JP2899248B2 - Tea mortar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tea mill suitable for producing matcha by powdering tea leaves.

[0002]

2. Description of the Related Art An example of a conventional tea ceremony is shown in FIG. A straight cutting blade is engraved on the upper conical surface 01a of the vertex angle θ formed on the upper part of the stone lower mill 01. A linear cutting blade is also formed on the lower conical surface 02a of the vertex angle θ formed below the stone upper mill 02.

When the upper mill 02 is placed on the lower mill 01, the lower mill
The tip of a shaft 03 that is implanted at the center of 01 and protrudes upward is inserted into a hole 04 formed in the center of the lower surface of the upper mill 02, and the upper mill 02
Of the lower mill 01 abuts on the upper conical surface 01a of the lower mill 01.

[0004] While grasping a handle 05 which is implanted on the periphery of the upper mill 02 and extends upward, the upper mill 02 is slowly rotated around an axis 03 while a recess 06 formed in the center of the upper surface of the upper mill 02 is formed. When the tea leaves 07 stored in the bottom mill 08 are put into the bottom hole 08 by a small amount of the fingers 09, the tea leaves 07 are moved to the upper conical surface 01a of the lower mill 01 and the upper mill 02.
Into the gap with the lower conical surface 02a, and in the process of moving in the outer circumferential direction in the gap, are cut and crushed by the cutting blades engraved on these conical surfaces 01a and 02a to form the tea powder 010, and From the outer peripheral edge of

[0005]

The conventional tea ceremony is a lower mortar.
Because both 01 and 02 were made of stone, the lightest tea ceremony weighed 30 kg, making it difficult to carry. And since the upper mill 02 is heavy, it takes a lot of labor to turn the handle 05, and the tea leaves 07 have to be put into the bottom hole 08 little by little with the fingers 09, so that there is a problem that both hands work.

Further, since the lower mill 01 and the upper mill are made of stone, their cutting edges are easily worn out. Further, since both of these cutting edges are straight cutting edges, the tea leaves 07 are efficiently cut and crushed. In addition, the tea leaves 07 in the gap cannot be forcibly transferred to the outer peripheral side. Therefore, it takes a long time for the milling operation, and since a large amount of the tea powder 010 remains in the gap between the cutting blades, a small amount (2 to 3 g) of the tea leaves 07 required for one coffee per person is required.
It was impossible to mill only.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the present invention is to place an upper mill on a lower mill, A number of cutting blades engraved on the upper conical surface by rotating the upper mill around its central vertical axis while supplying tea leaves to the gap between the upper conical surface and the lower conical surface of the upper mill In a tea mill for cutting and crushing tea leaves with a large number of cutting blades engraved on the lower conical surface, a bottom hole vertically penetrating the upper mill at a peripheral edge of a bottom of a pocket formed at a central portion of an upper surface of the upper mill. The guide cutter is non-rotatably supported in the pocket, and the outer peripheral surface of the guide that projects obliquely from the outer peripheral surface of the guide cutter is in contact with the inner surface of the pocket, and the lower end of the guide is Insert the formed cutting blade into the pocket In Xaus, characterized in that is spliced to the bottom surface.

Another feature is that the guide cutter is wedge-mounted on an upper portion of a shaft fixed to the lower mill and extending upward through the upper mill, and an adjusting screw screwed into an upper end of the shaft. The guide cutter is pressed against the bottom surface of the pocket by the elastic force of a coil spring interposed between the screw and the guide cutter.

[0009]

[0010]

[0011]

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. The steel lower mill 1 is provided with a disk-shaped pedestal 1A and a cylindrical die 1B extending upward from the center thereof. A conical surface 2 having an apex angle θ ₁ formed on the upper part of the die 1B is shown in FIG.
As shown in FIG. 5A and FIG. 5, a large number of cutting blades 3 are curved in an arc from the center to the outer peripheral edge.

A plurality of legs 4 are mounted at equal intervals in the circumferential direction on the periphery of the lower surface of the base 1A, and an annular powder receiving groove 5 is formed on the upper surface of the base 1A so as to surround the die 1B. ing.
At the bottom of the powder receiving groove 5, a single dust discharging hole 6 is formed which penetrates the pedestal 1A up and down. A hole 7 penetrating vertically through the center of the lower mill 1 is formed, and a shaft 8 is inserted into the hole 7 from a lower opening thereof and fixed to the lower mill 1 by bolts 22.

The steel upper mill 10 has a disk-shaped flange 10A and a cylindrical die 10B extending downward from the center of the lower surface thereof.
Linear multiple cutting edges extending from the center as shown in FIG. 3 (B) and FIG. 5 is the conical surface 11 of the apex angle theta ₁ with an upwardly convex formed in the lower portion of the die portion 10B in the radial direction 12 are engraved.

A pocket 13 is provided at the center of the upper surface of the flange 10A.
Is formed, and the base end of the handle 14 is screwed to the outer peripheral surface. Then, a bottom hole 15 is formed in the periphery of the bottom of the pocket 13 so as to penetrate the mill part 1B in the vertical direction, and the conical surface 11 extends along the anti-rotation direction of the upper mill 10 as shown in FIG. A wedge-shaped concave groove 16 whose depth gradually decreases from the bottom hole 15 is formed.

A hole 20 is formed in the center of the mill 10B so as to penetrate the mill 10B up and down. The lower end of the flange 10A is screwed with an upper end of a dust collecting rod 21.

When the upper mill 10 is placed on the lower mill 1, the shaft 8 extends upward through the hole 20, and the lower conical surface 11 of the upper mill 10 comes into contact with the upper conical surface 2 of the lower mill 1. , And the milling rod 21 is the mortar 1B
, And both sides and the bottom surface of the powder receiving groove 5.

Next, the guide cutter 23 is placed in the pocket 13.
The guide cutter 23 is wedge-fitted to the shaft 8 by engaging a square hole 24 formed in the center thereof with a square surface portion 25 formed on the upper portion of the shaft 8.

Thereafter, a coil spring 27 is inserted into a bottomed hole 26 formed in the center of the upper surface of the guide cutter 23, and an adjusting screw 29 is screwed into a screw thread 28 formed at the upper end of the shaft 8. Then, the upper end of the coil spring 27 abuts on the lower surface of the adjusting screw 29, the lower surface of the guide cutter 23 presses against the bottom surface of the pocket 13 by the resilience of the coil spring 27, and the upper mill 10 contacts the lower mill 1. Pressed toward.

The outer peripheral surface of the guide 30 projecting from the outer peripheral surface of the guide cutter 23 and inclined at an angle α to the horizontal plane abuts on the inner surface of the pocket 13, and a cutting blade formed at the lower end of the guide 30 31 touches the bottom of the pocket 13. A cover 32 covers the pocket 13, the adjusting screw 29, and the like, a cover 33 covers the powder receiving groove 5, the dust collecting rod 21 and the like, and a dust discharging hole 6
It is a powder saucer installed under.

When this tea ceremony 100 is used, it is placed on a horizontal table 35 and the powder receiving tray 34 is placed below the powder discharge hole 6.
Then, the lid 32 is removed and the desired amount of tea leaves 36 is filled in the pocket 13. Note that the lid 32 removed in place of the powder pan 34 may be placed under the dust discharge hole 6.

Then, holding the handle 14 and moving the upper mill 10 to the shaft 8
Slowly rotate around in the direction of the arrow. Then, the tea leaves 36 in the pocket 13 are transported downward by the guide 30 of the guide cutter 23 and enter the bottom hole 15 little by little.
The long stem that can not fit is the blade 31 at the lower end of the guide 30 and the bottom hole 15
Between the sharp corners of the inlet.

The tea leaves 36 having passed through the bottom hole 15 are smoothly fed through the wedge-shaped concave grooves 16 into the gap between the conical surfaces 2 and 11, and are moved in the outer circumferential direction by the straight cutting edges 12 and the arc-shaped cutting edges 3. In the process of being transferred to the mash, it is cut and crushed into fine tea powder 39.

The tea powder 39 falls from the outer peripheral end of the gap into the powder receiving groove 5, and the tea powder 39 attached to the outer peripheral surface of the mortar portion 1B, both side surfaces and the bottom surface of the powder receiving groove 5 is removed from the upper mill 10 Is scraped off by the dust collecting rod 21 which rotates together with the
And enters the powder receiving tray 34.

Since the lower mill 1 and the upper mill 10 are both made of hardened steel, and the lower mill 1 is held in the air through the plurality of legs 4, the conical surfaces 2, 11 The formed cutting edges 3 and 12 and the heat generated by friction between them and the tea leaves 36 are easily dissipated into the atmosphere by heat conduction and heat radiation. The cutting blades 3 and 12 are hard and hard to be worn, so that they can be used semi-permanently without impairing the cutting quality.

Since the pressing force toward the lower mill 1 of the upper mill 10 can be adjusted by adjusting the amount of screwing of the adjusting screw 29, the upper mill 10 can be turned with a small force, and the entire tea mill 100 can be rotated. Can be lightened so that it can be easily carried.

Further, as shown in FIG.
Extends radially from the center, and the cutting edge 3 of the lower mill 1 has an arc shape that curves concavely with respect to the rotation direction of the upper mill 10 indicated by the arrow, so that the cutting blade 12 and the cutting blade 3 come into point contact with each other, Cutting edge near the center
The force P7 acting on 12 and the force P8 acting on the cutting blade 3 are opposite in direction and equal, but the force acting on the cutting blade 12 as it approaches the outer circumference
F7 and the force F8 acting on the cutting edge 3 are equal, but the angle between them is gradually reduced, and the resultant force F9 is directed toward the cutting edge 3. Accordingly, the tea leaves 36 entering the gap between the conical surfaces 2 and 11 are forcibly discharged to the outer peripheral side along the cutting edge 3 by the force F9.

Further, since the tea powder 39 in the gap is forcibly discharged and the wedge-shaped concave groove 16 is formed in the conical surface 11, the tea leaves 36 in the pocket 13 pass through the bottom hole 15 and enter the gap. Supplied smoothly. Therefore, the tea leaves 36 can be powdered in a short time, and the temperature and the temperature of the tea leaves 39 can be prevented from being impaired due to the rise in the temperature while the tea leaves 39 stay in the gaps.

Further, the tea powder 39 adhering to the outer peripheral surface of the mortar portion 1B, both side surfaces and the bottom surface of the powder receiving groove 5 is scraped off by the dust collecting rod 21, and is collected and passed through the powder discharging hole 6 to receive the powder receiving tray. Since the tea leaves 39 are contained, the amount of the tea powder 39 remaining inside the tea ceremony 100 becomes extremely small, and therefore, even a small amount of the tea leaves 36 can be milled.

Since the tea cereal 100 according to the present invention has a total weight of about 3 kg, it can be easily carried and put on a Japanese-style table in a Japanese-style room for milling. And 2-3g to 10g of tea leaves 36 required for one coffee
Can be milled in a short time of 0.5 to 2 minutes.

As compared with the conventional one shown in FIG. 6, the tea whisk 100 of the present invention has a size of 1/3, a weight of 1/10 and a weight of 1/10.
The milling volume per hour is 10 times, and the calorie required for the milling operation is 1/100 or less. In addition, it goes without saying that the tea ceremony 100 of the present invention can be used for herb and other milling.

[0032]

According to the present invention, the heat generated by the cutting blades of the lower mill and the upper mill or by friction between them and the tea leaves is efficiently radiated from the lower mill and the upper mill to the atmosphere by heat conduction and heat radiation. In addition, the cutting blades are hard and hard to wear, so that the tea cereal can be used semi-permanently.

Since the upper mill can be pressed toward the lower mill with an arbitrary force, the abrasion can be reduced without impairing the sharpness of the cutting blade. In addition, since the weight of the upper mill can be reduced and the upper mill can be turned with a small force, and further, the weight of the entire tea mill can be reduced, so that it can be easily carried and installed on a Japanese-style table in a Japanese-style room. It can be used.

The cutting blade engraved on the lower conical surface of the upper mill is a straight blade extending radially from the center, and the cutting blade engraved on the upper conical surface of the lower mill is rotated with respect to the rotation direction of the upper mill. If the blades are curved in a concave shape, the tea powder cut and crushed by the cutting blades can be discharged in a short period of time. Since the tea leaves can be smoothly supplied to the gap between the conical surface and the upper conical surface, the tea leaves can be efficiently pulverized in a short time.

A bottom hole is formed in the periphery of the bottom of the pocket formed in the center of the upper surface of the upper mill so as to penetrate the upper mill vertically, and a guide cutter is supported in the pocket so as not to rotate. If the outer peripheral surface of the guide projecting obliquely from the outer peripheral surface is attached to the inner surface of the pocket and the cutting blade formed at the lower end of this guide is attached to the bottom surface of the pocket, the tea leaves filled in the pocket can be removed. The guide can be automatically supplied to the bottom hole, and the long stem of tea leaves can be cut into the bottom hole by the cutting blade at the lower end of the guide and the sharp corner at the entrance of the bottom hole.

A guide cutter is wedge-attached to the upper part of a shaft fixed to the lower mill and extending upward through the upper mill, and is interposed between the guide screw and an adjusting screw screwed into the upper end of the shaft. If the guide cutter is pressed against the bottom surface of the pocket by the elastic force of the coil spring, the guide cutter can be easily supported in the pocket so that it cannot rotate, and the cutting edge at the lower end of the guide can easily contact the bottom surface of the pocket. Further, the pressing force of the upper mill on the lower mill can be easily adjusted by adjusting the screwing amount of the adjusting screw.

A dust discharge hole is provided at the bottom of an annular powder receiving groove formed in the lower mill near the die portion, and a powder tray is installed below the dust discharge hole, and attached to the lower surface of the upper mill. When the powder collecting rod extending downward is brought into contact with the outer peripheral surface of the mortar portion, both side surfaces and the bottom surface of the powder receiving groove, the tea powder discharged from the gap between the lower conical surface and the upper conical surface can receive the powder. It can be dropped inside and the powder on the outer peripheral surface of the mortar, both sides and the bottom of the powder receiving groove is scraped off with a powder collecting rod, and it is scraped and automatically collected into a powder receiving tray through a powder discharging hole. You can enter.
Therefore, the amount of tea powder remaining in the inside of the tea mill can be reduced, so that a small amount of tea leaves can be easily pulverized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIGS. 2A and 2B show a lower mill of the embodiment, wherein FIG. 2A is a schematic top view and FIG.

3A and 3B show an upper mill of the embodiment, wherein FIG. 3A is a schematic longitudinal sectional view, FIG. 3B is a bottom view taken along the line BB of FIG. 3A, and FIG.
It is sectional drawing which follows the CC line of FIG.

4A and 4B show the guide cutter of the embodiment, wherein FIG. 4A is a top view, and FIG. 4B is a view taken along the arrow BB of FIG.

FIG. 5 is an explanatory diagram for explaining a force acting on the cutting blade of the embodiment.

FIG. 6 is a schematic vertical sectional view of a conventional tea ceremony.

[Explanation of symbols]

 100 Tea mill 1 Lower mill 1A Pedestal 1B Mortar 2 Upper conical surface 3 Cutting blade 4 Leg 5 Powder receiving groove 6 Dust hole 7 Hole 8 Axis 10 Upper mill 10A Flange 10B Mortar 11 Lower conical surface 12 Cutting blade 13 Pocket 14 Handle 15 Bottom hole 16 Concave groove 20 Hole 21 Dust collection rod 23 Guide cutter 30 Guide 31 Cutting blade 24 Square hole 25 Square face 26 Bottom hole 27 Coil spring 28 Screw 29 Adjusting screw 32 Lid 33 Cover 34 Powder pan 35 Horizontal table 36 Tea leaves 39 tea powder

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A23F 3/00-5/50 A47J 47/00-44/02 B02B 1/00-3/14 B02C 1/00-7 / 18 B02C 15/00-17/24

Claims (2)

(57) [Claims] 1. An upper mill is placed on a lower mill, and while supplying tea leaves to a gap between an upper conical surface of the lower mill and a lower conical surface of the upper mill, the upper mill is moved to a central vertical axis. In a tea mill that cuts and grinds tea leaves with a number of cutting blades engraved on the upper conical surface by rotating around and a number of cutting blades engraved on the lower conical surface, the center of the upper surface of the upper mill Perimeter of the bottom of the pocket formed in the part
A bottom hole that penetrates the upper mill vertically
Support the guide cutter in the pocket so that it cannot rotate.
Guide that projects obliquely from the outer peripheral surface of the guide cutter
Attach the outer peripheral surface to the inner surface of the pocket and
Insert the cutting blade formed at the lower end of the guide into the bottom of the pocket.
A tea ceremony characterized by being attached to a tea ceremony. 2. An adjusting screw screwed into an upper end of a shaft fixedly attached to the lower mill and extending upward through the upper mill, and the guide cutter is screwed into an upper end of the shaft. Xaus of claim 1 by the elastic force of the coil spring which is interposed between, characterized in that is pressed against the guide cutter on the bottom of the pocket.