JP3256682B2 - Chuck for surface treatment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck for holding an object to be processed, processing, transporting, etc. in various processing steps such as surface treatment, for example, plating.

[0002]

2. Description of the Related Art In a surface treatment such as electroplating, there are a number of surface treatment steps, and an object to be processed (including an electronic component and a printed board) having a plate shape, a flat shape, or a flat holding portion is sandwiched and held. A chuck is used not only for the operation in each processing step but also for transport between the processing steps. This chuck is electrically conductive and is attached to a suspendable member generally called an hanger rack which is transported by an intermittent transport means.

[0003] In the electroplating step, after the degreasing treatment and the water washing treatment, an acid washing treatment is performed in order to dissolve the oxide on the surface of the object to be treated and obtain the metal surface. In this pickling, hydrochloric acid or sulfuric acid is generally used. Accordingly, the chuck is preferably made of an acid-resistant material, and is preferably made of an elastic material capable of securing a clamping force. Therefore, stainless steel is usually employed.

[0004]

However, the conventional chuck is immersed in a processing liquid (chemical) together with the object to be processed, so that it can be used for only about two months and has a very short life. However, since the stainless steel chuck has a spring property to obtain the holding force of the workpiece,
At present, this must be used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide a large corrosion resistance and a long service life, as well as a sufficient and strong holding force for an object to be processed. Another object of the present invention is to provide a surface treatment chuck that can reduce the cost.

[0006]

According to the present invention, the following technical measures are taken to achieve the above object. That is,
The present invention relates to a surface treatment chuck for sandwiching and holding an object to be processed, a corrosion-resistant metal chuck body having a moderate elasticity in which a plurality of chuck piece mounting portions are arranged in a row, and the chuck piece mounting portion. And a chuck piece made of a Ni-Mo alloy connected and integrated with the chuck piece. The adjacent chuck pieces are opened and closed to the opposite sides to each other, and are configured so as to clamp the workpiece by the elastic force of the chuck piece mounting portion. The feature is that it is.

[0007] In this case, the chuck body has sufficient resilience to hold the object to be processed and strong spring properties.
The chuck can be surely chucked, and the part immersed in the processing chemical is made of a Ni-Mo alloy (commonly called Hastelloy alloy), so that it has several times the durability as compared with the conventional chuck. In addition, it is possible to reduce the cost due to a longer life.

When a chuck piece is attached to the chuck piece mounting portion of the chuck body, it can be easily connected and integrated by spot welding. When the chuck piece immersed in the processing chemical is worn, the chuck piece can be replaced with a new one and the chuck body can be reused. Further, in the chuck according to the present invention, the chuck body is made of a stainless steel plate, and the one-side mounting portion of the chuck is bent in a shape of a letter when viewed from the side and the bending protrusions are alternately positioned outside, and It is characterized in that a resilient force for generating a pinching force is applied. According to this configuration, the chuck piece mounting portion of the chuck body can exhibit strong spring properties,
It is possible to stably carry out processing operations and the like by reliably holding the object to be processed.

Further, in the chuck according to the present invention, the chuck main body includes a pair of chuck bodies in which mounting portions for chuck pieces are provided at intervals slightly larger than the width of the mounting portion. The feature is that they are connected and integrated so that they are alternately located outside and lined up. In this case, the chuck body can be easily formed, and the same shape and dimensions can be superimposed in the left and right directions to be connected and integrated, so that the workability can be improved.

Further, in the chuck according to the present invention, the chuck piece may bend the strip-shaped plate into a shape of a side view and further bend the workpiece holding portion at the leading end in the opposite direction. When the holding portions are opposed to each other, the holding portions are formed so as to be parallel to each other, and are connected to the chuck piece mounting portion such that the bending protrusion of the chuck piece is located on the opposite side to the bending protrusion of the chuck body. There is a feature in the point.

[0011] According to this configuration, by pressing the bent protruding portions of the chuck pieces inwardly facing each other, the tips, ie, the workpiece holding portions, can be opened outwardly facing each other, and the holding of the workpiece can be performed. In addition, the detachment operation can be easily performed, and the workability can be improved. Further, the chuck according to the present invention is characterized in that the workpiece holding portion of the chuck piece is wide, and the adjacent holding portions overlap each other and open and close in opposite directions. Therefore, the holding area of the object to be processed is increased, the object to be processed can be strongly and stably held, and the workability of attaching the chuck piece to the chuck body can be improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The drawings show an embodiment of the surface treatment chuck 1 according to the present invention. This chuck 1
Is used for surface treatment such as electroplating,
It is most suitable for holding a plate-like workpiece P such as a printed board, and as shown in FIGS. 3 and 4, bolts and nuts are fixed to a mounting plate 3 provided below and parallel to the hanger rack 2. It is detachably attached by the tool 4.

The hanger rack 2 has a function of holding the object to be processed P in the processing liquid and energizing the processing liquid. The hanger rack 2 is provided with a power supply brush 5, and a grip portion 6 of a transfer robot is provided at both upper ends. I have. The chuck 1 includes a chuck body 7 made of a stainless steel plate having conductivity and corrosion resistance,
A large number of chuck pieces 8 made of a Ni—Mo alloy (hereinafter, referred to as “Hastelloy” (registered trademark)) are provided.
Then, the chuck body 7 includes a body constituent member 7 shown in FIG.
A is a set of two sheets A superposed in opposite directions.

As shown in FIG. 5, the main body constituting member 7A is provided with a chuck piece mounting portion 9 having a thread cross-section in a front view at one end (lower side) in the width direction of the band-shaped plate. The mounting portions 9 are provided at a constant interval S slightly larger than the width W of the mounting portion 9, and are bent in a certain direction in a shape like a side view as shown in FIG. A sufficient resilience is applied to hold the chuck piece 8, and as shown in FIG. 2, the upper end of the chuck piece 8 is superimposed on the lower end of the mounting portion 9 and connected and integrated by spot welding. .

The two main body constituting members 7A are overlapped with each other so that the bent protruding portions 9A of the chuck piece attaching portion 9 are located outside each other, that is, the left and right sides are opposite to each other, and the upper plate surfaces are overlapped. The chuck piece mounting portions 9 are positioned so as not to overlap each other, and are connected and integrated by spot welding or the like to form the chuck body 7. Further, the main body constituting member 7A is provided with a mounting hole 10 for the mounting plate 3 so that the mounting hole 10 coincides when the left and right sides are overlapped.

As shown in FIGS. 7 and 8, the chuck piece 8 is formed of a strip-shaped plate having a wide workpiece holding portion 11 at a front end (lower end). The holding portion 11 is further bent in the opposite direction while being bent in a letter shape, and is formed so as to be parallel to each other when the adjacent chuck pieces 8 face each other in the assembled state. In the center of the chuck piece 8, a vertically long groove 12 is formed in which the bent projection 8A side is depressed.

The upper end of the chuck piece 8 is connected to the mounting portion 9 of the chuck body 7. The bending projection 8A is connected to the bending projection 9A of the mounting portion 9 as shown in FIG. , And the left and right ends of the adjacent object holding portion 11 are arranged so as to overlap each other on the opposite side, and open in the opposite direction (in the pushing direction indicated by the solid arrow in FIG. 2), In addition, it is configured to close in the opposite direction and strike.

In the above embodiment, when the chuck pieces 8 are to be opened, the bent projections 8A are pressed inwardly opposite each other as shown by arrows in FIG. Thereby, the object holding portion 11 can be opened as shown by a two-dot chain line in FIG. 2, and when the pressing force is released, the holding portion 11 closes due to the elastic force of the mounting portion 9 and mutually Demonstrate the pinching force by contact.

The constituent member 7A of the chuck body 7
Is made of a stainless steel plate different from the chuck piece 8,
If the same Hastelloy as the chuck piece 8 is used, the required holding force of the workpiece P cannot be obtained, that is, a strong elastic force (spring performance) cannot be obtained, and the workpiece P may fall off. This is because it is more advantageous in terms of cost.

According to the above embodiment of the present invention, the durability of the chuck 1 can be several times higher than that of the conventional chuck, the cost can be reduced, and the frequency of replacing the worn chuck is greatly increased. It is possible to reduce maintenance time, make maintenance and management easier, reduce equipment downtime, increase the operation rate, and improve productivity. By forming the chuck main body 7 with a set of two main body constituting members 7A, molding can be easily performed and the processing cost can be reduced. It should be noted that the object to be processed P can be adopted to anything having a portion that can be pinched in addition to the plate-like body.

The present invention is not limited to the above-described embodiment. For example, the chuck body 7 can be formed by alternately bending the mounting portions 9 to the opposite side with a single plate material. The chuck piece 8 can also be configured to bend in the shape of a letter when viewed from the side so that the holding portions at the tips abut in parallel with each other, and the design can be changed as appropriate.
It is possible to adopt a corrosion-resistant metal other than a stainless steel plate, which is suitable for a treatment chemical that can provide a sufficient elasticity. Further, the present invention can be used for various surface treatments other than plating.

[0022]

As described above, the present invention relates to a surface-treating chuck for holding an object to be processed therebetween, the corrosion-resistant metal having a moderate elasticity in which a plurality of chuck piece mounting portions are arranged in a row. Chuck body, and a Ni-Mo alloy chuck piece integrally connected to the chuck piece mounting portion. Adjacent chuck pieces open and close to the opposite sides to each other, and the elastic force of the chuck piece mounting portion Since it is configured to hold the workpiece, it has several times the durability as compared with the conventional chuck, not only can reduce the cost, but also can reduce the frequency of replacing the worn chuck by the conventional number. It is possible to greatly reduce the facility downtime by reducing the facility downtime by a factor of 1 to increase the operation rate, improve productivity, and facilitate maintenance and management.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a surface treatment chuck according to the present invention.

FIG. 2 is an enlarged right side view of FIG. 1;

FIG. 3 is a front view showing a state where the chuck of the embodiment is attached to a hanger rack.

FIG. 4 is a right side view of FIG.

FIG. 5 is a front view showing a main body constituting member of the chuck main body in the embodiment.

FIG. 6 is a right side view of FIG.

FIG. 7 is a front view of the chuck piece alone in the embodiment.

FIG. 8 is a right side view of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface treatment chuck 7 Chuck main body 7A Main body constituent member 8 Chuck piece 8A Bending projection 9 Chuck piece attaching section 9A Bending projection 11 Workpiece holding section P Workpiece

Claims (5)

(57) [Claims] 1. A surface-treating chuck for holding an object to be processed therebetween, comprising: a corrosion-resistant metal chuck body having a moderate elasticity in which a plurality of chuck piece mounting portions are arranged in a row; A chuck piece made of a Ni-Mo alloy connected and integrated with the part, the adjacent chuck pieces are opened and closed to the opposite sides to each other, and the workpiece is held by the elastic force of the chuck piece mounting part. A chuck for surface treatment, comprising: 2. The chuck body is made of a stainless steel plate, and the one-side mounting portion of the chuck is bent in a shape of a side view and the bent protrusions are alternately positioned outside to generate a clamping force. The surface treatment chuck according to claim 1, wherein an elastic force is applied. 3. The chuck main body comprises a pair of chuck members provided with attachment portions for chuck pieces at intervals slightly larger than the width of the attachment portion, and the bent protruding portions of the attachment portions are alternately located outside. 3. The chuck for surface treatment according to claim 1, wherein the chucks are connected and integrated so as to line up. 4. The chuck piece bends the strip-shaped plate into a letter shape as viewed from the side, and further bends the workpiece holding portion at the tip in the opposite direction so that the holding portions face each other in the assembled state. The bending protrusion of the chuck piece is connected to the chuck piece mounting portion such that the bending protrusion of the chuck piece is located on the opposite side to the bending protrusion of the chuck body. 4. The chuck for surface treatment according to 1, 2, or 3. 5. The processing object holding portion of the chuck piece is made wide so that adjacent holding portions overlap each other and open and close in opposite directions.
A chuck for surface treatment according to any one of claims 1 to 4.