JP7339770B2 - chute device - Google Patents

Description

The present invention relates to a chute device provided in a stacker.

Bulk materials such as limestone, iron ore, and coal are sometimes conveyed while being relayed by a plurality of conveyors. A stacker is known as a cargo handling machine for such transportation (see, for example, Patent Document 1). The stacker has a boom conveyor. The boom conveyor is configured to be capable of turning motion about a vertical axis and raising and lowering motion about a horizontal axis. This boom conveyor conveys the bulk material conveyed by the tripper conveyor to the yard from the tip of the boom conveyor.

The stacker described in Patent Document 1 is provided with a tripper chute and a skirt between the tripper conveyor and the boom conveyor.

The tripper chute is a cylindrical member and forms a passage through which loose objects conveyed by the tripper conveyor fall. A skirt is installed on the boom conveyor side and wraps around the lower end of the tripper chute. The skirt is formed in an arch shape when viewed from the side. A seal cover member is arranged between the tripper chute and the skirt. This seal cover member is attached to the tripper chute. With this configuration, the skirt moves up and down with respect to the seal cover member as the boom conveyor moves up and down. As a result, the skirt and the seal cover member suppress scattering of the dust generated from the loose objects falling from the tripper chute.

Japanese Utility Model Laid-Open No. 63-154544

In the configuration described in Patent Literature 1, the tripper chute performs neither a turning motion nor an elevation motion, while the skirt performs a turning motion and an elevation motion. Therefore, the amount of movement of the skirt with respect to the tripper chute increases. Therefore, it is necessary to increase the shape of the seal cover member.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to reduce the size of a seal member in a chute device provided in a stacker.

The gist of the present invention is the following chute device.

(1) A chute device provided in a stacker having a boom conveyor capable of turning motion about a vertical axis and raising and lowering motion as a rocking motion about a horizontal axis,
a head chute through which bulk objects falling onto the boom conveyor pass through while both the turning motion and the elevation motion are regulated;
an intermediate chute fitted to the head chute so as to enable the turning motion while restricting the elevation motion and allow the bulk objects that have passed through the head chute to pass through;
a skirt arranged so as to surround the circumference of the intermediate chute and the circumference of the portion of the boom conveyor where the bulk items fall from the intermediate chute, and performing the elevating action in conjunction with the boom conveyor;
It has

(2) further comprising a lid arranged around the intermediate chute;
The chute device according to (1), wherein the skirt includes an opening through which the bulk material passes and the lid is fitted.

(3) The chute device according to (2), wherein the intermediate chute is fitted around the outer periphery of the head chute, and the lid is arranged to surround the outer periphery of the intermediate chute.

According to the present invention, the size of the seal member can be made smaller in the chute device provided in the stacker.

FIG. 1 is a schematic side view of a stacker equipped with a chute device according to one embodiment of the present invention. FIG. 2 is a schematic side view of the vicinity of the chute device, showing a state in which the boom conveyor is tilted. FIG. 3 is a schematic side view around the chute device, showing a state in which the boom conveyor is horizontal. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. FIG. 5 is a view of the chute device as seen in the longitudinal direction of the boom conveyor, with a partial cross section. 6 is an enlarged view of a part of FIG. 5. FIG. 7 is an enlarged view of a part of FIG. 6. FIG.

EMBODIMENT OF THE INVENTION Hereinafter, it demonstrates, referring drawings for the form for implementing this invention.

FIG. 1 is a schematic side view of a stacker 1 equipped with a chute device 3 according to an embodiment of the invention. FIG. 2 is a schematic side view of the vicinity of the chute device 3, showing a state in which the boom conveyor 4 is tilted. FIG. 3 is a schematic side view of the chute device 3 and its surroundings, showing a state in which the boom conveyor 4 is horizontal. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. FIG. 5 is a view of the chute device 3 as seen in the longitudinal direction X of the boom conveyor 4, and shows a part thereof in cross section. 6 is an enlarged view of a part of FIG. 5. FIG. 7 is an enlarged view of a part of FIG. 6. FIG.

Referring to FIGS. 1 to 7, stacker 1 uses chute device 3 to receive bulk objects 100 transported from a transport ship or the like to tripper conveyor 2 via a ground conveyor or the like, onto boom conveyor 4, and It is used to deliver the bulk material 100 from the tip 4a of the boom conveyor 4 to the yard. The chute device 3 provided in the stacker 1 may be applied not only to the stacker but also to other cargo handling devices. Examples of bulk materials 100 transported by the stacker 1 include massive limestone, iron ore, and coal.

The stacker 1 has a main frame 5 , a tripper conveyor 2 , a chute device 3 , a boom conveyor 4 , a boom 6 and a swivel floor 7 .

The main frame 5 is made of steel and steel plate, and constitutes the skeleton of the stacker 1 . A plurality of wheels 8 are attached to the lower end of the main frame 5 . Each wheel 8 is mounted on a rail (not shown). With this configuration, the stacker 1 can reciprocate on the rail. A tripper conveyor 2 is arranged on the main frame 5 .

The tripper conveyor 2 is a rubber belt on which bulk objects 100 conveyed by a conveyor (not shown) are placed. The tripper conveyor 2 receives the bulk material 100 at a position on the rear end side of the main frame 5 and conveys the bulk material 100 to the chute device 3 . Then, the tripper conveyor 2 delivers the bulk objects 100 to a head chute 21 of the chute device 3, which will be described later. The chute device 3 drops the bulk object 100 onto the boom conveyor 4 .

The boom conveyor 4 is an endless rubber belt, and conveys bulk objects 100 from the bottom end 4b of the chute device 3 to the tip 4a of the boom conveyor 4. As shown in FIG. The boom conveyor 4 is supported by a plurality of rollers 9 and rotationally driven by the rotation of drive rollers included in the plurality of rollers 9 . The boom conveyor 4 is supported by rollers 9 so as to elongate in a predetermined longitudinal direction X. As shown in FIG.

In addition, below, the longitudinal direction X of the boom conveyor 4 is only called the longitudinal direction X. As shown in FIG. A width direction Y perpendicular to the longitudinal direction X is simply referred to as a width direction Y. A height direction Z perpendicular to the width direction Y is simply referred to as a height direction Z.

The roller 9 is supported by the boom 6 via a roller holder or the like. The boom 6 is a structure extending in the longitudinal direction X and is made of, for example, steel and steel plates. In this embodiment, boom 6 includes a truss structure. A chute device 3 is arranged at the proximal end of the boom 6 (the proximal end 4b of the boom conveyor 4). At the tip of the boom 6 (the tip 4a of the boom conveyor 4), bulk objects 100 are dropped from the boom conveyor 4 to the yard. Boom 6 is supported on swivel floor 7 .

The swivel floor 7 is a floor member that can swivel (swing) about a predetermined vertical axis S1 with respect to the main frame 5 . The swivel bed 7 is connected to a power source such as an electric motor (not shown) or a diesel engine so as to be able to transmit power, and receives power from the power source to swivel around the vertical axis S1. The swivel floor 7 is supported by the main frame 5 via bearings (not shown). The revolving floor 7, the boom 6 and the boom conveyor 4 rotate integrally around the vertical axis S1.

The boom 6 and the boom conveyor 4 are configured to be capable of raising and lowering motion as swinging motion about a predetermined horizontal axis 10 with respect to the revolving floor 7 . Specifically, as best shown in FIG. 5, the boom 6 is mounted via a pair of base blocks 11, 11 aligned in the width direction Y and a pair of horizontal shafts 10, 10 aligned in the width direction Y. It is supported on the revolving floor 7 so that it can be raised and lowered. The base blocks 11,11 are fixed to the revolving floor 7 and support the horizontal shafts 10,10. The horizontal shafts 10, 10 are connected to boom bottoms 6a, 6a as bottom portions of the boom 6, and support the boom 6 so that it can be raised and lowered around the horizontal shafts 10, 10. As shown in FIG.

With the above configuration, the revolving floor 7 revolves around the vertical axis S1 but does not raise or lower. On the other hand, the boom 6 and the boom conveyor 4 perform turning motions about the vertical axis S1 and elevation motions about the horizontal axes 10,10.

Next, a more specific configuration of the chute device 3 will be described.

The chute device 3 is provided to drop the bulk objects 100 conveyed by the tripper conveyor 2 to the vicinity of the base end 4b of the boom conveyor 4, as described above.

The chute device 3 includes a chute 20 including a head chute 21 and an intermediate chute 22, a turning seal member 23 for the intermediate chute 22, a head chute support 24, an intermediate chute support 25, a skirt 26, and a skirt support 27. , a slide lid 28 , a lifting seal member 29 for the slide lid 28 , a guide mechanism 30 for the slide lid 28 , and a centering mechanism 31 for the slide lid 28 .

The chute 20 forms a passage through which the loose objects 100 falling from the tripper conveyor 2 to the boom conveyor 4 pass. The chutes 20 are arranged in the upper and middle portions of the chute device 3 in the height direction Z. As shown in FIG.

The head chute 21 is a cylindrical portion arranged at the upper end of the chute device 3 . The head chute 21 is fixed to the main frame 5 using a head chute support 24 made of steel or the like. Both supine movements are restricted. A part of the side wall of the head chute 21 is notched, and the tip of the tripper conveyor 2 is inserted into this notched part. The upper end portion of the head chute 21 is formed in a cylindrical shape with constant inner and outer diameters. An intermediate portion of the head chute 21 is formed in a tubular shape, the opening area of which decreases as it goes downward. A lower end portion 21a of the head chute 21 is formed in a cylindrical shape with constant inner and outer diameters. An intermediate chute 22 is fitted to the outer peripheral portion of the lower end portion 21 a of the head chute 21 .

The intermediate chute 22 is a cylindrical member through which the bulk material 100 that has passed through the head chute 21 passes. In this embodiment, the intermediate chute 22 is arranged on the outer peripheral side of the lower end portion 21a of the head chute 21 and surrounds the lower end portion 21a. The intermediate chute 22 is configured so as to be capable of turning, but is restricted from being raised or lowered. The intermediate chute 22 is supported by an intermediate chute support 25 made of steel or the like.

The intermediate chute support 25 allows the intermediate chute 22 to rotate about the vertical axis S1 (rotating motion of the intermediate chute 22), while restricting the elevation motion of the intermediate chute 22 about the horizontal axis . Specifically, the intermediate chute support 25 includes a plurality of beams 32 fixed to the outer periphery of the intermediate chute 22 and arranged in the width direction Y, and a plurality of pillars 33 extending downward from the corresponding beams 32 and fixed to the revolving floor 7 . and have The intermediate chute 22 is fitted to the lower end portion 21a of the head chute 21 with a gap therebetween by the intermediate chute support 25 having the above configuration. A turning seal member 23 is arranged between the inner peripheral surface of the intermediate chute 22 and the outer peripheral surface of the head chute 21 .

The turning seal member 23 is formed using a material having flexibility (elasticity) such as natural rubber or synthetic rubber. The turning seal member 23 seals between the inner peripheral surface of the intermediate chute 22 and the outer peripheral surface of the lower end portion 21 a of the head chute 21 . The turning seal member 23 is formed in a flat sheet shape in this embodiment. In this embodiment, the turning seal member 23 is attached to the intermediate chute 22 and slides against the lower end portion 21 a of the head chute 21 as the intermediate chute 22 turns. More specifically, the turning seal member 23 is formed in an annular shape, and the outer peripheral portion thereof is fixed to the upper end portion of the intermediate chute 22 using fastening members such as bolts and nuts. The outer peripheral portion of the turning seal member 23 covers the entire outer peripheral surface of the intermediate chute 22 . The inner peripheral portion of the turning seal member 23 functions as a lip and contacts the outer peripheral surface of the lower end portion 21a of the head chute 21 over the entire circumference. This configuration prevents dust from scattering through the gap between the head chute 21 and the intermediate chute 22 .

In this embodiment, the configuration in which the turning seal member 23 is attached to the intermediate chute 22 is described as an example, but this need not be the case. For example, the swivel seal member 23 may be attached to the head chute 21, and the intermediate chute 22 and the swivel seal member 23 may be brought into contact so as to slide about the vertical axis S1. A skirt 26 is arranged below the intermediate chute 22 .

The skirt 26 is arranged so as to surround the circumference of the intermediate chute 22 and the circumference of the drop area 34 of the boom conveyor 4 where the loose objects 100 drop from the intermediate chute 22 . take action. As a result, the skirt 26 prevents the dust from the loose objects 100 that have fallen into the drop area 34 from scattering to the outside of the skirt 26 . The skirt 26 is arranged directly above the boom conveyor 4 in the vicinity of the base end 4 b of the boom conveyor 4 .

In this embodiment, the skirt 26 is elongated in the longitudinal direction X, and at least a portion into which the intermediate chute 22 is inserted is open in the height direction Z. More specifically, the skirt 26 extends linearly in the longitudinal direction X and does not undulate in the height direction Z when viewed from the side (viewed from the width direction Y orthogonal to the longitudinal direction X). That is, the upper end edge and the lower end edge of the skirt 26 extend parallel or substantially parallel to the longitudinal direction X, and the position in the height direction Z is constant.

The skirt 26 has a pair of side walls 35, 36 arranged symmetrically in the width direction Y when viewed from the longitudinal direction X, and a ceiling wall 37 provided at the upper ends of the pair of side walls 35, 36. there is

The pair of side walls 35 and 36 extend downward from a position higher than the lower end surface of the intermediate chute 22 in the height direction Z, and the lower ends of the pair of side walls 35 and 36 are close to the boom conveyor 4. are placed. The distance between the lower ends of the pair of side walls 35 and 36 and the boom conveyor 4 is appropriately set according to the transport amount of the bulk material 100 per unit time. When viewed in the longitudinal direction X, the upper half portions 35a and 36a of the pair of side walls 35 and 36 are tapered so that the distance therebetween narrows downward. The upper half portions 35a, 36a of the pair of side walls 35, 36 are arranged so as to sandwich the lower end portion 22a of the intermediate chute 22 therebetween. On the other hand, when viewed in the longitudinal direction X, the lower half portions 35b, 36b of the pair of side walls 35, 36 are spaced apart from each other at a constant interval. In this embodiment, the intermediate chute 22 is not arranged between the lower half portions 35b and 36b. In the longitudinal direction X, the pair of side walls 35 and 36 extend from a position near the base end 4b of the boom conveyor 4 to a position closer to the tip 4a of the boom conveyor 4 than the head chute 21 is.

The ceiling wall 37 is formed at the upper ends of the upper half portions 35a and 36a, extends in the longitudinal direction X, and is arranged over the entire area of the pair of side walls 35 and 36 in the longitudinal direction X. As shown in FIG. It should be noted that end walls that close the ends of the space in the skirt 26 in the longitudinal direction X may or may not be provided at both ends of the skirt 26 in the longitudinal direction X. FIG. The ceiling wall 37 is provided with a through-hole that penetrates the ceiling wall 37 in the height direction Z, thereby forming an opening 37a. The lower end portion 22a of the intermediate chute 22 is inserted into the opening 37a, and the bulk objects 100 pass therethrough. In this embodiment, the opening 37a is formed in a rectangular shape elongated in the longitudinal direction X when viewed from above (as seen from the height direction Z). This opening 37a is an opening through which the loose objects 100 fall and the slide lid 28 runs along. The length of the opening 37a in the longitudinal direction X is set so as to allow the skirt 26 and the intermediate chute 22 to move relative to each other when the boom conveyor 4 is raised and lowered. More specifically, the length of the opening 37 a in the longitudinal direction X is set larger than the outer diameter of the lower end 22 a of the intermediate chute 22 . The skirt 26 having the structure described above is supported by a skirt support 27 .

The skirt support 27 supports the skirt 26 so that the skirt 26 can be swiveled about the vertical axis S<b>1 and raised and lowered about the horizontal axis 10 . Specifically, the skirt support 27 includes a plurality of beams 38 fixed to the upper half portions 35a, 36a of the pair of side walls 35, 36 of the skirt 26 and arranged in the width direction Y and the longitudinal direction X, and downward from the corresponding beams 38. and a pair of pillars 39 supported by the boom 6 so as to be able to swing about the horizontal axis 10. A sliding lid 28 is arranged above the skirt 26 and the skirt support 27 .

The slide lid 28 is provided to close the gap between the opening 37a of the skirt 26 and the outer peripheral portion of the intermediate chute 22. As shown in FIG. A slide lid 28 is arranged around the intermediate chute 22 . The slide lid 28 is configured to slide straight in the longitudinal direction X with respect to the skirt 26 as the skirt 26 moves upward. The slide lid 28 is arranged to cover the opening 37a of the skirt 26 from above. The slide lid 28 is arranged so as to surround the outer peripheral portion of the intermediate chute 22 and is formed in the shape of a flat plate extending in the longitudinal direction X. As shown in FIG. The slide lid 28 extends along the opening 37 a of the top wall 37 of the skirt 26 . In side view, the slide lid 28 is formed in a straight line extending in the longitudinal direction X, and in plan view, is formed in a rectangular shape so as to cover at least part of the top wall 37 of the skirt 26 . The slide lid 28 is formed with an opening 28a. The opening 28 a is an opening into which the intermediate chute 22 is inserted, and is formed in a rectangular or circular shape in plan view to surround the outer peripheral portion of the intermediate chute 22 . The slide lid 28 is restricted from moving relative to the intermediate chute 22 in the longitudinal direction X by a centering mechanism 31 . Therefore, the gap between the opening 28a of the slide lid 28 and the intermediate chute 22 is made as small as possible. Between the opening 28a of the slide lid 28 and the outer periphery of the lower end 22a of the intermediate chute 22, an elevation seal member 29 is arranged.

The lying-down sealing member 29 is formed using a material having flexibility (elasticity) such as natural rubber or synthetic rubber. The elevation seal member 29 seals between the opening 28 a of the slide lid 28 and the outer peripheral surface of the lower end 22 a of the intermediate chute 22 . In this embodiment, the elevation seal member 29 is attached to the slide lid 28 and slides on the outer peripheral surface of the intermediate chute 22 as the slide lid 28 is raised and lowered with respect to the intermediate chute 22 . More specifically, the elevation seal member 29 is formed in an annular shape, a rectangular annular shape, or the like in accordance with the shape of the opening 28 a , and its outer peripheral portion is fixed to the upper portion of the slide lid 28 . The elevation seal member 29 seals the space between the opening 28a of the slide lid 28 and the outer peripheral surface of the intermediate chute 22 over the entire circumference of the centering mechanism 31 except for a portion where a vertical rail 54 (described later) of the centering mechanism 31 is arranged. or only partially closed. The inner peripheral portion of the elevation seal member 29 functions as a lip and contacts the outer peripheral surface of the intermediate chute 22 . This configuration prevents dust from scattering through the gap between the opening 28 a of the slide lid 28 and the intermediate chute 22 .

In this embodiment, the configuration in which the sealing member 29 for lying down is attached to the slide lid 28 is described as an example, but this need not be the case. For example, the elevation seal member 29 may be attached to the intermediate chute 22, and the slide lid 28 and the elevation seal member 29 may be slidably brought into contact with each other.

Next, the configurations of the guide mechanism 30 and the centering mechanism 31 as mechanisms that regulate the operation of the slide lid 28 will be described.

The guide mechanism 30 is a mechanism for smoothly moving the skirt 26 and the slide lid 28 relative to each other in the longitudinal direction X as the skirt 26 and the slide lid 28 are raised and lowered with respect to the intermediate chute 22 . The guide mechanisms 30 are arranged at both ends of the skirt 26 in the width direction Y in this embodiment. The guide mechanism 30 is a rail-type mechanism.

The guide mechanism 30 includes, for example, a pair of first stays 41, 41 formed in an L shape and fixed to the slide lid 28, and a pair of first stays 41 attached to the corresponding first stays 41 using first bolts 42 or the like. 1 rollers 43, 43 and a pair of horizontal rails 44, 44 fixed to the skirt support 27 provided as tracks on which the corresponding first roller 43 rolls.

The first stays 41 are arranged at both ends of the slide lid 28 in the width direction Y, and are provided at a plurality of locations (four locations in this embodiment, eight in total) at intervals in the longitudinal direction X. The first roller 43 is rotatable around an axis (first bolt 42 ) parallel to the horizontal shaft 10 . Each first roller 43 is formed with an annular groove having a V-shaped cross section, and this groove is fitted in the horizontal rail 44 . The horizontal rail 44 is fixed to the beam 38 of the skirt support 27 on the side of the skirt 26 and supported in an upward posture. The horizontal rail 44 extends straight in the longitudinal direction X and allows the first roller 43 to roll as the skirt 26 and the slide lid 28 are raised and lowered.

The centering mechanism 31 is provided to keep the position of the slide lid 28 relative to the chute 20 constant in the longitudinal direction X, as described above. The centering mechanism 31 is arranged in the middle of the intermediate chute 22 in the longitudinal direction X. As shown in FIG. Also, the centering mechanism 31 is arranged to avoid the location where the first roller 43 is arranged.

The centering mechanism 31 includes a pair of second stays 51, 51 fixed to the slide lid 28, a pair of second rollers 53, 53 attached to the corresponding second stays 51 using a second bolt 52 or the like, A pair of vertical rails 54 , 54 fixed to the outer peripheral surface of the intermediate chute 22 are provided as tracks on which the corresponding second rollers 53 roll.

The second stay 51 is arranged near the opening 28a of the slide lid 28 in the width direction Y. As shown in FIG. The second roller 53 is rotatable around an axis (second bolt 52 ) parallel to the horizontal shaft 10 . Each second roller 53 is fitted on a corresponding longitudinal rail 54 . The vertical rails 54 are fixed to the intermediate chute 22 at both ends of the intermediate chute 22 in the width direction Y and extend in the height direction Z. As shown in FIG. In this embodiment, each vertical rail 54 is formed using a pair of plate-like members arranged in the longitudinal direction X, and the second roller 53 is fitted between the pair of plate-like members. The vertical rails 54 allow the second rollers 53 to roll as the skirt 26 and the slide lid 28 are raised and lowered.

The schematic configuration of the stacker 1 has been described above.

In the stacker 1 described above, when the boom conveyor 4, the skirt support 27, the skirt 26, and the slide lid 28 are raised and lowered around the horizontal axis 10 by raising the boom 6, the slide lid 28 is raised against the skirt 26. Move in the longitudinal direction X. At this time, the first roller 43 of the guide mechanism 30 rolls on the horizontal rail 44 . The slide lid 28 slides in the longitudinal direction X while keeping the opening 37a of the skirt 26 closed. As the slide lid 28 slides, the second roller 53 is guided by the vertical rail 54 and changes its position in the height direction Z with respect to the intermediate chute 22. does not move. That is, the slide lid 28 to which the second roller 53 is attached does not move in the longitudinal direction X with respect to the intermediate chute 22 .

As described above, according to the present embodiment, the provision of the slide lid 28 can prevent the dust from the bulk material 100 from scattering from between the skirt 26 and the intermediate chute 22 . In addition, the slide lid 28 slides in the longitudinal direction X of the boom conveyor 4 with respect to the skirt 26 as the skirt 26 is raised and lowered. According to this configuration, the slide lid 28 has a small amount of movement in the height direction Z orthogonal to the longitudinal direction X during the raising and lowering operation. For example, in the case of an arch-shaped lid with the horizontal axis 10 as the center of curvature, the lid moves significantly in the height direction as the elevation is performed. By setting the direction of movement of the slide lid 28 in the longitudinal direction X in this manner, the amount of movement of the slide lid 28 in the height direction Z can be reduced, so that the installation space for the slide lid 28 can be reduced. Moreover, since it is not necessary to form the slide lid 28 in an arch shape with the horizontal axis 10 as the center of curvature, the lengths of the slide lid 28 and the skirt 26 in the height direction Z can be shortened. Therefore, a more compact chute device 3 can be realized. Furthermore, since the overall length of the chute device 3 in the height direction Z can be shortened, the drop distance of the loose objects 100 falling from the tripper conveyor 2 to the boom conveyor 4 can be shortened. As a result, the impact applied to the bulk material 100 can be reduced, so that the generation of dust itself from the bulk material 100 can be suppressed. Furthermore, since the height from the ground to the head chute 21 can be made shorter, the lifting height of the bulk object 100 from the ground to the head chute 21 can be reduced. As a result, the inclination angle of the tripper conveyor 2 can be made smaller, so that the tripper conveyor 2 can be in a more horizontal posture. Therefore, the amount of bulk objects 100 placed on the tripper conveyor 2 at one time can be increased. That is, it is possible to improve the carrying capacity of the stacker 1 as well.

Further, according to the present embodiment, the skirt 26 and the slide lid 28 extend linearly along the longitudinal direction X when viewed from the side in the width direction Y orthogonal to the longitudinal direction X of the boom conveyor 4 . With this configuration, the space occupied by the skirt 26 and the slide lid 28 in the height direction Z and the movable range in the height direction Z can be made smaller.

Further, according to this embodiment, a flexible elevation seal member 29 is provided for sealing between the opening 28 a of the slide lid 28 and the outer peripheral portion of the chute 20 . According to this configuration, the amount of movement of the skirt 26 and the slide lid 28 is made smaller, and as a result, the clearance that must be sealed by the elevation seal member 29 can also be made smaller. As a result, it is possible to further reduce the degree to which dust from the bulk material 100 scatters.

Further, according to this embodiment, the centering mechanism 31 maintains the position of the slide lid 28 with respect to the intermediate chute 22 with respect to the longitudinal direction X. With this configuration, the sliding lid 28 can be substantially immovable relative to the intermediate chute 22 in the longitudinal direction X. As shown in FIG. As a result, the gap that needs to be sealed by the elevation seal member 29 can be made smaller. Also, the movable range of the slide lid 28 can be further limited.

Further, according to the present embodiment, the head chute 21 is restricted both in turning motion and elevation motion, while the intermediate chute 22 is configured to be capable of turning motion and restricted in elevation motion. Furthermore, the skirt 26 is arranged so as to surround the circumference of the intermediate chute 22 and the circumference of the drop area 34 of the boom conveyor 4 where the bulk material 100 falls from the intermediate chute 22, and is interlocked with the boom conveyor 4. Perform supine motion. According to this configuration, the head chute 21 and the intermediate chute 22 rotate relatively, but do not rise and fall about the horizontal axis 10 relative to each other. As a result, the swivel seal member 23 only needs to allow the relative swivel of the head chute 21 and the intermediate chute 22, so that the swivel seal member 23 can be made small.

Further, according to this embodiment, the elevation seal member 29 is arranged between the intermediate chute 22 and the slide lid 28 with respect to the opening 37 a of the skirt 26 . According to this configuration, the slide lid 28 does not slide in the longitudinal direction X, although it moves upward with respect to the intermediate chute 22 . Therefore, the range to be sealed by the elevation seal member 29 can be made smaller. As a result, the elevation seal member 29 can be made smaller.

Further, according to this embodiment, the intermediate chute 22 is fitted to the outer peripheral portion of the head chute 21 , and the slide lid 28 is arranged so as to surround the outer peripheral portion of the intermediate chute 22 . According to this configuration, since the lower members of the chute 20 are arranged closer to the outer periphery, the configuration can be made simpler. In addition, the turning seal member 23 and elevation seal member 29 having small shapes can more effectively suppress scattering of dust from the chute device 3 .

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The present invention can be modified in various ways within the scope of the claims.

INDUSTRIAL APPLICABILITY The present invention can be widely applied as a chute device.

1 stacker 3 chute device 4 boom conveyor 10 horizontal shaft 21 head chute 22 intermediate chute 26 skirt 28 slide lid (lid)
37 Skirt opening 100 Bulk object S1 Vertical axis

Claims (3)

A chute device provided in a stacker having a boom conveyor capable of turning motion about a vertical axis and raising and lowering motion as a rocking motion about a horizontal axis,
a head chute through which bulk objects falling onto the boom conveyor pass through while both the turning motion and the elevation motion are regulated;
an intermediate chute fitted to the head chute so as to enable the turning motion while restricting the elevation motion and allow the bulk objects that have passed through the head chute to pass through;
a skirt arranged so as to surround the circumference of the intermediate chute and the circumference of the portion of the boom conveyor where the bulk items fall from the intermediate chute, and performing the elevating action in conjunction with the boom conveyor;
a slide lid positioned around the intermediate chute;
with
the skirt includes an opening through which the bulk material passes and over which the slide lid extends;
The slide lid is fitted to the intermediate chute, and slides with respect to the skirt in the longitudinal direction of the boom conveyor as the skirt performs the elevation action,
further comprising a centering mechanism for maintaining a constant position of the slide lid relative to the intermediate chute with respect to the longitudinal direction;
The centering mechanism includes a centering roller connected to the slide lid, and a centering roller fixed to the intermediate chute and formed along the height direction of the intermediate chute as the slide lid moves in the height direction. a longitudinal rail for guiding the rotational movement of the
A chute device , wherein a pair of the vertical rails are provided so as to sandwich the centering roller in the longitudinal direction . further comprising a guide mechanism for guiding relative movement between the skirt and the slide lid along the longitudinal direction;
The guide mechanism includes guide rollers connected to both sides of the slide lid in the width direction of the boom conveyor, and rotational movement of the guide rollers accompanying relative movement between the skirt and the slide lid along the longitudinal direction. a guiding lateral rail;
A chute device according to claim 1. When viewed from the side in a direction perpendicular to the longitudinal direction of the boom conveyor, the skirt and the slide lid each extend linearly along the longitudinal direction of the boom conveyor.
The chute device according to claim 1 or 2.

Images