受験番号：36IPM027
問１．
[0006]
With regard to the above-described ceiling section structure of the conventional
fluidization roasting furnace, it becomes impossible to support full weight of refractory bricks
serving as the ceiling section structure as the irregular bricks 8, the cylindrical side plate, and theshelf boards 9 attached to the uppermost portion of the cylindrical side plate deteriorate with age,
and it becomes necessary to newly produce the whole fluidization roasting furnace.
[0007]In addition, with regard to the labyrinth function that is possessed by the irregular bricks8 of the conventional fluidization roasting furnace and that is a function to prevent internal
combustion gas from being discharged from the inside of the fluidization roasting furnace to theatmosphere, joint spaces between bricks widens and the labyrinth function deteriorates drasticallyas the irregular bricks 8 deteriorates with age.
[0008]The present invention aims to overcome such problems that the conventional ceiling
section structure has, and an object of the present invention is to continuously perform thelabyrinth function that is a function to prevent internal combustion gas from being discharged fromthe inside of the fluidization roasting furnace to the atmosphere, with no need to newly produce
the whole fluidization roasting furnace in a case where the irregular bricks 8, the cylindrical sideplate 10, and the shelf boards 9 attached to the uppermost portion of the cylindrical side plate 10of the fluidization roasting furnace deteriorate with age.

問２．
[0038](1) Sharpening Process
A first base material 11 used in the present embodiment is a steel plate material such as
SK steels. A flat bar having an appropriate area corresponding to the size of a blade 1 to be
produced is prepared as the first base material 11. The number of the flat bar necessary toobtain the single blade 1 may be one, but in the present embodiment, two rectangular flat bars,
that is, a first flat bar 11A and a second flat bar 11B are used as illustrated in FIG. 3A and FIG. 3B.
Note that, here, the first flat bar 11A and the second flat bar 11B are together referred to as a flatbar 11A (11B) since a process of forming a cutting edge portion 17 on the first flat bar 11A is thesame as a process of forming the cutting edge portion 17 on the second flat bar 11B.

[0039]Before forming the cutting edge portion 17, the flat bar 11A (11B) is a rectangular platematerial having a constant thickness as illustrated in FIG. 2A. A sharpening process is a processof forming the cutting edge portion 17 by processing the plate material. In other words, in thesharpening process, the cutting edge portion 17 is formed by performing a process of sharpening
the flat bar 11A (11B) from a middle portion to one end in a width direction as illustrated in FIG.
2B.
[0040]
The flat bar 11A (11B) subjected to the sharpening process has a base portion 16 andthe cutting edge portion 17.

The base portion 16 has the constant thickness, but the cuttingedge portion 17 gets thinner as getting farther away from the base portion 16 (in other words, thecutting edge portion 17 gets thinner toward an outside in the width direction of the flat bar 11A(11b)). The cutting edge portion 17 has a cutting edge 17a on its tip. The cutting edge portion
17 has a double bevel, which is obtained by processing both side edges of the flat bar 11A (11B).
In other words, the cutting edge portion 17 has the tip (cutting edge 17a) that is substantiallyaligned on a middle line of the flat bar 11A (11B), the middle line dividing the flat bar 11A (11B)
almost in half in the thickness direction.
[0041]
Examples of the method of sharpening the flat bar 11A (11B) include a method of
grinding one of the side edges by using an abrasive grinding wheel, a method of squashing the flatbar 11A (11B) into a thin shape by applying pressure on one of the side edges through forging orthe like.
[0042](2) Heat Treatment Process and Grinding Process
After the sharpening process, the flat bar 11A (11B) is subjected to a heat treatment
process.

Examples of the heat treatment process include quenching and tempering.

The

quenching is rapid cooling of the flat bar 11A (11B) from a high-temperature state.

The

tempering is reheating of the quenched flat bar 11A (11B).
[0043]
After the heat treatment process, the cutting edge portion 17 is ground again to be
sharpened more. This is because the tip (cutting edge) of the cutting edge portion 17 becomes
dull due to the above-described heat treatment process and it is necessary to make the cuttingedge sharp again after the heat treatment process. At this time, a sharpening stone with a finer
grit that the abrasive grinding wheel is desirably used.

問３．
WHAT IS CLAIMED IS:
1.

A timepiece with a lunar location/age display mechanism, the timepiece comprising:a planisphere plate (4) that is a disc displaying major stars and constellations, that isdriven by a timepiece mechanism while its rotation axis is a celestial north pole direction or acelestial south pole direction, that rotates in synchronization with diurnal motion of starts, andthat displays
ecliptic (4a) having an eccentric ring-like shape,
dates in a year indicating a position of the sum on the ecliptic, anda zone (4b) indicating a track of a moving moon near the ecliptic (4a); anda moon plate (3) that rotates at a predetermined rotation ratio relative to the planisphereplate (4), and that displays, on its circumference,an index (3a) indicating a lunar location within the zone where the moon may
exits, anda lunar age (3b) depending on the date.
2.

The timepiece with the lunar location/age display mechanism according to claim 1,wherein
the zone indicating a track of a moving moon is displayed in the zone (4b) that has aband-like shape and that has a predetermined width inside/outside the ecliptic(4a), andthe index (3a) indicating the lunar location on the moon plate (3) has a predeterminedangular width with respect to a center of the moon plate (3).