JP2008189091A - Two-step type carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-step type carriage capable of reducing a time and labor for setting and releasing a fixing device and preventing the setting of the fixing device from being forgotten. <P>SOLUTION: This carriage is constituted of an inner carriage 2 and an outer carriage 1. The outer carriage 1 is provided with an operation shaft 6 having an outer carriage side connecting tool 7 and a fulcrum shaft 9 at a tip and an intermediate part, respectively, and the fixing device 11 for the inner carriage having an inner carriage stopper piece 14 moving by interlocking with the operation shaft 6. In a treatment tank, a treatment tank side connecting tool 10 connected to the outer carriage connecting tool 7 is provided. By moving the operation shaft 6 in a direction for connecting the outer carriage side connecting tool 7 and the treatment tank side connecting tool 10, the outer carriage side connecting tool 7 and the treatment tank side connecting tool 10 are connected, and the inner carriage stopper piece 14 is retreated to release the fixing of the inner carriage. By moving the operation shaft 6 in a direction for moving the outer carriage side connecting tool 7 away from the treatment tank side connecting tool 10, the outer carriage side connecting tool 7 and the treatment tank side connecting tool 10 are separated, and the inner carriage stopper piece 14 is advanced to fix the inner carriage 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention comprises an inner cart for carrying in / out a workpiece in a state where the workpiece is placed when the workpiece is carried into / out of the treatment tank, and an outer cart for carrying the inner cart. It relates to a two-stage cart.

  As described in Japanese Patent No. 3369727, when storing a processed object in a processing tank in order to heat sterilize prepackaged food such as retort food, the processed object is put on a carriage. It is carried into the processing tank as it is. In this case, the carriage uses a two-stage carriage consisting of an inner carriage and an outer carriage. The objects to be processed are arranged in a tray, and the tray containing the objects to be processed is placed on the inner carriage. In a heat sterilizer that performs batch processing, in order to store a large amount of objects to be processed in the treatment tank at a time, multiple trays with the objects to be processed are stacked on the inner cart, and the entire inner cart is processed. It pushes into the tank. Since the treatment tank entrance is at a position higher than the floor surface, an outer carriage having the same height as the treatment tank entrance is prepared, and the inner carriage is carried on the outer carriage. In this case, the outer trolley is provided with a fixing device for the outer trolley such as a wheel brake and a floor lock so that the outer trolley does not move when the inner trolley is accommodated in the processing tank or removed from the processing tank. . In addition, when an inner carriage is placed on the outer carriage, an inner carriage fixing device such as a retaining pin is provided to prevent the inner carriage from moving on the outer carriage. Furthermore, a stopper for blocking the movement of the inner cart is provided on the processing tank to prevent the inner cart from moving freely when the inner cart is accommodated in the processing tank.

For this reason, when storing the object to be processed in the treatment tank, the outer carriage is first fixed to the outer carriage with a fixing device for the outer carriage with the outer carriage brought to the opening of the treatment tank. In addition, it is necessary to perform a three-step operation of releasing the inner cart fixing device that fixes the inner cart to the outer cart and further releasing the stopper in the treatment tank. The operation of setting and releasing the fixing device (stopper) is also necessary when the workpiece is taken out and must be performed every time, so that workability is deteriorated. Even if a fixing device is attached, the set may be forgotten. For example, if you forget to fix the outer carriage and move the inner carriage without fixing the outer carriage, the outer carriage will move freely and the outer carriage will move. And the treatment tank opens, and the wheels of the inner carriage may fall into the gap between the outer carriage and the treatment tank. When the wheel falls, there is a problem that workability is further deteriorated because it takes time to recover.
Japanese Patent No. 3369727

  The problem to be solved by the present invention is to set and release a fixing device (stopper) when carrying in / out an object to be treated in a treatment tank by a two-stage carriage comprising an inner carriage and an outer carriage. It is to provide a two-stage cart that can reduce labor and reduce labor and prevent forgetting to set a fixing device.

  The invention according to claim 1 is a two-stage cart comprising an inner cart for carrying in and out of the processing tank with an object to be treated and an outer cart for carrying the inner cart. The outer carriage is provided with an operation shaft made of a rod-like member extending from the rear of the outer carriage to the front of the outer carriage. The part is provided with a fulcrum shaft that is fixed so that the end of the operation shaft can be moved by a certain angle, and the processing tank is paired with the outer cart connection tool and connected to the outer cart side connection tool. The outer tank is connected to the operating shaft, and the other side end is used as an inner cart stopper piece in conjunction with the movement of the operating shaft to fix the inner cart. A fixing device for the inner cart that releases the lock is provided, and the outer cart is placed close to the treatment tank. And moving the operation shaft in a direction to engage the outer trolley side connection tool with the processing tank side connection tool, thereby connecting the outer trolley side connection tool and the processing tank side connection tool and retreating the inner trolley stopper piece. Unlock the inner carriage and move the operating shaft in a direction to move the outer carriage side connection tool away from the treatment tank side connection tool to separate the outer carriage side connection tool and the treatment tank side connection tool, and to remove the inner carriage stopper piece. The inner carriage is fixed by moving forward.

  The invention according to claim 2 is a two-stage cart comprising an inner cart for carrying in and out of the processing tank with an object to be treated and an outer cart for carrying the inner cart. The outer carriage is provided with an operation shaft made of a rod-like member extending from the rear of the outer carriage to the front of the outer carriage. The part is provided with a fulcrum shaft that is fixed so that the end of the operation shaft can be moved by a certain angle, and the processing tank is paired with the outer cart connection tool and connected to the outer cart side connection tool. The treatment tank side connector is provided, and the treatment tank is provided with a stopper in the treatment tank for preventing the inner carriage from coming out of the treatment tank, and the stopper in the treatment tank is normally moved by the inner carriage. While applying the stopper release force to the stopper in the processing tank The effect of the stopper in the waste treatment tank is released, and in a state where the outer carriage is brought close to the treatment tank, by moving the operation shaft in a direction to engage the outer carriage side connection tool with the treatment tank side connection tool, The outer carriage side connector and the processing tank side connector are connected, and the stopper release force is applied to the stopper in the processing tank, and the operation shaft is moved away from the processing tank side connector. By moving the outer trolley side connecting tool and the processing tank side connecting tool, the processing tank stopper is configured to be effective.

  The invention according to claim 3 is the two-stage cart, wherein the treatment tank side connector has a function as a stopper in the treatment tank for preventing the inner carriage from coming out of the treatment tank. The effect of the stopper in the processing tank is released only while the stopper releasing force in the processing tank is applied to the tank side connector, and the outer cart side connection is made in a state where the outer carriage is brought close to the processing tank. By moving the operating shaft in the direction to engage the tool with the processing tank side connection tool, the outer cart side connection tool and the processing tank side connection tool are connected, and the processing tank stopper release force is applied to the processing tank side connection tool. By moving the operation shaft in a direction away from the processing tank side connection tool, the outer cart side connection tool and the processing tank side connection tool are separated, and the stopper in the processing tank is effective. Want to occur It is characterized in.

  With one operation, you can fix the outer trolley, release the inner trolley, and release the stopper in the processing tank. With one operation, you can release the outer trolley, fix the inner trolley, and set the stopper in the processing tank. Time and effort can be reduced, and workability can be improved. In addition, if the outer carriage is not fixed, the inner carriage cannot be carried into or out of the treatment tank. If the outer carriage is released, the inner carriage is fixed and the stopper in the treatment tank is automatically set. Therefore, the work is not carried out without forgetting the necessary set of fixing devices.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a two-stage carriage for carrying out the present invention, FIG. 2 is an operation explanatory view of a fixing device provided in the outer carriage, and FIG. 3 is an explanation of a connection state between the outer carriage side connector and the processing tank side connector. FIG. 4 and FIG. 4 are explanatory diagrams of the connection status of the outer cart side connection tool and the processing tank side connection tool in the second embodiment. In the present embodiment, an example in which the present invention is implemented in a heat sterilizer that sterilizes a packaged food under high temperature and high pressure will be described. The heat sterilization apparatus has a cylindrical processing tank 4 and performs sterilization by heating and pressurizing the inside of the processing tank 4 in a state in which the workpiece 3 is accommodated in the processing tank 4. In the heat sterilization apparatus, the objects to be processed 3 are arranged on the tray 13, and the trays 13 on which the objects to be processed 3 are arranged are stored in the processing tank 4 in a stacked state, and the door (not shown) is closed and processed. The inside of the tank 4 is sealed. Since it is more efficient to put the tray 13 in and out of the processing tank 4 in a state where the trays are stacked, the tray 13 is stacked on the inner carriage 2 and the whole inner carriage 2 is accommodated in the processing tank 4. I have to. Since the bottom surface in the treatment tank 4 is higher than the floor surface, the inner carriage 2 is a two-stage carriage that is transported by an outer carriage 1 that has the same height as the bottom of the treatment tank. Since the inner cart 2 is accommodated in the processing tank 4, the inner cart 2 is simply configured with the inner cart wheel 5 attached thereto, and the outer cart 1 is not accommodated in the processing tank 4. A handle 12 is provided at the rear end to facilitate movement.

  The outer cart 1 is provided with an outer cart fixing device that prevents the outer cart 1 from moving when the inner cart 2 is taken into and out of the treatment tank. An operation shaft 6 of a rod-shaped member that extends from the rear part of the outer carriage on the handle 12 side of the outer carriage to the front part of the outer carriage is provided, and an outer carriage-side connector 7 is provided at the tip of the operation shaft 6. The operation shaft 6 is a fulcrum shaft for fixing the operation shaft handle portion 8 to the operation shaft root portion and the operation shaft to an intermediate portion of the operation shaft, and for allowing the end portion of the operation shaft to rotate on a horizontal plane by a predetermined angle. 9 is provided. By moving the operation shaft handle portion 8, the outer trolley side connecting tool 7 on the diagonal side is moved with the fulcrum shaft 9 interposed therebetween.

  The processing tank side connection tool 10 is provided in the part where the outer cart side connection tool 7 of the processing tank 4 comes. The outer trolley side connection tool 7 and the processing tank side connection tool 10 have a paired shape, and the outer trolley side connection tool 7 and the processing tank side connection tool 10 are connected by being engaged with each other. Here, the outer trolley side connection tool 7 has a horizontal hook shape, and the treatment tank side connection tool 10 has a bar shape extending in the vertical direction, and the treatment tank side connection tool 10 is hooked by the outer trolley side connection tool 7.

In addition, the processing tank 4 is provided with a processing tank stopper 15 that is arranged alongside the processing tank side connection tool 10 and prevents the inner carriage 2 from coming out of the processing tank 4 on the part where the outer truck side connection tool 7 comes. Yes.
The processing tank side connector 10 and the processing tank stopper 15 are installed at the bottom of the processing tank 4, and the opening side is the processing tank stopper 15 and the back side is the processing tank side connector 10. The treatment tank stopper 15 is composed of an upper bar-shaped portion and a lower weight portion. The stopper 15 in the processing tank is normally configured such that the bar-shaped portion extends in the vertical direction by a weight, but the rod-shaped portion of the stopper 15 in the processing tank can be tilted by applying a force in the lateral direction. Keep it as The stopper 15 in the processing tank is a position where the upper end of the stopper 15 in the processing tank is higher than the bottom of the inner carriage 2 when the rod-shaped portion is vertical, and when the rod-shaped portion is tilted, The upper end of the tank stopper 15 is set lower than the bottom of the inner carriage 2 so that the movement of the inner carriage 2 is not hindered.

  Further, an inner cart fixing device 11 for fixing the inner cart 2 is also connected to the operation shaft 6. The inner cart fixing device 11 has one end connected to a portion between the fulcrum shaft 9 of the operation shaft 6 and the operation shaft handle portion 8 so that the other end reaches the vicinity of the inner cart wheel 5. The inner cart wheel 5 is stopped by the inner cart stopper piece 14 provided at the tip on the other end side. Since one of the inner cart fixing devices 11 is connected to the operation shaft 6, the position of the inner cart stopper piece 14, which is the tip of the inner cart wheel 5, moves in accordance with the movement of the operation shaft 6. Become. When the inner cart stopper piece 14 moves forward and protrudes on the course of the inner cart wheel 5, the inner cart wheel 5 cannot move, and the inner cart 2 is fixed. When the inner carriage wheel 5 is moved backward and pulled back from the path shape, the inner carriage wheel 5 can move, so that the inner carriage 2 is unfixed.

  The operation shaft 6 is moved to the left and right by holding the operation shaft handle portion 8 so that the inclination with respect to the center line extending in the front-rear direction of the outer carriage 1 changes. The operation with the operation shaft handle portion 8 is performed while standing on the rear side (the handle 12 side) of the outer carriage 1. When the operation shaft handle portion 8 is swung to the right, the outer cart is fixed, and the operation shaft 6 is parallel to the center line of the outer cart 1. When the operation shaft handle portion 8 is swung to the left, the inner cart is fixed, and the operation shaft 6 is inclined with respect to the center line of the outer cart 1.

  When the inner carriage 2 is carried on the outer carriage 1, the operation shaft handle portion 8 is set to the inner carriage fixing side. When the operation shaft handle portion 8 is set to the inner carriage fixed side, the operation shaft 6 is inclined with respect to the center line of the outer carriage 1, and the operation shaft handle portion 8 side of the fulcrum shaft 9 is on the left side from the handle 12. The trolley shaft 9 is shifted to the right side on the outer trolley side connector 7 side. By connecting the operation shaft 6 to the inner cart fixing side, the connecting portion between the inner cart fixing device 11 and the operation shaft 6 approaches the inner cart wheel 5, so the inner cart stopper piece 14 at the tip of the inner cart fixing device is Jump out on the path of the inner bogie wheel 5. If there is an inner carriage stopper piece 14 on the path of the inner carriage wheel 5, the inner carriage 2 cannot move in the front-rear direction. In this state, even if the outer carriage 1 is moved, the inner carriage 2 moves freely. That is no longer true.

  When the outer carriage 1 is carried to the opening of the treatment tank 4 and the inner carriage 2 is accommodated in the treatment tank 4, the outer carriage 1 is fixed so that the outer carriage 1 does not move. The outer cart 1 is fixed by swinging the operation shaft handle portion 8 to the right outer cart fixing side. When the operation shaft handle portion 8 is set to the outer cart fixed side, the outer cart side connector 7 at the tip of the operation shaft 6 moves to the left side with the fulcrum shaft 9 interposed therebetween. The outer cart side connection tool 7 has a hook shape, and the processing tank side connection tool 10 connected to the outer cart side connection tool 7 is provided on the processing tank 4 side. The part sandwiches the processing tank side connector 10. When the outer trolley side connection tool 7 and the processing tank side connection tool 10 are engaged with each other, the outer trolley 1 is fixed to the processing tank 4, so that the outer trolley does not move.

  Further, when the outer cart side connection tool 7 is moved to the processing tank side connection tool 10 side, as shown in FIG. 3, in the portion where the outer cart side connection tool 7 hits the processing tank inner stopper 15, the processing tank Since it is not recessed like the side connection tool 10 part, the outer trolley side connection tool 7 applies a force to the processing tank stopper 15 in the lateral direction. The stopper 15 in the processing tank is configured to tilt so that a lateral force is applied. By moving the operating shaft handle portion 8 to a position where the outer truck is fixed, the outer cart-side connector 7 pushes the stopper 15 in the processing tank and the processing tank. The inner stopper 15 tilts.

  Further, when the operation shaft handle portion 8 is moved to the outer cart fixing position, the inner cart stopper piece 14 at the tip is pulled inward in the inner cart fixing device 11 having one end connected to the operation shaft 6. become. When the stopper 15 in the processing tank is tilted and the inner cart stopper piece is pulled in, there is nothing to block the inner cart 2 from entering the processing tank 4, so the inner cart 2 is carried into the processing tank 4. be able to. In other words, unless the outer cart side connector 7 and the processing tank side connector 10 are connected, the inner carriage 2 is not fixed and the processing tank stopper 15 is not released. Cannot be carried into 4. Therefore, moving the inner carriage 2 without forgetting to fix the outer carriage 1 does not occur.

  When the inner carriage 2 is accommodated in the processing tank 4, the operation shaft handle portion 8 is moved to the inner carriage fixing side. By setting the operation shaft handle portion 8 to the inner cart fixed side, the outer cart side connector 7 is detached from the processing tank side connector 10, and the outer cart 1 can be moved. Further, when the outer cart side connector 7 is separated from the processing tank stopper 15, the processing tank stopper 15 returns to the vertical state. When the processing tank stopper 15 is vertical, the movement of the inner cart 2 accommodated in the processing tank 4 is blocked, and the inner cart 2 can be fixed in the processing tank 4.

  Thereafter, the door of the processing tank 4 is closed, and the processing tank 4 is sterilized by setting the inside of the processing tank 4 to high temperature and high pressure. When the processing in the processing tank 4 is completed, the door of the processing tank 4 is opened again and the workpiece 3 is taken out. Also in this case, the outer cart 1 is brought to the opening of the processing tank 4 and the operation shaft handle portion 8 is set to the outer cart fixed side. By fixing the outer carriage, the effect of the stopper 15 in the processing tank is released at the same time as the outer carriage 1 is fixed, so that the inner carriage 2 can be taken out from the processing tank 4 and placed on the outer carriage 1.

  When the inner carriage 2 is put on the outer carriage 1, the operation shaft handle portion 8 is set to the inner carriage fixing side. When the inner carriage is fixed, the inner carriage stopper piece 14 comes out on the course of the inner carriage wheel 5, so that the inner carriage 2 is fixed on the outer carriage 1. At the same time, since the outer cart-side connector 7 is detached from the processing tank-side connector 10, the fixing of the outer cart 1 is released, and the outer cart 1 can be moved. Also in this case, since the outer cart 1 cannot be moved unless the inner cart 2 is fixed, it is not possible to move the outer cart 1 without fixing the inner cart 2.

  In the second embodiment shown in FIG. 4, the treatment tank side connector 10 has a function as a treatment tank side connector, and in addition, the treatment tank prevents the inner cart 2 from coming out of the treatment tank 4 without permission. A function as the inner stopper 15 is also provided. In the above embodiment, the processing tank side connector 10 and the processing tank stopper 15 are arranged side by side in the front-rear direction. However, in the second embodiment, the processing tank side connector 10 functions as the processing tank stopper 15. Only the processing tank side connector 10 is provided to have both, and the other parts are the same as those in the above embodiment. The processing tank side connection tool 10 is provided in the bottom part of the processing tank 4, and consists of a rod-shaped part and a weight part. The processing tank side connection tool 10 is normally set so that the bar-shaped portion extends in the vertical direction by the weight, but the bar shape portion of the processing tank side connection tool 10 is tilted to a predetermined angle by applying a force in the lateral direction. The structure can be made to be allowed. When the rod-shaped portion is vertical, the processing tank-side connector 10 is located at a position where the upper end of the processing tank-side connector 10 is higher than the bottom of the inner carriage 2 and tilts the rod-shaped portion. Is provided at a position where the upper end of the processing tank side connector 10 is lower than the bottom of the inner carriage 2 and does not hinder the movement of the inner carriage 2.

  In the second embodiment, when the inner carriage 2 is accommodated in the treatment tank 4, the outer carriage 1 is fixed so that the outer carriage 1 does not move as in the above embodiment. The outer cart 1 is fixed by swinging the operation shaft handle portion 8 to the right outer cart fixing side, and the outer cart side connector 7 and the processing tank side connector 10 are connected in the same manner as in the above embodiment. is there. However, as shown in FIG. 4, the processing tank side connector 10 is configured to tilt when a lateral force is applied, and when the operation shaft handle portion 8 is moved to a position where the outer carriage is fixed, the outer carriage side Since the connecting tool 7 pushes the processing tank-side connecting tool 10, the processing tank-side connecting tool 10 tilts. When the processing tank side connection tool 10 is tilted to a predetermined angle, the processing tank side connection tool 7 is prevented from further tilting, and the outer cart side connection tool 7 is connected to the tilted processing tank side connection tool 10.

  Therefore, when the operation shaft handle portion 8 is moved to the outer carriage fixing position, the processing tank side connection tool 10 is tilted and the inner carriage stopper piece is also drawn, so that the inner carriage 2 enters the processing tank 4. There is no obstruction, and the inner carriage 2 can be carried into the treatment tank 4. When the inner carriage 2 is accommodated in the processing tank 4, the operation shaft handle portion 8 is moved to the inner carriage fixing side. By setting the operation shaft handle portion 8 to the inner cart fixed side, the outer cart side connector 7 is detached from the processing tank side connector 10, and the outer cart 1 can be moved. Further, when the outer cart side connector 7 is detached from the processing tank side connector 10, the processing tank side connector 10 returns to the vertical state. When the processing tank side connector 10 is vertical, the movement of the inner cart 2 accommodated in the processing tank 4 is blocked, and the inner cart 2 can be fixed in the processing tank 4. By providing the processing tank side connector 10 with the function as the processing tank stopper 15, it is not necessary to provide the processing tank stopper 15 separately from the processing tank side connector 10, thereby reducing the number of devices.

  If the two-stage carriage of the present invention is used, the outer carriage 1 can be fixed, the inner carriage 2 can be fixed and the processing tank stopper can be released simply by operating the operating shaft handle portion 8 to the fixed side of the outer carriage. Since the outer carriage 1 can be unfixed, the inner carriage 2 can be fixed, and the processing tank stopper can be set only by setting the inner carriage fixed side, the working efficiency can be improved. In addition, if you forgot to fix the outer carriage 1, you cannot move the inner carriage 2, and if you forgot to fix the inner carriage 2, you cannot move the outer carriage 1, so you forgot to fix it. By proceeding with the work as it is, it is no longer that an unintended failure occurs and work efficiency is reduced.

Schematic diagram of a two-stage cart embodying the present invention Operational illustration of the fixing device provided on the outer carriage Explanatory diagram of connection status between outer cart side connector and treatment tank side connector Explanatory drawing of the connection situation of the outer trolley side connection tool and the treatment tank side connection tool in the second embodiment

Explanation of symbols

1 outside cart
2 Inner truck
3 Workpiece
4 treatment tank
5 Wheel for inner bogie
6 Operation axis
7 Outer truck side connector
8 Operation axis handle
9 fulcrum shaft
10 Treatment tank side connector
11 Inner truck fixing device 12 Handle
13 trays
14 Inner trolley stopper piece 15 Treatment tank stopper

Claims (3)

  A two-stage cart consisting of an inner cart for carrying in and out of the processing tank with an object to be treated and an outer cart for transporting the inner cart, the outer cart being an outer cart An operating shaft made up of a rod-shaped member extending from the rear to the front of the outer carriage is provided, with the outer carriage-side connector at the front end of the outer carriage and the end of the operating shaft at the middle of the operating shaft. A fixed fulcrum shaft is provided so that it can be moved by a certain angle, and the treatment tank side connection tool configured to be coupled with the outer carriage side connection tool is paired with the outer carriage connection tool in the treatment tank. The inner carriage fixing device for fixing and releasing the inner carriage by connecting the outer carriage to the operation shaft and having the other side end as an inner carriage stopper piece in conjunction with the movement of the operation shaft. In the state where the outer cart is close to the treatment tank, the outer cart side connection By moving the operating shaft in the direction that engages the treatment tank side connection tool, the outer carriage side connection tool and the treatment tank side connection tool are coupled, and the inner carriage stopper piece is retracted to release the inner carriage from being fixed. By moving the operating shaft in a direction to move the outer cart side connector away from the processing tank side connector, the outer cart side connector and the processing tank side connector are separated, and the inner cart stopper piece is advanced to fix the inner cart. A two-stage trolley characterized by the above-mentioned structure.   A two-stage cart consisting of an inner cart for carrying in and out of the processing tank with an object to be treated and an outer cart for transporting the inner cart, the outer cart being an outer cart An operating shaft made up of a rod-shaped member extending from the rear to the front of the outer carriage is provided, with the outer carriage-side connector at the front end of the outer carriage and the end of the operating shaft at the middle of the operating shaft. A fixed fulcrum shaft is provided so that it can be moved by a certain angle, and the treatment tank side connection tool configured to be coupled with the outer carriage side connection tool is paired with the outer carriage connection tool in the treatment tank. In addition, the processing tank is provided with a stopper in the processing tank that prevents the inner cart from coming out of the processing tank, and the stopper in the processing tank is normally closed to block the movement of the inner cart, The effect of the stopper in the treatment tank is only applied while the stopper release force is applied to the stopper. In the state where the outer carriage is brought close to the treatment tank, the operation shaft is moved in a direction to engage the outer carriage-side connection tool with the treatment tank-side connection tool. By connecting the tank side connector and applying a stopper releasing force to the stopper in the processing tank, and moving the operating shaft in a direction away from the processing tank side connector, the outer carriage A two-stage carriage characterized in that the side connection tool and the processing tank side connection tool are separated, and the stopper in the processing tank is effective.   The two-stage trolley according to claim 2, wherein the processing tank side connector has a function as a stopper in the processing tank for preventing the inner cart from coming out of the processing tank, On the other hand, the effect of the stopper in the processing tank is canceled only while the stopper release force in the processing tank is applied. In the state where the outer carriage is brought close to the processing tank, the outer cart side connection tool is connected to the processing tank side. By moving the operating shaft in the direction to engage with the connection tool, the outer cart side connection tool and the processing tank side connection tool are coupled, and the processing tank stopper release force is applied to the processing tank side connection tool. By moving the operating shaft in a direction to move the outer cart side connector away from the processing tank side connector, the outer cart side connector and the processing tank side connector are separated, and the stopper in the processing tank is effective. It is characterized by being Two-stage truck that.

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