JPH0121426Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention relates to a coffee extraction device used in vending machines, etc. Unlike instant coffee, the invention involves pouring hot water into powdered coffee beans or tea. The extraction operation is carried out fully automatically, and this invention is particularly concerned with its lifting and lowering mechanism.

[Conventional technology]

Unexamined patent application published in 1984 as an extraction device for coffee etc.
There is one described in Publication No. 75122.

The device described in this publication had a mixing cup supported by a moving table that moved left and right, and after filling the cup with coffee powder, it was moved to the bottom of the cylinder, and then lowered together with the piston by the rotation of the upper cam. After the lower end of the cylinder and the upper end of the brewing cup are brought into close contact with the sealing ring, hot water is poured into the container, and then the piston inside the cylinder descends to pressurize the mixture of hot water and powder in the container and pour out the coffee liquid. After extraction through the filter, the piston and cylinder rise, the cup containing the squeezed waste and the filter move to the side, and after the filter stops, the cup moves further and is displaced upward by the pin and claw, and then downward. It suddenly falls and releases used coffee grounds.

The piston described above is fixed to a piston bridge that moves up and down along a guide rod, and the guide rod moves up and down together with a dispensing cylinder fixed thereto.

Further, the guide rod is attached to the frame so as to be movable up and down, and a spring is attached to the guide rod to push the piston bridge upward.

Then, by pressing down the cam follower installed in the center of the piston bridge with a large piston cam rotating above it, the piston bridge is lowered by compressing the spring, and the pressure on the follower by the piston cam is released. The piston bridge is raised by a spring.

The upper ends of the left and right guide rods are connected to both ends of a large cylinder operating bridge above the piston cam.

On the other hand, the moving table is moved to the left by a cable wound around a groove wheel that rotates in conjunction with the cam,
When the cable is unwound, the spring moves it to the right.

[Problem that the invention attempts to solve]

In the above conventional device, when the piston cam pushes down the central cam follower of the piston bridge fixed to the piston, the piston cam receives resistance from the spring, and when the movable table is moved to the left by the cable, the movement is also subjected to resistance from the spring.

In addition, there is a large piston cam at the top of the piston bridge, and on top of that there is a cylinder operating bridge that connects the upper ends of the left and right guide grooves, so the structure above the cylinder becomes large, making the entire device large. There is a problem with becoming.

The purpose of this invention is to provide a device in which the elevating frame can be moved up and down by a device provided below the cylinder, in order to solve the problems of the conventional device as described above.

[Means for solving problems]

In order to solve the above problems, this invention has a chamber that can be raised and lowered in a movable frame that moves between the lower part of the cylinder, the lower part of the powder supply pipe on the side, and the upper part of the squeezed waste discharge chute on the side. A filter block is provided at the bottom of the powder supply tube, and the moving frame moves to the bottom of the cylinder together with the chamber supplied with powder at the bottom of the powder supply pipe and stops, and when the cylinder, chamber, and filter block are connected, the inside of the chamber is removed from inside the cylinder. An endless chain configured to supply hot water to the movable frame and disposed over the movement range of the movable frame is provided, and the movable member is engaged with and disengaged from an engagement recess provided on a side surface of the sliding member that moves together with the movable frame. In an extraction device in which a drive piece for advancing and retracting is provided in a part of the endless chain, a swing-type push-up plate is provided below the cylinder to push up the filter block together with the chamber, and a swing-type push-up plate is provided below the push-up plate. An L-shaped push-up lever is provided that swings around a fulcrum at the bottom, and a roller that touches the bottom surface of the push-up plate is attached to the upper end of this push-up lever.When the push-up lever is in the raised position, the center of the roller is on the push-up lever. The push-up lever is configured to be located near a straight line connecting the fulcrum and the contact point of the push-up plate and the filter block, and the rear end of the portion of the push-up lever facing rearward from the fulcrum is connected to an elevating member so that the roller of the push-up lever The elevating member is configured to descend when the push-up plate is pushed up, and engaging protrusions that engage and disengage from the drive pieces of the endless chain are provided on the upper and lower portions of the elevating member, and further, the endless chain The driving piece is arranged in an inverted L shape so as to extend from the moving range of the moving frame to the lifting range of the lifting member, and the driving piece engages with and disengages from the upper and lower engagement protrusions of the lifting member to raise and lower the lifting member. This is what I decided to do.

[Effect]

Since this device has the above-mentioned configuration, the endless chain moves and slides when a certain amount of raw powder has been introduced into the chamber located at the bottom of the powder supply pipe and hot water has been supplied into the cylinder. The movable frame is moved together with the moving member, and the movable frame, together with the chamber and filter block, moves directly below the cylinder and stops.

When the moving frame moves directly below the cylinder as described above, the driving piece of the endless chain disengages from the engagement recess of the sliding member and begins to move downward together with the chain, so that the moving frame stops. As mentioned above, the drive piece disengages from the engagement recess of the sliding member and descends, engaging with the engagement protrusion at the bottom of the elevating member and lowering the elevating member, so the rear end of the push-up lever lowers and the push-up lever is lowered. The upper end of the lever begins to rotate upward around the fulcrum.

When the push-up lever begins to rotate as described above, the roller at its upper end contacts the bottom surface of the push-up plate and rotates the push-up plate upward, causing the top surface of the push-up plate to contact the bottom edge of the filter block. , push this filter block up with the chamber,
The upper end of the chamber presses against the lower part of the cylinder and rises, joining the filter block, chamber, and cylinder together. When the push-up lever is in the raised position in this manner, the center of the roller at the upper end of the push-up lever is in the vicinity of a straight line connecting the fulcrum of the push-up lever and the contact point between the push-up plate and the filter block.

In this state, compressed air pressure is applied to the cylinder, and hot water is supplied into the chamber by the air pressure applied to the hot water level inside the cylinder, and the components in the powder raw material in the chamber are extracted through the filter block.

As mentioned above, the endless chain is stopped during the extraction of the raw material components, but after a certain period of time, the endless chain starts running in the same direction again under the conditions that the extraction has finished, so the driving piece is moved along with the chain. It rises and engages with the engagement protrusion on the upper part of the elevating member, thereby raising the elevating member.

As a result, the push-up lever begins to rotate in the opposite direction, and the push-up plate is released from being pushed up by the roller at the upper end, so that the filter block and chamber descend and separate from the cylinder.

During this time, the chain continues to run, and the drive piece disengages from the engagement protrusion of the elevating member and begins to move into the engagement recess of the sliding member, so that the filter block and moving frame return to their original positions together with the sliding member.

〔Example〕

In the embodiment shown in the drawings, reference numeral 1 denotes a case, and a bottom plate 2 at the bottom thereof has a discharge port 3. Reference numeral 4 denotes a pair of guide rods fixed in the case 1. A vertically open movable frame 6 is slidably attached to the guide rods 4, and a pair of guide rods 7 are arranged below both guide rods 4 in parallel. However, both ends of the guide rod 7 are loosely fitted into vertical holes 8 provided in the end wall of the case 1 so as to be movable up and down. One of these vertically elongated holes 8, that is, the one on the right in FIG. The left and right guide rods 7 are spaced apart from each other.

Reference numeral 10 denotes a filter block, and notches 9 formed on the outer sides of projecting pieces downwardly provided on both sides of the filter block are engaged with the guide rod 7. Therefore, by lifting both guide rods 7 and placing one of the guide rods 7 into the notch 5 to widen the gap between the left and right guide rods 7, the notch 9 of the filter block 10 will come off from the guide rod 7, allowing easy removal. .

The filter block 10 is funnel-shaped and has an extraction port 11 at the bottom as shown in FIGS. 2 and 3.
A filter 12 is placed on the top.

A chamber 14 which is open at the top and bottom and has protruding shafts 13 on both outer sides of the upper end is loosely fitted into the moving frame 6.
A gasket is attached to the outer periphery of the upper end of the filter block 10, and the gasket is attached to the lower edge of the chamber 14, and a tension spring is stretched between the upper part of the chamber 14 and the lower part of the moving frame 6 as shown by the dotted line in FIG. The chamber 14 is pulled downward.

A downward spring piece 19 is fixed to the front end of the moving frame 6 as shown in FIG. A tension spring 20 is stretched between the ends and a scraper 15 is fixed to the head of the movable frame 6 as shown in FIG.

The scraper 15 moves together with the moving frame 6, and when the moving frame 6 moves further to the left leaving the filter block 10 at the position shown in FIG. Filter 1 by rubbing
2 Scrape off the top scraps.

16 in Figures 1, 2, 4, etc. is case 1.
A pair of support frames are fixed on both sides of the upper part near one end, and a cylinder 18 is provided between the vertical guide rods 17 fixed to the frames 16, and the two outward facing pieces on both sides of the cylinder 18 are guided. A valve port 21 is provided in the center of the bottom plate of the cylinder 18, which is slidably engaged with the rod 17. Reference numeral 22 denotes a lower valve body that closes the valve port 21 from below, and the valve port 21 is closed by a linear spring 24 inserted into a horizontal hole of the upper valve stem.

A gasket is provided at the lower end of the annular wall 26 on the lower surface of the bottom plate of the cylinder 18 to tightly contact the upper end of the chamber 14, and the guide rod 17 is provided with a spring 27 for pushing down the cylinder 18.

30 is fixed to the support frame 16 and the cylinder 1
The cylinder head 8 is a cylinder head that is slidably fitted into the upper opening of the cylinder 18, and a gasket 31 that tightly contacts the inner peripheral surface of the cylinder 18 is attached to the outer periphery of the cylinder head. A hole 29 is provided. The upper valve element 32 is supported by a spring, and when the cylinder 18 rises, the cylindrical part at the bottom pushes down the upper valve element 32 via the spring, closing the hot water supply port 28 and the air vent hole 29. The head 30 is further provided with a compressed air port 38 leading to a source of compressed air.

A lifting lever 33 for lifting the protruding shaft 13 of the chamber 14 is swingably attached to both side walls of the case 1 by a shaft 34, and a spring 35 is provided to hold the lever 33 diagonally downward.

43 is a push-up plate for the filter block 10, and the shaft 41
It is swingably attached to a support piece provided on the side wall 40 of the case 1, enters the case 1 through an opening in the side wall, and is located directly below the cylinder 18 as shown in FIG.

A push-up lever 44 at the lower part of the push-up plate 43 is swingably mounted in the case 1 by a shaft 45, and a roller 46 that contacts the lower surface of the push-up plate 43 is attached to the front end of this lever 44.

Reference numeral 47 in FIG. 2 indicates an elevating member which is attached to a vertical guide hole 65 provided in the side wall 40 of the case 1 so as to be able to rise and fall as shown in FIG. It is engaged with a pin 49 at the rear end of.

As shown in FIG. 5, a sliding member 58 as shown in FIG. 2 and FIGS.
An engagement piece 69 provided on the inside of the case 1 is engaged with an engagement notch 68 on the outer lower part of the moving frame 6 so as to move together. Driven by

5 to 7 show details of the driving means 51, including upper and lower sprockets 52 disposed above and in the middle of the vertical guide hole 65.
Then, the sprocket 52' provided near the end of the lateral guide hole 66 is engaged with the sprocket 67 on the side of the upper end of the guide hole 65 to move from the movement range of the sliding member 58 to the movement range of the elevating member 47. A drive piece 54 consisting of a plurality of pins is provided on an endless chain 53 arranged in an inverted L-shape along the vertical axis.
Each member 47, 58 is moved by engaging with the engagement recess 57 of the sliding member 58.

In FIG. 1, numeral 59 is a supply device for powder of ground coffee beans, 60 is a supply pipe for the powder, and 61 is a squeezing waste discharge chute.

In the above configuration, FIG. 1 shows a position where a fixed amount of raw material powder is supplied to the chamber 14, and at this time the valve port 21 of the cylinder 18 is closed and the hot water supply port 2 is closed.
Hot water is supplied into the cylinder 18 from 8.

In this state, a fixed amount of powder is put into the chamber 14, the chain 53 is started, and the drive piece 54 is moved to the fifth
As shown in FIGS. 6A and 6B, the movable frame 6 engages with the recess 57 of the sliding member 58, and moves together with the chamber 14 and the filter block 10 directly below the cylinder 18 as shown in FIG. The drive piece 54 continues to move together with the chain 53, but the chain 53 moves downward. Accordingly, the drive piece 54 comes out of the recess 57 and moves downward, and the moving frame 6 stops directly below the cylinder 18. The drive piece 54 that has descended together with the chain 53 engages with the protrusion 56 at the bottom of the lifting member 47 and pushes down the lifting member 47 as shown by the chain line in FIG.
Press 9 down.

Therefore, the roller 46 of the lever 44
3, and the shaft 42 moves to the push-up plate 43 as shown in FIG.
Since it hits stopper 50, filter block 1
0 together with the chamber 14 and its upper end,
It is pressed against the gasket at the bottom of the cylinder 18, and the cylinder 18 is also pushed up.

When the cylinder 18 rises, the upper valve body 32 rises via the spring, closing the hot water supply port 28 and the air vent hole 29.

In the above state, as shown in FIG. 4, the lifting member 47 is lowered and the roller 46 of the push-up lever 44 is pushing up the push-up plate 43. At this time, the center of the shaft 45, which is the fulcrum of the push-up lever 44, and the push-up plate 43 are aligned. With respect to the straight line L connecting the contact points of the filter block 10, the roller 46
The center of the shaft 42 is on the elevating member 47 side, and the shaft 42 is in contact with the stopper 50.

Under the above conditions, a solenoid valve of a compressed air supply source (not shown) opens, and compressed air is supplied into the cylinder 18 from the compressed air port 38. Therefore, air pressure is applied to the hot water level in the cylinder 18, and this pressure pushes open the lower valve body 22, and hot water is injected into the chamber 14 from the valve port 21 as shown in FIG. The liquid that has passed through the powder and extracted components such as coffee passes through the filter 12 and is sent out from the extraction port 11 of the filter block 10 via the supply pipe 23.

During this time, the chain 53 is stopped, but after a certain period of time, the pressure from the compression port 38 stops.
Under the condition that the extraction is completed, the chain 53 starts running in the same direction again.

For this reason, the drive piece 54 comes off the protrusion 56 and begins to rise, and in the middle of this movement, the drive piece 54 moves to the upper protrusion 56.
, and raises the elevating member 47. Therefore, the pin 49 engaged with the notch 48 of the elevating member 47 is pushed up, the lever 44 is rotated, the roller 46 is lowered, and the push-up plate 43 is also lowered, so that the cylinder 1
8, chamber 14, filter block 10 is the second
Return to the original position in the diagram.

During this time, the chain 53 continues to run, and the sliding member 58
This sliding member 5 engages with the lower part of the recess 57 again.
When the movable frame 6 begins to return to its original position via the guide rod 8 and reaches the position shown in FIG. However, since the chain 53 continues to travel, the movable frame 6 moves further to the right in FIG. 1 together with the chamber 14, but at this time the spring 20 is stretched.

When the movable frame 6 moves as described above, the scraper 15 at its end scrapes off the squeezed residue on the filter 12 and drops it into the chute 61. Further, the protruding shafts 13 on both sides of the chamber 14 that move together with the moving frame 6 are placed on the lifting lever 33 and rise, and when they pass this lever 33, they fall from the end of the lever 33 by the tension spring and their own weight. In that shot,
The remaining debris adhering to the inner surface of the chamber 14 is dropped into the chute 61.

Thereafter, the movable frame 6 returns to the position shown in FIG. 14 is located on block 10, and chain 53 is stopped.

Note that each condition for each of the above actions is set using a position detector such as a limit switch, a timer, or the like.

[Effect of idea]

As mentioned above, this device is equipped with a swinging push-up plate below the cylinder of the extractor, and below this push-up plate is provided an L-shaped push-up lever that swings around a fulcrum at the bottom. A roller that contacts the lower surface of the push-up plate is attached to the upper end, and when the push-up lever is in the raised position, the center of the roller at the upper end is located near the straight line connecting the fulcrum of the push-up lever and the point of contact between the push-up plate and the filter block. Because of this structure, even if a downward load is applied to the filter block due to pressurization of compressed air into the cylinder, the force for rotating the push-up lever is extremely small. Therefore, there is no risk of the filter block being pushed down, and
The force for reversing the push-up lever may also be small.

Further, in this invention, the rear end of the portion of the push-up lever facing rearward from the fulcrum is connected to an elevating member, and when the roller of the push-up lever pushes up the push-up plate, the elevating member descends. The endless chain for moving the moving frame is made into an inverted L-shape, and extends over the lifting range of the lifting member, and the lifting member is raised and lowered by a drive piece provided on the endless chain, and the filter block is moved through the push-up lever and the push-up plate. Since the filter block and chamber are raised and lowered, all mechanisms for driving the filter block and chamber are located below the cylinder. Therefore, the drive mechanism can be made extremely compact.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal front view of the extraction device implementing this invention, Fig. 2 is an enlarged longitudinal sectional side view of the same, and Fig. 3 is an enlarged longitudinal sectional side view of the same.
The figure is an enlarged longitudinal sectional front view of the main parts, Fig. 4 is an enlarged longitudinal sectional side view of the same as above, Fig. 5 is a partially cutaway enlarged front view showing details of the drive means, and Fig. 6 shows the engaged state of the drive chain. The rear view and FIG. 7 are enlarged longitudinal sectional side views showing the engaged state of the moving frame and the sliding member. 6...Moving frame, 10...Filter block, 1
4...Chamber, 18...Cylinder, 41,4
2, 45... shaft, 43... push-up plate, 44... push-up lever, 46... roller.

Claims (1)

[Scope of utility model registration request] A movable frame that moves between the lower part of the cylinder, the lower part of the powder supply pipe on its side, and the upper part of the squeezed waste discharge chute on its side is provided with a chamber that can be raised and lowered and a filter block at its lower part. The movable frame moves to the bottom of the cylinder together with the chamber supplied with powder at the bottom and stops, and hot water is supplied from inside the cylinder into the chamber under the condition that the cylinder, chamber, and filter block are combined, and the above-mentioned movement An endless chain is provided that extends over the moving range of the frame, and a drive piece that engages and disengages from an engagement recess provided on the side surface of the sliding member that moves together with the moving frame to move the moving member forward and backward is provided in the endless chain. In the extraction device installed in a part of the cylinder, a swinging type push-up plate is installed below the cylinder to push up the filter block together with the chamber, and below this push-up plate is an L-shaped push-up plate that swings around the lower fulcrum. A push-up lever is provided, and a roller that contacts the lower surface of the push-up plate is attached to the upper end of the push-up lever. When the push-up lever is in the raised position, the center of the roller touches the fulcrum of the push-up lever and the contact point between the push-up plate and the filter block. The rear end of the portion of the push-up lever facing rearward from the fulcrum is connected to the lifting member, so that when the roller of the push-up lever pushes up the push-up plate, the lifting member descends. Engagement protrusions that engage and disengage the drive piece of the endless chain are provided on the upper and lower sides of the elevating member, and further, the endless chain extends from the moving range of the moving frame to the elevating range of the elevating member. An elevating mechanism in an extraction device, wherein the elevating mechanism is arranged in an inverted L-shape so as to extend over the elevating member, and the driving piece engages and disengages from upper and lower engaging protrusions of the elevating member to perform the action of elevating the elevating member.