JP5348780B2 - Conveyor type dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyer dishwasher surely detecting a rack in a predetermined position. <P>SOLUTION: In this conveyer dishwasher 1, a rack sliding surface 31a extending on the top face of a rack rail 2 is utilized to detect the rack 4 by a rocking plate 51. The rocking plate 51 abuts on a bottom surface 4a of the rack 4 to descend, and projects over the rack sliding surface 31a when not abutting on the bottom surface 4a of the rack 4. Thus, unless the rack 4 is dislocated from the rack rail 2 due to unforeseen circumstances, the base 4a of the rack 4 in the process of being carried is continuously brought into sliding contact with the rack sliding surface 31a so that the certainty of detecting passing of the rack 4 can be heightened by utilizing the dead load of the rack 4. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a conveyor type dishwasher capable of cleaning and rinsing dishes while conveying a rack by a conveyor.

  Conventionally, as a technique in such a field, there is a conveyor type dishwasher described in Patent Document 1. In the washing room of the conveyor type dishwasher, there is provided a conveyor for transporting the tableware stored in the rack from the washing area to the rinsing area. In addition, a pair of upper and lower cleaning nozzles for cleaning dishes is arranged in the cleaning area, and a pair of upper and lower rinsing nozzles for rinsing dishes are arranged in the rinsing area. The rack automatically cleans and rinses the tableware in the cleaning chamber while being transported by the conveyor. In such a conveyor type dishwasher, since the rack flows in the washing chamber, a switch for starting washing and rinsing is necessary. The switch includes a shaft portion that extends in the vertical direction along the inner side surface of the housing of the dishwasher, a contact portion that is provided at a lower portion of the shaft portion and projects in the horizontal direction toward the rack, and a shaft portion And a sensor for detecting the rotation of the. The contact portion of the switch starts to rotate when the corner portion on the front side of the rack hits, and the movement of the rack can be continuously detected by keeping the side surface of the rack hitting.

JP 2001-112690 A

  However, when the corner portion on the front side of the rack is damaged, the contact portion of the switch cannot be reliably applied to the rack, and detection failure such as detection timing delay is likely to occur. In addition, when a lateral shift that causes the rack to come off from the rack rail occurs, the rack easily hits the switch, and the contact portion of the switch may be damaged.

  An object of this invention is to provide the conveyor type dishwasher which detected the rack reliably in the predetermined position.

The present invention is a conveyor type dishwasher that cleans tableware with spray water from a spray nozzle while transporting tableware stored in a rack along a rack rail extending in a cleaning chamber by a conveyor.
An elevating member that contacts and lowers the bottom surface of the rack and protrudes above the rack sliding surface extending on the top surface of the rack rail when not contacting the bottom surface of the rack;
A detection unit that detects the lifting and lowering of the lifting member ,
The elevating member is a rocking plate that rocks in a vertical plane around a rotating shaft fixed to the rack rail .

  This conveyor type dishwasher makes it possible to detect a rack by an elevating member using a rack sliding surface extending on an upper surface of a rack rail. The elevating member descends in contact with the bottom surface of the rack, and projects upward from the rack sliding surface when not in contact with the bottom surface of the rack. Therefore, unless the rack is removed from the rack rail due to unforeseen circumstances, the bottom of the rack being transported continues to be in sliding contact with the sliding surface of the rack. Can be increased.

The protruding end of the elevating member that can protrude from the opening formed on the rack sliding surface is preferably positioned above the rack sliding surface even when it is in contact with the bottom surface of the rack and lowered. It is.
When such a configuration is adopted, when the bottom surface of the rack sliding on the rack sliding surface reaches the opening on the rack sliding surface, it is lifted so as to float from the rack sliding surface by the protruding end of the elevating member. Therefore, it is possible to prevent the rack from being caught by the edge of the opening, and it is possible to prevent the bottom surface of the rack from being scraped or the rack from being damaged.

Also, swing plate, it is preferable to have heavier portion corresponding to the weight of the pendulum.
By adopting such a configuration, the swing plate can be returned to the original position by its own weight without using an elastic member such as a spring or a hinge. Therefore, the durability can be increased without complicating the structure, which contributes to cost reduction.

Further, it is preferable that a magnet is fixed to a portion corresponding to the weight of the pendulum, and the detection unit is a magnetic sensor that detects magnetism of the magnet.
When such a configuration is adopted, the magnet can be used as a weight, and the structure can be easily prevented from becoming complicated.

The conveyor that reciprocates in the front-rear direction along the rack rail includes a frame that extends along the rack rail and from which the feed claws protrude, and a guide roller that protrudes horizontally from the frame and contacts the rack rail. The rack rail is provided with a roller rolling surface extending parallel to the rack sliding surface, and swings on the roller rolling surface when the swinging plate is not in contact with the bottom surface of the rack. It is preferable that the portion of the plate corresponding to the weight of the pendulum abuts.
By adopting such a configuration, it is possible to achieve the rotation regulation of the swing plate by effectively utilizing the roller rolling surface on which the guide roller of the conveyor rolls. This eliminates the need for providing a separate stopper portion and contributes to simplification of the structure and cost reduction.

Further, the protruding portion of the swing plate that can protrude from the opening formed in the rack sliding surface has an upper plate portion extending in the width direction of the rack sliding surface and an opening at both ends in the width direction of the upper plate portion. It is preferable that the hanging plate portion formed in the vicinity of the edge is formed in a U-shaped cross section.
In this way, as a result of the protruding portion of the swing plate having a U-shaped cross section, the strength of the swing plate can be increased. Furthermore, since the drooping plate portion of the swing plate and the edge of the opening are brought close to each other, the toothpick and leftovers remaining on the tableware and the rack are placed in the gap between the drooping plate portion of the swing plate and the edge of the opening. It becomes difficult to enter. As a result, the operation failure of the swinging plate hardly occurs and the rack detection failure can be eliminated. Further, since the upper plate portion is widened, it is easy to cope with the lateral displacement of the rack on the rack rail, and detection failure can be avoided.

The swing plate that can project from the opening formed on the rack sliding surface is located upstream of the injection nozzle in the rack transport direction, and the opening is located downstream of the projecting end of the swing plate in the rack transport direction. It is preferable that the water jet is extended and the jet water from the jet nozzle located above passes through the extended portion of the opening and is applied to the rotating shaft that supports the protruding swing plate.
As described above, since the opening is expanded on the downstream side of the protruding end of the swing plate, the spray water can be easily guided to the inner side of the rack rail through the expanded portion. As a result, it becomes easy for the spray water to hit the rotating shaft located inside the rack rail, and the amount of spray water applied to the rotating shaft can be increased. Even if leftovers adhere to the rotating shaft, they can be washed away automatically by the water jet. This makes it difficult for the oscillating plate to malfunction, and by providing an extended part in the opening, it becomes easy to check the rotating shaft during maintenance, and it is easy to insert a rod etc. from the expanded part, and it accumulates on the rotating shaft. Easy to clean the deposits.

  According to the present invention, a rack can be reliably detected at a predetermined position.

It is a perspective view which shows one Embodiment of the conveyor type dishwasher which concerns on this invention. It is sectional drawing of the dishwasher shown by FIG. It is a perspective view which shows a rack rail and a conveyor. It is a principal part expanded sectional view of a conveyor. It is a principal part expanded sectional view of a rack rail. It is a perspective view which shows a rocking | fluctuation plate. It is a top view which shows the principal part of a rack rail. It is sectional drawing which shows the rocking | swiveling plate of a steady state. It is sectional drawing which shows the rocking | swiveling plate pressed by the rack. It is a timing chart which shows the relationship between a rack detection switch and a pump. It is sectional drawing which shows another rack detection switch. It is sectional drawing which shows another rack detection switch.

  Hereinafter, a preferred embodiment of a conveyor type dishwasher according to the present invention will be described in detail with reference to the drawings. The following “upstream” and “downstream” are based on the rack transport direction.

  As shown in FIG. 1, a soil table 5 is placed on the left side of the conveyor type dishwasher 1 as viewed from the operator side, on which a rack 4 containing dirty dishes (for example, dishes) 3 is placed. Is provided with a clean table 6 on which a rack 4 containing the washed tableware 3 is placed.

  The conveyor-type dishwasher 1 is supported by four legs 8 provided at the lower end of a stainless steel casing 7, and the conveyor-type dishwasher 1 has an opening / closing door that contributes to the opening and closing of the cleaning room S. 9 is provided. The casing 7 has a two-stage structure of an upper casing 7 a having a cleaning chamber S and a lower casing 7 b having a cleaning tank 10.

  As shown in FIG. 2, a pair of left and right extending in a washing room S provided in the casing 7 of the conveyor type dishwasher 1 so as to bridge between the soil table 5 and the clean table 6. The rack rail 2 is installed. The rack 4 placed on the rack rail 2 is transported in one direction by a conveyor 20 disposed in the cleaning chamber S.

  The cleaning chamber S is partitioned by a curtain 11, and the entrance side is a cleaning region S1, and the exit side is a rinsing region S2. Furthermore, the upper end of the curtain 12 is fixed to the casing 7 so as to close the inlet C of the conveyor type dishwasher 1, and the upper end of the curtain 13 is fixed to the casing 7 so as to close the outlet D of the conveyor type dishwasher 1. Has been. The curtains 11, 12, and 13 are formed with strip-shaped cuts to allow the rack 4 to pass therethrough.

  In the cleaning region S1, an upper cleaning nozzle (upper spray nozzle) 14 for spraying cleaning water from above and a lower cleaning nozzle (lower spray nozzle) 15 for spraying cleaning water from below are arranged. The upper cleaning nozzle 14 is connected to the cleaning pump P1 through the water supply pipe 16, and the lower cleaning nozzle 15 is connected to the cleaning pump P2 through the water supply pipe 17. The suction ports of the cleaning pumps P1 and P2 communicate with the cleaning tank 10, and water after cleaning and after rinsing are stored in the cleaning tank 10, and excess cleaning water in the cleaning tank 10 flows into the overflow pipe 18. Is discharged to the outside. Reference numeral 19 denotes a detergent supply device.

  In the rinsing region S2, an upper rinsing nozzle (upper spray nozzle) 21 for spraying rinsing water from above and a lower rinsing nozzle (lower spray nozzle) 22 for spraying rinsing water from below are arranged. The upper rinsing nozzle 21 and the lower rinsing nozzle 22 are connected to a rinsing pump P3 via a water supply pipe 23. The suction port of the rinsing pump P3 communicates with the rinsing tank 24, and clean water heated to a temperature suitable for rinsing with a gas booster or an electric booster is stored in the rinsing tank 24. In addition, the code | symbol 25 is a rinse agent supply apparatus.

  As shown in FIGS. 3 and 4, a pair of left and right rack rails 2 is fixed to the lower housing 7 b, and the rack rails 2 are connected to an upper plate 31 that extends straight in the longitudinal direction, and an upper plate 31. The side plate 32 and the lower plate 33 extending in parallel with the upper plate 31 are formed in a U-shaped cross section, and a skirt piece 34 is provided at the free end of the upper plate 31. The upper surface of the upper plate 31 is used as a rack sliding surface 31a on which the bottom surface of the rack 4 slides, and the upper surface of the lower plate 33 is used as a roller rolling surface 33a on which the guide rollers 43 attached to the conveyor 20 roll. Used. A guide bar 37 that prevents a lateral shift of the rack 4 on the rack rail 2 is fixed to the rack rail 2.

  The conveyor 20 includes a frame body 40 extending along the rack rail 2, and the frame body 40 extends along the rack rail 2 and is parallel to each other, and the first frame 41. And a second frame 42 that spans the ends. A guide roller 43 that protrudes in the horizontal direction is rotatably supported on the first frame 41. Two guide rollers 43 are provided before and after the first frame 41 and roll on the roller rolling surface 33 a of the rack rail 2.

  The first frame 41 of the conveyor 20 is provided with retractable feed claws 44 at predetermined intervals, and each feed claw 44 is configured to be swingable by a shaft portion 46 fixed to the first frame. Since the lower end side of the feed claw 44 is heavy, the feed claw 44 can be returned to the protruding state by its own weight. Furthermore, the frame body 40 is connected to a rotating plate 48 that rotates eccentrically by a motor 47, and the frame body 40 reciprocates once each time the rotating plate 48 makes one rotation (see FIG. 2).

  When the frame 40 of the conveyor 20 moves forward, the rack 4 moves forward with the tip of the feed claw 44 hooked on the crosspiece on the bottom side of the rack 4, and when the conveyor 20 moves backward, the position of the rack 4 is increased. Is maintained, and only the feed claw 44 is retracted while sinking into the frame body 40. Thereafter, when the frame body 40 moves forward, the feed claw 44 protruding from the frame body 40 is caught by the crosspiece at the bottom of the rack 4 and the rack 4 is moved forward. By repeating such an operation, the rack 4 can be sent by a predetermined pitch.

  As shown in FIGS. 2 and 5, the conveyor type dishwasher 1 is disposed on the upstream side of the cleaning nozzles 14 and 15 in the rack transport direction and detects the passage of the rack 4 for cleaning. It has a detection switch 50A, and a rinsing rack detection switch 50B that is arranged upstream of the rinsing nozzles 21 and 22 in the rack transport direction and detects the passage of the rack 4 for rinsing. The cleaning rack detection switch 50A and the rinsing rack detection switch 50B have the same configuration, and in the following description, the cleaning rack detection switch 50A will be described as a representative example.

  The rack detection switch 50A comes into contact with the bottom surface 4a of the side frame 4A of the rack 4 and descends, and when not in contact with the bottom surface 4a of the side frame 4A of the rack 4, it is more than the rack sliding surface 31a of the rack rail 2. An oscillating plate (elevating member) 51 that protrudes upward and a detection unit 52 that detects elevating of the oscillating plate 51 are provided.

  As shown in FIGS. 5 to 7, the swing plate 51 swings in a vertical plane around a rotation shaft 53 fixed to the side plate 32 of the rack rail 2. The swing plate 51 has a first hanging plate portion 54 extending in parallel with the side plate 32 of the rack rail 2, and the first hanging plate portion 54 has a shaft hole for allowing the rotary shaft 53 to pass therethrough. 54a is formed. The first drooping plate portion 54 protrudes from an opening 56 having a long hole shape formed in the rack sliding surface 31 a of the rack rail 2.

  The swing plate 51 has a protruding portion H that protrudes from the opening 56 of the rack rail 2 when swinging. The protruding portion H extends in the width direction of the rack sliding surface 31a and is formed in a trapezoidal shape. The upper plate portion 57, the first hanging plate portion 54 formed at one end in the width direction of the upper plate portion 57 in the vicinity of the edge of the opening 56, and the opening 56 at the other end in the width direction of the upper plate portion 57. The second drooping plate portion 58 is formed in the vicinity of the edge of the first drooping plate and parallel to the first drooping plate portion 54, and is formed in a U-shaped cross section.

  As described above, as a result of the protruding portion H of the swing plate 51 having a U-shaped cross section, the strength of the swing plate 51 can be increased. Furthermore, since the hanging plate portions 54 and 58 of the swing plate 51 and the edge of the opening 56 are close to each other, toothpicks and leftovers remaining on the tableware 3 and the rack 4 are dropped on the hanging plate portion of the swing plate 51. It becomes difficult to enter the gap between the edges 54 and 58 and the edge of the opening 56. As a result, a swing failure of the swing plate 51 is difficult to occur, and a detection failure of the rack 4 can be eliminated. Further, since the upper plate portion 57 is widened, it is easy to cope with the lateral displacement of the rack 4 on the rack rail 2 and detection failure can be avoided.

  Further, the swinging plate 51 has a heavy portion corresponding to the weight of the pendulum. That is, the magnet 60 is fixed to the first drooping plate portion 54 of the swing plate 51 by a bolt 59 and a nut 61 at a portion corresponding to the weight of the pendulum. In the portion corresponding to the weight of the pendulum, the rectangular parallelepiped magnet 60 is supported by a magnet support piece 54b bent at a right angle from the lower side 54d of the first hanging plate portion 54 of the swing plate 51, and the bolt 59 is attached. The magnet 60 is prevented from rotating in the center, and the magnet 60 can be held stably.

  When such a configuration is adopted, the swing plate 51 can be returned to its original position by its own weight without using an elastic member such as a spring or a hinge. Therefore, the durability can be increased without complicating the structure, which contributes to cost reduction. In addition, the magnet 60 can be used as a weight, and the complexity of the structure can be easily avoided.

  Further, when the swing plate 51 is not in contact with the bottom surface 4 a of the rack 4, the magnet support piece 54 b of the swing plate 51 comes into contact with the roller rolling surface 33 a of the rack rail 2. The upper limit of the protruding amount of the protruding portion H is specified. When such a configuration is adopted, the rotation of the swing plate 51 can be restricted by effectively utilizing the roller rolling surface 33a of the rack rail 2. This eliminates the need for providing a separate stopper portion and contributes to simplification of the structure and cost reduction.

  Further, the shaft hole 54 a of the first drooping plate portion 54 is located closer to the protruding portion H side of the swing plate 51 than the position of the center of gravity of the first drooping plate portion 54. The distance from the center to the center of the magnet 60 can be increased, and the moving distance of the magnet 60 can be increased. Therefore, the possibility of erroneous detection by the detection unit 52 can be reduced.

  As shown in FIGS. 7 to 9, the detection unit 52 of the rack detection switch 50 </ b> A is a magnetic sensor that detects the magnetism of the magnet 60. The detector 52 is housed in a tube 63 for waterproofing, the base end of the tube 63 is fixed to the lower housing 7b, and the tip of the tube 63 swings in a vertical plane. It is installed at a position where it can approach and separate. Therefore, as shown in FIG. 8, the magnetic sensor 52 disposed in the tip of the tube 63 has a magnet when the protruding portion H of the swing plate 51 reaches the maximum protruding amount, that is, when the rack is not detected. The contact is turned off at a distance from 60. As shown in FIG. 9, when the protruding portion H of the swing plate 51 reaches the minimum protruding amount, that is, in the rack detection state, the magnetic sensor 52 approaches the magnet 60 and turns on the contact. The fact that the magnetic sensor 52 is turned on / off is recognized by the microcomputer and used for controlling the washing pumps P1, P2 and the rinsing pump P3. The magnetic sensor 52 is a reed switch whose contact is turned on when the magnet 60 approaches.

  In addition, the lower limit of the protruding amount of the protruding portion H is defined by the upper side 54 c positioned on the upstream side of the protruding portion H contacting the back surface of the upper plate 31 in the first hanging plate portion 54 of the swing plate 51. Is done. Since the protruding end R of the swing plate 51 protrudes from the opening 56 by the minimum protruding amount L, even if the protruding end R is in contact with the bottom surface 4a of the rack 4 and is lowered, the rack sliding surface 31a. It will be located higher.

  When such a configuration is adopted, when the bottom surface 4a of the rack 4 sliding on the rack sliding surface 31a reaches the opening 56 on the rack sliding surface 31a, the rack slide is caused by the protruding end R of the swing plate 51. Since the rack 4 is lifted so as to float from the moving surface 31a, the rack 4 can be prevented from being caught by the downstream edge of the opening 56, and the bottom surface 4a of the rack 4 can be prevented from being scraped or damaged.

  The upper plate portion 57 of the swing plate 51 extends obliquely downward toward the upstream side, whereby the protruding portion H of the swing plate 51 swings the rack 4 without hindering the movement of the rack 4. It can be moved smoothly on the plate 51, and the upper plate portion 57 can be smoothly pressed by the rack 4.

  The swing plate 51 is disposed on the upstream side of the cleaning nozzles 14 and 15, and the opening 56 is expanded on the downstream side of the protruding end R of the swing plate 51. Through this extended portion A, the spray water from the cleaning nozzle 14 positioned above is applied to the rotating shaft 53 that supports the swinging plate 51 in the protruding state (see FIG. 8). Since the rocking plate 51 is U-shaped so that the rotating shaft 53 can be seen from the protruding end R side, the spray water can be applied to the rotating shaft 53 through the line-of-sight portion B (see FIG. 6).

  As described above, since the opening 56 is expanded on the downstream side of the protruding end R of the swing plate 51, the spray water can be easily guided to the inner side of the rack rail 2 through the expanded portion A and the line-of-sight portion B. it can. As a result, the spray water easily hits the rotary shaft 53 located on the inner side of the rack rail 2 and the amount of spray water applied to the rotary shaft 53 can be increased. Thus, the leftovers temporarily adhere to the rotating shaft 53 and can be automatically washed away by the jet water. This makes it difficult for the swing plate 51 to malfunction, and by providing the extended portion A in the opening 56, the rotary shaft 53 can be easily confirmed during maintenance, and a rod or the like can be easily inserted from the expanded portion A. It is easy to clean the deposits accumulated on the rotary shaft 53.

  The conveyor type dishwasher 1 having such a configuration enables the rack 4 to be detected by the swing plate 51 using the rack sliding surface 31 a extending on the upper surface of the rack rail 2. The swing plate 51 comes into contact with the bottom surface 4a of the rack 4 and descends, and protrudes above the rack sliding surface 31a when not in contact with the bottom surface 4a of the rack 4. Therefore, unless the rack 4 is removed from the rack rail 2 due to an unforeseen situation, the bottom surface 4a of the rack 4 being conveyed continues to be in sliding contact with the rack sliding surface 31a. The certainty of the passage detection of the rack 4 can be improved.

  Next, the operation of the conveyor type dishwasher 1 will be briefly described with reference to FIG.

  The rack 4 in which the tableware 3 before washing is set is pushed into the washing room S of the conveyor type dishwasher 1 from the entrance side, and the swing plate 51 of the washing-side rack detection switch 50A is moved by the rack 4 in the rack 4. When pressed down, the switch 50A is turned ON. As a result, the cleaning pump P1 communicating with the upper cleaning nozzle 14 is turned on, and the cleaning pump P2 communicating with the lower cleaning nozzle 15 is turned on after a predetermined time (about 0.5 seconds). Such a delay time is to prevent the dishes from being blown upward by the wash water.

  Subsequently, the motor 47 for driving the conveyor 20 is turned on, and the feed claw 44 pushes the rack 4, so that the rack 4 is conveyed toward the outlet side along the rack sliding surface 31 a of the rack rail 2. . Then, the tableware 3 on the rack 4 is continuously cleaned by the cleaning nozzles 14 and 15.

  Thereafter, when the rack 4 pushes down the swing plate 51 of the rack detection switch 50B on the rinsing side, the switch 50B is turned ON. As a result, the rinsing pump P3 is turned on, and the rack 4 is conveyed by the conveyor 20, while the tableware 3 is rinsed by the rinsing nozzles 21 and 22, and the rack 4 is unloaded from the outlet side of the dishwasher 1.

  The motor 47 of the conveyor 20 stops when both the cleaning pumps P1, P2 and the rinsing pump P3 are stopped. Even if the cleaning-side rack detection switch 50A is turned OFF, the cleaning pumps P1 and P2 continue to operate for a predetermined time (for example, 30 seconds), and even if the rinsing-side rack detection switch 50B is OFF, the predetermined time ( For example, the rinsing pump P3 continues to operate for 15 seconds. The length of the predetermined time is set as a length sufficient for the rack 4 to move in the washing section or the rinsing section.

  It goes without saying that the present invention is not limited to the embodiment described above.

  As shown in FIG. 11, the other rack detection switch 70 includes a swing plate (elevating member) 51 that performs a pendulum motion even when a magnet is not fixed, and a first hanging plate portion 54 of the swing plate 51. The locking piece 54e protrudes in the horizontal direction, and includes a micro switch (detection unit) 71 that is fixed to the rack rail 2 and has a sensing lever 71a that engages with the locking piece 54e. A roller 71b that comes into contact with the locking piece 54e is provided at the tip of the sensing lever 71a that turns the micro switch 71 on and off.

  As indicated by the two-dot chain line, when the upstream side of the swing plate 51 is released from the rack 4 and the sensing lever 71a is lowered, the micro switch 71 is turned off. As indicated by the solid line, when the upstream side of the swing plate 51 is raised by the pressing of the rack 4, the sensing lever 71a is raised by the locking piece 54e, so that the micro switch 71 is turned on. The rack detection switch 70 has a simple configuration.

  Further, as shown in FIG. 12, the other rack detection switch 80 supports a push button (elevating member) 82 protruding and retracting from an opening 81 formed in the rack sliding surface 31 a of the rack rail 2 and the push button 82. A compression coil spring 83, an arm 84 extending in an L shape from the base end of the push button 82, a magnet 85 provided at the tip of the arm 84, and a magnetic sensor (detection unit) 86 that detects the magnetism of the magnet 85. Become. The compression coil spring 83 is disposed in a cylindrical spring accommodating portion 87 fixed to the lower plate 33 of the rack rail 2 in order to expand and contract stably. Further, the arm 84 functions as a stopper by hitting the upper plate 31 of the rack rail 2.

  As indicated by the solid line, when the push button 82 released from the rack 4 is raised by the spring force, the magnet 85 is separated from the magnetic sensor 86 and the magnetic sensor 86 is turned off. As indicated by the two-dot chain line, when the push button 82 is lowered by the pressing of the rack 4, the magnet 85 and the magnetic sensor 86 approach each other, and the magnetic sensor 86 is turned on. The rack detection switch 80 has a simple configuration.

  The rack detection switches 50A, 50B, 70, 80 described above may detect only when the rack 4 arrives or passes.

  DESCRIPTION OF SYMBOLS 1 ... Conveyor type dishwasher, 2 ... Rack rail, 3 ... Tableware, 4 ... Rack, 4a ... Bottom of rack, 14, 15, 21, 22 ... Injection nozzle, 20 ... Conveyor, 31a ... Rack sliding surface, 33a ... Roller rolling surface, 40 ... Frame, 43 ... Guide roller, 44 ... Feed claw, 51 ... Oscillating plate (elevating member), 52 ... Magnetic sensor (detector), 53 ... Rotating shaft, 54, 58 ... Drop Plate part 56 ... Opening, 57 ... Upper plate part, 60 ... Magnet, S ... Cleaning chamber, A ... Expansion part of opening, R ... Protruding end, H ... Protruding part.

Claims (7)

In the conveyor type dishwasher that cleans the tableware with the spray water of the spray nozzle while transporting the tableware accommodated in the rack along the rack rail extending in the cleaning chamber by the conveyor,
An elevating member that descends in contact with the bottom surface of the rack and protrudes upward from a rack sliding surface extending on the top surface of the rack rail when not in contact with the bottom surface of the rack;
A detection unit that detects elevation of the elevating member ,
The conveyor type dishwasher , wherein the elevating member is a swing plate that swings in a vertical plane around a rotation axis fixed to the rack rail .   The projecting end of the elevating member that can project from the opening formed in the rack sliding surface is located above the rack sliding surface even when it is in contact with the bottom surface of the rack and lowered. The conveyor type dishwasher according to claim 1, wherein: Before KiYurado plate conveyor dishwasher according to claim 1 or 2, characterized in that it heavier portion corresponding to the weight of the pendulum.   4. The conveyor type dishwasher according to claim 3, wherein a magnet is fixed to a portion corresponding to the weight of the pendulum, and the detection unit is a magnetic sensor that detects magnetism of the magnet. The conveyor reciprocating back and forth along the rack rail is
A frame that extends along the rack rail and from which the feed claw projects;
A guide roller that protrudes horizontally from the frame and abuts against the rack rail,
The rack rail is provided with a roller rolling surface extending in parallel with the rack sliding surface,
5. The portion of the swing plate corresponding to the weight of the pendulum contacts the roller rolling surface when the swing plate is not in contact with the bottom surface of the rack. Conveyor type dishwasher as described in. The protruding portion of the swing plate that can protrude from the opening formed in the rack sliding surface includes an upper plate portion extending in the width direction of the rack sliding surface and both ends in the width direction of the upper plate portion. The conveyor type dishwasher according to any one of claims 1 to 5, wherein a hanging plate portion formed in the vicinity of an edge of the opening is formed in a U-shaped cross section. The swing plate that can project from an opening formed in the rack sliding surface is located upstream of the spray nozzle in the rack transport direction, and the opening is the projecting end of the swing plate in the rack transport direction. The downstream side is expanded,
Through extension of the opening, the injection water from the injection nozzle positioned above is, any claim 1-6, characterized in that rests on the said rotary shaft for supporting the swing plate protruding state A conveyor type dishwasher according to claim 1.

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