the processing solution, it is compared with pitch feeding while moving the rack up and down, for example, between processing tanks and inside the processing tank. As a result, the predetermined surface treatment for the work is continuously performed for a predetermined time, so that the surface treatment quality is improved and the entire time required for the treatment can be reduced. The belt conveyor may be one that intermittently feeds a rack at a constant pitch per unit time similarly to the transfer device, or one that continuously feeds the rack at a constant transport speed. If the speed is reduced, the width of the processing tank (the dimension in the work transfer direction) can be reduced, and the surface processing apparatus can be made more compact. Further, since the transfer device moves the rack by raising, advancing, descending, and retreating a plurality of receiving members, the rack is locked to a chain belt that travels in the work transfer direction while meandering up and down, for example. As compared with the case where the transfer is carried out in a short time, the transfer device can be easily arranged while maintaining the device size in the work transfer direction compact, and the rack can be moved quickly between the processing tanks.

[0014]

According to a third aspect of the present invention, there is provided a surface treatment apparatus according to the first or second aspect of the present invention, wherein the gripping claws are connected to both end faces of the work. (A)
The rack has a large number of supports protruding in a substantially horizontal direction at the same interval as the gripping claws provided on the rack, and the support supports the work, and (b) moves the support up and down. (C) urging the support member upward to always hold it at the upper end position, and supporting the support member when it is relatively approached to the rack and engaged with the gripping claw. An elastic member that allows the member to be pushed down, and wherein the gripping claw is engaged with the support member or the support pin, and the work caught on the support pin is gripped by the gripping claw. A work delivery jig for delivery is provided.

[0015]

In the surface treatment apparatus having such a work transfer jig, the support member, which has previously supported the work on a large number of supports, engages with the gripping claws of the rack in accordance with the biasing force of the elastic member. In this state, the workpiece supported by the support is gripped and delivered by the gripping claws, and thus has a thickness of 1 m, such as a stator core.
Even a work having a cylindrical shape of m or less can be reliably transferred to the rack, and the burden on the operator is greatly reduced as compared with a case where the work is manually attached.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view showing an entire configuration of a surface treatment apparatus for performing electrodeposition coating on a work 20 such as a stator core of an electric motor obtained by stacking punched silicon steel plates, and includes a processing vessel 22 and a baking furnace 24. ing. The processing container 22 includes a washing tank C1, a sagging tank C2, a first electrodeposition tank C3, a first filtrate tank C4, a second electrodeposition tank C5, a second filtrate tank C6, 3
The treatment tank is divided into a total of ten treatment tanks, a filtrate tank C7, a draining tank C8, a washing tank C9, and an air blow tank C10. The washing tanks C1 and C9 are pure water, and the electrodeposition tanks C3 and C5 are electrodeposited. The paint and the filtrate tanks C4, C6, and C7 each contain a predetermined filtrate. Processing tank C containing these processing liquids
1, C3 to C7 and C9 correspond to the processing tank described in claim 1. The electrodeposition tanks C3 and C5 are tanks for electrodepositing a predetermined resin coating on the work 20, and are provided with a stirrer for stirring the electrodeposition coating so that a coating film having a constant thickness is formed.

The work 20 is mounted on a rack 26 shown in FIG.
Are transported to each of the processing tanks C1 to C10 of the processing container 22 sequentially. The rack 26 is provided with a large number (about 20 in this embodiment) of gripping claws 30 in a row in the longitudinal direction. The gripping claws 30 are fixed to both side surfaces of the rack 26 and extend downward in a pair. It consists of. At least one of the pair of claw members 32 is formed of a spring plate material, and the upper end of the work 20 is gripped by its own spring force at the tip portion bent inward. The length of the claw member 32 is appropriately determined according to the size of the work 20 such as the stator core. In this embodiment, the length is set to about 100 mm so as to correspond to a plurality of types of works 20 having different sizes.

The work 20 is mounted on the rack 26 at the work mounting portion 34 shown in FIG. The stator core as the work 20 has a cylindrical shape, and its thickness is as thin as about 0.5 to 0.7 mm.
For example, it is automatically mounted on the rack 26 using a work delivery jig 36 shown in FIG. The work delivery jig 36
Base member 40 driven up and down by cylinder 38
And a support member 44 disposed on the base member 40 so as to be movable in the vertical direction via a guide rail 42 as a guide member, and an upper end which urges the support member 44 upward to always contact the stopper 46. And a spring 48 as an elastic member that holds the position and allows it to be pushed down. The support member 44 is mounted on the rack 26.
A plurality of support pins 50 as support tools are provided at the upper end of the support pins 50 at the same interval as the gripping claws 30 in a substantially horizontal direction. The work 20 is hooked on the support pins 50 by manual operation or an automatic input device (not shown) in advance. The cylinder 52 is located above the workpiece transfer jig 36.
Are disposed, and the rod of the claw member 32 of the rack 26 is positioned at the work receiving position on the work delivery jig 36.
Through one of the holes to expand the other against the spring force. A large number of cylinders 52 may be provided corresponding to the gripping claws 30, but a large number of push rods may be attached to the rod of the single cylinder 52 to expand the multiple gripping claws 30. In addition to the spring 48, the elastic member includes a leaf spring, a rubber piece, a foamed resin piece, and a fluid operating body such as an air cylinder.

When the work 20 is mounted on the rack 26 using the work transfer jig 36, the rack 2
The base member 40 is raised by the cylinder 38 while the gripper 6 is positioned at the work receiving position on the work delivery jig 36 and the gripping claw 30 is expanded by the cylinder 52. At this time, the support pins 50 and the support members 44 are moved to the large number of gripping claws 30 as shown in FIG.
The supporting member 44 is relatively separated from the stopper 46, and is pressed by the claw member 32 according to the urging force of the spring 48. At this time, the work 20 hooked on the support pin 50 is located between the two claw members 32 and the cylinder 52
When the gripping claw 30 is closed by its own spring force, the pair of claw members 32 engage with both end surfaces of the work 20 and securely grip the work 20. After that, if the base member 40 is lowered by the cylinder 38, FIG.
(B), the support pins 50 are also lowered, and in this state, for example, the work delivery jig 36 is moved rightward to extract the support pins 50 from the work 20, so that the work 20 can be mounted on the rack 26. Complete.

Returning to FIG. 1, the rack 26 on which the large number of works 20 are mounted by the work mounting portion 34 is substantially horizontal and substantially perpendicular to the work transfer direction, that is, substantially perpendicular to the paper surface of FIG. In the posture described below, the wafer is conveyed to the vicinity of the processing container 22 by the chain belt 54, and is transferred to the conveying device 56 disposed above the processing container 22. A pair of chain belts 54 are horizontally separated from each other to support both ends of the rack 26, and are driven in synchronization by an electric motor (not shown).
The transfer device 56 corresponds to a transfer means,
1 and is intermittently fed leftward in FIG. 1 by a predetermined constant feed pitch P, and is sequentially moved to the processing tanks C1 to C10.
It is configured as follows.

5 and 6, the base plate 60 is suspended by four wires 62.
Each of these wires 62 is wound around a roller 64 whose position is fixed, and is locked by a moving bar 66. The moving bar 66 is supported by a guide (not shown) so as to be movable in a substantially horizontal straight line direction.
The base plate 60 is moved up and down by the reciprocating movement of the moving bar 66. In the moving bar 66,
A wire 72 having a balancer 70 attached to the distal end is locked from the side opposite to the wire 62, and supports the base plate 60 in a balanced state. Base plate 60
A pair of guide rails 74 is fixedly mounted on both sides of the lower surface of the base member in parallel with the work transfer direction, and a pair of moving frames 78 are suspended via a plurality of rollers 76 so as to be movable in the work transfer direction. . The pair of moving frames 78
In the work transfer direction, the receiving container 80 has substantially the same length as the processing container 22, and a large number of receiving members 80 are attached at intervals of the feed pitch P, and as shown in FIG. It can be lifted together. The pair of moving frames 78 are integrally connected by a connecting member 79, and are reciprocated by the cylinder 82 in the work transfer direction by the same dimension as the feed pitch P. Note that, instead of the cylinders 68 and 82, other vertical driving means and horizontal driving means using a link mechanism, a feed screw, or the like may be employed.

The receiving member 80 includes a base plate 60
Is raised by the cylinder 68 so that the work 20 lifts the rack 26 to the height positioned above the processing container 22 as shown by a solid line in FIG. 6, while the base plate 60 is lowered by the cylinder 68. As a result, the rack 26 is lowered to a height at which the rack 26 is placed on the side wall of the processing container 22 as shown by a two-dot chain line in FIG. Accordingly, when the moving frame 78 is moved by the cylinder 82 in the work transfer direction by the feed pitch P in a state where the rack 26 is lifted, and when the moving frame 78 is lowered by the cylinder 68 in that state, the rack 26 is moved in the work transfer direction by the feed pitch P. Processing container 2 sent
2 is placed. In this state, the moving frame 78
Is returned by the cylinder 82 in the direction opposite to the work transfer direction by the feed pitch P, and is raised by the cylinder 68. The racks 26 at the front are lifted one by one, and these operations are repeated. The sheet is intermittently fed by the feed pitch P and is placed on the processing container 22. When the rack 26 is placed on the processing container 22, the work 20 held by the rack 26 is held in the processing container 22, and the processing tanks C1, C3 to C7 containing the processing liquid. , C9, the workpiece 20 is immersed in the processing liquid. At this time, the rack 26 protrudes above the processing liquid, and only a part of the gripping claw 30 extending downward is immersed in the processing liquid together with the work 20.
The intermittent feed of the rack 26 is performed at a predetermined unit time T, and the work 20 is held in the processing tanks C1 to C10 for the unit time T every time the rack 26 is fed by the feed pitch P.

Returning to FIG. 1, the width of the processing tanks C1 to C10, that is, the dimension in the work transfer direction is determined in proportion to the processing time, and the first electrodeposition tank C having a long processing time.
3. The size of the second electrodeposition tank C5 is four times that of the other processing tanks.
The feed pitch P is a processing tank having a short width, that is, C
Each of the processing tanks C1, C2, C4, and C6 to C10 is set to have the same dimensions as those of the processing tanks other than C3 and C5. In the processing tanks C3 and C5, the processing is performed for a time 4T, which is four times the unit time T, respectively. Also,
In the processing tanks C1, C2, C4, and C6 to C10, the work 20 of one rack 26 is only processed at a time, but in the processing tanks C3 and C5, four racks 26 are simultaneously processed.
Will be processed. In this embodiment, the feed pitch P, ie, the processing tanks C1, C2, C4, C
The width of 6 to C10 is about 100 to 200 mm, the width of the processing tanks C3 and C5 is about 400 to 800 mm, and the unit time T is about 20 to 40 seconds. Also,
The unit quantity of the rack 26 to be conveyed is one.

The workpiece 20 which has been intermittently fed at a feed pitch P by the transfer device 56 to form a predetermined resin coating film and which has been air blown in the last processing tank C10.
Is transferred to the chain belt 84 while being held by the rack 26, and is conveyed in the baking furnace 24, where the printing is performed. The work 20 for which printing has been completed is removed from the rack 26 at the work removal outside 86, and the rack 26 from which the work 20 has been removed is returned to the work mounting portion 34 by the return chain belt 88. The return chain belt 88 is provided with a number of hooks 90 for suspending the rack 26.

Here, in the surface treatment apparatus of this embodiment, the widths of the processing tanks C1 to C10 are determined in proportion to the required processing time, and the processing tanks C1, C2, C4, and C6 have a short processing time.
To C10 are about 1/4 of the processing tanks C3 and C5, which have a long processing time. Therefore, the total length of the processing container 22 is shortened, the apparatus is compact, the installation space is reduced, and the processing liquid is reduced. And the management becomes easy. Further, racks 26 each having a quantity proportional to the processing time are located in each of the plurality of processing tanks C1 to C10, and one rack 26 is gripped in each of the processing tanks C1, C2, C4, and C6 to C10. While processing is performed on the work 20 for the unit time T, the processing tanks C3 and C5
Since a large number of works 20 gripped by the racks 26 are processed only for four times the unit time T, there is no waste of time, and the work held by one rack 26 Even if the number of 20 is small, a high processing efficiency equivalent to that of a conventional apparatus that holds and processes a large number of works in a plane can be obtained. Work 2 by one rack 26
Since the number of grips of 0 is smaller than the number of holdings by the holding plate 14 in FIG. 14, the production management unit is small, and it is possible to suitably cope with high-mix low-volume production.

The gripping claw 3 gripping the work 20
0 is provided downward on the rack 26 and only a part of the gripping claw 30 is immersed in the processing liquid together with the work 20. Therefore, when the entire holding plate 14 as shown in FIG. In comparison, the agitation of the electrodeposition paint in the electrodeposition tanks C3 and C5 is not hindered, and the surface treatment unevenness due to the unevenness in the concentration distribution of the processing solution, and in this case, the unevenness of the coating film thickness is prevented. You. In addition, since the amount of the processing liquid taken out is also reduced, replenishment of the processing liquid is reduced,
Thereafter, contamination of each processing tank in which the work 20 is immersed is reduced. The gripping claws 30 are fixed to the rack 2 by bolts or the like.
6, the rack 26 is not immersed in the processing liquid as described above, so that there is no paint adhered, and the gripping claws 30 can be easily replaced as needed.

On the other hand, in the present embodiment, the workpiece delivery jig 36
, A large number of works 20 are mounted on the rack 26 at the same time, so that the burden on the operator is greatly reduced as compared with the case where the work 20 is manually mounted. In particular, the work delivery jig 36 includes a support member 44 in which a cylindrical work 20 is previously hooked on a large number of support pins 50.
The gripping claws 3 of the rack 26 according to the urging force of the spring 48
0, the workpiece 20 hooked on the support pin 50 is gripped by the gripping claws 30 and delivered, so that the thickness of the workpiece 20 is 1 m, such as a stator core.
m can be reliably transferred to the rack 26.

In the above embodiment, the vertical cylinder 6
The rack 26 is intermittently fed by the transfer device 56 having the cylinder 8 and the moving cylinder 82.
Transport means as shown in FIGS. 7 and 8 (a) to (e) can also be adopted. FIG. 7A shows the processing container 22.
In the case where the rack 26 is intermittently fed using a single chain belt 92 that moves up and down at a constant pitch,
(B) is a combination of three chain belts 94, 96, 98 that move up and down at a fixed pitch and two chain belts 100, 102 that move the rack 26 in a substantially horizontal direction. This is a case where the work 20 is immersed in the processing liquid by intermittently feeding the rack 26 in the substantially horizontal direction by 104 and moving the processing container 22 up and down. In FIG. 7B, the chain belt 94,
96 and 98 are intermittently driven similarly to the chain belt 92 of (a), but the racks 26 and 98 are placed on the processing tanks C3 and C5.
May be driven intermittently or continuously at a low speed. 8D is different from that of FIG. 7B in that the rack 26 is moved up and down in the same manner as the transfer device 56 in place of the chain belts 94, 96 and 98, and the pitch is intermittently fed by one pitch. FIG. 8 (e) shows a case where the rack 26 is transported by a single chain belt 112 similarly to FIG. 7 (a), and the processing tanks C3 and C5 are provided. The above is a case where the rack 26 is moved in a substantially horizontal direction. A pair of the above-described chain belts is disposed on both sides of the processing container 22, respectively, so as to support and transport both ends of the rack 26. FIG. 8D shows an embodiment according to the second aspect of the present invention, in which the chain belts 100 and 102 correspond to a belt conveyor.

The transfer means shown in FIGS. 7 (b) and 8 (d) and (e) move the rack 26 up and down when transferring the work 20 to the next processing tank. In the processing tanks C3 and C5 longer than the unit time T, the work 20
The rack 26 is moved in the horizontal direction while immersed in the processing solution.
3 and C5, the rack 26 is moved up and down every unit time T to feed the work 2 in comparison with the case where the pitch is fed.
The predetermined surface treatment for 0 is continuously performed for a predetermined time, that is, 4T, so that the surface treatment quality is improved and the entire time required for the surface treatment can be shortened. 7B and FIG. 8D, the rack 2 by the chain belts 100 and 102 is used.
By reducing the transfer pitch of No. 6 or slowing the transfer speed in the case of continuous driving, the width of the processing tanks C3 and C5 can be made narrower than in the above embodiment, and the surface treatment apparatus can be made more compact. It is possible to In order to make the processing time in the processing tanks C3 and C5 the same as in the above embodiment in the case of FIG. 8E, the processing time is taken into consideration by the amount of movement of the chain belt 112 due to the vertical movement accompanying the pitch feed. The width of the tanks C3 and C5 will be increased.

FIGS. 9 and 10 show a specific example of the transfer device 110 shown in FIG.
The frame body 120 movably arranged in the work transfer direction on the rear side of the frame 2 is moved in the work transfer direction by the horizontal drive means 122 including a link mechanism, a cylinder, or a feed screw. Only to be reciprocated. A plurality of guide rods 124 are fixedly arranged in the vertical direction on the frame body 120, and a slide member 126 is provided on each of the guide rods 124 so as to be movable in the vertical direction.
It is designed to be driven up and down by a vertical driving means 130 composed of an electric motor or the like via a wire 128.
The horizontal frames 132 are fixedly mounted on the plurality of slide members 126, and the plurality of support frames 1 extend over a pair of horizontal frames 132 located on both sides of the processing container 22.
A pair of receiving members 136 are fixed to the support frame 134 and are engaged with and lifted at both ends of the rack 26 similarly to the receiving member 80. The receiving member 136 is raised by the vertical driving means 130 so as to be engaged with the processing container 22 or the rack 26 supported by a support portion (not shown) and lifted up. After being moved forward by the feed pitch P, the rack 26 is moved down by the vertical drive means 130 to move the rack 26 by the feed pitch P in the work transfer direction, so that the work 20 is immersed in the next processing tank, and It is moved back to the original position by the driving means 122. The receiving member 136 is made to stand by at the position before the retreat, and the unit time T
Each time the rack 20 is moved backward, upward, forward, or downward, the rack 20 may be transferred. The vertical movement and the horizontal movement can be partially overlapped. The support frame 134 is disposed at a boundary between the plurality of processing tanks, and is configured to simultaneously transfer the racks 26 one by one from an upstream processing tank to an adjacent downstream processing tank in the work transfer direction. .

According to such a transfer device 110, the feed pitch P is set relatively freely by the stroke of the horizontal drive means 122, so that the work is moved while meandering up and down as shown in FIG. The feed pitch P can be reduced as compared to the case where the rack 26 is locked and transported by the chain belts 94, 96, 98 that are run in the transport direction,
The transfer device 110 can be easily arranged while keeping the device size in the work transfer direction compact, and the rack 26 can be moved quickly between the processing tanks.

In the transfer device 140 shown in FIG. 11, the frame 120 is fixedly disposed and the guide rod 124 is disposed on the frame 120 so as to be movable in the work transfer direction, as compared with the transfer device 110 described above. In the case where the guide rod 124 is reciprocated in the work transfer direction by the horizontal driving means 122, substantially the same operation and effect as the transfer device 110 can be obtained.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention can be embodied in other forms.

For example, the surface treatment apparatus for performing electrodeposition coating has been described in the above embodiment, but the present invention can be applied to other surface treatment apparatuses such as an electroplating apparatus.

In the above-described embodiment, the case where the cylindrical stator core is electrodeposited is described. However, the shape and material of the work are not limited to this, and other different parts such as cylindrical parts and metal powder molding may be used. Surface treatment can be performed on workpieces of various shapes and materials such as products and forged products.

In the above-described embodiment, the gripping claw 30 is expanded by bringing the rod of the cylinder 52 into contact with one of the claw members 32. The expanding means of the gripping claws 30 can be appropriately changed, for example, by inserting a material and simultaneously expanding a large number of gripping claws 30.

Although the gripping claws 30 of the above embodiment grip the work 20 with a pair of claw members 32, the number of claw members is appropriately determined. One rack 26
It is also possible to provide two rows of gripping claws 30 or three or more rows.

Further, the work delivery jig 36 of the above embodiment is used.
In FIG. 1, a support pin 50 is provided as a support tool. In addition, for example, a pair of pins 51, 51 for supporting the workpiece 20 below as shown in FIG.
As shown in FIGS. 2B and 2C, concave receiving pieces 53 and 55 may be provided. In these cases, it is not necessary to slide the jig when transferring the jig to the gripping claws 30.

In the above-described embodiment, the racks 26 are moved one by one. However, a plurality of racks 26 may be moved as one unit.

In the above embodiment, the shortest processing time of the processing times of the plurality of processing tanks is set to the unit time T. However, the rack 26 is set to a unit time that is a fraction of the shortest processing time. It is also possible to make it move.

Although not specifically exemplified, the present invention can be implemented in various modified and improved forms based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an overall configuration of a surface treatment apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a rack that grips and transports a work in the surface treatment apparatus of FIG. 1;

FIG. 3 is a diagram illustrating a work delivery jig for mounting a work on the rack of FIG. 2;

FIG. 4 is a diagram illustrating an operation when a work is mounted on a rack using the work delivery jig of FIG. 3;

FIG. 5 is a perspective view of a transport device that intermittently feeds a rack in the surface treatment device of FIG. 1;

FIG. 6 is a sectional view of the transfer device of FIG. 5;

FIG. 7 is a view for explaining another mode of the transport means for transporting the rack.

FIG. 8 is a view for explaining still another mode of the transport means for transporting the rack.

FIG. 9 is a diagram illustrating a specific example of the transport unit of FIG. 8D.

FIG. 10 is a perspective view illustrating a transfer device in the transport unit of FIG. 9;

FIG. 11 is a perspective view illustrating another mode of the transfer device of FIG. 10;

FIG. 12 is a view for explaining a different aspect of the work delivery jig in the surface treatment apparatus of FIG. 1;

FIG. 13 is a diagram illustrating an example of a conventional electrodeposition coating apparatus.

14 is a diagram illustrating a holding plate that holds a large number of small parts when the small parts are subjected to electrodeposition coating using the electrodeposition coating apparatus of FIG.

[Explanation of symbols]

20: Work 22: Processing Container 26: Rack 30: Gripping Claw 36: Work Delivery Jig 42: Guide Rail (Guide Member) 44: Support Member 48: Spring (Elastic Member) 50: Support Pin (Support Tool) 56: Transport Apparatus (conveyance means) 92, 94, 96, 98, 104: chain belt (conveyance means) 100, 102: chain belt (belt conveyor, conveyance means) 110, 140: transfer device (conveyance means) 136: receiving member C1 , C3 to C7, C9: Processing tank

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ identification code FI C25D 17/06 C25D 17/06 B (58) Field surveyed (Int.Cl. ⁷ , DB name) C25D 13/00 304 C25D 13 / 00 303 B65G 47/90 B65G 49/04 C25D 17/06

Claims (3)

(57) [Claims] 1. A surface treatment apparatus for gripping and transporting a workpiece by a gripping claw and sequentially immersing the workpiece in a plurality of types of processing liquids to perform a surface treatment, comprising a predetermined substantially horizontal workpiece transport. A plurality of processing tanks which are sequentially arranged in a plurality of directions and respectively contain the plurality of types of processing liquids, and a plurality of gripping claws are provided downward and substantially horizontally in a direction substantially perpendicular to the work transfer direction. A plurality of racks for simultaneously gripping and transporting a large number of workpieces with claws; and between the processing tanks adjacent in the workpiece transport direction, the racks are simultaneously moved by a predetermined unit quantity every predetermined unit time, and Transport means for arranging the racks in the plurality of processing tanks by an amount proportional to the processing time, and sequentially immersing the work held by the racks in the plurality of processing tanks. A surface treatment apparatus comprising: 2. The method according to claim 1, wherein the plurality of receiving members engaging with the rack are raised, moved forward, lowered, and retracted at the unit time, thereby simultaneously lifting the rack by the unit quantity and working the workpiece. A transfer device for moving to the next processing tank in the transport direction; and a processing tank having a processing time longer than the unit time, supporting a plurality of unit quantities of racks supplied per unit time by the transfer device. 2. The surface treatment apparatus according to claim 1, further comprising: a belt conveyor for sequentially moving the work in the work transfer direction while immersing the work in a processing liquid. 3. The gripping claws engage with both end faces of the work to grip the work, and a plurality of supports protruding in a substantially horizontal direction at the same interval as the gripping claws provided on the rack. And a guide member that guides the support member in the up-down direction, and urges the support member upward to always maintain the support member at the upper end position. And an elastic member that allows the support member to be pushed down when it is relatively approached to the rack and engaged with the grip claw, wherein the grip claw is the support member or the support tool. 3. The surface treatment apparatus according to claim 1, further comprising a work delivery jig for gripping and transferring the workpiece supported by the support tool with the gripping claw in a state of being engaged with the workpiece.