Beverage manufacturing equipment

Abstract

The present invention provides a beverage manufacturing apparatus in which each blade component of the rotating blade is less prone to damage, thereby improving the durability of the rotating blade. [Solution] The beverage manufacturing apparatus comprises a holding part for holding cups into which beverage ingredients are placed, a drive shaft having a rotating blade 4, and a drive mechanism for rotating and reciprocating the drive shaft. The rotating blade 4 has a shaft member 5 connected to the drive shaft, blade members 6A and 6B connected to the shaft member 5, and a tip member 7 for maintaining the connection of the blade members 6A and 6B to the shaft member 5. The blade members 6A and 6B are composed of a first blade member 6A having a first central portion 61A and a pair of first blade portions 62A, and a second blade member 6B having a second central portion 61B and a pair of second blade portions 62B. The first blade member 6A and the second blade member 6B are maintained in a non-free-rotating state by the tightening axial force generated when the male screw portion 711 and the female screw portion 51 are screwed together and the tip member 7 is tightened to the shaft member 5.

Description

TECHNICAL FIELD

[0001] The present invention relates to a beverage production apparatus. BACKGROUND ART

[0002] Beverage production apparatuses are known under names such as smoothie machines and cup blenders. For beverage production apparatuses, beverage raw materials containing solids such as ice, vegetables, and fruits, and liquids such as water, juice, dairy products, and liquid sugar are used. Then, a rotating blade crushes the solids, and agitates or mixes the crushed solids and the liquids to produce a beverage from the beverage raw materials. An example of such a beverage production apparatus is described in Patent Document 1. In the beverage production apparatus of Patent Document 1, a cup holding the beverage raw materials is held, and the beverage raw materials in the cup are agitated or mixed by a rotating and reciprocating rotating blade to produce a beverage.

[0003] Further, in the beverage production apparatus of Patent Document 1, a rotating blade, in which a shaft member and a blade member are integrally formed, is attached to the lower end of a rotating shaft that is rotated by a motor via a screw of the shaft member. The rotating blade is formed by disposing the blade member having a plurality of blade portions on the distal end side portion of the shaft member, caulking and deforming the distal end portion of the shaft member, and integrating the shaft member and the blade member. In order to increase the assembly strength between the shaft member and the blade member, welding is performed at the boundary portion between the shaft member and the blade member. A similar configuration is also disclosed in the fresh juice production apparatus of Patent Document 2. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0004] PATENT DOCUMENT 1 Japanese Unexamined Patent Application Publication No. 2013-81514 PATENT DOCUMENT 2 Japanese Unexamined Patent Application Publication No. 2012-10959 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] In the beverage manufacturing apparatus of Patent Document 1 and the fresh juice manufacturing apparatus of Patent Document 2, the multiple blade portions of the blade member are formed by cutting out a flat plate and bending the central portion of the blade member. In the blade member, there are alternating blade portions that are bent towards the axial base end and blade portions that are bent towards the axial tip. The root portions of the multiple blade portions are located near the inner-angled outer shape portion formed by the cutting process, and are also the starting points for the bending process. The root portions of the blade portions have residual stress due to the cutting and bending processes, as well as residual stress due to welding. It is thought that the processed state of the blade portions and the state of residual stress remaining in the processed parts of the blade portions vary from one blade member to another due to the influence of the processing process.

[0006] On the other hand, when manufacturing beverages from beverage raw materials, if solid matter contained in the beverage raw materials repeatedly collides with the multiple blades of a rotating blade, it is thought that stress concentrates on the inner-angled outer part located at the base of the blade. Furthermore, it has been found that if adverse conditions are met, such as poor processing of the blade and large residual stress remaining in the processed parts of the blade, the base of the blade may become fatigued and damaged due to repeated stress.

[0007] This invention has been made in view of the above problems, and aims to provide a beverage manufacturing apparatus in which each blade component of the rotating blade is less likely to be damaged, thereby improving the durability of the rotating blade. [Means for solving the problem]

[0008] One aspect of the present invention is, A holding part (3, 37) for holding a cup (8) into which beverage ingredients can be placed, A drive shaft (20) having a rotating blade (4) positioned inside the cup held in the holding part, The system includes a drive mechanism (2) that rotates and reciprocates the drive shaft, The rotating blade is constructed using a shaft member (5) connected to the axial end (L2) of the drive shaft, blade members (6A, 6B) connected to the axial end of the shaft member, and a tip member (7) for maintaining the connection of the blade members to the shaft member. A male threaded portion (711) is provided on either the shaft member or the tip member, and a female threaded portion (51) is provided on the other. The aforementioned cutting member is A first cutting tool member (6A) having a first central portion (61A) through which the male screw portion is inserted, and a pair of first wing portions (62A) that protrude from the first central portion at opposite radial positions, inclined toward the radial outer circumference and the axial base end (L1), A second cutting tool member (6B) has a second central portion (61B) through which the male screw portion is inserted, and a pair of second wing portions (62B) that protrude from the second central portion at opposite positions in the radial direction, inclined toward the radial outer circumference and the axial tip, with the second central portion aligning with the first central portion in the axial direction, It is constructed using The first cutting member and the second cutting member are in a beverage manufacturing apparatus (1) and are maintained in a state where they do not rotate freely by the tightening axial force generated when the male thread portion and the female thread portion are screwed together and the tip member is tightened on the shaft member. [Effects of the Invention]

[0009] In the beverage manufacturing apparatus according to the above embodiment, the blade member constituting the rotating blade is formed by dividing it into a first blade member and a second blade member. Hereinafter, the first blade member and the second blade member will be referred to as two blade members or each blade member. The pair of first blade portions and the pair of second blade portions have a configuration in which they protrude radially outward from the first central portion or the second central portion at positions opposite each other in the radial direction. Due to these configurations, in each blade member, an internally angular outer shape portion, which is a shape change portion where the shape changes as if bending, is not formed between the first blade portions or the second blade portions. Therefore, there are almost no areas where stress tends to concentrate in each blade member, and stress concentration is less likely to occur in each blade member during beverage manufacturing when manufacturing beverages from beverage raw materials. In addition, because internally angular outer shape portions are not formed, residual stress is less likely to occur in each blade member when processing to form the outer shape of each blade member. Furthermore, the magnitude of residual stress is less affected by variations between individual blade members.

[0010] Furthermore, in the beverage manufacturing apparatus according to the above embodiment, the tightening axial force generated in each blade member when the tip member is tightened to the shaft member is controlled by setting a tightening torque or the like and tightening the tip member to the shaft member. This tightening axial force maintains the assembled state of the rotating blades so that the first blade member and the second blade member do not rotate freely. With the above configuration, even when each blade member of the rotating blades is subjected to repeated stress due to collisions with solid matter contained in the beverage raw materials during beverage manufacturing, each blade member is less likely to be damaged.

[0011] Therefore, according to the beverage manufacturing apparatus of the above-described embodiment, each blade component of the rotating blade becomes less susceptible to damage, and the durability of the rotating blade is improved.

[0012] In the beverage manufacturing apparatus according to the above embodiment, the first blade member and the second blade member are not prevented from rotating relative to each other, and it is sufficient that they remain intersecting in the circumferential direction under the tightening axial force. Each blade member is tightened by a single-point tightening of the tip member to the shaft member and is sandwiched between the shaft member and the tip member. In other words, there is no prevention of rotation of each blade member relative to the shaft member and the tip member, and there are no shape-changing parts on each blade member for preventing rotation. Even with this configuration, no areas where stress tends to concentrate are formed on each blade member, and stress concentration is less likely to occur on each blade member during beverage manufacturing. As a result, each blade member of the rotating blade becomes even less susceptible to damage.

[0013] The reference numerals in parentheses for each component shown in one embodiment of the present invention indicate the correspondence with the reference numerals in the figures of the embodiment, but the components are not limited to those described in the embodiment. [Brief explanation of the drawing]

[0014] [Figure 1] This is an explanatory diagram showing a beverage manufacturing apparatus according to an embodiment, in which the rotating blade is in a standby position. [Figure 2] This is a partially enlarged explanatory diagram of Figure 1, showing the state in which the rotating blade has descended into the cup according to the embodiment. [Figure 3] This is an explanatory diagram showing a rotary cutting tool according to an embodiment. [Figure 4] This is an explanatory diagram showing the components of a rotary cutting tool in an exploded view according to an embodiment. [Figure 5] This is an explanatory diagram showing a rotary cutting tool according to an embodiment, with the shaft member shown in cross-section and viewed from the base end side in the axial direction. [Figure 6] This is an explanatory diagram showing a rotating cutting tool according to an embodiment, as shown by the cross-section along the line VI-VI in Figure 5. [Figure 7] This is an explanatory diagram showing the rotary cutting tool according to the embodiment, viewed from the axial tip side. [Figure 8] This is a graph showing the relationship between tightening axial force and tightening torque according to the embodiment. [Figure 9] FIG. 4 is an explanatory diagram showing another configuration of the tip member according to the embodiment. [Figure 10] FIG. 3 is a partially enlarged explanatory view corresponding to FIG. 2, showing a state of cleaning the rotary cutter according to the embodiment. [Figure 11] FIG. 4 is a partially enlarged explanatory view corresponding to FIG. 2, showing a state of attaching and detaching the rotary cutter according to the embodiment. [Figure 12] FIG. 4 is an explanatory diagram showing an inner corner-shaped outer portion of the cutter member according to the embodiment. [Mode for Carrying Out the Invention]

[0015] A preferred embodiment of the above-described beverage production apparatus will be described with reference to the drawings. <Embodiment> As shown in FIG. 1, the beverage production apparatus 1 includes holding portions 3 and 37 for holding a cup 8 containing a beverage raw material, a drive shaft 20 having a rotary cutter 4, and a drive mechanism 2 for rotating and reciprocating the drive shaft 20. The rotary cutter 4 is arranged inside the cup 8 held by the holding portions 3 and 37. As shown in FIGS. 2 and 3, the rotary cutter 4 is configured by using a shaft member 5 connected to the distal end side L2 in the axial direction L of the drive shaft 20, cutter members 6A and 6B connected to the distal end side L2 in the axial direction L of the shaft member 5, and a tip member 7 for maintaining the connected state of the cutter members 6A and 6B to the shaft member 5. Here, FIG. 1 shows a state where the rotary cutter 4 is at the standby position. FIG. 2 shows a state where the rotary cutter 4 is lowered into the cup 8 as a partially enlarged view of FIG. 1. As shown in FIG. 6, a female threaded portion 51 is provided on the distal end side L2 of the shaft member 5, and a male threaded portion 711 is provided on the proximal end side L1 of the tip member 7.

[0016] As shown in Figures 3 and 4, the cutting tool members 6A and 6B are composed of a first cutting tool member 6A having a first central portion 61A and a pair of first blade portions 62A, and a second cutting tool member 6B having a second central portion 61B and a pair of second blade portions 62B. Here, Figure 4 is a diagram showing the components of the rotary cutting tool 4 in Figure 3 in an exploded view. The first cutting tool member 6A and the second cutting tool member 6B are arranged facing each other in the axial direction L, with their phases, which are angular positions in the circumferential direction C, being different from each other. The first central portion 61A has a through hole 611 through which the male thread portion 711 of the tip member 7 is inserted. The pair of first blade portions 62A protrude from the first central portion 61A at opposite radial positions, inclined toward the radial outer circumference and the base end L1 in the axial direction L. The second central portion 61B has a through hole 611 through which the male thread portion 711 of the tip member 7 is inserted. The pair of second wing portions 62B protrude radially from the second central portion 61B at opposite positions in the radial direction, inclined toward the radial outer circumference and the tip side L2 in the axial direction L.

[0017] The first cutting tool member 6A and the second cutting tool member 6B are maintained in a non-rotating state by the tightening axial force generated when the male threaded portion 711 and the female threaded portion 51 are screwed together and the tip member 7 is tightened against the shaft member 5. The first cutting tool member 6A and the second cutting tool member 6B have shapes that allow them to rotate freely relative to the shaft member 5 and the tip member 7, but they are not prevented from rotating from each other and are maintained in a state where they intersect each other in the circumferential direction C by the tightening axial force.

[0018] The beverage manufacturing apparatus 1 of this configuration will be described in detail below. (Axial direction L, circumferential direction C, radial direction) In this embodiment, the axial direction L refers to the direction along the central axis L0 of the drive shaft 20 and the shaft member 5. In this embodiment, the axial direction L is oriented in the vertical direction, with the tip side L2 of the axial direction L located at the lower end in the vertical direction, and the base side L1 of the axial direction L located at the upper end in the vertical direction. The circumferential direction C refers to the direction around the central axis L0 of the drive shaft 20 and the shaft member 5. The radial direction refers to the direction that is radial to the central axis L0 of the drive shaft 20 and the shaft member 5.

[0019] (Configuration of beverage manufacturing apparatus 1) As shown in Figures 1 and 2, the beverage manufacturing apparatus 1, also called a smoothie machine or cup blender, manufactures beverages from beverage ingredients. The beverage ingredients include solids such as ice, vegetables, and fruits, and liquids (base drinks) such as water, juice, dairy products, and liquid sugar. Vegetables and fruits may be used in a frozen state. The beverage, also called a smoothie, is manufactured as a sherbet-like drink. Inside the cup 8 held in the holding sections 3 and 37, the solids are crushed by the rotating blades 4, and the crushed solids and liquids are stirred or mixed to produce the beverage.

[0020] The beverage manufacturing apparatus 1 comprises a main frame 11, a drive mechanism 2 attached to the main frame 11, a drive shaft 20 provided on the drive mechanism 2, a lifting-side holding part 3 which moves up and down together with the drive shaft 20, a protector base 37 which is a fixed-side holding part fixed to the main frame 11, and a housing 12 that covers the main frame 11, the drive mechanism 2, the lifting-side holding part 3 and the protector base 37. The drive mechanism 2 comprises a rotary motor 21 that rotates the drive shaft 20, a lifting base 22 to which the rotary motor 21 is attached, a rail (not shown) that guides the vertical movement of the lifting base 22, a lifting screw 23 and nut 24 for raising and lowering the lifting base 22, a lifting motor 25 that rotates the lifting screw 23, etc. The nut 24 is attached to the lifting base 22. When the lifting screw 23 rotates in the forward direction, the nut 24 and the lifting base 22 move downward, and when the lifting screw 23 rotates in the reverse direction, the nut 24 and the lifting base 22 move upward.

[0021] The lifting side holding section 3 is composed of a rotating guide cylinder 31, a holding spring 32, a cylindrical spring guide 33, a cylindrical cup pipe 34, a bottomed cylindrical cup cover 35, a cylindrical cleaning cover 36, and the like. The rotating guide cylinder 31 is attached to the lifting base 22 and guides the rotation of the drive shaft 20 by bearings. The holding spring 32 is supported on the outer circumference of the rotating guide cylinder 31 at its base end L1 in the axial direction L. The spring guide 33 is attached to the outer circumference of the tip end L2 of the holding spring 32 in the axial direction L. The cup pipe 34 is attached to the tip end L2 of the spring guide 33 in the axial direction L. The cup cover 35 is attached to the tip end L2 of the cup pipe 34 in the axial direction L and covers the rotating blade 4 from the base end L1 in the axial direction L and the radial outer circumference. The cleaning cover 36 is attached to the tip end L2 of the cup pipe 34 and the cup cover 35 in the axial direction L. The main frame 11 has a guide section 111 which has a guide opening for guiding the lifting and lowering of the lifting side holding section 3.

[0022] As shown in Figures 1 and 2, the cup 8 is used while protected from the outer periphery by a cup protector 81. The cup protector 81 is placed on a protector stand 37. The lower part of the main frame 11 is provided with a cleaning nozzle 15 for cleaning the rotating blade 4 by spraying cleaning water, a funnel 16 for collecting liquid around the protector stand 37, and a drainage path 17 for draining the liquid collected in the funnel 16 to the outside of the beverage manufacturing apparatus 1. The side wall surface of the main frame 11 is provided with a water injection nozzle 18 for pouring drinking water into the cup 8 held on the protector stand 37 via the cup protector 81.

[0023] The lifting screw 23 is rotatably supported on the main frame 11 via a bearing. The rotation of the lifting motor 25 is reduced using a pulley and belt and transmitted to the lifting screw 23. The rotation of the rotary motor 21 is transmitted directly to the drive shaft 20 via a coupling. The drive shaft 20, which is connected to the output shaft of the rotary motor 21 via a coupling, is positioned to hang downward in the drive mechanism 2. The shaft member 5 of the rotating blade 4 is connected to the lower end of the drive shaft 20 as the tip in the axial direction L.

[0024] The drive mechanism 2 is configured to perform the following actions simultaneously: the operation of the rotating blade 4 descending into the cup 8, the operation of the rotating blade 4 reciprocating up and down within the cup 8, and the operation of the rotating blade 4 rotating. The operation of the rotating blade 4 descending into the cup 8 is performed as the operation of the lifting base 22 descending when the lifting screw 23, which is rotated by the lifting motor 25, rotates in the forward direction. The operation of the rotating blade 4 reciprocating up and down within the cup 8 is performed as the operation of the lifting base 22 repeatedly descending and rising alternately when the lifting screw 23, which is rotated by the lifting motor 25, rotates alternately in the forward and reverse directions. The drive shaft 20 and the rotating blade 4 rotate in only one direction by the rotation motor 21. The rotation motor 21, drive shaft 20, rotating blade 4, lifting side holding part 3A, etc., descend or rise together with the lifting base 22.

[0025] The front of the housing 12 is provided with an operation panel 13, an opening / closing door 14, etc. When the opening / closing door 14 is opened, the cup protector 81 that holds the cup 8 can be placed on the protector base 37. With the cup 8 held between the protector base 37 and the lifting / lowering side holding part 3, the rotating blade 4 moves down and up and down to produce the beverage inside the cup 8.

[0026] (Rotating blade 4) As shown in Figures 3 and 4, the rotary blade 4 of this embodiment integrates the first blade member 6A and the second blade member 6B by utilizing the tightening axial force when the tip member 7 is tightened to the shaft member 5. No crimping deformation or welding is performed on the shaft member 5, the two blade members 6A and 6B, or the tip member 7. The tightening axial force acting on the two blade members 6A and 6B when the tip member 7 is tightened to the shaft member 5 depends on the tightening torque applied when the tip member 7 is tightened to the shaft member 5. Therefore, when assembling the rotary blade 4, a torque wrench or the like is used to manage the tightening torque. The first blade member 6A and the second blade member 6B are sometimes referred to as the two blade members 6A and 6B or as individual blade members 6A and 6B.

[0027] In the rotating blade 4, the tip member 7 is tightened to the shaft member 5 by a specified tightening torque when the male threaded portion 711 of the tip member 7 and the female threaded portion 51 of the shaft member 5 are screwed together. The first blade member 6A is in a state where it can rotate freely relative to the shaft member 5 and the tip member 7 when an excess torque exceeding the specified tightening torque is applied to the first blade portion 62A. The second blade member 6B is in a state where it can rotate freely relative to the shaft member 5 and the tip member 7 when an excess torque exceeding the specified tightening torque is applied to the second blade portion 62B.

[0028] As shown in Figures 5 to 7, the tightening axial force when the male threaded portion 711 of the tip member 7 is tightened onto the female threaded portion 51 of the shaft member 5 maintains a specified phase difference in the circumferential direction C between the first cutting tool member 6A and the second cutting tool member 6B, thereby maintaining the assembled state of the rotary cutting tool 4. In the assembled state of the rotary cutting tool 4, the second cutting tool member 6B aligns with the first cutting tool member 6A at the tip side L2 in the axial direction L, with a phase difference of 90° in the circumferential direction C relative to the first cutting tool member 6A. In other words, in the assembled state of the rotary cutting tool 4, the second central portion 61B of the second cutting tool member 6B aligns with the first central portion 61A of the first cutting tool member 6A at the tip side L2 in the axial direction L, and the phase difference in the circumferential direction C between the first cutting tool member 6A and the second cutting tool member 6B is 90°. The phase difference is expressed as the difference between the angular position of the first cutting tool member 6A in the circumferential direction C and the angular position of the second cutting tool member 6B in the circumferential direction C.

[0029] As shown in Figure 7, the phase difference in the circumferential direction C between the two cutting tool members 6A and 6B may have an error within, for example, a range of ±5°. The phase difference can be set as the difference between the angular position in the circumferential direction C of the first reference line X1 passing through the first cutting tool member 6A and the angular position in the circumferential direction C of the second reference line X2 passing through the second cutting tool member 6B. The first reference line X1 and the second reference line X2 can be determined by various methods. For example, the first reference line X1 can be the line connecting the outermost radial position Y1 of one first blade portion 62A and the outermost radial position Y1 of the other first blade portion 62A. The second reference line X2 can be the line connecting the outermost radial position Y2 of one second blade portion 62B and the outermost radial position Y2 of the other second blade portion 62B. In this embodiment, the first reference line X1 of the first cutting tool member 6A and the second reference line X2 of the second cutting tool member 6B are perpendicular to each other, with a predetermined error tolerance.

[0030] (Two cutting tool components 6A, 6B) As shown in Figures 4 to 7, the first cutting tool member 6A and the second cutting tool member 6B are formed by bending a metal plate. The first central portion 61A of the first cutting tool member 6A and the second central portion 61B of the second cutting tool member 6B are arranged perpendicular to the central axis L0 of the shaft member 5. The pair of first wing portions 62A of the first cutting tool member 6A are formed by bending the first central portion 61A toward the base end side L1 in the axial direction L. The pair of second wing portions 62B of the second cutting tool member 6B are formed by bending the second central portion 61B toward the tip side L2 in the axial direction L. When the tip member 7 is tightened against the shaft member 5, the surface of the first central portion 61A and the surface of the second central portion 61B come into contact, the end face of the shaft member 5 and the surface of the first central portion 61A come into contact, and the end face of the head portion 72 of the tip member 7 (described later) and the surface of the second central portion 61B come into contact.

[0031] On the two first blade portions 62A of the first blade member 6A, cutting edge portions 621 are formed on the sides facing the drive shaft 20 and the rotating blade 4 in one rotational direction, in order to facilitate the crushing of solid matter contained in beverage raw materials. The cutting edge portions 621 are formed by thinning the thickness of the portion of the first blade portion 62A located on the side facing the rotational direction in the circumferential direction C in a sloping manner toward the rotational direction. The two first blade portions 62A are formed to have the same shape when viewed from the rotational direction.

[0032] On the two second blade portions 62B of the second blade member 6B, cutting edge portions 621 are formed on the sides facing the drive shaft 20 and the rotating blade 4 in one rotational direction, in order to facilitate the crushing of solids contained in beverage raw materials. The cutting edge portions 621 are formed by thinning the thickness of the portion of the second blade portion 62B located on the side facing the rotational direction in the circumferential direction C, in an inclined manner toward the rotational direction. The two second blade portions 62B are formed to have the same shape when viewed from the rotational direction.

[0033] In this embodiment, each cutting edge portion 621 of the first blade portion 62A and the second blade portion 62B has multiple wavy cutting edge shaped portions 622 formed thereon. However, each cutting edge portion 621 does not necessarily have multiple wavy cutting edge shaped portions 622 formed thereon.

[0034] The pair of first blade portions 62A are inclined toward the radial outer circumference and the base end L1 in the axial direction L at the same angle to each other. The pair of second blade portions 62B are inclined toward the radial outer circumference and the tip end L2 in the axial direction L at the same angle to each other. The width C in the circumferential direction of the pair of first blade portions 62A and the pair of second blade portions 62B decreases from the base position on the radial inner circumference toward the tip position on the radial outer circumference. The first blade portions 62A and the second blade portions 62B may be inclined to tilt toward the axial direction L and the circumferential direction C.

[0035] The radially outermost position Y1 of the pair of first blade portions 62A is radially further outward than the radially outermost position Y2 of the pair of second blade portions 62B. In other words, the maximum length of the pair of first blade portions 62A from the central axis L0 is greater than the maximum length of the pair of second blade portions 62B from the central axis L0. This configuration allows the rotating blade 4 to effectively crush solids contained in the beverage ingredients in the cup 8 when it collides with them during beverage production.

[0036] (Relationship between tightening axial force and tightening torque) As shown in Figure 8, there is a proportional relationship between the value of the tightening axial force acting between the tip member 7 and the shaft member 5 and the value of the tightening torque applied when tightening the tip member 7 to the shaft member 5. The deformation state of the metal materials constituting the tip member 7 and the shaft member 5 includes an elastic deformation region when the male threaded portion 711 of the tip member 7 and the female threaded portion 51 of the shaft member 5 undergo elastic deformation, and a plastic deformation region when the male threaded portion 711 of the tip member 7 and the female threaded portion 51 of the shaft member 5 undergo plastic deformation. The tightening axial force and tightening torque in the assembled state of the rotary cutting tool 4 are set so that the deformation state of the male threaded portion 711 and the female threaded portion 51 is within the elastic deformation region.

[0037] The relationship between tightening axial force and tightening torque is expressed by T = (K·d·F) / 1000, where F [N] is the tightening axial force, d [mm] is the nominal diameter of the screw, K [-] is the torque coefficient, and T [N·m] is the tightening torque. By managing the tightening torque T, the tightening axial force F can be set correctly. The value of the torque coefficient K changes due to the influence of friction between the male screw portion 711 and the female screw portion 51, and friction between the tip member 7 and the second cutting tool member 6B. The minimum and maximum values ​​of the tightening axial force F are set for when the torque coefficient K is set to the maximum value Kmax and when it is set to the minimum value Kmin. The tightening axial force F in the assembled state of the rotating cutting tool 4 should be set as the value between the minimum tightening axial force Fmin, which occurs when the tightening torque T is set to the minimum value Tmin and the torque coefficient K is set to the maximum value Kmax, and the maximum tightening axial force Fmax, which occurs when the tightening torque T is set to the maximum value Tmax and the torque coefficient K is set to the minimum value Kmin. The specified tightening torque is set to produce a specified tightening axial force between the minimum tightening axial force Fmin and the maximum tightening axial force Fmax.

[0038] (Tip member 7) As shown in Figure 6, the tip member 7 is made up of a bolt having a specially shaped head. The tip member 7 has a shaft portion 71 and a head portion 72 connected to the shaft portion 71. The portion of the shaft portion 71 at the tip side L2 in the axial direction L where the first cutting member 6A and the second cutting member 6B are positioned is formed in a cylindrical shape. The cylindrical shape includes a columnar shape. The male thread portion 711 is formed at the base end side L1 in the axial direction L of the shaft portion 71. The head portion 72 of the tip member 7 is positioned at the tip side L2 in the axial direction L of the second cutting member 6B.

[0039] As shown in Figures 4 and 6, the head portion 72 of the tip member 7 has a pair of parallel tip-side surfaces 721 that are parallel to each other and parallel to the axial direction L, and a pair of inclined tip-side surfaces 722 that project in a mountain shape toward the tip side L2 in the axial direction L. An external first tool T1 can be engaged with the pair of parallel tip-side surfaces 721. "External" in the external first tool T1 indicates that it is a maintenance tool that is not directly used when the beverage manufacturing apparatus 1 is in operation. The pair of parallel tip-side surfaces 721 allow the tip member 7 to be tightened and loosened relative to the shaft member 5. The pair of inclined tip-side surfaces 722 can deflect solid matter contained in beverage raw materials that collide with the head portion 72 of the tip member 7 in the radial direction during beverage manufacturing. The head portion 72 of the tip member 7 functions as a tightenable bolt by providing a flat plate portion 720 that can be engaged with the first tool T1 relative to a cylindrical material.

[0040] The shaft portion 71 of the tip member 7 is inserted through the insertion hole 611 of the first central portion 61A of the first cutting tool member 6A and the insertion hole 611 of the second central portion 61B of the second cutting tool member 6B. The pair of tip-side parallel surfaces 721 are formed as the main planes of the flat plate portion 720, which is left with the central axis L0, by cutting out the head portion 72 from both radial sides, leaving the base end portion L1 in the axial direction L. In other words, the pair of tip-side parallel surfaces 721 of the flat plate portion 720 are formed by removing the tip-side portion L2 in the axial direction L of the head portion 72 from both radial sides. The base end portion L1 in the axial direction L of the head portion 72 functions as a seating portion that sits on the second cutting tool member 6B when the tip member 7 is fastened to the shaft member 5. The central axis L0 refers to the central axis that passes through the centers of the shaft portion 71 and the head portion 72 of the tip member 7.

[0041] The pair of tip-side inclined surfaces 722 are inclined radially at the tip side L2 in the axial direction L of the flat plate portion 720, with a phase difference of 90° in the circumferential direction C relative to the radial direction in which the pair of tip-side parallel surfaces 721 are aligned. In other words, the pair of tip-side inclined surfaces 722 are inclined radially perpendicular to the specific radial direction in which the pair of tip-side parallel surfaces 721 are aligned, at the tip side L2 in the axial direction L of the flat plate portion 720. This configuration allows for a larger length of the pair of tip-side inclined surfaces 722, making it easier to deflect solid objects that collide with the head portion 72 of the tip member 7 in the radial direction during beverage production.

[0042] In this embodiment, the pair of tip-side parallel surfaces 721 and the pair of tip-side inclined surfaces 722 are formed by cutting out a conical tip portion formed on a cylindrical material from both radial sides, leaving a portion on the base end side L1 in the axial direction L. The pair of tip-side inclined surfaces 722 are formed from the remaining portion of the conical tip portion. With this configuration, the tip member 7 can be easily manufactured by a machine tool such as a lathe that processes a rotating workpiece with a cutting tool.

[0043] To prevent the tip member 7 from loosening when the rotating blade 4 rotates, the tightening direction of the tip member 7 with respect to the shaft member 5 is opposite to the rotational direction of the drive shaft 20 and the rotating blade 4. In this embodiment, when viewed from the tip side L2 in the axial direction L, the tightening direction of the tip member 7 is clockwise, and the rotational direction of the drive shaft 20 and the rotating blade 4 is counterclockwise when viewed from the tip side L2 in the axial direction L. Alternatively, when viewed from the tip side L2 in the axial direction L, the tightening direction of the tip member 7 may be counterclockwise, and the rotational direction of the drive shaft 20 and the rotating blade 4 may be clockwise.

[0044] (Other configurations of the tip member 7) The tip member 7 may be formed in various shapes having a pair of tip-side parallel surfaces 721 and a pair of tip-side inclined surfaces 722. For example, as shown in Figure 9, the pair of tip-side parallel surfaces 721 may be formed as the inner wall surfaces of a concave portion in which the central part including the central axis L0 of the head portion 72 is cut out along a specific radial direction. In this case, the pair of tip-side inclined surfaces 722 may be formed in the remaining portion aligned radially perpendicular to the specific radial direction. In this case as well, the pair of tip-side parallel surfaces 721 and the pair of tip-side inclined surfaces 722 may be formed by cutting out the central portion including the central axis L0 of the conical tip portion of a cylindrical material along a specific radial direction, leaving the base end portion L1 in the axial direction L. The pair of tip-side inclined surfaces 722 may be formed from the remaining portion of the conical tip portion. Similar effects and advantages to the tip member 7 of this embodiment can be obtained with other configurations of the tip member 7.

[0045] (Shaft member 5) As shown in Figures 2 and 6, the rotating blade 4 is detachable from the drive shaft 20 for replaceability. The rotating blade 4 is detachable from the drive shaft 20 in an assembled state in which the shaft member 5, the two blade members 6A and 6B, and the tip member 7 are integrated. The shaft member 5 has the function of tightening the tip member 7 and the function of tightening to the drive shaft 20. The shaft member 5 of the rotating blade 4 is screwed onto the tip of the drive shaft 20. In this embodiment, a female threaded portion 54 is formed on the base end side L1 in the axial direction L of the shaft member 5, and a male threaded portion 201 is formed on the tip side L2 in the axial direction L of the drive shaft 20. Alternatively, a male threaded portion may be formed on the base end side L1 in the axial direction L of the shaft member 5, and a female threaded portion may be formed on the tip side L2 in the axial direction L of the drive shaft 20. A pair of parallel surfaces 202 are formed on the tip side L2 in the axial direction L of the drive shaft 20, into which an external third tool T3 can engage.

[0046] The shaft member 5 is used to connect the two cutting tool members 6A and 6B to the drive shaft 20. On the base end side L1 of the shaft member 5 in the axial direction L, a pair of base end parallel surfaces 52 are formed, parallel to the axial direction L and parallel to each other, avoiding the axial direction Lx arrangement range Lx of the pair of first blade portions 62A. An external second tool T2 can be engaged with the pair of base end parallel surfaces 52. With this configuration, the axial direction Lx arrangement range Lx of the pair of first blade portions 62A and the formation position of the pair of base end parallel surfaces 52 in the axial direction L are offset in the axial direction L. When an operator uses the second tool T2, they bring the second tool T2 closer to the pair of base end parallel surfaces 52 and engage it with the pair of base end parallel surfaces 52. At this time, it is possible to make it difficult for the second tool T2 to come into contact with the first blade portions 62A.

[0047] The axial L arrangement range Lx of the first blade portion 62A refers to the length range occupied by the first cutting tool member 6A in the axial direction L. In other words, the axial L arrangement range Lx of the first blade portion 62A refers to the projected range when the outer shape of the first blade portion 62A is projected radially toward the inner circumference towards the shaft member 5. The term "external" in the external second tool T2 and external third tool T3 indicates that they are maintenance tools not directly used in the operation of the beverage manufacturing apparatus 1.

[0048] A flange 53 is formed on the base end L1 in the axial direction L of the pair of base-side parallel surfaces 52 to prevent the rotating blade 4 from falling off the second tool T2 that engages with the pair of base-side parallel surfaces 52 when attaching or detaching the rotating blade 4 to the drive shaft 20. The pair of base-side parallel surfaces 52 are not formed up to the base end position in the axial direction L of the shaft member 5. The flange 53 is formed at the end of the base end L1 in the axial direction L where the pair of base-side parallel surfaces 52 are not formed.

[0049] As shown in Figure 5, the base-side parallel surfaces 52 may be formed at four locations in the circumferential direction C, with a phase difference of 90° from each other. In this embodiment, as shown in Figures 3 and 4, one of the four base-side parallel surfaces 52 is used as an information display surface 52A for marking or printing the manufacturing number of the rotary cutting tool 4. The information display surface 52A is formed from the base-side L1 portion in the axial direction L of the shaft member 5 to the arrangement range Lx in the axial direction L of the pair of first blade portions 62A. The second tool T2 can engage with the base-side parallel surfaces 52 and the information display surface 52A, which are arranged parallel to each other. Even in this case, the second tool T2 can only be engaged with the information display surface 52A up to the formation position of the base-side parallel surfaces 52 in the axial direction L. Therefore, it is possible to make it difficult for the second tool T2 to come into contact with the first blade portions 62A.

[0050] As shown in Figure 6, the shaft member 5 in this embodiment is formed by creating female threaded portions 51 and 54 on both the tip side L2 and the base side L1 in the axial direction L of a hollow hole in a cylindrical material having a hollow hole. By using a cylindrical material having a hollow hole, the shaft member 5 can be easily manufactured.

[0051] (Other configurations of shaft member 5 and tip member 7) A male threaded portion may be provided on the tip side L2 of the shaft member 5, and a female threaded portion may be provided on the base side L1 of the tip member 7. In this case, it is preferable that the female threaded portion be provided in a pilot hole that does not penetrate the tip member 7 in the axial direction L. In this case, the tip member 7 has a shape similar to a cap nut.

[0052] (Other configurations of the rotary blade 4) The rotating blade 4 may have other blade members besides the two blade members 6A and 6B. For example, other blade members may be positioned between the first blade member 6A and the second blade member 6B, on the base end side L1 in the axial direction L of the first blade member 6A, or on the tip side L2 in the axial direction L of the second blade member 6B.

[0053] (Beverage manufacturing) In the beverage manufacturing apparatus 1, when manufacturing a beverage from beverage ingredients, solid materials such as ice, vegetables, and fruits, and liquid materials such as juice, dairy products, and liquid sugar are placed in cup 8. Cup 8 is then held in a cup protector 81, and the cup protector 81 is placed on a protector stand 37.

[0054] Next, when the operator operates the control panel 13, drinking water is injected into the cup 8 from the water nozzle 18 as needed. Also, as shown in Figure 2, the lifting motor 25 rotates the lifting screw 23, and the lifting base 22 descends in response to the rotation of the lifting screw 23. At an appropriate timing as the lifting base 22 descends, the rotation motor 21 starts rotating the drive shaft 20. When the cup cover 35, which is positioned on the lifting base 22, comes into contact with the top of the cup 8, the retaining spring 32 is compressed by being pushed by the spring guide 33 and the cup pipe 34. With the cup 8 held between the lifting side holding part 3 and the protector base 37, the rotating blade 4 descends into the cup 8.

[0055] At this time, solid matter collides with the two blade members 6A and 6B, and is crushed by the two blade members 6A and 6B. In addition, solid matter that collides with the head portion 72 of the tip member 7 is deflected radially outward by the tip-side inclined surface 722. Next, the rotation direction of the lifting motor 25 and the lifting screw 23 is switched as appropriate, causing the rotating blade 4 to reciprocate up and down while rotating. In this way, the solid matter and liquid matter in the cup 8 are stirred and mixed, and a beverage is produced.

[0056] Next, the rotating blade 4 rises due to the rotation of the lifting motor 25 and the lifting screw 23, and the lifting side holding part 3 separates from the cup 8. Then, the operator opens the opening / closing door 14 and removes the cup protector 81 in which the cup 8 is held, and removes the cup 8 from the cup protector 81. Then, when the opening / closing door 14 is closed by the operator, as shown in Figure 10, the rotating blade 4 descends again due to the rotation of the lifting motor 25 and the lifting screw 23, and the cleaning cover 36 descends to near the funnel 16. In this state, cleaning water is sprayed from the cleaning nozzle 15 toward the rotating blade 4, and the rotating blade 4 is cleaned. The cleaning water used to clean the rotating blade 4 is collected in the funnel 16 and drained to the outside of the beverage manufacturing apparatus 1 through the drainage path 17. After that, the rotating blade 4, the lifting side holding part 3, etc. rise to the standby position due to the rotation of the lifting motor 25 and the lifting screw 23.

[0057] (Attaching and detaching the rotary blade 4) As shown in Figure 11, when attaching the rotating blade 4 to the drive shaft 20 of the beverage manufacturing apparatus 1, the operator removes the cup pipe 34, cup cover 35, and cleaning cover 36 from the spring guide 33. In this state, the operator screws the female thread portion 54 of the shaft member 5 of the assembled rotating blade 4 onto the male thread portion 201 of the drive shaft 20. At this time, the operator engages the second tool T2 with the pair of base-side parallel surfaces 52 of the shaft member 5 and the third tool T3 with the pair of parallel surfaces 202 of the drive shaft 20. Then, the operator uses the second tool T2 and the third tool T3 to tighten the shaft member 5 of the rotating blade 4 to the drive shaft 20. When engaging the second tool T2 with the pair of base-side parallel surfaces 52, the position of the pair of base-side parallel surfaces 52 prevents the second tool T2 from contacting the first blade portion 62A. Afterward, the worker reattaches the cup pipe 34, cup cover 35, and cleaning cover 36 to the spring guide 33.

[0058] When removing the rotating blade 4 from the drive shaft 20 in the beverage manufacturing apparatus 1, the operator removes the cup pipe 34, cup cover 35, and cleaning cover 36 from the spring guide 33. In this state, the operator engages the second tool T2 with a pair of parallel surfaces 52 on the base end side of the shaft member 5 and the third tool T3 with a pair of parallel surfaces 202 on the drive shaft 20. Then, the operator uses the second tool T2 and the third tool T3 to loosen the shaft member 5 that is tightened to the drive shaft 20. When engaging the second tool T2 with the pair of parallel surfaces 52 on the base end side, the position of the pair of parallel surfaces 52 on the base end side prevents the second tool T2 from contacting the first blade portion 62A. When the rotating blade 4 is removed from the drive shaft 20, the flange portion 53 of the shaft member 5 is hooked onto the second tool T2. This prevents the rotating blade 4 from unexpectedly falling when it is removed from the drive shaft 20. Afterward, the worker reattaches the cup pipe 34, cup cover 35, and cleaning cover 36 to the spring guide 33.

[0059] (Effects and Benefits) In this embodiment of the beverage manufacturing apparatus 1, the blade members 6A and 6B constituting the rotating blade 4 are formed by dividing them into two blade members 6A and 6B. Each blade member 6A and 6B is aligned in the axial direction L, with their phases in the circumferential direction C differing by 90° from each other and intersecting. Furthermore, the pair of first blade portions 62A and the pair of second blade portions 62B have a configuration that protrudes radially outward from the first central portion 61A or the second central portion 61B at positions on opposite sides in the radial direction. Due to these configurations, in each blade member 6A and 6B, no internally angled external shape portion is formed between the first blade portions 62A or the second blade portions 62B, which would be a shape change portion where the shape changes to bend. As shown in Figure 12, the internally angled external shape portion N refers to an external shape portion formed near the boundary between blade portions 62 that are aligned at angles of 180° or less in the circumferential direction C, such as 90° and 120°.

[0060] Because no internally angled outer contours are formed, there are virtually no areas on each cutting tool member 6A and 6B where stress tends to concentrate. Therefore, stress concentration is less likely to occur on each cutting tool member 6A and 6B during beverage manufacturing, where beverages are produced from beverage raw materials. Furthermore, because no internally angled outer contours are formed, residual stress is less likely to occur on each cutting tool member 6A and 6B during processes such as cutting and bending that form the outer shape of each cutting tool member 6A and 6B. In addition, the magnitude of residual stress is less affected by variations between individual cutting tool members 6A and 6B.

[0061] Furthermore, the first cutting member 6A and the second cutting member 6B are not prevented from rotating relative to each other, and are subjected to a tightening axial force, maintaining a state in which they intersect each other in the circumferential direction C. Each cutting member 6A and 6B is tightened at a single point by the tip member 7 on the shaft member 5 and is sandwiched between the shaft member 5 and the tip member 7. In other words, there is no prevention of rotation of each cutting member 6A and 6B relative to the shaft member 5 and the tip member 7, and there are no shape-changing parts on each cutting member 6A and 6B for preventing rotation. This configuration also prevents the formation of areas on each cutting member 6A and 6B where stress tends to concentrate, making it less likely for stress to occur on each cutting member 6A and 6B during beverage manufacturing.

[0062] Furthermore, in this embodiment of the beverage manufacturing apparatus 1, two blade members 6A and 6B that are not equipped with anti-rotation features are intentionally used, and the tightening torque is set to tighten the tip member 7 to the shaft member 5, thereby controlling the tightening axial force generated in each blade member 6A and 6B when the tip member 7 is tightened to the shaft member 5. This tightening axial force maintains the assembled state of the rotating blade 4, preventing the first blade member 6A and the second blade member 6B from free-rotating. With this configuration, even when each blade member 6A and 6B of the rotating blade 4 is subjected to repeated stress due to collisions with solid matter contained in the beverage raw materials during beverage manufacturing, each blade member 6A and 6B is less likely to be damaged.

[0063] Furthermore, the two blade members 6A and 6B are held between the shaft member 5 and the tip member 7 by a tightening axial force due to a specified tightening torque. Therefore, under normal operating conditions of the beverage manufacturing apparatus 1, it is considered that the blade members 6A and 6B will not rotate freely. On the other hand, in emergencies of the beverage manufacturing apparatus 1, such as when solid materials of special hardness or size are used as beverage ingredients, it is conceivable that an excessive torque may be applied to at least one of the first blade portion 62A and the second blade portion 62B, causing at least one of the first blade member 6A and the second blade member 6B to rotate freely. When at least one of the first blade member 6A and the second blade member 6B rotates freely, the stress generated at the base position of the first blade portion 62A or the base position of the second blade portion 62B is released. This makes it less likely for damage to occur at the base position of the first blade portion 62A or the base position of the second blade portion 62B. Furthermore, after the first cutting tool member 6A or the second cutting tool member 6B has been rotating freely, the tightening of the tip member 7 to the shaft member 5 is loosened to return the free-rotating first cutting tool member 6A or the second cutting tool member 6B to its original position, thereby returning the rotating blade 4 to its initial state.

[0064] The blade components are formed from relatively thick steel plate material and were thought to be largely undamaged even in environments where solid objects repeatedly collide with them. However, during the beverage manufacturing process, it was discovered that some of the rotating blades 4 among the many rotating blades 4 were damaged at the base of the blade blade portion. It was concluded that this was not only due to the presence of areas where stress tends to concentrate, but also related to variations in the processing state and residual stress between individual blade components. Therefore, the rotating blade 4 of this embodiment employs a structure that minimizes variations in processing state and residual stress between individual blade components 6A and 6B. The rotating blade 4 of this embodiment is not simply formed by dividing the blade components 6A and 6B into two parts, but is realized through a novel idea of ​​maintaining the assembled state of the rotating blade 4 using only clamping axial force without any anti-rotation mechanism.

[0065] As described above, with the beverage manufacturing apparatus 1 of this embodiment, each blade component 6A, 6B of the rotating blade 4 is less likely to be damaged, and the durability of the rotating blade 4 is improved.

[0066] The present invention is not limited to these embodiments, and further different embodiments can be constructed without departing from the spirit of the invention. Furthermore, the present invention includes various modifications, modifications within the equivalent range, etc. Moreover, various combinations and forms of components conceivable from the present invention are also included in the technical concept of the present invention. [Explanation of Symbols]

[0067] 1 Beverage production equipment 11 Main frame 111 Information Department 12 cabinets 13. Control Panel 14 Opening and closing doors 15 Cleaning nozzles 16 Rohto 17 Drainage routes 18 water nozzles 2. Drive mechanism 20 Drive shaft 21 Rotary motor 22 Lifting base 23 Lifting screw 24 nuts 25 Lifting motor 3. Lifting / Lowering Side Holding Part (Holding Part) 31 Rotating Guide Tube 32 Retaining spring 33 Spring Guide 34 Cup Pipes 35 Cup Cover 36 Washing cover 37. Protector stand (holding part) 4 Rotary blades 5 Shaft member 51 Female thread section 52 Parallel surface on the base side 52A Information display screen 53 Guard section 54 Female thread section 6. Cutting tool components 6A First cutting tool component 6B Second cutting tool component 61A 1st center part 61B 2nd center part 611 Through hole 62A First wing section 62B Second wing section 621 Cutting edge 622 Blade tip 7. Tip component 71 Shaft part 711 Male threaded section 72 Head part 720 Flat plate part 721 Parallel surface on the tip side 722 Tip side inclined surface 8 cups 81 Cup Protector T1 1st tool T2 2nd tool T3 3rd tool L axis direction L0 center axis L1 Proximal end L2 tip side C circumferential direction X1 1st reference line X2 2nd reference line

Claims

1. A holding part (3, 37) for holding a cup (8) into which beverage ingredients can be placed, A drive shaft (20) having a rotating blade (4) positioned inside the cup held in the holding part, The system includes a drive mechanism (2) that rotates and reciprocates the drive shaft, The rotating blade is constructed using a shaft member (5) connected to the axial end (L2) of the drive shaft, blade members (6A, 6B) connected to the axial end of the shaft member, and a tip member (7) for maintaining the connection of the blade members to the shaft member. Either the shaft member or the tip member is provided with a male threaded portion (711), and the other is provided with a female threaded portion (51). The aforementioned cutting member is A first cutting tool member (6A) having a first central portion (61A) through which the male screw portion is inserted, and a pair of first wing portions (62A) that protrude from the first central portion at opposite radial positions, inclined toward the radial outer circumference and the axial base end (L1), A second cutting tool member (6B) has a second central portion (61B) through which the male screw portion is inserted, and a pair of second wing portions (62B) that protrude from the second central portion at opposite radial positions, inclined toward the radial outer circumference and the axial tip, with the second central portion aligning with the first central portion in the axial direction, It is constructed using The beverage manufacturing apparatus (1) is characterized in that the first cutting member and the second cutting member are kept from rotating freely by a tightening axial force generated when the male thread portion and the female thread portion are screwed together and the tip member is tightened on the shaft member.

2. The beverage manufacturing apparatus according to claim 1, wherein the first cutting member and the second cutting member are maintained in a state where they intersect each other in the circumferential direction by the tightening axial force, without being prevented from rotating relative to each other.

3. The second cutting tool member is aligned with the first cutting tool member at its axial tip side, with a circumferential phase difference of 90° relative to the first cutting tool member. The beverage manufacturing apparatus according to claim 1 or 2, wherein the outermost radial position (Y1) of the pair of first blade portions is located radially further outward than the outermost radial position (Y2) of the pair of second blade portions.

4. The aforementioned tip member is A pair of parallel end surfaces (721) are provided parallel to each other and parallel to the axial direction, and into which an external tool (T1) can engage; A pair of tip-side inclined surfaces (722) that protrude in a mountain-like shape toward the tip side in the axial direction, A beverage manufacturing apparatus according to any one of claims 1 to 3, comprising:

5. The male thread portion is provided on the tip member, and the female thread portion is provided on the shaft member. The tip member is composed of a shaft portion (71) having a male screw portion and inserted through the insertion hole in the first central part and the insertion hole in the second central part, and a head portion (72) connected to the shaft portion and positioned on the axial tip side of the second cutting tool member. The pair of parallel surfaces on the tip side are formed as the main plane of the flat plate portion (720) that remains, including the central axis (L0), by cutting out the head portion from both radial sides, leaving the base end portion in the axial direction. The beverage manufacturing apparatus according to claim 4, wherein the pair of tip-side inclined surfaces are inclined in the radial direction at the axial tip side of the flat plate portion with a phase difference of 90° in the circumferential direction relative to the radial direction in which the pair of tip-side parallel surfaces are aligned.

6. The shaft member is screwed onto the axial end of the drive shaft, The axial base end portion of the shaft member has a pair of base end parallel surfaces (52) formed parallel to the axial direction and parallel to each other, avoiding the axial arrangement range (Lx) of the pair of first wing portions, and into which an external tool (T2) can engage. A beverage manufacturing apparatus according to any one of claims 1 to 5, wherein a flange (53) is formed on the axial base end side of the pair of base end parallel surfaces to prevent the rotating blade from falling from the tool that engages with the pair of base end parallel surfaces when attaching or detaching the rotating blade to the drive shaft.

7. The drive shaft is positioned to hang downwards. The shaft member is connected to the lower end of the drive shaft, The beverage manufacturing apparatus according to any one of claims 1 to 6, wherein the drive mechanism is configured to perform the operation of the rotating blade descending into the cup and the operation of the rotating blade reciprocating up and down within the cup, and at the same time, the rotating blade rotates.

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