JPH0324606Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a sandwich for holding and immersing a material to be treated in a treatment solution in electrolytic treatment of metal materials such as anodizing treatment of aluminum shapes. Regarding jigs.

(Prior art) Conventionally, for example, in the anodizing treatment of aluminum or aluminum alloy shapes (hereinafter referred to as aluminum shapes), a pair of conductive rods hanging from an anode beam is stepped, and both ends of the aluminum shape are suspended horizontally. As a clamping jig, a metal clamping frame having a substantially U-shape is fixed to a conductive rod, and a titanium, zirconium, steel, or aluminum fastening bolt screwed into one side of the U-shaped clamping frame and the other side A structure in which the end of an aluminum profile is clamped between a piece of aluminum is generally known (Japanese Utility Model Publication No. 49-4112, Publication No. 55245-56, etc.).
However, these conventional products use titanium and zirconium fastening bolts, which have excellent durability but are expensive, and those using steel fastening bolts are prone to electrolytic corrosion and Those using aluminum fastening bolts had the disadvantage that the bolt diameter became thinner due to erosion, making it impossible to tighten them.

(Problems to be solved by the invention) The purpose of the invention is to prevent electrolytic corrosion of the fastening bolts in the clamping jig.

(Means for solving the problem) In order to achieve the above purpose, the sandwiching jig of the present invention is
A steel fastening bolt is passed through a conductive fixed clamping plate fixed to the conductive rod and protruding forward, a movable clamping plate, and an electrically insulating plate arranged on the outside of the fixed clamping plate,
A nut is screwed onto the tightening bolt to clamp the end of the material to be treated between the fixed and movable clamping plates, and the movable clamping plate has at least an inner surface that is to be in contact with the material to be treated. The fixing bolt is provided with an electrically insulating layer, and the fastening bolt is covered with an insulating tube for electrically insulating at least between the fastening bolt and the fixed clamping plate. In this proposal, the above-mentioned "movable clamping plate having an electrically insulating layer at least on the inner surface that is in contact with the material to be treated" refers to a single plate having electrical insulation and clamping strength, This includes a reinforcing plate superimposed on the outer surface of a plate having an electrically insulating property but no clamping strength, and a thick plate with high clamping strength superimposed on the outer surface of a thin plate with electrical insulation but no clamping strength. An example in which the present invention is applied to a clamping jig used for electrolytic treatment of aluminum sections will be described below with reference to the drawings.

In FIG. 1, a jig 3 is placed between opposite sides of conductive rods 2, 2 hanging from both ends of the anode beam 1.
... are installed at a certain vertical interval, respectively, and each end of the aluminum profile m to be electrolytically treated is held between the opposing clamping jigs 3, 3, ... of both conductive rods 2, 2, respectively. It is set as.

The structure of the clamping jig 3 is as follows. 2nd, 3rd
In the figure, a base 5 of an aluminum fixed clamping plate 4 is fixed to one side of an aluminum conductive rod 2 having a rectangular cross section, and the clamping plate 4 protrudes forward at right angles, and the clamping plate 4 extends horizontally. It is a downward L-shaped piece consisting of a horizontal piece 6 and a vertical piece 7 hanging at right angles to the horizontal piece 6, and a through hole 8 is bored at the intersection of the horizontal piece 6. The other movable clamping plate 9 is the fixed clamping plate 4.
It is L-shaped, consisting of a horizontal piece 10 and a vertical piece 11, which are almost the same shape as the electric lamp. A reinforcing plate 13 made of a thin stainless steel plate with a smaller diameter than the clamping plate 12 is adhered to the outer surface of the insulating and clamping plate 12, and a through hole 14 is formed at a position corresponding to the through hole 8. It's open.

One end of an appropriately long insulating tube 15 made of an electrically insulating material such as vinyl chloride resin is fitted into the through hole 14 of the movable clamping plate 9 as described above, and the other end is insulated and the clamping plate 12 is insulated. The stainless steel reinforcing plate 13 of the movable clamping plate 9 is inserted into the insulating tube 15, and the tip of this bolt 16 is inserted into the through hole 8 of the fixed clamping plate 4. An electrical insulating plate 17, which is a thick plate made of the same material as the insulating/clamping plate 12 and has a through hole 18, is fitted onto the bolt protrusion on the outside of the clamping plate 4. A steel nut 20 is screwed together via a steel washer 19. The above insulation tube 15
In this example, the tip thereof is connected to the through hole 8 of the fixed clamping plate 4.
It is long enough to partially penetrate inside.

In use, for example, the web part w at the end of an aluminum profile m having a T-shaped cross section as shown in the second figure is inserted between the fixed clamping plate 4 and the movable clamping plate 9, and both flange parts f, f are inserted. The ends are brought into contact with the front surfaces of the vertical pieces 7 and 11 of both clamping plates 4 and 9, and in this state, the nut 2 is tightened.
0 to clamp and hold the web portion w between both clamping plates 4 and 9. When the conductive rods 2, 2, in which a large number of main sections are sandwiched horizontally in multiple stages in this manner, are immersed in an electrolytic solution and a current is applied to the conductive rods 2, 2 through the anode beam 1, the fixed clamping plate 4, a current flows through the aluminum profile m, and a predetermined electrolytic treatment is performed. In this case, the tightening bolt 16 is attached to the insulating tube 1 with respect to the fixed clamping plate 4.
5 and an electrically insulating plate 17, and the shape member m
is insulated by the insulating and clamping plate 12, thereby preventing electrolytic corrosion caused by electrolytic treatment.

Depending on the cross-sectional shape of the section to be clamped, the section pushed between the clamping plates 4 and 9 may be attached to the tightening bolt 16.
In this case too, the insulation tube 15 insulates the profile and the fastening bolt 16.

When the bolts 16 and nuts 20 are strongly tightened, there is a risk that the movable clamping plate 9 may tilt and be damaged. A stay plate 21 made of a certain synthetic resin or the like and having a thickness depending on the shape to be clamped is positioned between the clamping plates 4 and 9 on the side opposite to the shape clamping position.
The stay plate 21 of this example is a long one that extends to each clamping jig 3 on the conductive rod 2, and its upper end is suspended from the conductive rod 2 by a locking tool 22 (first
figure).

In the other embodiment shown in FIG. 4, both ends of the insulating tube 15a are partially fitted into the through holes 14a and 18a of the movable clamping plate 9a and the electrically insulating plate 17a, and the stay plate 21a
is approximately the same length as the vertical piece of the movable clamping plate 9a, and is fixed to the inner surface of the clamping plate 9a by adhesive or the like, and the other structures are substantially the same as those in FIGS. 1, 2, and 3.

Still another embodiment of FIG. 5 is a movable clamping plate 9b.
The inner and side end surfaces of the clamping plate 13b, which is made of a thick plate of stainless steel, are made of phenolic resin, hard vinyl chloride resin, fluororesin, polypropylene resin, and various other electrically insulating materials, with the thickness necessary for insulation. The insulating layer 12b is bonded,
Other structures are substantially the same as those in FIGS. 1, 2, and 3.

Another embodiment shown in FIG. 6 is an example in which the L-shaped fixed and movable clamping plates 9a (fixed clamping plates are not shown) are oriented upward.
The flange portions f, f of can be supported on the horizontal piece 10c.

The arrangement structure of the clamping jig to the plurality of conductive rods is the seventh
If they are attached in a staggered manner to two conductive rods 2d, 2d hanging in parallel from the anode beam 1d as shown in the figure, it is possible to prevent unevenness in the colored film during electrolytic coloring treatment or the like.

According to the proposed material clamping jig for electrolytic treatment,
It is possible to prevent electricity from being applied to the fastening bolts and nuts during electrolytic treatment, thereby improving durability by preventing electrolytic corrosion of the fastening bolts and nuts, and especially preventing collapse of the threads due to electrolytic corrosion. can be made,
In addition, during use, sufficient tightening can be achieved using steel fastening bolts and nuts.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. Figure 1 is a front view of an anode beam equipped with a clamping jig, Figure 2 is a partially enlarged perspective view of the clamping jig in a separated state, and Figure 3 is a partially enlarged perspective view of the clamping jig. 4 is a sectional view of another embodiment, FIG. 5 is a sectional view of another embodiment, and FIG. 6 is a side view of another embodiment. is a schematic side view of another usage example. 2, 2a, 2b, 2c, 2d... conductive rod, 3,
3a, 3b, 3c, 3d... pinching jig, 4, 4
a, 4b...Fixed clamping plate, 9, 9a, 9b, 9c
...Movable clamping plate, 12, 12a...Insulating and clamping plate, 12b...Electrical insulating layer, 15, 15a, 15
b...Insulating tube, 16, 16a, 16b, 16c...
...Tightening bolt, 17, 17a, 17b...Electric insulating plate, 20, 20a, 20b...Nut, m...
Aluminum profile.

Claims (1)

[Scope of Claim for Utility Model Registration] Steel fastening bolts are attached to a conductive fixed clamping plate fixed to a conductive rod and protruding forward, a movable clamping plate, and an electrically insulating plate arranged outside the fixed clamping plate. and a nut is screwed onto the tightening bolt to clamp the end of the material to be treated between the fixed and movable clamping plates, and the movable clamping plate is at least in contact with the material to be treated. An electrically insulating layer is provided on the inner surface of the clamping bolt, and the clamping bolt is covered with an insulating tube that electrically insulates at least between the clamping bolt and the fixed clamping plate. Ingredients.