CA2590087C - Closed type belt conveyor - Google Patents
Closed type belt conveyor Download PDFInfo
- Publication number
- CA2590087C CA2590087C CA 2590087 CA2590087A CA2590087C CA 2590087 C CA2590087 C CA 2590087C CA 2590087 CA2590087 CA 2590087 CA 2590087 A CA2590087 A CA 2590087A CA 2590087 C CA2590087 C CA 2590087C
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- CA
- Canada
- Prior art keywords
- top plate
- belt
- conveyor
- transfer section
- carrier belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/08—Protective roofs or arch supports therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/20—Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
- B65G21/2045—Mechanical means for guiding or retaining the load on the load-carrying surface
- B65G21/2063—Mechanical means for guiding or retaining the load on the load-carrying surface comprising elements not movable in the direction of load-transport
- B65G21/2072—Laterial guidance means
- B65G21/2081—Laterial guidance means for bulk material, e.g. skirts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Belt Conveyors (AREA)
Abstract
To provide a closed type belt conveyor that can be laid out in a small space, in which meanders of a belt rarely occur, and in which dust is not scattered. Glide plates are attached to both left and right sides in a conveyor frame, and a carrier belt is bent in a concave shape from a transfer section to a carrier end portion by both glide plates. A first top plate is fixed to a conveyor frame of the transfer section so as to cover a space between the conveyor frame of the transfer section and a skirt plate of a chute, a closed-section space is formed in both sides of the skirt plate of the chute, a second top plate is fixed to the conveyor frame on the downstream side of the transfer section so as to cover the upper portion of the carrier belt, a closed-section space for conveying the conveying object is formed in the upper portion of the carrier belt, and the end portion of the first top plate overlaps with the lower portion of the start portion of the second top plate.
Description
CLOSED TYPE BELT CONVEYOR
Field of the Invention The present invention relates to a closed type belt conveyor, and more particularly, to a belt conveyor which can be easily laid out in a narrow space, which hardly allows a belt to meander, and which does not scatter dust.
Background Currently, a belt conveyor is the lowest price conveyor as a transport mechanism and a number of conveyors have been employed in various kinds of factories or facilities. However, when a transport object is in a powder shape or contains a power-shaped object, the power-shaped object is easily scattered to the circumference. Accordingly, the circumference may be degraded. Thus, a dustproof device has been provided in the belt conveyor. For example, there is a method in which the entire of a carrier belt and a return belt of a belt conveyor or a predetermined range from the transfer section is covered with a cover (Patent Document 1, Patent Document 2, and Patent Document 3).
In addition, there has been proposed a method in which a sectional 11-shaped cover is placed on a flat carrier belt of a conveyor to form a closed passage and a chute is coupled with a cover (Patent Document 4).
Patent Document 1: Japanese Unexamined Utility Model Registration Application Publication No. 02-94829 Patent Document 2: Japanese Examined Utility Model Registration Application Publication No. 04-47149 Patent Document 3: Japanese Unexamined Patent Application Publication No. 2002-19940 Patent Document 4: Japanese Unexamined Patent Application Publication No. 09-142662 Summary However, in the belt conveyor described in Patent Documents 1 to 3, since the size of the cover which covers the carrier side and the return side is large, a large layout space is required. Accordingly, the belt conveyor cannot be applied to a case without the layout space in the periphery of the belt conveyor.
Further, in the belt conveyor described in Patent Document 4, since the size of the cover constituting the closed passage is respectively small, the layout is rarely limited. However, the cover is place on the flat carrier belt.
Accordingly, when meanders occur on the belt, a gap between the cover and The carrier belt occurs and thus dust may be scattered.
In consideration of the above-mentioned problems regarding the invention, an object of the invention is to provide a closed type belt conveyor which can be easily laid out even in a narrow space, in which meanders of a belt rarely occurs, and in which dust is not scattered.
Field of the Invention The present invention relates to a closed type belt conveyor, and more particularly, to a belt conveyor which can be easily laid out in a narrow space, which hardly allows a belt to meander, and which does not scatter dust.
Background Currently, a belt conveyor is the lowest price conveyor as a transport mechanism and a number of conveyors have been employed in various kinds of factories or facilities. However, when a transport object is in a powder shape or contains a power-shaped object, the power-shaped object is easily scattered to the circumference. Accordingly, the circumference may be degraded. Thus, a dustproof device has been provided in the belt conveyor. For example, there is a method in which the entire of a carrier belt and a return belt of a belt conveyor or a predetermined range from the transfer section is covered with a cover (Patent Document 1, Patent Document 2, and Patent Document 3).
In addition, there has been proposed a method in which a sectional 11-shaped cover is placed on a flat carrier belt of a conveyor to form a closed passage and a chute is coupled with a cover (Patent Document 4).
Patent Document 1: Japanese Unexamined Utility Model Registration Application Publication No. 02-94829 Patent Document 2: Japanese Examined Utility Model Registration Application Publication No. 04-47149 Patent Document 3: Japanese Unexamined Patent Application Publication No. 2002-19940 Patent Document 4: Japanese Unexamined Patent Application Publication No. 09-142662 Summary However, in the belt conveyor described in Patent Documents 1 to 3, since the size of the cover which covers the carrier side and the return side is large, a large layout space is required. Accordingly, the belt conveyor cannot be applied to a case without the layout space in the periphery of the belt conveyor.
Further, in the belt conveyor described in Patent Document 4, since the size of the cover constituting the closed passage is respectively small, the layout is rarely limited. However, the cover is place on the flat carrier belt.
Accordingly, when meanders occur on the belt, a gap between the cover and The carrier belt occurs and thus dust may be scattered.
In consideration of the above-mentioned problems regarding the invention, an object of the invention is to provide a closed type belt conveyor which can be easily laid out even in a narrow space, in which meanders of a belt rarely occurs, and in which dust is not scattered.
Certain exemplary embodiments can provide a closed type belt conveyor having an endless conveyor belt for receiving an object dropped from a chute to a transfer section on an upstream side of a carrier belt and for conveying the object to a downstream side thereof, the closed type belt conveyor comprising: a supporting frame attached to a conveyor frame for providing backside support to the conveyor belt, the supporting frame comprising a plurality of supporting rollers for supporting a main backside part of conveyor belt; a pair of glide plates attached to the sides of the conveyor frame extending from the transfer section, the conveyor belt being supported in a concave form; a first top plate fixed to the supporting frame of the transfer section and extending in a driving direction to cover a space between the supporting frame and a skirt plate of the chute to close an upside space of the conveyor belt; a second top plate fixed to the conveyor frame on the downstream side of the transfer section to cover the upper portion of the carrier belt, wherein an end portion of the first top plate overlaps with the lower portion of a start portion thereof; each one of the plurality of supporting rollers includes a horizontal center roller and a pair of half-length side slope rollers arranged at both sides of the center roller and being upwardly inclined in the outside direction; the pair of glide plates being arranged on the right and left sides of the conveyor frame and being upwardly inclined in an outside direction with a larger oblique angle than that of a side slope roller to enable the edges of the conveyor belt to bend inside to prevent meandering 3a motion of the conveyor belt; and closed-section spaces are formed in both sides of the skirt plate of the chute by the glide plates, the carrier belt and the first top plate or the second top plate, and a closed-section space for conveying the conveying object is formed above the carrier belt by the supporting rollers, the glide plates and the carrier belt.
In a closed type belt conveyor according to an embodiment having an endless conveyor belt that receives a conveying object dropped from a chute to a transfer section on the upstream side of a carrier belt and coveys the conveying =
In a closed type belt conveyor according to an embodiment having an endless conveyor belt that receives a conveying object dropped from a chute to a transfer section on the upstream side of a carrier belt and coveys the conveying =
ing object to the downstream side thereof, glide plates are obliquely attached to both left and right sides of a conveyor frame and the carrier belt is bent in a concave shape from the transfer section to a carrier end portion by the glide plates, a first top plate is fixed to the conveyor frame of the transfer section so as to cover a space between the conveyor frame of the transfer section and a skirt plate of the chute, a second top plate is fixed to the conveyer frame on the downstream side of the transfer section so as to cover the upper portion of the carrier belt, and an end portion of the first top plate overlaps with the lower portion of a start portion of the second top plate, and closed-section spaces are formed in both sides of the skirt plate of the chute by the glide plates, the carrier belt, and the first top plate and a closed-section space for conveying the conveying object is formed above the carrier belt by the glide plates, the carrier belt, and the second top plate.
In one embodiment the left and right glide plates are obliquely provided In the conveyor frame, the first and second top plates is attached to cover the carrier belt, and the closed-section space is formed by the glide plates, the carrier belt, and the first and second top plates. With such a configuration, it is possible to prevent the dust from being scattered to the circumference and the installation is not limited due to the layout space.
In another aspect the carrier belt is bent in the concave shape by the left and right glide plates. With such a configuration, the conveying object is stably mounted on the center of the carrier belt. In addition, since the tension is applied to the carrier belt so as to be pressed inward in the width direction, the meander of the carrier belt can be reduced and suppressed.
Since the transfer section and the downstream side thereof have structures different from each other to prevent the scattering of the dust, a structure for preventing the dust from being scattered from the boundary portion therebetween is required. Thus, when the end portion of the first top plate of the transfer section is allowed to overlap with the lower portion of the start portion of the second top plate on the downstream side of the transfer section, for example, by the length in the range of 30 cm to 80 cm, the dust is pulled to the downstream side due to the airflow by the travel of the carrier belt in spite of the fact that there is a gap between the first and second top plates.
Accordingly, it is confirmed that the dust is not scattered from the boundary portion therebetween.
In another aspect the first and second top plates are attached by using the conveyor frame. With such a configuration, since the structure of the invention may be simply applied to the conveyor provided in advance, the practical value thereof is great.
The first and second top plates may be attached to the conveyor frame, for example, by bolts, nuts, welding, or the like. Alternatively, when a -shaped attachment bracket is fixed to the conveyor frame and the outer end portion of the first top plate and the left and right end portions of the second top plate are fitted into the attachment bracket, the first and second top plates can be attached to the conveyor frame by a simple work. Further, when such an attachment bracket used, the first and second top plates can be simply detached even in case of an exchange of the first and second top plates for any reason. Accordingly, the exchange work can be simply performed.
When the first top plate is attached to cover the space between the skirt plate of the chute and the conveyor frame, the first top plate may be attached in any structure. For example, a fitting groove may be formed at the center of the first top plate, the first top plate may be curved in an arc shape at the time of attaching the first top plate to the conveyor frame, and the inner edge portion of the fitting groove may be closely pressed and attached to the skirt plate of the chute.
A fitting groove may be formed at the center of the first top plate, the first top plate flatly extends inward at the time of attaching the first top plate to the conveyor frame, a flexible curtain and a dustproof member may be fixed to the inner edge of the first top plate, the curtain is suspended and curved inward in a width direction, the lower portion of the curtain comes in slidable contact with the carrier belt, and the dustproof member may be closely attached to the outer surface of the skirt plate of the chute.
As the dustproof member and the contact member may employ synthetic resin foam such as urethane foam or a sponge such as a foaming rubber.
However, in consideration of the usage circumference of the conveyor belt, it is preferable to use a soft sponge formed of polyethylene based foam having excellent weather resistance, chemical resistance, durability, chemical resistance, and wear resistance.
The entire of the dustproof member or the contact member may be formed of the soft sponge. However, in consideration of vibrations or impacts =
to the dustproof member or the contact member, the dustproof member or the contact member may be formed to insert a center member into the soft sponge. The center member may be formed of any material if the center material has elasticity, and the center member is preferably formed of a synthetic resin in consideration of the cost thereof.
The glide plate may be formed of any material if the carrier belt can come in contact with the glide plate so as to be slid. For example, a polyethylene resin with high molecular weight may be used. In addition, the curtain may have flexibility and prevent the dust from being scattered. For example, rubber or soft synthetic resin material may be used.
In the transfer section, it is preferable that the carrier belt smoothly bent in the concave shape and then vertical rollers are obliquely provided on the upstream side thereof. That is, it is preferable that slope rollers are provided in the left and the right of the upstream side of the transfer section and the start portion of the carrier belt is bent in a concave shape.
Further, it is preferable that a plurality of horizontal rollers receiving the carrier belt are provided in the center in the width direction of the conveyor frame through the whole length in the longitudinal direction thereof with intervals therebetween. Particularly, in order to avoid that the carrier belt fluctuates up and down due to the impact at the time of receiving the conveying object from the chute, it is preferable that the horizontal rollers are provided with short intervals.
Brief Description of the Drawings Fig. 1 is a schematic constituent diagram illustrating a preferred embodiment of a closed type belt conveyor according to the invention.
Fig. 2 is a constituent diagram illustrating a structure of a transfer section A and a direct downstream side thereof in the embodiment.
Fig. 3 is a constituent diagram illustrating a structure of a transfer section A in the embodiment.
Fig. 4 is a constituent diagram illustrating a structure of a downstream side of a transfer section A in the embodiment.
Fig. 5 is a constituent diagram illustrating a structure of a horizontal roller 14 of a transfer section A in the embodiment.
Fig. 6 is a constituent diagram illustrating a structure of an upstream side of a transfer section A in a second embodiment.
Fig. 7 is a constituent diagram illustrating a structure of a transfer section A in the embodiment.
Fig. 8 is a constituent diagram illustrating a structure a boundary portion between a transfer section A and a downstream side in the embodiment.
Fig. 9 is a constituent diagram illustrating a structure of a downstream side of a transfer section A in the embodiment.
Detailed description of the preferred embodiment Hereinafter, the invention will be described in detail with reference to detailed examples shown in the drawings. Figs. 1 to 5 show preferred embodiments of the closed type belt conveyor according to the invention. The closed type belt conveyor according to the embodiment has the same structure as that of a schematic diagram shown in Fig. 1. That is, a conveyor belt B is suspended in an endless shape between rollers R1 and R2 at both front and rear ends thereof and any one of the rollers R1 and R2 is driven by a driving motor (not shown), thereby traveling the conveyor belt B in the endless shape.
A transfer section A is provided in a travel start portion of carrier belt B.
In the transfer section A, a conveying object from a chute S is received to the carrier belt B to be conveyed to the downstream side. A curtain N made of rubber or soft synthetic resin for prevent dust from be scattered is provided in the start portion of the transfer section A and the lower end of the curtain N
comes in contact with the carrier belt B so as to be slid or appropriates the carrier belt B. The upper portion of the carrier belt B is covered with first and second top plates Ti and T2 and the end portion of the second top plate T2 is inserted into a chute box SB of the belt conveyor.
Next, the detailed structure of the embodiment will be described with reference to Figs. 2 to 5. In Figs. 2 to 5, a conveyor frame 10 is constituted by a mount frame 11, a brace 12 mounted on the mount frame 11, and a carrier stand 13. A driving roller and a driven roller (not shown) are rotatably supported at both front and rear ends of the conveyor frame 10.
As shown in Fig. 2, a plurality of horizontal rollers 14 are disposed at the center of the conveyor frame 10 under the carrier belt B in the width direction through the whole length in the longitudinal direction with predetermined intervals and are rotatably supported between the left and right supporters 11A and 13A fixed to the mount frame 11.
The transfer section A is provided on the upstream side of the belt conveyor close to the carrier. In the transfer section A, skirt plates 17 at the left and right of the chute are disposed to extend in the longitudinal direction with intervals therebetween and are attached to the brace 12 of the conveyor frame 10. In the transfer section A, the intervals of the above-described horizontal rollers 14 are set to be smaller than those of the horizontal rollers 14 on the downstream side of the transfer section A and it is avoided that the carrier belt B waves due to the impact at the time of receiving the conveying object dropped from the chute.
Vertical rollers 15 are provided in both left and right sides of the start portion of the transfer section A, for example, at 45- from the vertical line, the vertical rollers 15 is rotatably supported between the carrier stand 13 and the supporter 13A, and the vertical rollers 15 bend the carrier belt B in a concave shape so as to send the carrier belt B to the transfer section A.
A glide plate 18 made of polyethylene with high molecular weight is obliquely provided to extend at the substantially whole length in the longitudinal direction from the transfer section A to the carrier end portion. The glide plate 18 is supported to the carrier stand 13 with a reception bracket 18A
interposed therebetween, comes in contact with both side portions of the carrier belt B
having the concave portion so as to be slid, and sends the carrier belt B with the concave shape to the carrier end portion.
=
Slope rollers 16 which are shorter than the vertical rollers 15 are provided in the lower portion of the glide plate 18. The slope rollers 16 are rotatably supported between the carrier stand 13 and the supporter 13A and guide the movement of the carrier belt B by the left and right slope rollers and the horizontal rollers 14.
In addition, a a-shaped attachment bracket 13B is fixed to the upper end of the reception bracket 18A of the left and right carrier stands 13 by a welding or an attachment screw. In the transfer section A, the outer end portion of the first top plate 20 which is a zinc coating plate is fitted into the attachment bracket 13B and is fixed by the attachment screw. The first top plate 20 covers the space between the skirt plate 17and the carrier stand 13.
A closed-section space M1 is formed in both sides of the skirt plate 17 of the chute by the glide plate 18, the first top plate 20, and the carrier belt B.
In the first top plate 20, a fitting groove is formed in the center in the width direction and the skirt plate 17 of the chute is fitted into the fitting groove. The inner edge of the fitting groove of the first top plate 20 comes in contact with the a curved portion 17A of the upper end of the skirt plate 17 and thus the first top plate 20 is bent in an arc shape, thereby not pulling out the first top plate 20.
A soft sponge cap 17B is attached to the skirt plate 17 by the Attachment bracket, and the cape 176 is tightly pressed by both edge portions of the carrier belt B.
On the downstream side from the transfer section A, the outer end portion of the second top plate 25 which is the zinc coating plate is fitted to the left and right attachment brackets 13B and fixed by the attachment screw.
The second top plate 25 is curved in the arc shape and covers the upper portions of the carrier belt B and the glide plate 18. In addition, a closed-section space M2 is formed in the upper portion of the carrier belt by the glide plate 18, the second top plate 25, and the carrier belt B.
In the direct downstream side of the transfer section A, the end portion of the first top plate 20 overlaps with and is inserted to the lower portion of the start portion of the second top plate 25 and, for example, by about 50 cm.
When the conveying object is dropped from the chute, the conveying object is received to the carrier belt B in the transfer section A and conveyed to the downstream side by the carrier belt B.
At that time, the power-shaped object contained in the conveying object becomes dust and flies in the transfer section A and the downstream side D
thereof. In the transfer section A, the closed-section space M1 is formed by the skirt plate 17, the first top plate 20, and the glide plate 18. Further, the gap in the transfer section A is practically closed. Accordingly, the dust is not scattered from the transfer section A to the circumference.
In addition, since the closed-section space M2 is formed on the downstream side D of the transfer section A by the carrier belt B, the second top plate 25, and the glide plate 19, the dust is not scattered from the downstream side D of the transfer section A to the circumference.
Further, in the boundary C between the transfer section A and the downstream side thereof, the first and second top plates 20 and 25 overlap with each other so that the former is the lower and the dust is pulled toward the downstream side D of the transfer section A by the airflow upon traveling the carrier belt B. Accordingly, the dust is not scattered from the boundary C
between the first and second top plates 20 and 25.
As described above, the first and second top plates 20 and 25 are attached to the conveyor frame 10, the closed-section space M1 is formed in both sides of the skirt plate 17 of the chute in the transfer section A, and the closed-section space M2 for conveying the conveying object is formed.
Accordingly, it is possible to reliably prevent the dust from being scattered to the circumference. Further, the belt conveyor has a compact size and thus there is no case where the installation is limited due to the layout space.
Since the carrier belt B is bent in the concave shape by the glide plate 18, the conveying object is stably mounted at the center of the carrier belt B.
In addition, since tension is applied to the carrier belt B to be pressed inward in the width direction by the glide plate 18, the meander of the carrier belt B is reduced and suppressed.
On the downstream side D of the transfer section A, the slope roller 16 has the short size and only glide plate 18 is exposed in the side of the conveyor frame 10. Accordingly, a case where fingers of a worker are caught between the rollers at the time of checking the belt conveyor to damage the worker scarcely occurs.
Figs. 6 to 9 show a second embodiment. In Figs. 6 to 9, the same reference numerals as those in Figs. 1 to 5 indicate the same or corresponding parts. In this embodiment, a first glide plate 18 is provided between the vertical rollers of the start portion and the end portion of the transfer section A
so as to extend in the longitudinal direction of the first glide plate 18 in the sectional arc shapes in both left and right sides thereof, the upper end portion of the first glide plate 18 is attached to the brace 12, and the lower end portion of the first glide 18 is placed on the cushion such as a soft sponge on the supporter 12A and attached to absorb impacts or vibrations by the press of the attachment bracket.
The first glide plate 18 is manufactured, for example, by using a polyethylene resin with high molecular weight and sends the carrier belt B
curved by the vertical roller 15 of the start portion to the downstream side D
with the carrier belt B kept in the U shape.
On the downstream side D of the transfer section A, a flat (or sectional arc-shaped) second glide plate 19 is obliquely disposed in the upper portion of the slope roller 16 to extend through the whole length in the longitudinal direction, is received to the reception bracket 18A, and is attached to the carrier stand 13. The carrier belt B coming from the transfer section A is kept in the concave shape as shown in Figs. 8 and 9.
In the transfer section A, the first top plate 20 having a narrow width extends inward and is fixed to the upper end of the carrier stand 13, a curtain 21 and the a dustproof member 22 are fixed to the inner end of the first top plate 20. The flexible curtain 21 is manufactured, for example, by using polyethylene resin with high molecular weight and extends through the whole length in the longitudinal direction of the transfer section A. Further, the lower portion of the curtain 21 is curved inward in the width direction and comes in contact with the carrier belt B so as to be slid.
=
The dustproof member 22 is manufactured, for example, by using a foaming polyethylene resin and is closely attached to the skirt plate 17 of the chute. In this manner, a closed-section space M1 is formed in the outer portion of the skirt plate 17.
Similarly with the first embodiment, on the downstream side D of the transfer section A, the -shaped attachment bracket 13B is fixed to the reception brackets 18A of the left and right carrier stands 13, both end portions of the second top plate 25 are fitted into the attachment bracket 13B and fixed by the attachment screw, the second top plate 25 is curved in the arc shape and pulled out, and a closed-section space M2 is formed by the second glide plate 19, the carrier belt B, and the second top plate 25.
The first top plate 20 and the curtain 21 enter the lower portion of the second top plate 25 in the direct downstream side of the transfer section A. A
contact member 26 is disposed between a structure including the curtain 21, the first top plate 20, and the first glide plate 18 and a structure including the second top plate 25 and the second glide plate 19, whereby the curtain 21, the first top plate 20 and the first glide plate 18 are connected to the second top plate 25 and the second glide plate 19.
In the first embodiment, the cap 17A is provided on the skirt plate 17.
However, since the scattering of the dust is suppressed by the closed-section space Ml, the cap 17A is not necessarily provided.
Meanwhile, in the second embodiment, the contact member 26 is provided. However, since the dust is not scattered from the boundary between the transfer section A and the downstream side by pulling the dust by the airflow upon traveling the carrier belt B, the contact member 26 is not necessarily provided.
In one embodiment the left and right glide plates are obliquely provided In the conveyor frame, the first and second top plates is attached to cover the carrier belt, and the closed-section space is formed by the glide plates, the carrier belt, and the first and second top plates. With such a configuration, it is possible to prevent the dust from being scattered to the circumference and the installation is not limited due to the layout space.
In another aspect the carrier belt is bent in the concave shape by the left and right glide plates. With such a configuration, the conveying object is stably mounted on the center of the carrier belt. In addition, since the tension is applied to the carrier belt so as to be pressed inward in the width direction, the meander of the carrier belt can be reduced and suppressed.
Since the transfer section and the downstream side thereof have structures different from each other to prevent the scattering of the dust, a structure for preventing the dust from being scattered from the boundary portion therebetween is required. Thus, when the end portion of the first top plate of the transfer section is allowed to overlap with the lower portion of the start portion of the second top plate on the downstream side of the transfer section, for example, by the length in the range of 30 cm to 80 cm, the dust is pulled to the downstream side due to the airflow by the travel of the carrier belt in spite of the fact that there is a gap between the first and second top plates.
Accordingly, it is confirmed that the dust is not scattered from the boundary portion therebetween.
In another aspect the first and second top plates are attached by using the conveyor frame. With such a configuration, since the structure of the invention may be simply applied to the conveyor provided in advance, the practical value thereof is great.
The first and second top plates may be attached to the conveyor frame, for example, by bolts, nuts, welding, or the like. Alternatively, when a -shaped attachment bracket is fixed to the conveyor frame and the outer end portion of the first top plate and the left and right end portions of the second top plate are fitted into the attachment bracket, the first and second top plates can be attached to the conveyor frame by a simple work. Further, when such an attachment bracket used, the first and second top plates can be simply detached even in case of an exchange of the first and second top plates for any reason. Accordingly, the exchange work can be simply performed.
When the first top plate is attached to cover the space between the skirt plate of the chute and the conveyor frame, the first top plate may be attached in any structure. For example, a fitting groove may be formed at the center of the first top plate, the first top plate may be curved in an arc shape at the time of attaching the first top plate to the conveyor frame, and the inner edge portion of the fitting groove may be closely pressed and attached to the skirt plate of the chute.
A fitting groove may be formed at the center of the first top plate, the first top plate flatly extends inward at the time of attaching the first top plate to the conveyor frame, a flexible curtain and a dustproof member may be fixed to the inner edge of the first top plate, the curtain is suspended and curved inward in a width direction, the lower portion of the curtain comes in slidable contact with the carrier belt, and the dustproof member may be closely attached to the outer surface of the skirt plate of the chute.
As the dustproof member and the contact member may employ synthetic resin foam such as urethane foam or a sponge such as a foaming rubber.
However, in consideration of the usage circumference of the conveyor belt, it is preferable to use a soft sponge formed of polyethylene based foam having excellent weather resistance, chemical resistance, durability, chemical resistance, and wear resistance.
The entire of the dustproof member or the contact member may be formed of the soft sponge. However, in consideration of vibrations or impacts =
to the dustproof member or the contact member, the dustproof member or the contact member may be formed to insert a center member into the soft sponge. The center member may be formed of any material if the center material has elasticity, and the center member is preferably formed of a synthetic resin in consideration of the cost thereof.
The glide plate may be formed of any material if the carrier belt can come in contact with the glide plate so as to be slid. For example, a polyethylene resin with high molecular weight may be used. In addition, the curtain may have flexibility and prevent the dust from being scattered. For example, rubber or soft synthetic resin material may be used.
In the transfer section, it is preferable that the carrier belt smoothly bent in the concave shape and then vertical rollers are obliquely provided on the upstream side thereof. That is, it is preferable that slope rollers are provided in the left and the right of the upstream side of the transfer section and the start portion of the carrier belt is bent in a concave shape.
Further, it is preferable that a plurality of horizontal rollers receiving the carrier belt are provided in the center in the width direction of the conveyor frame through the whole length in the longitudinal direction thereof with intervals therebetween. Particularly, in order to avoid that the carrier belt fluctuates up and down due to the impact at the time of receiving the conveying object from the chute, it is preferable that the horizontal rollers are provided with short intervals.
Brief Description of the Drawings Fig. 1 is a schematic constituent diagram illustrating a preferred embodiment of a closed type belt conveyor according to the invention.
Fig. 2 is a constituent diagram illustrating a structure of a transfer section A and a direct downstream side thereof in the embodiment.
Fig. 3 is a constituent diagram illustrating a structure of a transfer section A in the embodiment.
Fig. 4 is a constituent diagram illustrating a structure of a downstream side of a transfer section A in the embodiment.
Fig. 5 is a constituent diagram illustrating a structure of a horizontal roller 14 of a transfer section A in the embodiment.
Fig. 6 is a constituent diagram illustrating a structure of an upstream side of a transfer section A in a second embodiment.
Fig. 7 is a constituent diagram illustrating a structure of a transfer section A in the embodiment.
Fig. 8 is a constituent diagram illustrating a structure a boundary portion between a transfer section A and a downstream side in the embodiment.
Fig. 9 is a constituent diagram illustrating a structure of a downstream side of a transfer section A in the embodiment.
Detailed description of the preferred embodiment Hereinafter, the invention will be described in detail with reference to detailed examples shown in the drawings. Figs. 1 to 5 show preferred embodiments of the closed type belt conveyor according to the invention. The closed type belt conveyor according to the embodiment has the same structure as that of a schematic diagram shown in Fig. 1. That is, a conveyor belt B is suspended in an endless shape between rollers R1 and R2 at both front and rear ends thereof and any one of the rollers R1 and R2 is driven by a driving motor (not shown), thereby traveling the conveyor belt B in the endless shape.
A transfer section A is provided in a travel start portion of carrier belt B.
In the transfer section A, a conveying object from a chute S is received to the carrier belt B to be conveyed to the downstream side. A curtain N made of rubber or soft synthetic resin for prevent dust from be scattered is provided in the start portion of the transfer section A and the lower end of the curtain N
comes in contact with the carrier belt B so as to be slid or appropriates the carrier belt B. The upper portion of the carrier belt B is covered with first and second top plates Ti and T2 and the end portion of the second top plate T2 is inserted into a chute box SB of the belt conveyor.
Next, the detailed structure of the embodiment will be described with reference to Figs. 2 to 5. In Figs. 2 to 5, a conveyor frame 10 is constituted by a mount frame 11, a brace 12 mounted on the mount frame 11, and a carrier stand 13. A driving roller and a driven roller (not shown) are rotatably supported at both front and rear ends of the conveyor frame 10.
As shown in Fig. 2, a plurality of horizontal rollers 14 are disposed at the center of the conveyor frame 10 under the carrier belt B in the width direction through the whole length in the longitudinal direction with predetermined intervals and are rotatably supported between the left and right supporters 11A and 13A fixed to the mount frame 11.
The transfer section A is provided on the upstream side of the belt conveyor close to the carrier. In the transfer section A, skirt plates 17 at the left and right of the chute are disposed to extend in the longitudinal direction with intervals therebetween and are attached to the brace 12 of the conveyor frame 10. In the transfer section A, the intervals of the above-described horizontal rollers 14 are set to be smaller than those of the horizontal rollers 14 on the downstream side of the transfer section A and it is avoided that the carrier belt B waves due to the impact at the time of receiving the conveying object dropped from the chute.
Vertical rollers 15 are provided in both left and right sides of the start portion of the transfer section A, for example, at 45- from the vertical line, the vertical rollers 15 is rotatably supported between the carrier stand 13 and the supporter 13A, and the vertical rollers 15 bend the carrier belt B in a concave shape so as to send the carrier belt B to the transfer section A.
A glide plate 18 made of polyethylene with high molecular weight is obliquely provided to extend at the substantially whole length in the longitudinal direction from the transfer section A to the carrier end portion. The glide plate 18 is supported to the carrier stand 13 with a reception bracket 18A
interposed therebetween, comes in contact with both side portions of the carrier belt B
having the concave portion so as to be slid, and sends the carrier belt B with the concave shape to the carrier end portion.
=
Slope rollers 16 which are shorter than the vertical rollers 15 are provided in the lower portion of the glide plate 18. The slope rollers 16 are rotatably supported between the carrier stand 13 and the supporter 13A and guide the movement of the carrier belt B by the left and right slope rollers and the horizontal rollers 14.
In addition, a a-shaped attachment bracket 13B is fixed to the upper end of the reception bracket 18A of the left and right carrier stands 13 by a welding or an attachment screw. In the transfer section A, the outer end portion of the first top plate 20 which is a zinc coating plate is fitted into the attachment bracket 13B and is fixed by the attachment screw. The first top plate 20 covers the space between the skirt plate 17and the carrier stand 13.
A closed-section space M1 is formed in both sides of the skirt plate 17 of the chute by the glide plate 18, the first top plate 20, and the carrier belt B.
In the first top plate 20, a fitting groove is formed in the center in the width direction and the skirt plate 17 of the chute is fitted into the fitting groove. The inner edge of the fitting groove of the first top plate 20 comes in contact with the a curved portion 17A of the upper end of the skirt plate 17 and thus the first top plate 20 is bent in an arc shape, thereby not pulling out the first top plate 20.
A soft sponge cap 17B is attached to the skirt plate 17 by the Attachment bracket, and the cape 176 is tightly pressed by both edge portions of the carrier belt B.
On the downstream side from the transfer section A, the outer end portion of the second top plate 25 which is the zinc coating plate is fitted to the left and right attachment brackets 13B and fixed by the attachment screw.
The second top plate 25 is curved in the arc shape and covers the upper portions of the carrier belt B and the glide plate 18. In addition, a closed-section space M2 is formed in the upper portion of the carrier belt by the glide plate 18, the second top plate 25, and the carrier belt B.
In the direct downstream side of the transfer section A, the end portion of the first top plate 20 overlaps with and is inserted to the lower portion of the start portion of the second top plate 25 and, for example, by about 50 cm.
When the conveying object is dropped from the chute, the conveying object is received to the carrier belt B in the transfer section A and conveyed to the downstream side by the carrier belt B.
At that time, the power-shaped object contained in the conveying object becomes dust and flies in the transfer section A and the downstream side D
thereof. In the transfer section A, the closed-section space M1 is formed by the skirt plate 17, the first top plate 20, and the glide plate 18. Further, the gap in the transfer section A is practically closed. Accordingly, the dust is not scattered from the transfer section A to the circumference.
In addition, since the closed-section space M2 is formed on the downstream side D of the transfer section A by the carrier belt B, the second top plate 25, and the glide plate 19, the dust is not scattered from the downstream side D of the transfer section A to the circumference.
Further, in the boundary C between the transfer section A and the downstream side thereof, the first and second top plates 20 and 25 overlap with each other so that the former is the lower and the dust is pulled toward the downstream side D of the transfer section A by the airflow upon traveling the carrier belt B. Accordingly, the dust is not scattered from the boundary C
between the first and second top plates 20 and 25.
As described above, the first and second top plates 20 and 25 are attached to the conveyor frame 10, the closed-section space M1 is formed in both sides of the skirt plate 17 of the chute in the transfer section A, and the closed-section space M2 for conveying the conveying object is formed.
Accordingly, it is possible to reliably prevent the dust from being scattered to the circumference. Further, the belt conveyor has a compact size and thus there is no case where the installation is limited due to the layout space.
Since the carrier belt B is bent in the concave shape by the glide plate 18, the conveying object is stably mounted at the center of the carrier belt B.
In addition, since tension is applied to the carrier belt B to be pressed inward in the width direction by the glide plate 18, the meander of the carrier belt B is reduced and suppressed.
On the downstream side D of the transfer section A, the slope roller 16 has the short size and only glide plate 18 is exposed in the side of the conveyor frame 10. Accordingly, a case where fingers of a worker are caught between the rollers at the time of checking the belt conveyor to damage the worker scarcely occurs.
Figs. 6 to 9 show a second embodiment. In Figs. 6 to 9, the same reference numerals as those in Figs. 1 to 5 indicate the same or corresponding parts. In this embodiment, a first glide plate 18 is provided between the vertical rollers of the start portion and the end portion of the transfer section A
so as to extend in the longitudinal direction of the first glide plate 18 in the sectional arc shapes in both left and right sides thereof, the upper end portion of the first glide plate 18 is attached to the brace 12, and the lower end portion of the first glide 18 is placed on the cushion such as a soft sponge on the supporter 12A and attached to absorb impacts or vibrations by the press of the attachment bracket.
The first glide plate 18 is manufactured, for example, by using a polyethylene resin with high molecular weight and sends the carrier belt B
curved by the vertical roller 15 of the start portion to the downstream side D
with the carrier belt B kept in the U shape.
On the downstream side D of the transfer section A, a flat (or sectional arc-shaped) second glide plate 19 is obliquely disposed in the upper portion of the slope roller 16 to extend through the whole length in the longitudinal direction, is received to the reception bracket 18A, and is attached to the carrier stand 13. The carrier belt B coming from the transfer section A is kept in the concave shape as shown in Figs. 8 and 9.
In the transfer section A, the first top plate 20 having a narrow width extends inward and is fixed to the upper end of the carrier stand 13, a curtain 21 and the a dustproof member 22 are fixed to the inner end of the first top plate 20. The flexible curtain 21 is manufactured, for example, by using polyethylene resin with high molecular weight and extends through the whole length in the longitudinal direction of the transfer section A. Further, the lower portion of the curtain 21 is curved inward in the width direction and comes in contact with the carrier belt B so as to be slid.
=
The dustproof member 22 is manufactured, for example, by using a foaming polyethylene resin and is closely attached to the skirt plate 17 of the chute. In this manner, a closed-section space M1 is formed in the outer portion of the skirt plate 17.
Similarly with the first embodiment, on the downstream side D of the transfer section A, the -shaped attachment bracket 13B is fixed to the reception brackets 18A of the left and right carrier stands 13, both end portions of the second top plate 25 are fitted into the attachment bracket 13B and fixed by the attachment screw, the second top plate 25 is curved in the arc shape and pulled out, and a closed-section space M2 is formed by the second glide plate 19, the carrier belt B, and the second top plate 25.
The first top plate 20 and the curtain 21 enter the lower portion of the second top plate 25 in the direct downstream side of the transfer section A. A
contact member 26 is disposed between a structure including the curtain 21, the first top plate 20, and the first glide plate 18 and a structure including the second top plate 25 and the second glide plate 19, whereby the curtain 21, the first top plate 20 and the first glide plate 18 are connected to the second top plate 25 and the second glide plate 19.
In the first embodiment, the cap 17A is provided on the skirt plate 17.
However, since the scattering of the dust is suppressed by the closed-section space Ml, the cap 17A is not necessarily provided.
Meanwhile, in the second embodiment, the contact member 26 is provided. However, since the dust is not scattered from the boundary between the transfer section A and the downstream side by pulling the dust by the airflow upon traveling the carrier belt B, the contact member 26 is not necessarily provided.
Claims (5)
1. A closed type belt conveyor having an endless conveyor belt for receiving an object dropped from a chute to a transfer section on an upstream side of a carrier belt and for conveying the object to a downstream side thereof, the closed type belt conveyor comprising:
a supporting frame attached to a conveyor frame for providing backside support to the conveyor belt, the supporting frame comprising a plurality of supporting rollers for supporting a main backside part of conveyor belt;
a pair of glide plates attached to the sides of the conveyor frame extending from the transfer section, the conveyor belt being supported in a concave form;
a first top plate fixed to the supporting frame of the transfer section and extending in a driving direction to cover a space between the supporting frame and a skirt plate of the chute to close an upside space of the conveyor belt;
a second top plate fixed to the conveyor frame on the downstream side of the transfer section to cover the upper portion of the carrier belt, wherein an end portion of the first top plate overlaps with the lower portion of a start portion thereof;
each one of the plurality of supporting rollers includes a horizontal center roller and a pair of half-length side slope rollers arranged at both sides of the center roller and being upwardly inclined in the outside direction;
the pair of glide plates being arranged on the right and left sides of the conveyor frame and being upwardly inclined in an outside direction with a larger oblique angle than that of a side slope roller to enable the edges of the conveyor belt to bend inside to prevent meandering motion of the conveyor belt; and closed-section spaces are formed in both sides of the skirt plate of the chute by the glide plates, the carrier belt and the first top plate or the second top plate, and a closed-section space for conveying the conveying object is formed above the carrier belt by the supporting rollers, the glide plates and the carrier belt.
a supporting frame attached to a conveyor frame for providing backside support to the conveyor belt, the supporting frame comprising a plurality of supporting rollers for supporting a main backside part of conveyor belt;
a pair of glide plates attached to the sides of the conveyor frame extending from the transfer section, the conveyor belt being supported in a concave form;
a first top plate fixed to the supporting frame of the transfer section and extending in a driving direction to cover a space between the supporting frame and a skirt plate of the chute to close an upside space of the conveyor belt;
a second top plate fixed to the conveyor frame on the downstream side of the transfer section to cover the upper portion of the carrier belt, wherein an end portion of the first top plate overlaps with the lower portion of a start portion thereof;
each one of the plurality of supporting rollers includes a horizontal center roller and a pair of half-length side slope rollers arranged at both sides of the center roller and being upwardly inclined in the outside direction;
the pair of glide plates being arranged on the right and left sides of the conveyor frame and being upwardly inclined in an outside direction with a larger oblique angle than that of a side slope roller to enable the edges of the conveyor belt to bend inside to prevent meandering motion of the conveyor belt; and closed-section spaces are formed in both sides of the skirt plate of the chute by the glide plates, the carrier belt and the first top plate or the second top plate, and a closed-section space for conveying the conveying object is formed above the carrier belt by the supporting rollers, the glide plates and the carrier belt.
2. The closed type belt conveyor according to claim 1, wherein an attachment bracket is fixed to the supporting frame and the outer end portion of the first top plate and the left and right end portions of the second top plate are fitted into the attachment bracket so that the first and second top plates are attached to the conveyor frame.
3. The closed type belt conveyor according to claim 1 or 2, wherein a fitting groove is formed at the center of the first top plate, the first top plate is curved in an arc shape when attaching the first top plate to the conveyor frame, and the inner edge of the fitting groove is closely pressed and attached to the skirt plate of the chute.
4. The closed type belt conveyor according to Claim 1 or 2, wherein a fitting groove is formed at the center of the first top plate, the first top plate flatly extends inward when attaching the first top plate to the conveyor frame, a flexible curtain and a dustproof member are fixed to the inner edge of the first top plate, the curtain is suspended and curved inward in a width direction, the lower portion of the curtain in slidable contact with the carrier belt, and the dustproof member is closely attached to the outer surface of the skirt plate of the chute.
5. The closed type belt conveyor according to Claim 1, wherein slope rollers are provided on the upstream left and right side of the transfer section and the start portion of the carrier belt is bent in a concave shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2590087 CA2590087C (en) | 2007-05-24 | 2007-05-24 | Closed type belt conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2590087 CA2590087C (en) | 2007-05-24 | 2007-05-24 | Closed type belt conveyor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2590087A1 CA2590087A1 (en) | 2008-11-24 |
| CA2590087C true CA2590087C (en) | 2015-01-20 |
Family
ID=40074379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2590087 Expired - Fee Related CA2590087C (en) | 2007-05-24 | 2007-05-24 | Closed type belt conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2590087C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2967985B1 (en) * | 2010-11-26 | 2014-02-28 | Emile Alexandre Lacroix | CURVILIGNE SEAL BELT CONVEYOR |
-
2007
- 2007-05-24 CA CA 2590087 patent/CA2590087C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2590087A1 (en) | 2008-11-24 |
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Effective date: 20170524 |