JP2011031902A - Door mechanism for double-door type sealed container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door mechanism for a double-door type sealed container, which can open/close the front and rear doors by a single drive motor. <P>SOLUTION: The door mechanism for the double door type sealed container is configured such that a container body having a front opening and a rear opening is opened/closed by vertically movable front and rear doors by means of a drive motor, a drive sprocket rotated and driven, and a chain driven by engaging with the sprocket. In this mechanism, the front and rear doors 4 and 5 are connected together at the top of the container body 3 by means of the common chain 19. A front door guide 20 and a rear door guide 21, which guide the common chain 19, are provided at the top of the container body 3 so as to correspond to the front door 1 and rear door 2. A common drive motor 24 for driving the common chain 19 is provided, via the drive sprocket 23 that engages with the common chain 19, between the front door guide 20 and the rear door guide 21. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a door mechanism of a two-door closed container having two doors, and is mainly used for a closed container to which pressure is applied, such as a sterilizer, a vacuum cooler, and a retort device.

  As an airtight container used for the above-mentioned applications, there are openings on the front and rear of the container body, and the front door and the rear door that move by sliding these openings are opened and closed. There is a double-door closed container for taking in and out (see, for example, Patent Document 1).

  For example, as shown in FIGS. 7 and 8, the conventional double door type closed container has a front surface corresponding to the front opening 1 and the rear opening 2 of the container body 3 having the front opening 1 and the rear opening 2. A door 4 and a rear door 5 are installed. The front door 4 and the rear door 5 have a flexible structure, and are respectively attached to the left and right sides of the container body 3 on the side of the front opening 1 and the rear opening 2 across the top of the container body 3. The front opening 1 and the rear opening 2 are opened and closed by being guided by the guide 6 and moving in the vertical direction.

Chains 7 and 8 are attached to both sides of the front door 4 and the rear door 5 along the moving direction, respectively. Each chain is meshed with a front door side drive sprocket 9 and a rear door side drive sprocket 10 provided on the top side of the container body 3, and the front door side drive sprocket 9 is driven by a front door side drive motor 11 and the rear surface. The door-side drive sprocket 10 is rotationally driven by a rear door-side drive motor 12.
When opening and closing the front opening 1 and the rear opening 2, the front opening 1 is opened and closed by driving the front door side drive motor 11 and sliding the front door 4 up and down. The part 2 is opened and closed by driving the rear door side drive motor 12 and moving the rear door 5 upward and downward.

Japanese Patent Laid-Open No. 10-101123

  However, in the above-described conventional two-door sealed container, it is necessary to prepare two drive motors, a front door side drive motor 11 and a rear door side drive motor 12, and a control circuit for each of the drive motors 11 and 12. Therefore, there is a problem that the cost is high and it is necessary to secure a space for installing the two drive motors 11 and 12.

  An object of the present invention is to provide a door mechanism of a double-door type closed container that can open and close a front door and a rear door with one drive motor.

  In order to achieve the above object, according to the first aspect of the present invention, a container body having a front opening and a rear opening is driven by meshing with a drive motor, a drive sprocket that is driven to rotate by the drive motor. The door mechanism of a double door type closed container that is opened and closed by a front door and a rear door that are moved in the vertical direction by the front and rear chains, and the front door and the rear door are mutually common on the top side of the container body The front door side guide body and the rear door side guide body for guiding the common chain are provided corresponding to the front door and the rear door on the top side of the container body, A common drive motor for driving the common chain is provided between the front door side guide body and the rear door side guide body via a drive sprocket that meshes with the common chain.

  According to a second aspect of the present invention, the drive sprocket according to the first aspect is provided with a pressing member that prevents the common chain from being detached from the drive sprocket.

  According to a third aspect of the present invention, the container body according to the first or second aspect is engaged with the front door and the rear door at a position closing the front opening and the rear opening. And a locking portion for holding the front door and the rear door at the corresponding positions.

  According to the door mechanism of the double door type closed container according to claim 1, the front door and the rear door are connected to each other on the top side of the container body by a common chain, and the common chain is connected to the top side of the container body. A front door side guide body and a rear door side guide body for guiding the front door are provided corresponding to the front door and the rear door, and the front door side guide body and the rear door side guide body mesh with a common chain. Since a common drive motor that drives a common chain via the drive sprocket is provided, the front door and the rear door are moving downward, and both the front opening and the rear opening of the container body are From the closed state, the drive sprocket is rotated in one direction by a common drive motor, and either the front door or the rear door, for example, the common chain connected to the front door is pulled to the rear door side. When driving in the direction It raised the front door open the front opening moves upward, and a common chain tensioned by the drive sprocket is held in a loose state with the rear door side guide member and drive sprocket.

From this state, when the drive sprocket is rotated in the other direction by the common drive motor and the common chain on the side connected to the rear door is driven in the direction of pulling to the front door side, first the drive sprocket and the rear door side guide The slack of the common chain that has slackened with the body is gradually eliminated, and the front door that has been lifted moves downward to close the front opening. And when the chain on the side connected to the rear door is further driven in the direction of pulling to the front door side, the rear door is pulled up and moved upward to open the rear opening and pulled by the drive sprocket. The common chain is held in a slack state between the drive sprocket and the front door side guide body.
Thus, since the front door and the rear door can be opened and closed with one common drive motor, the cost can be reduced and the space can be saved.

  According to the door mechanism of the double door type closed container according to claim 2, the drive sprocket according to claim 1 is provided with a pressing member that prevents the common chain from being detached from the drive sprocket. The common chain can be prevented from coming off the drive sprocket.

  According to the door mechanism of the two-door closed container according to claim 3, the container main body according to claim 1 or 2 includes a front door and the rear surface at a position closing the front opening and the rear opening. Since there is a locking part that locks the door and holds the front door and the rear door in this position, one of the front door or the rear door is opened to open one of the front opening or the rear opening. Even if the chain connected to the other front door or the rear door is loosened by moving upward, the other front door or the rear door closing the front opening or the rear opening is lowered by its own weight. Can be prevented.

It is a partially omitted vertical side view showing a first embodiment of a door mechanism of a double door closed container according to the present invention. It is explanatory drawing which shows the latching part which latches to the latching | locking part which latches the door mechanism front door and rear door of the double door type airtight container of FIG. It is a schematic explanatory drawing which shows the principal part of the door mechanism of the double door type airtight container of FIG. It is a schematic explanatory drawing which shows the other example of the principal part of the door mechanism of the double door type airtight container of FIG. It is explanatory drawing which shows the operation state of the door mechanism of the double door type airtight container of FIG. It is a partially-omission longitudinal side view which shows the 2nd Example of the door mechanism of the double door type airtight container which concerns on this invention. It is a partially notched front view which shows the door mechanism of the conventional double door type airtight container. FIG. 8 is a partially omitted vertical side view showing a door mechanism of the double door closed container of FIG. 7.

  Hereinafter, an example of the form for implementing the door mechanism of the double door type airtight container which concerns on this invention is demonstrated in detail with reference to drawings. Note that portions corresponding to the above-described conventional example are denoted by the same reference numerals.

  FIG. 1 to FIG. 5 show a first embodiment of a door mechanism of a double door type closed container according to the present invention, and FIG. 1 shows a partially omitted vertical side view showing the door mechanism of the double door type closed container of this example. FIG. 2 is an explanatory view showing a locking portion for holding the door mechanism front door and the rear door of the double door type closed container of this example in the lowered position, and a locking receiving portion locked to the locking portion, FIG. Is a schematic explanatory view showing the main part of the door mechanism of the double door type closed container of this example, FIG. 4 is a schematic explanatory view showing another example of the main part of the door mechanism of the double door type closed container of this example, FIG. It is explanatory drawing which shows the operation state of the door mechanism of the double door type airtight container of this example.

  As shown in FIG. 1, the door mechanism of the double door type closed container of this example corresponds to the front opening 1 and the rear opening 2 of the container body 3 having the front opening 1 and the rear opening 2. A front door 4 and a rear door 5 are installed. The front door 4 and the rear door 5 are supported on the front opening 1 and the rear opening 2 side so as to be movable in the vertical direction by guide portions 6 attached to the left and right sides of the container body 3 across the top of the container body 3. The front opening 1 and the rear opening 2 are moved upward, and the front opening 1 and the rear opening 2 are closed by moving downward under its own weight.

  The guide portion 6 described above has a configuration in which a front door guide portion 6A for guiding the front door 4 and a rear door guide portion 6B for guiding the rear door 5 are connected to each other at the top of the container body 3. Are formed with storage portions 6a and 6b for storing the front door 4 and the rear door 5 moved upward. The storage portions 6a and 6b are structured such that the stored front door 4 and rear door 5 move downward due to their own weight, and the front door 4 and the rear door 5 are pulled by a common chain described later. It is guided by the guide portion 6 and moved upward, and is guided by the guide portion 6 and moved downward by its own weight due to cancellation of pulling by a common chain.

  The front door 4 and the rear door 5 have a flexible structure. For example, a flexible thin plate member 13 made of metal such as stainless steel, and a thin plate member by welding or the like on the surface of the thin plate member 13. 13 and a large number of beam members 14 made of metal such as stainless steel arranged adjacent to each other in a direction crossing 13.

  In addition, packing grooves 15 and 16 are provided in the circumferential direction on the opposing surfaces of the front door 4 and the rear door 5 in the container main body 3 around each of the front opening 1 and the rear opening 2. , 16 are fitted with packings 17, 18 respectively. When the front door 4 and the rear door 5 are used to open and close the front opening 1 and the rear opening 2, the front door 4 and the rear door 5 moved to positions facing the front opening 1 and the rear opening 2. On the other hand, a fluid such as air is sent to the bottom side of the packing grooves 15 and 16 to pressurize the packings 17 and 18 to the back surfaces of the thin plate members 13 of the front door 4 and the rear door 5 supported by the guide portion 6. The front opening 1 and the rear opening 2 are sealed by being pressed against each other, and the bottom side of the packing grooves 15 and 16 is sucked to create a negative pressure so that the packings 17 and 18 are placed in the packing grooves 15 and 16. The packing 17 and 18 are released from the tight contact state with the thin plate member 13 by retreating the ring.

  When the front door 4 and the rear door 5 are fixed at the closed position of the front opening 1 and the rear opening 2, the front door 4 and the rear door 5 are opposed to the front opening 1 and the rear opening 2, respectively. To the proper closing position that closes the front opening 1 and the rear opening 2, this is detected by appropriate stop position detecting means (not shown), and the front door 4 and the rear door 5 are The packings 17 and 18 are pressed against and brought into close contact with the stopped front door 4 and rear door 5, and the front door 4 and rear door 5 are fixed at the proper closing position.

  The front door 4 and the rear door 5 are connected by a common chain 19 on the top side of the container body 3. In this example, both ends of the common chain 19 are attached along both side surfaces of the front door 4 and the rear door 5.

  Further, a front door side guide body 20 and a rear door side guide body 21 for guiding the common chain 19 are provided on the top side of the container body 3 so as to correspond to the front door 4 and the rear door 5. It has been. The front door side guide body 20 and the rear door side guide body 21 are provided at the corner portions of the front door guide portion 6A and the rear door guide portion 6B constituting the guide portion 6, respectively.

The front door side guide body 20 and the rear door side guide body 21 are not particularly limited as long as they can smoothly guide the common chain 19. In this example, a roller having a U-groove for engaging the common chain 19 is used. However, a sprocket can be used, or a rail that can smoothly guide the common chain 19 can be used.
In particular, when the front door side guide body 20 and the rear door side guide body 21 are sprockets, by providing a braking mechanism such as a speed reducer on the rotating shaft of the sprocket, when the common chain 19 is cut by any chance, The front door 4 and the rear door 5 can be prevented from falling rapidly due to their own weight, and safety can be achieved. In this case, the sprocket which becomes the front door side guide body 20 and the rear door side guide body 21 needs to be provided at a position that does not come off from the front door 4 and the rear door 5 that move up and down for opening and closing.

  When the front door side guide body 20 and the rear door side guide body 21 are rollers or rails, the front door 4 and the rear door 5 are separated from the front door side guide body 20 and the rear door side guide body 21. As a sudden drop prevention means, as shown in FIG. 4, it is attached along the both side surfaces of the front door 4 and the rear door 5 at a position not to be removed from the front door 4 and the rear door 5 that move up and down for opening and closing. A fall braking sprocket 22 having a braking mechanism such as a speed reducer meshing with the chain 19 may be provided.

  A common drive motor 24 is provided between the front door side guide body 20 and the rear door side guide body 21 via a drive sprocket 23 that meshes with a common chain 19. As described above, the common chain 19 that is connected to the front door 4 and the rear door 5 and meshes with the front door side guide body 20, the rear door side guide body 21, and the drive sprocket 23 is at least the front door 4 and the rear door 5. The length is set such that both of them can move downward and simultaneously close the front opening 1 and the rear opening 2. The drive splot 23 is provided with a holding member 25 that prevents the common chain 19 from being detached from the drive sprocket 23.

  Further, the front door side chain slack space 26 and the rear door side chain for loosening the common chain 19 between the front door side guide body 20 and the drive sprocket 23 and between the rear door side guide body 21 and the drive sprocket 23. A slack space 27 is provided.

  Further, as described above, the front door 4 and the rear door 5 are fixed in the closed position of the front opening 1 and the rear opening 2, and the front surface that has reached the proper closing position for closing the front opening 1 and the rear opening 2 is secured. The packings 17 and 18 are pressed against and fixed to the door 4 and the rear door 5, but when the pressing force of the packings 17 and 18 decreases, the front door 4 and the rear door 5 lower than the proper closing position. In this example, the front door 4 and the rear door 5 that are in a position to close the front opening 1 and the rear opening 2 are locked to the container body 3 when the front door 4 and the rear door 5 are about to descend. A locking portion 28 for preventing the lowering of the lever is provided. The locking portion 28 is provided so as to protrude from the lower part of each front surface of the front opening 1 and the rear opening 2 of the container body 3, and is connected to a locking receiving portion 29 provided on the left and right sides of the front door 4 and the rear door 5. The front door 4 and the rear door 5 are prevented from descending by locking.

  The locking portion 28 may be provided in a state of protruding from the lower portions of the front surfaces of the front opening 1 and the rear opening 2 of the container body 3, or the front door 4 and the rear door 5 are moved downward. When the position which closes the front surface opening part 1 and the rear surface opening part 2 is reached | attained, you may catch this with a sensor and you may provide so that the latching | locking part 28 may protrude.

  The location where the locking portion 28 is provided is not necessarily the lower part of each front face of the front face opening 1 and the rear face opening 2 of the container body 3, and is in a position where the front face opening 1 and the rear face opening 2 are closed. The front door 4 and the rear door 5 may be engaged with each other as long as the front door 4 and the rear door 5 can be held at the corresponding positions.

Next, operation | movement of the door mechanism of the double door type airtight container of this example is demonstrated in FIG.1 and FIG.5.
In FIG. 1, the front opening 1 and the rear opening 2 of the container body 3 are closed by the front door 4 and the rear door 5. That is, the front door 4 and the rear door 5 are located at positions facing the front opening 1 and the rear opening 2, and in the packing grooves 15 and 16 provided in the circumferential direction of the front opening 1 and the rear opening 2, respectively. The packings 17 and 18 pushed out by feeding fluid such as air into the bottom side of the door are in close contact with the back surface of the thin plate member 13 of the front door 4 and the rear door 5 supported by the guide portion, and the front opening 1 and the rear opening. Part 2 is in a sealed state.

  From this state, for example, as shown in FIG. 5, when opening the front opening 1, first, the bottom side in the packing groove 15 on the front opening 1 side is sucked to create a negative pressure. When the packing 17 is retreated, the contact state of the packing 17 with respect to the back surface of the thin plate member 13 of the front door 4 is released, and when the driving sprocket 23 is rotated clockwise by the common driving motor 24, the driving sprocket 23 The common chain 19 is pulled, the front door 4 is lifted and moved upward to be accommodated in the accommodating portion 6a of the front door guide portion 6A constituting the guide portion 6, and the front opening 1 is opened, and the drive sprocket The common chain 19 that has been pulled by 23 and passed through the drive sprocket 23 is provided between the drive sprocket 23 and the rear door side guide body 21. It is held in a slack state in terms door side chain slack space 27 after.

  At this time, the rear door 5 is brought into contact with the rear opening 2 by the close contact of the packing 18 pushed out by a fluid such as air sent to the bottom side in the packing groove 16 provided in the circumferential direction of the rear opening 2. Even when the packing 18 is weakly pressed and the weight of the rear door 5 cannot be supported, the locking portions 28 provided on the container body 3 are provided on the left and right sides of the rear door 5. Since the receiving portion 29 is locked and the lowering of the rear door 5 is prevented, the lowering of the rear door 5 due to its own weight is prevented.

  When closing the front opening 1 opened as described above, when the drive sprocket 23 is rotated counterclockwise by the common drive motor 24, the drive sprocket 23 and the rear door side guide body 21 are interposed between them. The common chain 19 loosened in the provided rear door side chain slack space 27 is drawn out by the drive sprocket 23, moved upward, and the front door 4 housed in the housing part 6a of the front door guide part 6A is pulled by its own weight. It moves downward and reaches a position facing the front opening 1. When the front door 4 reaches a position facing the front opening 1, fluid such as air is sent to the bottom side of the packing groove 15 to pressurize it, push out the packing 17 and press it against the back surface of the thin plate member 13 of the front door 4. The front opening 1 is tightly sealed. That is, the state shown in FIG. 1 is obtained.

  Next, although not shown in the case of opening the rear opening 2, the bottom side in the packing groove 16 on the rear opening 2 side is first sucked and negative as in the case of opening the front opening 1. When the packing sprocket 23 is rotated counterclockwise by the common drive motor 24 after releasing the contact state of the packing 18 with the back surface of the thin plate member 13 of the rear door 5 as a pressure, the common chain 19 is formed by the drive sprocket 23. The rear door 5 is pulled up and moved upward to open the rear opening 2, and the common chain 19 pulled by the drive sprocket 23 and past the drive sprocket 23 is connected to the drive sprocket 23 and the front door side guide body. The rear door side chain slack space 26 is provided in a relaxed state.

  At this time, the front door 4 is brought into contact with the front opening 1 by the close contact of the packing 17 pushed out by a fluid such as air sent to the bottom side in the packing groove 15 provided in the circumferential direction of the front opening 2. Even if the packing 17 is weakly pressed and the weight of the front door 4 cannot be supported, the engagement provided on the left and right sides of the front door 4 is provided on the engagement portion 28 provided on the container body 3. Since the receiving portion 29 is locked and the lowering of the front door 4 is prevented, the lowering of the front door 4 due to its own weight is prevented.

FIG. 6 is a partially omitted vertical side view showing a second embodiment of the door mechanism of the double door type airtight container according to the present invention.
In the door mechanism of the double door type closed container of this example, the front door 4 and the rear door 5 are connected to each other by a common chain 19 on the top side of the container body 3 as in the first embodiment. Yes. In this example, both ends of the common chain 19 are attached to the upper ends of the front door 4 and the rear door 5, respectively. Since other configurations are the same as those of the example of FIG. 1 described above, the first embodiment is used.

DESCRIPTION OF SYMBOLS 1 Front opening part 2 Rear opening part 3 Container body 4 Front door 5 Rear door 6 Guide part 6A Front door guide part 6B Rear door guide part 6a, 6b Storage part 13 Thin plate member 14 Beam member 15, 16 Packing groove 17, 18 Packing DESCRIPTION OF SYMBOLS 19 Common chain 20 Front door side guide body 21 Rear door side guide body 22 Drop brake sprocket 23 Drive sprocket 24 Common drive motor 25 Holding member 26 Front door side chain slack space 27 Rear door side chain slack space 28 Locking part 29 Locking receiving part

Claims (3)

A container body having a front opening and a rear opening is opened and closed by a front door and a rear door that move in the vertical direction by a drive motor, a drive sprocket that is rotationally driven by the drive motor, and a chain that is driven by meshing with the drive motor. A door mechanism of a double-door closed container,
The front door and the rear door are connected to each other by a common chain on the top side of the container body, and the front door side guide body and the rear door side guide for guiding the common chain are arranged on the top side of the container body. Body is provided corresponding to the front door and the rear door, and between the front door side guide body and the rear door side guide body via the drive sprocket meshing with the common chain. A door mechanism for a double-door type airtight container, wherein a common drive motor for driving the chain is provided.   The door mechanism of the double-door closed container according to claim 1, wherein the drive sprocket is provided with a pressing member that prevents the common chain from being detached from the drive sprocket.   The container body has a locking portion that locks the front door and the rear door at a position that closes the front opening and the rear opening and holds the front door and the rear door at the position. The door mechanism of the double door type airtight container according to claim 1 or 2, wherein the door mechanism is provided.

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