JP5333627B2 - Beverage extractor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a beverage extraction device that obtains a high-quality beverage with extremely less residues while still keeping good maintainability, and also properly determines that paper is out. <P>SOLUTION: The beverage extraction device includes: a drive unit 22; an extraction unit 21 for extracting a beverage by being driven by a drive source 151; a paper holder 201 for holding a continuous paper filter P; and a paper pull-out mechanism 160 for pulling out the paper filter P from the paper holder 201 by being driven by the drive source 151, and sending the filter to the extraction unit 21; a lock mechanism 94 having a movable part 202 that follows a roll Pr that reduces the diameter as the paper filter P is used, and locking the paper pull-out mechanism 160 to be inoperable when the movable part 202 reaches a predetermined position; and an out-of-paper determiner 7 for determining that paper is out when the paper pull-out mechanism 160 is locked. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a beverage extraction apparatus that is incorporated in a cup-type vending machine, a beverage dispenser, and the like and extracts coffee, tea-based beverages, and the like using raw materials such as coffee beans and tea leaves.

  As a conventional beverage extraction device, for example, one disclosed in Patent Document 1 is known. This beverage extraction device is for extracting coffee, and includes a main body unit and a beverage extraction unit detachably attached to the main body unit. The main unit has a motor and a drive gear that is rotationally driven by the motor. On the other hand, the beverage extraction unit substantially extracts coffee, and includes a cylinder, upper and lower pistons, a pair of left and right cam gears, a driven gear, and the like. A filter for filtering coffee extracted in the cylinder is fixed to the upper surface of the lower piston of the beverage extraction unit. At the time of coffee extraction, the motor on the main unit side operates, and the power is transmitted to the driven gear on the beverage extraction unit side via the drive gear. Then, as both driven gears rotate as the driven gear rotates, the cylinder and the upper piston are appropriately driven by both cam gears, and coffee is extracted in the cylinder. This extracted coffee is filtered by the filter of the lower piston, passes through the interior of the piston, and is supplied to the cup.

JP-A-2005-245860

  As described above, in this beverage extraction device, since the beverage extraction unit is detachably attached to the main body unit, the beverage extraction unit is removed from the main body unit during the maintenance, and is relatively soiled by washing it. It is possible to easily wash the easy beverage extraction unit. However, since the coffee extracted in the cylinder is filtered by a filter fixed to the lower piston, the filtration may be insufficient. In other words, since fixed type filters generally have a large number of pores and meshes, fine particles of raw materials smaller than the pores and mesh eyes permeate the filter, and are supplied to the coffee supplied to the cup. Residue tends to remain. In particular, a beverage provided in a transparent cup or the like such as iced coffee has a poor appearance, and the quality and merchantability are reduced.

  The present invention has been made in order to solve the above-described problems. A high-quality beverage with very little residue can be obtained while ensuring good maintainability. An object of the present invention is to provide a beverage brewing apparatus that can appropriately determine the piece of paper without using an electrical component used to determine the content.

  In order to achieve the above object, the invention according to claim 1 is a beverage extraction device for extracting a beverage using raw materials and water, a drive unit having a drive source, and a detachable attachment to the drive unit. An extraction unit for extracting a beverage by being driven by a drive source and a continuous paper filter for filtering the beverage are held, and a paper holder attached to the extraction unit is driven by the drive source By pulling out the paper filter from the paper holder and sending it out to the extraction unit, the used part of the paper filter used for the beverage filtration is moved to the outside of the extraction unit and continues to the used part of the paper filter. And a paper drawer mechanism that moves unused parts to the extraction unit. -The filter has a roll part that is wound into a roll and is rotatably supported by the paper holder. The filter comes into contact with the outer peripheral surface of the roll part, and the diameter of the roll part decreases with the use of the paper filter. It has a movable member that can move while following, and when the movable member reaches a predetermined position, it locks the paper drawer mechanism in an inoperable state, and when the paper drawer mechanism is locked, it runs out of paper. It is further provided with the paper piece determination means to determine.

  According to this configuration, since the extraction unit that extracts the beverage by being driven by the drive source is detachably attached to the drive unit having the drive source, the extraction unit is removed from the drive unit at the time of maintenance. Thus, the extraction unit can be easily cleaned, and thus good maintainability can be obtained. Moreover, the continuous paper filter is hold | maintained at the paper holder attached to the extraction unit. Since a paper filter is generally made by finely weaving vegetable fibers and the like, a high-quality beverage with very little residue can be obtained by using such a paper filter for beverage filtration. In addition, the paper filter is pulled out of the paper holder by the paper pulling mechanism and sent to the extraction unit, so that the used part used for filtering the beverage moves to the outside of the extraction unit together with the raw material after extraction, The unused part following the used part of the paper filter moves to the extraction unit. That is, the used part of the paper filter is discarded together with the raw material after extraction, and the unused part of the paper filter is set in the extraction unit in preparation for the next extraction. In this way, the paper pulling mechanism for pulling out the paper filter from the paper holder is driven by a driving source common to the extraction unit provided in the driving unit, so a dedicated driving source that drives only the paper pulling mechanism is used. Compared to the case, the beverage extraction device itself can be manufactured at low cost.

  Moreover, according to said structure, the paper filter has the roll part rotatably supported by the paper holder, and the diameter of a roll part reduces gradually as it is used for filtration of a drink. . The lock mechanism has a movable member that contacts the outer peripheral surface of the roll unit and is movable while following the roll unit. When the movable member reaches a predetermined position, the paper pulling mechanism is Lock in an inoperable state. That is, when the diameter of the roll portion of the paper filter is reduced to a size that should be determined as out of paper, the paper drawing mechanism is locked by the locking mechanism. When the paper drawer mechanism is locked, it is determined that the paper is out by the paper out determination unit. In this way, since paper breakage is determined depending on whether or not the paper drawer mechanism is locked, conventionally used electrical components such as sensors and switches for detecting the diameter of the roll part are generally used to determine paper breakage. Without using it, it is possible to appropriately determine that the paper has run out.

  According to a second aspect of the present invention, in the beverage extraction device according to the first aspect, the drive source is a motor, and the paper breakage determining means is detected by a motor current detecting means for detecting a current value flowing through the motor. And a lock determination unit that determines whether or not the paper drawer mechanism is locked by determining whether or not the motor is locked in a non-rotatable state based on the current value.

  According to this configuration, the current value flowing through the motor as a drive source for driving the paper drawing mechanism is detected, and it is determined based on the current value whether the motor is locked in a non-rotatable state. As described above, since the paper drawer mechanism is driven by a motor, when the paper drawer mechanism is locked so as to be inoperable, the motor that drives the paper drawer mechanism is also locked in a non-rotatable state. Generally, a motor has a characteristic that a torque generated when a voltage is applied is proportional to a flowing current value. Therefore, when the rotation speed of the motor to which the voltage is applied is 0, that is, when the motor is locked, the torque is maximized and the current value is also maximized. Therefore, it is possible to easily determine whether the motor is locked based on the current value of the motor, and based on the determination result, it is possible to easily determine whether the paper drawer mechanism is locked.

It is a figure which shows typically the internal structure of the cup-type vending machine provided with the drink extraction apparatus by one Embodiment of this invention being applied to the coffee extraction apparatus. It is a block diagram which shows control of the various apparatuses in a vending machine. It is a perspective view which shows a coffee extraction apparatus. It is a perspective view which shows the coffee extraction apparatus of the state which isolate | separated the drip unit, the paper unit, and the drive unit. It is a perspective view showing a drip unit in the state where a cylinder was removed from a cylinder holder. It is a figure which shows a cylinder, (a) is a top view, (b) is a side view. It is a figure which shows a cylinder holder, (a) is a top view, (b) is a front view. It is a perspective view which shows the drip unit which abbreviate | omitted the outer side cover of the cylinder holder, (a) shows the state when it sees from the front side, (b) shows the state when it sees from the back side. It is a side view which shows the internal structure of the right side wall of a cylinder holder, (a) shows the state which abbreviate | omitted the outer cover, (b) shows the state which displayed the cam groove of the cam disc of (a). It is a figure which expands and shows the cam disc which displayed the cam groove. It is a figure which shows the state which cut | disconnected the cylinder holder shown in FIG. 7 along the AA line. It is a side view which shows the internal structure of the right side wall of a cylinder holder, (a) shows the state before pushing down a removal lever, (b) shows the state after pushing down a removal lever. It is a figure which shows the state which cut | disconnected the cylinder holder shown in FIG. 7 along the BB line, (a) shows the state which removed the cylinder from the cylinder holder, (b) shows the state which attached the cylinder to the cylinder holder. . It is a figure which shows a paper unit and a paper drawer | drawing-out mechanism, and shows the state in which paper exists fully. It is a figure which shows a paper unit and a paper drawer mechanism, and shows the state of a piece of paper. It is a front view which shows a drive unit, (a) is an external view, (b) is an internal structure figure. It is a right view which shows a drive unit, (a) is an external view, (b) is an internal structure figure. It is a left view which shows a drive unit, (a) is an external view, (b) is an internal structure figure. It is a rear view which shows a drive unit, (a) is an external view, (b) is an internal structure figure. It is a top view which shows a drive unit, (a) is an external view, (b) is an internal structure figure. It is a perspective view which shows a drive unit, and shows the state which removed the hot water supply nozzle from the cover main body while removing the cover main body of a cylinder head cover from a drive unit. It is a figure which shows a cylinder head and its periphery, (a) is a top view, (b) is a right side view, (c), while rotating the cylinder head so that the lower surface of the cylinder head faces forward, The state where the auxiliary material chute is removed is shown. It is a figure which shows a paper drawer and cylinder head drive mechanism, and its periphery, (a) shows the state when it sees from diagonally upward, (b) shows the state when it sees from diagonally below. It is a figure for demonstrating operation | movement of the cylinder head by a paper drawer and cylinder head drive mechanism, (a) is the state in which the cylinder head was located in the standby position, (b) was the cylinder head located in the cylinder closed position Indicates the state. It is a figure for demonstrating the paper extraction operation | movement by a paper extraction and cylinder head drive mechanism, (a) is the state in which paper extraction operation | movement is performed because an output shaft rotates in a predetermined direction, (b) is This shows a state where the paper drawing operation is not executed as the output shaft rotates in the opposite direction. It is explanatory drawing for demonstrating operation | movement of a coffee extraction apparatus in order, (a) is a standby state, (b) is the state which sealed the lower surface of the cylinder with the filter block, (c) is the state which the cam disk stopped temporarily Indicates. FIG. 27 is an explanatory diagram following FIG. 26, (a) is a state in which the cylinder head is close to the cylinder, (b) is a state in which the cylinder head is sealing the upper surface of the cylinder, and (c) is a head guide shaft after completion of extraction. The state which lifted the cylinder head with the cam disk via is shown. It is explanatory drawing following FIG. 27, (a) shows the state which the filter block and cylinder head returned to the standby position after completion | finish of extraction, (b) shows the state by which the paper filter was pulled out. It is a table | surface which shows the relationship between the rotation angle of each pinch and cam disc in the operation state of a coffee extraction apparatus.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 schematically shows the internal structure of a cup-type vending machine equipped with a beverage extraction device according to an embodiment of the present invention, applied to a coffee extraction device. As shown in the figure, this cup type vending machine 1 uses a coffee extraction device 2 to extract coffee using coffee beans and hot water, and provides regular coffee in a cup to the purchaser. In the following description, first, the internal structure of the cup-type vending machine 1 will be described, and then the coffee extraction device 2 will be described in detail.

  As shown in FIG. 1, a cup-type vending machine 1 includes a coffee extraction device 2, a raw material supply device 3 and a hot water supply device 4 for supplying a predetermined amount of coffee powder and hot water to the coffee extraction device 2, respectively, and coffee. A mixing bowl 5 for mixing the coffee extracted by the extraction device 2 together with cream and sugar, and a cream / sugar supply device 6 for supplying cream and sugar to the mixing bowl 5 are provided. Further, as shown in FIG. 2, these are controlled by a control device 7 (paper breakage determination means, motor current detection means, lock determination means) having a microcomputer.

  The raw material supply device 3 includes a plurality of canisters 11 (only two are shown in FIG. 1) for storing coffee beans, and a mill 12 for grinding coffee beans. At the time of sale, the coffee beans supplied from the canister 11 to the mill 12 via the chute 11a are ground into a powder by the mill 12, and the coffee powder (hereinafter referred to as “raw material”) is extracted via the chute 12a to the coffee extraction device. 2 is supplied. The hot water supply device 4 includes a hot water tank 13 for storing hot water, and at the time of sale, a predetermined amount of hot water is supplied from the hot water tank 13 to the coffee extraction device 2 via the hot water supply tube 13a. The mixing bowl 5 stirs the coffee extracted by the coffee extraction device 2 together with a predetermined amount of cream and sugar supplied from the cream / sugar supply device 6 via the chute 6a. Thereafter, the coffee in the mixing bowl 5 is supplied to the cup C via the beverage tube 5 a connected to the mixing bowl 5.

  Next, the coffee extraction device 2 will be described in detail. 3 and 4 show the coffee brewing device 2. As shown in both figures, the coffee brewing device 2 includes a drip unit 21 (extraction unit) and a paper unit 20 for extracting coffee, and a drive unit 22 that drives the drip unit 21. The drive unit 22 is fixed to the vending machine 1 with screws or the like, and a drip unit 21 is attached to the drive unit 22 and a paper unit 20 is detachably attached to the drip unit 21.

  The drip unit 21 is composed of a cylinder 23 that is supplied with raw materials and hot water and extracts coffee therein, and a cylinder holder 24 that detachably accommodates the cylinder 23. FIG. 5 shows a state where the cylinder 23 is removed from the cylinder holder 24. The cylinder 23 is made of plastic and is formed in a cylindrical shape extending in the vertical direction and having an upper surface and a lower surface opened as shown in FIG. In addition, a handle 25 and a guide portion 26 that are used when the cylinder 23 is attached to and detached from the cylinder holder 24 are provided on the outer peripheral surface of the cylinder 23. The guide part 26 is provided with two upper and lower guide parts 26, 26 that are provided vertically apart from each other at a predetermined interval and are formed vertically symmetrical.

  Each guide portion 26 is configured in two upper and lower stages by an inner guide portion 27 near the center of the cylinder 23 and an outer guide portion 28 near the open end of the cylinder 23. The inner guide portion 27 extends horizontally from a position slightly closer to the handle 25 than the center of the cylinder 23 to the vicinity of the outer peripheral surface on the opposite side of the handle 25 of the cylinder 23, and the planar shape is formed in a concave shape. . On the other hand, the outer guide portion 28 is formed slightly smaller than the inner guide portion 27. Further, a base end portion (end portion on the handle 25 side) 27 a of the inner guide portion 27 is formed so as to extend beyond the outer guide portion 28 to the open end side of the cylinder 23. As described above, since the cylinder 23 is formed symmetrically in the vertical direction, it can be attached to the cylinder holder 24 regardless of the vertical direction.

  As shown in FIG. 7, the cylinder holder 24 is provided in the frame 31, a box-shaped frame 31 having a cylinder accommodating portion 24 a on the inside, a filter block 32 provided in a lower part in the frame 31 so as to be movable up and down. And a cylinder catcher 34 that holds the cylinder 23 accommodated in the cylinder accommodating portion 24a from the left and right sides, and a front cover 35 that is provided on the front surface of the frame 31 so as to be openable and closable.

  The frame 31 includes left and right side walls 41, 41 facing each other at a predetermined interval, and a back wall 42 and a bottom wall 43 provided so as to extend between the rear end portions and the lower end portions of the side walls 41, 41, respectively. It has a box shape with the front and top surfaces open. Further, a front upper cover 36 that connects the side walls 41 and 41 is provided at the upper end of the front side of the left and right side walls 41 and 41. Although not shown, the bottom wall 43 is formed in a lattice shape by a plurality of rod-shaped support members.

  Each side wall 41 is formed in a substantially rectangular shape on the side surface, a case-shaped side wall main body 44 whose outer side surface is open, and an outer cover screwed to the side wall main body 44 so as to cover the open side surface. 45. As shown in FIG. 8, a cylinder opening / closing mechanism 51 that opens and closes the lower surface and the upper surface of the cylinder 23 by driving the filter block 32 and a cylinder head 111 described later is provided in each side wall 41. . Since the left and right cylinder opening / closing mechanisms 51 and 51 are substantially symmetrical in the left and right side walls 41 and 41, the following description will focus on what is built in the right side wall 41.

  As shown in FIGS. 8 and 9, the cylinder opening / closing mechanism 51 is rotatably supported by a support shaft 44 a protruding at a predetermined position near the center in the side wall main body 44, and has first and second cams having a predetermined shape. A cam disk 55 having grooves 53, 54 and a lower part in the side wall body 44 are slidable in the vertical direction, engage with the first cam groove 53 of the cam disk 55 and are connected to the cylinder block 32. A slider 56 and a support shaft 44b protruding at a predetermined position in the upper portion of the side wall main body 44 are rotatably supported, engage with a second cam groove 54 of the cam disc 55, and a cylinder head 111 described later. A cylinder head lock member 57 for locking the cylinder 23 in a pressed state is provided.

  The cam disc 55 is formed in a disc shape having a predetermined diameter and thickness, and a gear portion 55a is formed on the entire peripheral surface. Further, a convex portion 55b that protrudes slightly in the radial direction by approximately 1/2 arc is provided at the peripheral portion of the cam disk 55 on the outer cover 45 side. Further, the first and second cam grooves 53 and 54 are provided on the side surface of the cam disk 55 on the side wall main body 44 side.

  As shown in FIG. 10, the first cam groove 53 is provided at the peripheral edge portion of the side surface of the cam disk 55, and is substantially circular in the arc shape centering on the support shaft 44 a of the cam disk 55 and counterclockwise. The outer cam portion 61 extending in this manner, the driving cam portion 62 connected to the outer cam portion 61 and extending in an arc shape toward the support shaft 44a, and the arc shape centering on the support shaft 44a connected to the drive cam portion 62 And an inner cam portion 63 extending so as to make one round in the vicinity of the support shaft 44a. A recess 61a is formed at the tip of the outer cam portion 61 of the first cam groove 53 so as to be recessed toward the support shaft 44a. On the other hand, the second cam groove 54 is provided on the inner side of the outer cam portion 61 of the first cam groove 53, has an arc shape centering on the support shaft 44a, and counterclockwise from the vicinity of the distal end portion of the outer cam portion 61. An outer cam portion 64 that extends in a substantially ¾ arc shape, a drive cam portion 65 that extends to the outer cam portion 64 and extends toward the support shaft 44a, and that continues to the drive cam portion 65, with the support shaft 44a as the center. It is comprised with the inner side cam part 66 extended in circular arc shape.

  As shown in FIG. 9B, the slider 56 extends in the vertical direction and has a lower portion that widens downward, and has a substantially convex shape. An engagement convex portion 56 a that protrudes toward the cam disk 55 is provided at the upper end portion of the slider 56, and the engagement convex portion 56 a is slidable in the first cam groove 53 of the cam disk 55. Is engaged. Two connecting shafts 71, 71 that connect the slider 56 and the filter block 32 are fixed to the lower end of the slider 56. Both the connecting shafts 71, 71 extend in parallel with each other in the left-right direction (the front-back direction in the drawing in FIG. 9) with a space in the front-rear direction (left-right direction in FIG. 9). Each connecting shaft 71 passes through a long hole 44 c extending in the vertical direction of the side wall main body 44, and one end is fixed to the slider 56, while the other end is fixed to the slider 56 of the left cylinder opening / closing mechanism 51. Yes. Therefore, the filter block 32 is supported by the left and right sliders 56 and 56 via both connecting shafts 71 and 71. In addition, a long hole 56b extending in the vertical direction is formed in the center of the slider 56, and a support shaft 44d protruding at a predetermined position in the lower portion of the side wall body 44 is slidable in the long hole 56b. Has penetrated.

  The slider 56 configured as described above slides in the vertical direction while being guided between the pair of guide rails 44e and 44e extending in the vertical direction in the side wall main body 44 as the cam disk 55 rotates. Along with this, the filter block 32 moves up and down to open and close the lower surface of the cylinder 23. Specifically, the cam disk 55 shown in FIG. 8A and FIG. 9 rotates in the clockwise direction in both drawings, and the engaging convex portion 56 a of the slider 56 becomes the outer cam portion 61 of the first cam groove 53. When the drive cam 62 is slid from the inner cam 63 toward the inner cam 63, the slider 56 is raised. Then, when the engagement convex portion 56a of the slider 56 reaches the inner cam portion 63, the filter block 32 sandwiches a paper filter P, which will be described later, between the cylinder 23 and in close contact with the lower surface thereof. It closes (refer FIG.26 (b)). On the other hand, from this state, the cam disk 55 rotates counterclockwise and the slider 56 descends, so that the filter block 32 also descends, thereby opening the lower surface of the cylinder 23 (FIG. 28 (a)). )reference).

  As shown in FIGS. 7, 8 and 11, the filter block 32 is provided so as to surround a circular mesh filter 72 formed slightly smaller than the inner diameter of the cylinder 23, and the mesh filter 72. A wide ring-shaped packing 73 that is formed flat and has an outer diameter larger than that of the lower surface of the cylinder 23, and a block-shaped support member 74 that supports these on the upper surface and has a passage that communicates vertically. Has been. The left and right side walls 74a, 74a of the support member 74 are configured to extend upward from the mesh filter 72, and function as guides in the left-right direction of the paper filter P. As described above, the filter block 32 moves up and down as the slider 56 slides in the vertical direction. When the lower surface of the cylinder 23 is closed, the upper surface of the packing 73 is in a state where the paper filter P is sandwiched between the cylinder 23. , Abuts on the peripheral edge of the lower surface and seals it. Further, a filter block tube 32a (see FIGS. 1 and 7) is connected between the support member 74 of the filter block 32 and the joint hose 40 (see FIG. 8) provided at the lower rear end of the right side wall 41. ing. The joint hose 40 is connected to a joint hose 120 described later on the drive unit 22 side in a state where the drip unit 21 is attached to the drive unit 22.

  As shown in FIGS. 8A and 9, a waste liquid tube 50 connected to the joint hose 40 is provided at the lower end portion of the right side wall 41, and a waste liquid tube that opens and closes the waste liquid tube 50. A pinch member 58 is provided. The waste liquid tube 50 is made of an elastic material such as rubber, and has a horizontal portion 50a that extends horizontally forward from the joint hose 40, and extends downward from the horizontal portion 50a. In addition, the waste tube pinch member 58 is formed in a plate shape extending in the vertical direction, and an engaging convex portion 58a that is slidably engaged with the long hole 56b of the slider 56 is provided on the upper end portion, At the lower end portion, a pressing portion 58b is provided below the horizontal portion 50a of the waste liquid tube 50 so as to protrude across the lower portion and have a trapezoidal cross section. Further, on the upper side of the horizontal portion 50a of the waste liquid tube 50, a pressing spring 59 is provided for pinching the waste liquid tube 50 in cooperation with the waste liquid tube pinch member 58 and closing it. The presser spring 59 is constituted by an elongated leaf spring, and is disposed so as to extend along the horizontal portion 50a of the waste liquid tube 50 and to be in contact therewith. Further, both end portions of the holding spring 59 are bent upward and are supported by two support portions 44f and 44f provided on the front and rear (left and right in FIG. 9) of the waste liquid tube pinch member 58 in the side wall main body 44.

  The waste liquid tube pinch member 58 configured as described above moves up and down in conjunction with the up and down movement of the slider 55 accompanying the rotation of the cam disk 55. Specifically, when the slider 56 is lifted from the state shown in FIG. 9, the lower end portion of the long hole 56 b comes into contact with the engaging convex portion 58 a of the waste liquid tube pinch member 58. When the slider 56 is further raised, the waste liquid tube pinch member 58 is raised by being lifted through the engaging convex portion 58a. Thereby, the pressing part 58b of the waste liquid tube pinch member 58 crushes the horizontal part 50a of the waste liquid tube 50 from below, and thereby the waste liquid tube 50 is closed (see FIG. 26B). From this state, when the slider 56 descends, the waste tube pinch member 58 also descends and returns to its original position.

  Further, as shown in FIG. 9B, the cylinder head lock member 57 is formed in a predetermined shape extending in the vertical direction, and is pivotally supported by a support shaft 44b in the side wall body 44 at the center thereof. Yes. At the lower end portion of the cylinder head lock member 57, an engaging convex portion 57a protruding toward the cam disc 55 is provided, and this engaging convex portion 57a is formed in the second cam groove 54 of the cam disc 55. It is slidably engaged. In addition, a hook-shaped lock portion 57 b extending so as to protrude rearward is provided at the upper end portion of the cylinder head lock member 57.

  The cylinder head locking member 57 configured in this manner rotates with the rotation of the cam disk 55, and presses and locks a cylinder head 111 (to be described later) against the upper surface of the cylinder 23 by the lock portion 57b at the upper end. As a result, the upper surface of the cylinder 23 is closed. Specifically, the cam disk 55 shown in FIG. 9B and FIG. 10 rotates in the clockwise direction in both figures, and the engagement convex portion 57a of the cylinder head lock member 57 is located outside the second cam groove 54. By sliding the drive cam portion 65 from the cam portion 64 toward the inner cam portion 66, the cylinder head lock member 57 rotates about the support shaft 44b in the clockwise direction in FIG. 9B. Then, the lock portion 57b of the cylinder head lock member 57 engages with the head guide shaft 114 at the top of the cylinder head 111 and locks it so as to push it down. Thereby, the cylinder head 111 is closed in a state of being in close contact with the upper surface of the cylinder 23 (see FIG. 27B).

  The cylinder opening / closing mechanism 51 configured as described above is built in the left and right side walls 41, 41 as described above, and the gear portions 55a, 55a of the cam disks 55 of both the cylinder opening / closing mechanisms 51, 51 are provided. , Meshed with gears 76, 76 that are rotatably provided at predetermined positions in the corresponding side wall main body 44. As shown in FIG. 8, both gears 76 are fixed to both ends of a power transmission shaft 75 extending horizontally in the left-right direction, and the vertical direction of the rear end in the side wall body 44 to which each gear 76 corresponds. It is arranged at the center of the. A gear 76 (hereinafter referred to as “driven joint gear 76 </ b> A”) provided on the left side wall main body 44 is slightly exposed to the rear, and in a state where the drip unit 21 is attached to the drive unit 22, It meshes with a drive joint gear 134 described later. Accordingly, when the driven joint gear 76A rotates, the left cam disk 55 meshing with the driven joint gear 76A rotates, and the right cam disk 55 rotates in synchronization with the left side via the power transmission shaft 75 and the right gear 76. To do.

  The left and right side walls 41, 41 are provided with drip unit attaching / detaching mechanisms 81, 81 for attaching / detaching the drip unit 21 to / from the drive unit 22. Since these drip unit attaching / detaching mechanisms 81 and 81 are also provided symmetrically in the same manner as the cylinder opening / closing mechanism 51 described above, the following description will focus on what is built in the right side wall 41.

  As shown in FIGS. 8 and 9, the drip unit attaching / detaching mechanism 81 includes a unit lock member 82 that is slidable in the vertical direction at the rear end of the side wall main body 44, and attaches the unit lock member 82 downward. An urging spring 83 and a detaching lever 84 that is operated when the drip unit 21 is detached from the drive unit 22 are provided.

  The unit lock member 82 extends in the vertical direction, and is provided with hook-shaped lock portions 82a and 82a that protrude rearward (rightward in FIG. 9) at the upper and lower ends, respectively. Further, upper and lower end portions of the unit lock member 82 are provided with guide holes 82b and 82b extending in the vertical direction, respectively, and guide convex portions projecting at predetermined positions in the side wall body 44 in the respective guide holes 82b. 44g is slidably engaged. Further, an engagement convex portion 82 c that protrudes toward the cam disk 55 is provided at a substantially central portion in the vertical direction of the unit lock member 82, and this engagement convex portion 82 c is a first portion of the cam disk 55. The cam groove 53 is slidably engaged. Further, at the lower part of the unit lock member 82, there are an upper convex portion 82d and a lower convex portion that protrude to the outer cover 45 side, just above the rear end portion 84b of the removal lever 84 and slightly below the rear end portion 84b, respectively. 82e is provided.

  The detaching lever 84 extends in the front-rear direction, and is supported at the central portion thereof so as to be rotatable on the support shaft 44d. The front end portion 84a of the removal lever 84 faces the outside of the side wall 41, and is located inside a recess 41a provided at the front portion of the side wall 41 and opened forward. Further, the rear end portion 84b of the removal lever 84 is formed in an L shape on the side surface, and is in contact with the upper convex portion 82d of the unit lock member 82 from below.

  When the drip unit 21 is attached to the drive unit 22 by the drip unit attaching / detaching mechanism 81 configured as described above, the upper and lower lock portions 82a and 82a of the unit lock member 82 correspond to the drive units 22 respectively corresponding thereto. It is locked in an engagement hole 108d (see FIGS. 4 and 16A), which will be described later. Thereby, the drip unit 21 is securely attached in a state where it is locked to the drive unit 22. When removing the drip unit 21 from the drive unit 22, the front end portions 84a, 84a of the left and right removal levers 84, 84 are simultaneously pushed down from the state shown in FIG. As a result, as shown in FIG. 5B, the unit lock member 82 is pushed up against the urging force of the spring 83 by the removal lever 84 via the upper convex portion 82d. The locking portion 82a is released from the engagement hole 108d. In this state, the drip unit 21 is removed from the drive unit 22 by pulling the drip unit 21 forward.

  9B, when the cam disk 55 is positioned at the standby position, the engagement convex portion 82c of the unit lock member 82 is located at the distal end portion of the outer cam portion 61 of the first cam groove 53. positioned. Therefore, as described above, when the removal lever 84 is operated, the engagement convex portion 82c is allowed to move upward by the concave portion 61a at the distal end portion of the outer cam portion 61, thereby the removal lever 84. Can be operated. On the other hand, when the cam disk 55 is not positioned at the standby position, for example, when the cam disk 55 is rotating, the engaging convex portion 82c of the unit lock member 82 has the first cam groove 53. Therefore, the upward movement is restricted (see, for example, FIG. 26B). As a result, the unit lock member 82 cannot be moved upward, and the removal lever 84 cannot be operated. Accordingly, the drip unit 21 can be detached from the drive unit 22 only when the cam disk 55 is located at the standby position. When the cam disk 55 is rotating, the drip unit 21 is erroneously removed. It can be prevented from being removed.

  Although not shown, a cam lock mechanism is provided on the back side of the drip unit 21 so that the cam disk 55 cannot rotate when the drip unit 21 is removed from the drive unit 22. Specifically, it is configured by a lock member that can freely advance and retreat with respect to the driven joint gear 76A meshing with the left cam disk 55, and a spring that urges the lock member toward the driven joint gear 76A. When the drip unit 21 is removed from the drive unit 22, the lock member moves to the driven joint gear 76A side and engages with this to make the gear 76A non-rotatable. As a result, the cam disk 55 meshing with the driven joint gear 76A also cannot be rotated. On the other hand, when the drip unit 21 is attached to the drive unit 22, the unlocking member provided on the drive unit 22 side engages with the lock member on the drip unit 21 side, and this is opposite to the driven joint gear 76A. By moving, the lock of the driven joint gear 76A by the lock member is released. As a result, the driven joint gear 76A can rotate, and the cam disk 55 can also rotate.

  As described above, in the state where the drip unit 21 is detached from the drive unit 22, the cam disk 55 is locked so as not to rotate for the following reason. That is, the control of the rotation angle of the cam disk 55 is performed using a mode switch 136 provided on the drive unit 22 side and having a switch gear 136a that rotates in synchronization with the cam disk 55, as will be described later. . Therefore, it is necessary to maintain the consistency of the rotation angle between the switch gear 136a and the cam disk 55.

  Note that upper and lower guide protrusions 44h and 44h projecting rearward are provided on the rear surfaces of the left and right side wall main bodies 44 and 44, respectively. When the drip unit 21 is attached to the drive unit 22, these guide convex portions 44h are inserted into guide holes 108e described later on the drive unit 22 side, and the lock portion 82a of the unit lock member 82 is engaged with the engagement hole 108d. The drip unit 21 can be easily attached to the drive unit 22 by being inserted into the drive unit 22.

  Next, the cylinder catcher 34 that holds the cylinder 23 accommodated in the cylinder holder 24 will be described. As shown in FIG. 7A and FIG. 13A cut along the line BB in FIG. 7B, the cylinder catcher 34 includes a U-shaped support member 91 having a planar shape opened forward, and the support member. It is composed of two gripping members 92 and 92 fixed to the left and right front end portions of 91, respectively. The support member 91 is made of a leaf spring, and has a base portion 91a extending a predetermined length in the left-right direction and two left and right arm portions 91b, 91b extending at a right angle at the left and right ends of the base portion 91a and extending a predetermined length forward. It consists of The base 91a is screwed to the inner side surface of the back wall 42. And the said holding members 92 and 92 are being fixed to the front-end part of both arm parts 91b and 91b. Both the gripping members 92 and 92 are opposed to each other, and their facing surfaces are formed in a convex shape.

  With the cylinder catcher 34 configured in this manner, the cylinder 23 accommodated in the cylinder accommodating portion 24a of the cylinder holder 24 is firmly clamped from the left and right by the left and right gripping members 92, 92 by the spring force of the support member 91. .

  Further, as shown in FIGS. 7 and 8, a driven gear unit 85 is attached to the bottom wall 43 of the cylinder holder 24. The driven gear unit 85, together with a drive gear unit 161 (to be described later) on the drive unit 22 side, constitutes a paper drawing mechanism 160 for pulling out the paper P from the paper unit 20, and is attached to the bottom wall 43 of the cylinder holder 24. The driven gear holder 86, a rotating shaft 87 extending in the left-right direction and rotatably supported on the left and right side walls of the driven gear holder 86, and a predetermined interval in the length direction of the rotating shaft 87. Two driven gears 88 and 88 fixed to 87 are provided. Both driven gears 88, 88 are constituted by spur gears having the same shape and size, and are exposed to the outside from the rear to the lower side of the driven gear holder 86. On the inner side surface of each driven gear 88, three projecting portions 88 a are arranged on the same circumference around the rotation shaft 87 and are disposed at an equal angle and project a predetermined length.

  As shown in FIGS. 7 and 14, a gear lock member 93 that is slidable in the vertical direction is provided in the vicinity of the left driven gear 88 inside the driven gear holder 86. This gear lock member 93 constitutes a gear lock mechanism 94 (lock mechanism) for locking the paper drawer mechanism 160 in an inoperable state together with a paper break detection plate 202 described later on the paper unit 20 side. The gear lock member 93 includes a guide portion 95 having a vertically long guide hole 95a and a lock portion 96 extending rearward (rightward in FIG. 14) from the upper end portion of the guide portion 95, and the side shape is formed in an L shape. ing. A guide pin 86a provided on the inner surface of the driven gear holder 86 is loosely inserted into the guide hole 95a of the guide portion 95. The lower end portion of the guide portion 95 protrudes to the right, and the paper breakage detection plate 202 is inserted. An engaging convex portion 95b that abuts from above is provided. On the other hand, a locking projection 96a protruding downward is provided at a position near the rear end of the lock 96. A spring 89 that biases the gear lock member 93 downward is provided inside the driven gear holder 86.

  Next, the paper unit 20 will be described. As shown in FIGS. 4 and 14, the paper unit 20 includes a continuous belt-like paper filter P having a width longer than the outer diameter of the cylinder 23, a paper holder 201 that holds the paper filter P so that it can be drawn, The paper holder 201 is rotatably connected to the back wall, and includes a paper breakage detection plate 202 (movable member) for detecting paper breakage. The paper filter P is produced by finely weaving plant fibers and the like, and has a roll portion Pr wound in a roll shape, as in the general case for coffee extraction.

  As shown in FIG. 14, the paper holder 201 is formed in a box shape that opens from the front surface to the lower surface, and is rotatably supported while the roll portion Pr of the paper filter P is accommodated therein. Yes. Although not described in detail, the paper holder 201 is configured such that the roll part Pr of the paper filter P can be easily attached and detached through the opening part.

  Further, on the upper part of the paper holder 201, a hook-shaped first mounting portion 203 protruding upward and a hook-shaped second mounting portion 204 protruding rearward are provided. These first and second attachment portions 203 and 204 are detachably attached to the bottom wall 43 of the cylinder holder 24 from below and from the front. Furthermore, at the front end of the paper holder 201, two rotatable guide rollers 205, 205 are provided that are spaced apart in the vertical direction and extend in the horizontal direction. The paper filter P guided by these guide rollers 205 and 205 passes between the cylinder 23 and the filter block 32 from the front of the drip unit 21, passes through both driven gears 88 and 88 of the driven gear unit 85, and will be described later. It is engaged with both drive gears 166 and 166 of the drive gear unit 161 and is set so as to be recovered in the lower bucket B (see FIG. 1).

  As shown in FIG. 14, the paper breakage detection plate 202 is disposed so as to pass through a slit 201a formed in the back wall of the paper holder 201, has a predetermined cam contour, and has a paper holder 201 at the lower end. And a contact portion 207 that extends a predetermined length from the top of the front end of the cam portion 206 and contacts the outer peripheral surface of the roll portion Pr of the paper filter P. In the cam contour of the cam portion 206, a recess 206a is formed at a predetermined position away from the contact portion 207. The engaging projection 95b of the gear lock member 93 is in contact with the cam portion 206 of the paper breakage detection plate 202 configured as described above from above.

  In the paper unit 20 configured as described above, each time coffee is extracted, the paper filter P is pulled out from the paper holder 201 by a predetermined length, whereby the diameter of the roll portion Pr is gradually reduced. In this case, the paper breakage detection plate 202 rotates while following the roll part Pr whose diameter is reduced. Specifically, the paper breakage detection plate 202 rotates counterclockwise in FIG. 14 with the lower end portion as a fulcrum while the contact portion 207 is in contact with the roll portion Pr. When the paper filter P almost disappears and the roll portion Pr reaches a predetermined diameter, the engagement convex portion 95b of the gear lock member 93 that is in contact with the cam portion 206 of the paper breakage detection plate 202 becomes a concave portion 206a of the cam contour. To reach. Accordingly, as shown in FIG. 15, the gear lock member 93 slides to the lower lock position, and the lock portion 96 a engages the driven gear 88 via the protruding portion 88 a of the driven gear 88. As a result, the paper drawer mechanism 160 is locked in an inoperable state.

  Next, the drive unit 22 will be described with reference to FIGS. The drive unit 22 includes a case 101 that constitutes an outer shell thereof, and a cylinder head cover 100 that is provided on the front upper portion of the case 101 so as to protrude forward. The case 101 is formed in a box shape by assembling a plurality of metal plates having a predetermined shape and screwing them together.

  As shown in FIG. 16 (a), the front wall 108 constituting the front surface of the case 101 has a large open opening 108a formed in the lower half thereof, and most of the opening 108a is closed. A front wall cover 109 is provided. In addition, two engaging holes 108d and two guiding holes 108e are provided symmetrically at predetermined positions on the left and right ends of the front wall 108. As described above, the lock portion 82a on the drip unit 21 side is engaged with the engagement hole 108d, and the guide protrusion 44h on the drip unit 21 side is inserted into the guide hole 108e.

  The cylinder head cover 100 is provided with a pair of left and right cylinder head supports 103 and 103 provided at the left and right ends of the upper front portion of the case 101 so as to protrude forward, and spaced apart from each other in the left and right direction. The cover body 102 is freely attached and the like. As shown in FIG. 21, each cylinder head support 103 is formed in an inverted U shape on the front surface, and is engaged with an engaging claw 102 b (described later) of the cover main body 102 at a predetermined position on the upper surface and the outer surface. Joint holes 103a and 103b are respectively formed. In addition, a guide hole 103c that extends in the front-rear direction and allows a head guide shaft 114 of a cylinder head 111 described later to move in the front-rear direction is formed on the inner side surface of each cylinder head support 103. Further, an opening 103d is formed on the upper surface of each cylinder head support 103 from the front end of the guide hole 103c. The opening 103 d has a width in the front-rear direction that is larger than the diameter of the guide shaft 114.

  The cover main body 102 is formed in a substantially rectangular shape in plan view, and a raw material chute 104 and a steam venting duct 106 that penetrate vertically and project upward are integrally formed with the cover main body 102 at predetermined positions on the upper surface. Is provided. In addition, a hot water supply nozzle 105 is detachably attached to the cover main body 102 in an attachment hole 102a penetrating in the vertical direction. A chute 12a (see FIG. 1) of the mill 12 is connected to the raw material chute 104, a hose (not shown) for steam removal is connected to the steam vent duct 106, and a hot water supply nozzle 105 is connected to the steam chute 105. The hot water supply tube 13a (see FIG. 1) is connected.

  The left and right end portions of the cover body 102 are provided with two left and right engaging claws 102b and 102b that protrude slightly downward and are formed in a hook shape. In the cover body 102 configured in this manner, each locking claw 102b is inserted into the engagement hole 103a on the upper surface of the corresponding cylinder head support 103, and is snap-fitted into the engagement hole 103b on the outer surface from the inside. By being engaged, the cylinder head supports 103 and 103 are firmly attached.

  On the other hand, when removing the cover main body 102 from the cylinder head supports 103, 103, the left and right engaging claws 102b, 102b are pushed by pushing the operation portion 102c slightly extending upward from the left engaging claws 102b to the left. Are sequentially removed from the locking holes 103b of the cylinder head support 103, whereby the cover body 102 can be easily removed. As described above, the cover main body 102 can be easily removed without using a tool or the like, so that the cover main body 102 itself can be washed, and the inside of the cylinder head cover 100 can be easily accessed from above. The maintainability and cleanability can be improved.

  A cylinder head 111 that opens and closes the upper surface of the cylinder 23 is slidably provided in the front-rear direction inside the cylinder head cover 100 configured as described above.

  FIG. 22 shows the cylinder head 111 and its surroundings. As shown in FIG. 5A, the cylinder head 111 is formed in a circular shape whose planar shape is larger than the upper surface of the cylinder 23. A circular packing 112 having a flat bottom surface is provided on the entire bottom surface of the cylinder head 111, and an air supply port 112a (see FIG. 23B) is provided in the packing 112. The upper part of the cylinder head 111 is formed in a truncated cone shape, and air is supplied to the upper end of the cylinder head 111 from outside through the air supply port 112a of the packing 112 from outside. A rubber air supply pipe 113 is connected for this purpose. Further, a head guide shaft 114 that is longer than the outer diameter of the cylinder head 111 and extends in the left-right direction (vertical direction in FIG. 22A) is provided at the upper end of the cylinder head 111.

  Further, a slider 116 slidable in the front-rear direction is connected to the cylinder head 111 via a connecting member 115. The connecting member 115 is formed in a substantially U-shape with a planar shape opened to the front, and the left and right front end portions are rotatably connected to the cylinder head 111 via the connecting shaft 115a directly below the head guide shaft 114, respectively. Has been. The slider 116 extends in the front-rear direction, and a front end portion thereof is rotatably connected to a rear end portion of the connecting member 115 via a connecting shaft 116a. A long hole 116b extending in the left-right direction is formed at the rear end of the slider 116, and a paper drawer / cylinder head driving mechanism 123, which will be described later, is engaged with the long hole 116b. The cylinder head 111 and the slider 116 slide in the front-rear direction while being guided by the head guide member 117 having a predetermined shape.

  The head guide member 117 is fixed between the left and right cylinder head supports 103, 103 described above. As shown in FIG. 22, the head guide member 117 includes a slider support portion 117a that slidably supports the slider 116, and extends forward from the slider support portion 117a through the left and right sides of the cylinder head 111. It has two left and right shaft support portions 117b and 117b that support the head guide shaft 114 in a state where it is placed.

  An auxiliary material chute 118 is detachably attached to the front portion of the cylinder head 111. The auxiliary material chute 118 is located between the material chute 104 of the cover main body 102 and the cylinder 23 when the cylinder head 111 is located at the standby position, and the material guided by the material chute 104 is further transferred to the cylinder 23. It is a guide. The auxiliary raw material chute 118 penetrates in the vertical direction and is formed in a cylindrical shape whose upper surface is slightly larger than the bottom surface of the raw material chute 104 of the cover body 102. A mounting arm 119 extending rearward is integrally provided on the back surface of the auxiliary material chute 118. The mounting arm 119 has a pair of left and right locking claws 119a and 119a extending in the vertical direction and having a lower end formed in a bowl shape, and the both locking claws 119a and 119a are connected to each other in the vertical center. Has been. The auxiliary raw material chute 118 configured as described above is configured such that the lower end portions of the two locking claws 119a and 119a sandwich the chute mounting portion 111a at the front upper surface of the cylinder head 111 from the left and right by snap fitting, thereby It can be securely attached to.

  On the other hand, when the auxiliary material chute 118 is removed from the cylinder head 111, it can be easily removed by picking the upper ends of the locking claws 119a and 119a and widening the lower ends. Thus, the auxiliary material chute 118 can be easily removed without using a tool or the like, so that the auxiliary material chute 118 itself can be washed.

  Further, as shown in FIG. 22C, the cylinder head 111 rotates forward (for example, 45 degrees) about the connecting shaft 116a, and the lower surface of the cylinder head 111, that is, the packing 112 may be directed forward. Is possible. In this case, the head guide shaft 114 is drawn upward from the guide holes 103c of the left and right cylinder head supports 103, 103 via the opening 103d at the front upper portion thereof, whereby the lower surface of the cylinder head 111 is moved forward. Directed. Thus, since the cylinder head 111 is configured such that its lower surface is directed forward, the maintenance performance and cleaning performance of the cylinder head 111 can be improved.

  Next, the structure in the case 101 of the drive unit 22 will be described. As shown in FIGS. 16 to 20, the case 101 includes a cam drive mechanism 121 that drives the cam disk 55 of the drip unit 21, a pinch drive mechanism 122 that drives a plurality of pinches 8 to be described later, and paper P A paper drawer / cylinder head driving mechanism 123 that drives the cylinder head 111 and an air pump 124 that supplies air to the cylinder 23 are incorporated.

  The cam drive mechanism 121 includes a first motor 131 formed of a DC motor, a gear box 132 that is connected to the first motor 131, has an output shaft 132a that extends in the left-right direction, and has both ends projecting to the outside. An output gear 133 fixed to the left end of the shaft 132a and a drive joint gear 134 that meshes with the output gear 133 and meshes with the driven joint gear 76A on the drip unit 21 side are provided. The gear box 132 and the drive joint gear 134 are appropriately attached to a support plate (not shown) having a predetermined shape.

  A mode switch 136 for controlling the rotation angle of the cam disk 55 is provided near the output gear 133. The mode switch 136 has a switch gear 136 a that meshes with the output gear 133 via the intermediate gear 137 and rotates at an equal angle in synchronization with the cam disk 55. The mode switch 136 has a plurality of modes in which the switch gear 136a is turned on at a plurality of predetermined rotation angles, and the control device 7 identifies the rotation angle of the cam disk 55 according to those modes. To do.

  The pinch drive mechanism 122 drives the pinch 8 for opening and closing a plurality of predetermined portions of the transport tube 9 for transporting coffee and air during coffee extraction. Here, first, with reference to FIG. 1, the arrangement | positioning relationship and structure of the conveyance tube 9 and the pinch 8 are demonstrated easily. As shown in the figure, the transfer tube 9 includes a first air transfer tube 9A connected between the air pump 124 and the cylinder head 111, and a first hose 120 connected between the air pump 124 and the joint hose 120 on the drive unit 22 side. It is comprised by 2 air conveyance tube 9B and the drink conveyance tube 9C connected to the joint hose 120. FIG. These transfer tubes 9A to 9C are all made of an elastic material such as rubber. The first air transfer tube 9A is connected to the rear end of the air supply pipe 113. The joint hose 120 is provided at the lower right end on the front side of the drive unit 22, and is connected to the joint hose 40 on the drip unit 21 side when the drip unit 21 is attached to the drive unit 22.

  Moreover, the pinch 8 is comprised by the three pinches 8 each attached in the middle of the said conveyance tubes 9A-9C, specifically, the 1st air pinch 8A, the 2nd air pinch 8B, and the drink pinch 8C. These pinches 8A to 8C are the same. As shown in FIGS. 16 (b) and 17 (b), each pinch 8 is rotatably attached to the tube holder 141 that holds the portion of the transport tube 9 to which the pinch 8 is attached, and the tube holder 141. In cooperation with this, a pinch main body 142 for crushing and closing the transport tube 9 and a pinch main body 142 that is rotatably provided on the opposite side of the transport tube 9 and pressing the pinch main body 142 toward the transport tube 9 side are provided. And a cam 143 having a predetermined shape.

  In the pinches 8A to 8C configured as described above, the first and second air pinches 8A and 8B are arranged adjacent to each other as shown in FIG. 16B, and the beverage pinch 8C is formed as shown in FIG. ), The second air pinch 8B is disposed behind the second air pinch 8B so as to oppose it. In these pinches 8A to 8C, the cam 143 is shared.

  As shown in FIGS. 16 and 19, the pinch drive mechanism 122 includes a first motor 131 and a gear box 132 that are common to the cam drive mechanism 121 described above, and an output gear 145 fixed to the right end of the output shaft 132a. , A drive gear 147 fixed to the rotating shaft 146 of the cam 143 of the pinch 8, and an intermediate gear 148 having two gear portions respectively engaged with the output gear 145 and the drive gear 147.

  As described above, the cam drive mechanism 121 and the pinch drive mechanism 122 use the first motor 131 as a common drive source, and the cam disk 55, the filter block 32, the cylinder head lock member 57, and the waste tube pinch member 58 by the former 121. And the three pinches 8A to 8C by the latter 122 are driven so as to be linked to each other. Thereby, when coffee is extracted, the upper and lower surfaces of the cylinder 23 are opened and closed, the waste tube 50 is opened and closed by the waste tube pinch member 58, and the transport tubes 9A to 9C are opened and closed by the pinches 8A to 8C. It can be carried out.

  FIG. 23 shows the paper drawer / cylinder head drive mechanism 123 and its surroundings. As shown in the figure, the paper drawer / cylinder head drive mechanism 123 is connected to a second motor 151 (drive source, motor) composed of a DC motor and the second motor 151, and extends in the vertical direction and has both ends. A gear box 152 having an output shaft 152a projecting to the outside, a cylinder head driving unit 153 and a paper drawer driving unit 154 provided at the upper and lower ends of the output shaft 152a, respectively.

  As shown in FIGS. 23 and 24, the cylinder head drive unit 153 has a one-way clutch that is formed in a circular shape in plan view and can rotate only in a predetermined direction as the output shaft 152a rotates. . An engagement protrusion 153 a that protrudes upward is provided on the peripheral edge of the upper surface of the cylinder head drive unit 153, and this engagement protrusion 153 a slides into the long hole 116 b of the slider 116 connected to the cylinder head 111. It engages freely. Therefore, when the cylinder head drive unit 153 rotates 180 degrees from the standby position shown in FIG. 24A, the slider 116 slides forward (downward in the figure) as shown in FIG. Thereby, the cylinder head 111 moves to the front cylinder closed position.

  Two micro switches 155 and 155 for detecting the position of the cylinder head 111 by detecting the rotational position of the cylinder head drive unit 153 are arranged on the left and right sides of the cylinder head drive unit 153. In each micro switch 155, the tip of the switch lever 155a is always in contact with the side surface of the cylinder head drive unit 153, and the tip of the switch lever 155a engages with a recess 153b provided at a predetermined position on the side surface. As a result, the ON / OFF state of the microswitch 155 is switched.

  On the other hand, as shown in FIG. 23, the paper drawer drive unit 154 is constituted by a bevel gear that incorporates a one-way clutch that can rotate only in the opposite direction to the cylinder head drive unit 153. The drive gear unit 161 of the paper drawer mechanism 160 is driven by the rotation of the paper drawer drive unit 154. Although illustration is omitted, a micro switch for detecting the rotational position of the paper drawer drive unit 154 is provided in the vicinity of the paper drawer drive unit 154, similarly to the cylinder head drive unit 153 described above.

  The drive gear unit 161 has a frame 162 having a predetermined shape, and an upper shaft 163 and a lower shaft 164 are rotatably supported by upper and lower ends of the frame 162, respectively. An intermediate gear 165 composed of a bevel gear that meshes with the paper drawer driving unit 154 is fixed to the upper shaft 163 at substantially the center in the length direction. On the other hand, the left and right drive gears 166 and 166 are fixed to the lower shaft 164 at the end in the length direction and outside the frame 162. The two drive gears 166 and 166 are arranged at the same interval as the two driven gears 88 and 88 of the driven gear unit 85, and the corresponding driven gear is in a state where the drip unit 21 is attached to the drive unit 22. 88 and 88 are configured to mesh with each other.

  Further, as shown in FIG. 16 and the like, a toothed pulley 167 is fixed to the left end portion of the upper shaft 163 on the outside of the frame 162, while the left drive gear 166 is fixed to the left end portion of the lower shaft 164. A pulley 168 having the same shape and size as the pulley 167 is fixed to the outside. A timing belt 169 is wound around these pulleys 167 and 168.

  FIG. 25 shows the operation of the paper drawer mechanism 160 driven by the paper drawer / cylinder head driving mechanism 123. As shown in FIG. 5A, when the output shaft 152a of the paper drawer / cylinder head drive mechanism 123 rotates in a predetermined direction (counterclockwise direction indicated by an arrow), the paper drawer drive unit 154 is connected via a built-in one-way clutch. And connected to the output shaft 152a and rotate integrally with the output shaft 152a in the same direction. Then, the rotational force of the paper drawer drive unit 154 is transmitted to the drive gear 166 via the intermediate gear 165 of the drive gear unit 161, the pulleys 167 and 168, and the timing belt 169. As a result, as indicated by arrows in FIG. 25A, the paper filter P that is engaged with both gears 166 and 88 is pulled out from the paper holder 201 while the drive gear 166 and the driven gear 88 rotate. In this way, by pulling out the paper filter P, the paper filter P can be pulled out smoothly and reliably compared to, for example, pulling out the paper filter P with a simple roller and rotating the roller. .

  On the other hand, as shown in FIG. 25 (b), when the output shaft 152a of the paper drawer / cylinder head driving mechanism 123 rotates in the direction opposite to the predetermined direction (clockwise indicated by the arrow), the output shaft 152 and the paper The drawer drive unit 154 is not connected by a one-way clutch. As a result, the drive gear 166 does not rotate, and therefore the paper filter P is not pulled out. When the output shaft 152 rotates in the above direction, as described above, the cylinder head 111 slides back and forth between the standby position and the cylinder closed position.

  In the state where the output shaft 152a is stopped, the paper drawer drive unit 154 can idle in the direction indicated by the arrow in FIG. 25A due to the characteristics of the built-in one-way clutch. In the opposite direction of the arrow, it is locked so as not to rotate. Therefore, when the output shaft 152a is stopped, the intermediate gear 165, the drive gear 166, and the driven gear 88 can rotate only in the directions indicated by the arrows in FIG.

  Therefore, for example, when the paper filter P is set, the paper filter P can be forcibly pulled out in the direction indicated by the arrow in FIG. 25A, and thereby the paper filter P hanging from the coffee extraction device 2. The length etc. can be adjusted easily. Further, since the drive gear 166 and the driven gear 88 do not rotate in the directions opposite to the respective arrows in the figure, the paper filter P is fed only in the pull-out direction indicated by the arrows in the figure. The used part of the paper filter P that has moved from the unit 21 to the outside can be reliably prevented from returning to the drip unit 21 side.

  Next, the air pump 124 will be described. As shown in FIGS. 16 to 19, the air pump 124 includes a motor 124a, a pump main body 124b driven by the motor 124a, an intake filter 124c for removing dust, dust, and the like from the outside air. The pump body 124b is connected to the intake filter 124c via the intake tube 125A, and is connected to the first and second air transfer tubes 9A and 9B via the exhaust tube 125B. Therefore, when the pump body 124b is driven by the motor 124a, external air is sucked into the pump body 124b from the intake filter 124c via the intake tube 125A, and the sucked air is discharged via the exhaust tube 125B. The first and second air transfer tubes 9A and 9B are pumped.

  Next, the operation of the coffee brewing apparatus 2 configured as described above will be described with reference to FIGS. 26 to 28 showing a series of operations in order. In these figures, the rotation of the cam disk 55 is mainly shown in the upper stage, and the operations of the filter block 32 and the cylinder head 111 are mainly shown in the lower stage.

  FIG. 26A shows a standby state. In this standby state, the cam disk 55, the filter block 32, and the cylinder head 111 are positioned at the respective standby positions, and the upper and lower surfaces of the cylinder 23 are all open. In this standby position, the auxiliary material chute 118 is positioned directly below the material chute 104 of the cover main body 102. Further, in the standby state, as shown in (1) of FIG. 29, the first air pinch 8A, the second air pinch 8B, and the beverage pinch 8C are all in an open state, and accordingly, the transport tubes corresponding to the pinches 8A to 8C, respectively. 9A to 9C are all open.

  From this standby state, the first motor 131 of the cam drive mechanism 121 rotates in a predetermined direction, whereby the cam disk 55 rotates in the clockwise direction in FIG. As a result, the slider 56 engaged with the first cam groove 53 of the cam disk 55 is raised, and the filter block 32 supported by the slider 56 is raised together with the paper filter P on the upper side. In this case, the lower edge portion of the long hole 56 b of the slider 56 abuts on the engaging convex portion 58 a of the waste liquid tube pinch member 58 during the ascent of the slider 56, and then, as the slider 56 rises, the waste liquid tube pinch The member 58 is also raised. Then, as shown in FIG. 4B, the cam disk 55 rotates about 120 degrees from the standby position, so that the filter block 32 presses the paper filter P against the lower surface of the cylinder 23 and the cylinder 23 Seal the bottom surface. In this case, the waste liquid tube pinch member 58 closes the waste liquid tube 50 by crushing the waste liquid tube 50 between the pressing portion 58 b and the pressing spring 59.

  Next, in this state, a predetermined amount of raw material and hot water are supplied into the cylinder 23 from the raw material supply device 3 and the hot water supply device 4, respectively. Specifically, the raw material is supplied to the cylinder 23 via the raw material chute 104 of the cover main body 102 and the auxiliary raw material chute 118 of the cylinder head 111. On the other hand, hot water is supplied to the cylinder 23 via the hot water supply nozzle 105 of the cover body 102. At the time of supplying the raw material and hot water, as shown in (2) of FIG. 29, the pinches 8A to 8C are all in an open state as in the standby state.

  After the supply of the raw material and hot water, the cam disk 55 stops with the stop of the first motor 131 when it rotates about 180 degrees from the standby position, as shown in FIG. In this state, as shown in (3) of FIG. 29, only the second air pinch 8B is in an open state, and the other pinches 8A and 8C are all in a closed state. Thereafter, the second motor 151 of the paper drawer / cylinder head driving mechanism 123 rotates in a predetermined direction, and the cylinder head driving unit 153 rotates 180 degrees from the standby position (see FIG. 24A) (FIG. 24). (See (b)), the second motor 151 stops. As a result, the cylinder head 111 moves forward from the standby position and reaches directly above the cylinder 23. In this case, the cylinder head 111 is slightly lowered as shown in FIG. 27A by moving the head guide shaft 114 at the upper part thereof to the front side of the front end of the shaft support portion 117b of the head guide member 117. , Placed on the cylinder 23. In this state, when the air pump 124 operates for a predetermined time (for example, several seconds), air is sent to the filter block 32 via the second air transfer tube 9B and the filter block tube 32a. This air passes through the mesh filter 72 and the paper filter P of the filter block 32 and stirs the raw material and hot water in the cylinder 23. The steam generated in the cylinder 23 is appropriately discharged to the outside through the steam vent duct 106.

  After the completion of the agitation, the first motor 131 of the cam drive mechanism 121 rotates again, whereby the cam disk 55 further rotates. As shown in FIG. 27B, when the cam disk 55 rotates about 240 degrees from the standby position, the cylinder head lock member 57 that engages with the second cam groove 54 of the cam disk 55 becomes the same. In the drawing, the head guide shaft 114 is slightly rotated clockwise, and the head guide shaft 114 is pushed downward by the lock portion 57b. Accordingly, the cylinder head 111 seals the cylinder head 111 while being in contact with the upper surface of the cylinder 23. In this state, as shown in FIG. 29 (4), the first air pinch 8A and the beverage pinch 8C are in an open state, while the second air pinch 8B is in a closed state.

  Next, the air pump 124 operates for a predetermined time (for example, several seconds), and the air is pumped to the cylinder head 111 via the first air transfer tube 9 </ b> A and further supplied to the cylinder 23. Thereby, the inside of the cylinder 23 is pressurized, and the extracted coffee is filtered by the paper filter P and supplied to the cup C through the filter block tube 32a, the beverage transport tube 9C, the mixing bowl 5 and the beverage tube 5a. The

  As described above, after the coffee is supplied to the cup C, the first motor 131 of the cam drive mechanism 121 rotates in the opposite direction, so that the cam disk 55 also rotates in the opposite direction, and the original standby Return to position. In this case, as shown in FIG. 27 (c), the head guide shaft 114 is unlocked by the cylinder head locking member 57 in the middle, and the head guide shaft 114 is moved by the convex portion 55 b of the cam disc 55. Pushed up. Then, the second motor 151 of the paper drawer / cylinder head driving mechanism 123 rotates in the same direction as described above, and the cylinder head driving unit 153 further rotates 180 degrees. Thus, as shown in FIG. 28A, the cylinder head 111 and the block filter 32 return to the standby position. In this case, on the paper filter P on the filter block 32, the extracted straw G that is the raw material after coffee extraction remains.

  In this case, the waste liquid tube pinch member 58 also returns to the original standby position, and the waste liquid tube 50 is opened. Thereby, even when a small amount of coffee remains in the filter block tube 32a or the beverage transport tube 9C, the coffee is discharged into the coffee bucket B through the waste liquid tube 50. In particular, since the beverage transport tube 9C connected to the joint hose 120 on the drive unit 22 side is piped so as to extend upward from the joint hose 120, the coffee remaining in the portion easily flows to the joint hose 120 side. Further, it flows to the waste liquid tube 50 side and is discharged. As a result, after the coffee is transported from the cylinder 23, the coffee does not remain in the transport path, so that the coffee extracted at the previous time is not mixed in the next coffee extraction, and high-quality coffee is provided. can do.

  Next, the second motor 151 of the paper drawer / cylinder head drive mechanism 123 rotates in the opposite direction to the above, so that the paper drawer drive unit 154 moves in a predetermined direction (see FIG. 25A) a predetermined number of times (for example, twice). ),Rotate. Thereby, the drive gear 166 and the driven gear 88 of the paper drawer mechanism 160 rotate in the direction in which the paper filter P is pulled out from the paper holder 201, and pulls out the paper filter P by a predetermined length. Specifically, as shown in FIG. 28 (b), the paper filter P is pulled out from the back side of the filter block 32 by the length of the used part used for the coffee filtration, and as a result, The unused part following the finished part is set on the filter block 32.

  Thus, a series of operations for coffee extraction by the coffee extraction device 2 is completed.

  Next, a method for determining whether the paper filter P is out of paper will be described. As described above, when coffee extraction is repeated and the paper filter P is pulled out from the paper holder 201, the diameter of the roll part Pr of the paper filter P gradually decreases. As described with reference to FIG. 15, when the driven gear 88 is locked so as not to rotate by the gear lock mechanism 94, the paper drawer mechanism 160 is locked in an inoperable state. In this case, when a predetermined voltage is applied to the second motor 151 of the paper drawer / cylinder head driving mechanism 123, the second motor 151 tries to rotate, but the paper drawer mechanism 160 is locked as described above. Therefore, the second motor 151 is also locked in a non-rotatable state.

  As described above, since the second motor 151 is a DC motor, when the rotational speed is 0 by being locked, the torque is maximized and the current value is also maximized due to the characteristics of the motor. Therefore, the control device 7 detects the current value of the second motor 151 and determines whether or not the second motor 151 is locked based on the current value. Specifically, when the detected current value exceeds a relatively high predetermined value, it is determined that the second motor 151 is locked. Then, based on the determination result, it is determined that the paper drawer mechanism 160 is locked, that is, it is out of paper.

  As described above, since it is possible to determine whether the paper has run out based on the operating state of the second motor 151, conventionally, such as a sensor or a switch for detecting the diameter of the roll part Pr of the paper filter P has been generally used. Paper breakage can be appropriately determined without using an electrical component used for the determination. When it is determined that the paper has run out, the vending machine 1 performs processing such as stopping the sale of coffee and displaying that fact.

  As described above in detail, according to this embodiment, since the drip unit 21 is detachably attached to the drive unit 22, the drip unit 21 can be removed by removing the drip unit 21 from the drive unit 22 during maintenance. It can be easily cleaned, and therefore good maintainability can be obtained. Moreover, since the coffee extracted in the cylinder 23 is filtered using the paper filter P, high quality coffee with very little residue can be obtained. Furthermore, the paper pulling mechanism 160 that pulls out the paper filter P from the paper holder 201 is driven by the second motor 151 that is a common driving source with the cylinder head 111 for extracting coffee, so that only the paper pulling mechanism 160 is driven. Compared to the case where a dedicated motor is used, the coffee extraction device 2 itself can be manufactured at a low cost.

  Further, during maintenance, the drip unit 21 is removed from the drive unit 22, and the paper filter P is wetted by washing the drip unit 21 with the paper unit 20 removed from the drip unit 21 together with the paper filter P. The drip unit 21 can be easily cleaned. Furthermore, since the drive gear 166 of the paper drawer mechanism 160 is provided on the drive unit 22 side, and the driven gear 88 is provided on the drip unit 21 side, the drive gear 166 is removed by removing the drip unit 21 from the drive unit 22. And the driven gear 88 can be disengaged. As a result, the engagement of the paper filter P by the two gears 166 and 88 can be easily disengaged. Further, the paper filter P can be sandwiched between the two gears 166 and 88 only by attaching the drip unit 21 to the driving unit 22 with the end portion of the paper filter P positioned between the driving gear 166 and the driven gear 88. As a result, the paper filter P can be easily set in the paper drawer mechanism 160.

  In addition, this invention can be implemented in various aspects, without being limited to the said embodiment described. For example, in the embodiment, the case where the present invention is applied to a coffee extraction device has been described, but the present invention can also be applied to a beverage extraction device that extracts tea-based beverages using tea leaves as a raw material.

  In the embodiment, when the paper filter P is out of paper, the gear lock member 93 of the gear lock mechanism 94 is configured to lock the driven gear 88 of the paper drawer mechanism 160. The paper drawer mechanism 160 may be locked by locking the driven gear 88 directly at 202. Furthermore, in the embodiment, at the time of extraction, the air by the air pump 124 is supplied to the cylinder 23 and the inside of the cylinder 23 is pressurized so that the coffee is conveyed to the outside. Instead, a gear pump or a tube pump is used. It may be adopted and conveyed outside by sucking the coffee in the cylinder 23. Further, the detailed configuration of the coffee extraction device 2 shown in the embodiment is merely an example, and can be appropriately changed within the scope of the gist of the present invention.

1 Cup type vending machine 2 Coffee extraction device (beverage extraction device)
7 Control device (paper breakage determination means, motor current detection means, lock determination means)
21 Drip unit (extraction unit)
22 Drive unit 88 Driven gear 93 Gear lock member 94 Gear lock mechanism (lock mechanism)
151 Second motor (drive source, motor)
152a Output shaft 154 Paper drawer drive unit 160 Paper drawer mechanism 166 Drive gear 201 Paper holder 202 Paper breakage detection plate (movable member)
P Paper filter Pr Paper filter roll

Claims (2)

A beverage extraction device for extracting a beverage using raw materials and water,
A drive unit having a drive source;
An extraction unit that is detachably attached to the drive unit and that is driven by the drive source to extract a beverage;
Holding a continuous paper filter for filtering the beverage, and a paper holder attached to the extraction unit;
By being driven by the drive source, the paper filter is pulled out from the paper holder and sent to the extraction unit, thereby moving the used part of the paper filter used for beverage filtration to the outside of the extraction unit. And a paper drawer mechanism for moving an unused part following the used part of the paper filter to the extraction unit;
With
The paper filter has a roll portion that is wound in a roll shape and rotatably supported by the paper holder,
A movable member that contacts the outer peripheral surface of the roll portion and is movable while following the roll portion whose diameter decreases with use of the paper filter, and when the movable member reaches a predetermined position A lock mechanism for locking the paper drawer mechanism in an inoperable state;
When the paper drawer mechanism is locked, a paper out judging means for judging that paper is out of paper,
A beverage extraction device further comprising: The drive source is a motor;
The paper piece judging means is
Motor current detecting means for detecting a current value flowing through the motor;
Lock determination means for determining whether or not the paper drawer mechanism is locked by determining whether or not the motor is locked in a non-rotatable state based on the detected current value;
The beverage extraction device according to claim 1, comprising:

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