JPH0761553A - Shiftable belt conveyor and moving method thereof - Google Patents

Abstract

PURPOSE:To perform not only movement in the direction of width but also movement along a conveyance direction, to simplify structure, and to prevent the length of a conveyor from being limited. CONSTITUTION:When a shiftable belt conveyor 1 is moved to other place, a belt is released from a stretch state produced by the belt stretch mechanism of a head frame 2 to fasten a conveyor belt 5. With this state, the whole of an intermediate frame 3 is drawn out from a gap between the upper and lower running-round parts of the conveyor belt 5 for removal and by pulling out the rear end part of the conveyor belt 5 supported to a tail frame 4, winding is progressed in a state that the upper and lower running-round parts of the conveyor belt 5 are overlapped with a belt winding device 9 preceded by the tail frame 4. In this way, the belt winding device 9 is moved forward to the head frame 2 side togetherwith the tail frame 4. Finally, an overall length is shortened by intercoupling in series the head frame 2, the tail frame 4, and the belt winding device 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, for transporting excavated earth and sand at a residential land construction site, etc., and a shiftable belt conveyor from an initial installation position to another position depending on the progress of the construction work. And a shiftable belt conveyor.

[0002]

2. Description of the Related Art As a shiftable belt conveyor of this type, a divided conveyor frame is skid.
It has a structure that it is fixed on a round sleeper, each sleeper is connected in series with a rail and an endless belt is wrapped around, and when moving, a part of the rail is clamped and pulled by a heavy machine such as a bulldozer to move it. Things are common.

Besides, for example, Japanese Patent Publication No. 59-11484.
There is a belt conveyor relocation method described in Japanese Patent Publication No. This construction method divides the conveyor frame and connects it with a connecting body, runs the front traveling vehicle along the existing position and the rear traveling vehicle along the relocated position, and equips them between the front and rear traveling vehicles. The belt conveyor is transferred from the existing position to the transfer position by hoisting and moving the divided conveyors continuously by the transfer girder.

Further, as described in Japanese Patent Laid-Open No. 61-263508, there is proposed a belt conveyor equipped with a plurality of shift traveling devices at a lower portion of the belt conveyor so that they can be horizontally swung. There is.

[0005]

However, the above-mentioned conventional shiftable belt conveyor and the method of moving the same have the following inconveniences.

A general shiftable belt conveyor can move in the width direction (horizontal direction), but cannot move in the conveying direction or the oblique direction of the conveyor.

In the relocation method of Japanese Patent Publication No. 59-11484, it is possible to move only in the width direction, it is not possible to move the conveyor in the conveying direction or in the diagonal direction, and the length of the conveyor is structurally limited. There is.

The belt conveyor disclosed in Japanese Patent Laid-Open No. 61-263508 can be moved in all directions, but the cost of the entire apparatus is very high, and it is impossible to swivel in a narrow space, and a small turn is required. Is difficult.

The present invention has been made in view of the above points, and can be moved in a short time even if the width of the moving place is narrow, winding, or there is a height difference, and it can move in the width direction. Not only that, the object of the present invention is to provide a shiftable belt conveyor and a method of moving the conveyor, in which the conveyor can be moved along the conveying direction, the structure is simple, the device is relatively inexpensive, and the conveyor length is not limited. I am trying.

[0010]

In order to achieve the above object, a method of moving a shiftable belt conveyor according to the present invention comprises moving means such as skids and tires, a belt tensioning mechanism and a belt driving mechanism. Head frame, multiple intermediate frames and skids divided and unitized,
A belt tensioning mechanism for the head frame is provided after the endless conveyor belt is rotatably supported in series by each pulley provided on a tail frame provided with a moving means such as a tire to configure the shiftable belt conveyor. To loosen the conveyor belt, remove all of the intermediate frame by pulling it out between the vertical running parts of the endless belt conveyor, and remove the rear end part of the endless conveyor belt supported by the tail pulley of the tail frame. The endless conveyor belt is wound up from the rear end of the belt so that the upper and lower running parts of the endless conveyor belt are superposed on a belt winding device that is equipped with moving means such as skids and tires that is pulled out rearward and that follows the tail frame. And the belt winding device together with the tail frame. The advanced until linkable position to the head frame side, said head frame, said tail frame and the belt retractor coupled to a series in this order, and moves to lead due bulldozer and trucks.

In order to achieve the above object, the shiftable belt conveyor of the present invention comprises: a) a head frame equipped with a moving means such as skids and tires, a belt tensioning mechanism, and a belt driving mechanism, and a frame main body attached and detached. It is provided with a plurality of divided and unitized intermediate frames having freely supporting legs and a tail frame having moving means such as skids and tires, and b) head pulley of the head frame and tension of a belt tensioning mechanism. A pulley, a drive pulley of a belt drive mechanism, a return roller of a leg portion of each intermediate frame, a tail pulley of the tail frame, a carrier roller on a frame body of each intermediate frame,
While supporting the endless conveyor belt so that it can be wound around in a series, and c) each intermediate frame, the frame body is extracted from the vertical running portion of the conveyor belt and is configured to be removable together with the leg portion, The head frame and the tail frame are connectable.

According to a third aspect of the present invention, d) a rear end portion of the belt is provided with a moving means such as a skid or a tire when the belt conveyor is moved, and the vertical running portions of the endless conveyor belt are overlapped with each other. It is desirable to connect a belt retractor capable of retracting from the rear of the tail frame.

As described in claim 4, e) a pair of rails may be laid from the head of the intermediate frame to the tail frame, and the movable hopper may be movably mounted on the rails.

According to a fifth aspect of the present invention, f) the belt winding device is movably mounted on the rail via wheels, and the belt of the belt winding device is utilized by utilizing the rotational force of the wheels. The winding drum can be adapted to rotate.

According to a sixth aspect of the present invention, g) the belt winding device is connected to the tail frame and the belt winding device, and a wire having one end connected to the tip of the tail frame is connected to the belt winding device through a winch and a guide pulley. It may be connected to the rear end of the winch to have an endless structure and moved by rotation of the captance drum of the winch.

[0016]

According to the method of moving the shiftable belt conveyor of the present invention having the above-mentioned structure, in the installed state, the endless conveyor belt can be rotated to convey the earth and sand as in the conventional case, and the installation thereof. When moving from one position to another position, the belt tensioning mechanism of the head frame releases the belt tension to loosen the belt, and in this state, all of the intermediate frame is moved up and down in the endless belt conveyor. The endless conveyor belt supported on the tail frame is pulled out rearward, and the belt winding device following the tail frame is provided with the upper and lower running parts of the endless conveyor belt. Roll them up in layers. Following the winding of the conveyor belt, the belt winding device is advanced to the head frame side together with the tail frame, and finally the head frame, the tail frame and the belt winding device are connected in series to shorten the overall length significantly. Yes (eg 100m
Even with the above belt conveyor, it is shortened to about 30 to 40 m). In this state, for example, by pulling the head frame with a bulldozer, the head frame and the belt winding device can be moved in the conveying direction of the belt conveyor, and the head frame, tail frame, and belt winding device can be moved. Since the connecting portion is bendable and the overall length is shortened, it can be moved without difficulty, for example, even in a zigzag winding narrow land.

After moving to a predetermined position in this way,
While unwinding the conveyor belt that has been taken up by the belt take-up device, gradually move the belt take-up device together with the tail frame from the head frame, insert an intermediate frame between the upper and lower running parts of the conveyor belt, and set the original Return to the state of. Then, if the conveyor belt is tensioned between the head pulley and the tail pulley by the belt tensioning mechanism of the head frame, the sand and the like can be conveyed by rotating the conveyor belt. At this time, the belt winding device is separated from the tail frame.

According to the shiftable belt conveyor of the present invention having the above structure, the moving method of the present invention described above can be carried out, and the structure is simple and the manufacturing cost can be reduced.

In the shiftable belt conveyor according to a third aspect of the present invention, since the belt winding device connectable to the tail frame is provided, the belt conveyor after the intermediate frame is removed when the belt conveyor is moved is endless. In this state, it can be wound around the winding drum of the belt winding device, and the moving operation can be performed easily. Since the belt conveyor according to claim 2 does not have a device for winding the conveyor belt, an operator folds the conveyor belt when moving to use a compact trolley. Need to carry.

In the shiftable belt conveyor according to the present invention, the moving hopper can be easily moved to any position of the belt conveyor along the rail, and the excavated earth and sand is fed from the moving hopper onto the conveyor belt. You can Therefore, it is possible to carry out the excavation work or the like at any position of the belt conveyor to carry the earth and sand or the like onto the conveyor belt.

In the shiftable belt conveyor according to the fifth aspect of the present invention, the belt winding drum is rotated and the conveyor belt is wound only by moving the belt winding device on the rail and moving it forward. A drive device for winding is not required.

In the shiftable belt conveyor according to the present invention, when the winding speed of the belt is about to become higher than the traveling speed of the belt winding device due to the thickening of the conveyor belt wound on the belt winding drum. In addition, the endless wire exerts a backward resistance force on the belt winding device, slipping occurs between the wheel and the rail, the winding speed of the belt is reduced, and the running speed is followed.

[0023]

Embodiments of the shiftable belt conveyor according to the present invention will be described below with reference to the drawings.

FIG. 1 is an overall plan view showing a cutaway portion of a shiftable belt conveyor, FIG. 2 is a side view of FIG. 1, and FIG.
2A is an enlarged side view of the intermediate frame portion of FIG. 2, FIG. 3B is an enlarged perspective view of the intermediate frame portion, and FIG.
FIG. 4 is a sectional view taken along the line cc of FIG.

As shown in FIGS. 1 and 2, the shiftable belt conveyor 1 includes a head frame 2 and a plurality of divided intermediate frames 3, 3, 3 ...
And a tail frame 4. Head frame 2
Is equipped with sled-shaped skids 21 that can slide on the ground at the front and rear portions of the lower surface. Also, at the upper end of its front end,
A head pulley 22 is rotatably supported, and a drive pulley 23 is rotatably supported by a drive motor (not shown) at the lower end of a rear end of the head pulley 22 so as to be rotatable in the forward and reverse directions. Further, a take-up pulley (tension pulley) 24 is provided between the head pulley 22 and the drive pulley 23 so as to be movable in the longitudinal direction and rotatable, and constitutes a so-called belt tensioning mechanism. Although not shown, the head frame 2
A large number of carrier rollers are rotatably provided at intervals along the upper surface of the.

As shown in FIG. 3, each intermediate frame 3 has a.
It is composed of a frame body 31 and a pair of front and rear legs 32, 32. The legs 32 are bolts (not shown) to form the frame body 3.
It is detachably attached to 1. Frame body 31
Above, multiple (5 here) at intervals in the front-back direction
The trough type carrier rollers 33 are mounted via carrier roller stands 34, respectively. The leg portion 32 has a structure in which a pair of left and right legs 35, 35 are connected by a connecting member 36, and a base plate 37 is fixedly attached to the lower end of each leg 35. A return roller 38 is rotatably attached to the upper portion between the legs 35 by a bracket 39. In addition, a part of the base plate 37 of the leg portion 32 is shown in FIG.
As shown in (c), the rail 6 is fixed to the sleeper 61 made of steel plate or shaped steel by a connecting plate 62. As described above, the intermediate frame 3 includes the frame body 31 to the legs 32.
The frame main body 31 can be horizontally withdrawn from between the up-and-down running parts of the conveyor belt 5, which will be described later. To be

As shown in FIG. 2, the tail frame 4 is
A sled-like skid 41 that can slide on the ground is provided on the lower surface, and a tail pulley 42 is rotatably supported at the rear end of the tail frame 4. And the conveyor belt 5
Is wound around the tail pulley 42 from the head pulley 22 via the carrier roller 33, and is turned to pass through the take-up pulley 24 and the drive pulley 23 through the return roller 38 of the leg portion 32 of each intermediate frame 3 and endless. It is connected to the. In this state, the take-up pulley 24 is moved forward to tension the conveyor belt 5, and the drive pulley 23 is rotated to rotate the conveyor belt 5.

The shiftable belt conveyor 1 according to this embodiment is constructed as described above, and is used in the following manner at the time of carrying work. That is, as shown in FIG. 1 and FIG. 2, a pair of rails 6 and 6 are provided along both sides of the intermediate frame 3 at the head to the tail frame 4.
Are laid in parallel. Each rail 6 is fixed on a sleeper 61 arranged in a row in a row at regular intervals. A mobile hopper 7 provided with wheels 71 is movably mounted on the rails 6 and 6. This mobile hopper 7
Earth and sand are put on the conveyor belt 5 via the conveyor belt 5 and conveyed forward by the conveyor belt 5. Therefore, the movable hopper 7 is moved on the rails 6 and 6 as the excavation work position on the residential land moves, for example. In the figure,
Hopper 4 with skirt 43a on tail frame 4
3, the hopper 43 is used when another conveyor is connected to the tail frame 4, so that the mobile hopper 7 is removed at that time.

Next, an apparatus required for moving the above-mentioned shiftable belt conveyor 1 will be described, and a method of moving the same will also be described.

FIG. 4A is a side view of the belt winding device, and FIG.
4B is a cross-sectional view taken along the line bb of FIG. 4A, FIG. 4C is an explanatory view showing a work mode in which the rear end of the conveyor belt is pulled into the belt winding device from above the tail pulley, and FIG. 4D. FIG. 4 is a perspective view showing a winding mechanism of the belt winding device. 5 (a) is a front view schematically showing the work of extracting the frame body of the intermediate frame, and FIG. 5 (b) is a perspective view schematically showing the moving mechanism of the moving carriage. 6 (a) to 6 (e) are side views sequentially showing a work procedure for moving the shiftable belt conveyor of FIG.

As shown in FIGS. 4 (a) and 4 (b), the belt winding device 9 is provided with a pedestal 91 that also serves as a skid, and a pair of support members 92 are provided on both left and right sides of the central portion of the pedestal 91.・ 9
2 are erected. A belt winding drum 93 is rotatably supported between upper ends of the support members 92. At both sides of the drum 93, the retracting shaft 95
Locking portion 94 is opened. That is, as shown in FIG. 4C, the rear end of the conveyor belt 5 is drawn from the tail pulley 42 of the tail frame 4 into the belt winding device 9 through the drawing shaft 95, and the drawing shaft 95 is engaged with the drum 93. The stopper 94 can be locked.

Further, in this example, a movable carriage 8 (see FIG.
(a)) The rotation of the traveling wheels 82 is utilized to make the drum 93
I am trying to rotate. That is, as shown in FIG. 4D, the axle 83 of the wheel 82 is extended to the outside of the wheel 82, and the pulley 84 is integrally rotatably attached to the extension shaft 83a.
The intermediate pulley 86 and the endless belt 85 are connected to each other. The intermediate pulley 86 is rotatably supported by a supporting member 92 by a rotary shaft 87, and another intermediate pulley 88 is integrally rotatably attached to the rotary shaft 87. Further, the drum 93
A pulley 97 is integrally rotatably attached to an end of the drum shaft 96 that passes through the center of the drum shaft 96 and integrally rotates, and the pulley 97 and the intermediate pulley 88 are connected by an endless belt 89.

Further, in this example, a moving carriage 8 for mounting the tail frame 4 and a moving mechanism 110 for the moving carriage 8 for mounting the drum winding device 9 are provided in advance. That is, as shown in FIG. 5 (b), guide pulleys 112 and 113 are rotatably arranged in front of and behind the rails 6 and 6 and are separated from the guide pulleys 112 and 113 by a certain distance. 114 and 115 are rotatably arranged. In addition, a winch 116 is provided at a position approximately midway between the guide pulleys 112 and 114 with its captance drum 117 projecting laterally. Then, one end of the endless wire 111 has a forward moving carriage 8
Is connected to the front end of the guide pulley 112, the endless wire 111 is wound around the captance drum 117 several times, and then the guide pulleys 114, 115.
The moving mechanism 110 is configured by connecting the other end to the rear end of the rear moving carriage 8 via 13 in order. Therefore, by rotating the captance drum 117 of the winch 116, the two movable carriages 8 are moved.
・ 8 moves to one side on rails 6 ・ 6 and reverses the captance drum 117, so that two moving carriages 8
・ 8 moves in the opposite direction on rails 6 ・ 6.

The shiftable belt conveyor 1 is moved according to the following working procedure.

(1) After the movable hopper 7 travels on the rails 6.6 to the rear end, it is lowered from the rails 6.6 and removed. Then, the extension rails 6'and 6'are connected to the rear ends of the rails 6 and two moving carriages 8 and 8 are mounted on the extension rails 6'and both the carriages 8 and 8 are mounted. They are connected via a connecting rod 81 (Fig. 6 (a)).

Take-up pulley 2 of head frame 2
4 to the rear and loosen the conveyor belt 5 (see FIG. 6).
(b)).

(2) For each intermediate frame 3, the leg portion 32
The bolt fixing the frame body 31 at the upper end of is removed to separate the leg portion 32 and the frame body 31. Then, as shown in FIG. 5A, the frame main body 31 is pulled out from between the vertical running portions of the conveyor belt 5 by the forklift 100. The legs 32 are tilted back and forth to lie on the ground or removed.

(3) The front moving carriage 8 is transferred onto the rail 6, and the tail frame 4 is lifted and placed on the moving carriage 8 by a crane (not shown). Further, the belt winding device 9 is hoisted and placed on the rear movable carriage 8.

(4) As shown in FIG. 4 (c), the rear end of the conveyor belt 5 is pulled from the tail pulley 42 of the tail frame 4 into the belt winding device 9 via the pull-in shaft 95, and the pull-in shaft 95 is drummed. It is locked to the locking portion 94 of 93.

(5) As shown in FIG. 5 (b), the front movable carriage 8 is rotated by the winch 116 to rotate the captance drum 117, and is pulled forward by the endless wire 111. As a result, the rear moving carriage 8 moves forward together with the front moving carriage 8 and the drum 93 of the drum winding device 9 rotates to wind the conveyor belt 5 (FIG. 6).
(c)).

(6) Two moving carriages 8.8 are rails 6.6
It runs over and is sent to the front end. During this time, the drum 93 of the drum winding device 9 rotates to wind the conveyor belt 5 (FIG. 6 (d)).

(7) Head frame 2 and tail frame 4
Are connected by a connecting rod 122, the head frame 2 is pulled by a bulldozer (not shown), and the tail frame 4 and the drum winding device 9 are moved from the moving carriage 8.8 on the rails 6 and 6.
Are lowered onto the ground, and the tail frame 4 and the drum winding device 9 are connected by the connecting rod 121. After that, it is pulled by a bulldozer and slid on the ground while the head frame 2, the tail frame 4, and the drum winding device 9 are connected, and moves to a predetermined place (FIG. 6 (e)).

After moving to a predetermined place, the head frame 2 is fixed at a fixed position by using an anchor block (not shown), and the rails 6 and 6 are laid behind the head block 2 to perform the above-mentioned movement work. The tail frame 4 and the belt winding device 9 are gradually separated from the head frame 2 in the order completely reverse to the procedure, and finally the rear end of the conveyor belt 5 is wound around the tail pulley of the tail frame 4, If the take-up pulley 24 is moved forward and the conveyor belt 5 is tensioned, it can be returned to the original carrying work state.

The shiftable belt conveyor and the method of moving the same according to the present invention have been described above, but the present invention is not limited to this, and the invention can be carried out as follows, for example.

(A) If tires are used as the moving means of the tail frame 4 and the belt winding device 9 instead of the skids 41 and 91, when the head frame 2 is towed and moved by a heavy machine such as a bulldozer, it will turn. Becomes easier and less restricted by the shift direction.

(B) The drum 93 of the belt winding device 9
The rotation may be performed using a drive motor.

(C) When the rail 6 is not laid along the conveyor, the wheels 82 of the moving carriage 8 are replaced by tire type or skid type so that the vehicle can run on the ground.

[0048]

As is apparent from the above description,
The shiftable belt conveyor and the method of moving the same according to the present invention have the following excellent effects.

1) According to the moving method of claim 1, even for a conveyor having a length of, for example, 100 m or more, the conveyor belt is moved while the endless state of the conveyor belt is maintained while the overall length is shortened (about 30 to 40 m). Since it can be moved, even if the width of the moving place is narrow, winding, or there is a height difference, it can be moved in a short time, and not only in the width direction, but also in the conveyor conveying direction. It is also possible to move along.

2) In the shiftable belt conveyor according to the second aspect, the moving method of the present invention can be implemented, the structure is simple, the manufacturing cost of the apparatus is relatively low, and the length of the conveyor is long. Nor is it limited.

3) In the shiftable belt conveyor according to claim 3, the belt conveyor after the intermediate frame is removed when the belt conveyor is moved is wound around the winding drum of the belt winding device in an endless state. Therefore, the moving work can be easily performed.

4) In the shiftable belt conveyor according to the fourth aspect, it is possible to easily carry earth and sand or the like onto the conveyor belt by performing excavation work or the like at an arbitrary site along the longitudinal direction of the belt conveyor. it can.

5) In the shiftable belt conveyor according to the fifth aspect of the present invention, since the drive device for winding the belt can be omitted, the structure of the belt winding device can be simplified and the size and weight can be easily reduced.

6) In the shiftable belt conveyor according to the sixth aspect, even if the belt on the belt winding drum becomes thick, the endless wire exerts a backward resistance force on the belt winding device. The slippage between the wheels and the rail reduces the belt winding speed, which is almost the same as the running speed.

[Brief description of drawings]

FIG. 1 is an overall plan view showing a shiftable belt conveyor according to an embodiment of the present invention with a part cut away.

FIG. 2 is a side view of the shiftable belt conveyor of FIG.

3 (a) is an enlarged side view showing the intermediate frame part of FIG. 2, FIG. 3 (b) is an enlarged perspective view of the intermediate frame, and FIG. 3 (c) is FIG. 6 is a sectional view taken along line cc of FIG.

4 (a) is a side view of the belt retractor, FIG. 4 (b).
4A is a sectional view taken along the line bb in FIG. 4A, FIG. 4C is an explanatory view showing a work mode in which the rear end of the conveyor belt is pulled into the belt winding device from above the tail pulley, and FIG. It is a perspective view which shows the winding mechanism of a winding device.

FIG. 5 (a) is a frame body 31 of the intermediate frame 3.
FIG. 5B is a perspective view schematically showing the moving mechanism of the moving carriage 8 and FIG.

6 (a) to 6 (e) are side views showing, in order, work procedures for moving the shiftable belt conveyor 1 of FIG.

[Explanation of symbols]

 1 Shiftable Belt Conveyor 2 Head Frame 3 Intermediate Frame 4 Tail Frame 5 Conveyor Belt 6 Rail 8 Moving Carriage 9 Drum Winding Device 22 Head Pulley 23 Drive Pulley 24 Take Up Pulley (Tension Pulley) 31 Frame Main Body 32 Legs

Claims (6)

[Claims] 1. A method for moving a shiftable belt conveyor from one position to another position, wherein a head frame provided with moving means such as skids and tires, a belt tensioning mechanism, and a belt driving mechanism is divided into units. After constructing the shiftable belt conveyor, the endless conveyor belt is rotatably supported in series by each pulley provided on each of the plurality of intermediate frames and the tail frame provided with the moving means such as skids and tires. The belt tensioning mechanism of the head frame is released to loosen the conveyor belt, and all of the intermediate frame is extracted and removed from between the vertical running parts of the endless belt conveyor, and is supported by the tail pulley of the tail frame. Pull the rear end of the endless conveyor belt backward
Following the tail frame, a skid, a belt winding device provided with a moving means such as a tire, while winding the belt from the rear end portion of the endless conveyor belt so as to overlap the vertical running portion, The belt take-up device together with the tail frame is advanced to a position where it can be connected to the head frame side, the head frame, the tail frame and the belt take-up device are connected in series in this order and pulled by a bulldozer or a truck. A method for moving a shiftable belt conveyor, which is characterized by moving the belt. 2. A head frame having a moving means such as skids and tires, a belt tensioning mechanism, and a belt driving mechanism, and a plurality of divided intermediate frames each having a leg portion for detachably supporting the frame body. And a tail frame provided with moving means such as skids and tires, a head pulley of the head frame, a tension pulley of a belt tensioning mechanism, a drive pulley of a belt driving mechanism,
A series of endless conveyor belts are wound around the return rollers of the legs of the intermediate frames, the tail pulleys of the tail frames, and the carrier rollers of the frame bodies of the intermediate frames so as to be rotatable, The frame is a shiftable belt conveyor characterized in that the frame main body is pulled out from the vertical running portion of the conveyor belt and is removable with the legs, and the head frame and the tail frame are connectable. . 3. A belt winding device that is provided with a moving means such as a skid or a tire when the belt conveyor is moved, and can be wound from a rear end portion of the belt by overlapping upper and lower running portions of the endless conveyor belt. The shiftable belt conveyor according to claim 2, wherein a device is connected to the rear of the tail frame. 4. The shiftable belt conveyor according to claim 3, wherein a pair of rails are laid from the top of the intermediate frame to the tail frame, and a movable hopper is movably mounted on the rails. 5. The belt winding device is movably mounted on the rails via wheels, and the belt winding drum of the belt winding device is rotated by utilizing the rotational force of the wheels. The shiftable conveyor according to claim 4, wherein 6. An endless structure in which a wire connecting the tail frame and the belt winding device and having one end connected to the tip of the tail frame is connected to the rear end of the belt winding device via a winch and a guide pulley. The shiftable conveyor according to claim 5, wherein the shiftable conveyor has a structure and is moved by rotation of the captance drum of the winch.