JP2003237923A - Carrier, plug opening device using the carrier, and carrying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug opening device of a simple structure and easy maintenance and service, and a chain conveyor thereof. <P>SOLUTION: In a carrier 2, an endless chain (an endless transmission member) 5 is stretched over a drive sprocket (a drive wheel) 3 and a driven sprocket (a driven wheel) 4 which are separated from each other in the horizontal direction, a support base 6 is disposed between the drive sprocket 3 and the driven sprocket 4, an accommodation case 9 to accommodate a container 8 is placed on a chord 7 on the on-going side which is pulled by the drive sprocket 3 of the endless chain 5, and the chord 7 on the on-going side is supported by an elevating/lowering guide piece 10 playing a role of a chain guide. When the guide piece 10 is lowered, the accommodation case 9 is received by the support base 6. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrying device for carrying a container such as a milk bottle in a storage case, a capping device using the carrying device, and a carrying method.

[0002]

2. Description of the Related Art Most of the containers distributed as bottles of milk, yogurt, etc. are reused (returnable bottles).
Therefore, the container is collected after being used by the consumer,
It is stored together in a storage case for every predetermined number. This item is transported to a factory or the like, where it is recycled such as washed.

In the above-mentioned factories and the like, the collected containers are placed in a container housed in a storage case and carried by a carrying device to be carried in the premises. In a conventional transfer device used for such transfer, an endless chain is circulated between a horizontally separated drive sprocket and a driven sprocket, and the storage case is placed on the upper chord of the endless chain pulled by the drive sprocket. As a result, the container is transported together with this storage case.

When the container in the storage case is subjected to a predetermined process during the above-mentioned transportation, it is necessary to stop the storage case. Therefore, the storage case is forcibly stopped by abutting against a stopper or the like while circulating the endless chain, or the storage case is stopped at a predetermined position by stopping the endless chain. After the predetermined processing is completed, the stopper or the like is released or the endless chain is circulated again to carry the container with the storage case to the next step.

One of the above-mentioned predetermined processes is, for example, removing the lid that closes the opening of the container in the storage case. Conventionally, a cap opening device has been used to remove such a lid. The conventional cap opening device has already been disclosed in Japanese Patent Laid-Open No. 2000-203690.

[0006]

However, when the storage case which is being carried on the transfer device and is being conveyed is forcibly stopped by the stopper or the like as described above, the storage case is impacted by the stopper or the like. The strength is required so that it is not easily deformed. Further, since the slip occurs between the lower surface of the storage case and the endless chain while the storage case is stationary, it is essential to take measures to suppress the wear of both. Therefore, it has been necessary to apply a strong and complicated structure to the storage case.

Alternatively, when the endless chain is stopped and the storage case is made stationary, while the lid is removed from the container in the one storage case, it is placed on the endless chain either before or after the one storage case. The transportation of other storage cases will also be stopped. Therefore, it causes a delay in the total process time required for the cleaning process.

Therefore, by continuously circulating the endless chain,
When the storage case reaches a predetermined position, the storage case is lifted by a lifter or the like, and after the lid is completely removed in this state, the storage case is put on the endless chain again. However, when several tens of glass bottles are stored in the storage case, the total weight of them increases significantly.

Further, in order to remove the lid from the container in the storage case, it is necessary to press the container with a certain amount of force, and as a whole, a large force acts on the lifter or the like. There is a problem in that the size of the lifter is inevitably increased and the equipment cost is increased.

In view of the above problems, the object of the present invention is to
An object of the present invention is to provide a transfer device and a transfer method that have a simple structure and can be easily maintained and maintained, and further to provide an opening device using the transfer device.

[0011]

According to the carrier device of the present invention, an endless transmission material is wound between a drive wheel and a driven wheel, and a container is placed on the upper chord of the endless transmission material pulled by the drive wheel. Place a storage case to store, support the upper string around the center between the drive wheel and the driven wheel with a guide piece that can move up and down, place a support table near the center of the upper string, and lower the guide piece. As a result, the upper string loosens below the support, and the storage case that descends with this upper string is received by the support,
By raising the guide piece, the upper string passes above the support table and the storage case is placed on the upper string.

The cap opening device according to the present invention is a cap opening device for removing a lid that closes the opening of a container housed in a housing case, and the lid is detached from the container at the position of the support base of the transfer device. A plurality of opening means are arranged in line, and these opening means are arranged so as to correspond to the opening of the container in the storage case received by the support base.

Further, in the cap opening device according to the present invention, the cap opening means presses a certain part of the lid near the outer periphery from above and an engaging claw that engages with another portion of the lid near the outer periphery. A swinging means for swinging the engaging claw to engage or disengage the lid, a holding means for holding the pressing member and the engaging claw, and a vertical moving means for vertically moving the holding means. Is.

The carrying method according to the present invention comprises a step of carrying in a storage case for accommodating a container on an upper chord of an endless transmission material wound between a drive wheel and a driven wheel, and an upper chord of the endless transmission material. By lowering the vicinity of the center between the drive wheel and the driven wheel, the storage case that descends along with the upper string is received by the support table installed directly below this storage case, and the upper string of the endless transmission material. The step of raising the portion near the center between the drive wheel and the driven wheel of the above, and carrying out the storage case, which is separated from the support base upward with this upper chord, on the upper chord of the endless transmission material, is carried out. .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a carrier device 2 mainly composed of a chain conveyor according to an embodiment of the present invention and a cap opening device 1 using the carrier device 2. A- in the figure
A section A is shown in FIG. In this embodiment, an example is shown in which the cap opening device 1 and the transfer device 2 cooperate with each other to perform their functions, but these devices are not necessarily used in combination. For example, the transport device 2
Is applied not only to the cap opening device 1 but also to container cleaning steps, filling steps, etc. (equipment for aligning and storing a large number of containers in an empty storage case), uncaser (inside the storage case) It is also possible to effectively utilize the containers that are lined up and stored as a transfer device such as a device for taking out the containers on a container transfer conveyor or on a mounting table.

The transfer device 2 includes a driving sprocket (driving wheel) 3 and a driven sprocket (driven wheel) which are horizontally separated from each other.
4, an endless chain (endless transmission material) 5 such as a link chain is wound around and a support base 6 is arranged, and the endless chain 5 is pulled by the drive sprocket 3 in the transport direction indicated by the arrow X. A storage case 9 for storing a container 8 is placed on the upper string 7, and the upper string 7 is supported by a vertically movable guide piece 10 which functions as a chain guide. The upper string 7 is a string stretched between the drive sprocket 3 and the driven sprocket 4, and is a part that receives tension in the above-described transport direction.

The drive sprocket 3 is attached to the output shaft of an electric motor 30 with a reducer. The reducer-equipped electric motor 30 is fixed to one end of the conveyor frame 21 supported by the leg members 20 at a predetermined height from the floor surface 110. The driven sprocket 4 is rotatably supported near the other end of the conveyor frame 21. A pair of guide rails 23 that define the trajectory and posture of the storage case 9 are fixed to both sides of the conveyor frame 21 via stays 24.

In FIG. 1, the dashed-dotted lines respectively representing the drive sprocket 3, the driven sprocket 4 and the endless chain 5 are conveyor frames 2 made of a square frame made of steel or the like.
1 shows an overview of what is inside 1 viewed through or directly. Further, in the figure, the driving sprocket 3 and the driven sprocket 4 are shown one by one, but inside the conveyor frame 21, the driving sprocket 3 and the driven sprocket 4 are connected via a connecting shaft or the like, respectively. One similar sprocket connected is provided separately.

Although only one endless chain 5 is shown in FIG. 1, the same one as the endless chain 5 circulates between sprockets (not shown). That is, as shown in FIG. 2, two endless chains 5 circulate inside the conveyor frame 21. The lower chord 71 of each of these two endless chains 5 is the conveyor frame 2
The slack is straightened to some extent by a plurality of guide sprockets 25 provided on the inner side surface of 1.

On the other hand, the upper strings 7 of each of the two endless chains 5 are supported by a guide piece 10 and a fixed chain guide 100, as shown in FIG. More specifically, as shown in FIG.
The two fixed chain guides 100 are respectively arranged near both sides inside of each of the guide pieces 10 and, as shown in FIG. 2B, at both ends of each guide piece 10 in the longitudinal direction (corresponding to the circulation direction of the endless chain 5). The ends are close together. The upper chord 7 of the endless chain 5 is supported by the guide pieces 10 and the fixed chain guide 100.

The pair of guide pieces 10 has an actuator 1 that performs a reciprocating linear motion in the vertical direction at the center in the longitudinal direction.
01, for example, an actuating rod 102 such as a pneumatic cylinder or a hydraulic cylinder is supported via a bracket 103. Further, the vicinity of both ends of the guide piece 10 is supported by a linear motion guide tool 104 that regulates the guide piece 10 so as not to swing when moving up and down. The fixed chain guide 100 has a posture in which a metal rail or the like is vertically aligned with the guide piece 10,
It is fixed to the inner surface of the conveyor frame 21.

The linear guide 104 is, for example, the guide piece 1.
The lifting shaft 105 extending vertically is fixed to 0, and the lifting shaft 1
The linear motion bearing 106, through which 05 is vertically movable, is fixed to the bottom plate 27 of the conveyor frame 21.

In the above description, FIGS. 1 and 2 show that when the guide piece 10 is located at the upper limit, the upper chord 7 of the endless chain 5 runs along the upper surfaces of the guide piece 10 and the two fixed chain guides 100. It shows a state where the vehicle can travel straight in the horizontal direction. On the other hand, FIG. 3 shows the guide piece 1.
When 0 is at the lower limit, the portion of the upper string 7 of the endless chain 5 supported by the guide piece 10 is slackened downward by its own weight and is supported by the guide piece 10.

The support table 6 has its mounting top plate 61 positioned, for example, 2 to 5 cm lower than the upper limit of the guide piece 10 (the upper chord 7 of the endless chain 5). The lower surface of the support base 6 is supported by four mount bolts 26 that are erected on the bottom plate 27 of the conveyor frame 21. On the mounting top plate 61, two relief portions 60 are formed along the circulation direction of the upper chords 7 of the endless chain 5 so that the upper chords 7 can travel inside.

The escape portion 60 may be a groove having a cross-sectional shape as shown in FIG. 2 or FIG. 3, but may be simply an opening through which the upper chord 7 of the endless chain 5 can pass through the mounting top plate 61 downward. The container 8 refers to a container such as a milk bottle whose opening 80 is open upward. The storage case 9 is a box whose upper surface is open and which allows a plurality of containers 8 to be arranged side by side vertically and horizontally.

By lowering the endless chain 5,
As shown in FIG. 3, the storage case 9 is placed on the support base 6 and stands still. In this state, the container 8 in the storage case 9 on the support base 6 can be subjected to some processing.

The operation of the carrier device 2 will be described below step by step. First, as shown in FIG. 1, the storage case 9 in which the container 8 is stored is placed on the upper chord 7 of the endless chain 5 and carried in from the driven sprocket 4 side. At this time, as shown in FIG. 2, the chain guide piece 10 is located at the upper limit.

The carried-in storage case 9 is conveyed in the direction indicated by the arrow X in FIG. 1 as the endless chain 5 circulates, and when it is positioned right above the support base 6, the limit switch 22 stores the storage case 9 therein. The front end face of the will contact. As a result, the limit switch 22 transmits a case detection signal. At the same time, the limit switch 22 also serves as a stopper. That is, since the limit switch 22 is spring-biased in the direction opposite to the direction in which the storage case 9 is conveyed, when the front end surface of the storage case 9 comes into contact with the limit switch 22, the storage case 9 will not move.
Receives some repulsive force from. As a result, the storage case 9 is accurately positioned at the predetermined stop position.

Control means based on the case detection signal
(Not shown), but by lowering the guide piece 10,
The upper chord 7 of the endless chain 5 is bent and loosened below the support base 6 by its own weight. This endless chain 5
The storage case 9 that descends along with the upper string 7 is received by the mounting top plate 61 of the support base 6.

Unless otherwise specified below, the start / stop of the actuator and the like is controlled by the above-mentioned control means on the basis of a limit switch for detecting the start and end of each process and an electric signal transmitted from these. I shall.

Further, with the storage case 9 being received by the support base 6, the container 8 in the storage case 9 on the support base 6 can be subjected to some processing as described above.

When some processing is completed, the guide piece 10 is raised to the upper limit again. As a result, the upper string 7 of the endless chain 5 travels above the mounting top plate 61 of the support base 6, so that the storage case 9 can be placed on the upper string 7 of the endless chain 5 again. As a result, the storage case 9 placed on the upper string 7 of the endless chain 5 is
It is carried out to the drive sprocket 3 side.

Next, as shown in FIG. 1, in the cap opening device 1 according to the embodiment of the present invention, an opening 8 from a container 8 is provided in an upper frame 112 of a main frame 111 which is erected on a floor surface 110.
A plurality of opening means 11 for removing the lid 81 for closing 0 are attached. Regarding these plural opening means 11,
Only the outline of the outer shape is shown in FIG.
The details are shown in FIGS. 4 and 5. These plural opening means 11 are respectively located directly above the support base 6,
The plurality of containers 8 housed in the housing case 9 are arranged so as to face directly above the openings 80.

As shown in FIGS. 4 and 5, the opening means 11 engages the pressing member 12 that presses a part of the outer periphery of the lid 81 from above and the other part of the lid 81 that surrounds the outer periphery of the lid 81. The engaging claw 13, the swinging means 14 for swinging the engaging claw 13 to engage or disengage from the lid 81, the pressing member 12 and the engaging claw 1.
3, holding means 15 for holding 3 and vertical moving means 16 for moving the holding means 15 up and down.

The pressing member 12 is biased downward by a coil spring 120 so that the container 8 can be pressed appropriately downward. The holding means 15 supports the plurality of pressing members 12 and the engaging claws 13 at predetermined positions. For example, it is a frame in a horizontal posture as shown in the drawing, and a set of pressing member 12 and engaging claw 1 which constitutes each individual cap opening means 11.
A plurality of sets of 3 are supported.

More specifically, the holding means 15 has a rod-shaped pressing member 12 extending in the vertical direction inserted through it so as to be vertically movable, and an upright piece 150 provided in the vicinity of the pressing member 12 is engaged with the engaging claw 13.
The body portion of the rocking node 130 formed at the lower end is rotatably attached via a pin 131. A piercing member 151 protruding downward is fixed between the pressing member 12 and the engaging claw 13. Further, as well shown in FIG. 1, both ends of the holding means 15 may be fixed by welding or the like in a cover 152 opened downward to cover the entire opening means 11.

The swinging means 14 may be an actuator or the like connected to the swinging node 130 by a link, but an application example of the fixed cam 140 is illustrated. That is, the fixed cam 140 is mounted on the upper frame member 1 of the main frame 111 by a bracket (not shown).
13 or fixed at an appropriate position on the main frame 111. A roller 132 is fixed around the pin 131 to fix the cam 14.
In order to follow 0, the coil spring 13 that biases the swinging node 130 in a direction in which the roller 132 presses the fixed cam 140.
3 is attached.

When the holding means 15 moves up, the roller 132 provided at the upper end of the rocking joint 130 follows the fixed cam 140 in accordance with this operation. Specifically, the operation of the rocking node 130 will be described in steps E to I described later.

The vertical moving means 16 is an actuator that performs a reciprocating linear motion in the vertical direction. For example, a pneumatic cylinder or a hydraulic cylinder is fixed to the upper frame member 113, and the operating rod 161 is directly connected to the operating rod 161 via the cover 152 or directly. The holding means 15 is connected to the. The vicinity of both ends of the cover 152 or the holding means 15 is supported by the linear motion guide tool 114. The linear motion guide tool 114 has substantially the same configuration as that of the linear motion guide tool 104 described above, and a description thereof will be omitted.

The operation of the cap opening device 1 using the transfer device 2 will be described below step by step. These steps are listed in the order of steps A to L.

A: As shown in FIG. 1, a storage case 9 accommodating a container 8 is placed on the upper chord 7 of the endless chain 5 and carried in from the driven sprocket 4 side. At this time, as shown in FIG. 2, the chain guide piece 10 is located at the upper limit.

B: The loaded storage case 9 is transported in the direction indicated by the arrow X in FIG. 1 as the endless chain 5 circulates, and is stored in the limit switch 22 when it is located right above the support base 6. The front end surface of the case 9 contacts. As a result, the limit switch 22 transmits a case detection signal.

C: Based on this case detection signal, the control means (not shown) lowers the guide piece 10 so that the upper chord 7 of the endless chain 5 bends below the support base 6 by its own weight. Will loosen. The storage case 9 that descends along with the upper string 7 of the endless chain 5 is received by the mounting top plate 61 of the support 6.

D: With the storage case 9 being received by the support base 6, the vertical moving means 16 of the cap opening device 1 is activated, and together with the holding means 15, the pressing member 12, the engaging claw 13 and the swinging means. 14 descends.

In this descending process, the opening means 11 of FIG. 4 (a) through FIG. 4 (b) and FIG. Reach the state. Then, when the up-and-down moving means 16 starts to move up,
The opening means 11 is in the state shown in FIG. 5 (e) and further in the state shown in FIG. 5 (f). This is steps E to J described in detail below.

Here, FIG. 1 shows the standby state of the opening means 11, and the detail of FIG. 4 (a) shows the lid 81 of the container 8.
The opening means 11 is shown above. In the figure, the space between the container 8 and the opening means 11 is, for convenience of description,
It is intentionally shortened.

E: First, as shown in FIG. 4A, the tip of the engaging claw 13 located above the container 8 is outward in the radial direction of the lid 81 (hereinafter referred to as "outward"). ) Take a tilted posture.

F: When the holding means 15 is lowered from the state shown in FIG. 4A, the rollers 132 follow the lower raised surface 141 of the fixed cam 140 as shown in FIG. 13 stands upright. When the holding means 15 is further lowered, the engaging claws 13 are at substantially the same height as the outer peripheral edge portion of the lid 81, or downward at the outer peripheral edge portion of the lid 81, as shown in FIG. In the course of passing, the tip of the engaging claw 13 is the lid 8
It is pressed by the outer peripheral edge portion of No. 1 and becomes a tilted posture that is slightly opened outward. As a result, the roller 132 is fixed to the fixed cam 140.
Slightly separated from. Almost at the same time, the piercing member 151
Will pierce the lid 81.

In the state shown in FIGS. 4B and 4C, the pressing member 1
The reason why 2 presses the container 8 downward is that the container 8 is sandwiched between the pressing member 12 and the bottom surface of the storage case 9 so that the container 8 does not swing or fall.

G: The engaging claw 13 returns to the upright posture as shown in FIG. 5D immediately after passing downward while slidingly contacting the outer peripheral edge of the lid 81. In this state, the engaging claw 13 is the lid 8
1. Engage with the outer peripheral edge portion of 1. Further, in this state, the vertical movement means 16 reaches the lower limit.

H: When the up-and-down moving means 16 is switched to the reverse operation, that is, the ascending operation, as shown in FIG.
3 is lifted by the one engaged with the outer peripheral edge portion of the lid 81,
Is the pressing member 12 on the side opposite to the engaging portion of the engaging claw 13.
Since it continues to be pressed by, it becomes an inclined posture, and the connection between the opening 80 of the container 8 and the lid 81 is released.

I: When the opening means 11 is further raised, FIG.
As shown in (f), the vertical movement means 16 reaches the upper limit,
The lid 81 is completely removed from the container 8. At the same time, since the roller 132 follows the upper raised surface 142 of the fixed cam 140, the engaging claw 13 takes an inclined posture that is opened outward,
The engaging claw 13 separates from the lid 81.

J: The pressing member 12 urged downward by the coil spring 120 during the transition from the H step to the I step.
Since the lid 81 pushes the lid 81 downward, the lid 81 serves as the piercing member 1.
It comes off from 51 and falls from the opening means 11.
As a result, the opening means 11 returns to the state shown in FIGS. 1 and 4 (a) (step E). The lid 81 that has fallen into the storage case 9
Are removed in the next process.

The opening means 11 of the opening device 1 repeats the above steps E to I. In addition, since the endless chain 5 continues to circulate during the steps E to I, the storage case 90 that is conveyed prior to the storage case 9 and the subsequent one while the lid 81 of the container 8 stored in the storage case 9 is removed. The storage case 91 continues to be transported. For this reason, the transport intervals of the storage cases 90, 9, and 91 vary slightly for the process time of the processes E to I,
There is no time loss such that these stay on the chain conveyor 2.

K: The guide piece 10 is moved up to the upper limit again. As a result, the upper string 7 of the endless chain 5 is attached to the support base 6
Since it will travel above the mounting top plate 61 of
The storage case 9 can be put on the upper string 7 of the endless chain 5 again.

L: The storage case 9 placed on the upper string 7 of the endless chain 5 is carried out to the drive sprocket 3 side. On the other hand, the succeeding storage case 9
1 reaches just above the support base 6, and the process B and subsequent steps are repeated.

An endless transmission material such as a silent chain may be applied to positively reduce noise. Further, although the number of the endless chains 5 is two in the above description, it may be three or more, or one if the chain is wide.

The direction in which the storage case 9 is conveyed is not limited to the horizontal direction, but the drive sprocket 3 and the driven sprocket 4 are arranged at different heights from each other, and are inclined with respect to the floor 110, for example. The direction may be set.

[0059]

According to the carrying device and the carrying method of the present invention, the storage case is forcibly stopped by a stopper or the like,
Since there is no slip between the lower surface of the storage case and the endless chain, it is not necessary to make the storage case a sturdy and complicated structure. Moreover, the mechanism for raising the storage case with a lifter or the like can be omitted. Therefore, the structure is simple,
Manufacturing cost can be kept low.

Further, since it is not necessary to stop the endless upper transmission material while the storage case is stationary, it is not necessary to stop other storage cases preceding or succeeding the stationary storage case, and the transfer time can be shortened. It can be kept to a minimum.

According to the cap opening device of the present invention, since the pressing means for pressing the container is provided, it is not necessary to separately install a mechanism for fixing the container so as not to fall when the lid is removed from the container, and the structure is simple. Is. Therefore, there are advantages that the manufacturing cost is low and the number of maintenance or maintenance points is small.

[Brief description of drawings]

FIG. 1 is a side view of a carrying device and a cap opening device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3A is a cross-sectional view taken along the line AA of the main part of the transport device according to the embodiment of the present invention, and FIG. 3B is a side view of the main part.

FIG. 4 is an operation explanatory view in which the first half of the operation of the cap opening device according to the embodiment of the present invention is divided into (a) to (c).

FIG. 5 is an operation explanatory diagram in which the latter half of the operation of the cap opening device according to the embodiment of the present invention is divided into (d) to (f).

[Explanation of symbols]

1: Opening device 2: Transport device 3: Drive sprocket 4: Driven sprocket 5: Endless chain 6: Support stand 7: First string 8: Container 9: Storage case 10: Guide piece 11: Opening means 12: pressing member 13: Engaging claw 14: rocking means 15: Holding means 16: Vertical movement means

Claims (4)

[Claims] 1. An endless transmission material is wound between a drive wheel and a driven wheel, and a storage case for accommodating a container is placed on the upper chord of the endless transmission material pulled by the drive wheel, and the upper chord. In the vicinity of the center between the drive wheel and the driven wheel of the above, a guide piece capable of moving up and down is supported, and a support base is disposed below the vicinity of the center of the upper string, and the guide piece is lowered so that the upper string is The storage case that is slackened below the support base and descends with the upper chord is received by the support base, and the guide string is raised, whereby the upper chord passes above the support base, A carrying device on which a storage case is placed. 2. A cap opening device for removing a lid that closes an opening of a container housed in a storage case, wherein the lid is detached from the container at a position of a support base of the transfer device according to claim 1. A plurality of opening means are arranged in line, and the opening means are arranged so as to correspond to the opening of the container in the storage case received by the support base. 3. The cap opening means presses a fixed portion near the outer periphery of the lid from above, an engaging pawl that engages with another portion near the outer periphery of the lid, and the engaging pawl. 3. A swinging means for swinging a lever to engage or disengage from the lid, a holding means for holding the pressing member and the engaging claw, and a vertical moving means for vertically moving the holding means. The uncapping device described. 4. A step of placing a storage case for storing a container on an upper chord of an endless transmission material wound between a driving wheel and a driven wheel and carrying in the same; and a step between the driving wheel and the driven wheel of the upper chord. Receiving the storage case that descends along with the upper string by lowering the vicinity of the center on a support table installed directly below the storage case; and the vicinity of the center between the drive wheel and the driven wheel of the upper string. And carrying out the storage case on the upper chord of the endless transfer material, which is lifted up from the support base along with the upper chord, and is carried out.