JP2000042436A - Powder-grinding mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder-grinding mill capable of easily cleaning off the refused grounds collected inside its case. SOLUTION: A detachable stem 18 is attached to a driving shaft 19 which rotates an upper powder-grinding part 16 or a lower powder-grinding part 17. In a case 14, the upper powder-grinding part is placed on top of the lower powder-grinding part with the stem 18 inserted through the center of the upper powder-grinding part 16 and the lower powder-grinding part 17. By detaching the stem 18 from the driving shaft 19 the upper powder-grinding part 16 and the lower powder-grinding part can be removed as one unit from the case 14. Accordingly it is unnecessary to remove the upper powder-grinding part before removing the lower powder-grinding part, and the upper powder-grinding part 16 and the lower powder-grinding part 17 can be removed from the case 14. As a result, it becomes easier to clean the refused grounds collected inside of the case 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinder for finely grinding grains such as tea with a mortar, and more particularly to a tabletop grinder for home use.

[0002]

2. Description of the Related Art As a conventional grinding machine, as shown in FIG. 5, an upper mill 2 and a lower mill 3 are superposed and arranged on an upper part of a case 1, and a motor 4 is arranged on a lower part of the case 1. An arrangement in which the upper mill 2 is rotationally driven by a motor 4 is known (see JP-A-10-43615). Case 1
The inside is vertically divided into two by the partition plate 1a.
The rotation of the motor 4 arranged at the lower part in the case 1 is reduced via the gear 5 and transmitted to the drive shaft 6. Drive shaft 6
Extend vertically and penetrate the partition plate 1a. A guide 7 for transmitting the rotation of the drive shaft 6 to the upper mill 2 is provided between the drive shaft 6 and the upper mill 2.

[0003] When the motor 4 is rotated, the upper mill 2 is rotated via a gear 5, a drive shaft 6 and a guide 7. On the other hand, the lower mill 3 engages with the lower mill support plate 8 detachably attached to the partition plate 1a, and its rotation is regulated.
The upper mill 2 and the lower mill 3 are relatively rotated to grind grains such as tea leaves between the upper mill 2 and the lower mill 3.

[0004]

However, in the conventional milling machine, when cereal grains such as tea leaves are crushed, the crushed grains are located between the upper mill 2 and the lower mill 3 or inside the case 1 such as a partition. Tea leaf powder and scum accumulate on the upper surface of the plate 1a. For this reason, the upper mill 2 and the lower mill 3 are removed from the case 1 and the tea leaves accumulated between the upper mill 2 and the lower mill 3 or the tea leaves accumulated inside the case 1 are periodically cleaned. There is a need.

[0005] When removing the upper mill 2 and the lower mill 3, first,
It was necessary to remove the fixing screw 9 from the drive shaft 6, then remove the upper mill 2 from the guide 7, then remove the guide 7 from the drive shaft 6, and finally remove the lower mill 3 from the drive shaft 6. . As described above, since the upper mill 2 and the lower mill 3 must be separately removed from the drive shaft 6, the upper mill 2 and the lower mill 3 cannot be removed while being combined, and it takes time to remove. Further, when the upper mill 2 is detached from the drive shaft 6 separately from the lower mill 3, the pulverized material caught between the upper mill 2 and the lower mill 3 may spill from the upper mill 2.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a grinding machine that can easily clean off scum of pulverized matter accumulated in a case.

[0007]

Hereinafter, the present invention will be described. In addition, in order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated embodiment.

According to the first aspect of the present invention, an upper mill (16) and a lower mill (17) are superposed and arranged in a case (14), and the upper mill (16) and the lower mill (17) are connected to each other. What is claimed is: 1. A powder grinder for grinding grains and the like by relatively rotating motion, wherein the upper mill (16) and the lower mill (17) are removed from the case (14) while being superposed. The above-mentioned problem is solved by a grinder.

According to the present invention, since the upper mill (16) and the lower mill (17) are removed from the case (14) while being superposed, the lower mill (17) is removed after the upper mill (16) is removed. There is no need to remove the upper mill (16) and the lower mill (17) from the case (14).
Therefore, it is possible to easily clean the scum of the crushed material accumulated inside the case (14). Moreover, since it is removed while being superimposed, scum of the pulverized material accumulated between the upper mill (16) and the lower mill (17) does not spill when removing.

According to a second aspect of the present invention, there is provided a core rod (18) detachable from a drive shaft (19) for rotating the upper mill (16) or the lower mill (17). ) And the lower mill (17) are inserted through the core rod (18),
It is characterized in that it is detached from the drive shaft (19) together with the core rod (18).

According to the present invention, the core rod (18) is provided detachably with respect to the drive shaft (19), and the upper mill (16) and the lower mill (17) inserted through the core rod (18) are cored. Since it is removed from the drive shaft (19) together with the rod, the upper mill (16) and the lower mill (17) can be easily removed from the case (14) while overlapping.

According to a third aspect of the present invention, the upper mill (16) is rotated by rotating the upper mill (16) by engaging the upper mill rotation restricting plate (23) detachably attached to the case (14). While rotating the lower mill (17) together with the core rod (18).

According to the present invention, the upper mill (16) and the lower mill (17) are relatively moved without providing a guide for transmitting rotation between the core rod (18) and the upper mill (16). Can be rotated. Since no guide is provided between the core rod (18) and the upper mill (16), the upper mill (16) is
8) can be easily removed. This facilitates cleaning between the upper mill (16) and the lower mill (17).

[0014]

1 to 4 show a grinding machine according to an embodiment of the present invention. This grinder is mainly used for grinding green tea at home and is used on a table. As shown in FIG. 1, the external appearance of the milling machine has a substantially cylindrical shape. On the top of the mill, there is an inlet 1 for green tea.
1 is provided, and a cup 12 for taking out crushed powdery green tea is removably incorporated in the upper part of the side surface. A timer 13 is provided below the cup 12. The grinding time of the green tea is adjusted by the timer 13.

FIG. 2 shows a cross section of the milling machine. In this grinding machine, the case 14 has a partition plate 14 inside.
a is divided into two in the vertical direction. A motor 29 and a drive shaft 19 rotated by the motor 29 are arranged below the case 14. On the upper side of the case 14, the upper mill 1
6, an upper mill rotation regulating plate 23 that engages with the upper mill 16, a lower mill 17 superimposed on the lower surface of the upper mill 16, a core rod 18 through which the upper mill 16 and the lower mill 17 are inserted, and a core rod. 18 and drive shaft 1
9 and a dog clutch 20 provided therebetween.

The case 14 comprises a case body 14c and an upper lid 14b attached to the upper end of the case body. The upper lid 14b is easily and detachably attached to the main body 14c with one touch. At the center of the upper lid 14b,
Can be opened. This inlet 11 is closed with a plastic cap 28. The cap 28 is opened when tea leaves are put. A guide surface 22 for tea leaves is vertically provided on an upper lid 14b around the inlet 11 toward the upper mill 16 located below. The tea leaves are thrown into the upper surface of the upper mill 16 while being guided by the guide surface 22.

As shown in FIG. 3, the upper mill rotation regulating plate 23
Is detachably attached to the case body 14c. The upper mill rotation regulating plate 23 has a substantially disk shape, and has an opening near the center through which tea leaves pass. Around the upper mill rotation regulating plate 23, several engagement projections 23a are provided. On the other hand, the case body 14c has an inner peripheral edge 14 protruding inward.
d is formed. The inner peripheral edge 14d has an engaging protrusion 23
The notch corresponding to a is opened. Engaging projection 23a
Is inserted into a notch formed in the inner peripheral edge 14d and rotated, the engaging protrusion 23a engages with the lower surface of the inner peripheral edge 14d. When the upper mill rotation restricting plate 23 is urged upward by the leaf spring 25, the engaging protrusion 23a comes into close contact with the inner peripheral edge 14d. On the lower surface around the opening of the upper mill rotation regulating plate 23, four engaging projections 23b are projected in the circumferential direction. The engaging projection 23 b is provided on the upper surface of the upper mill 16.
6a. The engaging projection 23 b of the upper mill rotation regulating plate 23 incorporated in the case 14
By engaging with a, rotation of the upper mill 16 is regulated.

The upper mill 16 has a substantially disk shape. On the lower surface of the upper mill 16, a main groove extending radially from the center so as to divide the whole into eight is formed. A plurality of sub-grooves are formed between the main grooves. In the center of the upper mill 16, a core rod hole 16b into which the core rod 18 is inserted penetrates. A supply port is provided slightly outside the center of the upper mill 16 to supply the tea leaves put on the upper surface of the upper mill 16 between the upper mill 16 and the lower mill 17.

The lower mill 17 also has a substantially disk shape. On the upper surface of the lower mill 17, a main groove extending radially from the center so as to divide the whole into eight is formed. A plurality of sub-grooves are formed between the main grooves. At the center of the lower mill 17, a core rod hole 17b into which the core rod 18 is inserted is formed. Further, on the lower surface of the lower mill 17, four lower mill recesses 17a are formed in the circumferential direction to be engaged with a core rod flange 18a formed integrally with the core rod 18.

The core rod 18 has a core rod flange 18a for supporting the upper mill 16 and the lower mill 17 integrally at the lower end. Core rod 1
A fixing screw 27 is screwed into the upper end of 8. The upper mill 16 and the lower mill 17 inserted into the core rod 18 are sandwiched between the fixing screw 27 and the core rod flange 18a. Core rod flange 18
The upper surface of a is provided with four flange plate projections 18b in the circumferential direction.
Is formed. The flange plate convex portion 18b is
Is fitted with the lower mill recess 17a formed on the lower surface of. The lower surface of the lower mill 17 and the upper surface of the core rod flange 18a are fixed with an adhesive. By fixing the lower surface of the lower mill 17 to the upper surface of the core rod flange 18a, the lower mill 17 rotates together with the core rod 18. On the lower surface of the core rod flange 18a, a pawl constituting the meshing clutch 20 is provided.

The motor 29 is fixed to a lower part of the case 14. The drive shaft 19 is vertically supported by bushes 30a and 30b fixed to the case 14. The rotation of the motor 29 is controlled by the drive shaft 19 via a gear 27 (not shown).
Is transmitted to The upper end of the drive shaft 19 is
a and protrudes above the case 14. Drive shaft 1
A flange plate 24 is fixed to the upper end of 9. The upper surface of the flange plate 24 is also provided with a pawl constituting the dog clutch 20. The pawl provided on the upper surface of the flange plate 24 and the pawl provided on the lower surface of the core rod flange 18 a are engaged with each other to transmit the rotation of the drive shaft 19 to the core rod 18. here,
The axis of the drive shaft 19 coincides with the axis of the core rod 18. Since the lower mill 17 rotates together with the core rod 18, the motor 29
, The lower mill 17 rotates.

A leaf spring 25 is fixed to the flange plate 24. The leaf spring 25 has a tip abutting on the lower mill 17 and urges the lower mill 17 to the upper mill 16 by an elastic force. By the elastic force of the leaf spring 25, the lower mill 17 is brought into close contact with the upper mill 16, and
The upper mill 16 is in close contact with the upper mill rotation restricting plate 23. By providing the leaf spring 25, it is possible to relatively rotate the upper mill 16 and the lower mill 17 while applying pressure between the upper mill 16 and the lower mill 17.

The tea leaves are supplied from the supply port of the upper mill 16 to the upper mill 16.
And between the lower mill 17. By rotating the upper mill 16 and the lower mill 17 relatively, the tea leaves are subjected to shearing force and crushed. The ground tea leaves are centrifuged and discharged from the outer periphery of the mortar. The discharged powdered tea is stored in a tray 31 as shown in FIG. Powdered tea is
It is raked by the wings 26 provided on the side surface of the lower mill 17 and collected in the cup 12.

Next, a method of removing the upper mill 16 and the lower mill 17 will be described. First, as shown in FIG.
b is removed from the case body 14c. Next, the upper mill rotation restricting plate 23 is rotated so that the engagement protrusion 23a provided on the outer periphery of the upper mill rotation restricting plate 23 is aligned with the notch provided on the inner peripheral edge 14d of the case body 14c. And inner rim 1
Release engagement with 4d. Then, the upper mill rotation regulating plate 23 is removed from the case body 14c. In this state, the fixing screw 27 screwed to the upper end of the core rod 18 is lifted. Core rod 18
Since the drive shaft 19 and the drive shaft 19 are connected via the dog clutch 20, the core rod 18 can be easily removed from the drive shaft 19. An upper mill 16 and a lower mill 17 are inserted through the core rod 18, and the core rod flange 1 provided on the core rod 18 is provided.
8a supports the upper mill 16 and the lower mill 17, so that the core rod 18
The upper mill 16 and the lower mill 17 are removed from the drive shaft 19.
Is removed from the drive shaft 19 while being overlapped with the core rod 18. For this reason, the upper mill 16 and the lower mill 17 can be easily removed while being overlapped. Therefore, it is not necessary to remove the upper mill 16 once and then remove the lower mill 17, so that it is not necessary to remove the lower mill 17, and it is possible to easily clean the scum of the crushed material accumulated inside the case 14. Moreover, since it is removed while being superimposed, scum of the pulverized material accumulated between the upper mill 16 and the lower mill 17 does not spill when removing.

In order to clean the powdered tea sandwiched between the upper mill 16 and the lower mill 17, first, the fixing screw 27 screwed on the upper part of the core rod 18 is turned to fix the fixing screw 27 to the core rod. Remove from 18. Next, the upper mill 16 is removed from the core rod 18.
Since a guide for transmitting rotation is not provided between the upper mill 16 and the core rod 18 unlike a conventional milling machine, the upper mill 16 can be easily removed from the core rod 18.

[0026]

As described above, according to the present invention, since the removing means is provided for removing the upper mill and the lower mill from the case while overlapping the lower mill, it is necessary to remove the lower mill after removing the upper mill. Therefore, removal of the upper mill and the lower mill from the case becomes easy. Therefore, the scum of the crushed material accumulated in the case can be easily cleaned.

[Brief description of the drawings]

FIG. 1 is an external view showing a milling machine according to an embodiment of the present invention.

FIG. 2 is a sectional view of the milling machine.

FIG. 3 is a sectional view showing the mortar and a driving mechanism.

FIG. 4 is an exploded view of the grinding machine.

FIG. 5 is a sectional view of a conventional grinding machine.

[Explanation of symbols]

 14 Case 16 Upper mill 17 Lower mill 18 Core rod 19 Drive shaft 23 Upper mill rotation regulating plate

Claims (3)

[Claims] 1. A milling machine for arranging an upper mill and a lower mill in a case so as to overlap each other, and relatively rotating the upper mill and the lower mill to grind grains or the like, A milling machine wherein the upper mill and the lower mill are removed from the case while being superposed. 2. A core rod which is detachable from a drive shaft for rotating the upper mill or the lower mill, wherein the upper mill and the lower mill are inserted through the core rod, and together with the core rod. The milling machine according to claim 1, wherein the grinding machine is detached from the drive shaft. 3. The method of controlling the rotation of the upper mill by engaging the upper mill with an upper mill rotation restricting plate detachably attached to the case, and rotating the lower mill together with the core rod. The milling machine according to claim 2, characterized in that: