JP2528065B2 - Carbon electrode of weather resistance tester - Google Patents

Description

Detailed Description of the Invention

[0001]

[Industrial applications] Japanese Industrial Standard (JIS) B 77
53 "Sunshine carbon arc lamp type weather resistance tester"
The light source part (light emitting part) of the weather resistance tester specified in
Carbon electrodes.

[0002]

2. Description of the Related Art JIS B In the light source part of the weather resistance tester specified by 7753 etc., a plurality of pairs of carbon electrodes are arranged vertically, and the size of the upper and lower carbon electrodes (hereinafter the same as the upper carbon and the lower carbon) depends on the continuous lighting time. Are defined in the following three types. Moreover, this upper carbon is generally provided with a concave screw portion on one end surface thereof. (1) Continuous lighting time of 22 hours or 24 hours Upper carbon: diameter of about 22 _mm or 23 _mm , length of about 305
_mm , 4 pieces are used. Lower carbon: diameter about 13 _mm or 15 _mm , length about 305
_mm , 4 pieces are used. (2) In case of continuous lighting for 60 hours Upper carbon: Diameter about 35 _mm or 36 _mm , length about 350
_mm , 4 pieces are used. Lower carbon: diameter of about 23 _mm , length of about 350 _mm , 4 pieces used. (3) In case of continuous lighting for 78 hours Upper carbon: diameter of about 36 _mm , length of about 410 _mm , 4 pieces used. Lower carbon: Approximately 23 _mm in diameter and 410 _mm in length, 4 pieces are used.

FIG. 4 shows JIS B This is the configuration of the light source unit (light emitting unit) 12 shown in 7753. In the figure, the upper carbon 1 has a cylindrical shape, and a convex screw portion 10 (not shown) provided on one end face thereof is provided on the upper carbon holder 3 to form a convex screw portion (not shown; see FIG. 6). The lower carbon 2 is hung vertically by being screwed into, and the lower carbon 2 has a cylindrical shape without any special processing, and is vertically held by being sandwiched by the lower carbon holder 4, and the central axes l of the upper and lower carbons are They are adjusted to match and form a pair, which is
By providing a pair, the lighting time is based on the above dimensions (1) to (3).

Also, the upper and lower carbon holders 3, 4
Are fixed to the upper holding table 13 and the lower holding table 14, respectively, and are adjusted by the carbon moving device 15 so that the upper and lower carbons are in the optimum positions. In addition, 16 and 17 are upper and lower protective plates for protecting the upper and lower carbon holders, and 18 is a filter having a predetermined transmissivity arranged around the carbon, and eight filters are attached to the filter frame 19. Has been.

Further, FIG. 5 is disclosed in Japanese Patent Application Laid-Open No. 1-222190, and is a partially cutaway sectional view of the upper carbon 1 and the upper carbon holder 3. In the figure, the groove 8 that fits into the protrusion 7 provided on the carbon holder 3 of the upper carbon of (1) to (3) above is indicated by the upper carbon 1
It is provided near the one end face of the above, and the projection 7 and the groove 8 are tightly fixed by a gripping mechanism (not shown) and suspended vertically. The lower carbon 2 and the lower carbon holder 4 are the same as described above.

Now, although it is not limited to the carbon electrode for use in the light source part of the weather resistance tester, it is not limited to the carbon black electrode 47-3.
In the 2059 publication, in order to use the carbon electrode to the end without waste, a screw thread is formed on both ends of the carbon electrode, and a recess or a protrusion having this thread is made of other carbon. It is described that a convex portion or a concave portion having a thread is screwed.

[0007]

Since the temperature of the weathering light tester when the carbon discharges exceeds several thousand degrees, it is not possible to burn the carbon to this holding part in order to protect the carbon holding device. No, I had no choice but to leave a part of the carbon. Therefore, in the carbon of the weather resistance tester, a portion (generally about 80 to 120) corresponding to about 1/3 to 1/4 of its total length (about 305 to 410 _mm ).
_mm ) had been discarded without being used.

[0008] In order to eliminate such waste, the above-mentioned actual publication 4
7-32059, "Recesses or protrusions are formed on both ends of a carbon electrode, and a protrusion or a protrusion having another carbon thread is formed on the recess or protrusion having the screw. When it is attempted to use the technique of "screw-fitting the recesses" to carbon of the weather resistance tester, the upper carbon holder 3 of the weather resistance tester generally has the concave screw portion 10 of the upper carbon 1 on the convex screw portion 9 thereof. Due to the screwed structure, the convex screw portion 9 of the upper carbon 1 is necessarily located on the opposite side of the upper carbon holder 3.
That is, as shown in FIG. 6, another carbon concave screw portion 10 is screwed into the downward convex screw portion 9.

Since the incomplete screw portion 11 is inevitably formed in the convex screw portion 9 in the process of manufacturing the convex screw portion 9, the convex screw portion 9 of the upper carbon 1 is concave when the convex screw portion 9 faces downward as shown in FIG. When the screw portion 10 is screwed, both carbons are not screwed at the position of the incomplete screw portion 11, and when discharge combustion progresses to the incomplete screw portion 11, this portion falls off in a ring shape. However, it is a cause of abnormal discharge or device failure as well as hindering discharge.

[0010] In addition, the weather resistance test is a long-term test of hundreds of hours.
Since the test is common, it is not necessary to change carbon during the test.
In order to save even a little, the maximum continuous burning time of the equipment is increased.
It is common to try to burn carbon. That
Therefore, the joining technique described in Japanese Utility Model Publication No. 47-32059 mentioned above.
Even when using, the length of carbon and
If there is no optimum relationship with the long burning period, carbon will be added frequently.
Will be exchanged, which will result in human waste
It couldn't be an effective technology.

Therefore, in the carbon electrode used in the weathering tester, a portion corresponding to about one-third to one-fourth, which was conventionally wasted, can be reused, and the test time can easily be the maximum test time of the apparatus. There has been a strong demand for the development of carbon that can carry out the above.

[0012]

In order to solve the above-mentioned problems, firstly, in a carbon electrode having one or more pairs vertically arranged as a light source of a weathering tester, an upper carbon electrode is provided near an end thereof. Around the periphery, there is a linear groove or a plurality of linear grooves that fits into the linear projection or a plurality of linear projections provided on a holder for holding and suspending this carbon electrode, and the end surface on the side of the linear groove is convex. The lower carbon electrode has a convex screw part formed on one end face and a convex screw part formed on the other end face. Form a concave screw part to which the shaped screw part is screwed, and the length of the upper and lower carbon electrodes is the carbon after the maximum continuous lighting time from the specified carbon length of the weather resistance tester except the convex screw part. A carbon electrode having a length obtained by subtracting the remaining length was used as a means.

Secondly, in addition to the above-mentioned first means, an adhesive agent in which carbon powder is mixed is applied to both end surfaces of the upper carbon electrode and the lower carbon electrode, either one end surface and both screw portions or either. The means was a carbon electrode which was applied to one of the screw parts to firmly fix it.

[0014]

[Action] By adopting the above means, the upper carbon
Is provided with a groove that fits into the protrusion provided on the holder.
Therefore, it is possible to suspend them vertically by fixing both
it can. Therefore, like the conventional holder, its convex screw part
Unlike the case where the carbon concave screw part is screwed into the
Provide a convex screw part at the end where the groove is provided.
Since it is possible to use another carbon convex
The shaped screw portion can be screwed. Therefore, the convex screw part
The incomplete screw part that is inevitably generated in the
When this part burns by electric discharge,
Since the screw part of the part is screwed, it does not come off in this part.
I don't know.

Further, the total length of the upper and lower carbons is obtained by subtracting the length corresponding to the length of the residual carbon after the maximum continuous lighting combustion from the total length of the conventional carbon (for example, the total length of the JIS specified carbon). By doing so, the upper carbon is screwed into the new carbon concave screw part that fixes the carbon residue of the combustion residue to the new carbon concave screw part, and the lower carbon is the new carbon convex screw part. It is possible to make the carbon length substantially the same as the carbon length of the weather resistance tester that has been conventionally used by screwing with the concave carbon screw of the residual carbon.

Further, when the carbon residue after combustion is screwed, by using an adhesive agent mixed with carbon powder at the screwed portion or the end surface of the carbon, the discharge voltage current, the burning speed, and the spectral energy can be obtained. The screwed portion can be tightly adhered to each other without changing.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the upper carbon 1 and the lower carbon 2 of the present invention.
Are attached to the upper carbon holder 3 and the lower carbon holder 4, respectively, and FIG. 2 is a cross-sectional view of the main parts. FIG. 2 shows the upper and lower residual carbons 5 and 6 after the upper and lower carbons 1 and 2 in FIG. In this state, only a pair of them is shown, and FIG. 3 is a view in which the residual carbons 5 and 6 of FIG. 2 are screwed into the upper and lower carbons 1 and 2 of FIG. 1, respectively.

The upper carbon 1 has a cylindrical shape, and a strip groove 8 for fitting with the protrusion 7 of the upper carbon holder 3 is provided around one end of the upper carbon 1, and a convex groove is formed at this end. A screw portion 9 is provided. A concave screw portion 10 is provided at the other end. Similarly, the lower carbon 2 is also cylindrical and has no groove, and is provided with a convex screw portion 9 at one end and a concave screw portion 10 at the other end.

Here, the upper and lower carbons 1, 2
The total length of B If the diameter is the same as the unused upper and lower carbons specified in 7753, the length corresponding to the length of the remaining carbons 5 and 6 (about 80 to 120 _mm ) after the maximum continuous lighting combustion of the device from its total length Minus about 185 _mm to 225 _mm for 24 hours of carbon, and about 230 _mm to about 2 for 60 hours of carbon.
70 _mm , 78 hours of carbon from about 290 _mm to about 33
It becomes 0 _mm .

Next, JIS B The specific shape and operation of the case where 7753 is satisfied for the prescribed continuous lighting of 78 hours will be described.

The outer dimensions of the upper carbon 1 are about 320 _{mm in} length a excluding the convex screw portion 9, the diameter is about 36 _{mm which} is the same as the above JIS, and the length b of the lower carbon is measured in the same manner as the upper carbon. Is about 320 _mm , and the diameter is about 23 _{mm, which} is the same as the above JIS.
Is. The diameter of the convex screw portion 9 of the upper carbon 1 is about 24 _mm , the height is about 7 _mm , and the pitch is about 3 _mm , and the center thereof coincides with the center of the upper carbon 1. Line groove 8 provided around
Is about 10 _mm away from the end and is on a plane orthogonal to the central axis 1 of the upper carbon 1 and has a width of about 8 _mm and a depth of about 4 _mm.
Has become. The concave screw portion 10 at the other end has a diameter, a depth, and a pitch with which the convex screw portion 9 is screwed. The convex screw portion 9 of the lower carbon 2 has a diameter of about 16 _mm and a height of about 7 _mm .
_mm, a pitch of about 2 _mm, concave threaded portion 10, the diameter of the convex thread portion 9 is screwed, depth, and pitch.

[0022] Using these upper and lower carbons 1, 2
To operate the weather resistance tester for 78 hours, (1) As shown in FIG.
Firmly fixed to the upper and lower carbon holders respectively, immediately
The upper carbon 1 is the protrusion 7 of the upper carbon holder 3.
The groove 8 is fitted to and is firmly fixed by a gripping mechanism (not shown).
I do. Also, the lower carbon 2 is used as the lower carbon holder 4.
Securely fit and fix. Only once in this state, 52
Burn for time (light emission). The lower carbon of this example
The holder 4 is not shown in detail, but the bottom 4 carbons 2
A pair of books is set and fitted into the fitting part and fixed.
You. (2) When the combustion for 52 hours is completed, the state shown in FIG. 2 is obtained.
At this time, the total length c of the upper residual carbon 5 and the lower residual carbon 6
Length d is about 90_mmIs. (3) Next, remove the upper and lower residual carbons 5 and 6 in FIG.
Removed, unburned upper and lower carbons 1, 2 (see Figure 1
As shown in Fig. 3, screw it onto the upper and lower carbons shown.
Firmly attach the upper and lower carbon holders 3 and 4
wear. At this time, screw the upper and lower residual carbons 5 and 6
The lengths e and f of the combined upper and lower carbons are approximately
410_mmTherefore, the length is almost the same as the JIS standard.
Become. In this state, it is possible to burn for 78 hours. (4) After the completion of 78 hours, the upper part of the same state as in Fig. 2 is reached.
And the bottom residual carbons 5 and 6 will remain.
The bon is screwed onto the unburned carbon as in (3). (5) By repeating (3) and (4) below,
Use the upper and lower residual carbons 5 and 6 during the next combustion.
78 hours of testing will be possible.

When the unburned upper carbon screwed with the residual carbon is attached to the upper carbon holder 3 as shown in FIG. 3, the incomplete screw portion 11 of the convex screw portion 9 is screwed downward. Since it is located, even if combustion proceeds to this portion, the upper portion is screwed, so that this portion does not fall off. Further, as a matter of course, since the lower carbon is not suspended, the incomplete screw portion 11 does not fall off.

Although not shown, when the residual carbon is screwed onto the unburned carbon in the above (3), if an adhesive or the like is applied to the screwed portion, the screwed portion can be more strongly joined. . As an example of this, for example, when an adhesive made by adding about 17 parts by weight of a phenolic adhesive to about 83 parts by weight of carbon powder and mixing it was applied to the screwed part, the screwing strength was about doubled. Further, when this adhesive was used, the discharge voltage and current were within the ranges of 48 to 52 V and 58 to 62 A specified by JIS, and the burning time and the spectral energy did not change.

[0025]

【effect】 FIG. 8 is described in JP-A 1-2221890.
It is an explanatory view when using conventional carbon, in the figure
The residual carbon in the lower and upper parts of (2) is as described above.
About 1/3 to 1/4 of the unused carbon of (1)
It was of comparable length and had all been discarded. or,
Similarly, FIG. 7 uses the upper and lower carbons of the present invention.
It is an explanatory view of the case, the bottom of the (2) in the figure and the residual
Carbon is screwed to each unused carbon as shown in (3).
And then use again.

Therefore, according to the present invention, a portion corresponding to about one-third to one-fourth of the carbon for a weather resistance tester has not been conventionally used to protect the carbon holder. The waste that has been discarded can be eliminated and the cost required for its disposal can be eliminated, and resource-saving and economical carbon can be provided.

[Brief description of drawings]

[Figure 1] Retaining the upper and lower carbons of the present invention
FIG. 3 is a cross-sectional view of a main part configuration when attached to a tool.

FIG. 2 The upper and lower residue after burning for a predetermined time in Fig. 1
The figure which shows carbon.

FIG. 3 The residual carbon of FIG. 2 is replaced with the upper and lower carbs of FIG.
Figure screwed on the connector.

FIG. 4 Configuration of the main part of the light source part of the JIS standard weather resistance tester
FIG.

[Figure 5] Destruction of essential parts when conventional carbon is attached
Face view.

[Figure 6] Conventional connection-type carbon is used as a car for weather resistance tester.
An imaginary figure when applied to Bonn.

FIG. 7 is an explanatory diagram when the carbon of the present invention is used.

FIG. 8 is an explanatory view when using conventional carbon.

[Explanation of symbols]  1 Upper carbon  2 Lower carbon  Three Upper carbon retainer  4 Lower carbon holder 5 Upper residual carbon 6 Lower residual carbon 7 Protrusion 8 Groove 9 Convex screw part 10 Recessed screw part 11 Incomplete screw part 12 Light source

Claims (2)

(57) [Claims] 1. A carbon electrode arranged in one or a plurality of pairs vertically as a light source of a weather resistance tester, wherein an upper carbon electrode is a holder for holding and suspending the carbon electrode around a periphery near an end thereof. Is provided with a linear groove or a plurality of linear grooves that fit into the linear projection or a plurality of linear projections, and a convex screw portion is formed on the end surface on the side of the linear groove, and a convex screw portion is formed on the other end surface. Form a concave screw part that is screwed, and the lower carbon electrode forms a convex screw part on one of its end faces, and forms a concave screw part on which the convex screw part is screwed on the other end face, Further, the lengths of the upper and lower carbon electrodes are set to a length obtained by subtracting the remaining carbon length after the maximum continuous lighting time from the predetermined carbon length of the weather resistance tester, excluding the convex screw portion, and the convex shape of the upper remaining carbon. The screw part is the concave screw part of the upper carbon,
A carbon electrode for a weather resistance tester, wherein the convex screw portion of the lower carbon is screwed into the concave screw portion of the residual carbon in the lower portion. 2. An adhesive mixed with carbon powder is applied to both end faces of the upper carbon electrode and the lower carbon electrode, either one end face and both screw parts or one screw part, and discharge voltage current, The carbon electrode for a weather resistance tester according to claim 1, wherein the carbon electrode is firmly fixed without changing the burning rate and the spectral energy.