Abstract:
An object of the invention is to provide a table for supplying liquid for drinking which can accurately measure an amount of discharging liquid for drinking. The invention provides a table for supplying liquid for drinking provided with a table, a liquid discharging server installed in the table, and a liquid storage tank supplying liquid for drinking to the liquid discharging server, in which a measuring mechanism for measuring the discharging liquid amount is provided, and the measuring mechanism has a function of measuring only in a state in which a forward liquid passage reaching the liquid discharging server is filled with the liquid for drinking. In accordance with the table for supplying liquid for drinking of the invention, since the customer can discharge the liquid for drinking to the container on the spot by himself or herself, no waiting time is generated and a required amount of liquid can be injected so as to obtain an economical effect. On the other hand, it is possible to reduce the shop tenders for responding to the orders of the customers, in the shop side, the burden of the labor cost is reduced, and the customer can recognize the results obtained by measuring the discharged amount so as to prevent the trouble on money. On the basis of the measuring mechanism, it is possible to securely avoid the erroneous measurement of the liquid for drinking as in the conventional structure, and it is possible to accurately measure.

Description:
TECHNICAL FIELD  
       [0001]     The present invention relates to a table for supplying liquid for drinking for supplying liquid for drinking such as beer or the like, and more particularly to a table for supplying liquid for drinking by which a customer can meter and discharge a necessary amount on the basis of his or her own operation.  
       BACKGROUND ART  
       [0002]     A conventional dispenser for supplying the liquid for drinking is placed together with a carbon dioxide bottle or a barrel filled with the liquid for drinking, in the other place than customer&#39;s seats, for example, a kitchen or the like.  
         [0003]     In the case that a shop tender receives an order form the customer in the seat, the shop tender walks to the place where the dispenser is placed, injects an ordered number of liquid for drinking to containers (steins or the like) via the dispenser, and carries the containers to the customer&#39;s seat.  
         [0004]     When receiving an additional order from the customer, the shop tender temporarily returns to the place of the dispenser while holding the empty container, injects the liquid for drinking to a new stein after being washed at the place, and carries to the customer&#39;s seat again.  
         [0005]     In particular, in the case that the orders of the customers are concentrated at the same time, a plurality of shop tenders have the dispenser in common, so that it is necessary that the shop tenders wait for the dispenser and it is hard to rapidly respond the order.  
         [0006]     On the other hand, the customer drinks the liquid for drinking which is delivered at a fixed time after the customer calls and places an order, and can not drink immediately when the customer wants to drink due to a waiting time.  
         [0007]     Further, there is a case that the customer wants to order about half amount of the liquid for drinking in the container, however, in normal, since the customer can only order a prescribed amount of injected liquid for drinking, the customer leaves the liquid for drinking, and it is wasteful and uneconomic for the customer.  
         [0008]     On the contrary, the customer holds back an order, and the shop can not get turnover.  
         [0009]     On the other hand, for the shop, it is necessary to arrange a lot of shop tenders in order to rapidly respond to the orders of the customers, burden of labor cost is large for the shop.  
         [0010]     Further, when settling the drinking money, there is a case that a money trouble is generated between the customer and the shop side with regard to the cost demand because the customer has a small recognition about the drinking amount.  
         [0011]     In order to solve the problem mentioned above, there has been developed a table in which a draft tower is placed as disclosed in Japanese Unexamined Utility Model Publication No. 4-115199.  
         [0012]     In accordance with this invention, the draft tower for discharging beer is placed in a customer&#39;s seat table, and a discharge amount from the draft tower is measured so as to be displayed in integrating meters provided in both of positions near the customer&#39;s seat and a cash resister of the shop.  
         [0013]     Accordingly, it is not necessary to order the shop tender at a time of placing an order for the liquid for drinking, and the customer can immediately discharge a necessary amount of liquid for drinking at a time when the customer wants to drink.  
         [0014]     Further, the customer can not only enjoy an operation of discharging the liquid for drinking, but also have the liquid for drinking while confirming the discharge amount (drinking cost) by himself or herself. Accordingly, the customer has the sense of security. Further, since the customer can confirm the drinking amount by himself or herself, it is possible to prevent the trouble on money.  
         [0015]     Further, for the shop side, it is not necessary to prepare the new washed containers, it is unnecessary to arrange the shop tenders, and the cost is extremely efficient.  
         [0016]     However, for a flow meter in the conventional draft tower, a so-called axial flow type flow meter in which an axis of impeller is set in parallel to a flow is employed because a principle and a structure are simple and a cost is advantageous.  
         [0017]     In other words, the flow meter utilizes the matter that the impeller rotates at a speed in proportional to a flow speed of the fluid obtained by arranging the axis of the impeller in parallel to the fluid flowing within a flow passage, and determines the flow rate by detecting a rotational speed.  
         [0018]     However, in the conventional flow meter mentioned above, since the flow meter utilizes a physical rotation caused by the impeller, there is a problem that in the case that the flow meter measures the liquid for drinking containing the carbon dioxide gas such as the beer or the like, the impeller is rotated in the same manner even at a time when the liquid-cut state is formed and the flow passage is in a bubble or gas state, and the flow meter erroneously counts.  
         [0019]     In the draft tower placed in the table of the customer&#39;s seat, since the charge is left up to the customer, it is necessary to extremely accurately measure the injection amount of the liquid for drinking.  
         [0020]     In the case that the liquid amount is counted and the liquid for drinking is not actually injected although the customer injects, a confidence of the shop is deteriorated.  
         [0021]     On the basis of the matter mentioned above, there has been desired a draft tower which can accurately count a liquid amount of the liquid for drinking.  
       SUMMARY OF THE INVENTION  
       [0022]     The present invention is made for the purpose of achieving the problem mentioned above on the basis of the actual condition mentioned above.  
         [0023]     In other words, an object of the present invention is to provide a table for supplying liquid for drinking which can accurately measure an amount of discharging liquid for drinking.  
         [0024]     Accordingly, the inventor of the present invention has found that an erroneous measurement of liquid for drinking can be avoided by adding a so-called sensor for detecting whether or not the liquid exists to an impeller in a liquid passage of a measuring mechanism, as a result of devoting himself to research the problem mentioned above, and completes the present invention on the basis of the knowledge.  
         [0025]     In other words, in accordance with the present invention, there is provided (1) a table for supplying liquid for drinking provided with a table, a liquid discharging server installed in the table, and a liquid storage tank supplying liquid for drinking to the liquid discharging server, comprising: 
        a measuring mechanism for measuring the discharging liquid amount,     wherein the measuring mechanism has a function of measuring only in a state in which a forward liquid passage reaching the liquid discharging server is filled with the liquid for drinking.        
 
         [0028]     Further, in accordance with the present invention, there is provided (2) a table for supplying liquid for drinking provided with a table, a liquid discharging server installed in the table, and a liquid storage tank supplying liquid for drinking to the liquid discharging server, 
        wherein a measuring mechanism for measuring the discharging liquid amount is provided between the liquid discharging server and the liquid storage tank, the measuring mechanism is provided with an impeller rotated by the liquid for drinking flowing through a liquid passage within a housing, an impeller rotation detecting portion for detecting the rotation of the impeller, and a liquid detecting portion for detecting whether or not the liquid passage is filled with the liquid for drinking, and a pulse signal measuring the liquid amount is detected by an impeller rotation signal output from the impeller rotation detecting portion and a liquid fullness signal output from the liquid detecting portion.        
 
         [0030]     Further, there is provided (3) a table for supplying liquid for drinking as described in the item (1) mentioned above, wherein a cooling mechanism for cooling the liquid for drinking is provided between the liquid storage tank and the liquid discharging server.  
         [0031]     Further, there is provided (4) a table for supplying liquid for drinking as described in the item (3) mentioned above, wherein the cooling mechanism is provided with a ice receiving container and a cooling plate and is structured such as to cool the liquid for drinking by circulating the liquid for drinking through the cooling plate.  
         [0032]     Further, there is provided (5) a table for supplying liquid for drinking as described in the item (1) mentioned above, wherein the liquid storage tank is received in a lower side of the table.  
         [0033]     Further, there is provided (6) a table for supplying liquid for drinking as described in the item (1) mentioned above, wherein the liquid storage tank is provided with a caster and is structured so as to be movable.  
         [0034]     Further, there is provided (7) a table for supplying liquid for drinking as described in the item (1) mentioned above, wherein a display portion detecting and displaying the liquid amount measured by the measuring mechanism is provided in a counter which is apart from the table.  
         [0035]     Further, there is provided (8) a table for supplying liquid for drinking as described in the item (1) mentioned above, wherein a plurality of liquid discharging servers are placed in the table.  
         [0036]     Further, there is provided (9) a table for supplying liquid for drinking as described in the item (8) mentioned above, wherein a communication pipe  10   b  for feeding the liquid for drinking to the liquid discharging server is provided with a check valve allowing the liquid for drinking to fluidize only in one direction corresponding to a discharging direction.  
         [0037]     Further, there is provided (10) a table for supplying liquid for drinking as described in the item (1) mentioned above, wherein a cooling mechanism for cooling the liquid for drinking and a refrigerating mechanism for cooling the liquid for drinking to a minus temperature are provided between the liquid storage tank and the liquid discharging server.  
         [0038]     The present invention can, of course, employ a structure obtained by combining two or more selected from the items 1 to 10 mentioned above as far as it is along the object of the present invention.  
         [0039]     As described above, in accordance with the table for supplying liquid for drinking of the present invention, since the customer can discharge the liquid for drinking to the container on the spot by himself or herself, no waiting time is generated and a required amount of liquid can be injected so as to obtain an economical effect.  
         [0040]     On the other hand, it is possible to reduce the shop tenders for responding to the orders of the customers, in the shop side, the burden of the labor cost is reduced, and the customer can recognize the results obtained by measuring the discharged amount so as to prevent the trouble on money.  
         [0041]     Since the structure is provided with the measuring mechanism for measuring the discharged liquid amount, and is provided with the impeller rotation detecting portion for detecting the rotation of the impeller and the liquid detecting portion for detecting whether or not the liquid passage is filled with the liquid for drinking, the measuring operation can be carried out only in a state in which the liquid is filled, it is possible to securely avoid the erroneous measurement of the liquid for drinking as in the conventional structure, and it is possible to accurately measure. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0042]      FIG. 1  is a schematic view schematically showing a table for supplying liquid for drinking;  
         [0043]      FIG. 2  is a cross sectional view of a liquid-cut detecting sensor constituting a liquid-cut detecting mechanism;  
         [0044]      FIGS. 3A and 3B  are views schematically showing a measuring mechanism, in which  FIG. 3A  is a partly broken perspective view, and  FIG. 3B  is a perspective view showing an arrangement of a magnetic body provided in an impeller;  
         [0045]      FIG. 4  is a block diagram showing a structure of a rotational pulse generating portion;  
         [0046]      FIG. 5  is a timing chart diagram showing a timing of a pulse signal generation in the measuring mechanism on the basis of a relation between a liquid fullness signal and an impeller rotation signal;  
         [0047]      FIGS. 6A and 6B  are schematic views showing an arrangement of a cooling mechanism, a liquid discharging server and a sub set, in which  FIG. 6A  is a side elevational view and  FIG. 6B  is a top elevational view;  
         [0048]      FIG. 7  is a view showing a setting position of a check valve in a drinking table having a plurality of liquid discharging servers;  
         [0049]      FIG. 8  is a schematic view showing a cooling mechanism and a refrigerating mechanism; and  
         [0050]      FIG. 9  is a schematic view showing another modified embodiment of the measuring mechanism. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0051]     A description will be given below of embodiments in accordance with the present invention with reference to the accompanying drawings.  
         [0052]      FIG. 1  is a schematic view schematically showing a table for supplying liquid for drinking provided with a liquid discharging server  2  in accordance with an embodiment of the present invention.  
         [0053]     The present table for supplying liquid for drinking is provided with a table  1 , a liquid discharging server  2  installed in the table  1 , a cooling mechanism  3  for supplying cooled liquid for drinking (for example, beer), and a liquid storage tank  4  for supplying the liquid for drinking to the cooling mechanism  3 .  
         [0054]     Further, the table for supplying liquid for drinking  1  is provided with a measuring mechanism  5  for measuring an amount of the liquid discharged through the liquid discharging server  2 , between the liquid discharging server  2  and the liquid storage tank  4 , in other words, in a forward liquid passage reaching the liquid discharging server.  
         [0055]     The liquid amount (that is, the discharged liquid amount) of the liquid for drinking measured by the measuring mechanism  5  can be displayed on a display portion of a digital box  6  provided in a counter (not shown) which is apart from the table  1 .  
         [0056]     An amount of money can be, of course, displayed by converting the discharged liquid amount into an amount of money.  
         [0057]     Further, the table  1  is provided with a sub set  7  for displaying a flow rate value on the basis of a pulse signal output from the digital box  6 .  
         [0058]     Further, a liquid-cut detecting mechanism  13  is provided for detecting a liquid-cut of the liquid for drinking.  
         [0059]     The liquid storage tank  4  is received in a lower side of the table  1  as shown in  FIG. 1 , and a gas cylinder  8  supplying a pressurized carbon dioxide gas for discharging the liquid for drinking, for example, the beer or the like is connected thereto by a communication pipe  10   a  via a pressure reducing valve  9 .  
         [0060]     Further, the liquid storage tank  4  is connected to the measuring mechanism  5  by a communication pipe  10   b  via a liquid-cut detecting sensor  11  attached to the liquid-cut detecting mechanism  13 , and the measuring mechanism  5  is connected to the cooling mechanism  3  provided in the table  1  through the communication pipe  10   b.    
         [0061]     Further, the liquid storage tank  4  is provided with casters  12 , can freely move by detaching the communication pipes  10   a  and  10   b  connecting between the liquid-cut detecting sensor  11  and the pressure reducing valve  9  in the case that the liquid in the liquid storage tank  4  runs short, and can be replaced by a new one.  
         [0062]     The liquid-cut detecting sensor  11  is provided with two electrodes which are placed within a tubular housing, as shown in  FIG. 2 , and each of the electrodes is arranged in a state of being apart from each other.  
         [0063]     In other words, the liquid-cut detecting sensor  11  is provided with conductive connection pipes  15  and  15  serving as the electrodes in both ends of a nonconductive tube  14 , and each of the electrodes is connected to the liquid-cut detecting mechanism  13  through a wiring  17 .  
         [0064]     Further, the liquid-cut detecting mechanism  13  has a function of measuring a current flowing therethrough by applying a predetermined voltage between the electrodes via the wiring  17 .  
         [0065]     In other words, the current flows by setting the liquid for drinking filled within the housing  16  to an electric load, on the basis of the voltage applied between the conductive connection pipes  15  and  15 , and the liquid-cut detecting mechanism  13  can detect whether or not the liquid passage within the housing  16  is filled with the liquid for drinking, on the basis of the measured current value.  
         [0066]     In other words, when the liquid for drinking is filled within the housing  16 , the current flows on the basis of a short circuit between the electrodes due to the conductive property of the liquid for drinking.  
         [0067]     However, in the case that the liquid for drinking is not filled within the housing  16 , that is, the conductive liquid for drinking is not filled between the electrodes, the current is hard to flow.  
         [0068]     Accordingly, the liquid-cut detecting mechanism  13  can detect whether or not the liquid for drinking is filled within the housing  16 , by measuring the current between the electrodes.  
         [0069]     In this case, it is possible to determine whether or not the liquid for drinking is filled, by selecting the standard current value.  
         [0070]     In the case that the liquid-cut (the state in which the liquid is not filled) is detected, the liquid-cut detecting mechanism  13  outputs a liquid-cut signal for controlling a lighting of a liquid-cut lamp provided in the digital box  6  through a wiring  33 .  
         [0071]     Further, the liquid-cut signal can be structured such as to sound a warning buzzer provided in the digital box  6 .  
         [0072]     In this case, a sufficient interval is provided between the electrodes of the liquid-cut detecting sensor so as to prevent the electrodes are short circuited by the remaining liquid of the liquid for drinking in a state in which the liquid for drinking is not filled.  
         [0073]     Further, the remaining liquid may be prevented from being generated possibly, by applying a water repellant treatment to an inner side of the housing  16 .  
         [0074]     Next, a description will be given of the measuring mechanism  5 .  
         [0075]     The measuring mechanism  5  is provided with an impeller rotated by the liquid for drinking flowing through the liquid passage in the inner surface of the housing  16 , and the liquid amount of the discharged liquid for drinking can be measured by the rotational speed of the impeller.  
         [0076]     The measuring mechanism is schematically shown in  FIG. 3A .  
         [0077]     As illustrated, the measuring mechanism  5  is provided with a nonconductive tubular housing  18 , an impeller  19 , a pickup coil  20 , conductive connection pipes  21  and  21  and a rotational pulse generating portion  22 .  
         [0078]     The impeller  19  is placed such that an axis thereof is in parallel to a direction A in which the liquid for drinking within the tubular housing  18  flows.  
         [0079]     Further, the impeller  19  is arranged so as to be rotatable by a bearing  23  supported to a center position within the housing  18 .  
         [0080]     Further, in accordance with the embodiment, as shown in  FIG. 3B , a magnetic body  26  is mounted to an outer end portion of a blade  25  of the impeller  19  in accordance with an embedding or the like.  
         [0081]     In this embodiment, twelve blades  25  are provided in the impeller  19 , however, four magnetic bodies  26  mounted so as to jump over two blades  25  (at a unit of 90 degree).  
         [0082]     On the other hand, the pickup coil  20  is provided at a housing position in correspondence to an outer peripheral side of the impeller  19 , and is arranged so as to detect a rotating magnetic field on the basis of the rotation of the impeller  19 .  
         [0083]     In other words, the pickup coil  20  is structured such that a periodically changing peak signal is generated by setting a time point when the magnetic body  26  of the impeller  19  comes closest to the pickup coil  20  to a peak.  
         [0084]     Further, the conductive connection pipes  21  and  21  serving as two electrodes for detecting whether or not the liquid for drinking exists are provided at positions opposing to each other within the housing  18 .  
         [0085]     The conductive connection pipes  21  and  21  have a function serving as a liquid detecting sensor for detecting whether or not the liquid for drinking is filled within the housing  18 .  
         [0086]     The liquid detecting sensor has a similar liquid detecting principle to a principle obtained by the conductive connection pipes  15  and  15  of the liquid-cut detecting sensor  11  mentioned above.  
         [0087]     The rotational pulse generating portion  22  is provided with an impeller rotation detecting portion D 1 , a liquid detecting portion D 2  and a logic multiplication portion G (refer to  FIG. 4 ).  
         [0088]     An analogue peak signal generated by the pickup coil  20  is input to the impeller rotation detecting portion D 1  through a wiring  27 .  
         [0089]     Further, the peak signal is converted into an impeller rotation signal corresponding to a digital rectangular signal by a converting circuit (not shown).  
         [0090]     The liquid detecting portion D 2  is provided with a function of applying a voltage to two conductive connection pipes  21  and  21  via a wiring  28  and a function of measuring the current flowing in correspondence to the applied voltage.  
         [0091]     The measured current value is converted into a liquid fullness signal showing whether or not the liquid for drinking is filled, via a converting circuit for converting into a digital signal of high or low on the basis of a predetermined value.  
         [0092]     Further, the rotational pulse generating portion  22  has a function of controlling a pulse signal generation on the basis of the impeller rotation signal detected by the impeller rotation detecting portion D 1  and the liquid fullness signal detected by the liquid detecting portion D 2 .  
         [0093]     In other words, the rotational pulse generating portion  22  inhibits the pulse signal from being generated, by inputting the impeller rotation signal and the liquid fullness signal to the logic multiplication portion G.  
         [0094]     For example, the logic multiplication portion G structures two inputs and one output, and is operated such that the output becomes in the high state only in the case that two inputs are simultaneously in the high state.  
         [0095]     Next, a description will be given of an operation of the measuring mechanism  5  by using a timing chart shown in  FIG. 5 .  
         [0096]     The impeller rotation signal is generally generated by the rotation of the impeller  19  caused by the flowing of the liquid for drinking filled within the housing  18 .  
         [0097]     On the other hand, the liquid fullness signal is appears as the high state as shown in a period T 1  on the basis of the filling of the liquid for drinking within the housing  18 .  
         [0098]     In the case that the liquid for drinking is filled within the housing, the liquid fullness signal becomes in the high state as shown in the period T 1  in  FIG. 5A , and the impeller rotation signal becomes the rectangular signal as shown in the drawing.  
         [0099]     Accordingly, the rotational pulse generating portion  22  generates the pulse signal which is synchronized with the impeller rotation signal because the liquid fullness signal is the high state.  
         [0100]     However, since the liquid for drinking is not filled within the housing  18  in the case that the liquid for drinking of the liquid storage tank  4  runs short, there is established a state in which the bubbles of the liquid for drinking or the compressed gas (from the gas cylinder) flows.  
         [0101]     In this case, the impeller  19  is rotated as shown in a period T 2  in  FIG. 5B  in spite that the liquid for drinking is not filled.  
         [0102]     Further, since there is established the state in which the liquid for drinking is not filled, that is, the state in which the bubbles of the liquid for drinking or the compressed gas flows, the liquid fullness signal appears as the low state as shown in the drawing.  
         [0103]     In this case, the rotational pulse generating portion  22  inhibits the pulse signal from being generated, on the basis of the liquid-cut low-state liquid fullness signal from the liquid detecting portion D 2 .  
         [0104]     In other words, the rotational pulse generating portion  22  can generate the pulse signal only in the case that the liquid for drinking is filled within the housing so as to flow. As a result, it is possible to accurately measure the flow rate of the liquid for drinking.  
         [0105]     As mentioned above, the measuring mechanism in accordance with the present invention has a function of measuring the liquid amount only in the state in which the liquid for drinking is filled, by the rotational pulse generating portion  22 , and it is possible to securely avoid the conventional erroneous measuring.  
         [0106]     In this case, the pulse signal can renew the flow rate display value of the digital box  6  through a wiring  29 .  
         [0107]     In this case, a reliability of the measuring mechanism  5  can be further improved by duplexing the liquid-cut detecting mechanism  13  and the liquid detecting portion D 2  provided in the measuring mechanism  5 .  
         [0108]     In other words, in the case that the flow rate display value is renewed at a time when the liquid-cut lamp of the liquid-cut detecting mechanism  13  is turned on, the shop tender monitoring the digital box  6  can determine that the liquid detecting portion D 2  is out of order.  
         [0109]     In this case, the discharging operation of the liquid for drinking is thereafter carried out on the basis of the liquid-cut lamp in the meantime.  
         [0110]     On the contrary, in the case that the liquid-cut lamp is not turned on in spite that the flow rate display value is not renewed, it is possible to determine the liquid-cut detecting mechanism  13  is out of order.  
         [0111]     In this case, there is a case that the discharging operation is not thereafter carried out, however, the discharging operation of the liquid for drinking is carried out by believing the liquid detecting portion D 2  without depending upon the liquid-cut lamp.  
         [0112]     In this case, the liquid for drinking flows into the cooling mechanism  3  through the communication pipe after being measured by the measuring mechanism  5 .  
         [0113]     The cooling mechanism  3  is structured such as to cool the liquid for drinking discharged from the liquid discharging server  2  via the communication pipe from the liquid storage tank  4  to a proper temperature before the liquid discharging server  2 .  
         [0114]     As shown in  FIG. 6 , the cooling mechanism  3  is generally provided with an ice receiving container  30  holding ice, and a cooling plate  31  arranged in the ice receiving container  30 .  
         [0115]     A corrugated tube connected to a communication pipe is housed in the cooling plate  31 , and is cooled by being brought into contact with the ice (not shown) or the water containing the ice.  
         [0116]     The ice receiving container  30  is provided with a lid  32  for putting the ice therein, and it is preferable that the lid is flush to the top surface of the table and is transparent.  
         [0117]     In other words, an inner side of the ice receiving container  30  can be easily observed visually through the lid, and the ice supplying period can be appropriately recognized.  
         [0118]     The liquid for drinking can be cooled rapidly to a properly chilled temperature by being circulated within the cooled cooling plate  31 .  
         [0119]     Further, a drain tank (not shown) for discharging the meltwater is prepared in the ice receiving container  30 .  
         [0120]     The liquid discharging server  2  is installed on the top surface of the table  1 , and is structured such as to discharge the liquid for drinking cooled to an optimum temperature via the cooling mechanism  3  in accordance with an opening and closing operation.  
         [0121]     Accordingly, the customer can discharge a desired amount of liquid for drinking by freely operating the liquid discharging server  2  at a time when the customer wants to have the liquid for drinking, and an accurate measuring can be secured by the measuring mechanism  5 .  
         [0122]     The sub set  7  for displaying the drinking amount or the drinking cost is placed on the top surface of the table  1  in a state in which the display portion is directed to an upper side, and the count value of the pulse is displayed on the display portion on the basis of the pulse signal from the digital box  6 .  
         [0123]     Further, the structure is made such that the display value is counted up at a time when the pulse number of the pulse signal reaches a preset value.  
         [0124]     Further, the reset signal from the digital box  6  serves so as to reset the display value of the sub set  7  to zero.  
         [0125]     As mentioned above, the sub set  7  can be provided with a money displaying function, a flow rate displaying function, a count-up unit setting function, a set value holding function (a function of holding the set value in a nonvolatile memory even if the power source is turned off) and the like, on the basis of the above basic function.  
         [0126]     [Other Embodiments] 
         [0127]     The liquid discharging server  2  placed on the top surface of the table  1  is normally constituted by one liquid discharging server.  
         [0128]     However, in the case that the table  1  is large sized, it is preferable that two or more servers are placed because the number of people sitting around the table is increased.  
         [0129]     In the case that a plurality of liquid discharging servers  2  are placed in the table  1  as mentioned above, an impact is transmitted to the other liquid discharging server at a time of stopping the discharge of the liquid for drinking in one liquid discharging server  2 .  
         [0130]     In other words, when the flow of the liquid for drinking is suddenly stopped by the liquid discharging server  2 , a pressure is applied to the other liquid discharging server  2 , and a shock (a hammer shock) is generated.  
         [0131]     Accordingly, in the table  1  in which a plurality of liquid discharging servers  2  are placed, it is important that the communication pipe  10   b  is necessarily provided with a check valve V by which the liquid can fluidize only in one direction corresponding to the discharging direction.  
         [0132]      FIG. 7  is a view showing a position where the check valve is placed in the drinking table having a plurality of liquid discharging servers  2 .  
         [0133]     The check valve V is mounted to the communication pipe  10   b  near the liquid storage tank  4 .  
         [0134]     [Other Embodiment] 
         [0135]     There is a case that it is preferable to further lower the temperature of the liquid for drinking discharged from the liquid discharging server.  
         [0136]     For example, in the case that the liquid for drinking is the beer, the beer having a distinctive taste with an increased pungent taste is provided by setting the temperature to −3 to −2° C.  
         [0137]     Accordingly, the drinking table is provided with a refrigerating mechanism  40  in addition to the cooling mechanism  3 .  
         [0138]      FIG. 8  is a schematic view showing the cooling mechanism  3  having the cooling plate  31  and the refrigerating mechanism  40  having a refrigerating liquid.  
         [0139]     A refrigerating liquid  41  is filled in a refrigerating container  42 , and a cooling pipe  43  is arranged in the refrigerating liquid in a state of being wound in a coil shape.  
         [0140]     A cooling medium gas passes through the cooling pipe  43  and can cool the refrigerating liquid  41  at a minus temperature.  
         [0141]     Further, a circulating pipe  44  is arranged so as to be reciprocated in a coil shape.  
         [0142]     The liquid for drinking passing through the cooling plate  31  further passes through an inner side of the circulating pipe so as to be cooled by the refrigerating liquid  41  filled in the refrigerating container  42 , and the temperature thereof is further lowered.  
         [0143]     Accordingly, the beer having the minus temperature is discharged from the liquid discharging server  2 .  
         [0144]     In general, the temperature which can be cooled by using the cooling mechanism  3  provided with the cooling plate  31  is limited to 0° C., however, the beer having the minus temperature can be supplied by using the refrigerating mechanism  40  having the refrigerating liquid, so that it is possible to respond to various tastes.  
         [0145]     In this connection, there is a case that a range lower than the minus temperature of the beer is employed in correspondence to the kind of the liquid for drinking.  
         [0146]     On the contrary, in the case of the drinking table in which two liquid discharging servers are placed, it is possible to provide two liquids for drinking comprising the liquid for drinking which is cooled only by the cooling mechanism  3 , and the liquid for drinking which is cooled by both the cooling mechanism  3  and the refrigerating mechanism  40 .  
         [0147]     For example, one of two liquid discharging servers forms the cooling path using only the cooling mechanism  3 , and another thereof forms the cooling path using both of the cooling mechanism  3  and the refrigerating mechanism  40 , whereby it is possible to selectively supply the liquid for drinking having different temperatures.  
         [0148]     A rod-like heater  45  arranged in the refrigerating container  42  in  FIG. 8  is not normally used.  
         [0149]     It is necessary to clean all the passages through which the liquid for drinking passes, after using the drinking table. At this time, the inner side of the circulating pipe is simultaneously cleaned.  
         [0150]     In this case, since the refrigerating liquid  41  is lowered to the minus temperature, the cleaning liquid flowing within the circulating pipe is frozen and can not be cleaned.  
         [0151]     Accordingly, the cleaning liquid is passed through the inner side of the circulating pipe after heating the refrigerating liquid  41  by using the rod-like heater  45  so as to temporarily heat up to the plus temperature equal to or more than 0° C.  
         [0152]     The rod-like heater  45  is extremely important for maintaining the drinking table.  
         [0153]     [Other Embodiment] 
         [0154]     In this case, the measuring mechanism can employ a measuring mechanism having a different impeller structure.  
         [0155]      FIG. 9  is a schematic view showing the other modified embodiment of the measuring mechanism  5 A.  
         [0156]     As illustrated, the measuring mechanism  5 A in this case is provided with a nonconductive tubular housing  18 A, an impeller  19 A, a pickup coil (not shown), a liquid detecting sensor (not shown), and a rotational pulse generating portion  22 A.  
         [0157]     In this case, a magnetic body M is embedded in an axis of the impeller so as to detect the liquid amount.  
         [0158]     When the liquid for drinking flows in a direction of an arrow within the housing, the impeller  19 A rotates in a clockwise direction, and the pickup coil reads the rotation of the magnetic body M.  
         [0159]     The liquid detecting sensor can detect whether or not the liquid is filled within the flow path of the housing.  
         [0160]     Further, a function of the rotational pulse generating portion  22 A is the same as that of the measuring mechanism in  FIG. 3  mentioned above.  
         [0161]     The function of the measuring mechanism using the liquid fullness signal and the blade rotation signal is the same as the principle of the measuring mechanism in  FIG. 3 .  
         [0162]     The present invention is described above, however, the present invention is not limited to the embodiments mentioned above, and can be variously modified within the purpose thereof.  
         [0163]     The liquid for drinking in the present invention is not limited to the beer, and the present invention can be, of course, applied to the other liquids for drinking.  
         [0164]     The blade number of the impeller and the number of the magnetic bodies can be appropriately selected in correspondence to an accuracy of measurement in the liquid for drinking to be subjected.  
         [0165]     Further, for example, the control of the rotational pulse generating portion and the sub set may be structured by a micro processor system. In this case, a control process is executed in accordance with a processing procedure of a program mounted to ROM (read-only memory).  
         [0166]     Further, for example, the signal line with the digital box can employ various structured such as a current drive by an open collector via a wiring, an optical signal by an inexpensive plastic fiber and the like.  
         [0167]     Further, for example, the structure of the cooling mechanism and the refrigerating mechanism can be changed in design as far as the function is obtained.