JP4868355B2 - Earthing device and storage method thereof - Google Patents

Description

  The present invention relates to an earthing device for unloading earth and sand excavated by construction work and the like, and a storage method thereof.

Conventionally, rough terrain vehicles, relays using backhoes, bulldozers or belt conveyors are used for horizontal transport of earth and sand in underground construction. On the other hand, the excavation work in the underground work is performed using a construction machine such as a backhoe or a clamshell or a continuous earthing device such as a vertical belt conveyor. Also, in construction work, in order to shorten the work period, the reverse floor construction method in which the floor work on the first floor is first performed and then the underground work and the ground work are performed in parallel may be employed. When excavating earth and sand generated by underground work in this reverse driving method, the underground work and ground work are performed in parallel. Will be limited. When working under such an empty head limit or working in a confined area with many obstacles, the work by the construction machine is greatly restricted, and the efficiency of carrying out sediment is greatly reduced. For such situations, for example, Patent Literature 1 and Patent Literature 2 have proposed earthing devices for improving workability and saving labor.
Patent Document 1 provides a conveyance guide rail having a vertical conveyance path and a horizontal conveyance path from an underground part to a predetermined height above the ground, and loads excavated earth and sand in the underground part into a container and places the container along the conveyance guide rail. The earthing device is moved from the underground part to the ground part, and the earth and sand in the container is loaded onto the dump truck at the above-ground part, improving the efficiency of carrying out the earth and sand. And since the earth and sand can be dropped directly into a dump truck from the container, the structure which makes the incidental installation other than this earthing apparatus unnecessary is comprised.
In Patent Document 2, an earthing device equipped with a clam shell in the inner space of the framed frame is installed so that it can be raised and lowered at the opening of the ground floor, and the earth and sand excavated in the underground part is picked up by the bucket of the clam shell. The earth and sand are dropped on the upstream part of the belt conveyor arranged in the earthing device on the ground floor and loaded on the dump truck waiting on the downstream part of the belt conveyor. During the work, the earthing device is installed on the ground floor, and when the work is not performed, the earthing device can be stored underground, so that the ground part can be used effectively.
JP 2004-331373 A JP 2005-336713 A

However, the earthing devices of Patent Document 1 and Patent Document 2 have the following problems.
In Patent Document 1, the transport guide rail of the earthing device is always arranged at a predetermined height on the ground. Normally, on the ground floor in construction work, there is work such as carrying in materials in addition to the above-mentioned earth and sand carrying-out work by pumping, and the traffic of vehicles increases at that time, so the earthing equipment is installed on the ground floor However, there was a problem that the traffic of the vehicle was hindered and the work efficiency of the construction was lowered.
Since Patent Document 2 has a structure in which the earthing device moves up and down at the opening, the earth and sand cannot be loaded directly from the bucket onto the dump truck. Ancillary facilities such as a belt conveyor to be communicated are required, and there is a problem that it takes time and labor to install or remove the ancillary facilities when the earthing device is stored or returned.

  The present invention has been made in view of the above-mentioned problems, and by simplifying the structure stored in the underground portion, the storage operation can be performed easily and in a short time, and the work efficiency of the construction has been improved. An object of the present invention is to provide a earthing device and a storage method thereof.

In order to achieve the above object, the earthing device according to the present invention is equipped with a transport guide rail that transports a box body from an underground portion to an above-ground floor through an opening portion, and a transport guide rail that is mounted by an elevating drive mechanism. And a lifting frame that can be moved up and down together with the transport guide rail through the section. The transport guide rail is provided with a detachable rail that is detachably connected by a pin structure , and the lifting frame has a part of the opening. A work stage is provided that is fixed to the surrounding casing by moving in the lateral direction and is provided with an overhanging locking member that is extended in the horizontal direction and locked to the surrounding casing. It is said.
Further, in the storage method of the earthing device according to the present invention, the lifting device includes a transport guide rail that transports the box body from the underground portion to the ground floor through the opening, and a lifting frame that is equipped with the transport guide rail. A method for storing a soil device, wherein an elevating frame is provided with a work stage that blocks a part of an opening and moves in a lateral direction to be fixed to a surrounding casing, and projects horizontally to surround the surrounding casing. An overhanging locking member is provided, which is provided on the conveyance guide rail and is detachably connected with the pin structure by a pin structure, and the elevation frame is lowered together with the conveyance guide rail by the elevation drive mechanism. It is characterized by doing so.
In the present invention, when the conveyance guide rail is arranged on the ground floor, the pin of the connecting portion of the detachable rail is removed to separate the detachable rail from the conveyance guide rail, and the elevator is moved up and down using an elevating drive mechanism such as an electric hoist, for example. The entire earthmoving device can be stored in the basement by lowering the frame. Accordingly, since the earthing device is not disposed on the ground floor, for example, material carrying-in work other than the earthing work can be performed without hindrance, and work efficiency can be improved.

In addition, the work stage is connected to the surrounding frame on the ground floor, a work platform is secured, a dump truck can be placed on the work stage, and excavated earth and sand can be loaded directly onto the dump truck from the box that has transported the transport guide rail. it can.
Further, when the lifting frame is lowered and the conveyance guide rail is arranged up to a predetermined height on the ground floor, the lifting frame is locked to a surrounding housing such as a floor slab on the ground floor, so that the lifting frame is It can be stably and securely fixed.

Moreover, in the earthing apparatus which concerns on this invention, it is preferable that the frame guide rail which guides an raising / lowering frame is provided in the surrounding housing located in the raising / lowering range of an raising / lowering frame.
In the present invention, since the elevating frame can be moved along the frame guide rail when the elevating frame is moved up and down, a smooth moving operation can be realized, and the elevating frame can be accurately moved to a predetermined position in a short time.

Further, in the earthing device according to the present invention, the elevating frame is provided with a lining plate that covers the upper portion of the elevating frame, and when the elevating frame is lowered and arranged in the underground portion, the lining plate It is preferable to close the opening.
In the present invention, when the entire earthmoving device is stored in the underground part, the lining board can be arranged so as to close the opening part on the ground floor, the opening part is eliminated on the ground floor, and the vehicle etc. You can pass through and perform other tasks.

According to the earthing device and its storage method of the present invention, a detachable rail that can be attached to and detached from the conveyance guide rail is provided by a simple connection structure with a pin structure, and the lift frame can be lowered and stored by removing the detachable rail. . Therefore, the storing operation can be performed very easily and in a short time, and the preparatory operation at the time of starting the operation can be performed very simply by the reverse procedure. And, for example, during the daytime, the use of the ground floor can be used to concentrate the materials, and during the nighttime when there is little work on the ground floor, transport guide rails and lifting frames are placed on the ground floor to carry out the earthing work. This can be done and the work efficiency of the construction can be improved.
In addition, because it is configured to efficiently transport boxes loaded with earth and sand via transport guide rails, soil and sand can be transported even when working under limited space or when there are many obstacles in narrow spaces. Work can be performed efficiently.

Hereinafter, embodiments of the earthing device and the storage method thereof according to the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view showing the overall outline of the earthing device according to the embodiment of the present invention, FIG. 2 is a diagram showing a state in which the conveyance guide rails of the earthing device are arranged at predetermined positions on the ground floor, and FIG. FIG. 4 is a side view showing a state of attaching / detaching the detachable rail, FIG. 5 is a cross-sectional view showing a connecting portion of the detachable rail in the conveyance guide rail, and FIG. 6 is a detachable rail. It is a principal part enlarged view which shows this connection structure.

  As shown in FIG. 1, the earthmoving device 1 according to the present embodiment has a floor slab 10 a that has a first floor (ground floor 10) as a work floor in a low-heading construction work where the upper work space is limited. Landing is performed using an opening R continuous to the basement floor. In this embodiment, the earth and sand excavated in the underground part of the third basement floor is loaded into a box-like container 2 (box body), pumped up to the ground floor 10, and loaded onto the dump truck 3.

Here, in the underground part in the present embodiment, the first basement floor 11 is the first basement floor 11, the second basement floor is the second basement floor 12, and the excavation work floor of the third basement floor is the lowest floor 13. And in each floor surface 11a, 12a of the 1st and 2nd underground floors 11, 12, the opening part R which continues from the ground floor 10 to the underground floor 13 is provided. In the following description, symbols R1, R2, and R3 are used for the openings R on each floor as necessary.
Moreover, as shown in FIG. 2, the floor slab 10a that forms the opening R1 of the ground floor 10 is formed with a notch 10b formed in a stepped shape in cross section on the upper surface side.

As shown in FIG. 2, the earthmoving device 1 of the present embodiment includes a conveyance guide rail 20 that conveys the container 2 from the lowest floor 13 through the opening R to the ground floor 10, and a conveyance guide rail 20. The upper and lower frames 30 are arranged so as to be able to move up and down with the upper part mounted on the inside, and a lifting drive mechanism 40 that provides a driving force for moving the lifting frame 30 up and down.
As a result, the earthing device 1 can carry out the earthing work by placing the transport guide rail 20 on the ground floor 10 during the work of carrying out the earth and sand, and at the time of non-earthing work, the lifting frame 30 is installed in the underground portion as shown in FIG. (The details will be described later).

Here, in the following description, in the conveyance guide rail 20, the conveyance start position of the container 2 on the lowest floor 13 is defined as a “start point”, and the conveyance stop position at which earth and sand are loaded from the container 2 onto the dump truck 3 is defined as an “end point”. .
A state where the end point of the transport guide rail 20 is located at a predetermined height on the ground floor 10 and where the earth and sand can be transferred from the container 2 to the dump truck 3 is referred to as a work state W1. A state in which the entirety is stored in the underground portion below the ground floor 10 will be described below as a storage state W2 (see FIG. 3).

  As shown in FIG. 2, the transport guide rail 20 has a plurality of rail members made of H-type steel material from the lowest floor 13 to the vicinity of the ceiling 14 of the ground floor 10 when the earthing device 1 is in the working state W1. It is connected in the direction. And the conveyance guide rail 20 has the vertical conveyance path 20a arrange | positioned at an up-down direction, and the horizontal conveyance path 20b arrange | positioned continuously in the substantially horizontal direction from the upper end part of the vertical conveyance path 20a.

The horizontal conveyance path 20b is supported below the beam member 31b of the elevating frame 30 described later, and the height dimension of the container 2 and the dump truck 3 is set between the lower side of the horizontal conveyance path 20b and the floor slab 10a. Secured and arranged. Therefore, the container 2 can be positioned above the loading platform of the dump truck 3 at the end point of the conveyance guide rail 20. In addition, the height dimension should just set to the floor height of the grade which can throw in excavation earth and sand from the container 2 on the dump truck 3. FIG.
Here, the container 2 is configured such that the bottom opening / closing door 2a is opened or closed automatically or manually. Therefore, excavated earth and sand can be transferred from the opening at the bottom of the container 2 to the dump truck 3 without turning the container 2 upside down.

  A belt conveyor 4 for moving the container 2 laterally is provided on the foundation of the lowermost floor 13 on the starting point side of the conveyance guide rail 20. The belt conveyor 4 sequentially moves the containers 2 loaded with excavated earth and sand to position the containers 2 at predetermined positions. The predetermined position is a position at which the container 2 is gripped by the gripping unit 23 (described later) at the starting point of the transport guide rail 20.

  As shown in FIG. 2, a roller chain 22 (see FIG. 5) that is annularly arranged in the range from the start point to the end point of the transport guide rail 20 is rotated by the rotational power of the drive motor 21 inside the transport guide rail 20. Built to move. A gripping unit 23 that moves on the transport guide rail 20 by the rotation of the roller chain 22 is provided. The gripping unit 23 includes a traveling portion 23a that meshes with the roller chain 22, a rolling portion 23b that rolls along the conveyance guide rail 20, and a fixing portion 23c that detachably grips the side surface of the container 2. Yes.

  The elevating frame 30 has an outer shell framed with a steel material such as H-shaped steel, and is three-dimensionally constituted by a plurality of column members 31a and a beam member 31b connecting the upper and lower portions of the column members 31a. It is assembled (see FIG. 1). Although this elevating frame 30 will be described in detail later, the elevating drive mechanism 40 can be raised and lowered by taking a reaction force from the surrounding casing (the lower surface of the floor slab 10a of the ground floor 10), and the earthing device 1 is in a working state. In the case of W1, it is locked by the overhanging locking member 32 with respect to the surrounding casing.

  The overhanging locking member 32 is configured to connect the column member 31a of the lifting frame 30 and the floor slab 10a of the ground floor 10. That is, as shown in FIG. 2, when the earthing device 1 is in the working state W1, the lifting frame 32 is extended and locked so as to be inserted into the notch 10b of the floor slab 10a. 30 can be locked stably and securely.

In addition, as shown in FIG. 2, at a substantially middle stage in the vertical direction of the lifting frame 30, a part of the opening R <b> 1 is blocked and moved in the lateral direction to be fixed to the floor slab 10 a (surrounding frame) of the ground floor 10. A work stage 33 is provided. The work stage 33 is provided with an opening 33b (see FIG. 1) through which the transport guide rail 20 and the container 2 moving on the transport guide rail can pass.
When the earthing device 1 is in the work state W1, the work stage 33 is connected to the floor slab 10a of the ground floor 10 to secure a work scaffold. That is, the work stage 33 is fixed in a state where the end portion 33a on the slab side is moved to the floor slab 10a side of the surrounding casing and is placed on the notch 10b of the floor slab 10a. Thereby, the dump truck 3 can get on the work stage 33, and the excavated earth and sand can be loaded from the container 2 that has moved the conveyance guide rail 20.

Further, a cover plate 34 is attached to the top of the elevating frame 30 on the beam member 31b so as to cover the top. As shown in FIG. 3, the outer dimension of the lining plate 34 is substantially the same as the outer periphery of the notch 10 b of the floor slab 10 a of the ground floor 10. Therefore, when the earthmoving device 1 is in the retracted state W2, the lining plate 34 is placed at the level of the floor level of the ground floor 10 so as to fit and cover the notch 10b, and the upper portion thereof is The vehicle can pass through.
A predetermined gap S is ensured between the ceiling 14 of the ground floor 10 and the lining plate 34 because the lifting frame 30 needs to be lifted when a detachable rail 50 (see FIG. 4) described later is removed. Keep it.

Next, the raising / lowering drive mechanism 40 which moves the raising / lowering frame 30 to an up-down direction is demonstrated.
As shown in FIG. 2, first, in the earthing device 1, frame guide rails 42 that guide the elevating frame 30 in the vertical direction are fixed to the casings of the first and second basements 11 and 12. Thus, the moving frame 30 can be moved along the frame guide rail 42 when moving up and down, whereby a smooth moving operation can be realized, and the moving frame 30 can be accurately moved to a predetermined position in a short time.
And as the raising / lowering drive mechanism 40 by this Embodiment, an electric hoist and a chain block are employ | adopted. The elevating drive mechanism 40 is attached to the lower surface 10c of the slab of the ground floor 10 (the ceiling in the first basement 11), and a hook 40b connected to the tip of the chain 40a is connected to the lower end of the elevating frame 30. . Then, by driving the lifting drive mechanism 40, the entire lifting frame 30 can be lifted and lowered in the opening R.

Next, the structure for arrange | positioning the earthing apparatus 1 in the storage state W2 is demonstrated based on drawing.
As shown in FIGS. 2 and 3, the transport guide rail 20 is provided with a detachable rail 50 at a predetermined position in the vertical transport path 20a. The predetermined position is a basement position when the earthmoving device 1 is in the working state W1. Moreover, the length dimension of the detachable rail 50 is substantially equivalent to the height dimension of the part arrange | positioned at the ground floor 10 of the earthmoving apparatus 1 in the working state W1. That is, the space formed when the detachable rail 50 is removed is a range in which the ground portion of the earthmoving device 1 is lowered.

  As shown in FIG. 4, the structure of the upper and lower side connecting portions T1 and T2 of the detachable rail 50 includes a horizontal fixing pin 51 for fixing the horizontal direction and a vertical fixing pin 52 (see FIG. 5) for fixing the vertical direction. The pin structure which consists of is adopted. Further, as shown in FIGS. 5 and 6, in the state where the rails are connected to each other, both the connected rails have a coaxial through hole through which the horizontal fixing pin 51 and the vertical fixing pin 52 are inserted. The metal object 53 is fixed, or a through hole is provided in the rail member.

  As shown in FIG. 4, a movable rail gripping device 60 equipped with wheels such as a forklift is used when attaching / detaching the attachment / detachment rail 50. The rail gripping device 60 includes a guide 62 disposed in the vertical direction, and locking portions 61 and 61 that are movable in the vertical direction along the guide 62 and project in the horizontal direction. Note that a locking hole 54 for inserting the locking portion 61 of the rail gripping device 60 is formed at an appropriate location on the side surface of the detachable rail 50.

Next, the earthing method in the earthing apparatus 1 comprised in this way is demonstrated based on drawing.
As shown in FIG. 2, when the conveyance guide rail 20 is in the working state W <b> 1, the excavated earth and sand are loaded on the empty container 2 on the belt conveyor 4 by loading means such as a backhoe on the lowest floor 13. Then, the container 2 is moved laterally to a predetermined position, that is, the position of the starting point of the transport guide rail 20 by driving the belt conveyor 4, and is gripped by the grip unit 23 of the transport guide rail 20. Then, the container 2 is transported along the transport guide rail 20 to the loading point of the ground floor 10 (end point of the transport guide rail 20), and the bottom of the container 2 is opened and excavated on the loading platform of the dump truck 3 waiting in advance. Load earth and sand. Further, the empty container 2 is returned to the starting point of the lowest floor 13 along the transport guide rail 20.

Next, a method for storing the earthing device 1 in the underground part in the case of non-earthing work will be described based on the drawings.
As shown in FIGS. 3, 5, and 6, first, the roller chain 22 (see FIG. 5) is moderately loosened while the overhanging locking member 32 of the lifting frame 30 is locked, and the upper connecting portion T1. The horizontal fixing pin 51 and the vertical fixing pin 52 of the detachable rail 50 are pulled out and removed, and the lifting frame 30 is lifted by the lifting drive mechanism 40. Thereafter, the locking portions 61 and 61 of the rail gripping device 60 are inserted and held in the locking holes 54 and 54 of the detachable rail 50, and the horizontal fixing pin 51 and the vertical fixing pin 52 of the lower connection portion T2 are held. Pull out and remove (see FIG. 4).
Subsequently, by moving the locking portions 61, 61 of the rail gripping device 60 upward along the guide 62, each locking portion 61 is locked and held in the locking holes 54, 54 of the detachable rail 50. When the rail gripping device 60 is moved, the detachable rail 50 can be extracted from the transport guide rail 20.

Next, as shown in FIG. 2, the overhanging locking member 32 is pulled out from the notch 10b of the floor slab 10a in a state where the lifting frame 30 is suspended by the lifting drive mechanism 40 to release the locking state, and together with the work stage 33 is moved laterally away from the notch 10b of the floor slab 10a to release the fixed state. Then, the elevating drive mechanism 40 is driven to loosen the chain 40a, and the frame guide rail 42 is guided to gradually lower the elevating frame 30. Thereby, as shown in FIG. 3, the entire earthmoving device 1 can be stored in an underground portion below the ground floor 10. At this time, the opening R1 in the ground floor 10 is closed by the lining plate 34 on the elevating frame 30, and a vehicle or the like can pass through the upper portion of the lining plate 34.
In addition, what is necessary is just to perform by the reverse procedure of the storing method mentioned above, when changing the earthing machine 1 from the storage state W2 to the working state W1.

Next, in the present embodiment, the third basement floor is the lowest floor 13, but when the lowermost floor 13 is further lowered to become the fourth basement floor. A method of extending 20 will be described.
In the retracted state W2 shown in FIG. 3, first, the roller chain 22 (see FIG. 5) is disconnected from a predetermined connecting portion, and an extension rail member (not shown), for example, a rail member similar to the detachable rail 50 shown in FIG. The horizontal fixing pin 51 and the vertical fixing pin 52 are extracted at the place where the applicable) is inserted and separated from the conveyance guide rail 20 (see FIGS. 4, 5 and 6). At this time, in order to prevent the separated lower conveyance guide rail 20 from falling, it is necessary to fix it with a suspension member (not shown).
Subsequently, a space is secured between the transport guide rails 20 separated while loosening the suspension member so that the extension rail member can be inserted. Thereafter, the extension rail member is inserted into the space by using the rail gripping device 60, and the pins 51 and 52 are attached in the reverse procedure when removed, so that the transport guide rail 20 and the extension rail member separated from each other are attached. Link. Thereafter, the disconnected roller chain 22 is connected to complete.

In the earthing device and the storage method thereof according to the present embodiment described above, the detachable rail 50 that can be attached to and detached from the transport guide rail 20 is provided by a simple connection structure using a pin structure, and the lift frame 30 is moved up and down by removing the detachable rail 50. Can be stored. Therefore, the storing operation can be performed very easily and in a short time, and the preparatory operation at the time of starting the operation can be performed very simply by the reverse procedure. For example, during the daytime, the ground floor 10 can be used to carry in materials in a concentrated manner, and the conveyance guide rails 20 and the lifting frame 30 are arranged on the ground floor 10 during night hours when there is little work on the ground floor 10. The work efficiency can be improved.
In addition, since the container 2 is transported via the transport guide rail 20, the transport work of earth and sand can be efficiently performed even when the work is under the restriction of empty head or when the work is performed in a confined area with many obstacles. .

As mentioned above, although the embodiment of the earthing apparatus and its storage method by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the present embodiment, one detachable rail 50 is removed when the earthing device 1 is stored. However, the present embodiment is not limited to one, and a plurality of detachable rails having the same connection structure are attached and detached. It does not matter even if it is the composition to make it.
In addition, the connecting portion of the plurality of rail members constituting the transport guide rail 20 is not limited to the detachable rail 50 which is the detachable means at the time of storage, and the detachable rail is attached to the rail member where the rail is extended as in the present embodiment. It is preferable to adopt a pin structure similar to the 50 connection structure.
And as the raising / lowering drive mechanism 40 of the raising / lowering frame 30, not only an electric hoist and a chain block but mechanisms, such as a hydraulic cylinder and a jack, are also employable, and the latch for latching the raising / lowering frame 30 with respect to a surrounding housing. The mechanism is not limited to that using the overhanging locking member 32, and various configurations are conceivable.
Of course, the configuration and dimensions of the lifting frame 30 and the specific configuration of the connection between the lifting frame 30 and the conveyance guide rail 20 may be optimally designed in consideration of the work content and work conditions to be performed.

It is a perspective view which shows the whole outline | summary of the earthing apparatus by embodiment of this invention. It is a figure which shows the state which has arrange | positioned the conveyance guide rail of the earth lifting apparatus to the predetermined position of a ground floor. It is a figure which shows the state which stored the earthing apparatus in the underground part. It is a side view which shows the attachment / detachment work state of an attachment / detachment rail. It is sectional drawing which shows the connection part of the attachment or detachment rail in a conveyance guide rail. It is a principal part enlarged view which shows the connection structure of a detachable rail.

Explanation of symbols

1 Unloading device 2 Container (box)
DESCRIPTION OF SYMBOLS 10 Ground floor 20 Conveying guide rail 30 Lifting frame 32 Overhanging locking member 33 Work stage 34 Covering plate 40 Lifting drive mechanism 42 Frame guide rail 50 Detachable rail 60 Rail gripping device R Opening portion W1 Working state W2 Storage state

Claims (4)

A transport guide rail that transports the box from the basement to the ground floor through the opening,
An elevating frame that is mounted so that it can be moved up and down together with the conveying guide rail through the opening by an elevating drive mechanism;
With
The transport guide rail is provided with a detachable rail that is detachably connected by a pin structure ,
The lifting frame is provided with a work stage that closes a part of the opening and moves in the lateral direction and is fixed to the surrounding casing, and is extended horizontally and locked to the surrounding casing. An earthing device provided with an out- locking member . The earthing device according to claim 1 , wherein a frame guide rail that guides the elevating frame is provided in a surrounding casing located in an elevating range of the elevating frame . The elevating frame is provided with a lining plate that covers the upper portion of the elevating frame, and when the elevating frame is lowered and arranged in the underground portion, the opening portion is closed with the lining plate. The earthing device according to claim 1 or 2, characterized by the above. A storage method for a earthing device including a transport guide rail that transports a box body from an underground part to an above-ground floor through an opening, and a lifting frame to which the transport guide rail is attached,
The lifting frame is provided with a work stage that closes a part of the opening and moves in the lateral direction and is fixed to the surrounding casing, and is extended horizontally and locked to the surrounding casing. An out-locking member is provided,
An earthmoving device according to the present invention, wherein a detachable rail provided on the conveyance guide rail and detachably connected by a pin structure is removed, and the lifting frame is lowered together with the conveyance guide rail by an elevating drive mechanism. Storage method.

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