JP4650348B2 - Beverage extractor - Google Patents

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. The beverage extraction device includes a main body unit and a beverage extraction unit that is 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 performs beverage extraction, and includes a cylinder, upper and lower pistons, a pair of left and right cam gears, a driven gear, and the like. In the state where the beverage extraction unit is attached to the main body unit, the driven gear on the beverage extraction unit side meshes with the drive gear on the main body unit side. When the beverage is extracted, the motor on the main unit side is operated, and the power is transmitted to the driven gear on the beverage extraction unit side via the drive gear. As the driven gear rotates, both the cam gears rotate, so that the cylinder and the upper and lower pistons are appropriately driven by both cam gears, and the beverage is extracted.

  The main body unit is provided with a lock mechanism for locking the beverage extraction unit in a state where the beverage extraction unit is attached. This lock mechanism is composed of a lock knob that can be rotated, and two upper and lower lock claws that appear in and out of the beverage extraction unit in conjunction with the rotation operation of the lock knob. The beverage extraction unit is provided with two upper and lower lock grooves at positions corresponding to both lock claws. When locking the beverage extraction unit, after attaching the beverage extraction unit to the main unit, the lock knob is turned 90 degrees in a predetermined direction. Thereby, when the upper and lower lock claws enter the lock groove of the beverage extraction unit, the beverage extraction unit is locked in a state of being attached to the main body unit. In addition, when removing the locked beverage extraction unit from the main unit, the beverage extraction unit is unlocked by turning the lock knob 90 degrees in the opposite direction to the above, and then the beverage extraction unit is removed from the main unit. .

  As described above, in the beverage extraction device described above, the beverage extraction unit attached to the main unit can be easily locked and released simply by turning the lock knob. However, in this beverage extraction device, the lock can be released even while the device is in operation. For example, during maintenance, the operator has forgotten to lock the beverage extraction unit and checks the operation. If the beverage extraction unit is mistakenly removed from the main unit while the apparatus is in operation, the apparatus may break down due to damage to the gears engaged with each other. In addition, the beverage extraction unit that substantially extracts the beverage and the main body unit that drives the beverage can be separated, and the beverage is configured to operate while maintaining a certain mechanical relationship between the two units. In the extraction device, if the beverage extraction unit is removed from the main unit while the device is in operation, the relationship (consistency) between the two units will be lost, and if the beverage extraction unit is attached to the main unit in that state, The device may not be able to operate properly.

  The present invention has been made to solve the above-described problems, and can reliably prevent the extraction unit attached to the drive unit from being removed during the operation of the apparatus. Another object is to provide a beverage extraction device that can prevent malfunctions.

JP-A-2005-245860

  In order to achieve the above object, the invention according to claim 1 is a beverage extraction apparatus for extracting a beverage using raw materials and water, and is driven by a drive unit having a drive mechanism and the drive mechanism. And a unit lock position for locking the extraction unit attached to the drive unit, and a unit lock release for releasing the lock. The extraction mechanism has a holding member for holding the unit lock member in the unit lock position by engaging the unit lock member during driving by the drive mechanism. It is characterized by that.

  According to this configuration, the extraction unit having the extraction mechanism driven by the drive mechanism is detachably attached to the drive unit having the drive mechanism. Further, by moving the unit lock member to the unit lock position, the extraction unit is locked in a state of being attached to the drive unit, and by moving to the unit lock release position, the extraction unit is unlocked. The holding member of the extraction mechanism is engaged with the unit lock member during driving by the drive mechanism, thereby holding the unit lock member in the unit lock position. Therefore, the extraction unit is removed from the drive unit during operation of the apparatus. Can be reliably prevented. Thereby, failure or malfunction of the device can be prevented.

  According to a second aspect of the present invention, the beverage extraction device according to the first aspect further comprises an extraction mechanism locking means for locking the extraction mechanism in an inoperable state when the extraction unit is detached from the drive unit. It is characterized by being.

  According to this configuration, when the extraction unit is detached from the drive unit, the extraction mechanism is locked in an inoperable state by the extraction mechanism locking means. Thereby, for example, when the extraction mechanism of the extraction unit is configured to be driven while maintaining a mechanical fixed relationship with the drive mechanism of the drive unit, even if the extraction unit is removed from the drive unit, The above relationship (consistency) can be maintained. Therefore, after the extraction unit is attached to the drive unit, the above relationship can be continued, whereby the apparatus can be operated properly.

  The invention according to claim 3 is the beverage extraction apparatus according to claim 2, wherein the extraction mechanism has a driven gear that is rotationally driven by the drive mechanism in a state where the extraction unit is attached to the drive unit. The extraction mechanism locking means is provided in the extraction unit, and is engaged with the gear teeth of the driven gear to lock the driven gear in a non-rotatable state. The extraction mechanism locking means is released from the driven gear and unlocks the driven gear. A gear lock member that is movable between the gear lock release position, an urging means that urges the gear lock member toward the gear lock position, and a drive unit provided with the extraction unit attached to the drive unit. By engaging the member, the gear lock member that holds the gear lock member in the gear lock release position against the biasing force of the biasing means. Characterized in that it comprises a Unlock member.

  According to this configuration, in a state where the extraction unit is attached to the drive unit, the gear lock releasing member on the drive unit side is engaged with the gear lock member on the extraction unit side, thereby resisting the biasing force of the biasing means. The gear lock member is held at the gear lock release position. As a result, the driven gear of the extraction mechanism can be rotated by the drive mechanism on the drive unit side. Further, when the extraction unit is removed from the drive unit, the holding of the gear lock member by the gear lock release member is released, whereby the gear lock member is moved to the gear lock position by the urging force of the urging means, Engage between the gear teeth of the driven gear. As a result, the driven gear is locked in a non-rotatable state. As described above, according to the above configuration, the extraction mechanism locking means that locks the extraction mechanism in an inoperable state when the extraction unit is removed from the drive unit can be realized with a simple configuration.

  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, a cream / sugar supply device 6 for supplying the mixing bowl 5 with cream and sugar, and a control device having a microcomputer for controlling them ( (Not shown).

  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 supplied from 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. 2 and 3 show the coffee brewing device 2. As shown in both the drawings, the coffee extraction device 2 includes a drip unit 21 (extraction unit) for extracting coffee and a drive unit 22 that drives the drip unit 21. The drive unit 22 is fixed in the vending machine 1 by screwing or the like, and the drip unit 21 is detachably attached to the drive unit 22.

  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. 4 shows a state where the cylinder 23 is removed from the cylinder holder 24. The cylinder 23 is made of transparent plastic, and is formed in a cylindrical shape extending in the vertical direction and having an upper surface and a lower surface open as shown in FIG. 5 and 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 portion 26 is provided with an upper guide portion 26 and a lower guide portion 26 that are provided vertically apart from each other at a predetermined interval and are formed symmetrically in the vertical direction. Each guide portion 26 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. . Further, the base end portions (end portions on the handle 25 side) 26a of the upper and lower guide portions 26, 26 are formed so that the former extends upward and the latter extends downward. As described above, since the cylinder 23 is formed symmetrically in the vertical direction, the cylinder 23 can be attached to the cylinder holder 24 regardless of the vertical direction.

  As shown in FIG. 6, the cylinder holder 24 is provided in a frame 31 having a cylinder accommodating portion 24 a on the inner side and a lower part in the frame 31 so as to be movable up and down, and conveys the coffee in the cylinder 23 to the outside while filtering. A filter block 32 for removing the extracted soot remaining on the filter block 32, a filter block 32 provided in the lower portion of the frame 31, and a cylinder housing portion provided in the frame 31. The cylinder catcher 34 etc. which hold | maintain the cylinder 23 accommodated in 24a in the state pinched | interposed from right and left are provided.

  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. Have. Although not shown, the bottom wall 43 is configured to connect the side walls 41 with a plurality of bar-shaped support members that extend in the left-right direction and are appropriately spaced in the front-rear direction.

  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. 7, in each side wall 41, a cylinder opening / closing mechanism 51 (extraction mechanism) 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. Further, a hollow shaft housing portion 46 is provided between the front upper corner portions of the left and right side wall main bodies 44, 44 so as to extend in the left-right direction. A power transmission shaft 52 for transmitting power from the left cylinder opening / closing mechanism 51 shown in FIG. 7A to the right cylinder opening / closing mechanism 51 shown in FIG. Is housed in. Since the left and right cylinder opening / closing mechanisms 51 and 51 are provided symmetrically in the left and right side walls 41 and 41, the following description will focus on what is built in the left side wall 41.

  As shown in FIGS. 7 and 8, the cylinder opening / closing mechanism 51 is rotatably supported by a support shaft 44a projecting at a predetermined position in the vicinity of the center in the side wall main body 44, and has first and second cams having a predetermined shape. A cam disk 55 (holding member) 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 the cylinder block 32 Are connected to a slider 56 and a support shaft 44b projecting at a predetermined position in the upper portion of the side wall body 44, and engage with a second cam groove 54 of the cam disk 55 and will be described later. A cylinder head locking member 57 for locking the cylinder head 111 in a state of being pressed against the upper surface of the cylinder 23 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. In addition, a convex portion 55b that protrudes slightly in the radial direction by approximately ¼ 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. 9, the first cam groove 53 is provided at the peripheral edge of the side surface of the cam disk 55, and has a circular shape centered on the support shaft 44 a of the cam disk 55 and substantially makes a round in the clockwise direction. An outer cam portion 61 extending to the outer cam portion 61, a drive cam portion 62 extending in an arc shape toward the support shaft 44a, and an arc shape centering on the support shaft 44a. And it is comprised by the inner side cam part 63 extended so that a round may be carried out in the vicinity of the spindle 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, and has an arc shape centered on the support shaft 44a and substantially clockwise from the vicinity of the distal end portion of the outer cam portion 61. An outer cam portion 64 extending in the shape of a 3/4 arc, a drive cam portion 65 extending to the outer cam portion 64 and extending toward the support shaft 44a, and a circle centering on the support shaft 44a. The inner cam portion 66 extends in an arc shape.

  As shown in FIG. 8B, the slider 56 is formed in a substantially convex shape, extending in the vertical direction and having its lower portion widened downward. At the upper end portion of the slider 56, an engaging convex portion 56a protruding toward the cam disc 55 is provided, and the engaging convex portion 56a is slidable in the first cam groove 53 of the cam disc 55. Is engaged. Two connecting shafts 71, 71 that connect the slider 56 and the filter block 32 are fixed to the lower end portion of the slider 56. Both the connecting shafts 71, 71 extend in parallel to each other in the left-right direction (the front-back direction in the drawing in FIG. 8) with a space in the front-rear direction (the left-right direction in FIG. 8). Each connecting shaft 71 passes through a long hole 44c extending in the vertical direction of the side wall main body 44, and has one end fixed to the slider 56 and the other end fixed to the slider 56 of the right 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. 8B and FIG. 9 rotates counterclockwise in both figures, and the engagement convex portion 56 a of the slider 56 is the outer cam portion of the first cam groove 53. By sliding the drive cam portion 62 from 61 to the inner cam portion 63, the slider 56 rises. Then, when the engaging projection 56a of the slider 56 reaches the inner cam portion 63, the filter block 32 is closed in close contact with the lower surface of the cylinder 23 (see FIG. 22B). On the other hand, from this state, the cam disk 55 rotates in the clockwise direction and the slider 56 descends, so that the filter block 32 also descends, thereby opening the lower surface of the cylinder 23 (FIG. 24A). reference).

  As shown in FIGS. 6, 7 and 10, the filter block 32 includes a circular filter 72 having a large number of pores 72 a for filtering coffee and formed slightly smaller than the inner diameter of the cylinder 23. 72, and a wide ring-shaped packing 73 having a larger outer diameter than the lower surface of the cylinder 23, and supporting these on the upper surface, and communicating with the upper and lower sides. A block-like support member 74 having a passage is used. As described above, the filter block 32 moves up and down as the slider 56 slides in the vertical direction, and when the lower surface of the cylinder 23 is closed, the upper surface of the packing 73 is in contact with the peripheral surface of the lower surface of the cylinder 23. Seal this. Further, a filter block tube 32 a is connected between the support member 74 of the filter block 32 and the joint hose 40 (see FIG. 7B) provided at the lower rear end of the right side wall 41. The joint hose 40 is connected to a joint hose 120 described later of the drive unit 22.

  As shown in FIG. 8B, the cylinder head lock member 57 is formed in a predetermined shape extending in the vertical direction, and the center portion thereof is rotatably supported by the support shaft 44 b in the side wall body 44. 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. 8B and FIG. 9 rotates counterclockwise in both figures, and the engagement convex portion 57 a of the cylinder head lock member 57 is formed in the second cam groove 54. By sliding the drive cam portion 65 from the outer cam portion 64 toward the inner cam portion 66, the cylinder head lock member 57 rotates counterclockwise in FIG. 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. 23B).

  As described above, the cylinder opening / closing mechanism 51 configured as described above is incorporated in the left and right side walls 41, 41, respectively, and the gear portion 55a of the cam disk 55 of both the cylinder opening / closing mechanisms 51, 51 corresponds. Meshed with a connecting gear 75 rotatably provided at the front upper corner in the side wall main body 44. And these connection gears 75 and 75 are being fixed to the edge part of the said power transmission shaft 52, respectively. Further, as shown in FIG. 8, the rear end portion of the left side wall 41 is rotatably supported by a support shaft 44f protruding at a predetermined position in the side wall main body 44, and the left cam disc 55 A driven joint gear 76 (driven gear) that meshes with the gear portion 55a is provided. The driven joint gear 76 is slightly exposed to the rear, and meshes with a drive joint gear 134 (to be described later) on the drive unit 22 side when the drip unit 21 is attached to the drive unit 22. Accordingly, when the driven joint gear 76 rotates, the left cam disk 55 meshing with the driven joint gear 76 rotates, and the right cam disk 55 synchronizes with the left cam disk via both the connecting gears 75 and 75 and the power transmission shaft 52. Rotate.

  Next, the scraper 33 will be described. As shown in FIGS. 4, 6, and 10, the scraper 33 includes a support 77 formed in a rectangular frame shape whose planar shape is larger than that of the filter block 32, rubber, and the like, along the bottom front end portion of the support 77. And a scraper body 78 that extends in the left-right direction and hangs down. As shown in FIG. 10, a groove 77a that extends in the left-right direction and opens upward is provided at the rear end of the support 77 (the upper end in the figure). In addition, an open portion 77b opened rearward is provided at a substantially central portion in the left-right direction of the groove portion 77a.

  The scraper 33 configured as described above is slidable in the front-rear direction while being guided between the left and right side wall main bodies 44, 44. The scraper 33 is driven rearward by a scraper / cylinder head driving mechanism 123 to be described later, so that the scraper body 78 at the front end slides rearward on the filter block 32. Thereby, the extracted soot remaining on the filter block 32 after the coffee extraction is scraped off by the scraper body 78 and discharged to the outside via the soot chute 161 described later of the drive unit 22.

  Note that a scraper lock portion 79 is provided on the back wall 42 of the frame 31 to prevent the scraper 33 from falling off from the back side of the drip unit 21 when the drip unit 21 is detached from the drive unit 22. Yes. As shown in FIG. 7B, the scraper lock portion 79 is rotatably supported by a support shaft 79a extending in the left-right direction, and a lock piece 79b extending up and down the support shaft 79a, and a lower end of the lock piece 79b. And a torsion spring 79c that biases the portion so as to face the groove 77a of the scraper 33. When the scraper 33 is locked by the lower end portion of the lock piece 79b facing the groove portion 77a of the scraper 33, whereby the drip unit 21 is removed from the drive unit 22 and the back wall 42 is directed downward. However, the scraper 33 can be prevented from falling off the drip unit 21. In the state where the drip unit 21 is attached to the drive unit 22, the upper end of the lock piece 79b is pushed by a scraper lock release projection 108b provided on the drive unit 22 side, which will be described later. The lock of the scraper 33 is released.

  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 left side wall 41.

  As shown in FIGS. 7 and 8, the drip unit attaching / detaching mechanism 81 is provided with a unit lock member 82 that is slidable in the vertical direction at the rear end of the side wall main body 44, and the unit lock member 82 is attached to the lower side. 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 upper and lower end portions are provided with hook-shaped lock portions 82a and 82a protruding rearward. 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. In addition, a protrusion 82 d that is located immediately above the rear end 84 b of the removal lever 84 and protrudes toward the outer cover 45 is provided at the lower portion of the unit lock member 82.

  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, and is positioned 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 abuts against the 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 latched (unit lock position) in an engagement hole 108d (see FIGS. 3 and 14A), 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. Further, when removing the drip unit 21 from the drive unit 22, the front end portions 84a and 84a of the two removal levers 84 and 84 are simultaneously pushed down. As a result, as shown in FIG. 11A, the unit lock member 82 is pushed up against the spring 83 by the removal lever 84, whereby the lock portion 82a with respect to the engagement hole 108d on the drive unit 22 side is pushed. The lock is released (unit lock release position). In this state, the drip unit 21 is removed from the drive unit 22 by pulling the drip unit 21 forward.

  In addition, two upper and lower guide projections 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.

  Further, as shown in FIG. 8B, when the cam disk 55 is located at the standby position, the engagement convex portion 82 c of the unit lock member 82 is located at the tip 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. 22B). As a result, the unit lock member 82 cannot be moved upward, and the removal lever 84 cannot be operated. Therefore, the drip unit 21 can be detached from the drive unit 22 only when the cam disk 55 is positioned at the standby position. The drip unit 21 is removed when the cam disk 55 is rotating. Can be prevented.

  Further, as shown in FIG. 8, a cam lock member 85 (extraction mechanism) is provided on the left side wall 41 to lock the cam disk 55 so that the cam disk 55 does not rotate when the drip unit 21 is removed from the drive unit 22. Locking means and gear locking member). The cam lock member 85 includes a slide portion 85a that is slidable in a vertical direction at a predetermined position near the rear end in the side wall body 44, and a vertically long lock portion 85b that protrudes from a lower end portion of the slide portion 85a. , And an inclined portion 85c which is provided at the rear end portion of the slide portion 85a. The cam lock member 85 is biased downward by a spring 86 (biasing means).

  In a state where the drip unit 21 is detached from the drive unit 22, as shown in FIG. 8, the lock portion 85b of the cam lock member 85 is inserted between the gear teeth of the driven joint gear 76 (gear lock position). As a result, the driven joint gear 76 is locked so as not to rotate. Therefore, the cam disk 55 meshing with the driven joint gear 76 is also locked so as not to rotate. When the drip unit 21 is attached to the drive unit 22, a later-described gear lock release convex portion 108 c (extraction mechanism lock means, gear lock release member) of the drive unit 22 engages with the inclined portion 85 c of the cam lock member 85. As a result, the lock of the driven joint gear 76 and the cam disk 55 is released. That is, as shown in FIG. 11 (b), the gear lock release convex portion 108 c comes into contact with the inclined portion 85 c of the cam lock member 85 from the rear, so that the cam lock member 85 slides upward against the spring 86. The lock portion 85b is disengaged from the driven joint gear 76 (gear lock release position). As a result, the driven joint gear 76 and the cam disk 55 are unlocked and become rotatable.

  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 136 and the cam disk 55.

  Next, the cylinder catcher 34 that holds the cylinder 23 accommodated in the cylinder holder 24 will be described. As shown in FIG. 6A and FIG. 12A cut along line AA in FIG. 6B, the cylinder catcher 34 rotates the pair of left and right grip arms 91 and 91 and both grip arms 91 and 91. An arm support 92 that is freely supported, an arm locking member 93 for locking both gripping arms 91 and 91 to a cylinder release position to be described later, and urging the arm locking member 93 toward the gripping arms 91 and 91. It comprises a pair of left and right springs 94, 94.

  The arm support 92 includes a wall portion 92a having a rectangular front shape and left and right support portions 92b and 92b extending forward from the left and right end portions of the wall portion 92a, respectively, and the planar shape is a U-shape that is open forward. Is formed. And the holding | grip arm 91 is arrange | positioned on the outer side of both the support parts 92b and 92b, respectively. Both the holding arms 91, 91 are arranged so as to face each other with a predetermined interval in the left-right direction. As shown in FIG. 12A, each gripping arm 91 extends in the front-rear direction (vertical direction in the figure), is formed in a convex shape with the front end protruding inward, and the rear end is narrow. Is formed. Further, the grip arm 91 is rotatably supported by the support portion 92b of the arm support 92 around the rotation shaft 95 extending in the vertical direction at a position closer to the rear end than the central portion in the front-rear direction. . Specifically, the gripping arms 91 and 91 extend substantially parallel to each other in the front-rear direction, the release position (the position shown in FIG. 12A) for releasing the cylinder 23, and the front end portions approach each other, It is freely rotatable between a holding position (position shown in FIG. 5B) that holds 23 in a state sandwiched from the left and right. Further, a torsion spring 95a is provided on the rotation shaft 95 of each gripping arm 91, and each gripping arm 91 is urged toward the holding position by the torsion spring 95a.

  Further, the wall portion 92a of the arm support 92 is screwed to a fixed plate 96 having a predetermined shape disposed behind the arm support 92. As shown in FIG. 6B, the wall portion 92a extends in the left-right direction and has a space in the vertical direction. There are two long holes 92c, 92c separated from each other. In addition, two abutted pieces 97a and 97a, which will be described later, of the arm locking member 93 pass through the long holes 92c and 92c from the rear.

  As shown in FIG. 12A, the arm locking member 93 is provided on the back side of the arm support 92 so as to be slidable in the front-rear direction. The arm locking member 93 projects forward from a lateral member 97 longer than the lateral width of the wall 92a of the arm support 92 and the left and right ends of the lateral member 97, and the left and right grip arms 91, 91. With the engaging portions 98 that respectively engage with each other, the planar shape is formed in a U-shape that opens forward. At the center in the left-right direction of the cross member 97, there are two upper and lower contact pieces corresponding to the elongated holes 92c, 92c of the arm support 92 and projecting forward so as to face between the gripping arms 91, 91. 97a and 97a are provided. Further, the left and right engaging portions 98 are disposed so as to have a predetermined interval between the corresponding support portions 92b of the arm support 92, and a predetermined inclined surface 98a facing the support portion 92b side at the front end portion. have.

  According to the cylinder catcher 34 configured as described above, as shown in FIG. 12 (b), when the cylinder 23 is accommodated in the cylinder holder 24, both of the two biased toward the holding position by the torsion spring 95a. The gripping arms 91 and 91 hold the cylinder 23 from the left and right. More specifically, the holding arms 91 and 91 have their front end portions in contact with a position closer to the handle 25 on the front side than the side of the cylinder 23 so that the cylinder 23 is pulled into the back side of the cylinder housing portion 24a. , Sandwich from the left and right. In this case, in the cylinder 23, the base end portion 26a of each guide portion 26 comes into contact with the front ends of the left and right support portions 92b, 92b of the arm support 92, so that the filter 72 and the packing 73 of the filter block 32 are directly above. Is positioned.

  Moreover, when removing the cylinder 23 from the cylinder holder 24 from this state, it can be easily removed by grasping the handle 25 and pulling it forward. In this case, both gripping arms 91 and 91 are pressed toward the release position by the cylinder 23 that is pulled out. When the rear ends of the gripping arms 91 and 91 are disengaged from the inclined surface 98a of the arm locking member 93 that has been in contact, the arm locking member 93 biased by the springs 94 and 94 slides forward. Then, the rear end portion of the grip arm 91 is sandwiched between the left and right engaging portions 98 and 98 and the corresponding left and right support portions 92 b and 92 b of the arm support 92. Thereby, both the holding arms 91 and 91 are held in the release position as shown in FIG.

  Further, when the cylinder 23 is inserted into the cylinder holder 24 from this state, the handle 25 is grasped and the cylinder 23 is pushed into the cylinder housing portion 24a from the front. In this case, the cylinder 23 is guided by the both gripping arms 91 and 91 by pushing the cylinder 23 so that the both gripping arms 91 and 91 are positioned between the upper and lower guide portions 26 and 26 of the cylinder 23. It can be easily pushed into the cylinder housing portion 24a. Further, by pushing the cylinder 23 into the cylinder housing portion 24 a, the portion of the cylinder 23 opposite to the handle 25 comes into contact with the two contact pieces 97 a and 97 a of the arm locking member 93. When the cylinder 23 is further pushed in, the arm locking member 93 slides backward against the springs 94, 94, and the arm holding member 93 and the arm support 92 are in the release positions of the both gripping arms 91, 91. The lock is released. Thereby, as shown in FIG.12 (b), both the holding arms 91 and 91 rotate to a holding position, and hold | maintain firmly in the state which pinched | interposed the cylinder 23 with the urging | biasing force of the torsion spring 95a.

  As shown in FIGS. 2 to 4 and 13, an openable / closable front cover 35 is provided on the front surface of the cylinder holder 24. The front cover 35 is made of transparent plastic or the like, and the front shape is formed in a vertically long rectangular shape. As shown in FIG. 13, left and right hooks 35 a and 35 a are provided at the upper end portion of the front cover 35, and these hooks 35 a and 35 a are attached to the shaft accommodating portion 46 at the front upper end portion of the cylinder holder 24. , And is pivotably locked. Further, the left and right end portions of the front cover 35 are formed in substantially the same shape as the concave portions 41a of the left and right side walls 41, 41, and a lever cover portion 35b that covers the front end portion 84a of the detachable lever 84 located inside the concave portions. , 35b are provided. As a result, as shown in FIG. 5A, the removal lever 84 cannot be operated from the outside when the front cover 35 is closed.

  Further, the coffee extraction device 2 is provided with an operation prohibiting section 36 that prohibits the operation of the coffee extraction device 2 when the front cover 35 is opened. As shown in FIG. 13, the operation prohibiting portion 36 includes a slide rod 37 that is slidable in the front-rear direction at the lower left corner of the cylinder holder 24, and a drive unit that is turned ON / OFF by the slide rod 37. And a micro switch 38 connected to an electric circuit between first and second motors 131 and 151 (to be described later) of the drive unit 22 and a power source. The slide rod 37 extends so as to penetrate the cylinder holder 24 in the front-rear direction, and is urged forward by a spring 39 provided at the rear portion with a relatively small urging force. Specifically, as shown in FIG. 13B, when the front cover 35 is opened, the front end of the slide rod 37 slightly protrudes forward from the back of the front cover 35 in a closed state. When the rear end portion is separated from the microswitch 38, the microswitch 38 is turned off. On the other hand, when the front cover 35 is closed, the slide rod 37 is pressed backward against the spring 39 by the weight of the front cover 35 as shown in FIG. 38 is turned on. The microswitch 38 shuts off the electrical circuit when it is in the OFF state shown in FIG.

  Although not shown, a torsion spring may be provided in the shaft housing portion 46 that rotatably supports the front cover 35 at its upper end, and the front cover 35 may be urged in the closing direction by the spring. In this case, the front cover 35 is reliably closed by the urging force of the spring, and the slide rod 37 can be pressed from the front by the front cover 35, so that the micro switch 38 can be reliably turned on.

  According to the operation prohibition unit 36 configured as described above, when the front cover 35 is accidentally opened during the operation of the coffee extraction device 2, the coffee extraction device 2 can be reliably stopped, The safety of the coffee extraction device 2 can be ensured. Further, since the cylinder 23 cannot be taken in and out of the cylinder holder 24 unless the front cover 35 is opened, the coffee brewing device 2 does not operate erroneously when the cylinder 23 is taken in and out. Safe entry and exit is possible. Furthermore, in the state where the front cover 35 is closed, even if hot water or coffee is ejected from the cylinder 23, it is possible to prevent them from jumping out to the front of the coffee extraction device 2.

  Next, the drive unit 22 will be described. As shown in FIGS. 2, 3 and 14 to 17, the drive unit 22 includes a case 101 constituting an outer shell thereof, and a cylinder head cover 102 provided so as to protrude forward on the front upper portion of the case 101. ing. The case 101 is formed in a box shape by screwing a plurality of metal plates having a predetermined shape.

  The front wall 108 constituting the front surface of the case 101 is formed with an opening 108a that is open to the lower half of the front wall 108. When the above-described scraper 33 is driven rearward, the opening 108a is opened. Through the drive unit 22. Further, a scraper lock release convex portion 108b and a gear lock release convex portion 108c are provided at the center and left end of the upper edge portion of the opening 108a of the front wall 108, respectively. As described above, in the state where the drip unit 21 is attached to the drive unit 22, the scraper lock releasing convex portion 108b abuts on the lock piece 79b of the scraper lock portion 79 on the drip unit 21 side, whereby the scraper 33 is locked. The cam disk 55 is unlocked when the gear lock releasing convex portion 108c comes into contact with the inclined portion 85c of the cam lock member 85.

  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.

  Also, a pair of cylinder head supports 103, 103 protruding forward and having a reverse U-shape in front are screwed to the left and right ends of the upper front portion of the case 101. The cylinder head cover 102 is screwed between the cylinder head supports 103 and 103.

  The cylinder head cover 102 is formed in a case shape having an open bottom surface, and a raw material chute 104, a hot water supply port 105, and a steam vent duct 106 are provided at predetermined positions on the top surface, all of which penetrate vertically and protrude upward. It has been. In the cylinder head cover 102, a cylinder head 111 that opens and closes the upper surface of the cylinder 23 is slidable in the front-rear direction.

  As shown in FIG. 18, the cylinder head 111 is formed in a circular shape whose planar shape is larger than the upper surface of the cylinder 23. A wide ring-shaped packing 112 having an inner surface smaller than the inner diameter of the cylinder 23 and an outer diameter larger than the outer diameter of the cylinder 23 is provided on the lower surface periphery of the cylinder head 111. . The upper part of the cylinder head 111 is formed in a truncated cone shape, and an air supply pipe 113 is connected to the upper end of the cylinder head 111 to supply air to the lower part of the cylinder head 111 from the outside. Yes. In addition, 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. 18A) is provided at the upper end portion 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 scraper / cylinder head driving mechanism 123, which will be described later, is engaged with the long hole 116b. The slider 116 slides in the front-rear direction while being guided by the head guide member 117 having a predetermined shape.

  As shown in FIG. 18, 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 mounted state.

  Next, the structure in the case 101 of the drive unit 22 will be described. As shown in FIGS. 14 to 17, the case 101 includes a cam drive mechanism 121 (drive mechanism) that drives the cam disc 55 of the drip unit 21 and a pinch drive mechanism 122 that drives a plurality of pinches 8 described later. And a scraper / cylinder head driving mechanism 123 for driving the scraper 33 and the cylinder head 111, an air pump 124 for supplying air to the cylinder 23, and the like.

  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 76 on the drip unit 21 side are provided. The gear box 132, the drive joint gear 134, and the like are appropriately attached to a support plate 135 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 a control device (not shown) changes the rotation angle of the cam disk 55 according to those modes. Identify.

  The pinch drive mechanism 122 drives the pinch 8 for opening and closing a plurality of predetermined portions of the transport tube 7 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 7 and the pinch 8 are demonstrated easily. As shown in the figure, the transfer tube 7 includes a first air transfer tube 7A 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 the 2 air conveyance tube 7B, the drink conveyance tube 7C connected to the joint hose 120, respectively, and the waste liquid conveyance tube 7D. These transfer tubes 7A to 7D are all made of an elastic material such as rubber. 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.

  The pinch 8 is composed of four pinches 8 attached respectively in the middle of the transfer tubes 7A to 7D, specifically, a first air pinch 8A, a second air pinch 8B, a beverage pinch 8C, and a waste liquid pinch 8D. Yes. These pinches 8 </ b> A to 8 </ b> D are the same. For example, when described with reference to the waste liquid pinch 8 </ b> D shown in FIG. 15, each pinch 8 is a tube holder 141 that holds a portion of the transport tube 7 to which it is attached. And a pinch body 142 that is rotatably attached to the tube holder 141 and sandwiches the transport tube 7 in cooperation therewith, and is rotatably provided on the opposite side of the pinch body 142 from the transport tube 7. It is comprised with the cam 143 of the predetermined shape for pressing 142 to the conveyance tube 7 side. In the pinches 8A to 8D configured as described above, the first and second air pinches 8A and 8B are arranged adjacent to each other as shown in FIG. 14B, 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 face the second air pinch 8B, and the waste liquid pinch 8D is disposed below the second air pinch 8B. Among these pinches 8A to 8D, the first and second air pinches 8A and 8B and the beverage pinch 8C share a cam 143. The cam 143 (hereinafter referred to as “common cam 143A”) and the cam 143 of the waste liquid pinch 8D are rotatably connected to a link bar 144 extending in the vertical direction at each predetermined position, and are synchronized with each other. Rotate. The common cam 143 </ b> A is connected to the pinch drive mechanism 122.

  As shown in FIGS. 14 and 17, 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 portion of the output shaft 132a. The drive gear 147 fixed to the rotary shaft 146 of the common cam 143A, the output gear 145 and the two intermediate gears 148b meshing with the drive gear 147, and the shaft 148c connecting them, respectively. A power transmission unit 148 that transmits power to 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 disc 55, the filter block 32, the cylinder head lock member 57 by the former 121, and the four by the latter 122. The two pinches 8A to 8D are driven so as to be linked to each other. Thereby, at the time of coffee extraction, the opening and closing of the upper surface and the lower surface of the cylinder 23 and the opening and closing of the transport tubes 7A to 7D by the pinches 8A to 8D can be performed efficiently and appropriately.

  FIG. 19 shows a scraper / cylinder head drive mechanism 123. As shown in the figure, the scraper / cylinder head drive mechanism 123 is connected to a second motor 151 composed of a DC motor, and to the second motor 151. The output extends in the vertical direction and projects at both ends. A gear box 152 having a shaft 152a, and a cylinder head driving unit 153 and a scraper driving unit 154 provided at the upper and lower ends of the output shaft 152a, respectively.

  As shown in FIGS. 19 and 20, the cylinder head drive unit 153 is formed of a one-way clutch that has a circular planar shape and can rotate only in a predetermined direction along with the rotation of the output shaft 152a. . An engagement protrusion 153 a protruding upward is provided at the peripheral edge of the upper surface of the cylinder head drive unit 153, and the engagement protrusion 153 a is slid into a 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. 20A, 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 enters the recess 153b provided at a predetermined position on the side surface. By engaging with, the ON / OFF state of the micro switch 155 is switched.

  On the other hand, the scraper drive unit 154 is configured by a one-way clutch that can rotate only in the direction opposite to the cylinder head drive unit 153. An arm portion 154a extending horizontally for a predetermined length is provided at the lower portion of the scraper driving portion 154, and an engaging convex portion 154b extending downward is provided at a tip portion thereof. The engaging convex portion 154b is slidably engaged with the groove portion 77a of the support 77 of the scraper 33. When the drip unit 21 is attached to the drive unit 22, the engaging convex portion 154 b is inserted into the groove portion 77 a through the opening portion 77 b of the scraper 33, and conversely, the drip unit 21 is removed from the drive unit 22. When removing, the engaging convex part 154b engaged with the groove part 77a is detached from the groove part 77a via the opening part 77b.

  Also, before and after the scraper drive unit 154, two micro switches 156 and 156 for detecting the position of the scraper 33 by detecting the rotational position of the scraper drive unit 154, similarly to the cylinder head drive unit 153 described above. Is arranged. As shown in FIG. 21, in each micro switch 156, the tip of the switch lever 156a is always in contact with the side surface of the scraper driving unit 154, and the recess 154c provided at a predetermined position on the side surface of the switch lever 156a By engaging the state where the tip portion is inserted, the ON / OFF state of the micro switch 156 is switched.

  When the scraper driving section 154 rotates 180 degrees from the standby position shown in FIG. 21A, the scraper 33 is located behind (upward in FIG. 21) as shown in FIG. 21B. Slide to. As a result, the extracted soot on the filter block 32 is scraped back by the scraper body 78 and discharged into the lower soot bucket B (see FIG. 1) via the soot chute 161 provided at the lower part of the drive unit 22. Is done.

  As shown in FIG. 3, the scissors chute 161 slightly protrudes forward from the inside of the case 101 through the opening 108 a of the front wall 108, and has a U-shaped frame portion 162 whose planer shape is open to the rear. And a cover 163 that is provided inside the frame portion 162 and covers the front and upper sides of devices such as the air pump 124 disposed at the lower portion of the drive unit 22. Guide rails 162a for guiding the scraper 33 when the scraper 33 is slid in the front-rear direction are provided on the left and right upper ends of the case portion 101 of the frame portion 162, respectively. The cover 163 includes a front cover portion 163a that extends in the vertical direction, and an upper cover portion 163b that is connected to the upper end portion of the front cover 163a and that inclines backward and extends rearward. The frame portion 162 and the cover 163 configured as described above constitute a straw chute 161 at a substantially central portion of the coffee extraction device 2.

  A heater 171 (see FIG. 1) is provided below the drip unit 21. The cylinder holder 24 of the drip unit 21 is closed by the left and right side walls 41 and 41, the back wall 42, the front cover 35 and the cylinder head cover 102, except for the bottom surface. 24a is heated from below and appropriately maintained at a predetermined temperature (for example, 50 to 60 ° C.). Thereby, the temperature fall of the coffee at the time of coffee extraction can be suppressed. The heater 171 has a waterproof structure. Thereby, for example, when the cylinder 23 removed from the cylinder holder 24 and the drip unit 21 removed from the drive unit 22 are washed, and when the cylinder 23 and the drip unit 21 are returned to the original state, water droplets at the time of washing are heated. Even if it adheres to 171, the function of the heater 171 is not impaired.

  Next, the operation of the coffee brewing apparatus 2 configured as described above will be described with reference to FIGS. 22 to 24 showing the 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, the cylinder head 111 and the scraper 33 are mainly shown in the lower stage.

  FIG. 22A shows a standby state. In this standby state, the cam disk 55, the filter block 32, the scraper 33, and the cylinder head 111 are located at their standby positions, and the upper surface and the lower surface of the cylinder 23 are all open. In the standby state, as shown in (1) of FIG. 25, the first air pinch 8A, the second air pinch 8B, the beverage pinch 8C, and the waste liquid pinch 8D are all in an open state. Corresponding transfer tubes 7A to 7D 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 counterclockwise 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 through the inside of the scraper 33. Then, as shown in FIG. 5B, the cam disk 55 rotates about 120 degrees from the standby position, thereby sealing the filter block 32 in contact with the lower surface of the cylinder 23. Next, in this state, a predetermined amount of raw material is supplied from the raw material supply device 3 into the cylinder 23 via the raw material chute 104 of the cylinder head cover 102. When the raw material is charged, as shown in (2) of FIG. 25, the pinches 8A to 8D are all in an open state, as in the standby state.

  After supplying the raw material, the cam disk 55 stops with the stop of the first motor 131 when rotated about 180 degrees from the standby position, as shown in FIG. In this state, as shown in (3) of FIG. 25, only the second air pinch 8B is opened, and the other pinches 8A, 8C, and 8D are all closed. Then, a predetermined amount of hot water is supplied from the hot water tank 13 into the cylinder 23 via the hot water supply port 105 of the cylinder head cover 102, and then the air pump 124 is operated for a predetermined time (for example, several seconds), so that the air is It is sent to the filter block 32 via the second air transfer tube 7B and the filter block tube 32a. This air passes through the filter 72 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 of the cylinder head cover 102.

  After the agitation, the second motor 151 of the scraper / cylinder head drive mechanism 123 rotates in a predetermined direction, and the cylinder head drive unit 153 moves from the standby position shown in FIG. Thus, when it rotates 180 degree | times, the 2nd motor 151 stops. As a result, the cylinder head 111 moves forward from the standby position and reaches directly above the cylinder 23 as shown in FIGS. In this case, the cylinder head 111 is slightly lowered as shown in FIG. 23 (a) when the upper head guide shaft 114 moves 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. From this state, the first motor 131 of the cam drive mechanism 121 rotates again, whereby the cam disk 55 further rotates. Then, as shown in FIG. 4B, when the cam disk 55 rotates about 240 degrees from the standby position, the cylinder head lock member 57 engaged 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. Further, in this state, as shown in FIG. 25 (4), the first air pinch 8A and the beverage pinch 8C are opened, while the second air pinch 8B and the waste liquid pinch 8D are closed.

  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 7 </ b> A and further supplied into the cylinder 23. Thereby, the inside of the cylinder 23 is pressurized, and the extracted coffee is supplied to the cup C through the filter block tube 32a, the beverage transport tube 7C, the mixing bowl 5 and the beverage tube 5a.

  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. 23 (c), the head guide shaft 114 is unlocked by the cylinder head locking member 57 and the head guide shaft 114 is moved by the convex portion 55 b of the cam disk 55 in the middle. Pushed up. Then, the second motor 151 of the scraper / cylinder head driving mechanism 123 rotates in the same direction as described above, and the cylinder head driving unit 153 further rotates 180 degrees. As described above, as shown in FIG. 24A, the cylinder head 111 and the block filter 32 are returned to the standby position.

  Next, when the second motor 151 of the scraper / cylinder head drive mechanism 123 rotates in the opposite direction, the scraper drive unit 154 is moved from the standby position shown in FIG. Thus, when it rotates 180 degree | times, the 2nd motor 151 stops. As a result, the scraper 33 moves backward from the standby position as shown in both drawings. Accordingly, as shown in FIG. 24B, the extracted soot G remaining on the filter 72 of the filter block 32 is scraped to the rear of the filter block 32 by the scraper main body 78, and through the soot chute 161, It is discharged outside. Thereafter, the second motor 151 rotates in the same direction as described above, and the scraper driving unit 154 further rotates 180 degrees, so that the scraper 33 moves forward as shown in FIG. Return to position. Note that the above-described discharging operation of the extraction basket G by the scraper 33 may be performed a plurality of times by rotating the scraper driving unit 154 a plurality of times (for example, a few times). In this case, the extracted soot G on the filter 72 is scraped off a plurality of times, so that the filter 72 can be made cleaner. In addition, even when the engaging convex portion 154b of the scraper driving portion 154 is not properly engaged with the groove portion 77a of the scraper 33, the scraper 33 can be reliably engaged after one rotation, and the scraper 33 can discharge the extraction rod G. It can be executed reliably.

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

  In addition, although illustration is abbreviate | omitted, in the vending machine 1, the extraction process by the coffee extraction apparatus 2 is visible from the outside. Specifically, an LED for illuminating the cylinder housing portion 24 a is provided inside the cylinder head cover 102 of the drive unit 22, and a viewing window is provided in front of the coffee extraction device 2 of the vending machine 1. Thereby, the user of the vending machine 1 can be shown the coffee extraction process in the drip unit 21 through the viewing window and the transparent front cover 35 of the drip unit 21, and the effect of the extraction can be achieved. Can do. As a result, the user's interest can be raised and the use of the vending machine 1 can be promoted. In place of the above-mentioned viewing window, a video camera for photographing the drip unit 21 from the front is installed in the vending machine 1, and a display for displaying the photographed image is installed on the main door on the front of the vending machine. You may do it.

  As described above in detail, according to the present embodiment, the cylinder 23 whose inner surface is easily soiled by repeated extraction of coffee can be easily attached to and detached from the cylinder holder 24. Maintenance such as cleaning can be easily performed. In addition, since the drip unit 21 having the filter block 32 and the scraper 33 that have no electrical components and is relatively easily soiled can be easily attached to and detached from the drive unit 22 having electrical components such as a motor, the drip unit 21 including the attaching and detaching operations is included. Maintenance such as cleaning can be easily performed.

  Further, the cam disk 55 that is driven to open and close the upper surface and the lower surface of the cylinder 23 and the pinches 8A to 8D that open and close the transport tubes 7A to 7D are driven by the common first motor 131. An increase in the manufacturing cost of the coffee brewing device 2 can be suppressed as compared with the case where each is driven by a motor. In addition, since the cylinder head 111 and the scraper 33 are driven by the common second motor 151, an increase in the manufacturing cost of the coffee brewing apparatus 2 can be suppressed as described above.

  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. Further, in the embodiment, at the time of extraction, air is supplied from the air pump 124 to the cylinder 23 and the inside of the cylinder 23 is pressurized so as to convey the beverage to the outside. Instead, a gear pump or a tube pump is used. It may be adopted and conveyed outside by sucking the beverage 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.

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 perspective view which shows a coffee extraction apparatus. It is a perspective view which shows the coffee extraction apparatus of the state from which the drip unit was removed from 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 right and left outer cover of the cylinder holder, (a) is a perspective view when it sees from the front side, (b) is a perspective view when it sees from the back side. It is a side view which shows the internal structure of the left side wall of a cylinder holder, (a) is the state which abbreviate | omitted the outer cover, (b) shows the state which displayed the cam groove of the cam disk 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. 6 by the AA line. It is a side view which shows the internal structure of the left side wall of a cylinder holder, (a) shows the state which pushed down the removal lever, (b) shows the state by which the lock | rock of the cam disc was cancelled | released. It is a figure which shows the state which cut | disconnected the cylinder holder shown in FIG. 6 by the BB line, (a) shows the state in which the holding arm was located in the release position, (b) shows the state in which the holding arm was located in the holding position. . It is explanatory drawing for demonstrating operation | movement of the front cover of a cylinder holder, (a) shows the state which closed the front cover, (b) shows the state which opened the front cover slightly. It is a front 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 right view which shows a drive unit, (a) is an external view, (b) is an internal structure figure. It is a rear view which shows the internal structure of a drive unit. It is a figure which shows a cylinder head, (a) is a top view, (b) is a left view. It is a figure which shows a scraper cylinder head drive mechanism, (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 scraper cylinder head drive mechanism, (a) is the state where the cylinder head was located in the standby position, (b) is the state where the cylinder head was located in the cylinder closed position Indicates. It is a figure for demonstrating operation | movement of the scraper by a scraper cylinder head drive mechanism, (a) shows the state in which the scraper was located in the stand-by position, and (b) shows the state in which the scraper was located in the extraction rod discharge position. . 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 supply of the raw material and hot water to a cylinder Indicates the state. FIG. 23 is an explanatory diagram following FIG. 22, (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. FIG. 24 is an explanatory diagram following FIG. 23, (a) is a state in which the filter block and the cylinder head are returned to the standby position after completion of extraction, (b) is a state in which the extraction basket has been discharged by the scraper, and (c) is a standby position in the scraper The state returned to. 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.

Explanation of symbols

1 Cup type vending machine 2 Coffee extraction device (beverage extraction device)
21 Drip unit (extraction unit)
22 Drive unit 51 Cylinder opening / closing mechanism (extraction mechanism)
55 Cam disc (holding member)
76 Driven joint gear (driven gear)
82 Unit lock member 85 Cam lock member (extraction mechanism lock means, gear lock member)
86 Spring (biasing means)
108c Gear lock release convex part (extraction mechanism lock means, gear lock release member)
121 Cam drive mechanism (drive mechanism)

Claims (3)

A beverage extraction device for extracting a beverage using raw materials and water,
A drive unit having a drive mechanism;
An extraction unit that has an extraction mechanism for extracting a beverage by being driven by the drive mechanism, and is detachably attached to the drive unit;
A unit lock position for locking the extraction unit in a state attached to the drive unit, and a unit lock member movable between a unit lock release position for releasing the lock, and
The beverage extraction device, wherein the extraction mechanism has a holding member that holds the unit lock member in the unit lock position by engaging the unit lock member during driving by the drive mechanism. .   2. The beverage extraction device according to claim 1, further comprising an extraction mechanism locking unit that locks the extraction mechanism in an inoperable state when the extraction unit is detached from the drive unit. The extraction mechanism has a driven gear that is rotationally driven by the drive mechanism in a state where the extraction unit is attached to the drive unit;
The extraction mechanism locking means is
A gear lock position that is provided in the extraction unit and locks the driven gear in a non-rotatable state by engaging between the gear teeth of the driven gear, and is released from the driven gear and unlocks the driven gear. A gear lock member movable between a gear lock release position,
A biasing means for biasing the gear lock member toward the gear lock position;
The gear lock release position is provided against the urging force of the urging means by engaging the gear lock member in a state provided in the drive unit and the extraction unit is attached to the drive unit. A gear lock releasing member to be held on,
The beverage extraction device according to claim 2, wherein

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