JP3492209B2 - Tea grinder - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art As a conventional grinder, as shown in FIG. 5, an upper mill 2 and a lower mill 3 are arranged in an overlapping manner in an upper part of a case 1, and a motor 4 is placed in a lower part of the case 1. It is known that the upper mill 2 is arranged and the upper mill 2 is driven to rotate by a motor 4 (see Japanese Patent Laid-Open No. 10-43615). Case 1
The inside is vertically divided into two by the partition plate 1a.
The rotation of the motor 4 arranged in the lower part of the case 1 is decelerated 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.

When the motor 4 is rotated, the upper mill 2 is rotated via the gear 5, the drive shaft 6 and the guide 7. On the other hand, the lower mortar 3 engages with the lower mortar support plate 8 detachably attached to the partition plate 1a, and its rotation is restricted.
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 grinder, when a grain such as tea leaves is crushed, it is placed between the upper mill 2 and the lower mill 3 or inside the case 1, for example, a partition. Tea leaf powder and dregs are collected on the upper surface of the plate 1a. Therefore, the upper mortar 2 and the lower mortar 3 are removed from the case 1, and the tea leaves accumulated between the upper mortar 2 and the lower mortar 3 or the tea leaves accumulated inside the case 1 are regularly cleaned. There is a need.

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. . In this way, the upper mortar 2 and the lower mortar 3 must be separately removed from the drive shaft 6, so that the upper mortar 2 and the lower mortar 3 cannot be removed while being combined, and it takes time and effort to remove them. Further, when the upper mill 2 is removed from the drive shaft 6 separately from the lower mill 3, the crushed material sandwiched between the upper mill 2 and the lower mill 3 may spill from the upper mill 2.

[0006] Therefore, an object of the present invention is to provide a tea grinder capable of easily cleaning the residue of tea leaves accumulated inside the case.

[0007]

The present invention will be described below. 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 forms.

[0008]

[0009]

According to the first aspect of the present invention, the upper mill (16) and the lower mill (17) are arranged in an overlapping manner in the case (14), and the upper mill and the lower mill are relatively rotated. A tea grinder for crushing tea leaves using a core rod that is attachable to and detachable from a drive shaft that rotates the upper mill or the lower mill, and the upper mill and the lower mill are inserted into the core rod. The tea grinder is characterized in that it is removed from the drive shaft together with the core rod, and the upper mortar and the lower mortar are removed from the case while being overlapped with each other.

According to the present invention, the core rod (18) which is detachable from the drive shaft (19) is provided, 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 being superposed. Therefore, it is possible to easily clean the dusts of the crushed material accumulated inside the case (14). In addition, since the pieces are removed while being piled up, dusts of the crushed material that have accumulated between the upper mill (16) and the lower mill (17) do not spill out during the removal.

According to a second aspect of the present invention, the upper mortar (16) is rotated by engaging the upper mortar (16) with an upper mortar rotation restricting plate (23) detachably attached to the case (14). The lower mill (17) is rotated together with the core rod (18) while regulating the above.

According to the present invention, the upper mill (16) and the lower mill (17) are relatively moved to each other without providing a guide for transmitting rotation between the core rod (18) and the upper mill (16). It can be rotated. Since the guide is not provided between the core rod (18) and the upper mill (16), the upper mill (16) is not attached to the core rod (1
It can be easily removed from 8). This facilitates cleaning between the upper mill (16) and the lower mill (17).

[0014]

1 to 4 show a tea grinder according to an embodiment of the present invention. This tea ground
The machine is mainly used for crushing green tea at home and used on the table. As shown in FIG. 1, the appearance of the tea grinder has a substantially columnar shape. The top of the tea grinder is provided with an inlet 11 for putting in green tea, and a cup 12 for taking out pulverized powdery green tea is detachably incorporated in the upper portion of the side surface. A timer 13 is installed below the cup 12. The crushing time of green tea is adjusted by this timer 13.

FIG. 2 shows a cross section of the tea grinder . In this tea grinder , the inside of the case 14 is vertically divided into two by a partition plate 14a. 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, an upper mill 16 and an upper mill rotation restricting plate 23 that engages with the upper mill 16,
The lower mill 17 and the upper mill 16 which are superposed on the lower surface of the upper mill 16.
Also, a core rod 18 through which the lower mill 17 is inserted, and a meshing clutch 20 provided between the core rod 18 and the drive shaft 19 are arranged.

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, the inlet 11
Can be opened. The charging port 11 is closed by a plastic cap 28. The cap 28 is opened when the tea leaves are added. A tea leaf guide surface 22 is vertically provided on the upper lid 14b around the charging port 11 toward the upper mill 16 located below. The tea leaves are introduced onto 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 restricting plate 23
Is detachably attached to the case body 14c. The upper mill rotation restricting plate 23 has a substantially disc shape and has an opening near the center through which tea leaves pass. Around the upper mill rotation restricting plate 23, several engaging protrusions 23a are provided. On the other hand, the case body 14c has an inner peripheral edge 14 protruding inward.
d is formed. The engagement protrusion 23 is formed on the inner peripheral edge 14d.
The notch corresponding to a is opened. Engagement protrusion 23a
Is fitted into a notch formed in the inner peripheral edge 14d and rotated, the engagement protrusion 23a engages with the lower surface of the inner peripheral edge 14d. By biasing the upper mill rotation restricting plate 23 upward by the plate spring 25, the engagement protrusion 23a comes into close contact with the inner peripheral edge 14d. Further, on the lower surface around the opening of the upper mill rotation restricting plate 23, four engaging projections 23b are projected in the circumferential direction. The engaging protrusion 23b is the engaging recess 1 provided on the upper surface of the upper mill 16.
6a is fitted. The engagement protrusion 23b of the upper mill rotation restricting plate 23 incorporated in the case 14 is the engagement recess 16 of the upper mill 16.
By engaging with a, rotation of the upper mill 16 is restricted.

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

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

The core rod 18 integrally has a core rod flange 18a for supporting the upper mill 16 and the lower mill 17 at its lower end. Core rod 1
A fixing screw 27 is screwed onto 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
On the upper surface of "a", four flange plate protrusions 18b are provided in the circumferential direction.
Is formed. This flange plate convex portion 18b is the lower mill 17
It fits into the lower mill recess 17a formed on the lower surface of the. 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 and the upper surface of the core rod flange 18 a, the lower mill 17 rotates together with the core rod 18. A pawl that constitutes the dog clutch 20 is provided on the lower surface of the core rod flange 18a.

The motor 29 is fixed to the lower part of the case 14. The drive shaft 19 is vertically supported by bushes 30 a and 30 b fixed to the case 14. The rotation of the motor 29 is performed by driving the drive shaft 19 via a gear 27 (not shown in part).
Be transmitted to. The upper end of the drive shaft 19 has the partition plate 14
It penetrates through a and projects 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 that constitutes 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 18a 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 and the axis of the core rod 18 are aligned with each other. Since the lower mill 17 rotates together with the core rod 18, the motor 29
The lower mill 17 is rotated by the rotation of.

A leaf spring 25 is fixed to the flange plate 24. The tip of the leaf spring 25 contacts the lower mill 17 and biases the lower mill 17 toward the upper mill 16 by elastic force. The lower mortar 17 is brought into close contact with the upper mortar 16 by the elastic force of the leaf spring 25, and
The upper mill 16 is brought into close contact with the upper mill rotation regulating 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.

Tea leaves are supplied from the supply port of the upper mill 16 to the upper mill 16.
And between the lower mill 17 and. By rotating the upper mortar 16 and the lower mortar 17 relative to each other, the tea leaves are crushed by the shearing force. The crushed tea leaves are centrifuged and discharged from the outer periphery of the mortar. The discharged powdered tea is stored in a saucer 31 as shown in FIG. Powdered tea is
It is scraped by the scraping blades 26 provided on the side surface of the lower mill 17 and accumulated 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.
Remove b from the case body 14c. Next, the upper mortar rotation restricting plate 23 is rotated to align the engaging protrusion 23a provided on the outer periphery of the upper mortar rotation restricting plate 23 with the notch provided on the inner peripheral edge 14d of the case body 14c, and the upper mortar rotation restricting plate 23 And inner edge 1
Release the engagement with 4d. Then, the upper mill rotation restricting plate 23 is removed from the case body 14c. In this state, the fixing screw 27 screwed onto 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. The upper die 16 and the lower die 17 are inserted into the core rod 18, and the core rod flange 1 provided on the core rod 18
Since 8a supports the upper mill 16 and the lower mill 17, the core rod 18
When the blade is removed from the drive shaft 19, the upper mill 16 and the lower mill 17
Are removed from the drive shaft 19 while still superposed with the core rod 18. Therefore, the upper mortar 16 and the lower mortar 17 can be easily removed while the upper mortar 16 and the lower mortar 17 are overlapped. Therefore, it is not necessary to remove the upper mortar 16 and then the lower mortar 17, and it is possible to save the trouble of removing it and to easily clean the scraps of the crushed material accumulated inside the case 14. In addition, since the pieces are removed while being piled up, the scraps of the crushed material accumulated between the upper mill 16 and the lower mill 17 do not spill out when they are removed.

When cleaning the powdered tea sandwiched between the upper mill 16 and the lower mill 17, first, the fixing screw 27 screwed onto the upper portion of the core rod 18 is turned to move the fixing screw 27. Remove from 18. Next, the upper mill 16 is pulled out 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 the conventional grinder, 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 for removing the upper mortar and the lower mortar from the case while the upper mortar and the lower mortar are overlapped is provided, it is necessary to remove the lower mortar after removing the upper mortar. It is easy to remove the upper and lower mortars from the case. Therefore, it is possible to easily clean the dust of the crushed material accumulated inside the case.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of the tea grinder .

FIG. 3 is a cross-sectional view showing the die and the drive mechanism.

FIG. 4 is an exploded view of the tea grinder .

FIG. 5 is a cross-sectional view of a conventional grinder.

[Explanation of symbols]

14 cases 16 Upper mill 17 Lower mill 18 core rod 19 Drive shaft 23 Upper mill rotation regulation plate

Claims (2)

(57) [Claims] 1. A arranged superposing the Ueusu a lower die within the case, a said upper die and the lower die and the relative rotational movement is allowed by tea mincer for grinding tea leaves, the Attached to the drive shaft that rotates the upper mill or the lower mill.
A removable core rod is provided, and the upper mill and the lower mill are the cores.
Inserted into the rod and removed from the drive shaft together with the core rod.
The tea grinder is characterized in that the upper mill and the lower mill are removed from the case while being stacked. 2. The rotation of the upper mill is regulated by engaging the upper mill with an upper mill rotation restricting plate detachably attached to the case, while rotating the lower mill together with the core rod. The tea grinder according to claim 1, which is characterized in that.