JPS6344682Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electrode attachment device for fan heaters, FF hot air heaters, etc.

Prior Art Fan heaters, FF hot air heaters, etc. are generally equipped with various electrodes such as ignition electrodes or flame rods. Conventionally, this electrode is made by inserting an electrode 2 into a substrate 1 such as a burner case, as shown in FIG _.
It is attached to the substrate 1 by inserting it into the through hole 4 of the base hole 1 and fixing the other end attachment piece 3 _b with the screw 5 .

Here, the prismatic portion 2 _a of the electrode 2 and this prismatic portion 2 _a
A clearance T is created between the mounting bracket 3 and the square column holding piece _3a . That is, electrode 2
Since the square column part _2a is an insulator, its dimensional tolerance is large, and even if there is such a dimensional tolerance, in order to be able to fit the square column part holding piece 3a of the mounting bracket ₃ into the square column part _2a , it is natural that both There is a clearance between them.

Problems to be Solved by the Invention In such a conventional structure, the electrode 2 sometimes swings as shown in FIG. 6 when it is attached, and there is a problem in that it cannot be attached accurately. For example, the dimension A of the prismatic part 2 _a is 9 mm ^±0.3 , and the prismatic part holding piece 3
Dimension B of _a is 9.3mm ^±0.2 , corner RC of square column part 2 _a is 0.2mm,
If the length D of rod 2 _b is 33 mm, the maximum deflection angle θ at the tip of rod 2 _b will reach approximately 8 degrees in calculations. As a result, the most important position of the rod tip will be far from the specified position. This causes serious problems such as ignition failure in the case of ignition electrodes and failure in combustion detection in the case of flame rods.

This idea was created in view of these points.
The purpose is to allow accurate attachment of electrodes.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is configured such that the mounting pieces provided on both sides of the prismatic part of the mounting bracket are tilted upward, and the inclined mounting pieces are attached to the board. It has been done.

Function: When the mounting piece of the mounting bracket is attached to the board using the above-described configuration, the prismatic presser piece of the mounting bracket deforms into a chevron shape, causing the prismatic presser piece to rise. The wall portion deforms inward, that is, toward the prismatic portion of the electrode, and there is no clearance between the prismatic portion of the electrode and the prismatic portion presser piece of the mounting bracket. Therefore, the electrode does not shake and can be installed accurately.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Reference numeral 11 denotes a substrate such as a burner case to which an electrode is attached, and a locking hole 13 is provided on both sides of a hole 12 through which the electrode is inserted. A screw hole 14 is formed. 15
is an electrode to be attached to the substrate 11, and is constructed by protruding a rod _15c from the upper end of an insulator consisting of a prismatic portion _15a and cylindrical portions _15b , _15b connected above and below the prismatic portion 15a. _b is the hole 1 of the substrate 11
2 and held on the board 11. 16
is a mounting bracket for fixing the electrode 15 to the substrate 11, which includes a rectangular column holding piece 17 having a notch _17a for rod insertion and a hole _17b connected to the notch 17a;
Attachment pieces 1 provided on both sides of this prismatic part holding piece 17
8 _a and 18 _b , and a screw insertion hole 19 is formed in one of the mounting pieces 18 _b . The mounting pieces _18a and _18b on both sides of the mounting bracket 16 are slanted upwards as shown in FIG.

This mounting bracket 16 is first inserted into the upper cylindrical portion 15 _b of the electrode 15 through a hole 17 _b provided in the prismatic portion holding piece 17 , and the prismatic portion holding piece 17 is fitted into the prismatic portion 15 _a of the electrode 15 . Then, one of the next mounting pieces 18 _a is inserted into the locking hole 13 of the board 11 , and the other mounting piece 18 _b is tightened and fixed into the screw hole 14 of the board 11 with the screws 20 .

The mounting bracket 16 mounted in _this manner has a _{hole 17b} as shown in FIG. As a result, the prismatic portion presser piece 17, which is the weakest in terms of strength, deforms into a mountain shape, and the lower end of the rising wall portion _17a of the prismatic portion presser piece 17 is connected to the electrode 15 as shown by arrow A.
moves toward the prismatic portion 15 _a and comes into contact with the prismatic portion 15 _a . Therefore, the clearance T between the prismatic portion holding piece 17 of the mounting bracket 16 and the prismatic portion _15a of the electrode 15 becomes zero, so that the electrode 15 can be installed accurately without swinging from side to side as shown in FIG. Become.

Furthermore, in this embodiment, one mounting piece _18a of the mounting bracket 16 is inserted into the locking hole 13 provided in the board 11, and only the other mounting piece _18b is secured with screws, making the installation process easy. It has the advantage that it can be done.

Effects of the invention As described above, by slightly changing the shape of the mounting bracket of the invention, the electrode can be easily stopped from steadying and can be mounted accurately. In particular, it works effectively even for items with large dimensional variations such as insulators, so there is no need to be concerned about the dimensional relationship between mounting brackets and electrodes, which improves productivity and ease of assembly. There is something big.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an electrode mounting device according to one embodiment of the present invention, FIG. 2 is an assembled perspective view thereof, and FIG.
FIG. 4 is a cross-sectional view taken along line X--X of FIG. 3;
FIG. 5 is a cutaway perspective view of a conventional electrode mounting device;
The figure is an explanatory diagram of the function. 11: substrate, 15: electrode, _15a : prism portion, _15b : cylindrical portion, _15c : rod, 16:
...Mounting bracket, 17... Square column retainer, 17 _b ...
Hole, _18a , _18b ...mounting piece portion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An electrode comprising a rod protruding from the cylindrical part of an insulator consisting of a prismatic part and a cylindrical part, and a mounting bracket for attaching the electrode to a substrate such as a burner case, and the above-mentioned mounting bracket consists of a square-shaped prismatic holding piece with a hole into which the cylindrical part of the electrode is inserted, and upwardly inclined mounting pieces located on both sides of the prismatic holding piece, and this mounting piece is attached to the substrate. Electrode mounting device with fixed electrodes. (2) The electrode mounting device according to claim 1, wherein one of the mounting pieces is inserted into a through hole provided in the substrate, and the other mounting piece is fixed to the substrate with screws.