Abstract:
A self-locking security mechanism for coin-operated machines. This mechanism consists of two units. The first unit mounts inside a coin-operated machine in alignment with the coin chute for receiving coins passing through the first unit. A second unit has a flexible bag secured thereon into which the coins are stored after passing through the second unit. This second unit also includes a door, which slides to an open condition by two teeth from the first unit when the second unit is connected by sliding into the first unit. The door is pushing the pivoting arm, which passes the snap stops and stays in preset condition. A pivoting arm is attached to the pivoting stopper with a spring between them. When the second unit is removed from the first unit, the door slides to a closed condition and releases the stopper. The spring lifts the stopper and blocks the door from sliding to an open condition. Only an authorized person can unlock the locked coin receptacle.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]      
         [0000]    
       
         
               
               
               
               
             
           
               
                   
               
             
             
               
                 3,797,735 
                 Mar. 19, 1974 
                 August M. Sciortino 
                 232/16 
               
               
                 3,807,627 
                 Apr. 30, 1974 
                 Robert M. Nitschneider 
                 232/15 
               
               
                 4,177,920 
                 Dec. 11, 1979 
                 August M. Sciortino 
                 232/16 
               
               
                 4,267,962 
                 May. 19, 1981 
                 Ronald A. Domkowski 
                 232/15 
               
               
                 4,289,269 
                 Sep. 15, 1981 
                 August M. Sciortino 
                 232/16 
               
               
                 4,291,831 
                 Sep. 29, 1981 
                 Ronald A. Domkowski 
                 232/15 
               
               
                 4,359,184 
                 Nov. 16, 1982 
                 August M. Sciortino 
                 232/16 
               
               
                 4,372,479 
                 Feb. 8, 1983 
                 August M. Sciortino 
                 232/15 
               
               
                 4,456,165 
                 Jun. 26, 1984 
                 August M. Sciortino 
                 232/15 
               
               
                 5,611,483 
                 Mar. 18, 1997 
                 Michael J. Sciortino 
                 232/15 
               
               
                 6,598,787 B1 
                 Jul. 29, 2003 
                 James J. Grinsteiner 
                 232/15 
               
               
                   
               
             
          
         
       
     
       FEDERALLY SPONSORED RESEARCH 
       [0002]    Not Applicable 
       SEQUENCE LISTING OR PROGRAM 
       [0003]    Not Applicable 
       BACKGROUND 
       [0004]    1. Field of Invention 
         [0005]    This invention relates to coin-operated vending machines, specifically to an improved coin security mechanism for collecting and storing money. 
         [0006]    2. Prior Art 
         [0007]    Coin operated machines, such as machines for vending products, commonly include a coin receptacle installed in the interior thereof in position to receive and collect coins which have been inserted to activate the machine. Typically, vending machines are serviced by one or more route men and technician who periodically visit the machine and replenish the supply of merchandise and collect the money which has been accepted and stored by the machine. In some installations different individuals may collect the coin receptacles and replenish the supply of merchandise. 
         [0008]    A serious problem has developed in the industry concerning the pilferage of coins by persons collecting money from the machines. Dishonest individuals have removed portions of the money collected before turning the money in to the home office. Moreover, this is accomplished without damage to any parts of the machine by persons who have access to the interior of the cabinet. It is not an easy matter to pinpoint the source of such losses. 
         [0009]    Various systems have been proposed in the prior art for overcoming the problem outline above. For example, it has been suggested that an assembly be provided that includes a normally closed opening on the mouth of the coin receptacle, in which the opening is unblocked as the coin receptacle is assembled on the coin mechanism. The opening is blocked when the coin receptacle is removed from the coin mechanism, so that the route man is always carrying a closed coin receptacle, whether it is full or empty. Stated otherwise, the person servicing the machine is provided with a normally locked empty coin receptacle. In order to collect the money from a particular machine, the route man must remove the full receptacle, which automatically closes the receptacle&#39;s mouth as it is removed. The person then assembles the empty receptacle into the coin mechanism and in so doing, opens the mouth of the replacement receptacle. Servicemen return the locked receptacle to the main office whereat a receptacle is opened by use of a key. This key is not accessible to the servicemen. In this way, a person collecting coin receptacles cannot gain access to coins therein without damaging the receptacle in some way, which would make his guilt apparent. 
         [0010]    While systems of the prior art for achieving the result outlined above have been more or less partially solved. In U.S. Pat. Nos. 3,807,627 and 4,267,962 and 4,291,831 a security mechanism has two locks. One lock controls the door in open condition when the coin receptacle is installed into the security mechanism and in locked condition when it is removed for delivery to the home office. The second lock prevents the coin receptacle from turning after it is secured in the security mechanism. This second lock increases the overall security mechanism cost. 
         [0011]    The person servicing the machine removes the receptacle from the security mechanism to install an empty one. During this replacement, nothing covers the exposed key that controls the door lock. A serviceman can make an impression of the key and create a duplicate key. Next time dishonest individuals will be able to open the coin receptacle and remove a portion of the money collected before returning the coin receptacle to the home office. 
         [0012]    Using the same key for the door lock reduces the protection for all coin receptacles. If each machine has a personal key, it creates a disadvantage as each vending machine must have two personal bags and a key. The home office would need to manage a large quantity of keys. In this situation, if something broke it would be necessary to replace the entire security mechanism in that vending machine as the key and the corresponding receptacles are not universal. 
         [0013]    The security mechanism mounted inside the vending machine is under a coin chute that allows individual coins to fall into the coin bag without jamming. This coin bag is delivered to the home office, in which only authorized people can remove the money with a key that opens the receptacle mouth. The authorized key holder then flips the bag so that the coin mouth faces downward. All coins in the bag are jammed at the mouth because the mouth is too small for more than one coin to pass through. 
         [0014]    Coin operated machines originate from different manufacturers for many purposes, and each model has a specific configuration of its internal structure. This requires a custom adaptor between the coin chute and the security mechanism to guide the coins into the coin receptacle. 
         [0015]    Other types of security mechanisms referred in U.S. Pat. Nos. 4,359,184 and 4,456,165 are not fully secured. Any person who has access to coin receptacles can open it, make a pilferage, reset the mechanism and close it if there are no additional locks or seals. 
         [0016]    Using a spring stopper in the coin receptacle is a huge disadvantage. The spring stopper is flexible and bends during use. The stopper part must be durable and should not bend to allow parts to pass over the spring stopper when the receptacle is removed from the vending machine. This problem was described in U.S. Pat. No. 4,456,165. This security mechanism that has a spring stopper cannot stop pilferage. 
         [0017]    A modified security mechanism design introduced a rib strengthened spring with a groove. The groove formed directly across the width of the spring stopper. If someone reinstalls the receptacle, the spring stopper will shear at the grooved location and destroy the receptacle, which cannot be repaired. This modified design of the spring stopper with the rib strengthened spring and groove is not reliable. In normal operation the biggest stress is concentrated at the grooved area, which mechanically weakens and breaks after repeated use. 
         [0018]    U.S. Pat. No. 4,289,269 represents a funnel with mounting brackets. The mounting brackets inside the funnel mount only to a horizontal flat surface. In the past, all coin operated machines are different and some have a large opening for the coins. In this case, the mounting brackets are in the way of the coins and the funnel needs an additional custom plate for mounting the security mechanism. 
         [0019]    In U.S. Pat. Nos. 5,611,483 and 6,598,787 B1 different types of security mechanisms are shown with a coin bag. This bag has a zipper for removing coins and allows access for resetting the receptacle mechanism. The zipper of a bag must be secured by an additional lock or a temporary seal. This design of the receptacle mechanism has a problem. The person who has knowledge about that mechanism can easily open the receptacle door with a wire hook. The wire hook can be inserted through the coin bag and catches the lock arm that releases the receptacle door when the arm pulled down. 
         [0020]    Accordingly, the present inventions provide a security system, which is adaptable for use in coin operated vending machines and has the above-noted problems in the coin security mechanism. The security system, in accordance with the proposed invention, has improved versatility and is readily adapted to fit a variety of vending machines without additional brackets and modifications to the vending machine. 
       SUMMARY OF THE INVENTION 
       [0021]    The object of my invention is to provide an improved self-locking mechanism with an attached coin bag that is used in vending machines to prevent a serviceman from gaining access to the interior of the coin receptacle. 
         [0022]    Moreover, the device in accordance with this invention has an improved versatility and is readily adapted to fit a variety of vending machines without substantial modification to the vending machine. 
         [0023]    The self-locking mechanism is comprised of a pair of plastic molded units that can be assembled in any vending machines. The first unit has a funnel with flexible legs for installation in a specified location in the vending machine. A second unit is constructed to be removable assembled to the first unit for receiving the coins that flow through the first unit. The second unit has a flexible bag secured thereon into which the coins are stored in after passing through the second unit. 
         [0024]    The two units have cooperating teeth which belong to the first unit. A second unit has a door which engages with the teeth of the first unit when the two units are assembled together by sliding the second unit into the first unit. The door is pushing a locking member. The locking member consists of: pivoting arm, stopper, and torsion spring assembled together by a pin. The torsion spring pushes the pivoting arm and the rocking stopper in opposite directions. When the second unit is fully installed, the door slides in an open condition and the pivoting arm slides over the stops in a preset condition. 
         [0025]    When the second unit is removed from the first unit, the door slides in a closed condition and releases the locking member. The torsion string lifts the stopper that blocks the door from sliding back in an open condition. This stopper keeps the door from opening during closed condition, until an authorized person resets the second unit. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0026]    Further objects and features of the present invention will become more apparent from the following description of a preferred embodiment thereof, as shown in the accompanying drawings, in which: 
           [0027]      FIG. 1  is a perspective view looking downward on the present invention of the self-locking security mechanism. 
           [0028]      FIG. 2  is an exploded perspective view of the self-locking security mechanism, showing the interrelationship between the first and second unit. 
           [0029]      FIG. 3  is an exploded perspective view of the first unit of the security mechanism in accordance with this invention. 
           [0030]      FIG. 4  is a top view of the first unit shown with sectional lines  1  and  2 . 
           [0031]      FIG. 5  is a sectional view taken along line  1 - 1  of the  FIG. 4 . 
           [0032]      FIG. 6  is a sectional view taken along line  2 - 2  of  FIG. 4 , illustrating a different manner of adopting the first unit into a machine that has a different mounting position. 
           [0033]      FIG. 7  is a detail view taken from  FIG. 6  and illustrating a mounting leg. 
           [0034]      FIG. 8  is an exploded view of the second unit assembly, showing the interrelationship between the receptacle and a bag holder assembly. 
           [0035]      FIG. 9  is an exploded view of the receptacle assembly. 
           [0036]      FIG. 10  is a top view looking downward of the receptacle assembly with section lines  4 ,  5 ,  6  and  7 . 
           [0037]      FIG. 11  is a sectional view taken along line  7 - 7  of  FIG. 10  with section line  8 . 
           [0038]      FIG. 12  is a sectional view taken along line  8 - 8  of  FIG. 11 . 
           [0039]      FIG. 13  is a sectional view taken along line  4 - 4  of  FIG. 10 . 
           [0040]      FIG. 14  is a sectional view taken along line  5 - 5  of  FIG. 10 . 
           [0041]      FIG. 15  is a sectional view taken along line  6 - 6  of  FIG. 10 . 
           [0042]      FIG. 16  is an exploded view of the locking member. 
           [0043]      FIG. 17  is a bottom view of the locking member with section lines  9 ,  10  and  11 . 
           [0044]      FIG. 18  is a sectional view taken along line  11 - 11  of the  FIG. 17 . 
           [0045]      FIG. 19  is a sectional view taken along line  9 - 9  of the  FIG. 17 . 
           [0046]      FIG. 20  is a sectional view taken along line  10 - 10  of the  FIG. 17 . 
           [0047]      FIG. 21  is an exploded view of the bag holder assembly. 
           [0048]      FIG. 22  is a top view of the bag holder assembly with section line  12 - 12 . 
           [0049]      FIG. 23  is a sectional view taken along line  12 - 12  of the  FIG. 22 . 
           [0050]      FIG. 24  is a detail view taken from  FIG. 23  and illustrating attached flexible bag. 
           [0051]      FIG. 25  is a top view of the security locking mechanism with section line  14 - 14 . 
           [0052]      FIG. 26  is a sectional view taken along line  14 - 14  of the  FIG. 25  of the invention shown with the first unit&#39;s teeth touching the door of the second unit. 
           [0053]      FIG. 27  is a top view of the two units looking downward on the assembly and representing a section line  15 - 15 . 
           [0054]      FIG. 28  is a sectional view taken along line  15 - 15  of the  FIG. 27  of the invention showing the first unit&#39;s teeth pushing the door with the locking member of the receptacle to reach the stops of the bag holder assembly. 
           [0055]      FIG. 29  is a top view on the security mechanism with section line  16 - 16 . 
           [0056]      FIG. 30  is a sectional view taken along line  16 - 16  of  FIG. 29  of the invention shown with the first unit&#39;s teeth pushing more on the door with the locking member of the receptacle, and the arm sliding on top to the stops of the bag holder assembly. 
           [0057]      FIG. 31  is a perspective view of the two units looking downward on the assembly and representing a section line  17 - 17  and the first unit&#39;s locking to the receptacle pin. 
           [0058]      FIG. 32  is a sectional view taken along line  17 - 17  of the  FIG. 31  of the invention shown with the first unit&#39;s teeth pushing more the door with the locking member of receptacle and the arm&#39;s teeth path the stops of the bag holder assembly. 
           [0059]      FIG. 33  is a perspective view of the two units looking downward on the assembly and representing a section line  18 - 18  and the receptacle pin unlocked from the first unit. 
           [0060]      FIG. 34  is a sectional view taken along line  18 - 18  of the  FIG. 33  of the invention shown with the first unit&#39;s teeth disengaged with the door. The door slides in closed position and released the stopper of a locking member. 
           [0061]      FIG. 35  is a perspective view of the receptacle with the bag holder, looking downward and representing a section line  19 - 19 . 
           [0062]      FIG. 36  is a sectional view taken along line  19 - 19  of the  FIG. 35  of the invention, shown with the opened lock of receptacle and removed the bag holder. 
           [0063]      FIG. 37  is a perspective view of the second unit, looking downward on the assembly and representing a section line  20 - 20 . 
           [0064]      FIG. 38  is a sectional view taken along line  20 - 20  of the  FIG. 37  of the invention and representing the second unit in reset condition. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0065]    As seen in the drawings, the self-locking security mechanism, in accordance with this invention, includes two units. The first unit is assembly  100  and second unit is assembly  500  as shown in  FIG. 2 . Unit  100  is adapted to be secured inside a vending machine by rivets (not shown) and designed to receive the various coins which are inserted into the machine during the vending operation. 
         [0066]    More specifically, unit  100  is illustrated in  FIG. 3 . Referring to those figures unit  100  consists of: mounting connector  110 , receiver  120 , lock  130 , spring  140 , and cover  150 . All these parts, except spring  140 , are made from a lightweight cast plastic material to minimize weight and expense. 
         [0067]    Connector  110  and receiver  120  are assembled together by rivets  160  and washers  170 . Rivets  160  go through holes  121  and  114  of connector  110  and receiver  120  appropriately. Plate  118  of connector  110  has square hole  119  and notch  116  which are lined up with square hole  127  and notch  124  of receiver  120 .  FIG. 5  represents a section view of a square window which lets coins pass through unit  100 . 
         [0068]    The cover  150  is inserted into rectangular pocket  123  of receiver  120 . The depth of this pocket matches with thickness of ribs  151 ,  152  and  153  of cover  150 . That keeps ribs of cover  150  between receiver  120  and plate  118  of connector  110 . The section view on  FIG. 6  and exploded view on  FIG. 3  shows receiver  120  has groove  122  which allows lock  130  to slide when covered by plate  118 . Lock  130  has pin  131  which is inserted into spring  140  to keeps spring between cover  150  and pocket  123 . 
         [0069]    Connector  110  has funnel  117  which lines up with the square hole  119 . Funnel  117  has a shape of a truncated pyramid that allows unit  100  to reach the coin chute in the corner of a vending machine. The top of funnel  117  has legs  113  with mounting holes  112 . Legs  113  have grooves  111 . Grooves  111  increases flexibility which allows legs  113  to bend and attach to any surface under the coin chute in a vending machine.  FIG. 6  and  FIG. 7  show legs  113  in different manner. 
         [0070]    The bottom part of receiver  120  has grooves  125  and  126  for ribs  227  and  228  to insert unit  500 . Receiver  120  has two teeth,  128  and  129 , which urging cooperates with door  250  of receptacle  200 . 
         [0071]    The second unit assembly  500  is major component of the present security system and consists of: receptacle assembly  200  with coin bag assembly  300 . Both receptacle  200  and coin bag  300  are illustrated in  FIG. 8 . 
         [0072]    More specifically receptacle  200  is shown on  FIG. 9 . Receptacle mechanism  200  consists of upper case  220  and lower case  280 . Both cases constrain the internal parts so that they move properly during operation. 
         [0073]    Upper case  220  is assembled with lock  210 . Lock  210  is inserted into counter-bore  226  and passes through upper case  220 . Nut  203  tightens lock  210  from the other side.  FIG. 11  shows the installed lock  210 . 
         [0074]    The next main part of receptacle  200  is door  250 . Door  250  has the extension  257  with hole  251 . Spring  204  is attached to that hole. Rivet  202  inserted into hole  224  of upper case  220  and passes through the other end of spring  204 . Upper case  220  has rib  238 . Rib  238  and walls  239  and  240  constrain door  250  from rotating and moving properly during operation. 
         [0075]    Two other parts of receptacle  200  are spacers  260  and  270 . They are assembled with upper case  220  to keep door  250  inside upper case  220 . Door  250  is able to slide in an open or closed position because spacers  260  and  270  create enough clearances for walls  255  and  256 .  FIG. 14  shows door  250  installed between upper case  220  and spacers  260  and  270 . Spacer  260  is inserted into notch  235  of upper case  220 , and other end by step  261  catch wall  230  of upper case  220 . Wall  230  prevents spacer  260  from sliding out of upper case  220 . Spacer  270  is assembled the same way as spacer  260  because they are identical.  FIG. 12  and  FIG. 13  represent as stated above. 
         [0076]      FIG. 16  shows an exploded view of locking member  400 . Locking member  400  consists of five main parts: stopper  410 , pivoting arm  420 , torsion spring  402 , slider  430 , and pin  401 . Slider  430  has two vertical walls  432  and  431  with holes  434  and  433  appropriately. The arm  420  has walls  422  and  421  which are inserted between walls  432  and  431  of slider  430 . Holes  434  and  433  of the slider are lined up with holes  424  and  423  of arm  420 . Arm  420  has extensions  426  and  425  which lay on horizontal walls  436  and  435  of slider  430 . The coil of spring  402  is inserted between the arm&#39;s walls  422  and  421 , and lines up with holes  424  and  423 . Holes  414 ,  413  of the stopper  410  line up with the slider&#39;s holes  434  and  433 . Handle  415  of stopper  410  passes through notch  427  of arm  420 . Pin  401  passes through the aligned holes  433 ,  423 , coil of spring  402 , holes  424  and  434  and completes the assembly of locking member  400 .  FIG. 17 ,  FIG. 18 ,  FIG. 19  and  FIG. 20  represent this locking member  400 . 
         [0077]    Slider  430  has extension  441  with hole  440 . Spring  205  is assembled with hole  440 . Rivet  202  passes through the other end of spring  205 . Locking member  400  with spring  205  inserted into upper case  200  between spacers  260  and  270  until walls  438  and  437  of the slider lay on spacers  270  and  260 . Spring  205  keeps locking member  400  engaged with door  250 .  FIG. 11  and  FIG. 12  depict the steps described above. 
         [0078]    Walls  293  and  291  of the lower case line up with walls  240  and  241  of the upper case thereafter. Surface  296  of the lower case  280  lay on surface  235  of the upper case  220 . T-lock  221  is inserted inside lower case  280 . Lower case  280  slides until wall  232  of upper case  220  engages with surface  297  of lower case  280 , hereby T-lock  221  slides into notch  281 . Notches  283  and  282  of lower case  280  cover spacers  270  and  260  when lower case  280  is engaged with upper case  220 . The holes  224 ,  225  from upper case  220  line up with holes  284  and  285  from lower case  280 . Rivets  201  and  202  can pass through lower case  280  and washers  207 ,  206 . Rivets  201 ,  202  caught washers  207 ,  206  thereafter upper case  220  and lower case  280  cannot disengage. 
         [0079]    Spacers  260  and  270  with ribs  289 ,  290  and  292  of the lower case keep slider  430  of locking member  400  aligned for sliding with door  250 .  FIG. 14  and  FIG. 15  depict these steps. 
         [0080]      FIG. 8  shows coin bag assembly  300  with receptacle  200 . More specifically, the coin bag assembly is shown on  FIG. 21 . Coin bag assembly  300  consists of plate  310 , ring  320 , bag  330  and protector  340 . 
         [0081]    Coin bag assembly  300  can be of any shape and capacity. The top part of bag  330  contains ring  320  which is sewn to the bag&#39;s wall  311  and  332 . Protector  340  is inside bag  330  and cannot be removed from bag  330  because protector  340  is bigger than ring  320 . 
         [0082]    Plate  310  has hole  318  which allows coins to pass through into bag  330 . The bottom part of plate  310  has legs  315  with step  316  and taper  317 . For attaching the plate  310  to bag  330 , the legs  315  should pass through ring  320  and protector  340 . When ring  320  engages with surface  317 , legs  315  bend inside to ring  320  and steps  316  go inside into bag  330 . Step  316  passes through ring  320  and snaps to ring  320 . The same operation happens during the assembly of protector  340  with plate  310 . Step  316  passes through rib  341  and snaps to rib  341  of protector  340 . Protector  340  prevents legs  315  from bending and the disassembly of coin bag assembly  300 .  FIG. 23  and  FIG. 24  represent as stated above. 
         [0083]    Coin bag assembly  300  slides between ribs  290 ,  292 ,  294 , and  295  of lower case  280 . Plate  310  slides until it engages stops  287  and  288 . Counterbore  311  of plate  310  lines up with pin  211  of lock  210 . The authorized person presses pin  211  and locked lock  210 . Pin  211  is inserted into counterbore  311  to prevent remove coin bag assembly  300  from receptacle  200 . At that moment, second unit  500  is fully assembled and ready for installation into a vending machine. 
         [0084]    First unit  100  is installed inside the vending machine. A service man takes second unit  500  and lines up ribs  227 ,  228  of receptacle  200  with grooves  126 ,  125  of receiver  120 . The second unit is connected by sliding ribs  227  and  228  into grooves  125  and  126  of the first unit. During this time, fingers  128  and  129  of receiver  120  slide through grooves  233  and  234  of the receptacle  200  until they reach notches  252  and  253  of door  250 . This is shown in  FIG. 26 . 
         [0085]    When inserting receptacle  200  into receiver  120 , fingers  128  and  129  become engaged with door  250 . Fingers  128  and  129  pushes door  250  and stretches extension spring  204  to slightly open window  231  of receptacle  200 . This is shown in  FIG. 28 . 
         [0086]    Door  250  has wall  254  which is engaged with wall  439  of slider  430 . Thereby locking member  400  travels the same distance with door  250  and stretches extension spring  205 . 
         [0087]    A service man continuously inserts unit  500  into unit  100 . Thereafter fingers  128  and  129  push slightly more door  250  with locking member  400 . The arm&#39;s teeth  427  and  428  of locking member  400  become engaged with stops  312  and  313  of plate  310 . 
         [0088]    On  FIG. 27 , finger  229  of receptacle  200  slides into notches  116  and  124  of parts  110  and  120  appropriately. Finger  229  is urging with the angle end of lock  130 . Thereafter lock  130  moves and compresses spring  140 . 
         [0089]    Unit  500  continuously inserts more into unit  100 . Door  250  opens slightly more to move locking member  400 . Teeth  427  and  428  slide above stops  312  and  313 . Arm  420  pivots and lifts the end with its teeth and compresses spring  402 . Finger  229  pushes lock  130  of unit  100  thereby lock  130  moves away from notches  124  and  116 . This is shown in  FIGS. 29 and 30 . 
         [0090]    As the service man fully inserts second unit into first unit, finger  229  of receptacle  200  passes lock  130  of unit  100  and reaches the end of notches  124  and  116  of parts  110  and  120  appropriately. This is shown in  FIG. 31 . When finger  229  passes lock  130 , spring  140  pushes lock  130  back to intersect notches  116  and  124  and lock unit  500  inside unit  100 . Fingers  128  and  129  of receiver  120  pass window  231  and reach notches  236  and  237 . Door  250  is fully opened and window  231  lines up with windows  119  and  127  of unit  100 . Locking member  400  travels with door  250  and teeth  427  and  428  of arm  420  pass stops  312  and  313  of plate  310 . Compressed spring  402  moves pivoting arm  420  back until extensions  425  and  426  of arm  420  lay on walls  435  and  436  of slider  430  appropriately. Spring  402  keeps arm  420  in preset condition. At that moment unit  500  is installed into unit  100 . 
         [0091]    Coins can freely pass through security mechanism inside a bag during purchasing any merchandise from a vending machine.  FIG. 32  depicts the steps explained above. 
         [0092]    After some period, a service man refills the merchandises in the vending machine and replacing the full receptacle. To remove unit  500  from vending machine a service man needs to execute a simple operation. The service man moves handle  132  of lock  130  thereby lock  130  compresses spring  140 . Lock  130  slides from notches  116  and  124  of unit  100  and releases finger  229  of receptacle  200 . At this moment, door  250  has contact with teeth  128  and  129  of unit  100 . Therefore receptacle  200  slides out from receiver  120 . Door  250  moves to closed condition. In closed condition, spring  204  moves door  250  to cover slightly window  231  of receptacle  200 . At this time, spring  205  moves locking member  400  until teeth  427  and  428  of arm  420  engage with stops  312  and  313  of plate  310 . Spring  402  keeps arm  420  in contact with slider  430  and prevents arm  420  from passing stops  312  and  313 . 
         [0093]    Door  250  moves more to a closed condition and fully covers window  231 . Door  250  stops moving when it touches wall  230  of upper case  220  and disengages with stopper  410  of locking member  400 . Spring  402  lifts the pivoting end of stopper  410  and blocks door  250  from sliding again in open condition. This is shown in  FIG. 34 . At that moment, receptacle  200  is locked thereafter only the authorized person can open it. A service man removes unit  500  and delivers it to the main office where an authorized person can remove the coins from the bag with a key. 
         [0094]    When second unit is delivered to the main office, the authorized person takes a key for lock  210  and unlocks it. Pin  211  of lock  210  moves from counterbore  311  and releases plate  310 . The authorized person removes the plate  310  with attached bag  330  and removes coins from bag  330  through window  318 . This is shown in  FIG. 36 . 
         [0095]    To reset receptacle  200 , authorized person catches notch  416  and pulls handle  415  of stopper  410 . Spring  402  is compressed by pivoting stopper  410  on pin  401  and disengages with door  250 . At this moment, nothing holds locking member  400 . Spring  205  moves locking member  400  to wall  254  of door  250 . Now coin receptacle  200  is reset. This is shown in  FIG. 38 . 
         [0096]    Thereafter authorized person installs coin bag assembly  300  into receptacle  200 . Plate  310  slides between ribs  290 ,  292 ,  294 , and  295  until the plate  310  touches teeth  427  and  428  of arm  420 . At this moment, plate  310  is not fully inserted. The authorized person pushes arm  420  so it pivots on pin  401  and compresses spring  402 . Teeth  427  and  428  disengage from plate  310 . Coin bag assembly  300  slightly inserts more into receptacle  200  and passes teeth  427  and  428  of arm  420  prior to stops  312  and  313 . The authorized person releases arm  420  so that spring  402  returns to its initial position. Coin bag assembly  300  is fully inserted into receptacle  200 . The authorized person pushes pin  211  of lock  210  to fix plate  310 . Now second unit  500  is fully assembled and ready to be installed in a vending machine.